1 /* drivers/net/ethernet/freescale/gianfar.c 2 * 3 * Gianfar Ethernet Driver 4 * This driver is designed for the non-CPM ethernet controllers 5 * on the 85xx and 83xx family of integrated processors 6 * Based on 8260_io/fcc_enet.c 7 * 8 * Author: Andy Fleming 9 * Maintainer: Kumar Gala 10 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com> 11 * 12 * Copyright 2002-2009, 2011-2013 Freescale Semiconductor, Inc. 13 * Copyright 2007 MontaVista Software, Inc. 14 * 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License as published by the 17 * Free Software Foundation; either version 2 of the License, or (at your 18 * option) any later version. 19 * 20 * Gianfar: AKA Lambda Draconis, "Dragon" 21 * RA 11 31 24.2 22 * Dec +69 19 52 23 * V 3.84 24 * B-V +1.62 25 * 26 * Theory of operation 27 * 28 * The driver is initialized through of_device. Configuration information 29 * is therefore conveyed through an OF-style device tree. 30 * 31 * The Gianfar Ethernet Controller uses a ring of buffer 32 * descriptors. The beginning is indicated by a register 33 * pointing to the physical address of the start of the ring. 34 * The end is determined by a "wrap" bit being set in the 35 * last descriptor of the ring. 36 * 37 * When a packet is received, the RXF bit in the 38 * IEVENT register is set, triggering an interrupt when the 39 * corresponding bit in the IMASK register is also set (if 40 * interrupt coalescing is active, then the interrupt may not 41 * happen immediately, but will wait until either a set number 42 * of frames or amount of time have passed). In NAPI, the 43 * interrupt handler will signal there is work to be done, and 44 * exit. This method will start at the last known empty 45 * descriptor, and process every subsequent descriptor until there 46 * are none left with data (NAPI will stop after a set number of 47 * packets to give time to other tasks, but will eventually 48 * process all the packets). The data arrives inside a 49 * pre-allocated skb, and so after the skb is passed up to the 50 * stack, a new skb must be allocated, and the address field in 51 * the buffer descriptor must be updated to indicate this new 52 * skb. 53 * 54 * When the kernel requests that a packet be transmitted, the 55 * driver starts where it left off last time, and points the 56 * descriptor at the buffer which was passed in. The driver 57 * then informs the DMA engine that there are packets ready to 58 * be transmitted. Once the controller is finished transmitting 59 * the packet, an interrupt may be triggered (under the same 60 * conditions as for reception, but depending on the TXF bit). 61 * The driver then cleans up the buffer. 62 */ 63 64 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 65 #define DEBUG 66 67 #include <linux/kernel.h> 68 #include <linux/string.h> 69 #include <linux/errno.h> 70 #include <linux/unistd.h> 71 #include <linux/slab.h> 72 #include <linux/interrupt.h> 73 #include <linux/delay.h> 74 #include <linux/netdevice.h> 75 #include <linux/etherdevice.h> 76 #include <linux/skbuff.h> 77 #include <linux/if_vlan.h> 78 #include <linux/spinlock.h> 79 #include <linux/mm.h> 80 #include <linux/of_address.h> 81 #include <linux/of_irq.h> 82 #include <linux/of_mdio.h> 83 #include <linux/of_platform.h> 84 #include <linux/ip.h> 85 #include <linux/tcp.h> 86 #include <linux/udp.h> 87 #include <linux/in.h> 88 #include <linux/net_tstamp.h> 89 90 #include <asm/io.h> 91 #ifdef CONFIG_PPC 92 #include <asm/reg.h> 93 #include <asm/mpc85xx.h> 94 #endif 95 #include <asm/irq.h> 96 #include <asm/uaccess.h> 97 #include <linux/module.h> 98 #include <linux/dma-mapping.h> 99 #include <linux/crc32.h> 100 #include <linux/mii.h> 101 #include <linux/phy.h> 102 #include <linux/phy_fixed.h> 103 #include <linux/of.h> 104 #include <linux/of_net.h> 105 #include <linux/of_address.h> 106 #include <linux/of_irq.h> 107 108 #include "gianfar.h" 109 110 #define TX_TIMEOUT (1*HZ) 111 112 const char gfar_driver_version[] = "2.0"; 113 114 static int gfar_enet_open(struct net_device *dev); 115 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev); 116 static void gfar_reset_task(struct work_struct *work); 117 static void gfar_timeout(struct net_device *dev); 118 static int gfar_close(struct net_device *dev); 119 static void gfar_alloc_rx_buffs(struct gfar_priv_rx_q *rx_queue, 120 int alloc_cnt); 121 static int gfar_set_mac_address(struct net_device *dev); 122 static int gfar_change_mtu(struct net_device *dev, int new_mtu); 123 static irqreturn_t gfar_error(int irq, void *dev_id); 124 static irqreturn_t gfar_transmit(int irq, void *dev_id); 125 static irqreturn_t gfar_interrupt(int irq, void *dev_id); 126 static void adjust_link(struct net_device *dev); 127 static noinline void gfar_update_link_state(struct gfar_private *priv); 128 static int init_phy(struct net_device *dev); 129 static int gfar_probe(struct platform_device *ofdev); 130 static int gfar_remove(struct platform_device *ofdev); 131 static void free_skb_resources(struct gfar_private *priv); 132 static void gfar_set_multi(struct net_device *dev); 133 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr); 134 static void gfar_configure_serdes(struct net_device *dev); 135 static int gfar_poll_rx(struct napi_struct *napi, int budget); 136 static int gfar_poll_tx(struct napi_struct *napi, int budget); 137 static int gfar_poll_rx_sq(struct napi_struct *napi, int budget); 138 static int gfar_poll_tx_sq(struct napi_struct *napi, int budget); 139 #ifdef CONFIG_NET_POLL_CONTROLLER 140 static void gfar_netpoll(struct net_device *dev); 141 #endif 142 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit); 143 static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue); 144 static void gfar_process_frame(struct net_device *ndev, struct sk_buff *skb); 145 static void gfar_halt_nodisable(struct gfar_private *priv); 146 static void gfar_clear_exact_match(struct net_device *dev); 147 static void gfar_set_mac_for_addr(struct net_device *dev, int num, 148 const u8 *addr); 149 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 150 151 MODULE_AUTHOR("Freescale Semiconductor, Inc"); 152 MODULE_DESCRIPTION("Gianfar Ethernet Driver"); 153 MODULE_LICENSE("GPL"); 154 155 static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp, 156 dma_addr_t buf) 157 { 158 u32 lstatus; 159 160 bdp->bufPtr = cpu_to_be32(buf); 161 162 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT); 163 if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1) 164 lstatus |= BD_LFLAG(RXBD_WRAP); 165 166 gfar_wmb(); 167 168 bdp->lstatus = cpu_to_be32(lstatus); 169 } 170 171 static void gfar_init_bds(struct net_device *ndev) 172 { 173 struct gfar_private *priv = netdev_priv(ndev); 174 struct gfar __iomem *regs = priv->gfargrp[0].regs; 175 struct gfar_priv_tx_q *tx_queue = NULL; 176 struct gfar_priv_rx_q *rx_queue = NULL; 177 struct txbd8 *txbdp; 178 u32 __iomem *rfbptr; 179 int i, j; 180 181 for (i = 0; i < priv->num_tx_queues; i++) { 182 tx_queue = priv->tx_queue[i]; 183 /* Initialize some variables in our dev structure */ 184 tx_queue->num_txbdfree = tx_queue->tx_ring_size; 185 tx_queue->dirty_tx = tx_queue->tx_bd_base; 186 tx_queue->cur_tx = tx_queue->tx_bd_base; 187 tx_queue->skb_curtx = 0; 188 tx_queue->skb_dirtytx = 0; 189 190 /* Initialize Transmit Descriptor Ring */ 191 txbdp = tx_queue->tx_bd_base; 192 for (j = 0; j < tx_queue->tx_ring_size; j++) { 193 txbdp->lstatus = 0; 194 txbdp->bufPtr = 0; 195 txbdp++; 196 } 197 198 /* Set the last descriptor in the ring to indicate wrap */ 199 txbdp--; 200 txbdp->status = cpu_to_be16(be16_to_cpu(txbdp->status) | 201 TXBD_WRAP); 202 } 203 204 rfbptr = ®s->rfbptr0; 205 for (i = 0; i < priv->num_rx_queues; i++) { 206 rx_queue = priv->rx_queue[i]; 207 208 rx_queue->next_to_clean = 0; 209 rx_queue->next_to_use = 0; 210 rx_queue->next_to_alloc = 0; 211 212 /* make sure next_to_clean != next_to_use after this 213 * by leaving at least 1 unused descriptor 214 */ 215 gfar_alloc_rx_buffs(rx_queue, gfar_rxbd_unused(rx_queue)); 216 217 rx_queue->rfbptr = rfbptr; 218 rfbptr += 2; 219 } 220 } 221 222 static int gfar_alloc_skb_resources(struct net_device *ndev) 223 { 224 void *vaddr; 225 dma_addr_t addr; 226 int i, j; 227 struct gfar_private *priv = netdev_priv(ndev); 228 struct device *dev = priv->dev; 229 struct gfar_priv_tx_q *tx_queue = NULL; 230 struct gfar_priv_rx_q *rx_queue = NULL; 231 232 priv->total_tx_ring_size = 0; 233 for (i = 0; i < priv->num_tx_queues; i++) 234 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size; 235 236 priv->total_rx_ring_size = 0; 237 for (i = 0; i < priv->num_rx_queues; i++) 238 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size; 239 240 /* Allocate memory for the buffer descriptors */ 241 vaddr = dma_alloc_coherent(dev, 242 (priv->total_tx_ring_size * 243 sizeof(struct txbd8)) + 244 (priv->total_rx_ring_size * 245 sizeof(struct rxbd8)), 246 &addr, GFP_KERNEL); 247 if (!vaddr) 248 return -ENOMEM; 249 250 for (i = 0; i < priv->num_tx_queues; i++) { 251 tx_queue = priv->tx_queue[i]; 252 tx_queue->tx_bd_base = vaddr; 253 tx_queue->tx_bd_dma_base = addr; 254 tx_queue->dev = ndev; 255 /* enet DMA only understands physical addresses */ 256 addr += sizeof(struct txbd8) * tx_queue->tx_ring_size; 257 vaddr += sizeof(struct txbd8) * tx_queue->tx_ring_size; 258 } 259 260 /* Start the rx descriptor ring where the tx ring leaves off */ 261 for (i = 0; i < priv->num_rx_queues; i++) { 262 rx_queue = priv->rx_queue[i]; 263 rx_queue->rx_bd_base = vaddr; 264 rx_queue->rx_bd_dma_base = addr; 265 rx_queue->ndev = ndev; 266 rx_queue->dev = dev; 267 addr += sizeof(struct rxbd8) * rx_queue->rx_ring_size; 268 vaddr += sizeof(struct rxbd8) * rx_queue->rx_ring_size; 269 } 270 271 /* Setup the skbuff rings */ 272 for (i = 0; i < priv->num_tx_queues; i++) { 273 tx_queue = priv->tx_queue[i]; 274 tx_queue->tx_skbuff = 275 kmalloc_array(tx_queue->tx_ring_size, 276 sizeof(*tx_queue->tx_skbuff), 277 GFP_KERNEL); 278 if (!tx_queue->tx_skbuff) 279 goto cleanup; 280 281 for (j = 0; j < tx_queue->tx_ring_size; j++) 282 tx_queue->tx_skbuff[j] = NULL; 283 } 284 285 for (i = 0; i < priv->num_rx_queues; i++) { 286 rx_queue = priv->rx_queue[i]; 287 rx_queue->rx_buff = kcalloc(rx_queue->rx_ring_size, 288 sizeof(*rx_queue->rx_buff), 289 GFP_KERNEL); 290 if (!rx_queue->rx_buff) 291 goto cleanup; 292 } 293 294 gfar_init_bds(ndev); 295 296 return 0; 297 298 cleanup: 299 free_skb_resources(priv); 300 return -ENOMEM; 301 } 302 303 static void gfar_init_tx_rx_base(struct gfar_private *priv) 304 { 305 struct gfar __iomem *regs = priv->gfargrp[0].regs; 306 u32 __iomem *baddr; 307 int i; 308 309 baddr = ®s->tbase0; 310 for (i = 0; i < priv->num_tx_queues; i++) { 311 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base); 312 baddr += 2; 313 } 314 315 baddr = ®s->rbase0; 316 for (i = 0; i < priv->num_rx_queues; i++) { 317 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base); 318 baddr += 2; 319 } 320 } 321 322 static void gfar_init_rqprm(struct gfar_private *priv) 323 { 324 struct gfar __iomem *regs = priv->gfargrp[0].regs; 325 u32 __iomem *baddr; 326 int i; 327 328 baddr = ®s->rqprm0; 329 for (i = 0; i < priv->num_rx_queues; i++) { 330 gfar_write(baddr, priv->rx_queue[i]->rx_ring_size | 331 (DEFAULT_RX_LFC_THR << FBTHR_SHIFT)); 332 baddr++; 333 } 334 } 335 336 static void gfar_rx_offload_en(struct gfar_private *priv) 337 { 338 /* set this when rx hw offload (TOE) functions are being used */ 339 priv->uses_rxfcb = 0; 340 341 if (priv->ndev->features & (NETIF_F_RXCSUM | NETIF_F_HW_VLAN_CTAG_RX)) 342 priv->uses_rxfcb = 1; 343 344 if (priv->hwts_rx_en) 345 priv->uses_rxfcb = 1; 346 } 347 348 static void gfar_mac_rx_config(struct gfar_private *priv) 349 { 350 struct gfar __iomem *regs = priv->gfargrp[0].regs; 351 u32 rctrl = 0; 352 353 if (priv->rx_filer_enable) { 354 rctrl |= RCTRL_FILREN; 355 /* Program the RIR0 reg with the required distribution */ 356 if (priv->poll_mode == GFAR_SQ_POLLING) 357 gfar_write(®s->rir0, DEFAULT_2RXQ_RIR0); 358 else /* GFAR_MQ_POLLING */ 359 gfar_write(®s->rir0, DEFAULT_8RXQ_RIR0); 360 } 361 362 /* Restore PROMISC mode */ 363 if (priv->ndev->flags & IFF_PROMISC) 364 rctrl |= RCTRL_PROM; 365 366 if (priv->ndev->features & NETIF_F_RXCSUM) 367 rctrl |= RCTRL_CHECKSUMMING; 368 369 if (priv->extended_hash) 370 rctrl |= RCTRL_EXTHASH | RCTRL_EMEN; 371 372 if (priv->padding) { 373 rctrl &= ~RCTRL_PAL_MASK; 374 rctrl |= RCTRL_PADDING(priv->padding); 375 } 376 377 /* Enable HW time stamping if requested from user space */ 378 if (priv->hwts_rx_en) 379 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE; 380 381 if (priv->ndev->features & NETIF_F_HW_VLAN_CTAG_RX) 382 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; 383 384 /* Clear the LFC bit */ 385 gfar_write(®s->rctrl, rctrl); 386 /* Init flow control threshold values */ 387 gfar_init_rqprm(priv); 388 gfar_write(®s->ptv, DEFAULT_LFC_PTVVAL); 389 rctrl |= RCTRL_LFC; 390 391 /* Init rctrl based on our settings */ 392 gfar_write(®s->rctrl, rctrl); 393 } 394 395 static void gfar_mac_tx_config(struct gfar_private *priv) 396 { 397 struct gfar __iomem *regs = priv->gfargrp[0].regs; 398 u32 tctrl = 0; 399 400 if (priv->ndev->features & NETIF_F_IP_CSUM) 401 tctrl |= TCTRL_INIT_CSUM; 402 403 if (priv->prio_sched_en) 404 tctrl |= TCTRL_TXSCHED_PRIO; 405 else { 406 tctrl |= TCTRL_TXSCHED_WRRS; 407 gfar_write(®s->tr03wt, DEFAULT_WRRS_WEIGHT); 408 gfar_write(®s->tr47wt, DEFAULT_WRRS_WEIGHT); 409 } 410 411 if (priv->ndev->features & NETIF_F_HW_VLAN_CTAG_TX) 412 tctrl |= TCTRL_VLINS; 413 414 gfar_write(®s->tctrl, tctrl); 415 } 416 417 static void gfar_configure_coalescing(struct gfar_private *priv, 418 unsigned long tx_mask, unsigned long rx_mask) 419 { 420 struct gfar __iomem *regs = priv->gfargrp[0].regs; 421 u32 __iomem *baddr; 422 423 if (priv->mode == MQ_MG_MODE) { 424 int i = 0; 425 426 baddr = ®s->txic0; 427 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) { 428 gfar_write(baddr + i, 0); 429 if (likely(priv->tx_queue[i]->txcoalescing)) 430 gfar_write(baddr + i, priv->tx_queue[i]->txic); 431 } 432 433 baddr = ®s->rxic0; 434 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) { 435 gfar_write(baddr + i, 0); 436 if (likely(priv->rx_queue[i]->rxcoalescing)) 437 gfar_write(baddr + i, priv->rx_queue[i]->rxic); 438 } 439 } else { 440 /* Backward compatible case -- even if we enable 441 * multiple queues, there's only single reg to program 442 */ 443 gfar_write(®s->txic, 0); 444 if (likely(priv->tx_queue[0]->txcoalescing)) 445 gfar_write(®s->txic, priv->tx_queue[0]->txic); 446 447 gfar_write(®s->rxic, 0); 448 if (unlikely(priv->rx_queue[0]->rxcoalescing)) 449 gfar_write(®s->rxic, priv->rx_queue[0]->rxic); 450 } 451 } 452 453 void gfar_configure_coalescing_all(struct gfar_private *priv) 454 { 455 gfar_configure_coalescing(priv, 0xFF, 0xFF); 456 } 457 458 static struct net_device_stats *gfar_get_stats(struct net_device *dev) 459 { 460 struct gfar_private *priv = netdev_priv(dev); 461 unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0; 462 unsigned long tx_packets = 0, tx_bytes = 0; 463 int i; 464 465 for (i = 0; i < priv->num_rx_queues; i++) { 466 rx_packets += priv->rx_queue[i]->stats.rx_packets; 467 rx_bytes += priv->rx_queue[i]->stats.rx_bytes; 468 rx_dropped += priv->rx_queue[i]->stats.rx_dropped; 469 } 470 471 dev->stats.rx_packets = rx_packets; 472 dev->stats.rx_bytes = rx_bytes; 473 dev->stats.rx_dropped = rx_dropped; 474 475 for (i = 0; i < priv->num_tx_queues; i++) { 476 tx_bytes += priv->tx_queue[i]->stats.tx_bytes; 477 tx_packets += priv->tx_queue[i]->stats.tx_packets; 478 } 479 480 dev->stats.tx_bytes = tx_bytes; 481 dev->stats.tx_packets = tx_packets; 482 483 return &dev->stats; 484 } 485 486 static int gfar_set_mac_addr(struct net_device *dev, void *p) 487 { 488 eth_mac_addr(dev, p); 489 490 gfar_set_mac_for_addr(dev, 0, dev->dev_addr); 491 492 return 0; 493 } 494 495 static const struct net_device_ops gfar_netdev_ops = { 496 .ndo_open = gfar_enet_open, 497 .ndo_start_xmit = gfar_start_xmit, 498 .ndo_stop = gfar_close, 499 .ndo_change_mtu = gfar_change_mtu, 500 .ndo_set_features = gfar_set_features, 501 .ndo_set_rx_mode = gfar_set_multi, 502 .ndo_tx_timeout = gfar_timeout, 503 .ndo_do_ioctl = gfar_ioctl, 504 .ndo_get_stats = gfar_get_stats, 505 .ndo_set_mac_address = gfar_set_mac_addr, 506 .ndo_validate_addr = eth_validate_addr, 507 #ifdef CONFIG_NET_POLL_CONTROLLER 508 .ndo_poll_controller = gfar_netpoll, 509 #endif 510 }; 511 512 static void gfar_ints_disable(struct gfar_private *priv) 513 { 514 int i; 515 for (i = 0; i < priv->num_grps; i++) { 516 struct gfar __iomem *regs = priv->gfargrp[i].regs; 517 /* Clear IEVENT */ 518 gfar_write(®s->ievent, IEVENT_INIT_CLEAR); 519 520 /* Initialize IMASK */ 521 gfar_write(®s->imask, IMASK_INIT_CLEAR); 522 } 523 } 524 525 static void gfar_ints_enable(struct gfar_private *priv) 526 { 527 int i; 528 for (i = 0; i < priv->num_grps; i++) { 529 struct gfar __iomem *regs = priv->gfargrp[i].regs; 530 /* Unmask the interrupts we look for */ 531 gfar_write(®s->imask, IMASK_DEFAULT); 532 } 533 } 534 535 static int gfar_alloc_tx_queues(struct gfar_private *priv) 536 { 537 int i; 538 539 for (i = 0; i < priv->num_tx_queues; i++) { 540 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q), 541 GFP_KERNEL); 542 if (!priv->tx_queue[i]) 543 return -ENOMEM; 544 545 priv->tx_queue[i]->tx_skbuff = NULL; 546 priv->tx_queue[i]->qindex = i; 547 priv->tx_queue[i]->dev = priv->ndev; 548 spin_lock_init(&(priv->tx_queue[i]->txlock)); 549 } 550 return 0; 551 } 552 553 static int gfar_alloc_rx_queues(struct gfar_private *priv) 554 { 555 int i; 556 557 for (i = 0; i < priv->num_rx_queues; i++) { 558 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q), 559 GFP_KERNEL); 560 if (!priv->rx_queue[i]) 561 return -ENOMEM; 562 563 priv->rx_queue[i]->qindex = i; 564 priv->rx_queue[i]->ndev = priv->ndev; 565 } 566 return 0; 567 } 568 569 static void gfar_free_tx_queues(struct gfar_private *priv) 570 { 571 int i; 572 573 for (i = 0; i < priv->num_tx_queues; i++) 574 kfree(priv->tx_queue[i]); 575 } 576 577 static void gfar_free_rx_queues(struct gfar_private *priv) 578 { 579 int i; 580 581 for (i = 0; i < priv->num_rx_queues; i++) 582 kfree(priv->rx_queue[i]); 583 } 584 585 static void unmap_group_regs(struct gfar_private *priv) 586 { 587 int i; 588 589 for (i = 0; i < MAXGROUPS; i++) 590 if (priv->gfargrp[i].regs) 591 iounmap(priv->gfargrp[i].regs); 592 } 593 594 static void free_gfar_dev(struct gfar_private *priv) 595 { 596 int i, j; 597 598 for (i = 0; i < priv->num_grps; i++) 599 for (j = 0; j < GFAR_NUM_IRQS; j++) { 600 kfree(priv->gfargrp[i].irqinfo[j]); 601 priv->gfargrp[i].irqinfo[j] = NULL; 602 } 603 604 free_netdev(priv->ndev); 605 } 606 607 static void disable_napi(struct gfar_private *priv) 608 { 609 int i; 610 611 for (i = 0; i < priv->num_grps; i++) { 612 napi_disable(&priv->gfargrp[i].napi_rx); 613 napi_disable(&priv->gfargrp[i].napi_tx); 614 } 615 } 616 617 static void enable_napi(struct gfar_private *priv) 618 { 619 int i; 620 621 for (i = 0; i < priv->num_grps; i++) { 622 napi_enable(&priv->gfargrp[i].napi_rx); 623 napi_enable(&priv->gfargrp[i].napi_tx); 624 } 625 } 626 627 static int gfar_parse_group(struct device_node *np, 628 struct gfar_private *priv, const char *model) 629 { 630 struct gfar_priv_grp *grp = &priv->gfargrp[priv->num_grps]; 631 int i; 632 633 for (i = 0; i < GFAR_NUM_IRQS; i++) { 634 grp->irqinfo[i] = kzalloc(sizeof(struct gfar_irqinfo), 635 GFP_KERNEL); 636 if (!grp->irqinfo[i]) 637 return -ENOMEM; 638 } 639 640 grp->regs = of_iomap(np, 0); 641 if (!grp->regs) 642 return -ENOMEM; 643 644 gfar_irq(grp, TX)->irq = irq_of_parse_and_map(np, 0); 645 646 /* If we aren't the FEC we have multiple interrupts */ 647 if (model && strcasecmp(model, "FEC")) { 648 gfar_irq(grp, RX)->irq = irq_of_parse_and_map(np, 1); 649 gfar_irq(grp, ER)->irq = irq_of_parse_and_map(np, 2); 650 if (gfar_irq(grp, TX)->irq == NO_IRQ || 651 gfar_irq(grp, RX)->irq == NO_IRQ || 652 gfar_irq(grp, ER)->irq == NO_IRQ) 653 return -EINVAL; 654 } 655 656 grp->priv = priv; 657 spin_lock_init(&grp->grplock); 658 if (priv->mode == MQ_MG_MODE) { 659 u32 rxq_mask, txq_mask; 660 int ret; 661 662 grp->rx_bit_map = (DEFAULT_MAPPING >> priv->num_grps); 663 grp->tx_bit_map = (DEFAULT_MAPPING >> priv->num_grps); 664 665 ret = of_property_read_u32(np, "fsl,rx-bit-map", &rxq_mask); 666 if (!ret) { 667 grp->rx_bit_map = rxq_mask ? 668 rxq_mask : (DEFAULT_MAPPING >> priv->num_grps); 669 } 670 671 ret = of_property_read_u32(np, "fsl,tx-bit-map", &txq_mask); 672 if (!ret) { 673 grp->tx_bit_map = txq_mask ? 674 txq_mask : (DEFAULT_MAPPING >> priv->num_grps); 675 } 676 677 if (priv->poll_mode == GFAR_SQ_POLLING) { 678 /* One Q per interrupt group: Q0 to G0, Q1 to G1 */ 679 grp->rx_bit_map = (DEFAULT_MAPPING >> priv->num_grps); 680 grp->tx_bit_map = (DEFAULT_MAPPING >> priv->num_grps); 681 } 682 } else { 683 grp->rx_bit_map = 0xFF; 684 grp->tx_bit_map = 0xFF; 685 } 686 687 /* bit_map's MSB is q0 (from q0 to q7) but, for_each_set_bit parses 688 * right to left, so we need to revert the 8 bits to get the q index 689 */ 690 grp->rx_bit_map = bitrev8(grp->rx_bit_map); 691 grp->tx_bit_map = bitrev8(grp->tx_bit_map); 692 693 /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values, 694 * also assign queues to groups 695 */ 696 for_each_set_bit(i, &grp->rx_bit_map, priv->num_rx_queues) { 697 if (!grp->rx_queue) 698 grp->rx_queue = priv->rx_queue[i]; 699 grp->num_rx_queues++; 700 grp->rstat |= (RSTAT_CLEAR_RHALT >> i); 701 priv->rqueue |= ((RQUEUE_EN0 | RQUEUE_EX0) >> i); 702 priv->rx_queue[i]->grp = grp; 703 } 704 705 for_each_set_bit(i, &grp->tx_bit_map, priv->num_tx_queues) { 706 if (!grp->tx_queue) 707 grp->tx_queue = priv->tx_queue[i]; 708 grp->num_tx_queues++; 709 grp->tstat |= (TSTAT_CLEAR_THALT >> i); 710 priv->tqueue |= (TQUEUE_EN0 >> i); 711 priv->tx_queue[i]->grp = grp; 712 } 713 714 priv->num_grps++; 715 716 return 0; 717 } 718 719 static int gfar_of_group_count(struct device_node *np) 720 { 721 struct device_node *child; 722 int num = 0; 723 724 for_each_available_child_of_node(np, child) 725 if (!of_node_cmp(child->name, "queue-group")) 726 num++; 727 728 return num; 729 } 730 731 static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev) 732 { 733 const char *model; 734 const char *ctype; 735 const void *mac_addr; 736 int err = 0, i; 737 struct net_device *dev = NULL; 738 struct gfar_private *priv = NULL; 739 struct device_node *np = ofdev->dev.of_node; 740 struct device_node *child = NULL; 741 struct property *stash; 742 u32 stash_len = 0; 743 u32 stash_idx = 0; 744 unsigned int num_tx_qs, num_rx_qs; 745 unsigned short mode, poll_mode; 746 747 if (!np) 748 return -ENODEV; 749 750 if (of_device_is_compatible(np, "fsl,etsec2")) { 751 mode = MQ_MG_MODE; 752 poll_mode = GFAR_SQ_POLLING; 753 } else { 754 mode = SQ_SG_MODE; 755 poll_mode = GFAR_SQ_POLLING; 756 } 757 758 if (mode == SQ_SG_MODE) { 759 num_tx_qs = 1; 760 num_rx_qs = 1; 761 } else { /* MQ_MG_MODE */ 762 /* get the actual number of supported groups */ 763 unsigned int num_grps = gfar_of_group_count(np); 764 765 if (num_grps == 0 || num_grps > MAXGROUPS) { 766 dev_err(&ofdev->dev, "Invalid # of int groups(%d)\n", 767 num_grps); 768 pr_err("Cannot do alloc_etherdev, aborting\n"); 769 return -EINVAL; 770 } 771 772 if (poll_mode == GFAR_SQ_POLLING) { 773 num_tx_qs = num_grps; /* one txq per int group */ 774 num_rx_qs = num_grps; /* one rxq per int group */ 775 } else { /* GFAR_MQ_POLLING */ 776 u32 tx_queues, rx_queues; 777 int ret; 778 779 /* parse the num of HW tx and rx queues */ 780 ret = of_property_read_u32(np, "fsl,num_tx_queues", 781 &tx_queues); 782 num_tx_qs = ret ? 1 : tx_queues; 783 784 ret = of_property_read_u32(np, "fsl,num_rx_queues", 785 &rx_queues); 786 num_rx_qs = ret ? 1 : rx_queues; 787 } 788 } 789 790 if (num_tx_qs > MAX_TX_QS) { 791 pr_err("num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n", 792 num_tx_qs, MAX_TX_QS); 793 pr_err("Cannot do alloc_etherdev, aborting\n"); 794 return -EINVAL; 795 } 796 797 if (num_rx_qs > MAX_RX_QS) { 798 pr_err("num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n", 799 num_rx_qs, MAX_RX_QS); 800 pr_err("Cannot do alloc_etherdev, aborting\n"); 801 return -EINVAL; 802 } 803 804 *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs); 805 dev = *pdev; 806 if (NULL == dev) 807 return -ENOMEM; 808 809 priv = netdev_priv(dev); 810 priv->ndev = dev; 811 812 priv->mode = mode; 813 priv->poll_mode = poll_mode; 814 815 priv->num_tx_queues = num_tx_qs; 816 netif_set_real_num_rx_queues(dev, num_rx_qs); 817 priv->num_rx_queues = num_rx_qs; 818 819 err = gfar_alloc_tx_queues(priv); 820 if (err) 821 goto tx_alloc_failed; 822 823 err = gfar_alloc_rx_queues(priv); 824 if (err) 825 goto rx_alloc_failed; 826 827 err = of_property_read_string(np, "model", &model); 828 if (err) { 829 pr_err("Device model property missing, aborting\n"); 830 goto rx_alloc_failed; 831 } 832 833 /* Init Rx queue filer rule set linked list */ 834 INIT_LIST_HEAD(&priv->rx_list.list); 835 priv->rx_list.count = 0; 836 mutex_init(&priv->rx_queue_access); 837 838 for (i = 0; i < MAXGROUPS; i++) 839 priv->gfargrp[i].regs = NULL; 840 841 /* Parse and initialize group specific information */ 842 if (priv->mode == MQ_MG_MODE) { 843 for_each_available_child_of_node(np, child) { 844 if (of_node_cmp(child->name, "queue-group")) 845 continue; 846 847 err = gfar_parse_group(child, priv, model); 848 if (err) 849 goto err_grp_init; 850 } 851 } else { /* SQ_SG_MODE */ 852 err = gfar_parse_group(np, priv, model); 853 if (err) 854 goto err_grp_init; 855 } 856 857 stash = of_find_property(np, "bd-stash", NULL); 858 859 if (stash) { 860 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING; 861 priv->bd_stash_en = 1; 862 } 863 864 err = of_property_read_u32(np, "rx-stash-len", &stash_len); 865 866 if (err == 0) 867 priv->rx_stash_size = stash_len; 868 869 err = of_property_read_u32(np, "rx-stash-idx", &stash_idx); 870 871 if (err == 0) 872 priv->rx_stash_index = stash_idx; 873 874 if (stash_len || stash_idx) 875 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING; 876 877 mac_addr = of_get_mac_address(np); 878 879 if (mac_addr) 880 memcpy(dev->dev_addr, mac_addr, ETH_ALEN); 881 882 if (model && !strcasecmp(model, "TSEC")) 883 priv->device_flags |= FSL_GIANFAR_DEV_HAS_GIGABIT | 884 FSL_GIANFAR_DEV_HAS_COALESCE | 885 FSL_GIANFAR_DEV_HAS_RMON | 886 FSL_GIANFAR_DEV_HAS_MULTI_INTR; 887 888 if (model && !strcasecmp(model, "eTSEC")) 889 priv->device_flags |= FSL_GIANFAR_DEV_HAS_GIGABIT | 890 FSL_GIANFAR_DEV_HAS_COALESCE | 891 FSL_GIANFAR_DEV_HAS_RMON | 892 FSL_GIANFAR_DEV_HAS_MULTI_INTR | 893 FSL_GIANFAR_DEV_HAS_CSUM | 894 FSL_GIANFAR_DEV_HAS_VLAN | 895 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | 896 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH | 897 FSL_GIANFAR_DEV_HAS_TIMER; 898 899 err = of_property_read_string(np, "phy-connection-type", &ctype); 900 901 /* We only care about rgmii-id. The rest are autodetected */ 902 if (err == 0 && !strcmp(ctype, "rgmii-id")) 903 priv->interface = PHY_INTERFACE_MODE_RGMII_ID; 904 else 905 priv->interface = PHY_INTERFACE_MODE_MII; 906 907 if (of_find_property(np, "fsl,magic-packet", NULL)) 908 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET; 909 910 priv->phy_node = of_parse_phandle(np, "phy-handle", 0); 911 912 /* In the case of a fixed PHY, the DT node associated 913 * to the PHY is the Ethernet MAC DT node. 914 */ 915 if (!priv->phy_node && of_phy_is_fixed_link(np)) { 916 err = of_phy_register_fixed_link(np); 917 if (err) 918 goto err_grp_init; 919 920 priv->phy_node = of_node_get(np); 921 } 922 923 /* Find the TBI PHY. If it's not there, we don't support SGMII */ 924 priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0); 925 926 return 0; 927 928 err_grp_init: 929 unmap_group_regs(priv); 930 rx_alloc_failed: 931 gfar_free_rx_queues(priv); 932 tx_alloc_failed: 933 gfar_free_tx_queues(priv); 934 free_gfar_dev(priv); 935 return err; 936 } 937 938 static int gfar_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr) 939 { 940 struct hwtstamp_config config; 941 struct gfar_private *priv = netdev_priv(netdev); 942 943 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 944 return -EFAULT; 945 946 /* reserved for future extensions */ 947 if (config.flags) 948 return -EINVAL; 949 950 switch (config.tx_type) { 951 case HWTSTAMP_TX_OFF: 952 priv->hwts_tx_en = 0; 953 break; 954 case HWTSTAMP_TX_ON: 955 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) 956 return -ERANGE; 957 priv->hwts_tx_en = 1; 958 break; 959 default: 960 return -ERANGE; 961 } 962 963 switch (config.rx_filter) { 964 case HWTSTAMP_FILTER_NONE: 965 if (priv->hwts_rx_en) { 966 priv->hwts_rx_en = 0; 967 reset_gfar(netdev); 968 } 969 break; 970 default: 971 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) 972 return -ERANGE; 973 if (!priv->hwts_rx_en) { 974 priv->hwts_rx_en = 1; 975 reset_gfar(netdev); 976 } 977 config.rx_filter = HWTSTAMP_FILTER_ALL; 978 break; 979 } 980 981 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? 982 -EFAULT : 0; 983 } 984 985 static int gfar_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr) 986 { 987 struct hwtstamp_config config; 988 struct gfar_private *priv = netdev_priv(netdev); 989 990 config.flags = 0; 991 config.tx_type = priv->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; 992 config.rx_filter = (priv->hwts_rx_en ? 993 HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE); 994 995 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? 996 -EFAULT : 0; 997 } 998 999 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1000 { 1001 struct gfar_private *priv = netdev_priv(dev); 1002 1003 if (!netif_running(dev)) 1004 return -EINVAL; 1005 1006 if (cmd == SIOCSHWTSTAMP) 1007 return gfar_hwtstamp_set(dev, rq); 1008 if (cmd == SIOCGHWTSTAMP) 1009 return gfar_hwtstamp_get(dev, rq); 1010 1011 if (!priv->phydev) 1012 return -ENODEV; 1013 1014 return phy_mii_ioctl(priv->phydev, rq, cmd); 1015 } 1016 1017 static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar, 1018 u32 class) 1019 { 1020 u32 rqfpr = FPR_FILER_MASK; 1021 u32 rqfcr = 0x0; 1022 1023 rqfar--; 1024 rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT; 1025 priv->ftp_rqfpr[rqfar] = rqfpr; 1026 priv->ftp_rqfcr[rqfar] = rqfcr; 1027 gfar_write_filer(priv, rqfar, rqfcr, rqfpr); 1028 1029 rqfar--; 1030 rqfcr = RQFCR_CMP_NOMATCH; 1031 priv->ftp_rqfpr[rqfar] = rqfpr; 1032 priv->ftp_rqfcr[rqfar] = rqfcr; 1033 gfar_write_filer(priv, rqfar, rqfcr, rqfpr); 1034 1035 rqfar--; 1036 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND; 1037 rqfpr = class; 1038 priv->ftp_rqfcr[rqfar] = rqfcr; 1039 priv->ftp_rqfpr[rqfar] = rqfpr; 1040 gfar_write_filer(priv, rqfar, rqfcr, rqfpr); 1041 1042 rqfar--; 1043 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND; 1044 rqfpr = class; 1045 priv->ftp_rqfcr[rqfar] = rqfcr; 1046 priv->ftp_rqfpr[rqfar] = rqfpr; 1047 gfar_write_filer(priv, rqfar, rqfcr, rqfpr); 1048 1049 return rqfar; 1050 } 1051 1052 static void gfar_init_filer_table(struct gfar_private *priv) 1053 { 1054 int i = 0x0; 1055 u32 rqfar = MAX_FILER_IDX; 1056 u32 rqfcr = 0x0; 1057 u32 rqfpr = FPR_FILER_MASK; 1058 1059 /* Default rule */ 1060 rqfcr = RQFCR_CMP_MATCH; 1061 priv->ftp_rqfcr[rqfar] = rqfcr; 1062 priv->ftp_rqfpr[rqfar] = rqfpr; 1063 gfar_write_filer(priv, rqfar, rqfcr, rqfpr); 1064 1065 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6); 1066 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP); 1067 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP); 1068 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4); 1069 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP); 1070 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP); 1071 1072 /* cur_filer_idx indicated the first non-masked rule */ 1073 priv->cur_filer_idx = rqfar; 1074 1075 /* Rest are masked rules */ 1076 rqfcr = RQFCR_CMP_NOMATCH; 1077 for (i = 0; i < rqfar; i++) { 1078 priv->ftp_rqfcr[i] = rqfcr; 1079 priv->ftp_rqfpr[i] = rqfpr; 1080 gfar_write_filer(priv, i, rqfcr, rqfpr); 1081 } 1082 } 1083 1084 #ifdef CONFIG_PPC 1085 static void __gfar_detect_errata_83xx(struct gfar_private *priv) 1086 { 1087 unsigned int pvr = mfspr(SPRN_PVR); 1088 unsigned int svr = mfspr(SPRN_SVR); 1089 unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */ 1090 unsigned int rev = svr & 0xffff; 1091 1092 /* MPC8313 Rev 2.0 and higher; All MPC837x */ 1093 if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) || 1094 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0)) 1095 priv->errata |= GFAR_ERRATA_74; 1096 1097 /* MPC8313 and MPC837x all rev */ 1098 if ((pvr == 0x80850010 && mod == 0x80b0) || 1099 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0)) 1100 priv->errata |= GFAR_ERRATA_76; 1101 1102 /* MPC8313 Rev < 2.0 */ 1103 if (pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) 1104 priv->errata |= GFAR_ERRATA_12; 1105 } 1106 1107 static void __gfar_detect_errata_85xx(struct gfar_private *priv) 1108 { 1109 unsigned int svr = mfspr(SPRN_SVR); 1110 1111 if ((SVR_SOC_VER(svr) == SVR_8548) && (SVR_REV(svr) == 0x20)) 1112 priv->errata |= GFAR_ERRATA_12; 1113 if (((SVR_SOC_VER(svr) == SVR_P2020) && (SVR_REV(svr) < 0x20)) || 1114 ((SVR_SOC_VER(svr) == SVR_P2010) && (SVR_REV(svr) < 0x20))) 1115 priv->errata |= GFAR_ERRATA_76; /* aka eTSEC 20 */ 1116 } 1117 #endif 1118 1119 static void gfar_detect_errata(struct gfar_private *priv) 1120 { 1121 struct device *dev = &priv->ofdev->dev; 1122 1123 /* no plans to fix */ 1124 priv->errata |= GFAR_ERRATA_A002; 1125 1126 #ifdef CONFIG_PPC 1127 if (pvr_version_is(PVR_VER_E500V1) || pvr_version_is(PVR_VER_E500V2)) 1128 __gfar_detect_errata_85xx(priv); 1129 else /* non-mpc85xx parts, i.e. e300 core based */ 1130 __gfar_detect_errata_83xx(priv); 1131 #endif 1132 1133 if (priv->errata) 1134 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n", 1135 priv->errata); 1136 } 1137 1138 void gfar_mac_reset(struct gfar_private *priv) 1139 { 1140 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1141 u32 tempval; 1142 1143 /* Reset MAC layer */ 1144 gfar_write(®s->maccfg1, MACCFG1_SOFT_RESET); 1145 1146 /* We need to delay at least 3 TX clocks */ 1147 udelay(3); 1148 1149 /* the soft reset bit is not self-resetting, so we need to 1150 * clear it before resuming normal operation 1151 */ 1152 gfar_write(®s->maccfg1, 0); 1153 1154 udelay(3); 1155 1156 gfar_rx_offload_en(priv); 1157 1158 /* Initialize the max receive frame/buffer lengths */ 1159 gfar_write(®s->maxfrm, GFAR_JUMBO_FRAME_SIZE); 1160 gfar_write(®s->mrblr, GFAR_RXB_SIZE); 1161 1162 /* Initialize the Minimum Frame Length Register */ 1163 gfar_write(®s->minflr, MINFLR_INIT_SETTINGS); 1164 1165 /* Initialize MACCFG2. */ 1166 tempval = MACCFG2_INIT_SETTINGS; 1167 1168 /* eTSEC74 erratum: Rx frames of length MAXFRM or MAXFRM-1 1169 * are marked as truncated. Avoid this by MACCFG2[Huge Frame]=1, 1170 * and by checking RxBD[LG] and discarding larger than MAXFRM. 1171 */ 1172 if (gfar_has_errata(priv, GFAR_ERRATA_74)) 1173 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK; 1174 1175 gfar_write(®s->maccfg2, tempval); 1176 1177 /* Clear mac addr hash registers */ 1178 gfar_write(®s->igaddr0, 0); 1179 gfar_write(®s->igaddr1, 0); 1180 gfar_write(®s->igaddr2, 0); 1181 gfar_write(®s->igaddr3, 0); 1182 gfar_write(®s->igaddr4, 0); 1183 gfar_write(®s->igaddr5, 0); 1184 gfar_write(®s->igaddr6, 0); 1185 gfar_write(®s->igaddr7, 0); 1186 1187 gfar_write(®s->gaddr0, 0); 1188 gfar_write(®s->gaddr1, 0); 1189 gfar_write(®s->gaddr2, 0); 1190 gfar_write(®s->gaddr3, 0); 1191 gfar_write(®s->gaddr4, 0); 1192 gfar_write(®s->gaddr5, 0); 1193 gfar_write(®s->gaddr6, 0); 1194 gfar_write(®s->gaddr7, 0); 1195 1196 if (priv->extended_hash) 1197 gfar_clear_exact_match(priv->ndev); 1198 1199 gfar_mac_rx_config(priv); 1200 1201 gfar_mac_tx_config(priv); 1202 1203 gfar_set_mac_address(priv->ndev); 1204 1205 gfar_set_multi(priv->ndev); 1206 1207 /* clear ievent and imask before configuring coalescing */ 1208 gfar_ints_disable(priv); 1209 1210 /* Configure the coalescing support */ 1211 gfar_configure_coalescing_all(priv); 1212 } 1213 1214 static void gfar_hw_init(struct gfar_private *priv) 1215 { 1216 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1217 u32 attrs; 1218 1219 /* Stop the DMA engine now, in case it was running before 1220 * (The firmware could have used it, and left it running). 1221 */ 1222 gfar_halt(priv); 1223 1224 gfar_mac_reset(priv); 1225 1226 /* Zero out the rmon mib registers if it has them */ 1227 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { 1228 memset_io(&(regs->rmon), 0, sizeof(struct rmon_mib)); 1229 1230 /* Mask off the CAM interrupts */ 1231 gfar_write(®s->rmon.cam1, 0xffffffff); 1232 gfar_write(®s->rmon.cam2, 0xffffffff); 1233 } 1234 1235 /* Initialize ECNTRL */ 1236 gfar_write(®s->ecntrl, ECNTRL_INIT_SETTINGS); 1237 1238 /* Set the extraction length and index */ 1239 attrs = ATTRELI_EL(priv->rx_stash_size) | 1240 ATTRELI_EI(priv->rx_stash_index); 1241 1242 gfar_write(®s->attreli, attrs); 1243 1244 /* Start with defaults, and add stashing 1245 * depending on driver parameters 1246 */ 1247 attrs = ATTR_INIT_SETTINGS; 1248 1249 if (priv->bd_stash_en) 1250 attrs |= ATTR_BDSTASH; 1251 1252 if (priv->rx_stash_size != 0) 1253 attrs |= ATTR_BUFSTASH; 1254 1255 gfar_write(®s->attr, attrs); 1256 1257 /* FIFO configs */ 1258 gfar_write(®s->fifo_tx_thr, DEFAULT_FIFO_TX_THR); 1259 gfar_write(®s->fifo_tx_starve, DEFAULT_FIFO_TX_STARVE); 1260 gfar_write(®s->fifo_tx_starve_shutoff, DEFAULT_FIFO_TX_STARVE_OFF); 1261 1262 /* Program the interrupt steering regs, only for MG devices */ 1263 if (priv->num_grps > 1) 1264 gfar_write_isrg(priv); 1265 } 1266 1267 static void gfar_init_addr_hash_table(struct gfar_private *priv) 1268 { 1269 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1270 1271 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { 1272 priv->extended_hash = 1; 1273 priv->hash_width = 9; 1274 1275 priv->hash_regs[0] = ®s->igaddr0; 1276 priv->hash_regs[1] = ®s->igaddr1; 1277 priv->hash_regs[2] = ®s->igaddr2; 1278 priv->hash_regs[3] = ®s->igaddr3; 1279 priv->hash_regs[4] = ®s->igaddr4; 1280 priv->hash_regs[5] = ®s->igaddr5; 1281 priv->hash_regs[6] = ®s->igaddr6; 1282 priv->hash_regs[7] = ®s->igaddr7; 1283 priv->hash_regs[8] = ®s->gaddr0; 1284 priv->hash_regs[9] = ®s->gaddr1; 1285 priv->hash_regs[10] = ®s->gaddr2; 1286 priv->hash_regs[11] = ®s->gaddr3; 1287 priv->hash_regs[12] = ®s->gaddr4; 1288 priv->hash_regs[13] = ®s->gaddr5; 1289 priv->hash_regs[14] = ®s->gaddr6; 1290 priv->hash_regs[15] = ®s->gaddr7; 1291 1292 } else { 1293 priv->extended_hash = 0; 1294 priv->hash_width = 8; 1295 1296 priv->hash_regs[0] = ®s->gaddr0; 1297 priv->hash_regs[1] = ®s->gaddr1; 1298 priv->hash_regs[2] = ®s->gaddr2; 1299 priv->hash_regs[3] = ®s->gaddr3; 1300 priv->hash_regs[4] = ®s->gaddr4; 1301 priv->hash_regs[5] = ®s->gaddr5; 1302 priv->hash_regs[6] = ®s->gaddr6; 1303 priv->hash_regs[7] = ®s->gaddr7; 1304 } 1305 } 1306 1307 /* Set up the ethernet device structure, private data, 1308 * and anything else we need before we start 1309 */ 1310 static int gfar_probe(struct platform_device *ofdev) 1311 { 1312 struct net_device *dev = NULL; 1313 struct gfar_private *priv = NULL; 1314 int err = 0, i; 1315 1316 err = gfar_of_init(ofdev, &dev); 1317 1318 if (err) 1319 return err; 1320 1321 priv = netdev_priv(dev); 1322 priv->ndev = dev; 1323 priv->ofdev = ofdev; 1324 priv->dev = &ofdev->dev; 1325 SET_NETDEV_DEV(dev, &ofdev->dev); 1326 1327 INIT_WORK(&priv->reset_task, gfar_reset_task); 1328 1329 platform_set_drvdata(ofdev, priv); 1330 1331 gfar_detect_errata(priv); 1332 1333 /* Set the dev->base_addr to the gfar reg region */ 1334 dev->base_addr = (unsigned long) priv->gfargrp[0].regs; 1335 1336 /* Fill in the dev structure */ 1337 dev->watchdog_timeo = TX_TIMEOUT; 1338 dev->mtu = 1500; 1339 dev->netdev_ops = &gfar_netdev_ops; 1340 dev->ethtool_ops = &gfar_ethtool_ops; 1341 1342 /* Register for napi ...We are registering NAPI for each grp */ 1343 for (i = 0; i < priv->num_grps; i++) { 1344 if (priv->poll_mode == GFAR_SQ_POLLING) { 1345 netif_napi_add(dev, &priv->gfargrp[i].napi_rx, 1346 gfar_poll_rx_sq, GFAR_DEV_WEIGHT); 1347 netif_napi_add(dev, &priv->gfargrp[i].napi_tx, 1348 gfar_poll_tx_sq, 2); 1349 } else { 1350 netif_napi_add(dev, &priv->gfargrp[i].napi_rx, 1351 gfar_poll_rx, GFAR_DEV_WEIGHT); 1352 netif_napi_add(dev, &priv->gfargrp[i].napi_tx, 1353 gfar_poll_tx, 2); 1354 } 1355 } 1356 1357 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { 1358 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | 1359 NETIF_F_RXCSUM; 1360 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | 1361 NETIF_F_RXCSUM | NETIF_F_HIGHDMA; 1362 } 1363 1364 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) { 1365 dev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX | 1366 NETIF_F_HW_VLAN_CTAG_RX; 1367 dev->features |= NETIF_F_HW_VLAN_CTAG_RX; 1368 } 1369 1370 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; 1371 1372 gfar_init_addr_hash_table(priv); 1373 1374 /* Insert receive time stamps into padding alignment bytes */ 1375 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) 1376 priv->padding = 8; 1377 1378 if (dev->features & NETIF_F_IP_CSUM || 1379 priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) 1380 dev->needed_headroom = GMAC_FCB_LEN; 1381 1382 /* Initializing some of the rx/tx queue level parameters */ 1383 for (i = 0; i < priv->num_tx_queues; i++) { 1384 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE; 1385 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE; 1386 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE; 1387 priv->tx_queue[i]->txic = DEFAULT_TXIC; 1388 } 1389 1390 for (i = 0; i < priv->num_rx_queues; i++) { 1391 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE; 1392 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE; 1393 priv->rx_queue[i]->rxic = DEFAULT_RXIC; 1394 } 1395 1396 /* always enable rx filer */ 1397 priv->rx_filer_enable = 1; 1398 /* Enable most messages by default */ 1399 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; 1400 /* use pritority h/w tx queue scheduling for single queue devices */ 1401 if (priv->num_tx_queues == 1) 1402 priv->prio_sched_en = 1; 1403 1404 set_bit(GFAR_DOWN, &priv->state); 1405 1406 gfar_hw_init(priv); 1407 1408 /* Carrier starts down, phylib will bring it up */ 1409 netif_carrier_off(dev); 1410 1411 err = register_netdev(dev); 1412 1413 if (err) { 1414 pr_err("%s: Cannot register net device, aborting\n", dev->name); 1415 goto register_fail; 1416 } 1417 1418 device_set_wakeup_capable(&dev->dev, priv->device_flags & 1419 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); 1420 1421 /* fill out IRQ number and name fields */ 1422 for (i = 0; i < priv->num_grps; i++) { 1423 struct gfar_priv_grp *grp = &priv->gfargrp[i]; 1424 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { 1425 sprintf(gfar_irq(grp, TX)->name, "%s%s%c%s", 1426 dev->name, "_g", '0' + i, "_tx"); 1427 sprintf(gfar_irq(grp, RX)->name, "%s%s%c%s", 1428 dev->name, "_g", '0' + i, "_rx"); 1429 sprintf(gfar_irq(grp, ER)->name, "%s%s%c%s", 1430 dev->name, "_g", '0' + i, "_er"); 1431 } else 1432 strcpy(gfar_irq(grp, TX)->name, dev->name); 1433 } 1434 1435 /* Initialize the filer table */ 1436 gfar_init_filer_table(priv); 1437 1438 /* Print out the device info */ 1439 netdev_info(dev, "mac: %pM\n", dev->dev_addr); 1440 1441 /* Even more device info helps when determining which kernel 1442 * provided which set of benchmarks. 1443 */ 1444 netdev_info(dev, "Running with NAPI enabled\n"); 1445 for (i = 0; i < priv->num_rx_queues; i++) 1446 netdev_info(dev, "RX BD ring size for Q[%d]: %d\n", 1447 i, priv->rx_queue[i]->rx_ring_size); 1448 for (i = 0; i < priv->num_tx_queues; i++) 1449 netdev_info(dev, "TX BD ring size for Q[%d]: %d\n", 1450 i, priv->tx_queue[i]->tx_ring_size); 1451 1452 return 0; 1453 1454 register_fail: 1455 unmap_group_regs(priv); 1456 gfar_free_rx_queues(priv); 1457 gfar_free_tx_queues(priv); 1458 of_node_put(priv->phy_node); 1459 of_node_put(priv->tbi_node); 1460 free_gfar_dev(priv); 1461 return err; 1462 } 1463 1464 static int gfar_remove(struct platform_device *ofdev) 1465 { 1466 struct gfar_private *priv = platform_get_drvdata(ofdev); 1467 1468 of_node_put(priv->phy_node); 1469 of_node_put(priv->tbi_node); 1470 1471 unregister_netdev(priv->ndev); 1472 unmap_group_regs(priv); 1473 gfar_free_rx_queues(priv); 1474 gfar_free_tx_queues(priv); 1475 free_gfar_dev(priv); 1476 1477 return 0; 1478 } 1479 1480 #ifdef CONFIG_PM 1481 1482 static int gfar_suspend(struct device *dev) 1483 { 1484 struct gfar_private *priv = dev_get_drvdata(dev); 1485 struct net_device *ndev = priv->ndev; 1486 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1487 u32 tempval; 1488 int magic_packet = priv->wol_en && 1489 (priv->device_flags & 1490 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); 1491 1492 if (!netif_running(ndev)) 1493 return 0; 1494 1495 disable_napi(priv); 1496 netif_tx_lock(ndev); 1497 netif_device_detach(ndev); 1498 netif_tx_unlock(ndev); 1499 1500 gfar_halt(priv); 1501 1502 if (magic_packet) { 1503 /* Enable interrupt on Magic Packet */ 1504 gfar_write(®s->imask, IMASK_MAG); 1505 1506 /* Enable Magic Packet mode */ 1507 tempval = gfar_read(®s->maccfg2); 1508 tempval |= MACCFG2_MPEN; 1509 gfar_write(®s->maccfg2, tempval); 1510 1511 /* re-enable the Rx block */ 1512 tempval = gfar_read(®s->maccfg1); 1513 tempval |= MACCFG1_RX_EN; 1514 gfar_write(®s->maccfg1, tempval); 1515 1516 } else { 1517 phy_stop(priv->phydev); 1518 } 1519 1520 return 0; 1521 } 1522 1523 static int gfar_resume(struct device *dev) 1524 { 1525 struct gfar_private *priv = dev_get_drvdata(dev); 1526 struct net_device *ndev = priv->ndev; 1527 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1528 u32 tempval; 1529 int magic_packet = priv->wol_en && 1530 (priv->device_flags & 1531 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); 1532 1533 if (!netif_running(ndev)) 1534 return 0; 1535 1536 if (magic_packet) { 1537 /* Disable Magic Packet mode */ 1538 tempval = gfar_read(®s->maccfg2); 1539 tempval &= ~MACCFG2_MPEN; 1540 gfar_write(®s->maccfg2, tempval); 1541 } else { 1542 phy_start(priv->phydev); 1543 } 1544 1545 gfar_start(priv); 1546 1547 netif_device_attach(ndev); 1548 enable_napi(priv); 1549 1550 return 0; 1551 } 1552 1553 static int gfar_restore(struct device *dev) 1554 { 1555 struct gfar_private *priv = dev_get_drvdata(dev); 1556 struct net_device *ndev = priv->ndev; 1557 1558 if (!netif_running(ndev)) { 1559 netif_device_attach(ndev); 1560 1561 return 0; 1562 } 1563 1564 gfar_init_bds(ndev); 1565 1566 gfar_mac_reset(priv); 1567 1568 gfar_init_tx_rx_base(priv); 1569 1570 gfar_start(priv); 1571 1572 priv->oldlink = 0; 1573 priv->oldspeed = 0; 1574 priv->oldduplex = -1; 1575 1576 if (priv->phydev) 1577 phy_start(priv->phydev); 1578 1579 netif_device_attach(ndev); 1580 enable_napi(priv); 1581 1582 return 0; 1583 } 1584 1585 static struct dev_pm_ops gfar_pm_ops = { 1586 .suspend = gfar_suspend, 1587 .resume = gfar_resume, 1588 .freeze = gfar_suspend, 1589 .thaw = gfar_resume, 1590 .restore = gfar_restore, 1591 }; 1592 1593 #define GFAR_PM_OPS (&gfar_pm_ops) 1594 1595 #else 1596 1597 #define GFAR_PM_OPS NULL 1598 1599 #endif 1600 1601 /* Reads the controller's registers to determine what interface 1602 * connects it to the PHY. 1603 */ 1604 static phy_interface_t gfar_get_interface(struct net_device *dev) 1605 { 1606 struct gfar_private *priv = netdev_priv(dev); 1607 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1608 u32 ecntrl; 1609 1610 ecntrl = gfar_read(®s->ecntrl); 1611 1612 if (ecntrl & ECNTRL_SGMII_MODE) 1613 return PHY_INTERFACE_MODE_SGMII; 1614 1615 if (ecntrl & ECNTRL_TBI_MODE) { 1616 if (ecntrl & ECNTRL_REDUCED_MODE) 1617 return PHY_INTERFACE_MODE_RTBI; 1618 else 1619 return PHY_INTERFACE_MODE_TBI; 1620 } 1621 1622 if (ecntrl & ECNTRL_REDUCED_MODE) { 1623 if (ecntrl & ECNTRL_REDUCED_MII_MODE) { 1624 return PHY_INTERFACE_MODE_RMII; 1625 } 1626 else { 1627 phy_interface_t interface = priv->interface; 1628 1629 /* This isn't autodetected right now, so it must 1630 * be set by the device tree or platform code. 1631 */ 1632 if (interface == PHY_INTERFACE_MODE_RGMII_ID) 1633 return PHY_INTERFACE_MODE_RGMII_ID; 1634 1635 return PHY_INTERFACE_MODE_RGMII; 1636 } 1637 } 1638 1639 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) 1640 return PHY_INTERFACE_MODE_GMII; 1641 1642 return PHY_INTERFACE_MODE_MII; 1643 } 1644 1645 1646 /* Initializes driver's PHY state, and attaches to the PHY. 1647 * Returns 0 on success. 1648 */ 1649 static int init_phy(struct net_device *dev) 1650 { 1651 struct gfar_private *priv = netdev_priv(dev); 1652 uint gigabit_support = 1653 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? 1654 GFAR_SUPPORTED_GBIT : 0; 1655 phy_interface_t interface; 1656 1657 priv->oldlink = 0; 1658 priv->oldspeed = 0; 1659 priv->oldduplex = -1; 1660 1661 interface = gfar_get_interface(dev); 1662 1663 priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0, 1664 interface); 1665 if (!priv->phydev) { 1666 dev_err(&dev->dev, "could not attach to PHY\n"); 1667 return -ENODEV; 1668 } 1669 1670 if (interface == PHY_INTERFACE_MODE_SGMII) 1671 gfar_configure_serdes(dev); 1672 1673 /* Remove any features not supported by the controller */ 1674 priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support); 1675 priv->phydev->advertising = priv->phydev->supported; 1676 1677 /* Add support for flow control, but don't advertise it by default */ 1678 priv->phydev->supported |= (SUPPORTED_Pause | SUPPORTED_Asym_Pause); 1679 1680 return 0; 1681 } 1682 1683 /* Initialize TBI PHY interface for communicating with the 1684 * SERDES lynx PHY on the chip. We communicate with this PHY 1685 * through the MDIO bus on each controller, treating it as a 1686 * "normal" PHY at the address found in the TBIPA register. We assume 1687 * that the TBIPA register is valid. Either the MDIO bus code will set 1688 * it to a value that doesn't conflict with other PHYs on the bus, or the 1689 * value doesn't matter, as there are no other PHYs on the bus. 1690 */ 1691 static void gfar_configure_serdes(struct net_device *dev) 1692 { 1693 struct gfar_private *priv = netdev_priv(dev); 1694 struct phy_device *tbiphy; 1695 1696 if (!priv->tbi_node) { 1697 dev_warn(&dev->dev, "error: SGMII mode requires that the " 1698 "device tree specify a tbi-handle\n"); 1699 return; 1700 } 1701 1702 tbiphy = of_phy_find_device(priv->tbi_node); 1703 if (!tbiphy) { 1704 dev_err(&dev->dev, "error: Could not get TBI device\n"); 1705 return; 1706 } 1707 1708 /* If the link is already up, we must already be ok, and don't need to 1709 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured 1710 * everything for us? Resetting it takes the link down and requires 1711 * several seconds for it to come back. 1712 */ 1713 if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS) 1714 return; 1715 1716 /* Single clk mode, mii mode off(for serdes communication) */ 1717 phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT); 1718 1719 phy_write(tbiphy, MII_ADVERTISE, 1720 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | 1721 ADVERTISE_1000XPSE_ASYM); 1722 1723 phy_write(tbiphy, MII_BMCR, 1724 BMCR_ANENABLE | BMCR_ANRESTART | BMCR_FULLDPLX | 1725 BMCR_SPEED1000); 1726 } 1727 1728 static int __gfar_is_rx_idle(struct gfar_private *priv) 1729 { 1730 u32 res; 1731 1732 /* Normaly TSEC should not hang on GRS commands, so we should 1733 * actually wait for IEVENT_GRSC flag. 1734 */ 1735 if (!gfar_has_errata(priv, GFAR_ERRATA_A002)) 1736 return 0; 1737 1738 /* Read the eTSEC register at offset 0xD1C. If bits 7-14 are 1739 * the same as bits 23-30, the eTSEC Rx is assumed to be idle 1740 * and the Rx can be safely reset. 1741 */ 1742 res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c); 1743 res &= 0x7f807f80; 1744 if ((res & 0xffff) == (res >> 16)) 1745 return 1; 1746 1747 return 0; 1748 } 1749 1750 /* Halt the receive and transmit queues */ 1751 static void gfar_halt_nodisable(struct gfar_private *priv) 1752 { 1753 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1754 u32 tempval; 1755 unsigned int timeout; 1756 int stopped; 1757 1758 gfar_ints_disable(priv); 1759 1760 if (gfar_is_dma_stopped(priv)) 1761 return; 1762 1763 /* Stop the DMA, and wait for it to stop */ 1764 tempval = gfar_read(®s->dmactrl); 1765 tempval |= (DMACTRL_GRS | DMACTRL_GTS); 1766 gfar_write(®s->dmactrl, tempval); 1767 1768 retry: 1769 timeout = 1000; 1770 while (!(stopped = gfar_is_dma_stopped(priv)) && timeout) { 1771 cpu_relax(); 1772 timeout--; 1773 } 1774 1775 if (!timeout) 1776 stopped = gfar_is_dma_stopped(priv); 1777 1778 if (!stopped && !gfar_is_rx_dma_stopped(priv) && 1779 !__gfar_is_rx_idle(priv)) 1780 goto retry; 1781 } 1782 1783 /* Halt the receive and transmit queues */ 1784 void gfar_halt(struct gfar_private *priv) 1785 { 1786 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1787 u32 tempval; 1788 1789 /* Dissable the Rx/Tx hw queues */ 1790 gfar_write(®s->rqueue, 0); 1791 gfar_write(®s->tqueue, 0); 1792 1793 mdelay(10); 1794 1795 gfar_halt_nodisable(priv); 1796 1797 /* Disable Rx/Tx DMA */ 1798 tempval = gfar_read(®s->maccfg1); 1799 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); 1800 gfar_write(®s->maccfg1, tempval); 1801 } 1802 1803 void stop_gfar(struct net_device *dev) 1804 { 1805 struct gfar_private *priv = netdev_priv(dev); 1806 1807 netif_tx_stop_all_queues(dev); 1808 1809 smp_mb__before_atomic(); 1810 set_bit(GFAR_DOWN, &priv->state); 1811 smp_mb__after_atomic(); 1812 1813 disable_napi(priv); 1814 1815 /* disable ints and gracefully shut down Rx/Tx DMA */ 1816 gfar_halt(priv); 1817 1818 phy_stop(priv->phydev); 1819 1820 free_skb_resources(priv); 1821 } 1822 1823 static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue) 1824 { 1825 struct txbd8 *txbdp; 1826 struct gfar_private *priv = netdev_priv(tx_queue->dev); 1827 int i, j; 1828 1829 txbdp = tx_queue->tx_bd_base; 1830 1831 for (i = 0; i < tx_queue->tx_ring_size; i++) { 1832 if (!tx_queue->tx_skbuff[i]) 1833 continue; 1834 1835 dma_unmap_single(priv->dev, be32_to_cpu(txbdp->bufPtr), 1836 be16_to_cpu(txbdp->length), DMA_TO_DEVICE); 1837 txbdp->lstatus = 0; 1838 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags; 1839 j++) { 1840 txbdp++; 1841 dma_unmap_page(priv->dev, be32_to_cpu(txbdp->bufPtr), 1842 be16_to_cpu(txbdp->length), 1843 DMA_TO_DEVICE); 1844 } 1845 txbdp++; 1846 dev_kfree_skb_any(tx_queue->tx_skbuff[i]); 1847 tx_queue->tx_skbuff[i] = NULL; 1848 } 1849 kfree(tx_queue->tx_skbuff); 1850 tx_queue->tx_skbuff = NULL; 1851 } 1852 1853 static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue) 1854 { 1855 int i; 1856 1857 struct rxbd8 *rxbdp = rx_queue->rx_bd_base; 1858 1859 if (rx_queue->skb) 1860 dev_kfree_skb(rx_queue->skb); 1861 1862 for (i = 0; i < rx_queue->rx_ring_size; i++) { 1863 struct gfar_rx_buff *rxb = &rx_queue->rx_buff[i]; 1864 1865 rxbdp->lstatus = 0; 1866 rxbdp->bufPtr = 0; 1867 rxbdp++; 1868 1869 if (!rxb->page) 1870 continue; 1871 1872 dma_unmap_single(rx_queue->dev, rxb->dma, 1873 PAGE_SIZE, DMA_FROM_DEVICE); 1874 __free_page(rxb->page); 1875 1876 rxb->page = NULL; 1877 } 1878 1879 kfree(rx_queue->rx_buff); 1880 rx_queue->rx_buff = NULL; 1881 } 1882 1883 /* If there are any tx skbs or rx skbs still around, free them. 1884 * Then free tx_skbuff and rx_skbuff 1885 */ 1886 static void free_skb_resources(struct gfar_private *priv) 1887 { 1888 struct gfar_priv_tx_q *tx_queue = NULL; 1889 struct gfar_priv_rx_q *rx_queue = NULL; 1890 int i; 1891 1892 /* Go through all the buffer descriptors and free their data buffers */ 1893 for (i = 0; i < priv->num_tx_queues; i++) { 1894 struct netdev_queue *txq; 1895 1896 tx_queue = priv->tx_queue[i]; 1897 txq = netdev_get_tx_queue(tx_queue->dev, tx_queue->qindex); 1898 if (tx_queue->tx_skbuff) 1899 free_skb_tx_queue(tx_queue); 1900 netdev_tx_reset_queue(txq); 1901 } 1902 1903 for (i = 0; i < priv->num_rx_queues; i++) { 1904 rx_queue = priv->rx_queue[i]; 1905 if (rx_queue->rx_buff) 1906 free_skb_rx_queue(rx_queue); 1907 } 1908 1909 dma_free_coherent(priv->dev, 1910 sizeof(struct txbd8) * priv->total_tx_ring_size + 1911 sizeof(struct rxbd8) * priv->total_rx_ring_size, 1912 priv->tx_queue[0]->tx_bd_base, 1913 priv->tx_queue[0]->tx_bd_dma_base); 1914 } 1915 1916 void gfar_start(struct gfar_private *priv) 1917 { 1918 struct gfar __iomem *regs = priv->gfargrp[0].regs; 1919 u32 tempval; 1920 int i = 0; 1921 1922 /* Enable Rx/Tx hw queues */ 1923 gfar_write(®s->rqueue, priv->rqueue); 1924 gfar_write(®s->tqueue, priv->tqueue); 1925 1926 /* Initialize DMACTRL to have WWR and WOP */ 1927 tempval = gfar_read(®s->dmactrl); 1928 tempval |= DMACTRL_INIT_SETTINGS; 1929 gfar_write(®s->dmactrl, tempval); 1930 1931 /* Make sure we aren't stopped */ 1932 tempval = gfar_read(®s->dmactrl); 1933 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); 1934 gfar_write(®s->dmactrl, tempval); 1935 1936 for (i = 0; i < priv->num_grps; i++) { 1937 regs = priv->gfargrp[i].regs; 1938 /* Clear THLT/RHLT, so that the DMA starts polling now */ 1939 gfar_write(®s->tstat, priv->gfargrp[i].tstat); 1940 gfar_write(®s->rstat, priv->gfargrp[i].rstat); 1941 } 1942 1943 /* Enable Rx/Tx DMA */ 1944 tempval = gfar_read(®s->maccfg1); 1945 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); 1946 gfar_write(®s->maccfg1, tempval); 1947 1948 gfar_ints_enable(priv); 1949 1950 priv->ndev->trans_start = jiffies; /* prevent tx timeout */ 1951 } 1952 1953 static void free_grp_irqs(struct gfar_priv_grp *grp) 1954 { 1955 free_irq(gfar_irq(grp, TX)->irq, grp); 1956 free_irq(gfar_irq(grp, RX)->irq, grp); 1957 free_irq(gfar_irq(grp, ER)->irq, grp); 1958 } 1959 1960 static int register_grp_irqs(struct gfar_priv_grp *grp) 1961 { 1962 struct gfar_private *priv = grp->priv; 1963 struct net_device *dev = priv->ndev; 1964 int err; 1965 1966 /* If the device has multiple interrupts, register for 1967 * them. Otherwise, only register for the one 1968 */ 1969 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { 1970 /* Install our interrupt handlers for Error, 1971 * Transmit, and Receive 1972 */ 1973 err = request_irq(gfar_irq(grp, ER)->irq, gfar_error, 1974 IRQF_NO_SUSPEND, 1975 gfar_irq(grp, ER)->name, grp); 1976 if (err < 0) { 1977 netif_err(priv, intr, dev, "Can't get IRQ %d\n", 1978 gfar_irq(grp, ER)->irq); 1979 1980 goto err_irq_fail; 1981 } 1982 err = request_irq(gfar_irq(grp, TX)->irq, gfar_transmit, 0, 1983 gfar_irq(grp, TX)->name, grp); 1984 if (err < 0) { 1985 netif_err(priv, intr, dev, "Can't get IRQ %d\n", 1986 gfar_irq(grp, TX)->irq); 1987 goto tx_irq_fail; 1988 } 1989 err = request_irq(gfar_irq(grp, RX)->irq, gfar_receive, 0, 1990 gfar_irq(grp, RX)->name, grp); 1991 if (err < 0) { 1992 netif_err(priv, intr, dev, "Can't get IRQ %d\n", 1993 gfar_irq(grp, RX)->irq); 1994 goto rx_irq_fail; 1995 } 1996 } else { 1997 err = request_irq(gfar_irq(grp, TX)->irq, gfar_interrupt, 1998 IRQF_NO_SUSPEND, 1999 gfar_irq(grp, TX)->name, grp); 2000 if (err < 0) { 2001 netif_err(priv, intr, dev, "Can't get IRQ %d\n", 2002 gfar_irq(grp, TX)->irq); 2003 goto err_irq_fail; 2004 } 2005 } 2006 2007 return 0; 2008 2009 rx_irq_fail: 2010 free_irq(gfar_irq(grp, TX)->irq, grp); 2011 tx_irq_fail: 2012 free_irq(gfar_irq(grp, ER)->irq, grp); 2013 err_irq_fail: 2014 return err; 2015 2016 } 2017 2018 static void gfar_free_irq(struct gfar_private *priv) 2019 { 2020 int i; 2021 2022 /* Free the IRQs */ 2023 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { 2024 for (i = 0; i < priv->num_grps; i++) 2025 free_grp_irqs(&priv->gfargrp[i]); 2026 } else { 2027 for (i = 0; i < priv->num_grps; i++) 2028 free_irq(gfar_irq(&priv->gfargrp[i], TX)->irq, 2029 &priv->gfargrp[i]); 2030 } 2031 } 2032 2033 static int gfar_request_irq(struct gfar_private *priv) 2034 { 2035 int err, i, j; 2036 2037 for (i = 0; i < priv->num_grps; i++) { 2038 err = register_grp_irqs(&priv->gfargrp[i]); 2039 if (err) { 2040 for (j = 0; j < i; j++) 2041 free_grp_irqs(&priv->gfargrp[j]); 2042 return err; 2043 } 2044 } 2045 2046 return 0; 2047 } 2048 2049 /* Bring the controller up and running */ 2050 int startup_gfar(struct net_device *ndev) 2051 { 2052 struct gfar_private *priv = netdev_priv(ndev); 2053 int err; 2054 2055 gfar_mac_reset(priv); 2056 2057 err = gfar_alloc_skb_resources(ndev); 2058 if (err) 2059 return err; 2060 2061 gfar_init_tx_rx_base(priv); 2062 2063 smp_mb__before_atomic(); 2064 clear_bit(GFAR_DOWN, &priv->state); 2065 smp_mb__after_atomic(); 2066 2067 /* Start Rx/Tx DMA and enable the interrupts */ 2068 gfar_start(priv); 2069 2070 phy_start(priv->phydev); 2071 2072 enable_napi(priv); 2073 2074 netif_tx_wake_all_queues(ndev); 2075 2076 return 0; 2077 } 2078 2079 /* Called when something needs to use the ethernet device 2080 * Returns 0 for success. 2081 */ 2082 static int gfar_enet_open(struct net_device *dev) 2083 { 2084 struct gfar_private *priv = netdev_priv(dev); 2085 int err; 2086 2087 err = init_phy(dev); 2088 if (err) 2089 return err; 2090 2091 err = gfar_request_irq(priv); 2092 if (err) 2093 return err; 2094 2095 err = startup_gfar(dev); 2096 if (err) 2097 return err; 2098 2099 return err; 2100 } 2101 2102 static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb) 2103 { 2104 struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN); 2105 2106 memset(fcb, 0, GMAC_FCB_LEN); 2107 2108 return fcb; 2109 } 2110 2111 static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb, 2112 int fcb_length) 2113 { 2114 /* If we're here, it's a IP packet with a TCP or UDP 2115 * payload. We set it to checksum, using a pseudo-header 2116 * we provide 2117 */ 2118 u8 flags = TXFCB_DEFAULT; 2119 2120 /* Tell the controller what the protocol is 2121 * And provide the already calculated phcs 2122 */ 2123 if (ip_hdr(skb)->protocol == IPPROTO_UDP) { 2124 flags |= TXFCB_UDP; 2125 fcb->phcs = (__force __be16)(udp_hdr(skb)->check); 2126 } else 2127 fcb->phcs = (__force __be16)(tcp_hdr(skb)->check); 2128 2129 /* l3os is the distance between the start of the 2130 * frame (skb->data) and the start of the IP hdr. 2131 * l4os is the distance between the start of the 2132 * l3 hdr and the l4 hdr 2133 */ 2134 fcb->l3os = (u8)(skb_network_offset(skb) - fcb_length); 2135 fcb->l4os = skb_network_header_len(skb); 2136 2137 fcb->flags = flags; 2138 } 2139 2140 void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) 2141 { 2142 fcb->flags |= TXFCB_VLN; 2143 fcb->vlctl = cpu_to_be16(skb_vlan_tag_get(skb)); 2144 } 2145 2146 static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride, 2147 struct txbd8 *base, int ring_size) 2148 { 2149 struct txbd8 *new_bd = bdp + stride; 2150 2151 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd; 2152 } 2153 2154 static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base, 2155 int ring_size) 2156 { 2157 return skip_txbd(bdp, 1, base, ring_size); 2158 } 2159 2160 /* eTSEC12: csum generation not supported for some fcb offsets */ 2161 static inline bool gfar_csum_errata_12(struct gfar_private *priv, 2162 unsigned long fcb_addr) 2163 { 2164 return (gfar_has_errata(priv, GFAR_ERRATA_12) && 2165 (fcb_addr % 0x20) > 0x18); 2166 } 2167 2168 /* eTSEC76: csum generation for frames larger than 2500 may 2169 * cause excess delays before start of transmission 2170 */ 2171 static inline bool gfar_csum_errata_76(struct gfar_private *priv, 2172 unsigned int len) 2173 { 2174 return (gfar_has_errata(priv, GFAR_ERRATA_76) && 2175 (len > 2500)); 2176 } 2177 2178 /* This is called by the kernel when a frame is ready for transmission. 2179 * It is pointed to by the dev->hard_start_xmit function pointer 2180 */ 2181 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) 2182 { 2183 struct gfar_private *priv = netdev_priv(dev); 2184 struct gfar_priv_tx_q *tx_queue = NULL; 2185 struct netdev_queue *txq; 2186 struct gfar __iomem *regs = NULL; 2187 struct txfcb *fcb = NULL; 2188 struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL; 2189 u32 lstatus; 2190 int i, rq = 0; 2191 int do_tstamp, do_csum, do_vlan; 2192 u32 bufaddr; 2193 unsigned int nr_frags, nr_txbds, bytes_sent, fcb_len = 0; 2194 2195 rq = skb->queue_mapping; 2196 tx_queue = priv->tx_queue[rq]; 2197 txq = netdev_get_tx_queue(dev, rq); 2198 base = tx_queue->tx_bd_base; 2199 regs = tx_queue->grp->regs; 2200 2201 do_csum = (CHECKSUM_PARTIAL == skb->ip_summed); 2202 do_vlan = skb_vlan_tag_present(skb); 2203 do_tstamp = (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 2204 priv->hwts_tx_en; 2205 2206 if (do_csum || do_vlan) 2207 fcb_len = GMAC_FCB_LEN; 2208 2209 /* check if time stamp should be generated */ 2210 if (unlikely(do_tstamp)) 2211 fcb_len = GMAC_FCB_LEN + GMAC_TXPAL_LEN; 2212 2213 /* make space for additional header when fcb is needed */ 2214 if (fcb_len && unlikely(skb_headroom(skb) < fcb_len)) { 2215 struct sk_buff *skb_new; 2216 2217 skb_new = skb_realloc_headroom(skb, fcb_len); 2218 if (!skb_new) { 2219 dev->stats.tx_errors++; 2220 dev_kfree_skb_any(skb); 2221 return NETDEV_TX_OK; 2222 } 2223 2224 if (skb->sk) 2225 skb_set_owner_w(skb_new, skb->sk); 2226 dev_consume_skb_any(skb); 2227 skb = skb_new; 2228 } 2229 2230 /* total number of fragments in the SKB */ 2231 nr_frags = skb_shinfo(skb)->nr_frags; 2232 2233 /* calculate the required number of TxBDs for this skb */ 2234 if (unlikely(do_tstamp)) 2235 nr_txbds = nr_frags + 2; 2236 else 2237 nr_txbds = nr_frags + 1; 2238 2239 /* check if there is space to queue this packet */ 2240 if (nr_txbds > tx_queue->num_txbdfree) { 2241 /* no space, stop the queue */ 2242 netif_tx_stop_queue(txq); 2243 dev->stats.tx_fifo_errors++; 2244 return NETDEV_TX_BUSY; 2245 } 2246 2247 /* Update transmit stats */ 2248 bytes_sent = skb->len; 2249 tx_queue->stats.tx_bytes += bytes_sent; 2250 /* keep Tx bytes on wire for BQL accounting */ 2251 GFAR_CB(skb)->bytes_sent = bytes_sent; 2252 tx_queue->stats.tx_packets++; 2253 2254 txbdp = txbdp_start = tx_queue->cur_tx; 2255 lstatus = be32_to_cpu(txbdp->lstatus); 2256 2257 /* Time stamp insertion requires one additional TxBD */ 2258 if (unlikely(do_tstamp)) 2259 txbdp_tstamp = txbdp = next_txbd(txbdp, base, 2260 tx_queue->tx_ring_size); 2261 2262 if (nr_frags == 0) { 2263 if (unlikely(do_tstamp)) { 2264 u32 lstatus_ts = be32_to_cpu(txbdp_tstamp->lstatus); 2265 2266 lstatus_ts |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); 2267 txbdp_tstamp->lstatus = cpu_to_be32(lstatus_ts); 2268 } else { 2269 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); 2270 } 2271 } else { 2272 /* Place the fragment addresses and lengths into the TxBDs */ 2273 for (i = 0; i < nr_frags; i++) { 2274 unsigned int frag_len; 2275 /* Point at the next BD, wrapping as needed */ 2276 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size); 2277 2278 frag_len = skb_shinfo(skb)->frags[i].size; 2279 2280 lstatus = be32_to_cpu(txbdp->lstatus) | frag_len | 2281 BD_LFLAG(TXBD_READY); 2282 2283 /* Handle the last BD specially */ 2284 if (i == nr_frags - 1) 2285 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); 2286 2287 bufaddr = skb_frag_dma_map(priv->dev, 2288 &skb_shinfo(skb)->frags[i], 2289 0, 2290 frag_len, 2291 DMA_TO_DEVICE); 2292 if (unlikely(dma_mapping_error(priv->dev, bufaddr))) 2293 goto dma_map_err; 2294 2295 /* set the TxBD length and buffer pointer */ 2296 txbdp->bufPtr = cpu_to_be32(bufaddr); 2297 txbdp->lstatus = cpu_to_be32(lstatus); 2298 } 2299 2300 lstatus = be32_to_cpu(txbdp_start->lstatus); 2301 } 2302 2303 /* Add TxPAL between FCB and frame if required */ 2304 if (unlikely(do_tstamp)) { 2305 skb_push(skb, GMAC_TXPAL_LEN); 2306 memset(skb->data, 0, GMAC_TXPAL_LEN); 2307 } 2308 2309 /* Add TxFCB if required */ 2310 if (fcb_len) { 2311 fcb = gfar_add_fcb(skb); 2312 lstatus |= BD_LFLAG(TXBD_TOE); 2313 } 2314 2315 /* Set up checksumming */ 2316 if (do_csum) { 2317 gfar_tx_checksum(skb, fcb, fcb_len); 2318 2319 if (unlikely(gfar_csum_errata_12(priv, (unsigned long)fcb)) || 2320 unlikely(gfar_csum_errata_76(priv, skb->len))) { 2321 __skb_pull(skb, GMAC_FCB_LEN); 2322 skb_checksum_help(skb); 2323 if (do_vlan || do_tstamp) { 2324 /* put back a new fcb for vlan/tstamp TOE */ 2325 fcb = gfar_add_fcb(skb); 2326 } else { 2327 /* Tx TOE not used */ 2328 lstatus &= ~(BD_LFLAG(TXBD_TOE)); 2329 fcb = NULL; 2330 } 2331 } 2332 } 2333 2334 if (do_vlan) 2335 gfar_tx_vlan(skb, fcb); 2336 2337 /* Setup tx hardware time stamping if requested */ 2338 if (unlikely(do_tstamp)) { 2339 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 2340 fcb->ptp = 1; 2341 } 2342 2343 bufaddr = dma_map_single(priv->dev, skb->data, skb_headlen(skb), 2344 DMA_TO_DEVICE); 2345 if (unlikely(dma_mapping_error(priv->dev, bufaddr))) 2346 goto dma_map_err; 2347 2348 txbdp_start->bufPtr = cpu_to_be32(bufaddr); 2349 2350 /* If time stamping is requested one additional TxBD must be set up. The 2351 * first TxBD points to the FCB and must have a data length of 2352 * GMAC_FCB_LEN. The second TxBD points to the actual frame data with 2353 * the full frame length. 2354 */ 2355 if (unlikely(do_tstamp)) { 2356 u32 lstatus_ts = be32_to_cpu(txbdp_tstamp->lstatus); 2357 2358 bufaddr = be32_to_cpu(txbdp_start->bufPtr); 2359 bufaddr += fcb_len; 2360 lstatus_ts |= BD_LFLAG(TXBD_READY) | 2361 (skb_headlen(skb) - fcb_len); 2362 2363 txbdp_tstamp->bufPtr = cpu_to_be32(bufaddr); 2364 txbdp_tstamp->lstatus = cpu_to_be32(lstatus_ts); 2365 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN; 2366 } else { 2367 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb); 2368 } 2369 2370 netdev_tx_sent_queue(txq, bytes_sent); 2371 2372 gfar_wmb(); 2373 2374 txbdp_start->lstatus = cpu_to_be32(lstatus); 2375 2376 gfar_wmb(); /* force lstatus write before tx_skbuff */ 2377 2378 tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb; 2379 2380 /* Update the current skb pointer to the next entry we will use 2381 * (wrapping if necessary) 2382 */ 2383 tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) & 2384 TX_RING_MOD_MASK(tx_queue->tx_ring_size); 2385 2386 tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size); 2387 2388 /* We can work in parallel with gfar_clean_tx_ring(), except 2389 * when modifying num_txbdfree. Note that we didn't grab the lock 2390 * when we were reading the num_txbdfree and checking for available 2391 * space, that's because outside of this function it can only grow. 2392 */ 2393 spin_lock_bh(&tx_queue->txlock); 2394 /* reduce TxBD free count */ 2395 tx_queue->num_txbdfree -= (nr_txbds); 2396 spin_unlock_bh(&tx_queue->txlock); 2397 2398 /* If the next BD still needs to be cleaned up, then the bds 2399 * are full. We need to tell the kernel to stop sending us stuff. 2400 */ 2401 if (!tx_queue->num_txbdfree) { 2402 netif_tx_stop_queue(txq); 2403 2404 dev->stats.tx_fifo_errors++; 2405 } 2406 2407 /* Tell the DMA to go go go */ 2408 gfar_write(®s->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex); 2409 2410 return NETDEV_TX_OK; 2411 2412 dma_map_err: 2413 txbdp = next_txbd(txbdp_start, base, tx_queue->tx_ring_size); 2414 if (do_tstamp) 2415 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size); 2416 for (i = 0; i < nr_frags; i++) { 2417 lstatus = be32_to_cpu(txbdp->lstatus); 2418 if (!(lstatus & BD_LFLAG(TXBD_READY))) 2419 break; 2420 2421 lstatus &= ~BD_LFLAG(TXBD_READY); 2422 txbdp->lstatus = cpu_to_be32(lstatus); 2423 bufaddr = be32_to_cpu(txbdp->bufPtr); 2424 dma_unmap_page(priv->dev, bufaddr, be16_to_cpu(txbdp->length), 2425 DMA_TO_DEVICE); 2426 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size); 2427 } 2428 gfar_wmb(); 2429 dev_kfree_skb_any(skb); 2430 return NETDEV_TX_OK; 2431 } 2432 2433 /* Stops the kernel queue, and halts the controller */ 2434 static int gfar_close(struct net_device *dev) 2435 { 2436 struct gfar_private *priv = netdev_priv(dev); 2437 2438 cancel_work_sync(&priv->reset_task); 2439 stop_gfar(dev); 2440 2441 /* Disconnect from the PHY */ 2442 phy_disconnect(priv->phydev); 2443 priv->phydev = NULL; 2444 2445 gfar_free_irq(priv); 2446 2447 return 0; 2448 } 2449 2450 /* Changes the mac address if the controller is not running. */ 2451 static int gfar_set_mac_address(struct net_device *dev) 2452 { 2453 gfar_set_mac_for_addr(dev, 0, dev->dev_addr); 2454 2455 return 0; 2456 } 2457 2458 static int gfar_change_mtu(struct net_device *dev, int new_mtu) 2459 { 2460 struct gfar_private *priv = netdev_priv(dev); 2461 int frame_size = new_mtu + ETH_HLEN; 2462 2463 if ((frame_size < 64) || (frame_size > GFAR_JUMBO_FRAME_SIZE)) { 2464 netif_err(priv, drv, dev, "Invalid MTU setting\n"); 2465 return -EINVAL; 2466 } 2467 2468 while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state)) 2469 cpu_relax(); 2470 2471 if (dev->flags & IFF_UP) 2472 stop_gfar(dev); 2473 2474 dev->mtu = new_mtu; 2475 2476 if (dev->flags & IFF_UP) 2477 startup_gfar(dev); 2478 2479 clear_bit_unlock(GFAR_RESETTING, &priv->state); 2480 2481 return 0; 2482 } 2483 2484 void reset_gfar(struct net_device *ndev) 2485 { 2486 struct gfar_private *priv = netdev_priv(ndev); 2487 2488 while (test_and_set_bit_lock(GFAR_RESETTING, &priv->state)) 2489 cpu_relax(); 2490 2491 stop_gfar(ndev); 2492 startup_gfar(ndev); 2493 2494 clear_bit_unlock(GFAR_RESETTING, &priv->state); 2495 } 2496 2497 /* gfar_reset_task gets scheduled when a packet has not been 2498 * transmitted after a set amount of time. 2499 * For now, assume that clearing out all the structures, and 2500 * starting over will fix the problem. 2501 */ 2502 static void gfar_reset_task(struct work_struct *work) 2503 { 2504 struct gfar_private *priv = container_of(work, struct gfar_private, 2505 reset_task); 2506 reset_gfar(priv->ndev); 2507 } 2508 2509 static void gfar_timeout(struct net_device *dev) 2510 { 2511 struct gfar_private *priv = netdev_priv(dev); 2512 2513 dev->stats.tx_errors++; 2514 schedule_work(&priv->reset_task); 2515 } 2516 2517 /* Interrupt Handler for Transmit complete */ 2518 static void gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue) 2519 { 2520 struct net_device *dev = tx_queue->dev; 2521 struct netdev_queue *txq; 2522 struct gfar_private *priv = netdev_priv(dev); 2523 struct txbd8 *bdp, *next = NULL; 2524 struct txbd8 *lbdp = NULL; 2525 struct txbd8 *base = tx_queue->tx_bd_base; 2526 struct sk_buff *skb; 2527 int skb_dirtytx; 2528 int tx_ring_size = tx_queue->tx_ring_size; 2529 int frags = 0, nr_txbds = 0; 2530 int i; 2531 int howmany = 0; 2532 int tqi = tx_queue->qindex; 2533 unsigned int bytes_sent = 0; 2534 u32 lstatus; 2535 size_t buflen; 2536 2537 txq = netdev_get_tx_queue(dev, tqi); 2538 bdp = tx_queue->dirty_tx; 2539 skb_dirtytx = tx_queue->skb_dirtytx; 2540 2541 while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) { 2542 2543 frags = skb_shinfo(skb)->nr_frags; 2544 2545 /* When time stamping, one additional TxBD must be freed. 2546 * Also, we need to dma_unmap_single() the TxPAL. 2547 */ 2548 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) 2549 nr_txbds = frags + 2; 2550 else 2551 nr_txbds = frags + 1; 2552 2553 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size); 2554 2555 lstatus = be32_to_cpu(lbdp->lstatus); 2556 2557 /* Only clean completed frames */ 2558 if ((lstatus & BD_LFLAG(TXBD_READY)) && 2559 (lstatus & BD_LENGTH_MASK)) 2560 break; 2561 2562 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) { 2563 next = next_txbd(bdp, base, tx_ring_size); 2564 buflen = be16_to_cpu(next->length) + 2565 GMAC_FCB_LEN + GMAC_TXPAL_LEN; 2566 } else 2567 buflen = be16_to_cpu(bdp->length); 2568 2569 dma_unmap_single(priv->dev, be32_to_cpu(bdp->bufPtr), 2570 buflen, DMA_TO_DEVICE); 2571 2572 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) { 2573 struct skb_shared_hwtstamps shhwtstamps; 2574 u64 *ns = (u64 *)(((uintptr_t)skb->data + 0x10) & 2575 ~0x7UL); 2576 2577 memset(&shhwtstamps, 0, sizeof(shhwtstamps)); 2578 shhwtstamps.hwtstamp = ns_to_ktime(*ns); 2579 skb_pull(skb, GMAC_FCB_LEN + GMAC_TXPAL_LEN); 2580 skb_tstamp_tx(skb, &shhwtstamps); 2581 gfar_clear_txbd_status(bdp); 2582 bdp = next; 2583 } 2584 2585 gfar_clear_txbd_status(bdp); 2586 bdp = next_txbd(bdp, base, tx_ring_size); 2587 2588 for (i = 0; i < frags; i++) { 2589 dma_unmap_page(priv->dev, be32_to_cpu(bdp->bufPtr), 2590 be16_to_cpu(bdp->length), 2591 DMA_TO_DEVICE); 2592 gfar_clear_txbd_status(bdp); 2593 bdp = next_txbd(bdp, base, tx_ring_size); 2594 } 2595 2596 bytes_sent += GFAR_CB(skb)->bytes_sent; 2597 2598 dev_kfree_skb_any(skb); 2599 2600 tx_queue->tx_skbuff[skb_dirtytx] = NULL; 2601 2602 skb_dirtytx = (skb_dirtytx + 1) & 2603 TX_RING_MOD_MASK(tx_ring_size); 2604 2605 howmany++; 2606 spin_lock(&tx_queue->txlock); 2607 tx_queue->num_txbdfree += nr_txbds; 2608 spin_unlock(&tx_queue->txlock); 2609 } 2610 2611 /* If we freed a buffer, we can restart transmission, if necessary */ 2612 if (tx_queue->num_txbdfree && 2613 netif_tx_queue_stopped(txq) && 2614 !(test_bit(GFAR_DOWN, &priv->state))) 2615 netif_wake_subqueue(priv->ndev, tqi); 2616 2617 /* Update dirty indicators */ 2618 tx_queue->skb_dirtytx = skb_dirtytx; 2619 tx_queue->dirty_tx = bdp; 2620 2621 netdev_tx_completed_queue(txq, howmany, bytes_sent); 2622 } 2623 2624 static bool gfar_new_page(struct gfar_priv_rx_q *rxq, struct gfar_rx_buff *rxb) 2625 { 2626 struct page *page; 2627 dma_addr_t addr; 2628 2629 page = dev_alloc_page(); 2630 if (unlikely(!page)) 2631 return false; 2632 2633 addr = dma_map_page(rxq->dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE); 2634 if (unlikely(dma_mapping_error(rxq->dev, addr))) { 2635 __free_page(page); 2636 2637 return false; 2638 } 2639 2640 rxb->dma = addr; 2641 rxb->page = page; 2642 rxb->page_offset = 0; 2643 2644 return true; 2645 } 2646 2647 static void gfar_rx_alloc_err(struct gfar_priv_rx_q *rx_queue) 2648 { 2649 struct gfar_private *priv = netdev_priv(rx_queue->ndev); 2650 struct gfar_extra_stats *estats = &priv->extra_stats; 2651 2652 netdev_err(rx_queue->ndev, "Can't alloc RX buffers\n"); 2653 atomic64_inc(&estats->rx_alloc_err); 2654 } 2655 2656 static void gfar_alloc_rx_buffs(struct gfar_priv_rx_q *rx_queue, 2657 int alloc_cnt) 2658 { 2659 struct rxbd8 *bdp; 2660 struct gfar_rx_buff *rxb; 2661 int i; 2662 2663 i = rx_queue->next_to_use; 2664 bdp = &rx_queue->rx_bd_base[i]; 2665 rxb = &rx_queue->rx_buff[i]; 2666 2667 while (alloc_cnt--) { 2668 /* try reuse page */ 2669 if (unlikely(!rxb->page)) { 2670 if (unlikely(!gfar_new_page(rx_queue, rxb))) { 2671 gfar_rx_alloc_err(rx_queue); 2672 break; 2673 } 2674 } 2675 2676 /* Setup the new RxBD */ 2677 gfar_init_rxbdp(rx_queue, bdp, 2678 rxb->dma + rxb->page_offset + RXBUF_ALIGNMENT); 2679 2680 /* Update to the next pointer */ 2681 bdp++; 2682 rxb++; 2683 2684 if (unlikely(++i == rx_queue->rx_ring_size)) { 2685 i = 0; 2686 bdp = rx_queue->rx_bd_base; 2687 rxb = rx_queue->rx_buff; 2688 } 2689 } 2690 2691 rx_queue->next_to_use = i; 2692 rx_queue->next_to_alloc = i; 2693 } 2694 2695 static void count_errors(u32 lstatus, struct net_device *ndev) 2696 { 2697 struct gfar_private *priv = netdev_priv(ndev); 2698 struct net_device_stats *stats = &ndev->stats; 2699 struct gfar_extra_stats *estats = &priv->extra_stats; 2700 2701 /* If the packet was truncated, none of the other errors matter */ 2702 if (lstatus & BD_LFLAG(RXBD_TRUNCATED)) { 2703 stats->rx_length_errors++; 2704 2705 atomic64_inc(&estats->rx_trunc); 2706 2707 return; 2708 } 2709 /* Count the errors, if there were any */ 2710 if (lstatus & BD_LFLAG(RXBD_LARGE | RXBD_SHORT)) { 2711 stats->rx_length_errors++; 2712 2713 if (lstatus & BD_LFLAG(RXBD_LARGE)) 2714 atomic64_inc(&estats->rx_large); 2715 else 2716 atomic64_inc(&estats->rx_short); 2717 } 2718 if (lstatus & BD_LFLAG(RXBD_NONOCTET)) { 2719 stats->rx_frame_errors++; 2720 atomic64_inc(&estats->rx_nonoctet); 2721 } 2722 if (lstatus & BD_LFLAG(RXBD_CRCERR)) { 2723 atomic64_inc(&estats->rx_crcerr); 2724 stats->rx_crc_errors++; 2725 } 2726 if (lstatus & BD_LFLAG(RXBD_OVERRUN)) { 2727 atomic64_inc(&estats->rx_overrun); 2728 stats->rx_over_errors++; 2729 } 2730 } 2731 2732 irqreturn_t gfar_receive(int irq, void *grp_id) 2733 { 2734 struct gfar_priv_grp *grp = (struct gfar_priv_grp *)grp_id; 2735 unsigned long flags; 2736 u32 imask; 2737 2738 if (likely(napi_schedule_prep(&grp->napi_rx))) { 2739 spin_lock_irqsave(&grp->grplock, flags); 2740 imask = gfar_read(&grp->regs->imask); 2741 imask &= IMASK_RX_DISABLED; 2742 gfar_write(&grp->regs->imask, imask); 2743 spin_unlock_irqrestore(&grp->grplock, flags); 2744 __napi_schedule(&grp->napi_rx); 2745 } else { 2746 /* Clear IEVENT, so interrupts aren't called again 2747 * because of the packets that have already arrived. 2748 */ 2749 gfar_write(&grp->regs->ievent, IEVENT_RX_MASK); 2750 } 2751 2752 return IRQ_HANDLED; 2753 } 2754 2755 /* Interrupt Handler for Transmit complete */ 2756 static irqreturn_t gfar_transmit(int irq, void *grp_id) 2757 { 2758 struct gfar_priv_grp *grp = (struct gfar_priv_grp *)grp_id; 2759 unsigned long flags; 2760 u32 imask; 2761 2762 if (likely(napi_schedule_prep(&grp->napi_tx))) { 2763 spin_lock_irqsave(&grp->grplock, flags); 2764 imask = gfar_read(&grp->regs->imask); 2765 imask &= IMASK_TX_DISABLED; 2766 gfar_write(&grp->regs->imask, imask); 2767 spin_unlock_irqrestore(&grp->grplock, flags); 2768 __napi_schedule(&grp->napi_tx); 2769 } else { 2770 /* Clear IEVENT, so interrupts aren't called again 2771 * because of the packets that have already arrived. 2772 */ 2773 gfar_write(&grp->regs->ievent, IEVENT_TX_MASK); 2774 } 2775 2776 return IRQ_HANDLED; 2777 } 2778 2779 static bool gfar_add_rx_frag(struct gfar_rx_buff *rxb, u32 lstatus, 2780 struct sk_buff *skb, bool first) 2781 { 2782 unsigned int size = lstatus & BD_LENGTH_MASK; 2783 struct page *page = rxb->page; 2784 2785 /* Remove the FCS from the packet length */ 2786 if (likely(lstatus & BD_LFLAG(RXBD_LAST))) 2787 size -= ETH_FCS_LEN; 2788 2789 if (likely(first)) 2790 skb_put(skb, size); 2791 else 2792 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 2793 rxb->page_offset + RXBUF_ALIGNMENT, 2794 size, GFAR_RXB_TRUESIZE); 2795 2796 /* try reuse page */ 2797 if (unlikely(page_count(page) != 1)) 2798 return false; 2799 2800 /* change offset to the other half */ 2801 rxb->page_offset ^= GFAR_RXB_TRUESIZE; 2802 2803 atomic_inc(&page->_count); 2804 2805 return true; 2806 } 2807 2808 static void gfar_reuse_rx_page(struct gfar_priv_rx_q *rxq, 2809 struct gfar_rx_buff *old_rxb) 2810 { 2811 struct gfar_rx_buff *new_rxb; 2812 u16 nta = rxq->next_to_alloc; 2813 2814 new_rxb = &rxq->rx_buff[nta]; 2815 2816 /* find next buf that can reuse a page */ 2817 nta++; 2818 rxq->next_to_alloc = (nta < rxq->rx_ring_size) ? nta : 0; 2819 2820 /* copy page reference */ 2821 *new_rxb = *old_rxb; 2822 2823 /* sync for use by the device */ 2824 dma_sync_single_range_for_device(rxq->dev, old_rxb->dma, 2825 old_rxb->page_offset, 2826 GFAR_RXB_TRUESIZE, DMA_FROM_DEVICE); 2827 } 2828 2829 static struct sk_buff *gfar_get_next_rxbuff(struct gfar_priv_rx_q *rx_queue, 2830 u32 lstatus, struct sk_buff *skb) 2831 { 2832 struct gfar_rx_buff *rxb = &rx_queue->rx_buff[rx_queue->next_to_clean]; 2833 struct page *page = rxb->page; 2834 bool first = false; 2835 2836 if (likely(!skb)) { 2837 void *buff_addr = page_address(page) + rxb->page_offset; 2838 2839 skb = build_skb(buff_addr, GFAR_SKBFRAG_SIZE); 2840 if (unlikely(!skb)) { 2841 gfar_rx_alloc_err(rx_queue); 2842 return NULL; 2843 } 2844 skb_reserve(skb, RXBUF_ALIGNMENT); 2845 first = true; 2846 } 2847 2848 dma_sync_single_range_for_cpu(rx_queue->dev, rxb->dma, rxb->page_offset, 2849 GFAR_RXB_TRUESIZE, DMA_FROM_DEVICE); 2850 2851 if (gfar_add_rx_frag(rxb, lstatus, skb, first)) { 2852 /* reuse the free half of the page */ 2853 gfar_reuse_rx_page(rx_queue, rxb); 2854 } else { 2855 /* page cannot be reused, unmap it */ 2856 dma_unmap_page(rx_queue->dev, rxb->dma, 2857 PAGE_SIZE, DMA_FROM_DEVICE); 2858 } 2859 2860 /* clear rxb content */ 2861 rxb->page = NULL; 2862 2863 return skb; 2864 } 2865 2866 static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) 2867 { 2868 /* If valid headers were found, and valid sums 2869 * were verified, then we tell the kernel that no 2870 * checksumming is necessary. Otherwise, it is [FIXME] 2871 */ 2872 if ((be16_to_cpu(fcb->flags) & RXFCB_CSUM_MASK) == 2873 (RXFCB_CIP | RXFCB_CTU)) 2874 skb->ip_summed = CHECKSUM_UNNECESSARY; 2875 else 2876 skb_checksum_none_assert(skb); 2877 } 2878 2879 /* gfar_process_frame() -- handle one incoming packet if skb isn't NULL. */ 2880 static void gfar_process_frame(struct net_device *ndev, struct sk_buff *skb) 2881 { 2882 struct gfar_private *priv = netdev_priv(ndev); 2883 struct rxfcb *fcb = NULL; 2884 2885 /* fcb is at the beginning if exists */ 2886 fcb = (struct rxfcb *)skb->data; 2887 2888 /* Remove the FCB from the skb 2889 * Remove the padded bytes, if there are any 2890 */ 2891 if (priv->uses_rxfcb) 2892 skb_pull(skb, GMAC_FCB_LEN); 2893 2894 /* Get receive timestamp from the skb */ 2895 if (priv->hwts_rx_en) { 2896 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); 2897 u64 *ns = (u64 *) skb->data; 2898 2899 memset(shhwtstamps, 0, sizeof(*shhwtstamps)); 2900 shhwtstamps->hwtstamp = ns_to_ktime(*ns); 2901 } 2902 2903 if (priv->padding) 2904 skb_pull(skb, priv->padding); 2905 2906 if (ndev->features & NETIF_F_RXCSUM) 2907 gfar_rx_checksum(skb, fcb); 2908 2909 /* Tell the skb what kind of packet this is */ 2910 skb->protocol = eth_type_trans(skb, ndev); 2911 2912 /* There's need to check for NETIF_F_HW_VLAN_CTAG_RX here. 2913 * Even if vlan rx accel is disabled, on some chips 2914 * RXFCB_VLN is pseudo randomly set. 2915 */ 2916 if (ndev->features & NETIF_F_HW_VLAN_CTAG_RX && 2917 be16_to_cpu(fcb->flags) & RXFCB_VLN) 2918 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2919 be16_to_cpu(fcb->vlctl)); 2920 } 2921 2922 /* gfar_clean_rx_ring() -- Processes each frame in the rx ring 2923 * until the budget/quota has been reached. Returns the number 2924 * of frames handled 2925 */ 2926 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) 2927 { 2928 struct net_device *ndev = rx_queue->ndev; 2929 struct gfar_private *priv = netdev_priv(ndev); 2930 struct rxbd8 *bdp; 2931 int i, howmany = 0; 2932 struct sk_buff *skb = rx_queue->skb; 2933 int cleaned_cnt = gfar_rxbd_unused(rx_queue); 2934 unsigned int total_bytes = 0, total_pkts = 0; 2935 2936 /* Get the first full descriptor */ 2937 i = rx_queue->next_to_clean; 2938 2939 while (rx_work_limit--) { 2940 u32 lstatus; 2941 2942 if (cleaned_cnt >= GFAR_RX_BUFF_ALLOC) { 2943 gfar_alloc_rx_buffs(rx_queue, cleaned_cnt); 2944 cleaned_cnt = 0; 2945 } 2946 2947 bdp = &rx_queue->rx_bd_base[i]; 2948 lstatus = be32_to_cpu(bdp->lstatus); 2949 if (lstatus & BD_LFLAG(RXBD_EMPTY)) 2950 break; 2951 2952 /* order rx buffer descriptor reads */ 2953 rmb(); 2954 2955 /* fetch next to clean buffer from the ring */ 2956 skb = gfar_get_next_rxbuff(rx_queue, lstatus, skb); 2957 if (unlikely(!skb)) 2958 break; 2959 2960 cleaned_cnt++; 2961 howmany++; 2962 2963 if (unlikely(++i == rx_queue->rx_ring_size)) 2964 i = 0; 2965 2966 rx_queue->next_to_clean = i; 2967 2968 /* fetch next buffer if not the last in frame */ 2969 if (!(lstatus & BD_LFLAG(RXBD_LAST))) 2970 continue; 2971 2972 if (unlikely(lstatus & BD_LFLAG(RXBD_ERR))) { 2973 count_errors(lstatus, ndev); 2974 2975 /* discard faulty buffer */ 2976 dev_kfree_skb(skb); 2977 skb = NULL; 2978 rx_queue->stats.rx_dropped++; 2979 continue; 2980 } 2981 2982 /* Increment the number of packets */ 2983 total_pkts++; 2984 total_bytes += skb->len; 2985 2986 skb_record_rx_queue(skb, rx_queue->qindex); 2987 2988 gfar_process_frame(ndev, skb); 2989 2990 /* Send the packet up the stack */ 2991 napi_gro_receive(&rx_queue->grp->napi_rx, skb); 2992 2993 skb = NULL; 2994 } 2995 2996 /* Store incomplete frames for completion */ 2997 rx_queue->skb = skb; 2998 2999 rx_queue->stats.rx_packets += total_pkts; 3000 rx_queue->stats.rx_bytes += total_bytes; 3001 3002 if (cleaned_cnt) 3003 gfar_alloc_rx_buffs(rx_queue, cleaned_cnt); 3004 3005 /* Update Last Free RxBD pointer for LFC */ 3006 if (unlikely(priv->tx_actual_en)) { 3007 u32 bdp_dma = gfar_rxbd_dma_lastfree(rx_queue); 3008 3009 gfar_write(rx_queue->rfbptr, bdp_dma); 3010 } 3011 3012 return howmany; 3013 } 3014 3015 static int gfar_poll_rx_sq(struct napi_struct *napi, int budget) 3016 { 3017 struct gfar_priv_grp *gfargrp = 3018 container_of(napi, struct gfar_priv_grp, napi_rx); 3019 struct gfar __iomem *regs = gfargrp->regs; 3020 struct gfar_priv_rx_q *rx_queue = gfargrp->rx_queue; 3021 int work_done = 0; 3022 3023 /* Clear IEVENT, so interrupts aren't called again 3024 * because of the packets that have already arrived 3025 */ 3026 gfar_write(®s->ievent, IEVENT_RX_MASK); 3027 3028 work_done = gfar_clean_rx_ring(rx_queue, budget); 3029 3030 if (work_done < budget) { 3031 u32 imask; 3032 napi_complete(napi); 3033 /* Clear the halt bit in RSTAT */ 3034 gfar_write(®s->rstat, gfargrp->rstat); 3035 3036 spin_lock_irq(&gfargrp->grplock); 3037 imask = gfar_read(®s->imask); 3038 imask |= IMASK_RX_DEFAULT; 3039 gfar_write(®s->imask, imask); 3040 spin_unlock_irq(&gfargrp->grplock); 3041 } 3042 3043 return work_done; 3044 } 3045 3046 static int gfar_poll_tx_sq(struct napi_struct *napi, int budget) 3047 { 3048 struct gfar_priv_grp *gfargrp = 3049 container_of(napi, struct gfar_priv_grp, napi_tx); 3050 struct gfar __iomem *regs = gfargrp->regs; 3051 struct gfar_priv_tx_q *tx_queue = gfargrp->tx_queue; 3052 u32 imask; 3053 3054 /* Clear IEVENT, so interrupts aren't called again 3055 * because of the packets that have already arrived 3056 */ 3057 gfar_write(®s->ievent, IEVENT_TX_MASK); 3058 3059 /* run Tx cleanup to completion */ 3060 if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) 3061 gfar_clean_tx_ring(tx_queue); 3062 3063 napi_complete(napi); 3064 3065 spin_lock_irq(&gfargrp->grplock); 3066 imask = gfar_read(®s->imask); 3067 imask |= IMASK_TX_DEFAULT; 3068 gfar_write(®s->imask, imask); 3069 spin_unlock_irq(&gfargrp->grplock); 3070 3071 return 0; 3072 } 3073 3074 static int gfar_poll_rx(struct napi_struct *napi, int budget) 3075 { 3076 struct gfar_priv_grp *gfargrp = 3077 container_of(napi, struct gfar_priv_grp, napi_rx); 3078 struct gfar_private *priv = gfargrp->priv; 3079 struct gfar __iomem *regs = gfargrp->regs; 3080 struct gfar_priv_rx_q *rx_queue = NULL; 3081 int work_done = 0, work_done_per_q = 0; 3082 int i, budget_per_q = 0; 3083 unsigned long rstat_rxf; 3084 int num_act_queues; 3085 3086 /* Clear IEVENT, so interrupts aren't called again 3087 * because of the packets that have already arrived 3088 */ 3089 gfar_write(®s->ievent, IEVENT_RX_MASK); 3090 3091 rstat_rxf = gfar_read(®s->rstat) & RSTAT_RXF_MASK; 3092 3093 num_act_queues = bitmap_weight(&rstat_rxf, MAX_RX_QS); 3094 if (num_act_queues) 3095 budget_per_q = budget/num_act_queues; 3096 3097 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) { 3098 /* skip queue if not active */ 3099 if (!(rstat_rxf & (RSTAT_CLEAR_RXF0 >> i))) 3100 continue; 3101 3102 rx_queue = priv->rx_queue[i]; 3103 work_done_per_q = 3104 gfar_clean_rx_ring(rx_queue, budget_per_q); 3105 work_done += work_done_per_q; 3106 3107 /* finished processing this queue */ 3108 if (work_done_per_q < budget_per_q) { 3109 /* clear active queue hw indication */ 3110 gfar_write(®s->rstat, 3111 RSTAT_CLEAR_RXF0 >> i); 3112 num_act_queues--; 3113 3114 if (!num_act_queues) 3115 break; 3116 } 3117 } 3118 3119 if (!num_act_queues) { 3120 u32 imask; 3121 napi_complete(napi); 3122 3123 /* Clear the halt bit in RSTAT */ 3124 gfar_write(®s->rstat, gfargrp->rstat); 3125 3126 spin_lock_irq(&gfargrp->grplock); 3127 imask = gfar_read(®s->imask); 3128 imask |= IMASK_RX_DEFAULT; 3129 gfar_write(®s->imask, imask); 3130 spin_unlock_irq(&gfargrp->grplock); 3131 } 3132 3133 return work_done; 3134 } 3135 3136 static int gfar_poll_tx(struct napi_struct *napi, int budget) 3137 { 3138 struct gfar_priv_grp *gfargrp = 3139 container_of(napi, struct gfar_priv_grp, napi_tx); 3140 struct gfar_private *priv = gfargrp->priv; 3141 struct gfar __iomem *regs = gfargrp->regs; 3142 struct gfar_priv_tx_q *tx_queue = NULL; 3143 int has_tx_work = 0; 3144 int i; 3145 3146 /* Clear IEVENT, so interrupts aren't called again 3147 * because of the packets that have already arrived 3148 */ 3149 gfar_write(®s->ievent, IEVENT_TX_MASK); 3150 3151 for_each_set_bit(i, &gfargrp->tx_bit_map, priv->num_tx_queues) { 3152 tx_queue = priv->tx_queue[i]; 3153 /* run Tx cleanup to completion */ 3154 if (tx_queue->tx_skbuff[tx_queue->skb_dirtytx]) { 3155 gfar_clean_tx_ring(tx_queue); 3156 has_tx_work = 1; 3157 } 3158 } 3159 3160 if (!has_tx_work) { 3161 u32 imask; 3162 napi_complete(napi); 3163 3164 spin_lock_irq(&gfargrp->grplock); 3165 imask = gfar_read(®s->imask); 3166 imask |= IMASK_TX_DEFAULT; 3167 gfar_write(®s->imask, imask); 3168 spin_unlock_irq(&gfargrp->grplock); 3169 } 3170 3171 return 0; 3172 } 3173 3174 3175 #ifdef CONFIG_NET_POLL_CONTROLLER 3176 /* Polling 'interrupt' - used by things like netconsole to send skbs 3177 * without having to re-enable interrupts. It's not called while 3178 * the interrupt routine is executing. 3179 */ 3180 static void gfar_netpoll(struct net_device *dev) 3181 { 3182 struct gfar_private *priv = netdev_priv(dev); 3183 int i; 3184 3185 /* If the device has multiple interrupts, run tx/rx */ 3186 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { 3187 for (i = 0; i < priv->num_grps; i++) { 3188 struct gfar_priv_grp *grp = &priv->gfargrp[i]; 3189 3190 disable_irq(gfar_irq(grp, TX)->irq); 3191 disable_irq(gfar_irq(grp, RX)->irq); 3192 disable_irq(gfar_irq(grp, ER)->irq); 3193 gfar_interrupt(gfar_irq(grp, TX)->irq, grp); 3194 enable_irq(gfar_irq(grp, ER)->irq); 3195 enable_irq(gfar_irq(grp, RX)->irq); 3196 enable_irq(gfar_irq(grp, TX)->irq); 3197 } 3198 } else { 3199 for (i = 0; i < priv->num_grps; i++) { 3200 struct gfar_priv_grp *grp = &priv->gfargrp[i]; 3201 3202 disable_irq(gfar_irq(grp, TX)->irq); 3203 gfar_interrupt(gfar_irq(grp, TX)->irq, grp); 3204 enable_irq(gfar_irq(grp, TX)->irq); 3205 } 3206 } 3207 } 3208 #endif 3209 3210 /* The interrupt handler for devices with one interrupt */ 3211 static irqreturn_t gfar_interrupt(int irq, void *grp_id) 3212 { 3213 struct gfar_priv_grp *gfargrp = grp_id; 3214 3215 /* Save ievent for future reference */ 3216 u32 events = gfar_read(&gfargrp->regs->ievent); 3217 3218 /* Check for reception */ 3219 if (events & IEVENT_RX_MASK) 3220 gfar_receive(irq, grp_id); 3221 3222 /* Check for transmit completion */ 3223 if (events & IEVENT_TX_MASK) 3224 gfar_transmit(irq, grp_id); 3225 3226 /* Check for errors */ 3227 if (events & IEVENT_ERR_MASK) 3228 gfar_error(irq, grp_id); 3229 3230 return IRQ_HANDLED; 3231 } 3232 3233 /* Called every time the controller might need to be made 3234 * aware of new link state. The PHY code conveys this 3235 * information through variables in the phydev structure, and this 3236 * function converts those variables into the appropriate 3237 * register values, and can bring down the device if needed. 3238 */ 3239 static void adjust_link(struct net_device *dev) 3240 { 3241 struct gfar_private *priv = netdev_priv(dev); 3242 struct phy_device *phydev = priv->phydev; 3243 3244 if (unlikely(phydev->link != priv->oldlink || 3245 (phydev->link && (phydev->duplex != priv->oldduplex || 3246 phydev->speed != priv->oldspeed)))) 3247 gfar_update_link_state(priv); 3248 } 3249 3250 /* Update the hash table based on the current list of multicast 3251 * addresses we subscribe to. Also, change the promiscuity of 3252 * the device based on the flags (this function is called 3253 * whenever dev->flags is changed 3254 */ 3255 static void gfar_set_multi(struct net_device *dev) 3256 { 3257 struct netdev_hw_addr *ha; 3258 struct gfar_private *priv = netdev_priv(dev); 3259 struct gfar __iomem *regs = priv->gfargrp[0].regs; 3260 u32 tempval; 3261 3262 if (dev->flags & IFF_PROMISC) { 3263 /* Set RCTRL to PROM */ 3264 tempval = gfar_read(®s->rctrl); 3265 tempval |= RCTRL_PROM; 3266 gfar_write(®s->rctrl, tempval); 3267 } else { 3268 /* Set RCTRL to not PROM */ 3269 tempval = gfar_read(®s->rctrl); 3270 tempval &= ~(RCTRL_PROM); 3271 gfar_write(®s->rctrl, tempval); 3272 } 3273 3274 if (dev->flags & IFF_ALLMULTI) { 3275 /* Set the hash to rx all multicast frames */ 3276 gfar_write(®s->igaddr0, 0xffffffff); 3277 gfar_write(®s->igaddr1, 0xffffffff); 3278 gfar_write(®s->igaddr2, 0xffffffff); 3279 gfar_write(®s->igaddr3, 0xffffffff); 3280 gfar_write(®s->igaddr4, 0xffffffff); 3281 gfar_write(®s->igaddr5, 0xffffffff); 3282 gfar_write(®s->igaddr6, 0xffffffff); 3283 gfar_write(®s->igaddr7, 0xffffffff); 3284 gfar_write(®s->gaddr0, 0xffffffff); 3285 gfar_write(®s->gaddr1, 0xffffffff); 3286 gfar_write(®s->gaddr2, 0xffffffff); 3287 gfar_write(®s->gaddr3, 0xffffffff); 3288 gfar_write(®s->gaddr4, 0xffffffff); 3289 gfar_write(®s->gaddr5, 0xffffffff); 3290 gfar_write(®s->gaddr6, 0xffffffff); 3291 gfar_write(®s->gaddr7, 0xffffffff); 3292 } else { 3293 int em_num; 3294 int idx; 3295 3296 /* zero out the hash */ 3297 gfar_write(®s->igaddr0, 0x0); 3298 gfar_write(®s->igaddr1, 0x0); 3299 gfar_write(®s->igaddr2, 0x0); 3300 gfar_write(®s->igaddr3, 0x0); 3301 gfar_write(®s->igaddr4, 0x0); 3302 gfar_write(®s->igaddr5, 0x0); 3303 gfar_write(®s->igaddr6, 0x0); 3304 gfar_write(®s->igaddr7, 0x0); 3305 gfar_write(®s->gaddr0, 0x0); 3306 gfar_write(®s->gaddr1, 0x0); 3307 gfar_write(®s->gaddr2, 0x0); 3308 gfar_write(®s->gaddr3, 0x0); 3309 gfar_write(®s->gaddr4, 0x0); 3310 gfar_write(®s->gaddr5, 0x0); 3311 gfar_write(®s->gaddr6, 0x0); 3312 gfar_write(®s->gaddr7, 0x0); 3313 3314 /* If we have extended hash tables, we need to 3315 * clear the exact match registers to prepare for 3316 * setting them 3317 */ 3318 if (priv->extended_hash) { 3319 em_num = GFAR_EM_NUM + 1; 3320 gfar_clear_exact_match(dev); 3321 idx = 1; 3322 } else { 3323 idx = 0; 3324 em_num = 0; 3325 } 3326 3327 if (netdev_mc_empty(dev)) 3328 return; 3329 3330 /* Parse the list, and set the appropriate bits */ 3331 netdev_for_each_mc_addr(ha, dev) { 3332 if (idx < em_num) { 3333 gfar_set_mac_for_addr(dev, idx, ha->addr); 3334 idx++; 3335 } else 3336 gfar_set_hash_for_addr(dev, ha->addr); 3337 } 3338 } 3339 } 3340 3341 3342 /* Clears each of the exact match registers to zero, so they 3343 * don't interfere with normal reception 3344 */ 3345 static void gfar_clear_exact_match(struct net_device *dev) 3346 { 3347 int idx; 3348 static const u8 zero_arr[ETH_ALEN] = {0, 0, 0, 0, 0, 0}; 3349 3350 for (idx = 1; idx < GFAR_EM_NUM + 1; idx++) 3351 gfar_set_mac_for_addr(dev, idx, zero_arr); 3352 } 3353 3354 /* Set the appropriate hash bit for the given addr */ 3355 /* The algorithm works like so: 3356 * 1) Take the Destination Address (ie the multicast address), and 3357 * do a CRC on it (little endian), and reverse the bits of the 3358 * result. 3359 * 2) Use the 8 most significant bits as a hash into a 256-entry 3360 * table. The table is controlled through 8 32-bit registers: 3361 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is 3362 * gaddr7. This means that the 3 most significant bits in the 3363 * hash index which gaddr register to use, and the 5 other bits 3364 * indicate which bit (assuming an IBM numbering scheme, which 3365 * for PowerPC (tm) is usually the case) in the register holds 3366 * the entry. 3367 */ 3368 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) 3369 { 3370 u32 tempval; 3371 struct gfar_private *priv = netdev_priv(dev); 3372 u32 result = ether_crc(ETH_ALEN, addr); 3373 int width = priv->hash_width; 3374 u8 whichbit = (result >> (32 - width)) & 0x1f; 3375 u8 whichreg = result >> (32 - width + 5); 3376 u32 value = (1 << (31-whichbit)); 3377 3378 tempval = gfar_read(priv->hash_regs[whichreg]); 3379 tempval |= value; 3380 gfar_write(priv->hash_regs[whichreg], tempval); 3381 } 3382 3383 3384 /* There are multiple MAC Address register pairs on some controllers 3385 * This function sets the numth pair to a given address 3386 */ 3387 static void gfar_set_mac_for_addr(struct net_device *dev, int num, 3388 const u8 *addr) 3389 { 3390 struct gfar_private *priv = netdev_priv(dev); 3391 struct gfar __iomem *regs = priv->gfargrp[0].regs; 3392 u32 tempval; 3393 u32 __iomem *macptr = ®s->macstnaddr1; 3394 3395 macptr += num*2; 3396 3397 /* For a station address of 0x12345678ABCD in transmission 3398 * order (BE), MACnADDR1 is set to 0xCDAB7856 and 3399 * MACnADDR2 is set to 0x34120000. 3400 */ 3401 tempval = (addr[5] << 24) | (addr[4] << 16) | 3402 (addr[3] << 8) | addr[2]; 3403 3404 gfar_write(macptr, tempval); 3405 3406 tempval = (addr[1] << 24) | (addr[0] << 16); 3407 3408 gfar_write(macptr+1, tempval); 3409 } 3410 3411 /* GFAR error interrupt handler */ 3412 static irqreturn_t gfar_error(int irq, void *grp_id) 3413 { 3414 struct gfar_priv_grp *gfargrp = grp_id; 3415 struct gfar __iomem *regs = gfargrp->regs; 3416 struct gfar_private *priv= gfargrp->priv; 3417 struct net_device *dev = priv->ndev; 3418 3419 /* Save ievent for future reference */ 3420 u32 events = gfar_read(®s->ievent); 3421 3422 /* Clear IEVENT */ 3423 gfar_write(®s->ievent, events & IEVENT_ERR_MASK); 3424 3425 /* Magic Packet is not an error. */ 3426 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && 3427 (events & IEVENT_MAG)) 3428 events &= ~IEVENT_MAG; 3429 3430 /* Hmm... */ 3431 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) 3432 netdev_dbg(dev, 3433 "error interrupt (ievent=0x%08x imask=0x%08x)\n", 3434 events, gfar_read(®s->imask)); 3435 3436 /* Update the error counters */ 3437 if (events & IEVENT_TXE) { 3438 dev->stats.tx_errors++; 3439 3440 if (events & IEVENT_LC) 3441 dev->stats.tx_window_errors++; 3442 if (events & IEVENT_CRL) 3443 dev->stats.tx_aborted_errors++; 3444 if (events & IEVENT_XFUN) { 3445 netif_dbg(priv, tx_err, dev, 3446 "TX FIFO underrun, packet dropped\n"); 3447 dev->stats.tx_dropped++; 3448 atomic64_inc(&priv->extra_stats.tx_underrun); 3449 3450 schedule_work(&priv->reset_task); 3451 } 3452 netif_dbg(priv, tx_err, dev, "Transmit Error\n"); 3453 } 3454 if (events & IEVENT_BSY) { 3455 dev->stats.rx_errors++; 3456 atomic64_inc(&priv->extra_stats.rx_bsy); 3457 3458 gfar_receive(irq, grp_id); 3459 3460 netif_dbg(priv, rx_err, dev, "busy error (rstat: %x)\n", 3461 gfar_read(®s->rstat)); 3462 } 3463 if (events & IEVENT_BABR) { 3464 dev->stats.rx_errors++; 3465 atomic64_inc(&priv->extra_stats.rx_babr); 3466 3467 netif_dbg(priv, rx_err, dev, "babbling RX error\n"); 3468 } 3469 if (events & IEVENT_EBERR) { 3470 atomic64_inc(&priv->extra_stats.eberr); 3471 netif_dbg(priv, rx_err, dev, "bus error\n"); 3472 } 3473 if (events & IEVENT_RXC) 3474 netif_dbg(priv, rx_status, dev, "control frame\n"); 3475 3476 if (events & IEVENT_BABT) { 3477 atomic64_inc(&priv->extra_stats.tx_babt); 3478 netif_dbg(priv, tx_err, dev, "babbling TX error\n"); 3479 } 3480 return IRQ_HANDLED; 3481 } 3482 3483 static u32 gfar_get_flowctrl_cfg(struct gfar_private *priv) 3484 { 3485 struct phy_device *phydev = priv->phydev; 3486 u32 val = 0; 3487 3488 if (!phydev->duplex) 3489 return val; 3490 3491 if (!priv->pause_aneg_en) { 3492 if (priv->tx_pause_en) 3493 val |= MACCFG1_TX_FLOW; 3494 if (priv->rx_pause_en) 3495 val |= MACCFG1_RX_FLOW; 3496 } else { 3497 u16 lcl_adv, rmt_adv; 3498 u8 flowctrl; 3499 /* get link partner capabilities */ 3500 rmt_adv = 0; 3501 if (phydev->pause) 3502 rmt_adv = LPA_PAUSE_CAP; 3503 if (phydev->asym_pause) 3504 rmt_adv |= LPA_PAUSE_ASYM; 3505 3506 lcl_adv = 0; 3507 if (phydev->advertising & ADVERTISED_Pause) 3508 lcl_adv |= ADVERTISE_PAUSE_CAP; 3509 if (phydev->advertising & ADVERTISED_Asym_Pause) 3510 lcl_adv |= ADVERTISE_PAUSE_ASYM; 3511 3512 flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv); 3513 if (flowctrl & FLOW_CTRL_TX) 3514 val |= MACCFG1_TX_FLOW; 3515 if (flowctrl & FLOW_CTRL_RX) 3516 val |= MACCFG1_RX_FLOW; 3517 } 3518 3519 return val; 3520 } 3521 3522 static noinline void gfar_update_link_state(struct gfar_private *priv) 3523 { 3524 struct gfar __iomem *regs = priv->gfargrp[0].regs; 3525 struct phy_device *phydev = priv->phydev; 3526 struct gfar_priv_rx_q *rx_queue = NULL; 3527 int i; 3528 3529 if (unlikely(test_bit(GFAR_RESETTING, &priv->state))) 3530 return; 3531 3532 if (phydev->link) { 3533 u32 tempval1 = gfar_read(®s->maccfg1); 3534 u32 tempval = gfar_read(®s->maccfg2); 3535 u32 ecntrl = gfar_read(®s->ecntrl); 3536 u32 tx_flow_oldval = (tempval & MACCFG1_TX_FLOW); 3537 3538 if (phydev->duplex != priv->oldduplex) { 3539 if (!(phydev->duplex)) 3540 tempval &= ~(MACCFG2_FULL_DUPLEX); 3541 else 3542 tempval |= MACCFG2_FULL_DUPLEX; 3543 3544 priv->oldduplex = phydev->duplex; 3545 } 3546 3547 if (phydev->speed != priv->oldspeed) { 3548 switch (phydev->speed) { 3549 case 1000: 3550 tempval = 3551 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); 3552 3553 ecntrl &= ~(ECNTRL_R100); 3554 break; 3555 case 100: 3556 case 10: 3557 tempval = 3558 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); 3559 3560 /* Reduced mode distinguishes 3561 * between 10 and 100 3562 */ 3563 if (phydev->speed == SPEED_100) 3564 ecntrl |= ECNTRL_R100; 3565 else 3566 ecntrl &= ~(ECNTRL_R100); 3567 break; 3568 default: 3569 netif_warn(priv, link, priv->ndev, 3570 "Ack! Speed (%d) is not 10/100/1000!\n", 3571 phydev->speed); 3572 break; 3573 } 3574 3575 priv->oldspeed = phydev->speed; 3576 } 3577 3578 tempval1 &= ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); 3579 tempval1 |= gfar_get_flowctrl_cfg(priv); 3580 3581 /* Turn last free buffer recording on */ 3582 if ((tempval1 & MACCFG1_TX_FLOW) && !tx_flow_oldval) { 3583 for (i = 0; i < priv->num_rx_queues; i++) { 3584 u32 bdp_dma; 3585 3586 rx_queue = priv->rx_queue[i]; 3587 bdp_dma = gfar_rxbd_dma_lastfree(rx_queue); 3588 gfar_write(rx_queue->rfbptr, bdp_dma); 3589 } 3590 3591 priv->tx_actual_en = 1; 3592 } 3593 3594 if (unlikely(!(tempval1 & MACCFG1_TX_FLOW) && tx_flow_oldval)) 3595 priv->tx_actual_en = 0; 3596 3597 gfar_write(®s->maccfg1, tempval1); 3598 gfar_write(®s->maccfg2, tempval); 3599 gfar_write(®s->ecntrl, ecntrl); 3600 3601 if (!priv->oldlink) 3602 priv->oldlink = 1; 3603 3604 } else if (priv->oldlink) { 3605 priv->oldlink = 0; 3606 priv->oldspeed = 0; 3607 priv->oldduplex = -1; 3608 } 3609 3610 if (netif_msg_link(priv)) 3611 phy_print_status(phydev); 3612 } 3613 3614 static const struct of_device_id gfar_match[] = 3615 { 3616 { 3617 .type = "network", 3618 .compatible = "gianfar", 3619 }, 3620 { 3621 .compatible = "fsl,etsec2", 3622 }, 3623 {}, 3624 }; 3625 MODULE_DEVICE_TABLE(of, gfar_match); 3626 3627 /* Structure for a device driver */ 3628 static struct platform_driver gfar_driver = { 3629 .driver = { 3630 .name = "fsl-gianfar", 3631 .pm = GFAR_PM_OPS, 3632 .of_match_table = gfar_match, 3633 }, 3634 .probe = gfar_probe, 3635 .remove = gfar_remove, 3636 }; 3637 3638 module_platform_driver(gfar_driver); 3639