1 /* 2 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports 3 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com> 4 * 5 * Based on the 64360 driver from: 6 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il> 7 * Rabeeh Khoury <rabeeh@marvell.com> 8 * 9 * Copyright (C) 2003 PMC-Sierra, Inc., 10 * written by Manish Lachwani 11 * 12 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org> 13 * 14 * Copyright (C) 2004-2006 MontaVista Software, Inc. 15 * Dale Farnsworth <dale@farnsworth.org> 16 * 17 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com> 18 * <sjhill@realitydiluted.com> 19 * 20 * Copyright (C) 2007-2008 Marvell Semiconductor 21 * Lennert Buytenhek <buytenh@marvell.com> 22 * 23 * Copyright (C) 2013 Michael Stapelberg <michael@stapelberg.de> 24 * 25 * This program is free software; you can redistribute it and/or 26 * modify it under the terms of the GNU General Public License 27 * as published by the Free Software Foundation; either version 2 28 * of the License, or (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 33 * GNU General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, see <http://www.gnu.org/licenses/>. 37 */ 38 39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 40 41 #include <linux/init.h> 42 #include <linux/dma-mapping.h> 43 #include <linux/in.h> 44 #include <linux/ip.h> 45 #include <net/tso.h> 46 #include <linux/tcp.h> 47 #include <linux/udp.h> 48 #include <linux/etherdevice.h> 49 #include <linux/delay.h> 50 #include <linux/ethtool.h> 51 #include <linux/platform_device.h> 52 #include <linux/module.h> 53 #include <linux/kernel.h> 54 #include <linux/spinlock.h> 55 #include <linux/workqueue.h> 56 #include <linux/phy.h> 57 #include <linux/mv643xx_eth.h> 58 #include <linux/io.h> 59 #include <linux/interrupt.h> 60 #include <linux/types.h> 61 #include <linux/slab.h> 62 #include <linux/clk.h> 63 #include <linux/of.h> 64 #include <linux/of_irq.h> 65 #include <linux/of_net.h> 66 #include <linux/of_mdio.h> 67 68 static char mv643xx_eth_driver_name[] = "mv643xx_eth"; 69 static char mv643xx_eth_driver_version[] = "1.4"; 70 71 72 /* 73 * Registers shared between all ports. 74 */ 75 #define PHY_ADDR 0x0000 76 #define WINDOW_BASE(w) (0x0200 + ((w) << 3)) 77 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3)) 78 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2)) 79 #define WINDOW_BAR_ENABLE 0x0290 80 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4)) 81 82 /* 83 * Main per-port registers. These live at offset 0x0400 for 84 * port #0, 0x0800 for port #1, and 0x0c00 for port #2. 85 */ 86 #define PORT_CONFIG 0x0000 87 #define UNICAST_PROMISCUOUS_MODE 0x00000001 88 #define PORT_CONFIG_EXT 0x0004 89 #define MAC_ADDR_LOW 0x0014 90 #define MAC_ADDR_HIGH 0x0018 91 #define SDMA_CONFIG 0x001c 92 #define TX_BURST_SIZE_16_64BIT 0x01000000 93 #define TX_BURST_SIZE_4_64BIT 0x00800000 94 #define BLM_TX_NO_SWAP 0x00000020 95 #define BLM_RX_NO_SWAP 0x00000010 96 #define RX_BURST_SIZE_16_64BIT 0x00000008 97 #define RX_BURST_SIZE_4_64BIT 0x00000004 98 #define PORT_SERIAL_CONTROL 0x003c 99 #define SET_MII_SPEED_TO_100 0x01000000 100 #define SET_GMII_SPEED_TO_1000 0x00800000 101 #define SET_FULL_DUPLEX_MODE 0x00200000 102 #define MAX_RX_PACKET_9700BYTE 0x000a0000 103 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000 104 #define DO_NOT_FORCE_LINK_FAIL 0x00000400 105 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200 106 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008 107 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004 108 #define FORCE_LINK_PASS 0x00000002 109 #define SERIAL_PORT_ENABLE 0x00000001 110 #define PORT_STATUS 0x0044 111 #define TX_FIFO_EMPTY 0x00000400 112 #define TX_IN_PROGRESS 0x00000080 113 #define PORT_SPEED_MASK 0x00000030 114 #define PORT_SPEED_1000 0x00000010 115 #define PORT_SPEED_100 0x00000020 116 #define PORT_SPEED_10 0x00000000 117 #define FLOW_CONTROL_ENABLED 0x00000008 118 #define FULL_DUPLEX 0x00000004 119 #define LINK_UP 0x00000002 120 #define TXQ_COMMAND 0x0048 121 #define TXQ_FIX_PRIO_CONF 0x004c 122 #define PORT_SERIAL_CONTROL1 0x004c 123 #define CLK125_BYPASS_EN 0x00000010 124 #define TX_BW_RATE 0x0050 125 #define TX_BW_MTU 0x0058 126 #define TX_BW_BURST 0x005c 127 #define INT_CAUSE 0x0060 128 #define INT_TX_END 0x07f80000 129 #define INT_TX_END_0 0x00080000 130 #define INT_RX 0x000003fc 131 #define INT_RX_0 0x00000004 132 #define INT_EXT 0x00000002 133 #define INT_CAUSE_EXT 0x0064 134 #define INT_EXT_LINK_PHY 0x00110000 135 #define INT_EXT_TX 0x000000ff 136 #define INT_MASK 0x0068 137 #define INT_MASK_EXT 0x006c 138 #define TX_FIFO_URGENT_THRESHOLD 0x0074 139 #define RX_DISCARD_FRAME_CNT 0x0084 140 #define RX_OVERRUN_FRAME_CNT 0x0088 141 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc 142 #define TX_BW_RATE_MOVED 0x00e0 143 #define TX_BW_MTU_MOVED 0x00e8 144 #define TX_BW_BURST_MOVED 0x00ec 145 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4)) 146 #define RXQ_COMMAND 0x0280 147 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2)) 148 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4)) 149 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4)) 150 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4)) 151 152 /* 153 * Misc per-port registers. 154 */ 155 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7)) 156 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10)) 157 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10)) 158 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10)) 159 160 161 /* 162 * SDMA configuration register default value. 163 */ 164 #if defined(__BIG_ENDIAN) 165 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 166 (RX_BURST_SIZE_4_64BIT | \ 167 TX_BURST_SIZE_4_64BIT) 168 #elif defined(__LITTLE_ENDIAN) 169 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 170 (RX_BURST_SIZE_4_64BIT | \ 171 BLM_RX_NO_SWAP | \ 172 BLM_TX_NO_SWAP | \ 173 TX_BURST_SIZE_4_64BIT) 174 #else 175 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 176 #endif 177 178 179 /* 180 * Misc definitions. 181 */ 182 #define DEFAULT_RX_QUEUE_SIZE 128 183 #define DEFAULT_TX_QUEUE_SIZE 512 184 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) 185 186 #define TSO_HEADER_SIZE 128 187 188 /* Max number of allowed TCP segments for software TSO */ 189 #define MV643XX_MAX_TSO_SEGS 100 190 #define MV643XX_MAX_SKB_DESCS (MV643XX_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 191 192 #define IS_TSO_HEADER(txq, addr) \ 193 ((addr >= txq->tso_hdrs_dma) && \ 194 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE)) 195 196 #define DESC_DMA_MAP_SINGLE 0 197 #define DESC_DMA_MAP_PAGE 1 198 199 /* 200 * RX/TX descriptors. 201 */ 202 #if defined(__BIG_ENDIAN) 203 struct rx_desc { 204 u16 byte_cnt; /* Descriptor buffer byte count */ 205 u16 buf_size; /* Buffer size */ 206 u32 cmd_sts; /* Descriptor command status */ 207 u32 next_desc_ptr; /* Next descriptor pointer */ 208 u32 buf_ptr; /* Descriptor buffer pointer */ 209 }; 210 211 struct tx_desc { 212 u16 byte_cnt; /* buffer byte count */ 213 u16 l4i_chk; /* CPU provided TCP checksum */ 214 u32 cmd_sts; /* Command/status field */ 215 u32 next_desc_ptr; /* Pointer to next descriptor */ 216 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 217 }; 218 #elif defined(__LITTLE_ENDIAN) 219 struct rx_desc { 220 u32 cmd_sts; /* Descriptor command status */ 221 u16 buf_size; /* Buffer size */ 222 u16 byte_cnt; /* Descriptor buffer byte count */ 223 u32 buf_ptr; /* Descriptor buffer pointer */ 224 u32 next_desc_ptr; /* Next descriptor pointer */ 225 }; 226 227 struct tx_desc { 228 u32 cmd_sts; /* Command/status field */ 229 u16 l4i_chk; /* CPU provided TCP checksum */ 230 u16 byte_cnt; /* buffer byte count */ 231 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 232 u32 next_desc_ptr; /* Pointer to next descriptor */ 233 }; 234 #else 235 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 236 #endif 237 238 /* RX & TX descriptor command */ 239 #define BUFFER_OWNED_BY_DMA 0x80000000 240 241 /* RX & TX descriptor status */ 242 #define ERROR_SUMMARY 0x00000001 243 244 /* RX descriptor status */ 245 #define LAYER_4_CHECKSUM_OK 0x40000000 246 #define RX_ENABLE_INTERRUPT 0x20000000 247 #define RX_FIRST_DESC 0x08000000 248 #define RX_LAST_DESC 0x04000000 249 #define RX_IP_HDR_OK 0x02000000 250 #define RX_PKT_IS_IPV4 0x01000000 251 #define RX_PKT_IS_ETHERNETV2 0x00800000 252 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000 253 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000 254 #define RX_PKT_IS_VLAN_TAGGED 0x00080000 255 256 /* TX descriptor command */ 257 #define TX_ENABLE_INTERRUPT 0x00800000 258 #define GEN_CRC 0x00400000 259 #define TX_FIRST_DESC 0x00200000 260 #define TX_LAST_DESC 0x00100000 261 #define ZERO_PADDING 0x00080000 262 #define GEN_IP_V4_CHECKSUM 0x00040000 263 #define GEN_TCP_UDP_CHECKSUM 0x00020000 264 #define UDP_FRAME 0x00010000 265 #define MAC_HDR_EXTRA_4_BYTES 0x00008000 266 #define GEN_TCP_UDP_CHK_FULL 0x00000400 267 #define MAC_HDR_EXTRA_8_BYTES 0x00000200 268 269 #define TX_IHL_SHIFT 11 270 271 272 /* global *******************************************************************/ 273 struct mv643xx_eth_shared_private { 274 /* 275 * Ethernet controller base address. 276 */ 277 void __iomem *base; 278 279 /* 280 * Per-port MBUS window access register value. 281 */ 282 u32 win_protect; 283 284 /* 285 * Hardware-specific parameters. 286 */ 287 int extended_rx_coal_limit; 288 int tx_bw_control; 289 int tx_csum_limit; 290 struct clk *clk; 291 }; 292 293 #define TX_BW_CONTROL_ABSENT 0 294 #define TX_BW_CONTROL_OLD_LAYOUT 1 295 #define TX_BW_CONTROL_NEW_LAYOUT 2 296 297 static int mv643xx_eth_open(struct net_device *dev); 298 static int mv643xx_eth_stop(struct net_device *dev); 299 300 301 /* per-port *****************************************************************/ 302 struct mib_counters { 303 u64 good_octets_received; 304 u32 bad_octets_received; 305 u32 internal_mac_transmit_err; 306 u32 good_frames_received; 307 u32 bad_frames_received; 308 u32 broadcast_frames_received; 309 u32 multicast_frames_received; 310 u32 frames_64_octets; 311 u32 frames_65_to_127_octets; 312 u32 frames_128_to_255_octets; 313 u32 frames_256_to_511_octets; 314 u32 frames_512_to_1023_octets; 315 u32 frames_1024_to_max_octets; 316 u64 good_octets_sent; 317 u32 good_frames_sent; 318 u32 excessive_collision; 319 u32 multicast_frames_sent; 320 u32 broadcast_frames_sent; 321 u32 unrec_mac_control_received; 322 u32 fc_sent; 323 u32 good_fc_received; 324 u32 bad_fc_received; 325 u32 undersize_received; 326 u32 fragments_received; 327 u32 oversize_received; 328 u32 jabber_received; 329 u32 mac_receive_error; 330 u32 bad_crc_event; 331 u32 collision; 332 u32 late_collision; 333 /* Non MIB hardware counters */ 334 u32 rx_discard; 335 u32 rx_overrun; 336 }; 337 338 struct rx_queue { 339 int index; 340 341 int rx_ring_size; 342 343 int rx_desc_count; 344 int rx_curr_desc; 345 int rx_used_desc; 346 347 struct rx_desc *rx_desc_area; 348 dma_addr_t rx_desc_dma; 349 int rx_desc_area_size; 350 struct sk_buff **rx_skb; 351 }; 352 353 struct tx_queue { 354 int index; 355 356 int tx_ring_size; 357 358 int tx_desc_count; 359 int tx_curr_desc; 360 int tx_used_desc; 361 362 int tx_stop_threshold; 363 int tx_wake_threshold; 364 365 char *tso_hdrs; 366 dma_addr_t tso_hdrs_dma; 367 368 struct tx_desc *tx_desc_area; 369 char *tx_desc_mapping; /* array to track the type of the dma mapping */ 370 dma_addr_t tx_desc_dma; 371 int tx_desc_area_size; 372 373 struct sk_buff_head tx_skb; 374 375 unsigned long tx_packets; 376 unsigned long tx_bytes; 377 unsigned long tx_dropped; 378 }; 379 380 struct mv643xx_eth_private { 381 struct mv643xx_eth_shared_private *shared; 382 void __iomem *base; 383 int port_num; 384 385 struct net_device *dev; 386 387 struct timer_list mib_counters_timer; 388 spinlock_t mib_counters_lock; 389 struct mib_counters mib_counters; 390 391 struct work_struct tx_timeout_task; 392 393 struct napi_struct napi; 394 u32 int_mask; 395 u8 oom; 396 u8 work_link; 397 u8 work_tx; 398 u8 work_tx_end; 399 u8 work_rx; 400 u8 work_rx_refill; 401 402 int skb_size; 403 404 /* 405 * RX state. 406 */ 407 int rx_ring_size; 408 unsigned long rx_desc_sram_addr; 409 int rx_desc_sram_size; 410 int rxq_count; 411 struct timer_list rx_oom; 412 struct rx_queue rxq[8]; 413 414 /* 415 * TX state. 416 */ 417 int tx_ring_size; 418 unsigned long tx_desc_sram_addr; 419 int tx_desc_sram_size; 420 int txq_count; 421 struct tx_queue txq[8]; 422 423 /* 424 * Hardware-specific parameters. 425 */ 426 struct clk *clk; 427 unsigned int t_clk; 428 }; 429 430 431 /* port register accessors **************************************************/ 432 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset) 433 { 434 return readl(mp->shared->base + offset); 435 } 436 437 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset) 438 { 439 return readl(mp->base + offset); 440 } 441 442 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data) 443 { 444 writel(data, mp->shared->base + offset); 445 } 446 447 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data) 448 { 449 writel(data, mp->base + offset); 450 } 451 452 453 /* rxq/txq helper functions *************************************************/ 454 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) 455 { 456 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]); 457 } 458 459 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) 460 { 461 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]); 462 } 463 464 static void rxq_enable(struct rx_queue *rxq) 465 { 466 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 467 wrlp(mp, RXQ_COMMAND, 1 << rxq->index); 468 } 469 470 static void rxq_disable(struct rx_queue *rxq) 471 { 472 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 473 u8 mask = 1 << rxq->index; 474 475 wrlp(mp, RXQ_COMMAND, mask << 8); 476 while (rdlp(mp, RXQ_COMMAND) & mask) 477 udelay(10); 478 } 479 480 static void txq_reset_hw_ptr(struct tx_queue *txq) 481 { 482 struct mv643xx_eth_private *mp = txq_to_mp(txq); 483 u32 addr; 484 485 addr = (u32)txq->tx_desc_dma; 486 addr += txq->tx_curr_desc * sizeof(struct tx_desc); 487 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr); 488 } 489 490 static void txq_enable(struct tx_queue *txq) 491 { 492 struct mv643xx_eth_private *mp = txq_to_mp(txq); 493 wrlp(mp, TXQ_COMMAND, 1 << txq->index); 494 } 495 496 static void txq_disable(struct tx_queue *txq) 497 { 498 struct mv643xx_eth_private *mp = txq_to_mp(txq); 499 u8 mask = 1 << txq->index; 500 501 wrlp(mp, TXQ_COMMAND, mask << 8); 502 while (rdlp(mp, TXQ_COMMAND) & mask) 503 udelay(10); 504 } 505 506 static void txq_maybe_wake(struct tx_queue *txq) 507 { 508 struct mv643xx_eth_private *mp = txq_to_mp(txq); 509 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 510 511 if (netif_tx_queue_stopped(nq)) { 512 __netif_tx_lock(nq, smp_processor_id()); 513 if (txq->tx_desc_count <= txq->tx_wake_threshold) 514 netif_tx_wake_queue(nq); 515 __netif_tx_unlock(nq); 516 } 517 } 518 519 static int rxq_process(struct rx_queue *rxq, int budget) 520 { 521 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 522 struct net_device_stats *stats = &mp->dev->stats; 523 int rx; 524 525 rx = 0; 526 while (rx < budget && rxq->rx_desc_count) { 527 struct rx_desc *rx_desc; 528 unsigned int cmd_sts; 529 struct sk_buff *skb; 530 u16 byte_cnt; 531 532 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc]; 533 534 cmd_sts = rx_desc->cmd_sts; 535 if (cmd_sts & BUFFER_OWNED_BY_DMA) 536 break; 537 rmb(); 538 539 skb = rxq->rx_skb[rxq->rx_curr_desc]; 540 rxq->rx_skb[rxq->rx_curr_desc] = NULL; 541 542 rxq->rx_curr_desc++; 543 if (rxq->rx_curr_desc == rxq->rx_ring_size) 544 rxq->rx_curr_desc = 0; 545 546 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr, 547 rx_desc->buf_size, DMA_FROM_DEVICE); 548 rxq->rx_desc_count--; 549 rx++; 550 551 mp->work_rx_refill |= 1 << rxq->index; 552 553 byte_cnt = rx_desc->byte_cnt; 554 555 /* 556 * Update statistics. 557 * 558 * Note that the descriptor byte count includes 2 dummy 559 * bytes automatically inserted by the hardware at the 560 * start of the packet (which we don't count), and a 4 561 * byte CRC at the end of the packet (which we do count). 562 */ 563 stats->rx_packets++; 564 stats->rx_bytes += byte_cnt - 2; 565 566 /* 567 * In case we received a packet without first / last bits 568 * on, or the error summary bit is set, the packet needs 569 * to be dropped. 570 */ 571 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY)) 572 != (RX_FIRST_DESC | RX_LAST_DESC)) 573 goto err; 574 575 /* 576 * The -4 is for the CRC in the trailer of the 577 * received packet 578 */ 579 skb_put(skb, byte_cnt - 2 - 4); 580 581 if (cmd_sts & LAYER_4_CHECKSUM_OK) 582 skb->ip_summed = CHECKSUM_UNNECESSARY; 583 skb->protocol = eth_type_trans(skb, mp->dev); 584 585 napi_gro_receive(&mp->napi, skb); 586 587 continue; 588 589 err: 590 stats->rx_dropped++; 591 592 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != 593 (RX_FIRST_DESC | RX_LAST_DESC)) { 594 if (net_ratelimit()) 595 netdev_err(mp->dev, 596 "received packet spanning multiple descriptors\n"); 597 } 598 599 if (cmd_sts & ERROR_SUMMARY) 600 stats->rx_errors++; 601 602 dev_kfree_skb(skb); 603 } 604 605 if (rx < budget) 606 mp->work_rx &= ~(1 << rxq->index); 607 608 return rx; 609 } 610 611 static int rxq_refill(struct rx_queue *rxq, int budget) 612 { 613 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 614 int refilled; 615 616 refilled = 0; 617 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) { 618 struct sk_buff *skb; 619 int rx; 620 struct rx_desc *rx_desc; 621 int size; 622 623 skb = netdev_alloc_skb(mp->dev, mp->skb_size); 624 625 if (skb == NULL) { 626 mp->oom = 1; 627 goto oom; 628 } 629 630 if (SKB_DMA_REALIGN) 631 skb_reserve(skb, SKB_DMA_REALIGN); 632 633 refilled++; 634 rxq->rx_desc_count++; 635 636 rx = rxq->rx_used_desc++; 637 if (rxq->rx_used_desc == rxq->rx_ring_size) 638 rxq->rx_used_desc = 0; 639 640 rx_desc = rxq->rx_desc_area + rx; 641 642 size = skb_end_pointer(skb) - skb->data; 643 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent, 644 skb->data, size, 645 DMA_FROM_DEVICE); 646 rx_desc->buf_size = size; 647 rxq->rx_skb[rx] = skb; 648 wmb(); 649 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT; 650 wmb(); 651 652 /* 653 * The hardware automatically prepends 2 bytes of 654 * dummy data to each received packet, so that the 655 * IP header ends up 16-byte aligned. 656 */ 657 skb_reserve(skb, 2); 658 } 659 660 if (refilled < budget) 661 mp->work_rx_refill &= ~(1 << rxq->index); 662 663 oom: 664 return refilled; 665 } 666 667 668 /* tx ***********************************************************************/ 669 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) 670 { 671 int frag; 672 673 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { 674 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; 675 676 if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7) 677 return 1; 678 } 679 680 return 0; 681 } 682 683 static inline __be16 sum16_as_be(__sum16 sum) 684 { 685 return (__force __be16)sum; 686 } 687 688 static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb, 689 u16 *l4i_chk, u32 *command, int length) 690 { 691 int ret; 692 u32 cmd = 0; 693 694 if (skb->ip_summed == CHECKSUM_PARTIAL) { 695 int hdr_len; 696 int tag_bytes; 697 698 BUG_ON(skb->protocol != htons(ETH_P_IP) && 699 skb->protocol != htons(ETH_P_8021Q)); 700 701 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data; 702 tag_bytes = hdr_len - ETH_HLEN; 703 704 if (length - hdr_len > mp->shared->tx_csum_limit || 705 unlikely(tag_bytes & ~12)) { 706 ret = skb_checksum_help(skb); 707 if (!ret) 708 goto no_csum; 709 return ret; 710 } 711 712 if (tag_bytes & 4) 713 cmd |= MAC_HDR_EXTRA_4_BYTES; 714 if (tag_bytes & 8) 715 cmd |= MAC_HDR_EXTRA_8_BYTES; 716 717 cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL | 718 GEN_IP_V4_CHECKSUM | 719 ip_hdr(skb)->ihl << TX_IHL_SHIFT; 720 721 /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL 722 * it seems we don't need to pass the initial checksum. */ 723 switch (ip_hdr(skb)->protocol) { 724 case IPPROTO_UDP: 725 cmd |= UDP_FRAME; 726 *l4i_chk = 0; 727 break; 728 case IPPROTO_TCP: 729 *l4i_chk = 0; 730 break; 731 default: 732 WARN(1, "protocol not supported"); 733 } 734 } else { 735 no_csum: 736 /* Errata BTS #50, IHL must be 5 if no HW checksum */ 737 cmd |= 5 << TX_IHL_SHIFT; 738 } 739 *command = cmd; 740 return 0; 741 } 742 743 static inline int 744 txq_put_data_tso(struct net_device *dev, struct tx_queue *txq, 745 struct sk_buff *skb, char *data, int length, 746 bool last_tcp, bool is_last) 747 { 748 int tx_index; 749 u32 cmd_sts; 750 struct tx_desc *desc; 751 752 tx_index = txq->tx_curr_desc++; 753 if (txq->tx_curr_desc == txq->tx_ring_size) 754 txq->tx_curr_desc = 0; 755 desc = &txq->tx_desc_area[tx_index]; 756 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 757 758 desc->l4i_chk = 0; 759 desc->byte_cnt = length; 760 761 if (length <= 8 && (uintptr_t)data & 0x7) { 762 /* Copy unaligned small data fragment to TSO header data area */ 763 memcpy(txq->tso_hdrs + tx_index * TSO_HEADER_SIZE, 764 data, length); 765 desc->buf_ptr = txq->tso_hdrs_dma 766 + tx_index * TSO_HEADER_SIZE; 767 } else { 768 /* Alignment is okay, map buffer and hand off to hardware */ 769 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 770 desc->buf_ptr = dma_map_single(dev->dev.parent, data, 771 length, DMA_TO_DEVICE); 772 if (unlikely(dma_mapping_error(dev->dev.parent, 773 desc->buf_ptr))) { 774 WARN(1, "dma_map_single failed!\n"); 775 return -ENOMEM; 776 } 777 } 778 779 cmd_sts = BUFFER_OWNED_BY_DMA; 780 if (last_tcp) { 781 /* last descriptor in the TCP packet */ 782 cmd_sts |= ZERO_PADDING | TX_LAST_DESC; 783 /* last descriptor in SKB */ 784 if (is_last) 785 cmd_sts |= TX_ENABLE_INTERRUPT; 786 } 787 desc->cmd_sts = cmd_sts; 788 return 0; 789 } 790 791 static inline void 792 txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length, 793 u32 *first_cmd_sts, bool first_desc) 794 { 795 struct mv643xx_eth_private *mp = txq_to_mp(txq); 796 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 797 int tx_index; 798 struct tx_desc *desc; 799 int ret; 800 u32 cmd_csum = 0; 801 u16 l4i_chk = 0; 802 u32 cmd_sts; 803 804 tx_index = txq->tx_curr_desc; 805 desc = &txq->tx_desc_area[tx_index]; 806 807 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_csum, length); 808 if (ret) 809 WARN(1, "failed to prepare checksum!"); 810 811 /* Should we set this? Can't use the value from skb_tx_csum() 812 * as it's not the correct initial L4 checksum to use. */ 813 desc->l4i_chk = 0; 814 815 desc->byte_cnt = hdr_len; 816 desc->buf_ptr = txq->tso_hdrs_dma + 817 txq->tx_curr_desc * TSO_HEADER_SIZE; 818 cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC | 819 GEN_CRC; 820 821 /* Defer updating the first command descriptor until all 822 * following descriptors have been written. 823 */ 824 if (first_desc) 825 *first_cmd_sts = cmd_sts; 826 else 827 desc->cmd_sts = cmd_sts; 828 829 txq->tx_curr_desc++; 830 if (txq->tx_curr_desc == txq->tx_ring_size) 831 txq->tx_curr_desc = 0; 832 } 833 834 static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb, 835 struct net_device *dev) 836 { 837 struct mv643xx_eth_private *mp = txq_to_mp(txq); 838 int total_len, data_left, ret; 839 int desc_count = 0; 840 struct tso_t tso; 841 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 842 struct tx_desc *first_tx_desc; 843 u32 first_cmd_sts = 0; 844 845 /* Count needed descriptors */ 846 if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) { 847 netdev_dbg(dev, "not enough descriptors for TSO!\n"); 848 return -EBUSY; 849 } 850 851 first_tx_desc = &txq->tx_desc_area[txq->tx_curr_desc]; 852 853 /* Initialize the TSO handler, and prepare the first payload */ 854 tso_start(skb, &tso); 855 856 total_len = skb->len - hdr_len; 857 while (total_len > 0) { 858 bool first_desc = (desc_count == 0); 859 char *hdr; 860 861 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 862 total_len -= data_left; 863 desc_count++; 864 865 /* prepare packet headers: MAC + IP + TCP */ 866 hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE; 867 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 868 txq_put_hdr_tso(skb, txq, data_left, &first_cmd_sts, 869 first_desc); 870 871 while (data_left > 0) { 872 int size; 873 desc_count++; 874 875 size = min_t(int, tso.size, data_left); 876 ret = txq_put_data_tso(dev, txq, skb, tso.data, size, 877 size == data_left, 878 total_len == 0); 879 if (ret) 880 goto err_release; 881 data_left -= size; 882 tso_build_data(skb, &tso, size); 883 } 884 } 885 886 __skb_queue_tail(&txq->tx_skb, skb); 887 skb_tx_timestamp(skb); 888 889 /* ensure all other descriptors are written before first cmd_sts */ 890 wmb(); 891 first_tx_desc->cmd_sts = first_cmd_sts; 892 893 /* clear TX_END status */ 894 mp->work_tx_end &= ~(1 << txq->index); 895 896 /* ensure all descriptors are written before poking hardware */ 897 wmb(); 898 txq_enable(txq); 899 txq->tx_desc_count += desc_count; 900 return 0; 901 err_release: 902 /* TODO: Release all used data descriptors; header descriptors must not 903 * be DMA-unmapped. 904 */ 905 return ret; 906 } 907 908 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) 909 { 910 struct mv643xx_eth_private *mp = txq_to_mp(txq); 911 int nr_frags = skb_shinfo(skb)->nr_frags; 912 int frag; 913 914 for (frag = 0; frag < nr_frags; frag++) { 915 skb_frag_t *this_frag; 916 int tx_index; 917 struct tx_desc *desc; 918 919 this_frag = &skb_shinfo(skb)->frags[frag]; 920 tx_index = txq->tx_curr_desc++; 921 if (txq->tx_curr_desc == txq->tx_ring_size) 922 txq->tx_curr_desc = 0; 923 desc = &txq->tx_desc_area[tx_index]; 924 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_PAGE; 925 926 /* 927 * The last fragment will generate an interrupt 928 * which will free the skb on TX completion. 929 */ 930 if (frag == nr_frags - 1) { 931 desc->cmd_sts = BUFFER_OWNED_BY_DMA | 932 ZERO_PADDING | TX_LAST_DESC | 933 TX_ENABLE_INTERRUPT; 934 } else { 935 desc->cmd_sts = BUFFER_OWNED_BY_DMA; 936 } 937 938 desc->l4i_chk = 0; 939 desc->byte_cnt = skb_frag_size(this_frag); 940 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent, 941 this_frag, 0, desc->byte_cnt, 942 DMA_TO_DEVICE); 943 } 944 } 945 946 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb, 947 struct net_device *dev) 948 { 949 struct mv643xx_eth_private *mp = txq_to_mp(txq); 950 int nr_frags = skb_shinfo(skb)->nr_frags; 951 int tx_index; 952 struct tx_desc *desc; 953 u32 cmd_sts; 954 u16 l4i_chk; 955 int length, ret; 956 957 cmd_sts = 0; 958 l4i_chk = 0; 959 960 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) { 961 if (net_ratelimit()) 962 netdev_err(dev, "tx queue full?!\n"); 963 return -EBUSY; 964 } 965 966 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len); 967 if (ret) 968 return ret; 969 cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; 970 971 tx_index = txq->tx_curr_desc++; 972 if (txq->tx_curr_desc == txq->tx_ring_size) 973 txq->tx_curr_desc = 0; 974 desc = &txq->tx_desc_area[tx_index]; 975 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 976 977 if (nr_frags) { 978 txq_submit_frag_skb(txq, skb); 979 length = skb_headlen(skb); 980 } else { 981 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT; 982 length = skb->len; 983 } 984 985 desc->l4i_chk = l4i_chk; 986 desc->byte_cnt = length; 987 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data, 988 length, DMA_TO_DEVICE); 989 990 __skb_queue_tail(&txq->tx_skb, skb); 991 992 skb_tx_timestamp(skb); 993 994 /* ensure all other descriptors are written before first cmd_sts */ 995 wmb(); 996 desc->cmd_sts = cmd_sts; 997 998 /* clear TX_END status */ 999 mp->work_tx_end &= ~(1 << txq->index); 1000 1001 /* ensure all descriptors are written before poking hardware */ 1002 wmb(); 1003 txq_enable(txq); 1004 1005 txq->tx_desc_count += nr_frags + 1; 1006 1007 return 0; 1008 } 1009 1010 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev) 1011 { 1012 struct mv643xx_eth_private *mp = netdev_priv(dev); 1013 int length, queue, ret; 1014 struct tx_queue *txq; 1015 struct netdev_queue *nq; 1016 1017 queue = skb_get_queue_mapping(skb); 1018 txq = mp->txq + queue; 1019 nq = netdev_get_tx_queue(dev, queue); 1020 1021 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { 1022 netdev_printk(KERN_DEBUG, dev, 1023 "failed to linearize skb with tiny unaligned fragment\n"); 1024 return NETDEV_TX_BUSY; 1025 } 1026 1027 length = skb->len; 1028 1029 if (skb_is_gso(skb)) 1030 ret = txq_submit_tso(txq, skb, dev); 1031 else 1032 ret = txq_submit_skb(txq, skb, dev); 1033 if (!ret) { 1034 txq->tx_bytes += length; 1035 txq->tx_packets++; 1036 1037 if (txq->tx_desc_count >= txq->tx_stop_threshold) 1038 netif_tx_stop_queue(nq); 1039 } else { 1040 txq->tx_dropped++; 1041 dev_kfree_skb_any(skb); 1042 } 1043 1044 return NETDEV_TX_OK; 1045 } 1046 1047 1048 /* tx napi ******************************************************************/ 1049 static void txq_kick(struct tx_queue *txq) 1050 { 1051 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1052 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1053 u32 hw_desc_ptr; 1054 u32 expected_ptr; 1055 1056 __netif_tx_lock(nq, smp_processor_id()); 1057 1058 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index)) 1059 goto out; 1060 1061 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index)); 1062 expected_ptr = (u32)txq->tx_desc_dma + 1063 txq->tx_curr_desc * sizeof(struct tx_desc); 1064 1065 if (hw_desc_ptr != expected_ptr) 1066 txq_enable(txq); 1067 1068 out: 1069 __netif_tx_unlock(nq); 1070 1071 mp->work_tx_end &= ~(1 << txq->index); 1072 } 1073 1074 static int txq_reclaim(struct tx_queue *txq, int budget, int force) 1075 { 1076 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1077 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1078 int reclaimed; 1079 1080 __netif_tx_lock_bh(nq); 1081 1082 reclaimed = 0; 1083 while (reclaimed < budget && txq->tx_desc_count > 0) { 1084 int tx_index; 1085 struct tx_desc *desc; 1086 u32 cmd_sts; 1087 char desc_dma_map; 1088 1089 tx_index = txq->tx_used_desc; 1090 desc = &txq->tx_desc_area[tx_index]; 1091 desc_dma_map = txq->tx_desc_mapping[tx_index]; 1092 1093 cmd_sts = desc->cmd_sts; 1094 1095 if (cmd_sts & BUFFER_OWNED_BY_DMA) { 1096 if (!force) 1097 break; 1098 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA; 1099 } 1100 1101 txq->tx_used_desc = tx_index + 1; 1102 if (txq->tx_used_desc == txq->tx_ring_size) 1103 txq->tx_used_desc = 0; 1104 1105 reclaimed++; 1106 txq->tx_desc_count--; 1107 1108 if (!IS_TSO_HEADER(txq, desc->buf_ptr)) { 1109 1110 if (desc_dma_map == DESC_DMA_MAP_PAGE) 1111 dma_unmap_page(mp->dev->dev.parent, 1112 desc->buf_ptr, 1113 desc->byte_cnt, 1114 DMA_TO_DEVICE); 1115 else 1116 dma_unmap_single(mp->dev->dev.parent, 1117 desc->buf_ptr, 1118 desc->byte_cnt, 1119 DMA_TO_DEVICE); 1120 } 1121 1122 if (cmd_sts & TX_ENABLE_INTERRUPT) { 1123 struct sk_buff *skb = __skb_dequeue(&txq->tx_skb); 1124 1125 if (!WARN_ON(!skb)) 1126 dev_kfree_skb(skb); 1127 } 1128 1129 if (cmd_sts & ERROR_SUMMARY) { 1130 netdev_info(mp->dev, "tx error\n"); 1131 mp->dev->stats.tx_errors++; 1132 } 1133 1134 } 1135 1136 __netif_tx_unlock_bh(nq); 1137 1138 if (reclaimed < budget) 1139 mp->work_tx &= ~(1 << txq->index); 1140 1141 return reclaimed; 1142 } 1143 1144 1145 /* tx rate control **********************************************************/ 1146 /* 1147 * Set total maximum TX rate (shared by all TX queues for this port) 1148 * to 'rate' bits per second, with a maximum burst of 'burst' bytes. 1149 */ 1150 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst) 1151 { 1152 int token_rate; 1153 int mtu; 1154 int bucket_size; 1155 1156 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 1157 if (token_rate > 1023) 1158 token_rate = 1023; 1159 1160 mtu = (mp->dev->mtu + 255) >> 8; 1161 if (mtu > 63) 1162 mtu = 63; 1163 1164 bucket_size = (burst + 255) >> 8; 1165 if (bucket_size > 65535) 1166 bucket_size = 65535; 1167 1168 switch (mp->shared->tx_bw_control) { 1169 case TX_BW_CONTROL_OLD_LAYOUT: 1170 wrlp(mp, TX_BW_RATE, token_rate); 1171 wrlp(mp, TX_BW_MTU, mtu); 1172 wrlp(mp, TX_BW_BURST, bucket_size); 1173 break; 1174 case TX_BW_CONTROL_NEW_LAYOUT: 1175 wrlp(mp, TX_BW_RATE_MOVED, token_rate); 1176 wrlp(mp, TX_BW_MTU_MOVED, mtu); 1177 wrlp(mp, TX_BW_BURST_MOVED, bucket_size); 1178 break; 1179 } 1180 } 1181 1182 static void txq_set_rate(struct tx_queue *txq, int rate, int burst) 1183 { 1184 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1185 int token_rate; 1186 int bucket_size; 1187 1188 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 1189 if (token_rate > 1023) 1190 token_rate = 1023; 1191 1192 bucket_size = (burst + 255) >> 8; 1193 if (bucket_size > 65535) 1194 bucket_size = 65535; 1195 1196 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14); 1197 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate); 1198 } 1199 1200 static void txq_set_fixed_prio_mode(struct tx_queue *txq) 1201 { 1202 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1203 int off; 1204 u32 val; 1205 1206 /* 1207 * Turn on fixed priority mode. 1208 */ 1209 off = 0; 1210 switch (mp->shared->tx_bw_control) { 1211 case TX_BW_CONTROL_OLD_LAYOUT: 1212 off = TXQ_FIX_PRIO_CONF; 1213 break; 1214 case TX_BW_CONTROL_NEW_LAYOUT: 1215 off = TXQ_FIX_PRIO_CONF_MOVED; 1216 break; 1217 } 1218 1219 if (off) { 1220 val = rdlp(mp, off); 1221 val |= 1 << txq->index; 1222 wrlp(mp, off, val); 1223 } 1224 } 1225 1226 1227 /* mii management interface *************************************************/ 1228 static void mv643xx_eth_adjust_link(struct net_device *dev) 1229 { 1230 struct mv643xx_eth_private *mp = netdev_priv(dev); 1231 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 1232 u32 autoneg_disable = FORCE_LINK_PASS | 1233 DISABLE_AUTO_NEG_SPEED_GMII | 1234 DISABLE_AUTO_NEG_FOR_FLOW_CTRL | 1235 DISABLE_AUTO_NEG_FOR_DUPLEX; 1236 1237 if (dev->phydev->autoneg == AUTONEG_ENABLE) { 1238 /* enable auto negotiation */ 1239 pscr &= ~autoneg_disable; 1240 goto out_write; 1241 } 1242 1243 pscr |= autoneg_disable; 1244 1245 if (dev->phydev->speed == SPEED_1000) { 1246 /* force gigabit, half duplex not supported */ 1247 pscr |= SET_GMII_SPEED_TO_1000; 1248 pscr |= SET_FULL_DUPLEX_MODE; 1249 goto out_write; 1250 } 1251 1252 pscr &= ~SET_GMII_SPEED_TO_1000; 1253 1254 if (dev->phydev->speed == SPEED_100) 1255 pscr |= SET_MII_SPEED_TO_100; 1256 else 1257 pscr &= ~SET_MII_SPEED_TO_100; 1258 1259 if (dev->phydev->duplex == DUPLEX_FULL) 1260 pscr |= SET_FULL_DUPLEX_MODE; 1261 else 1262 pscr &= ~SET_FULL_DUPLEX_MODE; 1263 1264 out_write: 1265 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 1266 } 1267 1268 /* statistics ***************************************************************/ 1269 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) 1270 { 1271 struct mv643xx_eth_private *mp = netdev_priv(dev); 1272 struct net_device_stats *stats = &dev->stats; 1273 unsigned long tx_packets = 0; 1274 unsigned long tx_bytes = 0; 1275 unsigned long tx_dropped = 0; 1276 int i; 1277 1278 for (i = 0; i < mp->txq_count; i++) { 1279 struct tx_queue *txq = mp->txq + i; 1280 1281 tx_packets += txq->tx_packets; 1282 tx_bytes += txq->tx_bytes; 1283 tx_dropped += txq->tx_dropped; 1284 } 1285 1286 stats->tx_packets = tx_packets; 1287 stats->tx_bytes = tx_bytes; 1288 stats->tx_dropped = tx_dropped; 1289 1290 return stats; 1291 } 1292 1293 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset) 1294 { 1295 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset); 1296 } 1297 1298 static void mib_counters_clear(struct mv643xx_eth_private *mp) 1299 { 1300 int i; 1301 1302 for (i = 0; i < 0x80; i += 4) 1303 mib_read(mp, i); 1304 1305 /* Clear non MIB hw counters also */ 1306 rdlp(mp, RX_DISCARD_FRAME_CNT); 1307 rdlp(mp, RX_OVERRUN_FRAME_CNT); 1308 } 1309 1310 static void mib_counters_update(struct mv643xx_eth_private *mp) 1311 { 1312 struct mib_counters *p = &mp->mib_counters; 1313 1314 spin_lock_bh(&mp->mib_counters_lock); 1315 p->good_octets_received += mib_read(mp, 0x00); 1316 p->bad_octets_received += mib_read(mp, 0x08); 1317 p->internal_mac_transmit_err += mib_read(mp, 0x0c); 1318 p->good_frames_received += mib_read(mp, 0x10); 1319 p->bad_frames_received += mib_read(mp, 0x14); 1320 p->broadcast_frames_received += mib_read(mp, 0x18); 1321 p->multicast_frames_received += mib_read(mp, 0x1c); 1322 p->frames_64_octets += mib_read(mp, 0x20); 1323 p->frames_65_to_127_octets += mib_read(mp, 0x24); 1324 p->frames_128_to_255_octets += mib_read(mp, 0x28); 1325 p->frames_256_to_511_octets += mib_read(mp, 0x2c); 1326 p->frames_512_to_1023_octets += mib_read(mp, 0x30); 1327 p->frames_1024_to_max_octets += mib_read(mp, 0x34); 1328 p->good_octets_sent += mib_read(mp, 0x38); 1329 p->good_frames_sent += mib_read(mp, 0x40); 1330 p->excessive_collision += mib_read(mp, 0x44); 1331 p->multicast_frames_sent += mib_read(mp, 0x48); 1332 p->broadcast_frames_sent += mib_read(mp, 0x4c); 1333 p->unrec_mac_control_received += mib_read(mp, 0x50); 1334 p->fc_sent += mib_read(mp, 0x54); 1335 p->good_fc_received += mib_read(mp, 0x58); 1336 p->bad_fc_received += mib_read(mp, 0x5c); 1337 p->undersize_received += mib_read(mp, 0x60); 1338 p->fragments_received += mib_read(mp, 0x64); 1339 p->oversize_received += mib_read(mp, 0x68); 1340 p->jabber_received += mib_read(mp, 0x6c); 1341 p->mac_receive_error += mib_read(mp, 0x70); 1342 p->bad_crc_event += mib_read(mp, 0x74); 1343 p->collision += mib_read(mp, 0x78); 1344 p->late_collision += mib_read(mp, 0x7c); 1345 /* Non MIB hardware counters */ 1346 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT); 1347 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT); 1348 spin_unlock_bh(&mp->mib_counters_lock); 1349 } 1350 1351 static void mib_counters_timer_wrapper(unsigned long _mp) 1352 { 1353 struct mv643xx_eth_private *mp = (void *)_mp; 1354 mib_counters_update(mp); 1355 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); 1356 } 1357 1358 1359 /* interrupt coalescing *****************************************************/ 1360 /* 1361 * Hardware coalescing parameters are set in units of 64 t_clk 1362 * cycles. I.e.: 1363 * 1364 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate 1365 * 1366 * register_value = coal_delay_in_usec * t_clk_rate / 64000000 1367 * 1368 * In the ->set*() methods, we round the computed register value 1369 * to the nearest integer. 1370 */ 1371 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp) 1372 { 1373 u32 val = rdlp(mp, SDMA_CONFIG); 1374 u64 temp; 1375 1376 if (mp->shared->extended_rx_coal_limit) 1377 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7); 1378 else 1379 temp = (val & 0x003fff00) >> 8; 1380 1381 temp *= 64000000; 1382 do_div(temp, mp->t_clk); 1383 1384 return (unsigned int)temp; 1385 } 1386 1387 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1388 { 1389 u64 temp; 1390 u32 val; 1391 1392 temp = (u64)usec * mp->t_clk; 1393 temp += 31999999; 1394 do_div(temp, 64000000); 1395 1396 val = rdlp(mp, SDMA_CONFIG); 1397 if (mp->shared->extended_rx_coal_limit) { 1398 if (temp > 0xffff) 1399 temp = 0xffff; 1400 val &= ~0x023fff80; 1401 val |= (temp & 0x8000) << 10; 1402 val |= (temp & 0x7fff) << 7; 1403 } else { 1404 if (temp > 0x3fff) 1405 temp = 0x3fff; 1406 val &= ~0x003fff00; 1407 val |= (temp & 0x3fff) << 8; 1408 } 1409 wrlp(mp, SDMA_CONFIG, val); 1410 } 1411 1412 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) 1413 { 1414 u64 temp; 1415 1416 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; 1417 temp *= 64000000; 1418 do_div(temp, mp->t_clk); 1419 1420 return (unsigned int)temp; 1421 } 1422 1423 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1424 { 1425 u64 temp; 1426 1427 temp = (u64)usec * mp->t_clk; 1428 temp += 31999999; 1429 do_div(temp, 64000000); 1430 1431 if (temp > 0x3fff) 1432 temp = 0x3fff; 1433 1434 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); 1435 } 1436 1437 1438 /* ethtool ******************************************************************/ 1439 struct mv643xx_eth_stats { 1440 char stat_string[ETH_GSTRING_LEN]; 1441 int sizeof_stat; 1442 int netdev_off; 1443 int mp_off; 1444 }; 1445 1446 #define SSTAT(m) \ 1447 { #m, FIELD_SIZEOF(struct net_device_stats, m), \ 1448 offsetof(struct net_device, stats.m), -1 } 1449 1450 #define MIBSTAT(m) \ 1451 { #m, FIELD_SIZEOF(struct mib_counters, m), \ 1452 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } 1453 1454 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = { 1455 SSTAT(rx_packets), 1456 SSTAT(tx_packets), 1457 SSTAT(rx_bytes), 1458 SSTAT(tx_bytes), 1459 SSTAT(rx_errors), 1460 SSTAT(tx_errors), 1461 SSTAT(rx_dropped), 1462 SSTAT(tx_dropped), 1463 MIBSTAT(good_octets_received), 1464 MIBSTAT(bad_octets_received), 1465 MIBSTAT(internal_mac_transmit_err), 1466 MIBSTAT(good_frames_received), 1467 MIBSTAT(bad_frames_received), 1468 MIBSTAT(broadcast_frames_received), 1469 MIBSTAT(multicast_frames_received), 1470 MIBSTAT(frames_64_octets), 1471 MIBSTAT(frames_65_to_127_octets), 1472 MIBSTAT(frames_128_to_255_octets), 1473 MIBSTAT(frames_256_to_511_octets), 1474 MIBSTAT(frames_512_to_1023_octets), 1475 MIBSTAT(frames_1024_to_max_octets), 1476 MIBSTAT(good_octets_sent), 1477 MIBSTAT(good_frames_sent), 1478 MIBSTAT(excessive_collision), 1479 MIBSTAT(multicast_frames_sent), 1480 MIBSTAT(broadcast_frames_sent), 1481 MIBSTAT(unrec_mac_control_received), 1482 MIBSTAT(fc_sent), 1483 MIBSTAT(good_fc_received), 1484 MIBSTAT(bad_fc_received), 1485 MIBSTAT(undersize_received), 1486 MIBSTAT(fragments_received), 1487 MIBSTAT(oversize_received), 1488 MIBSTAT(jabber_received), 1489 MIBSTAT(mac_receive_error), 1490 MIBSTAT(bad_crc_event), 1491 MIBSTAT(collision), 1492 MIBSTAT(late_collision), 1493 MIBSTAT(rx_discard), 1494 MIBSTAT(rx_overrun), 1495 }; 1496 1497 static int 1498 mv643xx_eth_get_link_ksettings_phy(struct mv643xx_eth_private *mp, 1499 struct ethtool_link_ksettings *cmd) 1500 { 1501 struct net_device *dev = mp->dev; 1502 int err; 1503 u32 supported, advertising; 1504 1505 err = phy_read_status(dev->phydev); 1506 if (err == 0) 1507 err = phy_ethtool_ksettings_get(dev->phydev, cmd); 1508 1509 /* 1510 * The MAC does not support 1000baseT_Half. 1511 */ 1512 ethtool_convert_link_mode_to_legacy_u32(&supported, 1513 cmd->link_modes.supported); 1514 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1515 cmd->link_modes.advertising); 1516 supported &= ~SUPPORTED_1000baseT_Half; 1517 advertising &= ~ADVERTISED_1000baseT_Half; 1518 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1519 supported); 1520 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1521 advertising); 1522 1523 return err; 1524 } 1525 1526 static int 1527 mv643xx_eth_get_link_ksettings_phyless(struct mv643xx_eth_private *mp, 1528 struct ethtool_link_ksettings *cmd) 1529 { 1530 u32 port_status; 1531 u32 supported, advertising; 1532 1533 port_status = rdlp(mp, PORT_STATUS); 1534 1535 supported = SUPPORTED_MII; 1536 advertising = ADVERTISED_MII; 1537 switch (port_status & PORT_SPEED_MASK) { 1538 case PORT_SPEED_10: 1539 cmd->base.speed = SPEED_10; 1540 break; 1541 case PORT_SPEED_100: 1542 cmd->base.speed = SPEED_100; 1543 break; 1544 case PORT_SPEED_1000: 1545 cmd->base.speed = SPEED_1000; 1546 break; 1547 default: 1548 cmd->base.speed = -1; 1549 break; 1550 } 1551 cmd->base.duplex = (port_status & FULL_DUPLEX) ? 1552 DUPLEX_FULL : DUPLEX_HALF; 1553 cmd->base.port = PORT_MII; 1554 cmd->base.phy_address = 0; 1555 cmd->base.autoneg = AUTONEG_DISABLE; 1556 1557 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1558 supported); 1559 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1560 advertising); 1561 1562 return 0; 1563 } 1564 1565 static void 1566 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1567 { 1568 wol->supported = 0; 1569 wol->wolopts = 0; 1570 if (dev->phydev) 1571 phy_ethtool_get_wol(dev->phydev, wol); 1572 } 1573 1574 static int 1575 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1576 { 1577 int err; 1578 1579 if (!dev->phydev) 1580 return -EOPNOTSUPP; 1581 1582 err = phy_ethtool_set_wol(dev->phydev, wol); 1583 /* Given that mv643xx_eth works without the marvell-specific PHY driver, 1584 * this debugging hint is useful to have. 1585 */ 1586 if (err == -EOPNOTSUPP) 1587 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n"); 1588 return err; 1589 } 1590 1591 static int 1592 mv643xx_eth_get_link_ksettings(struct net_device *dev, 1593 struct ethtool_link_ksettings *cmd) 1594 { 1595 struct mv643xx_eth_private *mp = netdev_priv(dev); 1596 1597 if (dev->phydev) 1598 return mv643xx_eth_get_link_ksettings_phy(mp, cmd); 1599 else 1600 return mv643xx_eth_get_link_ksettings_phyless(mp, cmd); 1601 } 1602 1603 static int 1604 mv643xx_eth_set_link_ksettings(struct net_device *dev, 1605 const struct ethtool_link_ksettings *cmd) 1606 { 1607 struct ethtool_link_ksettings c = *cmd; 1608 u32 advertising; 1609 int ret; 1610 1611 if (!dev->phydev) 1612 return -EINVAL; 1613 1614 /* 1615 * The MAC does not support 1000baseT_Half. 1616 */ 1617 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1618 c.link_modes.advertising); 1619 advertising &= ~ADVERTISED_1000baseT_Half; 1620 ethtool_convert_legacy_u32_to_link_mode(c.link_modes.advertising, 1621 advertising); 1622 1623 ret = phy_ethtool_ksettings_set(dev->phydev, &c); 1624 if (!ret) 1625 mv643xx_eth_adjust_link(dev); 1626 return ret; 1627 } 1628 1629 static void mv643xx_eth_get_drvinfo(struct net_device *dev, 1630 struct ethtool_drvinfo *drvinfo) 1631 { 1632 strlcpy(drvinfo->driver, mv643xx_eth_driver_name, 1633 sizeof(drvinfo->driver)); 1634 strlcpy(drvinfo->version, mv643xx_eth_driver_version, 1635 sizeof(drvinfo->version)); 1636 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 1637 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 1638 } 1639 1640 static int mv643xx_eth_nway_reset(struct net_device *dev) 1641 { 1642 if (!dev->phydev) 1643 return -EINVAL; 1644 1645 return genphy_restart_aneg(dev->phydev); 1646 } 1647 1648 static int 1649 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1650 { 1651 struct mv643xx_eth_private *mp = netdev_priv(dev); 1652 1653 ec->rx_coalesce_usecs = get_rx_coal(mp); 1654 ec->tx_coalesce_usecs = get_tx_coal(mp); 1655 1656 return 0; 1657 } 1658 1659 static int 1660 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1661 { 1662 struct mv643xx_eth_private *mp = netdev_priv(dev); 1663 1664 set_rx_coal(mp, ec->rx_coalesce_usecs); 1665 set_tx_coal(mp, ec->tx_coalesce_usecs); 1666 1667 return 0; 1668 } 1669 1670 static void 1671 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1672 { 1673 struct mv643xx_eth_private *mp = netdev_priv(dev); 1674 1675 er->rx_max_pending = 4096; 1676 er->tx_max_pending = 4096; 1677 1678 er->rx_pending = mp->rx_ring_size; 1679 er->tx_pending = mp->tx_ring_size; 1680 } 1681 1682 static int 1683 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1684 { 1685 struct mv643xx_eth_private *mp = netdev_priv(dev); 1686 1687 if (er->rx_mini_pending || er->rx_jumbo_pending) 1688 return -EINVAL; 1689 1690 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096; 1691 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending, 1692 MV643XX_MAX_SKB_DESCS * 2, 4096); 1693 if (mp->tx_ring_size != er->tx_pending) 1694 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 1695 mp->tx_ring_size, er->tx_pending); 1696 1697 if (netif_running(dev)) { 1698 mv643xx_eth_stop(dev); 1699 if (mv643xx_eth_open(dev)) { 1700 netdev_err(dev, 1701 "fatal error on re-opening device after ring param change\n"); 1702 return -ENOMEM; 1703 } 1704 } 1705 1706 return 0; 1707 } 1708 1709 1710 static int 1711 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) 1712 { 1713 struct mv643xx_eth_private *mp = netdev_priv(dev); 1714 bool rx_csum = features & NETIF_F_RXCSUM; 1715 1716 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); 1717 1718 return 0; 1719 } 1720 1721 static void mv643xx_eth_get_strings(struct net_device *dev, 1722 uint32_t stringset, uint8_t *data) 1723 { 1724 int i; 1725 1726 if (stringset == ETH_SS_STATS) { 1727 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1728 memcpy(data + i * ETH_GSTRING_LEN, 1729 mv643xx_eth_stats[i].stat_string, 1730 ETH_GSTRING_LEN); 1731 } 1732 } 1733 } 1734 1735 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, 1736 struct ethtool_stats *stats, 1737 uint64_t *data) 1738 { 1739 struct mv643xx_eth_private *mp = netdev_priv(dev); 1740 int i; 1741 1742 mv643xx_eth_get_stats(dev); 1743 mib_counters_update(mp); 1744 1745 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1746 const struct mv643xx_eth_stats *stat; 1747 void *p; 1748 1749 stat = mv643xx_eth_stats + i; 1750 1751 if (stat->netdev_off >= 0) 1752 p = ((void *)mp->dev) + stat->netdev_off; 1753 else 1754 p = ((void *)mp) + stat->mp_off; 1755 1756 data[i] = (stat->sizeof_stat == 8) ? 1757 *(uint64_t *)p : *(uint32_t *)p; 1758 } 1759 } 1760 1761 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset) 1762 { 1763 if (sset == ETH_SS_STATS) 1764 return ARRAY_SIZE(mv643xx_eth_stats); 1765 1766 return -EOPNOTSUPP; 1767 } 1768 1769 static const struct ethtool_ops mv643xx_eth_ethtool_ops = { 1770 .get_drvinfo = mv643xx_eth_get_drvinfo, 1771 .nway_reset = mv643xx_eth_nway_reset, 1772 .get_link = ethtool_op_get_link, 1773 .get_coalesce = mv643xx_eth_get_coalesce, 1774 .set_coalesce = mv643xx_eth_set_coalesce, 1775 .get_ringparam = mv643xx_eth_get_ringparam, 1776 .set_ringparam = mv643xx_eth_set_ringparam, 1777 .get_strings = mv643xx_eth_get_strings, 1778 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, 1779 .get_sset_count = mv643xx_eth_get_sset_count, 1780 .get_ts_info = ethtool_op_get_ts_info, 1781 .get_wol = mv643xx_eth_get_wol, 1782 .set_wol = mv643xx_eth_set_wol, 1783 .get_link_ksettings = mv643xx_eth_get_link_ksettings, 1784 .set_link_ksettings = mv643xx_eth_set_link_ksettings, 1785 }; 1786 1787 1788 /* address handling *********************************************************/ 1789 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr) 1790 { 1791 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH); 1792 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW); 1793 1794 addr[0] = (mac_h >> 24) & 0xff; 1795 addr[1] = (mac_h >> 16) & 0xff; 1796 addr[2] = (mac_h >> 8) & 0xff; 1797 addr[3] = mac_h & 0xff; 1798 addr[4] = (mac_l >> 8) & 0xff; 1799 addr[5] = mac_l & 0xff; 1800 } 1801 1802 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr) 1803 { 1804 wrlp(mp, MAC_ADDR_HIGH, 1805 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); 1806 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]); 1807 } 1808 1809 static u32 uc_addr_filter_mask(struct net_device *dev) 1810 { 1811 struct netdev_hw_addr *ha; 1812 u32 nibbles; 1813 1814 if (dev->flags & IFF_PROMISC) 1815 return 0; 1816 1817 nibbles = 1 << (dev->dev_addr[5] & 0x0f); 1818 netdev_for_each_uc_addr(ha, dev) { 1819 if (memcmp(dev->dev_addr, ha->addr, 5)) 1820 return 0; 1821 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) 1822 return 0; 1823 1824 nibbles |= 1 << (ha->addr[5] & 0x0f); 1825 } 1826 1827 return nibbles; 1828 } 1829 1830 static void mv643xx_eth_program_unicast_filter(struct net_device *dev) 1831 { 1832 struct mv643xx_eth_private *mp = netdev_priv(dev); 1833 u32 port_config; 1834 u32 nibbles; 1835 int i; 1836 1837 uc_addr_set(mp, dev->dev_addr); 1838 1839 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; 1840 1841 nibbles = uc_addr_filter_mask(dev); 1842 if (!nibbles) { 1843 port_config |= UNICAST_PROMISCUOUS_MODE; 1844 nibbles = 0xffff; 1845 } 1846 1847 for (i = 0; i < 16; i += 4) { 1848 int off = UNICAST_TABLE(mp->port_num) + i; 1849 u32 v; 1850 1851 v = 0; 1852 if (nibbles & 1) 1853 v |= 0x00000001; 1854 if (nibbles & 2) 1855 v |= 0x00000100; 1856 if (nibbles & 4) 1857 v |= 0x00010000; 1858 if (nibbles & 8) 1859 v |= 0x01000000; 1860 nibbles >>= 4; 1861 1862 wrl(mp, off, v); 1863 } 1864 1865 wrlp(mp, PORT_CONFIG, port_config); 1866 } 1867 1868 static int addr_crc(unsigned char *addr) 1869 { 1870 int crc = 0; 1871 int i; 1872 1873 for (i = 0; i < 6; i++) { 1874 int j; 1875 1876 crc = (crc ^ addr[i]) << 8; 1877 for (j = 7; j >= 0; j--) { 1878 if (crc & (0x100 << j)) 1879 crc ^= 0x107 << j; 1880 } 1881 } 1882 1883 return crc; 1884 } 1885 1886 static void mv643xx_eth_program_multicast_filter(struct net_device *dev) 1887 { 1888 struct mv643xx_eth_private *mp = netdev_priv(dev); 1889 u32 *mc_spec; 1890 u32 *mc_other; 1891 struct netdev_hw_addr *ha; 1892 int i; 1893 1894 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) 1895 goto promiscuous; 1896 1897 /* Allocate both mc_spec and mc_other tables */ 1898 mc_spec = kcalloc(128, sizeof(u32), GFP_ATOMIC); 1899 if (!mc_spec) 1900 goto promiscuous; 1901 mc_other = &mc_spec[64]; 1902 1903 netdev_for_each_mc_addr(ha, dev) { 1904 u8 *a = ha->addr; 1905 u32 *table; 1906 u8 entry; 1907 1908 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { 1909 table = mc_spec; 1910 entry = a[5]; 1911 } else { 1912 table = mc_other; 1913 entry = addr_crc(a); 1914 } 1915 1916 table[entry >> 2] |= 1 << (8 * (entry & 3)); 1917 } 1918 1919 for (i = 0; i < 64; i++) { 1920 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1921 mc_spec[i]); 1922 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1923 mc_other[i]); 1924 } 1925 1926 kfree(mc_spec); 1927 return; 1928 1929 promiscuous: 1930 for (i = 0; i < 64; i++) { 1931 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1932 0x01010101u); 1933 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1934 0x01010101u); 1935 } 1936 } 1937 1938 static void mv643xx_eth_set_rx_mode(struct net_device *dev) 1939 { 1940 mv643xx_eth_program_unicast_filter(dev); 1941 mv643xx_eth_program_multicast_filter(dev); 1942 } 1943 1944 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) 1945 { 1946 struct sockaddr *sa = addr; 1947 1948 if (!is_valid_ether_addr(sa->sa_data)) 1949 return -EADDRNOTAVAIL; 1950 1951 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); 1952 1953 netif_addr_lock_bh(dev); 1954 mv643xx_eth_program_unicast_filter(dev); 1955 netif_addr_unlock_bh(dev); 1956 1957 return 0; 1958 } 1959 1960 1961 /* rx/tx queue initialisation ***********************************************/ 1962 static int rxq_init(struct mv643xx_eth_private *mp, int index) 1963 { 1964 struct rx_queue *rxq = mp->rxq + index; 1965 struct rx_desc *rx_desc; 1966 int size; 1967 int i; 1968 1969 rxq->index = index; 1970 1971 rxq->rx_ring_size = mp->rx_ring_size; 1972 1973 rxq->rx_desc_count = 0; 1974 rxq->rx_curr_desc = 0; 1975 rxq->rx_used_desc = 0; 1976 1977 size = rxq->rx_ring_size * sizeof(struct rx_desc); 1978 1979 if (index == 0 && size <= mp->rx_desc_sram_size) { 1980 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr, 1981 mp->rx_desc_sram_size); 1982 rxq->rx_desc_dma = mp->rx_desc_sram_addr; 1983 } else { 1984 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1985 size, &rxq->rx_desc_dma, 1986 GFP_KERNEL); 1987 } 1988 1989 if (rxq->rx_desc_area == NULL) { 1990 netdev_err(mp->dev, 1991 "can't allocate rx ring (%d bytes)\n", size); 1992 goto out; 1993 } 1994 memset(rxq->rx_desc_area, 0, size); 1995 1996 rxq->rx_desc_area_size = size; 1997 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb), 1998 GFP_KERNEL); 1999 if (rxq->rx_skb == NULL) 2000 goto out_free; 2001 2002 rx_desc = rxq->rx_desc_area; 2003 for (i = 0; i < rxq->rx_ring_size; i++) { 2004 int nexti; 2005 2006 nexti = i + 1; 2007 if (nexti == rxq->rx_ring_size) 2008 nexti = 0; 2009 2010 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma + 2011 nexti * sizeof(struct rx_desc); 2012 } 2013 2014 return 0; 2015 2016 2017 out_free: 2018 if (index == 0 && size <= mp->rx_desc_sram_size) 2019 iounmap(rxq->rx_desc_area); 2020 else 2021 dma_free_coherent(mp->dev->dev.parent, size, 2022 rxq->rx_desc_area, 2023 rxq->rx_desc_dma); 2024 2025 out: 2026 return -ENOMEM; 2027 } 2028 2029 static void rxq_deinit(struct rx_queue *rxq) 2030 { 2031 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 2032 int i; 2033 2034 rxq_disable(rxq); 2035 2036 for (i = 0; i < rxq->rx_ring_size; i++) { 2037 if (rxq->rx_skb[i]) { 2038 dev_kfree_skb(rxq->rx_skb[i]); 2039 rxq->rx_desc_count--; 2040 } 2041 } 2042 2043 if (rxq->rx_desc_count) { 2044 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n", 2045 rxq->rx_desc_count); 2046 } 2047 2048 if (rxq->index == 0 && 2049 rxq->rx_desc_area_size <= mp->rx_desc_sram_size) 2050 iounmap(rxq->rx_desc_area); 2051 else 2052 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, 2053 rxq->rx_desc_area, rxq->rx_desc_dma); 2054 2055 kfree(rxq->rx_skb); 2056 } 2057 2058 static int txq_init(struct mv643xx_eth_private *mp, int index) 2059 { 2060 struct tx_queue *txq = mp->txq + index; 2061 struct tx_desc *tx_desc; 2062 int size; 2063 int ret; 2064 int i; 2065 2066 txq->index = index; 2067 2068 txq->tx_ring_size = mp->tx_ring_size; 2069 2070 /* A queue must always have room for at least one skb. 2071 * Therefore, stop the queue when the free entries reaches 2072 * the maximum number of descriptors per skb. 2073 */ 2074 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS; 2075 txq->tx_wake_threshold = txq->tx_stop_threshold / 2; 2076 2077 txq->tx_desc_count = 0; 2078 txq->tx_curr_desc = 0; 2079 txq->tx_used_desc = 0; 2080 2081 size = txq->tx_ring_size * sizeof(struct tx_desc); 2082 2083 if (index == 0 && size <= mp->tx_desc_sram_size) { 2084 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, 2085 mp->tx_desc_sram_size); 2086 txq->tx_desc_dma = mp->tx_desc_sram_addr; 2087 } else { 2088 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 2089 size, &txq->tx_desc_dma, 2090 GFP_KERNEL); 2091 } 2092 2093 if (txq->tx_desc_area == NULL) { 2094 netdev_err(mp->dev, 2095 "can't allocate tx ring (%d bytes)\n", size); 2096 return -ENOMEM; 2097 } 2098 memset(txq->tx_desc_area, 0, size); 2099 2100 txq->tx_desc_area_size = size; 2101 2102 tx_desc = txq->tx_desc_area; 2103 for (i = 0; i < txq->tx_ring_size; i++) { 2104 struct tx_desc *txd = tx_desc + i; 2105 int nexti; 2106 2107 nexti = i + 1; 2108 if (nexti == txq->tx_ring_size) 2109 nexti = 0; 2110 2111 txd->cmd_sts = 0; 2112 txd->next_desc_ptr = txq->tx_desc_dma + 2113 nexti * sizeof(struct tx_desc); 2114 } 2115 2116 txq->tx_desc_mapping = kcalloc(txq->tx_ring_size, sizeof(char), 2117 GFP_KERNEL); 2118 if (!txq->tx_desc_mapping) { 2119 ret = -ENOMEM; 2120 goto err_free_desc_area; 2121 } 2122 2123 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ 2124 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent, 2125 txq->tx_ring_size * TSO_HEADER_SIZE, 2126 &txq->tso_hdrs_dma, GFP_KERNEL); 2127 if (txq->tso_hdrs == NULL) { 2128 ret = -ENOMEM; 2129 goto err_free_desc_mapping; 2130 } 2131 skb_queue_head_init(&txq->tx_skb); 2132 2133 return 0; 2134 2135 err_free_desc_mapping: 2136 kfree(txq->tx_desc_mapping); 2137 err_free_desc_area: 2138 if (index == 0 && size <= mp->tx_desc_sram_size) 2139 iounmap(txq->tx_desc_area); 2140 else 2141 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2142 txq->tx_desc_area, txq->tx_desc_dma); 2143 return ret; 2144 } 2145 2146 static void txq_deinit(struct tx_queue *txq) 2147 { 2148 struct mv643xx_eth_private *mp = txq_to_mp(txq); 2149 2150 txq_disable(txq); 2151 txq_reclaim(txq, txq->tx_ring_size, 1); 2152 2153 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); 2154 2155 if (txq->index == 0 && 2156 txq->tx_desc_area_size <= mp->tx_desc_sram_size) 2157 iounmap(txq->tx_desc_area); 2158 else 2159 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2160 txq->tx_desc_area, txq->tx_desc_dma); 2161 kfree(txq->tx_desc_mapping); 2162 2163 if (txq->tso_hdrs) 2164 dma_free_coherent(mp->dev->dev.parent, 2165 txq->tx_ring_size * TSO_HEADER_SIZE, 2166 txq->tso_hdrs, txq->tso_hdrs_dma); 2167 } 2168 2169 2170 /* netdev ops and related ***************************************************/ 2171 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) 2172 { 2173 u32 int_cause; 2174 u32 int_cause_ext; 2175 2176 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; 2177 if (int_cause == 0) 2178 return 0; 2179 2180 int_cause_ext = 0; 2181 if (int_cause & INT_EXT) { 2182 int_cause &= ~INT_EXT; 2183 int_cause_ext = rdlp(mp, INT_CAUSE_EXT); 2184 } 2185 2186 if (int_cause) { 2187 wrlp(mp, INT_CAUSE, ~int_cause); 2188 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & 2189 ~(rdlp(mp, TXQ_COMMAND) & 0xff); 2190 mp->work_rx |= (int_cause & INT_RX) >> 2; 2191 } 2192 2193 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; 2194 if (int_cause_ext) { 2195 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); 2196 if (int_cause_ext & INT_EXT_LINK_PHY) 2197 mp->work_link = 1; 2198 mp->work_tx |= int_cause_ext & INT_EXT_TX; 2199 } 2200 2201 return 1; 2202 } 2203 2204 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) 2205 { 2206 struct net_device *dev = (struct net_device *)dev_id; 2207 struct mv643xx_eth_private *mp = netdev_priv(dev); 2208 2209 if (unlikely(!mv643xx_eth_collect_events(mp))) 2210 return IRQ_NONE; 2211 2212 wrlp(mp, INT_MASK, 0); 2213 napi_schedule(&mp->napi); 2214 2215 return IRQ_HANDLED; 2216 } 2217 2218 static void handle_link_event(struct mv643xx_eth_private *mp) 2219 { 2220 struct net_device *dev = mp->dev; 2221 u32 port_status; 2222 int speed; 2223 int duplex; 2224 int fc; 2225 2226 port_status = rdlp(mp, PORT_STATUS); 2227 if (!(port_status & LINK_UP)) { 2228 if (netif_carrier_ok(dev)) { 2229 int i; 2230 2231 netdev_info(dev, "link down\n"); 2232 2233 netif_carrier_off(dev); 2234 2235 for (i = 0; i < mp->txq_count; i++) { 2236 struct tx_queue *txq = mp->txq + i; 2237 2238 txq_reclaim(txq, txq->tx_ring_size, 1); 2239 txq_reset_hw_ptr(txq); 2240 } 2241 } 2242 return; 2243 } 2244 2245 switch (port_status & PORT_SPEED_MASK) { 2246 case PORT_SPEED_10: 2247 speed = 10; 2248 break; 2249 case PORT_SPEED_100: 2250 speed = 100; 2251 break; 2252 case PORT_SPEED_1000: 2253 speed = 1000; 2254 break; 2255 default: 2256 speed = -1; 2257 break; 2258 } 2259 duplex = (port_status & FULL_DUPLEX) ? 1 : 0; 2260 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; 2261 2262 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n", 2263 speed, duplex ? "full" : "half", fc ? "en" : "dis"); 2264 2265 if (!netif_carrier_ok(dev)) 2266 netif_carrier_on(dev); 2267 } 2268 2269 static int mv643xx_eth_poll(struct napi_struct *napi, int budget) 2270 { 2271 struct mv643xx_eth_private *mp; 2272 int work_done; 2273 2274 mp = container_of(napi, struct mv643xx_eth_private, napi); 2275 2276 if (unlikely(mp->oom)) { 2277 mp->oom = 0; 2278 del_timer(&mp->rx_oom); 2279 } 2280 2281 work_done = 0; 2282 while (work_done < budget) { 2283 u8 queue_mask; 2284 int queue; 2285 int work_tbd; 2286 2287 if (mp->work_link) { 2288 mp->work_link = 0; 2289 handle_link_event(mp); 2290 work_done++; 2291 continue; 2292 } 2293 2294 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; 2295 if (likely(!mp->oom)) 2296 queue_mask |= mp->work_rx_refill; 2297 2298 if (!queue_mask) { 2299 if (mv643xx_eth_collect_events(mp)) 2300 continue; 2301 break; 2302 } 2303 2304 queue = fls(queue_mask) - 1; 2305 queue_mask = 1 << queue; 2306 2307 work_tbd = budget - work_done; 2308 if (work_tbd > 16) 2309 work_tbd = 16; 2310 2311 if (mp->work_tx_end & queue_mask) { 2312 txq_kick(mp->txq + queue); 2313 } else if (mp->work_tx & queue_mask) { 2314 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); 2315 txq_maybe_wake(mp->txq + queue); 2316 } else if (mp->work_rx & queue_mask) { 2317 work_done += rxq_process(mp->rxq + queue, work_tbd); 2318 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { 2319 work_done += rxq_refill(mp->rxq + queue, work_tbd); 2320 } else { 2321 BUG(); 2322 } 2323 } 2324 2325 if (work_done < budget) { 2326 if (mp->oom) 2327 mod_timer(&mp->rx_oom, jiffies + (HZ / 10)); 2328 napi_complete(napi); 2329 wrlp(mp, INT_MASK, mp->int_mask); 2330 } 2331 2332 return work_done; 2333 } 2334 2335 static inline void oom_timer_wrapper(unsigned long data) 2336 { 2337 struct mv643xx_eth_private *mp = (void *)data; 2338 2339 napi_schedule(&mp->napi); 2340 } 2341 2342 static void port_start(struct mv643xx_eth_private *mp) 2343 { 2344 struct net_device *dev = mp->dev; 2345 u32 pscr; 2346 int i; 2347 2348 /* 2349 * Perform PHY reset, if there is a PHY. 2350 */ 2351 if (dev->phydev) { 2352 struct ethtool_link_ksettings cmd; 2353 2354 mv643xx_eth_get_link_ksettings(dev, &cmd); 2355 phy_init_hw(dev->phydev); 2356 mv643xx_eth_set_link_ksettings( 2357 dev, (const struct ethtool_link_ksettings *)&cmd); 2358 phy_start(dev->phydev); 2359 } 2360 2361 /* 2362 * Configure basic link parameters. 2363 */ 2364 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2365 2366 pscr |= SERIAL_PORT_ENABLE; 2367 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2368 2369 pscr |= DO_NOT_FORCE_LINK_FAIL; 2370 if (!dev->phydev) 2371 pscr |= FORCE_LINK_PASS; 2372 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2373 2374 /* 2375 * Configure TX path and queues. 2376 */ 2377 tx_set_rate(mp, 1000000000, 16777216); 2378 for (i = 0; i < mp->txq_count; i++) { 2379 struct tx_queue *txq = mp->txq + i; 2380 2381 txq_reset_hw_ptr(txq); 2382 txq_set_rate(txq, 1000000000, 16777216); 2383 txq_set_fixed_prio_mode(txq); 2384 } 2385 2386 /* 2387 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast 2388 * frames to RX queue #0, and include the pseudo-header when 2389 * calculating receive checksums. 2390 */ 2391 mv643xx_eth_set_features(mp->dev, mp->dev->features); 2392 2393 /* 2394 * Treat BPDUs as normal multicasts, and disable partition mode. 2395 */ 2396 wrlp(mp, PORT_CONFIG_EXT, 0x00000000); 2397 2398 /* 2399 * Add configured unicast addresses to address filter table. 2400 */ 2401 mv643xx_eth_program_unicast_filter(mp->dev); 2402 2403 /* 2404 * Enable the receive queues. 2405 */ 2406 for (i = 0; i < mp->rxq_count; i++) { 2407 struct rx_queue *rxq = mp->rxq + i; 2408 u32 addr; 2409 2410 addr = (u32)rxq->rx_desc_dma; 2411 addr += rxq->rx_curr_desc * sizeof(struct rx_desc); 2412 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr); 2413 2414 rxq_enable(rxq); 2415 } 2416 } 2417 2418 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp) 2419 { 2420 int skb_size; 2421 2422 /* 2423 * Reserve 2+14 bytes for an ethernet header (the hardware 2424 * automatically prepends 2 bytes of dummy data to each 2425 * received packet), 16 bytes for up to four VLAN tags, and 2426 * 4 bytes for the trailing FCS -- 36 bytes total. 2427 */ 2428 skb_size = mp->dev->mtu + 36; 2429 2430 /* 2431 * Make sure that the skb size is a multiple of 8 bytes, as 2432 * the lower three bits of the receive descriptor's buffer 2433 * size field are ignored by the hardware. 2434 */ 2435 mp->skb_size = (skb_size + 7) & ~7; 2436 2437 /* 2438 * If NET_SKB_PAD is smaller than a cache line, 2439 * netdev_alloc_skb() will cause skb->data to be misaligned 2440 * to a cache line boundary. If this is the case, include 2441 * some extra space to allow re-aligning the data area. 2442 */ 2443 mp->skb_size += SKB_DMA_REALIGN; 2444 } 2445 2446 static int mv643xx_eth_open(struct net_device *dev) 2447 { 2448 struct mv643xx_eth_private *mp = netdev_priv(dev); 2449 int err; 2450 int i; 2451 2452 wrlp(mp, INT_CAUSE, 0); 2453 wrlp(mp, INT_CAUSE_EXT, 0); 2454 rdlp(mp, INT_CAUSE_EXT); 2455 2456 err = request_irq(dev->irq, mv643xx_eth_irq, 2457 IRQF_SHARED, dev->name, dev); 2458 if (err) { 2459 netdev_err(dev, "can't assign irq\n"); 2460 return -EAGAIN; 2461 } 2462 2463 mv643xx_eth_recalc_skb_size(mp); 2464 2465 napi_enable(&mp->napi); 2466 2467 mp->int_mask = INT_EXT; 2468 2469 for (i = 0; i < mp->rxq_count; i++) { 2470 err = rxq_init(mp, i); 2471 if (err) { 2472 while (--i >= 0) 2473 rxq_deinit(mp->rxq + i); 2474 goto out; 2475 } 2476 2477 rxq_refill(mp->rxq + i, INT_MAX); 2478 mp->int_mask |= INT_RX_0 << i; 2479 } 2480 2481 if (mp->oom) { 2482 mp->rx_oom.expires = jiffies + (HZ / 10); 2483 add_timer(&mp->rx_oom); 2484 } 2485 2486 for (i = 0; i < mp->txq_count; i++) { 2487 err = txq_init(mp, i); 2488 if (err) { 2489 while (--i >= 0) 2490 txq_deinit(mp->txq + i); 2491 goto out_free; 2492 } 2493 mp->int_mask |= INT_TX_END_0 << i; 2494 } 2495 2496 add_timer(&mp->mib_counters_timer); 2497 port_start(mp); 2498 2499 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); 2500 wrlp(mp, INT_MASK, mp->int_mask); 2501 2502 return 0; 2503 2504 2505 out_free: 2506 for (i = 0; i < mp->rxq_count; i++) 2507 rxq_deinit(mp->rxq + i); 2508 out: 2509 free_irq(dev->irq, dev); 2510 2511 return err; 2512 } 2513 2514 static void port_reset(struct mv643xx_eth_private *mp) 2515 { 2516 unsigned int data; 2517 int i; 2518 2519 for (i = 0; i < mp->rxq_count; i++) 2520 rxq_disable(mp->rxq + i); 2521 for (i = 0; i < mp->txq_count; i++) 2522 txq_disable(mp->txq + i); 2523 2524 while (1) { 2525 u32 ps = rdlp(mp, PORT_STATUS); 2526 2527 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) 2528 break; 2529 udelay(10); 2530 } 2531 2532 /* Reset the Enable bit in the Configuration Register */ 2533 data = rdlp(mp, PORT_SERIAL_CONTROL); 2534 data &= ~(SERIAL_PORT_ENABLE | 2535 DO_NOT_FORCE_LINK_FAIL | 2536 FORCE_LINK_PASS); 2537 wrlp(mp, PORT_SERIAL_CONTROL, data); 2538 } 2539 2540 static int mv643xx_eth_stop(struct net_device *dev) 2541 { 2542 struct mv643xx_eth_private *mp = netdev_priv(dev); 2543 int i; 2544 2545 wrlp(mp, INT_MASK_EXT, 0x00000000); 2546 wrlp(mp, INT_MASK, 0x00000000); 2547 rdlp(mp, INT_MASK); 2548 2549 napi_disable(&mp->napi); 2550 2551 del_timer_sync(&mp->rx_oom); 2552 2553 netif_carrier_off(dev); 2554 if (dev->phydev) 2555 phy_stop(dev->phydev); 2556 free_irq(dev->irq, dev); 2557 2558 port_reset(mp); 2559 mv643xx_eth_get_stats(dev); 2560 mib_counters_update(mp); 2561 del_timer_sync(&mp->mib_counters_timer); 2562 2563 for (i = 0; i < mp->rxq_count; i++) 2564 rxq_deinit(mp->rxq + i); 2565 for (i = 0; i < mp->txq_count; i++) 2566 txq_deinit(mp->txq + i); 2567 2568 return 0; 2569 } 2570 2571 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2572 { 2573 int ret; 2574 2575 if (!dev->phydev) 2576 return -ENOTSUPP; 2577 2578 ret = phy_mii_ioctl(dev->phydev, ifr, cmd); 2579 if (!ret) 2580 mv643xx_eth_adjust_link(dev); 2581 return ret; 2582 } 2583 2584 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 2585 { 2586 struct mv643xx_eth_private *mp = netdev_priv(dev); 2587 2588 if (new_mtu < 64 || new_mtu > 9500) 2589 return -EINVAL; 2590 2591 dev->mtu = new_mtu; 2592 mv643xx_eth_recalc_skb_size(mp); 2593 tx_set_rate(mp, 1000000000, 16777216); 2594 2595 if (!netif_running(dev)) 2596 return 0; 2597 2598 /* 2599 * Stop and then re-open the interface. This will allocate RX 2600 * skbs of the new MTU. 2601 * There is a possible danger that the open will not succeed, 2602 * due to memory being full. 2603 */ 2604 mv643xx_eth_stop(dev); 2605 if (mv643xx_eth_open(dev)) { 2606 netdev_err(dev, 2607 "fatal error on re-opening device after MTU change\n"); 2608 } 2609 2610 return 0; 2611 } 2612 2613 static void tx_timeout_task(struct work_struct *ugly) 2614 { 2615 struct mv643xx_eth_private *mp; 2616 2617 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task); 2618 if (netif_running(mp->dev)) { 2619 netif_tx_stop_all_queues(mp->dev); 2620 port_reset(mp); 2621 port_start(mp); 2622 netif_tx_wake_all_queues(mp->dev); 2623 } 2624 } 2625 2626 static void mv643xx_eth_tx_timeout(struct net_device *dev) 2627 { 2628 struct mv643xx_eth_private *mp = netdev_priv(dev); 2629 2630 netdev_info(dev, "tx timeout\n"); 2631 2632 schedule_work(&mp->tx_timeout_task); 2633 } 2634 2635 #ifdef CONFIG_NET_POLL_CONTROLLER 2636 static void mv643xx_eth_netpoll(struct net_device *dev) 2637 { 2638 struct mv643xx_eth_private *mp = netdev_priv(dev); 2639 2640 wrlp(mp, INT_MASK, 0x00000000); 2641 rdlp(mp, INT_MASK); 2642 2643 mv643xx_eth_irq(dev->irq, dev); 2644 2645 wrlp(mp, INT_MASK, mp->int_mask); 2646 } 2647 #endif 2648 2649 2650 /* platform glue ************************************************************/ 2651 static void 2652 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, 2653 const struct mbus_dram_target_info *dram) 2654 { 2655 void __iomem *base = msp->base; 2656 u32 win_enable; 2657 u32 win_protect; 2658 int i; 2659 2660 for (i = 0; i < 6; i++) { 2661 writel(0, base + WINDOW_BASE(i)); 2662 writel(0, base + WINDOW_SIZE(i)); 2663 if (i < 4) 2664 writel(0, base + WINDOW_REMAP_HIGH(i)); 2665 } 2666 2667 win_enable = 0x3f; 2668 win_protect = 0; 2669 2670 for (i = 0; i < dram->num_cs; i++) { 2671 const struct mbus_dram_window *cs = dram->cs + i; 2672 2673 writel((cs->base & 0xffff0000) | 2674 (cs->mbus_attr << 8) | 2675 dram->mbus_dram_target_id, base + WINDOW_BASE(i)); 2676 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); 2677 2678 win_enable &= ~(1 << i); 2679 win_protect |= 3 << (2 * i); 2680 } 2681 2682 writel(win_enable, base + WINDOW_BAR_ENABLE); 2683 msp->win_protect = win_protect; 2684 } 2685 2686 static void infer_hw_params(struct mv643xx_eth_shared_private *msp) 2687 { 2688 /* 2689 * Check whether we have a 14-bit coal limit field in bits 2690 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the 2691 * SDMA config register. 2692 */ 2693 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); 2694 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) 2695 msp->extended_rx_coal_limit = 1; 2696 else 2697 msp->extended_rx_coal_limit = 0; 2698 2699 /* 2700 * Check whether the MAC supports TX rate control, and if 2701 * yes, whether its associated registers are in the old or 2702 * the new place. 2703 */ 2704 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); 2705 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { 2706 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; 2707 } else { 2708 writel(7, msp->base + 0x0400 + TX_BW_RATE); 2709 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) 2710 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; 2711 else 2712 msp->tx_bw_control = TX_BW_CONTROL_ABSENT; 2713 } 2714 } 2715 2716 #if defined(CONFIG_OF) 2717 static const struct of_device_id mv643xx_eth_shared_ids[] = { 2718 { .compatible = "marvell,orion-eth", }, 2719 { .compatible = "marvell,kirkwood-eth", }, 2720 { } 2721 }; 2722 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); 2723 #endif 2724 2725 #if defined(CONFIG_OF) && !defined(CONFIG_MV64X60) 2726 #define mv643xx_eth_property(_np, _name, _v) \ 2727 do { \ 2728 u32 tmp; \ 2729 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ 2730 _v = tmp; \ 2731 } while (0) 2732 2733 static struct platform_device *port_platdev[3]; 2734 2735 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, 2736 struct device_node *pnp) 2737 { 2738 struct platform_device *ppdev; 2739 struct mv643xx_eth_platform_data ppd; 2740 struct resource res; 2741 const char *mac_addr; 2742 int ret; 2743 int dev_num = 0; 2744 2745 memset(&ppd, 0, sizeof(ppd)); 2746 ppd.shared = pdev; 2747 2748 memset(&res, 0, sizeof(res)); 2749 if (!of_irq_to_resource(pnp, 0, &res)) { 2750 dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name); 2751 return -EINVAL; 2752 } 2753 2754 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { 2755 dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name); 2756 return -EINVAL; 2757 } 2758 2759 if (ppd.port_number >= 3) { 2760 dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name); 2761 return -EINVAL; 2762 } 2763 2764 while (dev_num < 3 && port_platdev[dev_num]) 2765 dev_num++; 2766 2767 if (dev_num == 3) { 2768 dev_err(&pdev->dev, "too many ports registered\n"); 2769 return -EINVAL; 2770 } 2771 2772 mac_addr = of_get_mac_address(pnp); 2773 if (mac_addr) 2774 memcpy(ppd.mac_addr, mac_addr, ETH_ALEN); 2775 2776 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); 2777 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); 2778 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); 2779 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); 2780 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); 2781 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); 2782 2783 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); 2784 if (!ppd.phy_node) { 2785 ppd.phy_addr = MV643XX_ETH_PHY_NONE; 2786 of_property_read_u32(pnp, "speed", &ppd.speed); 2787 of_property_read_u32(pnp, "duplex", &ppd.duplex); 2788 } 2789 2790 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); 2791 if (!ppdev) 2792 return -ENOMEM; 2793 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 2794 ppdev->dev.of_node = pnp; 2795 2796 ret = platform_device_add_resources(ppdev, &res, 1); 2797 if (ret) 2798 goto port_err; 2799 2800 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); 2801 if (ret) 2802 goto port_err; 2803 2804 ret = platform_device_add(ppdev); 2805 if (ret) 2806 goto port_err; 2807 2808 port_platdev[dev_num] = ppdev; 2809 2810 return 0; 2811 2812 port_err: 2813 platform_device_put(ppdev); 2814 return ret; 2815 } 2816 2817 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2818 { 2819 struct mv643xx_eth_shared_platform_data *pd; 2820 struct device_node *pnp, *np = pdev->dev.of_node; 2821 int ret; 2822 2823 /* bail out if not registered from DT */ 2824 if (!np) 2825 return 0; 2826 2827 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); 2828 if (!pd) 2829 return -ENOMEM; 2830 pdev->dev.platform_data = pd; 2831 2832 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); 2833 2834 for_each_available_child_of_node(np, pnp) { 2835 ret = mv643xx_eth_shared_of_add_port(pdev, pnp); 2836 if (ret) { 2837 of_node_put(pnp); 2838 return ret; 2839 } 2840 } 2841 return 0; 2842 } 2843 2844 static void mv643xx_eth_shared_of_remove(void) 2845 { 2846 int n; 2847 2848 for (n = 0; n < 3; n++) { 2849 platform_device_del(port_platdev[n]); 2850 port_platdev[n] = NULL; 2851 } 2852 } 2853 #else 2854 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2855 { 2856 return 0; 2857 } 2858 2859 static inline void mv643xx_eth_shared_of_remove(void) 2860 { 2861 } 2862 #endif 2863 2864 static int mv643xx_eth_shared_probe(struct platform_device *pdev) 2865 { 2866 static int mv643xx_eth_version_printed; 2867 struct mv643xx_eth_shared_platform_data *pd; 2868 struct mv643xx_eth_shared_private *msp; 2869 const struct mbus_dram_target_info *dram; 2870 struct resource *res; 2871 int ret; 2872 2873 if (!mv643xx_eth_version_printed++) 2874 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", 2875 mv643xx_eth_driver_version); 2876 2877 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2878 if (res == NULL) 2879 return -EINVAL; 2880 2881 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); 2882 if (msp == NULL) 2883 return -ENOMEM; 2884 platform_set_drvdata(pdev, msp); 2885 2886 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 2887 if (msp->base == NULL) 2888 return -ENOMEM; 2889 2890 msp->clk = devm_clk_get(&pdev->dev, NULL); 2891 if (!IS_ERR(msp->clk)) 2892 clk_prepare_enable(msp->clk); 2893 2894 /* 2895 * (Re-)program MBUS remapping windows if we are asked to. 2896 */ 2897 dram = mv_mbus_dram_info(); 2898 if (dram) 2899 mv643xx_eth_conf_mbus_windows(msp, dram); 2900 2901 ret = mv643xx_eth_shared_of_probe(pdev); 2902 if (ret) 2903 return ret; 2904 pd = dev_get_platdata(&pdev->dev); 2905 2906 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? 2907 pd->tx_csum_limit : 9 * 1024; 2908 infer_hw_params(msp); 2909 2910 return 0; 2911 } 2912 2913 static int mv643xx_eth_shared_remove(struct platform_device *pdev) 2914 { 2915 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); 2916 2917 mv643xx_eth_shared_of_remove(); 2918 if (!IS_ERR(msp->clk)) 2919 clk_disable_unprepare(msp->clk); 2920 return 0; 2921 } 2922 2923 static struct platform_driver mv643xx_eth_shared_driver = { 2924 .probe = mv643xx_eth_shared_probe, 2925 .remove = mv643xx_eth_shared_remove, 2926 .driver = { 2927 .name = MV643XX_ETH_SHARED_NAME, 2928 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), 2929 }, 2930 }; 2931 2932 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) 2933 { 2934 int addr_shift = 5 * mp->port_num; 2935 u32 data; 2936 2937 data = rdl(mp, PHY_ADDR); 2938 data &= ~(0x1f << addr_shift); 2939 data |= (phy_addr & 0x1f) << addr_shift; 2940 wrl(mp, PHY_ADDR, data); 2941 } 2942 2943 static int phy_addr_get(struct mv643xx_eth_private *mp) 2944 { 2945 unsigned int data; 2946 2947 data = rdl(mp, PHY_ADDR); 2948 2949 return (data >> (5 * mp->port_num)) & 0x1f; 2950 } 2951 2952 static void set_params(struct mv643xx_eth_private *mp, 2953 struct mv643xx_eth_platform_data *pd) 2954 { 2955 struct net_device *dev = mp->dev; 2956 unsigned int tx_ring_size; 2957 2958 if (is_valid_ether_addr(pd->mac_addr)) 2959 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN); 2960 else 2961 uc_addr_get(mp, dev->dev_addr); 2962 2963 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE; 2964 if (pd->rx_queue_size) 2965 mp->rx_ring_size = pd->rx_queue_size; 2966 mp->rx_desc_sram_addr = pd->rx_sram_addr; 2967 mp->rx_desc_sram_size = pd->rx_sram_size; 2968 2969 mp->rxq_count = pd->rx_queue_count ? : 1; 2970 2971 tx_ring_size = DEFAULT_TX_QUEUE_SIZE; 2972 if (pd->tx_queue_size) 2973 tx_ring_size = pd->tx_queue_size; 2974 2975 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size, 2976 MV643XX_MAX_SKB_DESCS * 2, 4096); 2977 if (mp->tx_ring_size != tx_ring_size) 2978 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 2979 mp->tx_ring_size, tx_ring_size); 2980 2981 mp->tx_desc_sram_addr = pd->tx_sram_addr; 2982 mp->tx_desc_sram_size = pd->tx_sram_size; 2983 2984 mp->txq_count = pd->tx_queue_count ? : 1; 2985 } 2986 2987 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp, 2988 int phy_addr) 2989 { 2990 struct phy_device *phydev; 2991 int start; 2992 int num; 2993 int i; 2994 char phy_id[MII_BUS_ID_SIZE + 3]; 2995 2996 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { 2997 start = phy_addr_get(mp) & 0x1f; 2998 num = 32; 2999 } else { 3000 start = phy_addr & 0x1f; 3001 num = 1; 3002 } 3003 3004 /* Attempt to connect to the PHY using orion-mdio */ 3005 phydev = ERR_PTR(-ENODEV); 3006 for (i = 0; i < num; i++) { 3007 int addr = (start + i) & 0x1f; 3008 3009 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, 3010 "orion-mdio-mii", addr); 3011 3012 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, 3013 PHY_INTERFACE_MODE_GMII); 3014 if (!IS_ERR(phydev)) { 3015 phy_addr_set(mp, addr); 3016 break; 3017 } 3018 } 3019 3020 return phydev; 3021 } 3022 3023 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) 3024 { 3025 struct net_device *dev = mp->dev; 3026 struct phy_device *phy = dev->phydev; 3027 3028 if (speed == 0) { 3029 phy->autoneg = AUTONEG_ENABLE; 3030 phy->speed = 0; 3031 phy->duplex = 0; 3032 phy->advertising = phy->supported | ADVERTISED_Autoneg; 3033 } else { 3034 phy->autoneg = AUTONEG_DISABLE; 3035 phy->advertising = 0; 3036 phy->speed = speed; 3037 phy->duplex = duplex; 3038 } 3039 phy_start_aneg(phy); 3040 } 3041 3042 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) 3043 { 3044 struct net_device *dev = mp->dev; 3045 u32 pscr; 3046 3047 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 3048 if (pscr & SERIAL_PORT_ENABLE) { 3049 pscr &= ~SERIAL_PORT_ENABLE; 3050 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3051 } 3052 3053 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; 3054 if (!dev->phydev) { 3055 pscr |= DISABLE_AUTO_NEG_SPEED_GMII; 3056 if (speed == SPEED_1000) 3057 pscr |= SET_GMII_SPEED_TO_1000; 3058 else if (speed == SPEED_100) 3059 pscr |= SET_MII_SPEED_TO_100; 3060 3061 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; 3062 3063 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; 3064 if (duplex == DUPLEX_FULL) 3065 pscr |= SET_FULL_DUPLEX_MODE; 3066 } 3067 3068 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3069 } 3070 3071 static const struct net_device_ops mv643xx_eth_netdev_ops = { 3072 .ndo_open = mv643xx_eth_open, 3073 .ndo_stop = mv643xx_eth_stop, 3074 .ndo_start_xmit = mv643xx_eth_xmit, 3075 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, 3076 .ndo_set_mac_address = mv643xx_eth_set_mac_address, 3077 .ndo_validate_addr = eth_validate_addr, 3078 .ndo_do_ioctl = mv643xx_eth_ioctl, 3079 .ndo_change_mtu = mv643xx_eth_change_mtu, 3080 .ndo_set_features = mv643xx_eth_set_features, 3081 .ndo_tx_timeout = mv643xx_eth_tx_timeout, 3082 .ndo_get_stats = mv643xx_eth_get_stats, 3083 #ifdef CONFIG_NET_POLL_CONTROLLER 3084 .ndo_poll_controller = mv643xx_eth_netpoll, 3085 #endif 3086 }; 3087 3088 static int mv643xx_eth_probe(struct platform_device *pdev) 3089 { 3090 struct mv643xx_eth_platform_data *pd; 3091 struct mv643xx_eth_private *mp; 3092 struct net_device *dev; 3093 struct phy_device *phydev = NULL; 3094 struct resource *res; 3095 int err; 3096 3097 pd = dev_get_platdata(&pdev->dev); 3098 if (pd == NULL) { 3099 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); 3100 return -ENODEV; 3101 } 3102 3103 if (pd->shared == NULL) { 3104 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); 3105 return -ENODEV; 3106 } 3107 3108 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); 3109 if (!dev) 3110 return -ENOMEM; 3111 3112 mp = netdev_priv(dev); 3113 platform_set_drvdata(pdev, mp); 3114 3115 mp->shared = platform_get_drvdata(pd->shared); 3116 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); 3117 mp->port_num = pd->port_number; 3118 3119 mp->dev = dev; 3120 3121 /* Kirkwood resets some registers on gated clocks. Especially 3122 * CLK125_BYPASS_EN must be cleared but is not available on 3123 * all other SoCs/System Controllers using this driver. 3124 */ 3125 if (of_device_is_compatible(pdev->dev.of_node, 3126 "marvell,kirkwood-eth-port")) 3127 wrlp(mp, PORT_SERIAL_CONTROL1, 3128 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); 3129 3130 /* 3131 * Start with a default rate, and if there is a clock, allow 3132 * it to override the default. 3133 */ 3134 mp->t_clk = 133000000; 3135 mp->clk = devm_clk_get(&pdev->dev, NULL); 3136 if (!IS_ERR(mp->clk)) { 3137 clk_prepare_enable(mp->clk); 3138 mp->t_clk = clk_get_rate(mp->clk); 3139 } else if (!IS_ERR(mp->shared->clk)) { 3140 mp->t_clk = clk_get_rate(mp->shared->clk); 3141 } 3142 3143 set_params(mp, pd); 3144 netif_set_real_num_tx_queues(dev, mp->txq_count); 3145 netif_set_real_num_rx_queues(dev, mp->rxq_count); 3146 3147 err = 0; 3148 if (pd->phy_node) { 3149 phydev = of_phy_connect(mp->dev, pd->phy_node, 3150 mv643xx_eth_adjust_link, 0, 3151 PHY_INTERFACE_MODE_GMII); 3152 if (!phydev) 3153 err = -ENODEV; 3154 else 3155 phy_addr_set(mp, phydev->mdio.addr); 3156 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { 3157 phydev = phy_scan(mp, pd->phy_addr); 3158 3159 if (IS_ERR(phydev)) 3160 err = PTR_ERR(phydev); 3161 else 3162 phy_init(mp, pd->speed, pd->duplex); 3163 } 3164 if (err == -ENODEV) { 3165 err = -EPROBE_DEFER; 3166 goto out; 3167 } 3168 if (err) 3169 goto out; 3170 3171 dev->ethtool_ops = &mv643xx_eth_ethtool_ops; 3172 3173 init_pscr(mp, pd->speed, pd->duplex); 3174 3175 3176 mib_counters_clear(mp); 3177 3178 setup_timer(&mp->mib_counters_timer, mib_counters_timer_wrapper, 3179 (unsigned long)mp); 3180 mp->mib_counters_timer.expires = jiffies + 30 * HZ; 3181 3182 spin_lock_init(&mp->mib_counters_lock); 3183 3184 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); 3185 3186 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT); 3187 3188 setup_timer(&mp->rx_oom, oom_timer_wrapper, (unsigned long)mp); 3189 3190 3191 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 3192 BUG_ON(!res); 3193 dev->irq = res->start; 3194 3195 dev->netdev_ops = &mv643xx_eth_netdev_ops; 3196 3197 dev->watchdog_timeo = 2 * HZ; 3198 dev->base_addr = 0; 3199 3200 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; 3201 dev->vlan_features = dev->features; 3202 3203 dev->features |= NETIF_F_RXCSUM; 3204 dev->hw_features = dev->features; 3205 3206 dev->priv_flags |= IFF_UNICAST_FLT; 3207 dev->gso_max_segs = MV643XX_MAX_TSO_SEGS; 3208 3209 SET_NETDEV_DEV(dev, &pdev->dev); 3210 3211 if (mp->shared->win_protect) 3212 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); 3213 3214 netif_carrier_off(dev); 3215 3216 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); 3217 3218 set_rx_coal(mp, 250); 3219 set_tx_coal(mp, 0); 3220 3221 err = register_netdev(dev); 3222 if (err) 3223 goto out; 3224 3225 netdev_notice(dev, "port %d with MAC address %pM\n", 3226 mp->port_num, dev->dev_addr); 3227 3228 if (mp->tx_desc_sram_size > 0) 3229 netdev_notice(dev, "configured with sram\n"); 3230 3231 return 0; 3232 3233 out: 3234 if (!IS_ERR(mp->clk)) 3235 clk_disable_unprepare(mp->clk); 3236 free_netdev(dev); 3237 3238 return err; 3239 } 3240 3241 static int mv643xx_eth_remove(struct platform_device *pdev) 3242 { 3243 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3244 struct net_device *dev = mp->dev; 3245 3246 unregister_netdev(mp->dev); 3247 if (dev->phydev) 3248 phy_disconnect(dev->phydev); 3249 cancel_work_sync(&mp->tx_timeout_task); 3250 3251 if (!IS_ERR(mp->clk)) 3252 clk_disable_unprepare(mp->clk); 3253 3254 free_netdev(mp->dev); 3255 3256 return 0; 3257 } 3258 3259 static void mv643xx_eth_shutdown(struct platform_device *pdev) 3260 { 3261 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3262 3263 /* Mask all interrupts on ethernet port */ 3264 wrlp(mp, INT_MASK, 0); 3265 rdlp(mp, INT_MASK); 3266 3267 if (netif_running(mp->dev)) 3268 port_reset(mp); 3269 } 3270 3271 static struct platform_driver mv643xx_eth_driver = { 3272 .probe = mv643xx_eth_probe, 3273 .remove = mv643xx_eth_remove, 3274 .shutdown = mv643xx_eth_shutdown, 3275 .driver = { 3276 .name = MV643XX_ETH_NAME, 3277 }, 3278 }; 3279 3280 static struct platform_driver * const drivers[] = { 3281 &mv643xx_eth_shared_driver, 3282 &mv643xx_eth_driver, 3283 }; 3284 3285 static int __init mv643xx_eth_init_module(void) 3286 { 3287 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 3288 } 3289 module_init(mv643xx_eth_init_module); 3290 3291 static void __exit mv643xx_eth_cleanup_module(void) 3292 { 3293 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 3294 } 3295 module_exit(mv643xx_eth_cleanup_module); 3296 3297 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " 3298 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); 3299 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); 3300 MODULE_LICENSE("GPL"); 3301 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); 3302 MODULE_ALIAS("platform:" MV643XX_ETH_NAME); 3303