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 temp += mp->t_clk / 2; 1383 do_div(temp, mp->t_clk); 1384 1385 return (unsigned int)temp; 1386 } 1387 1388 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1389 { 1390 u64 temp; 1391 u32 val; 1392 1393 temp = (u64)usec * mp->t_clk; 1394 temp += 31999999; 1395 do_div(temp, 64000000); 1396 1397 val = rdlp(mp, SDMA_CONFIG); 1398 if (mp->shared->extended_rx_coal_limit) { 1399 if (temp > 0xffff) 1400 temp = 0xffff; 1401 val &= ~0x023fff80; 1402 val |= (temp & 0x8000) << 10; 1403 val |= (temp & 0x7fff) << 7; 1404 } else { 1405 if (temp > 0x3fff) 1406 temp = 0x3fff; 1407 val &= ~0x003fff00; 1408 val |= (temp & 0x3fff) << 8; 1409 } 1410 wrlp(mp, SDMA_CONFIG, val); 1411 } 1412 1413 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) 1414 { 1415 u64 temp; 1416 1417 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; 1418 temp *= 64000000; 1419 temp += mp->t_clk / 2; 1420 do_div(temp, mp->t_clk); 1421 1422 return (unsigned int)temp; 1423 } 1424 1425 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1426 { 1427 u64 temp; 1428 1429 temp = (u64)usec * mp->t_clk; 1430 temp += 31999999; 1431 do_div(temp, 64000000); 1432 1433 if (temp > 0x3fff) 1434 temp = 0x3fff; 1435 1436 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); 1437 } 1438 1439 1440 /* ethtool ******************************************************************/ 1441 struct mv643xx_eth_stats { 1442 char stat_string[ETH_GSTRING_LEN]; 1443 int sizeof_stat; 1444 int netdev_off; 1445 int mp_off; 1446 }; 1447 1448 #define SSTAT(m) \ 1449 { #m, FIELD_SIZEOF(struct net_device_stats, m), \ 1450 offsetof(struct net_device, stats.m), -1 } 1451 1452 #define MIBSTAT(m) \ 1453 { #m, FIELD_SIZEOF(struct mib_counters, m), \ 1454 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } 1455 1456 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = { 1457 SSTAT(rx_packets), 1458 SSTAT(tx_packets), 1459 SSTAT(rx_bytes), 1460 SSTAT(tx_bytes), 1461 SSTAT(rx_errors), 1462 SSTAT(tx_errors), 1463 SSTAT(rx_dropped), 1464 SSTAT(tx_dropped), 1465 MIBSTAT(good_octets_received), 1466 MIBSTAT(bad_octets_received), 1467 MIBSTAT(internal_mac_transmit_err), 1468 MIBSTAT(good_frames_received), 1469 MIBSTAT(bad_frames_received), 1470 MIBSTAT(broadcast_frames_received), 1471 MIBSTAT(multicast_frames_received), 1472 MIBSTAT(frames_64_octets), 1473 MIBSTAT(frames_65_to_127_octets), 1474 MIBSTAT(frames_128_to_255_octets), 1475 MIBSTAT(frames_256_to_511_octets), 1476 MIBSTAT(frames_512_to_1023_octets), 1477 MIBSTAT(frames_1024_to_max_octets), 1478 MIBSTAT(good_octets_sent), 1479 MIBSTAT(good_frames_sent), 1480 MIBSTAT(excessive_collision), 1481 MIBSTAT(multicast_frames_sent), 1482 MIBSTAT(broadcast_frames_sent), 1483 MIBSTAT(unrec_mac_control_received), 1484 MIBSTAT(fc_sent), 1485 MIBSTAT(good_fc_received), 1486 MIBSTAT(bad_fc_received), 1487 MIBSTAT(undersize_received), 1488 MIBSTAT(fragments_received), 1489 MIBSTAT(oversize_received), 1490 MIBSTAT(jabber_received), 1491 MIBSTAT(mac_receive_error), 1492 MIBSTAT(bad_crc_event), 1493 MIBSTAT(collision), 1494 MIBSTAT(late_collision), 1495 MIBSTAT(rx_discard), 1496 MIBSTAT(rx_overrun), 1497 }; 1498 1499 static int 1500 mv643xx_eth_get_link_ksettings_phy(struct mv643xx_eth_private *mp, 1501 struct ethtool_link_ksettings *cmd) 1502 { 1503 struct net_device *dev = mp->dev; 1504 int err; 1505 u32 supported, advertising; 1506 1507 err = phy_read_status(dev->phydev); 1508 if (err == 0) 1509 err = phy_ethtool_ksettings_get(dev->phydev, cmd); 1510 1511 /* 1512 * The MAC does not support 1000baseT_Half. 1513 */ 1514 ethtool_convert_link_mode_to_legacy_u32(&supported, 1515 cmd->link_modes.supported); 1516 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1517 cmd->link_modes.advertising); 1518 supported &= ~SUPPORTED_1000baseT_Half; 1519 advertising &= ~ADVERTISED_1000baseT_Half; 1520 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1521 supported); 1522 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1523 advertising); 1524 1525 return err; 1526 } 1527 1528 static int 1529 mv643xx_eth_get_link_ksettings_phyless(struct mv643xx_eth_private *mp, 1530 struct ethtool_link_ksettings *cmd) 1531 { 1532 u32 port_status; 1533 u32 supported, advertising; 1534 1535 port_status = rdlp(mp, PORT_STATUS); 1536 1537 supported = SUPPORTED_MII; 1538 advertising = ADVERTISED_MII; 1539 switch (port_status & PORT_SPEED_MASK) { 1540 case PORT_SPEED_10: 1541 cmd->base.speed = SPEED_10; 1542 break; 1543 case PORT_SPEED_100: 1544 cmd->base.speed = SPEED_100; 1545 break; 1546 case PORT_SPEED_1000: 1547 cmd->base.speed = SPEED_1000; 1548 break; 1549 default: 1550 cmd->base.speed = -1; 1551 break; 1552 } 1553 cmd->base.duplex = (port_status & FULL_DUPLEX) ? 1554 DUPLEX_FULL : DUPLEX_HALF; 1555 cmd->base.port = PORT_MII; 1556 cmd->base.phy_address = 0; 1557 cmd->base.autoneg = AUTONEG_DISABLE; 1558 1559 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1560 supported); 1561 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1562 advertising); 1563 1564 return 0; 1565 } 1566 1567 static void 1568 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1569 { 1570 wol->supported = 0; 1571 wol->wolopts = 0; 1572 if (dev->phydev) 1573 phy_ethtool_get_wol(dev->phydev, wol); 1574 } 1575 1576 static int 1577 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1578 { 1579 int err; 1580 1581 if (!dev->phydev) 1582 return -EOPNOTSUPP; 1583 1584 err = phy_ethtool_set_wol(dev->phydev, wol); 1585 /* Given that mv643xx_eth works without the marvell-specific PHY driver, 1586 * this debugging hint is useful to have. 1587 */ 1588 if (err == -EOPNOTSUPP) 1589 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n"); 1590 return err; 1591 } 1592 1593 static int 1594 mv643xx_eth_get_link_ksettings(struct net_device *dev, 1595 struct ethtool_link_ksettings *cmd) 1596 { 1597 struct mv643xx_eth_private *mp = netdev_priv(dev); 1598 1599 if (dev->phydev) 1600 return mv643xx_eth_get_link_ksettings_phy(mp, cmd); 1601 else 1602 return mv643xx_eth_get_link_ksettings_phyless(mp, cmd); 1603 } 1604 1605 static int 1606 mv643xx_eth_set_link_ksettings(struct net_device *dev, 1607 const struct ethtool_link_ksettings *cmd) 1608 { 1609 struct ethtool_link_ksettings c = *cmd; 1610 u32 advertising; 1611 int ret; 1612 1613 if (!dev->phydev) 1614 return -EINVAL; 1615 1616 /* 1617 * The MAC does not support 1000baseT_Half. 1618 */ 1619 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1620 c.link_modes.advertising); 1621 advertising &= ~ADVERTISED_1000baseT_Half; 1622 ethtool_convert_legacy_u32_to_link_mode(c.link_modes.advertising, 1623 advertising); 1624 1625 ret = phy_ethtool_ksettings_set(dev->phydev, &c); 1626 if (!ret) 1627 mv643xx_eth_adjust_link(dev); 1628 return ret; 1629 } 1630 1631 static void mv643xx_eth_get_drvinfo(struct net_device *dev, 1632 struct ethtool_drvinfo *drvinfo) 1633 { 1634 strlcpy(drvinfo->driver, mv643xx_eth_driver_name, 1635 sizeof(drvinfo->driver)); 1636 strlcpy(drvinfo->version, mv643xx_eth_driver_version, 1637 sizeof(drvinfo->version)); 1638 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 1639 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 1640 } 1641 1642 static int 1643 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1644 { 1645 struct mv643xx_eth_private *mp = netdev_priv(dev); 1646 1647 ec->rx_coalesce_usecs = get_rx_coal(mp); 1648 ec->tx_coalesce_usecs = get_tx_coal(mp); 1649 1650 return 0; 1651 } 1652 1653 static int 1654 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1655 { 1656 struct mv643xx_eth_private *mp = netdev_priv(dev); 1657 1658 set_rx_coal(mp, ec->rx_coalesce_usecs); 1659 set_tx_coal(mp, ec->tx_coalesce_usecs); 1660 1661 return 0; 1662 } 1663 1664 static void 1665 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1666 { 1667 struct mv643xx_eth_private *mp = netdev_priv(dev); 1668 1669 er->rx_max_pending = 4096; 1670 er->tx_max_pending = 4096; 1671 1672 er->rx_pending = mp->rx_ring_size; 1673 er->tx_pending = mp->tx_ring_size; 1674 } 1675 1676 static int 1677 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1678 { 1679 struct mv643xx_eth_private *mp = netdev_priv(dev); 1680 1681 if (er->rx_mini_pending || er->rx_jumbo_pending) 1682 return -EINVAL; 1683 1684 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096; 1685 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending, 1686 MV643XX_MAX_SKB_DESCS * 2, 4096); 1687 if (mp->tx_ring_size != er->tx_pending) 1688 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 1689 mp->tx_ring_size, er->tx_pending); 1690 1691 if (netif_running(dev)) { 1692 mv643xx_eth_stop(dev); 1693 if (mv643xx_eth_open(dev)) { 1694 netdev_err(dev, 1695 "fatal error on re-opening device after ring param change\n"); 1696 return -ENOMEM; 1697 } 1698 } 1699 1700 return 0; 1701 } 1702 1703 1704 static int 1705 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) 1706 { 1707 struct mv643xx_eth_private *mp = netdev_priv(dev); 1708 bool rx_csum = features & NETIF_F_RXCSUM; 1709 1710 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); 1711 1712 return 0; 1713 } 1714 1715 static void mv643xx_eth_get_strings(struct net_device *dev, 1716 uint32_t stringset, uint8_t *data) 1717 { 1718 int i; 1719 1720 if (stringset == ETH_SS_STATS) { 1721 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1722 memcpy(data + i * ETH_GSTRING_LEN, 1723 mv643xx_eth_stats[i].stat_string, 1724 ETH_GSTRING_LEN); 1725 } 1726 } 1727 } 1728 1729 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, 1730 struct ethtool_stats *stats, 1731 uint64_t *data) 1732 { 1733 struct mv643xx_eth_private *mp = netdev_priv(dev); 1734 int i; 1735 1736 mv643xx_eth_get_stats(dev); 1737 mib_counters_update(mp); 1738 1739 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1740 const struct mv643xx_eth_stats *stat; 1741 void *p; 1742 1743 stat = mv643xx_eth_stats + i; 1744 1745 if (stat->netdev_off >= 0) 1746 p = ((void *)mp->dev) + stat->netdev_off; 1747 else 1748 p = ((void *)mp) + stat->mp_off; 1749 1750 data[i] = (stat->sizeof_stat == 8) ? 1751 *(uint64_t *)p : *(uint32_t *)p; 1752 } 1753 } 1754 1755 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset) 1756 { 1757 if (sset == ETH_SS_STATS) 1758 return ARRAY_SIZE(mv643xx_eth_stats); 1759 1760 return -EOPNOTSUPP; 1761 } 1762 1763 static const struct ethtool_ops mv643xx_eth_ethtool_ops = { 1764 .get_drvinfo = mv643xx_eth_get_drvinfo, 1765 .nway_reset = phy_ethtool_nway_reset, 1766 .get_link = ethtool_op_get_link, 1767 .get_coalesce = mv643xx_eth_get_coalesce, 1768 .set_coalesce = mv643xx_eth_set_coalesce, 1769 .get_ringparam = mv643xx_eth_get_ringparam, 1770 .set_ringparam = mv643xx_eth_set_ringparam, 1771 .get_strings = mv643xx_eth_get_strings, 1772 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, 1773 .get_sset_count = mv643xx_eth_get_sset_count, 1774 .get_ts_info = ethtool_op_get_ts_info, 1775 .get_wol = mv643xx_eth_get_wol, 1776 .set_wol = mv643xx_eth_set_wol, 1777 .get_link_ksettings = mv643xx_eth_get_link_ksettings, 1778 .set_link_ksettings = mv643xx_eth_set_link_ksettings, 1779 }; 1780 1781 1782 /* address handling *********************************************************/ 1783 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr) 1784 { 1785 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH); 1786 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW); 1787 1788 addr[0] = (mac_h >> 24) & 0xff; 1789 addr[1] = (mac_h >> 16) & 0xff; 1790 addr[2] = (mac_h >> 8) & 0xff; 1791 addr[3] = mac_h & 0xff; 1792 addr[4] = (mac_l >> 8) & 0xff; 1793 addr[5] = mac_l & 0xff; 1794 } 1795 1796 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr) 1797 { 1798 wrlp(mp, MAC_ADDR_HIGH, 1799 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); 1800 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]); 1801 } 1802 1803 static u32 uc_addr_filter_mask(struct net_device *dev) 1804 { 1805 struct netdev_hw_addr *ha; 1806 u32 nibbles; 1807 1808 if (dev->flags & IFF_PROMISC) 1809 return 0; 1810 1811 nibbles = 1 << (dev->dev_addr[5] & 0x0f); 1812 netdev_for_each_uc_addr(ha, dev) { 1813 if (memcmp(dev->dev_addr, ha->addr, 5)) 1814 return 0; 1815 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) 1816 return 0; 1817 1818 nibbles |= 1 << (ha->addr[5] & 0x0f); 1819 } 1820 1821 return nibbles; 1822 } 1823 1824 static void mv643xx_eth_program_unicast_filter(struct net_device *dev) 1825 { 1826 struct mv643xx_eth_private *mp = netdev_priv(dev); 1827 u32 port_config; 1828 u32 nibbles; 1829 int i; 1830 1831 uc_addr_set(mp, dev->dev_addr); 1832 1833 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; 1834 1835 nibbles = uc_addr_filter_mask(dev); 1836 if (!nibbles) { 1837 port_config |= UNICAST_PROMISCUOUS_MODE; 1838 nibbles = 0xffff; 1839 } 1840 1841 for (i = 0; i < 16; i += 4) { 1842 int off = UNICAST_TABLE(mp->port_num) + i; 1843 u32 v; 1844 1845 v = 0; 1846 if (nibbles & 1) 1847 v |= 0x00000001; 1848 if (nibbles & 2) 1849 v |= 0x00000100; 1850 if (nibbles & 4) 1851 v |= 0x00010000; 1852 if (nibbles & 8) 1853 v |= 0x01000000; 1854 nibbles >>= 4; 1855 1856 wrl(mp, off, v); 1857 } 1858 1859 wrlp(mp, PORT_CONFIG, port_config); 1860 } 1861 1862 static int addr_crc(unsigned char *addr) 1863 { 1864 int crc = 0; 1865 int i; 1866 1867 for (i = 0; i < 6; i++) { 1868 int j; 1869 1870 crc = (crc ^ addr[i]) << 8; 1871 for (j = 7; j >= 0; j--) { 1872 if (crc & (0x100 << j)) 1873 crc ^= 0x107 << j; 1874 } 1875 } 1876 1877 return crc; 1878 } 1879 1880 static void mv643xx_eth_program_multicast_filter(struct net_device *dev) 1881 { 1882 struct mv643xx_eth_private *mp = netdev_priv(dev); 1883 u32 *mc_spec; 1884 u32 *mc_other; 1885 struct netdev_hw_addr *ha; 1886 int i; 1887 1888 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) 1889 goto promiscuous; 1890 1891 /* Allocate both mc_spec and mc_other tables */ 1892 mc_spec = kcalloc(128, sizeof(u32), GFP_ATOMIC); 1893 if (!mc_spec) 1894 goto promiscuous; 1895 mc_other = &mc_spec[64]; 1896 1897 netdev_for_each_mc_addr(ha, dev) { 1898 u8 *a = ha->addr; 1899 u32 *table; 1900 u8 entry; 1901 1902 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { 1903 table = mc_spec; 1904 entry = a[5]; 1905 } else { 1906 table = mc_other; 1907 entry = addr_crc(a); 1908 } 1909 1910 table[entry >> 2] |= 1 << (8 * (entry & 3)); 1911 } 1912 1913 for (i = 0; i < 64; i++) { 1914 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1915 mc_spec[i]); 1916 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1917 mc_other[i]); 1918 } 1919 1920 kfree(mc_spec); 1921 return; 1922 1923 promiscuous: 1924 for (i = 0; i < 64; i++) { 1925 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1926 0x01010101u); 1927 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1928 0x01010101u); 1929 } 1930 } 1931 1932 static void mv643xx_eth_set_rx_mode(struct net_device *dev) 1933 { 1934 mv643xx_eth_program_unicast_filter(dev); 1935 mv643xx_eth_program_multicast_filter(dev); 1936 } 1937 1938 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) 1939 { 1940 struct sockaddr *sa = addr; 1941 1942 if (!is_valid_ether_addr(sa->sa_data)) 1943 return -EADDRNOTAVAIL; 1944 1945 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); 1946 1947 netif_addr_lock_bh(dev); 1948 mv643xx_eth_program_unicast_filter(dev); 1949 netif_addr_unlock_bh(dev); 1950 1951 return 0; 1952 } 1953 1954 1955 /* rx/tx queue initialisation ***********************************************/ 1956 static int rxq_init(struct mv643xx_eth_private *mp, int index) 1957 { 1958 struct rx_queue *rxq = mp->rxq + index; 1959 struct rx_desc *rx_desc; 1960 int size; 1961 int i; 1962 1963 rxq->index = index; 1964 1965 rxq->rx_ring_size = mp->rx_ring_size; 1966 1967 rxq->rx_desc_count = 0; 1968 rxq->rx_curr_desc = 0; 1969 rxq->rx_used_desc = 0; 1970 1971 size = rxq->rx_ring_size * sizeof(struct rx_desc); 1972 1973 if (index == 0 && size <= mp->rx_desc_sram_size) { 1974 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr, 1975 mp->rx_desc_sram_size); 1976 rxq->rx_desc_dma = mp->rx_desc_sram_addr; 1977 } else { 1978 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1979 size, &rxq->rx_desc_dma, 1980 GFP_KERNEL); 1981 } 1982 1983 if (rxq->rx_desc_area == NULL) { 1984 netdev_err(mp->dev, 1985 "can't allocate rx ring (%d bytes)\n", size); 1986 goto out; 1987 } 1988 memset(rxq->rx_desc_area, 0, size); 1989 1990 rxq->rx_desc_area_size = size; 1991 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb), 1992 GFP_KERNEL); 1993 if (rxq->rx_skb == NULL) 1994 goto out_free; 1995 1996 rx_desc = rxq->rx_desc_area; 1997 for (i = 0; i < rxq->rx_ring_size; i++) { 1998 int nexti; 1999 2000 nexti = i + 1; 2001 if (nexti == rxq->rx_ring_size) 2002 nexti = 0; 2003 2004 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma + 2005 nexti * sizeof(struct rx_desc); 2006 } 2007 2008 return 0; 2009 2010 2011 out_free: 2012 if (index == 0 && size <= mp->rx_desc_sram_size) 2013 iounmap(rxq->rx_desc_area); 2014 else 2015 dma_free_coherent(mp->dev->dev.parent, size, 2016 rxq->rx_desc_area, 2017 rxq->rx_desc_dma); 2018 2019 out: 2020 return -ENOMEM; 2021 } 2022 2023 static void rxq_deinit(struct rx_queue *rxq) 2024 { 2025 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 2026 int i; 2027 2028 rxq_disable(rxq); 2029 2030 for (i = 0; i < rxq->rx_ring_size; i++) { 2031 if (rxq->rx_skb[i]) { 2032 dev_kfree_skb(rxq->rx_skb[i]); 2033 rxq->rx_desc_count--; 2034 } 2035 } 2036 2037 if (rxq->rx_desc_count) { 2038 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n", 2039 rxq->rx_desc_count); 2040 } 2041 2042 if (rxq->index == 0 && 2043 rxq->rx_desc_area_size <= mp->rx_desc_sram_size) 2044 iounmap(rxq->rx_desc_area); 2045 else 2046 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, 2047 rxq->rx_desc_area, rxq->rx_desc_dma); 2048 2049 kfree(rxq->rx_skb); 2050 } 2051 2052 static int txq_init(struct mv643xx_eth_private *mp, int index) 2053 { 2054 struct tx_queue *txq = mp->txq + index; 2055 struct tx_desc *tx_desc; 2056 int size; 2057 int ret; 2058 int i; 2059 2060 txq->index = index; 2061 2062 txq->tx_ring_size = mp->tx_ring_size; 2063 2064 /* A queue must always have room for at least one skb. 2065 * Therefore, stop the queue when the free entries reaches 2066 * the maximum number of descriptors per skb. 2067 */ 2068 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS; 2069 txq->tx_wake_threshold = txq->tx_stop_threshold / 2; 2070 2071 txq->tx_desc_count = 0; 2072 txq->tx_curr_desc = 0; 2073 txq->tx_used_desc = 0; 2074 2075 size = txq->tx_ring_size * sizeof(struct tx_desc); 2076 2077 if (index == 0 && size <= mp->tx_desc_sram_size) { 2078 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, 2079 mp->tx_desc_sram_size); 2080 txq->tx_desc_dma = mp->tx_desc_sram_addr; 2081 } else { 2082 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 2083 size, &txq->tx_desc_dma, 2084 GFP_KERNEL); 2085 } 2086 2087 if (txq->tx_desc_area == NULL) { 2088 netdev_err(mp->dev, 2089 "can't allocate tx ring (%d bytes)\n", size); 2090 return -ENOMEM; 2091 } 2092 memset(txq->tx_desc_area, 0, size); 2093 2094 txq->tx_desc_area_size = size; 2095 2096 tx_desc = txq->tx_desc_area; 2097 for (i = 0; i < txq->tx_ring_size; i++) { 2098 struct tx_desc *txd = tx_desc + i; 2099 int nexti; 2100 2101 nexti = i + 1; 2102 if (nexti == txq->tx_ring_size) 2103 nexti = 0; 2104 2105 txd->cmd_sts = 0; 2106 txd->next_desc_ptr = txq->tx_desc_dma + 2107 nexti * sizeof(struct tx_desc); 2108 } 2109 2110 txq->tx_desc_mapping = kcalloc(txq->tx_ring_size, sizeof(char), 2111 GFP_KERNEL); 2112 if (!txq->tx_desc_mapping) { 2113 ret = -ENOMEM; 2114 goto err_free_desc_area; 2115 } 2116 2117 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ 2118 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent, 2119 txq->tx_ring_size * TSO_HEADER_SIZE, 2120 &txq->tso_hdrs_dma, GFP_KERNEL); 2121 if (txq->tso_hdrs == NULL) { 2122 ret = -ENOMEM; 2123 goto err_free_desc_mapping; 2124 } 2125 skb_queue_head_init(&txq->tx_skb); 2126 2127 return 0; 2128 2129 err_free_desc_mapping: 2130 kfree(txq->tx_desc_mapping); 2131 err_free_desc_area: 2132 if (index == 0 && size <= mp->tx_desc_sram_size) 2133 iounmap(txq->tx_desc_area); 2134 else 2135 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2136 txq->tx_desc_area, txq->tx_desc_dma); 2137 return ret; 2138 } 2139 2140 static void txq_deinit(struct tx_queue *txq) 2141 { 2142 struct mv643xx_eth_private *mp = txq_to_mp(txq); 2143 2144 txq_disable(txq); 2145 txq_reclaim(txq, txq->tx_ring_size, 1); 2146 2147 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); 2148 2149 if (txq->index == 0 && 2150 txq->tx_desc_area_size <= mp->tx_desc_sram_size) 2151 iounmap(txq->tx_desc_area); 2152 else 2153 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2154 txq->tx_desc_area, txq->tx_desc_dma); 2155 kfree(txq->tx_desc_mapping); 2156 2157 if (txq->tso_hdrs) 2158 dma_free_coherent(mp->dev->dev.parent, 2159 txq->tx_ring_size * TSO_HEADER_SIZE, 2160 txq->tso_hdrs, txq->tso_hdrs_dma); 2161 } 2162 2163 2164 /* netdev ops and related ***************************************************/ 2165 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) 2166 { 2167 u32 int_cause; 2168 u32 int_cause_ext; 2169 2170 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; 2171 if (int_cause == 0) 2172 return 0; 2173 2174 int_cause_ext = 0; 2175 if (int_cause & INT_EXT) { 2176 int_cause &= ~INT_EXT; 2177 int_cause_ext = rdlp(mp, INT_CAUSE_EXT); 2178 } 2179 2180 if (int_cause) { 2181 wrlp(mp, INT_CAUSE, ~int_cause); 2182 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & 2183 ~(rdlp(mp, TXQ_COMMAND) & 0xff); 2184 mp->work_rx |= (int_cause & INT_RX) >> 2; 2185 } 2186 2187 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; 2188 if (int_cause_ext) { 2189 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); 2190 if (int_cause_ext & INT_EXT_LINK_PHY) 2191 mp->work_link = 1; 2192 mp->work_tx |= int_cause_ext & INT_EXT_TX; 2193 } 2194 2195 return 1; 2196 } 2197 2198 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) 2199 { 2200 struct net_device *dev = (struct net_device *)dev_id; 2201 struct mv643xx_eth_private *mp = netdev_priv(dev); 2202 2203 if (unlikely(!mv643xx_eth_collect_events(mp))) 2204 return IRQ_NONE; 2205 2206 wrlp(mp, INT_MASK, 0); 2207 napi_schedule(&mp->napi); 2208 2209 return IRQ_HANDLED; 2210 } 2211 2212 static void handle_link_event(struct mv643xx_eth_private *mp) 2213 { 2214 struct net_device *dev = mp->dev; 2215 u32 port_status; 2216 int speed; 2217 int duplex; 2218 int fc; 2219 2220 port_status = rdlp(mp, PORT_STATUS); 2221 if (!(port_status & LINK_UP)) { 2222 if (netif_carrier_ok(dev)) { 2223 int i; 2224 2225 netdev_info(dev, "link down\n"); 2226 2227 netif_carrier_off(dev); 2228 2229 for (i = 0; i < mp->txq_count; i++) { 2230 struct tx_queue *txq = mp->txq + i; 2231 2232 txq_reclaim(txq, txq->tx_ring_size, 1); 2233 txq_reset_hw_ptr(txq); 2234 } 2235 } 2236 return; 2237 } 2238 2239 switch (port_status & PORT_SPEED_MASK) { 2240 case PORT_SPEED_10: 2241 speed = 10; 2242 break; 2243 case PORT_SPEED_100: 2244 speed = 100; 2245 break; 2246 case PORT_SPEED_1000: 2247 speed = 1000; 2248 break; 2249 default: 2250 speed = -1; 2251 break; 2252 } 2253 duplex = (port_status & FULL_DUPLEX) ? 1 : 0; 2254 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; 2255 2256 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n", 2257 speed, duplex ? "full" : "half", fc ? "en" : "dis"); 2258 2259 if (!netif_carrier_ok(dev)) 2260 netif_carrier_on(dev); 2261 } 2262 2263 static int mv643xx_eth_poll(struct napi_struct *napi, int budget) 2264 { 2265 struct mv643xx_eth_private *mp; 2266 int work_done; 2267 2268 mp = container_of(napi, struct mv643xx_eth_private, napi); 2269 2270 if (unlikely(mp->oom)) { 2271 mp->oom = 0; 2272 del_timer(&mp->rx_oom); 2273 } 2274 2275 work_done = 0; 2276 while (work_done < budget) { 2277 u8 queue_mask; 2278 int queue; 2279 int work_tbd; 2280 2281 if (mp->work_link) { 2282 mp->work_link = 0; 2283 handle_link_event(mp); 2284 work_done++; 2285 continue; 2286 } 2287 2288 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; 2289 if (likely(!mp->oom)) 2290 queue_mask |= mp->work_rx_refill; 2291 2292 if (!queue_mask) { 2293 if (mv643xx_eth_collect_events(mp)) 2294 continue; 2295 break; 2296 } 2297 2298 queue = fls(queue_mask) - 1; 2299 queue_mask = 1 << queue; 2300 2301 work_tbd = budget - work_done; 2302 if (work_tbd > 16) 2303 work_tbd = 16; 2304 2305 if (mp->work_tx_end & queue_mask) { 2306 txq_kick(mp->txq + queue); 2307 } else if (mp->work_tx & queue_mask) { 2308 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); 2309 txq_maybe_wake(mp->txq + queue); 2310 } else if (mp->work_rx & queue_mask) { 2311 work_done += rxq_process(mp->rxq + queue, work_tbd); 2312 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { 2313 work_done += rxq_refill(mp->rxq + queue, work_tbd); 2314 } else { 2315 BUG(); 2316 } 2317 } 2318 2319 if (work_done < budget) { 2320 if (mp->oom) 2321 mod_timer(&mp->rx_oom, jiffies + (HZ / 10)); 2322 napi_complete(napi); 2323 wrlp(mp, INT_MASK, mp->int_mask); 2324 } 2325 2326 return work_done; 2327 } 2328 2329 static inline void oom_timer_wrapper(unsigned long data) 2330 { 2331 struct mv643xx_eth_private *mp = (void *)data; 2332 2333 napi_schedule(&mp->napi); 2334 } 2335 2336 static void port_start(struct mv643xx_eth_private *mp) 2337 { 2338 struct net_device *dev = mp->dev; 2339 u32 pscr; 2340 int i; 2341 2342 /* 2343 * Perform PHY reset, if there is a PHY. 2344 */ 2345 if (dev->phydev) { 2346 struct ethtool_link_ksettings cmd; 2347 2348 mv643xx_eth_get_link_ksettings(dev, &cmd); 2349 phy_init_hw(dev->phydev); 2350 mv643xx_eth_set_link_ksettings( 2351 dev, (const struct ethtool_link_ksettings *)&cmd); 2352 phy_start(dev->phydev); 2353 } 2354 2355 /* 2356 * Configure basic link parameters. 2357 */ 2358 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2359 2360 pscr |= SERIAL_PORT_ENABLE; 2361 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2362 2363 pscr |= DO_NOT_FORCE_LINK_FAIL; 2364 if (!dev->phydev) 2365 pscr |= FORCE_LINK_PASS; 2366 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2367 2368 /* 2369 * Configure TX path and queues. 2370 */ 2371 tx_set_rate(mp, 1000000000, 16777216); 2372 for (i = 0; i < mp->txq_count; i++) { 2373 struct tx_queue *txq = mp->txq + i; 2374 2375 txq_reset_hw_ptr(txq); 2376 txq_set_rate(txq, 1000000000, 16777216); 2377 txq_set_fixed_prio_mode(txq); 2378 } 2379 2380 /* 2381 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast 2382 * frames to RX queue #0, and include the pseudo-header when 2383 * calculating receive checksums. 2384 */ 2385 mv643xx_eth_set_features(mp->dev, mp->dev->features); 2386 2387 /* 2388 * Treat BPDUs as normal multicasts, and disable partition mode. 2389 */ 2390 wrlp(mp, PORT_CONFIG_EXT, 0x00000000); 2391 2392 /* 2393 * Add configured unicast addresses to address filter table. 2394 */ 2395 mv643xx_eth_program_unicast_filter(mp->dev); 2396 2397 /* 2398 * Enable the receive queues. 2399 */ 2400 for (i = 0; i < mp->rxq_count; i++) { 2401 struct rx_queue *rxq = mp->rxq + i; 2402 u32 addr; 2403 2404 addr = (u32)rxq->rx_desc_dma; 2405 addr += rxq->rx_curr_desc * sizeof(struct rx_desc); 2406 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr); 2407 2408 rxq_enable(rxq); 2409 } 2410 } 2411 2412 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp) 2413 { 2414 int skb_size; 2415 2416 /* 2417 * Reserve 2+14 bytes for an ethernet header (the hardware 2418 * automatically prepends 2 bytes of dummy data to each 2419 * received packet), 16 bytes for up to four VLAN tags, and 2420 * 4 bytes for the trailing FCS -- 36 bytes total. 2421 */ 2422 skb_size = mp->dev->mtu + 36; 2423 2424 /* 2425 * Make sure that the skb size is a multiple of 8 bytes, as 2426 * the lower three bits of the receive descriptor's buffer 2427 * size field are ignored by the hardware. 2428 */ 2429 mp->skb_size = (skb_size + 7) & ~7; 2430 2431 /* 2432 * If NET_SKB_PAD is smaller than a cache line, 2433 * netdev_alloc_skb() will cause skb->data to be misaligned 2434 * to a cache line boundary. If this is the case, include 2435 * some extra space to allow re-aligning the data area. 2436 */ 2437 mp->skb_size += SKB_DMA_REALIGN; 2438 } 2439 2440 static int mv643xx_eth_open(struct net_device *dev) 2441 { 2442 struct mv643xx_eth_private *mp = netdev_priv(dev); 2443 int err; 2444 int i; 2445 2446 wrlp(mp, INT_CAUSE, 0); 2447 wrlp(mp, INT_CAUSE_EXT, 0); 2448 rdlp(mp, INT_CAUSE_EXT); 2449 2450 err = request_irq(dev->irq, mv643xx_eth_irq, 2451 IRQF_SHARED, dev->name, dev); 2452 if (err) { 2453 netdev_err(dev, "can't assign irq\n"); 2454 return -EAGAIN; 2455 } 2456 2457 mv643xx_eth_recalc_skb_size(mp); 2458 2459 napi_enable(&mp->napi); 2460 2461 mp->int_mask = INT_EXT; 2462 2463 for (i = 0; i < mp->rxq_count; i++) { 2464 err = rxq_init(mp, i); 2465 if (err) { 2466 while (--i >= 0) 2467 rxq_deinit(mp->rxq + i); 2468 goto out; 2469 } 2470 2471 rxq_refill(mp->rxq + i, INT_MAX); 2472 mp->int_mask |= INT_RX_0 << i; 2473 } 2474 2475 if (mp->oom) { 2476 mp->rx_oom.expires = jiffies + (HZ / 10); 2477 add_timer(&mp->rx_oom); 2478 } 2479 2480 for (i = 0; i < mp->txq_count; i++) { 2481 err = txq_init(mp, i); 2482 if (err) { 2483 while (--i >= 0) 2484 txq_deinit(mp->txq + i); 2485 goto out_free; 2486 } 2487 mp->int_mask |= INT_TX_END_0 << i; 2488 } 2489 2490 add_timer(&mp->mib_counters_timer); 2491 port_start(mp); 2492 2493 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); 2494 wrlp(mp, INT_MASK, mp->int_mask); 2495 2496 return 0; 2497 2498 2499 out_free: 2500 for (i = 0; i < mp->rxq_count; i++) 2501 rxq_deinit(mp->rxq + i); 2502 out: 2503 free_irq(dev->irq, dev); 2504 2505 return err; 2506 } 2507 2508 static void port_reset(struct mv643xx_eth_private *mp) 2509 { 2510 unsigned int data; 2511 int i; 2512 2513 for (i = 0; i < mp->rxq_count; i++) 2514 rxq_disable(mp->rxq + i); 2515 for (i = 0; i < mp->txq_count; i++) 2516 txq_disable(mp->txq + i); 2517 2518 while (1) { 2519 u32 ps = rdlp(mp, PORT_STATUS); 2520 2521 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) 2522 break; 2523 udelay(10); 2524 } 2525 2526 /* Reset the Enable bit in the Configuration Register */ 2527 data = rdlp(mp, PORT_SERIAL_CONTROL); 2528 data &= ~(SERIAL_PORT_ENABLE | 2529 DO_NOT_FORCE_LINK_FAIL | 2530 FORCE_LINK_PASS); 2531 wrlp(mp, PORT_SERIAL_CONTROL, data); 2532 } 2533 2534 static int mv643xx_eth_stop(struct net_device *dev) 2535 { 2536 struct mv643xx_eth_private *mp = netdev_priv(dev); 2537 int i; 2538 2539 wrlp(mp, INT_MASK_EXT, 0x00000000); 2540 wrlp(mp, INT_MASK, 0x00000000); 2541 rdlp(mp, INT_MASK); 2542 2543 napi_disable(&mp->napi); 2544 2545 del_timer_sync(&mp->rx_oom); 2546 2547 netif_carrier_off(dev); 2548 if (dev->phydev) 2549 phy_stop(dev->phydev); 2550 free_irq(dev->irq, dev); 2551 2552 port_reset(mp); 2553 mv643xx_eth_get_stats(dev); 2554 mib_counters_update(mp); 2555 del_timer_sync(&mp->mib_counters_timer); 2556 2557 for (i = 0; i < mp->rxq_count; i++) 2558 rxq_deinit(mp->rxq + i); 2559 for (i = 0; i < mp->txq_count; i++) 2560 txq_deinit(mp->txq + i); 2561 2562 return 0; 2563 } 2564 2565 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2566 { 2567 int ret; 2568 2569 if (!dev->phydev) 2570 return -ENOTSUPP; 2571 2572 ret = phy_mii_ioctl(dev->phydev, ifr, cmd); 2573 if (!ret) 2574 mv643xx_eth_adjust_link(dev); 2575 return ret; 2576 } 2577 2578 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 2579 { 2580 struct mv643xx_eth_private *mp = netdev_priv(dev); 2581 2582 dev->mtu = new_mtu; 2583 mv643xx_eth_recalc_skb_size(mp); 2584 tx_set_rate(mp, 1000000000, 16777216); 2585 2586 if (!netif_running(dev)) 2587 return 0; 2588 2589 /* 2590 * Stop and then re-open the interface. This will allocate RX 2591 * skbs of the new MTU. 2592 * There is a possible danger that the open will not succeed, 2593 * due to memory being full. 2594 */ 2595 mv643xx_eth_stop(dev); 2596 if (mv643xx_eth_open(dev)) { 2597 netdev_err(dev, 2598 "fatal error on re-opening device after MTU change\n"); 2599 } 2600 2601 return 0; 2602 } 2603 2604 static void tx_timeout_task(struct work_struct *ugly) 2605 { 2606 struct mv643xx_eth_private *mp; 2607 2608 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task); 2609 if (netif_running(mp->dev)) { 2610 netif_tx_stop_all_queues(mp->dev); 2611 port_reset(mp); 2612 port_start(mp); 2613 netif_tx_wake_all_queues(mp->dev); 2614 } 2615 } 2616 2617 static void mv643xx_eth_tx_timeout(struct net_device *dev) 2618 { 2619 struct mv643xx_eth_private *mp = netdev_priv(dev); 2620 2621 netdev_info(dev, "tx timeout\n"); 2622 2623 schedule_work(&mp->tx_timeout_task); 2624 } 2625 2626 #ifdef CONFIG_NET_POLL_CONTROLLER 2627 static void mv643xx_eth_netpoll(struct net_device *dev) 2628 { 2629 struct mv643xx_eth_private *mp = netdev_priv(dev); 2630 2631 wrlp(mp, INT_MASK, 0x00000000); 2632 rdlp(mp, INT_MASK); 2633 2634 mv643xx_eth_irq(dev->irq, dev); 2635 2636 wrlp(mp, INT_MASK, mp->int_mask); 2637 } 2638 #endif 2639 2640 2641 /* platform glue ************************************************************/ 2642 static void 2643 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, 2644 const struct mbus_dram_target_info *dram) 2645 { 2646 void __iomem *base = msp->base; 2647 u32 win_enable; 2648 u32 win_protect; 2649 int i; 2650 2651 for (i = 0; i < 6; i++) { 2652 writel(0, base + WINDOW_BASE(i)); 2653 writel(0, base + WINDOW_SIZE(i)); 2654 if (i < 4) 2655 writel(0, base + WINDOW_REMAP_HIGH(i)); 2656 } 2657 2658 win_enable = 0x3f; 2659 win_protect = 0; 2660 2661 for (i = 0; i < dram->num_cs; i++) { 2662 const struct mbus_dram_window *cs = dram->cs + i; 2663 2664 writel((cs->base & 0xffff0000) | 2665 (cs->mbus_attr << 8) | 2666 dram->mbus_dram_target_id, base + WINDOW_BASE(i)); 2667 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); 2668 2669 win_enable &= ~(1 << i); 2670 win_protect |= 3 << (2 * i); 2671 } 2672 2673 writel(win_enable, base + WINDOW_BAR_ENABLE); 2674 msp->win_protect = win_protect; 2675 } 2676 2677 static void infer_hw_params(struct mv643xx_eth_shared_private *msp) 2678 { 2679 /* 2680 * Check whether we have a 14-bit coal limit field in bits 2681 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the 2682 * SDMA config register. 2683 */ 2684 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); 2685 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) 2686 msp->extended_rx_coal_limit = 1; 2687 else 2688 msp->extended_rx_coal_limit = 0; 2689 2690 /* 2691 * Check whether the MAC supports TX rate control, and if 2692 * yes, whether its associated registers are in the old or 2693 * the new place. 2694 */ 2695 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); 2696 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { 2697 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; 2698 } else { 2699 writel(7, msp->base + 0x0400 + TX_BW_RATE); 2700 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) 2701 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; 2702 else 2703 msp->tx_bw_control = TX_BW_CONTROL_ABSENT; 2704 } 2705 } 2706 2707 #if defined(CONFIG_OF) 2708 static const struct of_device_id mv643xx_eth_shared_ids[] = { 2709 { .compatible = "marvell,orion-eth", }, 2710 { .compatible = "marvell,kirkwood-eth", }, 2711 { } 2712 }; 2713 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); 2714 #endif 2715 2716 #if defined(CONFIG_OF_IRQ) && !defined(CONFIG_MV64X60) 2717 #define mv643xx_eth_property(_np, _name, _v) \ 2718 do { \ 2719 u32 tmp; \ 2720 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ 2721 _v = tmp; \ 2722 } while (0) 2723 2724 static struct platform_device *port_platdev[3]; 2725 2726 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, 2727 struct device_node *pnp) 2728 { 2729 struct platform_device *ppdev; 2730 struct mv643xx_eth_platform_data ppd; 2731 struct resource res; 2732 const char *mac_addr; 2733 int ret; 2734 int dev_num = 0; 2735 2736 memset(&ppd, 0, sizeof(ppd)); 2737 ppd.shared = pdev; 2738 2739 memset(&res, 0, sizeof(res)); 2740 if (!of_irq_to_resource(pnp, 0, &res)) { 2741 dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name); 2742 return -EINVAL; 2743 } 2744 2745 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { 2746 dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name); 2747 return -EINVAL; 2748 } 2749 2750 if (ppd.port_number >= 3) { 2751 dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name); 2752 return -EINVAL; 2753 } 2754 2755 while (dev_num < 3 && port_platdev[dev_num]) 2756 dev_num++; 2757 2758 if (dev_num == 3) { 2759 dev_err(&pdev->dev, "too many ports registered\n"); 2760 return -EINVAL; 2761 } 2762 2763 mac_addr = of_get_mac_address(pnp); 2764 if (mac_addr) 2765 memcpy(ppd.mac_addr, mac_addr, ETH_ALEN); 2766 2767 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); 2768 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); 2769 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); 2770 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); 2771 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); 2772 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); 2773 2774 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); 2775 if (!ppd.phy_node) { 2776 ppd.phy_addr = MV643XX_ETH_PHY_NONE; 2777 of_property_read_u32(pnp, "speed", &ppd.speed); 2778 of_property_read_u32(pnp, "duplex", &ppd.duplex); 2779 } 2780 2781 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); 2782 if (!ppdev) 2783 return -ENOMEM; 2784 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 2785 ppdev->dev.of_node = pnp; 2786 2787 ret = platform_device_add_resources(ppdev, &res, 1); 2788 if (ret) 2789 goto port_err; 2790 2791 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); 2792 if (ret) 2793 goto port_err; 2794 2795 ret = platform_device_add(ppdev); 2796 if (ret) 2797 goto port_err; 2798 2799 port_platdev[dev_num] = ppdev; 2800 2801 return 0; 2802 2803 port_err: 2804 platform_device_put(ppdev); 2805 return ret; 2806 } 2807 2808 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2809 { 2810 struct mv643xx_eth_shared_platform_data *pd; 2811 struct device_node *pnp, *np = pdev->dev.of_node; 2812 int ret; 2813 2814 /* bail out if not registered from DT */ 2815 if (!np) 2816 return 0; 2817 2818 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); 2819 if (!pd) 2820 return -ENOMEM; 2821 pdev->dev.platform_data = pd; 2822 2823 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); 2824 2825 for_each_available_child_of_node(np, pnp) { 2826 ret = mv643xx_eth_shared_of_add_port(pdev, pnp); 2827 if (ret) { 2828 of_node_put(pnp); 2829 return ret; 2830 } 2831 } 2832 return 0; 2833 } 2834 2835 static void mv643xx_eth_shared_of_remove(void) 2836 { 2837 int n; 2838 2839 for (n = 0; n < 3; n++) { 2840 platform_device_del(port_platdev[n]); 2841 port_platdev[n] = NULL; 2842 } 2843 } 2844 #else 2845 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2846 { 2847 return 0; 2848 } 2849 2850 static inline void mv643xx_eth_shared_of_remove(void) 2851 { 2852 } 2853 #endif 2854 2855 static int mv643xx_eth_shared_probe(struct platform_device *pdev) 2856 { 2857 static int mv643xx_eth_version_printed; 2858 struct mv643xx_eth_shared_platform_data *pd; 2859 struct mv643xx_eth_shared_private *msp; 2860 const struct mbus_dram_target_info *dram; 2861 struct resource *res; 2862 int ret; 2863 2864 if (!mv643xx_eth_version_printed++) 2865 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", 2866 mv643xx_eth_driver_version); 2867 2868 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2869 if (res == NULL) 2870 return -EINVAL; 2871 2872 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); 2873 if (msp == NULL) 2874 return -ENOMEM; 2875 platform_set_drvdata(pdev, msp); 2876 2877 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 2878 if (msp->base == NULL) 2879 return -ENOMEM; 2880 2881 msp->clk = devm_clk_get(&pdev->dev, NULL); 2882 if (!IS_ERR(msp->clk)) 2883 clk_prepare_enable(msp->clk); 2884 2885 /* 2886 * (Re-)program MBUS remapping windows if we are asked to. 2887 */ 2888 dram = mv_mbus_dram_info(); 2889 if (dram) 2890 mv643xx_eth_conf_mbus_windows(msp, dram); 2891 2892 ret = mv643xx_eth_shared_of_probe(pdev); 2893 if (ret) 2894 return ret; 2895 pd = dev_get_platdata(&pdev->dev); 2896 2897 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? 2898 pd->tx_csum_limit : 9 * 1024; 2899 infer_hw_params(msp); 2900 2901 return 0; 2902 } 2903 2904 static int mv643xx_eth_shared_remove(struct platform_device *pdev) 2905 { 2906 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); 2907 2908 mv643xx_eth_shared_of_remove(); 2909 if (!IS_ERR(msp->clk)) 2910 clk_disable_unprepare(msp->clk); 2911 return 0; 2912 } 2913 2914 static struct platform_driver mv643xx_eth_shared_driver = { 2915 .probe = mv643xx_eth_shared_probe, 2916 .remove = mv643xx_eth_shared_remove, 2917 .driver = { 2918 .name = MV643XX_ETH_SHARED_NAME, 2919 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), 2920 }, 2921 }; 2922 2923 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) 2924 { 2925 int addr_shift = 5 * mp->port_num; 2926 u32 data; 2927 2928 data = rdl(mp, PHY_ADDR); 2929 data &= ~(0x1f << addr_shift); 2930 data |= (phy_addr & 0x1f) << addr_shift; 2931 wrl(mp, PHY_ADDR, data); 2932 } 2933 2934 static int phy_addr_get(struct mv643xx_eth_private *mp) 2935 { 2936 unsigned int data; 2937 2938 data = rdl(mp, PHY_ADDR); 2939 2940 return (data >> (5 * mp->port_num)) & 0x1f; 2941 } 2942 2943 static void set_params(struct mv643xx_eth_private *mp, 2944 struct mv643xx_eth_platform_data *pd) 2945 { 2946 struct net_device *dev = mp->dev; 2947 unsigned int tx_ring_size; 2948 2949 if (is_valid_ether_addr(pd->mac_addr)) 2950 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN); 2951 else 2952 uc_addr_get(mp, dev->dev_addr); 2953 2954 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE; 2955 if (pd->rx_queue_size) 2956 mp->rx_ring_size = pd->rx_queue_size; 2957 mp->rx_desc_sram_addr = pd->rx_sram_addr; 2958 mp->rx_desc_sram_size = pd->rx_sram_size; 2959 2960 mp->rxq_count = pd->rx_queue_count ? : 1; 2961 2962 tx_ring_size = DEFAULT_TX_QUEUE_SIZE; 2963 if (pd->tx_queue_size) 2964 tx_ring_size = pd->tx_queue_size; 2965 2966 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size, 2967 MV643XX_MAX_SKB_DESCS * 2, 4096); 2968 if (mp->tx_ring_size != tx_ring_size) 2969 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 2970 mp->tx_ring_size, tx_ring_size); 2971 2972 mp->tx_desc_sram_addr = pd->tx_sram_addr; 2973 mp->tx_desc_sram_size = pd->tx_sram_size; 2974 2975 mp->txq_count = pd->tx_queue_count ? : 1; 2976 } 2977 2978 static int get_phy_mode(struct mv643xx_eth_private *mp) 2979 { 2980 struct device *dev = mp->dev->dev.parent; 2981 int iface = -1; 2982 2983 if (dev->of_node) 2984 iface = of_get_phy_mode(dev->of_node); 2985 2986 /* Historical default if unspecified. We could also read/write 2987 * the interface state in the PSC1 2988 */ 2989 if (iface < 0) 2990 iface = PHY_INTERFACE_MODE_GMII; 2991 return iface; 2992 } 2993 2994 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp, 2995 int phy_addr) 2996 { 2997 struct phy_device *phydev; 2998 int start; 2999 int num; 3000 int i; 3001 char phy_id[MII_BUS_ID_SIZE + 3]; 3002 3003 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { 3004 start = phy_addr_get(mp) & 0x1f; 3005 num = 32; 3006 } else { 3007 start = phy_addr & 0x1f; 3008 num = 1; 3009 } 3010 3011 /* Attempt to connect to the PHY using orion-mdio */ 3012 phydev = ERR_PTR(-ENODEV); 3013 for (i = 0; i < num; i++) { 3014 int addr = (start + i) & 0x1f; 3015 3016 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, 3017 "orion-mdio-mii", addr); 3018 3019 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, 3020 get_phy_mode(mp)); 3021 if (!IS_ERR(phydev)) { 3022 phy_addr_set(mp, addr); 3023 break; 3024 } 3025 } 3026 3027 return phydev; 3028 } 3029 3030 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) 3031 { 3032 struct net_device *dev = mp->dev; 3033 struct phy_device *phy = dev->phydev; 3034 3035 if (speed == 0) { 3036 phy->autoneg = AUTONEG_ENABLE; 3037 phy->speed = 0; 3038 phy->duplex = 0; 3039 phy->advertising = phy->supported | ADVERTISED_Autoneg; 3040 } else { 3041 phy->autoneg = AUTONEG_DISABLE; 3042 phy->advertising = 0; 3043 phy->speed = speed; 3044 phy->duplex = duplex; 3045 } 3046 phy_start_aneg(phy); 3047 } 3048 3049 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) 3050 { 3051 struct net_device *dev = mp->dev; 3052 u32 pscr; 3053 3054 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 3055 if (pscr & SERIAL_PORT_ENABLE) { 3056 pscr &= ~SERIAL_PORT_ENABLE; 3057 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3058 } 3059 3060 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; 3061 if (!dev->phydev) { 3062 pscr |= DISABLE_AUTO_NEG_SPEED_GMII; 3063 if (speed == SPEED_1000) 3064 pscr |= SET_GMII_SPEED_TO_1000; 3065 else if (speed == SPEED_100) 3066 pscr |= SET_MII_SPEED_TO_100; 3067 3068 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; 3069 3070 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; 3071 if (duplex == DUPLEX_FULL) 3072 pscr |= SET_FULL_DUPLEX_MODE; 3073 } 3074 3075 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3076 } 3077 3078 static const struct net_device_ops mv643xx_eth_netdev_ops = { 3079 .ndo_open = mv643xx_eth_open, 3080 .ndo_stop = mv643xx_eth_stop, 3081 .ndo_start_xmit = mv643xx_eth_xmit, 3082 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, 3083 .ndo_set_mac_address = mv643xx_eth_set_mac_address, 3084 .ndo_validate_addr = eth_validate_addr, 3085 .ndo_do_ioctl = mv643xx_eth_ioctl, 3086 .ndo_change_mtu = mv643xx_eth_change_mtu, 3087 .ndo_set_features = mv643xx_eth_set_features, 3088 .ndo_tx_timeout = mv643xx_eth_tx_timeout, 3089 .ndo_get_stats = mv643xx_eth_get_stats, 3090 #ifdef CONFIG_NET_POLL_CONTROLLER 3091 .ndo_poll_controller = mv643xx_eth_netpoll, 3092 #endif 3093 }; 3094 3095 static int mv643xx_eth_probe(struct platform_device *pdev) 3096 { 3097 struct mv643xx_eth_platform_data *pd; 3098 struct mv643xx_eth_private *mp; 3099 struct net_device *dev; 3100 struct phy_device *phydev = NULL; 3101 struct resource *res; 3102 int err; 3103 3104 pd = dev_get_platdata(&pdev->dev); 3105 if (pd == NULL) { 3106 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); 3107 return -ENODEV; 3108 } 3109 3110 if (pd->shared == NULL) { 3111 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); 3112 return -ENODEV; 3113 } 3114 3115 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); 3116 if (!dev) 3117 return -ENOMEM; 3118 3119 SET_NETDEV_DEV(dev, &pdev->dev); 3120 mp = netdev_priv(dev); 3121 platform_set_drvdata(pdev, mp); 3122 3123 mp->shared = platform_get_drvdata(pd->shared); 3124 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); 3125 mp->port_num = pd->port_number; 3126 3127 mp->dev = dev; 3128 3129 /* Kirkwood resets some registers on gated clocks. Especially 3130 * CLK125_BYPASS_EN must be cleared but is not available on 3131 * all other SoCs/System Controllers using this driver. 3132 */ 3133 if (of_device_is_compatible(pdev->dev.of_node, 3134 "marvell,kirkwood-eth-port")) 3135 wrlp(mp, PORT_SERIAL_CONTROL1, 3136 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); 3137 3138 /* 3139 * Start with a default rate, and if there is a clock, allow 3140 * it to override the default. 3141 */ 3142 mp->t_clk = 133000000; 3143 mp->clk = devm_clk_get(&pdev->dev, NULL); 3144 if (!IS_ERR(mp->clk)) { 3145 clk_prepare_enable(mp->clk); 3146 mp->t_clk = clk_get_rate(mp->clk); 3147 } else if (!IS_ERR(mp->shared->clk)) { 3148 mp->t_clk = clk_get_rate(mp->shared->clk); 3149 } 3150 3151 set_params(mp, pd); 3152 netif_set_real_num_tx_queues(dev, mp->txq_count); 3153 netif_set_real_num_rx_queues(dev, mp->rxq_count); 3154 3155 err = 0; 3156 if (pd->phy_node) { 3157 phydev = of_phy_connect(mp->dev, pd->phy_node, 3158 mv643xx_eth_adjust_link, 0, 3159 get_phy_mode(mp)); 3160 if (!phydev) 3161 err = -ENODEV; 3162 else 3163 phy_addr_set(mp, phydev->mdio.addr); 3164 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { 3165 phydev = phy_scan(mp, pd->phy_addr); 3166 3167 if (IS_ERR(phydev)) 3168 err = PTR_ERR(phydev); 3169 else 3170 phy_init(mp, pd->speed, pd->duplex); 3171 } 3172 if (err == -ENODEV) { 3173 err = -EPROBE_DEFER; 3174 goto out; 3175 } 3176 if (err) 3177 goto out; 3178 3179 dev->ethtool_ops = &mv643xx_eth_ethtool_ops; 3180 3181 init_pscr(mp, pd->speed, pd->duplex); 3182 3183 3184 mib_counters_clear(mp); 3185 3186 setup_timer(&mp->mib_counters_timer, mib_counters_timer_wrapper, 3187 (unsigned long)mp); 3188 mp->mib_counters_timer.expires = jiffies + 30 * HZ; 3189 3190 spin_lock_init(&mp->mib_counters_lock); 3191 3192 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); 3193 3194 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT); 3195 3196 setup_timer(&mp->rx_oom, oom_timer_wrapper, (unsigned long)mp); 3197 3198 3199 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 3200 BUG_ON(!res); 3201 dev->irq = res->start; 3202 3203 dev->netdev_ops = &mv643xx_eth_netdev_ops; 3204 3205 dev->watchdog_timeo = 2 * HZ; 3206 dev->base_addr = 0; 3207 3208 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; 3209 dev->vlan_features = dev->features; 3210 3211 dev->features |= NETIF_F_RXCSUM; 3212 dev->hw_features = dev->features; 3213 3214 dev->priv_flags |= IFF_UNICAST_FLT; 3215 dev->gso_max_segs = MV643XX_MAX_TSO_SEGS; 3216 3217 /* MTU range: 64 - 9500 */ 3218 dev->min_mtu = 64; 3219 dev->max_mtu = 9500; 3220 3221 if (mp->shared->win_protect) 3222 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); 3223 3224 netif_carrier_off(dev); 3225 3226 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); 3227 3228 set_rx_coal(mp, 250); 3229 set_tx_coal(mp, 0); 3230 3231 err = register_netdev(dev); 3232 if (err) 3233 goto out; 3234 3235 netdev_notice(dev, "port %d with MAC address %pM\n", 3236 mp->port_num, dev->dev_addr); 3237 3238 if (mp->tx_desc_sram_size > 0) 3239 netdev_notice(dev, "configured with sram\n"); 3240 3241 return 0; 3242 3243 out: 3244 if (!IS_ERR(mp->clk)) 3245 clk_disable_unprepare(mp->clk); 3246 free_netdev(dev); 3247 3248 return err; 3249 } 3250 3251 static int mv643xx_eth_remove(struct platform_device *pdev) 3252 { 3253 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3254 struct net_device *dev = mp->dev; 3255 3256 unregister_netdev(mp->dev); 3257 if (dev->phydev) 3258 phy_disconnect(dev->phydev); 3259 cancel_work_sync(&mp->tx_timeout_task); 3260 3261 if (!IS_ERR(mp->clk)) 3262 clk_disable_unprepare(mp->clk); 3263 3264 free_netdev(mp->dev); 3265 3266 return 0; 3267 } 3268 3269 static void mv643xx_eth_shutdown(struct platform_device *pdev) 3270 { 3271 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3272 3273 /* Mask all interrupts on ethernet port */ 3274 wrlp(mp, INT_MASK, 0); 3275 rdlp(mp, INT_MASK); 3276 3277 if (netif_running(mp->dev)) 3278 port_reset(mp); 3279 } 3280 3281 static struct platform_driver mv643xx_eth_driver = { 3282 .probe = mv643xx_eth_probe, 3283 .remove = mv643xx_eth_remove, 3284 .shutdown = mv643xx_eth_shutdown, 3285 .driver = { 3286 .name = MV643XX_ETH_NAME, 3287 }, 3288 }; 3289 3290 static struct platform_driver * const drivers[] = { 3291 &mv643xx_eth_shared_driver, 3292 &mv643xx_eth_driver, 3293 }; 3294 3295 static int __init mv643xx_eth_init_module(void) 3296 { 3297 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 3298 } 3299 module_init(mv643xx_eth_init_module); 3300 3301 static void __exit mv643xx_eth_cleanup_module(void) 3302 { 3303 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 3304 } 3305 module_exit(mv643xx_eth_cleanup_module); 3306 3307 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " 3308 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); 3309 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); 3310 MODULE_LICENSE("GPL"); 3311 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); 3312 MODULE_ALIAS("platform:" MV643XX_ETH_NAME); 3313