1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports 4 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com> 5 * 6 * Based on the 64360 driver from: 7 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il> 8 * Rabeeh Khoury <rabeeh@marvell.com> 9 * 10 * Copyright (C) 2003 PMC-Sierra, Inc., 11 * written by Manish Lachwani 12 * 13 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org> 14 * 15 * Copyright (C) 2004-2006 MontaVista Software, Inc. 16 * Dale Farnsworth <dale@farnsworth.org> 17 * 18 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com> 19 * <sjhill@realitydiluted.com> 20 * 21 * Copyright (C) 2007-2008 Marvell Semiconductor 22 * Lennert Buytenhek <buytenh@marvell.com> 23 * 24 * Copyright (C) 2013 Michael Stapelberg <michael@stapelberg.de> 25 */ 26 27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #include <linux/init.h> 30 #include <linux/dma-mapping.h> 31 #include <linux/in.h> 32 #include <linux/ip.h> 33 #include <net/tso.h> 34 #include <linux/tcp.h> 35 #include <linux/udp.h> 36 #include <linux/etherdevice.h> 37 #include <linux/delay.h> 38 #include <linux/ethtool.h> 39 #include <linux/platform_device.h> 40 #include <linux/module.h> 41 #include <linux/kernel.h> 42 #include <linux/spinlock.h> 43 #include <linux/workqueue.h> 44 #include <linux/phy.h> 45 #include <linux/mv643xx_eth.h> 46 #include <linux/io.h> 47 #include <linux/interrupt.h> 48 #include <linux/types.h> 49 #include <linux/slab.h> 50 #include <linux/clk.h> 51 #include <linux/of.h> 52 #include <linux/of_irq.h> 53 #include <linux/of_net.h> 54 #include <linux/of_mdio.h> 55 56 static char mv643xx_eth_driver_name[] = "mv643xx_eth"; 57 static char mv643xx_eth_driver_version[] = "1.4"; 58 59 60 /* 61 * Registers shared between all ports. 62 */ 63 #define PHY_ADDR 0x0000 64 #define WINDOW_BASE(w) (0x0200 + ((w) << 3)) 65 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3)) 66 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2)) 67 #define WINDOW_BAR_ENABLE 0x0290 68 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4)) 69 70 /* 71 * Main per-port registers. These live at offset 0x0400 for 72 * port #0, 0x0800 for port #1, and 0x0c00 for port #2. 73 */ 74 #define PORT_CONFIG 0x0000 75 #define UNICAST_PROMISCUOUS_MODE 0x00000001 76 #define PORT_CONFIG_EXT 0x0004 77 #define MAC_ADDR_LOW 0x0014 78 #define MAC_ADDR_HIGH 0x0018 79 #define SDMA_CONFIG 0x001c 80 #define TX_BURST_SIZE_16_64BIT 0x01000000 81 #define TX_BURST_SIZE_4_64BIT 0x00800000 82 #define BLM_TX_NO_SWAP 0x00000020 83 #define BLM_RX_NO_SWAP 0x00000010 84 #define RX_BURST_SIZE_16_64BIT 0x00000008 85 #define RX_BURST_SIZE_4_64BIT 0x00000004 86 #define PORT_SERIAL_CONTROL 0x003c 87 #define SET_MII_SPEED_TO_100 0x01000000 88 #define SET_GMII_SPEED_TO_1000 0x00800000 89 #define SET_FULL_DUPLEX_MODE 0x00200000 90 #define MAX_RX_PACKET_9700BYTE 0x000a0000 91 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000 92 #define DO_NOT_FORCE_LINK_FAIL 0x00000400 93 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200 94 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008 95 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004 96 #define FORCE_LINK_PASS 0x00000002 97 #define SERIAL_PORT_ENABLE 0x00000001 98 #define PORT_STATUS 0x0044 99 #define TX_FIFO_EMPTY 0x00000400 100 #define TX_IN_PROGRESS 0x00000080 101 #define PORT_SPEED_MASK 0x00000030 102 #define PORT_SPEED_1000 0x00000010 103 #define PORT_SPEED_100 0x00000020 104 #define PORT_SPEED_10 0x00000000 105 #define FLOW_CONTROL_ENABLED 0x00000008 106 #define FULL_DUPLEX 0x00000004 107 #define LINK_UP 0x00000002 108 #define TXQ_COMMAND 0x0048 109 #define TXQ_FIX_PRIO_CONF 0x004c 110 #define PORT_SERIAL_CONTROL1 0x004c 111 #define CLK125_BYPASS_EN 0x00000010 112 #define TX_BW_RATE 0x0050 113 #define TX_BW_MTU 0x0058 114 #define TX_BW_BURST 0x005c 115 #define INT_CAUSE 0x0060 116 #define INT_TX_END 0x07f80000 117 #define INT_TX_END_0 0x00080000 118 #define INT_RX 0x000003fc 119 #define INT_RX_0 0x00000004 120 #define INT_EXT 0x00000002 121 #define INT_CAUSE_EXT 0x0064 122 #define INT_EXT_LINK_PHY 0x00110000 123 #define INT_EXT_TX 0x000000ff 124 #define INT_MASK 0x0068 125 #define INT_MASK_EXT 0x006c 126 #define TX_FIFO_URGENT_THRESHOLD 0x0074 127 #define RX_DISCARD_FRAME_CNT 0x0084 128 #define RX_OVERRUN_FRAME_CNT 0x0088 129 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc 130 #define TX_BW_RATE_MOVED 0x00e0 131 #define TX_BW_MTU_MOVED 0x00e8 132 #define TX_BW_BURST_MOVED 0x00ec 133 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4)) 134 #define RXQ_COMMAND 0x0280 135 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2)) 136 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4)) 137 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4)) 138 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4)) 139 140 /* 141 * Misc per-port registers. 142 */ 143 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7)) 144 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10)) 145 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10)) 146 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10)) 147 148 149 /* 150 * SDMA configuration register default value. 151 */ 152 #if defined(__BIG_ENDIAN) 153 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 154 (RX_BURST_SIZE_4_64BIT | \ 155 TX_BURST_SIZE_4_64BIT) 156 #elif defined(__LITTLE_ENDIAN) 157 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 158 (RX_BURST_SIZE_4_64BIT | \ 159 BLM_RX_NO_SWAP | \ 160 BLM_TX_NO_SWAP | \ 161 TX_BURST_SIZE_4_64BIT) 162 #else 163 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 164 #endif 165 166 167 /* 168 * Misc definitions. 169 */ 170 #define DEFAULT_RX_QUEUE_SIZE 128 171 #define DEFAULT_TX_QUEUE_SIZE 512 172 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) 173 174 /* Max number of allowed TCP segments for software TSO */ 175 #define MV643XX_MAX_TSO_SEGS 100 176 #define MV643XX_MAX_SKB_DESCS (MV643XX_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 177 178 #define IS_TSO_HEADER(txq, addr) \ 179 ((addr >= txq->tso_hdrs_dma) && \ 180 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE)) 181 182 #define DESC_DMA_MAP_SINGLE 0 183 #define DESC_DMA_MAP_PAGE 1 184 185 /* 186 * RX/TX descriptors. 187 */ 188 #if defined(__BIG_ENDIAN) 189 struct rx_desc { 190 u16 byte_cnt; /* Descriptor buffer byte count */ 191 u16 buf_size; /* Buffer size */ 192 u32 cmd_sts; /* Descriptor command status */ 193 u32 next_desc_ptr; /* Next descriptor pointer */ 194 u32 buf_ptr; /* Descriptor buffer pointer */ 195 }; 196 197 struct tx_desc { 198 u16 byte_cnt; /* buffer byte count */ 199 u16 l4i_chk; /* CPU provided TCP checksum */ 200 u32 cmd_sts; /* Command/status field */ 201 u32 next_desc_ptr; /* Pointer to next descriptor */ 202 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 203 }; 204 #elif defined(__LITTLE_ENDIAN) 205 struct rx_desc { 206 u32 cmd_sts; /* Descriptor command status */ 207 u16 buf_size; /* Buffer size */ 208 u16 byte_cnt; /* Descriptor buffer byte count */ 209 u32 buf_ptr; /* Descriptor buffer pointer */ 210 u32 next_desc_ptr; /* Next descriptor pointer */ 211 }; 212 213 struct tx_desc { 214 u32 cmd_sts; /* Command/status field */ 215 u16 l4i_chk; /* CPU provided TCP checksum */ 216 u16 byte_cnt; /* buffer byte count */ 217 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 218 u32 next_desc_ptr; /* Pointer to next descriptor */ 219 }; 220 #else 221 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 222 #endif 223 224 /* RX & TX descriptor command */ 225 #define BUFFER_OWNED_BY_DMA 0x80000000 226 227 /* RX & TX descriptor status */ 228 #define ERROR_SUMMARY 0x00000001 229 230 /* RX descriptor status */ 231 #define LAYER_4_CHECKSUM_OK 0x40000000 232 #define RX_ENABLE_INTERRUPT 0x20000000 233 #define RX_FIRST_DESC 0x08000000 234 #define RX_LAST_DESC 0x04000000 235 #define RX_IP_HDR_OK 0x02000000 236 #define RX_PKT_IS_IPV4 0x01000000 237 #define RX_PKT_IS_ETHERNETV2 0x00800000 238 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000 239 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000 240 #define RX_PKT_IS_VLAN_TAGGED 0x00080000 241 242 /* TX descriptor command */ 243 #define TX_ENABLE_INTERRUPT 0x00800000 244 #define GEN_CRC 0x00400000 245 #define TX_FIRST_DESC 0x00200000 246 #define TX_LAST_DESC 0x00100000 247 #define ZERO_PADDING 0x00080000 248 #define GEN_IP_V4_CHECKSUM 0x00040000 249 #define GEN_TCP_UDP_CHECKSUM 0x00020000 250 #define UDP_FRAME 0x00010000 251 #define MAC_HDR_EXTRA_4_BYTES 0x00008000 252 #define GEN_TCP_UDP_CHK_FULL 0x00000400 253 #define MAC_HDR_EXTRA_8_BYTES 0x00000200 254 255 #define TX_IHL_SHIFT 11 256 257 258 /* global *******************************************************************/ 259 struct mv643xx_eth_shared_private { 260 /* 261 * Ethernet controller base address. 262 */ 263 void __iomem *base; 264 265 /* 266 * Per-port MBUS window access register value. 267 */ 268 u32 win_protect; 269 270 /* 271 * Hardware-specific parameters. 272 */ 273 int extended_rx_coal_limit; 274 int tx_bw_control; 275 int tx_csum_limit; 276 struct clk *clk; 277 }; 278 279 #define TX_BW_CONTROL_ABSENT 0 280 #define TX_BW_CONTROL_OLD_LAYOUT 1 281 #define TX_BW_CONTROL_NEW_LAYOUT 2 282 283 static int mv643xx_eth_open(struct net_device *dev); 284 static int mv643xx_eth_stop(struct net_device *dev); 285 286 287 /* per-port *****************************************************************/ 288 struct mib_counters { 289 u64 good_octets_received; 290 u32 bad_octets_received; 291 u32 internal_mac_transmit_err; 292 u32 good_frames_received; 293 u32 bad_frames_received; 294 u32 broadcast_frames_received; 295 u32 multicast_frames_received; 296 u32 frames_64_octets; 297 u32 frames_65_to_127_octets; 298 u32 frames_128_to_255_octets; 299 u32 frames_256_to_511_octets; 300 u32 frames_512_to_1023_octets; 301 u32 frames_1024_to_max_octets; 302 u64 good_octets_sent; 303 u32 good_frames_sent; 304 u32 excessive_collision; 305 u32 multicast_frames_sent; 306 u32 broadcast_frames_sent; 307 u32 unrec_mac_control_received; 308 u32 fc_sent; 309 u32 good_fc_received; 310 u32 bad_fc_received; 311 u32 undersize_received; 312 u32 fragments_received; 313 u32 oversize_received; 314 u32 jabber_received; 315 u32 mac_receive_error; 316 u32 bad_crc_event; 317 u32 collision; 318 u32 late_collision; 319 /* Non MIB hardware counters */ 320 u32 rx_discard; 321 u32 rx_overrun; 322 }; 323 324 struct rx_queue { 325 int index; 326 327 int rx_ring_size; 328 329 int rx_desc_count; 330 int rx_curr_desc; 331 int rx_used_desc; 332 333 struct rx_desc *rx_desc_area; 334 dma_addr_t rx_desc_dma; 335 int rx_desc_area_size; 336 struct sk_buff **rx_skb; 337 }; 338 339 struct tx_queue { 340 int index; 341 342 int tx_ring_size; 343 344 int tx_desc_count; 345 int tx_curr_desc; 346 int tx_used_desc; 347 348 int tx_stop_threshold; 349 int tx_wake_threshold; 350 351 char *tso_hdrs; 352 dma_addr_t tso_hdrs_dma; 353 354 struct tx_desc *tx_desc_area; 355 char *tx_desc_mapping; /* array to track the type of the dma mapping */ 356 dma_addr_t tx_desc_dma; 357 int tx_desc_area_size; 358 359 struct sk_buff_head tx_skb; 360 361 unsigned long tx_packets; 362 unsigned long tx_bytes; 363 unsigned long tx_dropped; 364 }; 365 366 struct mv643xx_eth_private { 367 struct mv643xx_eth_shared_private *shared; 368 void __iomem *base; 369 int port_num; 370 371 struct net_device *dev; 372 373 struct timer_list mib_counters_timer; 374 spinlock_t mib_counters_lock; 375 struct mib_counters mib_counters; 376 377 struct work_struct tx_timeout_task; 378 379 struct napi_struct napi; 380 u32 int_mask; 381 u8 oom; 382 u8 work_link; 383 u8 work_tx; 384 u8 work_tx_end; 385 u8 work_rx; 386 u8 work_rx_refill; 387 388 int skb_size; 389 390 /* 391 * RX state. 392 */ 393 int rx_ring_size; 394 unsigned long rx_desc_sram_addr; 395 int rx_desc_sram_size; 396 int rxq_count; 397 struct timer_list rx_oom; 398 struct rx_queue rxq[8]; 399 400 /* 401 * TX state. 402 */ 403 int tx_ring_size; 404 unsigned long tx_desc_sram_addr; 405 int tx_desc_sram_size; 406 int txq_count; 407 struct tx_queue txq[8]; 408 409 /* 410 * Hardware-specific parameters. 411 */ 412 struct clk *clk; 413 unsigned int t_clk; 414 }; 415 416 417 /* port register accessors **************************************************/ 418 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset) 419 { 420 return readl(mp->shared->base + offset); 421 } 422 423 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset) 424 { 425 return readl(mp->base + offset); 426 } 427 428 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data) 429 { 430 writel(data, mp->shared->base + offset); 431 } 432 433 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data) 434 { 435 writel(data, mp->base + offset); 436 } 437 438 439 /* rxq/txq helper functions *************************************************/ 440 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) 441 { 442 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]); 443 } 444 445 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) 446 { 447 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]); 448 } 449 450 static void rxq_enable(struct rx_queue *rxq) 451 { 452 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 453 wrlp(mp, RXQ_COMMAND, 1 << rxq->index); 454 } 455 456 static void rxq_disable(struct rx_queue *rxq) 457 { 458 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 459 u8 mask = 1 << rxq->index; 460 461 wrlp(mp, RXQ_COMMAND, mask << 8); 462 while (rdlp(mp, RXQ_COMMAND) & mask) 463 udelay(10); 464 } 465 466 static void txq_reset_hw_ptr(struct tx_queue *txq) 467 { 468 struct mv643xx_eth_private *mp = txq_to_mp(txq); 469 u32 addr; 470 471 addr = (u32)txq->tx_desc_dma; 472 addr += txq->tx_curr_desc * sizeof(struct tx_desc); 473 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr); 474 } 475 476 static void txq_enable(struct tx_queue *txq) 477 { 478 struct mv643xx_eth_private *mp = txq_to_mp(txq); 479 wrlp(mp, TXQ_COMMAND, 1 << txq->index); 480 } 481 482 static void txq_disable(struct tx_queue *txq) 483 { 484 struct mv643xx_eth_private *mp = txq_to_mp(txq); 485 u8 mask = 1 << txq->index; 486 487 wrlp(mp, TXQ_COMMAND, mask << 8); 488 while (rdlp(mp, TXQ_COMMAND) & mask) 489 udelay(10); 490 } 491 492 static void txq_maybe_wake(struct tx_queue *txq) 493 { 494 struct mv643xx_eth_private *mp = txq_to_mp(txq); 495 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 496 497 if (netif_tx_queue_stopped(nq)) { 498 __netif_tx_lock(nq, smp_processor_id()); 499 if (txq->tx_desc_count <= txq->tx_wake_threshold) 500 netif_tx_wake_queue(nq); 501 __netif_tx_unlock(nq); 502 } 503 } 504 505 static int rxq_process(struct rx_queue *rxq, int budget) 506 { 507 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 508 struct net_device_stats *stats = &mp->dev->stats; 509 int rx; 510 511 rx = 0; 512 while (rx < budget && rxq->rx_desc_count) { 513 struct rx_desc *rx_desc; 514 unsigned int cmd_sts; 515 struct sk_buff *skb; 516 u16 byte_cnt; 517 518 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc]; 519 520 cmd_sts = rx_desc->cmd_sts; 521 if (cmd_sts & BUFFER_OWNED_BY_DMA) 522 break; 523 rmb(); 524 525 skb = rxq->rx_skb[rxq->rx_curr_desc]; 526 rxq->rx_skb[rxq->rx_curr_desc] = NULL; 527 528 rxq->rx_curr_desc++; 529 if (rxq->rx_curr_desc == rxq->rx_ring_size) 530 rxq->rx_curr_desc = 0; 531 532 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr, 533 rx_desc->buf_size, DMA_FROM_DEVICE); 534 rxq->rx_desc_count--; 535 rx++; 536 537 mp->work_rx_refill |= 1 << rxq->index; 538 539 byte_cnt = rx_desc->byte_cnt; 540 541 /* 542 * Update statistics. 543 * 544 * Note that the descriptor byte count includes 2 dummy 545 * bytes automatically inserted by the hardware at the 546 * start of the packet (which we don't count), and a 4 547 * byte CRC at the end of the packet (which we do count). 548 */ 549 stats->rx_packets++; 550 stats->rx_bytes += byte_cnt - 2; 551 552 /* 553 * In case we received a packet without first / last bits 554 * on, or the error summary bit is set, the packet needs 555 * to be dropped. 556 */ 557 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY)) 558 != (RX_FIRST_DESC | RX_LAST_DESC)) 559 goto err; 560 561 /* 562 * The -4 is for the CRC in the trailer of the 563 * received packet 564 */ 565 skb_put(skb, byte_cnt - 2 - 4); 566 567 if (cmd_sts & LAYER_4_CHECKSUM_OK) 568 skb->ip_summed = CHECKSUM_UNNECESSARY; 569 skb->protocol = eth_type_trans(skb, mp->dev); 570 571 napi_gro_receive(&mp->napi, skb); 572 573 continue; 574 575 err: 576 stats->rx_dropped++; 577 578 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != 579 (RX_FIRST_DESC | RX_LAST_DESC)) { 580 if (net_ratelimit()) 581 netdev_err(mp->dev, 582 "received packet spanning multiple descriptors\n"); 583 } 584 585 if (cmd_sts & ERROR_SUMMARY) 586 stats->rx_errors++; 587 588 dev_kfree_skb(skb); 589 } 590 591 if (rx < budget) 592 mp->work_rx &= ~(1 << rxq->index); 593 594 return rx; 595 } 596 597 static int rxq_refill(struct rx_queue *rxq, int budget) 598 { 599 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 600 int refilled; 601 602 refilled = 0; 603 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) { 604 struct sk_buff *skb; 605 int rx; 606 struct rx_desc *rx_desc; 607 int size; 608 609 skb = netdev_alloc_skb(mp->dev, mp->skb_size); 610 611 if (skb == NULL) { 612 mp->oom = 1; 613 goto oom; 614 } 615 616 if (SKB_DMA_REALIGN) 617 skb_reserve(skb, SKB_DMA_REALIGN); 618 619 refilled++; 620 rxq->rx_desc_count++; 621 622 rx = rxq->rx_used_desc++; 623 if (rxq->rx_used_desc == rxq->rx_ring_size) 624 rxq->rx_used_desc = 0; 625 626 rx_desc = rxq->rx_desc_area + rx; 627 628 size = skb_end_pointer(skb) - skb->data; 629 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent, 630 skb->data, size, 631 DMA_FROM_DEVICE); 632 rx_desc->buf_size = size; 633 rxq->rx_skb[rx] = skb; 634 wmb(); 635 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT; 636 wmb(); 637 638 /* 639 * The hardware automatically prepends 2 bytes of 640 * dummy data to each received packet, so that the 641 * IP header ends up 16-byte aligned. 642 */ 643 skb_reserve(skb, 2); 644 } 645 646 if (refilled < budget) 647 mp->work_rx_refill &= ~(1 << rxq->index); 648 649 oom: 650 return refilled; 651 } 652 653 654 /* tx ***********************************************************************/ 655 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) 656 { 657 int frag; 658 659 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { 660 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; 661 662 if (skb_frag_size(fragp) <= 8 && skb_frag_off(fragp) & 7) 663 return 1; 664 } 665 666 return 0; 667 } 668 669 static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb, 670 u16 *l4i_chk, u32 *command, int length) 671 { 672 int ret; 673 u32 cmd = 0; 674 675 if (skb->ip_summed == CHECKSUM_PARTIAL) { 676 int hdr_len; 677 int tag_bytes; 678 679 BUG_ON(skb->protocol != htons(ETH_P_IP) && 680 skb->protocol != htons(ETH_P_8021Q)); 681 682 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data; 683 tag_bytes = hdr_len - ETH_HLEN; 684 685 if (length - hdr_len > mp->shared->tx_csum_limit || 686 unlikely(tag_bytes & ~12)) { 687 ret = skb_checksum_help(skb); 688 if (!ret) 689 goto no_csum; 690 return ret; 691 } 692 693 if (tag_bytes & 4) 694 cmd |= MAC_HDR_EXTRA_4_BYTES; 695 if (tag_bytes & 8) 696 cmd |= MAC_HDR_EXTRA_8_BYTES; 697 698 cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL | 699 GEN_IP_V4_CHECKSUM | 700 ip_hdr(skb)->ihl << TX_IHL_SHIFT; 701 702 /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL 703 * it seems we don't need to pass the initial checksum. 704 */ 705 switch (ip_hdr(skb)->protocol) { 706 case IPPROTO_UDP: 707 cmd |= UDP_FRAME; 708 *l4i_chk = 0; 709 break; 710 case IPPROTO_TCP: 711 *l4i_chk = 0; 712 break; 713 default: 714 WARN(1, "protocol not supported"); 715 } 716 } else { 717 no_csum: 718 /* Errata BTS #50, IHL must be 5 if no HW checksum */ 719 cmd |= 5 << TX_IHL_SHIFT; 720 } 721 *command = cmd; 722 return 0; 723 } 724 725 static inline int 726 txq_put_data_tso(struct net_device *dev, struct tx_queue *txq, 727 struct sk_buff *skb, char *data, int length, 728 bool last_tcp, bool is_last) 729 { 730 int tx_index; 731 u32 cmd_sts; 732 struct tx_desc *desc; 733 734 tx_index = txq->tx_curr_desc++; 735 if (txq->tx_curr_desc == txq->tx_ring_size) 736 txq->tx_curr_desc = 0; 737 desc = &txq->tx_desc_area[tx_index]; 738 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 739 740 desc->l4i_chk = 0; 741 desc->byte_cnt = length; 742 743 if (length <= 8 && (uintptr_t)data & 0x7) { 744 /* Copy unaligned small data fragment to TSO header data area */ 745 memcpy(txq->tso_hdrs + tx_index * TSO_HEADER_SIZE, 746 data, length); 747 desc->buf_ptr = txq->tso_hdrs_dma 748 + tx_index * TSO_HEADER_SIZE; 749 } else { 750 /* Alignment is okay, map buffer and hand off to hardware */ 751 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 752 desc->buf_ptr = dma_map_single(dev->dev.parent, data, 753 length, DMA_TO_DEVICE); 754 if (unlikely(dma_mapping_error(dev->dev.parent, 755 desc->buf_ptr))) { 756 WARN(1, "dma_map_single failed!\n"); 757 return -ENOMEM; 758 } 759 } 760 761 cmd_sts = BUFFER_OWNED_BY_DMA; 762 if (last_tcp) { 763 /* last descriptor in the TCP packet */ 764 cmd_sts |= ZERO_PADDING | TX_LAST_DESC; 765 /* last descriptor in SKB */ 766 if (is_last) 767 cmd_sts |= TX_ENABLE_INTERRUPT; 768 } 769 desc->cmd_sts = cmd_sts; 770 return 0; 771 } 772 773 static inline void 774 txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length, 775 u32 *first_cmd_sts, bool first_desc) 776 { 777 struct mv643xx_eth_private *mp = txq_to_mp(txq); 778 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 779 int tx_index; 780 struct tx_desc *desc; 781 int ret; 782 u32 cmd_csum = 0; 783 u16 l4i_chk = 0; 784 u32 cmd_sts; 785 786 tx_index = txq->tx_curr_desc; 787 desc = &txq->tx_desc_area[tx_index]; 788 789 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_csum, length); 790 if (ret) 791 WARN(1, "failed to prepare checksum!"); 792 793 /* Should we set this? Can't use the value from skb_tx_csum() 794 * as it's not the correct initial L4 checksum to use. 795 */ 796 desc->l4i_chk = 0; 797 798 desc->byte_cnt = hdr_len; 799 desc->buf_ptr = txq->tso_hdrs_dma + 800 txq->tx_curr_desc * TSO_HEADER_SIZE; 801 cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC | 802 GEN_CRC; 803 804 /* Defer updating the first command descriptor until all 805 * following descriptors have been written. 806 */ 807 if (first_desc) 808 *first_cmd_sts = cmd_sts; 809 else 810 desc->cmd_sts = cmd_sts; 811 812 txq->tx_curr_desc++; 813 if (txq->tx_curr_desc == txq->tx_ring_size) 814 txq->tx_curr_desc = 0; 815 } 816 817 static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb, 818 struct net_device *dev) 819 { 820 struct mv643xx_eth_private *mp = txq_to_mp(txq); 821 int hdr_len, total_len, data_left, ret; 822 int desc_count = 0; 823 struct tso_t tso; 824 struct tx_desc *first_tx_desc; 825 u32 first_cmd_sts = 0; 826 827 /* Count needed descriptors */ 828 if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) { 829 netdev_dbg(dev, "not enough descriptors for TSO!\n"); 830 return -EBUSY; 831 } 832 833 first_tx_desc = &txq->tx_desc_area[txq->tx_curr_desc]; 834 835 /* Initialize the TSO handler, and prepare the first payload */ 836 hdr_len = tso_start(skb, &tso); 837 838 total_len = skb->len - hdr_len; 839 while (total_len > 0) { 840 bool first_desc = (desc_count == 0); 841 char *hdr; 842 843 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 844 total_len -= data_left; 845 desc_count++; 846 847 /* prepare packet headers: MAC + IP + TCP */ 848 hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE; 849 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 850 txq_put_hdr_tso(skb, txq, data_left, &first_cmd_sts, 851 first_desc); 852 853 while (data_left > 0) { 854 int size; 855 desc_count++; 856 857 size = min_t(int, tso.size, data_left); 858 ret = txq_put_data_tso(dev, txq, skb, tso.data, size, 859 size == data_left, 860 total_len == 0); 861 if (ret) 862 goto err_release; 863 data_left -= size; 864 tso_build_data(skb, &tso, size); 865 } 866 } 867 868 __skb_queue_tail(&txq->tx_skb, skb); 869 skb_tx_timestamp(skb); 870 871 /* ensure all other descriptors are written before first cmd_sts */ 872 wmb(); 873 first_tx_desc->cmd_sts = first_cmd_sts; 874 875 /* clear TX_END status */ 876 mp->work_tx_end &= ~(1 << txq->index); 877 878 /* ensure all descriptors are written before poking hardware */ 879 wmb(); 880 txq_enable(txq); 881 txq->tx_desc_count += desc_count; 882 return 0; 883 err_release: 884 /* TODO: Release all used data descriptors; header descriptors must not 885 * be DMA-unmapped. 886 */ 887 return ret; 888 } 889 890 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) 891 { 892 struct mv643xx_eth_private *mp = txq_to_mp(txq); 893 int nr_frags = skb_shinfo(skb)->nr_frags; 894 int frag; 895 896 for (frag = 0; frag < nr_frags; frag++) { 897 skb_frag_t *this_frag; 898 int tx_index; 899 struct tx_desc *desc; 900 901 this_frag = &skb_shinfo(skb)->frags[frag]; 902 tx_index = txq->tx_curr_desc++; 903 if (txq->tx_curr_desc == txq->tx_ring_size) 904 txq->tx_curr_desc = 0; 905 desc = &txq->tx_desc_area[tx_index]; 906 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_PAGE; 907 908 /* 909 * The last fragment will generate an interrupt 910 * which will free the skb on TX completion. 911 */ 912 if (frag == nr_frags - 1) { 913 desc->cmd_sts = BUFFER_OWNED_BY_DMA | 914 ZERO_PADDING | TX_LAST_DESC | 915 TX_ENABLE_INTERRUPT; 916 } else { 917 desc->cmd_sts = BUFFER_OWNED_BY_DMA; 918 } 919 920 desc->l4i_chk = 0; 921 desc->byte_cnt = skb_frag_size(this_frag); 922 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent, 923 this_frag, 0, desc->byte_cnt, 924 DMA_TO_DEVICE); 925 } 926 } 927 928 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb, 929 struct net_device *dev) 930 { 931 struct mv643xx_eth_private *mp = txq_to_mp(txq); 932 int nr_frags = skb_shinfo(skb)->nr_frags; 933 int tx_index; 934 struct tx_desc *desc; 935 u32 cmd_sts; 936 u16 l4i_chk; 937 int length, ret; 938 939 cmd_sts = 0; 940 l4i_chk = 0; 941 942 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) { 943 if (net_ratelimit()) 944 netdev_err(dev, "tx queue full?!\n"); 945 return -EBUSY; 946 } 947 948 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len); 949 if (ret) 950 return ret; 951 cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; 952 953 tx_index = txq->tx_curr_desc++; 954 if (txq->tx_curr_desc == txq->tx_ring_size) 955 txq->tx_curr_desc = 0; 956 desc = &txq->tx_desc_area[tx_index]; 957 txq->tx_desc_mapping[tx_index] = DESC_DMA_MAP_SINGLE; 958 959 if (nr_frags) { 960 txq_submit_frag_skb(txq, skb); 961 length = skb_headlen(skb); 962 } else { 963 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT; 964 length = skb->len; 965 } 966 967 desc->l4i_chk = l4i_chk; 968 desc->byte_cnt = length; 969 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data, 970 length, DMA_TO_DEVICE); 971 972 __skb_queue_tail(&txq->tx_skb, skb); 973 974 skb_tx_timestamp(skb); 975 976 /* ensure all other descriptors are written before first cmd_sts */ 977 wmb(); 978 desc->cmd_sts = cmd_sts; 979 980 /* clear TX_END status */ 981 mp->work_tx_end &= ~(1 << txq->index); 982 983 /* ensure all descriptors are written before poking hardware */ 984 wmb(); 985 txq_enable(txq); 986 987 txq->tx_desc_count += nr_frags + 1; 988 989 return 0; 990 } 991 992 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev) 993 { 994 struct mv643xx_eth_private *mp = netdev_priv(dev); 995 int length, queue, ret; 996 struct tx_queue *txq; 997 struct netdev_queue *nq; 998 999 queue = skb_get_queue_mapping(skb); 1000 txq = mp->txq + queue; 1001 nq = netdev_get_tx_queue(dev, queue); 1002 1003 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { 1004 netdev_printk(KERN_DEBUG, dev, 1005 "failed to linearize skb with tiny unaligned fragment\n"); 1006 return NETDEV_TX_BUSY; 1007 } 1008 1009 length = skb->len; 1010 1011 if (skb_is_gso(skb)) 1012 ret = txq_submit_tso(txq, skb, dev); 1013 else 1014 ret = txq_submit_skb(txq, skb, dev); 1015 if (!ret) { 1016 txq->tx_bytes += length; 1017 txq->tx_packets++; 1018 1019 if (txq->tx_desc_count >= txq->tx_stop_threshold) 1020 netif_tx_stop_queue(nq); 1021 } else { 1022 txq->tx_dropped++; 1023 dev_kfree_skb_any(skb); 1024 } 1025 1026 return NETDEV_TX_OK; 1027 } 1028 1029 1030 /* tx napi ******************************************************************/ 1031 static void txq_kick(struct tx_queue *txq) 1032 { 1033 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1034 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1035 u32 hw_desc_ptr; 1036 u32 expected_ptr; 1037 1038 __netif_tx_lock(nq, smp_processor_id()); 1039 1040 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index)) 1041 goto out; 1042 1043 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index)); 1044 expected_ptr = (u32)txq->tx_desc_dma + 1045 txq->tx_curr_desc * sizeof(struct tx_desc); 1046 1047 if (hw_desc_ptr != expected_ptr) 1048 txq_enable(txq); 1049 1050 out: 1051 __netif_tx_unlock(nq); 1052 1053 mp->work_tx_end &= ~(1 << txq->index); 1054 } 1055 1056 static int txq_reclaim(struct tx_queue *txq, int budget, int force) 1057 { 1058 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1059 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1060 int reclaimed; 1061 1062 __netif_tx_lock_bh(nq); 1063 1064 reclaimed = 0; 1065 while (reclaimed < budget && txq->tx_desc_count > 0) { 1066 int tx_index; 1067 struct tx_desc *desc; 1068 u32 cmd_sts; 1069 char desc_dma_map; 1070 1071 tx_index = txq->tx_used_desc; 1072 desc = &txq->tx_desc_area[tx_index]; 1073 desc_dma_map = txq->tx_desc_mapping[tx_index]; 1074 1075 cmd_sts = desc->cmd_sts; 1076 1077 if (cmd_sts & BUFFER_OWNED_BY_DMA) { 1078 if (!force) 1079 break; 1080 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA; 1081 } 1082 1083 txq->tx_used_desc = tx_index + 1; 1084 if (txq->tx_used_desc == txq->tx_ring_size) 1085 txq->tx_used_desc = 0; 1086 1087 reclaimed++; 1088 txq->tx_desc_count--; 1089 1090 if (!IS_TSO_HEADER(txq, desc->buf_ptr)) { 1091 1092 if (desc_dma_map == DESC_DMA_MAP_PAGE) 1093 dma_unmap_page(mp->dev->dev.parent, 1094 desc->buf_ptr, 1095 desc->byte_cnt, 1096 DMA_TO_DEVICE); 1097 else 1098 dma_unmap_single(mp->dev->dev.parent, 1099 desc->buf_ptr, 1100 desc->byte_cnt, 1101 DMA_TO_DEVICE); 1102 } 1103 1104 if (cmd_sts & TX_ENABLE_INTERRUPT) { 1105 struct sk_buff *skb = __skb_dequeue(&txq->tx_skb); 1106 1107 if (!WARN_ON(!skb)) 1108 dev_consume_skb_any(skb); 1109 } 1110 1111 if (cmd_sts & ERROR_SUMMARY) { 1112 netdev_info(mp->dev, "tx error\n"); 1113 mp->dev->stats.tx_errors++; 1114 } 1115 1116 } 1117 1118 __netif_tx_unlock_bh(nq); 1119 1120 if (reclaimed < budget) 1121 mp->work_tx &= ~(1 << txq->index); 1122 1123 return reclaimed; 1124 } 1125 1126 1127 /* tx rate control **********************************************************/ 1128 /* 1129 * Set total maximum TX rate (shared by all TX queues for this port) 1130 * to 'rate' bits per second, with a maximum burst of 'burst' bytes. 1131 */ 1132 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst) 1133 { 1134 int token_rate; 1135 int mtu; 1136 int bucket_size; 1137 1138 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 1139 if (token_rate > 1023) 1140 token_rate = 1023; 1141 1142 mtu = (mp->dev->mtu + 255) >> 8; 1143 if (mtu > 63) 1144 mtu = 63; 1145 1146 bucket_size = (burst + 255) >> 8; 1147 if (bucket_size > 65535) 1148 bucket_size = 65535; 1149 1150 switch (mp->shared->tx_bw_control) { 1151 case TX_BW_CONTROL_OLD_LAYOUT: 1152 wrlp(mp, TX_BW_RATE, token_rate); 1153 wrlp(mp, TX_BW_MTU, mtu); 1154 wrlp(mp, TX_BW_BURST, bucket_size); 1155 break; 1156 case TX_BW_CONTROL_NEW_LAYOUT: 1157 wrlp(mp, TX_BW_RATE_MOVED, token_rate); 1158 wrlp(mp, TX_BW_MTU_MOVED, mtu); 1159 wrlp(mp, TX_BW_BURST_MOVED, bucket_size); 1160 break; 1161 } 1162 } 1163 1164 static void txq_set_rate(struct tx_queue *txq, int rate, int burst) 1165 { 1166 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1167 int token_rate; 1168 int bucket_size; 1169 1170 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 1171 if (token_rate > 1023) 1172 token_rate = 1023; 1173 1174 bucket_size = (burst + 255) >> 8; 1175 if (bucket_size > 65535) 1176 bucket_size = 65535; 1177 1178 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14); 1179 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate); 1180 } 1181 1182 static void txq_set_fixed_prio_mode(struct tx_queue *txq) 1183 { 1184 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1185 int off; 1186 u32 val; 1187 1188 /* 1189 * Turn on fixed priority mode. 1190 */ 1191 off = 0; 1192 switch (mp->shared->tx_bw_control) { 1193 case TX_BW_CONTROL_OLD_LAYOUT: 1194 off = TXQ_FIX_PRIO_CONF; 1195 break; 1196 case TX_BW_CONTROL_NEW_LAYOUT: 1197 off = TXQ_FIX_PRIO_CONF_MOVED; 1198 break; 1199 } 1200 1201 if (off) { 1202 val = rdlp(mp, off); 1203 val |= 1 << txq->index; 1204 wrlp(mp, off, val); 1205 } 1206 } 1207 1208 1209 /* mii management interface *************************************************/ 1210 static void mv643xx_eth_adjust_link(struct net_device *dev) 1211 { 1212 struct mv643xx_eth_private *mp = netdev_priv(dev); 1213 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 1214 u32 autoneg_disable = FORCE_LINK_PASS | 1215 DISABLE_AUTO_NEG_SPEED_GMII | 1216 DISABLE_AUTO_NEG_FOR_FLOW_CTRL | 1217 DISABLE_AUTO_NEG_FOR_DUPLEX; 1218 1219 if (dev->phydev->autoneg == AUTONEG_ENABLE) { 1220 /* enable auto negotiation */ 1221 pscr &= ~autoneg_disable; 1222 goto out_write; 1223 } 1224 1225 pscr |= autoneg_disable; 1226 1227 if (dev->phydev->speed == SPEED_1000) { 1228 /* force gigabit, half duplex not supported */ 1229 pscr |= SET_GMII_SPEED_TO_1000; 1230 pscr |= SET_FULL_DUPLEX_MODE; 1231 goto out_write; 1232 } 1233 1234 pscr &= ~SET_GMII_SPEED_TO_1000; 1235 1236 if (dev->phydev->speed == SPEED_100) 1237 pscr |= SET_MII_SPEED_TO_100; 1238 else 1239 pscr &= ~SET_MII_SPEED_TO_100; 1240 1241 if (dev->phydev->duplex == DUPLEX_FULL) 1242 pscr |= SET_FULL_DUPLEX_MODE; 1243 else 1244 pscr &= ~SET_FULL_DUPLEX_MODE; 1245 1246 out_write: 1247 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 1248 } 1249 1250 /* statistics ***************************************************************/ 1251 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) 1252 { 1253 struct mv643xx_eth_private *mp = netdev_priv(dev); 1254 struct net_device_stats *stats = &dev->stats; 1255 unsigned long tx_packets = 0; 1256 unsigned long tx_bytes = 0; 1257 unsigned long tx_dropped = 0; 1258 int i; 1259 1260 for (i = 0; i < mp->txq_count; i++) { 1261 struct tx_queue *txq = mp->txq + i; 1262 1263 tx_packets += txq->tx_packets; 1264 tx_bytes += txq->tx_bytes; 1265 tx_dropped += txq->tx_dropped; 1266 } 1267 1268 stats->tx_packets = tx_packets; 1269 stats->tx_bytes = tx_bytes; 1270 stats->tx_dropped = tx_dropped; 1271 1272 return stats; 1273 } 1274 1275 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset) 1276 { 1277 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset); 1278 } 1279 1280 static void mib_counters_clear(struct mv643xx_eth_private *mp) 1281 { 1282 int i; 1283 1284 for (i = 0; i < 0x80; i += 4) 1285 mib_read(mp, i); 1286 1287 /* Clear non MIB hw counters also */ 1288 rdlp(mp, RX_DISCARD_FRAME_CNT); 1289 rdlp(mp, RX_OVERRUN_FRAME_CNT); 1290 } 1291 1292 static void mib_counters_update(struct mv643xx_eth_private *mp) 1293 { 1294 struct mib_counters *p = &mp->mib_counters; 1295 1296 spin_lock_bh(&mp->mib_counters_lock); 1297 p->good_octets_received += mib_read(mp, 0x00); 1298 p->bad_octets_received += mib_read(mp, 0x08); 1299 p->internal_mac_transmit_err += mib_read(mp, 0x0c); 1300 p->good_frames_received += mib_read(mp, 0x10); 1301 p->bad_frames_received += mib_read(mp, 0x14); 1302 p->broadcast_frames_received += mib_read(mp, 0x18); 1303 p->multicast_frames_received += mib_read(mp, 0x1c); 1304 p->frames_64_octets += mib_read(mp, 0x20); 1305 p->frames_65_to_127_octets += mib_read(mp, 0x24); 1306 p->frames_128_to_255_octets += mib_read(mp, 0x28); 1307 p->frames_256_to_511_octets += mib_read(mp, 0x2c); 1308 p->frames_512_to_1023_octets += mib_read(mp, 0x30); 1309 p->frames_1024_to_max_octets += mib_read(mp, 0x34); 1310 p->good_octets_sent += mib_read(mp, 0x38); 1311 p->good_frames_sent += mib_read(mp, 0x40); 1312 p->excessive_collision += mib_read(mp, 0x44); 1313 p->multicast_frames_sent += mib_read(mp, 0x48); 1314 p->broadcast_frames_sent += mib_read(mp, 0x4c); 1315 p->unrec_mac_control_received += mib_read(mp, 0x50); 1316 p->fc_sent += mib_read(mp, 0x54); 1317 p->good_fc_received += mib_read(mp, 0x58); 1318 p->bad_fc_received += mib_read(mp, 0x5c); 1319 p->undersize_received += mib_read(mp, 0x60); 1320 p->fragments_received += mib_read(mp, 0x64); 1321 p->oversize_received += mib_read(mp, 0x68); 1322 p->jabber_received += mib_read(mp, 0x6c); 1323 p->mac_receive_error += mib_read(mp, 0x70); 1324 p->bad_crc_event += mib_read(mp, 0x74); 1325 p->collision += mib_read(mp, 0x78); 1326 p->late_collision += mib_read(mp, 0x7c); 1327 /* Non MIB hardware counters */ 1328 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT); 1329 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT); 1330 spin_unlock_bh(&mp->mib_counters_lock); 1331 } 1332 1333 static void mib_counters_timer_wrapper(struct timer_list *t) 1334 { 1335 struct mv643xx_eth_private *mp = from_timer(mp, t, mib_counters_timer); 1336 mib_counters_update(mp); 1337 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); 1338 } 1339 1340 1341 /* interrupt coalescing *****************************************************/ 1342 /* 1343 * Hardware coalescing parameters are set in units of 64 t_clk 1344 * cycles. I.e.: 1345 * 1346 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate 1347 * 1348 * register_value = coal_delay_in_usec * t_clk_rate / 64000000 1349 * 1350 * In the ->set*() methods, we round the computed register value 1351 * to the nearest integer. 1352 */ 1353 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp) 1354 { 1355 u32 val = rdlp(mp, SDMA_CONFIG); 1356 u64 temp; 1357 1358 if (mp->shared->extended_rx_coal_limit) 1359 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7); 1360 else 1361 temp = (val & 0x003fff00) >> 8; 1362 1363 temp *= 64000000; 1364 temp += mp->t_clk / 2; 1365 do_div(temp, mp->t_clk); 1366 1367 return (unsigned int)temp; 1368 } 1369 1370 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1371 { 1372 u64 temp; 1373 u32 val; 1374 1375 temp = (u64)usec * mp->t_clk; 1376 temp += 31999999; 1377 do_div(temp, 64000000); 1378 1379 val = rdlp(mp, SDMA_CONFIG); 1380 if (mp->shared->extended_rx_coal_limit) { 1381 if (temp > 0xffff) 1382 temp = 0xffff; 1383 val &= ~0x023fff80; 1384 val |= (temp & 0x8000) << 10; 1385 val |= (temp & 0x7fff) << 7; 1386 } else { 1387 if (temp > 0x3fff) 1388 temp = 0x3fff; 1389 val &= ~0x003fff00; 1390 val |= (temp & 0x3fff) << 8; 1391 } 1392 wrlp(mp, SDMA_CONFIG, val); 1393 } 1394 1395 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) 1396 { 1397 u64 temp; 1398 1399 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; 1400 temp *= 64000000; 1401 temp += mp->t_clk / 2; 1402 do_div(temp, mp->t_clk); 1403 1404 return (unsigned int)temp; 1405 } 1406 1407 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1408 { 1409 u64 temp; 1410 1411 temp = (u64)usec * mp->t_clk; 1412 temp += 31999999; 1413 do_div(temp, 64000000); 1414 1415 if (temp > 0x3fff) 1416 temp = 0x3fff; 1417 1418 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); 1419 } 1420 1421 1422 /* ethtool ******************************************************************/ 1423 struct mv643xx_eth_stats { 1424 char stat_string[ETH_GSTRING_LEN]; 1425 int sizeof_stat; 1426 int netdev_off; 1427 int mp_off; 1428 }; 1429 1430 #define SSTAT(m) \ 1431 { #m, sizeof_field(struct net_device_stats, m), \ 1432 offsetof(struct net_device, stats.m), -1 } 1433 1434 #define MIBSTAT(m) \ 1435 { #m, sizeof_field(struct mib_counters, m), \ 1436 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } 1437 1438 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = { 1439 SSTAT(rx_packets), 1440 SSTAT(tx_packets), 1441 SSTAT(rx_bytes), 1442 SSTAT(tx_bytes), 1443 SSTAT(rx_errors), 1444 SSTAT(tx_errors), 1445 SSTAT(rx_dropped), 1446 SSTAT(tx_dropped), 1447 MIBSTAT(good_octets_received), 1448 MIBSTAT(bad_octets_received), 1449 MIBSTAT(internal_mac_transmit_err), 1450 MIBSTAT(good_frames_received), 1451 MIBSTAT(bad_frames_received), 1452 MIBSTAT(broadcast_frames_received), 1453 MIBSTAT(multicast_frames_received), 1454 MIBSTAT(frames_64_octets), 1455 MIBSTAT(frames_65_to_127_octets), 1456 MIBSTAT(frames_128_to_255_octets), 1457 MIBSTAT(frames_256_to_511_octets), 1458 MIBSTAT(frames_512_to_1023_octets), 1459 MIBSTAT(frames_1024_to_max_octets), 1460 MIBSTAT(good_octets_sent), 1461 MIBSTAT(good_frames_sent), 1462 MIBSTAT(excessive_collision), 1463 MIBSTAT(multicast_frames_sent), 1464 MIBSTAT(broadcast_frames_sent), 1465 MIBSTAT(unrec_mac_control_received), 1466 MIBSTAT(fc_sent), 1467 MIBSTAT(good_fc_received), 1468 MIBSTAT(bad_fc_received), 1469 MIBSTAT(undersize_received), 1470 MIBSTAT(fragments_received), 1471 MIBSTAT(oversize_received), 1472 MIBSTAT(jabber_received), 1473 MIBSTAT(mac_receive_error), 1474 MIBSTAT(bad_crc_event), 1475 MIBSTAT(collision), 1476 MIBSTAT(late_collision), 1477 MIBSTAT(rx_discard), 1478 MIBSTAT(rx_overrun), 1479 }; 1480 1481 static int 1482 mv643xx_eth_get_link_ksettings_phy(struct mv643xx_eth_private *mp, 1483 struct ethtool_link_ksettings *cmd) 1484 { 1485 struct net_device *dev = mp->dev; 1486 1487 phy_ethtool_ksettings_get(dev->phydev, cmd); 1488 1489 /* 1490 * The MAC does not support 1000baseT_Half. 1491 */ 1492 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1493 cmd->link_modes.supported); 1494 linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, 1495 cmd->link_modes.advertising); 1496 1497 return 0; 1498 } 1499 1500 static int 1501 mv643xx_eth_get_link_ksettings_phyless(struct mv643xx_eth_private *mp, 1502 struct ethtool_link_ksettings *cmd) 1503 { 1504 u32 port_status; 1505 u32 supported, advertising; 1506 1507 port_status = rdlp(mp, PORT_STATUS); 1508 1509 supported = SUPPORTED_MII; 1510 advertising = ADVERTISED_MII; 1511 switch (port_status & PORT_SPEED_MASK) { 1512 case PORT_SPEED_10: 1513 cmd->base.speed = SPEED_10; 1514 break; 1515 case PORT_SPEED_100: 1516 cmd->base.speed = SPEED_100; 1517 break; 1518 case PORT_SPEED_1000: 1519 cmd->base.speed = SPEED_1000; 1520 break; 1521 default: 1522 cmd->base.speed = -1; 1523 break; 1524 } 1525 cmd->base.duplex = (port_status & FULL_DUPLEX) ? 1526 DUPLEX_FULL : DUPLEX_HALF; 1527 cmd->base.port = PORT_MII; 1528 cmd->base.phy_address = 0; 1529 cmd->base.autoneg = AUTONEG_DISABLE; 1530 1531 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1532 supported); 1533 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1534 advertising); 1535 1536 return 0; 1537 } 1538 1539 static void 1540 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1541 { 1542 wol->supported = 0; 1543 wol->wolopts = 0; 1544 if (dev->phydev) 1545 phy_ethtool_get_wol(dev->phydev, wol); 1546 } 1547 1548 static int 1549 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1550 { 1551 int err; 1552 1553 if (!dev->phydev) 1554 return -EOPNOTSUPP; 1555 1556 err = phy_ethtool_set_wol(dev->phydev, wol); 1557 /* Given that mv643xx_eth works without the marvell-specific PHY driver, 1558 * this debugging hint is useful to have. 1559 */ 1560 if (err == -EOPNOTSUPP) 1561 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n"); 1562 return err; 1563 } 1564 1565 static int 1566 mv643xx_eth_get_link_ksettings(struct net_device *dev, 1567 struct ethtool_link_ksettings *cmd) 1568 { 1569 struct mv643xx_eth_private *mp = netdev_priv(dev); 1570 1571 if (dev->phydev) 1572 return mv643xx_eth_get_link_ksettings_phy(mp, cmd); 1573 else 1574 return mv643xx_eth_get_link_ksettings_phyless(mp, cmd); 1575 } 1576 1577 static int 1578 mv643xx_eth_set_link_ksettings(struct net_device *dev, 1579 const struct ethtool_link_ksettings *cmd) 1580 { 1581 struct ethtool_link_ksettings c = *cmd; 1582 u32 advertising; 1583 int ret; 1584 1585 if (!dev->phydev) 1586 return -EINVAL; 1587 1588 /* 1589 * The MAC does not support 1000baseT_Half. 1590 */ 1591 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1592 c.link_modes.advertising); 1593 advertising &= ~ADVERTISED_1000baseT_Half; 1594 ethtool_convert_legacy_u32_to_link_mode(c.link_modes.advertising, 1595 advertising); 1596 1597 ret = phy_ethtool_ksettings_set(dev->phydev, &c); 1598 if (!ret) 1599 mv643xx_eth_adjust_link(dev); 1600 return ret; 1601 } 1602 1603 static void mv643xx_eth_get_drvinfo(struct net_device *dev, 1604 struct ethtool_drvinfo *drvinfo) 1605 { 1606 strlcpy(drvinfo->driver, mv643xx_eth_driver_name, 1607 sizeof(drvinfo->driver)); 1608 strlcpy(drvinfo->version, mv643xx_eth_driver_version, 1609 sizeof(drvinfo->version)); 1610 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 1611 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 1612 } 1613 1614 static int mv643xx_eth_get_coalesce(struct net_device *dev, 1615 struct ethtool_coalesce *ec, 1616 struct kernel_ethtool_coalesce *kernel_coal, 1617 struct netlink_ext_ack *extack) 1618 { 1619 struct mv643xx_eth_private *mp = netdev_priv(dev); 1620 1621 ec->rx_coalesce_usecs = get_rx_coal(mp); 1622 ec->tx_coalesce_usecs = get_tx_coal(mp); 1623 1624 return 0; 1625 } 1626 1627 static int mv643xx_eth_set_coalesce(struct net_device *dev, 1628 struct ethtool_coalesce *ec, 1629 struct kernel_ethtool_coalesce *kernel_coal, 1630 struct netlink_ext_ack *extack) 1631 { 1632 struct mv643xx_eth_private *mp = netdev_priv(dev); 1633 1634 set_rx_coal(mp, ec->rx_coalesce_usecs); 1635 set_tx_coal(mp, ec->tx_coalesce_usecs); 1636 1637 return 0; 1638 } 1639 1640 static void 1641 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er, 1642 struct kernel_ethtool_ringparam *kernel_er, 1643 struct netlink_ext_ack *extack) 1644 { 1645 struct mv643xx_eth_private *mp = netdev_priv(dev); 1646 1647 er->rx_max_pending = 4096; 1648 er->tx_max_pending = 4096; 1649 1650 er->rx_pending = mp->rx_ring_size; 1651 er->tx_pending = mp->tx_ring_size; 1652 } 1653 1654 static int 1655 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er, 1656 struct kernel_ethtool_ringparam *kernel_er, 1657 struct netlink_ext_ack *extack) 1658 { 1659 struct mv643xx_eth_private *mp = netdev_priv(dev); 1660 1661 if (er->rx_mini_pending || er->rx_jumbo_pending) 1662 return -EINVAL; 1663 1664 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096; 1665 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending, 1666 MV643XX_MAX_SKB_DESCS * 2, 4096); 1667 if (mp->tx_ring_size != er->tx_pending) 1668 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 1669 mp->tx_ring_size, er->tx_pending); 1670 1671 if (netif_running(dev)) { 1672 mv643xx_eth_stop(dev); 1673 if (mv643xx_eth_open(dev)) { 1674 netdev_err(dev, 1675 "fatal error on re-opening device after ring param change\n"); 1676 return -ENOMEM; 1677 } 1678 } 1679 1680 return 0; 1681 } 1682 1683 1684 static int 1685 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) 1686 { 1687 struct mv643xx_eth_private *mp = netdev_priv(dev); 1688 bool rx_csum = features & NETIF_F_RXCSUM; 1689 1690 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); 1691 1692 return 0; 1693 } 1694 1695 static void mv643xx_eth_get_strings(struct net_device *dev, 1696 uint32_t stringset, uint8_t *data) 1697 { 1698 int i; 1699 1700 if (stringset == ETH_SS_STATS) { 1701 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1702 memcpy(data + i * ETH_GSTRING_LEN, 1703 mv643xx_eth_stats[i].stat_string, 1704 ETH_GSTRING_LEN); 1705 } 1706 } 1707 } 1708 1709 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, 1710 struct ethtool_stats *stats, 1711 uint64_t *data) 1712 { 1713 struct mv643xx_eth_private *mp = netdev_priv(dev); 1714 int i; 1715 1716 mv643xx_eth_get_stats(dev); 1717 mib_counters_update(mp); 1718 1719 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1720 const struct mv643xx_eth_stats *stat; 1721 void *p; 1722 1723 stat = mv643xx_eth_stats + i; 1724 1725 if (stat->netdev_off >= 0) 1726 p = ((void *)mp->dev) + stat->netdev_off; 1727 else 1728 p = ((void *)mp) + stat->mp_off; 1729 1730 data[i] = (stat->sizeof_stat == 8) ? 1731 *(uint64_t *)p : *(uint32_t *)p; 1732 } 1733 } 1734 1735 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset) 1736 { 1737 if (sset == ETH_SS_STATS) 1738 return ARRAY_SIZE(mv643xx_eth_stats); 1739 1740 return -EOPNOTSUPP; 1741 } 1742 1743 static const struct ethtool_ops mv643xx_eth_ethtool_ops = { 1744 .supported_coalesce_params = ETHTOOL_COALESCE_USECS, 1745 .get_drvinfo = mv643xx_eth_get_drvinfo, 1746 .nway_reset = phy_ethtool_nway_reset, 1747 .get_link = ethtool_op_get_link, 1748 .get_coalesce = mv643xx_eth_get_coalesce, 1749 .set_coalesce = mv643xx_eth_set_coalesce, 1750 .get_ringparam = mv643xx_eth_get_ringparam, 1751 .set_ringparam = mv643xx_eth_set_ringparam, 1752 .get_strings = mv643xx_eth_get_strings, 1753 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, 1754 .get_sset_count = mv643xx_eth_get_sset_count, 1755 .get_ts_info = ethtool_op_get_ts_info, 1756 .get_wol = mv643xx_eth_get_wol, 1757 .set_wol = mv643xx_eth_set_wol, 1758 .get_link_ksettings = mv643xx_eth_get_link_ksettings, 1759 .set_link_ksettings = mv643xx_eth_set_link_ksettings, 1760 }; 1761 1762 1763 /* address handling *********************************************************/ 1764 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr) 1765 { 1766 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH); 1767 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW); 1768 1769 addr[0] = (mac_h >> 24) & 0xff; 1770 addr[1] = (mac_h >> 16) & 0xff; 1771 addr[2] = (mac_h >> 8) & 0xff; 1772 addr[3] = mac_h & 0xff; 1773 addr[4] = (mac_l >> 8) & 0xff; 1774 addr[5] = mac_l & 0xff; 1775 } 1776 1777 static void uc_addr_set(struct mv643xx_eth_private *mp, const u8 *addr) 1778 { 1779 wrlp(mp, MAC_ADDR_HIGH, 1780 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); 1781 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]); 1782 } 1783 1784 static u32 uc_addr_filter_mask(struct net_device *dev) 1785 { 1786 struct netdev_hw_addr *ha; 1787 u32 nibbles; 1788 1789 if (dev->flags & IFF_PROMISC) 1790 return 0; 1791 1792 nibbles = 1 << (dev->dev_addr[5] & 0x0f); 1793 netdev_for_each_uc_addr(ha, dev) { 1794 if (memcmp(dev->dev_addr, ha->addr, 5)) 1795 return 0; 1796 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) 1797 return 0; 1798 1799 nibbles |= 1 << (ha->addr[5] & 0x0f); 1800 } 1801 1802 return nibbles; 1803 } 1804 1805 static void mv643xx_eth_program_unicast_filter(struct net_device *dev) 1806 { 1807 struct mv643xx_eth_private *mp = netdev_priv(dev); 1808 u32 port_config; 1809 u32 nibbles; 1810 int i; 1811 1812 uc_addr_set(mp, dev->dev_addr); 1813 1814 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; 1815 1816 nibbles = uc_addr_filter_mask(dev); 1817 if (!nibbles) { 1818 port_config |= UNICAST_PROMISCUOUS_MODE; 1819 nibbles = 0xffff; 1820 } 1821 1822 for (i = 0; i < 16; i += 4) { 1823 int off = UNICAST_TABLE(mp->port_num) + i; 1824 u32 v; 1825 1826 v = 0; 1827 if (nibbles & 1) 1828 v |= 0x00000001; 1829 if (nibbles & 2) 1830 v |= 0x00000100; 1831 if (nibbles & 4) 1832 v |= 0x00010000; 1833 if (nibbles & 8) 1834 v |= 0x01000000; 1835 nibbles >>= 4; 1836 1837 wrl(mp, off, v); 1838 } 1839 1840 wrlp(mp, PORT_CONFIG, port_config); 1841 } 1842 1843 static int addr_crc(unsigned char *addr) 1844 { 1845 int crc = 0; 1846 int i; 1847 1848 for (i = 0; i < 6; i++) { 1849 int j; 1850 1851 crc = (crc ^ addr[i]) << 8; 1852 for (j = 7; j >= 0; j--) { 1853 if (crc & (0x100 << j)) 1854 crc ^= 0x107 << j; 1855 } 1856 } 1857 1858 return crc; 1859 } 1860 1861 static void mv643xx_eth_program_multicast_filter(struct net_device *dev) 1862 { 1863 struct mv643xx_eth_private *mp = netdev_priv(dev); 1864 u32 *mc_spec; 1865 u32 *mc_other; 1866 struct netdev_hw_addr *ha; 1867 int i; 1868 1869 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) 1870 goto promiscuous; 1871 1872 /* Allocate both mc_spec and mc_other tables */ 1873 mc_spec = kcalloc(128, sizeof(u32), GFP_ATOMIC); 1874 if (!mc_spec) 1875 goto promiscuous; 1876 mc_other = &mc_spec[64]; 1877 1878 netdev_for_each_mc_addr(ha, dev) { 1879 u8 *a = ha->addr; 1880 u32 *table; 1881 u8 entry; 1882 1883 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { 1884 table = mc_spec; 1885 entry = a[5]; 1886 } else { 1887 table = mc_other; 1888 entry = addr_crc(a); 1889 } 1890 1891 table[entry >> 2] |= 1 << (8 * (entry & 3)); 1892 } 1893 1894 for (i = 0; i < 64; i++) { 1895 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1896 mc_spec[i]); 1897 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1898 mc_other[i]); 1899 } 1900 1901 kfree(mc_spec); 1902 return; 1903 1904 promiscuous: 1905 for (i = 0; i < 64; i++) { 1906 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1907 0x01010101u); 1908 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i * sizeof(u32), 1909 0x01010101u); 1910 } 1911 } 1912 1913 static void mv643xx_eth_set_rx_mode(struct net_device *dev) 1914 { 1915 mv643xx_eth_program_unicast_filter(dev); 1916 mv643xx_eth_program_multicast_filter(dev); 1917 } 1918 1919 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) 1920 { 1921 struct sockaddr *sa = addr; 1922 1923 if (!is_valid_ether_addr(sa->sa_data)) 1924 return -EADDRNOTAVAIL; 1925 1926 eth_hw_addr_set(dev, sa->sa_data); 1927 1928 netif_addr_lock_bh(dev); 1929 mv643xx_eth_program_unicast_filter(dev); 1930 netif_addr_unlock_bh(dev); 1931 1932 return 0; 1933 } 1934 1935 1936 /* rx/tx queue initialisation ***********************************************/ 1937 static int rxq_init(struct mv643xx_eth_private *mp, int index) 1938 { 1939 struct rx_queue *rxq = mp->rxq + index; 1940 struct rx_desc *rx_desc; 1941 int size; 1942 int i; 1943 1944 rxq->index = index; 1945 1946 rxq->rx_ring_size = mp->rx_ring_size; 1947 1948 rxq->rx_desc_count = 0; 1949 rxq->rx_curr_desc = 0; 1950 rxq->rx_used_desc = 0; 1951 1952 size = rxq->rx_ring_size * sizeof(struct rx_desc); 1953 1954 if (index == 0 && size <= mp->rx_desc_sram_size) { 1955 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr, 1956 mp->rx_desc_sram_size); 1957 rxq->rx_desc_dma = mp->rx_desc_sram_addr; 1958 } else { 1959 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1960 size, &rxq->rx_desc_dma, 1961 GFP_KERNEL); 1962 } 1963 1964 if (rxq->rx_desc_area == NULL) { 1965 netdev_err(mp->dev, 1966 "can't allocate rx ring (%d bytes)\n", size); 1967 goto out; 1968 } 1969 memset(rxq->rx_desc_area, 0, size); 1970 1971 rxq->rx_desc_area_size = size; 1972 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb), 1973 GFP_KERNEL); 1974 if (rxq->rx_skb == NULL) 1975 goto out_free; 1976 1977 rx_desc = rxq->rx_desc_area; 1978 for (i = 0; i < rxq->rx_ring_size; i++) { 1979 int nexti; 1980 1981 nexti = i + 1; 1982 if (nexti == rxq->rx_ring_size) 1983 nexti = 0; 1984 1985 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma + 1986 nexti * sizeof(struct rx_desc); 1987 } 1988 1989 return 0; 1990 1991 1992 out_free: 1993 if (index == 0 && size <= mp->rx_desc_sram_size) 1994 iounmap(rxq->rx_desc_area); 1995 else 1996 dma_free_coherent(mp->dev->dev.parent, size, 1997 rxq->rx_desc_area, 1998 rxq->rx_desc_dma); 1999 2000 out: 2001 return -ENOMEM; 2002 } 2003 2004 static void rxq_deinit(struct rx_queue *rxq) 2005 { 2006 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 2007 int i; 2008 2009 rxq_disable(rxq); 2010 2011 for (i = 0; i < rxq->rx_ring_size; i++) { 2012 if (rxq->rx_skb[i]) { 2013 dev_consume_skb_any(rxq->rx_skb[i]); 2014 rxq->rx_desc_count--; 2015 } 2016 } 2017 2018 if (rxq->rx_desc_count) { 2019 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n", 2020 rxq->rx_desc_count); 2021 } 2022 2023 if (rxq->index == 0 && 2024 rxq->rx_desc_area_size <= mp->rx_desc_sram_size) 2025 iounmap(rxq->rx_desc_area); 2026 else 2027 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, 2028 rxq->rx_desc_area, rxq->rx_desc_dma); 2029 2030 kfree(rxq->rx_skb); 2031 } 2032 2033 static int txq_init(struct mv643xx_eth_private *mp, int index) 2034 { 2035 struct tx_queue *txq = mp->txq + index; 2036 struct tx_desc *tx_desc; 2037 int size; 2038 int ret; 2039 int i; 2040 2041 txq->index = index; 2042 2043 txq->tx_ring_size = mp->tx_ring_size; 2044 2045 /* A queue must always have room for at least one skb. 2046 * Therefore, stop the queue when the free entries reaches 2047 * the maximum number of descriptors per skb. 2048 */ 2049 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS; 2050 txq->tx_wake_threshold = txq->tx_stop_threshold / 2; 2051 2052 txq->tx_desc_count = 0; 2053 txq->tx_curr_desc = 0; 2054 txq->tx_used_desc = 0; 2055 2056 size = txq->tx_ring_size * sizeof(struct tx_desc); 2057 2058 if (index == 0 && size <= mp->tx_desc_sram_size) { 2059 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, 2060 mp->tx_desc_sram_size); 2061 txq->tx_desc_dma = mp->tx_desc_sram_addr; 2062 } else { 2063 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 2064 size, &txq->tx_desc_dma, 2065 GFP_KERNEL); 2066 } 2067 2068 if (txq->tx_desc_area == NULL) { 2069 netdev_err(mp->dev, 2070 "can't allocate tx ring (%d bytes)\n", size); 2071 return -ENOMEM; 2072 } 2073 memset(txq->tx_desc_area, 0, size); 2074 2075 txq->tx_desc_area_size = size; 2076 2077 tx_desc = txq->tx_desc_area; 2078 for (i = 0; i < txq->tx_ring_size; i++) { 2079 struct tx_desc *txd = tx_desc + i; 2080 int nexti; 2081 2082 nexti = i + 1; 2083 if (nexti == txq->tx_ring_size) 2084 nexti = 0; 2085 2086 txd->cmd_sts = 0; 2087 txd->next_desc_ptr = txq->tx_desc_dma + 2088 nexti * sizeof(struct tx_desc); 2089 } 2090 2091 txq->tx_desc_mapping = kcalloc(txq->tx_ring_size, sizeof(char), 2092 GFP_KERNEL); 2093 if (!txq->tx_desc_mapping) { 2094 ret = -ENOMEM; 2095 goto err_free_desc_area; 2096 } 2097 2098 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ 2099 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent, 2100 txq->tx_ring_size * TSO_HEADER_SIZE, 2101 &txq->tso_hdrs_dma, GFP_KERNEL); 2102 if (txq->tso_hdrs == NULL) { 2103 ret = -ENOMEM; 2104 goto err_free_desc_mapping; 2105 } 2106 skb_queue_head_init(&txq->tx_skb); 2107 2108 return 0; 2109 2110 err_free_desc_mapping: 2111 kfree(txq->tx_desc_mapping); 2112 err_free_desc_area: 2113 if (index == 0 && size <= mp->tx_desc_sram_size) 2114 iounmap(txq->tx_desc_area); 2115 else 2116 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2117 txq->tx_desc_area, txq->tx_desc_dma); 2118 return ret; 2119 } 2120 2121 static void txq_deinit(struct tx_queue *txq) 2122 { 2123 struct mv643xx_eth_private *mp = txq_to_mp(txq); 2124 2125 txq_disable(txq); 2126 txq_reclaim(txq, txq->tx_ring_size, 1); 2127 2128 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); 2129 2130 if (txq->index == 0 && 2131 txq->tx_desc_area_size <= mp->tx_desc_sram_size) 2132 iounmap(txq->tx_desc_area); 2133 else 2134 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2135 txq->tx_desc_area, txq->tx_desc_dma); 2136 kfree(txq->tx_desc_mapping); 2137 2138 if (txq->tso_hdrs) 2139 dma_free_coherent(mp->dev->dev.parent, 2140 txq->tx_ring_size * TSO_HEADER_SIZE, 2141 txq->tso_hdrs, txq->tso_hdrs_dma); 2142 } 2143 2144 2145 /* netdev ops and related ***************************************************/ 2146 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) 2147 { 2148 u32 int_cause; 2149 u32 int_cause_ext; 2150 2151 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; 2152 if (int_cause == 0) 2153 return 0; 2154 2155 int_cause_ext = 0; 2156 if (int_cause & INT_EXT) { 2157 int_cause &= ~INT_EXT; 2158 int_cause_ext = rdlp(mp, INT_CAUSE_EXT); 2159 } 2160 2161 if (int_cause) { 2162 wrlp(mp, INT_CAUSE, ~int_cause); 2163 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & 2164 ~(rdlp(mp, TXQ_COMMAND) & 0xff); 2165 mp->work_rx |= (int_cause & INT_RX) >> 2; 2166 } 2167 2168 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; 2169 if (int_cause_ext) { 2170 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); 2171 if (int_cause_ext & INT_EXT_LINK_PHY) 2172 mp->work_link = 1; 2173 mp->work_tx |= int_cause_ext & INT_EXT_TX; 2174 } 2175 2176 return 1; 2177 } 2178 2179 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) 2180 { 2181 struct net_device *dev = (struct net_device *)dev_id; 2182 struct mv643xx_eth_private *mp = netdev_priv(dev); 2183 2184 if (unlikely(!mv643xx_eth_collect_events(mp))) 2185 return IRQ_NONE; 2186 2187 wrlp(mp, INT_MASK, 0); 2188 napi_schedule(&mp->napi); 2189 2190 return IRQ_HANDLED; 2191 } 2192 2193 static void handle_link_event(struct mv643xx_eth_private *mp) 2194 { 2195 struct net_device *dev = mp->dev; 2196 u32 port_status; 2197 int speed; 2198 int duplex; 2199 int fc; 2200 2201 port_status = rdlp(mp, PORT_STATUS); 2202 if (!(port_status & LINK_UP)) { 2203 if (netif_carrier_ok(dev)) { 2204 int i; 2205 2206 netdev_info(dev, "link down\n"); 2207 2208 netif_carrier_off(dev); 2209 2210 for (i = 0; i < mp->txq_count; i++) { 2211 struct tx_queue *txq = mp->txq + i; 2212 2213 txq_reclaim(txq, txq->tx_ring_size, 1); 2214 txq_reset_hw_ptr(txq); 2215 } 2216 } 2217 return; 2218 } 2219 2220 switch (port_status & PORT_SPEED_MASK) { 2221 case PORT_SPEED_10: 2222 speed = 10; 2223 break; 2224 case PORT_SPEED_100: 2225 speed = 100; 2226 break; 2227 case PORT_SPEED_1000: 2228 speed = 1000; 2229 break; 2230 default: 2231 speed = -1; 2232 break; 2233 } 2234 duplex = (port_status & FULL_DUPLEX) ? 1 : 0; 2235 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; 2236 2237 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n", 2238 speed, duplex ? "full" : "half", fc ? "en" : "dis"); 2239 2240 if (!netif_carrier_ok(dev)) 2241 netif_carrier_on(dev); 2242 } 2243 2244 static int mv643xx_eth_poll(struct napi_struct *napi, int budget) 2245 { 2246 struct mv643xx_eth_private *mp; 2247 int work_done; 2248 2249 mp = container_of(napi, struct mv643xx_eth_private, napi); 2250 2251 if (unlikely(mp->oom)) { 2252 mp->oom = 0; 2253 del_timer(&mp->rx_oom); 2254 } 2255 2256 work_done = 0; 2257 while (work_done < budget) { 2258 u8 queue_mask; 2259 int queue; 2260 int work_tbd; 2261 2262 if (mp->work_link) { 2263 mp->work_link = 0; 2264 handle_link_event(mp); 2265 work_done++; 2266 continue; 2267 } 2268 2269 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; 2270 if (likely(!mp->oom)) 2271 queue_mask |= mp->work_rx_refill; 2272 2273 if (!queue_mask) { 2274 if (mv643xx_eth_collect_events(mp)) 2275 continue; 2276 break; 2277 } 2278 2279 queue = fls(queue_mask) - 1; 2280 queue_mask = 1 << queue; 2281 2282 work_tbd = budget - work_done; 2283 if (work_tbd > 16) 2284 work_tbd = 16; 2285 2286 if (mp->work_tx_end & queue_mask) { 2287 txq_kick(mp->txq + queue); 2288 } else if (mp->work_tx & queue_mask) { 2289 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); 2290 txq_maybe_wake(mp->txq + queue); 2291 } else if (mp->work_rx & queue_mask) { 2292 work_done += rxq_process(mp->rxq + queue, work_tbd); 2293 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { 2294 work_done += rxq_refill(mp->rxq + queue, work_tbd); 2295 } else { 2296 BUG(); 2297 } 2298 } 2299 2300 if (work_done < budget) { 2301 if (mp->oom) 2302 mod_timer(&mp->rx_oom, jiffies + (HZ / 10)); 2303 napi_complete_done(napi, work_done); 2304 wrlp(mp, INT_MASK, mp->int_mask); 2305 } 2306 2307 return work_done; 2308 } 2309 2310 static inline void oom_timer_wrapper(struct timer_list *t) 2311 { 2312 struct mv643xx_eth_private *mp = from_timer(mp, t, rx_oom); 2313 2314 napi_schedule(&mp->napi); 2315 } 2316 2317 static void port_start(struct mv643xx_eth_private *mp) 2318 { 2319 struct net_device *dev = mp->dev; 2320 u32 pscr; 2321 int i; 2322 2323 /* 2324 * Perform PHY reset, if there is a PHY. 2325 */ 2326 if (dev->phydev) { 2327 struct ethtool_link_ksettings cmd; 2328 2329 mv643xx_eth_get_link_ksettings(dev, &cmd); 2330 phy_init_hw(dev->phydev); 2331 mv643xx_eth_set_link_ksettings( 2332 dev, (const struct ethtool_link_ksettings *)&cmd); 2333 phy_start(dev->phydev); 2334 } 2335 2336 /* 2337 * Configure basic link parameters. 2338 */ 2339 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2340 2341 pscr |= SERIAL_PORT_ENABLE; 2342 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2343 2344 pscr |= DO_NOT_FORCE_LINK_FAIL; 2345 if (!dev->phydev) 2346 pscr |= FORCE_LINK_PASS; 2347 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2348 2349 /* 2350 * Configure TX path and queues. 2351 */ 2352 tx_set_rate(mp, 1000000000, 16777216); 2353 for (i = 0; i < mp->txq_count; i++) { 2354 struct tx_queue *txq = mp->txq + i; 2355 2356 txq_reset_hw_ptr(txq); 2357 txq_set_rate(txq, 1000000000, 16777216); 2358 txq_set_fixed_prio_mode(txq); 2359 } 2360 2361 /* 2362 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast 2363 * frames to RX queue #0, and include the pseudo-header when 2364 * calculating receive checksums. 2365 */ 2366 mv643xx_eth_set_features(mp->dev, mp->dev->features); 2367 2368 /* 2369 * Treat BPDUs as normal multicasts, and disable partition mode. 2370 */ 2371 wrlp(mp, PORT_CONFIG_EXT, 0x00000000); 2372 2373 /* 2374 * Add configured unicast addresses to address filter table. 2375 */ 2376 mv643xx_eth_program_unicast_filter(mp->dev); 2377 2378 /* 2379 * Enable the receive queues. 2380 */ 2381 for (i = 0; i < mp->rxq_count; i++) { 2382 struct rx_queue *rxq = mp->rxq + i; 2383 u32 addr; 2384 2385 addr = (u32)rxq->rx_desc_dma; 2386 addr += rxq->rx_curr_desc * sizeof(struct rx_desc); 2387 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr); 2388 2389 rxq_enable(rxq); 2390 } 2391 } 2392 2393 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp) 2394 { 2395 int skb_size; 2396 2397 /* 2398 * Reserve 2+14 bytes for an ethernet header (the hardware 2399 * automatically prepends 2 bytes of dummy data to each 2400 * received packet), 16 bytes for up to four VLAN tags, and 2401 * 4 bytes for the trailing FCS -- 36 bytes total. 2402 */ 2403 skb_size = mp->dev->mtu + 36; 2404 2405 /* 2406 * Make sure that the skb size is a multiple of 8 bytes, as 2407 * the lower three bits of the receive descriptor's buffer 2408 * size field are ignored by the hardware. 2409 */ 2410 mp->skb_size = (skb_size + 7) & ~7; 2411 2412 /* 2413 * If NET_SKB_PAD is smaller than a cache line, 2414 * netdev_alloc_skb() will cause skb->data to be misaligned 2415 * to a cache line boundary. If this is the case, include 2416 * some extra space to allow re-aligning the data area. 2417 */ 2418 mp->skb_size += SKB_DMA_REALIGN; 2419 } 2420 2421 static int mv643xx_eth_open(struct net_device *dev) 2422 { 2423 struct mv643xx_eth_private *mp = netdev_priv(dev); 2424 int err; 2425 int i; 2426 2427 wrlp(mp, INT_CAUSE, 0); 2428 wrlp(mp, INT_CAUSE_EXT, 0); 2429 rdlp(mp, INT_CAUSE_EXT); 2430 2431 err = request_irq(dev->irq, mv643xx_eth_irq, 2432 IRQF_SHARED, dev->name, dev); 2433 if (err) { 2434 netdev_err(dev, "can't assign irq\n"); 2435 return -EAGAIN; 2436 } 2437 2438 mv643xx_eth_recalc_skb_size(mp); 2439 2440 napi_enable(&mp->napi); 2441 2442 mp->int_mask = INT_EXT; 2443 2444 for (i = 0; i < mp->rxq_count; i++) { 2445 err = rxq_init(mp, i); 2446 if (err) { 2447 while (--i >= 0) 2448 rxq_deinit(mp->rxq + i); 2449 goto out; 2450 } 2451 2452 rxq_refill(mp->rxq + i, INT_MAX); 2453 mp->int_mask |= INT_RX_0 << i; 2454 } 2455 2456 if (mp->oom) { 2457 mp->rx_oom.expires = jiffies + (HZ / 10); 2458 add_timer(&mp->rx_oom); 2459 } 2460 2461 for (i = 0; i < mp->txq_count; i++) { 2462 err = txq_init(mp, i); 2463 if (err) { 2464 while (--i >= 0) 2465 txq_deinit(mp->txq + i); 2466 goto out_free; 2467 } 2468 mp->int_mask |= INT_TX_END_0 << i; 2469 } 2470 2471 add_timer(&mp->mib_counters_timer); 2472 port_start(mp); 2473 2474 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); 2475 wrlp(mp, INT_MASK, mp->int_mask); 2476 2477 return 0; 2478 2479 2480 out_free: 2481 for (i = 0; i < mp->rxq_count; i++) 2482 rxq_deinit(mp->rxq + i); 2483 out: 2484 free_irq(dev->irq, dev); 2485 2486 return err; 2487 } 2488 2489 static void port_reset(struct mv643xx_eth_private *mp) 2490 { 2491 unsigned int data; 2492 int i; 2493 2494 for (i = 0; i < mp->rxq_count; i++) 2495 rxq_disable(mp->rxq + i); 2496 for (i = 0; i < mp->txq_count; i++) 2497 txq_disable(mp->txq + i); 2498 2499 while (1) { 2500 u32 ps = rdlp(mp, PORT_STATUS); 2501 2502 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) 2503 break; 2504 udelay(10); 2505 } 2506 2507 /* Reset the Enable bit in the Configuration Register */ 2508 data = rdlp(mp, PORT_SERIAL_CONTROL); 2509 data &= ~(SERIAL_PORT_ENABLE | 2510 DO_NOT_FORCE_LINK_FAIL | 2511 FORCE_LINK_PASS); 2512 wrlp(mp, PORT_SERIAL_CONTROL, data); 2513 } 2514 2515 static int mv643xx_eth_stop(struct net_device *dev) 2516 { 2517 struct mv643xx_eth_private *mp = netdev_priv(dev); 2518 int i; 2519 2520 wrlp(mp, INT_MASK_EXT, 0x00000000); 2521 wrlp(mp, INT_MASK, 0x00000000); 2522 rdlp(mp, INT_MASK); 2523 2524 napi_disable(&mp->napi); 2525 2526 del_timer_sync(&mp->rx_oom); 2527 2528 netif_carrier_off(dev); 2529 if (dev->phydev) 2530 phy_stop(dev->phydev); 2531 free_irq(dev->irq, dev); 2532 2533 port_reset(mp); 2534 mv643xx_eth_get_stats(dev); 2535 mib_counters_update(mp); 2536 del_timer_sync(&mp->mib_counters_timer); 2537 2538 for (i = 0; i < mp->rxq_count; i++) 2539 rxq_deinit(mp->rxq + i); 2540 for (i = 0; i < mp->txq_count; i++) 2541 txq_deinit(mp->txq + i); 2542 2543 return 0; 2544 } 2545 2546 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2547 { 2548 int ret; 2549 2550 if (!dev->phydev) 2551 return -ENOTSUPP; 2552 2553 ret = phy_mii_ioctl(dev->phydev, ifr, cmd); 2554 if (!ret) 2555 mv643xx_eth_adjust_link(dev); 2556 return ret; 2557 } 2558 2559 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 2560 { 2561 struct mv643xx_eth_private *mp = netdev_priv(dev); 2562 2563 dev->mtu = new_mtu; 2564 mv643xx_eth_recalc_skb_size(mp); 2565 tx_set_rate(mp, 1000000000, 16777216); 2566 2567 if (!netif_running(dev)) 2568 return 0; 2569 2570 /* 2571 * Stop and then re-open the interface. This will allocate RX 2572 * skbs of the new MTU. 2573 * There is a possible danger that the open will not succeed, 2574 * due to memory being full. 2575 */ 2576 mv643xx_eth_stop(dev); 2577 if (mv643xx_eth_open(dev)) { 2578 netdev_err(dev, 2579 "fatal error on re-opening device after MTU change\n"); 2580 } 2581 2582 return 0; 2583 } 2584 2585 static void tx_timeout_task(struct work_struct *ugly) 2586 { 2587 struct mv643xx_eth_private *mp; 2588 2589 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task); 2590 if (netif_running(mp->dev)) { 2591 netif_tx_stop_all_queues(mp->dev); 2592 port_reset(mp); 2593 port_start(mp); 2594 netif_tx_wake_all_queues(mp->dev); 2595 } 2596 } 2597 2598 static void mv643xx_eth_tx_timeout(struct net_device *dev, unsigned int txqueue) 2599 { 2600 struct mv643xx_eth_private *mp = netdev_priv(dev); 2601 2602 netdev_info(dev, "tx timeout\n"); 2603 2604 schedule_work(&mp->tx_timeout_task); 2605 } 2606 2607 #ifdef CONFIG_NET_POLL_CONTROLLER 2608 static void mv643xx_eth_netpoll(struct net_device *dev) 2609 { 2610 struct mv643xx_eth_private *mp = netdev_priv(dev); 2611 2612 wrlp(mp, INT_MASK, 0x00000000); 2613 rdlp(mp, INT_MASK); 2614 2615 mv643xx_eth_irq(dev->irq, dev); 2616 2617 wrlp(mp, INT_MASK, mp->int_mask); 2618 } 2619 #endif 2620 2621 2622 /* platform glue ************************************************************/ 2623 static void 2624 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, 2625 const struct mbus_dram_target_info *dram) 2626 { 2627 void __iomem *base = msp->base; 2628 u32 win_enable; 2629 u32 win_protect; 2630 int i; 2631 2632 for (i = 0; i < 6; i++) { 2633 writel(0, base + WINDOW_BASE(i)); 2634 writel(0, base + WINDOW_SIZE(i)); 2635 if (i < 4) 2636 writel(0, base + WINDOW_REMAP_HIGH(i)); 2637 } 2638 2639 win_enable = 0x3f; 2640 win_protect = 0; 2641 2642 for (i = 0; i < dram->num_cs; i++) { 2643 const struct mbus_dram_window *cs = dram->cs + i; 2644 2645 writel((cs->base & 0xffff0000) | 2646 (cs->mbus_attr << 8) | 2647 dram->mbus_dram_target_id, base + WINDOW_BASE(i)); 2648 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); 2649 2650 win_enable &= ~(1 << i); 2651 win_protect |= 3 << (2 * i); 2652 } 2653 2654 writel(win_enable, base + WINDOW_BAR_ENABLE); 2655 msp->win_protect = win_protect; 2656 } 2657 2658 static void infer_hw_params(struct mv643xx_eth_shared_private *msp) 2659 { 2660 /* 2661 * Check whether we have a 14-bit coal limit field in bits 2662 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the 2663 * SDMA config register. 2664 */ 2665 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); 2666 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) 2667 msp->extended_rx_coal_limit = 1; 2668 else 2669 msp->extended_rx_coal_limit = 0; 2670 2671 /* 2672 * Check whether the MAC supports TX rate control, and if 2673 * yes, whether its associated registers are in the old or 2674 * the new place. 2675 */ 2676 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); 2677 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { 2678 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; 2679 } else { 2680 writel(7, msp->base + 0x0400 + TX_BW_RATE); 2681 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) 2682 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; 2683 else 2684 msp->tx_bw_control = TX_BW_CONTROL_ABSENT; 2685 } 2686 } 2687 2688 #if defined(CONFIG_OF) 2689 static const struct of_device_id mv643xx_eth_shared_ids[] = { 2690 { .compatible = "marvell,orion-eth", }, 2691 { .compatible = "marvell,kirkwood-eth", }, 2692 { } 2693 }; 2694 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); 2695 #endif 2696 2697 #ifdef CONFIG_OF_IRQ 2698 #define mv643xx_eth_property(_np, _name, _v) \ 2699 do { \ 2700 u32 tmp; \ 2701 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ 2702 _v = tmp; \ 2703 } while (0) 2704 2705 static struct platform_device *port_platdev[3]; 2706 2707 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, 2708 struct device_node *pnp) 2709 { 2710 struct platform_device *ppdev; 2711 struct mv643xx_eth_platform_data ppd; 2712 struct resource res; 2713 int ret; 2714 int dev_num = 0; 2715 2716 memset(&ppd, 0, sizeof(ppd)); 2717 ppd.shared = pdev; 2718 2719 memset(&res, 0, sizeof(res)); 2720 if (of_irq_to_resource(pnp, 0, &res) <= 0) { 2721 dev_err(&pdev->dev, "missing interrupt on %pOFn\n", pnp); 2722 return -EINVAL; 2723 } 2724 2725 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { 2726 dev_err(&pdev->dev, "missing reg property on %pOFn\n", pnp); 2727 return -EINVAL; 2728 } 2729 2730 if (ppd.port_number >= 3) { 2731 dev_err(&pdev->dev, "invalid reg property on %pOFn\n", pnp); 2732 return -EINVAL; 2733 } 2734 2735 while (dev_num < 3 && port_platdev[dev_num]) 2736 dev_num++; 2737 2738 if (dev_num == 3) { 2739 dev_err(&pdev->dev, "too many ports registered\n"); 2740 return -EINVAL; 2741 } 2742 2743 of_get_mac_address(pnp, ppd.mac_addr); 2744 2745 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); 2746 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); 2747 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); 2748 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); 2749 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); 2750 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); 2751 2752 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); 2753 if (!ppd.phy_node) { 2754 ppd.phy_addr = MV643XX_ETH_PHY_NONE; 2755 of_property_read_u32(pnp, "speed", &ppd.speed); 2756 of_property_read_u32(pnp, "duplex", &ppd.duplex); 2757 } 2758 2759 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); 2760 if (!ppdev) 2761 return -ENOMEM; 2762 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 2763 ppdev->dev.of_node = pnp; 2764 2765 ret = platform_device_add_resources(ppdev, &res, 1); 2766 if (ret) 2767 goto port_err; 2768 2769 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); 2770 if (ret) 2771 goto port_err; 2772 2773 ret = platform_device_add(ppdev); 2774 if (ret) 2775 goto port_err; 2776 2777 port_platdev[dev_num] = ppdev; 2778 2779 return 0; 2780 2781 port_err: 2782 platform_device_put(ppdev); 2783 return ret; 2784 } 2785 2786 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2787 { 2788 struct mv643xx_eth_shared_platform_data *pd; 2789 struct device_node *pnp, *np = pdev->dev.of_node; 2790 int ret; 2791 2792 /* bail out if not registered from DT */ 2793 if (!np) 2794 return 0; 2795 2796 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); 2797 if (!pd) 2798 return -ENOMEM; 2799 pdev->dev.platform_data = pd; 2800 2801 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); 2802 2803 for_each_available_child_of_node(np, pnp) { 2804 ret = mv643xx_eth_shared_of_add_port(pdev, pnp); 2805 if (ret) { 2806 of_node_put(pnp); 2807 return ret; 2808 } 2809 } 2810 return 0; 2811 } 2812 2813 static void mv643xx_eth_shared_of_remove(void) 2814 { 2815 int n; 2816 2817 for (n = 0; n < 3; n++) { 2818 platform_device_del(port_platdev[n]); 2819 port_platdev[n] = NULL; 2820 } 2821 } 2822 #else 2823 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2824 { 2825 return 0; 2826 } 2827 2828 static inline void mv643xx_eth_shared_of_remove(void) 2829 { 2830 } 2831 #endif 2832 2833 static int mv643xx_eth_shared_probe(struct platform_device *pdev) 2834 { 2835 static int mv643xx_eth_version_printed; 2836 struct mv643xx_eth_shared_platform_data *pd; 2837 struct mv643xx_eth_shared_private *msp; 2838 const struct mbus_dram_target_info *dram; 2839 struct resource *res; 2840 int ret; 2841 2842 if (!mv643xx_eth_version_printed++) 2843 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", 2844 mv643xx_eth_driver_version); 2845 2846 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2847 if (res == NULL) 2848 return -EINVAL; 2849 2850 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); 2851 if (msp == NULL) 2852 return -ENOMEM; 2853 platform_set_drvdata(pdev, msp); 2854 2855 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 2856 if (msp->base == NULL) 2857 return -ENOMEM; 2858 2859 msp->clk = devm_clk_get(&pdev->dev, NULL); 2860 if (!IS_ERR(msp->clk)) 2861 clk_prepare_enable(msp->clk); 2862 2863 /* 2864 * (Re-)program MBUS remapping windows if we are asked to. 2865 */ 2866 dram = mv_mbus_dram_info(); 2867 if (dram) 2868 mv643xx_eth_conf_mbus_windows(msp, dram); 2869 2870 ret = mv643xx_eth_shared_of_probe(pdev); 2871 if (ret) 2872 goto err_put_clk; 2873 pd = dev_get_platdata(&pdev->dev); 2874 2875 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? 2876 pd->tx_csum_limit : 9 * 1024; 2877 infer_hw_params(msp); 2878 2879 return 0; 2880 2881 err_put_clk: 2882 if (!IS_ERR(msp->clk)) 2883 clk_disable_unprepare(msp->clk); 2884 return ret; 2885 } 2886 2887 static int mv643xx_eth_shared_remove(struct platform_device *pdev) 2888 { 2889 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); 2890 2891 mv643xx_eth_shared_of_remove(); 2892 if (!IS_ERR(msp->clk)) 2893 clk_disable_unprepare(msp->clk); 2894 return 0; 2895 } 2896 2897 static struct platform_driver mv643xx_eth_shared_driver = { 2898 .probe = mv643xx_eth_shared_probe, 2899 .remove = mv643xx_eth_shared_remove, 2900 .driver = { 2901 .name = MV643XX_ETH_SHARED_NAME, 2902 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), 2903 }, 2904 }; 2905 2906 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) 2907 { 2908 int addr_shift = 5 * mp->port_num; 2909 u32 data; 2910 2911 data = rdl(mp, PHY_ADDR); 2912 data &= ~(0x1f << addr_shift); 2913 data |= (phy_addr & 0x1f) << addr_shift; 2914 wrl(mp, PHY_ADDR, data); 2915 } 2916 2917 static int phy_addr_get(struct mv643xx_eth_private *mp) 2918 { 2919 unsigned int data; 2920 2921 data = rdl(mp, PHY_ADDR); 2922 2923 return (data >> (5 * mp->port_num)) & 0x1f; 2924 } 2925 2926 static void set_params(struct mv643xx_eth_private *mp, 2927 struct mv643xx_eth_platform_data *pd) 2928 { 2929 struct net_device *dev = mp->dev; 2930 unsigned int tx_ring_size; 2931 2932 if (is_valid_ether_addr(pd->mac_addr)) { 2933 eth_hw_addr_set(dev, pd->mac_addr); 2934 } else { 2935 u8 addr[ETH_ALEN]; 2936 2937 uc_addr_get(mp, addr); 2938 eth_hw_addr_set(dev, addr); 2939 } 2940 2941 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE; 2942 if (pd->rx_queue_size) 2943 mp->rx_ring_size = pd->rx_queue_size; 2944 mp->rx_desc_sram_addr = pd->rx_sram_addr; 2945 mp->rx_desc_sram_size = pd->rx_sram_size; 2946 2947 mp->rxq_count = pd->rx_queue_count ? : 1; 2948 2949 tx_ring_size = DEFAULT_TX_QUEUE_SIZE; 2950 if (pd->tx_queue_size) 2951 tx_ring_size = pd->tx_queue_size; 2952 2953 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size, 2954 MV643XX_MAX_SKB_DESCS * 2, 4096); 2955 if (mp->tx_ring_size != tx_ring_size) 2956 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 2957 mp->tx_ring_size, tx_ring_size); 2958 2959 mp->tx_desc_sram_addr = pd->tx_sram_addr; 2960 mp->tx_desc_sram_size = pd->tx_sram_size; 2961 2962 mp->txq_count = pd->tx_queue_count ? : 1; 2963 } 2964 2965 static int get_phy_mode(struct mv643xx_eth_private *mp) 2966 { 2967 struct device *dev = mp->dev->dev.parent; 2968 phy_interface_t iface; 2969 int err; 2970 2971 if (dev->of_node) 2972 err = of_get_phy_mode(dev->of_node, &iface); 2973 2974 /* Historical default if unspecified. We could also read/write 2975 * the interface state in the PSC1 2976 */ 2977 if (!dev->of_node || err) 2978 iface = PHY_INTERFACE_MODE_GMII; 2979 return iface; 2980 } 2981 2982 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp, 2983 int phy_addr) 2984 { 2985 struct phy_device *phydev; 2986 int start; 2987 int num; 2988 int i; 2989 char phy_id[MII_BUS_ID_SIZE + 3]; 2990 2991 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { 2992 start = phy_addr_get(mp) & 0x1f; 2993 num = 32; 2994 } else { 2995 start = phy_addr & 0x1f; 2996 num = 1; 2997 } 2998 2999 /* Attempt to connect to the PHY using orion-mdio */ 3000 phydev = ERR_PTR(-ENODEV); 3001 for (i = 0; i < num; i++) { 3002 int addr = (start + i) & 0x1f; 3003 3004 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, 3005 "orion-mdio-mii", addr); 3006 3007 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, 3008 get_phy_mode(mp)); 3009 if (!IS_ERR(phydev)) { 3010 phy_addr_set(mp, addr); 3011 break; 3012 } 3013 } 3014 3015 return phydev; 3016 } 3017 3018 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) 3019 { 3020 struct net_device *dev = mp->dev; 3021 struct phy_device *phy = dev->phydev; 3022 3023 if (speed == 0) { 3024 phy->autoneg = AUTONEG_ENABLE; 3025 phy->speed = 0; 3026 phy->duplex = 0; 3027 linkmode_copy(phy->advertising, phy->supported); 3028 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, 3029 phy->advertising); 3030 } else { 3031 phy->autoneg = AUTONEG_DISABLE; 3032 linkmode_zero(phy->advertising); 3033 phy->speed = speed; 3034 phy->duplex = duplex; 3035 } 3036 phy_start_aneg(phy); 3037 } 3038 3039 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) 3040 { 3041 struct net_device *dev = mp->dev; 3042 u32 pscr; 3043 3044 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 3045 if (pscr & SERIAL_PORT_ENABLE) { 3046 pscr &= ~SERIAL_PORT_ENABLE; 3047 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3048 } 3049 3050 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; 3051 if (!dev->phydev) { 3052 pscr |= DISABLE_AUTO_NEG_SPEED_GMII; 3053 if (speed == SPEED_1000) 3054 pscr |= SET_GMII_SPEED_TO_1000; 3055 else if (speed == SPEED_100) 3056 pscr |= SET_MII_SPEED_TO_100; 3057 3058 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; 3059 3060 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; 3061 if (duplex == DUPLEX_FULL) 3062 pscr |= SET_FULL_DUPLEX_MODE; 3063 } 3064 3065 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 3066 } 3067 3068 static const struct net_device_ops mv643xx_eth_netdev_ops = { 3069 .ndo_open = mv643xx_eth_open, 3070 .ndo_stop = mv643xx_eth_stop, 3071 .ndo_start_xmit = mv643xx_eth_xmit, 3072 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, 3073 .ndo_set_mac_address = mv643xx_eth_set_mac_address, 3074 .ndo_validate_addr = eth_validate_addr, 3075 .ndo_eth_ioctl = mv643xx_eth_ioctl, 3076 .ndo_change_mtu = mv643xx_eth_change_mtu, 3077 .ndo_set_features = mv643xx_eth_set_features, 3078 .ndo_tx_timeout = mv643xx_eth_tx_timeout, 3079 .ndo_get_stats = mv643xx_eth_get_stats, 3080 #ifdef CONFIG_NET_POLL_CONTROLLER 3081 .ndo_poll_controller = mv643xx_eth_netpoll, 3082 #endif 3083 }; 3084 3085 static int mv643xx_eth_probe(struct platform_device *pdev) 3086 { 3087 struct mv643xx_eth_platform_data *pd; 3088 struct mv643xx_eth_private *mp; 3089 struct net_device *dev; 3090 struct phy_device *phydev = NULL; 3091 struct resource *res; 3092 int err; 3093 3094 pd = dev_get_platdata(&pdev->dev); 3095 if (pd == NULL) { 3096 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); 3097 return -ENODEV; 3098 } 3099 3100 if (pd->shared == NULL) { 3101 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); 3102 return -ENODEV; 3103 } 3104 3105 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); 3106 if (!dev) 3107 return -ENOMEM; 3108 3109 SET_NETDEV_DEV(dev, &pdev->dev); 3110 mp = netdev_priv(dev); 3111 platform_set_drvdata(pdev, mp); 3112 3113 mp->shared = platform_get_drvdata(pd->shared); 3114 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); 3115 mp->port_num = pd->port_number; 3116 3117 mp->dev = dev; 3118 3119 /* Kirkwood resets some registers on gated clocks. Especially 3120 * CLK125_BYPASS_EN must be cleared but is not available on 3121 * all other SoCs/System Controllers using this driver. 3122 */ 3123 if (of_device_is_compatible(pdev->dev.of_node, 3124 "marvell,kirkwood-eth-port")) 3125 wrlp(mp, PORT_SERIAL_CONTROL1, 3126 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); 3127 3128 /* 3129 * Start with a default rate, and if there is a clock, allow 3130 * it to override the default. 3131 */ 3132 mp->t_clk = 133000000; 3133 mp->clk = devm_clk_get(&pdev->dev, NULL); 3134 if (!IS_ERR(mp->clk)) { 3135 clk_prepare_enable(mp->clk); 3136 mp->t_clk = clk_get_rate(mp->clk); 3137 } else if (!IS_ERR(mp->shared->clk)) { 3138 mp->t_clk = clk_get_rate(mp->shared->clk); 3139 } 3140 3141 set_params(mp, pd); 3142 netif_set_real_num_tx_queues(dev, mp->txq_count); 3143 netif_set_real_num_rx_queues(dev, mp->rxq_count); 3144 3145 err = 0; 3146 if (pd->phy_node) { 3147 phydev = of_phy_connect(mp->dev, pd->phy_node, 3148 mv643xx_eth_adjust_link, 0, 3149 get_phy_mode(mp)); 3150 if (!phydev) 3151 err = -ENODEV; 3152 else 3153 phy_addr_set(mp, phydev->mdio.addr); 3154 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { 3155 phydev = phy_scan(mp, pd->phy_addr); 3156 3157 if (IS_ERR(phydev)) 3158 err = PTR_ERR(phydev); 3159 else 3160 phy_init(mp, pd->speed, pd->duplex); 3161 } 3162 if (err == -ENODEV) { 3163 err = -EPROBE_DEFER; 3164 goto out; 3165 } 3166 if (err) 3167 goto out; 3168 3169 dev->ethtool_ops = &mv643xx_eth_ethtool_ops; 3170 3171 init_pscr(mp, pd->speed, pd->duplex); 3172 3173 3174 mib_counters_clear(mp); 3175 3176 timer_setup(&mp->mib_counters_timer, mib_counters_timer_wrapper, 0); 3177 mp->mib_counters_timer.expires = jiffies + 30 * HZ; 3178 3179 spin_lock_init(&mp->mib_counters_lock); 3180 3181 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); 3182 3183 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT); 3184 3185 timer_setup(&mp->rx_oom, oom_timer_wrapper, 0); 3186 3187 3188 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 3189 BUG_ON(!res); 3190 dev->irq = res->start; 3191 3192 dev->netdev_ops = &mv643xx_eth_netdev_ops; 3193 3194 dev->watchdog_timeo = 2 * HZ; 3195 dev->base_addr = 0; 3196 3197 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; 3198 dev->vlan_features = dev->features; 3199 3200 dev->features |= NETIF_F_RXCSUM; 3201 dev->hw_features = dev->features; 3202 3203 dev->priv_flags |= IFF_UNICAST_FLT; 3204 netif_set_gso_max_segs(dev, MV643XX_MAX_TSO_SEGS); 3205 3206 /* MTU range: 64 - 9500 */ 3207 dev->min_mtu = 64; 3208 dev->max_mtu = 9500; 3209 3210 if (mp->shared->win_protect) 3211 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); 3212 3213 netif_carrier_off(dev); 3214 3215 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); 3216 3217 set_rx_coal(mp, 250); 3218 set_tx_coal(mp, 0); 3219 3220 err = register_netdev(dev); 3221 if (err) 3222 goto out; 3223 3224 netdev_notice(dev, "port %d with MAC address %pM\n", 3225 mp->port_num, dev->dev_addr); 3226 3227 if (mp->tx_desc_sram_size > 0) 3228 netdev_notice(dev, "configured with sram\n"); 3229 3230 return 0; 3231 3232 out: 3233 if (!IS_ERR(mp->clk)) 3234 clk_disable_unprepare(mp->clk); 3235 free_netdev(dev); 3236 3237 return err; 3238 } 3239 3240 static int mv643xx_eth_remove(struct platform_device *pdev) 3241 { 3242 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3243 struct net_device *dev = mp->dev; 3244 3245 unregister_netdev(mp->dev); 3246 if (dev->phydev) 3247 phy_disconnect(dev->phydev); 3248 cancel_work_sync(&mp->tx_timeout_task); 3249 3250 if (!IS_ERR(mp->clk)) 3251 clk_disable_unprepare(mp->clk); 3252 3253 free_netdev(mp->dev); 3254 3255 return 0; 3256 } 3257 3258 static void mv643xx_eth_shutdown(struct platform_device *pdev) 3259 { 3260 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3261 3262 /* Mask all interrupts on ethernet port */ 3263 wrlp(mp, INT_MASK, 0); 3264 rdlp(mp, INT_MASK); 3265 3266 if (netif_running(mp->dev)) 3267 port_reset(mp); 3268 } 3269 3270 static struct platform_driver mv643xx_eth_driver = { 3271 .probe = mv643xx_eth_probe, 3272 .remove = mv643xx_eth_remove, 3273 .shutdown = mv643xx_eth_shutdown, 3274 .driver = { 3275 .name = MV643XX_ETH_NAME, 3276 }, 3277 }; 3278 3279 static struct platform_driver * const drivers[] = { 3280 &mv643xx_eth_shared_driver, 3281 &mv643xx_eth_driver, 3282 }; 3283 3284 static int __init mv643xx_eth_init_module(void) 3285 { 3286 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 3287 } 3288 module_init(mv643xx_eth_init_module); 3289 3290 static void __exit mv643xx_eth_cleanup_module(void) 3291 { 3292 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 3293 } 3294 module_exit(mv643xx_eth_cleanup_module); 3295 3296 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " 3297 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); 3298 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); 3299 MODULE_LICENSE("GPL"); 3300 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); 3301 MODULE_ALIAS("platform:" MV643XX_ETH_NAME); 3302