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, write to the Free Software 37 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 38 */ 39 40 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 41 42 #include <linux/init.h> 43 #include <linux/dma-mapping.h> 44 #include <linux/in.h> 45 #include <linux/ip.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 256 184 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) 185 186 187 /* 188 * RX/TX descriptors. 189 */ 190 #if defined(__BIG_ENDIAN) 191 struct rx_desc { 192 u16 byte_cnt; /* Descriptor buffer byte count */ 193 u16 buf_size; /* Buffer size */ 194 u32 cmd_sts; /* Descriptor command status */ 195 u32 next_desc_ptr; /* Next descriptor pointer */ 196 u32 buf_ptr; /* Descriptor buffer pointer */ 197 }; 198 199 struct tx_desc { 200 u16 byte_cnt; /* buffer byte count */ 201 u16 l4i_chk; /* CPU provided TCP checksum */ 202 u32 cmd_sts; /* Command/status field */ 203 u32 next_desc_ptr; /* Pointer to next descriptor */ 204 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 205 }; 206 #elif defined(__LITTLE_ENDIAN) 207 struct rx_desc { 208 u32 cmd_sts; /* Descriptor command status */ 209 u16 buf_size; /* Buffer size */ 210 u16 byte_cnt; /* Descriptor buffer byte count */ 211 u32 buf_ptr; /* Descriptor buffer pointer */ 212 u32 next_desc_ptr; /* Next descriptor pointer */ 213 }; 214 215 struct tx_desc { 216 u32 cmd_sts; /* Command/status field */ 217 u16 l4i_chk; /* CPU provided TCP checksum */ 218 u16 byte_cnt; /* buffer byte count */ 219 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 220 u32 next_desc_ptr; /* Pointer to next descriptor */ 221 }; 222 #else 223 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 224 #endif 225 226 /* RX & TX descriptor command */ 227 #define BUFFER_OWNED_BY_DMA 0x80000000 228 229 /* RX & TX descriptor status */ 230 #define ERROR_SUMMARY 0x00000001 231 232 /* RX descriptor status */ 233 #define LAYER_4_CHECKSUM_OK 0x40000000 234 #define RX_ENABLE_INTERRUPT 0x20000000 235 #define RX_FIRST_DESC 0x08000000 236 #define RX_LAST_DESC 0x04000000 237 #define RX_IP_HDR_OK 0x02000000 238 #define RX_PKT_IS_IPV4 0x01000000 239 #define RX_PKT_IS_ETHERNETV2 0x00800000 240 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000 241 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000 242 #define RX_PKT_IS_VLAN_TAGGED 0x00080000 243 244 /* TX descriptor command */ 245 #define TX_ENABLE_INTERRUPT 0x00800000 246 #define GEN_CRC 0x00400000 247 #define TX_FIRST_DESC 0x00200000 248 #define TX_LAST_DESC 0x00100000 249 #define ZERO_PADDING 0x00080000 250 #define GEN_IP_V4_CHECKSUM 0x00040000 251 #define GEN_TCP_UDP_CHECKSUM 0x00020000 252 #define UDP_FRAME 0x00010000 253 #define MAC_HDR_EXTRA_4_BYTES 0x00008000 254 #define MAC_HDR_EXTRA_8_BYTES 0x00000200 255 256 #define TX_IHL_SHIFT 11 257 258 259 /* global *******************************************************************/ 260 struct mv643xx_eth_shared_private { 261 /* 262 * Ethernet controller base address. 263 */ 264 void __iomem *base; 265 266 /* 267 * Per-port MBUS window access register value. 268 */ 269 u32 win_protect; 270 271 /* 272 * Hardware-specific parameters. 273 */ 274 int extended_rx_coal_limit; 275 int tx_bw_control; 276 int tx_csum_limit; 277 struct clk *clk; 278 }; 279 280 #define TX_BW_CONTROL_ABSENT 0 281 #define TX_BW_CONTROL_OLD_LAYOUT 1 282 #define TX_BW_CONTROL_NEW_LAYOUT 2 283 284 static int mv643xx_eth_open(struct net_device *dev); 285 static int mv643xx_eth_stop(struct net_device *dev); 286 287 288 /* per-port *****************************************************************/ 289 struct mib_counters { 290 u64 good_octets_received; 291 u32 bad_octets_received; 292 u32 internal_mac_transmit_err; 293 u32 good_frames_received; 294 u32 bad_frames_received; 295 u32 broadcast_frames_received; 296 u32 multicast_frames_received; 297 u32 frames_64_octets; 298 u32 frames_65_to_127_octets; 299 u32 frames_128_to_255_octets; 300 u32 frames_256_to_511_octets; 301 u32 frames_512_to_1023_octets; 302 u32 frames_1024_to_max_octets; 303 u64 good_octets_sent; 304 u32 good_frames_sent; 305 u32 excessive_collision; 306 u32 multicast_frames_sent; 307 u32 broadcast_frames_sent; 308 u32 unrec_mac_control_received; 309 u32 fc_sent; 310 u32 good_fc_received; 311 u32 bad_fc_received; 312 u32 undersize_received; 313 u32 fragments_received; 314 u32 oversize_received; 315 u32 jabber_received; 316 u32 mac_receive_error; 317 u32 bad_crc_event; 318 u32 collision; 319 u32 late_collision; 320 /* Non MIB hardware counters */ 321 u32 rx_discard; 322 u32 rx_overrun; 323 }; 324 325 struct rx_queue { 326 int index; 327 328 int rx_ring_size; 329 330 int rx_desc_count; 331 int rx_curr_desc; 332 int rx_used_desc; 333 334 struct rx_desc *rx_desc_area; 335 dma_addr_t rx_desc_dma; 336 int rx_desc_area_size; 337 struct sk_buff **rx_skb; 338 }; 339 340 struct tx_queue { 341 int index; 342 343 int tx_ring_size; 344 345 int tx_desc_count; 346 int tx_curr_desc; 347 int tx_used_desc; 348 349 struct tx_desc *tx_desc_area; 350 dma_addr_t tx_desc_dma; 351 int tx_desc_area_size; 352 353 struct sk_buff_head tx_skb; 354 355 unsigned long tx_packets; 356 unsigned long tx_bytes; 357 unsigned long tx_dropped; 358 }; 359 360 struct mv643xx_eth_private { 361 struct mv643xx_eth_shared_private *shared; 362 void __iomem *base; 363 int port_num; 364 365 struct net_device *dev; 366 367 struct phy_device *phy; 368 369 struct timer_list mib_counters_timer; 370 spinlock_t mib_counters_lock; 371 struct mib_counters mib_counters; 372 373 struct work_struct tx_timeout_task; 374 375 struct napi_struct napi; 376 u32 int_mask; 377 u8 oom; 378 u8 work_link; 379 u8 work_tx; 380 u8 work_tx_end; 381 u8 work_rx; 382 u8 work_rx_refill; 383 384 int skb_size; 385 386 /* 387 * RX state. 388 */ 389 int rx_ring_size; 390 unsigned long rx_desc_sram_addr; 391 int rx_desc_sram_size; 392 int rxq_count; 393 struct timer_list rx_oom; 394 struct rx_queue rxq[8]; 395 396 /* 397 * TX state. 398 */ 399 int tx_ring_size; 400 unsigned long tx_desc_sram_addr; 401 int tx_desc_sram_size; 402 int txq_count; 403 struct tx_queue txq[8]; 404 405 /* 406 * Hardware-specific parameters. 407 */ 408 struct clk *clk; 409 unsigned int t_clk; 410 }; 411 412 413 /* port register accessors **************************************************/ 414 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset) 415 { 416 return readl(mp->shared->base + offset); 417 } 418 419 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset) 420 { 421 return readl(mp->base + offset); 422 } 423 424 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data) 425 { 426 writel(data, mp->shared->base + offset); 427 } 428 429 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data) 430 { 431 writel(data, mp->base + offset); 432 } 433 434 435 /* rxq/txq helper functions *************************************************/ 436 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) 437 { 438 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]); 439 } 440 441 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) 442 { 443 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]); 444 } 445 446 static void rxq_enable(struct rx_queue *rxq) 447 { 448 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 449 wrlp(mp, RXQ_COMMAND, 1 << rxq->index); 450 } 451 452 static void rxq_disable(struct rx_queue *rxq) 453 { 454 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 455 u8 mask = 1 << rxq->index; 456 457 wrlp(mp, RXQ_COMMAND, mask << 8); 458 while (rdlp(mp, RXQ_COMMAND) & mask) 459 udelay(10); 460 } 461 462 static void txq_reset_hw_ptr(struct tx_queue *txq) 463 { 464 struct mv643xx_eth_private *mp = txq_to_mp(txq); 465 u32 addr; 466 467 addr = (u32)txq->tx_desc_dma; 468 addr += txq->tx_curr_desc * sizeof(struct tx_desc); 469 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr); 470 } 471 472 static void txq_enable(struct tx_queue *txq) 473 { 474 struct mv643xx_eth_private *mp = txq_to_mp(txq); 475 wrlp(mp, TXQ_COMMAND, 1 << txq->index); 476 } 477 478 static void txq_disable(struct tx_queue *txq) 479 { 480 struct mv643xx_eth_private *mp = txq_to_mp(txq); 481 u8 mask = 1 << txq->index; 482 483 wrlp(mp, TXQ_COMMAND, mask << 8); 484 while (rdlp(mp, TXQ_COMMAND) & mask) 485 udelay(10); 486 } 487 488 static void txq_maybe_wake(struct tx_queue *txq) 489 { 490 struct mv643xx_eth_private *mp = txq_to_mp(txq); 491 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 492 493 if (netif_tx_queue_stopped(nq)) { 494 __netif_tx_lock(nq, smp_processor_id()); 495 if (txq->tx_ring_size - txq->tx_desc_count >= MAX_SKB_FRAGS + 1) 496 netif_tx_wake_queue(nq); 497 __netif_tx_unlock(nq); 498 } 499 } 500 501 static int rxq_process(struct rx_queue *rxq, int budget) 502 { 503 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 504 struct net_device_stats *stats = &mp->dev->stats; 505 int rx; 506 507 rx = 0; 508 while (rx < budget && rxq->rx_desc_count) { 509 struct rx_desc *rx_desc; 510 unsigned int cmd_sts; 511 struct sk_buff *skb; 512 u16 byte_cnt; 513 514 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc]; 515 516 cmd_sts = rx_desc->cmd_sts; 517 if (cmd_sts & BUFFER_OWNED_BY_DMA) 518 break; 519 rmb(); 520 521 skb = rxq->rx_skb[rxq->rx_curr_desc]; 522 rxq->rx_skb[rxq->rx_curr_desc] = NULL; 523 524 rxq->rx_curr_desc++; 525 if (rxq->rx_curr_desc == rxq->rx_ring_size) 526 rxq->rx_curr_desc = 0; 527 528 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr, 529 rx_desc->buf_size, DMA_FROM_DEVICE); 530 rxq->rx_desc_count--; 531 rx++; 532 533 mp->work_rx_refill |= 1 << rxq->index; 534 535 byte_cnt = rx_desc->byte_cnt; 536 537 /* 538 * Update statistics. 539 * 540 * Note that the descriptor byte count includes 2 dummy 541 * bytes automatically inserted by the hardware at the 542 * start of the packet (which we don't count), and a 4 543 * byte CRC at the end of the packet (which we do count). 544 */ 545 stats->rx_packets++; 546 stats->rx_bytes += byte_cnt - 2; 547 548 /* 549 * In case we received a packet without first / last bits 550 * on, or the error summary bit is set, the packet needs 551 * to be dropped. 552 */ 553 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY)) 554 != (RX_FIRST_DESC | RX_LAST_DESC)) 555 goto err; 556 557 /* 558 * The -4 is for the CRC in the trailer of the 559 * received packet 560 */ 561 skb_put(skb, byte_cnt - 2 - 4); 562 563 if (cmd_sts & LAYER_4_CHECKSUM_OK) 564 skb->ip_summed = CHECKSUM_UNNECESSARY; 565 skb->protocol = eth_type_trans(skb, mp->dev); 566 567 napi_gro_receive(&mp->napi, skb); 568 569 continue; 570 571 err: 572 stats->rx_dropped++; 573 574 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != 575 (RX_FIRST_DESC | RX_LAST_DESC)) { 576 if (net_ratelimit()) 577 netdev_err(mp->dev, 578 "received packet spanning multiple descriptors\n"); 579 } 580 581 if (cmd_sts & ERROR_SUMMARY) 582 stats->rx_errors++; 583 584 dev_kfree_skb(skb); 585 } 586 587 if (rx < budget) 588 mp->work_rx &= ~(1 << rxq->index); 589 590 return rx; 591 } 592 593 static int rxq_refill(struct rx_queue *rxq, int budget) 594 { 595 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 596 int refilled; 597 598 refilled = 0; 599 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) { 600 struct sk_buff *skb; 601 int rx; 602 struct rx_desc *rx_desc; 603 int size; 604 605 skb = netdev_alloc_skb(mp->dev, mp->skb_size); 606 607 if (skb == NULL) { 608 mp->oom = 1; 609 goto oom; 610 } 611 612 if (SKB_DMA_REALIGN) 613 skb_reserve(skb, SKB_DMA_REALIGN); 614 615 refilled++; 616 rxq->rx_desc_count++; 617 618 rx = rxq->rx_used_desc++; 619 if (rxq->rx_used_desc == rxq->rx_ring_size) 620 rxq->rx_used_desc = 0; 621 622 rx_desc = rxq->rx_desc_area + rx; 623 624 size = skb_end_pointer(skb) - skb->data; 625 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent, 626 skb->data, size, 627 DMA_FROM_DEVICE); 628 rx_desc->buf_size = size; 629 rxq->rx_skb[rx] = skb; 630 wmb(); 631 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT; 632 wmb(); 633 634 /* 635 * The hardware automatically prepends 2 bytes of 636 * dummy data to each received packet, so that the 637 * IP header ends up 16-byte aligned. 638 */ 639 skb_reserve(skb, 2); 640 } 641 642 if (refilled < budget) 643 mp->work_rx_refill &= ~(1 << rxq->index); 644 645 oom: 646 return refilled; 647 } 648 649 650 /* tx ***********************************************************************/ 651 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) 652 { 653 int frag; 654 655 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { 656 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; 657 658 if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7) 659 return 1; 660 } 661 662 return 0; 663 } 664 665 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) 666 { 667 struct mv643xx_eth_private *mp = txq_to_mp(txq); 668 int nr_frags = skb_shinfo(skb)->nr_frags; 669 int frag; 670 671 for (frag = 0; frag < nr_frags; frag++) { 672 skb_frag_t *this_frag; 673 int tx_index; 674 struct tx_desc *desc; 675 676 this_frag = &skb_shinfo(skb)->frags[frag]; 677 tx_index = txq->tx_curr_desc++; 678 if (txq->tx_curr_desc == txq->tx_ring_size) 679 txq->tx_curr_desc = 0; 680 desc = &txq->tx_desc_area[tx_index]; 681 682 /* 683 * The last fragment will generate an interrupt 684 * which will free the skb on TX completion. 685 */ 686 if (frag == nr_frags - 1) { 687 desc->cmd_sts = BUFFER_OWNED_BY_DMA | 688 ZERO_PADDING | TX_LAST_DESC | 689 TX_ENABLE_INTERRUPT; 690 } else { 691 desc->cmd_sts = BUFFER_OWNED_BY_DMA; 692 } 693 694 desc->l4i_chk = 0; 695 desc->byte_cnt = skb_frag_size(this_frag); 696 desc->buf_ptr = skb_frag_dma_map(mp->dev->dev.parent, 697 this_frag, 0, 698 skb_frag_size(this_frag), 699 DMA_TO_DEVICE); 700 } 701 } 702 703 static inline __be16 sum16_as_be(__sum16 sum) 704 { 705 return (__force __be16)sum; 706 } 707 708 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb) 709 { 710 struct mv643xx_eth_private *mp = txq_to_mp(txq); 711 int nr_frags = skb_shinfo(skb)->nr_frags; 712 int tx_index; 713 struct tx_desc *desc; 714 u32 cmd_sts; 715 u16 l4i_chk; 716 int length; 717 718 cmd_sts = TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; 719 l4i_chk = 0; 720 721 if (skb->ip_summed == CHECKSUM_PARTIAL) { 722 int hdr_len; 723 int tag_bytes; 724 725 BUG_ON(skb->protocol != htons(ETH_P_IP) && 726 skb->protocol != htons(ETH_P_8021Q)); 727 728 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data; 729 tag_bytes = hdr_len - ETH_HLEN; 730 if (skb->len - hdr_len > mp->shared->tx_csum_limit || 731 unlikely(tag_bytes & ~12)) { 732 if (skb_checksum_help(skb) == 0) 733 goto no_csum; 734 kfree_skb(skb); 735 return 1; 736 } 737 738 if (tag_bytes & 4) 739 cmd_sts |= MAC_HDR_EXTRA_4_BYTES; 740 if (tag_bytes & 8) 741 cmd_sts |= MAC_HDR_EXTRA_8_BYTES; 742 743 cmd_sts |= GEN_TCP_UDP_CHECKSUM | 744 GEN_IP_V4_CHECKSUM | 745 ip_hdr(skb)->ihl << TX_IHL_SHIFT; 746 747 switch (ip_hdr(skb)->protocol) { 748 case IPPROTO_UDP: 749 cmd_sts |= UDP_FRAME; 750 l4i_chk = ntohs(sum16_as_be(udp_hdr(skb)->check)); 751 break; 752 case IPPROTO_TCP: 753 l4i_chk = ntohs(sum16_as_be(tcp_hdr(skb)->check)); 754 break; 755 default: 756 BUG(); 757 } 758 } else { 759 no_csum: 760 /* Errata BTS #50, IHL must be 5 if no HW checksum */ 761 cmd_sts |= 5 << TX_IHL_SHIFT; 762 } 763 764 tx_index = txq->tx_curr_desc++; 765 if (txq->tx_curr_desc == txq->tx_ring_size) 766 txq->tx_curr_desc = 0; 767 desc = &txq->tx_desc_area[tx_index]; 768 769 if (nr_frags) { 770 txq_submit_frag_skb(txq, skb); 771 length = skb_headlen(skb); 772 } else { 773 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT; 774 length = skb->len; 775 } 776 777 desc->l4i_chk = l4i_chk; 778 desc->byte_cnt = length; 779 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data, 780 length, DMA_TO_DEVICE); 781 782 __skb_queue_tail(&txq->tx_skb, skb); 783 784 skb_tx_timestamp(skb); 785 786 /* ensure all other descriptors are written before first cmd_sts */ 787 wmb(); 788 desc->cmd_sts = cmd_sts; 789 790 /* clear TX_END status */ 791 mp->work_tx_end &= ~(1 << txq->index); 792 793 /* ensure all descriptors are written before poking hardware */ 794 wmb(); 795 txq_enable(txq); 796 797 txq->tx_desc_count += nr_frags + 1; 798 799 return 0; 800 } 801 802 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev) 803 { 804 struct mv643xx_eth_private *mp = netdev_priv(dev); 805 int length, queue; 806 struct tx_queue *txq; 807 struct netdev_queue *nq; 808 809 queue = skb_get_queue_mapping(skb); 810 txq = mp->txq + queue; 811 nq = netdev_get_tx_queue(dev, queue); 812 813 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { 814 txq->tx_dropped++; 815 netdev_printk(KERN_DEBUG, dev, 816 "failed to linearize skb with tiny unaligned fragment\n"); 817 return NETDEV_TX_BUSY; 818 } 819 820 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) { 821 if (net_ratelimit()) 822 netdev_err(dev, "tx queue full?!\n"); 823 kfree_skb(skb); 824 return NETDEV_TX_OK; 825 } 826 827 length = skb->len; 828 829 if (!txq_submit_skb(txq, skb)) { 830 int entries_left; 831 832 txq->tx_bytes += length; 833 txq->tx_packets++; 834 835 entries_left = txq->tx_ring_size - txq->tx_desc_count; 836 if (entries_left < MAX_SKB_FRAGS + 1) 837 netif_tx_stop_queue(nq); 838 } 839 840 return NETDEV_TX_OK; 841 } 842 843 844 /* tx napi ******************************************************************/ 845 static void txq_kick(struct tx_queue *txq) 846 { 847 struct mv643xx_eth_private *mp = txq_to_mp(txq); 848 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 849 u32 hw_desc_ptr; 850 u32 expected_ptr; 851 852 __netif_tx_lock(nq, smp_processor_id()); 853 854 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index)) 855 goto out; 856 857 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index)); 858 expected_ptr = (u32)txq->tx_desc_dma + 859 txq->tx_curr_desc * sizeof(struct tx_desc); 860 861 if (hw_desc_ptr != expected_ptr) 862 txq_enable(txq); 863 864 out: 865 __netif_tx_unlock(nq); 866 867 mp->work_tx_end &= ~(1 << txq->index); 868 } 869 870 static int txq_reclaim(struct tx_queue *txq, int budget, int force) 871 { 872 struct mv643xx_eth_private *mp = txq_to_mp(txq); 873 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 874 int reclaimed; 875 876 __netif_tx_lock_bh(nq); 877 878 reclaimed = 0; 879 while (reclaimed < budget && txq->tx_desc_count > 0) { 880 int tx_index; 881 struct tx_desc *desc; 882 u32 cmd_sts; 883 struct sk_buff *skb; 884 885 tx_index = txq->tx_used_desc; 886 desc = &txq->tx_desc_area[tx_index]; 887 cmd_sts = desc->cmd_sts; 888 889 if (cmd_sts & BUFFER_OWNED_BY_DMA) { 890 if (!force) 891 break; 892 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA; 893 } 894 895 txq->tx_used_desc = tx_index + 1; 896 if (txq->tx_used_desc == txq->tx_ring_size) 897 txq->tx_used_desc = 0; 898 899 reclaimed++; 900 txq->tx_desc_count--; 901 902 skb = NULL; 903 if (cmd_sts & TX_LAST_DESC) 904 skb = __skb_dequeue(&txq->tx_skb); 905 906 if (cmd_sts & ERROR_SUMMARY) { 907 netdev_info(mp->dev, "tx error\n"); 908 mp->dev->stats.tx_errors++; 909 } 910 911 if (cmd_sts & TX_FIRST_DESC) { 912 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr, 913 desc->byte_cnt, DMA_TO_DEVICE); 914 } else { 915 dma_unmap_page(mp->dev->dev.parent, desc->buf_ptr, 916 desc->byte_cnt, DMA_TO_DEVICE); 917 } 918 919 dev_kfree_skb(skb); 920 } 921 922 __netif_tx_unlock_bh(nq); 923 924 if (reclaimed < budget) 925 mp->work_tx &= ~(1 << txq->index); 926 927 return reclaimed; 928 } 929 930 931 /* tx rate control **********************************************************/ 932 /* 933 * Set total maximum TX rate (shared by all TX queues for this port) 934 * to 'rate' bits per second, with a maximum burst of 'burst' bytes. 935 */ 936 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst) 937 { 938 int token_rate; 939 int mtu; 940 int bucket_size; 941 942 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 943 if (token_rate > 1023) 944 token_rate = 1023; 945 946 mtu = (mp->dev->mtu + 255) >> 8; 947 if (mtu > 63) 948 mtu = 63; 949 950 bucket_size = (burst + 255) >> 8; 951 if (bucket_size > 65535) 952 bucket_size = 65535; 953 954 switch (mp->shared->tx_bw_control) { 955 case TX_BW_CONTROL_OLD_LAYOUT: 956 wrlp(mp, TX_BW_RATE, token_rate); 957 wrlp(mp, TX_BW_MTU, mtu); 958 wrlp(mp, TX_BW_BURST, bucket_size); 959 break; 960 case TX_BW_CONTROL_NEW_LAYOUT: 961 wrlp(mp, TX_BW_RATE_MOVED, token_rate); 962 wrlp(mp, TX_BW_MTU_MOVED, mtu); 963 wrlp(mp, TX_BW_BURST_MOVED, bucket_size); 964 break; 965 } 966 } 967 968 static void txq_set_rate(struct tx_queue *txq, int rate, int burst) 969 { 970 struct mv643xx_eth_private *mp = txq_to_mp(txq); 971 int token_rate; 972 int bucket_size; 973 974 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 975 if (token_rate > 1023) 976 token_rate = 1023; 977 978 bucket_size = (burst + 255) >> 8; 979 if (bucket_size > 65535) 980 bucket_size = 65535; 981 982 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14); 983 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate); 984 } 985 986 static void txq_set_fixed_prio_mode(struct tx_queue *txq) 987 { 988 struct mv643xx_eth_private *mp = txq_to_mp(txq); 989 int off; 990 u32 val; 991 992 /* 993 * Turn on fixed priority mode. 994 */ 995 off = 0; 996 switch (mp->shared->tx_bw_control) { 997 case TX_BW_CONTROL_OLD_LAYOUT: 998 off = TXQ_FIX_PRIO_CONF; 999 break; 1000 case TX_BW_CONTROL_NEW_LAYOUT: 1001 off = TXQ_FIX_PRIO_CONF_MOVED; 1002 break; 1003 } 1004 1005 if (off) { 1006 val = rdlp(mp, off); 1007 val |= 1 << txq->index; 1008 wrlp(mp, off, val); 1009 } 1010 } 1011 1012 1013 /* mii management interface *************************************************/ 1014 static void mv643xx_adjust_pscr(struct mv643xx_eth_private *mp) 1015 { 1016 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 1017 u32 autoneg_disable = FORCE_LINK_PASS | 1018 DISABLE_AUTO_NEG_SPEED_GMII | 1019 DISABLE_AUTO_NEG_FOR_FLOW_CTRL | 1020 DISABLE_AUTO_NEG_FOR_DUPLEX; 1021 1022 if (mp->phy->autoneg == AUTONEG_ENABLE) { 1023 /* enable auto negotiation */ 1024 pscr &= ~autoneg_disable; 1025 goto out_write; 1026 } 1027 1028 pscr |= autoneg_disable; 1029 1030 if (mp->phy->speed == SPEED_1000) { 1031 /* force gigabit, half duplex not supported */ 1032 pscr |= SET_GMII_SPEED_TO_1000; 1033 pscr |= SET_FULL_DUPLEX_MODE; 1034 goto out_write; 1035 } 1036 1037 pscr &= ~SET_GMII_SPEED_TO_1000; 1038 1039 if (mp->phy->speed == SPEED_100) 1040 pscr |= SET_MII_SPEED_TO_100; 1041 else 1042 pscr &= ~SET_MII_SPEED_TO_100; 1043 1044 if (mp->phy->duplex == DUPLEX_FULL) 1045 pscr |= SET_FULL_DUPLEX_MODE; 1046 else 1047 pscr &= ~SET_FULL_DUPLEX_MODE; 1048 1049 out_write: 1050 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 1051 } 1052 1053 /* statistics ***************************************************************/ 1054 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) 1055 { 1056 struct mv643xx_eth_private *mp = netdev_priv(dev); 1057 struct net_device_stats *stats = &dev->stats; 1058 unsigned long tx_packets = 0; 1059 unsigned long tx_bytes = 0; 1060 unsigned long tx_dropped = 0; 1061 int i; 1062 1063 for (i = 0; i < mp->txq_count; i++) { 1064 struct tx_queue *txq = mp->txq + i; 1065 1066 tx_packets += txq->tx_packets; 1067 tx_bytes += txq->tx_bytes; 1068 tx_dropped += txq->tx_dropped; 1069 } 1070 1071 stats->tx_packets = tx_packets; 1072 stats->tx_bytes = tx_bytes; 1073 stats->tx_dropped = tx_dropped; 1074 1075 return stats; 1076 } 1077 1078 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset) 1079 { 1080 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset); 1081 } 1082 1083 static void mib_counters_clear(struct mv643xx_eth_private *mp) 1084 { 1085 int i; 1086 1087 for (i = 0; i < 0x80; i += 4) 1088 mib_read(mp, i); 1089 1090 /* Clear non MIB hw counters also */ 1091 rdlp(mp, RX_DISCARD_FRAME_CNT); 1092 rdlp(mp, RX_OVERRUN_FRAME_CNT); 1093 } 1094 1095 static void mib_counters_update(struct mv643xx_eth_private *mp) 1096 { 1097 struct mib_counters *p = &mp->mib_counters; 1098 1099 spin_lock_bh(&mp->mib_counters_lock); 1100 p->good_octets_received += mib_read(mp, 0x00); 1101 p->bad_octets_received += mib_read(mp, 0x08); 1102 p->internal_mac_transmit_err += mib_read(mp, 0x0c); 1103 p->good_frames_received += mib_read(mp, 0x10); 1104 p->bad_frames_received += mib_read(mp, 0x14); 1105 p->broadcast_frames_received += mib_read(mp, 0x18); 1106 p->multicast_frames_received += mib_read(mp, 0x1c); 1107 p->frames_64_octets += mib_read(mp, 0x20); 1108 p->frames_65_to_127_octets += mib_read(mp, 0x24); 1109 p->frames_128_to_255_octets += mib_read(mp, 0x28); 1110 p->frames_256_to_511_octets += mib_read(mp, 0x2c); 1111 p->frames_512_to_1023_octets += mib_read(mp, 0x30); 1112 p->frames_1024_to_max_octets += mib_read(mp, 0x34); 1113 p->good_octets_sent += mib_read(mp, 0x38); 1114 p->good_frames_sent += mib_read(mp, 0x40); 1115 p->excessive_collision += mib_read(mp, 0x44); 1116 p->multicast_frames_sent += mib_read(mp, 0x48); 1117 p->broadcast_frames_sent += mib_read(mp, 0x4c); 1118 p->unrec_mac_control_received += mib_read(mp, 0x50); 1119 p->fc_sent += mib_read(mp, 0x54); 1120 p->good_fc_received += mib_read(mp, 0x58); 1121 p->bad_fc_received += mib_read(mp, 0x5c); 1122 p->undersize_received += mib_read(mp, 0x60); 1123 p->fragments_received += mib_read(mp, 0x64); 1124 p->oversize_received += mib_read(mp, 0x68); 1125 p->jabber_received += mib_read(mp, 0x6c); 1126 p->mac_receive_error += mib_read(mp, 0x70); 1127 p->bad_crc_event += mib_read(mp, 0x74); 1128 p->collision += mib_read(mp, 0x78); 1129 p->late_collision += mib_read(mp, 0x7c); 1130 /* Non MIB hardware counters */ 1131 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT); 1132 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT); 1133 spin_unlock_bh(&mp->mib_counters_lock); 1134 } 1135 1136 static void mib_counters_timer_wrapper(unsigned long _mp) 1137 { 1138 struct mv643xx_eth_private *mp = (void *)_mp; 1139 mib_counters_update(mp); 1140 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); 1141 } 1142 1143 1144 /* interrupt coalescing *****************************************************/ 1145 /* 1146 * Hardware coalescing parameters are set in units of 64 t_clk 1147 * cycles. I.e.: 1148 * 1149 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate 1150 * 1151 * register_value = coal_delay_in_usec * t_clk_rate / 64000000 1152 * 1153 * In the ->set*() methods, we round the computed register value 1154 * to the nearest integer. 1155 */ 1156 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp) 1157 { 1158 u32 val = rdlp(mp, SDMA_CONFIG); 1159 u64 temp; 1160 1161 if (mp->shared->extended_rx_coal_limit) 1162 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7); 1163 else 1164 temp = (val & 0x003fff00) >> 8; 1165 1166 temp *= 64000000; 1167 do_div(temp, mp->t_clk); 1168 1169 return (unsigned int)temp; 1170 } 1171 1172 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1173 { 1174 u64 temp; 1175 u32 val; 1176 1177 temp = (u64)usec * mp->t_clk; 1178 temp += 31999999; 1179 do_div(temp, 64000000); 1180 1181 val = rdlp(mp, SDMA_CONFIG); 1182 if (mp->shared->extended_rx_coal_limit) { 1183 if (temp > 0xffff) 1184 temp = 0xffff; 1185 val &= ~0x023fff80; 1186 val |= (temp & 0x8000) << 10; 1187 val |= (temp & 0x7fff) << 7; 1188 } else { 1189 if (temp > 0x3fff) 1190 temp = 0x3fff; 1191 val &= ~0x003fff00; 1192 val |= (temp & 0x3fff) << 8; 1193 } 1194 wrlp(mp, SDMA_CONFIG, val); 1195 } 1196 1197 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) 1198 { 1199 u64 temp; 1200 1201 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; 1202 temp *= 64000000; 1203 do_div(temp, mp->t_clk); 1204 1205 return (unsigned int)temp; 1206 } 1207 1208 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1209 { 1210 u64 temp; 1211 1212 temp = (u64)usec * mp->t_clk; 1213 temp += 31999999; 1214 do_div(temp, 64000000); 1215 1216 if (temp > 0x3fff) 1217 temp = 0x3fff; 1218 1219 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); 1220 } 1221 1222 1223 /* ethtool ******************************************************************/ 1224 struct mv643xx_eth_stats { 1225 char stat_string[ETH_GSTRING_LEN]; 1226 int sizeof_stat; 1227 int netdev_off; 1228 int mp_off; 1229 }; 1230 1231 #define SSTAT(m) \ 1232 { #m, FIELD_SIZEOF(struct net_device_stats, m), \ 1233 offsetof(struct net_device, stats.m), -1 } 1234 1235 #define MIBSTAT(m) \ 1236 { #m, FIELD_SIZEOF(struct mib_counters, m), \ 1237 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } 1238 1239 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = { 1240 SSTAT(rx_packets), 1241 SSTAT(tx_packets), 1242 SSTAT(rx_bytes), 1243 SSTAT(tx_bytes), 1244 SSTAT(rx_errors), 1245 SSTAT(tx_errors), 1246 SSTAT(rx_dropped), 1247 SSTAT(tx_dropped), 1248 MIBSTAT(good_octets_received), 1249 MIBSTAT(bad_octets_received), 1250 MIBSTAT(internal_mac_transmit_err), 1251 MIBSTAT(good_frames_received), 1252 MIBSTAT(bad_frames_received), 1253 MIBSTAT(broadcast_frames_received), 1254 MIBSTAT(multicast_frames_received), 1255 MIBSTAT(frames_64_octets), 1256 MIBSTAT(frames_65_to_127_octets), 1257 MIBSTAT(frames_128_to_255_octets), 1258 MIBSTAT(frames_256_to_511_octets), 1259 MIBSTAT(frames_512_to_1023_octets), 1260 MIBSTAT(frames_1024_to_max_octets), 1261 MIBSTAT(good_octets_sent), 1262 MIBSTAT(good_frames_sent), 1263 MIBSTAT(excessive_collision), 1264 MIBSTAT(multicast_frames_sent), 1265 MIBSTAT(broadcast_frames_sent), 1266 MIBSTAT(unrec_mac_control_received), 1267 MIBSTAT(fc_sent), 1268 MIBSTAT(good_fc_received), 1269 MIBSTAT(bad_fc_received), 1270 MIBSTAT(undersize_received), 1271 MIBSTAT(fragments_received), 1272 MIBSTAT(oversize_received), 1273 MIBSTAT(jabber_received), 1274 MIBSTAT(mac_receive_error), 1275 MIBSTAT(bad_crc_event), 1276 MIBSTAT(collision), 1277 MIBSTAT(late_collision), 1278 MIBSTAT(rx_discard), 1279 MIBSTAT(rx_overrun), 1280 }; 1281 1282 static int 1283 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp, 1284 struct ethtool_cmd *cmd) 1285 { 1286 int err; 1287 1288 err = phy_read_status(mp->phy); 1289 if (err == 0) 1290 err = phy_ethtool_gset(mp->phy, cmd); 1291 1292 /* 1293 * The MAC does not support 1000baseT_Half. 1294 */ 1295 cmd->supported &= ~SUPPORTED_1000baseT_Half; 1296 cmd->advertising &= ~ADVERTISED_1000baseT_Half; 1297 1298 return err; 1299 } 1300 1301 static int 1302 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp, 1303 struct ethtool_cmd *cmd) 1304 { 1305 u32 port_status; 1306 1307 port_status = rdlp(mp, PORT_STATUS); 1308 1309 cmd->supported = SUPPORTED_MII; 1310 cmd->advertising = ADVERTISED_MII; 1311 switch (port_status & PORT_SPEED_MASK) { 1312 case PORT_SPEED_10: 1313 ethtool_cmd_speed_set(cmd, SPEED_10); 1314 break; 1315 case PORT_SPEED_100: 1316 ethtool_cmd_speed_set(cmd, SPEED_100); 1317 break; 1318 case PORT_SPEED_1000: 1319 ethtool_cmd_speed_set(cmd, SPEED_1000); 1320 break; 1321 default: 1322 cmd->speed = -1; 1323 break; 1324 } 1325 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF; 1326 cmd->port = PORT_MII; 1327 cmd->phy_address = 0; 1328 cmd->transceiver = XCVR_INTERNAL; 1329 cmd->autoneg = AUTONEG_DISABLE; 1330 cmd->maxtxpkt = 1; 1331 cmd->maxrxpkt = 1; 1332 1333 return 0; 1334 } 1335 1336 static void 1337 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1338 { 1339 struct mv643xx_eth_private *mp = netdev_priv(dev); 1340 wol->supported = 0; 1341 wol->wolopts = 0; 1342 if (mp->phy) 1343 phy_ethtool_get_wol(mp->phy, wol); 1344 } 1345 1346 static int 1347 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1348 { 1349 struct mv643xx_eth_private *mp = netdev_priv(dev); 1350 int err; 1351 1352 if (mp->phy == NULL) 1353 return -EOPNOTSUPP; 1354 1355 err = phy_ethtool_set_wol(mp->phy, wol); 1356 /* Given that mv643xx_eth works without the marvell-specific PHY driver, 1357 * this debugging hint is useful to have. 1358 */ 1359 if (err == -EOPNOTSUPP) 1360 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n"); 1361 return err; 1362 } 1363 1364 static int 1365 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 1366 { 1367 struct mv643xx_eth_private *mp = netdev_priv(dev); 1368 1369 if (mp->phy != NULL) 1370 return mv643xx_eth_get_settings_phy(mp, cmd); 1371 else 1372 return mv643xx_eth_get_settings_phyless(mp, cmd); 1373 } 1374 1375 static int 1376 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 1377 { 1378 struct mv643xx_eth_private *mp = netdev_priv(dev); 1379 int ret; 1380 1381 if (mp->phy == NULL) 1382 return -EINVAL; 1383 1384 /* 1385 * The MAC does not support 1000baseT_Half. 1386 */ 1387 cmd->advertising &= ~ADVERTISED_1000baseT_Half; 1388 1389 ret = phy_ethtool_sset(mp->phy, cmd); 1390 if (!ret) 1391 mv643xx_adjust_pscr(mp); 1392 return ret; 1393 } 1394 1395 static void mv643xx_eth_get_drvinfo(struct net_device *dev, 1396 struct ethtool_drvinfo *drvinfo) 1397 { 1398 strlcpy(drvinfo->driver, mv643xx_eth_driver_name, 1399 sizeof(drvinfo->driver)); 1400 strlcpy(drvinfo->version, mv643xx_eth_driver_version, 1401 sizeof(drvinfo->version)); 1402 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 1403 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 1404 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats); 1405 } 1406 1407 static int mv643xx_eth_nway_reset(struct net_device *dev) 1408 { 1409 struct mv643xx_eth_private *mp = netdev_priv(dev); 1410 1411 if (mp->phy == NULL) 1412 return -EINVAL; 1413 1414 return genphy_restart_aneg(mp->phy); 1415 } 1416 1417 static int 1418 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1419 { 1420 struct mv643xx_eth_private *mp = netdev_priv(dev); 1421 1422 ec->rx_coalesce_usecs = get_rx_coal(mp); 1423 ec->tx_coalesce_usecs = get_tx_coal(mp); 1424 1425 return 0; 1426 } 1427 1428 static int 1429 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1430 { 1431 struct mv643xx_eth_private *mp = netdev_priv(dev); 1432 1433 set_rx_coal(mp, ec->rx_coalesce_usecs); 1434 set_tx_coal(mp, ec->tx_coalesce_usecs); 1435 1436 return 0; 1437 } 1438 1439 static void 1440 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1441 { 1442 struct mv643xx_eth_private *mp = netdev_priv(dev); 1443 1444 er->rx_max_pending = 4096; 1445 er->tx_max_pending = 4096; 1446 1447 er->rx_pending = mp->rx_ring_size; 1448 er->tx_pending = mp->tx_ring_size; 1449 } 1450 1451 static int 1452 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1453 { 1454 struct mv643xx_eth_private *mp = netdev_priv(dev); 1455 1456 if (er->rx_mini_pending || er->rx_jumbo_pending) 1457 return -EINVAL; 1458 1459 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096; 1460 mp->tx_ring_size = er->tx_pending < 4096 ? er->tx_pending : 4096; 1461 1462 if (netif_running(dev)) { 1463 mv643xx_eth_stop(dev); 1464 if (mv643xx_eth_open(dev)) { 1465 netdev_err(dev, 1466 "fatal error on re-opening device after ring param change\n"); 1467 return -ENOMEM; 1468 } 1469 } 1470 1471 return 0; 1472 } 1473 1474 1475 static int 1476 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) 1477 { 1478 struct mv643xx_eth_private *mp = netdev_priv(dev); 1479 bool rx_csum = features & NETIF_F_RXCSUM; 1480 1481 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); 1482 1483 return 0; 1484 } 1485 1486 static void mv643xx_eth_get_strings(struct net_device *dev, 1487 uint32_t stringset, uint8_t *data) 1488 { 1489 int i; 1490 1491 if (stringset == ETH_SS_STATS) { 1492 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1493 memcpy(data + i * ETH_GSTRING_LEN, 1494 mv643xx_eth_stats[i].stat_string, 1495 ETH_GSTRING_LEN); 1496 } 1497 } 1498 } 1499 1500 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, 1501 struct ethtool_stats *stats, 1502 uint64_t *data) 1503 { 1504 struct mv643xx_eth_private *mp = netdev_priv(dev); 1505 int i; 1506 1507 mv643xx_eth_get_stats(dev); 1508 mib_counters_update(mp); 1509 1510 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1511 const struct mv643xx_eth_stats *stat; 1512 void *p; 1513 1514 stat = mv643xx_eth_stats + i; 1515 1516 if (stat->netdev_off >= 0) 1517 p = ((void *)mp->dev) + stat->netdev_off; 1518 else 1519 p = ((void *)mp) + stat->mp_off; 1520 1521 data[i] = (stat->sizeof_stat == 8) ? 1522 *(uint64_t *)p : *(uint32_t *)p; 1523 } 1524 } 1525 1526 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset) 1527 { 1528 if (sset == ETH_SS_STATS) 1529 return ARRAY_SIZE(mv643xx_eth_stats); 1530 1531 return -EOPNOTSUPP; 1532 } 1533 1534 static const struct ethtool_ops mv643xx_eth_ethtool_ops = { 1535 .get_settings = mv643xx_eth_get_settings, 1536 .set_settings = mv643xx_eth_set_settings, 1537 .get_drvinfo = mv643xx_eth_get_drvinfo, 1538 .nway_reset = mv643xx_eth_nway_reset, 1539 .get_link = ethtool_op_get_link, 1540 .get_coalesce = mv643xx_eth_get_coalesce, 1541 .set_coalesce = mv643xx_eth_set_coalesce, 1542 .get_ringparam = mv643xx_eth_get_ringparam, 1543 .set_ringparam = mv643xx_eth_set_ringparam, 1544 .get_strings = mv643xx_eth_get_strings, 1545 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, 1546 .get_sset_count = mv643xx_eth_get_sset_count, 1547 .get_ts_info = ethtool_op_get_ts_info, 1548 .get_wol = mv643xx_eth_get_wol, 1549 .set_wol = mv643xx_eth_set_wol, 1550 }; 1551 1552 1553 /* address handling *********************************************************/ 1554 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr) 1555 { 1556 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH); 1557 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW); 1558 1559 addr[0] = (mac_h >> 24) & 0xff; 1560 addr[1] = (mac_h >> 16) & 0xff; 1561 addr[2] = (mac_h >> 8) & 0xff; 1562 addr[3] = mac_h & 0xff; 1563 addr[4] = (mac_l >> 8) & 0xff; 1564 addr[5] = mac_l & 0xff; 1565 } 1566 1567 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr) 1568 { 1569 wrlp(mp, MAC_ADDR_HIGH, 1570 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); 1571 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]); 1572 } 1573 1574 static u32 uc_addr_filter_mask(struct net_device *dev) 1575 { 1576 struct netdev_hw_addr *ha; 1577 u32 nibbles; 1578 1579 if (dev->flags & IFF_PROMISC) 1580 return 0; 1581 1582 nibbles = 1 << (dev->dev_addr[5] & 0x0f); 1583 netdev_for_each_uc_addr(ha, dev) { 1584 if (memcmp(dev->dev_addr, ha->addr, 5)) 1585 return 0; 1586 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) 1587 return 0; 1588 1589 nibbles |= 1 << (ha->addr[5] & 0x0f); 1590 } 1591 1592 return nibbles; 1593 } 1594 1595 static void mv643xx_eth_program_unicast_filter(struct net_device *dev) 1596 { 1597 struct mv643xx_eth_private *mp = netdev_priv(dev); 1598 u32 port_config; 1599 u32 nibbles; 1600 int i; 1601 1602 uc_addr_set(mp, dev->dev_addr); 1603 1604 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; 1605 1606 nibbles = uc_addr_filter_mask(dev); 1607 if (!nibbles) { 1608 port_config |= UNICAST_PROMISCUOUS_MODE; 1609 nibbles = 0xffff; 1610 } 1611 1612 for (i = 0; i < 16; i += 4) { 1613 int off = UNICAST_TABLE(mp->port_num) + i; 1614 u32 v; 1615 1616 v = 0; 1617 if (nibbles & 1) 1618 v |= 0x00000001; 1619 if (nibbles & 2) 1620 v |= 0x00000100; 1621 if (nibbles & 4) 1622 v |= 0x00010000; 1623 if (nibbles & 8) 1624 v |= 0x01000000; 1625 nibbles >>= 4; 1626 1627 wrl(mp, off, v); 1628 } 1629 1630 wrlp(mp, PORT_CONFIG, port_config); 1631 } 1632 1633 static int addr_crc(unsigned char *addr) 1634 { 1635 int crc = 0; 1636 int i; 1637 1638 for (i = 0; i < 6; i++) { 1639 int j; 1640 1641 crc = (crc ^ addr[i]) << 8; 1642 for (j = 7; j >= 0; j--) { 1643 if (crc & (0x100 << j)) 1644 crc ^= 0x107 << j; 1645 } 1646 } 1647 1648 return crc; 1649 } 1650 1651 static void mv643xx_eth_program_multicast_filter(struct net_device *dev) 1652 { 1653 struct mv643xx_eth_private *mp = netdev_priv(dev); 1654 u32 *mc_spec; 1655 u32 *mc_other; 1656 struct netdev_hw_addr *ha; 1657 int i; 1658 1659 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { 1660 int port_num; 1661 u32 accept; 1662 1663 oom: 1664 port_num = mp->port_num; 1665 accept = 0x01010101; 1666 for (i = 0; i < 0x100; i += 4) { 1667 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept); 1668 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept); 1669 } 1670 return; 1671 } 1672 1673 mc_spec = kmalloc(0x200, GFP_ATOMIC); 1674 if (mc_spec == NULL) 1675 goto oom; 1676 mc_other = mc_spec + (0x100 >> 2); 1677 1678 memset(mc_spec, 0, 0x100); 1679 memset(mc_other, 0, 0x100); 1680 1681 netdev_for_each_mc_addr(ha, dev) { 1682 u8 *a = ha->addr; 1683 u32 *table; 1684 int entry; 1685 1686 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { 1687 table = mc_spec; 1688 entry = a[5]; 1689 } else { 1690 table = mc_other; 1691 entry = addr_crc(a); 1692 } 1693 1694 table[entry >> 2] |= 1 << (8 * (entry & 3)); 1695 } 1696 1697 for (i = 0; i < 0x100; i += 4) { 1698 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]); 1699 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]); 1700 } 1701 1702 kfree(mc_spec); 1703 } 1704 1705 static void mv643xx_eth_set_rx_mode(struct net_device *dev) 1706 { 1707 mv643xx_eth_program_unicast_filter(dev); 1708 mv643xx_eth_program_multicast_filter(dev); 1709 } 1710 1711 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) 1712 { 1713 struct sockaddr *sa = addr; 1714 1715 if (!is_valid_ether_addr(sa->sa_data)) 1716 return -EADDRNOTAVAIL; 1717 1718 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); 1719 1720 netif_addr_lock_bh(dev); 1721 mv643xx_eth_program_unicast_filter(dev); 1722 netif_addr_unlock_bh(dev); 1723 1724 return 0; 1725 } 1726 1727 1728 /* rx/tx queue initialisation ***********************************************/ 1729 static int rxq_init(struct mv643xx_eth_private *mp, int index) 1730 { 1731 struct rx_queue *rxq = mp->rxq + index; 1732 struct rx_desc *rx_desc; 1733 int size; 1734 int i; 1735 1736 rxq->index = index; 1737 1738 rxq->rx_ring_size = mp->rx_ring_size; 1739 1740 rxq->rx_desc_count = 0; 1741 rxq->rx_curr_desc = 0; 1742 rxq->rx_used_desc = 0; 1743 1744 size = rxq->rx_ring_size * sizeof(struct rx_desc); 1745 1746 if (index == 0 && size <= mp->rx_desc_sram_size) { 1747 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr, 1748 mp->rx_desc_sram_size); 1749 rxq->rx_desc_dma = mp->rx_desc_sram_addr; 1750 } else { 1751 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1752 size, &rxq->rx_desc_dma, 1753 GFP_KERNEL); 1754 } 1755 1756 if (rxq->rx_desc_area == NULL) { 1757 netdev_err(mp->dev, 1758 "can't allocate rx ring (%d bytes)\n", size); 1759 goto out; 1760 } 1761 memset(rxq->rx_desc_area, 0, size); 1762 1763 rxq->rx_desc_area_size = size; 1764 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb), 1765 GFP_KERNEL); 1766 if (rxq->rx_skb == NULL) 1767 goto out_free; 1768 1769 rx_desc = rxq->rx_desc_area; 1770 for (i = 0; i < rxq->rx_ring_size; i++) { 1771 int nexti; 1772 1773 nexti = i + 1; 1774 if (nexti == rxq->rx_ring_size) 1775 nexti = 0; 1776 1777 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma + 1778 nexti * sizeof(struct rx_desc); 1779 } 1780 1781 return 0; 1782 1783 1784 out_free: 1785 if (index == 0 && size <= mp->rx_desc_sram_size) 1786 iounmap(rxq->rx_desc_area); 1787 else 1788 dma_free_coherent(mp->dev->dev.parent, size, 1789 rxq->rx_desc_area, 1790 rxq->rx_desc_dma); 1791 1792 out: 1793 return -ENOMEM; 1794 } 1795 1796 static void rxq_deinit(struct rx_queue *rxq) 1797 { 1798 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 1799 int i; 1800 1801 rxq_disable(rxq); 1802 1803 for (i = 0; i < rxq->rx_ring_size; i++) { 1804 if (rxq->rx_skb[i]) { 1805 dev_kfree_skb(rxq->rx_skb[i]); 1806 rxq->rx_desc_count--; 1807 } 1808 } 1809 1810 if (rxq->rx_desc_count) { 1811 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n", 1812 rxq->rx_desc_count); 1813 } 1814 1815 if (rxq->index == 0 && 1816 rxq->rx_desc_area_size <= mp->rx_desc_sram_size) 1817 iounmap(rxq->rx_desc_area); 1818 else 1819 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, 1820 rxq->rx_desc_area, rxq->rx_desc_dma); 1821 1822 kfree(rxq->rx_skb); 1823 } 1824 1825 static int txq_init(struct mv643xx_eth_private *mp, int index) 1826 { 1827 struct tx_queue *txq = mp->txq + index; 1828 struct tx_desc *tx_desc; 1829 int size; 1830 int i; 1831 1832 txq->index = index; 1833 1834 txq->tx_ring_size = mp->tx_ring_size; 1835 1836 txq->tx_desc_count = 0; 1837 txq->tx_curr_desc = 0; 1838 txq->tx_used_desc = 0; 1839 1840 size = txq->tx_ring_size * sizeof(struct tx_desc); 1841 1842 if (index == 0 && size <= mp->tx_desc_sram_size) { 1843 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, 1844 mp->tx_desc_sram_size); 1845 txq->tx_desc_dma = mp->tx_desc_sram_addr; 1846 } else { 1847 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1848 size, &txq->tx_desc_dma, 1849 GFP_KERNEL); 1850 } 1851 1852 if (txq->tx_desc_area == NULL) { 1853 netdev_err(mp->dev, 1854 "can't allocate tx ring (%d bytes)\n", size); 1855 return -ENOMEM; 1856 } 1857 memset(txq->tx_desc_area, 0, size); 1858 1859 txq->tx_desc_area_size = size; 1860 1861 tx_desc = txq->tx_desc_area; 1862 for (i = 0; i < txq->tx_ring_size; i++) { 1863 struct tx_desc *txd = tx_desc + i; 1864 int nexti; 1865 1866 nexti = i + 1; 1867 if (nexti == txq->tx_ring_size) 1868 nexti = 0; 1869 1870 txd->cmd_sts = 0; 1871 txd->next_desc_ptr = txq->tx_desc_dma + 1872 nexti * sizeof(struct tx_desc); 1873 } 1874 1875 skb_queue_head_init(&txq->tx_skb); 1876 1877 return 0; 1878 } 1879 1880 static void txq_deinit(struct tx_queue *txq) 1881 { 1882 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1883 1884 txq_disable(txq); 1885 txq_reclaim(txq, txq->tx_ring_size, 1); 1886 1887 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); 1888 1889 if (txq->index == 0 && 1890 txq->tx_desc_area_size <= mp->tx_desc_sram_size) 1891 iounmap(txq->tx_desc_area); 1892 else 1893 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 1894 txq->tx_desc_area, txq->tx_desc_dma); 1895 } 1896 1897 1898 /* netdev ops and related ***************************************************/ 1899 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) 1900 { 1901 u32 int_cause; 1902 u32 int_cause_ext; 1903 1904 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; 1905 if (int_cause == 0) 1906 return 0; 1907 1908 int_cause_ext = 0; 1909 if (int_cause & INT_EXT) { 1910 int_cause &= ~INT_EXT; 1911 int_cause_ext = rdlp(mp, INT_CAUSE_EXT); 1912 } 1913 1914 if (int_cause) { 1915 wrlp(mp, INT_CAUSE, ~int_cause); 1916 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & 1917 ~(rdlp(mp, TXQ_COMMAND) & 0xff); 1918 mp->work_rx |= (int_cause & INT_RX) >> 2; 1919 } 1920 1921 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; 1922 if (int_cause_ext) { 1923 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); 1924 if (int_cause_ext & INT_EXT_LINK_PHY) 1925 mp->work_link = 1; 1926 mp->work_tx |= int_cause_ext & INT_EXT_TX; 1927 } 1928 1929 return 1; 1930 } 1931 1932 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) 1933 { 1934 struct net_device *dev = (struct net_device *)dev_id; 1935 struct mv643xx_eth_private *mp = netdev_priv(dev); 1936 1937 if (unlikely(!mv643xx_eth_collect_events(mp))) 1938 return IRQ_NONE; 1939 1940 wrlp(mp, INT_MASK, 0); 1941 napi_schedule(&mp->napi); 1942 1943 return IRQ_HANDLED; 1944 } 1945 1946 static void handle_link_event(struct mv643xx_eth_private *mp) 1947 { 1948 struct net_device *dev = mp->dev; 1949 u32 port_status; 1950 int speed; 1951 int duplex; 1952 int fc; 1953 1954 port_status = rdlp(mp, PORT_STATUS); 1955 if (!(port_status & LINK_UP)) { 1956 if (netif_carrier_ok(dev)) { 1957 int i; 1958 1959 netdev_info(dev, "link down\n"); 1960 1961 netif_carrier_off(dev); 1962 1963 for (i = 0; i < mp->txq_count; i++) { 1964 struct tx_queue *txq = mp->txq + i; 1965 1966 txq_reclaim(txq, txq->tx_ring_size, 1); 1967 txq_reset_hw_ptr(txq); 1968 } 1969 } 1970 return; 1971 } 1972 1973 switch (port_status & PORT_SPEED_MASK) { 1974 case PORT_SPEED_10: 1975 speed = 10; 1976 break; 1977 case PORT_SPEED_100: 1978 speed = 100; 1979 break; 1980 case PORT_SPEED_1000: 1981 speed = 1000; 1982 break; 1983 default: 1984 speed = -1; 1985 break; 1986 } 1987 duplex = (port_status & FULL_DUPLEX) ? 1 : 0; 1988 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; 1989 1990 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n", 1991 speed, duplex ? "full" : "half", fc ? "en" : "dis"); 1992 1993 if (!netif_carrier_ok(dev)) 1994 netif_carrier_on(dev); 1995 } 1996 1997 static int mv643xx_eth_poll(struct napi_struct *napi, int budget) 1998 { 1999 struct mv643xx_eth_private *mp; 2000 int work_done; 2001 2002 mp = container_of(napi, struct mv643xx_eth_private, napi); 2003 2004 if (unlikely(mp->oom)) { 2005 mp->oom = 0; 2006 del_timer(&mp->rx_oom); 2007 } 2008 2009 work_done = 0; 2010 while (work_done < budget) { 2011 u8 queue_mask; 2012 int queue; 2013 int work_tbd; 2014 2015 if (mp->work_link) { 2016 mp->work_link = 0; 2017 handle_link_event(mp); 2018 work_done++; 2019 continue; 2020 } 2021 2022 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; 2023 if (likely(!mp->oom)) 2024 queue_mask |= mp->work_rx_refill; 2025 2026 if (!queue_mask) { 2027 if (mv643xx_eth_collect_events(mp)) 2028 continue; 2029 break; 2030 } 2031 2032 queue = fls(queue_mask) - 1; 2033 queue_mask = 1 << queue; 2034 2035 work_tbd = budget - work_done; 2036 if (work_tbd > 16) 2037 work_tbd = 16; 2038 2039 if (mp->work_tx_end & queue_mask) { 2040 txq_kick(mp->txq + queue); 2041 } else if (mp->work_tx & queue_mask) { 2042 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); 2043 txq_maybe_wake(mp->txq + queue); 2044 } else if (mp->work_rx & queue_mask) { 2045 work_done += rxq_process(mp->rxq + queue, work_tbd); 2046 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { 2047 work_done += rxq_refill(mp->rxq + queue, work_tbd); 2048 } else { 2049 BUG(); 2050 } 2051 } 2052 2053 if (work_done < budget) { 2054 if (mp->oom) 2055 mod_timer(&mp->rx_oom, jiffies + (HZ / 10)); 2056 napi_complete(napi); 2057 wrlp(mp, INT_MASK, mp->int_mask); 2058 } 2059 2060 return work_done; 2061 } 2062 2063 static inline void oom_timer_wrapper(unsigned long data) 2064 { 2065 struct mv643xx_eth_private *mp = (void *)data; 2066 2067 napi_schedule(&mp->napi); 2068 } 2069 2070 static void phy_reset(struct mv643xx_eth_private *mp) 2071 { 2072 int data; 2073 2074 data = phy_read(mp->phy, MII_BMCR); 2075 if (data < 0) 2076 return; 2077 2078 data |= BMCR_RESET; 2079 if (phy_write(mp->phy, MII_BMCR, data) < 0) 2080 return; 2081 2082 do { 2083 data = phy_read(mp->phy, MII_BMCR); 2084 } while (data >= 0 && data & BMCR_RESET); 2085 } 2086 2087 static void port_start(struct mv643xx_eth_private *mp) 2088 { 2089 u32 pscr; 2090 int i; 2091 2092 /* 2093 * Perform PHY reset, if there is a PHY. 2094 */ 2095 if (mp->phy != NULL) { 2096 struct ethtool_cmd cmd; 2097 2098 mv643xx_eth_get_settings(mp->dev, &cmd); 2099 phy_reset(mp); 2100 mv643xx_eth_set_settings(mp->dev, &cmd); 2101 } 2102 2103 /* 2104 * Configure basic link parameters. 2105 */ 2106 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2107 2108 pscr |= SERIAL_PORT_ENABLE; 2109 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2110 2111 pscr |= DO_NOT_FORCE_LINK_FAIL; 2112 if (mp->phy == NULL) 2113 pscr |= FORCE_LINK_PASS; 2114 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2115 2116 /* 2117 * Configure TX path and queues. 2118 */ 2119 tx_set_rate(mp, 1000000000, 16777216); 2120 for (i = 0; i < mp->txq_count; i++) { 2121 struct tx_queue *txq = mp->txq + i; 2122 2123 txq_reset_hw_ptr(txq); 2124 txq_set_rate(txq, 1000000000, 16777216); 2125 txq_set_fixed_prio_mode(txq); 2126 } 2127 2128 /* 2129 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast 2130 * frames to RX queue #0, and include the pseudo-header when 2131 * calculating receive checksums. 2132 */ 2133 mv643xx_eth_set_features(mp->dev, mp->dev->features); 2134 2135 /* 2136 * Treat BPDUs as normal multicasts, and disable partition mode. 2137 */ 2138 wrlp(mp, PORT_CONFIG_EXT, 0x00000000); 2139 2140 /* 2141 * Add configured unicast addresses to address filter table. 2142 */ 2143 mv643xx_eth_program_unicast_filter(mp->dev); 2144 2145 /* 2146 * Enable the receive queues. 2147 */ 2148 for (i = 0; i < mp->rxq_count; i++) { 2149 struct rx_queue *rxq = mp->rxq + i; 2150 u32 addr; 2151 2152 addr = (u32)rxq->rx_desc_dma; 2153 addr += rxq->rx_curr_desc * sizeof(struct rx_desc); 2154 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr); 2155 2156 rxq_enable(rxq); 2157 } 2158 } 2159 2160 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp) 2161 { 2162 int skb_size; 2163 2164 /* 2165 * Reserve 2+14 bytes for an ethernet header (the hardware 2166 * automatically prepends 2 bytes of dummy data to each 2167 * received packet), 16 bytes for up to four VLAN tags, and 2168 * 4 bytes for the trailing FCS -- 36 bytes total. 2169 */ 2170 skb_size = mp->dev->mtu + 36; 2171 2172 /* 2173 * Make sure that the skb size is a multiple of 8 bytes, as 2174 * the lower three bits of the receive descriptor's buffer 2175 * size field are ignored by the hardware. 2176 */ 2177 mp->skb_size = (skb_size + 7) & ~7; 2178 2179 /* 2180 * If NET_SKB_PAD is smaller than a cache line, 2181 * netdev_alloc_skb() will cause skb->data to be misaligned 2182 * to a cache line boundary. If this is the case, include 2183 * some extra space to allow re-aligning the data area. 2184 */ 2185 mp->skb_size += SKB_DMA_REALIGN; 2186 } 2187 2188 static int mv643xx_eth_open(struct net_device *dev) 2189 { 2190 struct mv643xx_eth_private *mp = netdev_priv(dev); 2191 int err; 2192 int i; 2193 2194 wrlp(mp, INT_CAUSE, 0); 2195 wrlp(mp, INT_CAUSE_EXT, 0); 2196 rdlp(mp, INT_CAUSE_EXT); 2197 2198 err = request_irq(dev->irq, mv643xx_eth_irq, 2199 IRQF_SHARED, dev->name, dev); 2200 if (err) { 2201 netdev_err(dev, "can't assign irq\n"); 2202 return -EAGAIN; 2203 } 2204 2205 mv643xx_eth_recalc_skb_size(mp); 2206 2207 napi_enable(&mp->napi); 2208 2209 mp->int_mask = INT_EXT; 2210 2211 for (i = 0; i < mp->rxq_count; i++) { 2212 err = rxq_init(mp, i); 2213 if (err) { 2214 while (--i >= 0) 2215 rxq_deinit(mp->rxq + i); 2216 goto out; 2217 } 2218 2219 rxq_refill(mp->rxq + i, INT_MAX); 2220 mp->int_mask |= INT_RX_0 << i; 2221 } 2222 2223 if (mp->oom) { 2224 mp->rx_oom.expires = jiffies + (HZ / 10); 2225 add_timer(&mp->rx_oom); 2226 } 2227 2228 for (i = 0; i < mp->txq_count; i++) { 2229 err = txq_init(mp, i); 2230 if (err) { 2231 while (--i >= 0) 2232 txq_deinit(mp->txq + i); 2233 goto out_free; 2234 } 2235 mp->int_mask |= INT_TX_END_0 << i; 2236 } 2237 2238 add_timer(&mp->mib_counters_timer); 2239 port_start(mp); 2240 2241 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); 2242 wrlp(mp, INT_MASK, mp->int_mask); 2243 2244 return 0; 2245 2246 2247 out_free: 2248 for (i = 0; i < mp->rxq_count; i++) 2249 rxq_deinit(mp->rxq + i); 2250 out: 2251 free_irq(dev->irq, dev); 2252 2253 return err; 2254 } 2255 2256 static void port_reset(struct mv643xx_eth_private *mp) 2257 { 2258 unsigned int data; 2259 int i; 2260 2261 for (i = 0; i < mp->rxq_count; i++) 2262 rxq_disable(mp->rxq + i); 2263 for (i = 0; i < mp->txq_count; i++) 2264 txq_disable(mp->txq + i); 2265 2266 while (1) { 2267 u32 ps = rdlp(mp, PORT_STATUS); 2268 2269 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) 2270 break; 2271 udelay(10); 2272 } 2273 2274 /* Reset the Enable bit in the Configuration Register */ 2275 data = rdlp(mp, PORT_SERIAL_CONTROL); 2276 data &= ~(SERIAL_PORT_ENABLE | 2277 DO_NOT_FORCE_LINK_FAIL | 2278 FORCE_LINK_PASS); 2279 wrlp(mp, PORT_SERIAL_CONTROL, data); 2280 } 2281 2282 static int mv643xx_eth_stop(struct net_device *dev) 2283 { 2284 struct mv643xx_eth_private *mp = netdev_priv(dev); 2285 int i; 2286 2287 wrlp(mp, INT_MASK_EXT, 0x00000000); 2288 wrlp(mp, INT_MASK, 0x00000000); 2289 rdlp(mp, INT_MASK); 2290 2291 napi_disable(&mp->napi); 2292 2293 del_timer_sync(&mp->rx_oom); 2294 2295 netif_carrier_off(dev); 2296 2297 free_irq(dev->irq, dev); 2298 2299 port_reset(mp); 2300 mv643xx_eth_get_stats(dev); 2301 mib_counters_update(mp); 2302 del_timer_sync(&mp->mib_counters_timer); 2303 2304 for (i = 0; i < mp->rxq_count; i++) 2305 rxq_deinit(mp->rxq + i); 2306 for (i = 0; i < mp->txq_count; i++) 2307 txq_deinit(mp->txq + i); 2308 2309 return 0; 2310 } 2311 2312 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2313 { 2314 struct mv643xx_eth_private *mp = netdev_priv(dev); 2315 int ret; 2316 2317 if (mp->phy == NULL) 2318 return -ENOTSUPP; 2319 2320 ret = phy_mii_ioctl(mp->phy, ifr, cmd); 2321 if (!ret) 2322 mv643xx_adjust_pscr(mp); 2323 return ret; 2324 } 2325 2326 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 2327 { 2328 struct mv643xx_eth_private *mp = netdev_priv(dev); 2329 2330 if (new_mtu < 64 || new_mtu > 9500) 2331 return -EINVAL; 2332 2333 dev->mtu = new_mtu; 2334 mv643xx_eth_recalc_skb_size(mp); 2335 tx_set_rate(mp, 1000000000, 16777216); 2336 2337 if (!netif_running(dev)) 2338 return 0; 2339 2340 /* 2341 * Stop and then re-open the interface. This will allocate RX 2342 * skbs of the new MTU. 2343 * There is a possible danger that the open will not succeed, 2344 * due to memory being full. 2345 */ 2346 mv643xx_eth_stop(dev); 2347 if (mv643xx_eth_open(dev)) { 2348 netdev_err(dev, 2349 "fatal error on re-opening device after MTU change\n"); 2350 } 2351 2352 return 0; 2353 } 2354 2355 static void tx_timeout_task(struct work_struct *ugly) 2356 { 2357 struct mv643xx_eth_private *mp; 2358 2359 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task); 2360 if (netif_running(mp->dev)) { 2361 netif_tx_stop_all_queues(mp->dev); 2362 port_reset(mp); 2363 port_start(mp); 2364 netif_tx_wake_all_queues(mp->dev); 2365 } 2366 } 2367 2368 static void mv643xx_eth_tx_timeout(struct net_device *dev) 2369 { 2370 struct mv643xx_eth_private *mp = netdev_priv(dev); 2371 2372 netdev_info(dev, "tx timeout\n"); 2373 2374 schedule_work(&mp->tx_timeout_task); 2375 } 2376 2377 #ifdef CONFIG_NET_POLL_CONTROLLER 2378 static void mv643xx_eth_netpoll(struct net_device *dev) 2379 { 2380 struct mv643xx_eth_private *mp = netdev_priv(dev); 2381 2382 wrlp(mp, INT_MASK, 0x00000000); 2383 rdlp(mp, INT_MASK); 2384 2385 mv643xx_eth_irq(dev->irq, dev); 2386 2387 wrlp(mp, INT_MASK, mp->int_mask); 2388 } 2389 #endif 2390 2391 2392 /* platform glue ************************************************************/ 2393 static void 2394 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, 2395 const struct mbus_dram_target_info *dram) 2396 { 2397 void __iomem *base = msp->base; 2398 u32 win_enable; 2399 u32 win_protect; 2400 int i; 2401 2402 for (i = 0; i < 6; i++) { 2403 writel(0, base + WINDOW_BASE(i)); 2404 writel(0, base + WINDOW_SIZE(i)); 2405 if (i < 4) 2406 writel(0, base + WINDOW_REMAP_HIGH(i)); 2407 } 2408 2409 win_enable = 0x3f; 2410 win_protect = 0; 2411 2412 for (i = 0; i < dram->num_cs; i++) { 2413 const struct mbus_dram_window *cs = dram->cs + i; 2414 2415 writel((cs->base & 0xffff0000) | 2416 (cs->mbus_attr << 8) | 2417 dram->mbus_dram_target_id, base + WINDOW_BASE(i)); 2418 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); 2419 2420 win_enable &= ~(1 << i); 2421 win_protect |= 3 << (2 * i); 2422 } 2423 2424 writel(win_enable, base + WINDOW_BAR_ENABLE); 2425 msp->win_protect = win_protect; 2426 } 2427 2428 static void infer_hw_params(struct mv643xx_eth_shared_private *msp) 2429 { 2430 /* 2431 * Check whether we have a 14-bit coal limit field in bits 2432 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the 2433 * SDMA config register. 2434 */ 2435 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); 2436 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) 2437 msp->extended_rx_coal_limit = 1; 2438 else 2439 msp->extended_rx_coal_limit = 0; 2440 2441 /* 2442 * Check whether the MAC supports TX rate control, and if 2443 * yes, whether its associated registers are in the old or 2444 * the new place. 2445 */ 2446 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); 2447 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { 2448 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; 2449 } else { 2450 writel(7, msp->base + 0x0400 + TX_BW_RATE); 2451 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) 2452 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; 2453 else 2454 msp->tx_bw_control = TX_BW_CONTROL_ABSENT; 2455 } 2456 } 2457 2458 #if defined(CONFIG_OF) 2459 static const struct of_device_id mv643xx_eth_shared_ids[] = { 2460 { .compatible = "marvell,orion-eth", }, 2461 { .compatible = "marvell,kirkwood-eth", }, 2462 { } 2463 }; 2464 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); 2465 #endif 2466 2467 #if defined(CONFIG_OF) && !defined(CONFIG_MV64X60) 2468 #define mv643xx_eth_property(_np, _name, _v) \ 2469 do { \ 2470 u32 tmp; \ 2471 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ 2472 _v = tmp; \ 2473 } while (0) 2474 2475 static struct platform_device *port_platdev[3]; 2476 2477 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, 2478 struct device_node *pnp) 2479 { 2480 struct platform_device *ppdev; 2481 struct mv643xx_eth_platform_data ppd; 2482 struct resource res; 2483 const char *mac_addr; 2484 int ret; 2485 int dev_num = 0; 2486 2487 memset(&ppd, 0, sizeof(ppd)); 2488 ppd.shared = pdev; 2489 2490 memset(&res, 0, sizeof(res)); 2491 if (!of_irq_to_resource(pnp, 0, &res)) { 2492 dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name); 2493 return -EINVAL; 2494 } 2495 2496 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { 2497 dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name); 2498 return -EINVAL; 2499 } 2500 2501 if (ppd.port_number >= 3) { 2502 dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name); 2503 return -EINVAL; 2504 } 2505 2506 while (dev_num < 3 && port_platdev[dev_num]) 2507 dev_num++; 2508 2509 if (dev_num == 3) { 2510 dev_err(&pdev->dev, "too many ports registered\n"); 2511 return -EINVAL; 2512 } 2513 2514 mac_addr = of_get_mac_address(pnp); 2515 if (mac_addr) 2516 memcpy(ppd.mac_addr, mac_addr, 6); 2517 2518 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); 2519 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); 2520 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); 2521 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); 2522 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); 2523 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); 2524 2525 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); 2526 if (!ppd.phy_node) { 2527 ppd.phy_addr = MV643XX_ETH_PHY_NONE; 2528 of_property_read_u32(pnp, "speed", &ppd.speed); 2529 of_property_read_u32(pnp, "duplex", &ppd.duplex); 2530 } 2531 2532 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); 2533 if (!ppdev) 2534 return -ENOMEM; 2535 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 2536 ppdev->dev.of_node = pnp; 2537 2538 ret = platform_device_add_resources(ppdev, &res, 1); 2539 if (ret) 2540 goto port_err; 2541 2542 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); 2543 if (ret) 2544 goto port_err; 2545 2546 ret = platform_device_add(ppdev); 2547 if (ret) 2548 goto port_err; 2549 2550 port_platdev[dev_num] = ppdev; 2551 2552 return 0; 2553 2554 port_err: 2555 platform_device_put(ppdev); 2556 return ret; 2557 } 2558 2559 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2560 { 2561 struct mv643xx_eth_shared_platform_data *pd; 2562 struct device_node *pnp, *np = pdev->dev.of_node; 2563 int ret; 2564 2565 /* bail out if not registered from DT */ 2566 if (!np) 2567 return 0; 2568 2569 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); 2570 if (!pd) 2571 return -ENOMEM; 2572 pdev->dev.platform_data = pd; 2573 2574 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); 2575 2576 for_each_available_child_of_node(np, pnp) { 2577 ret = mv643xx_eth_shared_of_add_port(pdev, pnp); 2578 if (ret) 2579 return ret; 2580 } 2581 return 0; 2582 } 2583 2584 static void mv643xx_eth_shared_of_remove(void) 2585 { 2586 int n; 2587 2588 for (n = 0; n < 3; n++) { 2589 platform_device_del(port_platdev[n]); 2590 port_platdev[n] = NULL; 2591 } 2592 } 2593 #else 2594 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2595 { 2596 return 0; 2597 } 2598 2599 static inline void mv643xx_eth_shared_of_remove(void) 2600 { 2601 } 2602 #endif 2603 2604 static int mv643xx_eth_shared_probe(struct platform_device *pdev) 2605 { 2606 static int mv643xx_eth_version_printed; 2607 struct mv643xx_eth_shared_platform_data *pd; 2608 struct mv643xx_eth_shared_private *msp; 2609 const struct mbus_dram_target_info *dram; 2610 struct resource *res; 2611 int ret; 2612 2613 if (!mv643xx_eth_version_printed++) 2614 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", 2615 mv643xx_eth_driver_version); 2616 2617 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2618 if (res == NULL) 2619 return -EINVAL; 2620 2621 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); 2622 if (msp == NULL) 2623 return -ENOMEM; 2624 platform_set_drvdata(pdev, msp); 2625 2626 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 2627 if (msp->base == NULL) 2628 return -ENOMEM; 2629 2630 msp->clk = devm_clk_get(&pdev->dev, NULL); 2631 if (!IS_ERR(msp->clk)) 2632 clk_prepare_enable(msp->clk); 2633 2634 /* 2635 * (Re-)program MBUS remapping windows if we are asked to. 2636 */ 2637 dram = mv_mbus_dram_info(); 2638 if (dram) 2639 mv643xx_eth_conf_mbus_windows(msp, dram); 2640 2641 ret = mv643xx_eth_shared_of_probe(pdev); 2642 if (ret) 2643 return ret; 2644 pd = dev_get_platdata(&pdev->dev); 2645 2646 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? 2647 pd->tx_csum_limit : 9 * 1024; 2648 infer_hw_params(msp); 2649 2650 return 0; 2651 } 2652 2653 static int mv643xx_eth_shared_remove(struct platform_device *pdev) 2654 { 2655 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); 2656 2657 mv643xx_eth_shared_of_remove(); 2658 if (!IS_ERR(msp->clk)) 2659 clk_disable_unprepare(msp->clk); 2660 return 0; 2661 } 2662 2663 static struct platform_driver mv643xx_eth_shared_driver = { 2664 .probe = mv643xx_eth_shared_probe, 2665 .remove = mv643xx_eth_shared_remove, 2666 .driver = { 2667 .name = MV643XX_ETH_SHARED_NAME, 2668 .owner = THIS_MODULE, 2669 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), 2670 }, 2671 }; 2672 2673 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) 2674 { 2675 int addr_shift = 5 * mp->port_num; 2676 u32 data; 2677 2678 data = rdl(mp, PHY_ADDR); 2679 data &= ~(0x1f << addr_shift); 2680 data |= (phy_addr & 0x1f) << addr_shift; 2681 wrl(mp, PHY_ADDR, data); 2682 } 2683 2684 static int phy_addr_get(struct mv643xx_eth_private *mp) 2685 { 2686 unsigned int data; 2687 2688 data = rdl(mp, PHY_ADDR); 2689 2690 return (data >> (5 * mp->port_num)) & 0x1f; 2691 } 2692 2693 static void set_params(struct mv643xx_eth_private *mp, 2694 struct mv643xx_eth_platform_data *pd) 2695 { 2696 struct net_device *dev = mp->dev; 2697 2698 if (is_valid_ether_addr(pd->mac_addr)) 2699 memcpy(dev->dev_addr, pd->mac_addr, 6); 2700 else 2701 uc_addr_get(mp, dev->dev_addr); 2702 2703 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE; 2704 if (pd->rx_queue_size) 2705 mp->rx_ring_size = pd->rx_queue_size; 2706 mp->rx_desc_sram_addr = pd->rx_sram_addr; 2707 mp->rx_desc_sram_size = pd->rx_sram_size; 2708 2709 mp->rxq_count = pd->rx_queue_count ? : 1; 2710 2711 mp->tx_ring_size = DEFAULT_TX_QUEUE_SIZE; 2712 if (pd->tx_queue_size) 2713 mp->tx_ring_size = pd->tx_queue_size; 2714 mp->tx_desc_sram_addr = pd->tx_sram_addr; 2715 mp->tx_desc_sram_size = pd->tx_sram_size; 2716 2717 mp->txq_count = pd->tx_queue_count ? : 1; 2718 } 2719 2720 static void mv643xx_eth_adjust_link(struct net_device *dev) 2721 { 2722 struct mv643xx_eth_private *mp = netdev_priv(dev); 2723 2724 mv643xx_adjust_pscr(mp); 2725 } 2726 2727 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp, 2728 int phy_addr) 2729 { 2730 struct phy_device *phydev; 2731 int start; 2732 int num; 2733 int i; 2734 char phy_id[MII_BUS_ID_SIZE + 3]; 2735 2736 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { 2737 start = phy_addr_get(mp) & 0x1f; 2738 num = 32; 2739 } else { 2740 start = phy_addr & 0x1f; 2741 num = 1; 2742 } 2743 2744 /* Attempt to connect to the PHY using orion-mdio */ 2745 phydev = ERR_PTR(-ENODEV); 2746 for (i = 0; i < num; i++) { 2747 int addr = (start + i) & 0x1f; 2748 2749 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, 2750 "orion-mdio-mii", addr); 2751 2752 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, 2753 PHY_INTERFACE_MODE_GMII); 2754 if (!IS_ERR(phydev)) { 2755 phy_addr_set(mp, addr); 2756 break; 2757 } 2758 } 2759 2760 return phydev; 2761 } 2762 2763 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) 2764 { 2765 struct phy_device *phy = mp->phy; 2766 2767 phy_reset(mp); 2768 2769 if (speed == 0) { 2770 phy->autoneg = AUTONEG_ENABLE; 2771 phy->speed = 0; 2772 phy->duplex = 0; 2773 phy->advertising = phy->supported | ADVERTISED_Autoneg; 2774 } else { 2775 phy->autoneg = AUTONEG_DISABLE; 2776 phy->advertising = 0; 2777 phy->speed = speed; 2778 phy->duplex = duplex; 2779 } 2780 phy_start_aneg(phy); 2781 } 2782 2783 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) 2784 { 2785 u32 pscr; 2786 2787 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2788 if (pscr & SERIAL_PORT_ENABLE) { 2789 pscr &= ~SERIAL_PORT_ENABLE; 2790 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2791 } 2792 2793 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; 2794 if (mp->phy == NULL) { 2795 pscr |= DISABLE_AUTO_NEG_SPEED_GMII; 2796 if (speed == SPEED_1000) 2797 pscr |= SET_GMII_SPEED_TO_1000; 2798 else if (speed == SPEED_100) 2799 pscr |= SET_MII_SPEED_TO_100; 2800 2801 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; 2802 2803 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; 2804 if (duplex == DUPLEX_FULL) 2805 pscr |= SET_FULL_DUPLEX_MODE; 2806 } 2807 2808 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2809 } 2810 2811 static const struct net_device_ops mv643xx_eth_netdev_ops = { 2812 .ndo_open = mv643xx_eth_open, 2813 .ndo_stop = mv643xx_eth_stop, 2814 .ndo_start_xmit = mv643xx_eth_xmit, 2815 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, 2816 .ndo_set_mac_address = mv643xx_eth_set_mac_address, 2817 .ndo_validate_addr = eth_validate_addr, 2818 .ndo_do_ioctl = mv643xx_eth_ioctl, 2819 .ndo_change_mtu = mv643xx_eth_change_mtu, 2820 .ndo_set_features = mv643xx_eth_set_features, 2821 .ndo_tx_timeout = mv643xx_eth_tx_timeout, 2822 .ndo_get_stats = mv643xx_eth_get_stats, 2823 #ifdef CONFIG_NET_POLL_CONTROLLER 2824 .ndo_poll_controller = mv643xx_eth_netpoll, 2825 #endif 2826 }; 2827 2828 static int mv643xx_eth_probe(struct platform_device *pdev) 2829 { 2830 struct mv643xx_eth_platform_data *pd; 2831 struct mv643xx_eth_private *mp; 2832 struct net_device *dev; 2833 struct resource *res; 2834 int err; 2835 2836 pd = dev_get_platdata(&pdev->dev); 2837 if (pd == NULL) { 2838 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); 2839 return -ENODEV; 2840 } 2841 2842 if (pd->shared == NULL) { 2843 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); 2844 return -ENODEV; 2845 } 2846 2847 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); 2848 if (!dev) 2849 return -ENOMEM; 2850 2851 mp = netdev_priv(dev); 2852 platform_set_drvdata(pdev, mp); 2853 2854 mp->shared = platform_get_drvdata(pd->shared); 2855 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); 2856 mp->port_num = pd->port_number; 2857 2858 mp->dev = dev; 2859 2860 /* Kirkwood resets some registers on gated clocks. Especially 2861 * CLK125_BYPASS_EN must be cleared but is not available on 2862 * all other SoCs/System Controllers using this driver. 2863 */ 2864 if (of_device_is_compatible(pdev->dev.of_node, 2865 "marvell,kirkwood-eth-port")) 2866 wrlp(mp, PORT_SERIAL_CONTROL1, 2867 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); 2868 2869 /* 2870 * Start with a default rate, and if there is a clock, allow 2871 * it to override the default. 2872 */ 2873 mp->t_clk = 133000000; 2874 mp->clk = devm_clk_get(&pdev->dev, NULL); 2875 if (!IS_ERR(mp->clk)) { 2876 clk_prepare_enable(mp->clk); 2877 mp->t_clk = clk_get_rate(mp->clk); 2878 } else if (!IS_ERR(mp->shared->clk)) { 2879 mp->t_clk = clk_get_rate(mp->shared->clk); 2880 } 2881 2882 set_params(mp, pd); 2883 netif_set_real_num_tx_queues(dev, mp->txq_count); 2884 netif_set_real_num_rx_queues(dev, mp->rxq_count); 2885 2886 err = 0; 2887 if (pd->phy_node) { 2888 mp->phy = of_phy_connect(mp->dev, pd->phy_node, 2889 mv643xx_eth_adjust_link, 0, 2890 PHY_INTERFACE_MODE_GMII); 2891 if (!mp->phy) 2892 err = -ENODEV; 2893 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { 2894 mp->phy = phy_scan(mp, pd->phy_addr); 2895 2896 if (IS_ERR(mp->phy)) 2897 err = PTR_ERR(mp->phy); 2898 else 2899 phy_init(mp, pd->speed, pd->duplex); 2900 } 2901 if (err == -ENODEV) { 2902 err = -EPROBE_DEFER; 2903 goto out; 2904 } 2905 if (err) 2906 goto out; 2907 2908 SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops); 2909 2910 init_pscr(mp, pd->speed, pd->duplex); 2911 2912 2913 mib_counters_clear(mp); 2914 2915 init_timer(&mp->mib_counters_timer); 2916 mp->mib_counters_timer.data = (unsigned long)mp; 2917 mp->mib_counters_timer.function = mib_counters_timer_wrapper; 2918 mp->mib_counters_timer.expires = jiffies + 30 * HZ; 2919 2920 spin_lock_init(&mp->mib_counters_lock); 2921 2922 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); 2923 2924 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT); 2925 2926 init_timer(&mp->rx_oom); 2927 mp->rx_oom.data = (unsigned long)mp; 2928 mp->rx_oom.function = oom_timer_wrapper; 2929 2930 2931 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 2932 BUG_ON(!res); 2933 dev->irq = res->start; 2934 2935 dev->netdev_ops = &mv643xx_eth_netdev_ops; 2936 2937 dev->watchdog_timeo = 2 * HZ; 2938 dev->base_addr = 0; 2939 2940 dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 2941 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 2942 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM; 2943 2944 dev->priv_flags |= IFF_UNICAST_FLT; 2945 2946 SET_NETDEV_DEV(dev, &pdev->dev); 2947 2948 if (mp->shared->win_protect) 2949 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); 2950 2951 netif_carrier_off(dev); 2952 2953 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); 2954 2955 set_rx_coal(mp, 250); 2956 set_tx_coal(mp, 0); 2957 2958 err = register_netdev(dev); 2959 if (err) 2960 goto out; 2961 2962 netdev_notice(dev, "port %d with MAC address %pM\n", 2963 mp->port_num, dev->dev_addr); 2964 2965 if (mp->tx_desc_sram_size > 0) 2966 netdev_notice(dev, "configured with sram\n"); 2967 2968 return 0; 2969 2970 out: 2971 if (!IS_ERR(mp->clk)) 2972 clk_disable_unprepare(mp->clk); 2973 free_netdev(dev); 2974 2975 return err; 2976 } 2977 2978 static int mv643xx_eth_remove(struct platform_device *pdev) 2979 { 2980 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 2981 2982 unregister_netdev(mp->dev); 2983 if (mp->phy != NULL) 2984 phy_disconnect(mp->phy); 2985 cancel_work_sync(&mp->tx_timeout_task); 2986 2987 if (!IS_ERR(mp->clk)) 2988 clk_disable_unprepare(mp->clk); 2989 2990 free_netdev(mp->dev); 2991 2992 return 0; 2993 } 2994 2995 static void mv643xx_eth_shutdown(struct platform_device *pdev) 2996 { 2997 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 2998 2999 /* Mask all interrupts on ethernet port */ 3000 wrlp(mp, INT_MASK, 0); 3001 rdlp(mp, INT_MASK); 3002 3003 if (netif_running(mp->dev)) 3004 port_reset(mp); 3005 } 3006 3007 static struct platform_driver mv643xx_eth_driver = { 3008 .probe = mv643xx_eth_probe, 3009 .remove = mv643xx_eth_remove, 3010 .shutdown = mv643xx_eth_shutdown, 3011 .driver = { 3012 .name = MV643XX_ETH_NAME, 3013 .owner = THIS_MODULE, 3014 }, 3015 }; 3016 3017 static int __init mv643xx_eth_init_module(void) 3018 { 3019 int rc; 3020 3021 rc = platform_driver_register(&mv643xx_eth_shared_driver); 3022 if (!rc) { 3023 rc = platform_driver_register(&mv643xx_eth_driver); 3024 if (rc) 3025 platform_driver_unregister(&mv643xx_eth_shared_driver); 3026 } 3027 3028 return rc; 3029 } 3030 module_init(mv643xx_eth_init_module); 3031 3032 static void __exit mv643xx_eth_cleanup_module(void) 3033 { 3034 platform_driver_unregister(&mv643xx_eth_driver); 3035 platform_driver_unregister(&mv643xx_eth_shared_driver); 3036 } 3037 module_exit(mv643xx_eth_cleanup_module); 3038 3039 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " 3040 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); 3041 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); 3042 MODULE_LICENSE("GPL"); 3043 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); 3044 MODULE_ALIAS("platform:" MV643XX_ETH_NAME); 3045