1 /* 2 * Driver for Marvell Discovery (MV643XX) and Marvell Orion ethernet ports 3 * Copyright (C) 2002 Matthew Dharm <mdharm@momenco.com> 4 * 5 * Based on the 64360 driver from: 6 * Copyright (C) 2002 Rabeeh Khoury <rabeeh@galileo.co.il> 7 * Rabeeh Khoury <rabeeh@marvell.com> 8 * 9 * Copyright (C) 2003 PMC-Sierra, Inc., 10 * written by Manish Lachwani 11 * 12 * Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org> 13 * 14 * Copyright (C) 2004-2006 MontaVista Software, Inc. 15 * Dale Farnsworth <dale@farnsworth.org> 16 * 17 * Copyright (C) 2004 Steven J. Hill <sjhill1@rockwellcollins.com> 18 * <sjhill@realitydiluted.com> 19 * 20 * Copyright (C) 2007-2008 Marvell Semiconductor 21 * Lennert Buytenhek <buytenh@marvell.com> 22 * 23 * Copyright (C) 2013 Michael Stapelberg <michael@stapelberg.de> 24 * 25 * This program is free software; you can redistribute it and/or 26 * modify it under the terms of the GNU General Public License 27 * as published by the Free Software Foundation; either version 2 28 * of the License, or (at your option) any later version. 29 * 30 * This program is distributed in the hope that it will be useful, 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 33 * GNU General Public License for more details. 34 * 35 * You should have received a copy of the GNU General Public License 36 * along with this program; if not, see <http://www.gnu.org/licenses/>. 37 */ 38 39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 40 41 #include <linux/init.h> 42 #include <linux/dma-mapping.h> 43 #include <linux/in.h> 44 #include <linux/ip.h> 45 #include <net/tso.h> 46 #include <linux/tcp.h> 47 #include <linux/udp.h> 48 #include <linux/etherdevice.h> 49 #include <linux/delay.h> 50 #include <linux/ethtool.h> 51 #include <linux/platform_device.h> 52 #include <linux/module.h> 53 #include <linux/kernel.h> 54 #include <linux/spinlock.h> 55 #include <linux/workqueue.h> 56 #include <linux/phy.h> 57 #include <linux/mv643xx_eth.h> 58 #include <linux/io.h> 59 #include <linux/interrupt.h> 60 #include <linux/types.h> 61 #include <linux/slab.h> 62 #include <linux/clk.h> 63 #include <linux/of.h> 64 #include <linux/of_irq.h> 65 #include <linux/of_net.h> 66 #include <linux/of_mdio.h> 67 68 static char mv643xx_eth_driver_name[] = "mv643xx_eth"; 69 static char mv643xx_eth_driver_version[] = "1.4"; 70 71 72 /* 73 * Registers shared between all ports. 74 */ 75 #define PHY_ADDR 0x0000 76 #define WINDOW_BASE(w) (0x0200 + ((w) << 3)) 77 #define WINDOW_SIZE(w) (0x0204 + ((w) << 3)) 78 #define WINDOW_REMAP_HIGH(w) (0x0280 + ((w) << 2)) 79 #define WINDOW_BAR_ENABLE 0x0290 80 #define WINDOW_PROTECT(w) (0x0294 + ((w) << 4)) 81 82 /* 83 * Main per-port registers. These live at offset 0x0400 for 84 * port #0, 0x0800 for port #1, and 0x0c00 for port #2. 85 */ 86 #define PORT_CONFIG 0x0000 87 #define UNICAST_PROMISCUOUS_MODE 0x00000001 88 #define PORT_CONFIG_EXT 0x0004 89 #define MAC_ADDR_LOW 0x0014 90 #define MAC_ADDR_HIGH 0x0018 91 #define SDMA_CONFIG 0x001c 92 #define TX_BURST_SIZE_16_64BIT 0x01000000 93 #define TX_BURST_SIZE_4_64BIT 0x00800000 94 #define BLM_TX_NO_SWAP 0x00000020 95 #define BLM_RX_NO_SWAP 0x00000010 96 #define RX_BURST_SIZE_16_64BIT 0x00000008 97 #define RX_BURST_SIZE_4_64BIT 0x00000004 98 #define PORT_SERIAL_CONTROL 0x003c 99 #define SET_MII_SPEED_TO_100 0x01000000 100 #define SET_GMII_SPEED_TO_1000 0x00800000 101 #define SET_FULL_DUPLEX_MODE 0x00200000 102 #define MAX_RX_PACKET_9700BYTE 0x000a0000 103 #define DISABLE_AUTO_NEG_SPEED_GMII 0x00002000 104 #define DO_NOT_FORCE_LINK_FAIL 0x00000400 105 #define SERIAL_PORT_CONTROL_RESERVED 0x00000200 106 #define DISABLE_AUTO_NEG_FOR_FLOW_CTRL 0x00000008 107 #define DISABLE_AUTO_NEG_FOR_DUPLEX 0x00000004 108 #define FORCE_LINK_PASS 0x00000002 109 #define SERIAL_PORT_ENABLE 0x00000001 110 #define PORT_STATUS 0x0044 111 #define TX_FIFO_EMPTY 0x00000400 112 #define TX_IN_PROGRESS 0x00000080 113 #define PORT_SPEED_MASK 0x00000030 114 #define PORT_SPEED_1000 0x00000010 115 #define PORT_SPEED_100 0x00000020 116 #define PORT_SPEED_10 0x00000000 117 #define FLOW_CONTROL_ENABLED 0x00000008 118 #define FULL_DUPLEX 0x00000004 119 #define LINK_UP 0x00000002 120 #define TXQ_COMMAND 0x0048 121 #define TXQ_FIX_PRIO_CONF 0x004c 122 #define PORT_SERIAL_CONTROL1 0x004c 123 #define CLK125_BYPASS_EN 0x00000010 124 #define TX_BW_RATE 0x0050 125 #define TX_BW_MTU 0x0058 126 #define TX_BW_BURST 0x005c 127 #define INT_CAUSE 0x0060 128 #define INT_TX_END 0x07f80000 129 #define INT_TX_END_0 0x00080000 130 #define INT_RX 0x000003fc 131 #define INT_RX_0 0x00000004 132 #define INT_EXT 0x00000002 133 #define INT_CAUSE_EXT 0x0064 134 #define INT_EXT_LINK_PHY 0x00110000 135 #define INT_EXT_TX 0x000000ff 136 #define INT_MASK 0x0068 137 #define INT_MASK_EXT 0x006c 138 #define TX_FIFO_URGENT_THRESHOLD 0x0074 139 #define RX_DISCARD_FRAME_CNT 0x0084 140 #define RX_OVERRUN_FRAME_CNT 0x0088 141 #define TXQ_FIX_PRIO_CONF_MOVED 0x00dc 142 #define TX_BW_RATE_MOVED 0x00e0 143 #define TX_BW_MTU_MOVED 0x00e8 144 #define TX_BW_BURST_MOVED 0x00ec 145 #define RXQ_CURRENT_DESC_PTR(q) (0x020c + ((q) << 4)) 146 #define RXQ_COMMAND 0x0280 147 #define TXQ_CURRENT_DESC_PTR(q) (0x02c0 + ((q) << 2)) 148 #define TXQ_BW_TOKENS(q) (0x0300 + ((q) << 4)) 149 #define TXQ_BW_CONF(q) (0x0304 + ((q) << 4)) 150 #define TXQ_BW_WRR_CONF(q) (0x0308 + ((q) << 4)) 151 152 /* 153 * Misc per-port registers. 154 */ 155 #define MIB_COUNTERS(p) (0x1000 + ((p) << 7)) 156 #define SPECIAL_MCAST_TABLE(p) (0x1400 + ((p) << 10)) 157 #define OTHER_MCAST_TABLE(p) (0x1500 + ((p) << 10)) 158 #define UNICAST_TABLE(p) (0x1600 + ((p) << 10)) 159 160 161 /* 162 * SDMA configuration register default value. 163 */ 164 #if defined(__BIG_ENDIAN) 165 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 166 (RX_BURST_SIZE_4_64BIT | \ 167 TX_BURST_SIZE_4_64BIT) 168 #elif defined(__LITTLE_ENDIAN) 169 #define PORT_SDMA_CONFIG_DEFAULT_VALUE \ 170 (RX_BURST_SIZE_4_64BIT | \ 171 BLM_RX_NO_SWAP | \ 172 BLM_TX_NO_SWAP | \ 173 TX_BURST_SIZE_4_64BIT) 174 #else 175 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 176 #endif 177 178 179 /* 180 * Misc definitions. 181 */ 182 #define DEFAULT_RX_QUEUE_SIZE 128 183 #define DEFAULT_TX_QUEUE_SIZE 512 184 #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) 185 186 #define TSO_HEADER_SIZE 128 187 188 /* Max number of allowed TCP segments for software TSO */ 189 #define MV643XX_MAX_TSO_SEGS 100 190 #define MV643XX_MAX_SKB_DESCS (MV643XX_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 191 192 #define IS_TSO_HEADER(txq, addr) \ 193 ((addr >= txq->tso_hdrs_dma) && \ 194 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE)) 195 /* 196 * RX/TX descriptors. 197 */ 198 #if defined(__BIG_ENDIAN) 199 struct rx_desc { 200 u16 byte_cnt; /* Descriptor buffer byte count */ 201 u16 buf_size; /* Buffer size */ 202 u32 cmd_sts; /* Descriptor command status */ 203 u32 next_desc_ptr; /* Next descriptor pointer */ 204 u32 buf_ptr; /* Descriptor buffer pointer */ 205 }; 206 207 struct tx_desc { 208 u16 byte_cnt; /* buffer byte count */ 209 u16 l4i_chk; /* CPU provided TCP checksum */ 210 u32 cmd_sts; /* Command/status field */ 211 u32 next_desc_ptr; /* Pointer to next descriptor */ 212 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 213 }; 214 #elif defined(__LITTLE_ENDIAN) 215 struct rx_desc { 216 u32 cmd_sts; /* Descriptor command status */ 217 u16 buf_size; /* Buffer size */ 218 u16 byte_cnt; /* Descriptor buffer byte count */ 219 u32 buf_ptr; /* Descriptor buffer pointer */ 220 u32 next_desc_ptr; /* Next descriptor pointer */ 221 }; 222 223 struct tx_desc { 224 u32 cmd_sts; /* Command/status field */ 225 u16 l4i_chk; /* CPU provided TCP checksum */ 226 u16 byte_cnt; /* buffer byte count */ 227 u32 buf_ptr; /* pointer to buffer for this descriptor*/ 228 u32 next_desc_ptr; /* Pointer to next descriptor */ 229 }; 230 #else 231 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined 232 #endif 233 234 /* RX & TX descriptor command */ 235 #define BUFFER_OWNED_BY_DMA 0x80000000 236 237 /* RX & TX descriptor status */ 238 #define ERROR_SUMMARY 0x00000001 239 240 /* RX descriptor status */ 241 #define LAYER_4_CHECKSUM_OK 0x40000000 242 #define RX_ENABLE_INTERRUPT 0x20000000 243 #define RX_FIRST_DESC 0x08000000 244 #define RX_LAST_DESC 0x04000000 245 #define RX_IP_HDR_OK 0x02000000 246 #define RX_PKT_IS_IPV4 0x01000000 247 #define RX_PKT_IS_ETHERNETV2 0x00800000 248 #define RX_PKT_LAYER4_TYPE_MASK 0x00600000 249 #define RX_PKT_LAYER4_TYPE_TCP_IPV4 0x00000000 250 #define RX_PKT_IS_VLAN_TAGGED 0x00080000 251 252 /* TX descriptor command */ 253 #define TX_ENABLE_INTERRUPT 0x00800000 254 #define GEN_CRC 0x00400000 255 #define TX_FIRST_DESC 0x00200000 256 #define TX_LAST_DESC 0x00100000 257 #define ZERO_PADDING 0x00080000 258 #define GEN_IP_V4_CHECKSUM 0x00040000 259 #define GEN_TCP_UDP_CHECKSUM 0x00020000 260 #define UDP_FRAME 0x00010000 261 #define MAC_HDR_EXTRA_4_BYTES 0x00008000 262 #define GEN_TCP_UDP_CHK_FULL 0x00000400 263 #define MAC_HDR_EXTRA_8_BYTES 0x00000200 264 265 #define TX_IHL_SHIFT 11 266 267 268 /* global *******************************************************************/ 269 struct mv643xx_eth_shared_private { 270 /* 271 * Ethernet controller base address. 272 */ 273 void __iomem *base; 274 275 /* 276 * Per-port MBUS window access register value. 277 */ 278 u32 win_protect; 279 280 /* 281 * Hardware-specific parameters. 282 */ 283 int extended_rx_coal_limit; 284 int tx_bw_control; 285 int tx_csum_limit; 286 struct clk *clk; 287 }; 288 289 #define TX_BW_CONTROL_ABSENT 0 290 #define TX_BW_CONTROL_OLD_LAYOUT 1 291 #define TX_BW_CONTROL_NEW_LAYOUT 2 292 293 static int mv643xx_eth_open(struct net_device *dev); 294 static int mv643xx_eth_stop(struct net_device *dev); 295 296 297 /* per-port *****************************************************************/ 298 struct mib_counters { 299 u64 good_octets_received; 300 u32 bad_octets_received; 301 u32 internal_mac_transmit_err; 302 u32 good_frames_received; 303 u32 bad_frames_received; 304 u32 broadcast_frames_received; 305 u32 multicast_frames_received; 306 u32 frames_64_octets; 307 u32 frames_65_to_127_octets; 308 u32 frames_128_to_255_octets; 309 u32 frames_256_to_511_octets; 310 u32 frames_512_to_1023_octets; 311 u32 frames_1024_to_max_octets; 312 u64 good_octets_sent; 313 u32 good_frames_sent; 314 u32 excessive_collision; 315 u32 multicast_frames_sent; 316 u32 broadcast_frames_sent; 317 u32 unrec_mac_control_received; 318 u32 fc_sent; 319 u32 good_fc_received; 320 u32 bad_fc_received; 321 u32 undersize_received; 322 u32 fragments_received; 323 u32 oversize_received; 324 u32 jabber_received; 325 u32 mac_receive_error; 326 u32 bad_crc_event; 327 u32 collision; 328 u32 late_collision; 329 /* Non MIB hardware counters */ 330 u32 rx_discard; 331 u32 rx_overrun; 332 }; 333 334 struct rx_queue { 335 int index; 336 337 int rx_ring_size; 338 339 int rx_desc_count; 340 int rx_curr_desc; 341 int rx_used_desc; 342 343 struct rx_desc *rx_desc_area; 344 dma_addr_t rx_desc_dma; 345 int rx_desc_area_size; 346 struct sk_buff **rx_skb; 347 }; 348 349 struct tx_queue { 350 int index; 351 352 int tx_ring_size; 353 354 int tx_desc_count; 355 int tx_curr_desc; 356 int tx_used_desc; 357 358 int tx_stop_threshold; 359 int tx_wake_threshold; 360 361 char *tso_hdrs; 362 dma_addr_t tso_hdrs_dma; 363 364 struct tx_desc *tx_desc_area; 365 dma_addr_t tx_desc_dma; 366 int tx_desc_area_size; 367 368 struct sk_buff_head tx_skb; 369 370 unsigned long tx_packets; 371 unsigned long tx_bytes; 372 unsigned long tx_dropped; 373 }; 374 375 struct mv643xx_eth_private { 376 struct mv643xx_eth_shared_private *shared; 377 void __iomem *base; 378 int port_num; 379 380 struct net_device *dev; 381 382 struct phy_device *phy; 383 384 struct timer_list mib_counters_timer; 385 spinlock_t mib_counters_lock; 386 struct mib_counters mib_counters; 387 388 struct work_struct tx_timeout_task; 389 390 struct napi_struct napi; 391 u32 int_mask; 392 u8 oom; 393 u8 work_link; 394 u8 work_tx; 395 u8 work_tx_end; 396 u8 work_rx; 397 u8 work_rx_refill; 398 399 int skb_size; 400 401 /* 402 * RX state. 403 */ 404 int rx_ring_size; 405 unsigned long rx_desc_sram_addr; 406 int rx_desc_sram_size; 407 int rxq_count; 408 struct timer_list rx_oom; 409 struct rx_queue rxq[8]; 410 411 /* 412 * TX state. 413 */ 414 int tx_ring_size; 415 unsigned long tx_desc_sram_addr; 416 int tx_desc_sram_size; 417 int txq_count; 418 struct tx_queue txq[8]; 419 420 /* 421 * Hardware-specific parameters. 422 */ 423 struct clk *clk; 424 unsigned int t_clk; 425 }; 426 427 428 /* port register accessors **************************************************/ 429 static inline u32 rdl(struct mv643xx_eth_private *mp, int offset) 430 { 431 return readl(mp->shared->base + offset); 432 } 433 434 static inline u32 rdlp(struct mv643xx_eth_private *mp, int offset) 435 { 436 return readl(mp->base + offset); 437 } 438 439 static inline void wrl(struct mv643xx_eth_private *mp, int offset, u32 data) 440 { 441 writel(data, mp->shared->base + offset); 442 } 443 444 static inline void wrlp(struct mv643xx_eth_private *mp, int offset, u32 data) 445 { 446 writel(data, mp->base + offset); 447 } 448 449 450 /* rxq/txq helper functions *************************************************/ 451 static struct mv643xx_eth_private *rxq_to_mp(struct rx_queue *rxq) 452 { 453 return container_of(rxq, struct mv643xx_eth_private, rxq[rxq->index]); 454 } 455 456 static struct mv643xx_eth_private *txq_to_mp(struct tx_queue *txq) 457 { 458 return container_of(txq, struct mv643xx_eth_private, txq[txq->index]); 459 } 460 461 static void rxq_enable(struct rx_queue *rxq) 462 { 463 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 464 wrlp(mp, RXQ_COMMAND, 1 << rxq->index); 465 } 466 467 static void rxq_disable(struct rx_queue *rxq) 468 { 469 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 470 u8 mask = 1 << rxq->index; 471 472 wrlp(mp, RXQ_COMMAND, mask << 8); 473 while (rdlp(mp, RXQ_COMMAND) & mask) 474 udelay(10); 475 } 476 477 static void txq_reset_hw_ptr(struct tx_queue *txq) 478 { 479 struct mv643xx_eth_private *mp = txq_to_mp(txq); 480 u32 addr; 481 482 addr = (u32)txq->tx_desc_dma; 483 addr += txq->tx_curr_desc * sizeof(struct tx_desc); 484 wrlp(mp, TXQ_CURRENT_DESC_PTR(txq->index), addr); 485 } 486 487 static void txq_enable(struct tx_queue *txq) 488 { 489 struct mv643xx_eth_private *mp = txq_to_mp(txq); 490 wrlp(mp, TXQ_COMMAND, 1 << txq->index); 491 } 492 493 static void txq_disable(struct tx_queue *txq) 494 { 495 struct mv643xx_eth_private *mp = txq_to_mp(txq); 496 u8 mask = 1 << txq->index; 497 498 wrlp(mp, TXQ_COMMAND, mask << 8); 499 while (rdlp(mp, TXQ_COMMAND) & mask) 500 udelay(10); 501 } 502 503 static void txq_maybe_wake(struct tx_queue *txq) 504 { 505 struct mv643xx_eth_private *mp = txq_to_mp(txq); 506 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 507 508 if (netif_tx_queue_stopped(nq)) { 509 __netif_tx_lock(nq, smp_processor_id()); 510 if (txq->tx_desc_count <= txq->tx_wake_threshold) 511 netif_tx_wake_queue(nq); 512 __netif_tx_unlock(nq); 513 } 514 } 515 516 static int rxq_process(struct rx_queue *rxq, int budget) 517 { 518 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 519 struct net_device_stats *stats = &mp->dev->stats; 520 int rx; 521 522 rx = 0; 523 while (rx < budget && rxq->rx_desc_count) { 524 struct rx_desc *rx_desc; 525 unsigned int cmd_sts; 526 struct sk_buff *skb; 527 u16 byte_cnt; 528 529 rx_desc = &rxq->rx_desc_area[rxq->rx_curr_desc]; 530 531 cmd_sts = rx_desc->cmd_sts; 532 if (cmd_sts & BUFFER_OWNED_BY_DMA) 533 break; 534 rmb(); 535 536 skb = rxq->rx_skb[rxq->rx_curr_desc]; 537 rxq->rx_skb[rxq->rx_curr_desc] = NULL; 538 539 rxq->rx_curr_desc++; 540 if (rxq->rx_curr_desc == rxq->rx_ring_size) 541 rxq->rx_curr_desc = 0; 542 543 dma_unmap_single(mp->dev->dev.parent, rx_desc->buf_ptr, 544 rx_desc->buf_size, DMA_FROM_DEVICE); 545 rxq->rx_desc_count--; 546 rx++; 547 548 mp->work_rx_refill |= 1 << rxq->index; 549 550 byte_cnt = rx_desc->byte_cnt; 551 552 /* 553 * Update statistics. 554 * 555 * Note that the descriptor byte count includes 2 dummy 556 * bytes automatically inserted by the hardware at the 557 * start of the packet (which we don't count), and a 4 558 * byte CRC at the end of the packet (which we do count). 559 */ 560 stats->rx_packets++; 561 stats->rx_bytes += byte_cnt - 2; 562 563 /* 564 * In case we received a packet without first / last bits 565 * on, or the error summary bit is set, the packet needs 566 * to be dropped. 567 */ 568 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC | ERROR_SUMMARY)) 569 != (RX_FIRST_DESC | RX_LAST_DESC)) 570 goto err; 571 572 /* 573 * The -4 is for the CRC in the trailer of the 574 * received packet 575 */ 576 skb_put(skb, byte_cnt - 2 - 4); 577 578 if (cmd_sts & LAYER_4_CHECKSUM_OK) 579 skb->ip_summed = CHECKSUM_UNNECESSARY; 580 skb->protocol = eth_type_trans(skb, mp->dev); 581 582 napi_gro_receive(&mp->napi, skb); 583 584 continue; 585 586 err: 587 stats->rx_dropped++; 588 589 if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != 590 (RX_FIRST_DESC | RX_LAST_DESC)) { 591 if (net_ratelimit()) 592 netdev_err(mp->dev, 593 "received packet spanning multiple descriptors\n"); 594 } 595 596 if (cmd_sts & ERROR_SUMMARY) 597 stats->rx_errors++; 598 599 dev_kfree_skb(skb); 600 } 601 602 if (rx < budget) 603 mp->work_rx &= ~(1 << rxq->index); 604 605 return rx; 606 } 607 608 static int rxq_refill(struct rx_queue *rxq, int budget) 609 { 610 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 611 int refilled; 612 613 refilled = 0; 614 while (refilled < budget && rxq->rx_desc_count < rxq->rx_ring_size) { 615 struct sk_buff *skb; 616 int rx; 617 struct rx_desc *rx_desc; 618 int size; 619 620 skb = netdev_alloc_skb(mp->dev, mp->skb_size); 621 622 if (skb == NULL) { 623 mp->oom = 1; 624 goto oom; 625 } 626 627 if (SKB_DMA_REALIGN) 628 skb_reserve(skb, SKB_DMA_REALIGN); 629 630 refilled++; 631 rxq->rx_desc_count++; 632 633 rx = rxq->rx_used_desc++; 634 if (rxq->rx_used_desc == rxq->rx_ring_size) 635 rxq->rx_used_desc = 0; 636 637 rx_desc = rxq->rx_desc_area + rx; 638 639 size = skb_end_pointer(skb) - skb->data; 640 rx_desc->buf_ptr = dma_map_single(mp->dev->dev.parent, 641 skb->data, size, 642 DMA_FROM_DEVICE); 643 rx_desc->buf_size = size; 644 rxq->rx_skb[rx] = skb; 645 wmb(); 646 rx_desc->cmd_sts = BUFFER_OWNED_BY_DMA | RX_ENABLE_INTERRUPT; 647 wmb(); 648 649 /* 650 * The hardware automatically prepends 2 bytes of 651 * dummy data to each received packet, so that the 652 * IP header ends up 16-byte aligned. 653 */ 654 skb_reserve(skb, 2); 655 } 656 657 if (refilled < budget) 658 mp->work_rx_refill &= ~(1 << rxq->index); 659 660 oom: 661 return refilled; 662 } 663 664 665 /* tx ***********************************************************************/ 666 static inline unsigned int has_tiny_unaligned_frags(struct sk_buff *skb) 667 { 668 int frag; 669 670 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { 671 const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag]; 672 673 if (skb_frag_size(fragp) <= 8 && fragp->page_offset & 7) 674 return 1; 675 } 676 677 return 0; 678 } 679 680 static inline __be16 sum16_as_be(__sum16 sum) 681 { 682 return (__force __be16)sum; 683 } 684 685 static int skb_tx_csum(struct mv643xx_eth_private *mp, struct sk_buff *skb, 686 u16 *l4i_chk, u32 *command, int length) 687 { 688 int ret; 689 u32 cmd = 0; 690 691 if (skb->ip_summed == CHECKSUM_PARTIAL) { 692 int hdr_len; 693 int tag_bytes; 694 695 BUG_ON(skb->protocol != htons(ETH_P_IP) && 696 skb->protocol != htons(ETH_P_8021Q)); 697 698 hdr_len = (void *)ip_hdr(skb) - (void *)skb->data; 699 tag_bytes = hdr_len - ETH_HLEN; 700 701 if (length - hdr_len > mp->shared->tx_csum_limit || 702 unlikely(tag_bytes & ~12)) { 703 ret = skb_checksum_help(skb); 704 if (!ret) 705 goto no_csum; 706 return ret; 707 } 708 709 if (tag_bytes & 4) 710 cmd |= MAC_HDR_EXTRA_4_BYTES; 711 if (tag_bytes & 8) 712 cmd |= MAC_HDR_EXTRA_8_BYTES; 713 714 cmd |= GEN_TCP_UDP_CHECKSUM | GEN_TCP_UDP_CHK_FULL | 715 GEN_IP_V4_CHECKSUM | 716 ip_hdr(skb)->ihl << TX_IHL_SHIFT; 717 718 /* TODO: Revisit this. With the usage of GEN_TCP_UDP_CHK_FULL 719 * it seems we don't need to pass the initial checksum. */ 720 switch (ip_hdr(skb)->protocol) { 721 case IPPROTO_UDP: 722 cmd |= UDP_FRAME; 723 *l4i_chk = 0; 724 break; 725 case IPPROTO_TCP: 726 *l4i_chk = 0; 727 break; 728 default: 729 WARN(1, "protocol not supported"); 730 } 731 } else { 732 no_csum: 733 /* Errata BTS #50, IHL must be 5 if no HW checksum */ 734 cmd |= 5 << TX_IHL_SHIFT; 735 } 736 *command = cmd; 737 return 0; 738 } 739 740 static inline int 741 txq_put_data_tso(struct net_device *dev, struct tx_queue *txq, 742 struct sk_buff *skb, char *data, int length, 743 bool last_tcp, bool is_last) 744 { 745 int tx_index; 746 u32 cmd_sts; 747 struct tx_desc *desc; 748 749 tx_index = txq->tx_curr_desc++; 750 if (txq->tx_curr_desc == txq->tx_ring_size) 751 txq->tx_curr_desc = 0; 752 desc = &txq->tx_desc_area[tx_index]; 753 754 desc->l4i_chk = 0; 755 desc->byte_cnt = length; 756 desc->buf_ptr = dma_map_single(dev->dev.parent, data, 757 length, DMA_TO_DEVICE); 758 if (unlikely(dma_mapping_error(dev->dev.parent, desc->buf_ptr))) { 759 WARN(1, "dma_map_single failed!\n"); 760 return -ENOMEM; 761 } 762 763 cmd_sts = BUFFER_OWNED_BY_DMA; 764 if (last_tcp) { 765 /* last descriptor in the TCP packet */ 766 cmd_sts |= ZERO_PADDING | TX_LAST_DESC; 767 /* last descriptor in SKB */ 768 if (is_last) 769 cmd_sts |= TX_ENABLE_INTERRUPT; 770 } 771 desc->cmd_sts = cmd_sts; 772 return 0; 773 } 774 775 static inline void 776 txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length) 777 { 778 struct mv643xx_eth_private *mp = txq_to_mp(txq); 779 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 780 int tx_index; 781 struct tx_desc *desc; 782 int ret; 783 u32 cmd_csum = 0; 784 u16 l4i_chk = 0; 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 desc->l4i_chk = 0; 796 797 desc->byte_cnt = hdr_len; 798 desc->buf_ptr = txq->tso_hdrs_dma + 799 txq->tx_curr_desc * TSO_HEADER_SIZE; 800 desc->cmd_sts = cmd_csum | BUFFER_OWNED_BY_DMA | TX_FIRST_DESC | 801 GEN_CRC; 802 803 txq->tx_curr_desc++; 804 if (txq->tx_curr_desc == txq->tx_ring_size) 805 txq->tx_curr_desc = 0; 806 } 807 808 static int txq_submit_tso(struct tx_queue *txq, struct sk_buff *skb, 809 struct net_device *dev) 810 { 811 struct mv643xx_eth_private *mp = txq_to_mp(txq); 812 int total_len, data_left, ret; 813 int desc_count = 0; 814 struct tso_t tso; 815 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 816 817 /* Count needed descriptors */ 818 if ((txq->tx_desc_count + tso_count_descs(skb)) >= txq->tx_ring_size) { 819 netdev_dbg(dev, "not enough descriptors for TSO!\n"); 820 return -EBUSY; 821 } 822 823 /* Initialize the TSO handler, and prepare the first payload */ 824 tso_start(skb, &tso); 825 826 total_len = skb->len - hdr_len; 827 while (total_len > 0) { 828 char *hdr; 829 830 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 831 total_len -= data_left; 832 desc_count++; 833 834 /* prepare packet headers: MAC + IP + TCP */ 835 hdr = txq->tso_hdrs + txq->tx_curr_desc * TSO_HEADER_SIZE; 836 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 837 txq_put_hdr_tso(skb, txq, data_left); 838 839 while (data_left > 0) { 840 int size; 841 desc_count++; 842 843 size = min_t(int, tso.size, data_left); 844 ret = txq_put_data_tso(dev, txq, skb, tso.data, size, 845 size == data_left, 846 total_len == 0); 847 if (ret) 848 goto err_release; 849 data_left -= size; 850 tso_build_data(skb, &tso, size); 851 } 852 } 853 854 __skb_queue_tail(&txq->tx_skb, skb); 855 skb_tx_timestamp(skb); 856 857 /* clear TX_END status */ 858 mp->work_tx_end &= ~(1 << txq->index); 859 860 /* ensure all descriptors are written before poking hardware */ 861 wmb(); 862 txq_enable(txq); 863 txq->tx_desc_count += desc_count; 864 return 0; 865 err_release: 866 /* TODO: Release all used data descriptors; header descriptors must not 867 * be DMA-unmapped. 868 */ 869 return ret; 870 } 871 872 static void txq_submit_frag_skb(struct tx_queue *txq, struct sk_buff *skb) 873 { 874 struct mv643xx_eth_private *mp = txq_to_mp(txq); 875 int nr_frags = skb_shinfo(skb)->nr_frags; 876 int frag; 877 878 for (frag = 0; frag < nr_frags; frag++) { 879 skb_frag_t *this_frag; 880 int tx_index; 881 struct tx_desc *desc; 882 void *addr; 883 884 this_frag = &skb_shinfo(skb)->frags[frag]; 885 addr = page_address(this_frag->page.p) + this_frag->page_offset; 886 tx_index = txq->tx_curr_desc++; 887 if (txq->tx_curr_desc == txq->tx_ring_size) 888 txq->tx_curr_desc = 0; 889 desc = &txq->tx_desc_area[tx_index]; 890 891 /* 892 * The last fragment will generate an interrupt 893 * which will free the skb on TX completion. 894 */ 895 if (frag == nr_frags - 1) { 896 desc->cmd_sts = BUFFER_OWNED_BY_DMA | 897 ZERO_PADDING | TX_LAST_DESC | 898 TX_ENABLE_INTERRUPT; 899 } else { 900 desc->cmd_sts = BUFFER_OWNED_BY_DMA; 901 } 902 903 desc->l4i_chk = 0; 904 desc->byte_cnt = skb_frag_size(this_frag); 905 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, addr, 906 desc->byte_cnt, DMA_TO_DEVICE); 907 } 908 } 909 910 static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb, 911 struct net_device *dev) 912 { 913 struct mv643xx_eth_private *mp = txq_to_mp(txq); 914 int nr_frags = skb_shinfo(skb)->nr_frags; 915 int tx_index; 916 struct tx_desc *desc; 917 u32 cmd_sts; 918 u16 l4i_chk; 919 int length, ret; 920 921 cmd_sts = 0; 922 l4i_chk = 0; 923 924 if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) { 925 if (net_ratelimit()) 926 netdev_err(dev, "tx queue full?!\n"); 927 return -EBUSY; 928 } 929 930 ret = skb_tx_csum(mp, skb, &l4i_chk, &cmd_sts, skb->len); 931 if (ret) 932 return ret; 933 cmd_sts |= TX_FIRST_DESC | GEN_CRC | BUFFER_OWNED_BY_DMA; 934 935 tx_index = txq->tx_curr_desc++; 936 if (txq->tx_curr_desc == txq->tx_ring_size) 937 txq->tx_curr_desc = 0; 938 desc = &txq->tx_desc_area[tx_index]; 939 940 if (nr_frags) { 941 txq_submit_frag_skb(txq, skb); 942 length = skb_headlen(skb); 943 } else { 944 cmd_sts |= ZERO_PADDING | TX_LAST_DESC | TX_ENABLE_INTERRUPT; 945 length = skb->len; 946 } 947 948 desc->l4i_chk = l4i_chk; 949 desc->byte_cnt = length; 950 desc->buf_ptr = dma_map_single(mp->dev->dev.parent, skb->data, 951 length, DMA_TO_DEVICE); 952 953 __skb_queue_tail(&txq->tx_skb, skb); 954 955 skb_tx_timestamp(skb); 956 957 /* ensure all other descriptors are written before first cmd_sts */ 958 wmb(); 959 desc->cmd_sts = cmd_sts; 960 961 /* clear TX_END status */ 962 mp->work_tx_end &= ~(1 << txq->index); 963 964 /* ensure all descriptors are written before poking hardware */ 965 wmb(); 966 txq_enable(txq); 967 968 txq->tx_desc_count += nr_frags + 1; 969 970 return 0; 971 } 972 973 static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev) 974 { 975 struct mv643xx_eth_private *mp = netdev_priv(dev); 976 int length, queue, ret; 977 struct tx_queue *txq; 978 struct netdev_queue *nq; 979 980 queue = skb_get_queue_mapping(skb); 981 txq = mp->txq + queue; 982 nq = netdev_get_tx_queue(dev, queue); 983 984 if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) { 985 netdev_printk(KERN_DEBUG, dev, 986 "failed to linearize skb with tiny unaligned fragment\n"); 987 return NETDEV_TX_BUSY; 988 } 989 990 length = skb->len; 991 992 if (skb_is_gso(skb)) 993 ret = txq_submit_tso(txq, skb, dev); 994 else 995 ret = txq_submit_skb(txq, skb, dev); 996 if (!ret) { 997 txq->tx_bytes += length; 998 txq->tx_packets++; 999 1000 if (txq->tx_desc_count >= txq->tx_stop_threshold) 1001 netif_tx_stop_queue(nq); 1002 } else { 1003 txq->tx_dropped++; 1004 dev_kfree_skb_any(skb); 1005 } 1006 1007 return NETDEV_TX_OK; 1008 } 1009 1010 1011 /* tx napi ******************************************************************/ 1012 static void txq_kick(struct tx_queue *txq) 1013 { 1014 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1015 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1016 u32 hw_desc_ptr; 1017 u32 expected_ptr; 1018 1019 __netif_tx_lock(nq, smp_processor_id()); 1020 1021 if (rdlp(mp, TXQ_COMMAND) & (1 << txq->index)) 1022 goto out; 1023 1024 hw_desc_ptr = rdlp(mp, TXQ_CURRENT_DESC_PTR(txq->index)); 1025 expected_ptr = (u32)txq->tx_desc_dma + 1026 txq->tx_curr_desc * sizeof(struct tx_desc); 1027 1028 if (hw_desc_ptr != expected_ptr) 1029 txq_enable(txq); 1030 1031 out: 1032 __netif_tx_unlock(nq); 1033 1034 mp->work_tx_end &= ~(1 << txq->index); 1035 } 1036 1037 static int txq_reclaim(struct tx_queue *txq, int budget, int force) 1038 { 1039 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1040 struct netdev_queue *nq = netdev_get_tx_queue(mp->dev, txq->index); 1041 int reclaimed; 1042 1043 __netif_tx_lock_bh(nq); 1044 1045 reclaimed = 0; 1046 while (reclaimed < budget && txq->tx_desc_count > 0) { 1047 int tx_index; 1048 struct tx_desc *desc; 1049 u32 cmd_sts; 1050 1051 tx_index = txq->tx_used_desc; 1052 desc = &txq->tx_desc_area[tx_index]; 1053 cmd_sts = desc->cmd_sts; 1054 1055 if (cmd_sts & BUFFER_OWNED_BY_DMA) { 1056 if (!force) 1057 break; 1058 desc->cmd_sts = cmd_sts & ~BUFFER_OWNED_BY_DMA; 1059 } 1060 1061 txq->tx_used_desc = tx_index + 1; 1062 if (txq->tx_used_desc == txq->tx_ring_size) 1063 txq->tx_used_desc = 0; 1064 1065 reclaimed++; 1066 txq->tx_desc_count--; 1067 1068 if (!IS_TSO_HEADER(txq, desc->buf_ptr)) 1069 dma_unmap_single(mp->dev->dev.parent, desc->buf_ptr, 1070 desc->byte_cnt, DMA_TO_DEVICE); 1071 1072 if (cmd_sts & TX_ENABLE_INTERRUPT) { 1073 struct sk_buff *skb = __skb_dequeue(&txq->tx_skb); 1074 1075 if (!WARN_ON(!skb)) 1076 dev_kfree_skb(skb); 1077 } 1078 1079 if (cmd_sts & ERROR_SUMMARY) { 1080 netdev_info(mp->dev, "tx error\n"); 1081 mp->dev->stats.tx_errors++; 1082 } 1083 1084 } 1085 1086 __netif_tx_unlock_bh(nq); 1087 1088 if (reclaimed < budget) 1089 mp->work_tx &= ~(1 << txq->index); 1090 1091 return reclaimed; 1092 } 1093 1094 1095 /* tx rate control **********************************************************/ 1096 /* 1097 * Set total maximum TX rate (shared by all TX queues for this port) 1098 * to 'rate' bits per second, with a maximum burst of 'burst' bytes. 1099 */ 1100 static void tx_set_rate(struct mv643xx_eth_private *mp, int rate, int burst) 1101 { 1102 int token_rate; 1103 int mtu; 1104 int bucket_size; 1105 1106 token_rate = ((rate / 1000) * 64) / (mp->t_clk / 1000); 1107 if (token_rate > 1023) 1108 token_rate = 1023; 1109 1110 mtu = (mp->dev->mtu + 255) >> 8; 1111 if (mtu > 63) 1112 mtu = 63; 1113 1114 bucket_size = (burst + 255) >> 8; 1115 if (bucket_size > 65535) 1116 bucket_size = 65535; 1117 1118 switch (mp->shared->tx_bw_control) { 1119 case TX_BW_CONTROL_OLD_LAYOUT: 1120 wrlp(mp, TX_BW_RATE, token_rate); 1121 wrlp(mp, TX_BW_MTU, mtu); 1122 wrlp(mp, TX_BW_BURST, bucket_size); 1123 break; 1124 case TX_BW_CONTROL_NEW_LAYOUT: 1125 wrlp(mp, TX_BW_RATE_MOVED, token_rate); 1126 wrlp(mp, TX_BW_MTU_MOVED, mtu); 1127 wrlp(mp, TX_BW_BURST_MOVED, bucket_size); 1128 break; 1129 } 1130 } 1131 1132 static void txq_set_rate(struct tx_queue *txq, int rate, int burst) 1133 { 1134 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1135 int token_rate; 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 bucket_size = (burst + 255) >> 8; 1143 if (bucket_size > 65535) 1144 bucket_size = 65535; 1145 1146 wrlp(mp, TXQ_BW_TOKENS(txq->index), token_rate << 14); 1147 wrlp(mp, TXQ_BW_CONF(txq->index), (bucket_size << 10) | token_rate); 1148 } 1149 1150 static void txq_set_fixed_prio_mode(struct tx_queue *txq) 1151 { 1152 struct mv643xx_eth_private *mp = txq_to_mp(txq); 1153 int off; 1154 u32 val; 1155 1156 /* 1157 * Turn on fixed priority mode. 1158 */ 1159 off = 0; 1160 switch (mp->shared->tx_bw_control) { 1161 case TX_BW_CONTROL_OLD_LAYOUT: 1162 off = TXQ_FIX_PRIO_CONF; 1163 break; 1164 case TX_BW_CONTROL_NEW_LAYOUT: 1165 off = TXQ_FIX_PRIO_CONF_MOVED; 1166 break; 1167 } 1168 1169 if (off) { 1170 val = rdlp(mp, off); 1171 val |= 1 << txq->index; 1172 wrlp(mp, off, val); 1173 } 1174 } 1175 1176 1177 /* mii management interface *************************************************/ 1178 static void mv643xx_eth_adjust_link(struct net_device *dev) 1179 { 1180 struct mv643xx_eth_private *mp = netdev_priv(dev); 1181 u32 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 1182 u32 autoneg_disable = FORCE_LINK_PASS | 1183 DISABLE_AUTO_NEG_SPEED_GMII | 1184 DISABLE_AUTO_NEG_FOR_FLOW_CTRL | 1185 DISABLE_AUTO_NEG_FOR_DUPLEX; 1186 1187 if (mp->phy->autoneg == AUTONEG_ENABLE) { 1188 /* enable auto negotiation */ 1189 pscr &= ~autoneg_disable; 1190 goto out_write; 1191 } 1192 1193 pscr |= autoneg_disable; 1194 1195 if (mp->phy->speed == SPEED_1000) { 1196 /* force gigabit, half duplex not supported */ 1197 pscr |= SET_GMII_SPEED_TO_1000; 1198 pscr |= SET_FULL_DUPLEX_MODE; 1199 goto out_write; 1200 } 1201 1202 pscr &= ~SET_GMII_SPEED_TO_1000; 1203 1204 if (mp->phy->speed == SPEED_100) 1205 pscr |= SET_MII_SPEED_TO_100; 1206 else 1207 pscr &= ~SET_MII_SPEED_TO_100; 1208 1209 if (mp->phy->duplex == DUPLEX_FULL) 1210 pscr |= SET_FULL_DUPLEX_MODE; 1211 else 1212 pscr &= ~SET_FULL_DUPLEX_MODE; 1213 1214 out_write: 1215 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 1216 } 1217 1218 /* statistics ***************************************************************/ 1219 static struct net_device_stats *mv643xx_eth_get_stats(struct net_device *dev) 1220 { 1221 struct mv643xx_eth_private *mp = netdev_priv(dev); 1222 struct net_device_stats *stats = &dev->stats; 1223 unsigned long tx_packets = 0; 1224 unsigned long tx_bytes = 0; 1225 unsigned long tx_dropped = 0; 1226 int i; 1227 1228 for (i = 0; i < mp->txq_count; i++) { 1229 struct tx_queue *txq = mp->txq + i; 1230 1231 tx_packets += txq->tx_packets; 1232 tx_bytes += txq->tx_bytes; 1233 tx_dropped += txq->tx_dropped; 1234 } 1235 1236 stats->tx_packets = tx_packets; 1237 stats->tx_bytes = tx_bytes; 1238 stats->tx_dropped = tx_dropped; 1239 1240 return stats; 1241 } 1242 1243 static inline u32 mib_read(struct mv643xx_eth_private *mp, int offset) 1244 { 1245 return rdl(mp, MIB_COUNTERS(mp->port_num) + offset); 1246 } 1247 1248 static void mib_counters_clear(struct mv643xx_eth_private *mp) 1249 { 1250 int i; 1251 1252 for (i = 0; i < 0x80; i += 4) 1253 mib_read(mp, i); 1254 1255 /* Clear non MIB hw counters also */ 1256 rdlp(mp, RX_DISCARD_FRAME_CNT); 1257 rdlp(mp, RX_OVERRUN_FRAME_CNT); 1258 } 1259 1260 static void mib_counters_update(struct mv643xx_eth_private *mp) 1261 { 1262 struct mib_counters *p = &mp->mib_counters; 1263 1264 spin_lock_bh(&mp->mib_counters_lock); 1265 p->good_octets_received += mib_read(mp, 0x00); 1266 p->bad_octets_received += mib_read(mp, 0x08); 1267 p->internal_mac_transmit_err += mib_read(mp, 0x0c); 1268 p->good_frames_received += mib_read(mp, 0x10); 1269 p->bad_frames_received += mib_read(mp, 0x14); 1270 p->broadcast_frames_received += mib_read(mp, 0x18); 1271 p->multicast_frames_received += mib_read(mp, 0x1c); 1272 p->frames_64_octets += mib_read(mp, 0x20); 1273 p->frames_65_to_127_octets += mib_read(mp, 0x24); 1274 p->frames_128_to_255_octets += mib_read(mp, 0x28); 1275 p->frames_256_to_511_octets += mib_read(mp, 0x2c); 1276 p->frames_512_to_1023_octets += mib_read(mp, 0x30); 1277 p->frames_1024_to_max_octets += mib_read(mp, 0x34); 1278 p->good_octets_sent += mib_read(mp, 0x38); 1279 p->good_frames_sent += mib_read(mp, 0x40); 1280 p->excessive_collision += mib_read(mp, 0x44); 1281 p->multicast_frames_sent += mib_read(mp, 0x48); 1282 p->broadcast_frames_sent += mib_read(mp, 0x4c); 1283 p->unrec_mac_control_received += mib_read(mp, 0x50); 1284 p->fc_sent += mib_read(mp, 0x54); 1285 p->good_fc_received += mib_read(mp, 0x58); 1286 p->bad_fc_received += mib_read(mp, 0x5c); 1287 p->undersize_received += mib_read(mp, 0x60); 1288 p->fragments_received += mib_read(mp, 0x64); 1289 p->oversize_received += mib_read(mp, 0x68); 1290 p->jabber_received += mib_read(mp, 0x6c); 1291 p->mac_receive_error += mib_read(mp, 0x70); 1292 p->bad_crc_event += mib_read(mp, 0x74); 1293 p->collision += mib_read(mp, 0x78); 1294 p->late_collision += mib_read(mp, 0x7c); 1295 /* Non MIB hardware counters */ 1296 p->rx_discard += rdlp(mp, RX_DISCARD_FRAME_CNT); 1297 p->rx_overrun += rdlp(mp, RX_OVERRUN_FRAME_CNT); 1298 spin_unlock_bh(&mp->mib_counters_lock); 1299 } 1300 1301 static void mib_counters_timer_wrapper(unsigned long _mp) 1302 { 1303 struct mv643xx_eth_private *mp = (void *)_mp; 1304 mib_counters_update(mp); 1305 mod_timer(&mp->mib_counters_timer, jiffies + 30 * HZ); 1306 } 1307 1308 1309 /* interrupt coalescing *****************************************************/ 1310 /* 1311 * Hardware coalescing parameters are set in units of 64 t_clk 1312 * cycles. I.e.: 1313 * 1314 * coal_delay_in_usec = 64000000 * register_value / t_clk_rate 1315 * 1316 * register_value = coal_delay_in_usec * t_clk_rate / 64000000 1317 * 1318 * In the ->set*() methods, we round the computed register value 1319 * to the nearest integer. 1320 */ 1321 static unsigned int get_rx_coal(struct mv643xx_eth_private *mp) 1322 { 1323 u32 val = rdlp(mp, SDMA_CONFIG); 1324 u64 temp; 1325 1326 if (mp->shared->extended_rx_coal_limit) 1327 temp = ((val & 0x02000000) >> 10) | ((val & 0x003fff80) >> 7); 1328 else 1329 temp = (val & 0x003fff00) >> 8; 1330 1331 temp *= 64000000; 1332 do_div(temp, mp->t_clk); 1333 1334 return (unsigned int)temp; 1335 } 1336 1337 static void set_rx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1338 { 1339 u64 temp; 1340 u32 val; 1341 1342 temp = (u64)usec * mp->t_clk; 1343 temp += 31999999; 1344 do_div(temp, 64000000); 1345 1346 val = rdlp(mp, SDMA_CONFIG); 1347 if (mp->shared->extended_rx_coal_limit) { 1348 if (temp > 0xffff) 1349 temp = 0xffff; 1350 val &= ~0x023fff80; 1351 val |= (temp & 0x8000) << 10; 1352 val |= (temp & 0x7fff) << 7; 1353 } else { 1354 if (temp > 0x3fff) 1355 temp = 0x3fff; 1356 val &= ~0x003fff00; 1357 val |= (temp & 0x3fff) << 8; 1358 } 1359 wrlp(mp, SDMA_CONFIG, val); 1360 } 1361 1362 static unsigned int get_tx_coal(struct mv643xx_eth_private *mp) 1363 { 1364 u64 temp; 1365 1366 temp = (rdlp(mp, TX_FIFO_URGENT_THRESHOLD) & 0x3fff0) >> 4; 1367 temp *= 64000000; 1368 do_div(temp, mp->t_clk); 1369 1370 return (unsigned int)temp; 1371 } 1372 1373 static void set_tx_coal(struct mv643xx_eth_private *mp, unsigned int usec) 1374 { 1375 u64 temp; 1376 1377 temp = (u64)usec * mp->t_clk; 1378 temp += 31999999; 1379 do_div(temp, 64000000); 1380 1381 if (temp > 0x3fff) 1382 temp = 0x3fff; 1383 1384 wrlp(mp, TX_FIFO_URGENT_THRESHOLD, temp << 4); 1385 } 1386 1387 1388 /* ethtool ******************************************************************/ 1389 struct mv643xx_eth_stats { 1390 char stat_string[ETH_GSTRING_LEN]; 1391 int sizeof_stat; 1392 int netdev_off; 1393 int mp_off; 1394 }; 1395 1396 #define SSTAT(m) \ 1397 { #m, FIELD_SIZEOF(struct net_device_stats, m), \ 1398 offsetof(struct net_device, stats.m), -1 } 1399 1400 #define MIBSTAT(m) \ 1401 { #m, FIELD_SIZEOF(struct mib_counters, m), \ 1402 -1, offsetof(struct mv643xx_eth_private, mib_counters.m) } 1403 1404 static const struct mv643xx_eth_stats mv643xx_eth_stats[] = { 1405 SSTAT(rx_packets), 1406 SSTAT(tx_packets), 1407 SSTAT(rx_bytes), 1408 SSTAT(tx_bytes), 1409 SSTAT(rx_errors), 1410 SSTAT(tx_errors), 1411 SSTAT(rx_dropped), 1412 SSTAT(tx_dropped), 1413 MIBSTAT(good_octets_received), 1414 MIBSTAT(bad_octets_received), 1415 MIBSTAT(internal_mac_transmit_err), 1416 MIBSTAT(good_frames_received), 1417 MIBSTAT(bad_frames_received), 1418 MIBSTAT(broadcast_frames_received), 1419 MIBSTAT(multicast_frames_received), 1420 MIBSTAT(frames_64_octets), 1421 MIBSTAT(frames_65_to_127_octets), 1422 MIBSTAT(frames_128_to_255_octets), 1423 MIBSTAT(frames_256_to_511_octets), 1424 MIBSTAT(frames_512_to_1023_octets), 1425 MIBSTAT(frames_1024_to_max_octets), 1426 MIBSTAT(good_octets_sent), 1427 MIBSTAT(good_frames_sent), 1428 MIBSTAT(excessive_collision), 1429 MIBSTAT(multicast_frames_sent), 1430 MIBSTAT(broadcast_frames_sent), 1431 MIBSTAT(unrec_mac_control_received), 1432 MIBSTAT(fc_sent), 1433 MIBSTAT(good_fc_received), 1434 MIBSTAT(bad_fc_received), 1435 MIBSTAT(undersize_received), 1436 MIBSTAT(fragments_received), 1437 MIBSTAT(oversize_received), 1438 MIBSTAT(jabber_received), 1439 MIBSTAT(mac_receive_error), 1440 MIBSTAT(bad_crc_event), 1441 MIBSTAT(collision), 1442 MIBSTAT(late_collision), 1443 MIBSTAT(rx_discard), 1444 MIBSTAT(rx_overrun), 1445 }; 1446 1447 static int 1448 mv643xx_eth_get_settings_phy(struct mv643xx_eth_private *mp, 1449 struct ethtool_cmd *cmd) 1450 { 1451 int err; 1452 1453 err = phy_read_status(mp->phy); 1454 if (err == 0) 1455 err = phy_ethtool_gset(mp->phy, cmd); 1456 1457 /* 1458 * The MAC does not support 1000baseT_Half. 1459 */ 1460 cmd->supported &= ~SUPPORTED_1000baseT_Half; 1461 cmd->advertising &= ~ADVERTISED_1000baseT_Half; 1462 1463 return err; 1464 } 1465 1466 static int 1467 mv643xx_eth_get_settings_phyless(struct mv643xx_eth_private *mp, 1468 struct ethtool_cmd *cmd) 1469 { 1470 u32 port_status; 1471 1472 port_status = rdlp(mp, PORT_STATUS); 1473 1474 cmd->supported = SUPPORTED_MII; 1475 cmd->advertising = ADVERTISED_MII; 1476 switch (port_status & PORT_SPEED_MASK) { 1477 case PORT_SPEED_10: 1478 ethtool_cmd_speed_set(cmd, SPEED_10); 1479 break; 1480 case PORT_SPEED_100: 1481 ethtool_cmd_speed_set(cmd, SPEED_100); 1482 break; 1483 case PORT_SPEED_1000: 1484 ethtool_cmd_speed_set(cmd, SPEED_1000); 1485 break; 1486 default: 1487 cmd->speed = -1; 1488 break; 1489 } 1490 cmd->duplex = (port_status & FULL_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF; 1491 cmd->port = PORT_MII; 1492 cmd->phy_address = 0; 1493 cmd->transceiver = XCVR_INTERNAL; 1494 cmd->autoneg = AUTONEG_DISABLE; 1495 cmd->maxtxpkt = 1; 1496 cmd->maxrxpkt = 1; 1497 1498 return 0; 1499 } 1500 1501 static void 1502 mv643xx_eth_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1503 { 1504 struct mv643xx_eth_private *mp = netdev_priv(dev); 1505 wol->supported = 0; 1506 wol->wolopts = 0; 1507 if (mp->phy) 1508 phy_ethtool_get_wol(mp->phy, wol); 1509 } 1510 1511 static int 1512 mv643xx_eth_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 1513 { 1514 struct mv643xx_eth_private *mp = netdev_priv(dev); 1515 int err; 1516 1517 if (mp->phy == NULL) 1518 return -EOPNOTSUPP; 1519 1520 err = phy_ethtool_set_wol(mp->phy, wol); 1521 /* Given that mv643xx_eth works without the marvell-specific PHY driver, 1522 * this debugging hint is useful to have. 1523 */ 1524 if (err == -EOPNOTSUPP) 1525 netdev_info(dev, "The PHY does not support set_wol, was CONFIG_MARVELL_PHY enabled?\n"); 1526 return err; 1527 } 1528 1529 static int 1530 mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 1531 { 1532 struct mv643xx_eth_private *mp = netdev_priv(dev); 1533 1534 if (mp->phy != NULL) 1535 return mv643xx_eth_get_settings_phy(mp, cmd); 1536 else 1537 return mv643xx_eth_get_settings_phyless(mp, cmd); 1538 } 1539 1540 static int 1541 mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 1542 { 1543 struct mv643xx_eth_private *mp = netdev_priv(dev); 1544 int ret; 1545 1546 if (mp->phy == NULL) 1547 return -EINVAL; 1548 1549 /* 1550 * The MAC does not support 1000baseT_Half. 1551 */ 1552 cmd->advertising &= ~ADVERTISED_1000baseT_Half; 1553 1554 ret = phy_ethtool_sset(mp->phy, cmd); 1555 if (!ret) 1556 mv643xx_eth_adjust_link(dev); 1557 return ret; 1558 } 1559 1560 static void mv643xx_eth_get_drvinfo(struct net_device *dev, 1561 struct ethtool_drvinfo *drvinfo) 1562 { 1563 strlcpy(drvinfo->driver, mv643xx_eth_driver_name, 1564 sizeof(drvinfo->driver)); 1565 strlcpy(drvinfo->version, mv643xx_eth_driver_version, 1566 sizeof(drvinfo->version)); 1567 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 1568 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 1569 drvinfo->n_stats = ARRAY_SIZE(mv643xx_eth_stats); 1570 } 1571 1572 static int mv643xx_eth_nway_reset(struct net_device *dev) 1573 { 1574 struct mv643xx_eth_private *mp = netdev_priv(dev); 1575 1576 if (mp->phy == NULL) 1577 return -EINVAL; 1578 1579 return genphy_restart_aneg(mp->phy); 1580 } 1581 1582 static int 1583 mv643xx_eth_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1584 { 1585 struct mv643xx_eth_private *mp = netdev_priv(dev); 1586 1587 ec->rx_coalesce_usecs = get_rx_coal(mp); 1588 ec->tx_coalesce_usecs = get_tx_coal(mp); 1589 1590 return 0; 1591 } 1592 1593 static int 1594 mv643xx_eth_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) 1595 { 1596 struct mv643xx_eth_private *mp = netdev_priv(dev); 1597 1598 set_rx_coal(mp, ec->rx_coalesce_usecs); 1599 set_tx_coal(mp, ec->tx_coalesce_usecs); 1600 1601 return 0; 1602 } 1603 1604 static void 1605 mv643xx_eth_get_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1606 { 1607 struct mv643xx_eth_private *mp = netdev_priv(dev); 1608 1609 er->rx_max_pending = 4096; 1610 er->tx_max_pending = 4096; 1611 1612 er->rx_pending = mp->rx_ring_size; 1613 er->tx_pending = mp->tx_ring_size; 1614 } 1615 1616 static int 1617 mv643xx_eth_set_ringparam(struct net_device *dev, struct ethtool_ringparam *er) 1618 { 1619 struct mv643xx_eth_private *mp = netdev_priv(dev); 1620 1621 if (er->rx_mini_pending || er->rx_jumbo_pending) 1622 return -EINVAL; 1623 1624 mp->rx_ring_size = er->rx_pending < 4096 ? er->rx_pending : 4096; 1625 mp->tx_ring_size = clamp_t(unsigned int, er->tx_pending, 1626 MV643XX_MAX_SKB_DESCS * 2, 4096); 1627 if (mp->tx_ring_size != er->tx_pending) 1628 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 1629 mp->tx_ring_size, er->tx_pending); 1630 1631 if (netif_running(dev)) { 1632 mv643xx_eth_stop(dev); 1633 if (mv643xx_eth_open(dev)) { 1634 netdev_err(dev, 1635 "fatal error on re-opening device after ring param change\n"); 1636 return -ENOMEM; 1637 } 1638 } 1639 1640 return 0; 1641 } 1642 1643 1644 static int 1645 mv643xx_eth_set_features(struct net_device *dev, netdev_features_t features) 1646 { 1647 struct mv643xx_eth_private *mp = netdev_priv(dev); 1648 bool rx_csum = features & NETIF_F_RXCSUM; 1649 1650 wrlp(mp, PORT_CONFIG, rx_csum ? 0x02000000 : 0x00000000); 1651 1652 return 0; 1653 } 1654 1655 static void mv643xx_eth_get_strings(struct net_device *dev, 1656 uint32_t stringset, uint8_t *data) 1657 { 1658 int i; 1659 1660 if (stringset == ETH_SS_STATS) { 1661 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1662 memcpy(data + i * ETH_GSTRING_LEN, 1663 mv643xx_eth_stats[i].stat_string, 1664 ETH_GSTRING_LEN); 1665 } 1666 } 1667 } 1668 1669 static void mv643xx_eth_get_ethtool_stats(struct net_device *dev, 1670 struct ethtool_stats *stats, 1671 uint64_t *data) 1672 { 1673 struct mv643xx_eth_private *mp = netdev_priv(dev); 1674 int i; 1675 1676 mv643xx_eth_get_stats(dev); 1677 mib_counters_update(mp); 1678 1679 for (i = 0; i < ARRAY_SIZE(mv643xx_eth_stats); i++) { 1680 const struct mv643xx_eth_stats *stat; 1681 void *p; 1682 1683 stat = mv643xx_eth_stats + i; 1684 1685 if (stat->netdev_off >= 0) 1686 p = ((void *)mp->dev) + stat->netdev_off; 1687 else 1688 p = ((void *)mp) + stat->mp_off; 1689 1690 data[i] = (stat->sizeof_stat == 8) ? 1691 *(uint64_t *)p : *(uint32_t *)p; 1692 } 1693 } 1694 1695 static int mv643xx_eth_get_sset_count(struct net_device *dev, int sset) 1696 { 1697 if (sset == ETH_SS_STATS) 1698 return ARRAY_SIZE(mv643xx_eth_stats); 1699 1700 return -EOPNOTSUPP; 1701 } 1702 1703 static const struct ethtool_ops mv643xx_eth_ethtool_ops = { 1704 .get_settings = mv643xx_eth_get_settings, 1705 .set_settings = mv643xx_eth_set_settings, 1706 .get_drvinfo = mv643xx_eth_get_drvinfo, 1707 .nway_reset = mv643xx_eth_nway_reset, 1708 .get_link = ethtool_op_get_link, 1709 .get_coalesce = mv643xx_eth_get_coalesce, 1710 .set_coalesce = mv643xx_eth_set_coalesce, 1711 .get_ringparam = mv643xx_eth_get_ringparam, 1712 .set_ringparam = mv643xx_eth_set_ringparam, 1713 .get_strings = mv643xx_eth_get_strings, 1714 .get_ethtool_stats = mv643xx_eth_get_ethtool_stats, 1715 .get_sset_count = mv643xx_eth_get_sset_count, 1716 .get_ts_info = ethtool_op_get_ts_info, 1717 .get_wol = mv643xx_eth_get_wol, 1718 .set_wol = mv643xx_eth_set_wol, 1719 }; 1720 1721 1722 /* address handling *********************************************************/ 1723 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr) 1724 { 1725 unsigned int mac_h = rdlp(mp, MAC_ADDR_HIGH); 1726 unsigned int mac_l = rdlp(mp, MAC_ADDR_LOW); 1727 1728 addr[0] = (mac_h >> 24) & 0xff; 1729 addr[1] = (mac_h >> 16) & 0xff; 1730 addr[2] = (mac_h >> 8) & 0xff; 1731 addr[3] = mac_h & 0xff; 1732 addr[4] = (mac_l >> 8) & 0xff; 1733 addr[5] = mac_l & 0xff; 1734 } 1735 1736 static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr) 1737 { 1738 wrlp(mp, MAC_ADDR_HIGH, 1739 (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3]); 1740 wrlp(mp, MAC_ADDR_LOW, (addr[4] << 8) | addr[5]); 1741 } 1742 1743 static u32 uc_addr_filter_mask(struct net_device *dev) 1744 { 1745 struct netdev_hw_addr *ha; 1746 u32 nibbles; 1747 1748 if (dev->flags & IFF_PROMISC) 1749 return 0; 1750 1751 nibbles = 1 << (dev->dev_addr[5] & 0x0f); 1752 netdev_for_each_uc_addr(ha, dev) { 1753 if (memcmp(dev->dev_addr, ha->addr, 5)) 1754 return 0; 1755 if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0) 1756 return 0; 1757 1758 nibbles |= 1 << (ha->addr[5] & 0x0f); 1759 } 1760 1761 return nibbles; 1762 } 1763 1764 static void mv643xx_eth_program_unicast_filter(struct net_device *dev) 1765 { 1766 struct mv643xx_eth_private *mp = netdev_priv(dev); 1767 u32 port_config; 1768 u32 nibbles; 1769 int i; 1770 1771 uc_addr_set(mp, dev->dev_addr); 1772 1773 port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE; 1774 1775 nibbles = uc_addr_filter_mask(dev); 1776 if (!nibbles) { 1777 port_config |= UNICAST_PROMISCUOUS_MODE; 1778 nibbles = 0xffff; 1779 } 1780 1781 for (i = 0; i < 16; i += 4) { 1782 int off = UNICAST_TABLE(mp->port_num) + i; 1783 u32 v; 1784 1785 v = 0; 1786 if (nibbles & 1) 1787 v |= 0x00000001; 1788 if (nibbles & 2) 1789 v |= 0x00000100; 1790 if (nibbles & 4) 1791 v |= 0x00010000; 1792 if (nibbles & 8) 1793 v |= 0x01000000; 1794 nibbles >>= 4; 1795 1796 wrl(mp, off, v); 1797 } 1798 1799 wrlp(mp, PORT_CONFIG, port_config); 1800 } 1801 1802 static int addr_crc(unsigned char *addr) 1803 { 1804 int crc = 0; 1805 int i; 1806 1807 for (i = 0; i < 6; i++) { 1808 int j; 1809 1810 crc = (crc ^ addr[i]) << 8; 1811 for (j = 7; j >= 0; j--) { 1812 if (crc & (0x100 << j)) 1813 crc ^= 0x107 << j; 1814 } 1815 } 1816 1817 return crc; 1818 } 1819 1820 static void mv643xx_eth_program_multicast_filter(struct net_device *dev) 1821 { 1822 struct mv643xx_eth_private *mp = netdev_priv(dev); 1823 u32 *mc_spec; 1824 u32 *mc_other; 1825 struct netdev_hw_addr *ha; 1826 int i; 1827 1828 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { 1829 int port_num; 1830 u32 accept; 1831 1832 oom: 1833 port_num = mp->port_num; 1834 accept = 0x01010101; 1835 for (i = 0; i < 0x100; i += 4) { 1836 wrl(mp, SPECIAL_MCAST_TABLE(port_num) + i, accept); 1837 wrl(mp, OTHER_MCAST_TABLE(port_num) + i, accept); 1838 } 1839 return; 1840 } 1841 1842 mc_spec = kmalloc(0x200, GFP_ATOMIC); 1843 if (mc_spec == NULL) 1844 goto oom; 1845 mc_other = mc_spec + (0x100 >> 2); 1846 1847 memset(mc_spec, 0, 0x100); 1848 memset(mc_other, 0, 0x100); 1849 1850 netdev_for_each_mc_addr(ha, dev) { 1851 u8 *a = ha->addr; 1852 u32 *table; 1853 int entry; 1854 1855 if (memcmp(a, "\x01\x00\x5e\x00\x00", 5) == 0) { 1856 table = mc_spec; 1857 entry = a[5]; 1858 } else { 1859 table = mc_other; 1860 entry = addr_crc(a); 1861 } 1862 1863 table[entry >> 2] |= 1 << (8 * (entry & 3)); 1864 } 1865 1866 for (i = 0; i < 0x100; i += 4) { 1867 wrl(mp, SPECIAL_MCAST_TABLE(mp->port_num) + i, mc_spec[i >> 2]); 1868 wrl(mp, OTHER_MCAST_TABLE(mp->port_num) + i, mc_other[i >> 2]); 1869 } 1870 1871 kfree(mc_spec); 1872 } 1873 1874 static void mv643xx_eth_set_rx_mode(struct net_device *dev) 1875 { 1876 mv643xx_eth_program_unicast_filter(dev); 1877 mv643xx_eth_program_multicast_filter(dev); 1878 } 1879 1880 static int mv643xx_eth_set_mac_address(struct net_device *dev, void *addr) 1881 { 1882 struct sockaddr *sa = addr; 1883 1884 if (!is_valid_ether_addr(sa->sa_data)) 1885 return -EADDRNOTAVAIL; 1886 1887 memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); 1888 1889 netif_addr_lock_bh(dev); 1890 mv643xx_eth_program_unicast_filter(dev); 1891 netif_addr_unlock_bh(dev); 1892 1893 return 0; 1894 } 1895 1896 1897 /* rx/tx queue initialisation ***********************************************/ 1898 static int rxq_init(struct mv643xx_eth_private *mp, int index) 1899 { 1900 struct rx_queue *rxq = mp->rxq + index; 1901 struct rx_desc *rx_desc; 1902 int size; 1903 int i; 1904 1905 rxq->index = index; 1906 1907 rxq->rx_ring_size = mp->rx_ring_size; 1908 1909 rxq->rx_desc_count = 0; 1910 rxq->rx_curr_desc = 0; 1911 rxq->rx_used_desc = 0; 1912 1913 size = rxq->rx_ring_size * sizeof(struct rx_desc); 1914 1915 if (index == 0 && size <= mp->rx_desc_sram_size) { 1916 rxq->rx_desc_area = ioremap(mp->rx_desc_sram_addr, 1917 mp->rx_desc_sram_size); 1918 rxq->rx_desc_dma = mp->rx_desc_sram_addr; 1919 } else { 1920 rxq->rx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 1921 size, &rxq->rx_desc_dma, 1922 GFP_KERNEL); 1923 } 1924 1925 if (rxq->rx_desc_area == NULL) { 1926 netdev_err(mp->dev, 1927 "can't allocate rx ring (%d bytes)\n", size); 1928 goto out; 1929 } 1930 memset(rxq->rx_desc_area, 0, size); 1931 1932 rxq->rx_desc_area_size = size; 1933 rxq->rx_skb = kcalloc(rxq->rx_ring_size, sizeof(*rxq->rx_skb), 1934 GFP_KERNEL); 1935 if (rxq->rx_skb == NULL) 1936 goto out_free; 1937 1938 rx_desc = rxq->rx_desc_area; 1939 for (i = 0; i < rxq->rx_ring_size; i++) { 1940 int nexti; 1941 1942 nexti = i + 1; 1943 if (nexti == rxq->rx_ring_size) 1944 nexti = 0; 1945 1946 rx_desc[i].next_desc_ptr = rxq->rx_desc_dma + 1947 nexti * sizeof(struct rx_desc); 1948 } 1949 1950 return 0; 1951 1952 1953 out_free: 1954 if (index == 0 && size <= mp->rx_desc_sram_size) 1955 iounmap(rxq->rx_desc_area); 1956 else 1957 dma_free_coherent(mp->dev->dev.parent, size, 1958 rxq->rx_desc_area, 1959 rxq->rx_desc_dma); 1960 1961 out: 1962 return -ENOMEM; 1963 } 1964 1965 static void rxq_deinit(struct rx_queue *rxq) 1966 { 1967 struct mv643xx_eth_private *mp = rxq_to_mp(rxq); 1968 int i; 1969 1970 rxq_disable(rxq); 1971 1972 for (i = 0; i < rxq->rx_ring_size; i++) { 1973 if (rxq->rx_skb[i]) { 1974 dev_kfree_skb(rxq->rx_skb[i]); 1975 rxq->rx_desc_count--; 1976 } 1977 } 1978 1979 if (rxq->rx_desc_count) { 1980 netdev_err(mp->dev, "error freeing rx ring -- %d skbs stuck\n", 1981 rxq->rx_desc_count); 1982 } 1983 1984 if (rxq->index == 0 && 1985 rxq->rx_desc_area_size <= mp->rx_desc_sram_size) 1986 iounmap(rxq->rx_desc_area); 1987 else 1988 dma_free_coherent(mp->dev->dev.parent, rxq->rx_desc_area_size, 1989 rxq->rx_desc_area, rxq->rx_desc_dma); 1990 1991 kfree(rxq->rx_skb); 1992 } 1993 1994 static int txq_init(struct mv643xx_eth_private *mp, int index) 1995 { 1996 struct tx_queue *txq = mp->txq + index; 1997 struct tx_desc *tx_desc; 1998 int size; 1999 int i; 2000 2001 txq->index = index; 2002 2003 txq->tx_ring_size = mp->tx_ring_size; 2004 2005 /* A queue must always have room for at least one skb. 2006 * Therefore, stop the queue when the free entries reaches 2007 * the maximum number of descriptors per skb. 2008 */ 2009 txq->tx_stop_threshold = txq->tx_ring_size - MV643XX_MAX_SKB_DESCS; 2010 txq->tx_wake_threshold = txq->tx_stop_threshold / 2; 2011 2012 txq->tx_desc_count = 0; 2013 txq->tx_curr_desc = 0; 2014 txq->tx_used_desc = 0; 2015 2016 size = txq->tx_ring_size * sizeof(struct tx_desc); 2017 2018 if (index == 0 && size <= mp->tx_desc_sram_size) { 2019 txq->tx_desc_area = ioremap(mp->tx_desc_sram_addr, 2020 mp->tx_desc_sram_size); 2021 txq->tx_desc_dma = mp->tx_desc_sram_addr; 2022 } else { 2023 txq->tx_desc_area = dma_alloc_coherent(mp->dev->dev.parent, 2024 size, &txq->tx_desc_dma, 2025 GFP_KERNEL); 2026 } 2027 2028 if (txq->tx_desc_area == NULL) { 2029 netdev_err(mp->dev, 2030 "can't allocate tx ring (%d bytes)\n", size); 2031 return -ENOMEM; 2032 } 2033 memset(txq->tx_desc_area, 0, size); 2034 2035 txq->tx_desc_area_size = size; 2036 2037 tx_desc = txq->tx_desc_area; 2038 for (i = 0; i < txq->tx_ring_size; i++) { 2039 struct tx_desc *txd = tx_desc + i; 2040 int nexti; 2041 2042 nexti = i + 1; 2043 if (nexti == txq->tx_ring_size) 2044 nexti = 0; 2045 2046 txd->cmd_sts = 0; 2047 txd->next_desc_ptr = txq->tx_desc_dma + 2048 nexti * sizeof(struct tx_desc); 2049 } 2050 2051 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */ 2052 txq->tso_hdrs = dma_alloc_coherent(mp->dev->dev.parent, 2053 txq->tx_ring_size * TSO_HEADER_SIZE, 2054 &txq->tso_hdrs_dma, GFP_KERNEL); 2055 if (txq->tso_hdrs == NULL) { 2056 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2057 txq->tx_desc_area, txq->tx_desc_dma); 2058 return -ENOMEM; 2059 } 2060 skb_queue_head_init(&txq->tx_skb); 2061 2062 return 0; 2063 } 2064 2065 static void txq_deinit(struct tx_queue *txq) 2066 { 2067 struct mv643xx_eth_private *mp = txq_to_mp(txq); 2068 2069 txq_disable(txq); 2070 txq_reclaim(txq, txq->tx_ring_size, 1); 2071 2072 BUG_ON(txq->tx_used_desc != txq->tx_curr_desc); 2073 2074 if (txq->index == 0 && 2075 txq->tx_desc_area_size <= mp->tx_desc_sram_size) 2076 iounmap(txq->tx_desc_area); 2077 else 2078 dma_free_coherent(mp->dev->dev.parent, txq->tx_desc_area_size, 2079 txq->tx_desc_area, txq->tx_desc_dma); 2080 if (txq->tso_hdrs) 2081 dma_free_coherent(mp->dev->dev.parent, 2082 txq->tx_ring_size * TSO_HEADER_SIZE, 2083 txq->tso_hdrs, txq->tso_hdrs_dma); 2084 } 2085 2086 2087 /* netdev ops and related ***************************************************/ 2088 static int mv643xx_eth_collect_events(struct mv643xx_eth_private *mp) 2089 { 2090 u32 int_cause; 2091 u32 int_cause_ext; 2092 2093 int_cause = rdlp(mp, INT_CAUSE) & mp->int_mask; 2094 if (int_cause == 0) 2095 return 0; 2096 2097 int_cause_ext = 0; 2098 if (int_cause & INT_EXT) { 2099 int_cause &= ~INT_EXT; 2100 int_cause_ext = rdlp(mp, INT_CAUSE_EXT); 2101 } 2102 2103 if (int_cause) { 2104 wrlp(mp, INT_CAUSE, ~int_cause); 2105 mp->work_tx_end |= ((int_cause & INT_TX_END) >> 19) & 2106 ~(rdlp(mp, TXQ_COMMAND) & 0xff); 2107 mp->work_rx |= (int_cause & INT_RX) >> 2; 2108 } 2109 2110 int_cause_ext &= INT_EXT_LINK_PHY | INT_EXT_TX; 2111 if (int_cause_ext) { 2112 wrlp(mp, INT_CAUSE_EXT, ~int_cause_ext); 2113 if (int_cause_ext & INT_EXT_LINK_PHY) 2114 mp->work_link = 1; 2115 mp->work_tx |= int_cause_ext & INT_EXT_TX; 2116 } 2117 2118 return 1; 2119 } 2120 2121 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id) 2122 { 2123 struct net_device *dev = (struct net_device *)dev_id; 2124 struct mv643xx_eth_private *mp = netdev_priv(dev); 2125 2126 if (unlikely(!mv643xx_eth_collect_events(mp))) 2127 return IRQ_NONE; 2128 2129 wrlp(mp, INT_MASK, 0); 2130 napi_schedule(&mp->napi); 2131 2132 return IRQ_HANDLED; 2133 } 2134 2135 static void handle_link_event(struct mv643xx_eth_private *mp) 2136 { 2137 struct net_device *dev = mp->dev; 2138 u32 port_status; 2139 int speed; 2140 int duplex; 2141 int fc; 2142 2143 port_status = rdlp(mp, PORT_STATUS); 2144 if (!(port_status & LINK_UP)) { 2145 if (netif_carrier_ok(dev)) { 2146 int i; 2147 2148 netdev_info(dev, "link down\n"); 2149 2150 netif_carrier_off(dev); 2151 2152 for (i = 0; i < mp->txq_count; i++) { 2153 struct tx_queue *txq = mp->txq + i; 2154 2155 txq_reclaim(txq, txq->tx_ring_size, 1); 2156 txq_reset_hw_ptr(txq); 2157 } 2158 } 2159 return; 2160 } 2161 2162 switch (port_status & PORT_SPEED_MASK) { 2163 case PORT_SPEED_10: 2164 speed = 10; 2165 break; 2166 case PORT_SPEED_100: 2167 speed = 100; 2168 break; 2169 case PORT_SPEED_1000: 2170 speed = 1000; 2171 break; 2172 default: 2173 speed = -1; 2174 break; 2175 } 2176 duplex = (port_status & FULL_DUPLEX) ? 1 : 0; 2177 fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; 2178 2179 netdev_info(dev, "link up, %d Mb/s, %s duplex, flow control %sabled\n", 2180 speed, duplex ? "full" : "half", fc ? "en" : "dis"); 2181 2182 if (!netif_carrier_ok(dev)) 2183 netif_carrier_on(dev); 2184 } 2185 2186 static int mv643xx_eth_poll(struct napi_struct *napi, int budget) 2187 { 2188 struct mv643xx_eth_private *mp; 2189 int work_done; 2190 2191 mp = container_of(napi, struct mv643xx_eth_private, napi); 2192 2193 if (unlikely(mp->oom)) { 2194 mp->oom = 0; 2195 del_timer(&mp->rx_oom); 2196 } 2197 2198 work_done = 0; 2199 while (work_done < budget) { 2200 u8 queue_mask; 2201 int queue; 2202 int work_tbd; 2203 2204 if (mp->work_link) { 2205 mp->work_link = 0; 2206 handle_link_event(mp); 2207 work_done++; 2208 continue; 2209 } 2210 2211 queue_mask = mp->work_tx | mp->work_tx_end | mp->work_rx; 2212 if (likely(!mp->oom)) 2213 queue_mask |= mp->work_rx_refill; 2214 2215 if (!queue_mask) { 2216 if (mv643xx_eth_collect_events(mp)) 2217 continue; 2218 break; 2219 } 2220 2221 queue = fls(queue_mask) - 1; 2222 queue_mask = 1 << queue; 2223 2224 work_tbd = budget - work_done; 2225 if (work_tbd > 16) 2226 work_tbd = 16; 2227 2228 if (mp->work_tx_end & queue_mask) { 2229 txq_kick(mp->txq + queue); 2230 } else if (mp->work_tx & queue_mask) { 2231 work_done += txq_reclaim(mp->txq + queue, work_tbd, 0); 2232 txq_maybe_wake(mp->txq + queue); 2233 } else if (mp->work_rx & queue_mask) { 2234 work_done += rxq_process(mp->rxq + queue, work_tbd); 2235 } else if (!mp->oom && (mp->work_rx_refill & queue_mask)) { 2236 work_done += rxq_refill(mp->rxq + queue, work_tbd); 2237 } else { 2238 BUG(); 2239 } 2240 } 2241 2242 if (work_done < budget) { 2243 if (mp->oom) 2244 mod_timer(&mp->rx_oom, jiffies + (HZ / 10)); 2245 napi_complete(napi); 2246 wrlp(mp, INT_MASK, mp->int_mask); 2247 } 2248 2249 return work_done; 2250 } 2251 2252 static inline void oom_timer_wrapper(unsigned long data) 2253 { 2254 struct mv643xx_eth_private *mp = (void *)data; 2255 2256 napi_schedule(&mp->napi); 2257 } 2258 2259 static void port_start(struct mv643xx_eth_private *mp) 2260 { 2261 u32 pscr; 2262 int i; 2263 2264 /* 2265 * Perform PHY reset, if there is a PHY. 2266 */ 2267 if (mp->phy != NULL) { 2268 struct ethtool_cmd cmd; 2269 2270 mv643xx_eth_get_settings(mp->dev, &cmd); 2271 phy_init_hw(mp->phy); 2272 mv643xx_eth_set_settings(mp->dev, &cmd); 2273 phy_start(mp->phy); 2274 } 2275 2276 /* 2277 * Configure basic link parameters. 2278 */ 2279 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2280 2281 pscr |= SERIAL_PORT_ENABLE; 2282 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2283 2284 pscr |= DO_NOT_FORCE_LINK_FAIL; 2285 if (mp->phy == NULL) 2286 pscr |= FORCE_LINK_PASS; 2287 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2288 2289 /* 2290 * Configure TX path and queues. 2291 */ 2292 tx_set_rate(mp, 1000000000, 16777216); 2293 for (i = 0; i < mp->txq_count; i++) { 2294 struct tx_queue *txq = mp->txq + i; 2295 2296 txq_reset_hw_ptr(txq); 2297 txq_set_rate(txq, 1000000000, 16777216); 2298 txq_set_fixed_prio_mode(txq); 2299 } 2300 2301 /* 2302 * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast 2303 * frames to RX queue #0, and include the pseudo-header when 2304 * calculating receive checksums. 2305 */ 2306 mv643xx_eth_set_features(mp->dev, mp->dev->features); 2307 2308 /* 2309 * Treat BPDUs as normal multicasts, and disable partition mode. 2310 */ 2311 wrlp(mp, PORT_CONFIG_EXT, 0x00000000); 2312 2313 /* 2314 * Add configured unicast addresses to address filter table. 2315 */ 2316 mv643xx_eth_program_unicast_filter(mp->dev); 2317 2318 /* 2319 * Enable the receive queues. 2320 */ 2321 for (i = 0; i < mp->rxq_count; i++) { 2322 struct rx_queue *rxq = mp->rxq + i; 2323 u32 addr; 2324 2325 addr = (u32)rxq->rx_desc_dma; 2326 addr += rxq->rx_curr_desc * sizeof(struct rx_desc); 2327 wrlp(mp, RXQ_CURRENT_DESC_PTR(i), addr); 2328 2329 rxq_enable(rxq); 2330 } 2331 } 2332 2333 static void mv643xx_eth_recalc_skb_size(struct mv643xx_eth_private *mp) 2334 { 2335 int skb_size; 2336 2337 /* 2338 * Reserve 2+14 bytes for an ethernet header (the hardware 2339 * automatically prepends 2 bytes of dummy data to each 2340 * received packet), 16 bytes for up to four VLAN tags, and 2341 * 4 bytes for the trailing FCS -- 36 bytes total. 2342 */ 2343 skb_size = mp->dev->mtu + 36; 2344 2345 /* 2346 * Make sure that the skb size is a multiple of 8 bytes, as 2347 * the lower three bits of the receive descriptor's buffer 2348 * size field are ignored by the hardware. 2349 */ 2350 mp->skb_size = (skb_size + 7) & ~7; 2351 2352 /* 2353 * If NET_SKB_PAD is smaller than a cache line, 2354 * netdev_alloc_skb() will cause skb->data to be misaligned 2355 * to a cache line boundary. If this is the case, include 2356 * some extra space to allow re-aligning the data area. 2357 */ 2358 mp->skb_size += SKB_DMA_REALIGN; 2359 } 2360 2361 static int mv643xx_eth_open(struct net_device *dev) 2362 { 2363 struct mv643xx_eth_private *mp = netdev_priv(dev); 2364 int err; 2365 int i; 2366 2367 wrlp(mp, INT_CAUSE, 0); 2368 wrlp(mp, INT_CAUSE_EXT, 0); 2369 rdlp(mp, INT_CAUSE_EXT); 2370 2371 err = request_irq(dev->irq, mv643xx_eth_irq, 2372 IRQF_SHARED, dev->name, dev); 2373 if (err) { 2374 netdev_err(dev, "can't assign irq\n"); 2375 return -EAGAIN; 2376 } 2377 2378 mv643xx_eth_recalc_skb_size(mp); 2379 2380 napi_enable(&mp->napi); 2381 2382 mp->int_mask = INT_EXT; 2383 2384 for (i = 0; i < mp->rxq_count; i++) { 2385 err = rxq_init(mp, i); 2386 if (err) { 2387 while (--i >= 0) 2388 rxq_deinit(mp->rxq + i); 2389 goto out; 2390 } 2391 2392 rxq_refill(mp->rxq + i, INT_MAX); 2393 mp->int_mask |= INT_RX_0 << i; 2394 } 2395 2396 if (mp->oom) { 2397 mp->rx_oom.expires = jiffies + (HZ / 10); 2398 add_timer(&mp->rx_oom); 2399 } 2400 2401 for (i = 0; i < mp->txq_count; i++) { 2402 err = txq_init(mp, i); 2403 if (err) { 2404 while (--i >= 0) 2405 txq_deinit(mp->txq + i); 2406 goto out_free; 2407 } 2408 mp->int_mask |= INT_TX_END_0 << i; 2409 } 2410 2411 add_timer(&mp->mib_counters_timer); 2412 port_start(mp); 2413 2414 wrlp(mp, INT_MASK_EXT, INT_EXT_LINK_PHY | INT_EXT_TX); 2415 wrlp(mp, INT_MASK, mp->int_mask); 2416 2417 return 0; 2418 2419 2420 out_free: 2421 for (i = 0; i < mp->rxq_count; i++) 2422 rxq_deinit(mp->rxq + i); 2423 out: 2424 free_irq(dev->irq, dev); 2425 2426 return err; 2427 } 2428 2429 static void port_reset(struct mv643xx_eth_private *mp) 2430 { 2431 unsigned int data; 2432 int i; 2433 2434 for (i = 0; i < mp->rxq_count; i++) 2435 rxq_disable(mp->rxq + i); 2436 for (i = 0; i < mp->txq_count; i++) 2437 txq_disable(mp->txq + i); 2438 2439 while (1) { 2440 u32 ps = rdlp(mp, PORT_STATUS); 2441 2442 if ((ps & (TX_IN_PROGRESS | TX_FIFO_EMPTY)) == TX_FIFO_EMPTY) 2443 break; 2444 udelay(10); 2445 } 2446 2447 /* Reset the Enable bit in the Configuration Register */ 2448 data = rdlp(mp, PORT_SERIAL_CONTROL); 2449 data &= ~(SERIAL_PORT_ENABLE | 2450 DO_NOT_FORCE_LINK_FAIL | 2451 FORCE_LINK_PASS); 2452 wrlp(mp, PORT_SERIAL_CONTROL, data); 2453 } 2454 2455 static int mv643xx_eth_stop(struct net_device *dev) 2456 { 2457 struct mv643xx_eth_private *mp = netdev_priv(dev); 2458 int i; 2459 2460 wrlp(mp, INT_MASK_EXT, 0x00000000); 2461 wrlp(mp, INT_MASK, 0x00000000); 2462 rdlp(mp, INT_MASK); 2463 2464 napi_disable(&mp->napi); 2465 2466 del_timer_sync(&mp->rx_oom); 2467 2468 netif_carrier_off(dev); 2469 if (mp->phy) 2470 phy_stop(mp->phy); 2471 free_irq(dev->irq, dev); 2472 2473 port_reset(mp); 2474 mv643xx_eth_get_stats(dev); 2475 mib_counters_update(mp); 2476 del_timer_sync(&mp->mib_counters_timer); 2477 2478 for (i = 0; i < mp->rxq_count; i++) 2479 rxq_deinit(mp->rxq + i); 2480 for (i = 0; i < mp->txq_count; i++) 2481 txq_deinit(mp->txq + i); 2482 2483 return 0; 2484 } 2485 2486 static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2487 { 2488 struct mv643xx_eth_private *mp = netdev_priv(dev); 2489 int ret; 2490 2491 if (mp->phy == NULL) 2492 return -ENOTSUPP; 2493 2494 ret = phy_mii_ioctl(mp->phy, ifr, cmd); 2495 if (!ret) 2496 mv643xx_eth_adjust_link(dev); 2497 return ret; 2498 } 2499 2500 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 2501 { 2502 struct mv643xx_eth_private *mp = netdev_priv(dev); 2503 2504 if (new_mtu < 64 || new_mtu > 9500) 2505 return -EINVAL; 2506 2507 dev->mtu = new_mtu; 2508 mv643xx_eth_recalc_skb_size(mp); 2509 tx_set_rate(mp, 1000000000, 16777216); 2510 2511 if (!netif_running(dev)) 2512 return 0; 2513 2514 /* 2515 * Stop and then re-open the interface. This will allocate RX 2516 * skbs of the new MTU. 2517 * There is a possible danger that the open will not succeed, 2518 * due to memory being full. 2519 */ 2520 mv643xx_eth_stop(dev); 2521 if (mv643xx_eth_open(dev)) { 2522 netdev_err(dev, 2523 "fatal error on re-opening device after MTU change\n"); 2524 } 2525 2526 return 0; 2527 } 2528 2529 static void tx_timeout_task(struct work_struct *ugly) 2530 { 2531 struct mv643xx_eth_private *mp; 2532 2533 mp = container_of(ugly, struct mv643xx_eth_private, tx_timeout_task); 2534 if (netif_running(mp->dev)) { 2535 netif_tx_stop_all_queues(mp->dev); 2536 port_reset(mp); 2537 port_start(mp); 2538 netif_tx_wake_all_queues(mp->dev); 2539 } 2540 } 2541 2542 static void mv643xx_eth_tx_timeout(struct net_device *dev) 2543 { 2544 struct mv643xx_eth_private *mp = netdev_priv(dev); 2545 2546 netdev_info(dev, "tx timeout\n"); 2547 2548 schedule_work(&mp->tx_timeout_task); 2549 } 2550 2551 #ifdef CONFIG_NET_POLL_CONTROLLER 2552 static void mv643xx_eth_netpoll(struct net_device *dev) 2553 { 2554 struct mv643xx_eth_private *mp = netdev_priv(dev); 2555 2556 wrlp(mp, INT_MASK, 0x00000000); 2557 rdlp(mp, INT_MASK); 2558 2559 mv643xx_eth_irq(dev->irq, dev); 2560 2561 wrlp(mp, INT_MASK, mp->int_mask); 2562 } 2563 #endif 2564 2565 2566 /* platform glue ************************************************************/ 2567 static void 2568 mv643xx_eth_conf_mbus_windows(struct mv643xx_eth_shared_private *msp, 2569 const struct mbus_dram_target_info *dram) 2570 { 2571 void __iomem *base = msp->base; 2572 u32 win_enable; 2573 u32 win_protect; 2574 int i; 2575 2576 for (i = 0; i < 6; i++) { 2577 writel(0, base + WINDOW_BASE(i)); 2578 writel(0, base + WINDOW_SIZE(i)); 2579 if (i < 4) 2580 writel(0, base + WINDOW_REMAP_HIGH(i)); 2581 } 2582 2583 win_enable = 0x3f; 2584 win_protect = 0; 2585 2586 for (i = 0; i < dram->num_cs; i++) { 2587 const struct mbus_dram_window *cs = dram->cs + i; 2588 2589 writel((cs->base & 0xffff0000) | 2590 (cs->mbus_attr << 8) | 2591 dram->mbus_dram_target_id, base + WINDOW_BASE(i)); 2592 writel((cs->size - 1) & 0xffff0000, base + WINDOW_SIZE(i)); 2593 2594 win_enable &= ~(1 << i); 2595 win_protect |= 3 << (2 * i); 2596 } 2597 2598 writel(win_enable, base + WINDOW_BAR_ENABLE); 2599 msp->win_protect = win_protect; 2600 } 2601 2602 static void infer_hw_params(struct mv643xx_eth_shared_private *msp) 2603 { 2604 /* 2605 * Check whether we have a 14-bit coal limit field in bits 2606 * [21:8], or a 16-bit coal limit in bits [25,21:7] of the 2607 * SDMA config register. 2608 */ 2609 writel(0x02000000, msp->base + 0x0400 + SDMA_CONFIG); 2610 if (readl(msp->base + 0x0400 + SDMA_CONFIG) & 0x02000000) 2611 msp->extended_rx_coal_limit = 1; 2612 else 2613 msp->extended_rx_coal_limit = 0; 2614 2615 /* 2616 * Check whether the MAC supports TX rate control, and if 2617 * yes, whether its associated registers are in the old or 2618 * the new place. 2619 */ 2620 writel(1, msp->base + 0x0400 + TX_BW_MTU_MOVED); 2621 if (readl(msp->base + 0x0400 + TX_BW_MTU_MOVED) & 1) { 2622 msp->tx_bw_control = TX_BW_CONTROL_NEW_LAYOUT; 2623 } else { 2624 writel(7, msp->base + 0x0400 + TX_BW_RATE); 2625 if (readl(msp->base + 0x0400 + TX_BW_RATE) & 7) 2626 msp->tx_bw_control = TX_BW_CONTROL_OLD_LAYOUT; 2627 else 2628 msp->tx_bw_control = TX_BW_CONTROL_ABSENT; 2629 } 2630 } 2631 2632 #if defined(CONFIG_OF) 2633 static const struct of_device_id mv643xx_eth_shared_ids[] = { 2634 { .compatible = "marvell,orion-eth", }, 2635 { .compatible = "marvell,kirkwood-eth", }, 2636 { } 2637 }; 2638 MODULE_DEVICE_TABLE(of, mv643xx_eth_shared_ids); 2639 #endif 2640 2641 #if defined(CONFIG_OF) && !defined(CONFIG_MV64X60) 2642 #define mv643xx_eth_property(_np, _name, _v) \ 2643 do { \ 2644 u32 tmp; \ 2645 if (!of_property_read_u32(_np, "marvell," _name, &tmp)) \ 2646 _v = tmp; \ 2647 } while (0) 2648 2649 static struct platform_device *port_platdev[3]; 2650 2651 static int mv643xx_eth_shared_of_add_port(struct platform_device *pdev, 2652 struct device_node *pnp) 2653 { 2654 struct platform_device *ppdev; 2655 struct mv643xx_eth_platform_data ppd; 2656 struct resource res; 2657 const char *mac_addr; 2658 int ret; 2659 int dev_num = 0; 2660 2661 memset(&ppd, 0, sizeof(ppd)); 2662 ppd.shared = pdev; 2663 2664 memset(&res, 0, sizeof(res)); 2665 if (!of_irq_to_resource(pnp, 0, &res)) { 2666 dev_err(&pdev->dev, "missing interrupt on %s\n", pnp->name); 2667 return -EINVAL; 2668 } 2669 2670 if (of_property_read_u32(pnp, "reg", &ppd.port_number)) { 2671 dev_err(&pdev->dev, "missing reg property on %s\n", pnp->name); 2672 return -EINVAL; 2673 } 2674 2675 if (ppd.port_number >= 3) { 2676 dev_err(&pdev->dev, "invalid reg property on %s\n", pnp->name); 2677 return -EINVAL; 2678 } 2679 2680 while (dev_num < 3 && port_platdev[dev_num]) 2681 dev_num++; 2682 2683 if (dev_num == 3) { 2684 dev_err(&pdev->dev, "too many ports registered\n"); 2685 return -EINVAL; 2686 } 2687 2688 mac_addr = of_get_mac_address(pnp); 2689 if (mac_addr) 2690 memcpy(ppd.mac_addr, mac_addr, ETH_ALEN); 2691 2692 mv643xx_eth_property(pnp, "tx-queue-size", ppd.tx_queue_size); 2693 mv643xx_eth_property(pnp, "tx-sram-addr", ppd.tx_sram_addr); 2694 mv643xx_eth_property(pnp, "tx-sram-size", ppd.tx_sram_size); 2695 mv643xx_eth_property(pnp, "rx-queue-size", ppd.rx_queue_size); 2696 mv643xx_eth_property(pnp, "rx-sram-addr", ppd.rx_sram_addr); 2697 mv643xx_eth_property(pnp, "rx-sram-size", ppd.rx_sram_size); 2698 2699 ppd.phy_node = of_parse_phandle(pnp, "phy-handle", 0); 2700 if (!ppd.phy_node) { 2701 ppd.phy_addr = MV643XX_ETH_PHY_NONE; 2702 of_property_read_u32(pnp, "speed", &ppd.speed); 2703 of_property_read_u32(pnp, "duplex", &ppd.duplex); 2704 } 2705 2706 ppdev = platform_device_alloc(MV643XX_ETH_NAME, dev_num); 2707 if (!ppdev) 2708 return -ENOMEM; 2709 ppdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 2710 ppdev->dev.of_node = pnp; 2711 2712 ret = platform_device_add_resources(ppdev, &res, 1); 2713 if (ret) 2714 goto port_err; 2715 2716 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); 2717 if (ret) 2718 goto port_err; 2719 2720 ret = platform_device_add(ppdev); 2721 if (ret) 2722 goto port_err; 2723 2724 port_platdev[dev_num] = ppdev; 2725 2726 return 0; 2727 2728 port_err: 2729 platform_device_put(ppdev); 2730 return ret; 2731 } 2732 2733 static int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2734 { 2735 struct mv643xx_eth_shared_platform_data *pd; 2736 struct device_node *pnp, *np = pdev->dev.of_node; 2737 int ret; 2738 2739 /* bail out if not registered from DT */ 2740 if (!np) 2741 return 0; 2742 2743 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL); 2744 if (!pd) 2745 return -ENOMEM; 2746 pdev->dev.platform_data = pd; 2747 2748 mv643xx_eth_property(np, "tx-checksum-limit", pd->tx_csum_limit); 2749 2750 for_each_available_child_of_node(np, pnp) { 2751 ret = mv643xx_eth_shared_of_add_port(pdev, pnp); 2752 if (ret) 2753 return ret; 2754 } 2755 return 0; 2756 } 2757 2758 static void mv643xx_eth_shared_of_remove(void) 2759 { 2760 int n; 2761 2762 for (n = 0; n < 3; n++) { 2763 platform_device_del(port_platdev[n]); 2764 port_platdev[n] = NULL; 2765 } 2766 } 2767 #else 2768 static inline int mv643xx_eth_shared_of_probe(struct platform_device *pdev) 2769 { 2770 return 0; 2771 } 2772 2773 static inline void mv643xx_eth_shared_of_remove(void) 2774 { 2775 } 2776 #endif 2777 2778 static int mv643xx_eth_shared_probe(struct platform_device *pdev) 2779 { 2780 static int mv643xx_eth_version_printed; 2781 struct mv643xx_eth_shared_platform_data *pd; 2782 struct mv643xx_eth_shared_private *msp; 2783 const struct mbus_dram_target_info *dram; 2784 struct resource *res; 2785 int ret; 2786 2787 if (!mv643xx_eth_version_printed++) 2788 pr_notice("MV-643xx 10/100/1000 ethernet driver version %s\n", 2789 mv643xx_eth_driver_version); 2790 2791 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2792 if (res == NULL) 2793 return -EINVAL; 2794 2795 msp = devm_kzalloc(&pdev->dev, sizeof(*msp), GFP_KERNEL); 2796 if (msp == NULL) 2797 return -ENOMEM; 2798 platform_set_drvdata(pdev, msp); 2799 2800 msp->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); 2801 if (msp->base == NULL) 2802 return -ENOMEM; 2803 2804 msp->clk = devm_clk_get(&pdev->dev, NULL); 2805 if (!IS_ERR(msp->clk)) 2806 clk_prepare_enable(msp->clk); 2807 2808 /* 2809 * (Re-)program MBUS remapping windows if we are asked to. 2810 */ 2811 dram = mv_mbus_dram_info(); 2812 if (dram) 2813 mv643xx_eth_conf_mbus_windows(msp, dram); 2814 2815 ret = mv643xx_eth_shared_of_probe(pdev); 2816 if (ret) 2817 return ret; 2818 pd = dev_get_platdata(&pdev->dev); 2819 2820 msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? 2821 pd->tx_csum_limit : 9 * 1024; 2822 infer_hw_params(msp); 2823 2824 return 0; 2825 } 2826 2827 static int mv643xx_eth_shared_remove(struct platform_device *pdev) 2828 { 2829 struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev); 2830 2831 mv643xx_eth_shared_of_remove(); 2832 if (!IS_ERR(msp->clk)) 2833 clk_disable_unprepare(msp->clk); 2834 return 0; 2835 } 2836 2837 static struct platform_driver mv643xx_eth_shared_driver = { 2838 .probe = mv643xx_eth_shared_probe, 2839 .remove = mv643xx_eth_shared_remove, 2840 .driver = { 2841 .name = MV643XX_ETH_SHARED_NAME, 2842 .of_match_table = of_match_ptr(mv643xx_eth_shared_ids), 2843 }, 2844 }; 2845 2846 static void phy_addr_set(struct mv643xx_eth_private *mp, int phy_addr) 2847 { 2848 int addr_shift = 5 * mp->port_num; 2849 u32 data; 2850 2851 data = rdl(mp, PHY_ADDR); 2852 data &= ~(0x1f << addr_shift); 2853 data |= (phy_addr & 0x1f) << addr_shift; 2854 wrl(mp, PHY_ADDR, data); 2855 } 2856 2857 static int phy_addr_get(struct mv643xx_eth_private *mp) 2858 { 2859 unsigned int data; 2860 2861 data = rdl(mp, PHY_ADDR); 2862 2863 return (data >> (5 * mp->port_num)) & 0x1f; 2864 } 2865 2866 static void set_params(struct mv643xx_eth_private *mp, 2867 struct mv643xx_eth_platform_data *pd) 2868 { 2869 struct net_device *dev = mp->dev; 2870 unsigned int tx_ring_size; 2871 2872 if (is_valid_ether_addr(pd->mac_addr)) 2873 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN); 2874 else 2875 uc_addr_get(mp, dev->dev_addr); 2876 2877 mp->rx_ring_size = DEFAULT_RX_QUEUE_SIZE; 2878 if (pd->rx_queue_size) 2879 mp->rx_ring_size = pd->rx_queue_size; 2880 mp->rx_desc_sram_addr = pd->rx_sram_addr; 2881 mp->rx_desc_sram_size = pd->rx_sram_size; 2882 2883 mp->rxq_count = pd->rx_queue_count ? : 1; 2884 2885 tx_ring_size = DEFAULT_TX_QUEUE_SIZE; 2886 if (pd->tx_queue_size) 2887 tx_ring_size = pd->tx_queue_size; 2888 2889 mp->tx_ring_size = clamp_t(unsigned int, tx_ring_size, 2890 MV643XX_MAX_SKB_DESCS * 2, 4096); 2891 if (mp->tx_ring_size != tx_ring_size) 2892 netdev_warn(dev, "TX queue size set to %u (requested %u)\n", 2893 mp->tx_ring_size, tx_ring_size); 2894 2895 mp->tx_desc_sram_addr = pd->tx_sram_addr; 2896 mp->tx_desc_sram_size = pd->tx_sram_size; 2897 2898 mp->txq_count = pd->tx_queue_count ? : 1; 2899 } 2900 2901 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp, 2902 int phy_addr) 2903 { 2904 struct phy_device *phydev; 2905 int start; 2906 int num; 2907 int i; 2908 char phy_id[MII_BUS_ID_SIZE + 3]; 2909 2910 if (phy_addr == MV643XX_ETH_PHY_ADDR_DEFAULT) { 2911 start = phy_addr_get(mp) & 0x1f; 2912 num = 32; 2913 } else { 2914 start = phy_addr & 0x1f; 2915 num = 1; 2916 } 2917 2918 /* Attempt to connect to the PHY using orion-mdio */ 2919 phydev = ERR_PTR(-ENODEV); 2920 for (i = 0; i < num; i++) { 2921 int addr = (start + i) & 0x1f; 2922 2923 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, 2924 "orion-mdio-mii", addr); 2925 2926 phydev = phy_connect(mp->dev, phy_id, mv643xx_eth_adjust_link, 2927 PHY_INTERFACE_MODE_GMII); 2928 if (!IS_ERR(phydev)) { 2929 phy_addr_set(mp, addr); 2930 break; 2931 } 2932 } 2933 2934 return phydev; 2935 } 2936 2937 static void phy_init(struct mv643xx_eth_private *mp, int speed, int duplex) 2938 { 2939 struct phy_device *phy = mp->phy; 2940 2941 if (speed == 0) { 2942 phy->autoneg = AUTONEG_ENABLE; 2943 phy->speed = 0; 2944 phy->duplex = 0; 2945 phy->advertising = phy->supported | ADVERTISED_Autoneg; 2946 } else { 2947 phy->autoneg = AUTONEG_DISABLE; 2948 phy->advertising = 0; 2949 phy->speed = speed; 2950 phy->duplex = duplex; 2951 } 2952 phy_start_aneg(phy); 2953 } 2954 2955 static void init_pscr(struct mv643xx_eth_private *mp, int speed, int duplex) 2956 { 2957 u32 pscr; 2958 2959 pscr = rdlp(mp, PORT_SERIAL_CONTROL); 2960 if (pscr & SERIAL_PORT_ENABLE) { 2961 pscr &= ~SERIAL_PORT_ENABLE; 2962 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2963 } 2964 2965 pscr = MAX_RX_PACKET_9700BYTE | SERIAL_PORT_CONTROL_RESERVED; 2966 if (mp->phy == NULL) { 2967 pscr |= DISABLE_AUTO_NEG_SPEED_GMII; 2968 if (speed == SPEED_1000) 2969 pscr |= SET_GMII_SPEED_TO_1000; 2970 else if (speed == SPEED_100) 2971 pscr |= SET_MII_SPEED_TO_100; 2972 2973 pscr |= DISABLE_AUTO_NEG_FOR_FLOW_CTRL; 2974 2975 pscr |= DISABLE_AUTO_NEG_FOR_DUPLEX; 2976 if (duplex == DUPLEX_FULL) 2977 pscr |= SET_FULL_DUPLEX_MODE; 2978 } 2979 2980 wrlp(mp, PORT_SERIAL_CONTROL, pscr); 2981 } 2982 2983 static const struct net_device_ops mv643xx_eth_netdev_ops = { 2984 .ndo_open = mv643xx_eth_open, 2985 .ndo_stop = mv643xx_eth_stop, 2986 .ndo_start_xmit = mv643xx_eth_xmit, 2987 .ndo_set_rx_mode = mv643xx_eth_set_rx_mode, 2988 .ndo_set_mac_address = mv643xx_eth_set_mac_address, 2989 .ndo_validate_addr = eth_validate_addr, 2990 .ndo_do_ioctl = mv643xx_eth_ioctl, 2991 .ndo_change_mtu = mv643xx_eth_change_mtu, 2992 .ndo_set_features = mv643xx_eth_set_features, 2993 .ndo_tx_timeout = mv643xx_eth_tx_timeout, 2994 .ndo_get_stats = mv643xx_eth_get_stats, 2995 #ifdef CONFIG_NET_POLL_CONTROLLER 2996 .ndo_poll_controller = mv643xx_eth_netpoll, 2997 #endif 2998 }; 2999 3000 static int mv643xx_eth_probe(struct platform_device *pdev) 3001 { 3002 struct mv643xx_eth_platform_data *pd; 3003 struct mv643xx_eth_private *mp; 3004 struct net_device *dev; 3005 struct resource *res; 3006 int err; 3007 3008 pd = dev_get_platdata(&pdev->dev); 3009 if (pd == NULL) { 3010 dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); 3011 return -ENODEV; 3012 } 3013 3014 if (pd->shared == NULL) { 3015 dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); 3016 return -ENODEV; 3017 } 3018 3019 dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); 3020 if (!dev) 3021 return -ENOMEM; 3022 3023 mp = netdev_priv(dev); 3024 platform_set_drvdata(pdev, mp); 3025 3026 mp->shared = platform_get_drvdata(pd->shared); 3027 mp->base = mp->shared->base + 0x0400 + (pd->port_number << 10); 3028 mp->port_num = pd->port_number; 3029 3030 mp->dev = dev; 3031 3032 /* Kirkwood resets some registers on gated clocks. Especially 3033 * CLK125_BYPASS_EN must be cleared but is not available on 3034 * all other SoCs/System Controllers using this driver. 3035 */ 3036 if (of_device_is_compatible(pdev->dev.of_node, 3037 "marvell,kirkwood-eth-port")) 3038 wrlp(mp, PORT_SERIAL_CONTROL1, 3039 rdlp(mp, PORT_SERIAL_CONTROL1) & ~CLK125_BYPASS_EN); 3040 3041 /* 3042 * Start with a default rate, and if there is a clock, allow 3043 * it to override the default. 3044 */ 3045 mp->t_clk = 133000000; 3046 mp->clk = devm_clk_get(&pdev->dev, NULL); 3047 if (!IS_ERR(mp->clk)) { 3048 clk_prepare_enable(mp->clk); 3049 mp->t_clk = clk_get_rate(mp->clk); 3050 } else if (!IS_ERR(mp->shared->clk)) { 3051 mp->t_clk = clk_get_rate(mp->shared->clk); 3052 } 3053 3054 set_params(mp, pd); 3055 netif_set_real_num_tx_queues(dev, mp->txq_count); 3056 netif_set_real_num_rx_queues(dev, mp->rxq_count); 3057 3058 err = 0; 3059 if (pd->phy_node) { 3060 mp->phy = of_phy_connect(mp->dev, pd->phy_node, 3061 mv643xx_eth_adjust_link, 0, 3062 PHY_INTERFACE_MODE_GMII); 3063 if (!mp->phy) 3064 err = -ENODEV; 3065 else 3066 phy_addr_set(mp, mp->phy->addr); 3067 } else if (pd->phy_addr != MV643XX_ETH_PHY_NONE) { 3068 mp->phy = phy_scan(mp, pd->phy_addr); 3069 3070 if (IS_ERR(mp->phy)) 3071 err = PTR_ERR(mp->phy); 3072 else 3073 phy_init(mp, pd->speed, pd->duplex); 3074 } 3075 if (err == -ENODEV) { 3076 err = -EPROBE_DEFER; 3077 goto out; 3078 } 3079 if (err) 3080 goto out; 3081 3082 dev->ethtool_ops = &mv643xx_eth_ethtool_ops; 3083 3084 init_pscr(mp, pd->speed, pd->duplex); 3085 3086 3087 mib_counters_clear(mp); 3088 3089 init_timer(&mp->mib_counters_timer); 3090 mp->mib_counters_timer.data = (unsigned long)mp; 3091 mp->mib_counters_timer.function = mib_counters_timer_wrapper; 3092 mp->mib_counters_timer.expires = jiffies + 30 * HZ; 3093 3094 spin_lock_init(&mp->mib_counters_lock); 3095 3096 INIT_WORK(&mp->tx_timeout_task, tx_timeout_task); 3097 3098 netif_napi_add(dev, &mp->napi, mv643xx_eth_poll, NAPI_POLL_WEIGHT); 3099 3100 init_timer(&mp->rx_oom); 3101 mp->rx_oom.data = (unsigned long)mp; 3102 mp->rx_oom.function = oom_timer_wrapper; 3103 3104 3105 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 3106 BUG_ON(!res); 3107 dev->irq = res->start; 3108 3109 dev->netdev_ops = &mv643xx_eth_netdev_ops; 3110 3111 dev->watchdog_timeo = 2 * HZ; 3112 dev->base_addr = 0; 3113 3114 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO; 3115 dev->vlan_features = dev->features; 3116 3117 dev->features |= NETIF_F_RXCSUM; 3118 dev->hw_features = dev->features; 3119 3120 dev->priv_flags |= IFF_UNICAST_FLT; 3121 dev->gso_max_segs = MV643XX_MAX_TSO_SEGS; 3122 3123 SET_NETDEV_DEV(dev, &pdev->dev); 3124 3125 if (mp->shared->win_protect) 3126 wrl(mp, WINDOW_PROTECT(mp->port_num), mp->shared->win_protect); 3127 3128 netif_carrier_off(dev); 3129 3130 wrlp(mp, SDMA_CONFIG, PORT_SDMA_CONFIG_DEFAULT_VALUE); 3131 3132 set_rx_coal(mp, 250); 3133 set_tx_coal(mp, 0); 3134 3135 err = register_netdev(dev); 3136 if (err) 3137 goto out; 3138 3139 netdev_notice(dev, "port %d with MAC address %pM\n", 3140 mp->port_num, dev->dev_addr); 3141 3142 if (mp->tx_desc_sram_size > 0) 3143 netdev_notice(dev, "configured with sram\n"); 3144 3145 return 0; 3146 3147 out: 3148 if (!IS_ERR(mp->clk)) 3149 clk_disable_unprepare(mp->clk); 3150 free_netdev(dev); 3151 3152 return err; 3153 } 3154 3155 static int mv643xx_eth_remove(struct platform_device *pdev) 3156 { 3157 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3158 3159 unregister_netdev(mp->dev); 3160 if (mp->phy != NULL) 3161 phy_disconnect(mp->phy); 3162 cancel_work_sync(&mp->tx_timeout_task); 3163 3164 if (!IS_ERR(mp->clk)) 3165 clk_disable_unprepare(mp->clk); 3166 3167 free_netdev(mp->dev); 3168 3169 return 0; 3170 } 3171 3172 static void mv643xx_eth_shutdown(struct platform_device *pdev) 3173 { 3174 struct mv643xx_eth_private *mp = platform_get_drvdata(pdev); 3175 3176 /* Mask all interrupts on ethernet port */ 3177 wrlp(mp, INT_MASK, 0); 3178 rdlp(mp, INT_MASK); 3179 3180 if (netif_running(mp->dev)) 3181 port_reset(mp); 3182 } 3183 3184 static struct platform_driver mv643xx_eth_driver = { 3185 .probe = mv643xx_eth_probe, 3186 .remove = mv643xx_eth_remove, 3187 .shutdown = mv643xx_eth_shutdown, 3188 .driver = { 3189 .name = MV643XX_ETH_NAME, 3190 }, 3191 }; 3192 3193 static int __init mv643xx_eth_init_module(void) 3194 { 3195 int rc; 3196 3197 rc = platform_driver_register(&mv643xx_eth_shared_driver); 3198 if (!rc) { 3199 rc = platform_driver_register(&mv643xx_eth_driver); 3200 if (rc) 3201 platform_driver_unregister(&mv643xx_eth_shared_driver); 3202 } 3203 3204 return rc; 3205 } 3206 module_init(mv643xx_eth_init_module); 3207 3208 static void __exit mv643xx_eth_cleanup_module(void) 3209 { 3210 platform_driver_unregister(&mv643xx_eth_driver); 3211 platform_driver_unregister(&mv643xx_eth_shared_driver); 3212 } 3213 module_exit(mv643xx_eth_cleanup_module); 3214 3215 MODULE_AUTHOR("Rabeeh Khoury, Assaf Hoffman, Matthew Dharm, " 3216 "Manish Lachwani, Dale Farnsworth and Lennert Buytenhek"); 3217 MODULE_DESCRIPTION("Ethernet driver for Marvell MV643XX"); 3218 MODULE_LICENSE("GPL"); 3219 MODULE_ALIAS("platform:" MV643XX_ETH_SHARED_NAME); 3220 MODULE_ALIAS("platform:" MV643XX_ETH_NAME); 3221