1 /* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */ 2 /* 3 Written 1997-2001 by Donald Becker. 4 5 This software may be used and distributed according to the terms of 6 the GNU General Public License (GPL), incorporated herein by reference. 7 Drivers based on or derived from this code fall under the GPL and must 8 retain the authorship, copyright and license notice. This file is not 9 a complete program and may only be used when the entire operating 10 system is licensed under the GPL. 11 12 This driver is for the Packet Engines G-NIC PCI Gigabit Ethernet adapter. 13 It also supports the Symbios Logic version of the same chip core. 14 15 The author may be reached as becker@scyld.com, or C/O 16 Scyld Computing Corporation 17 410 Severn Ave., Suite 210 18 Annapolis MD 21403 19 20 Support and updates available at 21 http://www.scyld.com/network/yellowfin.html 22 [link no longer provides useful info -jgarzik] 23 24 */ 25 26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 27 28 #define DRV_NAME "yellowfin" 29 #define DRV_VERSION "2.1" 30 #define DRV_RELDATE "Sep 11, 2006" 31 32 /* The user-configurable values. 33 These may be modified when a driver module is loaded.*/ 34 35 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ 36 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ 37 static int max_interrupt_work = 20; 38 static int mtu; 39 #ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ 40 /* System-wide count of bogus-rx frames. */ 41 static int bogus_rx; 42 static int dma_ctrl = 0x004A0263; /* Constrained by errata */ 43 static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ 44 #elif defined(YF_NEW) /* A future perfect board :->. */ 45 static int dma_ctrl = 0x00CAC277; /* Override when loading module! */ 46 static int fifo_cfg = 0x0028; 47 #else 48 static const int dma_ctrl = 0x004A0263; /* Constrained by errata */ 49 static const int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ 50 #endif 51 52 /* Set the copy breakpoint for the copy-only-tiny-frames scheme. 53 Setting to > 1514 effectively disables this feature. */ 54 static int rx_copybreak; 55 56 /* Used to pass the media type, etc. 57 No media types are currently defined. These exist for driver 58 interoperability. 59 */ 60 #define MAX_UNITS 8 /* More are supported, limit only on options */ 61 static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; 62 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; 63 64 /* Do ugly workaround for GX server chipset errata. */ 65 static int gx_fix; 66 67 /* Operational parameters that are set at compile time. */ 68 69 /* Keep the ring sizes a power of two for efficiency. 70 Making the Tx ring too long decreases the effectiveness of channel 71 bonding and packet priority. 72 There are no ill effects from too-large receive rings. */ 73 #define TX_RING_SIZE 16 74 #define TX_QUEUE_SIZE 12 /* Must be > 4 && <= TX_RING_SIZE */ 75 #define RX_RING_SIZE 64 76 #define STATUS_TOTAL_SIZE TX_RING_SIZE*sizeof(struct tx_status_words) 77 #define TX_TOTAL_SIZE 2*TX_RING_SIZE*sizeof(struct yellowfin_desc) 78 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct yellowfin_desc) 79 80 /* Operational parameters that usually are not changed. */ 81 /* Time in jiffies before concluding the transmitter is hung. */ 82 #define TX_TIMEOUT (2*HZ) 83 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ 84 85 #define yellowfin_debug debug 86 87 #include <linux/module.h> 88 #include <linux/kernel.h> 89 #include <linux/string.h> 90 #include <linux/timer.h> 91 #include <linux/errno.h> 92 #include <linux/ioport.h> 93 #include <linux/interrupt.h> 94 #include <linux/pci.h> 95 #include <linux/init.h> 96 #include <linux/mii.h> 97 #include <linux/netdevice.h> 98 #include <linux/etherdevice.h> 99 #include <linux/skbuff.h> 100 #include <linux/ethtool.h> 101 #include <linux/crc32.h> 102 #include <linux/bitops.h> 103 #include <linux/uaccess.h> 104 #include <asm/processor.h> /* Processor type for cache alignment. */ 105 #include <asm/unaligned.h> 106 #include <asm/io.h> 107 108 /* These identify the driver base version and may not be removed. */ 109 static const char version[] = 110 KERN_INFO DRV_NAME ".c:v1.05 1/09/2001 Written by Donald Becker <becker@scyld.com>\n" 111 " (unofficial 2.4.x port, " DRV_VERSION ", " DRV_RELDATE ")\n"; 112 113 MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); 114 MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC Gigabit Ethernet driver"); 115 MODULE_LICENSE("GPL"); 116 117 module_param(max_interrupt_work, int, 0); 118 module_param(mtu, int, 0); 119 module_param(debug, int, 0); 120 module_param(rx_copybreak, int, 0); 121 module_param_array(options, int, NULL, 0); 122 module_param_array(full_duplex, int, NULL, 0); 123 module_param(gx_fix, int, 0); 124 MODULE_PARM_DESC(max_interrupt_work, "G-NIC maximum events handled per interrupt"); 125 MODULE_PARM_DESC(mtu, "G-NIC MTU (all boards)"); 126 MODULE_PARM_DESC(debug, "G-NIC debug level (0-7)"); 127 MODULE_PARM_DESC(rx_copybreak, "G-NIC copy breakpoint for copy-only-tiny-frames"); 128 MODULE_PARM_DESC(options, "G-NIC: Bits 0-3: media type, bit 17: full duplex"); 129 MODULE_PARM_DESC(full_duplex, "G-NIC full duplex setting(s) (1)"); 130 MODULE_PARM_DESC(gx_fix, "G-NIC: enable GX server chipset bug workaround (0-1)"); 131 132 /* 133 Theory of Operation 134 135 I. Board Compatibility 136 137 This device driver is designed for the Packet Engines "Yellowfin" Gigabit 138 Ethernet adapter. The G-NIC 64-bit PCI card is supported, as well as the 139 Symbios 53C885E dual function chip. 140 141 II. Board-specific settings 142 143 PCI bus devices are configured by the system at boot time, so no jumpers 144 need to be set on the board. The system BIOS preferably should assign the 145 PCI INTA signal to an otherwise unused system IRQ line. 146 Note: Kernel versions earlier than 1.3.73 do not support shared PCI 147 interrupt lines. 148 149 III. Driver operation 150 151 IIIa. Ring buffers 152 153 The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple. 154 This is a descriptor list scheme similar to that used by the EEPro100 and 155 Tulip. This driver uses two statically allocated fixed-size descriptor lists 156 formed into rings by a branch from the final descriptor to the beginning of 157 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. 158 159 The driver allocates full frame size skbuffs for the Rx ring buffers at 160 open() time and passes the skb->data field to the Yellowfin as receive data 161 buffers. When an incoming frame is less than RX_COPYBREAK bytes long, 162 a fresh skbuff is allocated and the frame is copied to the new skbuff. 163 When the incoming frame is larger, the skbuff is passed directly up the 164 protocol stack and replaced by a newly allocated skbuff. 165 166 The RX_COPYBREAK value is chosen to trade-off the memory wasted by 167 using a full-sized skbuff for small frames vs. the copying costs of larger 168 frames. For small frames the copying cost is negligible (esp. considering 169 that we are pre-loading the cache with immediately useful header 170 information). For large frames the copying cost is non-trivial, and the 171 larger copy might flush the cache of useful data. 172 173 IIIC. Synchronization 174 175 The driver runs as two independent, single-threaded flows of control. One 176 is the send-packet routine, which enforces single-threaded use by the 177 dev->tbusy flag. The other thread is the interrupt handler, which is single 178 threaded by the hardware and other software. 179 180 The send packet thread has partial control over the Tx ring and 'dev->tbusy' 181 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next 182 queue slot is empty, it clears the tbusy flag when finished otherwise it sets 183 the 'yp->tx_full' flag. 184 185 The interrupt handler has exclusive control over the Rx ring and records stats 186 from the Tx ring. After reaping the stats, it marks the Tx queue entry as 187 empty by incrementing the dirty_tx mark. Iff the 'yp->tx_full' flag is set, it 188 clears both the tx_full and tbusy flags. 189 190 IV. Notes 191 192 Thanks to Kim Stearns of Packet Engines for providing a pair of G-NIC boards. 193 Thanks to Bruce Faust of Digitalscape for providing both their SYM53C885 board 194 and an AlphaStation to verifty the Alpha port! 195 196 IVb. References 197 198 Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential 199 Symbios SYM53C885 PCI-SCSI/Fast Ethernet Multifunction Controller Preliminary 200 Data Manual v3.0 201 http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html 202 http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html 203 204 IVc. Errata 205 206 See Packet Engines confidential appendix (prototype chips only). 207 */ 208 209 210 211 enum capability_flags { 212 HasMII=1, FullTxStatus=2, IsGigabit=4, HasMulticastBug=8, FullRxStatus=16, 213 HasMACAddrBug=32, /* Only on early revs. */ 214 DontUseEeprom=64, /* Don't read the MAC from the EEPROm. */ 215 }; 216 217 /* The PCI I/O space extent. */ 218 enum { 219 YELLOWFIN_SIZE = 0x100, 220 }; 221 222 struct pci_id_info { 223 const char *name; 224 struct match_info { 225 int pci, pci_mask, subsystem, subsystem_mask; 226 int revision, revision_mask; /* Only 8 bits. */ 227 } id; 228 int drv_flags; /* Driver use, intended as capability flags. */ 229 }; 230 231 static const struct pci_id_info pci_id_tbl[] = { 232 {"Yellowfin G-NIC Gigabit Ethernet", { 0x07021000, 0xffffffff}, 233 FullTxStatus | IsGigabit | HasMulticastBug | HasMACAddrBug | DontUseEeprom}, 234 {"Symbios SYM83C885", { 0x07011000, 0xffffffff}, 235 HasMII | DontUseEeprom }, 236 { } 237 }; 238 239 static const struct pci_device_id yellowfin_pci_tbl[] = { 240 { 0x1000, 0x0702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 241 { 0x1000, 0x0701, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, 242 { } 243 }; 244 MODULE_DEVICE_TABLE (pci, yellowfin_pci_tbl); 245 246 247 /* Offsets to the Yellowfin registers. Various sizes and alignments. */ 248 enum yellowfin_offsets { 249 TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C, 250 TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18, 251 RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C, 252 RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58, 253 EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86, 254 ChipRev=0x8C, DMACtrl=0x90, TxThreshold=0x94, 255 Cnfg=0xA0, FrameGap0=0xA2, FrameGap1=0xA4, 256 MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC, 257 MII_Status=0xAE, 258 RxDepth=0xB8, FlowCtrl=0xBC, 259 AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8, 260 EEStatus=0xF0, EECtrl=0xF1, EEAddr=0xF2, EERead=0xF3, EEWrite=0xF4, 261 EEFeature=0xF5, 262 }; 263 264 /* The Yellowfin Rx and Tx buffer descriptors. 265 Elements are written as 32 bit for endian portability. */ 266 struct yellowfin_desc { 267 __le32 dbdma_cmd; 268 __le32 addr; 269 __le32 branch_addr; 270 __le32 result_status; 271 }; 272 273 struct tx_status_words { 274 #ifdef __BIG_ENDIAN 275 u16 tx_errs; 276 u16 tx_cnt; 277 u16 paused; 278 u16 total_tx_cnt; 279 #else /* Little endian chips. */ 280 u16 tx_cnt; 281 u16 tx_errs; 282 u16 total_tx_cnt; 283 u16 paused; 284 #endif /* __BIG_ENDIAN */ 285 }; 286 287 /* Bits in yellowfin_desc.cmd */ 288 enum desc_cmd_bits { 289 CMD_TX_PKT=0x10000000, CMD_RX_BUF=0x20000000, CMD_TXSTATUS=0x30000000, 290 CMD_NOP=0x60000000, CMD_STOP=0x70000000, 291 BRANCH_ALWAYS=0x0C0000, INTR_ALWAYS=0x300000, WAIT_ALWAYS=0x030000, 292 BRANCH_IFTRUE=0x040000, 293 }; 294 295 /* Bits in yellowfin_desc.status */ 296 enum desc_status_bits { RX_EOP=0x0040, }; 297 298 /* Bits in the interrupt status/mask registers. */ 299 enum intr_status_bits { 300 IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08, 301 IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80, 302 IntrEarlyRx=0x100, IntrWakeup=0x200, }; 303 304 #define PRIV_ALIGN 31 /* Required alignment mask */ 305 #define MII_CNT 4 306 struct yellowfin_private { 307 /* Descriptor rings first for alignment. 308 Tx requires a second descriptor for status. */ 309 struct yellowfin_desc *rx_ring; 310 struct yellowfin_desc *tx_ring; 311 struct sk_buff* rx_skbuff[RX_RING_SIZE]; 312 struct sk_buff* tx_skbuff[TX_RING_SIZE]; 313 dma_addr_t rx_ring_dma; 314 dma_addr_t tx_ring_dma; 315 316 struct tx_status_words *tx_status; 317 dma_addr_t tx_status_dma; 318 319 struct timer_list timer; /* Media selection timer. */ 320 /* Frequently used and paired value: keep adjacent for cache effect. */ 321 int chip_id, drv_flags; 322 struct pci_dev *pci_dev; 323 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ 324 unsigned int rx_buf_sz; /* Based on MTU+slack. */ 325 struct tx_status_words *tx_tail_desc; 326 unsigned int cur_tx, dirty_tx; 327 int tx_threshold; 328 unsigned int tx_full:1; /* The Tx queue is full. */ 329 unsigned int full_duplex:1; /* Full-duplex operation requested. */ 330 unsigned int duplex_lock:1; 331 unsigned int medialock:1; /* Do not sense media. */ 332 unsigned int default_port:4; /* Last dev->if_port value. */ 333 /* MII transceiver section. */ 334 int mii_cnt; /* MII device addresses. */ 335 u16 advertising; /* NWay media advertisement */ 336 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used */ 337 spinlock_t lock; 338 void __iomem *base; 339 }; 340 341 static int read_eeprom(void __iomem *ioaddr, int location); 342 static int mdio_read(void __iomem *ioaddr, int phy_id, int location); 343 static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value); 344 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 345 static int yellowfin_open(struct net_device *dev); 346 static void yellowfin_timer(struct timer_list *t); 347 static void yellowfin_tx_timeout(struct net_device *dev); 348 static int yellowfin_init_ring(struct net_device *dev); 349 static netdev_tx_t yellowfin_start_xmit(struct sk_buff *skb, 350 struct net_device *dev); 351 static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance); 352 static int yellowfin_rx(struct net_device *dev); 353 static void yellowfin_error(struct net_device *dev, int intr_status); 354 static int yellowfin_close(struct net_device *dev); 355 static void set_rx_mode(struct net_device *dev); 356 static const struct ethtool_ops ethtool_ops; 357 358 static const struct net_device_ops netdev_ops = { 359 .ndo_open = yellowfin_open, 360 .ndo_stop = yellowfin_close, 361 .ndo_start_xmit = yellowfin_start_xmit, 362 .ndo_set_rx_mode = set_rx_mode, 363 .ndo_validate_addr = eth_validate_addr, 364 .ndo_set_mac_address = eth_mac_addr, 365 .ndo_do_ioctl = netdev_ioctl, 366 .ndo_tx_timeout = yellowfin_tx_timeout, 367 }; 368 369 static int yellowfin_init_one(struct pci_dev *pdev, 370 const struct pci_device_id *ent) 371 { 372 struct net_device *dev; 373 struct yellowfin_private *np; 374 int irq; 375 int chip_idx = ent->driver_data; 376 static int find_cnt; 377 void __iomem *ioaddr; 378 int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; 379 int drv_flags = pci_id_tbl[chip_idx].drv_flags; 380 void *ring_space; 381 dma_addr_t ring_dma; 382 #ifdef USE_IO_OPS 383 int bar = 0; 384 #else 385 int bar = 1; 386 #endif 387 388 /* when built into the kernel, we only print version if device is found */ 389 #ifndef MODULE 390 static int printed_version; 391 if (!printed_version++) 392 printk(version); 393 #endif 394 395 i = pci_enable_device(pdev); 396 if (i) return i; 397 398 dev = alloc_etherdev(sizeof(*np)); 399 if (!dev) 400 return -ENOMEM; 401 402 SET_NETDEV_DEV(dev, &pdev->dev); 403 404 np = netdev_priv(dev); 405 406 if (pci_request_regions(pdev, DRV_NAME)) 407 goto err_out_free_netdev; 408 409 pci_set_master (pdev); 410 411 ioaddr = pci_iomap(pdev, bar, YELLOWFIN_SIZE); 412 if (!ioaddr) 413 goto err_out_free_res; 414 415 irq = pdev->irq; 416 417 if (drv_flags & DontUseEeprom) 418 for (i = 0; i < 6; i++) 419 dev->dev_addr[i] = ioread8(ioaddr + StnAddr + i); 420 else { 421 int ee_offset = (read_eeprom(ioaddr, 6) == 0xff ? 0x100 : 0); 422 for (i = 0; i < 6; i++) 423 dev->dev_addr[i] = read_eeprom(ioaddr, ee_offset + i); 424 } 425 426 /* Reset the chip. */ 427 iowrite32(0x80000000, ioaddr + DMACtrl); 428 429 pci_set_drvdata(pdev, dev); 430 spin_lock_init(&np->lock); 431 432 np->pci_dev = pdev; 433 np->chip_id = chip_idx; 434 np->drv_flags = drv_flags; 435 np->base = ioaddr; 436 437 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma); 438 if (!ring_space) 439 goto err_out_cleardev; 440 np->tx_ring = ring_space; 441 np->tx_ring_dma = ring_dma; 442 443 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma); 444 if (!ring_space) 445 goto err_out_unmap_tx; 446 np->rx_ring = ring_space; 447 np->rx_ring_dma = ring_dma; 448 449 ring_space = pci_alloc_consistent(pdev, STATUS_TOTAL_SIZE, &ring_dma); 450 if (!ring_space) 451 goto err_out_unmap_rx; 452 np->tx_status = ring_space; 453 np->tx_status_dma = ring_dma; 454 455 if (dev->mem_start) 456 option = dev->mem_start; 457 458 /* The lower four bits are the media type. */ 459 if (option > 0) { 460 if (option & 0x200) 461 np->full_duplex = 1; 462 np->default_port = option & 15; 463 if (np->default_port) 464 np->medialock = 1; 465 } 466 if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0) 467 np->full_duplex = 1; 468 469 if (np->full_duplex) 470 np->duplex_lock = 1; 471 472 /* The Yellowfin-specific entries in the device structure. */ 473 dev->netdev_ops = &netdev_ops; 474 dev->ethtool_ops = ðtool_ops; 475 dev->watchdog_timeo = TX_TIMEOUT; 476 477 if (mtu) 478 dev->mtu = mtu; 479 480 i = register_netdev(dev); 481 if (i) 482 goto err_out_unmap_status; 483 484 netdev_info(dev, "%s type %8x at %p, %pM, IRQ %d\n", 485 pci_id_tbl[chip_idx].name, 486 ioread32(ioaddr + ChipRev), ioaddr, 487 dev->dev_addr, irq); 488 489 if (np->drv_flags & HasMII) { 490 int phy, phy_idx = 0; 491 for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) { 492 int mii_status = mdio_read(ioaddr, phy, 1); 493 if (mii_status != 0xffff && mii_status != 0x0000) { 494 np->phys[phy_idx++] = phy; 495 np->advertising = mdio_read(ioaddr, phy, 4); 496 netdev_info(dev, "MII PHY found at address %d, status 0x%04x advertising %04x\n", 497 phy, mii_status, np->advertising); 498 } 499 } 500 np->mii_cnt = phy_idx; 501 } 502 503 find_cnt++; 504 505 return 0; 506 507 err_out_unmap_status: 508 pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status, 509 np->tx_status_dma); 510 err_out_unmap_rx: 511 pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma); 512 err_out_unmap_tx: 513 pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma); 514 err_out_cleardev: 515 pci_iounmap(pdev, ioaddr); 516 err_out_free_res: 517 pci_release_regions(pdev); 518 err_out_free_netdev: 519 free_netdev (dev); 520 return -ENODEV; 521 } 522 523 static int read_eeprom(void __iomem *ioaddr, int location) 524 { 525 int bogus_cnt = 10000; /* Typical 33Mhz: 1050 ticks */ 526 527 iowrite8(location, ioaddr + EEAddr); 528 iowrite8(0x30 | ((location >> 8) & 7), ioaddr + EECtrl); 529 while ((ioread8(ioaddr + EEStatus) & 0x80) && --bogus_cnt > 0) 530 ; 531 return ioread8(ioaddr + EERead); 532 } 533 534 /* MII Managemen Data I/O accesses. 535 These routines assume the MDIO controller is idle, and do not exit until 536 the command is finished. */ 537 538 static int mdio_read(void __iomem *ioaddr, int phy_id, int location) 539 { 540 int i; 541 542 iowrite16((phy_id<<8) + location, ioaddr + MII_Addr); 543 iowrite16(1, ioaddr + MII_Cmd); 544 for (i = 10000; i >= 0; i--) 545 if ((ioread16(ioaddr + MII_Status) & 1) == 0) 546 break; 547 return ioread16(ioaddr + MII_Rd_Data); 548 } 549 550 static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value) 551 { 552 int i; 553 554 iowrite16((phy_id<<8) + location, ioaddr + MII_Addr); 555 iowrite16(value, ioaddr + MII_Wr_Data); 556 557 /* Wait for the command to finish. */ 558 for (i = 10000; i >= 0; i--) 559 if ((ioread16(ioaddr + MII_Status) & 1) == 0) 560 break; 561 } 562 563 564 static int yellowfin_open(struct net_device *dev) 565 { 566 struct yellowfin_private *yp = netdev_priv(dev); 567 const int irq = yp->pci_dev->irq; 568 void __iomem *ioaddr = yp->base; 569 int i, rc; 570 571 /* Reset the chip. */ 572 iowrite32(0x80000000, ioaddr + DMACtrl); 573 574 rc = request_irq(irq, yellowfin_interrupt, IRQF_SHARED, dev->name, dev); 575 if (rc) 576 return rc; 577 578 rc = yellowfin_init_ring(dev); 579 if (rc < 0) 580 goto err_free_irq; 581 582 iowrite32(yp->rx_ring_dma, ioaddr + RxPtr); 583 iowrite32(yp->tx_ring_dma, ioaddr + TxPtr); 584 585 for (i = 0; i < 6; i++) 586 iowrite8(dev->dev_addr[i], ioaddr + StnAddr + i); 587 588 /* Set up various condition 'select' registers. 589 There are no options here. */ 590 iowrite32(0x00800080, ioaddr + TxIntrSel); /* Interrupt on Tx abort */ 591 iowrite32(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */ 592 iowrite32(0x00400040, ioaddr + TxWaitSel); /* Wait on Tx status */ 593 iowrite32(0x00400040, ioaddr + RxIntrSel); /* Interrupt on Rx done */ 594 iowrite32(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */ 595 iowrite32(0x00400040, ioaddr + RxWaitSel); /* Wait on Rx done */ 596 597 /* Initialize other registers: with so many this eventually this will 598 converted to an offset/value list. */ 599 iowrite32(dma_ctrl, ioaddr + DMACtrl); 600 iowrite16(fifo_cfg, ioaddr + FIFOcfg); 601 /* Enable automatic generation of flow control frames, period 0xffff. */ 602 iowrite32(0x0030FFFF, ioaddr + FlowCtrl); 603 604 yp->tx_threshold = 32; 605 iowrite32(yp->tx_threshold, ioaddr + TxThreshold); 606 607 if (dev->if_port == 0) 608 dev->if_port = yp->default_port; 609 610 netif_start_queue(dev); 611 612 /* Setting the Rx mode will start the Rx process. */ 613 if (yp->drv_flags & IsGigabit) { 614 /* We are always in full-duplex mode with gigabit! */ 615 yp->full_duplex = 1; 616 iowrite16(0x01CF, ioaddr + Cnfg); 617 } else { 618 iowrite16(0x0018, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */ 619 iowrite16(0x1018, ioaddr + FrameGap1); 620 iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); 621 } 622 set_rx_mode(dev); 623 624 /* Enable interrupts by setting the interrupt mask. */ 625 iowrite16(0x81ff, ioaddr + IntrEnb); /* See enum intr_status_bits */ 626 iowrite16(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */ 627 iowrite32(0x80008000, ioaddr + RxCtrl); /* Start Rx and Tx channels. */ 628 iowrite32(0x80008000, ioaddr + TxCtrl); 629 630 if (yellowfin_debug > 2) { 631 netdev_printk(KERN_DEBUG, dev, "Done %s()\n", __func__); 632 } 633 634 /* Set the timer to check for link beat. */ 635 timer_setup(&yp->timer, yellowfin_timer, 0); 636 yp->timer.expires = jiffies + 3*HZ; 637 add_timer(&yp->timer); 638 out: 639 return rc; 640 641 err_free_irq: 642 free_irq(irq, dev); 643 goto out; 644 } 645 646 static void yellowfin_timer(struct timer_list *t) 647 { 648 struct yellowfin_private *yp = from_timer(yp, t, timer); 649 struct net_device *dev = pci_get_drvdata(yp->pci_dev); 650 void __iomem *ioaddr = yp->base; 651 int next_tick = 60*HZ; 652 653 if (yellowfin_debug > 3) { 654 netdev_printk(KERN_DEBUG, dev, "Yellowfin timer tick, status %08x\n", 655 ioread16(ioaddr + IntrStatus)); 656 } 657 658 if (yp->mii_cnt) { 659 int bmsr = mdio_read(ioaddr, yp->phys[0], MII_BMSR); 660 int lpa = mdio_read(ioaddr, yp->phys[0], MII_LPA); 661 int negotiated = lpa & yp->advertising; 662 if (yellowfin_debug > 1) 663 netdev_printk(KERN_DEBUG, dev, "MII #%d status register is %04x, link partner capability %04x\n", 664 yp->phys[0], bmsr, lpa); 665 666 yp->full_duplex = mii_duplex(yp->duplex_lock, negotiated); 667 668 iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); 669 670 if (bmsr & BMSR_LSTATUS) 671 next_tick = 60*HZ; 672 else 673 next_tick = 3*HZ; 674 } 675 676 yp->timer.expires = jiffies + next_tick; 677 add_timer(&yp->timer); 678 } 679 680 static void yellowfin_tx_timeout(struct net_device *dev) 681 { 682 struct yellowfin_private *yp = netdev_priv(dev); 683 void __iomem *ioaddr = yp->base; 684 685 netdev_warn(dev, "Yellowfin transmit timed out at %d/%d Tx status %04x, Rx status %04x, resetting...\n", 686 yp->cur_tx, yp->dirty_tx, 687 ioread32(ioaddr + TxStatus), 688 ioread32(ioaddr + RxStatus)); 689 690 /* Note: these should be KERN_DEBUG. */ 691 if (yellowfin_debug) { 692 int i; 693 pr_warn(" Rx ring %p: ", yp->rx_ring); 694 for (i = 0; i < RX_RING_SIZE; i++) 695 pr_cont(" %08x", yp->rx_ring[i].result_status); 696 pr_cont("\n"); 697 pr_warn(" Tx ring %p: ", yp->tx_ring); 698 for (i = 0; i < TX_RING_SIZE; i++) 699 pr_cont(" %04x /%08x", 700 yp->tx_status[i].tx_errs, 701 yp->tx_ring[i].result_status); 702 pr_cont("\n"); 703 } 704 705 /* If the hardware is found to hang regularly, we will update the code 706 to reinitialize the chip here. */ 707 dev->if_port = 0; 708 709 /* Wake the potentially-idle transmit channel. */ 710 iowrite32(0x10001000, yp->base + TxCtrl); 711 if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE) 712 netif_wake_queue (dev); /* Typical path */ 713 714 netif_trans_update(dev); /* prevent tx timeout */ 715 dev->stats.tx_errors++; 716 } 717 718 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ 719 static int yellowfin_init_ring(struct net_device *dev) 720 { 721 struct yellowfin_private *yp = netdev_priv(dev); 722 int i, j; 723 724 yp->tx_full = 0; 725 yp->cur_rx = yp->cur_tx = 0; 726 yp->dirty_tx = 0; 727 728 yp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); 729 730 for (i = 0; i < RX_RING_SIZE; i++) { 731 yp->rx_ring[i].dbdma_cmd = 732 cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); 733 yp->rx_ring[i].branch_addr = cpu_to_le32(yp->rx_ring_dma + 734 ((i+1)%RX_RING_SIZE)*sizeof(struct yellowfin_desc)); 735 } 736 737 for (i = 0; i < RX_RING_SIZE; i++) { 738 struct sk_buff *skb = netdev_alloc_skb(dev, yp->rx_buf_sz + 2); 739 yp->rx_skbuff[i] = skb; 740 if (skb == NULL) 741 break; 742 skb_reserve(skb, 2); /* 16 byte align the IP header. */ 743 yp->rx_ring[i].addr = cpu_to_le32(pci_map_single(yp->pci_dev, 744 skb->data, yp->rx_buf_sz, PCI_DMA_FROMDEVICE)); 745 } 746 if (i != RX_RING_SIZE) { 747 for (j = 0; j < i; j++) 748 dev_kfree_skb(yp->rx_skbuff[j]); 749 return -ENOMEM; 750 } 751 yp->rx_ring[i-1].dbdma_cmd = cpu_to_le32(CMD_STOP); 752 yp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); 753 754 #define NO_TXSTATS 755 #ifdef NO_TXSTATS 756 /* In this mode the Tx ring needs only a single descriptor. */ 757 for (i = 0; i < TX_RING_SIZE; i++) { 758 yp->tx_skbuff[i] = NULL; 759 yp->tx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); 760 yp->tx_ring[i].branch_addr = cpu_to_le32(yp->tx_ring_dma + 761 ((i+1)%TX_RING_SIZE)*sizeof(struct yellowfin_desc)); 762 } 763 /* Wrap ring */ 764 yp->tx_ring[--i].dbdma_cmd = cpu_to_le32(CMD_STOP | BRANCH_ALWAYS); 765 #else 766 { 767 /* Tx ring needs a pair of descriptors, the second for the status. */ 768 for (i = 0; i < TX_RING_SIZE; i++) { 769 j = 2*i; 770 yp->tx_skbuff[i] = 0; 771 /* Branch on Tx error. */ 772 yp->tx_ring[j].dbdma_cmd = cpu_to_le32(CMD_STOP); 773 yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma + 774 (j+1)*sizeof(struct yellowfin_desc)); 775 j++; 776 if (yp->flags & FullTxStatus) { 777 yp->tx_ring[j].dbdma_cmd = 778 cpu_to_le32(CMD_TXSTATUS | sizeof(*yp->tx_status)); 779 yp->tx_ring[j].request_cnt = sizeof(*yp->tx_status); 780 yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma + 781 i*sizeof(struct tx_status_words)); 782 } else { 783 /* Symbios chips write only tx_errs word. */ 784 yp->tx_ring[j].dbdma_cmd = 785 cpu_to_le32(CMD_TXSTATUS | INTR_ALWAYS | 2); 786 yp->tx_ring[j].request_cnt = 2; 787 /* Om pade ummmmm... */ 788 yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma + 789 i*sizeof(struct tx_status_words) + 790 &(yp->tx_status[0].tx_errs) - 791 &(yp->tx_status[0])); 792 } 793 yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma + 794 ((j+1)%(2*TX_RING_SIZE))*sizeof(struct yellowfin_desc)); 795 } 796 /* Wrap ring */ 797 yp->tx_ring[++j].dbdma_cmd |= cpu_to_le32(BRANCH_ALWAYS | INTR_ALWAYS); 798 } 799 #endif 800 yp->tx_tail_desc = &yp->tx_status[0]; 801 return 0; 802 } 803 804 static netdev_tx_t yellowfin_start_xmit(struct sk_buff *skb, 805 struct net_device *dev) 806 { 807 struct yellowfin_private *yp = netdev_priv(dev); 808 unsigned entry; 809 int len = skb->len; 810 811 netif_stop_queue (dev); 812 813 /* Note: Ordering is important here, set the field with the 814 "ownership" bit last, and only then increment cur_tx. */ 815 816 /* Calculate the next Tx descriptor entry. */ 817 entry = yp->cur_tx % TX_RING_SIZE; 818 819 if (gx_fix) { /* Note: only works for paddable protocols e.g. IP. */ 820 int cacheline_end = ((unsigned long)skb->data + skb->len) % 32; 821 /* Fix GX chipset errata. */ 822 if (cacheline_end > 24 || cacheline_end == 0) { 823 len = skb->len + 32 - cacheline_end + 1; 824 if (skb_padto(skb, len)) { 825 yp->tx_skbuff[entry] = NULL; 826 netif_wake_queue(dev); 827 return NETDEV_TX_OK; 828 } 829 } 830 } 831 yp->tx_skbuff[entry] = skb; 832 833 #ifdef NO_TXSTATS 834 yp->tx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev, 835 skb->data, len, PCI_DMA_TODEVICE)); 836 yp->tx_ring[entry].result_status = 0; 837 if (entry >= TX_RING_SIZE-1) { 838 /* New stop command. */ 839 yp->tx_ring[0].dbdma_cmd = cpu_to_le32(CMD_STOP); 840 yp->tx_ring[TX_RING_SIZE-1].dbdma_cmd = 841 cpu_to_le32(CMD_TX_PKT|BRANCH_ALWAYS | len); 842 } else { 843 yp->tx_ring[entry+1].dbdma_cmd = cpu_to_le32(CMD_STOP); 844 yp->tx_ring[entry].dbdma_cmd = 845 cpu_to_le32(CMD_TX_PKT | BRANCH_IFTRUE | len); 846 } 847 yp->cur_tx++; 848 #else 849 yp->tx_ring[entry<<1].request_cnt = len; 850 yp->tx_ring[entry<<1].addr = cpu_to_le32(pci_map_single(yp->pci_dev, 851 skb->data, len, PCI_DMA_TODEVICE)); 852 /* The input_last (status-write) command is constant, but we must 853 rewrite the subsequent 'stop' command. */ 854 855 yp->cur_tx++; 856 { 857 unsigned next_entry = yp->cur_tx % TX_RING_SIZE; 858 yp->tx_ring[next_entry<<1].dbdma_cmd = cpu_to_le32(CMD_STOP); 859 } 860 /* Final step -- overwrite the old 'stop' command. */ 861 862 yp->tx_ring[entry<<1].dbdma_cmd = 863 cpu_to_le32( ((entry % 6) == 0 ? CMD_TX_PKT|INTR_ALWAYS|BRANCH_IFTRUE : 864 CMD_TX_PKT | BRANCH_IFTRUE) | len); 865 #endif 866 867 /* Non-x86 Todo: explicitly flush cache lines here. */ 868 869 /* Wake the potentially-idle transmit channel. */ 870 iowrite32(0x10001000, yp->base + TxCtrl); 871 872 if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE) 873 netif_start_queue (dev); /* Typical path */ 874 else 875 yp->tx_full = 1; 876 877 if (yellowfin_debug > 4) { 878 netdev_printk(KERN_DEBUG, dev, "Yellowfin transmit frame #%d queued in slot %d\n", 879 yp->cur_tx, entry); 880 } 881 return NETDEV_TX_OK; 882 } 883 884 /* The interrupt handler does all of the Rx thread work and cleans up 885 after the Tx thread. */ 886 static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance) 887 { 888 struct net_device *dev = dev_instance; 889 struct yellowfin_private *yp; 890 void __iomem *ioaddr; 891 int boguscnt = max_interrupt_work; 892 unsigned int handled = 0; 893 894 yp = netdev_priv(dev); 895 ioaddr = yp->base; 896 897 spin_lock (&yp->lock); 898 899 do { 900 u16 intr_status = ioread16(ioaddr + IntrClear); 901 902 if (yellowfin_debug > 4) 903 netdev_printk(KERN_DEBUG, dev, "Yellowfin interrupt, status %04x\n", 904 intr_status); 905 906 if (intr_status == 0) 907 break; 908 handled = 1; 909 910 if (intr_status & (IntrRxDone | IntrEarlyRx)) { 911 yellowfin_rx(dev); 912 iowrite32(0x10001000, ioaddr + RxCtrl); /* Wake Rx engine. */ 913 } 914 915 #ifdef NO_TXSTATS 916 for (; yp->cur_tx - yp->dirty_tx > 0; yp->dirty_tx++) { 917 int entry = yp->dirty_tx % TX_RING_SIZE; 918 struct sk_buff *skb; 919 920 if (yp->tx_ring[entry].result_status == 0) 921 break; 922 skb = yp->tx_skbuff[entry]; 923 dev->stats.tx_packets++; 924 dev->stats.tx_bytes += skb->len; 925 /* Free the original skb. */ 926 pci_unmap_single(yp->pci_dev, le32_to_cpu(yp->tx_ring[entry].addr), 927 skb->len, PCI_DMA_TODEVICE); 928 dev_consume_skb_irq(skb); 929 yp->tx_skbuff[entry] = NULL; 930 } 931 if (yp->tx_full && 932 yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE - 4) { 933 /* The ring is no longer full, clear tbusy. */ 934 yp->tx_full = 0; 935 netif_wake_queue(dev); 936 } 937 #else 938 if ((intr_status & IntrTxDone) || (yp->tx_tail_desc->tx_errs)) { 939 unsigned dirty_tx = yp->dirty_tx; 940 941 for (dirty_tx = yp->dirty_tx; yp->cur_tx - dirty_tx > 0; 942 dirty_tx++) { 943 /* Todo: optimize this. */ 944 int entry = dirty_tx % TX_RING_SIZE; 945 u16 tx_errs = yp->tx_status[entry].tx_errs; 946 struct sk_buff *skb; 947 948 #ifndef final_version 949 if (yellowfin_debug > 5) 950 netdev_printk(KERN_DEBUG, dev, "Tx queue %d check, Tx status %04x %04x %04x %04x\n", 951 entry, 952 yp->tx_status[entry].tx_cnt, 953 yp->tx_status[entry].tx_errs, 954 yp->tx_status[entry].total_tx_cnt, 955 yp->tx_status[entry].paused); 956 #endif 957 if (tx_errs == 0) 958 break; /* It still hasn't been Txed */ 959 skb = yp->tx_skbuff[entry]; 960 if (tx_errs & 0xF810) { 961 /* There was an major error, log it. */ 962 #ifndef final_version 963 if (yellowfin_debug > 1) 964 netdev_printk(KERN_DEBUG, dev, "Transmit error, Tx status %04x\n", 965 tx_errs); 966 #endif 967 dev->stats.tx_errors++; 968 if (tx_errs & 0xF800) dev->stats.tx_aborted_errors++; 969 if (tx_errs & 0x0800) dev->stats.tx_carrier_errors++; 970 if (tx_errs & 0x2000) dev->stats.tx_window_errors++; 971 if (tx_errs & 0x8000) dev->stats.tx_fifo_errors++; 972 } else { 973 #ifndef final_version 974 if (yellowfin_debug > 4) 975 netdev_printk(KERN_DEBUG, dev, "Normal transmit, Tx status %04x\n", 976 tx_errs); 977 #endif 978 dev->stats.tx_bytes += skb->len; 979 dev->stats.collisions += tx_errs & 15; 980 dev->stats.tx_packets++; 981 } 982 /* Free the original skb. */ 983 pci_unmap_single(yp->pci_dev, 984 yp->tx_ring[entry<<1].addr, skb->len, 985 PCI_DMA_TODEVICE); 986 dev_consume_skb_irq(skb); 987 yp->tx_skbuff[entry] = 0; 988 /* Mark status as empty. */ 989 yp->tx_status[entry].tx_errs = 0; 990 } 991 992 #ifndef final_version 993 if (yp->cur_tx - dirty_tx > TX_RING_SIZE) { 994 netdev_err(dev, "Out-of-sync dirty pointer, %d vs. %d, full=%d\n", 995 dirty_tx, yp->cur_tx, yp->tx_full); 996 dirty_tx += TX_RING_SIZE; 997 } 998 #endif 999 1000 if (yp->tx_full && 1001 yp->cur_tx - dirty_tx < TX_QUEUE_SIZE - 2) { 1002 /* The ring is no longer full, clear tbusy. */ 1003 yp->tx_full = 0; 1004 netif_wake_queue(dev); 1005 } 1006 1007 yp->dirty_tx = dirty_tx; 1008 yp->tx_tail_desc = &yp->tx_status[dirty_tx % TX_RING_SIZE]; 1009 } 1010 #endif 1011 1012 /* Log errors and other uncommon events. */ 1013 if (intr_status & 0x2ee) /* Abnormal error summary. */ 1014 yellowfin_error(dev, intr_status); 1015 1016 if (--boguscnt < 0) { 1017 netdev_warn(dev, "Too much work at interrupt, status=%#04x\n", 1018 intr_status); 1019 break; 1020 } 1021 } while (1); 1022 1023 if (yellowfin_debug > 3) 1024 netdev_printk(KERN_DEBUG, dev, "exiting interrupt, status=%#04x\n", 1025 ioread16(ioaddr + IntrStatus)); 1026 1027 spin_unlock (&yp->lock); 1028 return IRQ_RETVAL(handled); 1029 } 1030 1031 /* This routine is logically part of the interrupt handler, but separated 1032 for clarity and better register allocation. */ 1033 static int yellowfin_rx(struct net_device *dev) 1034 { 1035 struct yellowfin_private *yp = netdev_priv(dev); 1036 int entry = yp->cur_rx % RX_RING_SIZE; 1037 int boguscnt = yp->dirty_rx + RX_RING_SIZE - yp->cur_rx; 1038 1039 if (yellowfin_debug > 4) { 1040 printk(KERN_DEBUG " In yellowfin_rx(), entry %d status %08x\n", 1041 entry, yp->rx_ring[entry].result_status); 1042 printk(KERN_DEBUG " #%d desc. %08x %08x %08x\n", 1043 entry, yp->rx_ring[entry].dbdma_cmd, yp->rx_ring[entry].addr, 1044 yp->rx_ring[entry].result_status); 1045 } 1046 1047 /* If EOP is set on the next entry, it's a new packet. Send it up. */ 1048 while (1) { 1049 struct yellowfin_desc *desc = &yp->rx_ring[entry]; 1050 struct sk_buff *rx_skb = yp->rx_skbuff[entry]; 1051 s16 frame_status; 1052 u16 desc_status; 1053 int data_size, yf_size; 1054 u8 *buf_addr; 1055 1056 if(!desc->result_status) 1057 break; 1058 pci_dma_sync_single_for_cpu(yp->pci_dev, le32_to_cpu(desc->addr), 1059 yp->rx_buf_sz, PCI_DMA_FROMDEVICE); 1060 desc_status = le32_to_cpu(desc->result_status) >> 16; 1061 buf_addr = rx_skb->data; 1062 data_size = (le32_to_cpu(desc->dbdma_cmd) - 1063 le32_to_cpu(desc->result_status)) & 0xffff; 1064 frame_status = get_unaligned_le16(&(buf_addr[data_size - 2])); 1065 if (yellowfin_debug > 4) 1066 printk(KERN_DEBUG " %s() status was %04x\n", 1067 __func__, frame_status); 1068 if (--boguscnt < 0) 1069 break; 1070 1071 yf_size = sizeof(struct yellowfin_desc); 1072 1073 if ( ! (desc_status & RX_EOP)) { 1074 if (data_size != 0) 1075 netdev_warn(dev, "Oversized Ethernet frame spanned multiple buffers, status %04x, data_size %d!\n", 1076 desc_status, data_size); 1077 dev->stats.rx_length_errors++; 1078 } else if ((yp->drv_flags & IsGigabit) && (frame_status & 0x0038)) { 1079 /* There was a error. */ 1080 if (yellowfin_debug > 3) 1081 printk(KERN_DEBUG " %s() Rx error was %04x\n", 1082 __func__, frame_status); 1083 dev->stats.rx_errors++; 1084 if (frame_status & 0x0060) dev->stats.rx_length_errors++; 1085 if (frame_status & 0x0008) dev->stats.rx_frame_errors++; 1086 if (frame_status & 0x0010) dev->stats.rx_crc_errors++; 1087 if (frame_status < 0) dev->stats.rx_dropped++; 1088 } else if ( !(yp->drv_flags & IsGigabit) && 1089 ((buf_addr[data_size-1] & 0x85) || buf_addr[data_size-2] & 0xC0)) { 1090 u8 status1 = buf_addr[data_size-2]; 1091 u8 status2 = buf_addr[data_size-1]; 1092 dev->stats.rx_errors++; 1093 if (status1 & 0xC0) dev->stats.rx_length_errors++; 1094 if (status2 & 0x03) dev->stats.rx_frame_errors++; 1095 if (status2 & 0x04) dev->stats.rx_crc_errors++; 1096 if (status2 & 0x80) dev->stats.rx_dropped++; 1097 #ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ 1098 } else if ((yp->flags & HasMACAddrBug) && 1099 !ether_addr_equal(le32_to_cpu(yp->rx_ring_dma + 1100 entry * yf_size), 1101 dev->dev_addr) && 1102 !ether_addr_equal(le32_to_cpu(yp->rx_ring_dma + 1103 entry * yf_size), 1104 "\377\377\377\377\377\377")) { 1105 if (bogus_rx++ == 0) 1106 netdev_warn(dev, "Bad frame to %pM\n", 1107 buf_addr); 1108 #endif 1109 } else { 1110 struct sk_buff *skb; 1111 int pkt_len = data_size - 1112 (yp->chip_id ? 7 : 8 + buf_addr[data_size - 8]); 1113 /* To verify: Yellowfin Length should omit the CRC! */ 1114 1115 #ifndef final_version 1116 if (yellowfin_debug > 4) 1117 printk(KERN_DEBUG " %s() normal Rx pkt length %d of %d, bogus_cnt %d\n", 1118 __func__, pkt_len, data_size, boguscnt); 1119 #endif 1120 /* Check if the packet is long enough to just pass up the skbuff 1121 without copying to a properly sized skbuff. */ 1122 if (pkt_len > rx_copybreak) { 1123 skb_put(skb = rx_skb, pkt_len); 1124 pci_unmap_single(yp->pci_dev, 1125 le32_to_cpu(yp->rx_ring[entry].addr), 1126 yp->rx_buf_sz, 1127 PCI_DMA_FROMDEVICE); 1128 yp->rx_skbuff[entry] = NULL; 1129 } else { 1130 skb = netdev_alloc_skb(dev, pkt_len + 2); 1131 if (skb == NULL) 1132 break; 1133 skb_reserve(skb, 2); /* 16 byte align the IP header */ 1134 skb_copy_to_linear_data(skb, rx_skb->data, pkt_len); 1135 skb_put(skb, pkt_len); 1136 pci_dma_sync_single_for_device(yp->pci_dev, 1137 le32_to_cpu(desc->addr), 1138 yp->rx_buf_sz, 1139 PCI_DMA_FROMDEVICE); 1140 } 1141 skb->protocol = eth_type_trans(skb, dev); 1142 netif_rx(skb); 1143 dev->stats.rx_packets++; 1144 dev->stats.rx_bytes += pkt_len; 1145 } 1146 entry = (++yp->cur_rx) % RX_RING_SIZE; 1147 } 1148 1149 /* Refill the Rx ring buffers. */ 1150 for (; yp->cur_rx - yp->dirty_rx > 0; yp->dirty_rx++) { 1151 entry = yp->dirty_rx % RX_RING_SIZE; 1152 if (yp->rx_skbuff[entry] == NULL) { 1153 struct sk_buff *skb = netdev_alloc_skb(dev, yp->rx_buf_sz + 2); 1154 if (skb == NULL) 1155 break; /* Better luck next round. */ 1156 yp->rx_skbuff[entry] = skb; 1157 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 1158 yp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev, 1159 skb->data, yp->rx_buf_sz, PCI_DMA_FROMDEVICE)); 1160 } 1161 yp->rx_ring[entry].dbdma_cmd = cpu_to_le32(CMD_STOP); 1162 yp->rx_ring[entry].result_status = 0; /* Clear complete bit. */ 1163 if (entry != 0) 1164 yp->rx_ring[entry - 1].dbdma_cmd = 1165 cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); 1166 else 1167 yp->rx_ring[RX_RING_SIZE - 1].dbdma_cmd = 1168 cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS 1169 | yp->rx_buf_sz); 1170 } 1171 1172 return 0; 1173 } 1174 1175 static void yellowfin_error(struct net_device *dev, int intr_status) 1176 { 1177 netdev_err(dev, "Something Wicked happened! %04x\n", intr_status); 1178 /* Hmmmmm, it's not clear what to do here. */ 1179 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault)) 1180 dev->stats.tx_errors++; 1181 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault)) 1182 dev->stats.rx_errors++; 1183 } 1184 1185 static int yellowfin_close(struct net_device *dev) 1186 { 1187 struct yellowfin_private *yp = netdev_priv(dev); 1188 void __iomem *ioaddr = yp->base; 1189 int i; 1190 1191 netif_stop_queue (dev); 1192 1193 if (yellowfin_debug > 1) { 1194 netdev_printk(KERN_DEBUG, dev, "Shutting down ethercard, status was Tx %04x Rx %04x Int %02x\n", 1195 ioread16(ioaddr + TxStatus), 1196 ioread16(ioaddr + RxStatus), 1197 ioread16(ioaddr + IntrStatus)); 1198 netdev_printk(KERN_DEBUG, dev, "Queue pointers were Tx %d / %d, Rx %d / %d\n", 1199 yp->cur_tx, yp->dirty_tx, 1200 yp->cur_rx, yp->dirty_rx); 1201 } 1202 1203 /* Disable interrupts by clearing the interrupt mask. */ 1204 iowrite16(0x0000, ioaddr + IntrEnb); 1205 1206 /* Stop the chip's Tx and Rx processes. */ 1207 iowrite32(0x80000000, ioaddr + RxCtrl); 1208 iowrite32(0x80000000, ioaddr + TxCtrl); 1209 1210 del_timer(&yp->timer); 1211 1212 #if defined(__i386__) 1213 if (yellowfin_debug > 2) { 1214 printk(KERN_DEBUG " Tx ring at %08llx:\n", 1215 (unsigned long long)yp->tx_ring_dma); 1216 for (i = 0; i < TX_RING_SIZE*2; i++) 1217 printk(KERN_DEBUG " %c #%d desc. %08x %08x %08x %08x\n", 1218 ioread32(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ', 1219 i, yp->tx_ring[i].dbdma_cmd, yp->tx_ring[i].addr, 1220 yp->tx_ring[i].branch_addr, yp->tx_ring[i].result_status); 1221 printk(KERN_DEBUG " Tx status %p:\n", yp->tx_status); 1222 for (i = 0; i < TX_RING_SIZE; i++) 1223 printk(KERN_DEBUG " #%d status %04x %04x %04x %04x\n", 1224 i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs, 1225 yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused); 1226 1227 printk(KERN_DEBUG " Rx ring %08llx:\n", 1228 (unsigned long long)yp->rx_ring_dma); 1229 for (i = 0; i < RX_RING_SIZE; i++) { 1230 printk(KERN_DEBUG " %c #%d desc. %08x %08x %08x\n", 1231 ioread32(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ', 1232 i, yp->rx_ring[i].dbdma_cmd, yp->rx_ring[i].addr, 1233 yp->rx_ring[i].result_status); 1234 if (yellowfin_debug > 6) { 1235 if (get_unaligned((u8*)yp->rx_ring[i].addr) != 0x69) { 1236 int j; 1237 1238 printk(KERN_DEBUG); 1239 for (j = 0; j < 0x50; j++) 1240 pr_cont(" %04x", 1241 get_unaligned(((u16*)yp->rx_ring[i].addr) + j)); 1242 pr_cont("\n"); 1243 } 1244 } 1245 } 1246 } 1247 #endif /* __i386__ debugging only */ 1248 1249 free_irq(yp->pci_dev->irq, dev); 1250 1251 /* Free all the skbuffs in the Rx queue. */ 1252 for (i = 0; i < RX_RING_SIZE; i++) { 1253 yp->rx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); 1254 yp->rx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */ 1255 if (yp->rx_skbuff[i]) { 1256 dev_kfree_skb(yp->rx_skbuff[i]); 1257 } 1258 yp->rx_skbuff[i] = NULL; 1259 } 1260 for (i = 0; i < TX_RING_SIZE; i++) { 1261 dev_kfree_skb(yp->tx_skbuff[i]); 1262 yp->tx_skbuff[i] = NULL; 1263 } 1264 1265 #ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ 1266 if (yellowfin_debug > 0) { 1267 netdev_printk(KERN_DEBUG, dev, "Received %d frames that we should not have\n", 1268 bogus_rx); 1269 } 1270 #endif 1271 1272 return 0; 1273 } 1274 1275 /* Set or clear the multicast filter for this adaptor. */ 1276 1277 static void set_rx_mode(struct net_device *dev) 1278 { 1279 struct yellowfin_private *yp = netdev_priv(dev); 1280 void __iomem *ioaddr = yp->base; 1281 u16 cfg_value = ioread16(ioaddr + Cnfg); 1282 1283 /* Stop the Rx process to change any value. */ 1284 iowrite16(cfg_value & ~0x1000, ioaddr + Cnfg); 1285 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ 1286 iowrite16(0x000F, ioaddr + AddrMode); 1287 } else if ((netdev_mc_count(dev) > 64) || 1288 (dev->flags & IFF_ALLMULTI)) { 1289 /* Too many to filter well, or accept all multicasts. */ 1290 iowrite16(0x000B, ioaddr + AddrMode); 1291 } else if (!netdev_mc_empty(dev)) { /* Must use the multicast hash table. */ 1292 struct netdev_hw_addr *ha; 1293 u16 hash_table[4]; 1294 int i; 1295 1296 memset(hash_table, 0, sizeof(hash_table)); 1297 netdev_for_each_mc_addr(ha, dev) { 1298 unsigned int bit; 1299 1300 /* Due to a bug in the early chip versions, multiple filter 1301 slots must be set for each address. */ 1302 if (yp->drv_flags & HasMulticastBug) { 1303 bit = (ether_crc_le(3, ha->addr) >> 3) & 0x3f; 1304 hash_table[bit >> 4] |= (1 << bit); 1305 bit = (ether_crc_le(4, ha->addr) >> 3) & 0x3f; 1306 hash_table[bit >> 4] |= (1 << bit); 1307 bit = (ether_crc_le(5, ha->addr) >> 3) & 0x3f; 1308 hash_table[bit >> 4] |= (1 << bit); 1309 } 1310 bit = (ether_crc_le(6, ha->addr) >> 3) & 0x3f; 1311 hash_table[bit >> 4] |= (1 << bit); 1312 } 1313 /* Copy the hash table to the chip. */ 1314 for (i = 0; i < 4; i++) 1315 iowrite16(hash_table[i], ioaddr + HashTbl + i*2); 1316 iowrite16(0x0003, ioaddr + AddrMode); 1317 } else { /* Normal, unicast/broadcast-only mode. */ 1318 iowrite16(0x0001, ioaddr + AddrMode); 1319 } 1320 /* Restart the Rx process. */ 1321 iowrite16(cfg_value | 0x1000, ioaddr + Cnfg); 1322 } 1323 1324 static void yellowfin_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 1325 { 1326 struct yellowfin_private *np = netdev_priv(dev); 1327 1328 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 1329 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 1330 strlcpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info)); 1331 } 1332 1333 static const struct ethtool_ops ethtool_ops = { 1334 .get_drvinfo = yellowfin_get_drvinfo 1335 }; 1336 1337 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1338 { 1339 struct yellowfin_private *np = netdev_priv(dev); 1340 void __iomem *ioaddr = np->base; 1341 struct mii_ioctl_data *data = if_mii(rq); 1342 1343 switch(cmd) { 1344 case SIOCGMIIPHY: /* Get address of MII PHY in use. */ 1345 data->phy_id = np->phys[0] & 0x1f; 1346 /* Fall Through */ 1347 1348 case SIOCGMIIREG: /* Read MII PHY register. */ 1349 data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f); 1350 return 0; 1351 1352 case SIOCSMIIREG: /* Write MII PHY register. */ 1353 if (data->phy_id == np->phys[0]) { 1354 u16 value = data->val_in; 1355 switch (data->reg_num) { 1356 case 0: 1357 /* Check for autonegotiation on or reset. */ 1358 np->medialock = (value & 0x9000) ? 0 : 1; 1359 if (np->medialock) 1360 np->full_duplex = (value & 0x0100) ? 1 : 0; 1361 break; 1362 case 4: np->advertising = value; break; 1363 } 1364 /* Perhaps check_duplex(dev), depending on chip semantics. */ 1365 } 1366 mdio_write(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in); 1367 return 0; 1368 default: 1369 return -EOPNOTSUPP; 1370 } 1371 } 1372 1373 1374 static void yellowfin_remove_one(struct pci_dev *pdev) 1375 { 1376 struct net_device *dev = pci_get_drvdata(pdev); 1377 struct yellowfin_private *np; 1378 1379 BUG_ON(!dev); 1380 np = netdev_priv(dev); 1381 1382 pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status, 1383 np->tx_status_dma); 1384 pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma); 1385 pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma); 1386 unregister_netdev (dev); 1387 1388 pci_iounmap(pdev, np->base); 1389 1390 pci_release_regions (pdev); 1391 1392 free_netdev (dev); 1393 } 1394 1395 1396 static struct pci_driver yellowfin_driver = { 1397 .name = DRV_NAME, 1398 .id_table = yellowfin_pci_tbl, 1399 .probe = yellowfin_init_one, 1400 .remove = yellowfin_remove_one, 1401 }; 1402 1403 1404 static int __init yellowfin_init (void) 1405 { 1406 /* when a module, this is printed whether or not devices are found in probe */ 1407 #ifdef MODULE 1408 printk(version); 1409 #endif 1410 return pci_register_driver(&yellowfin_driver); 1411 } 1412 1413 1414 static void __exit yellowfin_cleanup (void) 1415 { 1416 pci_unregister_driver (&yellowfin_driver); 1417 } 1418 1419 1420 module_init(yellowfin_init); 1421 module_exit(yellowfin_cleanup); 1422