1 /* $Id: sungem.c,v 1.44.2.22 2002/03/13 01:18:12 davem Exp $ 2 * sungem.c: Sun GEM ethernet driver. 3 * 4 * Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com) 5 * 6 * Support for Apple GMAC and assorted PHYs, WOL, Power Management 7 * (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org) 8 * (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp. 9 * 10 * NAPI and NETPOLL support 11 * (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com) 12 * 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 #include <linux/types.h> 20 #include <linux/fcntl.h> 21 #include <linux/interrupt.h> 22 #include <linux/ioport.h> 23 #include <linux/in.h> 24 #include <linux/sched.h> 25 #include <linux/string.h> 26 #include <linux/delay.h> 27 #include <linux/errno.h> 28 #include <linux/pci.h> 29 #include <linux/dma-mapping.h> 30 #include <linux/netdevice.h> 31 #include <linux/etherdevice.h> 32 #include <linux/skbuff.h> 33 #include <linux/mii.h> 34 #include <linux/ethtool.h> 35 #include <linux/crc32.h> 36 #include <linux/random.h> 37 #include <linux/workqueue.h> 38 #include <linux/if_vlan.h> 39 #include <linux/bitops.h> 40 #include <linux/mm.h> 41 #include <linux/gfp.h> 42 43 #include <asm/io.h> 44 #include <asm/byteorder.h> 45 #include <linux/uaccess.h> 46 #include <asm/irq.h> 47 48 #ifdef CONFIG_SPARC 49 #include <asm/idprom.h> 50 #include <asm/prom.h> 51 #endif 52 53 #ifdef CONFIG_PPC_PMAC 54 #include <asm/prom.h> 55 #include <asm/machdep.h> 56 #include <asm/pmac_feature.h> 57 #endif 58 59 #include <linux/sungem_phy.h> 60 #include "sungem.h" 61 62 /* Stripping FCS is causing problems, disabled for now */ 63 #undef STRIP_FCS 64 65 #define DEFAULT_MSG (NETIF_MSG_DRV | \ 66 NETIF_MSG_PROBE | \ 67 NETIF_MSG_LINK) 68 69 #define ADVERTISE_MASK (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \ 70 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \ 71 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | \ 72 SUPPORTED_Pause | SUPPORTED_Autoneg) 73 74 #define DRV_NAME "sungem" 75 #define DRV_VERSION "1.0" 76 #define DRV_AUTHOR "David S. Miller <davem@redhat.com>" 77 78 static char version[] = 79 DRV_NAME ".c:v" DRV_VERSION " " DRV_AUTHOR "\n"; 80 81 MODULE_AUTHOR(DRV_AUTHOR); 82 MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver"); 83 MODULE_LICENSE("GPL"); 84 85 #define GEM_MODULE_NAME "gem" 86 87 static const struct pci_device_id gem_pci_tbl[] = { 88 { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_GEM, 89 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 90 91 /* These models only differ from the original GEM in 92 * that their tx/rx fifos are of a different size and 93 * they only support 10/100 speeds. -DaveM 94 * 95 * Apple's GMAC does support gigabit on machines with 96 * the BCM54xx PHYs. -BenH 97 */ 98 { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_RIO_GEM, 99 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 100 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC, 101 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 102 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMACP, 103 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 104 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC2, 105 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 106 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC, 107 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 108 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM, 109 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 110 { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID2_GMAC, 111 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, 112 {0, } 113 }; 114 115 MODULE_DEVICE_TABLE(pci, gem_pci_tbl); 116 117 static u16 __sungem_phy_read(struct gem *gp, int phy_addr, int reg) 118 { 119 u32 cmd; 120 int limit = 10000; 121 122 cmd = (1 << 30); 123 cmd |= (2 << 28); 124 cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; 125 cmd |= (reg << 18) & MIF_FRAME_REGAD; 126 cmd |= (MIF_FRAME_TAMSB); 127 writel(cmd, gp->regs + MIF_FRAME); 128 129 while (--limit) { 130 cmd = readl(gp->regs + MIF_FRAME); 131 if (cmd & MIF_FRAME_TALSB) 132 break; 133 134 udelay(10); 135 } 136 137 if (!limit) 138 cmd = 0xffff; 139 140 return cmd & MIF_FRAME_DATA; 141 } 142 143 static inline int _sungem_phy_read(struct net_device *dev, int mii_id, int reg) 144 { 145 struct gem *gp = netdev_priv(dev); 146 return __sungem_phy_read(gp, mii_id, reg); 147 } 148 149 static inline u16 sungem_phy_read(struct gem *gp, int reg) 150 { 151 return __sungem_phy_read(gp, gp->mii_phy_addr, reg); 152 } 153 154 static void __sungem_phy_write(struct gem *gp, int phy_addr, int reg, u16 val) 155 { 156 u32 cmd; 157 int limit = 10000; 158 159 cmd = (1 << 30); 160 cmd |= (1 << 28); 161 cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; 162 cmd |= (reg << 18) & MIF_FRAME_REGAD; 163 cmd |= (MIF_FRAME_TAMSB); 164 cmd |= (val & MIF_FRAME_DATA); 165 writel(cmd, gp->regs + MIF_FRAME); 166 167 while (limit--) { 168 cmd = readl(gp->regs + MIF_FRAME); 169 if (cmd & MIF_FRAME_TALSB) 170 break; 171 172 udelay(10); 173 } 174 } 175 176 static inline void _sungem_phy_write(struct net_device *dev, int mii_id, int reg, int val) 177 { 178 struct gem *gp = netdev_priv(dev); 179 __sungem_phy_write(gp, mii_id, reg, val & 0xffff); 180 } 181 182 static inline void sungem_phy_write(struct gem *gp, int reg, u16 val) 183 { 184 __sungem_phy_write(gp, gp->mii_phy_addr, reg, val); 185 } 186 187 static inline void gem_enable_ints(struct gem *gp) 188 { 189 /* Enable all interrupts but TXDONE */ 190 writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK); 191 } 192 193 static inline void gem_disable_ints(struct gem *gp) 194 { 195 /* Disable all interrupts, including TXDONE */ 196 writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK); 197 (void)readl(gp->regs + GREG_IMASK); /* write posting */ 198 } 199 200 static void gem_get_cell(struct gem *gp) 201 { 202 BUG_ON(gp->cell_enabled < 0); 203 gp->cell_enabled++; 204 #ifdef CONFIG_PPC_PMAC 205 if (gp->cell_enabled == 1) { 206 mb(); 207 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1); 208 udelay(10); 209 } 210 #endif /* CONFIG_PPC_PMAC */ 211 } 212 213 /* Turn off the chip's clock */ 214 static void gem_put_cell(struct gem *gp) 215 { 216 BUG_ON(gp->cell_enabled <= 0); 217 gp->cell_enabled--; 218 #ifdef CONFIG_PPC_PMAC 219 if (gp->cell_enabled == 0) { 220 mb(); 221 pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0); 222 udelay(10); 223 } 224 #endif /* CONFIG_PPC_PMAC */ 225 } 226 227 static inline void gem_netif_stop(struct gem *gp) 228 { 229 netif_trans_update(gp->dev); /* prevent tx timeout */ 230 napi_disable(&gp->napi); 231 netif_tx_disable(gp->dev); 232 } 233 234 static inline void gem_netif_start(struct gem *gp) 235 { 236 /* NOTE: unconditional netif_wake_queue is only 237 * appropriate so long as all callers are assured to 238 * have free tx slots. 239 */ 240 netif_wake_queue(gp->dev); 241 napi_enable(&gp->napi); 242 } 243 244 static void gem_schedule_reset(struct gem *gp) 245 { 246 gp->reset_task_pending = 1; 247 schedule_work(&gp->reset_task); 248 } 249 250 static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits) 251 { 252 if (netif_msg_intr(gp)) 253 printk(KERN_DEBUG "%s: mif interrupt\n", gp->dev->name); 254 } 255 256 static int gem_pcs_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 257 { 258 u32 pcs_istat = readl(gp->regs + PCS_ISTAT); 259 u32 pcs_miistat; 260 261 if (netif_msg_intr(gp)) 262 printk(KERN_DEBUG "%s: pcs interrupt, pcs_istat: 0x%x\n", 263 gp->dev->name, pcs_istat); 264 265 if (!(pcs_istat & PCS_ISTAT_LSC)) { 266 netdev_err(dev, "PCS irq but no link status change???\n"); 267 return 0; 268 } 269 270 /* The link status bit latches on zero, so you must 271 * read it twice in such a case to see a transition 272 * to the link being up. 273 */ 274 pcs_miistat = readl(gp->regs + PCS_MIISTAT); 275 if (!(pcs_miistat & PCS_MIISTAT_LS)) 276 pcs_miistat |= 277 (readl(gp->regs + PCS_MIISTAT) & 278 PCS_MIISTAT_LS); 279 280 if (pcs_miistat & PCS_MIISTAT_ANC) { 281 /* The remote-fault indication is only valid 282 * when autoneg has completed. 283 */ 284 if (pcs_miistat & PCS_MIISTAT_RF) 285 netdev_info(dev, "PCS AutoNEG complete, RemoteFault\n"); 286 else 287 netdev_info(dev, "PCS AutoNEG complete\n"); 288 } 289 290 if (pcs_miistat & PCS_MIISTAT_LS) { 291 netdev_info(dev, "PCS link is now up\n"); 292 netif_carrier_on(gp->dev); 293 } else { 294 netdev_info(dev, "PCS link is now down\n"); 295 netif_carrier_off(gp->dev); 296 /* If this happens and the link timer is not running, 297 * reset so we re-negotiate. 298 */ 299 if (!timer_pending(&gp->link_timer)) 300 return 1; 301 } 302 303 return 0; 304 } 305 306 static int gem_txmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 307 { 308 u32 txmac_stat = readl(gp->regs + MAC_TXSTAT); 309 310 if (netif_msg_intr(gp)) 311 printk(KERN_DEBUG "%s: txmac interrupt, txmac_stat: 0x%x\n", 312 gp->dev->name, txmac_stat); 313 314 /* Defer timer expiration is quite normal, 315 * don't even log the event. 316 */ 317 if ((txmac_stat & MAC_TXSTAT_DTE) && 318 !(txmac_stat & ~MAC_TXSTAT_DTE)) 319 return 0; 320 321 if (txmac_stat & MAC_TXSTAT_URUN) { 322 netdev_err(dev, "TX MAC xmit underrun\n"); 323 dev->stats.tx_fifo_errors++; 324 } 325 326 if (txmac_stat & MAC_TXSTAT_MPE) { 327 netdev_err(dev, "TX MAC max packet size error\n"); 328 dev->stats.tx_errors++; 329 } 330 331 /* The rest are all cases of one of the 16-bit TX 332 * counters expiring. 333 */ 334 if (txmac_stat & MAC_TXSTAT_NCE) 335 dev->stats.collisions += 0x10000; 336 337 if (txmac_stat & MAC_TXSTAT_ECE) { 338 dev->stats.tx_aborted_errors += 0x10000; 339 dev->stats.collisions += 0x10000; 340 } 341 342 if (txmac_stat & MAC_TXSTAT_LCE) { 343 dev->stats.tx_aborted_errors += 0x10000; 344 dev->stats.collisions += 0x10000; 345 } 346 347 /* We do not keep track of MAC_TXSTAT_FCE and 348 * MAC_TXSTAT_PCE events. 349 */ 350 return 0; 351 } 352 353 /* When we get a RX fifo overflow, the RX unit in GEM is probably hung 354 * so we do the following. 355 * 356 * If any part of the reset goes wrong, we return 1 and that causes the 357 * whole chip to be reset. 358 */ 359 static int gem_rxmac_reset(struct gem *gp) 360 { 361 struct net_device *dev = gp->dev; 362 int limit, i; 363 u64 desc_dma; 364 u32 val; 365 366 /* First, reset & disable MAC RX. */ 367 writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); 368 for (limit = 0; limit < 5000; limit++) { 369 if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD)) 370 break; 371 udelay(10); 372 } 373 if (limit == 5000) { 374 netdev_err(dev, "RX MAC will not reset, resetting whole chip\n"); 375 return 1; 376 } 377 378 writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB, 379 gp->regs + MAC_RXCFG); 380 for (limit = 0; limit < 5000; limit++) { 381 if (!(readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB)) 382 break; 383 udelay(10); 384 } 385 if (limit == 5000) { 386 netdev_err(dev, "RX MAC will not disable, resetting whole chip\n"); 387 return 1; 388 } 389 390 /* Second, disable RX DMA. */ 391 writel(0, gp->regs + RXDMA_CFG); 392 for (limit = 0; limit < 5000; limit++) { 393 if (!(readl(gp->regs + RXDMA_CFG) & RXDMA_CFG_ENABLE)) 394 break; 395 udelay(10); 396 } 397 if (limit == 5000) { 398 netdev_err(dev, "RX DMA will not disable, resetting whole chip\n"); 399 return 1; 400 } 401 402 mdelay(5); 403 404 /* Execute RX reset command. */ 405 writel(gp->swrst_base | GREG_SWRST_RXRST, 406 gp->regs + GREG_SWRST); 407 for (limit = 0; limit < 5000; limit++) { 408 if (!(readl(gp->regs + GREG_SWRST) & GREG_SWRST_RXRST)) 409 break; 410 udelay(10); 411 } 412 if (limit == 5000) { 413 netdev_err(dev, "RX reset command will not execute, resetting whole chip\n"); 414 return 1; 415 } 416 417 /* Refresh the RX ring. */ 418 for (i = 0; i < RX_RING_SIZE; i++) { 419 struct gem_rxd *rxd = &gp->init_block->rxd[i]; 420 421 if (gp->rx_skbs[i] == NULL) { 422 netdev_err(dev, "Parts of RX ring empty, resetting whole chip\n"); 423 return 1; 424 } 425 426 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); 427 } 428 gp->rx_new = gp->rx_old = 0; 429 430 /* Now we must reprogram the rest of RX unit. */ 431 desc_dma = (u64) gp->gblock_dvma; 432 desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); 433 writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); 434 writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); 435 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); 436 val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | 437 ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); 438 writel(val, gp->regs + RXDMA_CFG); 439 if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) 440 writel(((5 & RXDMA_BLANK_IPKTS) | 441 ((8 << 12) & RXDMA_BLANK_ITIME)), 442 gp->regs + RXDMA_BLANK); 443 else 444 writel(((5 & RXDMA_BLANK_IPKTS) | 445 ((4 << 12) & RXDMA_BLANK_ITIME)), 446 gp->regs + RXDMA_BLANK); 447 val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); 448 val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); 449 writel(val, gp->regs + RXDMA_PTHRESH); 450 val = readl(gp->regs + RXDMA_CFG); 451 writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); 452 writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); 453 val = readl(gp->regs + MAC_RXCFG); 454 writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); 455 456 return 0; 457 } 458 459 static int gem_rxmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 460 { 461 u32 rxmac_stat = readl(gp->regs + MAC_RXSTAT); 462 int ret = 0; 463 464 if (netif_msg_intr(gp)) 465 printk(KERN_DEBUG "%s: rxmac interrupt, rxmac_stat: 0x%x\n", 466 gp->dev->name, rxmac_stat); 467 468 if (rxmac_stat & MAC_RXSTAT_OFLW) { 469 u32 smac = readl(gp->regs + MAC_SMACHINE); 470 471 netdev_err(dev, "RX MAC fifo overflow smac[%08x]\n", smac); 472 dev->stats.rx_over_errors++; 473 dev->stats.rx_fifo_errors++; 474 475 ret = gem_rxmac_reset(gp); 476 } 477 478 if (rxmac_stat & MAC_RXSTAT_ACE) 479 dev->stats.rx_frame_errors += 0x10000; 480 481 if (rxmac_stat & MAC_RXSTAT_CCE) 482 dev->stats.rx_crc_errors += 0x10000; 483 484 if (rxmac_stat & MAC_RXSTAT_LCE) 485 dev->stats.rx_length_errors += 0x10000; 486 487 /* We do not track MAC_RXSTAT_FCE and MAC_RXSTAT_VCE 488 * events. 489 */ 490 return ret; 491 } 492 493 static int gem_mac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 494 { 495 u32 mac_cstat = readl(gp->regs + MAC_CSTAT); 496 497 if (netif_msg_intr(gp)) 498 printk(KERN_DEBUG "%s: mac interrupt, mac_cstat: 0x%x\n", 499 gp->dev->name, mac_cstat); 500 501 /* This interrupt is just for pause frame and pause 502 * tracking. It is useful for diagnostics and debug 503 * but probably by default we will mask these events. 504 */ 505 if (mac_cstat & MAC_CSTAT_PS) 506 gp->pause_entered++; 507 508 if (mac_cstat & MAC_CSTAT_PRCV) 509 gp->pause_last_time_recvd = (mac_cstat >> 16); 510 511 return 0; 512 } 513 514 static int gem_mif_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 515 { 516 u32 mif_status = readl(gp->regs + MIF_STATUS); 517 u32 reg_val, changed_bits; 518 519 reg_val = (mif_status & MIF_STATUS_DATA) >> 16; 520 changed_bits = (mif_status & MIF_STATUS_STAT); 521 522 gem_handle_mif_event(gp, reg_val, changed_bits); 523 524 return 0; 525 } 526 527 static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) 528 { 529 u32 pci_estat = readl(gp->regs + GREG_PCIESTAT); 530 531 if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && 532 gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { 533 netdev_err(dev, "PCI error [%04x]", pci_estat); 534 535 if (pci_estat & GREG_PCIESTAT_BADACK) 536 pr_cont(" <No ACK64# during ABS64 cycle>"); 537 if (pci_estat & GREG_PCIESTAT_DTRTO) 538 pr_cont(" <Delayed transaction timeout>"); 539 if (pci_estat & GREG_PCIESTAT_OTHER) 540 pr_cont(" <other>"); 541 pr_cont("\n"); 542 } else { 543 pci_estat |= GREG_PCIESTAT_OTHER; 544 netdev_err(dev, "PCI error\n"); 545 } 546 547 if (pci_estat & GREG_PCIESTAT_OTHER) { 548 u16 pci_cfg_stat; 549 550 /* Interrogate PCI config space for the 551 * true cause. 552 */ 553 pci_read_config_word(gp->pdev, PCI_STATUS, 554 &pci_cfg_stat); 555 netdev_err(dev, "Read PCI cfg space status [%04x]\n", 556 pci_cfg_stat); 557 if (pci_cfg_stat & PCI_STATUS_PARITY) 558 netdev_err(dev, "PCI parity error detected\n"); 559 if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT) 560 netdev_err(dev, "PCI target abort\n"); 561 if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT) 562 netdev_err(dev, "PCI master acks target abort\n"); 563 if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT) 564 netdev_err(dev, "PCI master abort\n"); 565 if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR) 566 netdev_err(dev, "PCI system error SERR#\n"); 567 if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY) 568 netdev_err(dev, "PCI parity error\n"); 569 570 /* Write the error bits back to clear them. */ 571 pci_cfg_stat &= (PCI_STATUS_PARITY | 572 PCI_STATUS_SIG_TARGET_ABORT | 573 PCI_STATUS_REC_TARGET_ABORT | 574 PCI_STATUS_REC_MASTER_ABORT | 575 PCI_STATUS_SIG_SYSTEM_ERROR | 576 PCI_STATUS_DETECTED_PARITY); 577 pci_write_config_word(gp->pdev, 578 PCI_STATUS, pci_cfg_stat); 579 } 580 581 /* For all PCI errors, we should reset the chip. */ 582 return 1; 583 } 584 585 /* All non-normal interrupt conditions get serviced here. 586 * Returns non-zero if we should just exit the interrupt 587 * handler right now (ie. if we reset the card which invalidates 588 * all of the other original irq status bits). 589 */ 590 static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_status) 591 { 592 if (gem_status & GREG_STAT_RXNOBUF) { 593 /* Frame arrived, no free RX buffers available. */ 594 if (netif_msg_rx_err(gp)) 595 printk(KERN_DEBUG "%s: no buffer for rx frame\n", 596 gp->dev->name); 597 dev->stats.rx_dropped++; 598 } 599 600 if (gem_status & GREG_STAT_RXTAGERR) { 601 /* corrupt RX tag framing */ 602 if (netif_msg_rx_err(gp)) 603 printk(KERN_DEBUG "%s: corrupt rx tag framing\n", 604 gp->dev->name); 605 dev->stats.rx_errors++; 606 607 return 1; 608 } 609 610 if (gem_status & GREG_STAT_PCS) { 611 if (gem_pcs_interrupt(dev, gp, gem_status)) 612 return 1; 613 } 614 615 if (gem_status & GREG_STAT_TXMAC) { 616 if (gem_txmac_interrupt(dev, gp, gem_status)) 617 return 1; 618 } 619 620 if (gem_status & GREG_STAT_RXMAC) { 621 if (gem_rxmac_interrupt(dev, gp, gem_status)) 622 return 1; 623 } 624 625 if (gem_status & GREG_STAT_MAC) { 626 if (gem_mac_interrupt(dev, gp, gem_status)) 627 return 1; 628 } 629 630 if (gem_status & GREG_STAT_MIF) { 631 if (gem_mif_interrupt(dev, gp, gem_status)) 632 return 1; 633 } 634 635 if (gem_status & GREG_STAT_PCIERR) { 636 if (gem_pci_interrupt(dev, gp, gem_status)) 637 return 1; 638 } 639 640 return 0; 641 } 642 643 static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status) 644 { 645 int entry, limit; 646 647 entry = gp->tx_old; 648 limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT); 649 while (entry != limit) { 650 struct sk_buff *skb; 651 struct gem_txd *txd; 652 dma_addr_t dma_addr; 653 u32 dma_len; 654 int frag; 655 656 if (netif_msg_tx_done(gp)) 657 printk(KERN_DEBUG "%s: tx done, slot %d\n", 658 gp->dev->name, entry); 659 skb = gp->tx_skbs[entry]; 660 if (skb_shinfo(skb)->nr_frags) { 661 int last = entry + skb_shinfo(skb)->nr_frags; 662 int walk = entry; 663 int incomplete = 0; 664 665 last &= (TX_RING_SIZE - 1); 666 for (;;) { 667 walk = NEXT_TX(walk); 668 if (walk == limit) 669 incomplete = 1; 670 if (walk == last) 671 break; 672 } 673 if (incomplete) 674 break; 675 } 676 gp->tx_skbs[entry] = NULL; 677 dev->stats.tx_bytes += skb->len; 678 679 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { 680 txd = &gp->init_block->txd[entry]; 681 682 dma_addr = le64_to_cpu(txd->buffer); 683 dma_len = le64_to_cpu(txd->control_word) & TXDCTRL_BUFSZ; 684 685 pci_unmap_page(gp->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE); 686 entry = NEXT_TX(entry); 687 } 688 689 dev->stats.tx_packets++; 690 dev_consume_skb_any(skb); 691 } 692 gp->tx_old = entry; 693 694 /* Need to make the tx_old update visible to gem_start_xmit() 695 * before checking for netif_queue_stopped(). Without the 696 * memory barrier, there is a small possibility that gem_start_xmit() 697 * will miss it and cause the queue to be stopped forever. 698 */ 699 smp_mb(); 700 701 if (unlikely(netif_queue_stopped(dev) && 702 TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))) { 703 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); 704 705 __netif_tx_lock(txq, smp_processor_id()); 706 if (netif_queue_stopped(dev) && 707 TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) 708 netif_wake_queue(dev); 709 __netif_tx_unlock(txq); 710 } 711 } 712 713 static __inline__ void gem_post_rxds(struct gem *gp, int limit) 714 { 715 int cluster_start, curr, count, kick; 716 717 cluster_start = curr = (gp->rx_new & ~(4 - 1)); 718 count = 0; 719 kick = -1; 720 dma_wmb(); 721 while (curr != limit) { 722 curr = NEXT_RX(curr); 723 if (++count == 4) { 724 struct gem_rxd *rxd = 725 &gp->init_block->rxd[cluster_start]; 726 for (;;) { 727 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); 728 rxd++; 729 cluster_start = NEXT_RX(cluster_start); 730 if (cluster_start == curr) 731 break; 732 } 733 kick = curr; 734 count = 0; 735 } 736 } 737 if (kick >= 0) { 738 mb(); 739 writel(kick, gp->regs + RXDMA_KICK); 740 } 741 } 742 743 #define ALIGNED_RX_SKB_ADDR(addr) \ 744 ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr)) 745 static __inline__ struct sk_buff *gem_alloc_skb(struct net_device *dev, int size, 746 gfp_t gfp_flags) 747 { 748 struct sk_buff *skb = alloc_skb(size + 64, gfp_flags); 749 750 if (likely(skb)) { 751 unsigned long offset = ALIGNED_RX_SKB_ADDR(skb->data); 752 skb_reserve(skb, offset); 753 } 754 return skb; 755 } 756 757 static int gem_rx(struct gem *gp, int work_to_do) 758 { 759 struct net_device *dev = gp->dev; 760 int entry, drops, work_done = 0; 761 u32 done; 762 __sum16 csum; 763 764 if (netif_msg_rx_status(gp)) 765 printk(KERN_DEBUG "%s: rx interrupt, done: %d, rx_new: %d\n", 766 gp->dev->name, readl(gp->regs + RXDMA_DONE), gp->rx_new); 767 768 entry = gp->rx_new; 769 drops = 0; 770 done = readl(gp->regs + RXDMA_DONE); 771 for (;;) { 772 struct gem_rxd *rxd = &gp->init_block->rxd[entry]; 773 struct sk_buff *skb; 774 u64 status = le64_to_cpu(rxd->status_word); 775 dma_addr_t dma_addr; 776 int len; 777 778 if ((status & RXDCTRL_OWN) != 0) 779 break; 780 781 if (work_done >= RX_RING_SIZE || work_done >= work_to_do) 782 break; 783 784 /* When writing back RX descriptor, GEM writes status 785 * then buffer address, possibly in separate transactions. 786 * If we don't wait for the chip to write both, we could 787 * post a new buffer to this descriptor then have GEM spam 788 * on the buffer address. We sync on the RX completion 789 * register to prevent this from happening. 790 */ 791 if (entry == done) { 792 done = readl(gp->regs + RXDMA_DONE); 793 if (entry == done) 794 break; 795 } 796 797 /* We can now account for the work we're about to do */ 798 work_done++; 799 800 skb = gp->rx_skbs[entry]; 801 802 len = (status & RXDCTRL_BUFSZ) >> 16; 803 if ((len < ETH_ZLEN) || (status & RXDCTRL_BAD)) { 804 dev->stats.rx_errors++; 805 if (len < ETH_ZLEN) 806 dev->stats.rx_length_errors++; 807 if (len & RXDCTRL_BAD) 808 dev->stats.rx_crc_errors++; 809 810 /* We'll just return it to GEM. */ 811 drop_it: 812 dev->stats.rx_dropped++; 813 goto next; 814 } 815 816 dma_addr = le64_to_cpu(rxd->buffer); 817 if (len > RX_COPY_THRESHOLD) { 818 struct sk_buff *new_skb; 819 820 new_skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); 821 if (new_skb == NULL) { 822 drops++; 823 goto drop_it; 824 } 825 pci_unmap_page(gp->pdev, dma_addr, 826 RX_BUF_ALLOC_SIZE(gp), 827 PCI_DMA_FROMDEVICE); 828 gp->rx_skbs[entry] = new_skb; 829 skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET)); 830 rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev, 831 virt_to_page(new_skb->data), 832 offset_in_page(new_skb->data), 833 RX_BUF_ALLOC_SIZE(gp), 834 PCI_DMA_FROMDEVICE)); 835 skb_reserve(new_skb, RX_OFFSET); 836 837 /* Trim the original skb for the netif. */ 838 skb_trim(skb, len); 839 } else { 840 struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2); 841 842 if (copy_skb == NULL) { 843 drops++; 844 goto drop_it; 845 } 846 847 skb_reserve(copy_skb, 2); 848 skb_put(copy_skb, len); 849 pci_dma_sync_single_for_cpu(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); 850 skb_copy_from_linear_data(skb, copy_skb->data, len); 851 pci_dma_sync_single_for_device(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); 852 853 /* We'll reuse the original ring buffer. */ 854 skb = copy_skb; 855 } 856 857 csum = (__force __sum16)htons((status & RXDCTRL_TCPCSUM) ^ 0xffff); 858 skb->csum = csum_unfold(csum); 859 skb->ip_summed = CHECKSUM_COMPLETE; 860 skb->protocol = eth_type_trans(skb, gp->dev); 861 862 napi_gro_receive(&gp->napi, skb); 863 864 dev->stats.rx_packets++; 865 dev->stats.rx_bytes += len; 866 867 next: 868 entry = NEXT_RX(entry); 869 } 870 871 gem_post_rxds(gp, entry); 872 873 gp->rx_new = entry; 874 875 if (drops) 876 netdev_info(gp->dev, "Memory squeeze, deferring packet\n"); 877 878 return work_done; 879 } 880 881 static int gem_poll(struct napi_struct *napi, int budget) 882 { 883 struct gem *gp = container_of(napi, struct gem, napi); 884 struct net_device *dev = gp->dev; 885 int work_done; 886 887 work_done = 0; 888 do { 889 /* Handle anomalies */ 890 if (unlikely(gp->status & GREG_STAT_ABNORMAL)) { 891 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); 892 int reset; 893 894 /* We run the abnormal interrupt handling code with 895 * the Tx lock. It only resets the Rx portion of the 896 * chip, but we need to guard it against DMA being 897 * restarted by the link poll timer 898 */ 899 __netif_tx_lock(txq, smp_processor_id()); 900 reset = gem_abnormal_irq(dev, gp, gp->status); 901 __netif_tx_unlock(txq); 902 if (reset) { 903 gem_schedule_reset(gp); 904 napi_complete(napi); 905 return work_done; 906 } 907 } 908 909 /* Run TX completion thread */ 910 gem_tx(dev, gp, gp->status); 911 912 /* Run RX thread. We don't use any locking here, 913 * code willing to do bad things - like cleaning the 914 * rx ring - must call napi_disable(), which 915 * schedule_timeout()'s if polling is already disabled. 916 */ 917 work_done += gem_rx(gp, budget - work_done); 918 919 if (work_done >= budget) 920 return work_done; 921 922 gp->status = readl(gp->regs + GREG_STAT); 923 } while (gp->status & GREG_STAT_NAPI); 924 925 napi_complete_done(napi, work_done); 926 gem_enable_ints(gp); 927 928 return work_done; 929 } 930 931 static irqreturn_t gem_interrupt(int irq, void *dev_id) 932 { 933 struct net_device *dev = dev_id; 934 struct gem *gp = netdev_priv(dev); 935 936 if (napi_schedule_prep(&gp->napi)) { 937 u32 gem_status = readl(gp->regs + GREG_STAT); 938 939 if (unlikely(gem_status == 0)) { 940 napi_enable(&gp->napi); 941 return IRQ_NONE; 942 } 943 if (netif_msg_intr(gp)) 944 printk(KERN_DEBUG "%s: gem_interrupt() gem_status: 0x%x\n", 945 gp->dev->name, gem_status); 946 947 gp->status = gem_status; 948 gem_disable_ints(gp); 949 __napi_schedule(&gp->napi); 950 } 951 952 /* If polling was disabled at the time we received that 953 * interrupt, we may return IRQ_HANDLED here while we 954 * should return IRQ_NONE. No big deal... 955 */ 956 return IRQ_HANDLED; 957 } 958 959 #ifdef CONFIG_NET_POLL_CONTROLLER 960 static void gem_poll_controller(struct net_device *dev) 961 { 962 struct gem *gp = netdev_priv(dev); 963 964 disable_irq(gp->pdev->irq); 965 gem_interrupt(gp->pdev->irq, dev); 966 enable_irq(gp->pdev->irq); 967 } 968 #endif 969 970 static void gem_tx_timeout(struct net_device *dev) 971 { 972 struct gem *gp = netdev_priv(dev); 973 974 netdev_err(dev, "transmit timed out, resetting\n"); 975 976 netdev_err(dev, "TX_STATE[%08x:%08x:%08x]\n", 977 readl(gp->regs + TXDMA_CFG), 978 readl(gp->regs + MAC_TXSTAT), 979 readl(gp->regs + MAC_TXCFG)); 980 netdev_err(dev, "RX_STATE[%08x:%08x:%08x]\n", 981 readl(gp->regs + RXDMA_CFG), 982 readl(gp->regs + MAC_RXSTAT), 983 readl(gp->regs + MAC_RXCFG)); 984 985 gem_schedule_reset(gp); 986 } 987 988 static __inline__ int gem_intme(int entry) 989 { 990 /* Algorithm: IRQ every 1/2 of descriptors. */ 991 if (!(entry & ((TX_RING_SIZE>>1)-1))) 992 return 1; 993 994 return 0; 995 } 996 997 static netdev_tx_t gem_start_xmit(struct sk_buff *skb, 998 struct net_device *dev) 999 { 1000 struct gem *gp = netdev_priv(dev); 1001 int entry; 1002 u64 ctrl; 1003 1004 ctrl = 0; 1005 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1006 const u64 csum_start_off = skb_checksum_start_offset(skb); 1007 const u64 csum_stuff_off = csum_start_off + skb->csum_offset; 1008 1009 ctrl = (TXDCTRL_CENAB | 1010 (csum_start_off << 15) | 1011 (csum_stuff_off << 21)); 1012 } 1013 1014 if (unlikely(TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1))) { 1015 /* This is a hard error, log it. */ 1016 if (!netif_queue_stopped(dev)) { 1017 netif_stop_queue(dev); 1018 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); 1019 } 1020 return NETDEV_TX_BUSY; 1021 } 1022 1023 entry = gp->tx_new; 1024 gp->tx_skbs[entry] = skb; 1025 1026 if (skb_shinfo(skb)->nr_frags == 0) { 1027 struct gem_txd *txd = &gp->init_block->txd[entry]; 1028 dma_addr_t mapping; 1029 u32 len; 1030 1031 len = skb->len; 1032 mapping = pci_map_page(gp->pdev, 1033 virt_to_page(skb->data), 1034 offset_in_page(skb->data), 1035 len, PCI_DMA_TODEVICE); 1036 ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len; 1037 if (gem_intme(entry)) 1038 ctrl |= TXDCTRL_INTME; 1039 txd->buffer = cpu_to_le64(mapping); 1040 dma_wmb(); 1041 txd->control_word = cpu_to_le64(ctrl); 1042 entry = NEXT_TX(entry); 1043 } else { 1044 struct gem_txd *txd; 1045 u32 first_len; 1046 u64 intme; 1047 dma_addr_t first_mapping; 1048 int frag, first_entry = entry; 1049 1050 intme = 0; 1051 if (gem_intme(entry)) 1052 intme |= TXDCTRL_INTME; 1053 1054 /* We must give this initial chunk to the device last. 1055 * Otherwise we could race with the device. 1056 */ 1057 first_len = skb_headlen(skb); 1058 first_mapping = pci_map_page(gp->pdev, virt_to_page(skb->data), 1059 offset_in_page(skb->data), 1060 first_len, PCI_DMA_TODEVICE); 1061 entry = NEXT_TX(entry); 1062 1063 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { 1064 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; 1065 u32 len; 1066 dma_addr_t mapping; 1067 u64 this_ctrl; 1068 1069 len = skb_frag_size(this_frag); 1070 mapping = skb_frag_dma_map(&gp->pdev->dev, this_frag, 1071 0, len, DMA_TO_DEVICE); 1072 this_ctrl = ctrl; 1073 if (frag == skb_shinfo(skb)->nr_frags - 1) 1074 this_ctrl |= TXDCTRL_EOF; 1075 1076 txd = &gp->init_block->txd[entry]; 1077 txd->buffer = cpu_to_le64(mapping); 1078 dma_wmb(); 1079 txd->control_word = cpu_to_le64(this_ctrl | len); 1080 1081 if (gem_intme(entry)) 1082 intme |= TXDCTRL_INTME; 1083 1084 entry = NEXT_TX(entry); 1085 } 1086 txd = &gp->init_block->txd[first_entry]; 1087 txd->buffer = cpu_to_le64(first_mapping); 1088 dma_wmb(); 1089 txd->control_word = 1090 cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len); 1091 } 1092 1093 gp->tx_new = entry; 1094 if (unlikely(TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))) { 1095 netif_stop_queue(dev); 1096 1097 /* netif_stop_queue() must be done before checking 1098 * checking tx index in TX_BUFFS_AVAIL() below, because 1099 * in gem_tx(), we update tx_old before checking for 1100 * netif_queue_stopped(). 1101 */ 1102 smp_mb(); 1103 if (TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) 1104 netif_wake_queue(dev); 1105 } 1106 if (netif_msg_tx_queued(gp)) 1107 printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n", 1108 dev->name, entry, skb->len); 1109 mb(); 1110 writel(gp->tx_new, gp->regs + TXDMA_KICK); 1111 1112 return NETDEV_TX_OK; 1113 } 1114 1115 static void gem_pcs_reset(struct gem *gp) 1116 { 1117 int limit; 1118 u32 val; 1119 1120 /* Reset PCS unit. */ 1121 val = readl(gp->regs + PCS_MIICTRL); 1122 val |= PCS_MIICTRL_RST; 1123 writel(val, gp->regs + PCS_MIICTRL); 1124 1125 limit = 32; 1126 while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) { 1127 udelay(100); 1128 if (limit-- <= 0) 1129 break; 1130 } 1131 if (limit < 0) 1132 netdev_warn(gp->dev, "PCS reset bit would not clear\n"); 1133 } 1134 1135 static void gem_pcs_reinit_adv(struct gem *gp) 1136 { 1137 u32 val; 1138 1139 /* Make sure PCS is disabled while changing advertisement 1140 * configuration. 1141 */ 1142 val = readl(gp->regs + PCS_CFG); 1143 val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO); 1144 writel(val, gp->regs + PCS_CFG); 1145 1146 /* Advertise all capabilities except asymmetric 1147 * pause. 1148 */ 1149 val = readl(gp->regs + PCS_MIIADV); 1150 val |= (PCS_MIIADV_FD | PCS_MIIADV_HD | 1151 PCS_MIIADV_SP | PCS_MIIADV_AP); 1152 writel(val, gp->regs + PCS_MIIADV); 1153 1154 /* Enable and restart auto-negotiation, disable wrapback/loopback, 1155 * and re-enable PCS. 1156 */ 1157 val = readl(gp->regs + PCS_MIICTRL); 1158 val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE); 1159 val &= ~PCS_MIICTRL_WB; 1160 writel(val, gp->regs + PCS_MIICTRL); 1161 1162 val = readl(gp->regs + PCS_CFG); 1163 val |= PCS_CFG_ENABLE; 1164 writel(val, gp->regs + PCS_CFG); 1165 1166 /* Make sure serialink loopback is off. The meaning 1167 * of this bit is logically inverted based upon whether 1168 * you are in Serialink or SERDES mode. 1169 */ 1170 val = readl(gp->regs + PCS_SCTRL); 1171 if (gp->phy_type == phy_serialink) 1172 val &= ~PCS_SCTRL_LOOP; 1173 else 1174 val |= PCS_SCTRL_LOOP; 1175 writel(val, gp->regs + PCS_SCTRL); 1176 } 1177 1178 #define STOP_TRIES 32 1179 1180 static void gem_reset(struct gem *gp) 1181 { 1182 int limit; 1183 u32 val; 1184 1185 /* Make sure we won't get any more interrupts */ 1186 writel(0xffffffff, gp->regs + GREG_IMASK); 1187 1188 /* Reset the chip */ 1189 writel(gp->swrst_base | GREG_SWRST_TXRST | GREG_SWRST_RXRST, 1190 gp->regs + GREG_SWRST); 1191 1192 limit = STOP_TRIES; 1193 1194 do { 1195 udelay(20); 1196 val = readl(gp->regs + GREG_SWRST); 1197 if (limit-- <= 0) 1198 break; 1199 } while (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)); 1200 1201 if (limit < 0) 1202 netdev_err(gp->dev, "SW reset is ghetto\n"); 1203 1204 if (gp->phy_type == phy_serialink || gp->phy_type == phy_serdes) 1205 gem_pcs_reinit_adv(gp); 1206 } 1207 1208 static void gem_start_dma(struct gem *gp) 1209 { 1210 u32 val; 1211 1212 /* We are ready to rock, turn everything on. */ 1213 val = readl(gp->regs + TXDMA_CFG); 1214 writel(val | TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); 1215 val = readl(gp->regs + RXDMA_CFG); 1216 writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); 1217 val = readl(gp->regs + MAC_TXCFG); 1218 writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); 1219 val = readl(gp->regs + MAC_RXCFG); 1220 writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); 1221 1222 (void) readl(gp->regs + MAC_RXCFG); 1223 udelay(100); 1224 1225 gem_enable_ints(gp); 1226 1227 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); 1228 } 1229 1230 /* DMA won't be actually stopped before about 4ms tho ... 1231 */ 1232 static void gem_stop_dma(struct gem *gp) 1233 { 1234 u32 val; 1235 1236 /* We are done rocking, turn everything off. */ 1237 val = readl(gp->regs + TXDMA_CFG); 1238 writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); 1239 val = readl(gp->regs + RXDMA_CFG); 1240 writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); 1241 val = readl(gp->regs + MAC_TXCFG); 1242 writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); 1243 val = readl(gp->regs + MAC_RXCFG); 1244 writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); 1245 1246 (void) readl(gp->regs + MAC_RXCFG); 1247 1248 /* Need to wait a bit ... done by the caller */ 1249 } 1250 1251 1252 // XXX dbl check what that function should do when called on PCS PHY 1253 static void gem_begin_auto_negotiation(struct gem *gp, 1254 const struct ethtool_link_ksettings *ep) 1255 { 1256 u32 advertise, features; 1257 int autoneg; 1258 int speed; 1259 int duplex; 1260 u32 advertising; 1261 1262 if (ep) 1263 ethtool_convert_link_mode_to_legacy_u32( 1264 &advertising, ep->link_modes.advertising); 1265 1266 if (gp->phy_type != phy_mii_mdio0 && 1267 gp->phy_type != phy_mii_mdio1) 1268 goto non_mii; 1269 1270 /* Setup advertise */ 1271 if (found_mii_phy(gp)) 1272 features = gp->phy_mii.def->features; 1273 else 1274 features = 0; 1275 1276 advertise = features & ADVERTISE_MASK; 1277 if (gp->phy_mii.advertising != 0) 1278 advertise &= gp->phy_mii.advertising; 1279 1280 autoneg = gp->want_autoneg; 1281 speed = gp->phy_mii.speed; 1282 duplex = gp->phy_mii.duplex; 1283 1284 /* Setup link parameters */ 1285 if (!ep) 1286 goto start_aneg; 1287 if (ep->base.autoneg == AUTONEG_ENABLE) { 1288 advertise = advertising; 1289 autoneg = 1; 1290 } else { 1291 autoneg = 0; 1292 speed = ep->base.speed; 1293 duplex = ep->base.duplex; 1294 } 1295 1296 start_aneg: 1297 /* Sanitize settings based on PHY capabilities */ 1298 if ((features & SUPPORTED_Autoneg) == 0) 1299 autoneg = 0; 1300 if (speed == SPEED_1000 && 1301 !(features & (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full))) 1302 speed = SPEED_100; 1303 if (speed == SPEED_100 && 1304 !(features & (SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full))) 1305 speed = SPEED_10; 1306 if (duplex == DUPLEX_FULL && 1307 !(features & (SUPPORTED_1000baseT_Full | 1308 SUPPORTED_100baseT_Full | 1309 SUPPORTED_10baseT_Full))) 1310 duplex = DUPLEX_HALF; 1311 if (speed == 0) 1312 speed = SPEED_10; 1313 1314 /* If we are asleep, we don't try to actually setup the PHY, we 1315 * just store the settings 1316 */ 1317 if (!netif_device_present(gp->dev)) { 1318 gp->phy_mii.autoneg = gp->want_autoneg = autoneg; 1319 gp->phy_mii.speed = speed; 1320 gp->phy_mii.duplex = duplex; 1321 return; 1322 } 1323 1324 /* Configure PHY & start aneg */ 1325 gp->want_autoneg = autoneg; 1326 if (autoneg) { 1327 if (found_mii_phy(gp)) 1328 gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, advertise); 1329 gp->lstate = link_aneg; 1330 } else { 1331 if (found_mii_phy(gp)) 1332 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, speed, duplex); 1333 gp->lstate = link_force_ok; 1334 } 1335 1336 non_mii: 1337 gp->timer_ticks = 0; 1338 mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); 1339 } 1340 1341 /* A link-up condition has occurred, initialize and enable the 1342 * rest of the chip. 1343 */ 1344 static int gem_set_link_modes(struct gem *gp) 1345 { 1346 struct netdev_queue *txq = netdev_get_tx_queue(gp->dev, 0); 1347 int full_duplex, speed, pause; 1348 u32 val; 1349 1350 full_duplex = 0; 1351 speed = SPEED_10; 1352 pause = 0; 1353 1354 if (found_mii_phy(gp)) { 1355 if (gp->phy_mii.def->ops->read_link(&gp->phy_mii)) 1356 return 1; 1357 full_duplex = (gp->phy_mii.duplex == DUPLEX_FULL); 1358 speed = gp->phy_mii.speed; 1359 pause = gp->phy_mii.pause; 1360 } else if (gp->phy_type == phy_serialink || 1361 gp->phy_type == phy_serdes) { 1362 u32 pcs_lpa = readl(gp->regs + PCS_MIILP); 1363 1364 if ((pcs_lpa & PCS_MIIADV_FD) || gp->phy_type == phy_serdes) 1365 full_duplex = 1; 1366 speed = SPEED_1000; 1367 } 1368 1369 netif_info(gp, link, gp->dev, "Link is up at %d Mbps, %s-duplex\n", 1370 speed, (full_duplex ? "full" : "half")); 1371 1372 1373 /* We take the tx queue lock to avoid collisions between 1374 * this code, the tx path and the NAPI-driven error path 1375 */ 1376 __netif_tx_lock(txq, smp_processor_id()); 1377 1378 val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU); 1379 if (full_duplex) { 1380 val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL); 1381 } else { 1382 /* MAC_TXCFG_NBO must be zero. */ 1383 } 1384 writel(val, gp->regs + MAC_TXCFG); 1385 1386 val = (MAC_XIFCFG_OE | MAC_XIFCFG_LLED); 1387 if (!full_duplex && 1388 (gp->phy_type == phy_mii_mdio0 || 1389 gp->phy_type == phy_mii_mdio1)) { 1390 val |= MAC_XIFCFG_DISE; 1391 } else if (full_duplex) { 1392 val |= MAC_XIFCFG_FLED; 1393 } 1394 1395 if (speed == SPEED_1000) 1396 val |= (MAC_XIFCFG_GMII); 1397 1398 writel(val, gp->regs + MAC_XIFCFG); 1399 1400 /* If gigabit and half-duplex, enable carrier extension 1401 * mode. Else, disable it. 1402 */ 1403 if (speed == SPEED_1000 && !full_duplex) { 1404 val = readl(gp->regs + MAC_TXCFG); 1405 writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); 1406 1407 val = readl(gp->regs + MAC_RXCFG); 1408 writel(val | MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); 1409 } else { 1410 val = readl(gp->regs + MAC_TXCFG); 1411 writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); 1412 1413 val = readl(gp->regs + MAC_RXCFG); 1414 writel(val & ~MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); 1415 } 1416 1417 if (gp->phy_type == phy_serialink || 1418 gp->phy_type == phy_serdes) { 1419 u32 pcs_lpa = readl(gp->regs + PCS_MIILP); 1420 1421 if (pcs_lpa & (PCS_MIIADV_SP | PCS_MIIADV_AP)) 1422 pause = 1; 1423 } 1424 1425 if (!full_duplex) 1426 writel(512, gp->regs + MAC_STIME); 1427 else 1428 writel(64, gp->regs + MAC_STIME); 1429 val = readl(gp->regs + MAC_MCCFG); 1430 if (pause) 1431 val |= (MAC_MCCFG_SPE | MAC_MCCFG_RPE); 1432 else 1433 val &= ~(MAC_MCCFG_SPE | MAC_MCCFG_RPE); 1434 writel(val, gp->regs + MAC_MCCFG); 1435 1436 gem_start_dma(gp); 1437 1438 __netif_tx_unlock(txq); 1439 1440 if (netif_msg_link(gp)) { 1441 if (pause) { 1442 netdev_info(gp->dev, 1443 "Pause is enabled (rxfifo: %d off: %d on: %d)\n", 1444 gp->rx_fifo_sz, 1445 gp->rx_pause_off, 1446 gp->rx_pause_on); 1447 } else { 1448 netdev_info(gp->dev, "Pause is disabled\n"); 1449 } 1450 } 1451 1452 return 0; 1453 } 1454 1455 static int gem_mdio_link_not_up(struct gem *gp) 1456 { 1457 switch (gp->lstate) { 1458 case link_force_ret: 1459 netif_info(gp, link, gp->dev, 1460 "Autoneg failed again, keeping forced mode\n"); 1461 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, 1462 gp->last_forced_speed, DUPLEX_HALF); 1463 gp->timer_ticks = 5; 1464 gp->lstate = link_force_ok; 1465 return 0; 1466 case link_aneg: 1467 /* We try forced modes after a failed aneg only on PHYs that don't 1468 * have "magic_aneg" bit set, which means they internally do the 1469 * while forced-mode thingy. On these, we just restart aneg 1470 */ 1471 if (gp->phy_mii.def->magic_aneg) 1472 return 1; 1473 netif_info(gp, link, gp->dev, "switching to forced 100bt\n"); 1474 /* Try forced modes. */ 1475 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_100, 1476 DUPLEX_HALF); 1477 gp->timer_ticks = 5; 1478 gp->lstate = link_force_try; 1479 return 0; 1480 case link_force_try: 1481 /* Downgrade from 100 to 10 Mbps if necessary. 1482 * If already at 10Mbps, warn user about the 1483 * situation every 10 ticks. 1484 */ 1485 if (gp->phy_mii.speed == SPEED_100) { 1486 gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_10, 1487 DUPLEX_HALF); 1488 gp->timer_ticks = 5; 1489 netif_info(gp, link, gp->dev, 1490 "switching to forced 10bt\n"); 1491 return 0; 1492 } else 1493 return 1; 1494 default: 1495 return 0; 1496 } 1497 } 1498 1499 static void gem_link_timer(struct timer_list *t) 1500 { 1501 struct gem *gp = from_timer(gp, t, link_timer); 1502 struct net_device *dev = gp->dev; 1503 int restart_aneg = 0; 1504 1505 /* There's no point doing anything if we're going to be reset */ 1506 if (gp->reset_task_pending) 1507 return; 1508 1509 if (gp->phy_type == phy_serialink || 1510 gp->phy_type == phy_serdes) { 1511 u32 val = readl(gp->regs + PCS_MIISTAT); 1512 1513 if (!(val & PCS_MIISTAT_LS)) 1514 val = readl(gp->regs + PCS_MIISTAT); 1515 1516 if ((val & PCS_MIISTAT_LS) != 0) { 1517 if (gp->lstate == link_up) 1518 goto restart; 1519 1520 gp->lstate = link_up; 1521 netif_carrier_on(dev); 1522 (void)gem_set_link_modes(gp); 1523 } 1524 goto restart; 1525 } 1526 if (found_mii_phy(gp) && gp->phy_mii.def->ops->poll_link(&gp->phy_mii)) { 1527 /* Ok, here we got a link. If we had it due to a forced 1528 * fallback, and we were configured for autoneg, we do 1529 * retry a short autoneg pass. If you know your hub is 1530 * broken, use ethtool ;) 1531 */ 1532 if (gp->lstate == link_force_try && gp->want_autoneg) { 1533 gp->lstate = link_force_ret; 1534 gp->last_forced_speed = gp->phy_mii.speed; 1535 gp->timer_ticks = 5; 1536 if (netif_msg_link(gp)) 1537 netdev_info(dev, 1538 "Got link after fallback, retrying autoneg once...\n"); 1539 gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising); 1540 } else if (gp->lstate != link_up) { 1541 gp->lstate = link_up; 1542 netif_carrier_on(dev); 1543 if (gem_set_link_modes(gp)) 1544 restart_aneg = 1; 1545 } 1546 } else { 1547 /* If the link was previously up, we restart the 1548 * whole process 1549 */ 1550 if (gp->lstate == link_up) { 1551 gp->lstate = link_down; 1552 netif_info(gp, link, dev, "Link down\n"); 1553 netif_carrier_off(dev); 1554 gem_schedule_reset(gp); 1555 /* The reset task will restart the timer */ 1556 return; 1557 } else if (++gp->timer_ticks > 10) { 1558 if (found_mii_phy(gp)) 1559 restart_aneg = gem_mdio_link_not_up(gp); 1560 else 1561 restart_aneg = 1; 1562 } 1563 } 1564 if (restart_aneg) { 1565 gem_begin_auto_negotiation(gp, NULL); 1566 return; 1567 } 1568 restart: 1569 mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); 1570 } 1571 1572 static void gem_clean_rings(struct gem *gp) 1573 { 1574 struct gem_init_block *gb = gp->init_block; 1575 struct sk_buff *skb; 1576 int i; 1577 dma_addr_t dma_addr; 1578 1579 for (i = 0; i < RX_RING_SIZE; i++) { 1580 struct gem_rxd *rxd; 1581 1582 rxd = &gb->rxd[i]; 1583 if (gp->rx_skbs[i] != NULL) { 1584 skb = gp->rx_skbs[i]; 1585 dma_addr = le64_to_cpu(rxd->buffer); 1586 pci_unmap_page(gp->pdev, dma_addr, 1587 RX_BUF_ALLOC_SIZE(gp), 1588 PCI_DMA_FROMDEVICE); 1589 dev_kfree_skb_any(skb); 1590 gp->rx_skbs[i] = NULL; 1591 } 1592 rxd->status_word = 0; 1593 dma_wmb(); 1594 rxd->buffer = 0; 1595 } 1596 1597 for (i = 0; i < TX_RING_SIZE; i++) { 1598 if (gp->tx_skbs[i] != NULL) { 1599 struct gem_txd *txd; 1600 int frag; 1601 1602 skb = gp->tx_skbs[i]; 1603 gp->tx_skbs[i] = NULL; 1604 1605 for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { 1606 int ent = i & (TX_RING_SIZE - 1); 1607 1608 txd = &gb->txd[ent]; 1609 dma_addr = le64_to_cpu(txd->buffer); 1610 pci_unmap_page(gp->pdev, dma_addr, 1611 le64_to_cpu(txd->control_word) & 1612 TXDCTRL_BUFSZ, PCI_DMA_TODEVICE); 1613 1614 if (frag != skb_shinfo(skb)->nr_frags) 1615 i++; 1616 } 1617 dev_kfree_skb_any(skb); 1618 } 1619 } 1620 } 1621 1622 static void gem_init_rings(struct gem *gp) 1623 { 1624 struct gem_init_block *gb = gp->init_block; 1625 struct net_device *dev = gp->dev; 1626 int i; 1627 dma_addr_t dma_addr; 1628 1629 gp->rx_new = gp->rx_old = gp->tx_new = gp->tx_old = 0; 1630 1631 gem_clean_rings(gp); 1632 1633 gp->rx_buf_sz = max(dev->mtu + ETH_HLEN + VLAN_HLEN, 1634 (unsigned)VLAN_ETH_FRAME_LEN); 1635 1636 for (i = 0; i < RX_RING_SIZE; i++) { 1637 struct sk_buff *skb; 1638 struct gem_rxd *rxd = &gb->rxd[i]; 1639 1640 skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_KERNEL); 1641 if (!skb) { 1642 rxd->buffer = 0; 1643 rxd->status_word = 0; 1644 continue; 1645 } 1646 1647 gp->rx_skbs[i] = skb; 1648 skb_put(skb, (gp->rx_buf_sz + RX_OFFSET)); 1649 dma_addr = pci_map_page(gp->pdev, 1650 virt_to_page(skb->data), 1651 offset_in_page(skb->data), 1652 RX_BUF_ALLOC_SIZE(gp), 1653 PCI_DMA_FROMDEVICE); 1654 rxd->buffer = cpu_to_le64(dma_addr); 1655 dma_wmb(); 1656 rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); 1657 skb_reserve(skb, RX_OFFSET); 1658 } 1659 1660 for (i = 0; i < TX_RING_SIZE; i++) { 1661 struct gem_txd *txd = &gb->txd[i]; 1662 1663 txd->control_word = 0; 1664 dma_wmb(); 1665 txd->buffer = 0; 1666 } 1667 wmb(); 1668 } 1669 1670 /* Init PHY interface and start link poll state machine */ 1671 static void gem_init_phy(struct gem *gp) 1672 { 1673 u32 mifcfg; 1674 1675 /* Revert MIF CFG setting done on stop_phy */ 1676 mifcfg = readl(gp->regs + MIF_CFG); 1677 mifcfg &= ~MIF_CFG_BBMODE; 1678 writel(mifcfg, gp->regs + MIF_CFG); 1679 1680 if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) { 1681 int i; 1682 1683 /* Those delay sucks, the HW seem to love them though, I'll 1684 * serisouly consider breaking some locks here to be able 1685 * to schedule instead 1686 */ 1687 for (i = 0; i < 3; i++) { 1688 #ifdef CONFIG_PPC_PMAC 1689 pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0); 1690 msleep(20); 1691 #endif 1692 /* Some PHYs used by apple have problem getting back to us, 1693 * we do an additional reset here 1694 */ 1695 sungem_phy_write(gp, MII_BMCR, BMCR_RESET); 1696 msleep(20); 1697 if (sungem_phy_read(gp, MII_BMCR) != 0xffff) 1698 break; 1699 if (i == 2) 1700 netdev_warn(gp->dev, "GMAC PHY not responding !\n"); 1701 } 1702 } 1703 1704 if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && 1705 gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { 1706 u32 val; 1707 1708 /* Init datapath mode register. */ 1709 if (gp->phy_type == phy_mii_mdio0 || 1710 gp->phy_type == phy_mii_mdio1) { 1711 val = PCS_DMODE_MGM; 1712 } else if (gp->phy_type == phy_serialink) { 1713 val = PCS_DMODE_SM | PCS_DMODE_GMOE; 1714 } else { 1715 val = PCS_DMODE_ESM; 1716 } 1717 1718 writel(val, gp->regs + PCS_DMODE); 1719 } 1720 1721 if (gp->phy_type == phy_mii_mdio0 || 1722 gp->phy_type == phy_mii_mdio1) { 1723 /* Reset and detect MII PHY */ 1724 sungem_phy_probe(&gp->phy_mii, gp->mii_phy_addr); 1725 1726 /* Init PHY */ 1727 if (gp->phy_mii.def && gp->phy_mii.def->ops->init) 1728 gp->phy_mii.def->ops->init(&gp->phy_mii); 1729 } else { 1730 gem_pcs_reset(gp); 1731 gem_pcs_reinit_adv(gp); 1732 } 1733 1734 /* Default aneg parameters */ 1735 gp->timer_ticks = 0; 1736 gp->lstate = link_down; 1737 netif_carrier_off(gp->dev); 1738 1739 /* Print things out */ 1740 if (gp->phy_type == phy_mii_mdio0 || 1741 gp->phy_type == phy_mii_mdio1) 1742 netdev_info(gp->dev, "Found %s PHY\n", 1743 gp->phy_mii.def ? gp->phy_mii.def->name : "no"); 1744 1745 gem_begin_auto_negotiation(gp, NULL); 1746 } 1747 1748 static void gem_init_dma(struct gem *gp) 1749 { 1750 u64 desc_dma = (u64) gp->gblock_dvma; 1751 u32 val; 1752 1753 val = (TXDMA_CFG_BASE | (0x7ff << 10) | TXDMA_CFG_PMODE); 1754 writel(val, gp->regs + TXDMA_CFG); 1755 1756 writel(desc_dma >> 32, gp->regs + TXDMA_DBHI); 1757 writel(desc_dma & 0xffffffff, gp->regs + TXDMA_DBLOW); 1758 desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); 1759 1760 writel(0, gp->regs + TXDMA_KICK); 1761 1762 val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | 1763 ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); 1764 writel(val, gp->regs + RXDMA_CFG); 1765 1766 writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); 1767 writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); 1768 1769 writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); 1770 1771 val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); 1772 val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); 1773 writel(val, gp->regs + RXDMA_PTHRESH); 1774 1775 if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) 1776 writel(((5 & RXDMA_BLANK_IPKTS) | 1777 ((8 << 12) & RXDMA_BLANK_ITIME)), 1778 gp->regs + RXDMA_BLANK); 1779 else 1780 writel(((5 & RXDMA_BLANK_IPKTS) | 1781 ((4 << 12) & RXDMA_BLANK_ITIME)), 1782 gp->regs + RXDMA_BLANK); 1783 } 1784 1785 static u32 gem_setup_multicast(struct gem *gp) 1786 { 1787 u32 rxcfg = 0; 1788 int i; 1789 1790 if ((gp->dev->flags & IFF_ALLMULTI) || 1791 (netdev_mc_count(gp->dev) > 256)) { 1792 for (i=0; i<16; i++) 1793 writel(0xffff, gp->regs + MAC_HASH0 + (i << 2)); 1794 rxcfg |= MAC_RXCFG_HFE; 1795 } else if (gp->dev->flags & IFF_PROMISC) { 1796 rxcfg |= MAC_RXCFG_PROM; 1797 } else { 1798 u16 hash_table[16]; 1799 u32 crc; 1800 struct netdev_hw_addr *ha; 1801 int i; 1802 1803 memset(hash_table, 0, sizeof(hash_table)); 1804 netdev_for_each_mc_addr(ha, gp->dev) { 1805 crc = ether_crc_le(6, ha->addr); 1806 crc >>= 24; 1807 hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf)); 1808 } 1809 for (i=0; i<16; i++) 1810 writel(hash_table[i], gp->regs + MAC_HASH0 + (i << 2)); 1811 rxcfg |= MAC_RXCFG_HFE; 1812 } 1813 1814 return rxcfg; 1815 } 1816 1817 static void gem_init_mac(struct gem *gp) 1818 { 1819 unsigned char *e = &gp->dev->dev_addr[0]; 1820 1821 writel(0x1bf0, gp->regs + MAC_SNDPAUSE); 1822 1823 writel(0x00, gp->regs + MAC_IPG0); 1824 writel(0x08, gp->regs + MAC_IPG1); 1825 writel(0x04, gp->regs + MAC_IPG2); 1826 writel(0x40, gp->regs + MAC_STIME); 1827 writel(0x40, gp->regs + MAC_MINFSZ); 1828 1829 /* Ethernet payload + header + FCS + optional VLAN tag. */ 1830 writel(0x20000000 | (gp->rx_buf_sz + 4), gp->regs + MAC_MAXFSZ); 1831 1832 writel(0x07, gp->regs + MAC_PASIZE); 1833 writel(0x04, gp->regs + MAC_JAMSIZE); 1834 writel(0x10, gp->regs + MAC_ATTLIM); 1835 writel(0x8808, gp->regs + MAC_MCTYPE); 1836 1837 writel((e[5] | (e[4] << 8)) & 0x3ff, gp->regs + MAC_RANDSEED); 1838 1839 writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); 1840 writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); 1841 writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); 1842 1843 writel(0, gp->regs + MAC_ADDR3); 1844 writel(0, gp->regs + MAC_ADDR4); 1845 writel(0, gp->regs + MAC_ADDR5); 1846 1847 writel(0x0001, gp->regs + MAC_ADDR6); 1848 writel(0xc200, gp->regs + MAC_ADDR7); 1849 writel(0x0180, gp->regs + MAC_ADDR8); 1850 1851 writel(0, gp->regs + MAC_AFILT0); 1852 writel(0, gp->regs + MAC_AFILT1); 1853 writel(0, gp->regs + MAC_AFILT2); 1854 writel(0, gp->regs + MAC_AF21MSK); 1855 writel(0, gp->regs + MAC_AF0MSK); 1856 1857 gp->mac_rx_cfg = gem_setup_multicast(gp); 1858 #ifdef STRIP_FCS 1859 gp->mac_rx_cfg |= MAC_RXCFG_SFCS; 1860 #endif 1861 writel(0, gp->regs + MAC_NCOLL); 1862 writel(0, gp->regs + MAC_FASUCC); 1863 writel(0, gp->regs + MAC_ECOLL); 1864 writel(0, gp->regs + MAC_LCOLL); 1865 writel(0, gp->regs + MAC_DTIMER); 1866 writel(0, gp->regs + MAC_PATMPS); 1867 writel(0, gp->regs + MAC_RFCTR); 1868 writel(0, gp->regs + MAC_LERR); 1869 writel(0, gp->regs + MAC_AERR); 1870 writel(0, gp->regs + MAC_FCSERR); 1871 writel(0, gp->regs + MAC_RXCVERR); 1872 1873 /* Clear RX/TX/MAC/XIF config, we will set these up and enable 1874 * them once a link is established. 1875 */ 1876 writel(0, gp->regs + MAC_TXCFG); 1877 writel(gp->mac_rx_cfg, gp->regs + MAC_RXCFG); 1878 writel(0, gp->regs + MAC_MCCFG); 1879 writel(0, gp->regs + MAC_XIFCFG); 1880 1881 /* Setup MAC interrupts. We want to get all of the interesting 1882 * counter expiration events, but we do not want to hear about 1883 * normal rx/tx as the DMA engine tells us that. 1884 */ 1885 writel(MAC_TXSTAT_XMIT, gp->regs + MAC_TXMASK); 1886 writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); 1887 1888 /* Don't enable even the PAUSE interrupts for now, we 1889 * make no use of those events other than to record them. 1890 */ 1891 writel(0xffffffff, gp->regs + MAC_MCMASK); 1892 1893 /* Don't enable GEM's WOL in normal operations 1894 */ 1895 if (gp->has_wol) 1896 writel(0, gp->regs + WOL_WAKECSR); 1897 } 1898 1899 static void gem_init_pause_thresholds(struct gem *gp) 1900 { 1901 u32 cfg; 1902 1903 /* Calculate pause thresholds. Setting the OFF threshold to the 1904 * full RX fifo size effectively disables PAUSE generation which 1905 * is what we do for 10/100 only GEMs which have FIFOs too small 1906 * to make real gains from PAUSE. 1907 */ 1908 if (gp->rx_fifo_sz <= (2 * 1024)) { 1909 gp->rx_pause_off = gp->rx_pause_on = gp->rx_fifo_sz; 1910 } else { 1911 int max_frame = (gp->rx_buf_sz + 4 + 64) & ~63; 1912 int off = (gp->rx_fifo_sz - (max_frame * 2)); 1913 int on = off - max_frame; 1914 1915 gp->rx_pause_off = off; 1916 gp->rx_pause_on = on; 1917 } 1918 1919 1920 /* Configure the chip "burst" DMA mode & enable some 1921 * HW bug fixes on Apple version 1922 */ 1923 cfg = 0; 1924 if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) 1925 cfg |= GREG_CFG_RONPAULBIT | GREG_CFG_ENBUG2FIX; 1926 #if !defined(CONFIG_SPARC64) && !defined(CONFIG_ALPHA) 1927 cfg |= GREG_CFG_IBURST; 1928 #endif 1929 cfg |= ((31 << 1) & GREG_CFG_TXDMALIM); 1930 cfg |= ((31 << 6) & GREG_CFG_RXDMALIM); 1931 writel(cfg, gp->regs + GREG_CFG); 1932 1933 /* If Infinite Burst didn't stick, then use different 1934 * thresholds (and Apple bug fixes don't exist) 1935 */ 1936 if (!(readl(gp->regs + GREG_CFG) & GREG_CFG_IBURST)) { 1937 cfg = ((2 << 1) & GREG_CFG_TXDMALIM); 1938 cfg |= ((8 << 6) & GREG_CFG_RXDMALIM); 1939 writel(cfg, gp->regs + GREG_CFG); 1940 } 1941 } 1942 1943 static int gem_check_invariants(struct gem *gp) 1944 { 1945 struct pci_dev *pdev = gp->pdev; 1946 u32 mif_cfg; 1947 1948 /* On Apple's sungem, we can't rely on registers as the chip 1949 * was been powered down by the firmware. The PHY is looked 1950 * up later on. 1951 */ 1952 if (pdev->vendor == PCI_VENDOR_ID_APPLE) { 1953 gp->phy_type = phy_mii_mdio0; 1954 gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; 1955 gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; 1956 gp->swrst_base = 0; 1957 1958 mif_cfg = readl(gp->regs + MIF_CFG); 1959 mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1); 1960 mif_cfg |= MIF_CFG_MDI0; 1961 writel(mif_cfg, gp->regs + MIF_CFG); 1962 writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE); 1963 writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG); 1964 1965 /* We hard-code the PHY address so we can properly bring it out of 1966 * reset later on, we can't really probe it at this point, though 1967 * that isn't an issue. 1968 */ 1969 if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC) 1970 gp->mii_phy_addr = 1; 1971 else 1972 gp->mii_phy_addr = 0; 1973 1974 return 0; 1975 } 1976 1977 mif_cfg = readl(gp->regs + MIF_CFG); 1978 1979 if (pdev->vendor == PCI_VENDOR_ID_SUN && 1980 pdev->device == PCI_DEVICE_ID_SUN_RIO_GEM) { 1981 /* One of the MII PHYs _must_ be present 1982 * as this chip has no gigabit PHY. 1983 */ 1984 if ((mif_cfg & (MIF_CFG_MDI0 | MIF_CFG_MDI1)) == 0) { 1985 pr_err("RIO GEM lacks MII phy, mif_cfg[%08x]\n", 1986 mif_cfg); 1987 return -1; 1988 } 1989 } 1990 1991 /* Determine initial PHY interface type guess. MDIO1 is the 1992 * external PHY and thus takes precedence over MDIO0. 1993 */ 1994 1995 if (mif_cfg & MIF_CFG_MDI1) { 1996 gp->phy_type = phy_mii_mdio1; 1997 mif_cfg |= MIF_CFG_PSELECT; 1998 writel(mif_cfg, gp->regs + MIF_CFG); 1999 } else if (mif_cfg & MIF_CFG_MDI0) { 2000 gp->phy_type = phy_mii_mdio0; 2001 mif_cfg &= ~MIF_CFG_PSELECT; 2002 writel(mif_cfg, gp->regs + MIF_CFG); 2003 } else { 2004 #ifdef CONFIG_SPARC 2005 const char *p; 2006 2007 p = of_get_property(gp->of_node, "shared-pins", NULL); 2008 if (p && !strcmp(p, "serdes")) 2009 gp->phy_type = phy_serdes; 2010 else 2011 #endif 2012 gp->phy_type = phy_serialink; 2013 } 2014 if (gp->phy_type == phy_mii_mdio1 || 2015 gp->phy_type == phy_mii_mdio0) { 2016 int i; 2017 2018 for (i = 0; i < 32; i++) { 2019 gp->mii_phy_addr = i; 2020 if (sungem_phy_read(gp, MII_BMCR) != 0xffff) 2021 break; 2022 } 2023 if (i == 32) { 2024 if (pdev->device != PCI_DEVICE_ID_SUN_GEM) { 2025 pr_err("RIO MII phy will not respond\n"); 2026 return -1; 2027 } 2028 gp->phy_type = phy_serdes; 2029 } 2030 } 2031 2032 /* Fetch the FIFO configurations now too. */ 2033 gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; 2034 gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; 2035 2036 if (pdev->vendor == PCI_VENDOR_ID_SUN) { 2037 if (pdev->device == PCI_DEVICE_ID_SUN_GEM) { 2038 if (gp->tx_fifo_sz != (9 * 1024) || 2039 gp->rx_fifo_sz != (20 * 1024)) { 2040 pr_err("GEM has bogus fifo sizes tx(%d) rx(%d)\n", 2041 gp->tx_fifo_sz, gp->rx_fifo_sz); 2042 return -1; 2043 } 2044 gp->swrst_base = 0; 2045 } else { 2046 if (gp->tx_fifo_sz != (2 * 1024) || 2047 gp->rx_fifo_sz != (2 * 1024)) { 2048 pr_err("RIO GEM has bogus fifo sizes tx(%d) rx(%d)\n", 2049 gp->tx_fifo_sz, gp->rx_fifo_sz); 2050 return -1; 2051 } 2052 gp->swrst_base = (64 / 4) << GREG_SWRST_CACHE_SHIFT; 2053 } 2054 } 2055 2056 return 0; 2057 } 2058 2059 static void gem_reinit_chip(struct gem *gp) 2060 { 2061 /* Reset the chip */ 2062 gem_reset(gp); 2063 2064 /* Make sure ints are disabled */ 2065 gem_disable_ints(gp); 2066 2067 /* Allocate & setup ring buffers */ 2068 gem_init_rings(gp); 2069 2070 /* Configure pause thresholds */ 2071 gem_init_pause_thresholds(gp); 2072 2073 /* Init DMA & MAC engines */ 2074 gem_init_dma(gp); 2075 gem_init_mac(gp); 2076 } 2077 2078 2079 static void gem_stop_phy(struct gem *gp, int wol) 2080 { 2081 u32 mifcfg; 2082 2083 /* Let the chip settle down a bit, it seems that helps 2084 * for sleep mode on some models 2085 */ 2086 msleep(10); 2087 2088 /* Make sure we aren't polling PHY status change. We 2089 * don't currently use that feature though 2090 */ 2091 mifcfg = readl(gp->regs + MIF_CFG); 2092 mifcfg &= ~MIF_CFG_POLL; 2093 writel(mifcfg, gp->regs + MIF_CFG); 2094 2095 if (wol && gp->has_wol) { 2096 unsigned char *e = &gp->dev->dev_addr[0]; 2097 u32 csr; 2098 2099 /* Setup wake-on-lan for MAGIC packet */ 2100 writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB, 2101 gp->regs + MAC_RXCFG); 2102 writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0); 2103 writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1); 2104 writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2); 2105 2106 writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT); 2107 csr = WOL_WAKECSR_ENABLE; 2108 if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0) 2109 csr |= WOL_WAKECSR_MII; 2110 writel(csr, gp->regs + WOL_WAKECSR); 2111 } else { 2112 writel(0, gp->regs + MAC_RXCFG); 2113 (void)readl(gp->regs + MAC_RXCFG); 2114 /* Machine sleep will die in strange ways if we 2115 * dont wait a bit here, looks like the chip takes 2116 * some time to really shut down 2117 */ 2118 msleep(10); 2119 } 2120 2121 writel(0, gp->regs + MAC_TXCFG); 2122 writel(0, gp->regs + MAC_XIFCFG); 2123 writel(0, gp->regs + TXDMA_CFG); 2124 writel(0, gp->regs + RXDMA_CFG); 2125 2126 if (!wol) { 2127 gem_reset(gp); 2128 writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST); 2129 writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); 2130 2131 if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend) 2132 gp->phy_mii.def->ops->suspend(&gp->phy_mii); 2133 2134 /* According to Apple, we must set the MDIO pins to this begnign 2135 * state or we may 1) eat more current, 2) damage some PHYs 2136 */ 2137 writel(mifcfg | MIF_CFG_BBMODE, gp->regs + MIF_CFG); 2138 writel(0, gp->regs + MIF_BBCLK); 2139 writel(0, gp->regs + MIF_BBDATA); 2140 writel(0, gp->regs + MIF_BBOENAB); 2141 writel(MAC_XIFCFG_GMII | MAC_XIFCFG_LBCK, gp->regs + MAC_XIFCFG); 2142 (void) readl(gp->regs + MAC_XIFCFG); 2143 } 2144 } 2145 2146 static int gem_do_start(struct net_device *dev) 2147 { 2148 struct gem *gp = netdev_priv(dev); 2149 int rc; 2150 2151 /* Enable the cell */ 2152 gem_get_cell(gp); 2153 2154 /* Make sure PCI access and bus master are enabled */ 2155 rc = pci_enable_device(gp->pdev); 2156 if (rc) { 2157 netdev_err(dev, "Failed to enable chip on PCI bus !\n"); 2158 2159 /* Put cell and forget it for now, it will be considered as 2160 * still asleep, a new sleep cycle may bring it back 2161 */ 2162 gem_put_cell(gp); 2163 return -ENXIO; 2164 } 2165 pci_set_master(gp->pdev); 2166 2167 /* Init & setup chip hardware */ 2168 gem_reinit_chip(gp); 2169 2170 /* An interrupt might come in handy */ 2171 rc = request_irq(gp->pdev->irq, gem_interrupt, 2172 IRQF_SHARED, dev->name, (void *)dev); 2173 if (rc) { 2174 netdev_err(dev, "failed to request irq !\n"); 2175 2176 gem_reset(gp); 2177 gem_clean_rings(gp); 2178 gem_put_cell(gp); 2179 return rc; 2180 } 2181 2182 /* Mark us as attached again if we come from resume(), this has 2183 * no effect if we weren't detached and needs to be done now. 2184 */ 2185 netif_device_attach(dev); 2186 2187 /* Restart NAPI & queues */ 2188 gem_netif_start(gp); 2189 2190 /* Detect & init PHY, start autoneg etc... this will 2191 * eventually result in starting DMA operations when 2192 * the link is up 2193 */ 2194 gem_init_phy(gp); 2195 2196 return 0; 2197 } 2198 2199 static void gem_do_stop(struct net_device *dev, int wol) 2200 { 2201 struct gem *gp = netdev_priv(dev); 2202 2203 /* Stop NAPI and stop tx queue */ 2204 gem_netif_stop(gp); 2205 2206 /* Make sure ints are disabled. We don't care about 2207 * synchronizing as NAPI is disabled, thus a stray 2208 * interrupt will do nothing bad (our irq handler 2209 * just schedules NAPI) 2210 */ 2211 gem_disable_ints(gp); 2212 2213 /* Stop the link timer */ 2214 del_timer_sync(&gp->link_timer); 2215 2216 /* We cannot cancel the reset task while holding the 2217 * rtnl lock, we'd get an A->B / B->A deadlock stituation 2218 * if we did. This is not an issue however as the reset 2219 * task is synchronized vs. us (rtnl_lock) and will do 2220 * nothing if the device is down or suspended. We do 2221 * still clear reset_task_pending to avoid a spurrious 2222 * reset later on in case we do resume before it gets 2223 * scheduled. 2224 */ 2225 gp->reset_task_pending = 0; 2226 2227 /* If we are going to sleep with WOL */ 2228 gem_stop_dma(gp); 2229 msleep(10); 2230 if (!wol) 2231 gem_reset(gp); 2232 msleep(10); 2233 2234 /* Get rid of rings */ 2235 gem_clean_rings(gp); 2236 2237 /* No irq needed anymore */ 2238 free_irq(gp->pdev->irq, (void *) dev); 2239 2240 /* Shut the PHY down eventually and setup WOL */ 2241 gem_stop_phy(gp, wol); 2242 2243 /* Make sure bus master is disabled */ 2244 pci_disable_device(gp->pdev); 2245 2246 /* Cell not needed neither if no WOL */ 2247 if (!wol) 2248 gem_put_cell(gp); 2249 } 2250 2251 static void gem_reset_task(struct work_struct *work) 2252 { 2253 struct gem *gp = container_of(work, struct gem, reset_task); 2254 2255 /* Lock out the network stack (essentially shield ourselves 2256 * against a racing open, close, control call, or suspend 2257 */ 2258 rtnl_lock(); 2259 2260 /* Skip the reset task if suspended or closed, or if it's 2261 * been cancelled by gem_do_stop (see comment there) 2262 */ 2263 if (!netif_device_present(gp->dev) || 2264 !netif_running(gp->dev) || 2265 !gp->reset_task_pending) { 2266 rtnl_unlock(); 2267 return; 2268 } 2269 2270 /* Stop the link timer */ 2271 del_timer_sync(&gp->link_timer); 2272 2273 /* Stop NAPI and tx */ 2274 gem_netif_stop(gp); 2275 2276 /* Reset the chip & rings */ 2277 gem_reinit_chip(gp); 2278 if (gp->lstate == link_up) 2279 gem_set_link_modes(gp); 2280 2281 /* Restart NAPI and Tx */ 2282 gem_netif_start(gp); 2283 2284 /* We are back ! */ 2285 gp->reset_task_pending = 0; 2286 2287 /* If the link is not up, restart autoneg, else restart the 2288 * polling timer 2289 */ 2290 if (gp->lstate != link_up) 2291 gem_begin_auto_negotiation(gp, NULL); 2292 else 2293 mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); 2294 2295 rtnl_unlock(); 2296 } 2297 2298 static int gem_open(struct net_device *dev) 2299 { 2300 /* We allow open while suspended, we just do nothing, 2301 * the chip will be initialized in resume() 2302 */ 2303 if (netif_device_present(dev)) 2304 return gem_do_start(dev); 2305 return 0; 2306 } 2307 2308 static int gem_close(struct net_device *dev) 2309 { 2310 if (netif_device_present(dev)) 2311 gem_do_stop(dev, 0); 2312 2313 return 0; 2314 } 2315 2316 #ifdef CONFIG_PM 2317 static int gem_suspend(struct pci_dev *pdev, pm_message_t state) 2318 { 2319 struct net_device *dev = pci_get_drvdata(pdev); 2320 struct gem *gp = netdev_priv(dev); 2321 2322 /* Lock the network stack first to avoid racing with open/close, 2323 * reset task and setting calls 2324 */ 2325 rtnl_lock(); 2326 2327 /* Not running, mark ourselves non-present, no need for 2328 * a lock here 2329 */ 2330 if (!netif_running(dev)) { 2331 netif_device_detach(dev); 2332 rtnl_unlock(); 2333 return 0; 2334 } 2335 netdev_info(dev, "suspending, WakeOnLan %s\n", 2336 (gp->wake_on_lan && netif_running(dev)) ? 2337 "enabled" : "disabled"); 2338 2339 /* Tell the network stack we're gone. gem_do_stop() below will 2340 * synchronize with TX, stop NAPI etc... 2341 */ 2342 netif_device_detach(dev); 2343 2344 /* Switch off chip, remember WOL setting */ 2345 gp->asleep_wol = !!gp->wake_on_lan; 2346 gem_do_stop(dev, gp->asleep_wol); 2347 2348 /* Unlock the network stack */ 2349 rtnl_unlock(); 2350 2351 return 0; 2352 } 2353 2354 static int gem_resume(struct pci_dev *pdev) 2355 { 2356 struct net_device *dev = pci_get_drvdata(pdev); 2357 struct gem *gp = netdev_priv(dev); 2358 2359 /* See locking comment in gem_suspend */ 2360 rtnl_lock(); 2361 2362 /* Not running, mark ourselves present, no need for 2363 * a lock here 2364 */ 2365 if (!netif_running(dev)) { 2366 netif_device_attach(dev); 2367 rtnl_unlock(); 2368 return 0; 2369 } 2370 2371 /* Restart chip. If that fails there isn't much we can do, we 2372 * leave things stopped. 2373 */ 2374 gem_do_start(dev); 2375 2376 /* If we had WOL enabled, the cell clock was never turned off during 2377 * sleep, so we end up beeing unbalanced. Fix that here 2378 */ 2379 if (gp->asleep_wol) 2380 gem_put_cell(gp); 2381 2382 /* Unlock the network stack */ 2383 rtnl_unlock(); 2384 2385 return 0; 2386 } 2387 #endif /* CONFIG_PM */ 2388 2389 static struct net_device_stats *gem_get_stats(struct net_device *dev) 2390 { 2391 struct gem *gp = netdev_priv(dev); 2392 2393 /* I have seen this being called while the PM was in progress, 2394 * so we shield against this. Let's also not poke at registers 2395 * while the reset task is going on. 2396 * 2397 * TODO: Move stats collection elsewhere (link timer ?) and 2398 * make this a nop to avoid all those synchro issues 2399 */ 2400 if (!netif_device_present(dev) || !netif_running(dev)) 2401 goto bail; 2402 2403 /* Better safe than sorry... */ 2404 if (WARN_ON(!gp->cell_enabled)) 2405 goto bail; 2406 2407 dev->stats.rx_crc_errors += readl(gp->regs + MAC_FCSERR); 2408 writel(0, gp->regs + MAC_FCSERR); 2409 2410 dev->stats.rx_frame_errors += readl(gp->regs + MAC_AERR); 2411 writel(0, gp->regs + MAC_AERR); 2412 2413 dev->stats.rx_length_errors += readl(gp->regs + MAC_LERR); 2414 writel(0, gp->regs + MAC_LERR); 2415 2416 dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL); 2417 dev->stats.collisions += 2418 (readl(gp->regs + MAC_ECOLL) + readl(gp->regs + MAC_LCOLL)); 2419 writel(0, gp->regs + MAC_ECOLL); 2420 writel(0, gp->regs + MAC_LCOLL); 2421 bail: 2422 return &dev->stats; 2423 } 2424 2425 static int gem_set_mac_address(struct net_device *dev, void *addr) 2426 { 2427 struct sockaddr *macaddr = (struct sockaddr *) addr; 2428 struct gem *gp = netdev_priv(dev); 2429 unsigned char *e = &dev->dev_addr[0]; 2430 2431 if (!is_valid_ether_addr(macaddr->sa_data)) 2432 return -EADDRNOTAVAIL; 2433 2434 memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len); 2435 2436 /* We'll just catch it later when the device is up'd or resumed */ 2437 if (!netif_running(dev) || !netif_device_present(dev)) 2438 return 0; 2439 2440 /* Better safe than sorry... */ 2441 if (WARN_ON(!gp->cell_enabled)) 2442 return 0; 2443 2444 writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); 2445 writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); 2446 writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); 2447 2448 return 0; 2449 } 2450 2451 static void gem_set_multicast(struct net_device *dev) 2452 { 2453 struct gem *gp = netdev_priv(dev); 2454 u32 rxcfg, rxcfg_new; 2455 int limit = 10000; 2456 2457 if (!netif_running(dev) || !netif_device_present(dev)) 2458 return; 2459 2460 /* Better safe than sorry... */ 2461 if (gp->reset_task_pending || WARN_ON(!gp->cell_enabled)) 2462 return; 2463 2464 rxcfg = readl(gp->regs + MAC_RXCFG); 2465 rxcfg_new = gem_setup_multicast(gp); 2466 #ifdef STRIP_FCS 2467 rxcfg_new |= MAC_RXCFG_SFCS; 2468 #endif 2469 gp->mac_rx_cfg = rxcfg_new; 2470 2471 writel(rxcfg & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); 2472 while (readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB) { 2473 if (!limit--) 2474 break; 2475 udelay(10); 2476 } 2477 2478 rxcfg &= ~(MAC_RXCFG_PROM | MAC_RXCFG_HFE); 2479 rxcfg |= rxcfg_new; 2480 2481 writel(rxcfg, gp->regs + MAC_RXCFG); 2482 } 2483 2484 /* Jumbo-grams don't seem to work :-( */ 2485 #define GEM_MIN_MTU ETH_MIN_MTU 2486 #if 1 2487 #define GEM_MAX_MTU ETH_DATA_LEN 2488 #else 2489 #define GEM_MAX_MTU 9000 2490 #endif 2491 2492 static int gem_change_mtu(struct net_device *dev, int new_mtu) 2493 { 2494 struct gem *gp = netdev_priv(dev); 2495 2496 dev->mtu = new_mtu; 2497 2498 /* We'll just catch it later when the device is up'd or resumed */ 2499 if (!netif_running(dev) || !netif_device_present(dev)) 2500 return 0; 2501 2502 /* Better safe than sorry... */ 2503 if (WARN_ON(!gp->cell_enabled)) 2504 return 0; 2505 2506 gem_netif_stop(gp); 2507 gem_reinit_chip(gp); 2508 if (gp->lstate == link_up) 2509 gem_set_link_modes(gp); 2510 gem_netif_start(gp); 2511 2512 return 0; 2513 } 2514 2515 static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 2516 { 2517 struct gem *gp = netdev_priv(dev); 2518 2519 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 2520 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 2521 strlcpy(info->bus_info, pci_name(gp->pdev), sizeof(info->bus_info)); 2522 } 2523 2524 static int gem_get_link_ksettings(struct net_device *dev, 2525 struct ethtool_link_ksettings *cmd) 2526 { 2527 struct gem *gp = netdev_priv(dev); 2528 u32 supported, advertising; 2529 2530 if (gp->phy_type == phy_mii_mdio0 || 2531 gp->phy_type == phy_mii_mdio1) { 2532 if (gp->phy_mii.def) 2533 supported = gp->phy_mii.def->features; 2534 else 2535 supported = (SUPPORTED_10baseT_Half | 2536 SUPPORTED_10baseT_Full); 2537 2538 /* XXX hardcoded stuff for now */ 2539 cmd->base.port = PORT_MII; 2540 cmd->base.phy_address = 0; /* XXX fixed PHYAD */ 2541 2542 /* Return current PHY settings */ 2543 cmd->base.autoneg = gp->want_autoneg; 2544 cmd->base.speed = gp->phy_mii.speed; 2545 cmd->base.duplex = gp->phy_mii.duplex; 2546 advertising = gp->phy_mii.advertising; 2547 2548 /* If we started with a forced mode, we don't have a default 2549 * advertise set, we need to return something sensible so 2550 * userland can re-enable autoneg properly. 2551 */ 2552 if (advertising == 0) 2553 advertising = supported; 2554 } else { // XXX PCS ? 2555 supported = 2556 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | 2557 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | 2558 SUPPORTED_Autoneg); 2559 advertising = supported; 2560 cmd->base.speed = 0; 2561 cmd->base.duplex = 0; 2562 cmd->base.port = 0; 2563 cmd->base.phy_address = 0; 2564 cmd->base.autoneg = 0; 2565 2566 /* serdes means usually a Fibre connector, with most fixed */ 2567 if (gp->phy_type == phy_serdes) { 2568 cmd->base.port = PORT_FIBRE; 2569 supported = (SUPPORTED_1000baseT_Half | 2570 SUPPORTED_1000baseT_Full | 2571 SUPPORTED_FIBRE | SUPPORTED_Autoneg | 2572 SUPPORTED_Pause | SUPPORTED_Asym_Pause); 2573 advertising = supported; 2574 if (gp->lstate == link_up) 2575 cmd->base.speed = SPEED_1000; 2576 cmd->base.duplex = DUPLEX_FULL; 2577 cmd->base.autoneg = 1; 2578 } 2579 } 2580 2581 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2582 supported); 2583 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2584 advertising); 2585 2586 return 0; 2587 } 2588 2589 static int gem_set_link_ksettings(struct net_device *dev, 2590 const struct ethtool_link_ksettings *cmd) 2591 { 2592 struct gem *gp = netdev_priv(dev); 2593 u32 speed = cmd->base.speed; 2594 u32 advertising; 2595 2596 ethtool_convert_link_mode_to_legacy_u32(&advertising, 2597 cmd->link_modes.advertising); 2598 2599 /* Verify the settings we care about. */ 2600 if (cmd->base.autoneg != AUTONEG_ENABLE && 2601 cmd->base.autoneg != AUTONEG_DISABLE) 2602 return -EINVAL; 2603 2604 if (cmd->base.autoneg == AUTONEG_ENABLE && 2605 advertising == 0) 2606 return -EINVAL; 2607 2608 if (cmd->base.autoneg == AUTONEG_DISABLE && 2609 ((speed != SPEED_1000 && 2610 speed != SPEED_100 && 2611 speed != SPEED_10) || 2612 (cmd->base.duplex != DUPLEX_HALF && 2613 cmd->base.duplex != DUPLEX_FULL))) 2614 return -EINVAL; 2615 2616 /* Apply settings and restart link process. */ 2617 if (netif_device_present(gp->dev)) { 2618 del_timer_sync(&gp->link_timer); 2619 gem_begin_auto_negotiation(gp, cmd); 2620 } 2621 2622 return 0; 2623 } 2624 2625 static int gem_nway_reset(struct net_device *dev) 2626 { 2627 struct gem *gp = netdev_priv(dev); 2628 2629 if (!gp->want_autoneg) 2630 return -EINVAL; 2631 2632 /* Restart link process */ 2633 if (netif_device_present(gp->dev)) { 2634 del_timer_sync(&gp->link_timer); 2635 gem_begin_auto_negotiation(gp, NULL); 2636 } 2637 2638 return 0; 2639 } 2640 2641 static u32 gem_get_msglevel(struct net_device *dev) 2642 { 2643 struct gem *gp = netdev_priv(dev); 2644 return gp->msg_enable; 2645 } 2646 2647 static void gem_set_msglevel(struct net_device *dev, u32 value) 2648 { 2649 struct gem *gp = netdev_priv(dev); 2650 gp->msg_enable = value; 2651 } 2652 2653 2654 /* Add more when I understand how to program the chip */ 2655 /* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */ 2656 2657 #define WOL_SUPPORTED_MASK (WAKE_MAGIC) 2658 2659 static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 2660 { 2661 struct gem *gp = netdev_priv(dev); 2662 2663 /* Add more when I understand how to program the chip */ 2664 if (gp->has_wol) { 2665 wol->supported = WOL_SUPPORTED_MASK; 2666 wol->wolopts = gp->wake_on_lan; 2667 } else { 2668 wol->supported = 0; 2669 wol->wolopts = 0; 2670 } 2671 } 2672 2673 static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 2674 { 2675 struct gem *gp = netdev_priv(dev); 2676 2677 if (!gp->has_wol) 2678 return -EOPNOTSUPP; 2679 gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK; 2680 return 0; 2681 } 2682 2683 static const struct ethtool_ops gem_ethtool_ops = { 2684 .get_drvinfo = gem_get_drvinfo, 2685 .get_link = ethtool_op_get_link, 2686 .nway_reset = gem_nway_reset, 2687 .get_msglevel = gem_get_msglevel, 2688 .set_msglevel = gem_set_msglevel, 2689 .get_wol = gem_get_wol, 2690 .set_wol = gem_set_wol, 2691 .get_link_ksettings = gem_get_link_ksettings, 2692 .set_link_ksettings = gem_set_link_ksettings, 2693 }; 2694 2695 static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2696 { 2697 struct gem *gp = netdev_priv(dev); 2698 struct mii_ioctl_data *data = if_mii(ifr); 2699 int rc = -EOPNOTSUPP; 2700 2701 /* For SIOCGMIIREG and SIOCSMIIREG the core checks for us that 2702 * netif_device_present() is true and holds rtnl_lock for us 2703 * so we have nothing to worry about 2704 */ 2705 2706 switch (cmd) { 2707 case SIOCGMIIPHY: /* Get address of MII PHY in use. */ 2708 data->phy_id = gp->mii_phy_addr; 2709 /* Fallthrough... */ 2710 2711 case SIOCGMIIREG: /* Read MII PHY register. */ 2712 data->val_out = __sungem_phy_read(gp, data->phy_id & 0x1f, 2713 data->reg_num & 0x1f); 2714 rc = 0; 2715 break; 2716 2717 case SIOCSMIIREG: /* Write MII PHY register. */ 2718 __sungem_phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, 2719 data->val_in); 2720 rc = 0; 2721 break; 2722 } 2723 return rc; 2724 } 2725 2726 #if (!defined(CONFIG_SPARC) && !defined(CONFIG_PPC_PMAC)) 2727 /* Fetch MAC address from vital product data of PCI ROM. */ 2728 static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr) 2729 { 2730 int this_offset; 2731 2732 for (this_offset = 0x20; this_offset < len; this_offset++) { 2733 void __iomem *p = rom_base + this_offset; 2734 int i; 2735 2736 if (readb(p + 0) != 0x90 || 2737 readb(p + 1) != 0x00 || 2738 readb(p + 2) != 0x09 || 2739 readb(p + 3) != 0x4e || 2740 readb(p + 4) != 0x41 || 2741 readb(p + 5) != 0x06) 2742 continue; 2743 2744 this_offset += 6; 2745 p += 6; 2746 2747 for (i = 0; i < 6; i++) 2748 dev_addr[i] = readb(p + i); 2749 return 1; 2750 } 2751 return 0; 2752 } 2753 2754 static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr) 2755 { 2756 size_t size; 2757 void __iomem *p = pci_map_rom(pdev, &size); 2758 2759 if (p) { 2760 int found; 2761 2762 found = readb(p) == 0x55 && 2763 readb(p + 1) == 0xaa && 2764 find_eth_addr_in_vpd(p, (64 * 1024), dev_addr); 2765 pci_unmap_rom(pdev, p); 2766 if (found) 2767 return; 2768 } 2769 2770 /* Sun MAC prefix then 3 random bytes. */ 2771 dev_addr[0] = 0x08; 2772 dev_addr[1] = 0x00; 2773 dev_addr[2] = 0x20; 2774 get_random_bytes(dev_addr + 3, 3); 2775 } 2776 #endif /* not Sparc and not PPC */ 2777 2778 static int gem_get_device_address(struct gem *gp) 2779 { 2780 #if defined(CONFIG_SPARC) || defined(CONFIG_PPC_PMAC) 2781 struct net_device *dev = gp->dev; 2782 const unsigned char *addr; 2783 2784 addr = of_get_property(gp->of_node, "local-mac-address", NULL); 2785 if (addr == NULL) { 2786 #ifdef CONFIG_SPARC 2787 addr = idprom->id_ethaddr; 2788 #else 2789 printk("\n"); 2790 pr_err("%s: can't get mac-address\n", dev->name); 2791 return -1; 2792 #endif 2793 } 2794 memcpy(dev->dev_addr, addr, ETH_ALEN); 2795 #else 2796 get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr); 2797 #endif 2798 return 0; 2799 } 2800 2801 static void gem_remove_one(struct pci_dev *pdev) 2802 { 2803 struct net_device *dev = pci_get_drvdata(pdev); 2804 2805 if (dev) { 2806 struct gem *gp = netdev_priv(dev); 2807 2808 unregister_netdev(dev); 2809 2810 /* Ensure reset task is truly gone */ 2811 cancel_work_sync(&gp->reset_task); 2812 2813 /* Free resources */ 2814 pci_free_consistent(pdev, 2815 sizeof(struct gem_init_block), 2816 gp->init_block, 2817 gp->gblock_dvma); 2818 iounmap(gp->regs); 2819 pci_release_regions(pdev); 2820 free_netdev(dev); 2821 } 2822 } 2823 2824 static const struct net_device_ops gem_netdev_ops = { 2825 .ndo_open = gem_open, 2826 .ndo_stop = gem_close, 2827 .ndo_start_xmit = gem_start_xmit, 2828 .ndo_get_stats = gem_get_stats, 2829 .ndo_set_rx_mode = gem_set_multicast, 2830 .ndo_do_ioctl = gem_ioctl, 2831 .ndo_tx_timeout = gem_tx_timeout, 2832 .ndo_change_mtu = gem_change_mtu, 2833 .ndo_validate_addr = eth_validate_addr, 2834 .ndo_set_mac_address = gem_set_mac_address, 2835 #ifdef CONFIG_NET_POLL_CONTROLLER 2836 .ndo_poll_controller = gem_poll_controller, 2837 #endif 2838 }; 2839 2840 static int gem_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 2841 { 2842 unsigned long gemreg_base, gemreg_len; 2843 struct net_device *dev; 2844 struct gem *gp; 2845 int err, pci_using_dac; 2846 2847 printk_once(KERN_INFO "%s", version); 2848 2849 /* Apple gmac note: during probe, the chip is powered up by 2850 * the arch code to allow the code below to work (and to let 2851 * the chip be probed on the config space. It won't stay powered 2852 * up until the interface is brought up however, so we can't rely 2853 * on register configuration done at this point. 2854 */ 2855 err = pci_enable_device(pdev); 2856 if (err) { 2857 pr_err("Cannot enable MMIO operation, aborting\n"); 2858 return err; 2859 } 2860 pci_set_master(pdev); 2861 2862 /* Configure DMA attributes. */ 2863 2864 /* All of the GEM documentation states that 64-bit DMA addressing 2865 * is fully supported and should work just fine. However the 2866 * front end for RIO based GEMs is different and only supports 2867 * 32-bit addressing. 2868 * 2869 * For now we assume the various PPC GEMs are 32-bit only as well. 2870 */ 2871 if (pdev->vendor == PCI_VENDOR_ID_SUN && 2872 pdev->device == PCI_DEVICE_ID_SUN_GEM && 2873 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 2874 pci_using_dac = 1; 2875 } else { 2876 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2877 if (err) { 2878 pr_err("No usable DMA configuration, aborting\n"); 2879 goto err_disable_device; 2880 } 2881 pci_using_dac = 0; 2882 } 2883 2884 gemreg_base = pci_resource_start(pdev, 0); 2885 gemreg_len = pci_resource_len(pdev, 0); 2886 2887 if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) { 2888 pr_err("Cannot find proper PCI device base address, aborting\n"); 2889 err = -ENODEV; 2890 goto err_disable_device; 2891 } 2892 2893 dev = alloc_etherdev(sizeof(*gp)); 2894 if (!dev) { 2895 err = -ENOMEM; 2896 goto err_disable_device; 2897 } 2898 SET_NETDEV_DEV(dev, &pdev->dev); 2899 2900 gp = netdev_priv(dev); 2901 2902 err = pci_request_regions(pdev, DRV_NAME); 2903 if (err) { 2904 pr_err("Cannot obtain PCI resources, aborting\n"); 2905 goto err_out_free_netdev; 2906 } 2907 2908 gp->pdev = pdev; 2909 gp->dev = dev; 2910 2911 gp->msg_enable = DEFAULT_MSG; 2912 2913 timer_setup(&gp->link_timer, gem_link_timer, 0); 2914 2915 INIT_WORK(&gp->reset_task, gem_reset_task); 2916 2917 gp->lstate = link_down; 2918 gp->timer_ticks = 0; 2919 netif_carrier_off(dev); 2920 2921 gp->regs = ioremap(gemreg_base, gemreg_len); 2922 if (!gp->regs) { 2923 pr_err("Cannot map device registers, aborting\n"); 2924 err = -EIO; 2925 goto err_out_free_res; 2926 } 2927 2928 /* On Apple, we want a reference to the Open Firmware device-tree 2929 * node. We use it for clock control. 2930 */ 2931 #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC) 2932 gp->of_node = pci_device_to_OF_node(pdev); 2933 #endif 2934 2935 /* Only Apple version supports WOL afaik */ 2936 if (pdev->vendor == PCI_VENDOR_ID_APPLE) 2937 gp->has_wol = 1; 2938 2939 /* Make sure cell is enabled */ 2940 gem_get_cell(gp); 2941 2942 /* Make sure everything is stopped and in init state */ 2943 gem_reset(gp); 2944 2945 /* Fill up the mii_phy structure (even if we won't use it) */ 2946 gp->phy_mii.dev = dev; 2947 gp->phy_mii.mdio_read = _sungem_phy_read; 2948 gp->phy_mii.mdio_write = _sungem_phy_write; 2949 #ifdef CONFIG_PPC_PMAC 2950 gp->phy_mii.platform_data = gp->of_node; 2951 #endif 2952 /* By default, we start with autoneg */ 2953 gp->want_autoneg = 1; 2954 2955 /* Check fifo sizes, PHY type, etc... */ 2956 if (gem_check_invariants(gp)) { 2957 err = -ENODEV; 2958 goto err_out_iounmap; 2959 } 2960 2961 /* It is guaranteed that the returned buffer will be at least 2962 * PAGE_SIZE aligned. 2963 */ 2964 gp->init_block = (struct gem_init_block *) 2965 pci_alloc_consistent(pdev, sizeof(struct gem_init_block), 2966 &gp->gblock_dvma); 2967 if (!gp->init_block) { 2968 pr_err("Cannot allocate init block, aborting\n"); 2969 err = -ENOMEM; 2970 goto err_out_iounmap; 2971 } 2972 2973 err = gem_get_device_address(gp); 2974 if (err) 2975 goto err_out_free_consistent; 2976 2977 dev->netdev_ops = &gem_netdev_ops; 2978 netif_napi_add(dev, &gp->napi, gem_poll, 64); 2979 dev->ethtool_ops = &gem_ethtool_ops; 2980 dev->watchdog_timeo = 5 * HZ; 2981 dev->dma = 0; 2982 2983 /* Set that now, in case PM kicks in now */ 2984 pci_set_drvdata(pdev, dev); 2985 2986 /* We can do scatter/gather and HW checksum */ 2987 dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM; 2988 dev->features |= dev->hw_features | NETIF_F_RXCSUM; 2989 if (pci_using_dac) 2990 dev->features |= NETIF_F_HIGHDMA; 2991 2992 /* MTU range: 68 - 1500 (Jumbo mode is broken) */ 2993 dev->min_mtu = GEM_MIN_MTU; 2994 dev->max_mtu = GEM_MAX_MTU; 2995 2996 /* Register with kernel */ 2997 if (register_netdev(dev)) { 2998 pr_err("Cannot register net device, aborting\n"); 2999 err = -ENOMEM; 3000 goto err_out_free_consistent; 3001 } 3002 3003 /* Undo the get_cell with appropriate locking (we could use 3004 * ndo_init/uninit but that would be even more clumsy imho) 3005 */ 3006 rtnl_lock(); 3007 gem_put_cell(gp); 3008 rtnl_unlock(); 3009 3010 netdev_info(dev, "Sun GEM (PCI) 10/100/1000BaseT Ethernet %pM\n", 3011 dev->dev_addr); 3012 return 0; 3013 3014 err_out_free_consistent: 3015 gem_remove_one(pdev); 3016 err_out_iounmap: 3017 gem_put_cell(gp); 3018 iounmap(gp->regs); 3019 3020 err_out_free_res: 3021 pci_release_regions(pdev); 3022 3023 err_out_free_netdev: 3024 free_netdev(dev); 3025 err_disable_device: 3026 pci_disable_device(pdev); 3027 return err; 3028 3029 } 3030 3031 3032 static struct pci_driver gem_driver = { 3033 .name = GEM_MODULE_NAME, 3034 .id_table = gem_pci_tbl, 3035 .probe = gem_init_one, 3036 .remove = gem_remove_one, 3037 #ifdef CONFIG_PM 3038 .suspend = gem_suspend, 3039 .resume = gem_resume, 3040 #endif /* CONFIG_PM */ 3041 }; 3042 3043 module_pci_driver(gem_driver); 3044