1 /* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver. 2 * 3 * Copyright (C) 2002 David S. Miller (davem@redhat.com) 4 * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi) 5 * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) 6 * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org) 7 * Copyright (C) 2006 Broadcom Corporation. 8 * Copyright (C) 2007 Michael Buesch <m@bues.ch> 9 * Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de> 10 * 11 * Distribute under GPL. 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/moduleparam.h> 19 #include <linux/types.h> 20 #include <linux/netdevice.h> 21 #include <linux/ethtool.h> 22 #include <linux/mii.h> 23 #include <linux/if_ether.h> 24 #include <linux/if_vlan.h> 25 #include <linux/etherdevice.h> 26 #include <linux/pci.h> 27 #include <linux/delay.h> 28 #include <linux/init.h> 29 #include <linux/interrupt.h> 30 #include <linux/dma-mapping.h> 31 #include <linux/ssb/ssb.h> 32 #include <linux/slab.h> 33 #include <linux/phy.h> 34 35 #include <linux/uaccess.h> 36 #include <asm/io.h> 37 #include <asm/irq.h> 38 39 40 #include "b44.h" 41 42 #define DRV_MODULE_NAME "b44" 43 #define DRV_MODULE_VERSION "2.0" 44 #define DRV_DESCRIPTION "Broadcom 44xx/47xx 10/100 PCI ethernet driver" 45 46 #define B44_DEF_MSG_ENABLE \ 47 (NETIF_MSG_DRV | \ 48 NETIF_MSG_PROBE | \ 49 NETIF_MSG_LINK | \ 50 NETIF_MSG_TIMER | \ 51 NETIF_MSG_IFDOWN | \ 52 NETIF_MSG_IFUP | \ 53 NETIF_MSG_RX_ERR | \ 54 NETIF_MSG_TX_ERR) 55 56 /* length of time before we decide the hardware is borked, 57 * and dev->tx_timeout() should be called to fix the problem 58 */ 59 #define B44_TX_TIMEOUT (5 * HZ) 60 61 /* hardware minimum and maximum for a single frame's data payload */ 62 #define B44_MIN_MTU ETH_ZLEN 63 #define B44_MAX_MTU ETH_DATA_LEN 64 65 #define B44_RX_RING_SIZE 512 66 #define B44_DEF_RX_RING_PENDING 200 67 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \ 68 B44_RX_RING_SIZE) 69 #define B44_TX_RING_SIZE 512 70 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1) 71 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \ 72 B44_TX_RING_SIZE) 73 74 #define TX_RING_GAP(BP) \ 75 (B44_TX_RING_SIZE - (BP)->tx_pending) 76 #define TX_BUFFS_AVAIL(BP) \ 77 (((BP)->tx_cons <= (BP)->tx_prod) ? \ 78 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \ 79 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP)) 80 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1)) 81 82 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2) 83 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET) 84 85 /* minimum number of free TX descriptors required to wake up TX process */ 86 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4) 87 88 /* b44 internal pattern match filter info */ 89 #define B44_PATTERN_BASE 0x400 90 #define B44_PATTERN_SIZE 0x80 91 #define B44_PMASK_BASE 0x600 92 #define B44_PMASK_SIZE 0x10 93 #define B44_MAX_PATTERNS 16 94 #define B44_ETHIPV6UDP_HLEN 62 95 #define B44_ETHIPV4UDP_HLEN 42 96 97 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller"); 98 MODULE_DESCRIPTION(DRV_DESCRIPTION); 99 MODULE_LICENSE("GPL"); 100 MODULE_VERSION(DRV_MODULE_VERSION); 101 102 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */ 103 module_param(b44_debug, int, 0); 104 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value"); 105 106 107 #ifdef CONFIG_B44_PCI 108 static const struct pci_device_id b44_pci_tbl[] = { 109 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) }, 110 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) }, 111 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) }, 112 { 0 } /* terminate list with empty entry */ 113 }; 114 MODULE_DEVICE_TABLE(pci, b44_pci_tbl); 115 116 static struct pci_driver b44_pci_driver = { 117 .name = DRV_MODULE_NAME, 118 .id_table = b44_pci_tbl, 119 }; 120 #endif /* CONFIG_B44_PCI */ 121 122 static const struct ssb_device_id b44_ssb_tbl[] = { 123 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV), 124 {}, 125 }; 126 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl); 127 128 static void b44_halt(struct b44 *); 129 static void b44_init_rings(struct b44 *); 130 131 #define B44_FULL_RESET 1 132 #define B44_FULL_RESET_SKIP_PHY 2 133 #define B44_PARTIAL_RESET 3 134 #define B44_CHIP_RESET_FULL 4 135 #define B44_CHIP_RESET_PARTIAL 5 136 137 static void b44_init_hw(struct b44 *, int); 138 139 static int dma_desc_sync_size; 140 static int instance; 141 142 static const char b44_gstrings[][ETH_GSTRING_LEN] = { 143 #define _B44(x...) # x, 144 B44_STAT_REG_DECLARE 145 #undef _B44 146 }; 147 148 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev, 149 dma_addr_t dma_base, 150 unsigned long offset, 151 enum dma_data_direction dir) 152 { 153 dma_sync_single_for_device(sdev->dma_dev, dma_base + offset, 154 dma_desc_sync_size, dir); 155 } 156 157 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev, 158 dma_addr_t dma_base, 159 unsigned long offset, 160 enum dma_data_direction dir) 161 { 162 dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset, 163 dma_desc_sync_size, dir); 164 } 165 166 static inline unsigned long br32(const struct b44 *bp, unsigned long reg) 167 { 168 return ssb_read32(bp->sdev, reg); 169 } 170 171 static inline void bw32(const struct b44 *bp, 172 unsigned long reg, unsigned long val) 173 { 174 ssb_write32(bp->sdev, reg, val); 175 } 176 177 static int b44_wait_bit(struct b44 *bp, unsigned long reg, 178 u32 bit, unsigned long timeout, const int clear) 179 { 180 unsigned long i; 181 182 for (i = 0; i < timeout; i++) { 183 u32 val = br32(bp, reg); 184 185 if (clear && !(val & bit)) 186 break; 187 if (!clear && (val & bit)) 188 break; 189 udelay(10); 190 } 191 if (i == timeout) { 192 if (net_ratelimit()) 193 netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n", 194 bit, reg, clear ? "clear" : "set"); 195 196 return -ENODEV; 197 } 198 return 0; 199 } 200 201 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index) 202 { 203 u32 val; 204 205 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ | 206 (index << CAM_CTRL_INDEX_SHIFT))); 207 208 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1); 209 210 val = br32(bp, B44_CAM_DATA_LO); 211 212 data[2] = (val >> 24) & 0xFF; 213 data[3] = (val >> 16) & 0xFF; 214 data[4] = (val >> 8) & 0xFF; 215 data[5] = (val >> 0) & 0xFF; 216 217 val = br32(bp, B44_CAM_DATA_HI); 218 219 data[0] = (val >> 8) & 0xFF; 220 data[1] = (val >> 0) & 0xFF; 221 } 222 223 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index) 224 { 225 u32 val; 226 227 val = ((u32) data[2]) << 24; 228 val |= ((u32) data[3]) << 16; 229 val |= ((u32) data[4]) << 8; 230 val |= ((u32) data[5]) << 0; 231 bw32(bp, B44_CAM_DATA_LO, val); 232 val = (CAM_DATA_HI_VALID | 233 (((u32) data[0]) << 8) | 234 (((u32) data[1]) << 0)); 235 bw32(bp, B44_CAM_DATA_HI, val); 236 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE | 237 (index << CAM_CTRL_INDEX_SHIFT))); 238 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1); 239 } 240 241 static inline void __b44_disable_ints(struct b44 *bp) 242 { 243 bw32(bp, B44_IMASK, 0); 244 } 245 246 static void b44_disable_ints(struct b44 *bp) 247 { 248 __b44_disable_ints(bp); 249 250 /* Flush posted writes. */ 251 br32(bp, B44_IMASK); 252 } 253 254 static void b44_enable_ints(struct b44 *bp) 255 { 256 bw32(bp, B44_IMASK, bp->imask); 257 } 258 259 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val) 260 { 261 int err; 262 263 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII); 264 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | 265 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) | 266 (phy_addr << MDIO_DATA_PMD_SHIFT) | 267 (reg << MDIO_DATA_RA_SHIFT) | 268 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT))); 269 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0); 270 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA; 271 272 return err; 273 } 274 275 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val) 276 { 277 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII); 278 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | 279 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) | 280 (phy_addr << MDIO_DATA_PMD_SHIFT) | 281 (reg << MDIO_DATA_RA_SHIFT) | 282 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) | 283 (val & MDIO_DATA_DATA))); 284 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0); 285 } 286 287 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val) 288 { 289 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 290 return 0; 291 292 return __b44_readphy(bp, bp->phy_addr, reg, val); 293 } 294 295 static inline int b44_writephy(struct b44 *bp, int reg, u32 val) 296 { 297 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 298 return 0; 299 300 return __b44_writephy(bp, bp->phy_addr, reg, val); 301 } 302 303 /* miilib interface */ 304 static int b44_mdio_read_mii(struct net_device *dev, int phy_id, int location) 305 { 306 u32 val; 307 struct b44 *bp = netdev_priv(dev); 308 int rc = __b44_readphy(bp, phy_id, location, &val); 309 if (rc) 310 return 0xffffffff; 311 return val; 312 } 313 314 static void b44_mdio_write_mii(struct net_device *dev, int phy_id, int location, 315 int val) 316 { 317 struct b44 *bp = netdev_priv(dev); 318 __b44_writephy(bp, phy_id, location, val); 319 } 320 321 static int b44_mdio_read_phylib(struct mii_bus *bus, int phy_id, int location) 322 { 323 u32 val; 324 struct b44 *bp = bus->priv; 325 int rc = __b44_readphy(bp, phy_id, location, &val); 326 if (rc) 327 return 0xffffffff; 328 return val; 329 } 330 331 static int b44_mdio_write_phylib(struct mii_bus *bus, int phy_id, int location, 332 u16 val) 333 { 334 struct b44 *bp = bus->priv; 335 return __b44_writephy(bp, phy_id, location, val); 336 } 337 338 static int b44_phy_reset(struct b44 *bp) 339 { 340 u32 val; 341 int err; 342 343 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 344 return 0; 345 err = b44_writephy(bp, MII_BMCR, BMCR_RESET); 346 if (err) 347 return err; 348 udelay(100); 349 err = b44_readphy(bp, MII_BMCR, &val); 350 if (!err) { 351 if (val & BMCR_RESET) { 352 netdev_err(bp->dev, "PHY Reset would not complete\n"); 353 err = -ENODEV; 354 } 355 } 356 357 return err; 358 } 359 360 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags) 361 { 362 u32 val; 363 364 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE); 365 bp->flags |= pause_flags; 366 367 val = br32(bp, B44_RXCONFIG); 368 if (pause_flags & B44_FLAG_RX_PAUSE) 369 val |= RXCONFIG_FLOW; 370 else 371 val &= ~RXCONFIG_FLOW; 372 bw32(bp, B44_RXCONFIG, val); 373 374 val = br32(bp, B44_MAC_FLOW); 375 if (pause_flags & B44_FLAG_TX_PAUSE) 376 val |= (MAC_FLOW_PAUSE_ENAB | 377 (0xc0 & MAC_FLOW_RX_HI_WATER)); 378 else 379 val &= ~MAC_FLOW_PAUSE_ENAB; 380 bw32(bp, B44_MAC_FLOW, val); 381 } 382 383 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote) 384 { 385 u32 pause_enab = 0; 386 387 /* The driver supports only rx pause by default because 388 the b44 mac tx pause mechanism generates excessive 389 pause frames. 390 Use ethtool to turn on b44 tx pause if necessary. 391 */ 392 if ((local & ADVERTISE_PAUSE_CAP) && 393 (local & ADVERTISE_PAUSE_ASYM)){ 394 if ((remote & LPA_PAUSE_ASYM) && 395 !(remote & LPA_PAUSE_CAP)) 396 pause_enab |= B44_FLAG_RX_PAUSE; 397 } 398 399 __b44_set_flow_ctrl(bp, pause_enab); 400 } 401 402 #ifdef CONFIG_BCM47XX 403 #include <linux/bcm47xx_nvram.h> 404 static void b44_wap54g10_workaround(struct b44 *bp) 405 { 406 char buf[20]; 407 u32 val; 408 int err; 409 410 /* 411 * workaround for bad hardware design in Linksys WAP54G v1.0 412 * see https://dev.openwrt.org/ticket/146 413 * check and reset bit "isolate" 414 */ 415 if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0) 416 return; 417 if (simple_strtoul(buf, NULL, 0) == 2) { 418 err = __b44_readphy(bp, 0, MII_BMCR, &val); 419 if (err) 420 goto error; 421 if (!(val & BMCR_ISOLATE)) 422 return; 423 val &= ~BMCR_ISOLATE; 424 err = __b44_writephy(bp, 0, MII_BMCR, val); 425 if (err) 426 goto error; 427 } 428 return; 429 error: 430 pr_warn("PHY: cannot reset MII transceiver isolate bit\n"); 431 } 432 #else 433 static inline void b44_wap54g10_workaround(struct b44 *bp) 434 { 435 } 436 #endif 437 438 static int b44_setup_phy(struct b44 *bp) 439 { 440 u32 val; 441 int err; 442 443 b44_wap54g10_workaround(bp); 444 445 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 446 return 0; 447 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0) 448 goto out; 449 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL, 450 val & MII_ALEDCTRL_ALLMSK)) != 0) 451 goto out; 452 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0) 453 goto out; 454 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL, 455 val | MII_TLEDCTRL_ENABLE)) != 0) 456 goto out; 457 458 if (!(bp->flags & B44_FLAG_FORCE_LINK)) { 459 u32 adv = ADVERTISE_CSMA; 460 461 if (bp->flags & B44_FLAG_ADV_10HALF) 462 adv |= ADVERTISE_10HALF; 463 if (bp->flags & B44_FLAG_ADV_10FULL) 464 adv |= ADVERTISE_10FULL; 465 if (bp->flags & B44_FLAG_ADV_100HALF) 466 adv |= ADVERTISE_100HALF; 467 if (bp->flags & B44_FLAG_ADV_100FULL) 468 adv |= ADVERTISE_100FULL; 469 470 if (bp->flags & B44_FLAG_PAUSE_AUTO) 471 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; 472 473 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0) 474 goto out; 475 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE | 476 BMCR_ANRESTART))) != 0) 477 goto out; 478 } else { 479 u32 bmcr; 480 481 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0) 482 goto out; 483 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100); 484 if (bp->flags & B44_FLAG_100_BASE_T) 485 bmcr |= BMCR_SPEED100; 486 if (bp->flags & B44_FLAG_FULL_DUPLEX) 487 bmcr |= BMCR_FULLDPLX; 488 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0) 489 goto out; 490 491 /* Since we will not be negotiating there is no safe way 492 * to determine if the link partner supports flow control 493 * or not. So just disable it completely in this case. 494 */ 495 b44_set_flow_ctrl(bp, 0, 0); 496 } 497 498 out: 499 return err; 500 } 501 502 static void b44_stats_update(struct b44 *bp) 503 { 504 unsigned long reg; 505 u64 *val; 506 507 val = &bp->hw_stats.tx_good_octets; 508 u64_stats_update_begin(&bp->hw_stats.syncp); 509 510 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) { 511 *val++ += br32(bp, reg); 512 } 513 514 /* Pad */ 515 reg += 8*4UL; 516 517 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) { 518 *val++ += br32(bp, reg); 519 } 520 521 u64_stats_update_end(&bp->hw_stats.syncp); 522 } 523 524 static void b44_link_report(struct b44 *bp) 525 { 526 if (!netif_carrier_ok(bp->dev)) { 527 netdev_info(bp->dev, "Link is down\n"); 528 } else { 529 netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n", 530 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10, 531 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half"); 532 533 netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n", 534 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off", 535 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off"); 536 } 537 } 538 539 static void b44_check_phy(struct b44 *bp) 540 { 541 u32 bmsr, aux; 542 543 if (bp->flags & B44_FLAG_EXTERNAL_PHY) { 544 bp->flags |= B44_FLAG_100_BASE_T; 545 if (!netif_carrier_ok(bp->dev)) { 546 u32 val = br32(bp, B44_TX_CTRL); 547 if (bp->flags & B44_FLAG_FULL_DUPLEX) 548 val |= TX_CTRL_DUPLEX; 549 else 550 val &= ~TX_CTRL_DUPLEX; 551 bw32(bp, B44_TX_CTRL, val); 552 netif_carrier_on(bp->dev); 553 b44_link_report(bp); 554 } 555 return; 556 } 557 558 if (!b44_readphy(bp, MII_BMSR, &bmsr) && 559 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) && 560 (bmsr != 0xffff)) { 561 if (aux & MII_AUXCTRL_SPEED) 562 bp->flags |= B44_FLAG_100_BASE_T; 563 else 564 bp->flags &= ~B44_FLAG_100_BASE_T; 565 if (aux & MII_AUXCTRL_DUPLEX) 566 bp->flags |= B44_FLAG_FULL_DUPLEX; 567 else 568 bp->flags &= ~B44_FLAG_FULL_DUPLEX; 569 570 if (!netif_carrier_ok(bp->dev) && 571 (bmsr & BMSR_LSTATUS)) { 572 u32 val = br32(bp, B44_TX_CTRL); 573 u32 local_adv, remote_adv; 574 575 if (bp->flags & B44_FLAG_FULL_DUPLEX) 576 val |= TX_CTRL_DUPLEX; 577 else 578 val &= ~TX_CTRL_DUPLEX; 579 bw32(bp, B44_TX_CTRL, val); 580 581 if (!(bp->flags & B44_FLAG_FORCE_LINK) && 582 !b44_readphy(bp, MII_ADVERTISE, &local_adv) && 583 !b44_readphy(bp, MII_LPA, &remote_adv)) 584 b44_set_flow_ctrl(bp, local_adv, remote_adv); 585 586 /* Link now up */ 587 netif_carrier_on(bp->dev); 588 b44_link_report(bp); 589 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) { 590 /* Link now down */ 591 netif_carrier_off(bp->dev); 592 b44_link_report(bp); 593 } 594 595 if (bmsr & BMSR_RFAULT) 596 netdev_warn(bp->dev, "Remote fault detected in PHY\n"); 597 if (bmsr & BMSR_JCD) 598 netdev_warn(bp->dev, "Jabber detected in PHY\n"); 599 } 600 } 601 602 static void b44_timer(unsigned long __opaque) 603 { 604 struct b44 *bp = (struct b44 *) __opaque; 605 606 spin_lock_irq(&bp->lock); 607 608 b44_check_phy(bp); 609 610 b44_stats_update(bp); 611 612 spin_unlock_irq(&bp->lock); 613 614 mod_timer(&bp->timer, round_jiffies(jiffies + HZ)); 615 } 616 617 static void b44_tx(struct b44 *bp) 618 { 619 u32 cur, cons; 620 unsigned bytes_compl = 0, pkts_compl = 0; 621 622 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK; 623 cur /= sizeof(struct dma_desc); 624 625 /* XXX needs updating when NETIF_F_SG is supported */ 626 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) { 627 struct ring_info *rp = &bp->tx_buffers[cons]; 628 struct sk_buff *skb = rp->skb; 629 630 BUG_ON(skb == NULL); 631 632 dma_unmap_single(bp->sdev->dma_dev, 633 rp->mapping, 634 skb->len, 635 DMA_TO_DEVICE); 636 rp->skb = NULL; 637 638 bytes_compl += skb->len; 639 pkts_compl++; 640 641 dev_kfree_skb_irq(skb); 642 } 643 644 netdev_completed_queue(bp->dev, pkts_compl, bytes_compl); 645 bp->tx_cons = cons; 646 if (netif_queue_stopped(bp->dev) && 647 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH) 648 netif_wake_queue(bp->dev); 649 650 bw32(bp, B44_GPTIMER, 0); 651 } 652 653 /* Works like this. This chip writes a 'struct rx_header" 30 bytes 654 * before the DMA address you give it. So we allocate 30 more bytes 655 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then 656 * point the chip at 30 bytes past where the rx_header will go. 657 */ 658 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) 659 { 660 struct dma_desc *dp; 661 struct ring_info *src_map, *map; 662 struct rx_header *rh; 663 struct sk_buff *skb; 664 dma_addr_t mapping; 665 int dest_idx; 666 u32 ctrl; 667 668 src_map = NULL; 669 if (src_idx >= 0) 670 src_map = &bp->rx_buffers[src_idx]; 671 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1); 672 map = &bp->rx_buffers[dest_idx]; 673 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ); 674 if (skb == NULL) 675 return -ENOMEM; 676 677 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, 678 RX_PKT_BUF_SZ, 679 DMA_FROM_DEVICE); 680 681 /* Hardware bug work-around, the chip is unable to do PCI DMA 682 to/from anything above 1GB :-( */ 683 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || 684 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) { 685 /* Sigh... */ 686 if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) 687 dma_unmap_single(bp->sdev->dma_dev, mapping, 688 RX_PKT_BUF_SZ, DMA_FROM_DEVICE); 689 dev_kfree_skb_any(skb); 690 skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA); 691 if (skb == NULL) 692 return -ENOMEM; 693 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, 694 RX_PKT_BUF_SZ, 695 DMA_FROM_DEVICE); 696 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || 697 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) { 698 if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) 699 dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE); 700 dev_kfree_skb_any(skb); 701 return -ENOMEM; 702 } 703 bp->force_copybreak = 1; 704 } 705 706 rh = (struct rx_header *) skb->data; 707 708 rh->len = 0; 709 rh->flags = 0; 710 711 map->skb = skb; 712 map->mapping = mapping; 713 714 if (src_map != NULL) 715 src_map->skb = NULL; 716 717 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ); 718 if (dest_idx == (B44_RX_RING_SIZE - 1)) 719 ctrl |= DESC_CTRL_EOT; 720 721 dp = &bp->rx_ring[dest_idx]; 722 dp->ctrl = cpu_to_le32(ctrl); 723 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset); 724 725 if (bp->flags & B44_FLAG_RX_RING_HACK) 726 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma, 727 dest_idx * sizeof(*dp), 728 DMA_BIDIRECTIONAL); 729 730 return RX_PKT_BUF_SZ; 731 } 732 733 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) 734 { 735 struct dma_desc *src_desc, *dest_desc; 736 struct ring_info *src_map, *dest_map; 737 struct rx_header *rh; 738 int dest_idx; 739 __le32 ctrl; 740 741 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1); 742 dest_desc = &bp->rx_ring[dest_idx]; 743 dest_map = &bp->rx_buffers[dest_idx]; 744 src_desc = &bp->rx_ring[src_idx]; 745 src_map = &bp->rx_buffers[src_idx]; 746 747 dest_map->skb = src_map->skb; 748 rh = (struct rx_header *) src_map->skb->data; 749 rh->len = 0; 750 rh->flags = 0; 751 dest_map->mapping = src_map->mapping; 752 753 if (bp->flags & B44_FLAG_RX_RING_HACK) 754 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma, 755 src_idx * sizeof(*src_desc), 756 DMA_BIDIRECTIONAL); 757 758 ctrl = src_desc->ctrl; 759 if (dest_idx == (B44_RX_RING_SIZE - 1)) 760 ctrl |= cpu_to_le32(DESC_CTRL_EOT); 761 else 762 ctrl &= cpu_to_le32(~DESC_CTRL_EOT); 763 764 dest_desc->ctrl = ctrl; 765 dest_desc->addr = src_desc->addr; 766 767 src_map->skb = NULL; 768 769 if (bp->flags & B44_FLAG_RX_RING_HACK) 770 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma, 771 dest_idx * sizeof(*dest_desc), 772 DMA_BIDIRECTIONAL); 773 774 dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping, 775 RX_PKT_BUF_SZ, 776 DMA_FROM_DEVICE); 777 } 778 779 static int b44_rx(struct b44 *bp, int budget) 780 { 781 int received; 782 u32 cons, prod; 783 784 received = 0; 785 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK; 786 prod /= sizeof(struct dma_desc); 787 cons = bp->rx_cons; 788 789 while (cons != prod && budget > 0) { 790 struct ring_info *rp = &bp->rx_buffers[cons]; 791 struct sk_buff *skb = rp->skb; 792 dma_addr_t map = rp->mapping; 793 struct rx_header *rh; 794 u16 len; 795 796 dma_sync_single_for_cpu(bp->sdev->dma_dev, map, 797 RX_PKT_BUF_SZ, 798 DMA_FROM_DEVICE); 799 rh = (struct rx_header *) skb->data; 800 len = le16_to_cpu(rh->len); 801 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) || 802 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) { 803 drop_it: 804 b44_recycle_rx(bp, cons, bp->rx_prod); 805 drop_it_no_recycle: 806 bp->dev->stats.rx_dropped++; 807 goto next_pkt; 808 } 809 810 if (len == 0) { 811 int i = 0; 812 813 do { 814 udelay(2); 815 barrier(); 816 len = le16_to_cpu(rh->len); 817 } while (len == 0 && i++ < 5); 818 if (len == 0) 819 goto drop_it; 820 } 821 822 /* Omit CRC. */ 823 len -= 4; 824 825 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) { 826 int skb_size; 827 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod); 828 if (skb_size < 0) 829 goto drop_it; 830 dma_unmap_single(bp->sdev->dma_dev, map, 831 skb_size, DMA_FROM_DEVICE); 832 /* Leave out rx_header */ 833 skb_put(skb, len + RX_PKT_OFFSET); 834 skb_pull(skb, RX_PKT_OFFSET); 835 } else { 836 struct sk_buff *copy_skb; 837 838 b44_recycle_rx(bp, cons, bp->rx_prod); 839 copy_skb = napi_alloc_skb(&bp->napi, len); 840 if (copy_skb == NULL) 841 goto drop_it_no_recycle; 842 843 skb_put(copy_skb, len); 844 /* DMA sync done above, copy just the actual packet */ 845 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET, 846 copy_skb->data, len); 847 skb = copy_skb; 848 } 849 skb_checksum_none_assert(skb); 850 skb->protocol = eth_type_trans(skb, bp->dev); 851 netif_receive_skb(skb); 852 received++; 853 budget--; 854 next_pkt: 855 bp->rx_prod = (bp->rx_prod + 1) & 856 (B44_RX_RING_SIZE - 1); 857 cons = (cons + 1) & (B44_RX_RING_SIZE - 1); 858 } 859 860 bp->rx_cons = cons; 861 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc)); 862 863 return received; 864 } 865 866 static int b44_poll(struct napi_struct *napi, int budget) 867 { 868 struct b44 *bp = container_of(napi, struct b44, napi); 869 int work_done; 870 unsigned long flags; 871 872 spin_lock_irqsave(&bp->lock, flags); 873 874 if (bp->istat & (ISTAT_TX | ISTAT_TO)) { 875 /* spin_lock(&bp->tx_lock); */ 876 b44_tx(bp); 877 /* spin_unlock(&bp->tx_lock); */ 878 } 879 if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */ 880 bp->istat &= ~ISTAT_RFO; 881 b44_disable_ints(bp); 882 ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */ 883 b44_init_rings(bp); 884 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY); 885 netif_wake_queue(bp->dev); 886 } 887 888 spin_unlock_irqrestore(&bp->lock, flags); 889 890 work_done = 0; 891 if (bp->istat & ISTAT_RX) 892 work_done += b44_rx(bp, budget); 893 894 if (bp->istat & ISTAT_ERRORS) { 895 spin_lock_irqsave(&bp->lock, flags); 896 b44_halt(bp); 897 b44_init_rings(bp); 898 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY); 899 netif_wake_queue(bp->dev); 900 spin_unlock_irqrestore(&bp->lock, flags); 901 work_done = 0; 902 } 903 904 if (work_done < budget) { 905 napi_complete_done(napi, work_done); 906 b44_enable_ints(bp); 907 } 908 909 return work_done; 910 } 911 912 static irqreturn_t b44_interrupt(int irq, void *dev_id) 913 { 914 struct net_device *dev = dev_id; 915 struct b44 *bp = netdev_priv(dev); 916 u32 istat, imask; 917 int handled = 0; 918 919 spin_lock(&bp->lock); 920 921 istat = br32(bp, B44_ISTAT); 922 imask = br32(bp, B44_IMASK); 923 924 /* The interrupt mask register controls which interrupt bits 925 * will actually raise an interrupt to the CPU when set by hw/firmware, 926 * but doesn't mask off the bits. 927 */ 928 istat &= imask; 929 if (istat) { 930 handled = 1; 931 932 if (unlikely(!netif_running(dev))) { 933 netdev_info(dev, "late interrupt\n"); 934 goto irq_ack; 935 } 936 937 if (napi_schedule_prep(&bp->napi)) { 938 /* NOTE: These writes are posted by the readback of 939 * the ISTAT register below. 940 */ 941 bp->istat = istat; 942 __b44_disable_ints(bp); 943 __napi_schedule(&bp->napi); 944 } 945 946 irq_ack: 947 bw32(bp, B44_ISTAT, istat); 948 br32(bp, B44_ISTAT); 949 } 950 spin_unlock(&bp->lock); 951 return IRQ_RETVAL(handled); 952 } 953 954 static void b44_tx_timeout(struct net_device *dev) 955 { 956 struct b44 *bp = netdev_priv(dev); 957 958 netdev_err(dev, "transmit timed out, resetting\n"); 959 960 spin_lock_irq(&bp->lock); 961 962 b44_halt(bp); 963 b44_init_rings(bp); 964 b44_init_hw(bp, B44_FULL_RESET); 965 966 spin_unlock_irq(&bp->lock); 967 968 b44_enable_ints(bp); 969 970 netif_wake_queue(dev); 971 } 972 973 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev) 974 { 975 struct b44 *bp = netdev_priv(dev); 976 int rc = NETDEV_TX_OK; 977 dma_addr_t mapping; 978 u32 len, entry, ctrl; 979 unsigned long flags; 980 981 len = skb->len; 982 spin_lock_irqsave(&bp->lock, flags); 983 984 /* This is a hard error, log it. */ 985 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) { 986 netif_stop_queue(dev); 987 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); 988 goto err_out; 989 } 990 991 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE); 992 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) { 993 struct sk_buff *bounce_skb; 994 995 /* Chip can't handle DMA to/from >1GB, use bounce buffer */ 996 if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) 997 dma_unmap_single(bp->sdev->dma_dev, mapping, len, 998 DMA_TO_DEVICE); 999 1000 bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA); 1001 if (!bounce_skb) 1002 goto err_out; 1003 1004 mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data, 1005 len, DMA_TO_DEVICE); 1006 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) { 1007 if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) 1008 dma_unmap_single(bp->sdev->dma_dev, mapping, 1009 len, DMA_TO_DEVICE); 1010 dev_kfree_skb_any(bounce_skb); 1011 goto err_out; 1012 } 1013 1014 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len); 1015 dev_kfree_skb_any(skb); 1016 skb = bounce_skb; 1017 } 1018 1019 entry = bp->tx_prod; 1020 bp->tx_buffers[entry].skb = skb; 1021 bp->tx_buffers[entry].mapping = mapping; 1022 1023 ctrl = (len & DESC_CTRL_LEN); 1024 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF; 1025 if (entry == (B44_TX_RING_SIZE - 1)) 1026 ctrl |= DESC_CTRL_EOT; 1027 1028 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl); 1029 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset); 1030 1031 if (bp->flags & B44_FLAG_TX_RING_HACK) 1032 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma, 1033 entry * sizeof(bp->tx_ring[0]), 1034 DMA_TO_DEVICE); 1035 1036 entry = NEXT_TX(entry); 1037 1038 bp->tx_prod = entry; 1039 1040 wmb(); 1041 1042 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc)); 1043 if (bp->flags & B44_FLAG_BUGGY_TXPTR) 1044 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc)); 1045 if (bp->flags & B44_FLAG_REORDER_BUG) 1046 br32(bp, B44_DMATX_PTR); 1047 1048 netdev_sent_queue(dev, skb->len); 1049 1050 if (TX_BUFFS_AVAIL(bp) < 1) 1051 netif_stop_queue(dev); 1052 1053 out_unlock: 1054 spin_unlock_irqrestore(&bp->lock, flags); 1055 1056 return rc; 1057 1058 err_out: 1059 rc = NETDEV_TX_BUSY; 1060 goto out_unlock; 1061 } 1062 1063 static int b44_change_mtu(struct net_device *dev, int new_mtu) 1064 { 1065 struct b44 *bp = netdev_priv(dev); 1066 1067 if (!netif_running(dev)) { 1068 /* We'll just catch it later when the 1069 * device is up'd. 1070 */ 1071 dev->mtu = new_mtu; 1072 return 0; 1073 } 1074 1075 spin_lock_irq(&bp->lock); 1076 b44_halt(bp); 1077 dev->mtu = new_mtu; 1078 b44_init_rings(bp); 1079 b44_init_hw(bp, B44_FULL_RESET); 1080 spin_unlock_irq(&bp->lock); 1081 1082 b44_enable_ints(bp); 1083 1084 return 0; 1085 } 1086 1087 /* Free up pending packets in all rx/tx rings. 1088 * 1089 * The chip has been shut down and the driver detached from 1090 * the networking, so no interrupts or new tx packets will 1091 * end up in the driver. bp->lock is not held and we are not 1092 * in an interrupt context and thus may sleep. 1093 */ 1094 static void b44_free_rings(struct b44 *bp) 1095 { 1096 struct ring_info *rp; 1097 int i; 1098 1099 for (i = 0; i < B44_RX_RING_SIZE; i++) { 1100 rp = &bp->rx_buffers[i]; 1101 1102 if (rp->skb == NULL) 1103 continue; 1104 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ, 1105 DMA_FROM_DEVICE); 1106 dev_kfree_skb_any(rp->skb); 1107 rp->skb = NULL; 1108 } 1109 1110 /* XXX needs changes once NETIF_F_SG is set... */ 1111 for (i = 0; i < B44_TX_RING_SIZE; i++) { 1112 rp = &bp->tx_buffers[i]; 1113 1114 if (rp->skb == NULL) 1115 continue; 1116 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len, 1117 DMA_TO_DEVICE); 1118 dev_kfree_skb_any(rp->skb); 1119 rp->skb = NULL; 1120 } 1121 } 1122 1123 /* Initialize tx/rx rings for packet processing. 1124 * 1125 * The chip has been shut down and the driver detached from 1126 * the networking, so no interrupts or new tx packets will 1127 * end up in the driver. 1128 */ 1129 static void b44_init_rings(struct b44 *bp) 1130 { 1131 int i; 1132 1133 b44_free_rings(bp); 1134 1135 memset(bp->rx_ring, 0, B44_RX_RING_BYTES); 1136 memset(bp->tx_ring, 0, B44_TX_RING_BYTES); 1137 1138 if (bp->flags & B44_FLAG_RX_RING_HACK) 1139 dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma, 1140 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL); 1141 1142 if (bp->flags & B44_FLAG_TX_RING_HACK) 1143 dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma, 1144 DMA_TABLE_BYTES, DMA_TO_DEVICE); 1145 1146 for (i = 0; i < bp->rx_pending; i++) { 1147 if (b44_alloc_rx_skb(bp, -1, i) < 0) 1148 break; 1149 } 1150 } 1151 1152 /* 1153 * Must not be invoked with interrupt sources disabled and 1154 * the hardware shutdown down. 1155 */ 1156 static void b44_free_consistent(struct b44 *bp) 1157 { 1158 kfree(bp->rx_buffers); 1159 bp->rx_buffers = NULL; 1160 kfree(bp->tx_buffers); 1161 bp->tx_buffers = NULL; 1162 if (bp->rx_ring) { 1163 if (bp->flags & B44_FLAG_RX_RING_HACK) { 1164 dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma, 1165 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL); 1166 kfree(bp->rx_ring); 1167 } else 1168 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES, 1169 bp->rx_ring, bp->rx_ring_dma); 1170 bp->rx_ring = NULL; 1171 bp->flags &= ~B44_FLAG_RX_RING_HACK; 1172 } 1173 if (bp->tx_ring) { 1174 if (bp->flags & B44_FLAG_TX_RING_HACK) { 1175 dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma, 1176 DMA_TABLE_BYTES, DMA_TO_DEVICE); 1177 kfree(bp->tx_ring); 1178 } else 1179 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES, 1180 bp->tx_ring, bp->tx_ring_dma); 1181 bp->tx_ring = NULL; 1182 bp->flags &= ~B44_FLAG_TX_RING_HACK; 1183 } 1184 } 1185 1186 /* 1187 * Must not be invoked with interrupt sources disabled and 1188 * the hardware shutdown down. Can sleep. 1189 */ 1190 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp) 1191 { 1192 int size; 1193 1194 size = B44_RX_RING_SIZE * sizeof(struct ring_info); 1195 bp->rx_buffers = kzalloc(size, gfp); 1196 if (!bp->rx_buffers) 1197 goto out_err; 1198 1199 size = B44_TX_RING_SIZE * sizeof(struct ring_info); 1200 bp->tx_buffers = kzalloc(size, gfp); 1201 if (!bp->tx_buffers) 1202 goto out_err; 1203 1204 size = DMA_TABLE_BYTES; 1205 bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, 1206 &bp->rx_ring_dma, gfp); 1207 if (!bp->rx_ring) { 1208 /* Allocation may have failed due to pci_alloc_consistent 1209 insisting on use of GFP_DMA, which is more restrictive 1210 than necessary... */ 1211 struct dma_desc *rx_ring; 1212 dma_addr_t rx_ring_dma; 1213 1214 rx_ring = kzalloc(size, gfp); 1215 if (!rx_ring) 1216 goto out_err; 1217 1218 rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring, 1219 DMA_TABLE_BYTES, 1220 DMA_BIDIRECTIONAL); 1221 1222 if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) || 1223 rx_ring_dma + size > DMA_BIT_MASK(30)) { 1224 kfree(rx_ring); 1225 goto out_err; 1226 } 1227 1228 bp->rx_ring = rx_ring; 1229 bp->rx_ring_dma = rx_ring_dma; 1230 bp->flags |= B44_FLAG_RX_RING_HACK; 1231 } 1232 1233 bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size, 1234 &bp->tx_ring_dma, gfp); 1235 if (!bp->tx_ring) { 1236 /* Allocation may have failed due to ssb_dma_alloc_consistent 1237 insisting on use of GFP_DMA, which is more restrictive 1238 than necessary... */ 1239 struct dma_desc *tx_ring; 1240 dma_addr_t tx_ring_dma; 1241 1242 tx_ring = kzalloc(size, gfp); 1243 if (!tx_ring) 1244 goto out_err; 1245 1246 tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring, 1247 DMA_TABLE_BYTES, 1248 DMA_TO_DEVICE); 1249 1250 if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) || 1251 tx_ring_dma + size > DMA_BIT_MASK(30)) { 1252 kfree(tx_ring); 1253 goto out_err; 1254 } 1255 1256 bp->tx_ring = tx_ring; 1257 bp->tx_ring_dma = tx_ring_dma; 1258 bp->flags |= B44_FLAG_TX_RING_HACK; 1259 } 1260 1261 return 0; 1262 1263 out_err: 1264 b44_free_consistent(bp); 1265 return -ENOMEM; 1266 } 1267 1268 /* bp->lock is held. */ 1269 static void b44_clear_stats(struct b44 *bp) 1270 { 1271 unsigned long reg; 1272 1273 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ); 1274 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) 1275 br32(bp, reg); 1276 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) 1277 br32(bp, reg); 1278 } 1279 1280 /* bp->lock is held. */ 1281 static void b44_chip_reset(struct b44 *bp, int reset_kind) 1282 { 1283 struct ssb_device *sdev = bp->sdev; 1284 bool was_enabled; 1285 1286 was_enabled = ssb_device_is_enabled(bp->sdev); 1287 1288 ssb_device_enable(bp->sdev, 0); 1289 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev); 1290 1291 if (was_enabled) { 1292 bw32(bp, B44_RCV_LAZY, 0); 1293 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE); 1294 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1); 1295 bw32(bp, B44_DMATX_CTRL, 0); 1296 bp->tx_prod = bp->tx_cons = 0; 1297 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) { 1298 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE, 1299 100, 0); 1300 } 1301 bw32(bp, B44_DMARX_CTRL, 0); 1302 bp->rx_prod = bp->rx_cons = 0; 1303 } 1304 1305 b44_clear_stats(bp); 1306 1307 /* 1308 * Don't enable PHY if we are doing a partial reset 1309 * we are probably going to power down 1310 */ 1311 if (reset_kind == B44_CHIP_RESET_PARTIAL) 1312 return; 1313 1314 switch (sdev->bus->bustype) { 1315 case SSB_BUSTYPE_SSB: 1316 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE | 1317 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus), 1318 B44_MDC_RATIO) 1319 & MDIO_CTRL_MAXF_MASK))); 1320 break; 1321 case SSB_BUSTYPE_PCI: 1322 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE | 1323 (0x0d & MDIO_CTRL_MAXF_MASK))); 1324 break; 1325 case SSB_BUSTYPE_PCMCIA: 1326 case SSB_BUSTYPE_SDIO: 1327 WARN_ON(1); /* A device with this bus does not exist. */ 1328 break; 1329 } 1330 1331 br32(bp, B44_MDIO_CTRL); 1332 1333 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) { 1334 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL); 1335 br32(bp, B44_ENET_CTRL); 1336 bp->flags |= B44_FLAG_EXTERNAL_PHY; 1337 } else { 1338 u32 val = br32(bp, B44_DEVCTRL); 1339 1340 if (val & DEVCTRL_EPR) { 1341 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR)); 1342 br32(bp, B44_DEVCTRL); 1343 udelay(100); 1344 } 1345 bp->flags &= ~B44_FLAG_EXTERNAL_PHY; 1346 } 1347 } 1348 1349 /* bp->lock is held. */ 1350 static void b44_halt(struct b44 *bp) 1351 { 1352 b44_disable_ints(bp); 1353 /* reset PHY */ 1354 b44_phy_reset(bp); 1355 /* power down PHY */ 1356 netdev_info(bp->dev, "powering down PHY\n"); 1357 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN); 1358 /* now reset the chip, but without enabling the MAC&PHY 1359 * part of it. This has to be done _after_ we shut down the PHY */ 1360 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 1361 b44_chip_reset(bp, B44_CHIP_RESET_FULL); 1362 else 1363 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL); 1364 } 1365 1366 /* bp->lock is held. */ 1367 static void __b44_set_mac_addr(struct b44 *bp) 1368 { 1369 bw32(bp, B44_CAM_CTRL, 0); 1370 if (!(bp->dev->flags & IFF_PROMISC)) { 1371 u32 val; 1372 1373 __b44_cam_write(bp, bp->dev->dev_addr, 0); 1374 val = br32(bp, B44_CAM_CTRL); 1375 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE); 1376 } 1377 } 1378 1379 static int b44_set_mac_addr(struct net_device *dev, void *p) 1380 { 1381 struct b44 *bp = netdev_priv(dev); 1382 struct sockaddr *addr = p; 1383 u32 val; 1384 1385 if (netif_running(dev)) 1386 return -EBUSY; 1387 1388 if (!is_valid_ether_addr(addr->sa_data)) 1389 return -EINVAL; 1390 1391 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1392 1393 spin_lock_irq(&bp->lock); 1394 1395 val = br32(bp, B44_RXCONFIG); 1396 if (!(val & RXCONFIG_CAM_ABSENT)) 1397 __b44_set_mac_addr(bp); 1398 1399 spin_unlock_irq(&bp->lock); 1400 1401 return 0; 1402 } 1403 1404 /* Called at device open time to get the chip ready for 1405 * packet processing. Invoked with bp->lock held. 1406 */ 1407 static void __b44_set_rx_mode(struct net_device *); 1408 static void b44_init_hw(struct b44 *bp, int reset_kind) 1409 { 1410 u32 val; 1411 1412 b44_chip_reset(bp, B44_CHIP_RESET_FULL); 1413 if (reset_kind == B44_FULL_RESET) { 1414 b44_phy_reset(bp); 1415 b44_setup_phy(bp); 1416 } 1417 1418 /* Enable CRC32, set proper LED modes and power on PHY */ 1419 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL); 1420 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT)); 1421 1422 /* This sets the MAC address too. */ 1423 __b44_set_rx_mode(bp->dev); 1424 1425 /* MTU + eth header + possible VLAN tag + struct rx_header */ 1426 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN); 1427 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN); 1428 1429 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */ 1430 if (reset_kind == B44_PARTIAL_RESET) { 1431 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE | 1432 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT))); 1433 } else { 1434 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE); 1435 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset); 1436 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE | 1437 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT))); 1438 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset); 1439 1440 bw32(bp, B44_DMARX_PTR, bp->rx_pending); 1441 bp->rx_prod = bp->rx_pending; 1442 1443 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ); 1444 } 1445 1446 val = br32(bp, B44_ENET_CTRL); 1447 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE)); 1448 1449 netdev_reset_queue(bp->dev); 1450 } 1451 1452 static int b44_open(struct net_device *dev) 1453 { 1454 struct b44 *bp = netdev_priv(dev); 1455 int err; 1456 1457 err = b44_alloc_consistent(bp, GFP_KERNEL); 1458 if (err) 1459 goto out; 1460 1461 napi_enable(&bp->napi); 1462 1463 b44_init_rings(bp); 1464 b44_init_hw(bp, B44_FULL_RESET); 1465 1466 b44_check_phy(bp); 1467 1468 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev); 1469 if (unlikely(err < 0)) { 1470 napi_disable(&bp->napi); 1471 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL); 1472 b44_free_rings(bp); 1473 b44_free_consistent(bp); 1474 goto out; 1475 } 1476 1477 init_timer(&bp->timer); 1478 bp->timer.expires = jiffies + HZ; 1479 bp->timer.data = (unsigned long) bp; 1480 bp->timer.function = b44_timer; 1481 add_timer(&bp->timer); 1482 1483 b44_enable_ints(bp); 1484 1485 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 1486 phy_start(dev->phydev); 1487 1488 netif_start_queue(dev); 1489 out: 1490 return err; 1491 } 1492 1493 #ifdef CONFIG_NET_POLL_CONTROLLER 1494 /* 1495 * Polling receive - used by netconsole and other diagnostic tools 1496 * to allow network i/o with interrupts disabled. 1497 */ 1498 static void b44_poll_controller(struct net_device *dev) 1499 { 1500 disable_irq(dev->irq); 1501 b44_interrupt(dev->irq, dev); 1502 enable_irq(dev->irq); 1503 } 1504 #endif 1505 1506 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset) 1507 { 1508 u32 i; 1509 u32 *pattern = (u32 *) pp; 1510 1511 for (i = 0; i < bytes; i += sizeof(u32)) { 1512 bw32(bp, B44_FILT_ADDR, table_offset + i); 1513 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]); 1514 } 1515 } 1516 1517 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset) 1518 { 1519 int magicsync = 6; 1520 int k, j, len = offset; 1521 int ethaddr_bytes = ETH_ALEN; 1522 1523 memset(ppattern + offset, 0xff, magicsync); 1524 for (j = 0; j < magicsync; j++) 1525 set_bit(len++, (unsigned long *) pmask); 1526 1527 for (j = 0; j < B44_MAX_PATTERNS; j++) { 1528 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN) 1529 ethaddr_bytes = ETH_ALEN; 1530 else 1531 ethaddr_bytes = B44_PATTERN_SIZE - len; 1532 if (ethaddr_bytes <=0) 1533 break; 1534 for (k = 0; k< ethaddr_bytes; k++) { 1535 ppattern[offset + magicsync + 1536 (j * ETH_ALEN) + k] = macaddr[k]; 1537 set_bit(len++, (unsigned long *) pmask); 1538 } 1539 } 1540 return len - 1; 1541 } 1542 1543 /* Setup magic packet patterns in the b44 WOL 1544 * pattern matching filter. 1545 */ 1546 static void b44_setup_pseudo_magicp(struct b44 *bp) 1547 { 1548 1549 u32 val; 1550 int plen0, plen1, plen2; 1551 u8 *pwol_pattern; 1552 u8 pwol_mask[B44_PMASK_SIZE]; 1553 1554 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL); 1555 if (!pwol_pattern) 1556 return; 1557 1558 /* Ipv4 magic packet pattern - pattern 0.*/ 1559 memset(pwol_mask, 0, B44_PMASK_SIZE); 1560 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask, 1561 B44_ETHIPV4UDP_HLEN); 1562 1563 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE); 1564 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE); 1565 1566 /* Raw ethernet II magic packet pattern - pattern 1 */ 1567 memset(pwol_pattern, 0, B44_PATTERN_SIZE); 1568 memset(pwol_mask, 0, B44_PMASK_SIZE); 1569 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask, 1570 ETH_HLEN); 1571 1572 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, 1573 B44_PATTERN_BASE + B44_PATTERN_SIZE); 1574 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, 1575 B44_PMASK_BASE + B44_PMASK_SIZE); 1576 1577 /* Ipv6 magic packet pattern - pattern 2 */ 1578 memset(pwol_pattern, 0, B44_PATTERN_SIZE); 1579 memset(pwol_mask, 0, B44_PMASK_SIZE); 1580 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask, 1581 B44_ETHIPV6UDP_HLEN); 1582 1583 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, 1584 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE); 1585 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, 1586 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE); 1587 1588 kfree(pwol_pattern); 1589 1590 /* set these pattern's lengths: one less than each real length */ 1591 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE; 1592 bw32(bp, B44_WKUP_LEN, val); 1593 1594 /* enable wakeup pattern matching */ 1595 val = br32(bp, B44_DEVCTRL); 1596 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE); 1597 1598 } 1599 1600 #ifdef CONFIG_B44_PCI 1601 static void b44_setup_wol_pci(struct b44 *bp) 1602 { 1603 u16 val; 1604 1605 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) { 1606 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE); 1607 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val); 1608 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE); 1609 } 1610 } 1611 #else 1612 static inline void b44_setup_wol_pci(struct b44 *bp) { } 1613 #endif /* CONFIG_B44_PCI */ 1614 1615 static void b44_setup_wol(struct b44 *bp) 1616 { 1617 u32 val; 1618 1619 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI); 1620 1621 if (bp->flags & B44_FLAG_B0_ANDLATER) { 1622 1623 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE); 1624 1625 val = bp->dev->dev_addr[2] << 24 | 1626 bp->dev->dev_addr[3] << 16 | 1627 bp->dev->dev_addr[4] << 8 | 1628 bp->dev->dev_addr[5]; 1629 bw32(bp, B44_ADDR_LO, val); 1630 1631 val = bp->dev->dev_addr[0] << 8 | 1632 bp->dev->dev_addr[1]; 1633 bw32(bp, B44_ADDR_HI, val); 1634 1635 val = br32(bp, B44_DEVCTRL); 1636 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE); 1637 1638 } else { 1639 b44_setup_pseudo_magicp(bp); 1640 } 1641 b44_setup_wol_pci(bp); 1642 } 1643 1644 static int b44_close(struct net_device *dev) 1645 { 1646 struct b44 *bp = netdev_priv(dev); 1647 1648 netif_stop_queue(dev); 1649 1650 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 1651 phy_stop(dev->phydev); 1652 1653 napi_disable(&bp->napi); 1654 1655 del_timer_sync(&bp->timer); 1656 1657 spin_lock_irq(&bp->lock); 1658 1659 b44_halt(bp); 1660 b44_free_rings(bp); 1661 netif_carrier_off(dev); 1662 1663 spin_unlock_irq(&bp->lock); 1664 1665 free_irq(dev->irq, dev); 1666 1667 if (bp->flags & B44_FLAG_WOL_ENABLE) { 1668 b44_init_hw(bp, B44_PARTIAL_RESET); 1669 b44_setup_wol(bp); 1670 } 1671 1672 b44_free_consistent(bp); 1673 1674 return 0; 1675 } 1676 1677 static void b44_get_stats64(struct net_device *dev, 1678 struct rtnl_link_stats64 *nstat) 1679 { 1680 struct b44 *bp = netdev_priv(dev); 1681 struct b44_hw_stats *hwstat = &bp->hw_stats; 1682 unsigned int start; 1683 1684 do { 1685 start = u64_stats_fetch_begin_irq(&hwstat->syncp); 1686 1687 /* Convert HW stats into rtnl_link_stats64 stats. */ 1688 nstat->rx_packets = hwstat->rx_pkts; 1689 nstat->tx_packets = hwstat->tx_pkts; 1690 nstat->rx_bytes = hwstat->rx_octets; 1691 nstat->tx_bytes = hwstat->tx_octets; 1692 nstat->tx_errors = (hwstat->tx_jabber_pkts + 1693 hwstat->tx_oversize_pkts + 1694 hwstat->tx_underruns + 1695 hwstat->tx_excessive_cols + 1696 hwstat->tx_late_cols); 1697 nstat->multicast = hwstat->rx_multicast_pkts; 1698 nstat->collisions = hwstat->tx_total_cols; 1699 1700 nstat->rx_length_errors = (hwstat->rx_oversize_pkts + 1701 hwstat->rx_undersize); 1702 nstat->rx_over_errors = hwstat->rx_missed_pkts; 1703 nstat->rx_frame_errors = hwstat->rx_align_errs; 1704 nstat->rx_crc_errors = hwstat->rx_crc_errs; 1705 nstat->rx_errors = (hwstat->rx_jabber_pkts + 1706 hwstat->rx_oversize_pkts + 1707 hwstat->rx_missed_pkts + 1708 hwstat->rx_crc_align_errs + 1709 hwstat->rx_undersize + 1710 hwstat->rx_crc_errs + 1711 hwstat->rx_align_errs + 1712 hwstat->rx_symbol_errs); 1713 1714 nstat->tx_aborted_errors = hwstat->tx_underruns; 1715 #if 0 1716 /* Carrier lost counter seems to be broken for some devices */ 1717 nstat->tx_carrier_errors = hwstat->tx_carrier_lost; 1718 #endif 1719 } while (u64_stats_fetch_retry_irq(&hwstat->syncp, start)); 1720 1721 } 1722 1723 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev) 1724 { 1725 struct netdev_hw_addr *ha; 1726 int i, num_ents; 1727 1728 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE); 1729 i = 0; 1730 netdev_for_each_mc_addr(ha, dev) { 1731 if (i == num_ents) 1732 break; 1733 __b44_cam_write(bp, ha->addr, i++ + 1); 1734 } 1735 return i+1; 1736 } 1737 1738 static void __b44_set_rx_mode(struct net_device *dev) 1739 { 1740 struct b44 *bp = netdev_priv(dev); 1741 u32 val; 1742 1743 val = br32(bp, B44_RXCONFIG); 1744 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI); 1745 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) { 1746 val |= RXCONFIG_PROMISC; 1747 bw32(bp, B44_RXCONFIG, val); 1748 } else { 1749 unsigned char zero[6] = {0, 0, 0, 0, 0, 0}; 1750 int i = 1; 1751 1752 __b44_set_mac_addr(bp); 1753 1754 if ((dev->flags & IFF_ALLMULTI) || 1755 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE)) 1756 val |= RXCONFIG_ALLMULTI; 1757 else 1758 i = __b44_load_mcast(bp, dev); 1759 1760 for (; i < 64; i++) 1761 __b44_cam_write(bp, zero, i); 1762 1763 bw32(bp, B44_RXCONFIG, val); 1764 val = br32(bp, B44_CAM_CTRL); 1765 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE); 1766 } 1767 } 1768 1769 static void b44_set_rx_mode(struct net_device *dev) 1770 { 1771 struct b44 *bp = netdev_priv(dev); 1772 1773 spin_lock_irq(&bp->lock); 1774 __b44_set_rx_mode(dev); 1775 spin_unlock_irq(&bp->lock); 1776 } 1777 1778 static u32 b44_get_msglevel(struct net_device *dev) 1779 { 1780 struct b44 *bp = netdev_priv(dev); 1781 return bp->msg_enable; 1782 } 1783 1784 static void b44_set_msglevel(struct net_device *dev, u32 value) 1785 { 1786 struct b44 *bp = netdev_priv(dev); 1787 bp->msg_enable = value; 1788 } 1789 1790 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) 1791 { 1792 struct b44 *bp = netdev_priv(dev); 1793 struct ssb_bus *bus = bp->sdev->bus; 1794 1795 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); 1796 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version)); 1797 switch (bus->bustype) { 1798 case SSB_BUSTYPE_PCI: 1799 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info)); 1800 break; 1801 case SSB_BUSTYPE_SSB: 1802 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info)); 1803 break; 1804 case SSB_BUSTYPE_PCMCIA: 1805 case SSB_BUSTYPE_SDIO: 1806 WARN_ON(1); /* A device with this bus does not exist. */ 1807 break; 1808 } 1809 } 1810 1811 static int b44_nway_reset(struct net_device *dev) 1812 { 1813 struct b44 *bp = netdev_priv(dev); 1814 u32 bmcr; 1815 int r; 1816 1817 spin_lock_irq(&bp->lock); 1818 b44_readphy(bp, MII_BMCR, &bmcr); 1819 b44_readphy(bp, MII_BMCR, &bmcr); 1820 r = -EINVAL; 1821 if (bmcr & BMCR_ANENABLE) { 1822 b44_writephy(bp, MII_BMCR, 1823 bmcr | BMCR_ANRESTART); 1824 r = 0; 1825 } 1826 spin_unlock_irq(&bp->lock); 1827 1828 return r; 1829 } 1830 1831 static int b44_get_link_ksettings(struct net_device *dev, 1832 struct ethtool_link_ksettings *cmd) 1833 { 1834 struct b44 *bp = netdev_priv(dev); 1835 u32 supported, advertising; 1836 1837 if (bp->flags & B44_FLAG_EXTERNAL_PHY) { 1838 BUG_ON(!dev->phydev); 1839 return phy_ethtool_ksettings_get(dev->phydev, cmd); 1840 } 1841 1842 supported = (SUPPORTED_Autoneg); 1843 supported |= (SUPPORTED_100baseT_Half | 1844 SUPPORTED_100baseT_Full | 1845 SUPPORTED_10baseT_Half | 1846 SUPPORTED_10baseT_Full | 1847 SUPPORTED_MII); 1848 1849 advertising = 0; 1850 if (bp->flags & B44_FLAG_ADV_10HALF) 1851 advertising |= ADVERTISED_10baseT_Half; 1852 if (bp->flags & B44_FLAG_ADV_10FULL) 1853 advertising |= ADVERTISED_10baseT_Full; 1854 if (bp->flags & B44_FLAG_ADV_100HALF) 1855 advertising |= ADVERTISED_100baseT_Half; 1856 if (bp->flags & B44_FLAG_ADV_100FULL) 1857 advertising |= ADVERTISED_100baseT_Full; 1858 advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; 1859 cmd->base.speed = (bp->flags & B44_FLAG_100_BASE_T) ? 1860 SPEED_100 : SPEED_10; 1861 cmd->base.duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ? 1862 DUPLEX_FULL : DUPLEX_HALF; 1863 cmd->base.port = 0; 1864 cmd->base.phy_address = bp->phy_addr; 1865 cmd->base.autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ? 1866 AUTONEG_DISABLE : AUTONEG_ENABLE; 1867 if (cmd->base.autoneg == AUTONEG_ENABLE) 1868 advertising |= ADVERTISED_Autoneg; 1869 1870 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1871 supported); 1872 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1873 advertising); 1874 1875 if (!netif_running(dev)){ 1876 cmd->base.speed = 0; 1877 cmd->base.duplex = 0xff; 1878 } 1879 1880 return 0; 1881 } 1882 1883 static int b44_set_link_ksettings(struct net_device *dev, 1884 const struct ethtool_link_ksettings *cmd) 1885 { 1886 struct b44 *bp = netdev_priv(dev); 1887 u32 speed; 1888 int ret; 1889 u32 advertising; 1890 1891 if (bp->flags & B44_FLAG_EXTERNAL_PHY) { 1892 BUG_ON(!dev->phydev); 1893 spin_lock_irq(&bp->lock); 1894 if (netif_running(dev)) 1895 b44_setup_phy(bp); 1896 1897 ret = phy_ethtool_ksettings_set(dev->phydev, cmd); 1898 1899 spin_unlock_irq(&bp->lock); 1900 1901 return ret; 1902 } 1903 1904 speed = cmd->base.speed; 1905 1906 ethtool_convert_link_mode_to_legacy_u32(&advertising, 1907 cmd->link_modes.advertising); 1908 1909 /* We do not support gigabit. */ 1910 if (cmd->base.autoneg == AUTONEG_ENABLE) { 1911 if (advertising & 1912 (ADVERTISED_1000baseT_Half | 1913 ADVERTISED_1000baseT_Full)) 1914 return -EINVAL; 1915 } else if ((speed != SPEED_100 && 1916 speed != SPEED_10) || 1917 (cmd->base.duplex != DUPLEX_HALF && 1918 cmd->base.duplex != DUPLEX_FULL)) { 1919 return -EINVAL; 1920 } 1921 1922 spin_lock_irq(&bp->lock); 1923 1924 if (cmd->base.autoneg == AUTONEG_ENABLE) { 1925 bp->flags &= ~(B44_FLAG_FORCE_LINK | 1926 B44_FLAG_100_BASE_T | 1927 B44_FLAG_FULL_DUPLEX | 1928 B44_FLAG_ADV_10HALF | 1929 B44_FLAG_ADV_10FULL | 1930 B44_FLAG_ADV_100HALF | 1931 B44_FLAG_ADV_100FULL); 1932 if (advertising == 0) { 1933 bp->flags |= (B44_FLAG_ADV_10HALF | 1934 B44_FLAG_ADV_10FULL | 1935 B44_FLAG_ADV_100HALF | 1936 B44_FLAG_ADV_100FULL); 1937 } else { 1938 if (advertising & ADVERTISED_10baseT_Half) 1939 bp->flags |= B44_FLAG_ADV_10HALF; 1940 if (advertising & ADVERTISED_10baseT_Full) 1941 bp->flags |= B44_FLAG_ADV_10FULL; 1942 if (advertising & ADVERTISED_100baseT_Half) 1943 bp->flags |= B44_FLAG_ADV_100HALF; 1944 if (advertising & ADVERTISED_100baseT_Full) 1945 bp->flags |= B44_FLAG_ADV_100FULL; 1946 } 1947 } else { 1948 bp->flags |= B44_FLAG_FORCE_LINK; 1949 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX); 1950 if (speed == SPEED_100) 1951 bp->flags |= B44_FLAG_100_BASE_T; 1952 if (cmd->base.duplex == DUPLEX_FULL) 1953 bp->flags |= B44_FLAG_FULL_DUPLEX; 1954 } 1955 1956 if (netif_running(dev)) 1957 b44_setup_phy(bp); 1958 1959 spin_unlock_irq(&bp->lock); 1960 1961 return 0; 1962 } 1963 1964 static void b44_get_ringparam(struct net_device *dev, 1965 struct ethtool_ringparam *ering) 1966 { 1967 struct b44 *bp = netdev_priv(dev); 1968 1969 ering->rx_max_pending = B44_RX_RING_SIZE - 1; 1970 ering->rx_pending = bp->rx_pending; 1971 1972 /* XXX ethtool lacks a tx_max_pending, oops... */ 1973 } 1974 1975 static int b44_set_ringparam(struct net_device *dev, 1976 struct ethtool_ringparam *ering) 1977 { 1978 struct b44 *bp = netdev_priv(dev); 1979 1980 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) || 1981 (ering->rx_mini_pending != 0) || 1982 (ering->rx_jumbo_pending != 0) || 1983 (ering->tx_pending > B44_TX_RING_SIZE - 1)) 1984 return -EINVAL; 1985 1986 spin_lock_irq(&bp->lock); 1987 1988 bp->rx_pending = ering->rx_pending; 1989 bp->tx_pending = ering->tx_pending; 1990 1991 b44_halt(bp); 1992 b44_init_rings(bp); 1993 b44_init_hw(bp, B44_FULL_RESET); 1994 netif_wake_queue(bp->dev); 1995 spin_unlock_irq(&bp->lock); 1996 1997 b44_enable_ints(bp); 1998 1999 return 0; 2000 } 2001 2002 static void b44_get_pauseparam(struct net_device *dev, 2003 struct ethtool_pauseparam *epause) 2004 { 2005 struct b44 *bp = netdev_priv(dev); 2006 2007 epause->autoneg = 2008 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0; 2009 epause->rx_pause = 2010 (bp->flags & B44_FLAG_RX_PAUSE) != 0; 2011 epause->tx_pause = 2012 (bp->flags & B44_FLAG_TX_PAUSE) != 0; 2013 } 2014 2015 static int b44_set_pauseparam(struct net_device *dev, 2016 struct ethtool_pauseparam *epause) 2017 { 2018 struct b44 *bp = netdev_priv(dev); 2019 2020 spin_lock_irq(&bp->lock); 2021 if (epause->autoneg) 2022 bp->flags |= B44_FLAG_PAUSE_AUTO; 2023 else 2024 bp->flags &= ~B44_FLAG_PAUSE_AUTO; 2025 if (epause->rx_pause) 2026 bp->flags |= B44_FLAG_RX_PAUSE; 2027 else 2028 bp->flags &= ~B44_FLAG_RX_PAUSE; 2029 if (epause->tx_pause) 2030 bp->flags |= B44_FLAG_TX_PAUSE; 2031 else 2032 bp->flags &= ~B44_FLAG_TX_PAUSE; 2033 if (bp->flags & B44_FLAG_PAUSE_AUTO) { 2034 b44_halt(bp); 2035 b44_init_rings(bp); 2036 b44_init_hw(bp, B44_FULL_RESET); 2037 } else { 2038 __b44_set_flow_ctrl(bp, bp->flags); 2039 } 2040 spin_unlock_irq(&bp->lock); 2041 2042 b44_enable_ints(bp); 2043 2044 return 0; 2045 } 2046 2047 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2048 { 2049 switch(stringset) { 2050 case ETH_SS_STATS: 2051 memcpy(data, *b44_gstrings, sizeof(b44_gstrings)); 2052 break; 2053 } 2054 } 2055 2056 static int b44_get_sset_count(struct net_device *dev, int sset) 2057 { 2058 switch (sset) { 2059 case ETH_SS_STATS: 2060 return ARRAY_SIZE(b44_gstrings); 2061 default: 2062 return -EOPNOTSUPP; 2063 } 2064 } 2065 2066 static void b44_get_ethtool_stats(struct net_device *dev, 2067 struct ethtool_stats *stats, u64 *data) 2068 { 2069 struct b44 *bp = netdev_priv(dev); 2070 struct b44_hw_stats *hwstat = &bp->hw_stats; 2071 u64 *data_src, *data_dst; 2072 unsigned int start; 2073 u32 i; 2074 2075 spin_lock_irq(&bp->lock); 2076 b44_stats_update(bp); 2077 spin_unlock_irq(&bp->lock); 2078 2079 do { 2080 data_src = &hwstat->tx_good_octets; 2081 data_dst = data; 2082 start = u64_stats_fetch_begin_irq(&hwstat->syncp); 2083 2084 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++) 2085 *data_dst++ = *data_src++; 2086 2087 } while (u64_stats_fetch_retry_irq(&hwstat->syncp, start)); 2088 } 2089 2090 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 2091 { 2092 struct b44 *bp = netdev_priv(dev); 2093 2094 wol->supported = WAKE_MAGIC; 2095 if (bp->flags & B44_FLAG_WOL_ENABLE) 2096 wol->wolopts = WAKE_MAGIC; 2097 else 2098 wol->wolopts = 0; 2099 memset(&wol->sopass, 0, sizeof(wol->sopass)); 2100 } 2101 2102 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 2103 { 2104 struct b44 *bp = netdev_priv(dev); 2105 2106 spin_lock_irq(&bp->lock); 2107 if (wol->wolopts & WAKE_MAGIC) 2108 bp->flags |= B44_FLAG_WOL_ENABLE; 2109 else 2110 bp->flags &= ~B44_FLAG_WOL_ENABLE; 2111 spin_unlock_irq(&bp->lock); 2112 2113 device_set_wakeup_enable(bp->sdev->dev, wol->wolopts & WAKE_MAGIC); 2114 return 0; 2115 } 2116 2117 static const struct ethtool_ops b44_ethtool_ops = { 2118 .get_drvinfo = b44_get_drvinfo, 2119 .nway_reset = b44_nway_reset, 2120 .get_link = ethtool_op_get_link, 2121 .get_wol = b44_get_wol, 2122 .set_wol = b44_set_wol, 2123 .get_ringparam = b44_get_ringparam, 2124 .set_ringparam = b44_set_ringparam, 2125 .get_pauseparam = b44_get_pauseparam, 2126 .set_pauseparam = b44_set_pauseparam, 2127 .get_msglevel = b44_get_msglevel, 2128 .set_msglevel = b44_set_msglevel, 2129 .get_strings = b44_get_strings, 2130 .get_sset_count = b44_get_sset_count, 2131 .get_ethtool_stats = b44_get_ethtool_stats, 2132 .get_link_ksettings = b44_get_link_ksettings, 2133 .set_link_ksettings = b44_set_link_ksettings, 2134 }; 2135 2136 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 2137 { 2138 struct b44 *bp = netdev_priv(dev); 2139 int err = -EINVAL; 2140 2141 if (!netif_running(dev)) 2142 goto out; 2143 2144 spin_lock_irq(&bp->lock); 2145 if (bp->flags & B44_FLAG_EXTERNAL_PHY) { 2146 BUG_ON(!dev->phydev); 2147 err = phy_mii_ioctl(dev->phydev, ifr, cmd); 2148 } else { 2149 err = generic_mii_ioctl(&bp->mii_if, if_mii(ifr), cmd, NULL); 2150 } 2151 spin_unlock_irq(&bp->lock); 2152 out: 2153 return err; 2154 } 2155 2156 static int b44_get_invariants(struct b44 *bp) 2157 { 2158 struct ssb_device *sdev = bp->sdev; 2159 int err = 0; 2160 u8 *addr; 2161 2162 bp->dma_offset = ssb_dma_translation(sdev); 2163 2164 if (sdev->bus->bustype == SSB_BUSTYPE_SSB && 2165 instance > 1) { 2166 addr = sdev->bus->sprom.et1mac; 2167 bp->phy_addr = sdev->bus->sprom.et1phyaddr; 2168 } else { 2169 addr = sdev->bus->sprom.et0mac; 2170 bp->phy_addr = sdev->bus->sprom.et0phyaddr; 2171 } 2172 /* Some ROMs have buggy PHY addresses with the high 2173 * bits set (sign extension?). Truncate them to a 2174 * valid PHY address. */ 2175 bp->phy_addr &= 0x1F; 2176 2177 memcpy(bp->dev->dev_addr, addr, ETH_ALEN); 2178 2179 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){ 2180 pr_err("Invalid MAC address found in EEPROM\n"); 2181 return -EINVAL; 2182 } 2183 2184 bp->imask = IMASK_DEF; 2185 2186 /* XXX - really required? 2187 bp->flags |= B44_FLAG_BUGGY_TXPTR; 2188 */ 2189 2190 if (bp->sdev->id.revision >= 7) 2191 bp->flags |= B44_FLAG_B0_ANDLATER; 2192 2193 return err; 2194 } 2195 2196 static const struct net_device_ops b44_netdev_ops = { 2197 .ndo_open = b44_open, 2198 .ndo_stop = b44_close, 2199 .ndo_start_xmit = b44_start_xmit, 2200 .ndo_get_stats64 = b44_get_stats64, 2201 .ndo_set_rx_mode = b44_set_rx_mode, 2202 .ndo_set_mac_address = b44_set_mac_addr, 2203 .ndo_validate_addr = eth_validate_addr, 2204 .ndo_do_ioctl = b44_ioctl, 2205 .ndo_tx_timeout = b44_tx_timeout, 2206 .ndo_change_mtu = b44_change_mtu, 2207 #ifdef CONFIG_NET_POLL_CONTROLLER 2208 .ndo_poll_controller = b44_poll_controller, 2209 #endif 2210 }; 2211 2212 static void b44_adjust_link(struct net_device *dev) 2213 { 2214 struct b44 *bp = netdev_priv(dev); 2215 struct phy_device *phydev = dev->phydev; 2216 bool status_changed = 0; 2217 2218 BUG_ON(!phydev); 2219 2220 if (bp->old_link != phydev->link) { 2221 status_changed = 1; 2222 bp->old_link = phydev->link; 2223 } 2224 2225 /* reflect duplex change */ 2226 if (phydev->link) { 2227 if ((phydev->duplex == DUPLEX_HALF) && 2228 (bp->flags & B44_FLAG_FULL_DUPLEX)) { 2229 status_changed = 1; 2230 bp->flags &= ~B44_FLAG_FULL_DUPLEX; 2231 } else if ((phydev->duplex == DUPLEX_FULL) && 2232 !(bp->flags & B44_FLAG_FULL_DUPLEX)) { 2233 status_changed = 1; 2234 bp->flags |= B44_FLAG_FULL_DUPLEX; 2235 } 2236 } 2237 2238 if (status_changed) { 2239 u32 val = br32(bp, B44_TX_CTRL); 2240 if (bp->flags & B44_FLAG_FULL_DUPLEX) 2241 val |= TX_CTRL_DUPLEX; 2242 else 2243 val &= ~TX_CTRL_DUPLEX; 2244 bw32(bp, B44_TX_CTRL, val); 2245 phy_print_status(phydev); 2246 } 2247 } 2248 2249 static int b44_register_phy_one(struct b44 *bp) 2250 { 2251 struct mii_bus *mii_bus; 2252 struct ssb_device *sdev = bp->sdev; 2253 struct phy_device *phydev; 2254 char bus_id[MII_BUS_ID_SIZE + 3]; 2255 struct ssb_sprom *sprom = &sdev->bus->sprom; 2256 int err; 2257 2258 mii_bus = mdiobus_alloc(); 2259 if (!mii_bus) { 2260 dev_err(sdev->dev, "mdiobus_alloc() failed\n"); 2261 err = -ENOMEM; 2262 goto err_out; 2263 } 2264 2265 mii_bus->priv = bp; 2266 mii_bus->read = b44_mdio_read_phylib; 2267 mii_bus->write = b44_mdio_write_phylib; 2268 mii_bus->name = "b44_eth_mii"; 2269 mii_bus->parent = sdev->dev; 2270 mii_bus->phy_mask = ~(1 << bp->phy_addr); 2271 snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%x", instance); 2272 2273 bp->mii_bus = mii_bus; 2274 2275 err = mdiobus_register(mii_bus); 2276 if (err) { 2277 dev_err(sdev->dev, "failed to register MII bus\n"); 2278 goto err_out_mdiobus; 2279 } 2280 2281 if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) && 2282 (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) { 2283 2284 dev_info(sdev->dev, 2285 "could not find PHY at %i, use fixed one\n", 2286 bp->phy_addr); 2287 2288 bp->phy_addr = 0; 2289 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, "fixed-0", 2290 bp->phy_addr); 2291 } else { 2292 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id, 2293 bp->phy_addr); 2294 } 2295 2296 phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link, 2297 PHY_INTERFACE_MODE_MII); 2298 if (IS_ERR(phydev)) { 2299 dev_err(sdev->dev, "could not attach PHY at %i\n", 2300 bp->phy_addr); 2301 err = PTR_ERR(phydev); 2302 goto err_out_mdiobus_unregister; 2303 } 2304 2305 /* mask with MAC supported features */ 2306 phydev->supported &= (SUPPORTED_100baseT_Half | 2307 SUPPORTED_100baseT_Full | 2308 SUPPORTED_Autoneg | 2309 SUPPORTED_MII); 2310 phydev->advertising = phydev->supported; 2311 2312 bp->old_link = 0; 2313 bp->phy_addr = phydev->mdio.addr; 2314 2315 phy_attached_info(phydev); 2316 2317 return 0; 2318 2319 err_out_mdiobus_unregister: 2320 mdiobus_unregister(mii_bus); 2321 2322 err_out_mdiobus: 2323 mdiobus_free(mii_bus); 2324 2325 err_out: 2326 return err; 2327 } 2328 2329 static void b44_unregister_phy_one(struct b44 *bp) 2330 { 2331 struct net_device *dev = bp->dev; 2332 struct mii_bus *mii_bus = bp->mii_bus; 2333 2334 phy_disconnect(dev->phydev); 2335 mdiobus_unregister(mii_bus); 2336 mdiobus_free(mii_bus); 2337 } 2338 2339 static int b44_init_one(struct ssb_device *sdev, 2340 const struct ssb_device_id *ent) 2341 { 2342 struct net_device *dev; 2343 struct b44 *bp; 2344 int err; 2345 2346 instance++; 2347 2348 pr_info_once("%s version %s\n", DRV_DESCRIPTION, DRV_MODULE_VERSION); 2349 2350 dev = alloc_etherdev(sizeof(*bp)); 2351 if (!dev) { 2352 err = -ENOMEM; 2353 goto out; 2354 } 2355 2356 SET_NETDEV_DEV(dev, sdev->dev); 2357 2358 /* No interesting netdevice features in this card... */ 2359 dev->features |= 0; 2360 2361 bp = netdev_priv(dev); 2362 bp->sdev = sdev; 2363 bp->dev = dev; 2364 bp->force_copybreak = 0; 2365 2366 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE); 2367 2368 spin_lock_init(&bp->lock); 2369 2370 bp->rx_pending = B44_DEF_RX_RING_PENDING; 2371 bp->tx_pending = B44_DEF_TX_RING_PENDING; 2372 2373 dev->netdev_ops = &b44_netdev_ops; 2374 netif_napi_add(dev, &bp->napi, b44_poll, 64); 2375 dev->watchdog_timeo = B44_TX_TIMEOUT; 2376 dev->min_mtu = B44_MIN_MTU; 2377 dev->max_mtu = B44_MAX_MTU; 2378 dev->irq = sdev->irq; 2379 dev->ethtool_ops = &b44_ethtool_ops; 2380 2381 err = ssb_bus_powerup(sdev->bus, 0); 2382 if (err) { 2383 dev_err(sdev->dev, 2384 "Failed to powerup the bus\n"); 2385 goto err_out_free_dev; 2386 } 2387 2388 if (dma_set_mask_and_coherent(sdev->dma_dev, DMA_BIT_MASK(30))) { 2389 dev_err(sdev->dev, 2390 "Required 30BIT DMA mask unsupported by the system\n"); 2391 goto err_out_powerdown; 2392 } 2393 2394 err = b44_get_invariants(bp); 2395 if (err) { 2396 dev_err(sdev->dev, 2397 "Problem fetching invariants of chip, aborting\n"); 2398 goto err_out_powerdown; 2399 } 2400 2401 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) { 2402 dev_err(sdev->dev, "No PHY present on this MAC, aborting\n"); 2403 err = -ENODEV; 2404 goto err_out_powerdown; 2405 } 2406 2407 bp->mii_if.dev = dev; 2408 bp->mii_if.mdio_read = b44_mdio_read_mii; 2409 bp->mii_if.mdio_write = b44_mdio_write_mii; 2410 bp->mii_if.phy_id = bp->phy_addr; 2411 bp->mii_if.phy_id_mask = 0x1f; 2412 bp->mii_if.reg_num_mask = 0x1f; 2413 2414 /* By default, advertise all speed/duplex settings. */ 2415 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL | 2416 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL); 2417 2418 /* By default, auto-negotiate PAUSE. */ 2419 bp->flags |= B44_FLAG_PAUSE_AUTO; 2420 2421 err = register_netdev(dev); 2422 if (err) { 2423 dev_err(sdev->dev, "Cannot register net device, aborting\n"); 2424 goto err_out_powerdown; 2425 } 2426 2427 netif_carrier_off(dev); 2428 2429 ssb_set_drvdata(sdev, dev); 2430 2431 /* Chip reset provides power to the b44 MAC & PCI cores, which 2432 * is necessary for MAC register access. 2433 */ 2434 b44_chip_reset(bp, B44_CHIP_RESET_FULL); 2435 2436 /* do a phy reset to test if there is an active phy */ 2437 err = b44_phy_reset(bp); 2438 if (err < 0) { 2439 dev_err(sdev->dev, "phy reset failed\n"); 2440 goto err_out_unregister_netdev; 2441 } 2442 2443 if (bp->flags & B44_FLAG_EXTERNAL_PHY) { 2444 err = b44_register_phy_one(bp); 2445 if (err) { 2446 dev_err(sdev->dev, "Cannot register PHY, aborting\n"); 2447 goto err_out_unregister_netdev; 2448 } 2449 } 2450 2451 device_set_wakeup_capable(sdev->dev, true); 2452 netdev_info(dev, "%s %pM\n", DRV_DESCRIPTION, dev->dev_addr); 2453 2454 return 0; 2455 2456 err_out_unregister_netdev: 2457 unregister_netdev(dev); 2458 err_out_powerdown: 2459 ssb_bus_may_powerdown(sdev->bus); 2460 2461 err_out_free_dev: 2462 netif_napi_del(&bp->napi); 2463 free_netdev(dev); 2464 2465 out: 2466 return err; 2467 } 2468 2469 static void b44_remove_one(struct ssb_device *sdev) 2470 { 2471 struct net_device *dev = ssb_get_drvdata(sdev); 2472 struct b44 *bp = netdev_priv(dev); 2473 2474 unregister_netdev(dev); 2475 if (bp->flags & B44_FLAG_EXTERNAL_PHY) 2476 b44_unregister_phy_one(bp); 2477 ssb_device_disable(sdev, 0); 2478 ssb_bus_may_powerdown(sdev->bus); 2479 netif_napi_del(&bp->napi); 2480 free_netdev(dev); 2481 ssb_pcihost_set_power_state(sdev, PCI_D3hot); 2482 ssb_set_drvdata(sdev, NULL); 2483 } 2484 2485 static int b44_suspend(struct ssb_device *sdev, pm_message_t state) 2486 { 2487 struct net_device *dev = ssb_get_drvdata(sdev); 2488 struct b44 *bp = netdev_priv(dev); 2489 2490 if (!netif_running(dev)) 2491 return 0; 2492 2493 del_timer_sync(&bp->timer); 2494 2495 spin_lock_irq(&bp->lock); 2496 2497 b44_halt(bp); 2498 netif_carrier_off(bp->dev); 2499 netif_device_detach(bp->dev); 2500 b44_free_rings(bp); 2501 2502 spin_unlock_irq(&bp->lock); 2503 2504 free_irq(dev->irq, dev); 2505 if (bp->flags & B44_FLAG_WOL_ENABLE) { 2506 b44_init_hw(bp, B44_PARTIAL_RESET); 2507 b44_setup_wol(bp); 2508 } 2509 2510 ssb_pcihost_set_power_state(sdev, PCI_D3hot); 2511 return 0; 2512 } 2513 2514 static int b44_resume(struct ssb_device *sdev) 2515 { 2516 struct net_device *dev = ssb_get_drvdata(sdev); 2517 struct b44 *bp = netdev_priv(dev); 2518 int rc = 0; 2519 2520 rc = ssb_bus_powerup(sdev->bus, 0); 2521 if (rc) { 2522 dev_err(sdev->dev, 2523 "Failed to powerup the bus\n"); 2524 return rc; 2525 } 2526 2527 if (!netif_running(dev)) 2528 return 0; 2529 2530 spin_lock_irq(&bp->lock); 2531 b44_init_rings(bp); 2532 b44_init_hw(bp, B44_FULL_RESET); 2533 spin_unlock_irq(&bp->lock); 2534 2535 /* 2536 * As a shared interrupt, the handler can be called immediately. To be 2537 * able to check the interrupt status the hardware must already be 2538 * powered back on (b44_init_hw). 2539 */ 2540 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev); 2541 if (rc) { 2542 netdev_err(dev, "request_irq failed\n"); 2543 spin_lock_irq(&bp->lock); 2544 b44_halt(bp); 2545 b44_free_rings(bp); 2546 spin_unlock_irq(&bp->lock); 2547 return rc; 2548 } 2549 2550 netif_device_attach(bp->dev); 2551 2552 b44_enable_ints(bp); 2553 netif_wake_queue(dev); 2554 2555 mod_timer(&bp->timer, jiffies + 1); 2556 2557 return 0; 2558 } 2559 2560 static struct ssb_driver b44_ssb_driver = { 2561 .name = DRV_MODULE_NAME, 2562 .id_table = b44_ssb_tbl, 2563 .probe = b44_init_one, 2564 .remove = b44_remove_one, 2565 .suspend = b44_suspend, 2566 .resume = b44_resume, 2567 }; 2568 2569 static inline int __init b44_pci_init(void) 2570 { 2571 int err = 0; 2572 #ifdef CONFIG_B44_PCI 2573 err = ssb_pcihost_register(&b44_pci_driver); 2574 #endif 2575 return err; 2576 } 2577 2578 static inline void b44_pci_exit(void) 2579 { 2580 #ifdef CONFIG_B44_PCI 2581 ssb_pcihost_unregister(&b44_pci_driver); 2582 #endif 2583 } 2584 2585 static int __init b44_init(void) 2586 { 2587 unsigned int dma_desc_align_size = dma_get_cache_alignment(); 2588 int err; 2589 2590 /* Setup paramaters for syncing RX/TX DMA descriptors */ 2591 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc)); 2592 2593 err = b44_pci_init(); 2594 if (err) 2595 return err; 2596 err = ssb_driver_register(&b44_ssb_driver); 2597 if (err) 2598 b44_pci_exit(); 2599 return err; 2600 } 2601 2602 static void __exit b44_cleanup(void) 2603 { 2604 ssb_driver_unregister(&b44_ssb_driver); 2605 b44_pci_exit(); 2606 } 2607 2608 module_init(b44_init); 2609 module_exit(b44_cleanup); 2610 2611