1 /* 2 * drivers/net/ethernet/ibm/emac/core.c 3 * 4 * Driver for PowerPC 4xx on-chip ethernet controller. 5 * 6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. 7 * <benh@kernel.crashing.org> 8 * 9 * Based on the arch/ppc version of the driver: 10 * 11 * Copyright (c) 2004, 2005 Zultys Technologies. 12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 13 * 14 * Based on original work by 15 * Matt Porter <mporter@kernel.crashing.org> 16 * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> 17 * Armin Kuster <akuster@mvista.com> 18 * Johnnie Peters <jpeters@mvista.com> 19 * 20 * This program is free software; you can redistribute it and/or modify it 21 * under the terms of the GNU General Public License as published by the 22 * Free Software Foundation; either version 2 of the License, or (at your 23 * option) any later version. 24 * 25 */ 26 27 #include <linux/module.h> 28 #include <linux/sched.h> 29 #include <linux/string.h> 30 #include <linux/errno.h> 31 #include <linux/delay.h> 32 #include <linux/types.h> 33 #include <linux/pci.h> 34 #include <linux/etherdevice.h> 35 #include <linux/skbuff.h> 36 #include <linux/crc32.h> 37 #include <linux/ethtool.h> 38 #include <linux/mii.h> 39 #include <linux/bitops.h> 40 #include <linux/workqueue.h> 41 #include <linux/of.h> 42 #include <linux/of_address.h> 43 #include <linux/of_irq.h> 44 #include <linux/of_net.h> 45 #include <linux/slab.h> 46 47 #include <asm/processor.h> 48 #include <asm/io.h> 49 #include <asm/dma.h> 50 #include <asm/uaccess.h> 51 #include <asm/dcr.h> 52 #include <asm/dcr-regs.h> 53 54 #include "core.h" 55 56 /* 57 * Lack of dma_unmap_???? calls is intentional. 58 * 59 * API-correct usage requires additional support state information to be 60 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to 61 * EMAC design (e.g. TX buffer passed from network stack can be split into 62 * several BDs, dma_map_single/dma_map_page can be used to map particular BD), 63 * maintaining such information will add additional overhead. 64 * Current DMA API implementation for 4xx processors only ensures cache coherency 65 * and dma_unmap_???? routines are empty and are likely to stay this way. 66 * I decided to omit dma_unmap_??? calls because I don't want to add additional 67 * complexity just for the sake of following some abstract API, when it doesn't 68 * add any real benefit to the driver. I understand that this decision maybe 69 * controversial, but I really tried to make code API-correct and efficient 70 * at the same time and didn't come up with code I liked :(. --ebs 71 */ 72 73 #define DRV_NAME "emac" 74 #define DRV_VERSION "3.54" 75 #define DRV_DESC "PPC 4xx OCP EMAC driver" 76 77 MODULE_DESCRIPTION(DRV_DESC); 78 MODULE_AUTHOR 79 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); 80 MODULE_LICENSE("GPL"); 81 82 /* minimum number of free TX descriptors required to wake up TX process */ 83 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) 84 85 /* If packet size is less than this number, we allocate small skb and copy packet 86 * contents into it instead of just sending original big skb up 87 */ 88 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD 89 90 /* Since multiple EMACs share MDIO lines in various ways, we need 91 * to avoid re-using the same PHY ID in cases where the arch didn't 92 * setup precise phy_map entries 93 * 94 * XXX This is something that needs to be reworked as we can have multiple 95 * EMAC "sets" (multiple ASICs containing several EMACs) though we can 96 * probably require in that case to have explicit PHY IDs in the device-tree 97 */ 98 static u32 busy_phy_map; 99 static DEFINE_MUTEX(emac_phy_map_lock); 100 101 /* This is the wait queue used to wait on any event related to probe, that 102 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc... 103 */ 104 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait); 105 106 /* Having stable interface names is a doomed idea. However, it would be nice 107 * if we didn't have completely random interface names at boot too :-) It's 108 * just a matter of making everybody's life easier. Since we are doing 109 * threaded probing, it's a bit harder though. The base idea here is that 110 * we make up a list of all emacs in the device-tree before we register the 111 * driver. Every emac will then wait for the previous one in the list to 112 * initialize before itself. We should also keep that list ordered by 113 * cell_index. 114 * That list is only 4 entries long, meaning that additional EMACs don't 115 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased. 116 */ 117 118 #define EMAC_BOOT_LIST_SIZE 4 119 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE]; 120 121 /* How long should I wait for dependent devices ? */ 122 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5) 123 124 /* I don't want to litter system log with timeout errors 125 * when we have brain-damaged PHY. 126 */ 127 static inline void emac_report_timeout_error(struct emac_instance *dev, 128 const char *error) 129 { 130 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX | 131 EMAC_FTR_460EX_PHY_CLK_FIX | 132 EMAC_FTR_440EP_PHY_CLK_FIX)) 133 DBG(dev, "%s" NL, error); 134 else if (net_ratelimit()) 135 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name, 136 error); 137 } 138 139 /* EMAC PHY clock workaround: 140 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, 141 * which allows controlling each EMAC clock 142 */ 143 static inline void emac_rx_clk_tx(struct emac_instance *dev) 144 { 145 #ifdef CONFIG_PPC_DCR_NATIVE 146 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) 147 dcri_clrset(SDR0, SDR0_MFR, 148 0, SDR0_MFR_ECS >> dev->cell_index); 149 #endif 150 } 151 152 static inline void emac_rx_clk_default(struct emac_instance *dev) 153 { 154 #ifdef CONFIG_PPC_DCR_NATIVE 155 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) 156 dcri_clrset(SDR0, SDR0_MFR, 157 SDR0_MFR_ECS >> dev->cell_index, 0); 158 #endif 159 } 160 161 /* PHY polling intervals */ 162 #define PHY_POLL_LINK_ON HZ 163 #define PHY_POLL_LINK_OFF (HZ / 5) 164 165 /* Graceful stop timeouts in us. 166 * We should allow up to 1 frame time (full-duplex, ignoring collisions) 167 */ 168 #define STOP_TIMEOUT_10 1230 169 #define STOP_TIMEOUT_100 124 170 #define STOP_TIMEOUT_1000 13 171 #define STOP_TIMEOUT_1000_JUMBO 73 172 173 static unsigned char default_mcast_addr[] = { 174 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 175 }; 176 177 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ 178 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { 179 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", 180 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", 181 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", 182 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", 183 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", 184 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", 185 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", 186 "rx_bad_packet", "rx_runt_packet", "rx_short_event", 187 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", 188 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", 189 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", 190 "tx_bd_excessive_collisions", "tx_bd_late_collision", 191 "tx_bd_multple_collisions", "tx_bd_single_collision", 192 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", 193 "tx_errors" 194 }; 195 196 static irqreturn_t emac_irq(int irq, void *dev_instance); 197 static void emac_clean_tx_ring(struct emac_instance *dev); 198 static void __emac_set_multicast_list(struct emac_instance *dev); 199 200 static inline int emac_phy_supports_gige(int phy_mode) 201 { 202 return phy_mode == PHY_MODE_GMII || 203 phy_mode == PHY_MODE_RGMII || 204 phy_mode == PHY_MODE_SGMII || 205 phy_mode == PHY_MODE_TBI || 206 phy_mode == PHY_MODE_RTBI; 207 } 208 209 static inline int emac_phy_gpcs(int phy_mode) 210 { 211 return phy_mode == PHY_MODE_SGMII || 212 phy_mode == PHY_MODE_TBI || 213 phy_mode == PHY_MODE_RTBI; 214 } 215 216 static inline void emac_tx_enable(struct emac_instance *dev) 217 { 218 struct emac_regs __iomem *p = dev->emacp; 219 u32 r; 220 221 DBG(dev, "tx_enable" NL); 222 223 r = in_be32(&p->mr0); 224 if (!(r & EMAC_MR0_TXE)) 225 out_be32(&p->mr0, r | EMAC_MR0_TXE); 226 } 227 228 static void emac_tx_disable(struct emac_instance *dev) 229 { 230 struct emac_regs __iomem *p = dev->emacp; 231 u32 r; 232 233 DBG(dev, "tx_disable" NL); 234 235 r = in_be32(&p->mr0); 236 if (r & EMAC_MR0_TXE) { 237 int n = dev->stop_timeout; 238 out_be32(&p->mr0, r & ~EMAC_MR0_TXE); 239 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { 240 udelay(1); 241 --n; 242 } 243 if (unlikely(!n)) 244 emac_report_timeout_error(dev, "TX disable timeout"); 245 } 246 } 247 248 static void emac_rx_enable(struct emac_instance *dev) 249 { 250 struct emac_regs __iomem *p = dev->emacp; 251 u32 r; 252 253 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) 254 goto out; 255 256 DBG(dev, "rx_enable" NL); 257 258 r = in_be32(&p->mr0); 259 if (!(r & EMAC_MR0_RXE)) { 260 if (unlikely(!(r & EMAC_MR0_RXI))) { 261 /* Wait if previous async disable is still in progress */ 262 int n = dev->stop_timeout; 263 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { 264 udelay(1); 265 --n; 266 } 267 if (unlikely(!n)) 268 emac_report_timeout_error(dev, 269 "RX disable timeout"); 270 } 271 out_be32(&p->mr0, r | EMAC_MR0_RXE); 272 } 273 out: 274 ; 275 } 276 277 static void emac_rx_disable(struct emac_instance *dev) 278 { 279 struct emac_regs __iomem *p = dev->emacp; 280 u32 r; 281 282 DBG(dev, "rx_disable" NL); 283 284 r = in_be32(&p->mr0); 285 if (r & EMAC_MR0_RXE) { 286 int n = dev->stop_timeout; 287 out_be32(&p->mr0, r & ~EMAC_MR0_RXE); 288 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { 289 udelay(1); 290 --n; 291 } 292 if (unlikely(!n)) 293 emac_report_timeout_error(dev, "RX disable timeout"); 294 } 295 } 296 297 static inline void emac_netif_stop(struct emac_instance *dev) 298 { 299 netif_tx_lock_bh(dev->ndev); 300 netif_addr_lock(dev->ndev); 301 dev->no_mcast = 1; 302 netif_addr_unlock(dev->ndev); 303 netif_tx_unlock_bh(dev->ndev); 304 dev->ndev->trans_start = jiffies; /* prevent tx timeout */ 305 mal_poll_disable(dev->mal, &dev->commac); 306 netif_tx_disable(dev->ndev); 307 } 308 309 static inline void emac_netif_start(struct emac_instance *dev) 310 { 311 netif_tx_lock_bh(dev->ndev); 312 netif_addr_lock(dev->ndev); 313 dev->no_mcast = 0; 314 if (dev->mcast_pending && netif_running(dev->ndev)) 315 __emac_set_multicast_list(dev); 316 netif_addr_unlock(dev->ndev); 317 netif_tx_unlock_bh(dev->ndev); 318 319 netif_wake_queue(dev->ndev); 320 321 /* NOTE: unconditional netif_wake_queue is only appropriate 322 * so long as all callers are assured to have free tx slots 323 * (taken from tg3... though the case where that is wrong is 324 * not terribly harmful) 325 */ 326 mal_poll_enable(dev->mal, &dev->commac); 327 } 328 329 static inline void emac_rx_disable_async(struct emac_instance *dev) 330 { 331 struct emac_regs __iomem *p = dev->emacp; 332 u32 r; 333 334 DBG(dev, "rx_disable_async" NL); 335 336 r = in_be32(&p->mr0); 337 if (r & EMAC_MR0_RXE) 338 out_be32(&p->mr0, r & ~EMAC_MR0_RXE); 339 } 340 341 static int emac_reset(struct emac_instance *dev) 342 { 343 struct emac_regs __iomem *p = dev->emacp; 344 int n = 20; 345 346 DBG(dev, "reset" NL); 347 348 if (!dev->reset_failed) { 349 /* 40x erratum suggests stopping RX channel before reset, 350 * we stop TX as well 351 */ 352 emac_rx_disable(dev); 353 emac_tx_disable(dev); 354 } 355 356 #ifdef CONFIG_PPC_DCR_NATIVE 357 /* 358 * PPC460EX/GT Embedded Processor Advanced User's Manual 359 * section 28.10.1 Mode Register 0 (EMACx_MR0) states: 360 * Note: The PHY must provide a TX Clk in order to perform a soft reset 361 * of the EMAC. If none is present, select the internal clock 362 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1). 363 * After a soft reset, select the external clock. 364 */ 365 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { 366 if (dev->phy_address == 0xffffffff && 367 dev->phy_map == 0xffffffff) { 368 /* No PHY: select internal loop clock before reset */ 369 dcri_clrset(SDR0, SDR0_ETH_CFG, 370 0, SDR0_ETH_CFG_ECS << dev->cell_index); 371 } else { 372 /* PHY present: select external clock before reset */ 373 dcri_clrset(SDR0, SDR0_ETH_CFG, 374 SDR0_ETH_CFG_ECS << dev->cell_index, 0); 375 } 376 } 377 #endif 378 379 out_be32(&p->mr0, EMAC_MR0_SRST); 380 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) 381 --n; 382 383 #ifdef CONFIG_PPC_DCR_NATIVE 384 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { 385 if (dev->phy_address == 0xffffffff && 386 dev->phy_map == 0xffffffff) { 387 /* No PHY: restore external clock source after reset */ 388 dcri_clrset(SDR0, SDR0_ETH_CFG, 389 SDR0_ETH_CFG_ECS << dev->cell_index, 0); 390 } 391 } 392 #endif 393 394 if (n) { 395 dev->reset_failed = 0; 396 return 0; 397 } else { 398 emac_report_timeout_error(dev, "reset timeout"); 399 dev->reset_failed = 1; 400 return -ETIMEDOUT; 401 } 402 } 403 404 static void emac_hash_mc(struct emac_instance *dev) 405 { 406 const int regs = EMAC_XAHT_REGS(dev); 407 u32 *gaht_base = emac_gaht_base(dev); 408 u32 gaht_temp[regs]; 409 struct netdev_hw_addr *ha; 410 int i; 411 412 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev)); 413 414 memset(gaht_temp, 0, sizeof (gaht_temp)); 415 416 netdev_for_each_mc_addr(ha, dev->ndev) { 417 int slot, reg, mask; 418 DBG2(dev, "mc %pM" NL, ha->addr); 419 420 slot = EMAC_XAHT_CRC_TO_SLOT(dev, 421 ether_crc(ETH_ALEN, ha->addr)); 422 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot); 423 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot); 424 425 gaht_temp[reg] |= mask; 426 } 427 428 for (i = 0; i < regs; i++) 429 out_be32(gaht_base + i, gaht_temp[i]); 430 } 431 432 static inline u32 emac_iff2rmr(struct net_device *ndev) 433 { 434 struct emac_instance *dev = netdev_priv(ndev); 435 u32 r; 436 437 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE; 438 439 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 440 r |= EMAC4_RMR_BASE; 441 else 442 r |= EMAC_RMR_BASE; 443 444 if (ndev->flags & IFF_PROMISC) 445 r |= EMAC_RMR_PME; 446 else if (ndev->flags & IFF_ALLMULTI || 447 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev))) 448 r |= EMAC_RMR_PMME; 449 else if (!netdev_mc_empty(ndev)) 450 r |= EMAC_RMR_MAE; 451 452 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { 453 r &= ~EMAC4_RMR_MJS_MASK; 454 r |= EMAC4_RMR_MJS(ndev->mtu); 455 } 456 457 return r; 458 } 459 460 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 461 { 462 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT; 463 464 DBG2(dev, "__emac_calc_base_mr1" NL); 465 466 switch(tx_size) { 467 case 2048: 468 ret |= EMAC_MR1_TFS_2K; 469 break; 470 default: 471 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", 472 dev->ndev->name, tx_size); 473 } 474 475 switch(rx_size) { 476 case 16384: 477 ret |= EMAC_MR1_RFS_16K; 478 break; 479 case 4096: 480 ret |= EMAC_MR1_RFS_4K; 481 break; 482 default: 483 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", 484 dev->ndev->name, rx_size); 485 } 486 487 return ret; 488 } 489 490 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 491 { 492 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR | 493 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000); 494 495 DBG2(dev, "__emac4_calc_base_mr1" NL); 496 497 switch(tx_size) { 498 case 16384: 499 ret |= EMAC4_MR1_TFS_16K; 500 break; 501 case 4096: 502 ret |= EMAC4_MR1_TFS_4K; 503 break; 504 case 2048: 505 ret |= EMAC4_MR1_TFS_2K; 506 break; 507 default: 508 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", 509 dev->ndev->name, tx_size); 510 } 511 512 switch(rx_size) { 513 case 16384: 514 ret |= EMAC4_MR1_RFS_16K; 515 break; 516 case 4096: 517 ret |= EMAC4_MR1_RFS_4K; 518 break; 519 case 2048: 520 ret |= EMAC4_MR1_RFS_2K; 521 break; 522 default: 523 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", 524 dev->ndev->name, rx_size); 525 } 526 527 return ret; 528 } 529 530 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 531 { 532 return emac_has_feature(dev, EMAC_FTR_EMAC4) ? 533 __emac4_calc_base_mr1(dev, tx_size, rx_size) : 534 __emac_calc_base_mr1(dev, tx_size, rx_size); 535 } 536 537 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size) 538 { 539 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 540 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4; 541 else 542 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT; 543 } 544 545 static inline u32 emac_calc_rwmr(struct emac_instance *dev, 546 unsigned int low, unsigned int high) 547 { 548 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 549 return (low << 22) | ( (high & 0x3ff) << 6); 550 else 551 return (low << 23) | ( (high & 0x1ff) << 7); 552 } 553 554 static int emac_configure(struct emac_instance *dev) 555 { 556 struct emac_regs __iomem *p = dev->emacp; 557 struct net_device *ndev = dev->ndev; 558 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev); 559 u32 r, mr1 = 0; 560 561 DBG(dev, "configure" NL); 562 563 if (!link) { 564 out_be32(&p->mr1, in_be32(&p->mr1) 565 | EMAC_MR1_FDE | EMAC_MR1_ILE); 566 udelay(100); 567 } else if (emac_reset(dev) < 0) 568 return -ETIMEDOUT; 569 570 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 571 tah_reset(dev->tah_dev); 572 573 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n", 574 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause); 575 576 /* Default fifo sizes */ 577 tx_size = dev->tx_fifo_size; 578 rx_size = dev->rx_fifo_size; 579 580 /* No link, force loopback */ 581 if (!link) 582 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE; 583 584 /* Check for full duplex */ 585 else if (dev->phy.duplex == DUPLEX_FULL) 586 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; 587 588 /* Adjust fifo sizes, mr1 and timeouts based on link speed */ 589 dev->stop_timeout = STOP_TIMEOUT_10; 590 switch (dev->phy.speed) { 591 case SPEED_1000: 592 if (emac_phy_gpcs(dev->phy.mode)) { 593 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA( 594 (dev->phy.gpcs_address != 0xffffffff) ? 595 dev->phy.gpcs_address : dev->phy.address); 596 597 /* Put some arbitrary OUI, Manuf & Rev IDs so we can 598 * identify this GPCS PHY later. 599 */ 600 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef); 601 } else 602 mr1 |= EMAC_MR1_MF_1000; 603 604 /* Extended fifo sizes */ 605 tx_size = dev->tx_fifo_size_gige; 606 rx_size = dev->rx_fifo_size_gige; 607 608 if (dev->ndev->mtu > ETH_DATA_LEN) { 609 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 610 mr1 |= EMAC4_MR1_JPSM; 611 else 612 mr1 |= EMAC_MR1_JPSM; 613 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; 614 } else 615 dev->stop_timeout = STOP_TIMEOUT_1000; 616 break; 617 case SPEED_100: 618 mr1 |= EMAC_MR1_MF_100; 619 dev->stop_timeout = STOP_TIMEOUT_100; 620 break; 621 default: /* make gcc happy */ 622 break; 623 } 624 625 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 626 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port, 627 dev->phy.speed); 628 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 629 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed); 630 631 /* on 40x erratum forces us to NOT use integrated flow control, 632 * let's hope it works on 44x ;) 633 */ 634 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) && 635 dev->phy.duplex == DUPLEX_FULL) { 636 if (dev->phy.pause) 637 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP; 638 else if (dev->phy.asym_pause) 639 mr1 |= EMAC_MR1_APP; 640 } 641 642 /* Add base settings & fifo sizes & program MR1 */ 643 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size); 644 out_be32(&p->mr1, mr1); 645 646 /* Set individual MAC address */ 647 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); 648 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | 649 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | 650 ndev->dev_addr[5]); 651 652 /* VLAN Tag Protocol ID */ 653 out_be32(&p->vtpid, 0x8100); 654 655 /* Receive mode register */ 656 r = emac_iff2rmr(ndev); 657 if (r & EMAC_RMR_MAE) 658 emac_hash_mc(dev); 659 out_be32(&p->rmr, r); 660 661 /* FIFOs thresholds */ 662 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 663 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, 664 tx_size / 2 / dev->fifo_entry_size); 665 else 666 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, 667 tx_size / 2 / dev->fifo_entry_size); 668 out_be32(&p->tmr1, r); 669 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2)); 670 671 /* PAUSE frame is sent when RX FIFO reaches its high-water mark, 672 there should be still enough space in FIFO to allow the our link 673 partner time to process this frame and also time to send PAUSE 674 frame itself. 675 676 Here is the worst case scenario for the RX FIFO "headroom" 677 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): 678 679 1) One maximum-length frame on TX 1522 bytes 680 2) One PAUSE frame time 64 bytes 681 3) PAUSE frame decode time allowance 64 bytes 682 4) One maximum-length frame on RX 1522 bytes 683 5) Round-trip propagation delay of the link (100Mb) 15 bytes 684 ---------- 685 3187 bytes 686 687 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) 688 low-water mark to RX_FIFO_SIZE / 8 (512 bytes) 689 */ 690 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size, 691 rx_size / 4 / dev->fifo_entry_size); 692 out_be32(&p->rwmr, r); 693 694 /* Set PAUSE timer to the maximum */ 695 out_be32(&p->ptr, 0xffff); 696 697 /* IRQ sources */ 698 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | 699 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | 700 EMAC_ISR_IRE | EMAC_ISR_TE; 701 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 702 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE | 703 EMAC4_ISR_RXOE | */; 704 out_be32(&p->iser, r); 705 706 /* We need to take GPCS PHY out of isolate mode after EMAC reset */ 707 if (emac_phy_gpcs(dev->phy.mode)) { 708 if (dev->phy.gpcs_address != 0xffffffff) 709 emac_mii_reset_gpcs(&dev->phy); 710 else 711 emac_mii_reset_phy(&dev->phy); 712 } 713 714 return 0; 715 } 716 717 static void emac_reinitialize(struct emac_instance *dev) 718 { 719 DBG(dev, "reinitialize" NL); 720 721 emac_netif_stop(dev); 722 if (!emac_configure(dev)) { 723 emac_tx_enable(dev); 724 emac_rx_enable(dev); 725 } 726 emac_netif_start(dev); 727 } 728 729 static void emac_full_tx_reset(struct emac_instance *dev) 730 { 731 DBG(dev, "full_tx_reset" NL); 732 733 emac_tx_disable(dev); 734 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); 735 emac_clean_tx_ring(dev); 736 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; 737 738 emac_configure(dev); 739 740 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); 741 emac_tx_enable(dev); 742 emac_rx_enable(dev); 743 } 744 745 static void emac_reset_work(struct work_struct *work) 746 { 747 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work); 748 749 DBG(dev, "reset_work" NL); 750 751 mutex_lock(&dev->link_lock); 752 if (dev->opened) { 753 emac_netif_stop(dev); 754 emac_full_tx_reset(dev); 755 emac_netif_start(dev); 756 } 757 mutex_unlock(&dev->link_lock); 758 } 759 760 static void emac_tx_timeout(struct net_device *ndev) 761 { 762 struct emac_instance *dev = netdev_priv(ndev); 763 764 DBG(dev, "tx_timeout" NL); 765 766 schedule_work(&dev->reset_work); 767 } 768 769 770 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr) 771 { 772 int done = !!(stacr & EMAC_STACR_OC); 773 774 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 775 done = !done; 776 777 return done; 778 }; 779 780 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg) 781 { 782 struct emac_regs __iomem *p = dev->emacp; 783 u32 r = 0; 784 int n, err = -ETIMEDOUT; 785 786 mutex_lock(&dev->mdio_lock); 787 788 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg); 789 790 /* Enable proper MDIO port */ 791 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 792 zmii_get_mdio(dev->zmii_dev, dev->zmii_port); 793 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 794 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); 795 796 /* Wait for management interface to become idle */ 797 n = 20; 798 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 799 udelay(1); 800 if (!--n) { 801 DBG2(dev, " -> timeout wait idle\n"); 802 goto bail; 803 } 804 } 805 806 /* Issue read command */ 807 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 808 r = EMAC4_STACR_BASE(dev->opb_bus_freq); 809 else 810 r = EMAC_STACR_BASE(dev->opb_bus_freq); 811 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 812 r |= EMAC_STACR_OC; 813 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) 814 r |= EMACX_STACR_STAC_READ; 815 else 816 r |= EMAC_STACR_STAC_READ; 817 r |= (reg & EMAC_STACR_PRA_MASK) 818 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT); 819 out_be32(&p->stacr, r); 820 821 /* Wait for read to complete */ 822 n = 200; 823 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) { 824 udelay(1); 825 if (!--n) { 826 DBG2(dev, " -> timeout wait complete\n"); 827 goto bail; 828 } 829 } 830 831 if (unlikely(r & EMAC_STACR_PHYE)) { 832 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg); 833 err = -EREMOTEIO; 834 goto bail; 835 } 836 837 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); 838 839 DBG2(dev, "mdio_read -> %04x" NL, r); 840 err = 0; 841 bail: 842 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 843 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); 844 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 845 zmii_put_mdio(dev->zmii_dev, dev->zmii_port); 846 mutex_unlock(&dev->mdio_lock); 847 848 return err == 0 ? r : err; 849 } 850 851 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg, 852 u16 val) 853 { 854 struct emac_regs __iomem *p = dev->emacp; 855 u32 r = 0; 856 int n, err = -ETIMEDOUT; 857 858 mutex_lock(&dev->mdio_lock); 859 860 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val); 861 862 /* Enable proper MDIO port */ 863 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 864 zmii_get_mdio(dev->zmii_dev, dev->zmii_port); 865 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 866 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); 867 868 /* Wait for management interface to be idle */ 869 n = 20; 870 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 871 udelay(1); 872 if (!--n) { 873 DBG2(dev, " -> timeout wait idle\n"); 874 goto bail; 875 } 876 } 877 878 /* Issue write command */ 879 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 880 r = EMAC4_STACR_BASE(dev->opb_bus_freq); 881 else 882 r = EMAC_STACR_BASE(dev->opb_bus_freq); 883 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 884 r |= EMAC_STACR_OC; 885 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) 886 r |= EMACX_STACR_STAC_WRITE; 887 else 888 r |= EMAC_STACR_STAC_WRITE; 889 r |= (reg & EMAC_STACR_PRA_MASK) | 890 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | 891 (val << EMAC_STACR_PHYD_SHIFT); 892 out_be32(&p->stacr, r); 893 894 /* Wait for write to complete */ 895 n = 200; 896 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 897 udelay(1); 898 if (!--n) { 899 DBG2(dev, " -> timeout wait complete\n"); 900 goto bail; 901 } 902 } 903 err = 0; 904 bail: 905 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 906 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); 907 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 908 zmii_put_mdio(dev->zmii_dev, dev->zmii_port); 909 mutex_unlock(&dev->mdio_lock); 910 } 911 912 static int emac_mdio_read(struct net_device *ndev, int id, int reg) 913 { 914 struct emac_instance *dev = netdev_priv(ndev); 915 int res; 916 917 res = __emac_mdio_read((dev->mdio_instance && 918 dev->phy.gpcs_address != id) ? 919 dev->mdio_instance : dev, 920 (u8) id, (u8) reg); 921 return res; 922 } 923 924 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) 925 { 926 struct emac_instance *dev = netdev_priv(ndev); 927 928 __emac_mdio_write((dev->mdio_instance && 929 dev->phy.gpcs_address != id) ? 930 dev->mdio_instance : dev, 931 (u8) id, (u8) reg, (u16) val); 932 } 933 934 /* Tx lock BH */ 935 static void __emac_set_multicast_list(struct emac_instance *dev) 936 { 937 struct emac_regs __iomem *p = dev->emacp; 938 u32 rmr = emac_iff2rmr(dev->ndev); 939 940 DBG(dev, "__multicast %08x" NL, rmr); 941 942 /* I decided to relax register access rules here to avoid 943 * full EMAC reset. 944 * 945 * There is a real problem with EMAC4 core if we use MWSW_001 bit 946 * in MR1 register and do a full EMAC reset. 947 * One TX BD status update is delayed and, after EMAC reset, it 948 * never happens, resulting in TX hung (it'll be recovered by TX 949 * timeout handler eventually, but this is just gross). 950 * So we either have to do full TX reset or try to cheat here :) 951 * 952 * The only required change is to RX mode register, so I *think* all 953 * we need is just to stop RX channel. This seems to work on all 954 * tested SoCs. --ebs 955 * 956 * If we need the full reset, we might just trigger the workqueue 957 * and do it async... a bit nasty but should work --BenH 958 */ 959 dev->mcast_pending = 0; 960 emac_rx_disable(dev); 961 if (rmr & EMAC_RMR_MAE) 962 emac_hash_mc(dev); 963 out_be32(&p->rmr, rmr); 964 emac_rx_enable(dev); 965 } 966 967 /* Tx lock BH */ 968 static void emac_set_multicast_list(struct net_device *ndev) 969 { 970 struct emac_instance *dev = netdev_priv(ndev); 971 972 DBG(dev, "multicast" NL); 973 974 BUG_ON(!netif_running(dev->ndev)); 975 976 if (dev->no_mcast) { 977 dev->mcast_pending = 1; 978 return; 979 } 980 __emac_set_multicast_list(dev); 981 } 982 983 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) 984 { 985 int rx_sync_size = emac_rx_sync_size(new_mtu); 986 int rx_skb_size = emac_rx_skb_size(new_mtu); 987 int i, ret = 0; 988 int mr1_jumbo_bit_change = 0; 989 990 mutex_lock(&dev->link_lock); 991 emac_netif_stop(dev); 992 emac_rx_disable(dev); 993 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); 994 995 if (dev->rx_sg_skb) { 996 ++dev->estats.rx_dropped_resize; 997 dev_kfree_skb(dev->rx_sg_skb); 998 dev->rx_sg_skb = NULL; 999 } 1000 1001 /* Make a first pass over RX ring and mark BDs ready, dropping 1002 * non-processed packets on the way. We need this as a separate pass 1003 * to simplify error recovery in the case of allocation failure later. 1004 */ 1005 for (i = 0; i < NUM_RX_BUFF; ++i) { 1006 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) 1007 ++dev->estats.rx_dropped_resize; 1008 1009 dev->rx_desc[i].data_len = 0; 1010 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | 1011 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1012 } 1013 1014 /* Reallocate RX ring only if bigger skb buffers are required */ 1015 if (rx_skb_size <= dev->rx_skb_size) 1016 goto skip; 1017 1018 /* Second pass, allocate new skbs */ 1019 for (i = 0; i < NUM_RX_BUFF; ++i) { 1020 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); 1021 if (!skb) { 1022 ret = -ENOMEM; 1023 goto oom; 1024 } 1025 1026 BUG_ON(!dev->rx_skb[i]); 1027 dev_kfree_skb(dev->rx_skb[i]); 1028 1029 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); 1030 dev->rx_desc[i].data_ptr = 1031 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size, 1032 DMA_FROM_DEVICE) + 2; 1033 dev->rx_skb[i] = skb; 1034 } 1035 skip: 1036 /* Check if we need to change "Jumbo" bit in MR1 */ 1037 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { 1038 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) || 1039 (dev->ndev->mtu > ETH_DATA_LEN); 1040 } else { 1041 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^ 1042 (dev->ndev->mtu > ETH_DATA_LEN); 1043 } 1044 1045 if (mr1_jumbo_bit_change) { 1046 /* This is to prevent starting RX channel in emac_rx_enable() */ 1047 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1048 1049 dev->ndev->mtu = new_mtu; 1050 emac_full_tx_reset(dev); 1051 } 1052 1053 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu)); 1054 oom: 1055 /* Restart RX */ 1056 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1057 dev->rx_slot = 0; 1058 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1059 emac_rx_enable(dev); 1060 emac_netif_start(dev); 1061 mutex_unlock(&dev->link_lock); 1062 1063 return ret; 1064 } 1065 1066 /* Process ctx, rtnl_lock semaphore */ 1067 static int emac_change_mtu(struct net_device *ndev, int new_mtu) 1068 { 1069 struct emac_instance *dev = netdev_priv(ndev); 1070 int ret = 0; 1071 1072 if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu) 1073 return -EINVAL; 1074 1075 DBG(dev, "change_mtu(%d)" NL, new_mtu); 1076 1077 if (netif_running(ndev)) { 1078 /* Check if we really need to reinitialize RX ring */ 1079 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) 1080 ret = emac_resize_rx_ring(dev, new_mtu); 1081 } 1082 1083 if (!ret) { 1084 ndev->mtu = new_mtu; 1085 dev->rx_skb_size = emac_rx_skb_size(new_mtu); 1086 dev->rx_sync_size = emac_rx_sync_size(new_mtu); 1087 } 1088 1089 return ret; 1090 } 1091 1092 static void emac_clean_tx_ring(struct emac_instance *dev) 1093 { 1094 int i; 1095 1096 for (i = 0; i < NUM_TX_BUFF; ++i) { 1097 if (dev->tx_skb[i]) { 1098 dev_kfree_skb(dev->tx_skb[i]); 1099 dev->tx_skb[i] = NULL; 1100 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) 1101 ++dev->estats.tx_dropped; 1102 } 1103 dev->tx_desc[i].ctrl = 0; 1104 dev->tx_desc[i].data_ptr = 0; 1105 } 1106 } 1107 1108 static void emac_clean_rx_ring(struct emac_instance *dev) 1109 { 1110 int i; 1111 1112 for (i = 0; i < NUM_RX_BUFF; ++i) 1113 if (dev->rx_skb[i]) { 1114 dev->rx_desc[i].ctrl = 0; 1115 dev_kfree_skb(dev->rx_skb[i]); 1116 dev->rx_skb[i] = NULL; 1117 dev->rx_desc[i].data_ptr = 0; 1118 } 1119 1120 if (dev->rx_sg_skb) { 1121 dev_kfree_skb(dev->rx_sg_skb); 1122 dev->rx_sg_skb = NULL; 1123 } 1124 } 1125 1126 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot, 1127 gfp_t flags) 1128 { 1129 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); 1130 if (unlikely(!skb)) 1131 return -ENOMEM; 1132 1133 dev->rx_skb[slot] = skb; 1134 dev->rx_desc[slot].data_len = 0; 1135 1136 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); 1137 dev->rx_desc[slot].data_ptr = 1138 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size, 1139 DMA_FROM_DEVICE) + 2; 1140 wmb(); 1141 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | 1142 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1143 1144 return 0; 1145 } 1146 1147 static void emac_print_link_status(struct emac_instance *dev) 1148 { 1149 if (netif_carrier_ok(dev->ndev)) 1150 printk(KERN_INFO "%s: link is up, %d %s%s\n", 1151 dev->ndev->name, dev->phy.speed, 1152 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", 1153 dev->phy.pause ? ", pause enabled" : 1154 dev->phy.asym_pause ? ", asymmetric pause enabled" : ""); 1155 else 1156 printk(KERN_INFO "%s: link is down\n", dev->ndev->name); 1157 } 1158 1159 /* Process ctx, rtnl_lock semaphore */ 1160 static int emac_open(struct net_device *ndev) 1161 { 1162 struct emac_instance *dev = netdev_priv(ndev); 1163 int err, i; 1164 1165 DBG(dev, "open" NL); 1166 1167 /* Setup error IRQ handler */ 1168 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev); 1169 if (err) { 1170 printk(KERN_ERR "%s: failed to request IRQ %d\n", 1171 ndev->name, dev->emac_irq); 1172 return err; 1173 } 1174 1175 /* Allocate RX ring */ 1176 for (i = 0; i < NUM_RX_BUFF; ++i) 1177 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { 1178 printk(KERN_ERR "%s: failed to allocate RX ring\n", 1179 ndev->name); 1180 goto oom; 1181 } 1182 1183 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0; 1184 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1185 dev->rx_sg_skb = NULL; 1186 1187 mutex_lock(&dev->link_lock); 1188 dev->opened = 1; 1189 1190 /* Start PHY polling now. 1191 */ 1192 if (dev->phy.address >= 0) { 1193 int link_poll_interval; 1194 if (dev->phy.def->ops->poll_link(&dev->phy)) { 1195 dev->phy.def->ops->read_link(&dev->phy); 1196 emac_rx_clk_default(dev); 1197 netif_carrier_on(dev->ndev); 1198 link_poll_interval = PHY_POLL_LINK_ON; 1199 } else { 1200 emac_rx_clk_tx(dev); 1201 netif_carrier_off(dev->ndev); 1202 link_poll_interval = PHY_POLL_LINK_OFF; 1203 } 1204 dev->link_polling = 1; 1205 wmb(); 1206 schedule_delayed_work(&dev->link_work, link_poll_interval); 1207 emac_print_link_status(dev); 1208 } else 1209 netif_carrier_on(dev->ndev); 1210 1211 /* Required for Pause packet support in EMAC */ 1212 dev_mc_add_global(ndev, default_mcast_addr); 1213 1214 emac_configure(dev); 1215 mal_poll_add(dev->mal, &dev->commac); 1216 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); 1217 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu)); 1218 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1219 emac_tx_enable(dev); 1220 emac_rx_enable(dev); 1221 emac_netif_start(dev); 1222 1223 mutex_unlock(&dev->link_lock); 1224 1225 return 0; 1226 oom: 1227 emac_clean_rx_ring(dev); 1228 free_irq(dev->emac_irq, dev); 1229 1230 return -ENOMEM; 1231 } 1232 1233 /* BHs disabled */ 1234 #if 0 1235 static int emac_link_differs(struct emac_instance *dev) 1236 { 1237 u32 r = in_be32(&dev->emacp->mr1); 1238 1239 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; 1240 int speed, pause, asym_pause; 1241 1242 if (r & EMAC_MR1_MF_1000) 1243 speed = SPEED_1000; 1244 else if (r & EMAC_MR1_MF_100) 1245 speed = SPEED_100; 1246 else 1247 speed = SPEED_10; 1248 1249 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { 1250 case (EMAC_MR1_EIFC | EMAC_MR1_APP): 1251 pause = 1; 1252 asym_pause = 0; 1253 break; 1254 case EMAC_MR1_APP: 1255 pause = 0; 1256 asym_pause = 1; 1257 break; 1258 default: 1259 pause = asym_pause = 0; 1260 } 1261 return speed != dev->phy.speed || duplex != dev->phy.duplex || 1262 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; 1263 } 1264 #endif 1265 1266 static void emac_link_timer(struct work_struct *work) 1267 { 1268 struct emac_instance *dev = 1269 container_of(to_delayed_work(work), 1270 struct emac_instance, link_work); 1271 int link_poll_interval; 1272 1273 mutex_lock(&dev->link_lock); 1274 DBG2(dev, "link timer" NL); 1275 1276 if (!dev->opened) 1277 goto bail; 1278 1279 if (dev->phy.def->ops->poll_link(&dev->phy)) { 1280 if (!netif_carrier_ok(dev->ndev)) { 1281 emac_rx_clk_default(dev); 1282 /* Get new link parameters */ 1283 dev->phy.def->ops->read_link(&dev->phy); 1284 1285 netif_carrier_on(dev->ndev); 1286 emac_netif_stop(dev); 1287 emac_full_tx_reset(dev); 1288 emac_netif_start(dev); 1289 emac_print_link_status(dev); 1290 } 1291 link_poll_interval = PHY_POLL_LINK_ON; 1292 } else { 1293 if (netif_carrier_ok(dev->ndev)) { 1294 emac_rx_clk_tx(dev); 1295 netif_carrier_off(dev->ndev); 1296 netif_tx_disable(dev->ndev); 1297 emac_reinitialize(dev); 1298 emac_print_link_status(dev); 1299 } 1300 link_poll_interval = PHY_POLL_LINK_OFF; 1301 } 1302 schedule_delayed_work(&dev->link_work, link_poll_interval); 1303 bail: 1304 mutex_unlock(&dev->link_lock); 1305 } 1306 1307 static void emac_force_link_update(struct emac_instance *dev) 1308 { 1309 netif_carrier_off(dev->ndev); 1310 smp_rmb(); 1311 if (dev->link_polling) { 1312 cancel_delayed_work_sync(&dev->link_work); 1313 if (dev->link_polling) 1314 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF); 1315 } 1316 } 1317 1318 /* Process ctx, rtnl_lock semaphore */ 1319 static int emac_close(struct net_device *ndev) 1320 { 1321 struct emac_instance *dev = netdev_priv(ndev); 1322 1323 DBG(dev, "close" NL); 1324 1325 if (dev->phy.address >= 0) { 1326 dev->link_polling = 0; 1327 cancel_delayed_work_sync(&dev->link_work); 1328 } 1329 mutex_lock(&dev->link_lock); 1330 emac_netif_stop(dev); 1331 dev->opened = 0; 1332 mutex_unlock(&dev->link_lock); 1333 1334 emac_rx_disable(dev); 1335 emac_tx_disable(dev); 1336 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); 1337 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); 1338 mal_poll_del(dev->mal, &dev->commac); 1339 1340 emac_clean_tx_ring(dev); 1341 emac_clean_rx_ring(dev); 1342 1343 free_irq(dev->emac_irq, dev); 1344 1345 netif_carrier_off(ndev); 1346 1347 return 0; 1348 } 1349 1350 static inline u16 emac_tx_csum(struct emac_instance *dev, 1351 struct sk_buff *skb) 1352 { 1353 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && 1354 (skb->ip_summed == CHECKSUM_PARTIAL)) { 1355 ++dev->stats.tx_packets_csum; 1356 return EMAC_TX_CTRL_TAH_CSUM; 1357 } 1358 return 0; 1359 } 1360 1361 static inline int emac_xmit_finish(struct emac_instance *dev, int len) 1362 { 1363 struct emac_regs __iomem *p = dev->emacp; 1364 struct net_device *ndev = dev->ndev; 1365 1366 /* Send the packet out. If the if makes a significant perf 1367 * difference, then we can store the TMR0 value in "dev" 1368 * instead 1369 */ 1370 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 1371 out_be32(&p->tmr0, EMAC4_TMR0_XMIT); 1372 else 1373 out_be32(&p->tmr0, EMAC_TMR0_XMIT); 1374 1375 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { 1376 netif_stop_queue(ndev); 1377 DBG2(dev, "stopped TX queue" NL); 1378 } 1379 1380 ndev->trans_start = jiffies; 1381 ++dev->stats.tx_packets; 1382 dev->stats.tx_bytes += len; 1383 1384 return NETDEV_TX_OK; 1385 } 1386 1387 /* Tx lock BH */ 1388 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1389 { 1390 struct emac_instance *dev = netdev_priv(ndev); 1391 unsigned int len = skb->len; 1392 int slot; 1393 1394 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | 1395 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); 1396 1397 slot = dev->tx_slot++; 1398 if (dev->tx_slot == NUM_TX_BUFF) { 1399 dev->tx_slot = 0; 1400 ctrl |= MAL_TX_CTRL_WRAP; 1401 } 1402 1403 DBG2(dev, "xmit(%u) %d" NL, len, slot); 1404 1405 dev->tx_skb[slot] = skb; 1406 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev, 1407 skb->data, len, 1408 DMA_TO_DEVICE); 1409 dev->tx_desc[slot].data_len = (u16) len; 1410 wmb(); 1411 dev->tx_desc[slot].ctrl = ctrl; 1412 1413 return emac_xmit_finish(dev, len); 1414 } 1415 1416 static inline int emac_xmit_split(struct emac_instance *dev, int slot, 1417 u32 pd, int len, int last, u16 base_ctrl) 1418 { 1419 while (1) { 1420 u16 ctrl = base_ctrl; 1421 int chunk = min(len, MAL_MAX_TX_SIZE); 1422 len -= chunk; 1423 1424 slot = (slot + 1) % NUM_TX_BUFF; 1425 1426 if (last && !len) 1427 ctrl |= MAL_TX_CTRL_LAST; 1428 if (slot == NUM_TX_BUFF - 1) 1429 ctrl |= MAL_TX_CTRL_WRAP; 1430 1431 dev->tx_skb[slot] = NULL; 1432 dev->tx_desc[slot].data_ptr = pd; 1433 dev->tx_desc[slot].data_len = (u16) chunk; 1434 dev->tx_desc[slot].ctrl = ctrl; 1435 ++dev->tx_cnt; 1436 1437 if (!len) 1438 break; 1439 1440 pd += chunk; 1441 } 1442 return slot; 1443 } 1444 1445 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */ 1446 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) 1447 { 1448 struct emac_instance *dev = netdev_priv(ndev); 1449 int nr_frags = skb_shinfo(skb)->nr_frags; 1450 int len = skb->len, chunk; 1451 int slot, i; 1452 u16 ctrl; 1453 u32 pd; 1454 1455 /* This is common "fast" path */ 1456 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) 1457 return emac_start_xmit(skb, ndev); 1458 1459 len -= skb->data_len; 1460 1461 /* Note, this is only an *estimation*, we can still run out of empty 1462 * slots because of the additional fragmentation into 1463 * MAL_MAX_TX_SIZE-sized chunks 1464 */ 1465 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) 1466 goto stop_queue; 1467 1468 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | 1469 emac_tx_csum(dev, skb); 1470 slot = dev->tx_slot; 1471 1472 /* skb data */ 1473 dev->tx_skb[slot] = NULL; 1474 chunk = min(len, MAL_MAX_TX_SIZE); 1475 dev->tx_desc[slot].data_ptr = pd = 1476 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE); 1477 dev->tx_desc[slot].data_len = (u16) chunk; 1478 len -= chunk; 1479 if (unlikely(len)) 1480 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, 1481 ctrl); 1482 /* skb fragments */ 1483 for (i = 0; i < nr_frags; ++i) { 1484 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 1485 len = skb_frag_size(frag); 1486 1487 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) 1488 goto undo_frame; 1489 1490 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len, 1491 DMA_TO_DEVICE); 1492 1493 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, 1494 ctrl); 1495 } 1496 1497 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot); 1498 1499 /* Attach skb to the last slot so we don't release it too early */ 1500 dev->tx_skb[slot] = skb; 1501 1502 /* Send the packet out */ 1503 if (dev->tx_slot == NUM_TX_BUFF - 1) 1504 ctrl |= MAL_TX_CTRL_WRAP; 1505 wmb(); 1506 dev->tx_desc[dev->tx_slot].ctrl = ctrl; 1507 dev->tx_slot = (slot + 1) % NUM_TX_BUFF; 1508 1509 return emac_xmit_finish(dev, skb->len); 1510 1511 undo_frame: 1512 /* Well, too bad. Our previous estimation was overly optimistic. 1513 * Undo everything. 1514 */ 1515 while (slot != dev->tx_slot) { 1516 dev->tx_desc[slot].ctrl = 0; 1517 --dev->tx_cnt; 1518 if (--slot < 0) 1519 slot = NUM_TX_BUFF - 1; 1520 } 1521 ++dev->estats.tx_undo; 1522 1523 stop_queue: 1524 netif_stop_queue(ndev); 1525 DBG2(dev, "stopped TX queue" NL); 1526 return NETDEV_TX_BUSY; 1527 } 1528 1529 /* Tx lock BHs */ 1530 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) 1531 { 1532 struct emac_error_stats *st = &dev->estats; 1533 1534 DBG(dev, "BD TX error %04x" NL, ctrl); 1535 1536 ++st->tx_bd_errors; 1537 if (ctrl & EMAC_TX_ST_BFCS) 1538 ++st->tx_bd_bad_fcs; 1539 if (ctrl & EMAC_TX_ST_LCS) 1540 ++st->tx_bd_carrier_loss; 1541 if (ctrl & EMAC_TX_ST_ED) 1542 ++st->tx_bd_excessive_deferral; 1543 if (ctrl & EMAC_TX_ST_EC) 1544 ++st->tx_bd_excessive_collisions; 1545 if (ctrl & EMAC_TX_ST_LC) 1546 ++st->tx_bd_late_collision; 1547 if (ctrl & EMAC_TX_ST_MC) 1548 ++st->tx_bd_multple_collisions; 1549 if (ctrl & EMAC_TX_ST_SC) 1550 ++st->tx_bd_single_collision; 1551 if (ctrl & EMAC_TX_ST_UR) 1552 ++st->tx_bd_underrun; 1553 if (ctrl & EMAC_TX_ST_SQE) 1554 ++st->tx_bd_sqe; 1555 } 1556 1557 static void emac_poll_tx(void *param) 1558 { 1559 struct emac_instance *dev = param; 1560 u32 bad_mask; 1561 1562 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot); 1563 1564 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 1565 bad_mask = EMAC_IS_BAD_TX_TAH; 1566 else 1567 bad_mask = EMAC_IS_BAD_TX; 1568 1569 netif_tx_lock_bh(dev->ndev); 1570 if (dev->tx_cnt) { 1571 u16 ctrl; 1572 int slot = dev->ack_slot, n = 0; 1573 again: 1574 ctrl = dev->tx_desc[slot].ctrl; 1575 if (!(ctrl & MAL_TX_CTRL_READY)) { 1576 struct sk_buff *skb = dev->tx_skb[slot]; 1577 ++n; 1578 1579 if (skb) { 1580 dev_kfree_skb(skb); 1581 dev->tx_skb[slot] = NULL; 1582 } 1583 slot = (slot + 1) % NUM_TX_BUFF; 1584 1585 if (unlikely(ctrl & bad_mask)) 1586 emac_parse_tx_error(dev, ctrl); 1587 1588 if (--dev->tx_cnt) 1589 goto again; 1590 } 1591 if (n) { 1592 dev->ack_slot = slot; 1593 if (netif_queue_stopped(dev->ndev) && 1594 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) 1595 netif_wake_queue(dev->ndev); 1596 1597 DBG2(dev, "tx %d pkts" NL, n); 1598 } 1599 } 1600 netif_tx_unlock_bh(dev->ndev); 1601 } 1602 1603 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot, 1604 int len) 1605 { 1606 struct sk_buff *skb = dev->rx_skb[slot]; 1607 1608 DBG2(dev, "recycle %d %d" NL, slot, len); 1609 1610 if (len) 1611 dma_map_single(&dev->ofdev->dev, skb->data - 2, 1612 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); 1613 1614 dev->rx_desc[slot].data_len = 0; 1615 wmb(); 1616 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | 1617 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1618 } 1619 1620 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl) 1621 { 1622 struct emac_error_stats *st = &dev->estats; 1623 1624 DBG(dev, "BD RX error %04x" NL, ctrl); 1625 1626 ++st->rx_bd_errors; 1627 if (ctrl & EMAC_RX_ST_OE) 1628 ++st->rx_bd_overrun; 1629 if (ctrl & EMAC_RX_ST_BP) 1630 ++st->rx_bd_bad_packet; 1631 if (ctrl & EMAC_RX_ST_RP) 1632 ++st->rx_bd_runt_packet; 1633 if (ctrl & EMAC_RX_ST_SE) 1634 ++st->rx_bd_short_event; 1635 if (ctrl & EMAC_RX_ST_AE) 1636 ++st->rx_bd_alignment_error; 1637 if (ctrl & EMAC_RX_ST_BFCS) 1638 ++st->rx_bd_bad_fcs; 1639 if (ctrl & EMAC_RX_ST_PTL) 1640 ++st->rx_bd_packet_too_long; 1641 if (ctrl & EMAC_RX_ST_ORE) 1642 ++st->rx_bd_out_of_range; 1643 if (ctrl & EMAC_RX_ST_IRE) 1644 ++st->rx_bd_in_range; 1645 } 1646 1647 static inline void emac_rx_csum(struct emac_instance *dev, 1648 struct sk_buff *skb, u16 ctrl) 1649 { 1650 #ifdef CONFIG_IBM_EMAC_TAH 1651 if (!ctrl && dev->tah_dev) { 1652 skb->ip_summed = CHECKSUM_UNNECESSARY; 1653 ++dev->stats.rx_packets_csum; 1654 } 1655 #endif 1656 } 1657 1658 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) 1659 { 1660 if (likely(dev->rx_sg_skb != NULL)) { 1661 int len = dev->rx_desc[slot].data_len; 1662 int tot_len = dev->rx_sg_skb->len + len; 1663 1664 if (unlikely(tot_len + 2 > dev->rx_skb_size)) { 1665 ++dev->estats.rx_dropped_mtu; 1666 dev_kfree_skb(dev->rx_sg_skb); 1667 dev->rx_sg_skb = NULL; 1668 } else { 1669 memcpy(skb_tail_pointer(dev->rx_sg_skb), 1670 dev->rx_skb[slot]->data, len); 1671 skb_put(dev->rx_sg_skb, len); 1672 emac_recycle_rx_skb(dev, slot, len); 1673 return 0; 1674 } 1675 } 1676 emac_recycle_rx_skb(dev, slot, 0); 1677 return -1; 1678 } 1679 1680 /* NAPI poll context */ 1681 static int emac_poll_rx(void *param, int budget) 1682 { 1683 struct emac_instance *dev = param; 1684 int slot = dev->rx_slot, received = 0; 1685 1686 DBG2(dev, "poll_rx(%d)" NL, budget); 1687 1688 again: 1689 while (budget > 0) { 1690 int len; 1691 struct sk_buff *skb; 1692 u16 ctrl = dev->rx_desc[slot].ctrl; 1693 1694 if (ctrl & MAL_RX_CTRL_EMPTY) 1695 break; 1696 1697 skb = dev->rx_skb[slot]; 1698 mb(); 1699 len = dev->rx_desc[slot].data_len; 1700 1701 if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) 1702 goto sg; 1703 1704 ctrl &= EMAC_BAD_RX_MASK; 1705 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { 1706 emac_parse_rx_error(dev, ctrl); 1707 ++dev->estats.rx_dropped_error; 1708 emac_recycle_rx_skb(dev, slot, 0); 1709 len = 0; 1710 goto next; 1711 } 1712 1713 if (len < ETH_HLEN) { 1714 ++dev->estats.rx_dropped_stack; 1715 emac_recycle_rx_skb(dev, slot, len); 1716 goto next; 1717 } 1718 1719 if (len && len < EMAC_RX_COPY_THRESH) { 1720 struct sk_buff *copy_skb = 1721 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); 1722 if (unlikely(!copy_skb)) 1723 goto oom; 1724 1725 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); 1726 memcpy(copy_skb->data - 2, skb->data - 2, len + 2); 1727 emac_recycle_rx_skb(dev, slot, len); 1728 skb = copy_skb; 1729 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) 1730 goto oom; 1731 1732 skb_put(skb, len); 1733 push_packet: 1734 skb->protocol = eth_type_trans(skb, dev->ndev); 1735 emac_rx_csum(dev, skb, ctrl); 1736 1737 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) 1738 ++dev->estats.rx_dropped_stack; 1739 next: 1740 ++dev->stats.rx_packets; 1741 skip: 1742 dev->stats.rx_bytes += len; 1743 slot = (slot + 1) % NUM_RX_BUFF; 1744 --budget; 1745 ++received; 1746 continue; 1747 sg: 1748 if (ctrl & MAL_RX_CTRL_FIRST) { 1749 BUG_ON(dev->rx_sg_skb); 1750 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { 1751 DBG(dev, "rx OOM %d" NL, slot); 1752 ++dev->estats.rx_dropped_oom; 1753 emac_recycle_rx_skb(dev, slot, 0); 1754 } else { 1755 dev->rx_sg_skb = skb; 1756 skb_put(skb, len); 1757 } 1758 } else if (!emac_rx_sg_append(dev, slot) && 1759 (ctrl & MAL_RX_CTRL_LAST)) { 1760 1761 skb = dev->rx_sg_skb; 1762 dev->rx_sg_skb = NULL; 1763 1764 ctrl &= EMAC_BAD_RX_MASK; 1765 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { 1766 emac_parse_rx_error(dev, ctrl); 1767 ++dev->estats.rx_dropped_error; 1768 dev_kfree_skb(skb); 1769 len = 0; 1770 } else 1771 goto push_packet; 1772 } 1773 goto skip; 1774 oom: 1775 DBG(dev, "rx OOM %d" NL, slot); 1776 /* Drop the packet and recycle skb */ 1777 ++dev->estats.rx_dropped_oom; 1778 emac_recycle_rx_skb(dev, slot, 0); 1779 goto next; 1780 } 1781 1782 if (received) { 1783 DBG2(dev, "rx %d BDs" NL, received); 1784 dev->rx_slot = slot; 1785 } 1786 1787 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) { 1788 mb(); 1789 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { 1790 DBG2(dev, "rx restart" NL); 1791 received = 0; 1792 goto again; 1793 } 1794 1795 if (dev->rx_sg_skb) { 1796 DBG2(dev, "dropping partial rx packet" NL); 1797 ++dev->estats.rx_dropped_error; 1798 dev_kfree_skb(dev->rx_sg_skb); 1799 dev->rx_sg_skb = NULL; 1800 } 1801 1802 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1803 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1804 emac_rx_enable(dev); 1805 dev->rx_slot = 0; 1806 } 1807 return received; 1808 } 1809 1810 /* NAPI poll context */ 1811 static int emac_peek_rx(void *param) 1812 { 1813 struct emac_instance *dev = param; 1814 1815 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); 1816 } 1817 1818 /* NAPI poll context */ 1819 static int emac_peek_rx_sg(void *param) 1820 { 1821 struct emac_instance *dev = param; 1822 1823 int slot = dev->rx_slot; 1824 while (1) { 1825 u16 ctrl = dev->rx_desc[slot].ctrl; 1826 if (ctrl & MAL_RX_CTRL_EMPTY) 1827 return 0; 1828 else if (ctrl & MAL_RX_CTRL_LAST) 1829 return 1; 1830 1831 slot = (slot + 1) % NUM_RX_BUFF; 1832 1833 /* I'm just being paranoid here :) */ 1834 if (unlikely(slot == dev->rx_slot)) 1835 return 0; 1836 } 1837 } 1838 1839 /* Hard IRQ */ 1840 static void emac_rxde(void *param) 1841 { 1842 struct emac_instance *dev = param; 1843 1844 ++dev->estats.rx_stopped; 1845 emac_rx_disable_async(dev); 1846 } 1847 1848 /* Hard IRQ */ 1849 static irqreturn_t emac_irq(int irq, void *dev_instance) 1850 { 1851 struct emac_instance *dev = dev_instance; 1852 struct emac_regs __iomem *p = dev->emacp; 1853 struct emac_error_stats *st = &dev->estats; 1854 u32 isr; 1855 1856 spin_lock(&dev->lock); 1857 1858 isr = in_be32(&p->isr); 1859 out_be32(&p->isr, isr); 1860 1861 DBG(dev, "isr = %08x" NL, isr); 1862 1863 if (isr & EMAC4_ISR_TXPE) 1864 ++st->tx_parity; 1865 if (isr & EMAC4_ISR_RXPE) 1866 ++st->rx_parity; 1867 if (isr & EMAC4_ISR_TXUE) 1868 ++st->tx_underrun; 1869 if (isr & EMAC4_ISR_RXOE) 1870 ++st->rx_fifo_overrun; 1871 if (isr & EMAC_ISR_OVR) 1872 ++st->rx_overrun; 1873 if (isr & EMAC_ISR_BP) 1874 ++st->rx_bad_packet; 1875 if (isr & EMAC_ISR_RP) 1876 ++st->rx_runt_packet; 1877 if (isr & EMAC_ISR_SE) 1878 ++st->rx_short_event; 1879 if (isr & EMAC_ISR_ALE) 1880 ++st->rx_alignment_error; 1881 if (isr & EMAC_ISR_BFCS) 1882 ++st->rx_bad_fcs; 1883 if (isr & EMAC_ISR_PTLE) 1884 ++st->rx_packet_too_long; 1885 if (isr & EMAC_ISR_ORE) 1886 ++st->rx_out_of_range; 1887 if (isr & EMAC_ISR_IRE) 1888 ++st->rx_in_range; 1889 if (isr & EMAC_ISR_SQE) 1890 ++st->tx_sqe; 1891 if (isr & EMAC_ISR_TE) 1892 ++st->tx_errors; 1893 1894 spin_unlock(&dev->lock); 1895 1896 return IRQ_HANDLED; 1897 } 1898 1899 static struct net_device_stats *emac_stats(struct net_device *ndev) 1900 { 1901 struct emac_instance *dev = netdev_priv(ndev); 1902 struct emac_stats *st = &dev->stats; 1903 struct emac_error_stats *est = &dev->estats; 1904 struct net_device_stats *nst = &dev->nstats; 1905 unsigned long flags; 1906 1907 DBG2(dev, "stats" NL); 1908 1909 /* Compute "legacy" statistics */ 1910 spin_lock_irqsave(&dev->lock, flags); 1911 nst->rx_packets = (unsigned long)st->rx_packets; 1912 nst->rx_bytes = (unsigned long)st->rx_bytes; 1913 nst->tx_packets = (unsigned long)st->tx_packets; 1914 nst->tx_bytes = (unsigned long)st->tx_bytes; 1915 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + 1916 est->rx_dropped_error + 1917 est->rx_dropped_resize + 1918 est->rx_dropped_mtu); 1919 nst->tx_dropped = (unsigned long)est->tx_dropped; 1920 1921 nst->rx_errors = (unsigned long)est->rx_bd_errors; 1922 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + 1923 est->rx_fifo_overrun + 1924 est->rx_overrun); 1925 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + 1926 est->rx_alignment_error); 1927 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + 1928 est->rx_bad_fcs); 1929 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + 1930 est->rx_bd_short_event + 1931 est->rx_bd_packet_too_long + 1932 est->rx_bd_out_of_range + 1933 est->rx_bd_in_range + 1934 est->rx_runt_packet + 1935 est->rx_short_event + 1936 est->rx_packet_too_long + 1937 est->rx_out_of_range + 1938 est->rx_in_range); 1939 1940 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); 1941 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + 1942 est->tx_underrun); 1943 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; 1944 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + 1945 est->tx_bd_excessive_collisions + 1946 est->tx_bd_late_collision + 1947 est->tx_bd_multple_collisions); 1948 spin_unlock_irqrestore(&dev->lock, flags); 1949 return nst; 1950 } 1951 1952 static struct mal_commac_ops emac_commac_ops = { 1953 .poll_tx = &emac_poll_tx, 1954 .poll_rx = &emac_poll_rx, 1955 .peek_rx = &emac_peek_rx, 1956 .rxde = &emac_rxde, 1957 }; 1958 1959 static struct mal_commac_ops emac_commac_sg_ops = { 1960 .poll_tx = &emac_poll_tx, 1961 .poll_rx = &emac_poll_rx, 1962 .peek_rx = &emac_peek_rx_sg, 1963 .rxde = &emac_rxde, 1964 }; 1965 1966 /* Ethtool support */ 1967 static int emac_ethtool_get_settings(struct net_device *ndev, 1968 struct ethtool_cmd *cmd) 1969 { 1970 struct emac_instance *dev = netdev_priv(ndev); 1971 1972 cmd->supported = dev->phy.features; 1973 cmd->port = PORT_MII; 1974 cmd->phy_address = dev->phy.address; 1975 cmd->transceiver = 1976 dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL; 1977 1978 mutex_lock(&dev->link_lock); 1979 cmd->advertising = dev->phy.advertising; 1980 cmd->autoneg = dev->phy.autoneg; 1981 cmd->speed = dev->phy.speed; 1982 cmd->duplex = dev->phy.duplex; 1983 mutex_unlock(&dev->link_lock); 1984 1985 return 0; 1986 } 1987 1988 static int emac_ethtool_set_settings(struct net_device *ndev, 1989 struct ethtool_cmd *cmd) 1990 { 1991 struct emac_instance *dev = netdev_priv(ndev); 1992 u32 f = dev->phy.features; 1993 1994 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL, 1995 cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising); 1996 1997 /* Basic sanity checks */ 1998 if (dev->phy.address < 0) 1999 return -EOPNOTSUPP; 2000 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) 2001 return -EINVAL; 2002 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) 2003 return -EINVAL; 2004 if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) 2005 return -EINVAL; 2006 2007 if (cmd->autoneg == AUTONEG_DISABLE) { 2008 switch (cmd->speed) { 2009 case SPEED_10: 2010 if (cmd->duplex == DUPLEX_HALF && 2011 !(f & SUPPORTED_10baseT_Half)) 2012 return -EINVAL; 2013 if (cmd->duplex == DUPLEX_FULL && 2014 !(f & SUPPORTED_10baseT_Full)) 2015 return -EINVAL; 2016 break; 2017 case SPEED_100: 2018 if (cmd->duplex == DUPLEX_HALF && 2019 !(f & SUPPORTED_100baseT_Half)) 2020 return -EINVAL; 2021 if (cmd->duplex == DUPLEX_FULL && 2022 !(f & SUPPORTED_100baseT_Full)) 2023 return -EINVAL; 2024 break; 2025 case SPEED_1000: 2026 if (cmd->duplex == DUPLEX_HALF && 2027 !(f & SUPPORTED_1000baseT_Half)) 2028 return -EINVAL; 2029 if (cmd->duplex == DUPLEX_FULL && 2030 !(f & SUPPORTED_1000baseT_Full)) 2031 return -EINVAL; 2032 break; 2033 default: 2034 return -EINVAL; 2035 } 2036 2037 mutex_lock(&dev->link_lock); 2038 dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed, 2039 cmd->duplex); 2040 mutex_unlock(&dev->link_lock); 2041 2042 } else { 2043 if (!(f & SUPPORTED_Autoneg)) 2044 return -EINVAL; 2045 2046 mutex_lock(&dev->link_lock); 2047 dev->phy.def->ops->setup_aneg(&dev->phy, 2048 (cmd->advertising & f) | 2049 (dev->phy.advertising & 2050 (ADVERTISED_Pause | 2051 ADVERTISED_Asym_Pause))); 2052 mutex_unlock(&dev->link_lock); 2053 } 2054 emac_force_link_update(dev); 2055 2056 return 0; 2057 } 2058 2059 static void emac_ethtool_get_ringparam(struct net_device *ndev, 2060 struct ethtool_ringparam *rp) 2061 { 2062 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; 2063 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; 2064 } 2065 2066 static void emac_ethtool_get_pauseparam(struct net_device *ndev, 2067 struct ethtool_pauseparam *pp) 2068 { 2069 struct emac_instance *dev = netdev_priv(ndev); 2070 2071 mutex_lock(&dev->link_lock); 2072 if ((dev->phy.features & SUPPORTED_Autoneg) && 2073 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) 2074 pp->autoneg = 1; 2075 2076 if (dev->phy.duplex == DUPLEX_FULL) { 2077 if (dev->phy.pause) 2078 pp->rx_pause = pp->tx_pause = 1; 2079 else if (dev->phy.asym_pause) 2080 pp->tx_pause = 1; 2081 } 2082 mutex_unlock(&dev->link_lock); 2083 } 2084 2085 static int emac_get_regs_len(struct emac_instance *dev) 2086 { 2087 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 2088 return sizeof(struct emac_ethtool_regs_subhdr) + 2089 EMAC4_ETHTOOL_REGS_SIZE(dev); 2090 else 2091 return sizeof(struct emac_ethtool_regs_subhdr) + 2092 EMAC_ETHTOOL_REGS_SIZE(dev); 2093 } 2094 2095 static int emac_ethtool_get_regs_len(struct net_device *ndev) 2096 { 2097 struct emac_instance *dev = netdev_priv(ndev); 2098 int size; 2099 2100 size = sizeof(struct emac_ethtool_regs_hdr) + 2101 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal); 2102 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 2103 size += zmii_get_regs_len(dev->zmii_dev); 2104 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 2105 size += rgmii_get_regs_len(dev->rgmii_dev); 2106 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 2107 size += tah_get_regs_len(dev->tah_dev); 2108 2109 return size; 2110 } 2111 2112 static void *emac_dump_regs(struct emac_instance *dev, void *buf) 2113 { 2114 struct emac_ethtool_regs_subhdr *hdr = buf; 2115 2116 hdr->index = dev->cell_index; 2117 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) { 2118 hdr->version = EMAC4_ETHTOOL_REGS_VER; 2119 memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev)); 2120 return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev); 2121 } else { 2122 hdr->version = EMAC_ETHTOOL_REGS_VER; 2123 memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev)); 2124 return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev); 2125 } 2126 } 2127 2128 static void emac_ethtool_get_regs(struct net_device *ndev, 2129 struct ethtool_regs *regs, void *buf) 2130 { 2131 struct emac_instance *dev = netdev_priv(ndev); 2132 struct emac_ethtool_regs_hdr *hdr = buf; 2133 2134 hdr->components = 0; 2135 buf = hdr + 1; 2136 2137 buf = mal_dump_regs(dev->mal, buf); 2138 buf = emac_dump_regs(dev, buf); 2139 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) { 2140 hdr->components |= EMAC_ETHTOOL_REGS_ZMII; 2141 buf = zmii_dump_regs(dev->zmii_dev, buf); 2142 } 2143 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { 2144 hdr->components |= EMAC_ETHTOOL_REGS_RGMII; 2145 buf = rgmii_dump_regs(dev->rgmii_dev, buf); 2146 } 2147 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) { 2148 hdr->components |= EMAC_ETHTOOL_REGS_TAH; 2149 buf = tah_dump_regs(dev->tah_dev, buf); 2150 } 2151 } 2152 2153 static int emac_ethtool_nway_reset(struct net_device *ndev) 2154 { 2155 struct emac_instance *dev = netdev_priv(ndev); 2156 int res = 0; 2157 2158 DBG(dev, "nway_reset" NL); 2159 2160 if (dev->phy.address < 0) 2161 return -EOPNOTSUPP; 2162 2163 mutex_lock(&dev->link_lock); 2164 if (!dev->phy.autoneg) { 2165 res = -EINVAL; 2166 goto out; 2167 } 2168 2169 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); 2170 out: 2171 mutex_unlock(&dev->link_lock); 2172 emac_force_link_update(dev); 2173 return res; 2174 } 2175 2176 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset) 2177 { 2178 if (stringset == ETH_SS_STATS) 2179 return EMAC_ETHTOOL_STATS_COUNT; 2180 else 2181 return -EINVAL; 2182 } 2183 2184 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, 2185 u8 * buf) 2186 { 2187 if (stringset == ETH_SS_STATS) 2188 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); 2189 } 2190 2191 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, 2192 struct ethtool_stats *estats, 2193 u64 * tmp_stats) 2194 { 2195 struct emac_instance *dev = netdev_priv(ndev); 2196 2197 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); 2198 tmp_stats += sizeof(dev->stats) / sizeof(u64); 2199 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); 2200 } 2201 2202 static void emac_ethtool_get_drvinfo(struct net_device *ndev, 2203 struct ethtool_drvinfo *info) 2204 { 2205 struct emac_instance *dev = netdev_priv(ndev); 2206 2207 strlcpy(info->driver, "ibm_emac", sizeof(info->driver)); 2208 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 2209 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s", 2210 dev->cell_index, dev->ofdev->dev.of_node->full_name); 2211 info->regdump_len = emac_ethtool_get_regs_len(ndev); 2212 } 2213 2214 static const struct ethtool_ops emac_ethtool_ops = { 2215 .get_settings = emac_ethtool_get_settings, 2216 .set_settings = emac_ethtool_set_settings, 2217 .get_drvinfo = emac_ethtool_get_drvinfo, 2218 2219 .get_regs_len = emac_ethtool_get_regs_len, 2220 .get_regs = emac_ethtool_get_regs, 2221 2222 .nway_reset = emac_ethtool_nway_reset, 2223 2224 .get_ringparam = emac_ethtool_get_ringparam, 2225 .get_pauseparam = emac_ethtool_get_pauseparam, 2226 2227 .get_strings = emac_ethtool_get_strings, 2228 .get_sset_count = emac_ethtool_get_sset_count, 2229 .get_ethtool_stats = emac_ethtool_get_ethtool_stats, 2230 2231 .get_link = ethtool_op_get_link, 2232 }; 2233 2234 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) 2235 { 2236 struct emac_instance *dev = netdev_priv(ndev); 2237 struct mii_ioctl_data *data = if_mii(rq); 2238 2239 DBG(dev, "ioctl %08x" NL, cmd); 2240 2241 if (dev->phy.address < 0) 2242 return -EOPNOTSUPP; 2243 2244 switch (cmd) { 2245 case SIOCGMIIPHY: 2246 data->phy_id = dev->phy.address; 2247 /* Fall through */ 2248 case SIOCGMIIREG: 2249 data->val_out = emac_mdio_read(ndev, dev->phy.address, 2250 data->reg_num); 2251 return 0; 2252 2253 case SIOCSMIIREG: 2254 emac_mdio_write(ndev, dev->phy.address, data->reg_num, 2255 data->val_in); 2256 return 0; 2257 default: 2258 return -EOPNOTSUPP; 2259 } 2260 } 2261 2262 struct emac_depentry { 2263 u32 phandle; 2264 struct device_node *node; 2265 struct platform_device *ofdev; 2266 void *drvdata; 2267 }; 2268 2269 #define EMAC_DEP_MAL_IDX 0 2270 #define EMAC_DEP_ZMII_IDX 1 2271 #define EMAC_DEP_RGMII_IDX 2 2272 #define EMAC_DEP_TAH_IDX 3 2273 #define EMAC_DEP_MDIO_IDX 4 2274 #define EMAC_DEP_PREV_IDX 5 2275 #define EMAC_DEP_COUNT 6 2276 2277 static int emac_check_deps(struct emac_instance *dev, 2278 struct emac_depentry *deps) 2279 { 2280 int i, there = 0; 2281 struct device_node *np; 2282 2283 for (i = 0; i < EMAC_DEP_COUNT; i++) { 2284 /* no dependency on that item, allright */ 2285 if (deps[i].phandle == 0) { 2286 there++; 2287 continue; 2288 } 2289 /* special case for blist as the dependency might go away */ 2290 if (i == EMAC_DEP_PREV_IDX) { 2291 np = *(dev->blist - 1); 2292 if (np == NULL) { 2293 deps[i].phandle = 0; 2294 there++; 2295 continue; 2296 } 2297 if (deps[i].node == NULL) 2298 deps[i].node = of_node_get(np); 2299 } 2300 if (deps[i].node == NULL) 2301 deps[i].node = of_find_node_by_phandle(deps[i].phandle); 2302 if (deps[i].node == NULL) 2303 continue; 2304 if (deps[i].ofdev == NULL) 2305 deps[i].ofdev = of_find_device_by_node(deps[i].node); 2306 if (deps[i].ofdev == NULL) 2307 continue; 2308 if (deps[i].drvdata == NULL) 2309 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev); 2310 if (deps[i].drvdata != NULL) 2311 there++; 2312 } 2313 return there == EMAC_DEP_COUNT; 2314 } 2315 2316 static void emac_put_deps(struct emac_instance *dev) 2317 { 2318 of_dev_put(dev->mal_dev); 2319 of_dev_put(dev->zmii_dev); 2320 of_dev_put(dev->rgmii_dev); 2321 of_dev_put(dev->mdio_dev); 2322 of_dev_put(dev->tah_dev); 2323 } 2324 2325 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action, 2326 void *data) 2327 { 2328 /* We are only intereted in device addition */ 2329 if (action == BUS_NOTIFY_BOUND_DRIVER) 2330 wake_up_all(&emac_probe_wait); 2331 return 0; 2332 } 2333 2334 static struct notifier_block emac_of_bus_notifier = { 2335 .notifier_call = emac_of_bus_notify 2336 }; 2337 2338 static int emac_wait_deps(struct emac_instance *dev) 2339 { 2340 struct emac_depentry deps[EMAC_DEP_COUNT]; 2341 int i, err; 2342 2343 memset(&deps, 0, sizeof(deps)); 2344 2345 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph; 2346 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph; 2347 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph; 2348 if (dev->tah_ph) 2349 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph; 2350 if (dev->mdio_ph) 2351 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph; 2352 if (dev->blist && dev->blist > emac_boot_list) 2353 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu; 2354 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier); 2355 wait_event_timeout(emac_probe_wait, 2356 emac_check_deps(dev, deps), 2357 EMAC_PROBE_DEP_TIMEOUT); 2358 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier); 2359 err = emac_check_deps(dev, deps) ? 0 : -ENODEV; 2360 for (i = 0; i < EMAC_DEP_COUNT; i++) { 2361 of_node_put(deps[i].node); 2362 if (err) 2363 of_dev_put(deps[i].ofdev); 2364 } 2365 if (err == 0) { 2366 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; 2367 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev; 2368 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev; 2369 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; 2370 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; 2371 } 2372 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); 2373 return err; 2374 } 2375 2376 static int emac_read_uint_prop(struct device_node *np, const char *name, 2377 u32 *val, int fatal) 2378 { 2379 int len; 2380 const u32 *prop = of_get_property(np, name, &len); 2381 if (prop == NULL || len < sizeof(u32)) { 2382 if (fatal) 2383 printk(KERN_ERR "%s: missing %s property\n", 2384 np->full_name, name); 2385 return -ENODEV; 2386 } 2387 *val = *prop; 2388 return 0; 2389 } 2390 2391 static int emac_init_phy(struct emac_instance *dev) 2392 { 2393 struct device_node *np = dev->ofdev->dev.of_node; 2394 struct net_device *ndev = dev->ndev; 2395 u32 phy_map, adv; 2396 int i; 2397 2398 dev->phy.dev = ndev; 2399 dev->phy.mode = dev->phy_mode; 2400 2401 /* PHY-less configuration. 2402 * XXX I probably should move these settings to the dev tree 2403 */ 2404 if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) { 2405 emac_reset(dev); 2406 2407 /* PHY-less configuration. 2408 * XXX I probably should move these settings to the dev tree 2409 */ 2410 dev->phy.address = -1; 2411 dev->phy.features = SUPPORTED_MII; 2412 if (emac_phy_supports_gige(dev->phy_mode)) 2413 dev->phy.features |= SUPPORTED_1000baseT_Full; 2414 else 2415 dev->phy.features |= SUPPORTED_100baseT_Full; 2416 dev->phy.pause = 1; 2417 2418 return 0; 2419 } 2420 2421 mutex_lock(&emac_phy_map_lock); 2422 phy_map = dev->phy_map | busy_phy_map; 2423 2424 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map); 2425 2426 dev->phy.mdio_read = emac_mdio_read; 2427 dev->phy.mdio_write = emac_mdio_write; 2428 2429 /* Enable internal clock source */ 2430 #ifdef CONFIG_PPC_DCR_NATIVE 2431 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2432 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); 2433 #endif 2434 /* PHY clock workaround */ 2435 emac_rx_clk_tx(dev); 2436 2437 /* Enable internal clock source on 440GX*/ 2438 #ifdef CONFIG_PPC_DCR_NATIVE 2439 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2440 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); 2441 #endif 2442 /* Configure EMAC with defaults so we can at least use MDIO 2443 * This is needed mostly for 440GX 2444 */ 2445 if (emac_phy_gpcs(dev->phy.mode)) { 2446 /* XXX 2447 * Make GPCS PHY address equal to EMAC index. 2448 * We probably should take into account busy_phy_map 2449 * and/or phy_map here. 2450 * 2451 * Note that the busy_phy_map is currently global 2452 * while it should probably be per-ASIC... 2453 */ 2454 dev->phy.gpcs_address = dev->gpcs_address; 2455 if (dev->phy.gpcs_address == 0xffffffff) 2456 dev->phy.address = dev->cell_index; 2457 } 2458 2459 emac_configure(dev); 2460 2461 if (dev->phy_address != 0xffffffff) 2462 phy_map = ~(1 << dev->phy_address); 2463 2464 for (i = 0; i < 0x20; phy_map >>= 1, ++i) 2465 if (!(phy_map & 1)) { 2466 int r; 2467 busy_phy_map |= 1 << i; 2468 2469 /* Quick check if there is a PHY at the address */ 2470 r = emac_mdio_read(dev->ndev, i, MII_BMCR); 2471 if (r == 0xffff || r < 0) 2472 continue; 2473 if (!emac_mii_phy_probe(&dev->phy, i)) 2474 break; 2475 } 2476 2477 /* Enable external clock source */ 2478 #ifdef CONFIG_PPC_DCR_NATIVE 2479 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2480 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0); 2481 #endif 2482 mutex_unlock(&emac_phy_map_lock); 2483 if (i == 0x20) { 2484 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name); 2485 return -ENXIO; 2486 } 2487 2488 /* Init PHY */ 2489 if (dev->phy.def->ops->init) 2490 dev->phy.def->ops->init(&dev->phy); 2491 2492 /* Disable any PHY features not supported by the platform */ 2493 dev->phy.def->features &= ~dev->phy_feat_exc; 2494 dev->phy.features &= ~dev->phy_feat_exc; 2495 2496 /* Setup initial link parameters */ 2497 if (dev->phy.features & SUPPORTED_Autoneg) { 2498 adv = dev->phy.features; 2499 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x)) 2500 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; 2501 /* Restart autonegotiation */ 2502 dev->phy.def->ops->setup_aneg(&dev->phy, adv); 2503 } else { 2504 u32 f = dev->phy.def->features; 2505 int speed = SPEED_10, fd = DUPLEX_HALF; 2506 2507 /* Select highest supported speed/duplex */ 2508 if (f & SUPPORTED_1000baseT_Full) { 2509 speed = SPEED_1000; 2510 fd = DUPLEX_FULL; 2511 } else if (f & SUPPORTED_1000baseT_Half) 2512 speed = SPEED_1000; 2513 else if (f & SUPPORTED_100baseT_Full) { 2514 speed = SPEED_100; 2515 fd = DUPLEX_FULL; 2516 } else if (f & SUPPORTED_100baseT_Half) 2517 speed = SPEED_100; 2518 else if (f & SUPPORTED_10baseT_Full) 2519 fd = DUPLEX_FULL; 2520 2521 /* Force link parameters */ 2522 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); 2523 } 2524 return 0; 2525 } 2526 2527 static int emac_init_config(struct emac_instance *dev) 2528 { 2529 struct device_node *np = dev->ofdev->dev.of_node; 2530 const void *p; 2531 2532 /* Read config from device-tree */ 2533 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1)) 2534 return -ENXIO; 2535 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1)) 2536 return -ENXIO; 2537 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1)) 2538 return -ENXIO; 2539 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1)) 2540 return -ENXIO; 2541 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0)) 2542 dev->max_mtu = 1500; 2543 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0)) 2544 dev->rx_fifo_size = 2048; 2545 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0)) 2546 dev->tx_fifo_size = 2048; 2547 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0)) 2548 dev->rx_fifo_size_gige = dev->rx_fifo_size; 2549 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0)) 2550 dev->tx_fifo_size_gige = dev->tx_fifo_size; 2551 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0)) 2552 dev->phy_address = 0xffffffff; 2553 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0)) 2554 dev->phy_map = 0xffffffff; 2555 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0)) 2556 dev->gpcs_address = 0xffffffff; 2557 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1)) 2558 return -ENXIO; 2559 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0)) 2560 dev->tah_ph = 0; 2561 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0)) 2562 dev->tah_port = 0; 2563 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0)) 2564 dev->mdio_ph = 0; 2565 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0)) 2566 dev->zmii_ph = 0; 2567 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0)) 2568 dev->zmii_port = 0xffffffff; 2569 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0)) 2570 dev->rgmii_ph = 0; 2571 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0)) 2572 dev->rgmii_port = 0xffffffff; 2573 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0)) 2574 dev->fifo_entry_size = 16; 2575 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0)) 2576 dev->mal_burst_size = 256; 2577 2578 /* PHY mode needs some decoding */ 2579 dev->phy_mode = of_get_phy_mode(np); 2580 if (dev->phy_mode < 0) 2581 dev->phy_mode = PHY_MODE_NA; 2582 2583 /* Check EMAC version */ 2584 if (of_device_is_compatible(np, "ibm,emac4sync")) { 2585 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC); 2586 if (of_device_is_compatible(np, "ibm,emac-460ex") || 2587 of_device_is_compatible(np, "ibm,emac-460gt")) 2588 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX; 2589 if (of_device_is_compatible(np, "ibm,emac-405ex") || 2590 of_device_is_compatible(np, "ibm,emac-405exr")) 2591 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; 2592 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) { 2593 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE | 2594 EMAC_FTR_APM821XX_NO_HALF_DUPLEX | 2595 EMAC_FTR_460EX_PHY_CLK_FIX); 2596 } 2597 } else if (of_device_is_compatible(np, "ibm,emac4")) { 2598 dev->features |= EMAC_FTR_EMAC4; 2599 if (of_device_is_compatible(np, "ibm,emac-440gx")) 2600 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX; 2601 } else { 2602 if (of_device_is_compatible(np, "ibm,emac-440ep") || 2603 of_device_is_compatible(np, "ibm,emac-440gr")) 2604 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; 2605 if (of_device_is_compatible(np, "ibm,emac-405ez")) { 2606 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL 2607 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x; 2608 #else 2609 printk(KERN_ERR "%s: Flow control not disabled!\n", 2610 np->full_name); 2611 return -ENXIO; 2612 #endif 2613 } 2614 2615 } 2616 2617 /* Fixup some feature bits based on the device tree */ 2618 if (of_get_property(np, "has-inverted-stacr-oc", NULL)) 2619 dev->features |= EMAC_FTR_STACR_OC_INVERT; 2620 if (of_get_property(np, "has-new-stacr-staopc", NULL)) 2621 dev->features |= EMAC_FTR_HAS_NEW_STACR; 2622 2623 /* CAB lacks the appropriate properties */ 2624 if (of_device_is_compatible(np, "ibm,emac-axon")) 2625 dev->features |= EMAC_FTR_HAS_NEW_STACR | 2626 EMAC_FTR_STACR_OC_INVERT; 2627 2628 /* Enable TAH/ZMII/RGMII features as found */ 2629 if (dev->tah_ph != 0) { 2630 #ifdef CONFIG_IBM_EMAC_TAH 2631 dev->features |= EMAC_FTR_HAS_TAH; 2632 #else 2633 printk(KERN_ERR "%s: TAH support not enabled !\n", 2634 np->full_name); 2635 return -ENXIO; 2636 #endif 2637 } 2638 2639 if (dev->zmii_ph != 0) { 2640 #ifdef CONFIG_IBM_EMAC_ZMII 2641 dev->features |= EMAC_FTR_HAS_ZMII; 2642 #else 2643 printk(KERN_ERR "%s: ZMII support not enabled !\n", 2644 np->full_name); 2645 return -ENXIO; 2646 #endif 2647 } 2648 2649 if (dev->rgmii_ph != 0) { 2650 #ifdef CONFIG_IBM_EMAC_RGMII 2651 dev->features |= EMAC_FTR_HAS_RGMII; 2652 #else 2653 printk(KERN_ERR "%s: RGMII support not enabled !\n", 2654 np->full_name); 2655 return -ENXIO; 2656 #endif 2657 } 2658 2659 /* Read MAC-address */ 2660 p = of_get_property(np, "local-mac-address", NULL); 2661 if (p == NULL) { 2662 printk(KERN_ERR "%s: Can't find local-mac-address property\n", 2663 np->full_name); 2664 return -ENXIO; 2665 } 2666 memcpy(dev->ndev->dev_addr, p, ETH_ALEN); 2667 2668 /* IAHT and GAHT filter parameterization */ 2669 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { 2670 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT; 2671 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT; 2672 } else { 2673 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT; 2674 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT; 2675 } 2676 2677 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE); 2678 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige); 2679 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige); 2680 DBG(dev, "max_mtu : %d\n", dev->max_mtu); 2681 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq); 2682 2683 return 0; 2684 } 2685 2686 static const struct net_device_ops emac_netdev_ops = { 2687 .ndo_open = emac_open, 2688 .ndo_stop = emac_close, 2689 .ndo_get_stats = emac_stats, 2690 .ndo_set_rx_mode = emac_set_multicast_list, 2691 .ndo_do_ioctl = emac_ioctl, 2692 .ndo_tx_timeout = emac_tx_timeout, 2693 .ndo_validate_addr = eth_validate_addr, 2694 .ndo_set_mac_address = eth_mac_addr, 2695 .ndo_start_xmit = emac_start_xmit, 2696 .ndo_change_mtu = eth_change_mtu, 2697 }; 2698 2699 static const struct net_device_ops emac_gige_netdev_ops = { 2700 .ndo_open = emac_open, 2701 .ndo_stop = emac_close, 2702 .ndo_get_stats = emac_stats, 2703 .ndo_set_rx_mode = emac_set_multicast_list, 2704 .ndo_do_ioctl = emac_ioctl, 2705 .ndo_tx_timeout = emac_tx_timeout, 2706 .ndo_validate_addr = eth_validate_addr, 2707 .ndo_set_mac_address = eth_mac_addr, 2708 .ndo_start_xmit = emac_start_xmit_sg, 2709 .ndo_change_mtu = emac_change_mtu, 2710 }; 2711 2712 static int emac_probe(struct platform_device *ofdev) 2713 { 2714 struct net_device *ndev; 2715 struct emac_instance *dev; 2716 struct device_node *np = ofdev->dev.of_node; 2717 struct device_node **blist = NULL; 2718 int err, i; 2719 2720 /* Skip unused/unwired EMACS. We leave the check for an unused 2721 * property here for now, but new flat device trees should set a 2722 * status property to "disabled" instead. 2723 */ 2724 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np)) 2725 return -ENODEV; 2726 2727 /* Find ourselves in the bootlist if we are there */ 2728 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) 2729 if (emac_boot_list[i] == np) 2730 blist = &emac_boot_list[i]; 2731 2732 /* Allocate our net_device structure */ 2733 err = -ENOMEM; 2734 ndev = alloc_etherdev(sizeof(struct emac_instance)); 2735 if (!ndev) 2736 goto err_gone; 2737 2738 dev = netdev_priv(ndev); 2739 dev->ndev = ndev; 2740 dev->ofdev = ofdev; 2741 dev->blist = blist; 2742 SET_NETDEV_DEV(ndev, &ofdev->dev); 2743 2744 /* Initialize some embedded data structures */ 2745 mutex_init(&dev->mdio_lock); 2746 mutex_init(&dev->link_lock); 2747 spin_lock_init(&dev->lock); 2748 INIT_WORK(&dev->reset_work, emac_reset_work); 2749 2750 /* Init various config data based on device-tree */ 2751 err = emac_init_config(dev); 2752 if (err != 0) 2753 goto err_free; 2754 2755 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */ 2756 dev->emac_irq = irq_of_parse_and_map(np, 0); 2757 dev->wol_irq = irq_of_parse_and_map(np, 1); 2758 if (dev->emac_irq == NO_IRQ) { 2759 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name); 2760 goto err_free; 2761 } 2762 ndev->irq = dev->emac_irq; 2763 2764 /* Map EMAC regs */ 2765 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) { 2766 printk(KERN_ERR "%s: Can't get registers address\n", 2767 np->full_name); 2768 goto err_irq_unmap; 2769 } 2770 // TODO : request_mem_region 2771 dev->emacp = ioremap(dev->rsrc_regs.start, 2772 resource_size(&dev->rsrc_regs)); 2773 if (dev->emacp == NULL) { 2774 printk(KERN_ERR "%s: Can't map device registers!\n", 2775 np->full_name); 2776 err = -ENOMEM; 2777 goto err_irq_unmap; 2778 } 2779 2780 /* Wait for dependent devices */ 2781 err = emac_wait_deps(dev); 2782 if (err) { 2783 printk(KERN_ERR 2784 "%s: Timeout waiting for dependent devices\n", 2785 np->full_name); 2786 /* display more info about what's missing ? */ 2787 goto err_reg_unmap; 2788 } 2789 dev->mal = platform_get_drvdata(dev->mal_dev); 2790 if (dev->mdio_dev != NULL) 2791 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev); 2792 2793 /* Register with MAL */ 2794 dev->commac.ops = &emac_commac_ops; 2795 dev->commac.dev = dev; 2796 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan); 2797 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan); 2798 err = mal_register_commac(dev->mal, &dev->commac); 2799 if (err) { 2800 printk(KERN_ERR "%s: failed to register with mal %s!\n", 2801 np->full_name, dev->mal_dev->dev.of_node->full_name); 2802 goto err_rel_deps; 2803 } 2804 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); 2805 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); 2806 2807 /* Get pointers to BD rings */ 2808 dev->tx_desc = 2809 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan); 2810 dev->rx_desc = 2811 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan); 2812 2813 DBG(dev, "tx_desc %p" NL, dev->tx_desc); 2814 DBG(dev, "rx_desc %p" NL, dev->rx_desc); 2815 2816 /* Clean rings */ 2817 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); 2818 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); 2819 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *)); 2820 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *)); 2821 2822 /* Attach to ZMII, if needed */ 2823 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) && 2824 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0) 2825 goto err_unreg_commac; 2826 2827 /* Attach to RGMII, if needed */ 2828 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) && 2829 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0) 2830 goto err_detach_zmii; 2831 2832 /* Attach to TAH, if needed */ 2833 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && 2834 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0) 2835 goto err_detach_rgmii; 2836 2837 /* Set some link defaults before we can find out real parameters */ 2838 dev->phy.speed = SPEED_100; 2839 dev->phy.duplex = DUPLEX_FULL; 2840 dev->phy.autoneg = AUTONEG_DISABLE; 2841 dev->phy.pause = dev->phy.asym_pause = 0; 2842 dev->stop_timeout = STOP_TIMEOUT_100; 2843 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer); 2844 2845 /* Some SoCs like APM821xx does not support Half Duplex mode. */ 2846 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) { 2847 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half | 2848 SUPPORTED_100baseT_Half | 2849 SUPPORTED_10baseT_Half); 2850 } 2851 2852 /* Find PHY if any */ 2853 err = emac_init_phy(dev); 2854 if (err != 0) 2855 goto err_detach_tah; 2856 2857 if (dev->tah_dev) { 2858 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG; 2859 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM; 2860 } 2861 ndev->watchdog_timeo = 5 * HZ; 2862 if (emac_phy_supports_gige(dev->phy_mode)) { 2863 ndev->netdev_ops = &emac_gige_netdev_ops; 2864 dev->commac.ops = &emac_commac_sg_ops; 2865 } else 2866 ndev->netdev_ops = &emac_netdev_ops; 2867 ndev->ethtool_ops = &emac_ethtool_ops; 2868 2869 netif_carrier_off(ndev); 2870 2871 err = register_netdev(ndev); 2872 if (err) { 2873 printk(KERN_ERR "%s: failed to register net device (%d)!\n", 2874 np->full_name, err); 2875 goto err_detach_tah; 2876 } 2877 2878 /* Set our drvdata last as we don't want them visible until we are 2879 * fully initialized 2880 */ 2881 wmb(); 2882 platform_set_drvdata(ofdev, dev); 2883 2884 /* There's a new kid in town ! Let's tell everybody */ 2885 wake_up_all(&emac_probe_wait); 2886 2887 2888 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n", 2889 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr); 2890 2891 if (dev->phy_mode == PHY_MODE_SGMII) 2892 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name); 2893 2894 if (dev->phy.address >= 0) 2895 printk("%s: found %s PHY (0x%02x)\n", ndev->name, 2896 dev->phy.def->name, dev->phy.address); 2897 2898 emac_dbg_register(dev); 2899 2900 /* Life is good */ 2901 return 0; 2902 2903 /* I have a bad feeling about this ... */ 2904 2905 err_detach_tah: 2906 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 2907 tah_detach(dev->tah_dev, dev->tah_port); 2908 err_detach_rgmii: 2909 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 2910 rgmii_detach(dev->rgmii_dev, dev->rgmii_port); 2911 err_detach_zmii: 2912 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 2913 zmii_detach(dev->zmii_dev, dev->zmii_port); 2914 err_unreg_commac: 2915 mal_unregister_commac(dev->mal, &dev->commac); 2916 err_rel_deps: 2917 emac_put_deps(dev); 2918 err_reg_unmap: 2919 iounmap(dev->emacp); 2920 err_irq_unmap: 2921 if (dev->wol_irq != NO_IRQ) 2922 irq_dispose_mapping(dev->wol_irq); 2923 if (dev->emac_irq != NO_IRQ) 2924 irq_dispose_mapping(dev->emac_irq); 2925 err_free: 2926 free_netdev(ndev); 2927 err_gone: 2928 /* if we were on the bootlist, remove us as we won't show up and 2929 * wake up all waiters to notify them in case they were waiting 2930 * on us 2931 */ 2932 if (blist) { 2933 *blist = NULL; 2934 wake_up_all(&emac_probe_wait); 2935 } 2936 return err; 2937 } 2938 2939 static int emac_remove(struct platform_device *ofdev) 2940 { 2941 struct emac_instance *dev = platform_get_drvdata(ofdev); 2942 2943 DBG(dev, "remove" NL); 2944 2945 unregister_netdev(dev->ndev); 2946 2947 cancel_work_sync(&dev->reset_work); 2948 2949 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 2950 tah_detach(dev->tah_dev, dev->tah_port); 2951 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 2952 rgmii_detach(dev->rgmii_dev, dev->rgmii_port); 2953 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 2954 zmii_detach(dev->zmii_dev, dev->zmii_port); 2955 2956 busy_phy_map &= ~(1 << dev->phy.address); 2957 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map); 2958 2959 mal_unregister_commac(dev->mal, &dev->commac); 2960 emac_put_deps(dev); 2961 2962 emac_dbg_unregister(dev); 2963 iounmap(dev->emacp); 2964 2965 if (dev->wol_irq != NO_IRQ) 2966 irq_dispose_mapping(dev->wol_irq); 2967 if (dev->emac_irq != NO_IRQ) 2968 irq_dispose_mapping(dev->emac_irq); 2969 2970 free_netdev(dev->ndev); 2971 2972 return 0; 2973 } 2974 2975 /* XXX Features in here should be replaced by properties... */ 2976 static const struct of_device_id emac_match[] = 2977 { 2978 { 2979 .type = "network", 2980 .compatible = "ibm,emac", 2981 }, 2982 { 2983 .type = "network", 2984 .compatible = "ibm,emac4", 2985 }, 2986 { 2987 .type = "network", 2988 .compatible = "ibm,emac4sync", 2989 }, 2990 {}, 2991 }; 2992 MODULE_DEVICE_TABLE(of, emac_match); 2993 2994 static struct platform_driver emac_driver = { 2995 .driver = { 2996 .name = "emac", 2997 .of_match_table = emac_match, 2998 }, 2999 .probe = emac_probe, 3000 .remove = emac_remove, 3001 }; 3002 3003 static void __init emac_make_bootlist(void) 3004 { 3005 struct device_node *np = NULL; 3006 int j, max, i = 0, k; 3007 int cell_indices[EMAC_BOOT_LIST_SIZE]; 3008 3009 /* Collect EMACs */ 3010 while((np = of_find_all_nodes(np)) != NULL) { 3011 const u32 *idx; 3012 3013 if (of_match_node(emac_match, np) == NULL) 3014 continue; 3015 if (of_get_property(np, "unused", NULL)) 3016 continue; 3017 idx = of_get_property(np, "cell-index", NULL); 3018 if (idx == NULL) 3019 continue; 3020 cell_indices[i] = *idx; 3021 emac_boot_list[i++] = of_node_get(np); 3022 if (i >= EMAC_BOOT_LIST_SIZE) { 3023 of_node_put(np); 3024 break; 3025 } 3026 } 3027 max = i; 3028 3029 /* Bubble sort them (doh, what a creative algorithm :-) */ 3030 for (i = 0; max > 1 && (i < (max - 1)); i++) 3031 for (j = i; j < max; j++) { 3032 if (cell_indices[i] > cell_indices[j]) { 3033 np = emac_boot_list[i]; 3034 emac_boot_list[i] = emac_boot_list[j]; 3035 emac_boot_list[j] = np; 3036 k = cell_indices[i]; 3037 cell_indices[i] = cell_indices[j]; 3038 cell_indices[j] = k; 3039 } 3040 } 3041 } 3042 3043 static int __init emac_init(void) 3044 { 3045 int rc; 3046 3047 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); 3048 3049 /* Init debug stuff */ 3050 emac_init_debug(); 3051 3052 /* Build EMAC boot list */ 3053 emac_make_bootlist(); 3054 3055 /* Init submodules */ 3056 rc = mal_init(); 3057 if (rc) 3058 goto err; 3059 rc = zmii_init(); 3060 if (rc) 3061 goto err_mal; 3062 rc = rgmii_init(); 3063 if (rc) 3064 goto err_zmii; 3065 rc = tah_init(); 3066 if (rc) 3067 goto err_rgmii; 3068 rc = platform_driver_register(&emac_driver); 3069 if (rc) 3070 goto err_tah; 3071 3072 return 0; 3073 3074 err_tah: 3075 tah_exit(); 3076 err_rgmii: 3077 rgmii_exit(); 3078 err_zmii: 3079 zmii_exit(); 3080 err_mal: 3081 mal_exit(); 3082 err: 3083 return rc; 3084 } 3085 3086 static void __exit emac_exit(void) 3087 { 3088 int i; 3089 3090 platform_driver_unregister(&emac_driver); 3091 3092 tah_exit(); 3093 rgmii_exit(); 3094 zmii_exit(); 3095 mal_exit(); 3096 emac_fini_debug(); 3097 3098 /* Destroy EMAC boot list */ 3099 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) 3100 of_node_put(emac_boot_list[i]); 3101 } 3102 3103 module_init(emac_init); 3104 module_exit(emac_exit); 3105