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/of_mdio.h> 46 #include <linux/slab.h> 47 48 #include <asm/processor.h> 49 #include <asm/io.h> 50 #include <asm/dma.h> 51 #include <linux/uaccess.h> 52 #include <asm/dcr.h> 53 #include <asm/dcr-regs.h> 54 55 #include "core.h" 56 57 /* 58 * Lack of dma_unmap_???? calls is intentional. 59 * 60 * API-correct usage requires additional support state information to be 61 * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to 62 * EMAC design (e.g. TX buffer passed from network stack can be split into 63 * several BDs, dma_map_single/dma_map_page can be used to map particular BD), 64 * maintaining such information will add additional overhead. 65 * Current DMA API implementation for 4xx processors only ensures cache coherency 66 * and dma_unmap_???? routines are empty and are likely to stay this way. 67 * I decided to omit dma_unmap_??? calls because I don't want to add additional 68 * complexity just for the sake of following some abstract API, when it doesn't 69 * add any real benefit to the driver. I understand that this decision maybe 70 * controversial, but I really tried to make code API-correct and efficient 71 * at the same time and didn't come up with code I liked :(. --ebs 72 */ 73 74 #define DRV_NAME "emac" 75 #define DRV_VERSION "3.54" 76 #define DRV_DESC "PPC 4xx OCP EMAC driver" 77 78 MODULE_DESCRIPTION(DRV_DESC); 79 MODULE_AUTHOR 80 ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); 81 MODULE_LICENSE("GPL"); 82 83 /* minimum number of free TX descriptors required to wake up TX process */ 84 #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) 85 86 /* If packet size is less than this number, we allocate small skb and copy packet 87 * contents into it instead of just sending original big skb up 88 */ 89 #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD 90 91 /* Since multiple EMACs share MDIO lines in various ways, we need 92 * to avoid re-using the same PHY ID in cases where the arch didn't 93 * setup precise phy_map entries 94 * 95 * XXX This is something that needs to be reworked as we can have multiple 96 * EMAC "sets" (multiple ASICs containing several EMACs) though we can 97 * probably require in that case to have explicit PHY IDs in the device-tree 98 */ 99 static u32 busy_phy_map; 100 static DEFINE_MUTEX(emac_phy_map_lock); 101 102 /* This is the wait queue used to wait on any event related to probe, that 103 * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc... 104 */ 105 static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait); 106 107 /* Having stable interface names is a doomed idea. However, it would be nice 108 * if we didn't have completely random interface names at boot too :-) It's 109 * just a matter of making everybody's life easier. Since we are doing 110 * threaded probing, it's a bit harder though. The base idea here is that 111 * we make up a list of all emacs in the device-tree before we register the 112 * driver. Every emac will then wait for the previous one in the list to 113 * initialize before itself. We should also keep that list ordered by 114 * cell_index. 115 * That list is only 4 entries long, meaning that additional EMACs don't 116 * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased. 117 */ 118 119 #define EMAC_BOOT_LIST_SIZE 4 120 static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE]; 121 122 /* How long should I wait for dependent devices ? */ 123 #define EMAC_PROBE_DEP_TIMEOUT (HZ * 5) 124 125 /* I don't want to litter system log with timeout errors 126 * when we have brain-damaged PHY. 127 */ 128 static inline void emac_report_timeout_error(struct emac_instance *dev, 129 const char *error) 130 { 131 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX | 132 EMAC_FTR_460EX_PHY_CLK_FIX | 133 EMAC_FTR_440EP_PHY_CLK_FIX)) 134 DBG(dev, "%s" NL, error); 135 else if (net_ratelimit()) 136 printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name, 137 error); 138 } 139 140 /* EMAC PHY clock workaround: 141 * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, 142 * which allows controlling each EMAC clock 143 */ 144 static inline void emac_rx_clk_tx(struct emac_instance *dev) 145 { 146 #ifdef CONFIG_PPC_DCR_NATIVE 147 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) 148 dcri_clrset(SDR0, SDR0_MFR, 149 0, SDR0_MFR_ECS >> dev->cell_index); 150 #endif 151 } 152 153 static inline void emac_rx_clk_default(struct emac_instance *dev) 154 { 155 #ifdef CONFIG_PPC_DCR_NATIVE 156 if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) 157 dcri_clrset(SDR0, SDR0_MFR, 158 SDR0_MFR_ECS >> dev->cell_index, 0); 159 #endif 160 } 161 162 /* PHY polling intervals */ 163 #define PHY_POLL_LINK_ON HZ 164 #define PHY_POLL_LINK_OFF (HZ / 5) 165 166 /* Graceful stop timeouts in us. 167 * We should allow up to 1 frame time (full-duplex, ignoring collisions) 168 */ 169 #define STOP_TIMEOUT_10 1230 170 #define STOP_TIMEOUT_100 124 171 #define STOP_TIMEOUT_1000 13 172 #define STOP_TIMEOUT_1000_JUMBO 73 173 174 static unsigned char default_mcast_addr[] = { 175 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 176 }; 177 178 /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ 179 static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { 180 "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", 181 "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", 182 "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", 183 "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", 184 "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", 185 "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", 186 "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", 187 "rx_bad_packet", "rx_runt_packet", "rx_short_event", 188 "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", 189 "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", 190 "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", 191 "tx_bd_excessive_collisions", "tx_bd_late_collision", 192 "tx_bd_multple_collisions", "tx_bd_single_collision", 193 "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", 194 "tx_errors" 195 }; 196 197 static irqreturn_t emac_irq(int irq, void *dev_instance); 198 static void emac_clean_tx_ring(struct emac_instance *dev); 199 static void __emac_set_multicast_list(struct emac_instance *dev); 200 201 static inline int emac_phy_supports_gige(int phy_mode) 202 { 203 return phy_mode == PHY_MODE_GMII || 204 phy_mode == PHY_MODE_RGMII || 205 phy_mode == PHY_MODE_SGMII || 206 phy_mode == PHY_MODE_TBI || 207 phy_mode == PHY_MODE_RTBI; 208 } 209 210 static inline int emac_phy_gpcs(int phy_mode) 211 { 212 return phy_mode == PHY_MODE_SGMII || 213 phy_mode == PHY_MODE_TBI || 214 phy_mode == PHY_MODE_RTBI; 215 } 216 217 static inline void emac_tx_enable(struct emac_instance *dev) 218 { 219 struct emac_regs __iomem *p = dev->emacp; 220 u32 r; 221 222 DBG(dev, "tx_enable" NL); 223 224 r = in_be32(&p->mr0); 225 if (!(r & EMAC_MR0_TXE)) 226 out_be32(&p->mr0, r | EMAC_MR0_TXE); 227 } 228 229 static void emac_tx_disable(struct emac_instance *dev) 230 { 231 struct emac_regs __iomem *p = dev->emacp; 232 u32 r; 233 234 DBG(dev, "tx_disable" NL); 235 236 r = in_be32(&p->mr0); 237 if (r & EMAC_MR0_TXE) { 238 int n = dev->stop_timeout; 239 out_be32(&p->mr0, r & ~EMAC_MR0_TXE); 240 while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { 241 udelay(1); 242 --n; 243 } 244 if (unlikely(!n)) 245 emac_report_timeout_error(dev, "TX disable timeout"); 246 } 247 } 248 249 static void emac_rx_enable(struct emac_instance *dev) 250 { 251 struct emac_regs __iomem *p = dev->emacp; 252 u32 r; 253 254 if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) 255 goto out; 256 257 DBG(dev, "rx_enable" NL); 258 259 r = in_be32(&p->mr0); 260 if (!(r & EMAC_MR0_RXE)) { 261 if (unlikely(!(r & EMAC_MR0_RXI))) { 262 /* Wait if previous async disable is still in progress */ 263 int n = dev->stop_timeout; 264 while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { 265 udelay(1); 266 --n; 267 } 268 if (unlikely(!n)) 269 emac_report_timeout_error(dev, 270 "RX disable timeout"); 271 } 272 out_be32(&p->mr0, r | EMAC_MR0_RXE); 273 } 274 out: 275 ; 276 } 277 278 static void emac_rx_disable(struct emac_instance *dev) 279 { 280 struct emac_regs __iomem *p = dev->emacp; 281 u32 r; 282 283 DBG(dev, "rx_disable" NL); 284 285 r = in_be32(&p->mr0); 286 if (r & EMAC_MR0_RXE) { 287 int n = dev->stop_timeout; 288 out_be32(&p->mr0, r & ~EMAC_MR0_RXE); 289 while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { 290 udelay(1); 291 --n; 292 } 293 if (unlikely(!n)) 294 emac_report_timeout_error(dev, "RX disable timeout"); 295 } 296 } 297 298 static inline void emac_netif_stop(struct emac_instance *dev) 299 { 300 netif_tx_lock_bh(dev->ndev); 301 netif_addr_lock(dev->ndev); 302 dev->no_mcast = 1; 303 netif_addr_unlock(dev->ndev); 304 netif_tx_unlock_bh(dev->ndev); 305 netif_trans_update(dev->ndev); /* prevent tx timeout */ 306 mal_poll_disable(dev->mal, &dev->commac); 307 netif_tx_disable(dev->ndev); 308 } 309 310 static inline void emac_netif_start(struct emac_instance *dev) 311 { 312 netif_tx_lock_bh(dev->ndev); 313 netif_addr_lock(dev->ndev); 314 dev->no_mcast = 0; 315 if (dev->mcast_pending && netif_running(dev->ndev)) 316 __emac_set_multicast_list(dev); 317 netif_addr_unlock(dev->ndev); 318 netif_tx_unlock_bh(dev->ndev); 319 320 netif_wake_queue(dev->ndev); 321 322 /* NOTE: unconditional netif_wake_queue is only appropriate 323 * so long as all callers are assured to have free tx slots 324 * (taken from tg3... though the case where that is wrong is 325 * not terribly harmful) 326 */ 327 mal_poll_enable(dev->mal, &dev->commac); 328 } 329 330 static inline void emac_rx_disable_async(struct emac_instance *dev) 331 { 332 struct emac_regs __iomem *p = dev->emacp; 333 u32 r; 334 335 DBG(dev, "rx_disable_async" NL); 336 337 r = in_be32(&p->mr0); 338 if (r & EMAC_MR0_RXE) 339 out_be32(&p->mr0, r & ~EMAC_MR0_RXE); 340 } 341 342 static int emac_reset(struct emac_instance *dev) 343 { 344 struct emac_regs __iomem *p = dev->emacp; 345 int n = 20; 346 347 DBG(dev, "reset" NL); 348 349 if (!dev->reset_failed) { 350 /* 40x erratum suggests stopping RX channel before reset, 351 * we stop TX as well 352 */ 353 emac_rx_disable(dev); 354 emac_tx_disable(dev); 355 } 356 357 #ifdef CONFIG_PPC_DCR_NATIVE 358 /* 359 * PPC460EX/GT Embedded Processor Advanced User's Manual 360 * section 28.10.1 Mode Register 0 (EMACx_MR0) states: 361 * Note: The PHY must provide a TX Clk in order to perform a soft reset 362 * of the EMAC. If none is present, select the internal clock 363 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1). 364 * After a soft reset, select the external clock. 365 */ 366 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { 367 if (dev->phy_address == 0xffffffff && 368 dev->phy_map == 0xffffffff) { 369 /* No PHY: select internal loop clock before reset */ 370 dcri_clrset(SDR0, SDR0_ETH_CFG, 371 0, SDR0_ETH_CFG_ECS << dev->cell_index); 372 } else { 373 /* PHY present: select external clock before reset */ 374 dcri_clrset(SDR0, SDR0_ETH_CFG, 375 SDR0_ETH_CFG_ECS << dev->cell_index, 0); 376 } 377 } 378 #endif 379 380 out_be32(&p->mr0, EMAC_MR0_SRST); 381 while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) 382 --n; 383 384 #ifdef CONFIG_PPC_DCR_NATIVE 385 if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) { 386 if (dev->phy_address == 0xffffffff && 387 dev->phy_map == 0xffffffff) { 388 /* No PHY: restore external clock source after reset */ 389 dcri_clrset(SDR0, SDR0_ETH_CFG, 390 SDR0_ETH_CFG_ECS << dev->cell_index, 0); 391 } 392 } 393 #endif 394 395 if (n) { 396 dev->reset_failed = 0; 397 return 0; 398 } else { 399 emac_report_timeout_error(dev, "reset timeout"); 400 dev->reset_failed = 1; 401 return -ETIMEDOUT; 402 } 403 } 404 405 static void emac_hash_mc(struct emac_instance *dev) 406 { 407 const int regs = EMAC_XAHT_REGS(dev); 408 u32 *gaht_base = emac_gaht_base(dev); 409 u32 gaht_temp[regs]; 410 struct netdev_hw_addr *ha; 411 int i; 412 413 DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev)); 414 415 memset(gaht_temp, 0, sizeof (gaht_temp)); 416 417 netdev_for_each_mc_addr(ha, dev->ndev) { 418 int slot, reg, mask; 419 DBG2(dev, "mc %pM" NL, ha->addr); 420 421 slot = EMAC_XAHT_CRC_TO_SLOT(dev, 422 ether_crc(ETH_ALEN, ha->addr)); 423 reg = EMAC_XAHT_SLOT_TO_REG(dev, slot); 424 mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot); 425 426 gaht_temp[reg] |= mask; 427 } 428 429 for (i = 0; i < regs; i++) 430 out_be32(gaht_base + i, gaht_temp[i]); 431 } 432 433 static inline u32 emac_iff2rmr(struct net_device *ndev) 434 { 435 struct emac_instance *dev = netdev_priv(ndev); 436 u32 r; 437 438 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE; 439 440 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 441 r |= EMAC4_RMR_BASE; 442 else 443 r |= EMAC_RMR_BASE; 444 445 if (ndev->flags & IFF_PROMISC) 446 r |= EMAC_RMR_PME; 447 else if (ndev->flags & IFF_ALLMULTI || 448 (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev))) 449 r |= EMAC_RMR_PMME; 450 else if (!netdev_mc_empty(ndev)) 451 r |= EMAC_RMR_MAE; 452 453 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { 454 r &= ~EMAC4_RMR_MJS_MASK; 455 r |= EMAC4_RMR_MJS(ndev->mtu); 456 } 457 458 return r; 459 } 460 461 static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 462 { 463 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT; 464 465 DBG2(dev, "__emac_calc_base_mr1" NL); 466 467 switch(tx_size) { 468 case 2048: 469 ret |= EMAC_MR1_TFS_2K; 470 break; 471 default: 472 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", 473 dev->ndev->name, tx_size); 474 } 475 476 switch(rx_size) { 477 case 16384: 478 ret |= EMAC_MR1_RFS_16K; 479 break; 480 case 4096: 481 ret |= EMAC_MR1_RFS_4K; 482 break; 483 default: 484 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", 485 dev->ndev->name, rx_size); 486 } 487 488 return ret; 489 } 490 491 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 492 { 493 u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR | 494 EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000); 495 496 DBG2(dev, "__emac4_calc_base_mr1" NL); 497 498 switch(tx_size) { 499 case 16384: 500 ret |= EMAC4_MR1_TFS_16K; 501 break; 502 case 4096: 503 ret |= EMAC4_MR1_TFS_4K; 504 break; 505 case 2048: 506 ret |= EMAC4_MR1_TFS_2K; 507 break; 508 default: 509 printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", 510 dev->ndev->name, tx_size); 511 } 512 513 switch(rx_size) { 514 case 16384: 515 ret |= EMAC4_MR1_RFS_16K; 516 break; 517 case 4096: 518 ret |= EMAC4_MR1_RFS_4K; 519 break; 520 case 2048: 521 ret |= EMAC4_MR1_RFS_2K; 522 break; 523 default: 524 printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", 525 dev->ndev->name, rx_size); 526 } 527 528 return ret; 529 } 530 531 static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) 532 { 533 return emac_has_feature(dev, EMAC_FTR_EMAC4) ? 534 __emac4_calc_base_mr1(dev, tx_size, rx_size) : 535 __emac_calc_base_mr1(dev, tx_size, rx_size); 536 } 537 538 static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size) 539 { 540 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 541 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4; 542 else 543 return ((size >> 6) - 1) << EMAC_TRTR_SHIFT; 544 } 545 546 static inline u32 emac_calc_rwmr(struct emac_instance *dev, 547 unsigned int low, unsigned int high) 548 { 549 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 550 return (low << 22) | ( (high & 0x3ff) << 6); 551 else 552 return (low << 23) | ( (high & 0x1ff) << 7); 553 } 554 555 static int emac_configure(struct emac_instance *dev) 556 { 557 struct emac_regs __iomem *p = dev->emacp; 558 struct net_device *ndev = dev->ndev; 559 int tx_size, rx_size, link = netif_carrier_ok(dev->ndev); 560 u32 r, mr1 = 0; 561 562 DBG(dev, "configure" NL); 563 564 if (!link) { 565 out_be32(&p->mr1, in_be32(&p->mr1) 566 | EMAC_MR1_FDE | EMAC_MR1_ILE); 567 udelay(100); 568 } else if (emac_reset(dev) < 0) 569 return -ETIMEDOUT; 570 571 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 572 tah_reset(dev->tah_dev); 573 574 DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n", 575 link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause); 576 577 /* Default fifo sizes */ 578 tx_size = dev->tx_fifo_size; 579 rx_size = dev->rx_fifo_size; 580 581 /* No link, force loopback */ 582 if (!link) 583 mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE; 584 585 /* Check for full duplex */ 586 else if (dev->phy.duplex == DUPLEX_FULL) 587 mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; 588 589 /* Adjust fifo sizes, mr1 and timeouts based on link speed */ 590 dev->stop_timeout = STOP_TIMEOUT_10; 591 switch (dev->phy.speed) { 592 case SPEED_1000: 593 if (emac_phy_gpcs(dev->phy.mode)) { 594 mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA( 595 (dev->phy.gpcs_address != 0xffffffff) ? 596 dev->phy.gpcs_address : dev->phy.address); 597 598 /* Put some arbitrary OUI, Manuf & Rev IDs so we can 599 * identify this GPCS PHY later. 600 */ 601 out_be32(&p->u1.emac4.ipcr, 0xdeadbeef); 602 } else 603 mr1 |= EMAC_MR1_MF_1000; 604 605 /* Extended fifo sizes */ 606 tx_size = dev->tx_fifo_size_gige; 607 rx_size = dev->rx_fifo_size_gige; 608 609 if (dev->ndev->mtu > ETH_DATA_LEN) { 610 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 611 mr1 |= EMAC4_MR1_JPSM; 612 else 613 mr1 |= EMAC_MR1_JPSM; 614 dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; 615 } else 616 dev->stop_timeout = STOP_TIMEOUT_1000; 617 break; 618 case SPEED_100: 619 mr1 |= EMAC_MR1_MF_100; 620 dev->stop_timeout = STOP_TIMEOUT_100; 621 break; 622 default: /* make gcc happy */ 623 break; 624 } 625 626 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 627 rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port, 628 dev->phy.speed); 629 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 630 zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed); 631 632 /* on 40x erratum forces us to NOT use integrated flow control, 633 * let's hope it works on 44x ;) 634 */ 635 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) && 636 dev->phy.duplex == DUPLEX_FULL) { 637 if (dev->phy.pause) 638 mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP; 639 else if (dev->phy.asym_pause) 640 mr1 |= EMAC_MR1_APP; 641 } 642 643 /* Add base settings & fifo sizes & program MR1 */ 644 mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size); 645 out_be32(&p->mr1, mr1); 646 647 /* Set individual MAC address */ 648 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); 649 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | 650 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | 651 ndev->dev_addr[5]); 652 653 /* VLAN Tag Protocol ID */ 654 out_be32(&p->vtpid, 0x8100); 655 656 /* Receive mode register */ 657 r = emac_iff2rmr(ndev); 658 if (r & EMAC_RMR_MAE) 659 emac_hash_mc(dev); 660 out_be32(&p->rmr, r); 661 662 /* FIFOs thresholds */ 663 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 664 r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, 665 tx_size / 2 / dev->fifo_entry_size); 666 else 667 r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, 668 tx_size / 2 / dev->fifo_entry_size); 669 out_be32(&p->tmr1, r); 670 out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2)); 671 672 /* PAUSE frame is sent when RX FIFO reaches its high-water mark, 673 there should be still enough space in FIFO to allow the our link 674 partner time to process this frame and also time to send PAUSE 675 frame itself. 676 677 Here is the worst case scenario for the RX FIFO "headroom" 678 (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): 679 680 1) One maximum-length frame on TX 1522 bytes 681 2) One PAUSE frame time 64 bytes 682 3) PAUSE frame decode time allowance 64 bytes 683 4) One maximum-length frame on RX 1522 bytes 684 5) Round-trip propagation delay of the link (100Mb) 15 bytes 685 ---------- 686 3187 bytes 687 688 I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) 689 low-water mark to RX_FIFO_SIZE / 8 (512 bytes) 690 */ 691 r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size, 692 rx_size / 4 / dev->fifo_entry_size); 693 out_be32(&p->rwmr, r); 694 695 /* Set PAUSE timer to the maximum */ 696 out_be32(&p->ptr, 0xffff); 697 698 /* IRQ sources */ 699 r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | 700 EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | 701 EMAC_ISR_IRE | EMAC_ISR_TE; 702 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 703 r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE | 704 EMAC4_ISR_RXOE | */; 705 out_be32(&p->iser, r); 706 707 /* We need to take GPCS PHY out of isolate mode after EMAC reset */ 708 if (emac_phy_gpcs(dev->phy.mode)) { 709 if (dev->phy.gpcs_address != 0xffffffff) 710 emac_mii_reset_gpcs(&dev->phy); 711 else 712 emac_mii_reset_phy(&dev->phy); 713 } 714 715 return 0; 716 } 717 718 static void emac_reinitialize(struct emac_instance *dev) 719 { 720 DBG(dev, "reinitialize" NL); 721 722 emac_netif_stop(dev); 723 if (!emac_configure(dev)) { 724 emac_tx_enable(dev); 725 emac_rx_enable(dev); 726 } 727 emac_netif_start(dev); 728 } 729 730 static void emac_full_tx_reset(struct emac_instance *dev) 731 { 732 DBG(dev, "full_tx_reset" NL); 733 734 emac_tx_disable(dev); 735 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); 736 emac_clean_tx_ring(dev); 737 dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; 738 739 emac_configure(dev); 740 741 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); 742 emac_tx_enable(dev); 743 emac_rx_enable(dev); 744 } 745 746 static void emac_reset_work(struct work_struct *work) 747 { 748 struct emac_instance *dev = container_of(work, struct emac_instance, reset_work); 749 750 DBG(dev, "reset_work" NL); 751 752 mutex_lock(&dev->link_lock); 753 if (dev->opened) { 754 emac_netif_stop(dev); 755 emac_full_tx_reset(dev); 756 emac_netif_start(dev); 757 } 758 mutex_unlock(&dev->link_lock); 759 } 760 761 static void emac_tx_timeout(struct net_device *ndev) 762 { 763 struct emac_instance *dev = netdev_priv(ndev); 764 765 DBG(dev, "tx_timeout" NL); 766 767 schedule_work(&dev->reset_work); 768 } 769 770 771 static inline int emac_phy_done(struct emac_instance *dev, u32 stacr) 772 { 773 int done = !!(stacr & EMAC_STACR_OC); 774 775 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 776 done = !done; 777 778 return done; 779 }; 780 781 static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg) 782 { 783 struct emac_regs __iomem *p = dev->emacp; 784 u32 r = 0; 785 int n, err = -ETIMEDOUT; 786 787 mutex_lock(&dev->mdio_lock); 788 789 DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg); 790 791 /* Enable proper MDIO port */ 792 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 793 zmii_get_mdio(dev->zmii_dev, dev->zmii_port); 794 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 795 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); 796 797 /* Wait for management interface to become idle */ 798 n = 20; 799 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 800 udelay(1); 801 if (!--n) { 802 DBG2(dev, " -> timeout wait idle\n"); 803 goto bail; 804 } 805 } 806 807 /* Issue read command */ 808 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 809 r = EMAC4_STACR_BASE(dev->opb_bus_freq); 810 else 811 r = EMAC_STACR_BASE(dev->opb_bus_freq); 812 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 813 r |= EMAC_STACR_OC; 814 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) 815 r |= EMACX_STACR_STAC_READ; 816 else 817 r |= EMAC_STACR_STAC_READ; 818 r |= (reg & EMAC_STACR_PRA_MASK) 819 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT); 820 out_be32(&p->stacr, r); 821 822 /* Wait for read to complete */ 823 n = 200; 824 while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) { 825 udelay(1); 826 if (!--n) { 827 DBG2(dev, " -> timeout wait complete\n"); 828 goto bail; 829 } 830 } 831 832 if (unlikely(r & EMAC_STACR_PHYE)) { 833 DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg); 834 err = -EREMOTEIO; 835 goto bail; 836 } 837 838 r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); 839 840 DBG2(dev, "mdio_read -> %04x" NL, r); 841 err = 0; 842 bail: 843 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 844 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); 845 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 846 zmii_put_mdio(dev->zmii_dev, dev->zmii_port); 847 mutex_unlock(&dev->mdio_lock); 848 849 return err == 0 ? r : err; 850 } 851 852 static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg, 853 u16 val) 854 { 855 struct emac_regs __iomem *p = dev->emacp; 856 u32 r = 0; 857 int n, err = -ETIMEDOUT; 858 859 mutex_lock(&dev->mdio_lock); 860 861 DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val); 862 863 /* Enable proper MDIO port */ 864 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 865 zmii_get_mdio(dev->zmii_dev, dev->zmii_port); 866 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 867 rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); 868 869 /* Wait for management interface to be idle */ 870 n = 20; 871 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 872 udelay(1); 873 if (!--n) { 874 DBG2(dev, " -> timeout wait idle\n"); 875 goto bail; 876 } 877 } 878 879 /* Issue write command */ 880 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 881 r = EMAC4_STACR_BASE(dev->opb_bus_freq); 882 else 883 r = EMAC_STACR_BASE(dev->opb_bus_freq); 884 if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) 885 r |= EMAC_STACR_OC; 886 if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) 887 r |= EMACX_STACR_STAC_WRITE; 888 else 889 r |= EMAC_STACR_STAC_WRITE; 890 r |= (reg & EMAC_STACR_PRA_MASK) | 891 ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | 892 (val << EMAC_STACR_PHYD_SHIFT); 893 out_be32(&p->stacr, r); 894 895 /* Wait for write to complete */ 896 n = 200; 897 while (!emac_phy_done(dev, in_be32(&p->stacr))) { 898 udelay(1); 899 if (!--n) { 900 DBG2(dev, " -> timeout wait complete\n"); 901 goto bail; 902 } 903 } 904 err = 0; 905 bail: 906 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 907 rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); 908 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 909 zmii_put_mdio(dev->zmii_dev, dev->zmii_port); 910 mutex_unlock(&dev->mdio_lock); 911 } 912 913 static int emac_mdio_read(struct net_device *ndev, int id, int reg) 914 { 915 struct emac_instance *dev = netdev_priv(ndev); 916 int res; 917 918 res = __emac_mdio_read((dev->mdio_instance && 919 dev->phy.gpcs_address != id) ? 920 dev->mdio_instance : dev, 921 (u8) id, (u8) reg); 922 return res; 923 } 924 925 static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) 926 { 927 struct emac_instance *dev = netdev_priv(ndev); 928 929 __emac_mdio_write((dev->mdio_instance && 930 dev->phy.gpcs_address != id) ? 931 dev->mdio_instance : dev, 932 (u8) id, (u8) reg, (u16) val); 933 } 934 935 /* Tx lock BH */ 936 static void __emac_set_multicast_list(struct emac_instance *dev) 937 { 938 struct emac_regs __iomem *p = dev->emacp; 939 u32 rmr = emac_iff2rmr(dev->ndev); 940 941 DBG(dev, "__multicast %08x" NL, rmr); 942 943 /* I decided to relax register access rules here to avoid 944 * full EMAC reset. 945 * 946 * There is a real problem with EMAC4 core if we use MWSW_001 bit 947 * in MR1 register and do a full EMAC reset. 948 * One TX BD status update is delayed and, after EMAC reset, it 949 * never happens, resulting in TX hung (it'll be recovered by TX 950 * timeout handler eventually, but this is just gross). 951 * So we either have to do full TX reset or try to cheat here :) 952 * 953 * The only required change is to RX mode register, so I *think* all 954 * we need is just to stop RX channel. This seems to work on all 955 * tested SoCs. --ebs 956 * 957 * If we need the full reset, we might just trigger the workqueue 958 * and do it async... a bit nasty but should work --BenH 959 */ 960 dev->mcast_pending = 0; 961 emac_rx_disable(dev); 962 if (rmr & EMAC_RMR_MAE) 963 emac_hash_mc(dev); 964 out_be32(&p->rmr, rmr); 965 emac_rx_enable(dev); 966 } 967 968 /* Tx lock BH */ 969 static void emac_set_multicast_list(struct net_device *ndev) 970 { 971 struct emac_instance *dev = netdev_priv(ndev); 972 973 DBG(dev, "multicast" NL); 974 975 BUG_ON(!netif_running(dev->ndev)); 976 977 if (dev->no_mcast) { 978 dev->mcast_pending = 1; 979 return; 980 } 981 982 mutex_lock(&dev->link_lock); 983 __emac_set_multicast_list(dev); 984 mutex_unlock(&dev->link_lock); 985 } 986 987 static int emac_set_mac_address(struct net_device *ndev, void *sa) 988 { 989 struct emac_instance *dev = netdev_priv(ndev); 990 struct sockaddr *addr = sa; 991 struct emac_regs __iomem *p = dev->emacp; 992 993 if (!is_valid_ether_addr(addr->sa_data)) 994 return -EADDRNOTAVAIL; 995 996 mutex_lock(&dev->link_lock); 997 998 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); 999 1000 emac_rx_disable(dev); 1001 emac_tx_disable(dev); 1002 out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); 1003 out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | 1004 (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | 1005 ndev->dev_addr[5]); 1006 emac_tx_enable(dev); 1007 emac_rx_enable(dev); 1008 1009 mutex_unlock(&dev->link_lock); 1010 1011 return 0; 1012 } 1013 1014 static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) 1015 { 1016 int rx_sync_size = emac_rx_sync_size(new_mtu); 1017 int rx_skb_size = emac_rx_skb_size(new_mtu); 1018 int i, ret = 0; 1019 int mr1_jumbo_bit_change = 0; 1020 1021 mutex_lock(&dev->link_lock); 1022 emac_netif_stop(dev); 1023 emac_rx_disable(dev); 1024 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); 1025 1026 if (dev->rx_sg_skb) { 1027 ++dev->estats.rx_dropped_resize; 1028 dev_kfree_skb(dev->rx_sg_skb); 1029 dev->rx_sg_skb = NULL; 1030 } 1031 1032 /* Make a first pass over RX ring and mark BDs ready, dropping 1033 * non-processed packets on the way. We need this as a separate pass 1034 * to simplify error recovery in the case of allocation failure later. 1035 */ 1036 for (i = 0; i < NUM_RX_BUFF; ++i) { 1037 if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) 1038 ++dev->estats.rx_dropped_resize; 1039 1040 dev->rx_desc[i].data_len = 0; 1041 dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | 1042 (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1043 } 1044 1045 /* Reallocate RX ring only if bigger skb buffers are required */ 1046 if (rx_skb_size <= dev->rx_skb_size) 1047 goto skip; 1048 1049 /* Second pass, allocate new skbs */ 1050 for (i = 0; i < NUM_RX_BUFF; ++i) { 1051 struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); 1052 if (!skb) { 1053 ret = -ENOMEM; 1054 goto oom; 1055 } 1056 1057 BUG_ON(!dev->rx_skb[i]); 1058 dev_kfree_skb(dev->rx_skb[i]); 1059 1060 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); 1061 dev->rx_desc[i].data_ptr = 1062 dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size, 1063 DMA_FROM_DEVICE) + 2; 1064 dev->rx_skb[i] = skb; 1065 } 1066 skip: 1067 /* Check if we need to change "Jumbo" bit in MR1 */ 1068 if (emac_has_feature(dev, EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE)) { 1069 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) || 1070 (dev->ndev->mtu > ETH_DATA_LEN); 1071 } else { 1072 mr1_jumbo_bit_change = (new_mtu > ETH_DATA_LEN) ^ 1073 (dev->ndev->mtu > ETH_DATA_LEN); 1074 } 1075 1076 if (mr1_jumbo_bit_change) { 1077 /* This is to prevent starting RX channel in emac_rx_enable() */ 1078 set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1079 1080 dev->ndev->mtu = new_mtu; 1081 emac_full_tx_reset(dev); 1082 } 1083 1084 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu)); 1085 oom: 1086 /* Restart RX */ 1087 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1088 dev->rx_slot = 0; 1089 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1090 emac_rx_enable(dev); 1091 emac_netif_start(dev); 1092 mutex_unlock(&dev->link_lock); 1093 1094 return ret; 1095 } 1096 1097 /* Process ctx, rtnl_lock semaphore */ 1098 static int emac_change_mtu(struct net_device *ndev, int new_mtu) 1099 { 1100 struct emac_instance *dev = netdev_priv(ndev); 1101 int ret = 0; 1102 1103 DBG(dev, "change_mtu(%d)" NL, new_mtu); 1104 1105 if (netif_running(ndev)) { 1106 /* Check if we really need to reinitialize RX ring */ 1107 if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) 1108 ret = emac_resize_rx_ring(dev, new_mtu); 1109 } 1110 1111 if (!ret) { 1112 ndev->mtu = new_mtu; 1113 dev->rx_skb_size = emac_rx_skb_size(new_mtu); 1114 dev->rx_sync_size = emac_rx_sync_size(new_mtu); 1115 } 1116 1117 return ret; 1118 } 1119 1120 static void emac_clean_tx_ring(struct emac_instance *dev) 1121 { 1122 int i; 1123 1124 for (i = 0; i < NUM_TX_BUFF; ++i) { 1125 if (dev->tx_skb[i]) { 1126 dev_kfree_skb(dev->tx_skb[i]); 1127 dev->tx_skb[i] = NULL; 1128 if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) 1129 ++dev->estats.tx_dropped; 1130 } 1131 dev->tx_desc[i].ctrl = 0; 1132 dev->tx_desc[i].data_ptr = 0; 1133 } 1134 } 1135 1136 static void emac_clean_rx_ring(struct emac_instance *dev) 1137 { 1138 int i; 1139 1140 for (i = 0; i < NUM_RX_BUFF; ++i) 1141 if (dev->rx_skb[i]) { 1142 dev->rx_desc[i].ctrl = 0; 1143 dev_kfree_skb(dev->rx_skb[i]); 1144 dev->rx_skb[i] = NULL; 1145 dev->rx_desc[i].data_ptr = 0; 1146 } 1147 1148 if (dev->rx_sg_skb) { 1149 dev_kfree_skb(dev->rx_sg_skb); 1150 dev->rx_sg_skb = NULL; 1151 } 1152 } 1153 1154 static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot, 1155 gfp_t flags) 1156 { 1157 struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); 1158 if (unlikely(!skb)) 1159 return -ENOMEM; 1160 1161 dev->rx_skb[slot] = skb; 1162 dev->rx_desc[slot].data_len = 0; 1163 1164 skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); 1165 dev->rx_desc[slot].data_ptr = 1166 dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size, 1167 DMA_FROM_DEVICE) + 2; 1168 wmb(); 1169 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | 1170 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1171 1172 return 0; 1173 } 1174 1175 static void emac_print_link_status(struct emac_instance *dev) 1176 { 1177 if (netif_carrier_ok(dev->ndev)) 1178 printk(KERN_INFO "%s: link is up, %d %s%s\n", 1179 dev->ndev->name, dev->phy.speed, 1180 dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", 1181 dev->phy.pause ? ", pause enabled" : 1182 dev->phy.asym_pause ? ", asymmetric pause enabled" : ""); 1183 else 1184 printk(KERN_INFO "%s: link is down\n", dev->ndev->name); 1185 } 1186 1187 /* Process ctx, rtnl_lock semaphore */ 1188 static int emac_open(struct net_device *ndev) 1189 { 1190 struct emac_instance *dev = netdev_priv(ndev); 1191 int err, i; 1192 1193 DBG(dev, "open" NL); 1194 1195 /* Setup error IRQ handler */ 1196 err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev); 1197 if (err) { 1198 printk(KERN_ERR "%s: failed to request IRQ %d\n", 1199 ndev->name, dev->emac_irq); 1200 return err; 1201 } 1202 1203 /* Allocate RX ring */ 1204 for (i = 0; i < NUM_RX_BUFF; ++i) 1205 if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { 1206 printk(KERN_ERR "%s: failed to allocate RX ring\n", 1207 ndev->name); 1208 goto oom; 1209 } 1210 1211 dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0; 1212 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1213 dev->rx_sg_skb = NULL; 1214 1215 mutex_lock(&dev->link_lock); 1216 dev->opened = 1; 1217 1218 /* Start PHY polling now. 1219 */ 1220 if (dev->phy.address >= 0) { 1221 int link_poll_interval; 1222 if (dev->phy.def->ops->poll_link(&dev->phy)) { 1223 dev->phy.def->ops->read_link(&dev->phy); 1224 emac_rx_clk_default(dev); 1225 netif_carrier_on(dev->ndev); 1226 link_poll_interval = PHY_POLL_LINK_ON; 1227 } else { 1228 emac_rx_clk_tx(dev); 1229 netif_carrier_off(dev->ndev); 1230 link_poll_interval = PHY_POLL_LINK_OFF; 1231 } 1232 dev->link_polling = 1; 1233 wmb(); 1234 schedule_delayed_work(&dev->link_work, link_poll_interval); 1235 emac_print_link_status(dev); 1236 } else 1237 netif_carrier_on(dev->ndev); 1238 1239 /* Required for Pause packet support in EMAC */ 1240 dev_mc_add_global(ndev, default_mcast_addr); 1241 1242 emac_configure(dev); 1243 mal_poll_add(dev->mal, &dev->commac); 1244 mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); 1245 mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu)); 1246 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1247 emac_tx_enable(dev); 1248 emac_rx_enable(dev); 1249 emac_netif_start(dev); 1250 1251 mutex_unlock(&dev->link_lock); 1252 1253 return 0; 1254 oom: 1255 emac_clean_rx_ring(dev); 1256 free_irq(dev->emac_irq, dev); 1257 1258 return -ENOMEM; 1259 } 1260 1261 /* BHs disabled */ 1262 #if 0 1263 static int emac_link_differs(struct emac_instance *dev) 1264 { 1265 u32 r = in_be32(&dev->emacp->mr1); 1266 1267 int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; 1268 int speed, pause, asym_pause; 1269 1270 if (r & EMAC_MR1_MF_1000) 1271 speed = SPEED_1000; 1272 else if (r & EMAC_MR1_MF_100) 1273 speed = SPEED_100; 1274 else 1275 speed = SPEED_10; 1276 1277 switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { 1278 case (EMAC_MR1_EIFC | EMAC_MR1_APP): 1279 pause = 1; 1280 asym_pause = 0; 1281 break; 1282 case EMAC_MR1_APP: 1283 pause = 0; 1284 asym_pause = 1; 1285 break; 1286 default: 1287 pause = asym_pause = 0; 1288 } 1289 return speed != dev->phy.speed || duplex != dev->phy.duplex || 1290 pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; 1291 } 1292 #endif 1293 1294 static void emac_link_timer(struct work_struct *work) 1295 { 1296 struct emac_instance *dev = 1297 container_of(to_delayed_work(work), 1298 struct emac_instance, link_work); 1299 int link_poll_interval; 1300 1301 mutex_lock(&dev->link_lock); 1302 DBG2(dev, "link timer" NL); 1303 1304 if (!dev->opened) 1305 goto bail; 1306 1307 if (dev->phy.def->ops->poll_link(&dev->phy)) { 1308 if (!netif_carrier_ok(dev->ndev)) { 1309 emac_rx_clk_default(dev); 1310 /* Get new link parameters */ 1311 dev->phy.def->ops->read_link(&dev->phy); 1312 1313 netif_carrier_on(dev->ndev); 1314 emac_netif_stop(dev); 1315 emac_full_tx_reset(dev); 1316 emac_netif_start(dev); 1317 emac_print_link_status(dev); 1318 } 1319 link_poll_interval = PHY_POLL_LINK_ON; 1320 } else { 1321 if (netif_carrier_ok(dev->ndev)) { 1322 emac_rx_clk_tx(dev); 1323 netif_carrier_off(dev->ndev); 1324 netif_tx_disable(dev->ndev); 1325 emac_reinitialize(dev); 1326 emac_print_link_status(dev); 1327 } 1328 link_poll_interval = PHY_POLL_LINK_OFF; 1329 } 1330 schedule_delayed_work(&dev->link_work, link_poll_interval); 1331 bail: 1332 mutex_unlock(&dev->link_lock); 1333 } 1334 1335 static void emac_force_link_update(struct emac_instance *dev) 1336 { 1337 netif_carrier_off(dev->ndev); 1338 smp_rmb(); 1339 if (dev->link_polling) { 1340 cancel_delayed_work_sync(&dev->link_work); 1341 if (dev->link_polling) 1342 schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF); 1343 } 1344 } 1345 1346 /* Process ctx, rtnl_lock semaphore */ 1347 static int emac_close(struct net_device *ndev) 1348 { 1349 struct emac_instance *dev = netdev_priv(ndev); 1350 1351 DBG(dev, "close" NL); 1352 1353 if (dev->phy.address >= 0) { 1354 dev->link_polling = 0; 1355 cancel_delayed_work_sync(&dev->link_work); 1356 } 1357 mutex_lock(&dev->link_lock); 1358 emac_netif_stop(dev); 1359 dev->opened = 0; 1360 mutex_unlock(&dev->link_lock); 1361 1362 emac_rx_disable(dev); 1363 emac_tx_disable(dev); 1364 mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); 1365 mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); 1366 mal_poll_del(dev->mal, &dev->commac); 1367 1368 emac_clean_tx_ring(dev); 1369 emac_clean_rx_ring(dev); 1370 1371 free_irq(dev->emac_irq, dev); 1372 1373 netif_carrier_off(ndev); 1374 1375 return 0; 1376 } 1377 1378 static inline u16 emac_tx_csum(struct emac_instance *dev, 1379 struct sk_buff *skb) 1380 { 1381 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && 1382 (skb->ip_summed == CHECKSUM_PARTIAL)) { 1383 ++dev->stats.tx_packets_csum; 1384 return EMAC_TX_CTRL_TAH_CSUM; 1385 } 1386 return 0; 1387 } 1388 1389 static inline int emac_xmit_finish(struct emac_instance *dev, int len) 1390 { 1391 struct emac_regs __iomem *p = dev->emacp; 1392 struct net_device *ndev = dev->ndev; 1393 1394 /* Send the packet out. If the if makes a significant perf 1395 * difference, then we can store the TMR0 value in "dev" 1396 * instead 1397 */ 1398 if (emac_has_feature(dev, EMAC_FTR_EMAC4)) 1399 out_be32(&p->tmr0, EMAC4_TMR0_XMIT); 1400 else 1401 out_be32(&p->tmr0, EMAC_TMR0_XMIT); 1402 1403 if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { 1404 netif_stop_queue(ndev); 1405 DBG2(dev, "stopped TX queue" NL); 1406 } 1407 1408 netif_trans_update(ndev); 1409 ++dev->stats.tx_packets; 1410 dev->stats.tx_bytes += len; 1411 1412 return NETDEV_TX_OK; 1413 } 1414 1415 /* Tx lock BH */ 1416 static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) 1417 { 1418 struct emac_instance *dev = netdev_priv(ndev); 1419 unsigned int len = skb->len; 1420 int slot; 1421 1422 u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | 1423 MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); 1424 1425 slot = dev->tx_slot++; 1426 if (dev->tx_slot == NUM_TX_BUFF) { 1427 dev->tx_slot = 0; 1428 ctrl |= MAL_TX_CTRL_WRAP; 1429 } 1430 1431 DBG2(dev, "xmit(%u) %d" NL, len, slot); 1432 1433 dev->tx_skb[slot] = skb; 1434 dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev, 1435 skb->data, len, 1436 DMA_TO_DEVICE); 1437 dev->tx_desc[slot].data_len = (u16) len; 1438 wmb(); 1439 dev->tx_desc[slot].ctrl = ctrl; 1440 1441 return emac_xmit_finish(dev, len); 1442 } 1443 1444 static inline int emac_xmit_split(struct emac_instance *dev, int slot, 1445 u32 pd, int len, int last, u16 base_ctrl) 1446 { 1447 while (1) { 1448 u16 ctrl = base_ctrl; 1449 int chunk = min(len, MAL_MAX_TX_SIZE); 1450 len -= chunk; 1451 1452 slot = (slot + 1) % NUM_TX_BUFF; 1453 1454 if (last && !len) 1455 ctrl |= MAL_TX_CTRL_LAST; 1456 if (slot == NUM_TX_BUFF - 1) 1457 ctrl |= MAL_TX_CTRL_WRAP; 1458 1459 dev->tx_skb[slot] = NULL; 1460 dev->tx_desc[slot].data_ptr = pd; 1461 dev->tx_desc[slot].data_len = (u16) chunk; 1462 dev->tx_desc[slot].ctrl = ctrl; 1463 ++dev->tx_cnt; 1464 1465 if (!len) 1466 break; 1467 1468 pd += chunk; 1469 } 1470 return slot; 1471 } 1472 1473 /* Tx lock BH disabled (SG version for TAH equipped EMACs) */ 1474 static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) 1475 { 1476 struct emac_instance *dev = netdev_priv(ndev); 1477 int nr_frags = skb_shinfo(skb)->nr_frags; 1478 int len = skb->len, chunk; 1479 int slot, i; 1480 u16 ctrl; 1481 u32 pd; 1482 1483 /* This is common "fast" path */ 1484 if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) 1485 return emac_start_xmit(skb, ndev); 1486 1487 len -= skb->data_len; 1488 1489 /* Note, this is only an *estimation*, we can still run out of empty 1490 * slots because of the additional fragmentation into 1491 * MAL_MAX_TX_SIZE-sized chunks 1492 */ 1493 if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) 1494 goto stop_queue; 1495 1496 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | 1497 emac_tx_csum(dev, skb); 1498 slot = dev->tx_slot; 1499 1500 /* skb data */ 1501 dev->tx_skb[slot] = NULL; 1502 chunk = min(len, MAL_MAX_TX_SIZE); 1503 dev->tx_desc[slot].data_ptr = pd = 1504 dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE); 1505 dev->tx_desc[slot].data_len = (u16) chunk; 1506 len -= chunk; 1507 if (unlikely(len)) 1508 slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, 1509 ctrl); 1510 /* skb fragments */ 1511 for (i = 0; i < nr_frags; ++i) { 1512 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; 1513 len = skb_frag_size(frag); 1514 1515 if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) 1516 goto undo_frame; 1517 1518 pd = skb_frag_dma_map(&dev->ofdev->dev, frag, 0, len, 1519 DMA_TO_DEVICE); 1520 1521 slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, 1522 ctrl); 1523 } 1524 1525 DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot); 1526 1527 /* Attach skb to the last slot so we don't release it too early */ 1528 dev->tx_skb[slot] = skb; 1529 1530 /* Send the packet out */ 1531 if (dev->tx_slot == NUM_TX_BUFF - 1) 1532 ctrl |= MAL_TX_CTRL_WRAP; 1533 wmb(); 1534 dev->tx_desc[dev->tx_slot].ctrl = ctrl; 1535 dev->tx_slot = (slot + 1) % NUM_TX_BUFF; 1536 1537 return emac_xmit_finish(dev, skb->len); 1538 1539 undo_frame: 1540 /* Well, too bad. Our previous estimation was overly optimistic. 1541 * Undo everything. 1542 */ 1543 while (slot != dev->tx_slot) { 1544 dev->tx_desc[slot].ctrl = 0; 1545 --dev->tx_cnt; 1546 if (--slot < 0) 1547 slot = NUM_TX_BUFF - 1; 1548 } 1549 ++dev->estats.tx_undo; 1550 1551 stop_queue: 1552 netif_stop_queue(ndev); 1553 DBG2(dev, "stopped TX queue" NL); 1554 return NETDEV_TX_BUSY; 1555 } 1556 1557 /* Tx lock BHs */ 1558 static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) 1559 { 1560 struct emac_error_stats *st = &dev->estats; 1561 1562 DBG(dev, "BD TX error %04x" NL, ctrl); 1563 1564 ++st->tx_bd_errors; 1565 if (ctrl & EMAC_TX_ST_BFCS) 1566 ++st->tx_bd_bad_fcs; 1567 if (ctrl & EMAC_TX_ST_LCS) 1568 ++st->tx_bd_carrier_loss; 1569 if (ctrl & EMAC_TX_ST_ED) 1570 ++st->tx_bd_excessive_deferral; 1571 if (ctrl & EMAC_TX_ST_EC) 1572 ++st->tx_bd_excessive_collisions; 1573 if (ctrl & EMAC_TX_ST_LC) 1574 ++st->tx_bd_late_collision; 1575 if (ctrl & EMAC_TX_ST_MC) 1576 ++st->tx_bd_multple_collisions; 1577 if (ctrl & EMAC_TX_ST_SC) 1578 ++st->tx_bd_single_collision; 1579 if (ctrl & EMAC_TX_ST_UR) 1580 ++st->tx_bd_underrun; 1581 if (ctrl & EMAC_TX_ST_SQE) 1582 ++st->tx_bd_sqe; 1583 } 1584 1585 static void emac_poll_tx(void *param) 1586 { 1587 struct emac_instance *dev = param; 1588 u32 bad_mask; 1589 1590 DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot); 1591 1592 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 1593 bad_mask = EMAC_IS_BAD_TX_TAH; 1594 else 1595 bad_mask = EMAC_IS_BAD_TX; 1596 1597 netif_tx_lock_bh(dev->ndev); 1598 if (dev->tx_cnt) { 1599 u16 ctrl; 1600 int slot = dev->ack_slot, n = 0; 1601 again: 1602 ctrl = dev->tx_desc[slot].ctrl; 1603 if (!(ctrl & MAL_TX_CTRL_READY)) { 1604 struct sk_buff *skb = dev->tx_skb[slot]; 1605 ++n; 1606 1607 if (skb) { 1608 dev_kfree_skb(skb); 1609 dev->tx_skb[slot] = NULL; 1610 } 1611 slot = (slot + 1) % NUM_TX_BUFF; 1612 1613 if (unlikely(ctrl & bad_mask)) 1614 emac_parse_tx_error(dev, ctrl); 1615 1616 if (--dev->tx_cnt) 1617 goto again; 1618 } 1619 if (n) { 1620 dev->ack_slot = slot; 1621 if (netif_queue_stopped(dev->ndev) && 1622 dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) 1623 netif_wake_queue(dev->ndev); 1624 1625 DBG2(dev, "tx %d pkts" NL, n); 1626 } 1627 } 1628 netif_tx_unlock_bh(dev->ndev); 1629 } 1630 1631 static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot, 1632 int len) 1633 { 1634 struct sk_buff *skb = dev->rx_skb[slot]; 1635 1636 DBG2(dev, "recycle %d %d" NL, slot, len); 1637 1638 if (len) 1639 dma_map_single(&dev->ofdev->dev, skb->data - 2, 1640 EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); 1641 1642 dev->rx_desc[slot].data_len = 0; 1643 wmb(); 1644 dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | 1645 (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); 1646 } 1647 1648 static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl) 1649 { 1650 struct emac_error_stats *st = &dev->estats; 1651 1652 DBG(dev, "BD RX error %04x" NL, ctrl); 1653 1654 ++st->rx_bd_errors; 1655 if (ctrl & EMAC_RX_ST_OE) 1656 ++st->rx_bd_overrun; 1657 if (ctrl & EMAC_RX_ST_BP) 1658 ++st->rx_bd_bad_packet; 1659 if (ctrl & EMAC_RX_ST_RP) 1660 ++st->rx_bd_runt_packet; 1661 if (ctrl & EMAC_RX_ST_SE) 1662 ++st->rx_bd_short_event; 1663 if (ctrl & EMAC_RX_ST_AE) 1664 ++st->rx_bd_alignment_error; 1665 if (ctrl & EMAC_RX_ST_BFCS) 1666 ++st->rx_bd_bad_fcs; 1667 if (ctrl & EMAC_RX_ST_PTL) 1668 ++st->rx_bd_packet_too_long; 1669 if (ctrl & EMAC_RX_ST_ORE) 1670 ++st->rx_bd_out_of_range; 1671 if (ctrl & EMAC_RX_ST_IRE) 1672 ++st->rx_bd_in_range; 1673 } 1674 1675 static inline void emac_rx_csum(struct emac_instance *dev, 1676 struct sk_buff *skb, u16 ctrl) 1677 { 1678 #ifdef CONFIG_IBM_EMAC_TAH 1679 if (!ctrl && dev->tah_dev) { 1680 skb->ip_summed = CHECKSUM_UNNECESSARY; 1681 ++dev->stats.rx_packets_csum; 1682 } 1683 #endif 1684 } 1685 1686 static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) 1687 { 1688 if (likely(dev->rx_sg_skb != NULL)) { 1689 int len = dev->rx_desc[slot].data_len; 1690 int tot_len = dev->rx_sg_skb->len + len; 1691 1692 if (unlikely(tot_len + 2 > dev->rx_skb_size)) { 1693 ++dev->estats.rx_dropped_mtu; 1694 dev_kfree_skb(dev->rx_sg_skb); 1695 dev->rx_sg_skb = NULL; 1696 } else { 1697 memcpy(skb_tail_pointer(dev->rx_sg_skb), 1698 dev->rx_skb[slot]->data, len); 1699 skb_put(dev->rx_sg_skb, len); 1700 emac_recycle_rx_skb(dev, slot, len); 1701 return 0; 1702 } 1703 } 1704 emac_recycle_rx_skb(dev, slot, 0); 1705 return -1; 1706 } 1707 1708 /* NAPI poll context */ 1709 static int emac_poll_rx(void *param, int budget) 1710 { 1711 struct emac_instance *dev = param; 1712 int slot = dev->rx_slot, received = 0; 1713 1714 DBG2(dev, "poll_rx(%d)" NL, budget); 1715 1716 again: 1717 while (budget > 0) { 1718 int len; 1719 struct sk_buff *skb; 1720 u16 ctrl = dev->rx_desc[slot].ctrl; 1721 1722 if (ctrl & MAL_RX_CTRL_EMPTY) 1723 break; 1724 1725 skb = dev->rx_skb[slot]; 1726 mb(); 1727 len = dev->rx_desc[slot].data_len; 1728 1729 if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) 1730 goto sg; 1731 1732 ctrl &= EMAC_BAD_RX_MASK; 1733 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { 1734 emac_parse_rx_error(dev, ctrl); 1735 ++dev->estats.rx_dropped_error; 1736 emac_recycle_rx_skb(dev, slot, 0); 1737 len = 0; 1738 goto next; 1739 } 1740 1741 if (len < ETH_HLEN) { 1742 ++dev->estats.rx_dropped_stack; 1743 emac_recycle_rx_skb(dev, slot, len); 1744 goto next; 1745 } 1746 1747 if (len && len < EMAC_RX_COPY_THRESH) { 1748 struct sk_buff *copy_skb = 1749 alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); 1750 if (unlikely(!copy_skb)) 1751 goto oom; 1752 1753 skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); 1754 memcpy(copy_skb->data - 2, skb->data - 2, len + 2); 1755 emac_recycle_rx_skb(dev, slot, len); 1756 skb = copy_skb; 1757 } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) 1758 goto oom; 1759 1760 skb_put(skb, len); 1761 push_packet: 1762 skb->protocol = eth_type_trans(skb, dev->ndev); 1763 emac_rx_csum(dev, skb, ctrl); 1764 1765 if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) 1766 ++dev->estats.rx_dropped_stack; 1767 next: 1768 ++dev->stats.rx_packets; 1769 skip: 1770 dev->stats.rx_bytes += len; 1771 slot = (slot + 1) % NUM_RX_BUFF; 1772 --budget; 1773 ++received; 1774 continue; 1775 sg: 1776 if (ctrl & MAL_RX_CTRL_FIRST) { 1777 BUG_ON(dev->rx_sg_skb); 1778 if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { 1779 DBG(dev, "rx OOM %d" NL, slot); 1780 ++dev->estats.rx_dropped_oom; 1781 emac_recycle_rx_skb(dev, slot, 0); 1782 } else { 1783 dev->rx_sg_skb = skb; 1784 skb_put(skb, len); 1785 } 1786 } else if (!emac_rx_sg_append(dev, slot) && 1787 (ctrl & MAL_RX_CTRL_LAST)) { 1788 1789 skb = dev->rx_sg_skb; 1790 dev->rx_sg_skb = NULL; 1791 1792 ctrl &= EMAC_BAD_RX_MASK; 1793 if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { 1794 emac_parse_rx_error(dev, ctrl); 1795 ++dev->estats.rx_dropped_error; 1796 dev_kfree_skb(skb); 1797 len = 0; 1798 } else 1799 goto push_packet; 1800 } 1801 goto skip; 1802 oom: 1803 DBG(dev, "rx OOM %d" NL, slot); 1804 /* Drop the packet and recycle skb */ 1805 ++dev->estats.rx_dropped_oom; 1806 emac_recycle_rx_skb(dev, slot, 0); 1807 goto next; 1808 } 1809 1810 if (received) { 1811 DBG2(dev, "rx %d BDs" NL, received); 1812 dev->rx_slot = slot; 1813 } 1814 1815 if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) { 1816 mb(); 1817 if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { 1818 DBG2(dev, "rx restart" NL); 1819 received = 0; 1820 goto again; 1821 } 1822 1823 if (dev->rx_sg_skb) { 1824 DBG2(dev, "dropping partial rx packet" NL); 1825 ++dev->estats.rx_dropped_error; 1826 dev_kfree_skb(dev->rx_sg_skb); 1827 dev->rx_sg_skb = NULL; 1828 } 1829 1830 clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); 1831 mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); 1832 emac_rx_enable(dev); 1833 dev->rx_slot = 0; 1834 } 1835 return received; 1836 } 1837 1838 /* NAPI poll context */ 1839 static int emac_peek_rx(void *param) 1840 { 1841 struct emac_instance *dev = param; 1842 1843 return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); 1844 } 1845 1846 /* NAPI poll context */ 1847 static int emac_peek_rx_sg(void *param) 1848 { 1849 struct emac_instance *dev = param; 1850 1851 int slot = dev->rx_slot; 1852 while (1) { 1853 u16 ctrl = dev->rx_desc[slot].ctrl; 1854 if (ctrl & MAL_RX_CTRL_EMPTY) 1855 return 0; 1856 else if (ctrl & MAL_RX_CTRL_LAST) 1857 return 1; 1858 1859 slot = (slot + 1) % NUM_RX_BUFF; 1860 1861 /* I'm just being paranoid here :) */ 1862 if (unlikely(slot == dev->rx_slot)) 1863 return 0; 1864 } 1865 } 1866 1867 /* Hard IRQ */ 1868 static void emac_rxde(void *param) 1869 { 1870 struct emac_instance *dev = param; 1871 1872 ++dev->estats.rx_stopped; 1873 emac_rx_disable_async(dev); 1874 } 1875 1876 /* Hard IRQ */ 1877 static irqreturn_t emac_irq(int irq, void *dev_instance) 1878 { 1879 struct emac_instance *dev = dev_instance; 1880 struct emac_regs __iomem *p = dev->emacp; 1881 struct emac_error_stats *st = &dev->estats; 1882 u32 isr; 1883 1884 spin_lock(&dev->lock); 1885 1886 isr = in_be32(&p->isr); 1887 out_be32(&p->isr, isr); 1888 1889 DBG(dev, "isr = %08x" NL, isr); 1890 1891 if (isr & EMAC4_ISR_TXPE) 1892 ++st->tx_parity; 1893 if (isr & EMAC4_ISR_RXPE) 1894 ++st->rx_parity; 1895 if (isr & EMAC4_ISR_TXUE) 1896 ++st->tx_underrun; 1897 if (isr & EMAC4_ISR_RXOE) 1898 ++st->rx_fifo_overrun; 1899 if (isr & EMAC_ISR_OVR) 1900 ++st->rx_overrun; 1901 if (isr & EMAC_ISR_BP) 1902 ++st->rx_bad_packet; 1903 if (isr & EMAC_ISR_RP) 1904 ++st->rx_runt_packet; 1905 if (isr & EMAC_ISR_SE) 1906 ++st->rx_short_event; 1907 if (isr & EMAC_ISR_ALE) 1908 ++st->rx_alignment_error; 1909 if (isr & EMAC_ISR_BFCS) 1910 ++st->rx_bad_fcs; 1911 if (isr & EMAC_ISR_PTLE) 1912 ++st->rx_packet_too_long; 1913 if (isr & EMAC_ISR_ORE) 1914 ++st->rx_out_of_range; 1915 if (isr & EMAC_ISR_IRE) 1916 ++st->rx_in_range; 1917 if (isr & EMAC_ISR_SQE) 1918 ++st->tx_sqe; 1919 if (isr & EMAC_ISR_TE) 1920 ++st->tx_errors; 1921 1922 spin_unlock(&dev->lock); 1923 1924 return IRQ_HANDLED; 1925 } 1926 1927 static struct net_device_stats *emac_stats(struct net_device *ndev) 1928 { 1929 struct emac_instance *dev = netdev_priv(ndev); 1930 struct emac_stats *st = &dev->stats; 1931 struct emac_error_stats *est = &dev->estats; 1932 struct net_device_stats *nst = &dev->nstats; 1933 unsigned long flags; 1934 1935 DBG2(dev, "stats" NL); 1936 1937 /* Compute "legacy" statistics */ 1938 spin_lock_irqsave(&dev->lock, flags); 1939 nst->rx_packets = (unsigned long)st->rx_packets; 1940 nst->rx_bytes = (unsigned long)st->rx_bytes; 1941 nst->tx_packets = (unsigned long)st->tx_packets; 1942 nst->tx_bytes = (unsigned long)st->tx_bytes; 1943 nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + 1944 est->rx_dropped_error + 1945 est->rx_dropped_resize + 1946 est->rx_dropped_mtu); 1947 nst->tx_dropped = (unsigned long)est->tx_dropped; 1948 1949 nst->rx_errors = (unsigned long)est->rx_bd_errors; 1950 nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + 1951 est->rx_fifo_overrun + 1952 est->rx_overrun); 1953 nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + 1954 est->rx_alignment_error); 1955 nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + 1956 est->rx_bad_fcs); 1957 nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + 1958 est->rx_bd_short_event + 1959 est->rx_bd_packet_too_long + 1960 est->rx_bd_out_of_range + 1961 est->rx_bd_in_range + 1962 est->rx_runt_packet + 1963 est->rx_short_event + 1964 est->rx_packet_too_long + 1965 est->rx_out_of_range + 1966 est->rx_in_range); 1967 1968 nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); 1969 nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + 1970 est->tx_underrun); 1971 nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; 1972 nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + 1973 est->tx_bd_excessive_collisions + 1974 est->tx_bd_late_collision + 1975 est->tx_bd_multple_collisions); 1976 spin_unlock_irqrestore(&dev->lock, flags); 1977 return nst; 1978 } 1979 1980 static struct mal_commac_ops emac_commac_ops = { 1981 .poll_tx = &emac_poll_tx, 1982 .poll_rx = &emac_poll_rx, 1983 .peek_rx = &emac_peek_rx, 1984 .rxde = &emac_rxde, 1985 }; 1986 1987 static struct mal_commac_ops emac_commac_sg_ops = { 1988 .poll_tx = &emac_poll_tx, 1989 .poll_rx = &emac_poll_rx, 1990 .peek_rx = &emac_peek_rx_sg, 1991 .rxde = &emac_rxde, 1992 }; 1993 1994 /* Ethtool support */ 1995 static int emac_ethtool_get_link_ksettings(struct net_device *ndev, 1996 struct ethtool_link_ksettings *cmd) 1997 { 1998 struct emac_instance *dev = netdev_priv(ndev); 1999 u32 supported, advertising; 2000 2001 supported = dev->phy.features; 2002 cmd->base.port = PORT_MII; 2003 cmd->base.phy_address = dev->phy.address; 2004 2005 mutex_lock(&dev->link_lock); 2006 advertising = dev->phy.advertising; 2007 cmd->base.autoneg = dev->phy.autoneg; 2008 cmd->base.speed = dev->phy.speed; 2009 cmd->base.duplex = dev->phy.duplex; 2010 mutex_unlock(&dev->link_lock); 2011 2012 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2013 supported); 2014 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2015 advertising); 2016 2017 return 0; 2018 } 2019 2020 static int 2021 emac_ethtool_set_link_ksettings(struct net_device *ndev, 2022 const struct ethtool_link_ksettings *cmd) 2023 { 2024 struct emac_instance *dev = netdev_priv(ndev); 2025 u32 f = dev->phy.features; 2026 u32 advertising; 2027 2028 ethtool_convert_link_mode_to_legacy_u32(&advertising, 2029 cmd->link_modes.advertising); 2030 2031 DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL, 2032 cmd->base.autoneg, cmd->base.speed, cmd->base.duplex, advertising); 2033 2034 /* Basic sanity checks */ 2035 if (dev->phy.address < 0) 2036 return -EOPNOTSUPP; 2037 if (cmd->base.autoneg != AUTONEG_ENABLE && 2038 cmd->base.autoneg != AUTONEG_DISABLE) 2039 return -EINVAL; 2040 if (cmd->base.autoneg == AUTONEG_ENABLE && advertising == 0) 2041 return -EINVAL; 2042 if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL) 2043 return -EINVAL; 2044 2045 if (cmd->base.autoneg == AUTONEG_DISABLE) { 2046 switch (cmd->base.speed) { 2047 case SPEED_10: 2048 if (cmd->base.duplex == DUPLEX_HALF && 2049 !(f & SUPPORTED_10baseT_Half)) 2050 return -EINVAL; 2051 if (cmd->base.duplex == DUPLEX_FULL && 2052 !(f & SUPPORTED_10baseT_Full)) 2053 return -EINVAL; 2054 break; 2055 case SPEED_100: 2056 if (cmd->base.duplex == DUPLEX_HALF && 2057 !(f & SUPPORTED_100baseT_Half)) 2058 return -EINVAL; 2059 if (cmd->base.duplex == DUPLEX_FULL && 2060 !(f & SUPPORTED_100baseT_Full)) 2061 return -EINVAL; 2062 break; 2063 case SPEED_1000: 2064 if (cmd->base.duplex == DUPLEX_HALF && 2065 !(f & SUPPORTED_1000baseT_Half)) 2066 return -EINVAL; 2067 if (cmd->base.duplex == DUPLEX_FULL && 2068 !(f & SUPPORTED_1000baseT_Full)) 2069 return -EINVAL; 2070 break; 2071 default: 2072 return -EINVAL; 2073 } 2074 2075 mutex_lock(&dev->link_lock); 2076 dev->phy.def->ops->setup_forced(&dev->phy, cmd->base.speed, 2077 cmd->base.duplex); 2078 mutex_unlock(&dev->link_lock); 2079 2080 } else { 2081 if (!(f & SUPPORTED_Autoneg)) 2082 return -EINVAL; 2083 2084 mutex_lock(&dev->link_lock); 2085 dev->phy.def->ops->setup_aneg(&dev->phy, 2086 (advertising & f) | 2087 (dev->phy.advertising & 2088 (ADVERTISED_Pause | 2089 ADVERTISED_Asym_Pause))); 2090 mutex_unlock(&dev->link_lock); 2091 } 2092 emac_force_link_update(dev); 2093 2094 return 0; 2095 } 2096 2097 static void emac_ethtool_get_ringparam(struct net_device *ndev, 2098 struct ethtool_ringparam *rp) 2099 { 2100 rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; 2101 rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; 2102 } 2103 2104 static void emac_ethtool_get_pauseparam(struct net_device *ndev, 2105 struct ethtool_pauseparam *pp) 2106 { 2107 struct emac_instance *dev = netdev_priv(ndev); 2108 2109 mutex_lock(&dev->link_lock); 2110 if ((dev->phy.features & SUPPORTED_Autoneg) && 2111 (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) 2112 pp->autoneg = 1; 2113 2114 if (dev->phy.duplex == DUPLEX_FULL) { 2115 if (dev->phy.pause) 2116 pp->rx_pause = pp->tx_pause = 1; 2117 else if (dev->phy.asym_pause) 2118 pp->tx_pause = 1; 2119 } 2120 mutex_unlock(&dev->link_lock); 2121 } 2122 2123 static int emac_get_regs_len(struct emac_instance *dev) 2124 { 2125 return sizeof(struct emac_ethtool_regs_subhdr) + 2126 sizeof(struct emac_regs); 2127 } 2128 2129 static int emac_ethtool_get_regs_len(struct net_device *ndev) 2130 { 2131 struct emac_instance *dev = netdev_priv(ndev); 2132 int size; 2133 2134 size = sizeof(struct emac_ethtool_regs_hdr) + 2135 emac_get_regs_len(dev) + mal_get_regs_len(dev->mal); 2136 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 2137 size += zmii_get_regs_len(dev->zmii_dev); 2138 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 2139 size += rgmii_get_regs_len(dev->rgmii_dev); 2140 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 2141 size += tah_get_regs_len(dev->tah_dev); 2142 2143 return size; 2144 } 2145 2146 static void *emac_dump_regs(struct emac_instance *dev, void *buf) 2147 { 2148 struct emac_ethtool_regs_subhdr *hdr = buf; 2149 2150 hdr->index = dev->cell_index; 2151 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { 2152 hdr->version = EMAC4SYNC_ETHTOOL_REGS_VER; 2153 } else if (emac_has_feature(dev, EMAC_FTR_EMAC4)) { 2154 hdr->version = EMAC4_ETHTOOL_REGS_VER; 2155 } else { 2156 hdr->version = EMAC_ETHTOOL_REGS_VER; 2157 } 2158 memcpy_fromio(hdr + 1, dev->emacp, sizeof(struct emac_regs)); 2159 return (void *)(hdr + 1) + sizeof(struct emac_regs); 2160 } 2161 2162 static void emac_ethtool_get_regs(struct net_device *ndev, 2163 struct ethtool_regs *regs, void *buf) 2164 { 2165 struct emac_instance *dev = netdev_priv(ndev); 2166 struct emac_ethtool_regs_hdr *hdr = buf; 2167 2168 hdr->components = 0; 2169 buf = hdr + 1; 2170 2171 buf = mal_dump_regs(dev->mal, buf); 2172 buf = emac_dump_regs(dev, buf); 2173 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) { 2174 hdr->components |= EMAC_ETHTOOL_REGS_ZMII; 2175 buf = zmii_dump_regs(dev->zmii_dev, buf); 2176 } 2177 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { 2178 hdr->components |= EMAC_ETHTOOL_REGS_RGMII; 2179 buf = rgmii_dump_regs(dev->rgmii_dev, buf); 2180 } 2181 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) { 2182 hdr->components |= EMAC_ETHTOOL_REGS_TAH; 2183 buf = tah_dump_regs(dev->tah_dev, buf); 2184 } 2185 } 2186 2187 static int emac_ethtool_nway_reset(struct net_device *ndev) 2188 { 2189 struct emac_instance *dev = netdev_priv(ndev); 2190 int res = 0; 2191 2192 DBG(dev, "nway_reset" NL); 2193 2194 if (dev->phy.address < 0) 2195 return -EOPNOTSUPP; 2196 2197 mutex_lock(&dev->link_lock); 2198 if (!dev->phy.autoneg) { 2199 res = -EINVAL; 2200 goto out; 2201 } 2202 2203 dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); 2204 out: 2205 mutex_unlock(&dev->link_lock); 2206 emac_force_link_update(dev); 2207 return res; 2208 } 2209 2210 static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset) 2211 { 2212 if (stringset == ETH_SS_STATS) 2213 return EMAC_ETHTOOL_STATS_COUNT; 2214 else 2215 return -EINVAL; 2216 } 2217 2218 static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, 2219 u8 * buf) 2220 { 2221 if (stringset == ETH_SS_STATS) 2222 memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); 2223 } 2224 2225 static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, 2226 struct ethtool_stats *estats, 2227 u64 * tmp_stats) 2228 { 2229 struct emac_instance *dev = netdev_priv(ndev); 2230 2231 memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); 2232 tmp_stats += sizeof(dev->stats) / sizeof(u64); 2233 memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); 2234 } 2235 2236 static void emac_ethtool_get_drvinfo(struct net_device *ndev, 2237 struct ethtool_drvinfo *info) 2238 { 2239 struct emac_instance *dev = netdev_priv(ndev); 2240 2241 strlcpy(info->driver, "ibm_emac", sizeof(info->driver)); 2242 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 2243 snprintf(info->bus_info, sizeof(info->bus_info), "PPC 4xx EMAC-%d %s", 2244 dev->cell_index, dev->ofdev->dev.of_node->full_name); 2245 } 2246 2247 static const struct ethtool_ops emac_ethtool_ops = { 2248 .get_drvinfo = emac_ethtool_get_drvinfo, 2249 2250 .get_regs_len = emac_ethtool_get_regs_len, 2251 .get_regs = emac_ethtool_get_regs, 2252 2253 .nway_reset = emac_ethtool_nway_reset, 2254 2255 .get_ringparam = emac_ethtool_get_ringparam, 2256 .get_pauseparam = emac_ethtool_get_pauseparam, 2257 2258 .get_strings = emac_ethtool_get_strings, 2259 .get_sset_count = emac_ethtool_get_sset_count, 2260 .get_ethtool_stats = emac_ethtool_get_ethtool_stats, 2261 2262 .get_link = ethtool_op_get_link, 2263 .get_link_ksettings = emac_ethtool_get_link_ksettings, 2264 .set_link_ksettings = emac_ethtool_set_link_ksettings, 2265 }; 2266 2267 static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) 2268 { 2269 struct emac_instance *dev = netdev_priv(ndev); 2270 struct mii_ioctl_data *data = if_mii(rq); 2271 2272 DBG(dev, "ioctl %08x" NL, cmd); 2273 2274 if (dev->phy.address < 0) 2275 return -EOPNOTSUPP; 2276 2277 switch (cmd) { 2278 case SIOCGMIIPHY: 2279 data->phy_id = dev->phy.address; 2280 /* Fall through */ 2281 case SIOCGMIIREG: 2282 data->val_out = emac_mdio_read(ndev, dev->phy.address, 2283 data->reg_num); 2284 return 0; 2285 2286 case SIOCSMIIREG: 2287 emac_mdio_write(ndev, dev->phy.address, data->reg_num, 2288 data->val_in); 2289 return 0; 2290 default: 2291 return -EOPNOTSUPP; 2292 } 2293 } 2294 2295 struct emac_depentry { 2296 u32 phandle; 2297 struct device_node *node; 2298 struct platform_device *ofdev; 2299 void *drvdata; 2300 }; 2301 2302 #define EMAC_DEP_MAL_IDX 0 2303 #define EMAC_DEP_ZMII_IDX 1 2304 #define EMAC_DEP_RGMII_IDX 2 2305 #define EMAC_DEP_TAH_IDX 3 2306 #define EMAC_DEP_MDIO_IDX 4 2307 #define EMAC_DEP_PREV_IDX 5 2308 #define EMAC_DEP_COUNT 6 2309 2310 static int emac_check_deps(struct emac_instance *dev, 2311 struct emac_depentry *deps) 2312 { 2313 int i, there = 0; 2314 struct device_node *np; 2315 2316 for (i = 0; i < EMAC_DEP_COUNT; i++) { 2317 /* no dependency on that item, allright */ 2318 if (deps[i].phandle == 0) { 2319 there++; 2320 continue; 2321 } 2322 /* special case for blist as the dependency might go away */ 2323 if (i == EMAC_DEP_PREV_IDX) { 2324 np = *(dev->blist - 1); 2325 if (np == NULL) { 2326 deps[i].phandle = 0; 2327 there++; 2328 continue; 2329 } 2330 if (deps[i].node == NULL) 2331 deps[i].node = of_node_get(np); 2332 } 2333 if (deps[i].node == NULL) 2334 deps[i].node = of_find_node_by_phandle(deps[i].phandle); 2335 if (deps[i].node == NULL) 2336 continue; 2337 if (deps[i].ofdev == NULL) 2338 deps[i].ofdev = of_find_device_by_node(deps[i].node); 2339 if (deps[i].ofdev == NULL) 2340 continue; 2341 if (deps[i].drvdata == NULL) 2342 deps[i].drvdata = platform_get_drvdata(deps[i].ofdev); 2343 if (deps[i].drvdata != NULL) 2344 there++; 2345 } 2346 return there == EMAC_DEP_COUNT; 2347 } 2348 2349 static void emac_put_deps(struct emac_instance *dev) 2350 { 2351 of_dev_put(dev->mal_dev); 2352 of_dev_put(dev->zmii_dev); 2353 of_dev_put(dev->rgmii_dev); 2354 of_dev_put(dev->mdio_dev); 2355 of_dev_put(dev->tah_dev); 2356 } 2357 2358 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action, 2359 void *data) 2360 { 2361 /* We are only intereted in device addition */ 2362 if (action == BUS_NOTIFY_BOUND_DRIVER) 2363 wake_up_all(&emac_probe_wait); 2364 return 0; 2365 } 2366 2367 static struct notifier_block emac_of_bus_notifier = { 2368 .notifier_call = emac_of_bus_notify 2369 }; 2370 2371 static int emac_wait_deps(struct emac_instance *dev) 2372 { 2373 struct emac_depentry deps[EMAC_DEP_COUNT]; 2374 int i, err; 2375 2376 memset(&deps, 0, sizeof(deps)); 2377 2378 deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph; 2379 deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph; 2380 deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph; 2381 if (dev->tah_ph) 2382 deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph; 2383 if (dev->mdio_ph) 2384 deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph; 2385 if (dev->blist && dev->blist > emac_boot_list) 2386 deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu; 2387 bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier); 2388 wait_event_timeout(emac_probe_wait, 2389 emac_check_deps(dev, deps), 2390 EMAC_PROBE_DEP_TIMEOUT); 2391 bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier); 2392 err = emac_check_deps(dev, deps) ? 0 : -ENODEV; 2393 for (i = 0; i < EMAC_DEP_COUNT; i++) { 2394 of_node_put(deps[i].node); 2395 if (err) 2396 of_dev_put(deps[i].ofdev); 2397 } 2398 if (err == 0) { 2399 dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; 2400 dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev; 2401 dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev; 2402 dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; 2403 dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; 2404 } 2405 of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); 2406 return err; 2407 } 2408 2409 static int emac_read_uint_prop(struct device_node *np, const char *name, 2410 u32 *val, int fatal) 2411 { 2412 int len; 2413 const u32 *prop = of_get_property(np, name, &len); 2414 if (prop == NULL || len < sizeof(u32)) { 2415 if (fatal) 2416 printk(KERN_ERR "%s: missing %s property\n", 2417 np->full_name, name); 2418 return -ENODEV; 2419 } 2420 *val = *prop; 2421 return 0; 2422 } 2423 2424 static void emac_adjust_link(struct net_device *ndev) 2425 { 2426 struct emac_instance *dev = netdev_priv(ndev); 2427 struct phy_device *phy = dev->phy_dev; 2428 2429 dev->phy.autoneg = phy->autoneg; 2430 dev->phy.speed = phy->speed; 2431 dev->phy.duplex = phy->duplex; 2432 dev->phy.pause = phy->pause; 2433 dev->phy.asym_pause = phy->asym_pause; 2434 dev->phy.advertising = phy->advertising; 2435 } 2436 2437 static int emac_mii_bus_read(struct mii_bus *bus, int addr, int regnum) 2438 { 2439 int ret = emac_mdio_read(bus->priv, addr, regnum); 2440 /* This is a workaround for powered down ports/phys. 2441 * In the wild, this was seen on the Cisco Meraki MX60(W). 2442 * This hardware disables ports as part of the handoff 2443 * procedure. Accessing the ports will lead to errors 2444 * (-ETIMEDOUT, -EREMOTEIO) that do more harm than good. 2445 */ 2446 return ret < 0 ? 0xffff : ret; 2447 } 2448 2449 static int emac_mii_bus_write(struct mii_bus *bus, int addr, 2450 int regnum, u16 val) 2451 { 2452 emac_mdio_write(bus->priv, addr, regnum, val); 2453 return 0; 2454 } 2455 2456 static int emac_mii_bus_reset(struct mii_bus *bus) 2457 { 2458 struct emac_instance *dev = netdev_priv(bus->priv); 2459 2460 return emac_reset(dev); 2461 } 2462 2463 static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise) 2464 { 2465 struct net_device *ndev = phy->dev; 2466 struct emac_instance *dev = netdev_priv(ndev); 2467 2468 dev->phy.autoneg = AUTONEG_ENABLE; 2469 dev->phy.speed = SPEED_1000; 2470 dev->phy.duplex = DUPLEX_FULL; 2471 dev->phy.advertising = advertise; 2472 phy->autoneg = AUTONEG_ENABLE; 2473 phy->speed = dev->phy.speed; 2474 phy->duplex = dev->phy.duplex; 2475 phy->advertising = advertise; 2476 return phy_start_aneg(dev->phy_dev); 2477 } 2478 2479 static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd) 2480 { 2481 struct net_device *ndev = phy->dev; 2482 struct emac_instance *dev = netdev_priv(ndev); 2483 2484 dev->phy.autoneg = AUTONEG_DISABLE; 2485 dev->phy.speed = speed; 2486 dev->phy.duplex = fd; 2487 phy->autoneg = AUTONEG_DISABLE; 2488 phy->speed = speed; 2489 phy->duplex = fd; 2490 return phy_start_aneg(dev->phy_dev); 2491 } 2492 2493 static int emac_mdio_poll_link(struct mii_phy *phy) 2494 { 2495 struct net_device *ndev = phy->dev; 2496 struct emac_instance *dev = netdev_priv(ndev); 2497 int res; 2498 2499 res = phy_read_status(dev->phy_dev); 2500 if (res) { 2501 dev_err(&dev->ofdev->dev, "link update failed (%d).", res); 2502 return ethtool_op_get_link(ndev); 2503 } 2504 2505 return dev->phy_dev->link; 2506 } 2507 2508 static int emac_mdio_read_link(struct mii_phy *phy) 2509 { 2510 struct net_device *ndev = phy->dev; 2511 struct emac_instance *dev = netdev_priv(ndev); 2512 int res; 2513 2514 res = phy_read_status(dev->phy_dev); 2515 if (res) 2516 return res; 2517 2518 dev->phy.speed = phy->speed; 2519 dev->phy.duplex = phy->duplex; 2520 dev->phy.pause = phy->pause; 2521 dev->phy.asym_pause = phy->asym_pause; 2522 return 0; 2523 } 2524 2525 static int emac_mdio_init_phy(struct mii_phy *phy) 2526 { 2527 struct net_device *ndev = phy->dev; 2528 struct emac_instance *dev = netdev_priv(ndev); 2529 2530 phy_start(dev->phy_dev); 2531 dev->phy.autoneg = phy->autoneg; 2532 dev->phy.speed = phy->speed; 2533 dev->phy.duplex = phy->duplex; 2534 dev->phy.advertising = phy->advertising; 2535 dev->phy.pause = phy->pause; 2536 dev->phy.asym_pause = phy->asym_pause; 2537 2538 return phy_init_hw(dev->phy_dev); 2539 } 2540 2541 static const struct mii_phy_ops emac_dt_mdio_phy_ops = { 2542 .init = emac_mdio_init_phy, 2543 .setup_aneg = emac_mdio_setup_aneg, 2544 .setup_forced = emac_mdio_setup_forced, 2545 .poll_link = emac_mdio_poll_link, 2546 .read_link = emac_mdio_read_link, 2547 }; 2548 2549 static int emac_dt_mdio_probe(struct emac_instance *dev) 2550 { 2551 struct device_node *mii_np; 2552 int res; 2553 2554 mii_np = of_get_child_by_name(dev->ofdev->dev.of_node, "mdio"); 2555 if (!mii_np) { 2556 dev_err(&dev->ofdev->dev, "no mdio definition found."); 2557 return -ENODEV; 2558 } 2559 2560 if (!of_device_is_available(mii_np)) { 2561 res = -ENODEV; 2562 goto put_node; 2563 } 2564 2565 dev->mii_bus = devm_mdiobus_alloc(&dev->ofdev->dev); 2566 if (!dev->mii_bus) { 2567 res = -ENOMEM; 2568 goto put_node; 2569 } 2570 2571 dev->mii_bus->priv = dev->ndev; 2572 dev->mii_bus->parent = dev->ndev->dev.parent; 2573 dev->mii_bus->name = "emac_mdio"; 2574 dev->mii_bus->read = &emac_mii_bus_read; 2575 dev->mii_bus->write = &emac_mii_bus_write; 2576 dev->mii_bus->reset = &emac_mii_bus_reset; 2577 snprintf(dev->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev->ofdev->name); 2578 res = of_mdiobus_register(dev->mii_bus, mii_np); 2579 if (res) { 2580 dev_err(&dev->ofdev->dev, "cannot register MDIO bus %s (%d)", 2581 dev->mii_bus->name, res); 2582 } 2583 2584 put_node: 2585 of_node_put(mii_np); 2586 return res; 2587 } 2588 2589 static int emac_dt_phy_connect(struct emac_instance *dev, 2590 struct device_node *phy_handle) 2591 { 2592 dev->phy.def = devm_kzalloc(&dev->ofdev->dev, sizeof(*dev->phy.def), 2593 GFP_KERNEL); 2594 if (!dev->phy.def) 2595 return -ENOMEM; 2596 2597 dev->phy_dev = of_phy_connect(dev->ndev, phy_handle, &emac_adjust_link, 2598 0, dev->phy_mode); 2599 if (!dev->phy_dev) { 2600 dev_err(&dev->ofdev->dev, "failed to connect to PHY.\n"); 2601 return -ENODEV; 2602 } 2603 2604 dev->phy.def->phy_id = dev->phy_dev->drv->phy_id; 2605 dev->phy.def->phy_id_mask = dev->phy_dev->drv->phy_id_mask; 2606 dev->phy.def->name = dev->phy_dev->drv->name; 2607 dev->phy.def->ops = &emac_dt_mdio_phy_ops; 2608 dev->phy.features = dev->phy_dev->supported; 2609 dev->phy.address = dev->phy_dev->mdio.addr; 2610 dev->phy.mode = dev->phy_dev->interface; 2611 return 0; 2612 } 2613 2614 static int emac_dt_phy_probe(struct emac_instance *dev) 2615 { 2616 struct device_node *np = dev->ofdev->dev.of_node; 2617 struct device_node *phy_handle; 2618 int res = 1; 2619 2620 phy_handle = of_parse_phandle(np, "phy-handle", 0); 2621 2622 if (phy_handle) { 2623 res = emac_dt_mdio_probe(dev); 2624 if (!res) { 2625 res = emac_dt_phy_connect(dev, phy_handle); 2626 if (res) 2627 mdiobus_unregister(dev->mii_bus); 2628 } 2629 } 2630 2631 of_node_put(phy_handle); 2632 return res; 2633 } 2634 2635 static int emac_init_phy(struct emac_instance *dev) 2636 { 2637 struct device_node *np = dev->ofdev->dev.of_node; 2638 struct net_device *ndev = dev->ndev; 2639 u32 phy_map, adv; 2640 int i; 2641 2642 dev->phy.dev = ndev; 2643 dev->phy.mode = dev->phy_mode; 2644 2645 /* PHY-less configuration. */ 2646 if ((dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) || 2647 of_phy_is_fixed_link(np)) { 2648 emac_reset(dev); 2649 2650 /* PHY-less configuration. */ 2651 dev->phy.address = -1; 2652 dev->phy.features = SUPPORTED_MII; 2653 if (emac_phy_supports_gige(dev->phy_mode)) 2654 dev->phy.features |= SUPPORTED_1000baseT_Full; 2655 else 2656 dev->phy.features |= SUPPORTED_100baseT_Full; 2657 dev->phy.pause = 1; 2658 2659 if (of_phy_is_fixed_link(np)) { 2660 int res = emac_dt_mdio_probe(dev); 2661 2662 if (!res) { 2663 res = of_phy_register_fixed_link(np); 2664 if (res) 2665 mdiobus_unregister(dev->mii_bus); 2666 } 2667 return res; 2668 } 2669 return 0; 2670 } 2671 2672 mutex_lock(&emac_phy_map_lock); 2673 phy_map = dev->phy_map | busy_phy_map; 2674 2675 DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map); 2676 2677 dev->phy.mdio_read = emac_mdio_read; 2678 dev->phy.mdio_write = emac_mdio_write; 2679 2680 /* Enable internal clock source */ 2681 #ifdef CONFIG_PPC_DCR_NATIVE 2682 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2683 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); 2684 #endif 2685 /* PHY clock workaround */ 2686 emac_rx_clk_tx(dev); 2687 2688 /* Enable internal clock source on 440GX*/ 2689 #ifdef CONFIG_PPC_DCR_NATIVE 2690 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2691 dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); 2692 #endif 2693 /* Configure EMAC with defaults so we can at least use MDIO 2694 * This is needed mostly for 440GX 2695 */ 2696 if (emac_phy_gpcs(dev->phy.mode)) { 2697 /* XXX 2698 * Make GPCS PHY address equal to EMAC index. 2699 * We probably should take into account busy_phy_map 2700 * and/or phy_map here. 2701 * 2702 * Note that the busy_phy_map is currently global 2703 * while it should probably be per-ASIC... 2704 */ 2705 dev->phy.gpcs_address = dev->gpcs_address; 2706 if (dev->phy.gpcs_address == 0xffffffff) 2707 dev->phy.address = dev->cell_index; 2708 } 2709 2710 emac_configure(dev); 2711 2712 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { 2713 int res = emac_dt_phy_probe(dev); 2714 2715 switch (res) { 2716 case 1: 2717 /* No phy-handle property configured. 2718 * Continue with the existing phy probe 2719 * and setup code. 2720 */ 2721 break; 2722 2723 case 0: 2724 mutex_unlock(&emac_phy_map_lock); 2725 goto init_phy; 2726 2727 default: 2728 mutex_unlock(&emac_phy_map_lock); 2729 dev_err(&dev->ofdev->dev, "failed to attach dt phy (%d).\n", 2730 res); 2731 return res; 2732 } 2733 } 2734 2735 if (dev->phy_address != 0xffffffff) 2736 phy_map = ~(1 << dev->phy_address); 2737 2738 for (i = 0; i < 0x20; phy_map >>= 1, ++i) 2739 if (!(phy_map & 1)) { 2740 int r; 2741 busy_phy_map |= 1 << i; 2742 2743 /* Quick check if there is a PHY at the address */ 2744 r = emac_mdio_read(dev->ndev, i, MII_BMCR); 2745 if (r == 0xffff || r < 0) 2746 continue; 2747 if (!emac_mii_phy_probe(&dev->phy, i)) 2748 break; 2749 } 2750 2751 /* Enable external clock source */ 2752 #ifdef CONFIG_PPC_DCR_NATIVE 2753 if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) 2754 dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0); 2755 #endif 2756 mutex_unlock(&emac_phy_map_lock); 2757 if (i == 0x20) { 2758 printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name); 2759 return -ENXIO; 2760 } 2761 2762 init_phy: 2763 /* Init PHY */ 2764 if (dev->phy.def->ops->init) 2765 dev->phy.def->ops->init(&dev->phy); 2766 2767 /* Disable any PHY features not supported by the platform */ 2768 dev->phy.def->features &= ~dev->phy_feat_exc; 2769 dev->phy.features &= ~dev->phy_feat_exc; 2770 2771 /* Setup initial link parameters */ 2772 if (dev->phy.features & SUPPORTED_Autoneg) { 2773 adv = dev->phy.features; 2774 if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x)) 2775 adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; 2776 /* Restart autonegotiation */ 2777 dev->phy.def->ops->setup_aneg(&dev->phy, adv); 2778 } else { 2779 u32 f = dev->phy.def->features; 2780 int speed = SPEED_10, fd = DUPLEX_HALF; 2781 2782 /* Select highest supported speed/duplex */ 2783 if (f & SUPPORTED_1000baseT_Full) { 2784 speed = SPEED_1000; 2785 fd = DUPLEX_FULL; 2786 } else if (f & SUPPORTED_1000baseT_Half) 2787 speed = SPEED_1000; 2788 else if (f & SUPPORTED_100baseT_Full) { 2789 speed = SPEED_100; 2790 fd = DUPLEX_FULL; 2791 } else if (f & SUPPORTED_100baseT_Half) 2792 speed = SPEED_100; 2793 else if (f & SUPPORTED_10baseT_Full) 2794 fd = DUPLEX_FULL; 2795 2796 /* Force link parameters */ 2797 dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); 2798 } 2799 return 0; 2800 } 2801 2802 static int emac_init_config(struct emac_instance *dev) 2803 { 2804 struct device_node *np = dev->ofdev->dev.of_node; 2805 const void *p; 2806 2807 /* Read config from device-tree */ 2808 if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1)) 2809 return -ENXIO; 2810 if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1)) 2811 return -ENXIO; 2812 if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1)) 2813 return -ENXIO; 2814 if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1)) 2815 return -ENXIO; 2816 if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0)) 2817 dev->max_mtu = ETH_DATA_LEN; 2818 if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0)) 2819 dev->rx_fifo_size = 2048; 2820 if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0)) 2821 dev->tx_fifo_size = 2048; 2822 if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0)) 2823 dev->rx_fifo_size_gige = dev->rx_fifo_size; 2824 if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0)) 2825 dev->tx_fifo_size_gige = dev->tx_fifo_size; 2826 if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0)) 2827 dev->phy_address = 0xffffffff; 2828 if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0)) 2829 dev->phy_map = 0xffffffff; 2830 if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0)) 2831 dev->gpcs_address = 0xffffffff; 2832 if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1)) 2833 return -ENXIO; 2834 if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0)) 2835 dev->tah_ph = 0; 2836 if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0)) 2837 dev->tah_port = 0; 2838 if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0)) 2839 dev->mdio_ph = 0; 2840 if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0)) 2841 dev->zmii_ph = 0; 2842 if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0)) 2843 dev->zmii_port = 0xffffffff; 2844 if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0)) 2845 dev->rgmii_ph = 0; 2846 if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0)) 2847 dev->rgmii_port = 0xffffffff; 2848 if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0)) 2849 dev->fifo_entry_size = 16; 2850 if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0)) 2851 dev->mal_burst_size = 256; 2852 2853 /* PHY mode needs some decoding */ 2854 dev->phy_mode = of_get_phy_mode(np); 2855 if (dev->phy_mode < 0) 2856 dev->phy_mode = PHY_MODE_NA; 2857 2858 /* Check EMAC version */ 2859 if (of_device_is_compatible(np, "ibm,emac4sync")) { 2860 dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC); 2861 if (of_device_is_compatible(np, "ibm,emac-460ex") || 2862 of_device_is_compatible(np, "ibm,emac-460gt")) 2863 dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX; 2864 if (of_device_is_compatible(np, "ibm,emac-405ex") || 2865 of_device_is_compatible(np, "ibm,emac-405exr")) 2866 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; 2867 if (of_device_is_compatible(np, "ibm,emac-apm821xx")) { 2868 dev->features |= (EMAC_APM821XX_REQ_JUMBO_FRAME_SIZE | 2869 EMAC_FTR_APM821XX_NO_HALF_DUPLEX | 2870 EMAC_FTR_460EX_PHY_CLK_FIX); 2871 } 2872 } else if (of_device_is_compatible(np, "ibm,emac4")) { 2873 dev->features |= EMAC_FTR_EMAC4; 2874 if (of_device_is_compatible(np, "ibm,emac-440gx")) 2875 dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX; 2876 } else { 2877 if (of_device_is_compatible(np, "ibm,emac-440ep") || 2878 of_device_is_compatible(np, "ibm,emac-440gr")) 2879 dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; 2880 if (of_device_is_compatible(np, "ibm,emac-405ez")) { 2881 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL 2882 dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x; 2883 #else 2884 printk(KERN_ERR "%s: Flow control not disabled!\n", 2885 np->full_name); 2886 return -ENXIO; 2887 #endif 2888 } 2889 2890 } 2891 2892 /* Fixup some feature bits based on the device tree */ 2893 if (of_get_property(np, "has-inverted-stacr-oc", NULL)) 2894 dev->features |= EMAC_FTR_STACR_OC_INVERT; 2895 if (of_get_property(np, "has-new-stacr-staopc", NULL)) 2896 dev->features |= EMAC_FTR_HAS_NEW_STACR; 2897 2898 /* CAB lacks the appropriate properties */ 2899 if (of_device_is_compatible(np, "ibm,emac-axon")) 2900 dev->features |= EMAC_FTR_HAS_NEW_STACR | 2901 EMAC_FTR_STACR_OC_INVERT; 2902 2903 /* Enable TAH/ZMII/RGMII features as found */ 2904 if (dev->tah_ph != 0) { 2905 #ifdef CONFIG_IBM_EMAC_TAH 2906 dev->features |= EMAC_FTR_HAS_TAH; 2907 #else 2908 printk(KERN_ERR "%s: TAH support not enabled !\n", 2909 np->full_name); 2910 return -ENXIO; 2911 #endif 2912 } 2913 2914 if (dev->zmii_ph != 0) { 2915 #ifdef CONFIG_IBM_EMAC_ZMII 2916 dev->features |= EMAC_FTR_HAS_ZMII; 2917 #else 2918 printk(KERN_ERR "%s: ZMII support not enabled !\n", 2919 np->full_name); 2920 return -ENXIO; 2921 #endif 2922 } 2923 2924 if (dev->rgmii_ph != 0) { 2925 #ifdef CONFIG_IBM_EMAC_RGMII 2926 dev->features |= EMAC_FTR_HAS_RGMII; 2927 #else 2928 printk(KERN_ERR "%s: RGMII support not enabled !\n", 2929 np->full_name); 2930 return -ENXIO; 2931 #endif 2932 } 2933 2934 /* Read MAC-address */ 2935 p = of_get_property(np, "local-mac-address", NULL); 2936 if (p == NULL) { 2937 printk(KERN_ERR "%s: Can't find local-mac-address property\n", 2938 np->full_name); 2939 return -ENXIO; 2940 } 2941 memcpy(dev->ndev->dev_addr, p, ETH_ALEN); 2942 2943 /* IAHT and GAHT filter parameterization */ 2944 if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { 2945 dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT; 2946 dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT; 2947 } else { 2948 dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT; 2949 dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT; 2950 } 2951 2952 DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE); 2953 DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige); 2954 DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige); 2955 DBG(dev, "max_mtu : %d\n", dev->max_mtu); 2956 DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq); 2957 2958 return 0; 2959 } 2960 2961 static const struct net_device_ops emac_netdev_ops = { 2962 .ndo_open = emac_open, 2963 .ndo_stop = emac_close, 2964 .ndo_get_stats = emac_stats, 2965 .ndo_set_rx_mode = emac_set_multicast_list, 2966 .ndo_do_ioctl = emac_ioctl, 2967 .ndo_tx_timeout = emac_tx_timeout, 2968 .ndo_validate_addr = eth_validate_addr, 2969 .ndo_set_mac_address = emac_set_mac_address, 2970 .ndo_start_xmit = emac_start_xmit, 2971 }; 2972 2973 static const struct net_device_ops emac_gige_netdev_ops = { 2974 .ndo_open = emac_open, 2975 .ndo_stop = emac_close, 2976 .ndo_get_stats = emac_stats, 2977 .ndo_set_rx_mode = emac_set_multicast_list, 2978 .ndo_do_ioctl = emac_ioctl, 2979 .ndo_tx_timeout = emac_tx_timeout, 2980 .ndo_validate_addr = eth_validate_addr, 2981 .ndo_set_mac_address = emac_set_mac_address, 2982 .ndo_start_xmit = emac_start_xmit_sg, 2983 .ndo_change_mtu = emac_change_mtu, 2984 }; 2985 2986 static int emac_probe(struct platform_device *ofdev) 2987 { 2988 struct net_device *ndev; 2989 struct emac_instance *dev; 2990 struct device_node *np = ofdev->dev.of_node; 2991 struct device_node **blist = NULL; 2992 int err, i; 2993 2994 /* Skip unused/unwired EMACS. We leave the check for an unused 2995 * property here for now, but new flat device trees should set a 2996 * status property to "disabled" instead. 2997 */ 2998 if (of_get_property(np, "unused", NULL) || !of_device_is_available(np)) 2999 return -ENODEV; 3000 3001 /* Find ourselves in the bootlist if we are there */ 3002 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) 3003 if (emac_boot_list[i] == np) 3004 blist = &emac_boot_list[i]; 3005 3006 /* Allocate our net_device structure */ 3007 err = -ENOMEM; 3008 ndev = alloc_etherdev(sizeof(struct emac_instance)); 3009 if (!ndev) 3010 goto err_gone; 3011 3012 dev = netdev_priv(ndev); 3013 dev->ndev = ndev; 3014 dev->ofdev = ofdev; 3015 dev->blist = blist; 3016 SET_NETDEV_DEV(ndev, &ofdev->dev); 3017 3018 /* Initialize some embedded data structures */ 3019 mutex_init(&dev->mdio_lock); 3020 mutex_init(&dev->link_lock); 3021 spin_lock_init(&dev->lock); 3022 INIT_WORK(&dev->reset_work, emac_reset_work); 3023 3024 /* Init various config data based on device-tree */ 3025 err = emac_init_config(dev); 3026 if (err != 0) 3027 goto err_free; 3028 3029 /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */ 3030 dev->emac_irq = irq_of_parse_and_map(np, 0); 3031 dev->wol_irq = irq_of_parse_and_map(np, 1); 3032 if (!dev->emac_irq) { 3033 printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name); 3034 goto err_free; 3035 } 3036 ndev->irq = dev->emac_irq; 3037 3038 /* Map EMAC regs */ 3039 if (of_address_to_resource(np, 0, &dev->rsrc_regs)) { 3040 printk(KERN_ERR "%s: Can't get registers address\n", 3041 np->full_name); 3042 goto err_irq_unmap; 3043 } 3044 // TODO : request_mem_region 3045 dev->emacp = ioremap(dev->rsrc_regs.start, 3046 resource_size(&dev->rsrc_regs)); 3047 if (dev->emacp == NULL) { 3048 printk(KERN_ERR "%s: Can't map device registers!\n", 3049 np->full_name); 3050 err = -ENOMEM; 3051 goto err_irq_unmap; 3052 } 3053 3054 /* Wait for dependent devices */ 3055 err = emac_wait_deps(dev); 3056 if (err) { 3057 printk(KERN_ERR 3058 "%s: Timeout waiting for dependent devices\n", 3059 np->full_name); 3060 /* display more info about what's missing ? */ 3061 goto err_reg_unmap; 3062 } 3063 dev->mal = platform_get_drvdata(dev->mal_dev); 3064 if (dev->mdio_dev != NULL) 3065 dev->mdio_instance = platform_get_drvdata(dev->mdio_dev); 3066 3067 /* Register with MAL */ 3068 dev->commac.ops = &emac_commac_ops; 3069 dev->commac.dev = dev; 3070 dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan); 3071 dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan); 3072 err = mal_register_commac(dev->mal, &dev->commac); 3073 if (err) { 3074 printk(KERN_ERR "%s: failed to register with mal %s!\n", 3075 np->full_name, dev->mal_dev->dev.of_node->full_name); 3076 goto err_rel_deps; 3077 } 3078 dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); 3079 dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); 3080 3081 /* Get pointers to BD rings */ 3082 dev->tx_desc = 3083 dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan); 3084 dev->rx_desc = 3085 dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan); 3086 3087 DBG(dev, "tx_desc %p" NL, dev->tx_desc); 3088 DBG(dev, "rx_desc %p" NL, dev->rx_desc); 3089 3090 /* Clean rings */ 3091 memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); 3092 memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); 3093 memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *)); 3094 memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *)); 3095 3096 /* Attach to ZMII, if needed */ 3097 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) && 3098 (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0) 3099 goto err_unreg_commac; 3100 3101 /* Attach to RGMII, if needed */ 3102 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) && 3103 (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0) 3104 goto err_detach_zmii; 3105 3106 /* Attach to TAH, if needed */ 3107 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && 3108 (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0) 3109 goto err_detach_rgmii; 3110 3111 /* Set some link defaults before we can find out real parameters */ 3112 dev->phy.speed = SPEED_100; 3113 dev->phy.duplex = DUPLEX_FULL; 3114 dev->phy.autoneg = AUTONEG_DISABLE; 3115 dev->phy.pause = dev->phy.asym_pause = 0; 3116 dev->stop_timeout = STOP_TIMEOUT_100; 3117 INIT_DELAYED_WORK(&dev->link_work, emac_link_timer); 3118 3119 /* Some SoCs like APM821xx does not support Half Duplex mode. */ 3120 if (emac_has_feature(dev, EMAC_FTR_APM821XX_NO_HALF_DUPLEX)) { 3121 dev->phy_feat_exc = (SUPPORTED_1000baseT_Half | 3122 SUPPORTED_100baseT_Half | 3123 SUPPORTED_10baseT_Half); 3124 } 3125 3126 /* Find PHY if any */ 3127 err = emac_init_phy(dev); 3128 if (err != 0) 3129 goto err_detach_tah; 3130 3131 if (dev->tah_dev) { 3132 ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG; 3133 ndev->features |= ndev->hw_features | NETIF_F_RXCSUM; 3134 } 3135 ndev->watchdog_timeo = 5 * HZ; 3136 if (emac_phy_supports_gige(dev->phy_mode)) { 3137 ndev->netdev_ops = &emac_gige_netdev_ops; 3138 dev->commac.ops = &emac_commac_sg_ops; 3139 } else 3140 ndev->netdev_ops = &emac_netdev_ops; 3141 ndev->ethtool_ops = &emac_ethtool_ops; 3142 3143 /* MTU range: 46 - 1500 or whatever is in OF */ 3144 ndev->min_mtu = EMAC_MIN_MTU; 3145 ndev->max_mtu = dev->max_mtu; 3146 3147 netif_carrier_off(ndev); 3148 3149 err = register_netdev(ndev); 3150 if (err) { 3151 printk(KERN_ERR "%s: failed to register net device (%d)!\n", 3152 np->full_name, err); 3153 goto err_detach_tah; 3154 } 3155 3156 /* Set our drvdata last as we don't want them visible until we are 3157 * fully initialized 3158 */ 3159 wmb(); 3160 platform_set_drvdata(ofdev, dev); 3161 3162 /* There's a new kid in town ! Let's tell everybody */ 3163 wake_up_all(&emac_probe_wait); 3164 3165 3166 printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n", 3167 ndev->name, dev->cell_index, np->full_name, ndev->dev_addr); 3168 3169 if (dev->phy_mode == PHY_MODE_SGMII) 3170 printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name); 3171 3172 if (dev->phy.address >= 0) 3173 printk("%s: found %s PHY (0x%02x)\n", ndev->name, 3174 dev->phy.def->name, dev->phy.address); 3175 3176 emac_dbg_register(dev); 3177 3178 /* Life is good */ 3179 return 0; 3180 3181 /* I have a bad feeling about this ... */ 3182 3183 err_detach_tah: 3184 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 3185 tah_detach(dev->tah_dev, dev->tah_port); 3186 err_detach_rgmii: 3187 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 3188 rgmii_detach(dev->rgmii_dev, dev->rgmii_port); 3189 err_detach_zmii: 3190 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 3191 zmii_detach(dev->zmii_dev, dev->zmii_port); 3192 err_unreg_commac: 3193 mal_unregister_commac(dev->mal, &dev->commac); 3194 err_rel_deps: 3195 emac_put_deps(dev); 3196 err_reg_unmap: 3197 iounmap(dev->emacp); 3198 err_irq_unmap: 3199 if (dev->wol_irq) 3200 irq_dispose_mapping(dev->wol_irq); 3201 if (dev->emac_irq) 3202 irq_dispose_mapping(dev->emac_irq); 3203 err_free: 3204 free_netdev(ndev); 3205 err_gone: 3206 /* if we were on the bootlist, remove us as we won't show up and 3207 * wake up all waiters to notify them in case they were waiting 3208 * on us 3209 */ 3210 if (blist) { 3211 *blist = NULL; 3212 wake_up_all(&emac_probe_wait); 3213 } 3214 return err; 3215 } 3216 3217 static int emac_remove(struct platform_device *ofdev) 3218 { 3219 struct emac_instance *dev = platform_get_drvdata(ofdev); 3220 3221 DBG(dev, "remove" NL); 3222 3223 unregister_netdev(dev->ndev); 3224 3225 cancel_work_sync(&dev->reset_work); 3226 3227 if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) 3228 tah_detach(dev->tah_dev, dev->tah_port); 3229 if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) 3230 rgmii_detach(dev->rgmii_dev, dev->rgmii_port); 3231 if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) 3232 zmii_detach(dev->zmii_dev, dev->zmii_port); 3233 3234 if (dev->phy_dev) 3235 phy_disconnect(dev->phy_dev); 3236 3237 if (dev->mii_bus) 3238 mdiobus_unregister(dev->mii_bus); 3239 3240 busy_phy_map &= ~(1 << dev->phy.address); 3241 DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map); 3242 3243 mal_unregister_commac(dev->mal, &dev->commac); 3244 emac_put_deps(dev); 3245 3246 emac_dbg_unregister(dev); 3247 iounmap(dev->emacp); 3248 3249 if (dev->wol_irq) 3250 irq_dispose_mapping(dev->wol_irq); 3251 if (dev->emac_irq) 3252 irq_dispose_mapping(dev->emac_irq); 3253 3254 free_netdev(dev->ndev); 3255 3256 return 0; 3257 } 3258 3259 /* XXX Features in here should be replaced by properties... */ 3260 static const struct of_device_id emac_match[] = 3261 { 3262 { 3263 .type = "network", 3264 .compatible = "ibm,emac", 3265 }, 3266 { 3267 .type = "network", 3268 .compatible = "ibm,emac4", 3269 }, 3270 { 3271 .type = "network", 3272 .compatible = "ibm,emac4sync", 3273 }, 3274 {}, 3275 }; 3276 MODULE_DEVICE_TABLE(of, emac_match); 3277 3278 static struct platform_driver emac_driver = { 3279 .driver = { 3280 .name = "emac", 3281 .of_match_table = emac_match, 3282 }, 3283 .probe = emac_probe, 3284 .remove = emac_remove, 3285 }; 3286 3287 static void __init emac_make_bootlist(void) 3288 { 3289 struct device_node *np = NULL; 3290 int j, max, i = 0; 3291 int cell_indices[EMAC_BOOT_LIST_SIZE]; 3292 3293 /* Collect EMACs */ 3294 while((np = of_find_all_nodes(np)) != NULL) { 3295 const u32 *idx; 3296 3297 if (of_match_node(emac_match, np) == NULL) 3298 continue; 3299 if (of_get_property(np, "unused", NULL)) 3300 continue; 3301 idx = of_get_property(np, "cell-index", NULL); 3302 if (idx == NULL) 3303 continue; 3304 cell_indices[i] = *idx; 3305 emac_boot_list[i++] = of_node_get(np); 3306 if (i >= EMAC_BOOT_LIST_SIZE) { 3307 of_node_put(np); 3308 break; 3309 } 3310 } 3311 max = i; 3312 3313 /* Bubble sort them (doh, what a creative algorithm :-) */ 3314 for (i = 0; max > 1 && (i < (max - 1)); i++) 3315 for (j = i; j < max; j++) { 3316 if (cell_indices[i] > cell_indices[j]) { 3317 swap(emac_boot_list[i], emac_boot_list[j]); 3318 swap(cell_indices[i], cell_indices[j]); 3319 } 3320 } 3321 } 3322 3323 static int __init emac_init(void) 3324 { 3325 int rc; 3326 3327 printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); 3328 3329 /* Init debug stuff */ 3330 emac_init_debug(); 3331 3332 /* Build EMAC boot list */ 3333 emac_make_bootlist(); 3334 3335 /* Init submodules */ 3336 rc = mal_init(); 3337 if (rc) 3338 goto err; 3339 rc = zmii_init(); 3340 if (rc) 3341 goto err_mal; 3342 rc = rgmii_init(); 3343 if (rc) 3344 goto err_zmii; 3345 rc = tah_init(); 3346 if (rc) 3347 goto err_rgmii; 3348 rc = platform_driver_register(&emac_driver); 3349 if (rc) 3350 goto err_tah; 3351 3352 return 0; 3353 3354 err_tah: 3355 tah_exit(); 3356 err_rgmii: 3357 rgmii_exit(); 3358 err_zmii: 3359 zmii_exit(); 3360 err_mal: 3361 mal_exit(); 3362 err: 3363 return rc; 3364 } 3365 3366 static void __exit emac_exit(void) 3367 { 3368 int i; 3369 3370 platform_driver_unregister(&emac_driver); 3371 3372 tah_exit(); 3373 rgmii_exit(); 3374 zmii_exit(); 3375 mal_exit(); 3376 emac_fini_debug(); 3377 3378 /* Destroy EMAC boot list */ 3379 for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) 3380 of_node_put(emac_boot_list[i]); 3381 } 3382 3383 module_init(emac_init); 3384 module_exit(emac_exit); 3385