1 /* 2 * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx. 3 * Copyright (c) 1997 Dan Malek (dmalek@jlc.net) 4 * 5 * Right now, I am very wasteful with the buffers. I allocate memory 6 * pages and then divide them into 2K frame buffers. This way I know I 7 * have buffers large enough to hold one frame within one buffer descriptor. 8 * Once I get this working, I will use 64 or 128 byte CPM buffers, which 9 * will be much more memory efficient and will easily handle lots of 10 * small packets. 11 * 12 * Much better multiple PHY support by Magnus Damm. 13 * Copyright (c) 2000 Ericsson Radio Systems AB. 14 * 15 * Support for FEC controller of ColdFire processors. 16 * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com) 17 * 18 * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be) 19 * Copyright (c) 2004-2006 Macq Electronique SA. 20 * 21 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. 22 */ 23 24 #include <linux/module.h> 25 #include <linux/kernel.h> 26 #include <linux/string.h> 27 #include <linux/ptrace.h> 28 #include <linux/errno.h> 29 #include <linux/ioport.h> 30 #include <linux/slab.h> 31 #include <linux/interrupt.h> 32 #include <linux/delay.h> 33 #include <linux/netdevice.h> 34 #include <linux/etherdevice.h> 35 #include <linux/skbuff.h> 36 #include <linux/in.h> 37 #include <linux/ip.h> 38 #include <net/ip.h> 39 #include <net/tso.h> 40 #include <linux/tcp.h> 41 #include <linux/udp.h> 42 #include <linux/icmp.h> 43 #include <linux/spinlock.h> 44 #include <linux/workqueue.h> 45 #include <linux/bitops.h> 46 #include <linux/io.h> 47 #include <linux/irq.h> 48 #include <linux/clk.h> 49 #include <linux/platform_device.h> 50 #include <linux/phy.h> 51 #include <linux/fec.h> 52 #include <linux/of.h> 53 #include <linux/of_device.h> 54 #include <linux/of_gpio.h> 55 #include <linux/of_mdio.h> 56 #include <linux/of_net.h> 57 #include <linux/regulator/consumer.h> 58 #include <linux/if_vlan.h> 59 #include <linux/pinctrl/consumer.h> 60 61 #include <asm/cacheflush.h> 62 63 #include "fec.h" 64 65 static void set_multicast_list(struct net_device *ndev); 66 67 #if defined(CONFIG_ARM) 68 #define FEC_ALIGNMENT 0xf 69 #else 70 #define FEC_ALIGNMENT 0x3 71 #endif 72 73 #define DRIVER_NAME "fec" 74 75 /* Pause frame feild and FIFO threshold */ 76 #define FEC_ENET_FCE (1 << 5) 77 #define FEC_ENET_RSEM_V 0x84 78 #define FEC_ENET_RSFL_V 16 79 #define FEC_ENET_RAEM_V 0x8 80 #define FEC_ENET_RAFL_V 0x8 81 #define FEC_ENET_OPD_V 0xFFF0 82 83 /* Controller is ENET-MAC */ 84 #define FEC_QUIRK_ENET_MAC (1 << 0) 85 /* Controller needs driver to swap frame */ 86 #define FEC_QUIRK_SWAP_FRAME (1 << 1) 87 /* Controller uses gasket */ 88 #define FEC_QUIRK_USE_GASKET (1 << 2) 89 /* Controller has GBIT support */ 90 #define FEC_QUIRK_HAS_GBIT (1 << 3) 91 /* Controller has extend desc buffer */ 92 #define FEC_QUIRK_HAS_BUFDESC_EX (1 << 4) 93 /* Controller has hardware checksum support */ 94 #define FEC_QUIRK_HAS_CSUM (1 << 5) 95 /* Controller has hardware vlan support */ 96 #define FEC_QUIRK_HAS_VLAN (1 << 6) 97 /* ENET IP errata ERR006358 98 * 99 * If the ready bit in the transmit buffer descriptor (TxBD[R]) is previously 100 * detected as not set during a prior frame transmission, then the 101 * ENET_TDAR[TDAR] bit is cleared at a later time, even if additional TxBDs 102 * were added to the ring and the ENET_TDAR[TDAR] bit is set. This results in 103 * frames not being transmitted until there is a 0-to-1 transition on 104 * ENET_TDAR[TDAR]. 105 */ 106 #define FEC_QUIRK_ERR006358 (1 << 7) 107 108 static struct platform_device_id fec_devtype[] = { 109 { 110 /* keep it for coldfire */ 111 .name = DRIVER_NAME, 112 .driver_data = 0, 113 }, { 114 .name = "imx25-fec", 115 .driver_data = FEC_QUIRK_USE_GASKET, 116 }, { 117 .name = "imx27-fec", 118 .driver_data = 0, 119 }, { 120 .name = "imx28-fec", 121 .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME, 122 }, { 123 .name = "imx6q-fec", 124 .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 125 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 126 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358, 127 }, { 128 .name = "mvf600-fec", 129 .driver_data = FEC_QUIRK_ENET_MAC, 130 }, { 131 /* sentinel */ 132 } 133 }; 134 MODULE_DEVICE_TABLE(platform, fec_devtype); 135 136 enum imx_fec_type { 137 IMX25_FEC = 1, /* runs on i.mx25/50/53 */ 138 IMX27_FEC, /* runs on i.mx27/35/51 */ 139 IMX28_FEC, 140 IMX6Q_FEC, 141 MVF600_FEC, 142 }; 143 144 static const struct of_device_id fec_dt_ids[] = { 145 { .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], }, 146 { .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], }, 147 { .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], }, 148 { .compatible = "fsl,imx6q-fec", .data = &fec_devtype[IMX6Q_FEC], }, 149 { .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], }, 150 { /* sentinel */ } 151 }; 152 MODULE_DEVICE_TABLE(of, fec_dt_ids); 153 154 static unsigned char macaddr[ETH_ALEN]; 155 module_param_array(macaddr, byte, NULL, 0); 156 MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); 157 158 #if defined(CONFIG_M5272) 159 /* 160 * Some hardware gets it MAC address out of local flash memory. 161 * if this is non-zero then assume it is the address to get MAC from. 162 */ 163 #if defined(CONFIG_NETtel) 164 #define FEC_FLASHMAC 0xf0006006 165 #elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES) 166 #define FEC_FLASHMAC 0xf0006000 167 #elif defined(CONFIG_CANCam) 168 #define FEC_FLASHMAC 0xf0020000 169 #elif defined (CONFIG_M5272C3) 170 #define FEC_FLASHMAC (0xffe04000 + 4) 171 #elif defined(CONFIG_MOD5272) 172 #define FEC_FLASHMAC 0xffc0406b 173 #else 174 #define FEC_FLASHMAC 0 175 #endif 176 #endif /* CONFIG_M5272 */ 177 178 /* Interrupt events/masks. */ 179 #define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */ 180 #define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */ 181 #define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */ 182 #define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */ 183 #define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */ 184 #define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */ 185 #define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */ 186 #define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */ 187 #define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */ 188 #define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */ 189 190 #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII) 191 #define FEC_RX_DISABLED_IMASK (FEC_DEFAULT_IMASK & (~FEC_ENET_RXF)) 192 193 /* The FEC stores dest/src/type/vlan, data, and checksum for receive packets. 194 */ 195 #define PKT_MAXBUF_SIZE 1522 196 #define PKT_MINBUF_SIZE 64 197 #define PKT_MAXBLR_SIZE 1536 198 199 /* FEC receive acceleration */ 200 #define FEC_RACC_IPDIS (1 << 1) 201 #define FEC_RACC_PRODIS (1 << 2) 202 #define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS) 203 204 /* 205 * The 5270/5271/5280/5282/532x RX control register also contains maximum frame 206 * size bits. Other FEC hardware does not, so we need to take that into 207 * account when setting it. 208 */ 209 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ 210 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) 211 #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16) 212 #else 213 #define OPT_FRAME_SIZE 0 214 #endif 215 216 /* FEC MII MMFR bits definition */ 217 #define FEC_MMFR_ST (1 << 30) 218 #define FEC_MMFR_OP_READ (2 << 28) 219 #define FEC_MMFR_OP_WRITE (1 << 28) 220 #define FEC_MMFR_PA(v) ((v & 0x1f) << 23) 221 #define FEC_MMFR_RA(v) ((v & 0x1f) << 18) 222 #define FEC_MMFR_TA (2 << 16) 223 #define FEC_MMFR_DATA(v) (v & 0xffff) 224 225 #define FEC_MII_TIMEOUT 30000 /* us */ 226 227 /* Transmitter timeout */ 228 #define TX_TIMEOUT (2 * HZ) 229 230 #define FEC_PAUSE_FLAG_AUTONEG 0x1 231 #define FEC_PAUSE_FLAG_ENABLE 0x2 232 233 #define TSO_HEADER_SIZE 128 234 /* Max number of allowed TCP segments for software TSO */ 235 #define FEC_MAX_TSO_SEGS 100 236 #define FEC_MAX_SKB_DESCS (FEC_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 237 238 #define IS_TSO_HEADER(txq, addr) \ 239 ((addr >= txq->tso_hdrs_dma) && \ 240 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE)) 241 242 static int mii_cnt; 243 244 static inline 245 struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp, struct fec_enet_private *fep) 246 { 247 struct bufdesc *new_bd = bdp + 1; 248 struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp + 1; 249 struct bufdesc_ex *ex_base; 250 struct bufdesc *base; 251 int ring_size; 252 253 if (bdp >= fep->tx_bd_base) { 254 base = fep->tx_bd_base; 255 ring_size = fep->tx_ring_size; 256 ex_base = (struct bufdesc_ex *)fep->tx_bd_base; 257 } else { 258 base = fep->rx_bd_base; 259 ring_size = fep->rx_ring_size; 260 ex_base = (struct bufdesc_ex *)fep->rx_bd_base; 261 } 262 263 if (fep->bufdesc_ex) 264 return (struct bufdesc *)((ex_new_bd >= (ex_base + ring_size)) ? 265 ex_base : ex_new_bd); 266 else 267 return (new_bd >= (base + ring_size)) ? 268 base : new_bd; 269 } 270 271 static inline 272 struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp, struct fec_enet_private *fep) 273 { 274 struct bufdesc *new_bd = bdp - 1; 275 struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp - 1; 276 struct bufdesc_ex *ex_base; 277 struct bufdesc *base; 278 int ring_size; 279 280 if (bdp >= fep->tx_bd_base) { 281 base = fep->tx_bd_base; 282 ring_size = fep->tx_ring_size; 283 ex_base = (struct bufdesc_ex *)fep->tx_bd_base; 284 } else { 285 base = fep->rx_bd_base; 286 ring_size = fep->rx_ring_size; 287 ex_base = (struct bufdesc_ex *)fep->rx_bd_base; 288 } 289 290 if (fep->bufdesc_ex) 291 return (struct bufdesc *)((ex_new_bd < ex_base) ? 292 (ex_new_bd + ring_size) : ex_new_bd); 293 else 294 return (new_bd < base) ? (new_bd + ring_size) : new_bd; 295 } 296 297 static int fec_enet_get_bd_index(struct bufdesc *base, struct bufdesc *bdp, 298 struct fec_enet_private *fep) 299 { 300 return ((const char *)bdp - (const char *)base) / fep->bufdesc_size; 301 } 302 303 static int fec_enet_get_free_txdesc_num(struct fec_enet_private *fep) 304 { 305 int entries; 306 307 entries = ((const char *)fep->dirty_tx - 308 (const char *)fep->cur_tx) / fep->bufdesc_size - 1; 309 310 return entries > 0 ? entries : entries + fep->tx_ring_size; 311 } 312 313 static void *swap_buffer(void *bufaddr, int len) 314 { 315 int i; 316 unsigned int *buf = bufaddr; 317 318 for (i = 0; i < DIV_ROUND_UP(len, 4); i++, buf++) 319 *buf = cpu_to_be32(*buf); 320 321 return bufaddr; 322 } 323 324 static void fec_dump(struct net_device *ndev) 325 { 326 struct fec_enet_private *fep = netdev_priv(ndev); 327 struct bufdesc *bdp = fep->tx_bd_base; 328 unsigned int index = 0; 329 330 netdev_info(ndev, "TX ring dump\n"); 331 pr_info("Nr SC addr len SKB\n"); 332 333 do { 334 pr_info("%3u %c%c 0x%04x 0x%08lx %4u %p\n", 335 index, 336 bdp == fep->cur_tx ? 'S' : ' ', 337 bdp == fep->dirty_tx ? 'H' : ' ', 338 bdp->cbd_sc, bdp->cbd_bufaddr, bdp->cbd_datlen, 339 fep->tx_skbuff[index]); 340 bdp = fec_enet_get_nextdesc(bdp, fep); 341 index++; 342 } while (bdp != fep->tx_bd_base); 343 } 344 345 static inline bool is_ipv4_pkt(struct sk_buff *skb) 346 { 347 return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4; 348 } 349 350 static int 351 fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev) 352 { 353 /* Only run for packets requiring a checksum. */ 354 if (skb->ip_summed != CHECKSUM_PARTIAL) 355 return 0; 356 357 if (unlikely(skb_cow_head(skb, 0))) 358 return -1; 359 360 if (is_ipv4_pkt(skb)) 361 ip_hdr(skb)->check = 0; 362 *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0; 363 364 return 0; 365 } 366 367 static int 368 fec_enet_txq_submit_frag_skb(struct sk_buff *skb, struct net_device *ndev) 369 { 370 struct fec_enet_private *fep = netdev_priv(ndev); 371 const struct platform_device_id *id_entry = 372 platform_get_device_id(fep->pdev); 373 struct bufdesc *bdp = fep->cur_tx; 374 struct bufdesc_ex *ebdp; 375 int nr_frags = skb_shinfo(skb)->nr_frags; 376 int frag, frag_len; 377 unsigned short status; 378 unsigned int estatus = 0; 379 skb_frag_t *this_frag; 380 unsigned int index; 381 void *bufaddr; 382 dma_addr_t addr; 383 int i; 384 385 for (frag = 0; frag < nr_frags; frag++) { 386 this_frag = &skb_shinfo(skb)->frags[frag]; 387 bdp = fec_enet_get_nextdesc(bdp, fep); 388 ebdp = (struct bufdesc_ex *)bdp; 389 390 status = bdp->cbd_sc; 391 status &= ~BD_ENET_TX_STATS; 392 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 393 frag_len = skb_shinfo(skb)->frags[frag].size; 394 395 /* Handle the last BD specially */ 396 if (frag == nr_frags - 1) { 397 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 398 if (fep->bufdesc_ex) { 399 estatus |= BD_ENET_TX_INT; 400 if (unlikely(skb_shinfo(skb)->tx_flags & 401 SKBTX_HW_TSTAMP && fep->hwts_tx_en)) 402 estatus |= BD_ENET_TX_TS; 403 } 404 } 405 406 if (fep->bufdesc_ex) { 407 if (skb->ip_summed == CHECKSUM_PARTIAL) 408 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 409 ebdp->cbd_bdu = 0; 410 ebdp->cbd_esc = estatus; 411 } 412 413 bufaddr = page_address(this_frag->page.p) + this_frag->page_offset; 414 415 index = fec_enet_get_bd_index(fep->tx_bd_base, bdp, fep); 416 if (((unsigned long) bufaddr) & FEC_ALIGNMENT || 417 id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) { 418 memcpy(fep->tx_bounce[index], bufaddr, frag_len); 419 bufaddr = fep->tx_bounce[index]; 420 421 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) 422 swap_buffer(bufaddr, frag_len); 423 } 424 425 addr = dma_map_single(&fep->pdev->dev, bufaddr, frag_len, 426 DMA_TO_DEVICE); 427 if (dma_mapping_error(&fep->pdev->dev, addr)) { 428 dev_kfree_skb_any(skb); 429 if (net_ratelimit()) 430 netdev_err(ndev, "Tx DMA memory map failed\n"); 431 goto dma_mapping_error; 432 } 433 434 bdp->cbd_bufaddr = addr; 435 bdp->cbd_datlen = frag_len; 436 bdp->cbd_sc = status; 437 } 438 439 fep->cur_tx = bdp; 440 441 return 0; 442 443 dma_mapping_error: 444 bdp = fep->cur_tx; 445 for (i = 0; i < frag; i++) { 446 bdp = fec_enet_get_nextdesc(bdp, fep); 447 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 448 bdp->cbd_datlen, DMA_TO_DEVICE); 449 } 450 return NETDEV_TX_OK; 451 } 452 453 static int fec_enet_txq_submit_skb(struct sk_buff *skb, struct net_device *ndev) 454 { 455 struct fec_enet_private *fep = netdev_priv(ndev); 456 const struct platform_device_id *id_entry = 457 platform_get_device_id(fep->pdev); 458 int nr_frags = skb_shinfo(skb)->nr_frags; 459 struct bufdesc *bdp, *last_bdp; 460 void *bufaddr; 461 dma_addr_t addr; 462 unsigned short status; 463 unsigned short buflen; 464 unsigned int estatus = 0; 465 unsigned int index; 466 int entries_free; 467 int ret; 468 469 entries_free = fec_enet_get_free_txdesc_num(fep); 470 if (entries_free < MAX_SKB_FRAGS + 1) { 471 dev_kfree_skb_any(skb); 472 if (net_ratelimit()) 473 netdev_err(ndev, "NOT enough BD for SG!\n"); 474 return NETDEV_TX_OK; 475 } 476 477 /* Protocol checksum off-load for TCP and UDP. */ 478 if (fec_enet_clear_csum(skb, ndev)) { 479 dev_kfree_skb_any(skb); 480 return NETDEV_TX_OK; 481 } 482 483 /* Fill in a Tx ring entry */ 484 bdp = fep->cur_tx; 485 status = bdp->cbd_sc; 486 status &= ~BD_ENET_TX_STATS; 487 488 /* Set buffer length and buffer pointer */ 489 bufaddr = skb->data; 490 buflen = skb_headlen(skb); 491 492 index = fec_enet_get_bd_index(fep->tx_bd_base, bdp, fep); 493 if (((unsigned long) bufaddr) & FEC_ALIGNMENT || 494 id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) { 495 memcpy(fep->tx_bounce[index], skb->data, buflen); 496 bufaddr = fep->tx_bounce[index]; 497 498 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) 499 swap_buffer(bufaddr, buflen); 500 } 501 502 /* Push the data cache so the CPM does not get stale memory data. */ 503 addr = dma_map_single(&fep->pdev->dev, bufaddr, buflen, DMA_TO_DEVICE); 504 if (dma_mapping_error(&fep->pdev->dev, addr)) { 505 dev_kfree_skb_any(skb); 506 if (net_ratelimit()) 507 netdev_err(ndev, "Tx DMA memory map failed\n"); 508 return NETDEV_TX_OK; 509 } 510 511 if (nr_frags) { 512 ret = fec_enet_txq_submit_frag_skb(skb, ndev); 513 if (ret) 514 return ret; 515 } else { 516 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 517 if (fep->bufdesc_ex) { 518 estatus = BD_ENET_TX_INT; 519 if (unlikely(skb_shinfo(skb)->tx_flags & 520 SKBTX_HW_TSTAMP && fep->hwts_tx_en)) 521 estatus |= BD_ENET_TX_TS; 522 } 523 } 524 525 if (fep->bufdesc_ex) { 526 527 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 528 529 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 530 fep->hwts_tx_en)) 531 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 532 533 if (skb->ip_summed == CHECKSUM_PARTIAL) 534 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 535 536 ebdp->cbd_bdu = 0; 537 ebdp->cbd_esc = estatus; 538 } 539 540 last_bdp = fep->cur_tx; 541 index = fec_enet_get_bd_index(fep->tx_bd_base, last_bdp, fep); 542 /* Save skb pointer */ 543 fep->tx_skbuff[index] = skb; 544 545 bdp->cbd_datlen = buflen; 546 bdp->cbd_bufaddr = addr; 547 548 /* Send it on its way. Tell FEC it's ready, interrupt when done, 549 * it's the last BD of the frame, and to put the CRC on the end. 550 */ 551 status |= (BD_ENET_TX_READY | BD_ENET_TX_TC); 552 bdp->cbd_sc = status; 553 554 /* If this was the last BD in the ring, start at the beginning again. */ 555 bdp = fec_enet_get_nextdesc(last_bdp, fep); 556 557 skb_tx_timestamp(skb); 558 559 fep->cur_tx = bdp; 560 561 /* Trigger transmission start */ 562 writel(0, fep->hwp + FEC_X_DES_ACTIVE); 563 564 return 0; 565 } 566 567 static int 568 fec_enet_txq_put_data_tso(struct sk_buff *skb, struct net_device *ndev, 569 struct bufdesc *bdp, int index, char *data, 570 int size, bool last_tcp, bool is_last) 571 { 572 struct fec_enet_private *fep = netdev_priv(ndev); 573 const struct platform_device_id *id_entry = 574 platform_get_device_id(fep->pdev); 575 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 576 unsigned short status; 577 unsigned int estatus = 0; 578 dma_addr_t addr; 579 580 status = bdp->cbd_sc; 581 status &= ~BD_ENET_TX_STATS; 582 583 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 584 585 if (((unsigned long) data) & FEC_ALIGNMENT || 586 id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) { 587 memcpy(fep->tx_bounce[index], data, size); 588 data = fep->tx_bounce[index]; 589 590 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) 591 swap_buffer(data, size); 592 } 593 594 addr = dma_map_single(&fep->pdev->dev, data, size, DMA_TO_DEVICE); 595 if (dma_mapping_error(&fep->pdev->dev, addr)) { 596 dev_kfree_skb_any(skb); 597 if (net_ratelimit()) 598 netdev_err(ndev, "Tx DMA memory map failed\n"); 599 return NETDEV_TX_BUSY; 600 } 601 602 bdp->cbd_datlen = size; 603 bdp->cbd_bufaddr = addr; 604 605 if (fep->bufdesc_ex) { 606 if (skb->ip_summed == CHECKSUM_PARTIAL) 607 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 608 ebdp->cbd_bdu = 0; 609 ebdp->cbd_esc = estatus; 610 } 611 612 /* Handle the last BD specially */ 613 if (last_tcp) 614 status |= (BD_ENET_TX_LAST | BD_ENET_TX_TC); 615 if (is_last) { 616 status |= BD_ENET_TX_INTR; 617 if (fep->bufdesc_ex) 618 ebdp->cbd_esc |= BD_ENET_TX_INT; 619 } 620 621 bdp->cbd_sc = status; 622 623 return 0; 624 } 625 626 static int 627 fec_enet_txq_put_hdr_tso(struct sk_buff *skb, struct net_device *ndev, 628 struct bufdesc *bdp, int index) 629 { 630 struct fec_enet_private *fep = netdev_priv(ndev); 631 const struct platform_device_id *id_entry = 632 platform_get_device_id(fep->pdev); 633 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 634 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 635 void *bufaddr; 636 unsigned long dmabuf; 637 unsigned short status; 638 unsigned int estatus = 0; 639 640 status = bdp->cbd_sc; 641 status &= ~BD_ENET_TX_STATS; 642 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 643 644 bufaddr = fep->tso_hdrs + index * TSO_HEADER_SIZE; 645 dmabuf = fep->tso_hdrs_dma + index * TSO_HEADER_SIZE; 646 if (((unsigned long) bufaddr) & FEC_ALIGNMENT || 647 id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) { 648 memcpy(fep->tx_bounce[index], skb->data, hdr_len); 649 bufaddr = fep->tx_bounce[index]; 650 651 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) 652 swap_buffer(bufaddr, hdr_len); 653 654 dmabuf = dma_map_single(&fep->pdev->dev, bufaddr, 655 hdr_len, DMA_TO_DEVICE); 656 if (dma_mapping_error(&fep->pdev->dev, dmabuf)) { 657 dev_kfree_skb_any(skb); 658 if (net_ratelimit()) 659 netdev_err(ndev, "Tx DMA memory map failed\n"); 660 return NETDEV_TX_BUSY; 661 } 662 } 663 664 bdp->cbd_bufaddr = dmabuf; 665 bdp->cbd_datlen = hdr_len; 666 667 if (fep->bufdesc_ex) { 668 if (skb->ip_summed == CHECKSUM_PARTIAL) 669 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 670 ebdp->cbd_bdu = 0; 671 ebdp->cbd_esc = estatus; 672 } 673 674 bdp->cbd_sc = status; 675 676 return 0; 677 } 678 679 static int fec_enet_txq_submit_tso(struct sk_buff *skb, struct net_device *ndev) 680 { 681 struct fec_enet_private *fep = netdev_priv(ndev); 682 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 683 int total_len, data_left; 684 struct bufdesc *bdp = fep->cur_tx; 685 struct tso_t tso; 686 unsigned int index = 0; 687 int ret; 688 689 if (tso_count_descs(skb) >= fec_enet_get_free_txdesc_num(fep)) { 690 dev_kfree_skb_any(skb); 691 if (net_ratelimit()) 692 netdev_err(ndev, "NOT enough BD for TSO!\n"); 693 return NETDEV_TX_OK; 694 } 695 696 /* Protocol checksum off-load for TCP and UDP. */ 697 if (fec_enet_clear_csum(skb, ndev)) { 698 dev_kfree_skb_any(skb); 699 return NETDEV_TX_OK; 700 } 701 702 /* Initialize the TSO handler, and prepare the first payload */ 703 tso_start(skb, &tso); 704 705 total_len = skb->len - hdr_len; 706 while (total_len > 0) { 707 char *hdr; 708 709 index = fec_enet_get_bd_index(fep->tx_bd_base, bdp, fep); 710 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 711 total_len -= data_left; 712 713 /* prepare packet headers: MAC + IP + TCP */ 714 hdr = fep->tso_hdrs + index * TSO_HEADER_SIZE; 715 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 716 ret = fec_enet_txq_put_hdr_tso(skb, ndev, bdp, index); 717 if (ret) 718 goto err_release; 719 720 while (data_left > 0) { 721 int size; 722 723 size = min_t(int, tso.size, data_left); 724 bdp = fec_enet_get_nextdesc(bdp, fep); 725 index = fec_enet_get_bd_index(fep->tx_bd_base, bdp, fep); 726 ret = fec_enet_txq_put_data_tso(skb, ndev, bdp, index, tso.data, 727 size, size == data_left, 728 total_len == 0); 729 if (ret) 730 goto err_release; 731 732 data_left -= size; 733 tso_build_data(skb, &tso, size); 734 } 735 736 bdp = fec_enet_get_nextdesc(bdp, fep); 737 } 738 739 /* Save skb pointer */ 740 fep->tx_skbuff[index] = skb; 741 742 skb_tx_timestamp(skb); 743 fep->cur_tx = bdp; 744 745 /* Trigger transmission start */ 746 writel(0, fep->hwp + FEC_X_DES_ACTIVE); 747 748 return 0; 749 750 err_release: 751 /* TODO: Release all used data descriptors for TSO */ 752 return ret; 753 } 754 755 static netdev_tx_t 756 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev) 757 { 758 struct fec_enet_private *fep = netdev_priv(ndev); 759 int entries_free; 760 int ret; 761 762 if (skb_is_gso(skb)) 763 ret = fec_enet_txq_submit_tso(skb, ndev); 764 else 765 ret = fec_enet_txq_submit_skb(skb, ndev); 766 if (ret) 767 return ret; 768 769 entries_free = fec_enet_get_free_txdesc_num(fep); 770 if (entries_free <= fep->tx_stop_threshold) 771 netif_stop_queue(ndev); 772 773 return NETDEV_TX_OK; 774 } 775 776 /* Init RX & TX buffer descriptors 777 */ 778 static void fec_enet_bd_init(struct net_device *dev) 779 { 780 struct fec_enet_private *fep = netdev_priv(dev); 781 struct bufdesc *bdp; 782 unsigned int i; 783 784 /* Initialize the receive buffer descriptors. */ 785 bdp = fep->rx_bd_base; 786 for (i = 0; i < fep->rx_ring_size; i++) { 787 788 /* Initialize the BD for every fragment in the page. */ 789 if (bdp->cbd_bufaddr) 790 bdp->cbd_sc = BD_ENET_RX_EMPTY; 791 else 792 bdp->cbd_sc = 0; 793 bdp = fec_enet_get_nextdesc(bdp, fep); 794 } 795 796 /* Set the last buffer to wrap */ 797 bdp = fec_enet_get_prevdesc(bdp, fep); 798 bdp->cbd_sc |= BD_SC_WRAP; 799 800 fep->cur_rx = fep->rx_bd_base; 801 802 /* ...and the same for transmit */ 803 bdp = fep->tx_bd_base; 804 fep->cur_tx = bdp; 805 for (i = 0; i < fep->tx_ring_size; i++) { 806 807 /* Initialize the BD for every fragment in the page. */ 808 bdp->cbd_sc = 0; 809 if (fep->tx_skbuff[i]) { 810 dev_kfree_skb_any(fep->tx_skbuff[i]); 811 fep->tx_skbuff[i] = NULL; 812 } 813 bdp->cbd_bufaddr = 0; 814 bdp = fec_enet_get_nextdesc(bdp, fep); 815 } 816 817 /* Set the last buffer to wrap */ 818 bdp = fec_enet_get_prevdesc(bdp, fep); 819 bdp->cbd_sc |= BD_SC_WRAP; 820 fep->dirty_tx = bdp; 821 } 822 823 /* 824 * This function is called to start or restart the FEC during a link 825 * change, transmit timeout, or to reconfigure the FEC. The network 826 * packet processing for this device must be stopped before this call. 827 */ 828 static void 829 fec_restart(struct net_device *ndev) 830 { 831 struct fec_enet_private *fep = netdev_priv(ndev); 832 const struct platform_device_id *id_entry = 833 platform_get_device_id(fep->pdev); 834 int i; 835 u32 val; 836 u32 temp_mac[2]; 837 u32 rcntl = OPT_FRAME_SIZE | 0x04; 838 u32 ecntl = 0x2; /* ETHEREN */ 839 840 /* Whack a reset. We should wait for this. */ 841 writel(1, fep->hwp + FEC_ECNTRL); 842 udelay(10); 843 844 /* 845 * enet-mac reset will reset mac address registers too, 846 * so need to reconfigure it. 847 */ 848 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { 849 memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN); 850 writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW); 851 writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH); 852 } 853 854 /* Clear any outstanding interrupt. */ 855 writel(0xffc00000, fep->hwp + FEC_IEVENT); 856 857 /* Set maximum receive buffer size. */ 858 writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE); 859 860 fec_enet_bd_init(ndev); 861 862 /* Set receive and transmit descriptor base. */ 863 writel(fep->bd_dma, fep->hwp + FEC_R_DES_START); 864 if (fep->bufdesc_ex) 865 writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc_ex) 866 * fep->rx_ring_size, fep->hwp + FEC_X_DES_START); 867 else 868 writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) 869 * fep->rx_ring_size, fep->hwp + FEC_X_DES_START); 870 871 872 for (i = 0; i <= TX_RING_MOD_MASK; i++) { 873 if (fep->tx_skbuff[i]) { 874 dev_kfree_skb_any(fep->tx_skbuff[i]); 875 fep->tx_skbuff[i] = NULL; 876 } 877 } 878 879 /* Enable MII mode */ 880 if (fep->full_duplex == DUPLEX_FULL) { 881 /* FD enable */ 882 writel(0x04, fep->hwp + FEC_X_CNTRL); 883 } else { 884 /* No Rcv on Xmit */ 885 rcntl |= 0x02; 886 writel(0x0, fep->hwp + FEC_X_CNTRL); 887 } 888 889 /* Set MII speed */ 890 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 891 892 #if !defined(CONFIG_M5272) 893 /* set RX checksum */ 894 val = readl(fep->hwp + FEC_RACC); 895 if (fep->csum_flags & FLAG_RX_CSUM_ENABLED) 896 val |= FEC_RACC_OPTIONS; 897 else 898 val &= ~FEC_RACC_OPTIONS; 899 writel(val, fep->hwp + FEC_RACC); 900 #endif 901 902 /* 903 * The phy interface and speed need to get configured 904 * differently on enet-mac. 905 */ 906 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { 907 /* Enable flow control and length check */ 908 rcntl |= 0x40000000 | 0x00000020; 909 910 /* RGMII, RMII or MII */ 911 if (fep->phy_interface == PHY_INTERFACE_MODE_RGMII) 912 rcntl |= (1 << 6); 913 else if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 914 rcntl |= (1 << 8); 915 else 916 rcntl &= ~(1 << 8); 917 918 /* 1G, 100M or 10M */ 919 if (fep->phy_dev) { 920 if (fep->phy_dev->speed == SPEED_1000) 921 ecntl |= (1 << 5); 922 else if (fep->phy_dev->speed == SPEED_100) 923 rcntl &= ~(1 << 9); 924 else 925 rcntl |= (1 << 9); 926 } 927 } else { 928 #ifdef FEC_MIIGSK_ENR 929 if (id_entry->driver_data & FEC_QUIRK_USE_GASKET) { 930 u32 cfgr; 931 /* disable the gasket and wait */ 932 writel(0, fep->hwp + FEC_MIIGSK_ENR); 933 while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) 934 udelay(1); 935 936 /* 937 * configure the gasket: 938 * RMII, 50 MHz, no loopback, no echo 939 * MII, 25 MHz, no loopback, no echo 940 */ 941 cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 942 ? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII; 943 if (fep->phy_dev && fep->phy_dev->speed == SPEED_10) 944 cfgr |= BM_MIIGSK_CFGR_FRCONT_10M; 945 writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR); 946 947 /* re-enable the gasket */ 948 writel(2, fep->hwp + FEC_MIIGSK_ENR); 949 } 950 #endif 951 } 952 953 #if !defined(CONFIG_M5272) 954 /* enable pause frame*/ 955 if ((fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) || 956 ((fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) && 957 fep->phy_dev && fep->phy_dev->pause)) { 958 rcntl |= FEC_ENET_FCE; 959 960 /* set FIFO threshold parameter to reduce overrun */ 961 writel(FEC_ENET_RSEM_V, fep->hwp + FEC_R_FIFO_RSEM); 962 writel(FEC_ENET_RSFL_V, fep->hwp + FEC_R_FIFO_RSFL); 963 writel(FEC_ENET_RAEM_V, fep->hwp + FEC_R_FIFO_RAEM); 964 writel(FEC_ENET_RAFL_V, fep->hwp + FEC_R_FIFO_RAFL); 965 966 /* OPD */ 967 writel(FEC_ENET_OPD_V, fep->hwp + FEC_OPD); 968 } else { 969 rcntl &= ~FEC_ENET_FCE; 970 } 971 #endif /* !defined(CONFIG_M5272) */ 972 973 writel(rcntl, fep->hwp + FEC_R_CNTRL); 974 975 /* Setup multicast filter. */ 976 set_multicast_list(ndev); 977 #ifndef CONFIG_M5272 978 writel(0, fep->hwp + FEC_HASH_TABLE_HIGH); 979 writel(0, fep->hwp + FEC_HASH_TABLE_LOW); 980 #endif 981 982 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { 983 /* enable ENET endian swap */ 984 ecntl |= (1 << 8); 985 /* enable ENET store and forward mode */ 986 writel(1 << 8, fep->hwp + FEC_X_WMRK); 987 } 988 989 if (fep->bufdesc_ex) 990 ecntl |= (1 << 4); 991 992 #ifndef CONFIG_M5272 993 /* Enable the MIB statistic event counters */ 994 writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT); 995 #endif 996 997 /* And last, enable the transmit and receive processing */ 998 writel(ecntl, fep->hwp + FEC_ECNTRL); 999 writel(0, fep->hwp + FEC_R_DES_ACTIVE); 1000 1001 if (fep->bufdesc_ex) 1002 fec_ptp_start_cyclecounter(ndev); 1003 1004 /* Enable interrupts we wish to service */ 1005 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1006 } 1007 1008 static void 1009 fec_stop(struct net_device *ndev) 1010 { 1011 struct fec_enet_private *fep = netdev_priv(ndev); 1012 const struct platform_device_id *id_entry = 1013 platform_get_device_id(fep->pdev); 1014 u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8); 1015 1016 /* We cannot expect a graceful transmit stop without link !!! */ 1017 if (fep->link) { 1018 writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */ 1019 udelay(10); 1020 if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA)) 1021 netdev_err(ndev, "Graceful transmit stop did not complete!\n"); 1022 } 1023 1024 /* Whack a reset. We should wait for this. */ 1025 writel(1, fep->hwp + FEC_ECNTRL); 1026 udelay(10); 1027 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 1028 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1029 1030 /* We have to keep ENET enabled to have MII interrupt stay working */ 1031 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { 1032 writel(2, fep->hwp + FEC_ECNTRL); 1033 writel(rmii_mode, fep->hwp + FEC_R_CNTRL); 1034 } 1035 } 1036 1037 1038 static void 1039 fec_timeout(struct net_device *ndev) 1040 { 1041 struct fec_enet_private *fep = netdev_priv(ndev); 1042 1043 fec_dump(ndev); 1044 1045 ndev->stats.tx_errors++; 1046 1047 schedule_work(&fep->tx_timeout_work); 1048 } 1049 1050 static void fec_enet_timeout_work(struct work_struct *work) 1051 { 1052 struct fec_enet_private *fep = 1053 container_of(work, struct fec_enet_private, tx_timeout_work); 1054 struct net_device *ndev = fep->netdev; 1055 1056 rtnl_lock(); 1057 if (netif_device_present(ndev) || netif_running(ndev)) { 1058 napi_disable(&fep->napi); 1059 netif_tx_lock_bh(ndev); 1060 fec_restart(ndev); 1061 netif_wake_queue(ndev); 1062 netif_tx_unlock_bh(ndev); 1063 napi_enable(&fep->napi); 1064 } 1065 rtnl_unlock(); 1066 } 1067 1068 static void 1069 fec_enet_hwtstamp(struct fec_enet_private *fep, unsigned ts, 1070 struct skb_shared_hwtstamps *hwtstamps) 1071 { 1072 unsigned long flags; 1073 u64 ns; 1074 1075 spin_lock_irqsave(&fep->tmreg_lock, flags); 1076 ns = timecounter_cyc2time(&fep->tc, ts); 1077 spin_unlock_irqrestore(&fep->tmreg_lock, flags); 1078 1079 memset(hwtstamps, 0, sizeof(*hwtstamps)); 1080 hwtstamps->hwtstamp = ns_to_ktime(ns); 1081 } 1082 1083 static void 1084 fec_enet_tx(struct net_device *ndev) 1085 { 1086 struct fec_enet_private *fep; 1087 struct bufdesc *bdp; 1088 unsigned short status; 1089 struct sk_buff *skb; 1090 int index = 0; 1091 int entries_free; 1092 1093 fep = netdev_priv(ndev); 1094 bdp = fep->dirty_tx; 1095 1096 /* get next bdp of dirty_tx */ 1097 bdp = fec_enet_get_nextdesc(bdp, fep); 1098 1099 while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) { 1100 1101 /* current queue is empty */ 1102 if (bdp == fep->cur_tx) 1103 break; 1104 1105 index = fec_enet_get_bd_index(fep->tx_bd_base, bdp, fep); 1106 1107 skb = fep->tx_skbuff[index]; 1108 fep->tx_skbuff[index] = NULL; 1109 if (!IS_TSO_HEADER(fep, bdp->cbd_bufaddr)) 1110 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 1111 bdp->cbd_datlen, DMA_TO_DEVICE); 1112 bdp->cbd_bufaddr = 0; 1113 if (!skb) { 1114 bdp = fec_enet_get_nextdesc(bdp, fep); 1115 continue; 1116 } 1117 1118 /* Check for errors. */ 1119 if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC | 1120 BD_ENET_TX_RL | BD_ENET_TX_UN | 1121 BD_ENET_TX_CSL)) { 1122 ndev->stats.tx_errors++; 1123 if (status & BD_ENET_TX_HB) /* No heartbeat */ 1124 ndev->stats.tx_heartbeat_errors++; 1125 if (status & BD_ENET_TX_LC) /* Late collision */ 1126 ndev->stats.tx_window_errors++; 1127 if (status & BD_ENET_TX_RL) /* Retrans limit */ 1128 ndev->stats.tx_aborted_errors++; 1129 if (status & BD_ENET_TX_UN) /* Underrun */ 1130 ndev->stats.tx_fifo_errors++; 1131 if (status & BD_ENET_TX_CSL) /* Carrier lost */ 1132 ndev->stats.tx_carrier_errors++; 1133 } else { 1134 ndev->stats.tx_packets++; 1135 ndev->stats.tx_bytes += skb->len; 1136 } 1137 1138 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) && 1139 fep->bufdesc_ex) { 1140 struct skb_shared_hwtstamps shhwtstamps; 1141 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1142 1143 fec_enet_hwtstamp(fep, ebdp->ts, &shhwtstamps); 1144 skb_tstamp_tx(skb, &shhwtstamps); 1145 } 1146 1147 /* Deferred means some collisions occurred during transmit, 1148 * but we eventually sent the packet OK. 1149 */ 1150 if (status & BD_ENET_TX_DEF) 1151 ndev->stats.collisions++; 1152 1153 /* Free the sk buffer associated with this last transmit */ 1154 dev_kfree_skb_any(skb); 1155 1156 fep->dirty_tx = bdp; 1157 1158 /* Update pointer to next buffer descriptor to be transmitted */ 1159 bdp = fec_enet_get_nextdesc(bdp, fep); 1160 1161 /* Since we have freed up a buffer, the ring is no longer full 1162 */ 1163 if (netif_queue_stopped(ndev)) { 1164 entries_free = fec_enet_get_free_txdesc_num(fep); 1165 if (entries_free >= fep->tx_wake_threshold) 1166 netif_wake_queue(ndev); 1167 } 1168 } 1169 1170 /* ERR006538: Keep the transmitter going */ 1171 if (bdp != fep->cur_tx && readl(fep->hwp + FEC_X_DES_ACTIVE) == 0) 1172 writel(0, fep->hwp + FEC_X_DES_ACTIVE); 1173 } 1174 1175 /* During a receive, the cur_rx points to the current incoming buffer. 1176 * When we update through the ring, if the next incoming buffer has 1177 * not been given to the system, we just set the empty indicator, 1178 * effectively tossing the packet. 1179 */ 1180 static int 1181 fec_enet_rx(struct net_device *ndev, int budget) 1182 { 1183 struct fec_enet_private *fep = netdev_priv(ndev); 1184 const struct platform_device_id *id_entry = 1185 platform_get_device_id(fep->pdev); 1186 struct bufdesc *bdp; 1187 unsigned short status; 1188 struct sk_buff *skb; 1189 ushort pkt_len; 1190 __u8 *data; 1191 int pkt_received = 0; 1192 struct bufdesc_ex *ebdp = NULL; 1193 bool vlan_packet_rcvd = false; 1194 u16 vlan_tag; 1195 int index = 0; 1196 1197 #ifdef CONFIG_M532x 1198 flush_cache_all(); 1199 #endif 1200 1201 /* First, grab all of the stats for the incoming packet. 1202 * These get messed up if we get called due to a busy condition. 1203 */ 1204 bdp = fep->cur_rx; 1205 1206 while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) { 1207 1208 if (pkt_received >= budget) 1209 break; 1210 pkt_received++; 1211 1212 /* Since we have allocated space to hold a complete frame, 1213 * the last indicator should be set. 1214 */ 1215 if ((status & BD_ENET_RX_LAST) == 0) 1216 netdev_err(ndev, "rcv is not +last\n"); 1217 1218 writel(FEC_ENET_RXF, fep->hwp + FEC_IEVENT); 1219 1220 /* Check for errors. */ 1221 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | 1222 BD_ENET_RX_CR | BD_ENET_RX_OV)) { 1223 ndev->stats.rx_errors++; 1224 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) { 1225 /* Frame too long or too short. */ 1226 ndev->stats.rx_length_errors++; 1227 } 1228 if (status & BD_ENET_RX_NO) /* Frame alignment */ 1229 ndev->stats.rx_frame_errors++; 1230 if (status & BD_ENET_RX_CR) /* CRC Error */ 1231 ndev->stats.rx_crc_errors++; 1232 if (status & BD_ENET_RX_OV) /* FIFO overrun */ 1233 ndev->stats.rx_fifo_errors++; 1234 } 1235 1236 /* Report late collisions as a frame error. 1237 * On this error, the BD is closed, but we don't know what we 1238 * have in the buffer. So, just drop this frame on the floor. 1239 */ 1240 if (status & BD_ENET_RX_CL) { 1241 ndev->stats.rx_errors++; 1242 ndev->stats.rx_frame_errors++; 1243 goto rx_processing_done; 1244 } 1245 1246 /* Process the incoming frame. */ 1247 ndev->stats.rx_packets++; 1248 pkt_len = bdp->cbd_datlen; 1249 ndev->stats.rx_bytes += pkt_len; 1250 1251 index = fec_enet_get_bd_index(fep->rx_bd_base, bdp, fep); 1252 data = fep->rx_skbuff[index]->data; 1253 dma_sync_single_for_cpu(&fep->pdev->dev, bdp->cbd_bufaddr, 1254 FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); 1255 1256 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) 1257 swap_buffer(data, pkt_len); 1258 1259 /* Extract the enhanced buffer descriptor */ 1260 ebdp = NULL; 1261 if (fep->bufdesc_ex) 1262 ebdp = (struct bufdesc_ex *)bdp; 1263 1264 /* If this is a VLAN packet remove the VLAN Tag */ 1265 vlan_packet_rcvd = false; 1266 if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) && 1267 fep->bufdesc_ex && (ebdp->cbd_esc & BD_ENET_RX_VLAN)) { 1268 /* Push and remove the vlan tag */ 1269 struct vlan_hdr *vlan_header = 1270 (struct vlan_hdr *) (data + ETH_HLEN); 1271 vlan_tag = ntohs(vlan_header->h_vlan_TCI); 1272 pkt_len -= VLAN_HLEN; 1273 1274 vlan_packet_rcvd = true; 1275 } 1276 1277 /* This does 16 byte alignment, exactly what we need. 1278 * The packet length includes FCS, but we don't want to 1279 * include that when passing upstream as it messes up 1280 * bridging applications. 1281 */ 1282 skb = netdev_alloc_skb(ndev, pkt_len - 4 + NET_IP_ALIGN); 1283 1284 if (unlikely(!skb)) { 1285 ndev->stats.rx_dropped++; 1286 } else { 1287 int payload_offset = (2 * ETH_ALEN); 1288 skb_reserve(skb, NET_IP_ALIGN); 1289 skb_put(skb, pkt_len - 4); /* Make room */ 1290 1291 /* Extract the frame data without the VLAN header. */ 1292 skb_copy_to_linear_data(skb, data, (2 * ETH_ALEN)); 1293 if (vlan_packet_rcvd) 1294 payload_offset = (2 * ETH_ALEN) + VLAN_HLEN; 1295 skb_copy_to_linear_data_offset(skb, (2 * ETH_ALEN), 1296 data + payload_offset, 1297 pkt_len - 4 - (2 * ETH_ALEN)); 1298 1299 skb->protocol = eth_type_trans(skb, ndev); 1300 1301 /* Get receive timestamp from the skb */ 1302 if (fep->hwts_rx_en && fep->bufdesc_ex) 1303 fec_enet_hwtstamp(fep, ebdp->ts, 1304 skb_hwtstamps(skb)); 1305 1306 if (fep->bufdesc_ex && 1307 (fep->csum_flags & FLAG_RX_CSUM_ENABLED)) { 1308 if (!(ebdp->cbd_esc & FLAG_RX_CSUM_ERROR)) { 1309 /* don't check it */ 1310 skb->ip_summed = CHECKSUM_UNNECESSARY; 1311 } else { 1312 skb_checksum_none_assert(skb); 1313 } 1314 } 1315 1316 /* Handle received VLAN packets */ 1317 if (vlan_packet_rcvd) 1318 __vlan_hwaccel_put_tag(skb, 1319 htons(ETH_P_8021Q), 1320 vlan_tag); 1321 1322 napi_gro_receive(&fep->napi, skb); 1323 } 1324 1325 dma_sync_single_for_device(&fep->pdev->dev, bdp->cbd_bufaddr, 1326 FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); 1327 rx_processing_done: 1328 /* Clear the status flags for this buffer */ 1329 status &= ~BD_ENET_RX_STATS; 1330 1331 /* Mark the buffer empty */ 1332 status |= BD_ENET_RX_EMPTY; 1333 bdp->cbd_sc = status; 1334 1335 if (fep->bufdesc_ex) { 1336 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1337 1338 ebdp->cbd_esc = BD_ENET_RX_INT; 1339 ebdp->cbd_prot = 0; 1340 ebdp->cbd_bdu = 0; 1341 } 1342 1343 /* Update BD pointer to next entry */ 1344 bdp = fec_enet_get_nextdesc(bdp, fep); 1345 1346 /* Doing this here will keep the FEC running while we process 1347 * incoming frames. On a heavily loaded network, we should be 1348 * able to keep up at the expense of system resources. 1349 */ 1350 writel(0, fep->hwp + FEC_R_DES_ACTIVE); 1351 } 1352 fep->cur_rx = bdp; 1353 1354 return pkt_received; 1355 } 1356 1357 static irqreturn_t 1358 fec_enet_interrupt(int irq, void *dev_id) 1359 { 1360 struct net_device *ndev = dev_id; 1361 struct fec_enet_private *fep = netdev_priv(ndev); 1362 const unsigned napi_mask = FEC_ENET_RXF | FEC_ENET_TXF; 1363 uint int_events; 1364 irqreturn_t ret = IRQ_NONE; 1365 1366 int_events = readl(fep->hwp + FEC_IEVENT); 1367 writel(int_events & ~napi_mask, fep->hwp + FEC_IEVENT); 1368 1369 if (int_events & napi_mask) { 1370 ret = IRQ_HANDLED; 1371 1372 /* Disable the NAPI interrupts */ 1373 writel(FEC_ENET_MII, fep->hwp + FEC_IMASK); 1374 napi_schedule(&fep->napi); 1375 } 1376 1377 if (int_events & FEC_ENET_MII) { 1378 ret = IRQ_HANDLED; 1379 complete(&fep->mdio_done); 1380 } 1381 1382 return ret; 1383 } 1384 1385 static int fec_enet_rx_napi(struct napi_struct *napi, int budget) 1386 { 1387 struct net_device *ndev = napi->dev; 1388 struct fec_enet_private *fep = netdev_priv(ndev); 1389 int pkts; 1390 1391 /* 1392 * Clear any pending transmit or receive interrupts before 1393 * processing the rings to avoid racing with the hardware. 1394 */ 1395 writel(FEC_ENET_RXF | FEC_ENET_TXF, fep->hwp + FEC_IEVENT); 1396 1397 pkts = fec_enet_rx(ndev, budget); 1398 1399 fec_enet_tx(ndev); 1400 1401 if (pkts < budget) { 1402 napi_complete(napi); 1403 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1404 } 1405 return pkts; 1406 } 1407 1408 /* ------------------------------------------------------------------------- */ 1409 static void fec_get_mac(struct net_device *ndev) 1410 { 1411 struct fec_enet_private *fep = netdev_priv(ndev); 1412 struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev); 1413 unsigned char *iap, tmpaddr[ETH_ALEN]; 1414 1415 /* 1416 * try to get mac address in following order: 1417 * 1418 * 1) module parameter via kernel command line in form 1419 * fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0 1420 */ 1421 iap = macaddr; 1422 1423 /* 1424 * 2) from device tree data 1425 */ 1426 if (!is_valid_ether_addr(iap)) { 1427 struct device_node *np = fep->pdev->dev.of_node; 1428 if (np) { 1429 const char *mac = of_get_mac_address(np); 1430 if (mac) 1431 iap = (unsigned char *) mac; 1432 } 1433 } 1434 1435 /* 1436 * 3) from flash or fuse (via platform data) 1437 */ 1438 if (!is_valid_ether_addr(iap)) { 1439 #ifdef CONFIG_M5272 1440 if (FEC_FLASHMAC) 1441 iap = (unsigned char *)FEC_FLASHMAC; 1442 #else 1443 if (pdata) 1444 iap = (unsigned char *)&pdata->mac; 1445 #endif 1446 } 1447 1448 /* 1449 * 4) FEC mac registers set by bootloader 1450 */ 1451 if (!is_valid_ether_addr(iap)) { 1452 *((__be32 *) &tmpaddr[0]) = 1453 cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW)); 1454 *((__be16 *) &tmpaddr[4]) = 1455 cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); 1456 iap = &tmpaddr[0]; 1457 } 1458 1459 /* 1460 * 5) random mac address 1461 */ 1462 if (!is_valid_ether_addr(iap)) { 1463 /* Report it and use a random ethernet address instead */ 1464 netdev_err(ndev, "Invalid MAC address: %pM\n", iap); 1465 eth_hw_addr_random(ndev); 1466 netdev_info(ndev, "Using random MAC address: %pM\n", 1467 ndev->dev_addr); 1468 return; 1469 } 1470 1471 memcpy(ndev->dev_addr, iap, ETH_ALEN); 1472 1473 /* Adjust MAC if using macaddr */ 1474 if (iap == macaddr) 1475 ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id; 1476 } 1477 1478 /* ------------------------------------------------------------------------- */ 1479 1480 /* 1481 * Phy section 1482 */ 1483 static void fec_enet_adjust_link(struct net_device *ndev) 1484 { 1485 struct fec_enet_private *fep = netdev_priv(ndev); 1486 struct phy_device *phy_dev = fep->phy_dev; 1487 int status_change = 0; 1488 1489 /* Prevent a state halted on mii error */ 1490 if (fep->mii_timeout && phy_dev->state == PHY_HALTED) { 1491 phy_dev->state = PHY_RESUMING; 1492 return; 1493 } 1494 1495 /* 1496 * If the netdev is down, or is going down, we're not interested 1497 * in link state events, so just mark our idea of the link as down 1498 * and ignore the event. 1499 */ 1500 if (!netif_running(ndev) || !netif_device_present(ndev)) { 1501 fep->link = 0; 1502 } else if (phy_dev->link) { 1503 if (!fep->link) { 1504 fep->link = phy_dev->link; 1505 status_change = 1; 1506 } 1507 1508 if (fep->full_duplex != phy_dev->duplex) { 1509 fep->full_duplex = phy_dev->duplex; 1510 status_change = 1; 1511 } 1512 1513 if (phy_dev->speed != fep->speed) { 1514 fep->speed = phy_dev->speed; 1515 status_change = 1; 1516 } 1517 1518 /* if any of the above changed restart the FEC */ 1519 if (status_change) { 1520 napi_disable(&fep->napi); 1521 netif_tx_lock_bh(ndev); 1522 fec_restart(ndev); 1523 netif_wake_queue(ndev); 1524 netif_tx_unlock_bh(ndev); 1525 napi_enable(&fep->napi); 1526 } 1527 } else { 1528 if (fep->link) { 1529 napi_disable(&fep->napi); 1530 netif_tx_lock_bh(ndev); 1531 fec_stop(ndev); 1532 netif_tx_unlock_bh(ndev); 1533 napi_enable(&fep->napi); 1534 fep->link = phy_dev->link; 1535 status_change = 1; 1536 } 1537 } 1538 1539 if (status_change) 1540 phy_print_status(phy_dev); 1541 } 1542 1543 static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum) 1544 { 1545 struct fec_enet_private *fep = bus->priv; 1546 unsigned long time_left; 1547 1548 fep->mii_timeout = 0; 1549 init_completion(&fep->mdio_done); 1550 1551 /* start a read op */ 1552 writel(FEC_MMFR_ST | FEC_MMFR_OP_READ | 1553 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | 1554 FEC_MMFR_TA, fep->hwp + FEC_MII_DATA); 1555 1556 /* wait for end of transfer */ 1557 time_left = wait_for_completion_timeout(&fep->mdio_done, 1558 usecs_to_jiffies(FEC_MII_TIMEOUT)); 1559 if (time_left == 0) { 1560 fep->mii_timeout = 1; 1561 netdev_err(fep->netdev, "MDIO read timeout\n"); 1562 return -ETIMEDOUT; 1563 } 1564 1565 /* return value */ 1566 return FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA)); 1567 } 1568 1569 static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum, 1570 u16 value) 1571 { 1572 struct fec_enet_private *fep = bus->priv; 1573 unsigned long time_left; 1574 1575 fep->mii_timeout = 0; 1576 init_completion(&fep->mdio_done); 1577 1578 /* start a write op */ 1579 writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE | 1580 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | 1581 FEC_MMFR_TA | FEC_MMFR_DATA(value), 1582 fep->hwp + FEC_MII_DATA); 1583 1584 /* wait for end of transfer */ 1585 time_left = wait_for_completion_timeout(&fep->mdio_done, 1586 usecs_to_jiffies(FEC_MII_TIMEOUT)); 1587 if (time_left == 0) { 1588 fep->mii_timeout = 1; 1589 netdev_err(fep->netdev, "MDIO write timeout\n"); 1590 return -ETIMEDOUT; 1591 } 1592 1593 return 0; 1594 } 1595 1596 static int fec_enet_clk_enable(struct net_device *ndev, bool enable) 1597 { 1598 struct fec_enet_private *fep = netdev_priv(ndev); 1599 int ret; 1600 1601 if (enable) { 1602 ret = clk_prepare_enable(fep->clk_ahb); 1603 if (ret) 1604 return ret; 1605 ret = clk_prepare_enable(fep->clk_ipg); 1606 if (ret) 1607 goto failed_clk_ipg; 1608 if (fep->clk_enet_out) { 1609 ret = clk_prepare_enable(fep->clk_enet_out); 1610 if (ret) 1611 goto failed_clk_enet_out; 1612 } 1613 if (fep->clk_ptp) { 1614 ret = clk_prepare_enable(fep->clk_ptp); 1615 if (ret) 1616 goto failed_clk_ptp; 1617 } 1618 } else { 1619 clk_disable_unprepare(fep->clk_ahb); 1620 clk_disable_unprepare(fep->clk_ipg); 1621 if (fep->clk_enet_out) 1622 clk_disable_unprepare(fep->clk_enet_out); 1623 if (fep->clk_ptp) 1624 clk_disable_unprepare(fep->clk_ptp); 1625 } 1626 1627 return 0; 1628 failed_clk_ptp: 1629 if (fep->clk_enet_out) 1630 clk_disable_unprepare(fep->clk_enet_out); 1631 failed_clk_enet_out: 1632 clk_disable_unprepare(fep->clk_ipg); 1633 failed_clk_ipg: 1634 clk_disable_unprepare(fep->clk_ahb); 1635 1636 return ret; 1637 } 1638 1639 static int fec_enet_mii_probe(struct net_device *ndev) 1640 { 1641 struct fec_enet_private *fep = netdev_priv(ndev); 1642 const struct platform_device_id *id_entry = 1643 platform_get_device_id(fep->pdev); 1644 struct phy_device *phy_dev = NULL; 1645 char mdio_bus_id[MII_BUS_ID_SIZE]; 1646 char phy_name[MII_BUS_ID_SIZE + 3]; 1647 int phy_id; 1648 int dev_id = fep->dev_id; 1649 1650 fep->phy_dev = NULL; 1651 1652 if (fep->phy_node) { 1653 phy_dev = of_phy_connect(ndev, fep->phy_node, 1654 &fec_enet_adjust_link, 0, 1655 fep->phy_interface); 1656 } else { 1657 /* check for attached phy */ 1658 for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) { 1659 if ((fep->mii_bus->phy_mask & (1 << phy_id))) 1660 continue; 1661 if (fep->mii_bus->phy_map[phy_id] == NULL) 1662 continue; 1663 if (fep->mii_bus->phy_map[phy_id]->phy_id == 0) 1664 continue; 1665 if (dev_id--) 1666 continue; 1667 strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE); 1668 break; 1669 } 1670 1671 if (phy_id >= PHY_MAX_ADDR) { 1672 netdev_info(ndev, "no PHY, assuming direct connection to switch\n"); 1673 strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); 1674 phy_id = 0; 1675 } 1676 1677 snprintf(phy_name, sizeof(phy_name), 1678 PHY_ID_FMT, mdio_bus_id, phy_id); 1679 phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 1680 fep->phy_interface); 1681 } 1682 1683 if (IS_ERR(phy_dev)) { 1684 netdev_err(ndev, "could not attach to PHY\n"); 1685 return PTR_ERR(phy_dev); 1686 } 1687 1688 /* mask with MAC supported features */ 1689 if (id_entry->driver_data & FEC_QUIRK_HAS_GBIT) { 1690 phy_dev->supported &= PHY_GBIT_FEATURES; 1691 phy_dev->supported &= ~SUPPORTED_1000baseT_Half; 1692 #if !defined(CONFIG_M5272) 1693 phy_dev->supported |= SUPPORTED_Pause; 1694 #endif 1695 } 1696 else 1697 phy_dev->supported &= PHY_BASIC_FEATURES; 1698 1699 phy_dev->advertising = phy_dev->supported; 1700 1701 fep->phy_dev = phy_dev; 1702 fep->link = 0; 1703 fep->full_duplex = 0; 1704 1705 netdev_info(ndev, "Freescale FEC PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", 1706 fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev), 1707 fep->phy_dev->irq); 1708 1709 return 0; 1710 } 1711 1712 static int fec_enet_mii_init(struct platform_device *pdev) 1713 { 1714 static struct mii_bus *fec0_mii_bus; 1715 struct net_device *ndev = platform_get_drvdata(pdev); 1716 struct fec_enet_private *fep = netdev_priv(ndev); 1717 const struct platform_device_id *id_entry = 1718 platform_get_device_id(fep->pdev); 1719 struct device_node *node; 1720 int err = -ENXIO, i; 1721 1722 /* 1723 * The dual fec interfaces are not equivalent with enet-mac. 1724 * Here are the differences: 1725 * 1726 * - fec0 supports MII & RMII modes while fec1 only supports RMII 1727 * - fec0 acts as the 1588 time master while fec1 is slave 1728 * - external phys can only be configured by fec0 1729 * 1730 * That is to say fec1 can not work independently. It only works 1731 * when fec0 is working. The reason behind this design is that the 1732 * second interface is added primarily for Switch mode. 1733 * 1734 * Because of the last point above, both phys are attached on fec0 1735 * mdio interface in board design, and need to be configured by 1736 * fec0 mii_bus. 1737 */ 1738 if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && fep->dev_id > 0) { 1739 /* fec1 uses fec0 mii_bus */ 1740 if (mii_cnt && fec0_mii_bus) { 1741 fep->mii_bus = fec0_mii_bus; 1742 mii_cnt++; 1743 return 0; 1744 } 1745 return -ENOENT; 1746 } 1747 1748 fep->mii_timeout = 0; 1749 1750 /* 1751 * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed) 1752 * 1753 * The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while 1754 * for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'. The i.MX28 1755 * Reference Manual has an error on this, and gets fixed on i.MX6Q 1756 * document. 1757 */ 1758 fep->phy_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000); 1759 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) 1760 fep->phy_speed--; 1761 fep->phy_speed <<= 1; 1762 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 1763 1764 fep->mii_bus = mdiobus_alloc(); 1765 if (fep->mii_bus == NULL) { 1766 err = -ENOMEM; 1767 goto err_out; 1768 } 1769 1770 fep->mii_bus->name = "fec_enet_mii_bus"; 1771 fep->mii_bus->read = fec_enet_mdio_read; 1772 fep->mii_bus->write = fec_enet_mdio_write; 1773 snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 1774 pdev->name, fep->dev_id + 1); 1775 fep->mii_bus->priv = fep; 1776 fep->mii_bus->parent = &pdev->dev; 1777 1778 fep->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); 1779 if (!fep->mii_bus->irq) { 1780 err = -ENOMEM; 1781 goto err_out_free_mdiobus; 1782 } 1783 1784 for (i = 0; i < PHY_MAX_ADDR; i++) 1785 fep->mii_bus->irq[i] = PHY_POLL; 1786 1787 node = of_get_child_by_name(pdev->dev.of_node, "mdio"); 1788 if (node) { 1789 err = of_mdiobus_register(fep->mii_bus, node); 1790 of_node_put(node); 1791 } else { 1792 err = mdiobus_register(fep->mii_bus); 1793 } 1794 1795 if (err) 1796 goto err_out_free_mdio_irq; 1797 1798 mii_cnt++; 1799 1800 /* save fec0 mii_bus */ 1801 if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) 1802 fec0_mii_bus = fep->mii_bus; 1803 1804 return 0; 1805 1806 err_out_free_mdio_irq: 1807 kfree(fep->mii_bus->irq); 1808 err_out_free_mdiobus: 1809 mdiobus_free(fep->mii_bus); 1810 err_out: 1811 return err; 1812 } 1813 1814 static void fec_enet_mii_remove(struct fec_enet_private *fep) 1815 { 1816 if (--mii_cnt == 0) { 1817 mdiobus_unregister(fep->mii_bus); 1818 kfree(fep->mii_bus->irq); 1819 mdiobus_free(fep->mii_bus); 1820 } 1821 } 1822 1823 static int fec_enet_get_settings(struct net_device *ndev, 1824 struct ethtool_cmd *cmd) 1825 { 1826 struct fec_enet_private *fep = netdev_priv(ndev); 1827 struct phy_device *phydev = fep->phy_dev; 1828 1829 if (!phydev) 1830 return -ENODEV; 1831 1832 return phy_ethtool_gset(phydev, cmd); 1833 } 1834 1835 static int fec_enet_set_settings(struct net_device *ndev, 1836 struct ethtool_cmd *cmd) 1837 { 1838 struct fec_enet_private *fep = netdev_priv(ndev); 1839 struct phy_device *phydev = fep->phy_dev; 1840 1841 if (!phydev) 1842 return -ENODEV; 1843 1844 return phy_ethtool_sset(phydev, cmd); 1845 } 1846 1847 static void fec_enet_get_drvinfo(struct net_device *ndev, 1848 struct ethtool_drvinfo *info) 1849 { 1850 struct fec_enet_private *fep = netdev_priv(ndev); 1851 1852 strlcpy(info->driver, fep->pdev->dev.driver->name, 1853 sizeof(info->driver)); 1854 strlcpy(info->version, "Revision: 1.0", sizeof(info->version)); 1855 strlcpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info)); 1856 } 1857 1858 static int fec_enet_get_ts_info(struct net_device *ndev, 1859 struct ethtool_ts_info *info) 1860 { 1861 struct fec_enet_private *fep = netdev_priv(ndev); 1862 1863 if (fep->bufdesc_ex) { 1864 1865 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | 1866 SOF_TIMESTAMPING_RX_SOFTWARE | 1867 SOF_TIMESTAMPING_SOFTWARE | 1868 SOF_TIMESTAMPING_TX_HARDWARE | 1869 SOF_TIMESTAMPING_RX_HARDWARE | 1870 SOF_TIMESTAMPING_RAW_HARDWARE; 1871 if (fep->ptp_clock) 1872 info->phc_index = ptp_clock_index(fep->ptp_clock); 1873 else 1874 info->phc_index = -1; 1875 1876 info->tx_types = (1 << HWTSTAMP_TX_OFF) | 1877 (1 << HWTSTAMP_TX_ON); 1878 1879 info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | 1880 (1 << HWTSTAMP_FILTER_ALL); 1881 return 0; 1882 } else { 1883 return ethtool_op_get_ts_info(ndev, info); 1884 } 1885 } 1886 1887 #if !defined(CONFIG_M5272) 1888 1889 static void fec_enet_get_pauseparam(struct net_device *ndev, 1890 struct ethtool_pauseparam *pause) 1891 { 1892 struct fec_enet_private *fep = netdev_priv(ndev); 1893 1894 pause->autoneg = (fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) != 0; 1895 pause->tx_pause = (fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) != 0; 1896 pause->rx_pause = pause->tx_pause; 1897 } 1898 1899 static int fec_enet_set_pauseparam(struct net_device *ndev, 1900 struct ethtool_pauseparam *pause) 1901 { 1902 struct fec_enet_private *fep = netdev_priv(ndev); 1903 1904 if (!fep->phy_dev) 1905 return -ENODEV; 1906 1907 if (pause->tx_pause != pause->rx_pause) { 1908 netdev_info(ndev, 1909 "hardware only support enable/disable both tx and rx"); 1910 return -EINVAL; 1911 } 1912 1913 fep->pause_flag = 0; 1914 1915 /* tx pause must be same as rx pause */ 1916 fep->pause_flag |= pause->rx_pause ? FEC_PAUSE_FLAG_ENABLE : 0; 1917 fep->pause_flag |= pause->autoneg ? FEC_PAUSE_FLAG_AUTONEG : 0; 1918 1919 if (pause->rx_pause || pause->autoneg) { 1920 fep->phy_dev->supported |= ADVERTISED_Pause; 1921 fep->phy_dev->advertising |= ADVERTISED_Pause; 1922 } else { 1923 fep->phy_dev->supported &= ~ADVERTISED_Pause; 1924 fep->phy_dev->advertising &= ~ADVERTISED_Pause; 1925 } 1926 1927 if (pause->autoneg) { 1928 if (netif_running(ndev)) 1929 fec_stop(ndev); 1930 phy_start_aneg(fep->phy_dev); 1931 } 1932 if (netif_running(ndev)) { 1933 napi_disable(&fep->napi); 1934 netif_tx_lock_bh(ndev); 1935 fec_restart(ndev); 1936 netif_wake_queue(ndev); 1937 netif_tx_unlock_bh(ndev); 1938 napi_enable(&fep->napi); 1939 } 1940 1941 return 0; 1942 } 1943 1944 static const struct fec_stat { 1945 char name[ETH_GSTRING_LEN]; 1946 u16 offset; 1947 } fec_stats[] = { 1948 /* RMON TX */ 1949 { "tx_dropped", RMON_T_DROP }, 1950 { "tx_packets", RMON_T_PACKETS }, 1951 { "tx_broadcast", RMON_T_BC_PKT }, 1952 { "tx_multicast", RMON_T_MC_PKT }, 1953 { "tx_crc_errors", RMON_T_CRC_ALIGN }, 1954 { "tx_undersize", RMON_T_UNDERSIZE }, 1955 { "tx_oversize", RMON_T_OVERSIZE }, 1956 { "tx_fragment", RMON_T_FRAG }, 1957 { "tx_jabber", RMON_T_JAB }, 1958 { "tx_collision", RMON_T_COL }, 1959 { "tx_64byte", RMON_T_P64 }, 1960 { "tx_65to127byte", RMON_T_P65TO127 }, 1961 { "tx_128to255byte", RMON_T_P128TO255 }, 1962 { "tx_256to511byte", RMON_T_P256TO511 }, 1963 { "tx_512to1023byte", RMON_T_P512TO1023 }, 1964 { "tx_1024to2047byte", RMON_T_P1024TO2047 }, 1965 { "tx_GTE2048byte", RMON_T_P_GTE2048 }, 1966 { "tx_octets", RMON_T_OCTETS }, 1967 1968 /* IEEE TX */ 1969 { "IEEE_tx_drop", IEEE_T_DROP }, 1970 { "IEEE_tx_frame_ok", IEEE_T_FRAME_OK }, 1971 { "IEEE_tx_1col", IEEE_T_1COL }, 1972 { "IEEE_tx_mcol", IEEE_T_MCOL }, 1973 { "IEEE_tx_def", IEEE_T_DEF }, 1974 { "IEEE_tx_lcol", IEEE_T_LCOL }, 1975 { "IEEE_tx_excol", IEEE_T_EXCOL }, 1976 { "IEEE_tx_macerr", IEEE_T_MACERR }, 1977 { "IEEE_tx_cserr", IEEE_T_CSERR }, 1978 { "IEEE_tx_sqe", IEEE_T_SQE }, 1979 { "IEEE_tx_fdxfc", IEEE_T_FDXFC }, 1980 { "IEEE_tx_octets_ok", IEEE_T_OCTETS_OK }, 1981 1982 /* RMON RX */ 1983 { "rx_packets", RMON_R_PACKETS }, 1984 { "rx_broadcast", RMON_R_BC_PKT }, 1985 { "rx_multicast", RMON_R_MC_PKT }, 1986 { "rx_crc_errors", RMON_R_CRC_ALIGN }, 1987 { "rx_undersize", RMON_R_UNDERSIZE }, 1988 { "rx_oversize", RMON_R_OVERSIZE }, 1989 { "rx_fragment", RMON_R_FRAG }, 1990 { "rx_jabber", RMON_R_JAB }, 1991 { "rx_64byte", RMON_R_P64 }, 1992 { "rx_65to127byte", RMON_R_P65TO127 }, 1993 { "rx_128to255byte", RMON_R_P128TO255 }, 1994 { "rx_256to511byte", RMON_R_P256TO511 }, 1995 { "rx_512to1023byte", RMON_R_P512TO1023 }, 1996 { "rx_1024to2047byte", RMON_R_P1024TO2047 }, 1997 { "rx_GTE2048byte", RMON_R_P_GTE2048 }, 1998 { "rx_octets", RMON_R_OCTETS }, 1999 2000 /* IEEE RX */ 2001 { "IEEE_rx_drop", IEEE_R_DROP }, 2002 { "IEEE_rx_frame_ok", IEEE_R_FRAME_OK }, 2003 { "IEEE_rx_crc", IEEE_R_CRC }, 2004 { "IEEE_rx_align", IEEE_R_ALIGN }, 2005 { "IEEE_rx_macerr", IEEE_R_MACERR }, 2006 { "IEEE_rx_fdxfc", IEEE_R_FDXFC }, 2007 { "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK }, 2008 }; 2009 2010 static void fec_enet_get_ethtool_stats(struct net_device *dev, 2011 struct ethtool_stats *stats, u64 *data) 2012 { 2013 struct fec_enet_private *fep = netdev_priv(dev); 2014 int i; 2015 2016 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 2017 data[i] = readl(fep->hwp + fec_stats[i].offset); 2018 } 2019 2020 static void fec_enet_get_strings(struct net_device *netdev, 2021 u32 stringset, u8 *data) 2022 { 2023 int i; 2024 switch (stringset) { 2025 case ETH_SS_STATS: 2026 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 2027 memcpy(data + i * ETH_GSTRING_LEN, 2028 fec_stats[i].name, ETH_GSTRING_LEN); 2029 break; 2030 } 2031 } 2032 2033 static int fec_enet_get_sset_count(struct net_device *dev, int sset) 2034 { 2035 switch (sset) { 2036 case ETH_SS_STATS: 2037 return ARRAY_SIZE(fec_stats); 2038 default: 2039 return -EOPNOTSUPP; 2040 } 2041 } 2042 #endif /* !defined(CONFIG_M5272) */ 2043 2044 static int fec_enet_nway_reset(struct net_device *dev) 2045 { 2046 struct fec_enet_private *fep = netdev_priv(dev); 2047 struct phy_device *phydev = fep->phy_dev; 2048 2049 if (!phydev) 2050 return -ENODEV; 2051 2052 return genphy_restart_aneg(phydev); 2053 } 2054 2055 static const struct ethtool_ops fec_enet_ethtool_ops = { 2056 .get_settings = fec_enet_get_settings, 2057 .set_settings = fec_enet_set_settings, 2058 .get_drvinfo = fec_enet_get_drvinfo, 2059 .nway_reset = fec_enet_nway_reset, 2060 .get_link = ethtool_op_get_link, 2061 #ifndef CONFIG_M5272 2062 .get_pauseparam = fec_enet_get_pauseparam, 2063 .set_pauseparam = fec_enet_set_pauseparam, 2064 .get_strings = fec_enet_get_strings, 2065 .get_ethtool_stats = fec_enet_get_ethtool_stats, 2066 .get_sset_count = fec_enet_get_sset_count, 2067 #endif 2068 .get_ts_info = fec_enet_get_ts_info, 2069 }; 2070 2071 static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) 2072 { 2073 struct fec_enet_private *fep = netdev_priv(ndev); 2074 struct phy_device *phydev = fep->phy_dev; 2075 2076 if (!netif_running(ndev)) 2077 return -EINVAL; 2078 2079 if (!phydev) 2080 return -ENODEV; 2081 2082 if (fep->bufdesc_ex) { 2083 if (cmd == SIOCSHWTSTAMP) 2084 return fec_ptp_set(ndev, rq); 2085 if (cmd == SIOCGHWTSTAMP) 2086 return fec_ptp_get(ndev, rq); 2087 } 2088 2089 return phy_mii_ioctl(phydev, rq, cmd); 2090 } 2091 2092 static void fec_enet_free_buffers(struct net_device *ndev) 2093 { 2094 struct fec_enet_private *fep = netdev_priv(ndev); 2095 unsigned int i; 2096 struct sk_buff *skb; 2097 struct bufdesc *bdp; 2098 2099 bdp = fep->rx_bd_base; 2100 for (i = 0; i < fep->rx_ring_size; i++) { 2101 skb = fep->rx_skbuff[i]; 2102 fep->rx_skbuff[i] = NULL; 2103 if (skb) { 2104 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 2105 FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); 2106 dev_kfree_skb(skb); 2107 } 2108 bdp = fec_enet_get_nextdesc(bdp, fep); 2109 } 2110 2111 bdp = fep->tx_bd_base; 2112 for (i = 0; i < fep->tx_ring_size; i++) { 2113 kfree(fep->tx_bounce[i]); 2114 fep->tx_bounce[i] = NULL; 2115 skb = fep->tx_skbuff[i]; 2116 fep->tx_skbuff[i] = NULL; 2117 dev_kfree_skb(skb); 2118 } 2119 } 2120 2121 static int fec_enet_alloc_buffers(struct net_device *ndev) 2122 { 2123 struct fec_enet_private *fep = netdev_priv(ndev); 2124 unsigned int i; 2125 struct sk_buff *skb; 2126 struct bufdesc *bdp; 2127 2128 bdp = fep->rx_bd_base; 2129 for (i = 0; i < fep->rx_ring_size; i++) { 2130 dma_addr_t addr; 2131 2132 skb = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE); 2133 if (!skb) 2134 goto err_alloc; 2135 2136 addr = dma_map_single(&fep->pdev->dev, skb->data, 2137 FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); 2138 if (dma_mapping_error(&fep->pdev->dev, addr)) { 2139 dev_kfree_skb(skb); 2140 if (net_ratelimit()) 2141 netdev_err(ndev, "Rx DMA memory map failed\n"); 2142 goto err_alloc; 2143 } 2144 2145 fep->rx_skbuff[i] = skb; 2146 bdp->cbd_bufaddr = addr; 2147 bdp->cbd_sc = BD_ENET_RX_EMPTY; 2148 2149 if (fep->bufdesc_ex) { 2150 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 2151 ebdp->cbd_esc = BD_ENET_RX_INT; 2152 } 2153 2154 bdp = fec_enet_get_nextdesc(bdp, fep); 2155 } 2156 2157 /* Set the last buffer to wrap. */ 2158 bdp = fec_enet_get_prevdesc(bdp, fep); 2159 bdp->cbd_sc |= BD_SC_WRAP; 2160 2161 bdp = fep->tx_bd_base; 2162 for (i = 0; i < fep->tx_ring_size; i++) { 2163 fep->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL); 2164 if (!fep->tx_bounce[i]) 2165 goto err_alloc; 2166 2167 bdp->cbd_sc = 0; 2168 bdp->cbd_bufaddr = 0; 2169 2170 if (fep->bufdesc_ex) { 2171 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 2172 ebdp->cbd_esc = BD_ENET_TX_INT; 2173 } 2174 2175 bdp = fec_enet_get_nextdesc(bdp, fep); 2176 } 2177 2178 /* Set the last buffer to wrap. */ 2179 bdp = fec_enet_get_prevdesc(bdp, fep); 2180 bdp->cbd_sc |= BD_SC_WRAP; 2181 2182 return 0; 2183 2184 err_alloc: 2185 fec_enet_free_buffers(ndev); 2186 return -ENOMEM; 2187 } 2188 2189 static int 2190 fec_enet_open(struct net_device *ndev) 2191 { 2192 struct fec_enet_private *fep = netdev_priv(ndev); 2193 int ret; 2194 2195 pinctrl_pm_select_default_state(&fep->pdev->dev); 2196 ret = fec_enet_clk_enable(ndev, true); 2197 if (ret) 2198 return ret; 2199 2200 /* I should reset the ring buffers here, but I don't yet know 2201 * a simple way to do that. 2202 */ 2203 2204 ret = fec_enet_alloc_buffers(ndev); 2205 if (ret) 2206 return ret; 2207 2208 /* Probe and connect to PHY when open the interface */ 2209 ret = fec_enet_mii_probe(ndev); 2210 if (ret) { 2211 fec_enet_free_buffers(ndev); 2212 return ret; 2213 } 2214 2215 fec_restart(ndev); 2216 napi_enable(&fep->napi); 2217 phy_start(fep->phy_dev); 2218 netif_start_queue(ndev); 2219 return 0; 2220 } 2221 2222 static int 2223 fec_enet_close(struct net_device *ndev) 2224 { 2225 struct fec_enet_private *fep = netdev_priv(ndev); 2226 2227 phy_stop(fep->phy_dev); 2228 2229 if (netif_device_present(ndev)) { 2230 napi_disable(&fep->napi); 2231 netif_tx_disable(ndev); 2232 fec_stop(ndev); 2233 } 2234 2235 phy_disconnect(fep->phy_dev); 2236 fep->phy_dev = NULL; 2237 2238 fec_enet_clk_enable(ndev, false); 2239 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 2240 fec_enet_free_buffers(ndev); 2241 2242 return 0; 2243 } 2244 2245 /* Set or clear the multicast filter for this adaptor. 2246 * Skeleton taken from sunlance driver. 2247 * The CPM Ethernet implementation allows Multicast as well as individual 2248 * MAC address filtering. Some of the drivers check to make sure it is 2249 * a group multicast address, and discard those that are not. I guess I 2250 * will do the same for now, but just remove the test if you want 2251 * individual filtering as well (do the upper net layers want or support 2252 * this kind of feature?). 2253 */ 2254 2255 #define HASH_BITS 6 /* #bits in hash */ 2256 #define CRC32_POLY 0xEDB88320 2257 2258 static void set_multicast_list(struct net_device *ndev) 2259 { 2260 struct fec_enet_private *fep = netdev_priv(ndev); 2261 struct netdev_hw_addr *ha; 2262 unsigned int i, bit, data, crc, tmp; 2263 unsigned char hash; 2264 2265 if (ndev->flags & IFF_PROMISC) { 2266 tmp = readl(fep->hwp + FEC_R_CNTRL); 2267 tmp |= 0x8; 2268 writel(tmp, fep->hwp + FEC_R_CNTRL); 2269 return; 2270 } 2271 2272 tmp = readl(fep->hwp + FEC_R_CNTRL); 2273 tmp &= ~0x8; 2274 writel(tmp, fep->hwp + FEC_R_CNTRL); 2275 2276 if (ndev->flags & IFF_ALLMULTI) { 2277 /* Catch all multicast addresses, so set the 2278 * filter to all 1's 2279 */ 2280 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2281 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2282 2283 return; 2284 } 2285 2286 /* Clear filter and add the addresses in hash register 2287 */ 2288 writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2289 writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2290 2291 netdev_for_each_mc_addr(ha, ndev) { 2292 /* calculate crc32 value of mac address */ 2293 crc = 0xffffffff; 2294 2295 for (i = 0; i < ndev->addr_len; i++) { 2296 data = ha->addr[i]; 2297 for (bit = 0; bit < 8; bit++, data >>= 1) { 2298 crc = (crc >> 1) ^ 2299 (((crc ^ data) & 1) ? CRC32_POLY : 0); 2300 } 2301 } 2302 2303 /* only upper 6 bits (HASH_BITS) are used 2304 * which point to specific bit in he hash registers 2305 */ 2306 hash = (crc >> (32 - HASH_BITS)) & 0x3f; 2307 2308 if (hash > 31) { 2309 tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2310 tmp |= 1 << (hash - 32); 2311 writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2312 } else { 2313 tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2314 tmp |= 1 << hash; 2315 writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2316 } 2317 } 2318 } 2319 2320 /* Set a MAC change in hardware. */ 2321 static int 2322 fec_set_mac_address(struct net_device *ndev, void *p) 2323 { 2324 struct fec_enet_private *fep = netdev_priv(ndev); 2325 struct sockaddr *addr = p; 2326 2327 if (addr) { 2328 if (!is_valid_ether_addr(addr->sa_data)) 2329 return -EADDRNOTAVAIL; 2330 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); 2331 } 2332 2333 writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) | 2334 (ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24), 2335 fep->hwp + FEC_ADDR_LOW); 2336 writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24), 2337 fep->hwp + FEC_ADDR_HIGH); 2338 return 0; 2339 } 2340 2341 #ifdef CONFIG_NET_POLL_CONTROLLER 2342 /** 2343 * fec_poll_controller - FEC Poll controller function 2344 * @dev: The FEC network adapter 2345 * 2346 * Polled functionality used by netconsole and others in non interrupt mode 2347 * 2348 */ 2349 static void fec_poll_controller(struct net_device *dev) 2350 { 2351 int i; 2352 struct fec_enet_private *fep = netdev_priv(dev); 2353 2354 for (i = 0; i < FEC_IRQ_NUM; i++) { 2355 if (fep->irq[i] > 0) { 2356 disable_irq(fep->irq[i]); 2357 fec_enet_interrupt(fep->irq[i], dev); 2358 enable_irq(fep->irq[i]); 2359 } 2360 } 2361 } 2362 #endif 2363 2364 #define FEATURES_NEED_QUIESCE NETIF_F_RXCSUM 2365 2366 static int fec_set_features(struct net_device *netdev, 2367 netdev_features_t features) 2368 { 2369 struct fec_enet_private *fep = netdev_priv(netdev); 2370 netdev_features_t changed = features ^ netdev->features; 2371 2372 /* Quiesce the device if necessary */ 2373 if (netif_running(netdev) && changed & FEATURES_NEED_QUIESCE) { 2374 napi_disable(&fep->napi); 2375 netif_tx_lock_bh(netdev); 2376 fec_stop(netdev); 2377 } 2378 2379 netdev->features = features; 2380 2381 /* Receive checksum has been changed */ 2382 if (changed & NETIF_F_RXCSUM) { 2383 if (features & NETIF_F_RXCSUM) 2384 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 2385 else 2386 fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED; 2387 } 2388 2389 /* Resume the device after updates */ 2390 if (netif_running(netdev) && changed & FEATURES_NEED_QUIESCE) { 2391 fec_restart(netdev); 2392 netif_wake_queue(netdev); 2393 netif_tx_unlock_bh(netdev); 2394 napi_enable(&fep->napi); 2395 } 2396 2397 return 0; 2398 } 2399 2400 static const struct net_device_ops fec_netdev_ops = { 2401 .ndo_open = fec_enet_open, 2402 .ndo_stop = fec_enet_close, 2403 .ndo_start_xmit = fec_enet_start_xmit, 2404 .ndo_set_rx_mode = set_multicast_list, 2405 .ndo_change_mtu = eth_change_mtu, 2406 .ndo_validate_addr = eth_validate_addr, 2407 .ndo_tx_timeout = fec_timeout, 2408 .ndo_set_mac_address = fec_set_mac_address, 2409 .ndo_do_ioctl = fec_enet_ioctl, 2410 #ifdef CONFIG_NET_POLL_CONTROLLER 2411 .ndo_poll_controller = fec_poll_controller, 2412 #endif 2413 .ndo_set_features = fec_set_features, 2414 }; 2415 2416 /* 2417 * XXX: We need to clean up on failure exits here. 2418 * 2419 */ 2420 static int fec_enet_init(struct net_device *ndev) 2421 { 2422 struct fec_enet_private *fep = netdev_priv(ndev); 2423 const struct platform_device_id *id_entry = 2424 platform_get_device_id(fep->pdev); 2425 struct bufdesc *cbd_base; 2426 int bd_size; 2427 2428 /* init the tx & rx ring size */ 2429 fep->tx_ring_size = TX_RING_SIZE; 2430 fep->rx_ring_size = RX_RING_SIZE; 2431 2432 fep->tx_stop_threshold = FEC_MAX_SKB_DESCS; 2433 fep->tx_wake_threshold = (fep->tx_ring_size - fep->tx_stop_threshold) / 2; 2434 2435 if (fep->bufdesc_ex) 2436 fep->bufdesc_size = sizeof(struct bufdesc_ex); 2437 else 2438 fep->bufdesc_size = sizeof(struct bufdesc); 2439 bd_size = (fep->tx_ring_size + fep->rx_ring_size) * 2440 fep->bufdesc_size; 2441 2442 /* Allocate memory for buffer descriptors. */ 2443 cbd_base = dma_alloc_coherent(NULL, bd_size, &fep->bd_dma, 2444 GFP_KERNEL); 2445 if (!cbd_base) 2446 return -ENOMEM; 2447 2448 fep->tso_hdrs = dma_alloc_coherent(NULL, fep->tx_ring_size * TSO_HEADER_SIZE, 2449 &fep->tso_hdrs_dma, GFP_KERNEL); 2450 if (!fep->tso_hdrs) { 2451 dma_free_coherent(NULL, bd_size, cbd_base, fep->bd_dma); 2452 return -ENOMEM; 2453 } 2454 2455 memset(cbd_base, 0, PAGE_SIZE); 2456 2457 fep->netdev = ndev; 2458 2459 /* Get the Ethernet address */ 2460 fec_get_mac(ndev); 2461 /* make sure MAC we just acquired is programmed into the hw */ 2462 fec_set_mac_address(ndev, NULL); 2463 2464 /* Set receive and transmit descriptor base. */ 2465 fep->rx_bd_base = cbd_base; 2466 if (fep->bufdesc_ex) 2467 fep->tx_bd_base = (struct bufdesc *) 2468 (((struct bufdesc_ex *)cbd_base) + fep->rx_ring_size); 2469 else 2470 fep->tx_bd_base = cbd_base + fep->rx_ring_size; 2471 2472 /* The FEC Ethernet specific entries in the device structure */ 2473 ndev->watchdog_timeo = TX_TIMEOUT; 2474 ndev->netdev_ops = &fec_netdev_ops; 2475 ndev->ethtool_ops = &fec_enet_ethtool_ops; 2476 2477 writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK); 2478 netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, NAPI_POLL_WEIGHT); 2479 2480 if (id_entry->driver_data & FEC_QUIRK_HAS_VLAN) 2481 /* enable hw VLAN support */ 2482 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; 2483 2484 if (id_entry->driver_data & FEC_QUIRK_HAS_CSUM) { 2485 ndev->gso_max_segs = FEC_MAX_TSO_SEGS; 2486 2487 /* enable hw accelerator */ 2488 ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM 2489 | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO); 2490 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 2491 } 2492 2493 ndev->hw_features = ndev->features; 2494 2495 fec_restart(ndev); 2496 2497 return 0; 2498 } 2499 2500 #ifdef CONFIG_OF 2501 static void fec_reset_phy(struct platform_device *pdev) 2502 { 2503 int err, phy_reset; 2504 int msec = 1; 2505 struct device_node *np = pdev->dev.of_node; 2506 2507 if (!np) 2508 return; 2509 2510 of_property_read_u32(np, "phy-reset-duration", &msec); 2511 /* A sane reset duration should not be longer than 1s */ 2512 if (msec > 1000) 2513 msec = 1; 2514 2515 phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0); 2516 if (!gpio_is_valid(phy_reset)) 2517 return; 2518 2519 err = devm_gpio_request_one(&pdev->dev, phy_reset, 2520 GPIOF_OUT_INIT_LOW, "phy-reset"); 2521 if (err) { 2522 dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err); 2523 return; 2524 } 2525 msleep(msec); 2526 gpio_set_value(phy_reset, 1); 2527 } 2528 #else /* CONFIG_OF */ 2529 static void fec_reset_phy(struct platform_device *pdev) 2530 { 2531 /* 2532 * In case of platform probe, the reset has been done 2533 * by machine code. 2534 */ 2535 } 2536 #endif /* CONFIG_OF */ 2537 2538 static int 2539 fec_probe(struct platform_device *pdev) 2540 { 2541 struct fec_enet_private *fep; 2542 struct fec_platform_data *pdata; 2543 struct net_device *ndev; 2544 int i, irq, ret = 0; 2545 struct resource *r; 2546 const struct of_device_id *of_id; 2547 static int dev_id; 2548 struct device_node *np = pdev->dev.of_node, *phy_node; 2549 2550 of_id = of_match_device(fec_dt_ids, &pdev->dev); 2551 if (of_id) 2552 pdev->id_entry = of_id->data; 2553 2554 /* Init network device */ 2555 ndev = alloc_etherdev(sizeof(struct fec_enet_private)); 2556 if (!ndev) 2557 return -ENOMEM; 2558 2559 SET_NETDEV_DEV(ndev, &pdev->dev); 2560 2561 /* setup board info structure */ 2562 fep = netdev_priv(ndev); 2563 2564 #if !defined(CONFIG_M5272) 2565 /* default enable pause frame auto negotiation */ 2566 if (pdev->id_entry && 2567 (pdev->id_entry->driver_data & FEC_QUIRK_HAS_GBIT)) 2568 fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG; 2569 #endif 2570 2571 /* Select default pin state */ 2572 pinctrl_pm_select_default_state(&pdev->dev); 2573 2574 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2575 fep->hwp = devm_ioremap_resource(&pdev->dev, r); 2576 if (IS_ERR(fep->hwp)) { 2577 ret = PTR_ERR(fep->hwp); 2578 goto failed_ioremap; 2579 } 2580 2581 fep->pdev = pdev; 2582 fep->dev_id = dev_id++; 2583 2584 fep->bufdesc_ex = 0; 2585 2586 platform_set_drvdata(pdev, ndev); 2587 2588 phy_node = of_parse_phandle(np, "phy-handle", 0); 2589 if (!phy_node && of_phy_is_fixed_link(np)) { 2590 ret = of_phy_register_fixed_link(np); 2591 if (ret < 0) { 2592 dev_err(&pdev->dev, 2593 "broken fixed-link specification\n"); 2594 goto failed_phy; 2595 } 2596 phy_node = of_node_get(np); 2597 } 2598 fep->phy_node = phy_node; 2599 2600 ret = of_get_phy_mode(pdev->dev.of_node); 2601 if (ret < 0) { 2602 pdata = dev_get_platdata(&pdev->dev); 2603 if (pdata) 2604 fep->phy_interface = pdata->phy; 2605 else 2606 fep->phy_interface = PHY_INTERFACE_MODE_MII; 2607 } else { 2608 fep->phy_interface = ret; 2609 } 2610 2611 fep->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 2612 if (IS_ERR(fep->clk_ipg)) { 2613 ret = PTR_ERR(fep->clk_ipg); 2614 goto failed_clk; 2615 } 2616 2617 fep->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); 2618 if (IS_ERR(fep->clk_ahb)) { 2619 ret = PTR_ERR(fep->clk_ahb); 2620 goto failed_clk; 2621 } 2622 2623 /* enet_out is optional, depends on board */ 2624 fep->clk_enet_out = devm_clk_get(&pdev->dev, "enet_out"); 2625 if (IS_ERR(fep->clk_enet_out)) 2626 fep->clk_enet_out = NULL; 2627 2628 fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp"); 2629 fep->bufdesc_ex = 2630 pdev->id_entry->driver_data & FEC_QUIRK_HAS_BUFDESC_EX; 2631 if (IS_ERR(fep->clk_ptp)) { 2632 fep->clk_ptp = NULL; 2633 fep->bufdesc_ex = 0; 2634 } 2635 2636 ret = fec_enet_clk_enable(ndev, true); 2637 if (ret) 2638 goto failed_clk; 2639 2640 fep->reg_phy = devm_regulator_get(&pdev->dev, "phy"); 2641 if (!IS_ERR(fep->reg_phy)) { 2642 ret = regulator_enable(fep->reg_phy); 2643 if (ret) { 2644 dev_err(&pdev->dev, 2645 "Failed to enable phy regulator: %d\n", ret); 2646 goto failed_regulator; 2647 } 2648 } else { 2649 fep->reg_phy = NULL; 2650 } 2651 2652 fec_reset_phy(pdev); 2653 2654 if (fep->bufdesc_ex) 2655 fec_ptp_init(pdev); 2656 2657 ret = fec_enet_init(ndev); 2658 if (ret) 2659 goto failed_init; 2660 2661 for (i = 0; i < FEC_IRQ_NUM; i++) { 2662 irq = platform_get_irq(pdev, i); 2663 if (irq < 0) { 2664 if (i) 2665 break; 2666 ret = irq; 2667 goto failed_irq; 2668 } 2669 ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt, 2670 0, pdev->name, ndev); 2671 if (ret) 2672 goto failed_irq; 2673 } 2674 2675 ret = fec_enet_mii_init(pdev); 2676 if (ret) 2677 goto failed_mii_init; 2678 2679 /* Carrier starts down, phylib will bring it up */ 2680 netif_carrier_off(ndev); 2681 fec_enet_clk_enable(ndev, false); 2682 pinctrl_pm_select_sleep_state(&pdev->dev); 2683 2684 ret = register_netdev(ndev); 2685 if (ret) 2686 goto failed_register; 2687 2688 if (fep->bufdesc_ex && fep->ptp_clock) 2689 netdev_info(ndev, "registered PHC device %d\n", fep->dev_id); 2690 2691 INIT_WORK(&fep->tx_timeout_work, fec_enet_timeout_work); 2692 return 0; 2693 2694 failed_register: 2695 fec_enet_mii_remove(fep); 2696 failed_mii_init: 2697 failed_irq: 2698 failed_init: 2699 if (fep->reg_phy) 2700 regulator_disable(fep->reg_phy); 2701 failed_regulator: 2702 fec_enet_clk_enable(ndev, false); 2703 failed_clk: 2704 failed_phy: 2705 of_node_put(phy_node); 2706 failed_ioremap: 2707 free_netdev(ndev); 2708 2709 return ret; 2710 } 2711 2712 static int 2713 fec_drv_remove(struct platform_device *pdev) 2714 { 2715 struct net_device *ndev = platform_get_drvdata(pdev); 2716 struct fec_enet_private *fep = netdev_priv(ndev); 2717 2718 cancel_work_sync(&fep->tx_timeout_work); 2719 unregister_netdev(ndev); 2720 fec_enet_mii_remove(fep); 2721 del_timer_sync(&fep->time_keep); 2722 if (fep->reg_phy) 2723 regulator_disable(fep->reg_phy); 2724 if (fep->ptp_clock) 2725 ptp_clock_unregister(fep->ptp_clock); 2726 fec_enet_clk_enable(ndev, false); 2727 of_node_put(fep->phy_node); 2728 free_netdev(ndev); 2729 2730 return 0; 2731 } 2732 2733 static int __maybe_unused fec_suspend(struct device *dev) 2734 { 2735 struct net_device *ndev = dev_get_drvdata(dev); 2736 struct fec_enet_private *fep = netdev_priv(ndev); 2737 2738 rtnl_lock(); 2739 if (netif_running(ndev)) { 2740 phy_stop(fep->phy_dev); 2741 napi_disable(&fep->napi); 2742 netif_tx_lock_bh(ndev); 2743 netif_device_detach(ndev); 2744 netif_tx_unlock_bh(ndev); 2745 fec_stop(ndev); 2746 } 2747 rtnl_unlock(); 2748 2749 fec_enet_clk_enable(ndev, false); 2750 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 2751 2752 if (fep->reg_phy) 2753 regulator_disable(fep->reg_phy); 2754 2755 return 0; 2756 } 2757 2758 static int __maybe_unused fec_resume(struct device *dev) 2759 { 2760 struct net_device *ndev = dev_get_drvdata(dev); 2761 struct fec_enet_private *fep = netdev_priv(ndev); 2762 int ret; 2763 2764 if (fep->reg_phy) { 2765 ret = regulator_enable(fep->reg_phy); 2766 if (ret) 2767 return ret; 2768 } 2769 2770 pinctrl_pm_select_default_state(&fep->pdev->dev); 2771 ret = fec_enet_clk_enable(ndev, true); 2772 if (ret) 2773 goto failed_clk; 2774 2775 rtnl_lock(); 2776 if (netif_running(ndev)) { 2777 fec_restart(ndev); 2778 netif_tx_lock_bh(ndev); 2779 netif_device_attach(ndev); 2780 netif_tx_unlock_bh(ndev); 2781 napi_enable(&fep->napi); 2782 phy_start(fep->phy_dev); 2783 } 2784 rtnl_unlock(); 2785 2786 return 0; 2787 2788 failed_clk: 2789 if (fep->reg_phy) 2790 regulator_disable(fep->reg_phy); 2791 return ret; 2792 } 2793 2794 static SIMPLE_DEV_PM_OPS(fec_pm_ops, fec_suspend, fec_resume); 2795 2796 static struct platform_driver fec_driver = { 2797 .driver = { 2798 .name = DRIVER_NAME, 2799 .owner = THIS_MODULE, 2800 .pm = &fec_pm_ops, 2801 .of_match_table = fec_dt_ids, 2802 }, 2803 .id_table = fec_devtype, 2804 .probe = fec_probe, 2805 .remove = fec_drv_remove, 2806 }; 2807 2808 module_platform_driver(fec_driver); 2809 2810 MODULE_ALIAS("platform:"DRIVER_NAME); 2811 MODULE_LICENSE("GPL"); 2812