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 #include <linux/prefetch.h> 61 62 #include <asm/cacheflush.h> 63 64 #include "fec.h" 65 66 static void set_multicast_list(struct net_device *ndev); 67 static void fec_enet_itr_coal_init(struct net_device *ndev); 68 69 #define DRIVER_NAME "fec" 70 71 #define FEC_ENET_GET_QUQUE(_x) ((_x == 0) ? 1 : ((_x == 1) ? 2 : 0)) 72 73 /* Pause frame feild and FIFO threshold */ 74 #define FEC_ENET_FCE (1 << 5) 75 #define FEC_ENET_RSEM_V 0x84 76 #define FEC_ENET_RSFL_V 16 77 #define FEC_ENET_RAEM_V 0x8 78 #define FEC_ENET_RAFL_V 0x8 79 #define FEC_ENET_OPD_V 0xFFF0 80 81 static struct platform_device_id fec_devtype[] = { 82 { 83 /* keep it for coldfire */ 84 .name = DRIVER_NAME, 85 .driver_data = 0, 86 }, { 87 .name = "imx25-fec", 88 .driver_data = FEC_QUIRK_USE_GASKET, 89 }, { 90 .name = "imx27-fec", 91 .driver_data = 0, 92 }, { 93 .name = "imx28-fec", 94 .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME | 95 FEC_QUIRK_SINGLE_MDIO, 96 }, { 97 .name = "imx6q-fec", 98 .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 99 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 100 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358, 101 }, { 102 .name = "mvf600-fec", 103 .driver_data = FEC_QUIRK_ENET_MAC, 104 }, { 105 .name = "imx6sx-fec", 106 .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 107 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 108 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB | 109 FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE, 110 }, { 111 /* sentinel */ 112 } 113 }; 114 MODULE_DEVICE_TABLE(platform, fec_devtype); 115 116 enum imx_fec_type { 117 IMX25_FEC = 1, /* runs on i.mx25/50/53 */ 118 IMX27_FEC, /* runs on i.mx27/35/51 */ 119 IMX28_FEC, 120 IMX6Q_FEC, 121 MVF600_FEC, 122 IMX6SX_FEC, 123 }; 124 125 static const struct of_device_id fec_dt_ids[] = { 126 { .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], }, 127 { .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], }, 128 { .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], }, 129 { .compatible = "fsl,imx6q-fec", .data = &fec_devtype[IMX6Q_FEC], }, 130 { .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], }, 131 { .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], }, 132 { /* sentinel */ } 133 }; 134 MODULE_DEVICE_TABLE(of, fec_dt_ids); 135 136 static unsigned char macaddr[ETH_ALEN]; 137 module_param_array(macaddr, byte, NULL, 0); 138 MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); 139 140 #if defined(CONFIG_M5272) 141 /* 142 * Some hardware gets it MAC address out of local flash memory. 143 * if this is non-zero then assume it is the address to get MAC from. 144 */ 145 #if defined(CONFIG_NETtel) 146 #define FEC_FLASHMAC 0xf0006006 147 #elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES) 148 #define FEC_FLASHMAC 0xf0006000 149 #elif defined(CONFIG_CANCam) 150 #define FEC_FLASHMAC 0xf0020000 151 #elif defined (CONFIG_M5272C3) 152 #define FEC_FLASHMAC (0xffe04000 + 4) 153 #elif defined(CONFIG_MOD5272) 154 #define FEC_FLASHMAC 0xffc0406b 155 #else 156 #define FEC_FLASHMAC 0 157 #endif 158 #endif /* CONFIG_M5272 */ 159 160 /* The FEC stores dest/src/type/vlan, data, and checksum for receive packets. 161 */ 162 #define PKT_MAXBUF_SIZE 1522 163 #define PKT_MINBUF_SIZE 64 164 #define PKT_MAXBLR_SIZE 1536 165 166 /* FEC receive acceleration */ 167 #define FEC_RACC_IPDIS (1 << 1) 168 #define FEC_RACC_PRODIS (1 << 2) 169 #define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS) 170 171 /* 172 * The 5270/5271/5280/5282/532x RX control register also contains maximum frame 173 * size bits. Other FEC hardware does not, so we need to take that into 174 * account when setting it. 175 */ 176 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ 177 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) 178 #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16) 179 #else 180 #define OPT_FRAME_SIZE 0 181 #endif 182 183 /* FEC MII MMFR bits definition */ 184 #define FEC_MMFR_ST (1 << 30) 185 #define FEC_MMFR_OP_READ (2 << 28) 186 #define FEC_MMFR_OP_WRITE (1 << 28) 187 #define FEC_MMFR_PA(v) ((v & 0x1f) << 23) 188 #define FEC_MMFR_RA(v) ((v & 0x1f) << 18) 189 #define FEC_MMFR_TA (2 << 16) 190 #define FEC_MMFR_DATA(v) (v & 0xffff) 191 /* FEC ECR bits definition */ 192 #define FEC_ECR_MAGICEN (1 << 2) 193 #define FEC_ECR_SLEEP (1 << 3) 194 195 #define FEC_MII_TIMEOUT 30000 /* us */ 196 197 /* Transmitter timeout */ 198 #define TX_TIMEOUT (2 * HZ) 199 200 #define FEC_PAUSE_FLAG_AUTONEG 0x1 201 #define FEC_PAUSE_FLAG_ENABLE 0x2 202 #define FEC_WOL_HAS_MAGIC_PACKET (0x1 << 0) 203 #define FEC_WOL_FLAG_ENABLE (0x1 << 1) 204 #define FEC_WOL_FLAG_SLEEP_ON (0x1 << 2) 205 206 #define COPYBREAK_DEFAULT 256 207 208 #define TSO_HEADER_SIZE 128 209 /* Max number of allowed TCP segments for software TSO */ 210 #define FEC_MAX_TSO_SEGS 100 211 #define FEC_MAX_SKB_DESCS (FEC_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 212 213 #define IS_TSO_HEADER(txq, addr) \ 214 ((addr >= txq->tso_hdrs_dma) && \ 215 (addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE)) 216 217 static int mii_cnt; 218 219 static inline 220 struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp, 221 struct fec_enet_private *fep, 222 int queue_id) 223 { 224 struct bufdesc *new_bd = bdp + 1; 225 struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp + 1; 226 struct fec_enet_priv_tx_q *txq = fep->tx_queue[queue_id]; 227 struct fec_enet_priv_rx_q *rxq = fep->rx_queue[queue_id]; 228 struct bufdesc_ex *ex_base; 229 struct bufdesc *base; 230 int ring_size; 231 232 if (bdp >= txq->tx_bd_base) { 233 base = txq->tx_bd_base; 234 ring_size = txq->tx_ring_size; 235 ex_base = (struct bufdesc_ex *)txq->tx_bd_base; 236 } else { 237 base = rxq->rx_bd_base; 238 ring_size = rxq->rx_ring_size; 239 ex_base = (struct bufdesc_ex *)rxq->rx_bd_base; 240 } 241 242 if (fep->bufdesc_ex) 243 return (struct bufdesc *)((ex_new_bd >= (ex_base + ring_size)) ? 244 ex_base : ex_new_bd); 245 else 246 return (new_bd >= (base + ring_size)) ? 247 base : new_bd; 248 } 249 250 static inline 251 struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp, 252 struct fec_enet_private *fep, 253 int queue_id) 254 { 255 struct bufdesc *new_bd = bdp - 1; 256 struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp - 1; 257 struct fec_enet_priv_tx_q *txq = fep->tx_queue[queue_id]; 258 struct fec_enet_priv_rx_q *rxq = fep->rx_queue[queue_id]; 259 struct bufdesc_ex *ex_base; 260 struct bufdesc *base; 261 int ring_size; 262 263 if (bdp >= txq->tx_bd_base) { 264 base = txq->tx_bd_base; 265 ring_size = txq->tx_ring_size; 266 ex_base = (struct bufdesc_ex *)txq->tx_bd_base; 267 } else { 268 base = rxq->rx_bd_base; 269 ring_size = rxq->rx_ring_size; 270 ex_base = (struct bufdesc_ex *)rxq->rx_bd_base; 271 } 272 273 if (fep->bufdesc_ex) 274 return (struct bufdesc *)((ex_new_bd < ex_base) ? 275 (ex_new_bd + ring_size) : ex_new_bd); 276 else 277 return (new_bd < base) ? (new_bd + ring_size) : new_bd; 278 } 279 280 static int fec_enet_get_bd_index(struct bufdesc *base, struct bufdesc *bdp, 281 struct fec_enet_private *fep) 282 { 283 return ((const char *)bdp - (const char *)base) / fep->bufdesc_size; 284 } 285 286 static int fec_enet_get_free_txdesc_num(struct fec_enet_private *fep, 287 struct fec_enet_priv_tx_q *txq) 288 { 289 int entries; 290 291 entries = ((const char *)txq->dirty_tx - 292 (const char *)txq->cur_tx) / fep->bufdesc_size - 1; 293 294 return entries > 0 ? entries : entries + txq->tx_ring_size; 295 } 296 297 static void swap_buffer(void *bufaddr, int len) 298 { 299 int i; 300 unsigned int *buf = bufaddr; 301 302 for (i = 0; i < len; i += 4, buf++) 303 swab32s(buf); 304 } 305 306 static void swap_buffer2(void *dst_buf, void *src_buf, int len) 307 { 308 int i; 309 unsigned int *src = src_buf; 310 unsigned int *dst = dst_buf; 311 312 for (i = 0; i < len; i += 4, src++, dst++) 313 *dst = swab32p(src); 314 } 315 316 static void fec_dump(struct net_device *ndev) 317 { 318 struct fec_enet_private *fep = netdev_priv(ndev); 319 struct bufdesc *bdp; 320 struct fec_enet_priv_tx_q *txq; 321 int index = 0; 322 323 netdev_info(ndev, "TX ring dump\n"); 324 pr_info("Nr SC addr len SKB\n"); 325 326 txq = fep->tx_queue[0]; 327 bdp = txq->tx_bd_base; 328 329 do { 330 pr_info("%3u %c%c 0x%04x 0x%08lx %4u %p\n", 331 index, 332 bdp == txq->cur_tx ? 'S' : ' ', 333 bdp == txq->dirty_tx ? 'H' : ' ', 334 bdp->cbd_sc, bdp->cbd_bufaddr, bdp->cbd_datlen, 335 txq->tx_skbuff[index]); 336 bdp = fec_enet_get_nextdesc(bdp, fep, 0); 337 index++; 338 } while (bdp != txq->tx_bd_base); 339 } 340 341 static inline bool is_ipv4_pkt(struct sk_buff *skb) 342 { 343 return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4; 344 } 345 346 static int 347 fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev) 348 { 349 /* Only run for packets requiring a checksum. */ 350 if (skb->ip_summed != CHECKSUM_PARTIAL) 351 return 0; 352 353 if (unlikely(skb_cow_head(skb, 0))) 354 return -1; 355 356 if (is_ipv4_pkt(skb)) 357 ip_hdr(skb)->check = 0; 358 *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0; 359 360 return 0; 361 } 362 363 static int 364 fec_enet_txq_submit_frag_skb(struct fec_enet_priv_tx_q *txq, 365 struct sk_buff *skb, 366 struct net_device *ndev) 367 { 368 struct fec_enet_private *fep = netdev_priv(ndev); 369 struct bufdesc *bdp = txq->cur_tx; 370 struct bufdesc_ex *ebdp; 371 int nr_frags = skb_shinfo(skb)->nr_frags; 372 unsigned short queue = skb_get_queue_mapping(skb); 373 int frag, frag_len; 374 unsigned short status; 375 unsigned int estatus = 0; 376 skb_frag_t *this_frag; 377 unsigned int index; 378 void *bufaddr; 379 dma_addr_t addr; 380 int i; 381 382 for (frag = 0; frag < nr_frags; frag++) { 383 this_frag = &skb_shinfo(skb)->frags[frag]; 384 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 385 ebdp = (struct bufdesc_ex *)bdp; 386 387 status = bdp->cbd_sc; 388 status &= ~BD_ENET_TX_STATS; 389 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 390 frag_len = skb_shinfo(skb)->frags[frag].size; 391 392 /* Handle the last BD specially */ 393 if (frag == nr_frags - 1) { 394 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 395 if (fep->bufdesc_ex) { 396 estatus |= BD_ENET_TX_INT; 397 if (unlikely(skb_shinfo(skb)->tx_flags & 398 SKBTX_HW_TSTAMP && fep->hwts_tx_en)) 399 estatus |= BD_ENET_TX_TS; 400 } 401 } 402 403 if (fep->bufdesc_ex) { 404 if (fep->quirks & FEC_QUIRK_HAS_AVB) 405 estatus |= FEC_TX_BD_FTYPE(queue); 406 if (skb->ip_summed == CHECKSUM_PARTIAL) 407 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 408 ebdp->cbd_bdu = 0; 409 ebdp->cbd_esc = estatus; 410 } 411 412 bufaddr = page_address(this_frag->page.p) + this_frag->page_offset; 413 414 index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep); 415 if (((unsigned long) bufaddr) & fep->tx_align || 416 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 417 memcpy(txq->tx_bounce[index], bufaddr, frag_len); 418 bufaddr = txq->tx_bounce[index]; 419 420 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 421 swap_buffer(bufaddr, frag_len); 422 } 423 424 addr = dma_map_single(&fep->pdev->dev, bufaddr, frag_len, 425 DMA_TO_DEVICE); 426 if (dma_mapping_error(&fep->pdev->dev, addr)) { 427 dev_kfree_skb_any(skb); 428 if (net_ratelimit()) 429 netdev_err(ndev, "Tx DMA memory map failed\n"); 430 goto dma_mapping_error; 431 } 432 433 bdp->cbd_bufaddr = addr; 434 bdp->cbd_datlen = frag_len; 435 bdp->cbd_sc = status; 436 } 437 438 txq->cur_tx = bdp; 439 440 return 0; 441 442 dma_mapping_error: 443 bdp = txq->cur_tx; 444 for (i = 0; i < frag; i++) { 445 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 446 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 447 bdp->cbd_datlen, DMA_TO_DEVICE); 448 } 449 return NETDEV_TX_OK; 450 } 451 452 static int fec_enet_txq_submit_skb(struct fec_enet_priv_tx_q *txq, 453 struct sk_buff *skb, struct net_device *ndev) 454 { 455 struct fec_enet_private *fep = netdev_priv(ndev); 456 int nr_frags = skb_shinfo(skb)->nr_frags; 457 struct bufdesc *bdp, *last_bdp; 458 void *bufaddr; 459 dma_addr_t addr; 460 unsigned short status; 461 unsigned short buflen; 462 unsigned short queue; 463 unsigned int estatus = 0; 464 unsigned int index; 465 int entries_free; 466 int ret; 467 468 entries_free = fec_enet_get_free_txdesc_num(fep, txq); 469 if (entries_free < MAX_SKB_FRAGS + 1) { 470 dev_kfree_skb_any(skb); 471 if (net_ratelimit()) 472 netdev_err(ndev, "NOT enough BD for SG!\n"); 473 return NETDEV_TX_OK; 474 } 475 476 /* Protocol checksum off-load for TCP and UDP. */ 477 if (fec_enet_clear_csum(skb, ndev)) { 478 dev_kfree_skb_any(skb); 479 return NETDEV_TX_OK; 480 } 481 482 /* Fill in a Tx ring entry */ 483 bdp = txq->cur_tx; 484 status = bdp->cbd_sc; 485 status &= ~BD_ENET_TX_STATS; 486 487 /* Set buffer length and buffer pointer */ 488 bufaddr = skb->data; 489 buflen = skb_headlen(skb); 490 491 queue = skb_get_queue_mapping(skb); 492 index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep); 493 if (((unsigned long) bufaddr) & fep->tx_align || 494 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 495 memcpy(txq->tx_bounce[index], skb->data, buflen); 496 bufaddr = txq->tx_bounce[index]; 497 498 if (fep->quirks & 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(txq, 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 (fep->quirks & FEC_QUIRK_HAS_AVB) 534 estatus |= FEC_TX_BD_FTYPE(queue); 535 536 if (skb->ip_summed == CHECKSUM_PARTIAL) 537 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 538 539 ebdp->cbd_bdu = 0; 540 ebdp->cbd_esc = estatus; 541 } 542 543 last_bdp = txq->cur_tx; 544 index = fec_enet_get_bd_index(txq->tx_bd_base, last_bdp, fep); 545 /* Save skb pointer */ 546 txq->tx_skbuff[index] = skb; 547 548 bdp->cbd_datlen = buflen; 549 bdp->cbd_bufaddr = addr; 550 551 /* Send it on its way. Tell FEC it's ready, interrupt when done, 552 * it's the last BD of the frame, and to put the CRC on the end. 553 */ 554 status |= (BD_ENET_TX_READY | BD_ENET_TX_TC); 555 bdp->cbd_sc = status; 556 557 /* If this was the last BD in the ring, start at the beginning again. */ 558 bdp = fec_enet_get_nextdesc(last_bdp, fep, queue); 559 560 skb_tx_timestamp(skb); 561 562 txq->cur_tx = bdp; 563 564 /* Trigger transmission start */ 565 writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue)); 566 567 return 0; 568 } 569 570 static int 571 fec_enet_txq_put_data_tso(struct fec_enet_priv_tx_q *txq, struct sk_buff *skb, 572 struct net_device *ndev, 573 struct bufdesc *bdp, int index, char *data, 574 int size, bool last_tcp, bool is_last) 575 { 576 struct fec_enet_private *fep = netdev_priv(ndev); 577 struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc); 578 unsigned short queue = skb_get_queue_mapping(skb); 579 unsigned short status; 580 unsigned int estatus = 0; 581 dma_addr_t addr; 582 583 status = bdp->cbd_sc; 584 status &= ~BD_ENET_TX_STATS; 585 586 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 587 588 if (((unsigned long) data) & fep->tx_align || 589 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 590 memcpy(txq->tx_bounce[index], data, size); 591 data = txq->tx_bounce[index]; 592 593 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 594 swap_buffer(data, size); 595 } 596 597 addr = dma_map_single(&fep->pdev->dev, data, size, DMA_TO_DEVICE); 598 if (dma_mapping_error(&fep->pdev->dev, addr)) { 599 dev_kfree_skb_any(skb); 600 if (net_ratelimit()) 601 netdev_err(ndev, "Tx DMA memory map failed\n"); 602 return NETDEV_TX_BUSY; 603 } 604 605 bdp->cbd_datlen = size; 606 bdp->cbd_bufaddr = addr; 607 608 if (fep->bufdesc_ex) { 609 if (fep->quirks & FEC_QUIRK_HAS_AVB) 610 estatus |= FEC_TX_BD_FTYPE(queue); 611 if (skb->ip_summed == CHECKSUM_PARTIAL) 612 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 613 ebdp->cbd_bdu = 0; 614 ebdp->cbd_esc = estatus; 615 } 616 617 /* Handle the last BD specially */ 618 if (last_tcp) 619 status |= (BD_ENET_TX_LAST | BD_ENET_TX_TC); 620 if (is_last) { 621 status |= BD_ENET_TX_INTR; 622 if (fep->bufdesc_ex) 623 ebdp->cbd_esc |= BD_ENET_TX_INT; 624 } 625 626 bdp->cbd_sc = status; 627 628 return 0; 629 } 630 631 static int 632 fec_enet_txq_put_hdr_tso(struct fec_enet_priv_tx_q *txq, 633 struct sk_buff *skb, struct net_device *ndev, 634 struct bufdesc *bdp, int index) 635 { 636 struct fec_enet_private *fep = netdev_priv(ndev); 637 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 638 struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc); 639 unsigned short queue = skb_get_queue_mapping(skb); 640 void *bufaddr; 641 unsigned long dmabuf; 642 unsigned short status; 643 unsigned int estatus = 0; 644 645 status = bdp->cbd_sc; 646 status &= ~BD_ENET_TX_STATS; 647 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 648 649 bufaddr = txq->tso_hdrs + index * TSO_HEADER_SIZE; 650 dmabuf = txq->tso_hdrs_dma + index * TSO_HEADER_SIZE; 651 if (((unsigned long)bufaddr) & fep->tx_align || 652 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 653 memcpy(txq->tx_bounce[index], skb->data, hdr_len); 654 bufaddr = txq->tx_bounce[index]; 655 656 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 657 swap_buffer(bufaddr, hdr_len); 658 659 dmabuf = dma_map_single(&fep->pdev->dev, bufaddr, 660 hdr_len, DMA_TO_DEVICE); 661 if (dma_mapping_error(&fep->pdev->dev, dmabuf)) { 662 dev_kfree_skb_any(skb); 663 if (net_ratelimit()) 664 netdev_err(ndev, "Tx DMA memory map failed\n"); 665 return NETDEV_TX_BUSY; 666 } 667 } 668 669 bdp->cbd_bufaddr = dmabuf; 670 bdp->cbd_datlen = hdr_len; 671 672 if (fep->bufdesc_ex) { 673 if (fep->quirks & FEC_QUIRK_HAS_AVB) 674 estatus |= FEC_TX_BD_FTYPE(queue); 675 if (skb->ip_summed == CHECKSUM_PARTIAL) 676 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 677 ebdp->cbd_bdu = 0; 678 ebdp->cbd_esc = estatus; 679 } 680 681 bdp->cbd_sc = status; 682 683 return 0; 684 } 685 686 static int fec_enet_txq_submit_tso(struct fec_enet_priv_tx_q *txq, 687 struct sk_buff *skb, 688 struct net_device *ndev) 689 { 690 struct fec_enet_private *fep = netdev_priv(ndev); 691 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 692 int total_len, data_left; 693 struct bufdesc *bdp = txq->cur_tx; 694 unsigned short queue = skb_get_queue_mapping(skb); 695 struct tso_t tso; 696 unsigned int index = 0; 697 int ret; 698 699 if (tso_count_descs(skb) >= fec_enet_get_free_txdesc_num(fep, txq)) { 700 dev_kfree_skb_any(skb); 701 if (net_ratelimit()) 702 netdev_err(ndev, "NOT enough BD for TSO!\n"); 703 return NETDEV_TX_OK; 704 } 705 706 /* Protocol checksum off-load for TCP and UDP. */ 707 if (fec_enet_clear_csum(skb, ndev)) { 708 dev_kfree_skb_any(skb); 709 return NETDEV_TX_OK; 710 } 711 712 /* Initialize the TSO handler, and prepare the first payload */ 713 tso_start(skb, &tso); 714 715 total_len = skb->len - hdr_len; 716 while (total_len > 0) { 717 char *hdr; 718 719 index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep); 720 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 721 total_len -= data_left; 722 723 /* prepare packet headers: MAC + IP + TCP */ 724 hdr = txq->tso_hdrs + index * TSO_HEADER_SIZE; 725 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 726 ret = fec_enet_txq_put_hdr_tso(txq, skb, ndev, bdp, index); 727 if (ret) 728 goto err_release; 729 730 while (data_left > 0) { 731 int size; 732 733 size = min_t(int, tso.size, data_left); 734 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 735 index = fec_enet_get_bd_index(txq->tx_bd_base, 736 bdp, fep); 737 ret = fec_enet_txq_put_data_tso(txq, skb, ndev, 738 bdp, index, 739 tso.data, size, 740 size == data_left, 741 total_len == 0); 742 if (ret) 743 goto err_release; 744 745 data_left -= size; 746 tso_build_data(skb, &tso, size); 747 } 748 749 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 750 } 751 752 /* Save skb pointer */ 753 txq->tx_skbuff[index] = skb; 754 755 skb_tx_timestamp(skb); 756 txq->cur_tx = bdp; 757 758 /* Trigger transmission start */ 759 if (!(fep->quirks & FEC_QUIRK_ERR007885) || 760 !readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) || 761 !readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) || 762 !readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) || 763 !readl(fep->hwp + FEC_X_DES_ACTIVE(queue))) 764 writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue)); 765 766 return 0; 767 768 err_release: 769 /* TODO: Release all used data descriptors for TSO */ 770 return ret; 771 } 772 773 static netdev_tx_t 774 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev) 775 { 776 struct fec_enet_private *fep = netdev_priv(ndev); 777 int entries_free; 778 unsigned short queue; 779 struct fec_enet_priv_tx_q *txq; 780 struct netdev_queue *nq; 781 int ret; 782 783 queue = skb_get_queue_mapping(skb); 784 txq = fep->tx_queue[queue]; 785 nq = netdev_get_tx_queue(ndev, queue); 786 787 if (skb_is_gso(skb)) 788 ret = fec_enet_txq_submit_tso(txq, skb, ndev); 789 else 790 ret = fec_enet_txq_submit_skb(txq, skb, ndev); 791 if (ret) 792 return ret; 793 794 entries_free = fec_enet_get_free_txdesc_num(fep, txq); 795 if (entries_free <= txq->tx_stop_threshold) 796 netif_tx_stop_queue(nq); 797 798 return NETDEV_TX_OK; 799 } 800 801 /* Init RX & TX buffer descriptors 802 */ 803 static void fec_enet_bd_init(struct net_device *dev) 804 { 805 struct fec_enet_private *fep = netdev_priv(dev); 806 struct fec_enet_priv_tx_q *txq; 807 struct fec_enet_priv_rx_q *rxq; 808 struct bufdesc *bdp; 809 unsigned int i; 810 unsigned int q; 811 812 for (q = 0; q < fep->num_rx_queues; q++) { 813 /* Initialize the receive buffer descriptors. */ 814 rxq = fep->rx_queue[q]; 815 bdp = rxq->rx_bd_base; 816 817 for (i = 0; i < rxq->rx_ring_size; i++) { 818 819 /* Initialize the BD for every fragment in the page. */ 820 if (bdp->cbd_bufaddr) 821 bdp->cbd_sc = BD_ENET_RX_EMPTY; 822 else 823 bdp->cbd_sc = 0; 824 bdp = fec_enet_get_nextdesc(bdp, fep, q); 825 } 826 827 /* Set the last buffer to wrap */ 828 bdp = fec_enet_get_prevdesc(bdp, fep, q); 829 bdp->cbd_sc |= BD_SC_WRAP; 830 831 rxq->cur_rx = rxq->rx_bd_base; 832 } 833 834 for (q = 0; q < fep->num_tx_queues; q++) { 835 /* ...and the same for transmit */ 836 txq = fep->tx_queue[q]; 837 bdp = txq->tx_bd_base; 838 txq->cur_tx = bdp; 839 840 for (i = 0; i < txq->tx_ring_size; i++) { 841 /* Initialize the BD for every fragment in the page. */ 842 bdp->cbd_sc = 0; 843 if (txq->tx_skbuff[i]) { 844 dev_kfree_skb_any(txq->tx_skbuff[i]); 845 txq->tx_skbuff[i] = NULL; 846 } 847 bdp->cbd_bufaddr = 0; 848 bdp = fec_enet_get_nextdesc(bdp, fep, q); 849 } 850 851 /* Set the last buffer to wrap */ 852 bdp = fec_enet_get_prevdesc(bdp, fep, q); 853 bdp->cbd_sc |= BD_SC_WRAP; 854 txq->dirty_tx = bdp; 855 } 856 } 857 858 static void fec_enet_active_rxring(struct net_device *ndev) 859 { 860 struct fec_enet_private *fep = netdev_priv(ndev); 861 int i; 862 863 for (i = 0; i < fep->num_rx_queues; i++) 864 writel(0, fep->hwp + FEC_R_DES_ACTIVE(i)); 865 } 866 867 static void fec_enet_enable_ring(struct net_device *ndev) 868 { 869 struct fec_enet_private *fep = netdev_priv(ndev); 870 struct fec_enet_priv_tx_q *txq; 871 struct fec_enet_priv_rx_q *rxq; 872 int i; 873 874 for (i = 0; i < fep->num_rx_queues; i++) { 875 rxq = fep->rx_queue[i]; 876 writel(rxq->bd_dma, fep->hwp + FEC_R_DES_START(i)); 877 writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE(i)); 878 879 /* enable DMA1/2 */ 880 if (i) 881 writel(RCMR_MATCHEN | RCMR_CMP(i), 882 fep->hwp + FEC_RCMR(i)); 883 } 884 885 for (i = 0; i < fep->num_tx_queues; i++) { 886 txq = fep->tx_queue[i]; 887 writel(txq->bd_dma, fep->hwp + FEC_X_DES_START(i)); 888 889 /* enable DMA1/2 */ 890 if (i) 891 writel(DMA_CLASS_EN | IDLE_SLOPE(i), 892 fep->hwp + FEC_DMA_CFG(i)); 893 } 894 } 895 896 static void fec_enet_reset_skb(struct net_device *ndev) 897 { 898 struct fec_enet_private *fep = netdev_priv(ndev); 899 struct fec_enet_priv_tx_q *txq; 900 int i, j; 901 902 for (i = 0; i < fep->num_tx_queues; i++) { 903 txq = fep->tx_queue[i]; 904 905 for (j = 0; j < txq->tx_ring_size; j++) { 906 if (txq->tx_skbuff[j]) { 907 dev_kfree_skb_any(txq->tx_skbuff[j]); 908 txq->tx_skbuff[j] = NULL; 909 } 910 } 911 } 912 } 913 914 /* 915 * This function is called to start or restart the FEC during a link 916 * change, transmit timeout, or to reconfigure the FEC. The network 917 * packet processing for this device must be stopped before this call. 918 */ 919 static void 920 fec_restart(struct net_device *ndev) 921 { 922 struct fec_enet_private *fep = netdev_priv(ndev); 923 u32 val; 924 u32 temp_mac[2]; 925 u32 rcntl = OPT_FRAME_SIZE | 0x04; 926 u32 ecntl = 0x2; /* ETHEREN */ 927 928 /* Whack a reset. We should wait for this. 929 * For i.MX6SX SOC, enet use AXI bus, we use disable MAC 930 * instead of reset MAC itself. 931 */ 932 if (fep->quirks & FEC_QUIRK_HAS_AVB) { 933 writel(0, fep->hwp + FEC_ECNTRL); 934 } else { 935 writel(1, fep->hwp + FEC_ECNTRL); 936 udelay(10); 937 } 938 939 /* 940 * enet-mac reset will reset mac address registers too, 941 * so need to reconfigure it. 942 */ 943 if (fep->quirks & FEC_QUIRK_ENET_MAC) { 944 memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN); 945 writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW); 946 writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH); 947 } 948 949 /* Clear any outstanding interrupt. */ 950 writel(0xffffffff, fep->hwp + FEC_IEVENT); 951 952 fec_enet_bd_init(ndev); 953 954 fec_enet_enable_ring(ndev); 955 956 /* Reset tx SKB buffers. */ 957 fec_enet_reset_skb(ndev); 958 959 /* Enable MII mode */ 960 if (fep->full_duplex == DUPLEX_FULL) { 961 /* FD enable */ 962 writel(0x04, fep->hwp + FEC_X_CNTRL); 963 } else { 964 /* No Rcv on Xmit */ 965 rcntl |= 0x02; 966 writel(0x0, fep->hwp + FEC_X_CNTRL); 967 } 968 969 /* Set MII speed */ 970 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 971 972 #if !defined(CONFIG_M5272) 973 /* set RX checksum */ 974 val = readl(fep->hwp + FEC_RACC); 975 if (fep->csum_flags & FLAG_RX_CSUM_ENABLED) 976 val |= FEC_RACC_OPTIONS; 977 else 978 val &= ~FEC_RACC_OPTIONS; 979 writel(val, fep->hwp + FEC_RACC); 980 #endif 981 982 /* 983 * The phy interface and speed need to get configured 984 * differently on enet-mac. 985 */ 986 if (fep->quirks & FEC_QUIRK_ENET_MAC) { 987 /* Enable flow control and length check */ 988 rcntl |= 0x40000000 | 0x00000020; 989 990 /* RGMII, RMII or MII */ 991 if (fep->phy_interface == PHY_INTERFACE_MODE_RGMII) 992 rcntl |= (1 << 6); 993 else if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 994 rcntl |= (1 << 8); 995 else 996 rcntl &= ~(1 << 8); 997 998 /* 1G, 100M or 10M */ 999 if (fep->phy_dev) { 1000 if (fep->phy_dev->speed == SPEED_1000) 1001 ecntl |= (1 << 5); 1002 else if (fep->phy_dev->speed == SPEED_100) 1003 rcntl &= ~(1 << 9); 1004 else 1005 rcntl |= (1 << 9); 1006 } 1007 } else { 1008 #ifdef FEC_MIIGSK_ENR 1009 if (fep->quirks & FEC_QUIRK_USE_GASKET) { 1010 u32 cfgr; 1011 /* disable the gasket and wait */ 1012 writel(0, fep->hwp + FEC_MIIGSK_ENR); 1013 while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) 1014 udelay(1); 1015 1016 /* 1017 * configure the gasket: 1018 * RMII, 50 MHz, no loopback, no echo 1019 * MII, 25 MHz, no loopback, no echo 1020 */ 1021 cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 1022 ? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII; 1023 if (fep->phy_dev && fep->phy_dev->speed == SPEED_10) 1024 cfgr |= BM_MIIGSK_CFGR_FRCONT_10M; 1025 writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR); 1026 1027 /* re-enable the gasket */ 1028 writel(2, fep->hwp + FEC_MIIGSK_ENR); 1029 } 1030 #endif 1031 } 1032 1033 #if !defined(CONFIG_M5272) 1034 /* enable pause frame*/ 1035 if ((fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) || 1036 ((fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) && 1037 fep->phy_dev && fep->phy_dev->pause)) { 1038 rcntl |= FEC_ENET_FCE; 1039 1040 /* set FIFO threshold parameter to reduce overrun */ 1041 writel(FEC_ENET_RSEM_V, fep->hwp + FEC_R_FIFO_RSEM); 1042 writel(FEC_ENET_RSFL_V, fep->hwp + FEC_R_FIFO_RSFL); 1043 writel(FEC_ENET_RAEM_V, fep->hwp + FEC_R_FIFO_RAEM); 1044 writel(FEC_ENET_RAFL_V, fep->hwp + FEC_R_FIFO_RAFL); 1045 1046 /* OPD */ 1047 writel(FEC_ENET_OPD_V, fep->hwp + FEC_OPD); 1048 } else { 1049 rcntl &= ~FEC_ENET_FCE; 1050 } 1051 #endif /* !defined(CONFIG_M5272) */ 1052 1053 writel(rcntl, fep->hwp + FEC_R_CNTRL); 1054 1055 /* Setup multicast filter. */ 1056 set_multicast_list(ndev); 1057 #ifndef CONFIG_M5272 1058 writel(0, fep->hwp + FEC_HASH_TABLE_HIGH); 1059 writel(0, fep->hwp + FEC_HASH_TABLE_LOW); 1060 #endif 1061 1062 if (fep->quirks & FEC_QUIRK_ENET_MAC) { 1063 /* enable ENET endian swap */ 1064 ecntl |= (1 << 8); 1065 /* enable ENET store and forward mode */ 1066 writel(1 << 8, fep->hwp + FEC_X_WMRK); 1067 } 1068 1069 if (fep->bufdesc_ex) 1070 ecntl |= (1 << 4); 1071 1072 #ifndef CONFIG_M5272 1073 /* Enable the MIB statistic event counters */ 1074 writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT); 1075 #endif 1076 1077 /* And last, enable the transmit and receive processing */ 1078 writel(ecntl, fep->hwp + FEC_ECNTRL); 1079 fec_enet_active_rxring(ndev); 1080 1081 if (fep->bufdesc_ex) 1082 fec_ptp_start_cyclecounter(ndev); 1083 1084 /* Enable interrupts we wish to service */ 1085 if (fep->link) 1086 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1087 else 1088 writel(FEC_ENET_MII, fep->hwp + FEC_IMASK); 1089 1090 /* Init the interrupt coalescing */ 1091 fec_enet_itr_coal_init(ndev); 1092 1093 } 1094 1095 static void 1096 fec_stop(struct net_device *ndev) 1097 { 1098 struct fec_enet_private *fep = netdev_priv(ndev); 1099 struct fec_platform_data *pdata = fep->pdev->dev.platform_data; 1100 u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8); 1101 u32 val; 1102 1103 /* We cannot expect a graceful transmit stop without link !!! */ 1104 if (fep->link) { 1105 writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */ 1106 udelay(10); 1107 if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA)) 1108 netdev_err(ndev, "Graceful transmit stop did not complete!\n"); 1109 } 1110 1111 /* Whack a reset. We should wait for this. 1112 * For i.MX6SX SOC, enet use AXI bus, we use disable MAC 1113 * instead of reset MAC itself. 1114 */ 1115 if (!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) { 1116 if (fep->quirks & FEC_QUIRK_HAS_AVB) { 1117 writel(0, fep->hwp + FEC_ECNTRL); 1118 } else { 1119 writel(1, fep->hwp + FEC_ECNTRL); 1120 udelay(10); 1121 } 1122 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1123 } else { 1124 writel(FEC_DEFAULT_IMASK | FEC_ENET_WAKEUP, fep->hwp + FEC_IMASK); 1125 val = readl(fep->hwp + FEC_ECNTRL); 1126 val |= (FEC_ECR_MAGICEN | FEC_ECR_SLEEP); 1127 writel(val, fep->hwp + FEC_ECNTRL); 1128 1129 if (pdata && pdata->sleep_mode_enable) 1130 pdata->sleep_mode_enable(true); 1131 } 1132 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 1133 1134 /* We have to keep ENET enabled to have MII interrupt stay working */ 1135 if (fep->quirks & FEC_QUIRK_ENET_MAC && 1136 !(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) { 1137 writel(2, fep->hwp + FEC_ECNTRL); 1138 writel(rmii_mode, fep->hwp + FEC_R_CNTRL); 1139 } 1140 } 1141 1142 1143 static void 1144 fec_timeout(struct net_device *ndev) 1145 { 1146 struct fec_enet_private *fep = netdev_priv(ndev); 1147 1148 fec_dump(ndev); 1149 1150 ndev->stats.tx_errors++; 1151 1152 schedule_work(&fep->tx_timeout_work); 1153 } 1154 1155 static void fec_enet_timeout_work(struct work_struct *work) 1156 { 1157 struct fec_enet_private *fep = 1158 container_of(work, struct fec_enet_private, tx_timeout_work); 1159 struct net_device *ndev = fep->netdev; 1160 1161 rtnl_lock(); 1162 if (netif_device_present(ndev) || netif_running(ndev)) { 1163 napi_disable(&fep->napi); 1164 netif_tx_lock_bh(ndev); 1165 fec_restart(ndev); 1166 netif_wake_queue(ndev); 1167 netif_tx_unlock_bh(ndev); 1168 napi_enable(&fep->napi); 1169 } 1170 rtnl_unlock(); 1171 } 1172 1173 static void 1174 fec_enet_hwtstamp(struct fec_enet_private *fep, unsigned ts, 1175 struct skb_shared_hwtstamps *hwtstamps) 1176 { 1177 unsigned long flags; 1178 u64 ns; 1179 1180 spin_lock_irqsave(&fep->tmreg_lock, flags); 1181 ns = timecounter_cyc2time(&fep->tc, ts); 1182 spin_unlock_irqrestore(&fep->tmreg_lock, flags); 1183 1184 memset(hwtstamps, 0, sizeof(*hwtstamps)); 1185 hwtstamps->hwtstamp = ns_to_ktime(ns); 1186 } 1187 1188 static void 1189 fec_enet_tx_queue(struct net_device *ndev, u16 queue_id) 1190 { 1191 struct fec_enet_private *fep; 1192 struct bufdesc *bdp; 1193 unsigned short status; 1194 struct sk_buff *skb; 1195 struct fec_enet_priv_tx_q *txq; 1196 struct netdev_queue *nq; 1197 int index = 0; 1198 int entries_free; 1199 1200 fep = netdev_priv(ndev); 1201 1202 queue_id = FEC_ENET_GET_QUQUE(queue_id); 1203 1204 txq = fep->tx_queue[queue_id]; 1205 /* get next bdp of dirty_tx */ 1206 nq = netdev_get_tx_queue(ndev, queue_id); 1207 bdp = txq->dirty_tx; 1208 1209 /* get next bdp of dirty_tx */ 1210 bdp = fec_enet_get_nextdesc(bdp, fep, queue_id); 1211 1212 while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) { 1213 1214 /* current queue is empty */ 1215 if (bdp == txq->cur_tx) 1216 break; 1217 1218 index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep); 1219 1220 skb = txq->tx_skbuff[index]; 1221 txq->tx_skbuff[index] = NULL; 1222 if (!IS_TSO_HEADER(txq, bdp->cbd_bufaddr)) 1223 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 1224 bdp->cbd_datlen, DMA_TO_DEVICE); 1225 bdp->cbd_bufaddr = 0; 1226 if (!skb) { 1227 bdp = fec_enet_get_nextdesc(bdp, fep, queue_id); 1228 continue; 1229 } 1230 1231 /* Check for errors. */ 1232 if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC | 1233 BD_ENET_TX_RL | BD_ENET_TX_UN | 1234 BD_ENET_TX_CSL)) { 1235 ndev->stats.tx_errors++; 1236 if (status & BD_ENET_TX_HB) /* No heartbeat */ 1237 ndev->stats.tx_heartbeat_errors++; 1238 if (status & BD_ENET_TX_LC) /* Late collision */ 1239 ndev->stats.tx_window_errors++; 1240 if (status & BD_ENET_TX_RL) /* Retrans limit */ 1241 ndev->stats.tx_aborted_errors++; 1242 if (status & BD_ENET_TX_UN) /* Underrun */ 1243 ndev->stats.tx_fifo_errors++; 1244 if (status & BD_ENET_TX_CSL) /* Carrier lost */ 1245 ndev->stats.tx_carrier_errors++; 1246 } else { 1247 ndev->stats.tx_packets++; 1248 ndev->stats.tx_bytes += skb->len; 1249 } 1250 1251 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) && 1252 fep->bufdesc_ex) { 1253 struct skb_shared_hwtstamps shhwtstamps; 1254 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1255 1256 fec_enet_hwtstamp(fep, ebdp->ts, &shhwtstamps); 1257 skb_tstamp_tx(skb, &shhwtstamps); 1258 } 1259 1260 /* Deferred means some collisions occurred during transmit, 1261 * but we eventually sent the packet OK. 1262 */ 1263 if (status & BD_ENET_TX_DEF) 1264 ndev->stats.collisions++; 1265 1266 /* Free the sk buffer associated with this last transmit */ 1267 dev_kfree_skb_any(skb); 1268 1269 txq->dirty_tx = bdp; 1270 1271 /* Update pointer to next buffer descriptor to be transmitted */ 1272 bdp = fec_enet_get_nextdesc(bdp, fep, queue_id); 1273 1274 /* Since we have freed up a buffer, the ring is no longer full 1275 */ 1276 if (netif_queue_stopped(ndev)) { 1277 entries_free = fec_enet_get_free_txdesc_num(fep, txq); 1278 if (entries_free >= txq->tx_wake_threshold) 1279 netif_tx_wake_queue(nq); 1280 } 1281 } 1282 1283 /* ERR006538: Keep the transmitter going */ 1284 if (bdp != txq->cur_tx && 1285 readl(fep->hwp + FEC_X_DES_ACTIVE(queue_id)) == 0) 1286 writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue_id)); 1287 } 1288 1289 static void 1290 fec_enet_tx(struct net_device *ndev) 1291 { 1292 struct fec_enet_private *fep = netdev_priv(ndev); 1293 u16 queue_id; 1294 /* First process class A queue, then Class B and Best Effort queue */ 1295 for_each_set_bit(queue_id, &fep->work_tx, FEC_ENET_MAX_TX_QS) { 1296 clear_bit(queue_id, &fep->work_tx); 1297 fec_enet_tx_queue(ndev, queue_id); 1298 } 1299 return; 1300 } 1301 1302 static int 1303 fec_enet_new_rxbdp(struct net_device *ndev, struct bufdesc *bdp, struct sk_buff *skb) 1304 { 1305 struct fec_enet_private *fep = netdev_priv(ndev); 1306 int off; 1307 1308 off = ((unsigned long)skb->data) & fep->rx_align; 1309 if (off) 1310 skb_reserve(skb, fep->rx_align + 1 - off); 1311 1312 bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data, 1313 FEC_ENET_RX_FRSIZE - fep->rx_align, 1314 DMA_FROM_DEVICE); 1315 if (dma_mapping_error(&fep->pdev->dev, bdp->cbd_bufaddr)) { 1316 if (net_ratelimit()) 1317 netdev_err(ndev, "Rx DMA memory map failed\n"); 1318 return -ENOMEM; 1319 } 1320 1321 return 0; 1322 } 1323 1324 static bool fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb, 1325 struct bufdesc *bdp, u32 length, bool swap) 1326 { 1327 struct fec_enet_private *fep = netdev_priv(ndev); 1328 struct sk_buff *new_skb; 1329 1330 if (length > fep->rx_copybreak) 1331 return false; 1332 1333 new_skb = netdev_alloc_skb(ndev, length); 1334 if (!new_skb) 1335 return false; 1336 1337 dma_sync_single_for_cpu(&fep->pdev->dev, bdp->cbd_bufaddr, 1338 FEC_ENET_RX_FRSIZE - fep->rx_align, 1339 DMA_FROM_DEVICE); 1340 if (!swap) 1341 memcpy(new_skb->data, (*skb)->data, length); 1342 else 1343 swap_buffer2(new_skb->data, (*skb)->data, length); 1344 *skb = new_skb; 1345 1346 return true; 1347 } 1348 1349 /* During a receive, the cur_rx points to the current incoming buffer. 1350 * When we update through the ring, if the next incoming buffer has 1351 * not been given to the system, we just set the empty indicator, 1352 * effectively tossing the packet. 1353 */ 1354 static int 1355 fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id) 1356 { 1357 struct fec_enet_private *fep = netdev_priv(ndev); 1358 struct fec_enet_priv_rx_q *rxq; 1359 struct bufdesc *bdp; 1360 unsigned short status; 1361 struct sk_buff *skb_new = NULL; 1362 struct sk_buff *skb; 1363 ushort pkt_len; 1364 __u8 *data; 1365 int pkt_received = 0; 1366 struct bufdesc_ex *ebdp = NULL; 1367 bool vlan_packet_rcvd = false; 1368 u16 vlan_tag; 1369 int index = 0; 1370 bool is_copybreak; 1371 bool need_swap = fep->quirks & FEC_QUIRK_SWAP_FRAME; 1372 1373 #ifdef CONFIG_M532x 1374 flush_cache_all(); 1375 #endif 1376 queue_id = FEC_ENET_GET_QUQUE(queue_id); 1377 rxq = fep->rx_queue[queue_id]; 1378 1379 /* First, grab all of the stats for the incoming packet. 1380 * These get messed up if we get called due to a busy condition. 1381 */ 1382 bdp = rxq->cur_rx; 1383 1384 while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) { 1385 1386 if (pkt_received >= budget) 1387 break; 1388 pkt_received++; 1389 1390 /* Since we have allocated space to hold a complete frame, 1391 * the last indicator should be set. 1392 */ 1393 if ((status & BD_ENET_RX_LAST) == 0) 1394 netdev_err(ndev, "rcv is not +last\n"); 1395 1396 1397 /* Check for errors. */ 1398 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | 1399 BD_ENET_RX_CR | BD_ENET_RX_OV)) { 1400 ndev->stats.rx_errors++; 1401 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) { 1402 /* Frame too long or too short. */ 1403 ndev->stats.rx_length_errors++; 1404 } 1405 if (status & BD_ENET_RX_NO) /* Frame alignment */ 1406 ndev->stats.rx_frame_errors++; 1407 if (status & BD_ENET_RX_CR) /* CRC Error */ 1408 ndev->stats.rx_crc_errors++; 1409 if (status & BD_ENET_RX_OV) /* FIFO overrun */ 1410 ndev->stats.rx_fifo_errors++; 1411 } 1412 1413 /* Report late collisions as a frame error. 1414 * On this error, the BD is closed, but we don't know what we 1415 * have in the buffer. So, just drop this frame on the floor. 1416 */ 1417 if (status & BD_ENET_RX_CL) { 1418 ndev->stats.rx_errors++; 1419 ndev->stats.rx_frame_errors++; 1420 goto rx_processing_done; 1421 } 1422 1423 /* Process the incoming frame. */ 1424 ndev->stats.rx_packets++; 1425 pkt_len = bdp->cbd_datlen; 1426 ndev->stats.rx_bytes += pkt_len; 1427 1428 index = fec_enet_get_bd_index(rxq->rx_bd_base, bdp, fep); 1429 skb = rxq->rx_skbuff[index]; 1430 1431 /* The packet length includes FCS, but we don't want to 1432 * include that when passing upstream as it messes up 1433 * bridging applications. 1434 */ 1435 is_copybreak = fec_enet_copybreak(ndev, &skb, bdp, pkt_len - 4, 1436 need_swap); 1437 if (!is_copybreak) { 1438 skb_new = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE); 1439 if (unlikely(!skb_new)) { 1440 ndev->stats.rx_dropped++; 1441 goto rx_processing_done; 1442 } 1443 dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, 1444 FEC_ENET_RX_FRSIZE - fep->rx_align, 1445 DMA_FROM_DEVICE); 1446 } 1447 1448 prefetch(skb->data - NET_IP_ALIGN); 1449 skb_put(skb, pkt_len - 4); 1450 data = skb->data; 1451 if (!is_copybreak && need_swap) 1452 swap_buffer(data, pkt_len); 1453 1454 /* Extract the enhanced buffer descriptor */ 1455 ebdp = NULL; 1456 if (fep->bufdesc_ex) 1457 ebdp = (struct bufdesc_ex *)bdp; 1458 1459 /* If this is a VLAN packet remove the VLAN Tag */ 1460 vlan_packet_rcvd = false; 1461 if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) && 1462 fep->bufdesc_ex && (ebdp->cbd_esc & BD_ENET_RX_VLAN)) { 1463 /* Push and remove the vlan tag */ 1464 struct vlan_hdr *vlan_header = 1465 (struct vlan_hdr *) (data + ETH_HLEN); 1466 vlan_tag = ntohs(vlan_header->h_vlan_TCI); 1467 1468 vlan_packet_rcvd = true; 1469 1470 memmove(skb->data + VLAN_HLEN, data, ETH_ALEN * 2); 1471 skb_pull(skb, VLAN_HLEN); 1472 } 1473 1474 skb->protocol = eth_type_trans(skb, ndev); 1475 1476 /* Get receive timestamp from the skb */ 1477 if (fep->hwts_rx_en && fep->bufdesc_ex) 1478 fec_enet_hwtstamp(fep, ebdp->ts, 1479 skb_hwtstamps(skb)); 1480 1481 if (fep->bufdesc_ex && 1482 (fep->csum_flags & FLAG_RX_CSUM_ENABLED)) { 1483 if (!(ebdp->cbd_esc & FLAG_RX_CSUM_ERROR)) { 1484 /* don't check it */ 1485 skb->ip_summed = CHECKSUM_UNNECESSARY; 1486 } else { 1487 skb_checksum_none_assert(skb); 1488 } 1489 } 1490 1491 /* Handle received VLAN packets */ 1492 if (vlan_packet_rcvd) 1493 __vlan_hwaccel_put_tag(skb, 1494 htons(ETH_P_8021Q), 1495 vlan_tag); 1496 1497 napi_gro_receive(&fep->napi, skb); 1498 1499 if (is_copybreak) { 1500 dma_sync_single_for_device(&fep->pdev->dev, bdp->cbd_bufaddr, 1501 FEC_ENET_RX_FRSIZE - fep->rx_align, 1502 DMA_FROM_DEVICE); 1503 } else { 1504 rxq->rx_skbuff[index] = skb_new; 1505 fec_enet_new_rxbdp(ndev, bdp, skb_new); 1506 } 1507 1508 rx_processing_done: 1509 /* Clear the status flags for this buffer */ 1510 status &= ~BD_ENET_RX_STATS; 1511 1512 /* Mark the buffer empty */ 1513 status |= BD_ENET_RX_EMPTY; 1514 bdp->cbd_sc = status; 1515 1516 if (fep->bufdesc_ex) { 1517 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1518 1519 ebdp->cbd_esc = BD_ENET_RX_INT; 1520 ebdp->cbd_prot = 0; 1521 ebdp->cbd_bdu = 0; 1522 } 1523 1524 /* Update BD pointer to next entry */ 1525 bdp = fec_enet_get_nextdesc(bdp, fep, queue_id); 1526 1527 /* Doing this here will keep the FEC running while we process 1528 * incoming frames. On a heavily loaded network, we should be 1529 * able to keep up at the expense of system resources. 1530 */ 1531 writel(0, fep->hwp + FEC_R_DES_ACTIVE(queue_id)); 1532 } 1533 rxq->cur_rx = bdp; 1534 return pkt_received; 1535 } 1536 1537 static int 1538 fec_enet_rx(struct net_device *ndev, int budget) 1539 { 1540 int pkt_received = 0; 1541 u16 queue_id; 1542 struct fec_enet_private *fep = netdev_priv(ndev); 1543 1544 for_each_set_bit(queue_id, &fep->work_rx, FEC_ENET_MAX_RX_QS) { 1545 clear_bit(queue_id, &fep->work_rx); 1546 pkt_received += fec_enet_rx_queue(ndev, 1547 budget - pkt_received, queue_id); 1548 } 1549 return pkt_received; 1550 } 1551 1552 static bool 1553 fec_enet_collect_events(struct fec_enet_private *fep, uint int_events) 1554 { 1555 if (int_events == 0) 1556 return false; 1557 1558 if (int_events & FEC_ENET_RXF) 1559 fep->work_rx |= (1 << 2); 1560 if (int_events & FEC_ENET_RXF_1) 1561 fep->work_rx |= (1 << 0); 1562 if (int_events & FEC_ENET_RXF_2) 1563 fep->work_rx |= (1 << 1); 1564 1565 if (int_events & FEC_ENET_TXF) 1566 fep->work_tx |= (1 << 2); 1567 if (int_events & FEC_ENET_TXF_1) 1568 fep->work_tx |= (1 << 0); 1569 if (int_events & FEC_ENET_TXF_2) 1570 fep->work_tx |= (1 << 1); 1571 1572 return true; 1573 } 1574 1575 static irqreturn_t 1576 fec_enet_interrupt(int irq, void *dev_id) 1577 { 1578 struct net_device *ndev = dev_id; 1579 struct fec_enet_private *fep = netdev_priv(ndev); 1580 uint int_events; 1581 irqreturn_t ret = IRQ_NONE; 1582 1583 int_events = readl(fep->hwp + FEC_IEVENT); 1584 writel(int_events, fep->hwp + FEC_IEVENT); 1585 fec_enet_collect_events(fep, int_events); 1586 1587 if ((fep->work_tx || fep->work_rx) && fep->link) { 1588 ret = IRQ_HANDLED; 1589 1590 if (napi_schedule_prep(&fep->napi)) { 1591 /* Disable the NAPI interrupts */ 1592 writel(FEC_ENET_MII, fep->hwp + FEC_IMASK); 1593 __napi_schedule(&fep->napi); 1594 } 1595 } 1596 1597 if (int_events & FEC_ENET_MII) { 1598 ret = IRQ_HANDLED; 1599 complete(&fep->mdio_done); 1600 } 1601 1602 if (fep->ptp_clock) 1603 fec_ptp_check_pps_event(fep); 1604 1605 return ret; 1606 } 1607 1608 static int fec_enet_rx_napi(struct napi_struct *napi, int budget) 1609 { 1610 struct net_device *ndev = napi->dev; 1611 struct fec_enet_private *fep = netdev_priv(ndev); 1612 int pkts; 1613 1614 pkts = fec_enet_rx(ndev, budget); 1615 1616 fec_enet_tx(ndev); 1617 1618 if (pkts < budget) { 1619 napi_complete(napi); 1620 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1621 } 1622 return pkts; 1623 } 1624 1625 /* ------------------------------------------------------------------------- */ 1626 static void fec_get_mac(struct net_device *ndev) 1627 { 1628 struct fec_enet_private *fep = netdev_priv(ndev); 1629 struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev); 1630 unsigned char *iap, tmpaddr[ETH_ALEN]; 1631 1632 /* 1633 * try to get mac address in following order: 1634 * 1635 * 1) module parameter via kernel command line in form 1636 * fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0 1637 */ 1638 iap = macaddr; 1639 1640 /* 1641 * 2) from device tree data 1642 */ 1643 if (!is_valid_ether_addr(iap)) { 1644 struct device_node *np = fep->pdev->dev.of_node; 1645 if (np) { 1646 const char *mac = of_get_mac_address(np); 1647 if (mac) 1648 iap = (unsigned char *) mac; 1649 } 1650 } 1651 1652 /* 1653 * 3) from flash or fuse (via platform data) 1654 */ 1655 if (!is_valid_ether_addr(iap)) { 1656 #ifdef CONFIG_M5272 1657 if (FEC_FLASHMAC) 1658 iap = (unsigned char *)FEC_FLASHMAC; 1659 #else 1660 if (pdata) 1661 iap = (unsigned char *)&pdata->mac; 1662 #endif 1663 } 1664 1665 /* 1666 * 4) FEC mac registers set by bootloader 1667 */ 1668 if (!is_valid_ether_addr(iap)) { 1669 *((__be32 *) &tmpaddr[0]) = 1670 cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW)); 1671 *((__be16 *) &tmpaddr[4]) = 1672 cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); 1673 iap = &tmpaddr[0]; 1674 } 1675 1676 /* 1677 * 5) random mac address 1678 */ 1679 if (!is_valid_ether_addr(iap)) { 1680 /* Report it and use a random ethernet address instead */ 1681 netdev_err(ndev, "Invalid MAC address: %pM\n", iap); 1682 eth_hw_addr_random(ndev); 1683 netdev_info(ndev, "Using random MAC address: %pM\n", 1684 ndev->dev_addr); 1685 return; 1686 } 1687 1688 memcpy(ndev->dev_addr, iap, ETH_ALEN); 1689 1690 /* Adjust MAC if using macaddr */ 1691 if (iap == macaddr) 1692 ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id; 1693 } 1694 1695 /* ------------------------------------------------------------------------- */ 1696 1697 /* 1698 * Phy section 1699 */ 1700 static void fec_enet_adjust_link(struct net_device *ndev) 1701 { 1702 struct fec_enet_private *fep = netdev_priv(ndev); 1703 struct phy_device *phy_dev = fep->phy_dev; 1704 int status_change = 0; 1705 1706 /* Prevent a state halted on mii error */ 1707 if (fep->mii_timeout && phy_dev->state == PHY_HALTED) { 1708 phy_dev->state = PHY_RESUMING; 1709 return; 1710 } 1711 1712 /* 1713 * If the netdev is down, or is going down, we're not interested 1714 * in link state events, so just mark our idea of the link as down 1715 * and ignore the event. 1716 */ 1717 if (!netif_running(ndev) || !netif_device_present(ndev)) { 1718 fep->link = 0; 1719 } else if (phy_dev->link) { 1720 if (!fep->link) { 1721 fep->link = phy_dev->link; 1722 status_change = 1; 1723 } 1724 1725 if (fep->full_duplex != phy_dev->duplex) { 1726 fep->full_duplex = phy_dev->duplex; 1727 status_change = 1; 1728 } 1729 1730 if (phy_dev->speed != fep->speed) { 1731 fep->speed = phy_dev->speed; 1732 status_change = 1; 1733 } 1734 1735 /* if any of the above changed restart the FEC */ 1736 if (status_change) { 1737 napi_disable(&fep->napi); 1738 netif_tx_lock_bh(ndev); 1739 fec_restart(ndev); 1740 netif_wake_queue(ndev); 1741 netif_tx_unlock_bh(ndev); 1742 napi_enable(&fep->napi); 1743 } 1744 } else { 1745 if (fep->link) { 1746 napi_disable(&fep->napi); 1747 netif_tx_lock_bh(ndev); 1748 fec_stop(ndev); 1749 netif_tx_unlock_bh(ndev); 1750 napi_enable(&fep->napi); 1751 fep->link = phy_dev->link; 1752 status_change = 1; 1753 } 1754 } 1755 1756 if (status_change) 1757 phy_print_status(phy_dev); 1758 } 1759 1760 static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum) 1761 { 1762 struct fec_enet_private *fep = bus->priv; 1763 unsigned long time_left; 1764 1765 fep->mii_timeout = 0; 1766 init_completion(&fep->mdio_done); 1767 1768 /* start a read op */ 1769 writel(FEC_MMFR_ST | FEC_MMFR_OP_READ | 1770 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | 1771 FEC_MMFR_TA, fep->hwp + FEC_MII_DATA); 1772 1773 /* wait for end of transfer */ 1774 time_left = wait_for_completion_timeout(&fep->mdio_done, 1775 usecs_to_jiffies(FEC_MII_TIMEOUT)); 1776 if (time_left == 0) { 1777 fep->mii_timeout = 1; 1778 netdev_err(fep->netdev, "MDIO read timeout\n"); 1779 return -ETIMEDOUT; 1780 } 1781 1782 /* return value */ 1783 return FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA)); 1784 } 1785 1786 static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum, 1787 u16 value) 1788 { 1789 struct fec_enet_private *fep = bus->priv; 1790 unsigned long time_left; 1791 1792 fep->mii_timeout = 0; 1793 init_completion(&fep->mdio_done); 1794 1795 /* start a write op */ 1796 writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE | 1797 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | 1798 FEC_MMFR_TA | FEC_MMFR_DATA(value), 1799 fep->hwp + FEC_MII_DATA); 1800 1801 /* wait for end of transfer */ 1802 time_left = wait_for_completion_timeout(&fep->mdio_done, 1803 usecs_to_jiffies(FEC_MII_TIMEOUT)); 1804 if (time_left == 0) { 1805 fep->mii_timeout = 1; 1806 netdev_err(fep->netdev, "MDIO write timeout\n"); 1807 return -ETIMEDOUT; 1808 } 1809 1810 return 0; 1811 } 1812 1813 static int fec_enet_clk_enable(struct net_device *ndev, bool enable) 1814 { 1815 struct fec_enet_private *fep = netdev_priv(ndev); 1816 int ret; 1817 1818 if (enable) { 1819 ret = clk_prepare_enable(fep->clk_ahb); 1820 if (ret) 1821 return ret; 1822 ret = clk_prepare_enable(fep->clk_ipg); 1823 if (ret) 1824 goto failed_clk_ipg; 1825 if (fep->clk_enet_out) { 1826 ret = clk_prepare_enable(fep->clk_enet_out); 1827 if (ret) 1828 goto failed_clk_enet_out; 1829 } 1830 if (fep->clk_ptp) { 1831 mutex_lock(&fep->ptp_clk_mutex); 1832 ret = clk_prepare_enable(fep->clk_ptp); 1833 if (ret) { 1834 mutex_unlock(&fep->ptp_clk_mutex); 1835 goto failed_clk_ptp; 1836 } else { 1837 fep->ptp_clk_on = true; 1838 } 1839 mutex_unlock(&fep->ptp_clk_mutex); 1840 } 1841 if (fep->clk_ref) { 1842 ret = clk_prepare_enable(fep->clk_ref); 1843 if (ret) 1844 goto failed_clk_ref; 1845 } 1846 } else { 1847 clk_disable_unprepare(fep->clk_ahb); 1848 clk_disable_unprepare(fep->clk_ipg); 1849 if (fep->clk_enet_out) 1850 clk_disable_unprepare(fep->clk_enet_out); 1851 if (fep->clk_ptp) { 1852 mutex_lock(&fep->ptp_clk_mutex); 1853 clk_disable_unprepare(fep->clk_ptp); 1854 fep->ptp_clk_on = false; 1855 mutex_unlock(&fep->ptp_clk_mutex); 1856 } 1857 if (fep->clk_ref) 1858 clk_disable_unprepare(fep->clk_ref); 1859 } 1860 1861 return 0; 1862 1863 failed_clk_ref: 1864 if (fep->clk_ref) 1865 clk_disable_unprepare(fep->clk_ref); 1866 failed_clk_ptp: 1867 if (fep->clk_enet_out) 1868 clk_disable_unprepare(fep->clk_enet_out); 1869 failed_clk_enet_out: 1870 clk_disable_unprepare(fep->clk_ipg); 1871 failed_clk_ipg: 1872 clk_disable_unprepare(fep->clk_ahb); 1873 1874 return ret; 1875 } 1876 1877 static int fec_enet_mii_probe(struct net_device *ndev) 1878 { 1879 struct fec_enet_private *fep = netdev_priv(ndev); 1880 struct phy_device *phy_dev = NULL; 1881 char mdio_bus_id[MII_BUS_ID_SIZE]; 1882 char phy_name[MII_BUS_ID_SIZE + 3]; 1883 int phy_id; 1884 int dev_id = fep->dev_id; 1885 1886 fep->phy_dev = NULL; 1887 1888 if (fep->phy_node) { 1889 phy_dev = of_phy_connect(ndev, fep->phy_node, 1890 &fec_enet_adjust_link, 0, 1891 fep->phy_interface); 1892 if (!phy_dev) 1893 return -ENODEV; 1894 } else { 1895 /* check for attached phy */ 1896 for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) { 1897 if ((fep->mii_bus->phy_mask & (1 << phy_id))) 1898 continue; 1899 if (fep->mii_bus->phy_map[phy_id] == NULL) 1900 continue; 1901 if (fep->mii_bus->phy_map[phy_id]->phy_id == 0) 1902 continue; 1903 if (dev_id--) 1904 continue; 1905 strlcpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE); 1906 break; 1907 } 1908 1909 if (phy_id >= PHY_MAX_ADDR) { 1910 netdev_info(ndev, "no PHY, assuming direct connection to switch\n"); 1911 strlcpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); 1912 phy_id = 0; 1913 } 1914 1915 snprintf(phy_name, sizeof(phy_name), 1916 PHY_ID_FMT, mdio_bus_id, phy_id); 1917 phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 1918 fep->phy_interface); 1919 } 1920 1921 if (IS_ERR(phy_dev)) { 1922 netdev_err(ndev, "could not attach to PHY\n"); 1923 return PTR_ERR(phy_dev); 1924 } 1925 1926 /* mask with MAC supported features */ 1927 if (fep->quirks & FEC_QUIRK_HAS_GBIT) { 1928 phy_dev->supported &= PHY_GBIT_FEATURES; 1929 phy_dev->supported &= ~SUPPORTED_1000baseT_Half; 1930 #if !defined(CONFIG_M5272) 1931 phy_dev->supported |= SUPPORTED_Pause; 1932 #endif 1933 } 1934 else 1935 phy_dev->supported &= PHY_BASIC_FEATURES; 1936 1937 phy_dev->advertising = phy_dev->supported; 1938 1939 fep->phy_dev = phy_dev; 1940 fep->link = 0; 1941 fep->full_duplex = 0; 1942 1943 netdev_info(ndev, "Freescale FEC PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", 1944 fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev), 1945 fep->phy_dev->irq); 1946 1947 return 0; 1948 } 1949 1950 static int fec_enet_mii_init(struct platform_device *pdev) 1951 { 1952 static struct mii_bus *fec0_mii_bus; 1953 struct net_device *ndev = platform_get_drvdata(pdev); 1954 struct fec_enet_private *fep = netdev_priv(ndev); 1955 struct device_node *node; 1956 int err = -ENXIO, i; 1957 u32 mii_speed, holdtime; 1958 1959 /* 1960 * The i.MX28 dual fec interfaces are not equal. 1961 * Here are the differences: 1962 * 1963 * - fec0 supports MII & RMII modes while fec1 only supports RMII 1964 * - fec0 acts as the 1588 time master while fec1 is slave 1965 * - external phys can only be configured by fec0 1966 * 1967 * That is to say fec1 can not work independently. It only works 1968 * when fec0 is working. The reason behind this design is that the 1969 * second interface is added primarily for Switch mode. 1970 * 1971 * Because of the last point above, both phys are attached on fec0 1972 * mdio interface in board design, and need to be configured by 1973 * fec0 mii_bus. 1974 */ 1975 if ((fep->quirks & FEC_QUIRK_SINGLE_MDIO) && fep->dev_id > 0) { 1976 /* fec1 uses fec0 mii_bus */ 1977 if (mii_cnt && fec0_mii_bus) { 1978 fep->mii_bus = fec0_mii_bus; 1979 mii_cnt++; 1980 return 0; 1981 } 1982 return -ENOENT; 1983 } 1984 1985 fep->mii_timeout = 0; 1986 1987 /* 1988 * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed) 1989 * 1990 * The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while 1991 * for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'. The i.MX28 1992 * Reference Manual has an error on this, and gets fixed on i.MX6Q 1993 * document. 1994 */ 1995 mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000); 1996 if (fep->quirks & FEC_QUIRK_ENET_MAC) 1997 mii_speed--; 1998 if (mii_speed > 63) { 1999 dev_err(&pdev->dev, 2000 "fec clock (%lu) to fast to get right mii speed\n", 2001 clk_get_rate(fep->clk_ipg)); 2002 err = -EINVAL; 2003 goto err_out; 2004 } 2005 2006 /* 2007 * The i.MX28 and i.MX6 types have another filed in the MSCR (aka 2008 * MII_SPEED) register that defines the MDIO output hold time. Earlier 2009 * versions are RAZ there, so just ignore the difference and write the 2010 * register always. 2011 * The minimal hold time according to IEE802.3 (clause 22) is 10 ns. 2012 * HOLDTIME + 1 is the number of clk cycles the fec is holding the 2013 * output. 2014 * The HOLDTIME bitfield takes values between 0 and 7 (inclusive). 2015 * Given that ceil(clkrate / 5000000) <= 64, the calculation for 2016 * holdtime cannot result in a value greater than 3. 2017 */ 2018 holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1; 2019 2020 fep->phy_speed = mii_speed << 1 | holdtime << 8; 2021 2022 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 2023 2024 fep->mii_bus = mdiobus_alloc(); 2025 if (fep->mii_bus == NULL) { 2026 err = -ENOMEM; 2027 goto err_out; 2028 } 2029 2030 fep->mii_bus->name = "fec_enet_mii_bus"; 2031 fep->mii_bus->read = fec_enet_mdio_read; 2032 fep->mii_bus->write = fec_enet_mdio_write; 2033 snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 2034 pdev->name, fep->dev_id + 1); 2035 fep->mii_bus->priv = fep; 2036 fep->mii_bus->parent = &pdev->dev; 2037 2038 fep->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); 2039 if (!fep->mii_bus->irq) { 2040 err = -ENOMEM; 2041 goto err_out_free_mdiobus; 2042 } 2043 2044 for (i = 0; i < PHY_MAX_ADDR; i++) 2045 fep->mii_bus->irq[i] = PHY_POLL; 2046 2047 node = of_get_child_by_name(pdev->dev.of_node, "mdio"); 2048 if (node) { 2049 err = of_mdiobus_register(fep->mii_bus, node); 2050 of_node_put(node); 2051 } else { 2052 err = mdiobus_register(fep->mii_bus); 2053 } 2054 2055 if (err) 2056 goto err_out_free_mdio_irq; 2057 2058 mii_cnt++; 2059 2060 /* save fec0 mii_bus */ 2061 if (fep->quirks & FEC_QUIRK_SINGLE_MDIO) 2062 fec0_mii_bus = fep->mii_bus; 2063 2064 return 0; 2065 2066 err_out_free_mdio_irq: 2067 kfree(fep->mii_bus->irq); 2068 err_out_free_mdiobus: 2069 mdiobus_free(fep->mii_bus); 2070 err_out: 2071 return err; 2072 } 2073 2074 static void fec_enet_mii_remove(struct fec_enet_private *fep) 2075 { 2076 if (--mii_cnt == 0) { 2077 mdiobus_unregister(fep->mii_bus); 2078 kfree(fep->mii_bus->irq); 2079 mdiobus_free(fep->mii_bus); 2080 } 2081 } 2082 2083 static int fec_enet_get_settings(struct net_device *ndev, 2084 struct ethtool_cmd *cmd) 2085 { 2086 struct fec_enet_private *fep = netdev_priv(ndev); 2087 struct phy_device *phydev = fep->phy_dev; 2088 2089 if (!phydev) 2090 return -ENODEV; 2091 2092 return phy_ethtool_gset(phydev, cmd); 2093 } 2094 2095 static int fec_enet_set_settings(struct net_device *ndev, 2096 struct ethtool_cmd *cmd) 2097 { 2098 struct fec_enet_private *fep = netdev_priv(ndev); 2099 struct phy_device *phydev = fep->phy_dev; 2100 2101 if (!phydev) 2102 return -ENODEV; 2103 2104 return phy_ethtool_sset(phydev, cmd); 2105 } 2106 2107 static void fec_enet_get_drvinfo(struct net_device *ndev, 2108 struct ethtool_drvinfo *info) 2109 { 2110 struct fec_enet_private *fep = netdev_priv(ndev); 2111 2112 strlcpy(info->driver, fep->pdev->dev.driver->name, 2113 sizeof(info->driver)); 2114 strlcpy(info->version, "Revision: 1.0", sizeof(info->version)); 2115 strlcpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info)); 2116 } 2117 2118 static int fec_enet_get_ts_info(struct net_device *ndev, 2119 struct ethtool_ts_info *info) 2120 { 2121 struct fec_enet_private *fep = netdev_priv(ndev); 2122 2123 if (fep->bufdesc_ex) { 2124 2125 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | 2126 SOF_TIMESTAMPING_RX_SOFTWARE | 2127 SOF_TIMESTAMPING_SOFTWARE | 2128 SOF_TIMESTAMPING_TX_HARDWARE | 2129 SOF_TIMESTAMPING_RX_HARDWARE | 2130 SOF_TIMESTAMPING_RAW_HARDWARE; 2131 if (fep->ptp_clock) 2132 info->phc_index = ptp_clock_index(fep->ptp_clock); 2133 else 2134 info->phc_index = -1; 2135 2136 info->tx_types = (1 << HWTSTAMP_TX_OFF) | 2137 (1 << HWTSTAMP_TX_ON); 2138 2139 info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | 2140 (1 << HWTSTAMP_FILTER_ALL); 2141 return 0; 2142 } else { 2143 return ethtool_op_get_ts_info(ndev, info); 2144 } 2145 } 2146 2147 #if !defined(CONFIG_M5272) 2148 2149 static void fec_enet_get_pauseparam(struct net_device *ndev, 2150 struct ethtool_pauseparam *pause) 2151 { 2152 struct fec_enet_private *fep = netdev_priv(ndev); 2153 2154 pause->autoneg = (fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) != 0; 2155 pause->tx_pause = (fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) != 0; 2156 pause->rx_pause = pause->tx_pause; 2157 } 2158 2159 static int fec_enet_set_pauseparam(struct net_device *ndev, 2160 struct ethtool_pauseparam *pause) 2161 { 2162 struct fec_enet_private *fep = netdev_priv(ndev); 2163 2164 if (!fep->phy_dev) 2165 return -ENODEV; 2166 2167 if (pause->tx_pause != pause->rx_pause) { 2168 netdev_info(ndev, 2169 "hardware only support enable/disable both tx and rx"); 2170 return -EINVAL; 2171 } 2172 2173 fep->pause_flag = 0; 2174 2175 /* tx pause must be same as rx pause */ 2176 fep->pause_flag |= pause->rx_pause ? FEC_PAUSE_FLAG_ENABLE : 0; 2177 fep->pause_flag |= pause->autoneg ? FEC_PAUSE_FLAG_AUTONEG : 0; 2178 2179 if (pause->rx_pause || pause->autoneg) { 2180 fep->phy_dev->supported |= ADVERTISED_Pause; 2181 fep->phy_dev->advertising |= ADVERTISED_Pause; 2182 } else { 2183 fep->phy_dev->supported &= ~ADVERTISED_Pause; 2184 fep->phy_dev->advertising &= ~ADVERTISED_Pause; 2185 } 2186 2187 if (pause->autoneg) { 2188 if (netif_running(ndev)) 2189 fec_stop(ndev); 2190 phy_start_aneg(fep->phy_dev); 2191 } 2192 if (netif_running(ndev)) { 2193 napi_disable(&fep->napi); 2194 netif_tx_lock_bh(ndev); 2195 fec_restart(ndev); 2196 netif_wake_queue(ndev); 2197 netif_tx_unlock_bh(ndev); 2198 napi_enable(&fep->napi); 2199 } 2200 2201 return 0; 2202 } 2203 2204 static const struct fec_stat { 2205 char name[ETH_GSTRING_LEN]; 2206 u16 offset; 2207 } fec_stats[] = { 2208 /* RMON TX */ 2209 { "tx_dropped", RMON_T_DROP }, 2210 { "tx_packets", RMON_T_PACKETS }, 2211 { "tx_broadcast", RMON_T_BC_PKT }, 2212 { "tx_multicast", RMON_T_MC_PKT }, 2213 { "tx_crc_errors", RMON_T_CRC_ALIGN }, 2214 { "tx_undersize", RMON_T_UNDERSIZE }, 2215 { "tx_oversize", RMON_T_OVERSIZE }, 2216 { "tx_fragment", RMON_T_FRAG }, 2217 { "tx_jabber", RMON_T_JAB }, 2218 { "tx_collision", RMON_T_COL }, 2219 { "tx_64byte", RMON_T_P64 }, 2220 { "tx_65to127byte", RMON_T_P65TO127 }, 2221 { "tx_128to255byte", RMON_T_P128TO255 }, 2222 { "tx_256to511byte", RMON_T_P256TO511 }, 2223 { "tx_512to1023byte", RMON_T_P512TO1023 }, 2224 { "tx_1024to2047byte", RMON_T_P1024TO2047 }, 2225 { "tx_GTE2048byte", RMON_T_P_GTE2048 }, 2226 { "tx_octets", RMON_T_OCTETS }, 2227 2228 /* IEEE TX */ 2229 { "IEEE_tx_drop", IEEE_T_DROP }, 2230 { "IEEE_tx_frame_ok", IEEE_T_FRAME_OK }, 2231 { "IEEE_tx_1col", IEEE_T_1COL }, 2232 { "IEEE_tx_mcol", IEEE_T_MCOL }, 2233 { "IEEE_tx_def", IEEE_T_DEF }, 2234 { "IEEE_tx_lcol", IEEE_T_LCOL }, 2235 { "IEEE_tx_excol", IEEE_T_EXCOL }, 2236 { "IEEE_tx_macerr", IEEE_T_MACERR }, 2237 { "IEEE_tx_cserr", IEEE_T_CSERR }, 2238 { "IEEE_tx_sqe", IEEE_T_SQE }, 2239 { "IEEE_tx_fdxfc", IEEE_T_FDXFC }, 2240 { "IEEE_tx_octets_ok", IEEE_T_OCTETS_OK }, 2241 2242 /* RMON RX */ 2243 { "rx_packets", RMON_R_PACKETS }, 2244 { "rx_broadcast", RMON_R_BC_PKT }, 2245 { "rx_multicast", RMON_R_MC_PKT }, 2246 { "rx_crc_errors", RMON_R_CRC_ALIGN }, 2247 { "rx_undersize", RMON_R_UNDERSIZE }, 2248 { "rx_oversize", RMON_R_OVERSIZE }, 2249 { "rx_fragment", RMON_R_FRAG }, 2250 { "rx_jabber", RMON_R_JAB }, 2251 { "rx_64byte", RMON_R_P64 }, 2252 { "rx_65to127byte", RMON_R_P65TO127 }, 2253 { "rx_128to255byte", RMON_R_P128TO255 }, 2254 { "rx_256to511byte", RMON_R_P256TO511 }, 2255 { "rx_512to1023byte", RMON_R_P512TO1023 }, 2256 { "rx_1024to2047byte", RMON_R_P1024TO2047 }, 2257 { "rx_GTE2048byte", RMON_R_P_GTE2048 }, 2258 { "rx_octets", RMON_R_OCTETS }, 2259 2260 /* IEEE RX */ 2261 { "IEEE_rx_drop", IEEE_R_DROP }, 2262 { "IEEE_rx_frame_ok", IEEE_R_FRAME_OK }, 2263 { "IEEE_rx_crc", IEEE_R_CRC }, 2264 { "IEEE_rx_align", IEEE_R_ALIGN }, 2265 { "IEEE_rx_macerr", IEEE_R_MACERR }, 2266 { "IEEE_rx_fdxfc", IEEE_R_FDXFC }, 2267 { "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK }, 2268 }; 2269 2270 static void fec_enet_get_ethtool_stats(struct net_device *dev, 2271 struct ethtool_stats *stats, u64 *data) 2272 { 2273 struct fec_enet_private *fep = netdev_priv(dev); 2274 int i; 2275 2276 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 2277 data[i] = readl(fep->hwp + fec_stats[i].offset); 2278 } 2279 2280 static void fec_enet_get_strings(struct net_device *netdev, 2281 u32 stringset, u8 *data) 2282 { 2283 int i; 2284 switch (stringset) { 2285 case ETH_SS_STATS: 2286 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 2287 memcpy(data + i * ETH_GSTRING_LEN, 2288 fec_stats[i].name, ETH_GSTRING_LEN); 2289 break; 2290 } 2291 } 2292 2293 static int fec_enet_get_sset_count(struct net_device *dev, int sset) 2294 { 2295 switch (sset) { 2296 case ETH_SS_STATS: 2297 return ARRAY_SIZE(fec_stats); 2298 default: 2299 return -EOPNOTSUPP; 2300 } 2301 } 2302 #endif /* !defined(CONFIG_M5272) */ 2303 2304 static int fec_enet_nway_reset(struct net_device *dev) 2305 { 2306 struct fec_enet_private *fep = netdev_priv(dev); 2307 struct phy_device *phydev = fep->phy_dev; 2308 2309 if (!phydev) 2310 return -ENODEV; 2311 2312 return genphy_restart_aneg(phydev); 2313 } 2314 2315 /* ITR clock source is enet system clock (clk_ahb). 2316 * TCTT unit is cycle_ns * 64 cycle 2317 * So, the ICTT value = X us / (cycle_ns * 64) 2318 */ 2319 static int fec_enet_us_to_itr_clock(struct net_device *ndev, int us) 2320 { 2321 struct fec_enet_private *fep = netdev_priv(ndev); 2322 2323 return us * (fep->itr_clk_rate / 64000) / 1000; 2324 } 2325 2326 /* Set threshold for interrupt coalescing */ 2327 static void fec_enet_itr_coal_set(struct net_device *ndev) 2328 { 2329 struct fec_enet_private *fep = netdev_priv(ndev); 2330 int rx_itr, tx_itr; 2331 2332 if (!(fep->quirks & FEC_QUIRK_HAS_AVB)) 2333 return; 2334 2335 /* Must be greater than zero to avoid unpredictable behavior */ 2336 if (!fep->rx_time_itr || !fep->rx_pkts_itr || 2337 !fep->tx_time_itr || !fep->tx_pkts_itr) 2338 return; 2339 2340 /* Select enet system clock as Interrupt Coalescing 2341 * timer Clock Source 2342 */ 2343 rx_itr = FEC_ITR_CLK_SEL; 2344 tx_itr = FEC_ITR_CLK_SEL; 2345 2346 /* set ICFT and ICTT */ 2347 rx_itr |= FEC_ITR_ICFT(fep->rx_pkts_itr); 2348 rx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr)); 2349 tx_itr |= FEC_ITR_ICFT(fep->tx_pkts_itr); 2350 tx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr)); 2351 2352 rx_itr |= FEC_ITR_EN; 2353 tx_itr |= FEC_ITR_EN; 2354 2355 writel(tx_itr, fep->hwp + FEC_TXIC0); 2356 writel(rx_itr, fep->hwp + FEC_RXIC0); 2357 writel(tx_itr, fep->hwp + FEC_TXIC1); 2358 writel(rx_itr, fep->hwp + FEC_RXIC1); 2359 writel(tx_itr, fep->hwp + FEC_TXIC2); 2360 writel(rx_itr, fep->hwp + FEC_RXIC2); 2361 } 2362 2363 static int 2364 fec_enet_get_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec) 2365 { 2366 struct fec_enet_private *fep = netdev_priv(ndev); 2367 2368 if (!(fep->quirks & FEC_QUIRK_HAS_AVB)) 2369 return -EOPNOTSUPP; 2370 2371 ec->rx_coalesce_usecs = fep->rx_time_itr; 2372 ec->rx_max_coalesced_frames = fep->rx_pkts_itr; 2373 2374 ec->tx_coalesce_usecs = fep->tx_time_itr; 2375 ec->tx_max_coalesced_frames = fep->tx_pkts_itr; 2376 2377 return 0; 2378 } 2379 2380 static int 2381 fec_enet_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec) 2382 { 2383 struct fec_enet_private *fep = netdev_priv(ndev); 2384 unsigned int cycle; 2385 2386 if (!(fep->quirks & FEC_QUIRK_HAS_AVB)) 2387 return -EOPNOTSUPP; 2388 2389 if (ec->rx_max_coalesced_frames > 255) { 2390 pr_err("Rx coalesced frames exceed hardware limiation"); 2391 return -EINVAL; 2392 } 2393 2394 if (ec->tx_max_coalesced_frames > 255) { 2395 pr_err("Tx coalesced frame exceed hardware limiation"); 2396 return -EINVAL; 2397 } 2398 2399 cycle = fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr); 2400 if (cycle > 0xFFFF) { 2401 pr_err("Rx coalesed usec exceeed hardware limiation"); 2402 return -EINVAL; 2403 } 2404 2405 cycle = fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr); 2406 if (cycle > 0xFFFF) { 2407 pr_err("Rx coalesed usec exceeed hardware limiation"); 2408 return -EINVAL; 2409 } 2410 2411 fep->rx_time_itr = ec->rx_coalesce_usecs; 2412 fep->rx_pkts_itr = ec->rx_max_coalesced_frames; 2413 2414 fep->tx_time_itr = ec->tx_coalesce_usecs; 2415 fep->tx_pkts_itr = ec->tx_max_coalesced_frames; 2416 2417 fec_enet_itr_coal_set(ndev); 2418 2419 return 0; 2420 } 2421 2422 static void fec_enet_itr_coal_init(struct net_device *ndev) 2423 { 2424 struct ethtool_coalesce ec; 2425 2426 ec.rx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT; 2427 ec.rx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT; 2428 2429 ec.tx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT; 2430 ec.tx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT; 2431 2432 fec_enet_set_coalesce(ndev, &ec); 2433 } 2434 2435 static int fec_enet_get_tunable(struct net_device *netdev, 2436 const struct ethtool_tunable *tuna, 2437 void *data) 2438 { 2439 struct fec_enet_private *fep = netdev_priv(netdev); 2440 int ret = 0; 2441 2442 switch (tuna->id) { 2443 case ETHTOOL_RX_COPYBREAK: 2444 *(u32 *)data = fep->rx_copybreak; 2445 break; 2446 default: 2447 ret = -EINVAL; 2448 break; 2449 } 2450 2451 return ret; 2452 } 2453 2454 static int fec_enet_set_tunable(struct net_device *netdev, 2455 const struct ethtool_tunable *tuna, 2456 const void *data) 2457 { 2458 struct fec_enet_private *fep = netdev_priv(netdev); 2459 int ret = 0; 2460 2461 switch (tuna->id) { 2462 case ETHTOOL_RX_COPYBREAK: 2463 fep->rx_copybreak = *(u32 *)data; 2464 break; 2465 default: 2466 ret = -EINVAL; 2467 break; 2468 } 2469 2470 return ret; 2471 } 2472 2473 static void 2474 fec_enet_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol) 2475 { 2476 struct fec_enet_private *fep = netdev_priv(ndev); 2477 2478 if (fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET) { 2479 wol->supported = WAKE_MAGIC; 2480 wol->wolopts = fep->wol_flag & FEC_WOL_FLAG_ENABLE ? WAKE_MAGIC : 0; 2481 } else { 2482 wol->supported = wol->wolopts = 0; 2483 } 2484 } 2485 2486 static int 2487 fec_enet_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol) 2488 { 2489 struct fec_enet_private *fep = netdev_priv(ndev); 2490 2491 if (!(fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET)) 2492 return -EINVAL; 2493 2494 if (wol->wolopts & ~WAKE_MAGIC) 2495 return -EINVAL; 2496 2497 device_set_wakeup_enable(&ndev->dev, wol->wolopts & WAKE_MAGIC); 2498 if (device_may_wakeup(&ndev->dev)) { 2499 fep->wol_flag |= FEC_WOL_FLAG_ENABLE; 2500 if (fep->irq[0] > 0) 2501 enable_irq_wake(fep->irq[0]); 2502 } else { 2503 fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE); 2504 if (fep->irq[0] > 0) 2505 disable_irq_wake(fep->irq[0]); 2506 } 2507 2508 return 0; 2509 } 2510 2511 static const struct ethtool_ops fec_enet_ethtool_ops = { 2512 .get_settings = fec_enet_get_settings, 2513 .set_settings = fec_enet_set_settings, 2514 .get_drvinfo = fec_enet_get_drvinfo, 2515 .nway_reset = fec_enet_nway_reset, 2516 .get_link = ethtool_op_get_link, 2517 .get_coalesce = fec_enet_get_coalesce, 2518 .set_coalesce = fec_enet_set_coalesce, 2519 #ifndef CONFIG_M5272 2520 .get_pauseparam = fec_enet_get_pauseparam, 2521 .set_pauseparam = fec_enet_set_pauseparam, 2522 .get_strings = fec_enet_get_strings, 2523 .get_ethtool_stats = fec_enet_get_ethtool_stats, 2524 .get_sset_count = fec_enet_get_sset_count, 2525 #endif 2526 .get_ts_info = fec_enet_get_ts_info, 2527 .get_tunable = fec_enet_get_tunable, 2528 .set_tunable = fec_enet_set_tunable, 2529 .get_wol = fec_enet_get_wol, 2530 .set_wol = fec_enet_set_wol, 2531 }; 2532 2533 static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) 2534 { 2535 struct fec_enet_private *fep = netdev_priv(ndev); 2536 struct phy_device *phydev = fep->phy_dev; 2537 2538 if (!netif_running(ndev)) 2539 return -EINVAL; 2540 2541 if (!phydev) 2542 return -ENODEV; 2543 2544 if (fep->bufdesc_ex) { 2545 if (cmd == SIOCSHWTSTAMP) 2546 return fec_ptp_set(ndev, rq); 2547 if (cmd == SIOCGHWTSTAMP) 2548 return fec_ptp_get(ndev, rq); 2549 } 2550 2551 return phy_mii_ioctl(phydev, rq, cmd); 2552 } 2553 2554 static void fec_enet_free_buffers(struct net_device *ndev) 2555 { 2556 struct fec_enet_private *fep = netdev_priv(ndev); 2557 unsigned int i; 2558 struct sk_buff *skb; 2559 struct bufdesc *bdp; 2560 struct fec_enet_priv_tx_q *txq; 2561 struct fec_enet_priv_rx_q *rxq; 2562 unsigned int q; 2563 2564 for (q = 0; q < fep->num_rx_queues; q++) { 2565 rxq = fep->rx_queue[q]; 2566 bdp = rxq->rx_bd_base; 2567 for (i = 0; i < rxq->rx_ring_size; i++) { 2568 skb = rxq->rx_skbuff[i]; 2569 rxq->rx_skbuff[i] = NULL; 2570 if (skb) { 2571 dma_unmap_single(&fep->pdev->dev, 2572 bdp->cbd_bufaddr, 2573 FEC_ENET_RX_FRSIZE - fep->rx_align, 2574 DMA_FROM_DEVICE); 2575 dev_kfree_skb(skb); 2576 } 2577 bdp = fec_enet_get_nextdesc(bdp, fep, q); 2578 } 2579 } 2580 2581 for (q = 0; q < fep->num_tx_queues; q++) { 2582 txq = fep->tx_queue[q]; 2583 bdp = txq->tx_bd_base; 2584 for (i = 0; i < txq->tx_ring_size; i++) { 2585 kfree(txq->tx_bounce[i]); 2586 txq->tx_bounce[i] = NULL; 2587 skb = txq->tx_skbuff[i]; 2588 txq->tx_skbuff[i] = NULL; 2589 dev_kfree_skb(skb); 2590 } 2591 } 2592 } 2593 2594 static void fec_enet_free_queue(struct net_device *ndev) 2595 { 2596 struct fec_enet_private *fep = netdev_priv(ndev); 2597 int i; 2598 struct fec_enet_priv_tx_q *txq; 2599 2600 for (i = 0; i < fep->num_tx_queues; i++) 2601 if (fep->tx_queue[i] && fep->tx_queue[i]->tso_hdrs) { 2602 txq = fep->tx_queue[i]; 2603 dma_free_coherent(NULL, 2604 txq->tx_ring_size * TSO_HEADER_SIZE, 2605 txq->tso_hdrs, 2606 txq->tso_hdrs_dma); 2607 } 2608 2609 for (i = 0; i < fep->num_rx_queues; i++) 2610 kfree(fep->rx_queue[i]); 2611 for (i = 0; i < fep->num_tx_queues; i++) 2612 kfree(fep->tx_queue[i]); 2613 } 2614 2615 static int fec_enet_alloc_queue(struct net_device *ndev) 2616 { 2617 struct fec_enet_private *fep = netdev_priv(ndev); 2618 int i; 2619 int ret = 0; 2620 struct fec_enet_priv_tx_q *txq; 2621 2622 for (i = 0; i < fep->num_tx_queues; i++) { 2623 txq = kzalloc(sizeof(*txq), GFP_KERNEL); 2624 if (!txq) { 2625 ret = -ENOMEM; 2626 goto alloc_failed; 2627 } 2628 2629 fep->tx_queue[i] = txq; 2630 txq->tx_ring_size = TX_RING_SIZE; 2631 fep->total_tx_ring_size += fep->tx_queue[i]->tx_ring_size; 2632 2633 txq->tx_stop_threshold = FEC_MAX_SKB_DESCS; 2634 txq->tx_wake_threshold = 2635 (txq->tx_ring_size - txq->tx_stop_threshold) / 2; 2636 2637 txq->tso_hdrs = dma_alloc_coherent(NULL, 2638 txq->tx_ring_size * TSO_HEADER_SIZE, 2639 &txq->tso_hdrs_dma, 2640 GFP_KERNEL); 2641 if (!txq->tso_hdrs) { 2642 ret = -ENOMEM; 2643 goto alloc_failed; 2644 } 2645 } 2646 2647 for (i = 0; i < fep->num_rx_queues; i++) { 2648 fep->rx_queue[i] = kzalloc(sizeof(*fep->rx_queue[i]), 2649 GFP_KERNEL); 2650 if (!fep->rx_queue[i]) { 2651 ret = -ENOMEM; 2652 goto alloc_failed; 2653 } 2654 2655 fep->rx_queue[i]->rx_ring_size = RX_RING_SIZE; 2656 fep->total_rx_ring_size += fep->rx_queue[i]->rx_ring_size; 2657 } 2658 return ret; 2659 2660 alloc_failed: 2661 fec_enet_free_queue(ndev); 2662 return ret; 2663 } 2664 2665 static int 2666 fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue) 2667 { 2668 struct fec_enet_private *fep = netdev_priv(ndev); 2669 unsigned int i; 2670 struct sk_buff *skb; 2671 struct bufdesc *bdp; 2672 struct fec_enet_priv_rx_q *rxq; 2673 2674 rxq = fep->rx_queue[queue]; 2675 bdp = rxq->rx_bd_base; 2676 for (i = 0; i < rxq->rx_ring_size; i++) { 2677 skb = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE); 2678 if (!skb) 2679 goto err_alloc; 2680 2681 if (fec_enet_new_rxbdp(ndev, bdp, skb)) { 2682 dev_kfree_skb(skb); 2683 goto err_alloc; 2684 } 2685 2686 rxq->rx_skbuff[i] = skb; 2687 bdp->cbd_sc = BD_ENET_RX_EMPTY; 2688 2689 if (fep->bufdesc_ex) { 2690 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 2691 ebdp->cbd_esc = BD_ENET_RX_INT; 2692 } 2693 2694 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 2695 } 2696 2697 /* Set the last buffer to wrap. */ 2698 bdp = fec_enet_get_prevdesc(bdp, fep, queue); 2699 bdp->cbd_sc |= BD_SC_WRAP; 2700 return 0; 2701 2702 err_alloc: 2703 fec_enet_free_buffers(ndev); 2704 return -ENOMEM; 2705 } 2706 2707 static int 2708 fec_enet_alloc_txq_buffers(struct net_device *ndev, unsigned int queue) 2709 { 2710 struct fec_enet_private *fep = netdev_priv(ndev); 2711 unsigned int i; 2712 struct bufdesc *bdp; 2713 struct fec_enet_priv_tx_q *txq; 2714 2715 txq = fep->tx_queue[queue]; 2716 bdp = txq->tx_bd_base; 2717 for (i = 0; i < txq->tx_ring_size; i++) { 2718 txq->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL); 2719 if (!txq->tx_bounce[i]) 2720 goto err_alloc; 2721 2722 bdp->cbd_sc = 0; 2723 bdp->cbd_bufaddr = 0; 2724 2725 if (fep->bufdesc_ex) { 2726 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 2727 ebdp->cbd_esc = BD_ENET_TX_INT; 2728 } 2729 2730 bdp = fec_enet_get_nextdesc(bdp, fep, queue); 2731 } 2732 2733 /* Set the last buffer to wrap. */ 2734 bdp = fec_enet_get_prevdesc(bdp, fep, queue); 2735 bdp->cbd_sc |= BD_SC_WRAP; 2736 2737 return 0; 2738 2739 err_alloc: 2740 fec_enet_free_buffers(ndev); 2741 return -ENOMEM; 2742 } 2743 2744 static int fec_enet_alloc_buffers(struct net_device *ndev) 2745 { 2746 struct fec_enet_private *fep = netdev_priv(ndev); 2747 unsigned int i; 2748 2749 for (i = 0; i < fep->num_rx_queues; i++) 2750 if (fec_enet_alloc_rxq_buffers(ndev, i)) 2751 return -ENOMEM; 2752 2753 for (i = 0; i < fep->num_tx_queues; i++) 2754 if (fec_enet_alloc_txq_buffers(ndev, i)) 2755 return -ENOMEM; 2756 return 0; 2757 } 2758 2759 static int 2760 fec_enet_open(struct net_device *ndev) 2761 { 2762 struct fec_enet_private *fep = netdev_priv(ndev); 2763 int ret; 2764 2765 pinctrl_pm_select_default_state(&fep->pdev->dev); 2766 ret = fec_enet_clk_enable(ndev, true); 2767 if (ret) 2768 return ret; 2769 2770 /* I should reset the ring buffers here, but I don't yet know 2771 * a simple way to do that. 2772 */ 2773 2774 ret = fec_enet_alloc_buffers(ndev); 2775 if (ret) 2776 goto err_enet_alloc; 2777 2778 /* Probe and connect to PHY when open the interface */ 2779 ret = fec_enet_mii_probe(ndev); 2780 if (ret) 2781 goto err_enet_mii_probe; 2782 2783 fec_restart(ndev); 2784 napi_enable(&fep->napi); 2785 phy_start(fep->phy_dev); 2786 netif_tx_start_all_queues(ndev); 2787 2788 device_set_wakeup_enable(&ndev->dev, fep->wol_flag & 2789 FEC_WOL_FLAG_ENABLE); 2790 2791 return 0; 2792 2793 err_enet_mii_probe: 2794 fec_enet_free_buffers(ndev); 2795 err_enet_alloc: 2796 fec_enet_clk_enable(ndev, false); 2797 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 2798 return ret; 2799 } 2800 2801 static int 2802 fec_enet_close(struct net_device *ndev) 2803 { 2804 struct fec_enet_private *fep = netdev_priv(ndev); 2805 2806 phy_stop(fep->phy_dev); 2807 2808 if (netif_device_present(ndev)) { 2809 napi_disable(&fep->napi); 2810 netif_tx_disable(ndev); 2811 fec_stop(ndev); 2812 } 2813 2814 phy_disconnect(fep->phy_dev); 2815 fep->phy_dev = NULL; 2816 2817 fec_enet_clk_enable(ndev, false); 2818 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 2819 fec_enet_free_buffers(ndev); 2820 2821 return 0; 2822 } 2823 2824 /* Set or clear the multicast filter for this adaptor. 2825 * Skeleton taken from sunlance driver. 2826 * The CPM Ethernet implementation allows Multicast as well as individual 2827 * MAC address filtering. Some of the drivers check to make sure it is 2828 * a group multicast address, and discard those that are not. I guess I 2829 * will do the same for now, but just remove the test if you want 2830 * individual filtering as well (do the upper net layers want or support 2831 * this kind of feature?). 2832 */ 2833 2834 #define HASH_BITS 6 /* #bits in hash */ 2835 #define CRC32_POLY 0xEDB88320 2836 2837 static void set_multicast_list(struct net_device *ndev) 2838 { 2839 struct fec_enet_private *fep = netdev_priv(ndev); 2840 struct netdev_hw_addr *ha; 2841 unsigned int i, bit, data, crc, tmp; 2842 unsigned char hash; 2843 2844 if (ndev->flags & IFF_PROMISC) { 2845 tmp = readl(fep->hwp + FEC_R_CNTRL); 2846 tmp |= 0x8; 2847 writel(tmp, fep->hwp + FEC_R_CNTRL); 2848 return; 2849 } 2850 2851 tmp = readl(fep->hwp + FEC_R_CNTRL); 2852 tmp &= ~0x8; 2853 writel(tmp, fep->hwp + FEC_R_CNTRL); 2854 2855 if (ndev->flags & IFF_ALLMULTI) { 2856 /* Catch all multicast addresses, so set the 2857 * filter to all 1's 2858 */ 2859 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2860 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2861 2862 return; 2863 } 2864 2865 /* Clear filter and add the addresses in hash register 2866 */ 2867 writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2868 writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2869 2870 netdev_for_each_mc_addr(ha, ndev) { 2871 /* calculate crc32 value of mac address */ 2872 crc = 0xffffffff; 2873 2874 for (i = 0; i < ndev->addr_len; i++) { 2875 data = ha->addr[i]; 2876 for (bit = 0; bit < 8; bit++, data >>= 1) { 2877 crc = (crc >> 1) ^ 2878 (((crc ^ data) & 1) ? CRC32_POLY : 0); 2879 } 2880 } 2881 2882 /* only upper 6 bits (HASH_BITS) are used 2883 * which point to specific bit in he hash registers 2884 */ 2885 hash = (crc >> (32 - HASH_BITS)) & 0x3f; 2886 2887 if (hash > 31) { 2888 tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2889 tmp |= 1 << (hash - 32); 2890 writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 2891 } else { 2892 tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2893 tmp |= 1 << hash; 2894 writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 2895 } 2896 } 2897 } 2898 2899 /* Set a MAC change in hardware. */ 2900 static int 2901 fec_set_mac_address(struct net_device *ndev, void *p) 2902 { 2903 struct fec_enet_private *fep = netdev_priv(ndev); 2904 struct sockaddr *addr = p; 2905 2906 if (addr) { 2907 if (!is_valid_ether_addr(addr->sa_data)) 2908 return -EADDRNOTAVAIL; 2909 memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); 2910 } 2911 2912 writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) | 2913 (ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24), 2914 fep->hwp + FEC_ADDR_LOW); 2915 writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24), 2916 fep->hwp + FEC_ADDR_HIGH); 2917 return 0; 2918 } 2919 2920 #ifdef CONFIG_NET_POLL_CONTROLLER 2921 /** 2922 * fec_poll_controller - FEC Poll controller function 2923 * @dev: The FEC network adapter 2924 * 2925 * Polled functionality used by netconsole and others in non interrupt mode 2926 * 2927 */ 2928 static void fec_poll_controller(struct net_device *dev) 2929 { 2930 int i; 2931 struct fec_enet_private *fep = netdev_priv(dev); 2932 2933 for (i = 0; i < FEC_IRQ_NUM; i++) { 2934 if (fep->irq[i] > 0) { 2935 disable_irq(fep->irq[i]); 2936 fec_enet_interrupt(fep->irq[i], dev); 2937 enable_irq(fep->irq[i]); 2938 } 2939 } 2940 } 2941 #endif 2942 2943 #define FEATURES_NEED_QUIESCE NETIF_F_RXCSUM 2944 static inline void fec_enet_set_netdev_features(struct net_device *netdev, 2945 netdev_features_t features) 2946 { 2947 struct fec_enet_private *fep = netdev_priv(netdev); 2948 netdev_features_t changed = features ^ netdev->features; 2949 2950 netdev->features = features; 2951 2952 /* Receive checksum has been changed */ 2953 if (changed & NETIF_F_RXCSUM) { 2954 if (features & NETIF_F_RXCSUM) 2955 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 2956 else 2957 fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED; 2958 } 2959 } 2960 2961 static int fec_set_features(struct net_device *netdev, 2962 netdev_features_t features) 2963 { 2964 struct fec_enet_private *fep = netdev_priv(netdev); 2965 netdev_features_t changed = features ^ netdev->features; 2966 2967 if (netif_running(netdev) && changed & FEATURES_NEED_QUIESCE) { 2968 napi_disable(&fep->napi); 2969 netif_tx_lock_bh(netdev); 2970 fec_stop(netdev); 2971 fec_enet_set_netdev_features(netdev, features); 2972 fec_restart(netdev); 2973 netif_tx_wake_all_queues(netdev); 2974 netif_tx_unlock_bh(netdev); 2975 napi_enable(&fep->napi); 2976 } else { 2977 fec_enet_set_netdev_features(netdev, features); 2978 } 2979 2980 return 0; 2981 } 2982 2983 static const struct net_device_ops fec_netdev_ops = { 2984 .ndo_open = fec_enet_open, 2985 .ndo_stop = fec_enet_close, 2986 .ndo_start_xmit = fec_enet_start_xmit, 2987 .ndo_set_rx_mode = set_multicast_list, 2988 .ndo_change_mtu = eth_change_mtu, 2989 .ndo_validate_addr = eth_validate_addr, 2990 .ndo_tx_timeout = fec_timeout, 2991 .ndo_set_mac_address = fec_set_mac_address, 2992 .ndo_do_ioctl = fec_enet_ioctl, 2993 #ifdef CONFIG_NET_POLL_CONTROLLER 2994 .ndo_poll_controller = fec_poll_controller, 2995 #endif 2996 .ndo_set_features = fec_set_features, 2997 }; 2998 2999 /* 3000 * XXX: We need to clean up on failure exits here. 3001 * 3002 */ 3003 static int fec_enet_init(struct net_device *ndev) 3004 { 3005 struct fec_enet_private *fep = netdev_priv(ndev); 3006 struct fec_enet_priv_tx_q *txq; 3007 struct fec_enet_priv_rx_q *rxq; 3008 struct bufdesc *cbd_base; 3009 dma_addr_t bd_dma; 3010 int bd_size; 3011 unsigned int i; 3012 3013 #if defined(CONFIG_ARM) 3014 fep->rx_align = 0xf; 3015 fep->tx_align = 0xf; 3016 #else 3017 fep->rx_align = 0x3; 3018 fep->tx_align = 0x3; 3019 #endif 3020 3021 fec_enet_alloc_queue(ndev); 3022 3023 if (fep->bufdesc_ex) 3024 fep->bufdesc_size = sizeof(struct bufdesc_ex); 3025 else 3026 fep->bufdesc_size = sizeof(struct bufdesc); 3027 bd_size = (fep->total_tx_ring_size + fep->total_rx_ring_size) * 3028 fep->bufdesc_size; 3029 3030 /* Allocate memory for buffer descriptors. */ 3031 cbd_base = dma_alloc_coherent(NULL, bd_size, &bd_dma, 3032 GFP_KERNEL); 3033 if (!cbd_base) { 3034 return -ENOMEM; 3035 } 3036 3037 memset(cbd_base, 0, bd_size); 3038 3039 /* Get the Ethernet address */ 3040 fec_get_mac(ndev); 3041 /* make sure MAC we just acquired is programmed into the hw */ 3042 fec_set_mac_address(ndev, NULL); 3043 3044 /* Set receive and transmit descriptor base. */ 3045 for (i = 0; i < fep->num_rx_queues; i++) { 3046 rxq = fep->rx_queue[i]; 3047 rxq->index = i; 3048 rxq->rx_bd_base = (struct bufdesc *)cbd_base; 3049 rxq->bd_dma = bd_dma; 3050 if (fep->bufdesc_ex) { 3051 bd_dma += sizeof(struct bufdesc_ex) * rxq->rx_ring_size; 3052 cbd_base = (struct bufdesc *) 3053 (((struct bufdesc_ex *)cbd_base) + rxq->rx_ring_size); 3054 } else { 3055 bd_dma += sizeof(struct bufdesc) * rxq->rx_ring_size; 3056 cbd_base += rxq->rx_ring_size; 3057 } 3058 } 3059 3060 for (i = 0; i < fep->num_tx_queues; i++) { 3061 txq = fep->tx_queue[i]; 3062 txq->index = i; 3063 txq->tx_bd_base = (struct bufdesc *)cbd_base; 3064 txq->bd_dma = bd_dma; 3065 if (fep->bufdesc_ex) { 3066 bd_dma += sizeof(struct bufdesc_ex) * txq->tx_ring_size; 3067 cbd_base = (struct bufdesc *) 3068 (((struct bufdesc_ex *)cbd_base) + txq->tx_ring_size); 3069 } else { 3070 bd_dma += sizeof(struct bufdesc) * txq->tx_ring_size; 3071 cbd_base += txq->tx_ring_size; 3072 } 3073 } 3074 3075 3076 /* The FEC Ethernet specific entries in the device structure */ 3077 ndev->watchdog_timeo = TX_TIMEOUT; 3078 ndev->netdev_ops = &fec_netdev_ops; 3079 ndev->ethtool_ops = &fec_enet_ethtool_ops; 3080 3081 writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK); 3082 netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, NAPI_POLL_WEIGHT); 3083 3084 if (fep->quirks & FEC_QUIRK_HAS_VLAN) 3085 /* enable hw VLAN support */ 3086 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; 3087 3088 if (fep->quirks & FEC_QUIRK_HAS_CSUM) { 3089 ndev->gso_max_segs = FEC_MAX_TSO_SEGS; 3090 3091 /* enable hw accelerator */ 3092 ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM 3093 | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO); 3094 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 3095 } 3096 3097 if (fep->quirks & FEC_QUIRK_HAS_AVB) { 3098 fep->tx_align = 0; 3099 fep->rx_align = 0x3f; 3100 } 3101 3102 ndev->hw_features = ndev->features; 3103 3104 fec_restart(ndev); 3105 3106 return 0; 3107 } 3108 3109 #ifdef CONFIG_OF 3110 static void fec_reset_phy(struct platform_device *pdev) 3111 { 3112 int err, phy_reset; 3113 int msec = 1; 3114 struct device_node *np = pdev->dev.of_node; 3115 3116 if (!np) 3117 return; 3118 3119 of_property_read_u32(np, "phy-reset-duration", &msec); 3120 /* A sane reset duration should not be longer than 1s */ 3121 if (msec > 1000) 3122 msec = 1; 3123 3124 phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0); 3125 if (!gpio_is_valid(phy_reset)) 3126 return; 3127 3128 err = devm_gpio_request_one(&pdev->dev, phy_reset, 3129 GPIOF_OUT_INIT_LOW, "phy-reset"); 3130 if (err) { 3131 dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err); 3132 return; 3133 } 3134 msleep(msec); 3135 gpio_set_value(phy_reset, 1); 3136 } 3137 #else /* CONFIG_OF */ 3138 static void fec_reset_phy(struct platform_device *pdev) 3139 { 3140 /* 3141 * In case of platform probe, the reset has been done 3142 * by machine code. 3143 */ 3144 } 3145 #endif /* CONFIG_OF */ 3146 3147 static void 3148 fec_enet_get_queue_num(struct platform_device *pdev, int *num_tx, int *num_rx) 3149 { 3150 struct device_node *np = pdev->dev.of_node; 3151 int err; 3152 3153 *num_tx = *num_rx = 1; 3154 3155 if (!np || !of_device_is_available(np)) 3156 return; 3157 3158 /* parse the num of tx and rx queues */ 3159 err = of_property_read_u32(np, "fsl,num-tx-queues", num_tx); 3160 if (err) 3161 *num_tx = 1; 3162 3163 err = of_property_read_u32(np, "fsl,num-rx-queues", num_rx); 3164 if (err) 3165 *num_rx = 1; 3166 3167 if (*num_tx < 1 || *num_tx > FEC_ENET_MAX_TX_QS) { 3168 dev_warn(&pdev->dev, "Invalid num_tx(=%d), fall back to 1\n", 3169 *num_tx); 3170 *num_tx = 1; 3171 return; 3172 } 3173 3174 if (*num_rx < 1 || *num_rx > FEC_ENET_MAX_RX_QS) { 3175 dev_warn(&pdev->dev, "Invalid num_rx(=%d), fall back to 1\n", 3176 *num_rx); 3177 *num_rx = 1; 3178 return; 3179 } 3180 3181 } 3182 3183 static int 3184 fec_probe(struct platform_device *pdev) 3185 { 3186 struct fec_enet_private *fep; 3187 struct fec_platform_data *pdata; 3188 struct net_device *ndev; 3189 int i, irq, ret = 0; 3190 struct resource *r; 3191 const struct of_device_id *of_id; 3192 static int dev_id; 3193 struct device_node *np = pdev->dev.of_node, *phy_node; 3194 int num_tx_qs; 3195 int num_rx_qs; 3196 3197 fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs); 3198 3199 /* Init network device */ 3200 ndev = alloc_etherdev_mqs(sizeof(struct fec_enet_private), 3201 num_tx_qs, num_rx_qs); 3202 if (!ndev) 3203 return -ENOMEM; 3204 3205 SET_NETDEV_DEV(ndev, &pdev->dev); 3206 3207 /* setup board info structure */ 3208 fep = netdev_priv(ndev); 3209 3210 of_id = of_match_device(fec_dt_ids, &pdev->dev); 3211 if (of_id) 3212 pdev->id_entry = of_id->data; 3213 fep->quirks = pdev->id_entry->driver_data; 3214 3215 fep->netdev = ndev; 3216 fep->num_rx_queues = num_rx_qs; 3217 fep->num_tx_queues = num_tx_qs; 3218 3219 #if !defined(CONFIG_M5272) 3220 /* default enable pause frame auto negotiation */ 3221 if (fep->quirks & FEC_QUIRK_HAS_GBIT) 3222 fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG; 3223 #endif 3224 3225 /* Select default pin state */ 3226 pinctrl_pm_select_default_state(&pdev->dev); 3227 3228 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 3229 fep->hwp = devm_ioremap_resource(&pdev->dev, r); 3230 if (IS_ERR(fep->hwp)) { 3231 ret = PTR_ERR(fep->hwp); 3232 goto failed_ioremap; 3233 } 3234 3235 fep->pdev = pdev; 3236 fep->dev_id = dev_id++; 3237 3238 platform_set_drvdata(pdev, ndev); 3239 3240 if (of_get_property(np, "fsl,magic-packet", NULL)) 3241 fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET; 3242 3243 phy_node = of_parse_phandle(np, "phy-handle", 0); 3244 if (!phy_node && of_phy_is_fixed_link(np)) { 3245 ret = of_phy_register_fixed_link(np); 3246 if (ret < 0) { 3247 dev_err(&pdev->dev, 3248 "broken fixed-link specification\n"); 3249 goto failed_phy; 3250 } 3251 phy_node = of_node_get(np); 3252 } 3253 fep->phy_node = phy_node; 3254 3255 ret = of_get_phy_mode(pdev->dev.of_node); 3256 if (ret < 0) { 3257 pdata = dev_get_platdata(&pdev->dev); 3258 if (pdata) 3259 fep->phy_interface = pdata->phy; 3260 else 3261 fep->phy_interface = PHY_INTERFACE_MODE_MII; 3262 } else { 3263 fep->phy_interface = ret; 3264 } 3265 3266 fep->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 3267 if (IS_ERR(fep->clk_ipg)) { 3268 ret = PTR_ERR(fep->clk_ipg); 3269 goto failed_clk; 3270 } 3271 3272 fep->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); 3273 if (IS_ERR(fep->clk_ahb)) { 3274 ret = PTR_ERR(fep->clk_ahb); 3275 goto failed_clk; 3276 } 3277 3278 fep->itr_clk_rate = clk_get_rate(fep->clk_ahb); 3279 3280 /* enet_out is optional, depends on board */ 3281 fep->clk_enet_out = devm_clk_get(&pdev->dev, "enet_out"); 3282 if (IS_ERR(fep->clk_enet_out)) 3283 fep->clk_enet_out = NULL; 3284 3285 fep->ptp_clk_on = false; 3286 mutex_init(&fep->ptp_clk_mutex); 3287 3288 /* clk_ref is optional, depends on board */ 3289 fep->clk_ref = devm_clk_get(&pdev->dev, "enet_clk_ref"); 3290 if (IS_ERR(fep->clk_ref)) 3291 fep->clk_ref = NULL; 3292 3293 fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX; 3294 fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp"); 3295 if (IS_ERR(fep->clk_ptp)) { 3296 fep->clk_ptp = NULL; 3297 fep->bufdesc_ex = false; 3298 } 3299 3300 ret = fec_enet_clk_enable(ndev, true); 3301 if (ret) 3302 goto failed_clk; 3303 3304 fep->reg_phy = devm_regulator_get(&pdev->dev, "phy"); 3305 if (!IS_ERR(fep->reg_phy)) { 3306 ret = regulator_enable(fep->reg_phy); 3307 if (ret) { 3308 dev_err(&pdev->dev, 3309 "Failed to enable phy regulator: %d\n", ret); 3310 goto failed_regulator; 3311 } 3312 } else { 3313 fep->reg_phy = NULL; 3314 } 3315 3316 fec_reset_phy(pdev); 3317 3318 if (fep->bufdesc_ex) 3319 fec_ptp_init(pdev); 3320 3321 ret = fec_enet_init(ndev); 3322 if (ret) 3323 goto failed_init; 3324 3325 for (i = 0; i < FEC_IRQ_NUM; i++) { 3326 irq = platform_get_irq(pdev, i); 3327 if (irq < 0) { 3328 if (i) 3329 break; 3330 ret = irq; 3331 goto failed_irq; 3332 } 3333 ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt, 3334 0, pdev->name, ndev); 3335 if (ret) 3336 goto failed_irq; 3337 3338 fep->irq[i] = irq; 3339 } 3340 3341 init_completion(&fep->mdio_done); 3342 ret = fec_enet_mii_init(pdev); 3343 if (ret) 3344 goto failed_mii_init; 3345 3346 /* Carrier starts down, phylib will bring it up */ 3347 netif_carrier_off(ndev); 3348 fec_enet_clk_enable(ndev, false); 3349 pinctrl_pm_select_sleep_state(&pdev->dev); 3350 3351 ret = register_netdev(ndev); 3352 if (ret) 3353 goto failed_register; 3354 3355 device_init_wakeup(&ndev->dev, fep->wol_flag & 3356 FEC_WOL_HAS_MAGIC_PACKET); 3357 3358 if (fep->bufdesc_ex && fep->ptp_clock) 3359 netdev_info(ndev, "registered PHC device %d\n", fep->dev_id); 3360 3361 fep->rx_copybreak = COPYBREAK_DEFAULT; 3362 INIT_WORK(&fep->tx_timeout_work, fec_enet_timeout_work); 3363 return 0; 3364 3365 failed_register: 3366 fec_enet_mii_remove(fep); 3367 failed_mii_init: 3368 failed_irq: 3369 failed_init: 3370 if (fep->reg_phy) 3371 regulator_disable(fep->reg_phy); 3372 failed_regulator: 3373 fec_enet_clk_enable(ndev, false); 3374 failed_clk: 3375 failed_phy: 3376 of_node_put(phy_node); 3377 failed_ioremap: 3378 free_netdev(ndev); 3379 3380 return ret; 3381 } 3382 3383 static int 3384 fec_drv_remove(struct platform_device *pdev) 3385 { 3386 struct net_device *ndev = platform_get_drvdata(pdev); 3387 struct fec_enet_private *fep = netdev_priv(ndev); 3388 3389 cancel_delayed_work_sync(&fep->time_keep); 3390 cancel_work_sync(&fep->tx_timeout_work); 3391 unregister_netdev(ndev); 3392 fec_enet_mii_remove(fep); 3393 if (fep->reg_phy) 3394 regulator_disable(fep->reg_phy); 3395 if (fep->ptp_clock) 3396 ptp_clock_unregister(fep->ptp_clock); 3397 of_node_put(fep->phy_node); 3398 free_netdev(ndev); 3399 3400 return 0; 3401 } 3402 3403 static int __maybe_unused fec_suspend(struct device *dev) 3404 { 3405 struct net_device *ndev = dev_get_drvdata(dev); 3406 struct fec_enet_private *fep = netdev_priv(ndev); 3407 3408 rtnl_lock(); 3409 if (netif_running(ndev)) { 3410 if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) 3411 fep->wol_flag |= FEC_WOL_FLAG_SLEEP_ON; 3412 phy_stop(fep->phy_dev); 3413 napi_disable(&fep->napi); 3414 netif_tx_lock_bh(ndev); 3415 netif_device_detach(ndev); 3416 netif_tx_unlock_bh(ndev); 3417 fec_stop(ndev); 3418 fec_enet_clk_enable(ndev, false); 3419 if (!(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) 3420 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 3421 } 3422 rtnl_unlock(); 3423 3424 if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) 3425 regulator_disable(fep->reg_phy); 3426 3427 /* SOC supply clock to phy, when clock is disabled, phy link down 3428 * SOC control phy regulator, when regulator is disabled, phy link down 3429 */ 3430 if (fep->clk_enet_out || fep->reg_phy) 3431 fep->link = 0; 3432 3433 return 0; 3434 } 3435 3436 static int __maybe_unused fec_resume(struct device *dev) 3437 { 3438 struct net_device *ndev = dev_get_drvdata(dev); 3439 struct fec_enet_private *fep = netdev_priv(ndev); 3440 struct fec_platform_data *pdata = fep->pdev->dev.platform_data; 3441 int ret; 3442 int val; 3443 3444 if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) { 3445 ret = regulator_enable(fep->reg_phy); 3446 if (ret) 3447 return ret; 3448 } 3449 3450 rtnl_lock(); 3451 if (netif_running(ndev)) { 3452 ret = fec_enet_clk_enable(ndev, true); 3453 if (ret) { 3454 rtnl_unlock(); 3455 goto failed_clk; 3456 } 3457 if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) { 3458 if (pdata && pdata->sleep_mode_enable) 3459 pdata->sleep_mode_enable(false); 3460 val = readl(fep->hwp + FEC_ECNTRL); 3461 val &= ~(FEC_ECR_MAGICEN | FEC_ECR_SLEEP); 3462 writel(val, fep->hwp + FEC_ECNTRL); 3463 fep->wol_flag &= ~FEC_WOL_FLAG_SLEEP_ON; 3464 } else { 3465 pinctrl_pm_select_default_state(&fep->pdev->dev); 3466 } 3467 fec_restart(ndev); 3468 netif_tx_lock_bh(ndev); 3469 netif_device_attach(ndev); 3470 netif_tx_unlock_bh(ndev); 3471 napi_enable(&fep->napi); 3472 phy_start(fep->phy_dev); 3473 } 3474 rtnl_unlock(); 3475 3476 return 0; 3477 3478 failed_clk: 3479 if (fep->reg_phy) 3480 regulator_disable(fep->reg_phy); 3481 return ret; 3482 } 3483 3484 static SIMPLE_DEV_PM_OPS(fec_pm_ops, fec_suspend, fec_resume); 3485 3486 static struct platform_driver fec_driver = { 3487 .driver = { 3488 .name = DRIVER_NAME, 3489 .pm = &fec_pm_ops, 3490 .of_match_table = fec_dt_ids, 3491 }, 3492 .id_table = fec_devtype, 3493 .probe = fec_probe, 3494 .remove = fec_drv_remove, 3495 }; 3496 3497 module_platform_driver(fec_driver); 3498 3499 MODULE_ALIAS("platform:"DRIVER_NAME); 3500 MODULE_LICENSE("GPL"); 3501