1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx. 4 * Copyright (c) 1997 Dan Malek (dmalek@jlc.net) 5 * 6 * Right now, I am very wasteful with the buffers. I allocate memory 7 * pages and then divide them into 2K frame buffers. This way I know I 8 * have buffers large enough to hold one frame within one buffer descriptor. 9 * Once I get this working, I will use 64 or 128 byte CPM buffers, which 10 * will be much more memory efficient and will easily handle lots of 11 * small packets. 12 * 13 * Much better multiple PHY support by Magnus Damm. 14 * Copyright (c) 2000 Ericsson Radio Systems AB. 15 * 16 * Support for FEC controller of ColdFire processors. 17 * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com) 18 * 19 * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be) 20 * Copyright (c) 2004-2006 Macq Electronique SA. 21 * 22 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. 23 */ 24 25 #include <linux/module.h> 26 #include <linux/kernel.h> 27 #include <linux/string.h> 28 #include <linux/pm_runtime.h> 29 #include <linux/ptrace.h> 30 #include <linux/errno.h> 31 #include <linux/ioport.h> 32 #include <linux/slab.h> 33 #include <linux/interrupt.h> 34 #include <linux/delay.h> 35 #include <linux/netdevice.h> 36 #include <linux/etherdevice.h> 37 #include <linux/skbuff.h> 38 #include <linux/in.h> 39 #include <linux/ip.h> 40 #include <net/ip.h> 41 #include <net/page_pool/helpers.h> 42 #include <net/selftests.h> 43 #include <net/tso.h> 44 #include <linux/tcp.h> 45 #include <linux/udp.h> 46 #include <linux/icmp.h> 47 #include <linux/spinlock.h> 48 #include <linux/workqueue.h> 49 #include <linux/bitops.h> 50 #include <linux/io.h> 51 #include <linux/irq.h> 52 #include <linux/clk.h> 53 #include <linux/crc32.h> 54 #include <linux/platform_device.h> 55 #include <linux/property.h> 56 #include <linux/mdio.h> 57 #include <linux/phy.h> 58 #include <linux/fec.h> 59 #include <linux/of.h> 60 #include <linux/of_mdio.h> 61 #include <linux/of_net.h> 62 #include <linux/regulator/consumer.h> 63 #include <linux/if_vlan.h> 64 #include <linux/pinctrl/consumer.h> 65 #include <linux/gpio/consumer.h> 66 #include <linux/prefetch.h> 67 #include <linux/mfd/syscon.h> 68 #include <linux/regmap.h> 69 #include <soc/imx/cpuidle.h> 70 #include <linux/filter.h> 71 #include <linux/bpf.h> 72 #include <linux/bpf_trace.h> 73 74 #include <asm/cacheflush.h> 75 76 #include "fec.h" 77 78 static void set_multicast_list(struct net_device *ndev); 79 static void fec_enet_itr_coal_set(struct net_device *ndev); 80 static int fec_enet_xdp_tx_xmit(struct fec_enet_private *fep, 81 int cpu, struct xdp_buff *xdp, 82 u32 dma_sync_len); 83 84 #define DRIVER_NAME "fec" 85 86 static const u16 fec_enet_vlan_pri_to_queue[8] = {0, 0, 1, 1, 1, 2, 2, 2}; 87 88 #define FEC_ENET_RSEM_V 0x84 89 #define FEC_ENET_RSFL_V 16 90 #define FEC_ENET_RAEM_V 0x8 91 #define FEC_ENET_RAFL_V 0x8 92 #define FEC_ENET_OPD_V 0xFFF0 93 #define FEC_MDIO_PM_TIMEOUT 100 /* ms */ 94 95 #define FEC_ENET_XDP_PASS 0 96 #define FEC_ENET_XDP_CONSUMED BIT(0) 97 #define FEC_ENET_XDP_TX BIT(1) 98 #define FEC_ENET_XDP_REDIR BIT(2) 99 100 struct fec_devinfo { 101 u32 quirks; 102 }; 103 104 static const struct fec_devinfo fec_imx25_info = { 105 .quirks = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR | 106 FEC_QUIRK_HAS_FRREG | FEC_QUIRK_HAS_MDIO_C45, 107 }; 108 109 static const struct fec_devinfo fec_imx27_info = { 110 .quirks = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG | 111 FEC_QUIRK_HAS_MDIO_C45, 112 }; 113 114 static const struct fec_devinfo fec_imx28_info = { 115 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME | 116 FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC | 117 FEC_QUIRK_HAS_FRREG | FEC_QUIRK_CLEAR_SETUP_MII | 118 FEC_QUIRK_NO_HARD_RESET | FEC_QUIRK_HAS_MDIO_C45, 119 }; 120 121 static const struct fec_devinfo fec_imx6q_info = { 122 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 123 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 124 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 | 125 FEC_QUIRK_HAS_RACC | FEC_QUIRK_CLEAR_SETUP_MII | 126 FEC_QUIRK_HAS_PMQOS | FEC_QUIRK_HAS_MDIO_C45, 127 }; 128 129 static const struct fec_devinfo fec_mvf600_info = { 130 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC | 131 FEC_QUIRK_HAS_MDIO_C45, 132 }; 133 134 static const struct fec_devinfo fec_imx6x_info = { 135 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 136 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 137 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB | 138 FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE | 139 FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE | 140 FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES | 141 FEC_QUIRK_HAS_MDIO_C45, 142 }; 143 144 static const struct fec_devinfo fec_imx6ul_info = { 145 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 146 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 147 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR007885 | 148 FEC_QUIRK_BUG_CAPTURE | FEC_QUIRK_HAS_RACC | 149 FEC_QUIRK_HAS_COALESCE | FEC_QUIRK_CLEAR_SETUP_MII | 150 FEC_QUIRK_HAS_MDIO_C45, 151 }; 152 153 static const struct fec_devinfo fec_imx8mq_info = { 154 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 155 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 156 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB | 157 FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE | 158 FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE | 159 FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES | 160 FEC_QUIRK_HAS_EEE | FEC_QUIRK_WAKEUP_FROM_INT2 | 161 FEC_QUIRK_HAS_MDIO_C45, 162 }; 163 164 static const struct fec_devinfo fec_imx8qm_info = { 165 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 166 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 167 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB | 168 FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE | 169 FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE | 170 FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES | 171 FEC_QUIRK_DELAYED_CLKS_SUPPORT | FEC_QUIRK_HAS_MDIO_C45, 172 }; 173 174 static const struct fec_devinfo fec_s32v234_info = { 175 .quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT | 176 FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM | 177 FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB | 178 FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE | 179 FEC_QUIRK_HAS_MDIO_C45, 180 }; 181 182 static struct platform_device_id fec_devtype[] = { 183 { 184 /* keep it for coldfire */ 185 .name = DRIVER_NAME, 186 .driver_data = 0, 187 }, { 188 /* sentinel */ 189 } 190 }; 191 MODULE_DEVICE_TABLE(platform, fec_devtype); 192 193 static const struct of_device_id fec_dt_ids[] = { 194 { .compatible = "fsl,imx25-fec", .data = &fec_imx25_info, }, 195 { .compatible = "fsl,imx27-fec", .data = &fec_imx27_info, }, 196 { .compatible = "fsl,imx28-fec", .data = &fec_imx28_info, }, 197 { .compatible = "fsl,imx6q-fec", .data = &fec_imx6q_info, }, 198 { .compatible = "fsl,mvf600-fec", .data = &fec_mvf600_info, }, 199 { .compatible = "fsl,imx6sx-fec", .data = &fec_imx6x_info, }, 200 { .compatible = "fsl,imx6ul-fec", .data = &fec_imx6ul_info, }, 201 { .compatible = "fsl,imx8mq-fec", .data = &fec_imx8mq_info, }, 202 { .compatible = "fsl,imx8qm-fec", .data = &fec_imx8qm_info, }, 203 { .compatible = "fsl,s32v234-fec", .data = &fec_s32v234_info, }, 204 { /* sentinel */ } 205 }; 206 MODULE_DEVICE_TABLE(of, fec_dt_ids); 207 208 static unsigned char macaddr[ETH_ALEN]; 209 module_param_array(macaddr, byte, NULL, 0); 210 MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); 211 212 #if defined(CONFIG_M5272) 213 /* 214 * Some hardware gets it MAC address out of local flash memory. 215 * if this is non-zero then assume it is the address to get MAC from. 216 */ 217 #if defined(CONFIG_NETtel) 218 #define FEC_FLASHMAC 0xf0006006 219 #elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES) 220 #define FEC_FLASHMAC 0xf0006000 221 #elif defined(CONFIG_CANCam) 222 #define FEC_FLASHMAC 0xf0020000 223 #elif defined (CONFIG_M5272C3) 224 #define FEC_FLASHMAC (0xffe04000 + 4) 225 #elif defined(CONFIG_MOD5272) 226 #define FEC_FLASHMAC 0xffc0406b 227 #else 228 #define FEC_FLASHMAC 0 229 #endif 230 #endif /* CONFIG_M5272 */ 231 232 /* The FEC stores dest/src/type/vlan, data, and checksum for receive packets. 233 * 234 * 2048 byte skbufs are allocated. However, alignment requirements 235 * varies between FEC variants. Worst case is 64, so round down by 64. 236 */ 237 #define PKT_MAXBUF_SIZE (round_down(2048 - 64, 64)) 238 #define PKT_MINBUF_SIZE 64 239 240 /* FEC receive acceleration */ 241 #define FEC_RACC_IPDIS BIT(1) 242 #define FEC_RACC_PRODIS BIT(2) 243 #define FEC_RACC_SHIFT16 BIT(7) 244 #define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS) 245 246 /* MIB Control Register */ 247 #define FEC_MIB_CTRLSTAT_DISABLE BIT(31) 248 249 /* 250 * The 5270/5271/5280/5282/532x RX control register also contains maximum frame 251 * size bits. Other FEC hardware does not, so we need to take that into 252 * account when setting it. 253 */ 254 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ 255 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \ 256 defined(CONFIG_ARM64) 257 #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16) 258 #else 259 #define OPT_FRAME_SIZE 0 260 #endif 261 262 /* FEC MII MMFR bits definition */ 263 #define FEC_MMFR_ST (1 << 30) 264 #define FEC_MMFR_ST_C45 (0) 265 #define FEC_MMFR_OP_READ (2 << 28) 266 #define FEC_MMFR_OP_READ_C45 (3 << 28) 267 #define FEC_MMFR_OP_WRITE (1 << 28) 268 #define FEC_MMFR_OP_ADDR_WRITE (0) 269 #define FEC_MMFR_PA(v) ((v & 0x1f) << 23) 270 #define FEC_MMFR_RA(v) ((v & 0x1f) << 18) 271 #define FEC_MMFR_TA (2 << 16) 272 #define FEC_MMFR_DATA(v) (v & 0xffff) 273 /* FEC ECR bits definition */ 274 #define FEC_ECR_RESET BIT(0) 275 #define FEC_ECR_ETHEREN BIT(1) 276 #define FEC_ECR_MAGICEN BIT(2) 277 #define FEC_ECR_SLEEP BIT(3) 278 #define FEC_ECR_EN1588 BIT(4) 279 #define FEC_ECR_BYTESWP BIT(8) 280 /* FEC RCR bits definition */ 281 #define FEC_RCR_LOOP BIT(0) 282 #define FEC_RCR_HALFDPX BIT(1) 283 #define FEC_RCR_MII BIT(2) 284 #define FEC_RCR_PROMISC BIT(3) 285 #define FEC_RCR_BC_REJ BIT(4) 286 #define FEC_RCR_FLOWCTL BIT(5) 287 #define FEC_RCR_RMII BIT(8) 288 #define FEC_RCR_10BASET BIT(9) 289 /* TX WMARK bits */ 290 #define FEC_TXWMRK_STRFWD BIT(8) 291 292 #define FEC_MII_TIMEOUT 30000 /* us */ 293 294 /* Transmitter timeout */ 295 #define TX_TIMEOUT (2 * HZ) 296 297 #define FEC_PAUSE_FLAG_AUTONEG 0x1 298 #define FEC_PAUSE_FLAG_ENABLE 0x2 299 #define FEC_WOL_HAS_MAGIC_PACKET (0x1 << 0) 300 #define FEC_WOL_FLAG_ENABLE (0x1 << 1) 301 #define FEC_WOL_FLAG_SLEEP_ON (0x1 << 2) 302 303 /* Max number of allowed TCP segments for software TSO */ 304 #define FEC_MAX_TSO_SEGS 100 305 #define FEC_MAX_SKB_DESCS (FEC_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS) 306 307 #define IS_TSO_HEADER(txq, addr) \ 308 ((addr >= txq->tso_hdrs_dma) && \ 309 (addr < txq->tso_hdrs_dma + txq->bd.ring_size * TSO_HEADER_SIZE)) 310 311 static int mii_cnt; 312 313 static struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp, 314 struct bufdesc_prop *bd) 315 { 316 return (bdp >= bd->last) ? bd->base 317 : (struct bufdesc *)(((void *)bdp) + bd->dsize); 318 } 319 320 static struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp, 321 struct bufdesc_prop *bd) 322 { 323 return (bdp <= bd->base) ? bd->last 324 : (struct bufdesc *)(((void *)bdp) - bd->dsize); 325 } 326 327 static int fec_enet_get_bd_index(struct bufdesc *bdp, 328 struct bufdesc_prop *bd) 329 { 330 return ((const char *)bdp - (const char *)bd->base) >> bd->dsize_log2; 331 } 332 333 static int fec_enet_get_free_txdesc_num(struct fec_enet_priv_tx_q *txq) 334 { 335 int entries; 336 337 entries = (((const char *)txq->dirty_tx - 338 (const char *)txq->bd.cur) >> txq->bd.dsize_log2) - 1; 339 340 return entries >= 0 ? entries : entries + txq->bd.ring_size; 341 } 342 343 static void swap_buffer(void *bufaddr, int len) 344 { 345 int i; 346 unsigned int *buf = bufaddr; 347 348 for (i = 0; i < len; i += 4, buf++) 349 swab32s(buf); 350 } 351 352 static void fec_dump(struct net_device *ndev) 353 { 354 struct fec_enet_private *fep = netdev_priv(ndev); 355 struct bufdesc *bdp; 356 struct fec_enet_priv_tx_q *txq; 357 int index = 0; 358 359 netdev_info(ndev, "TX ring dump\n"); 360 pr_info("Nr SC addr len SKB\n"); 361 362 txq = fep->tx_queue[0]; 363 bdp = txq->bd.base; 364 365 do { 366 pr_info("%3u %c%c 0x%04x 0x%08x %4u %p\n", 367 index, 368 bdp == txq->bd.cur ? 'S' : ' ', 369 bdp == txq->dirty_tx ? 'H' : ' ', 370 fec16_to_cpu(bdp->cbd_sc), 371 fec32_to_cpu(bdp->cbd_bufaddr), 372 fec16_to_cpu(bdp->cbd_datlen), 373 txq->tx_buf[index].buf_p); 374 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 375 index++; 376 } while (bdp != txq->bd.base); 377 } 378 379 /* 380 * Coldfire does not support DMA coherent allocations, and has historically used 381 * a band-aid with a manual flush in fec_enet_rx_queue. 382 */ 383 #if defined(CONFIG_COLDFIRE) && !defined(CONFIG_COLDFIRE_COHERENT_DMA) 384 static void *fec_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, 385 gfp_t gfp) 386 { 387 return dma_alloc_noncoherent(dev, size, handle, DMA_BIDIRECTIONAL, gfp); 388 } 389 390 static void fec_dma_free(struct device *dev, size_t size, void *cpu_addr, 391 dma_addr_t handle) 392 { 393 dma_free_noncoherent(dev, size, cpu_addr, handle, DMA_BIDIRECTIONAL); 394 } 395 #else /* !CONFIG_COLDFIRE || CONFIG_COLDFIRE_COHERENT_DMA */ 396 static void *fec_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, 397 gfp_t gfp) 398 { 399 return dma_alloc_coherent(dev, size, handle, gfp); 400 } 401 402 static void fec_dma_free(struct device *dev, size_t size, void *cpu_addr, 403 dma_addr_t handle) 404 { 405 dma_free_coherent(dev, size, cpu_addr, handle); 406 } 407 #endif /* !CONFIG_COLDFIRE || CONFIG_COLDFIRE_COHERENT_DMA */ 408 409 struct fec_dma_devres { 410 size_t size; 411 void *vaddr; 412 dma_addr_t dma_handle; 413 }; 414 415 static void fec_dmam_release(struct device *dev, void *res) 416 { 417 struct fec_dma_devres *this = res; 418 419 fec_dma_free(dev, this->size, this->vaddr, this->dma_handle); 420 } 421 422 static void *fec_dmam_alloc(struct device *dev, size_t size, dma_addr_t *handle, 423 gfp_t gfp) 424 { 425 struct fec_dma_devres *dr; 426 void *vaddr; 427 428 dr = devres_alloc(fec_dmam_release, sizeof(*dr), gfp); 429 if (!dr) 430 return NULL; 431 vaddr = fec_dma_alloc(dev, size, handle, gfp); 432 if (!vaddr) { 433 devres_free(dr); 434 return NULL; 435 } 436 dr->vaddr = vaddr; 437 dr->dma_handle = *handle; 438 dr->size = size; 439 devres_add(dev, dr); 440 return vaddr; 441 } 442 443 static inline bool is_ipv4_pkt(struct sk_buff *skb) 444 { 445 return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4; 446 } 447 448 static int 449 fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev) 450 { 451 /* Only run for packets requiring a checksum. */ 452 if (skb->ip_summed != CHECKSUM_PARTIAL) 453 return 0; 454 455 if (unlikely(skb_cow_head(skb, 0))) 456 return -1; 457 458 if (is_ipv4_pkt(skb)) 459 ip_hdr(skb)->check = 0; 460 *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0; 461 462 return 0; 463 } 464 465 static int 466 fec_enet_create_page_pool(struct fec_enet_private *fep, 467 struct fec_enet_priv_rx_q *rxq, int size) 468 { 469 struct bpf_prog *xdp_prog = READ_ONCE(fep->xdp_prog); 470 struct page_pool_params pp_params = { 471 .order = 0, 472 .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV, 473 .pool_size = size, 474 .nid = dev_to_node(&fep->pdev->dev), 475 .dev = &fep->pdev->dev, 476 .dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE, 477 .offset = FEC_ENET_XDP_HEADROOM, 478 .max_len = FEC_ENET_RX_FRSIZE, 479 }; 480 int err; 481 482 rxq->page_pool = page_pool_create(&pp_params); 483 if (IS_ERR(rxq->page_pool)) { 484 err = PTR_ERR(rxq->page_pool); 485 rxq->page_pool = NULL; 486 return err; 487 } 488 489 err = xdp_rxq_info_reg(&rxq->xdp_rxq, fep->netdev, rxq->id, 0); 490 if (err < 0) 491 goto err_free_pp; 492 493 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL, 494 rxq->page_pool); 495 if (err) 496 goto err_unregister_rxq; 497 498 return 0; 499 500 err_unregister_rxq: 501 xdp_rxq_info_unreg(&rxq->xdp_rxq); 502 err_free_pp: 503 page_pool_destroy(rxq->page_pool); 504 rxq->page_pool = NULL; 505 return err; 506 } 507 508 static struct bufdesc * 509 fec_enet_txq_submit_frag_skb(struct fec_enet_priv_tx_q *txq, 510 struct sk_buff *skb, 511 struct net_device *ndev) 512 { 513 struct fec_enet_private *fep = netdev_priv(ndev); 514 struct bufdesc *bdp = txq->bd.cur; 515 struct bufdesc_ex *ebdp; 516 int nr_frags = skb_shinfo(skb)->nr_frags; 517 int frag, frag_len; 518 unsigned short status; 519 unsigned int estatus = 0; 520 skb_frag_t *this_frag; 521 unsigned int index; 522 void *bufaddr; 523 dma_addr_t addr; 524 int i; 525 526 for (frag = 0; frag < nr_frags; frag++) { 527 this_frag = &skb_shinfo(skb)->frags[frag]; 528 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 529 ebdp = (struct bufdesc_ex *)bdp; 530 531 status = fec16_to_cpu(bdp->cbd_sc); 532 status &= ~BD_ENET_TX_STATS; 533 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 534 frag_len = skb_frag_size(&skb_shinfo(skb)->frags[frag]); 535 536 /* Handle the last BD specially */ 537 if (frag == nr_frags - 1) { 538 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 539 if (fep->bufdesc_ex) { 540 estatus |= BD_ENET_TX_INT; 541 if (unlikely(skb_shinfo(skb)->tx_flags & 542 SKBTX_HW_TSTAMP && fep->hwts_tx_en)) 543 estatus |= BD_ENET_TX_TS; 544 } 545 } 546 547 if (fep->bufdesc_ex) { 548 if (fep->quirks & FEC_QUIRK_HAS_AVB) 549 estatus |= FEC_TX_BD_FTYPE(txq->bd.qid); 550 if (skb->ip_summed == CHECKSUM_PARTIAL) 551 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 552 553 ebdp->cbd_bdu = 0; 554 ebdp->cbd_esc = cpu_to_fec32(estatus); 555 } 556 557 bufaddr = skb_frag_address(this_frag); 558 559 index = fec_enet_get_bd_index(bdp, &txq->bd); 560 if (((unsigned long) bufaddr) & fep->tx_align || 561 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 562 memcpy(txq->tx_bounce[index], bufaddr, frag_len); 563 bufaddr = txq->tx_bounce[index]; 564 565 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 566 swap_buffer(bufaddr, frag_len); 567 } 568 569 addr = dma_map_single(&fep->pdev->dev, bufaddr, frag_len, 570 DMA_TO_DEVICE); 571 if (dma_mapping_error(&fep->pdev->dev, addr)) { 572 if (net_ratelimit()) 573 netdev_err(ndev, "Tx DMA memory map failed\n"); 574 goto dma_mapping_error; 575 } 576 577 bdp->cbd_bufaddr = cpu_to_fec32(addr); 578 bdp->cbd_datlen = cpu_to_fec16(frag_len); 579 /* Make sure the updates to rest of the descriptor are 580 * performed before transferring ownership. 581 */ 582 wmb(); 583 bdp->cbd_sc = cpu_to_fec16(status); 584 } 585 586 return bdp; 587 dma_mapping_error: 588 bdp = txq->bd.cur; 589 for (i = 0; i < frag; i++) { 590 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 591 dma_unmap_single(&fep->pdev->dev, fec32_to_cpu(bdp->cbd_bufaddr), 592 fec16_to_cpu(bdp->cbd_datlen), DMA_TO_DEVICE); 593 } 594 return ERR_PTR(-ENOMEM); 595 } 596 597 static int fec_enet_txq_submit_skb(struct fec_enet_priv_tx_q *txq, 598 struct sk_buff *skb, struct net_device *ndev) 599 { 600 struct fec_enet_private *fep = netdev_priv(ndev); 601 int nr_frags = skb_shinfo(skb)->nr_frags; 602 struct bufdesc *bdp, *last_bdp; 603 void *bufaddr; 604 dma_addr_t addr; 605 unsigned short status; 606 unsigned short buflen; 607 unsigned int estatus = 0; 608 unsigned int index; 609 int entries_free; 610 611 entries_free = fec_enet_get_free_txdesc_num(txq); 612 if (entries_free < MAX_SKB_FRAGS + 1) { 613 dev_kfree_skb_any(skb); 614 if (net_ratelimit()) 615 netdev_err(ndev, "NOT enough BD for SG!\n"); 616 return NETDEV_TX_OK; 617 } 618 619 /* Protocol checksum off-load for TCP and UDP. */ 620 if (fec_enet_clear_csum(skb, ndev)) { 621 dev_kfree_skb_any(skb); 622 return NETDEV_TX_OK; 623 } 624 625 /* Fill in a Tx ring entry */ 626 bdp = txq->bd.cur; 627 last_bdp = bdp; 628 status = fec16_to_cpu(bdp->cbd_sc); 629 status &= ~BD_ENET_TX_STATS; 630 631 /* Set buffer length and buffer pointer */ 632 bufaddr = skb->data; 633 buflen = skb_headlen(skb); 634 635 index = fec_enet_get_bd_index(bdp, &txq->bd); 636 if (((unsigned long) bufaddr) & fep->tx_align || 637 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 638 memcpy(txq->tx_bounce[index], skb->data, buflen); 639 bufaddr = txq->tx_bounce[index]; 640 641 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 642 swap_buffer(bufaddr, buflen); 643 } 644 645 /* Push the data cache so the CPM does not get stale memory data. */ 646 addr = dma_map_single(&fep->pdev->dev, bufaddr, buflen, DMA_TO_DEVICE); 647 if (dma_mapping_error(&fep->pdev->dev, addr)) { 648 dev_kfree_skb_any(skb); 649 if (net_ratelimit()) 650 netdev_err(ndev, "Tx DMA memory map failed\n"); 651 return NETDEV_TX_OK; 652 } 653 654 if (nr_frags) { 655 last_bdp = fec_enet_txq_submit_frag_skb(txq, skb, ndev); 656 if (IS_ERR(last_bdp)) { 657 dma_unmap_single(&fep->pdev->dev, addr, 658 buflen, DMA_TO_DEVICE); 659 dev_kfree_skb_any(skb); 660 return NETDEV_TX_OK; 661 } 662 } else { 663 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 664 if (fep->bufdesc_ex) { 665 estatus = BD_ENET_TX_INT; 666 if (unlikely(skb_shinfo(skb)->tx_flags & 667 SKBTX_HW_TSTAMP && fep->hwts_tx_en)) 668 estatus |= BD_ENET_TX_TS; 669 } 670 } 671 bdp->cbd_bufaddr = cpu_to_fec32(addr); 672 bdp->cbd_datlen = cpu_to_fec16(buflen); 673 674 if (fep->bufdesc_ex) { 675 676 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 677 678 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 679 fep->hwts_tx_en)) 680 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 681 682 if (fep->quirks & FEC_QUIRK_HAS_AVB) 683 estatus |= FEC_TX_BD_FTYPE(txq->bd.qid); 684 685 if (skb->ip_summed == CHECKSUM_PARTIAL) 686 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 687 688 ebdp->cbd_bdu = 0; 689 ebdp->cbd_esc = cpu_to_fec32(estatus); 690 } 691 692 index = fec_enet_get_bd_index(last_bdp, &txq->bd); 693 /* Save skb pointer */ 694 txq->tx_buf[index].buf_p = skb; 695 696 /* Make sure the updates to rest of the descriptor are performed before 697 * transferring ownership. 698 */ 699 wmb(); 700 701 /* Send it on its way. Tell FEC it's ready, interrupt when done, 702 * it's the last BD of the frame, and to put the CRC on the end. 703 */ 704 status |= (BD_ENET_TX_READY | BD_ENET_TX_TC); 705 bdp->cbd_sc = cpu_to_fec16(status); 706 707 /* If this was the last BD in the ring, start at the beginning again. */ 708 bdp = fec_enet_get_nextdesc(last_bdp, &txq->bd); 709 710 skb_tx_timestamp(skb); 711 712 /* Make sure the update to bdp is performed before txq->bd.cur. */ 713 wmb(); 714 txq->bd.cur = bdp; 715 716 /* Trigger transmission start */ 717 writel(0, txq->bd.reg_desc_active); 718 719 return 0; 720 } 721 722 static int 723 fec_enet_txq_put_data_tso(struct fec_enet_priv_tx_q *txq, struct sk_buff *skb, 724 struct net_device *ndev, 725 struct bufdesc *bdp, int index, char *data, 726 int size, bool last_tcp, bool is_last) 727 { 728 struct fec_enet_private *fep = netdev_priv(ndev); 729 struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc); 730 unsigned short status; 731 unsigned int estatus = 0; 732 dma_addr_t addr; 733 734 status = fec16_to_cpu(bdp->cbd_sc); 735 status &= ~BD_ENET_TX_STATS; 736 737 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 738 739 if (((unsigned long) data) & fep->tx_align || 740 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 741 memcpy(txq->tx_bounce[index], data, size); 742 data = txq->tx_bounce[index]; 743 744 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 745 swap_buffer(data, size); 746 } 747 748 addr = dma_map_single(&fep->pdev->dev, data, size, DMA_TO_DEVICE); 749 if (dma_mapping_error(&fep->pdev->dev, addr)) { 750 dev_kfree_skb_any(skb); 751 if (net_ratelimit()) 752 netdev_err(ndev, "Tx DMA memory map failed\n"); 753 return NETDEV_TX_OK; 754 } 755 756 bdp->cbd_datlen = cpu_to_fec16(size); 757 bdp->cbd_bufaddr = cpu_to_fec32(addr); 758 759 if (fep->bufdesc_ex) { 760 if (fep->quirks & FEC_QUIRK_HAS_AVB) 761 estatus |= FEC_TX_BD_FTYPE(txq->bd.qid); 762 if (skb->ip_summed == CHECKSUM_PARTIAL) 763 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 764 ebdp->cbd_bdu = 0; 765 ebdp->cbd_esc = cpu_to_fec32(estatus); 766 } 767 768 /* Handle the last BD specially */ 769 if (last_tcp) 770 status |= (BD_ENET_TX_LAST | BD_ENET_TX_TC); 771 if (is_last) { 772 status |= BD_ENET_TX_INTR; 773 if (fep->bufdesc_ex) 774 ebdp->cbd_esc |= cpu_to_fec32(BD_ENET_TX_INT); 775 } 776 777 bdp->cbd_sc = cpu_to_fec16(status); 778 779 return 0; 780 } 781 782 static int 783 fec_enet_txq_put_hdr_tso(struct fec_enet_priv_tx_q *txq, 784 struct sk_buff *skb, struct net_device *ndev, 785 struct bufdesc *bdp, int index) 786 { 787 struct fec_enet_private *fep = netdev_priv(ndev); 788 int hdr_len = skb_tcp_all_headers(skb); 789 struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc); 790 void *bufaddr; 791 unsigned long dmabuf; 792 unsigned short status; 793 unsigned int estatus = 0; 794 795 status = fec16_to_cpu(bdp->cbd_sc); 796 status &= ~BD_ENET_TX_STATS; 797 status |= (BD_ENET_TX_TC | BD_ENET_TX_READY); 798 799 bufaddr = txq->tso_hdrs + index * TSO_HEADER_SIZE; 800 dmabuf = txq->tso_hdrs_dma + index * TSO_HEADER_SIZE; 801 if (((unsigned long)bufaddr) & fep->tx_align || 802 fep->quirks & FEC_QUIRK_SWAP_FRAME) { 803 memcpy(txq->tx_bounce[index], skb->data, hdr_len); 804 bufaddr = txq->tx_bounce[index]; 805 806 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 807 swap_buffer(bufaddr, hdr_len); 808 809 dmabuf = dma_map_single(&fep->pdev->dev, bufaddr, 810 hdr_len, DMA_TO_DEVICE); 811 if (dma_mapping_error(&fep->pdev->dev, dmabuf)) { 812 dev_kfree_skb_any(skb); 813 if (net_ratelimit()) 814 netdev_err(ndev, "Tx DMA memory map failed\n"); 815 return NETDEV_TX_OK; 816 } 817 } 818 819 bdp->cbd_bufaddr = cpu_to_fec32(dmabuf); 820 bdp->cbd_datlen = cpu_to_fec16(hdr_len); 821 822 if (fep->bufdesc_ex) { 823 if (fep->quirks & FEC_QUIRK_HAS_AVB) 824 estatus |= FEC_TX_BD_FTYPE(txq->bd.qid); 825 if (skb->ip_summed == CHECKSUM_PARTIAL) 826 estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; 827 ebdp->cbd_bdu = 0; 828 ebdp->cbd_esc = cpu_to_fec32(estatus); 829 } 830 831 bdp->cbd_sc = cpu_to_fec16(status); 832 833 return 0; 834 } 835 836 static int fec_enet_txq_submit_tso(struct fec_enet_priv_tx_q *txq, 837 struct sk_buff *skb, 838 struct net_device *ndev) 839 { 840 struct fec_enet_private *fep = netdev_priv(ndev); 841 int hdr_len, total_len, data_left; 842 struct bufdesc *bdp = txq->bd.cur; 843 struct tso_t tso; 844 unsigned int index = 0; 845 int ret; 846 847 if (tso_count_descs(skb) >= fec_enet_get_free_txdesc_num(txq)) { 848 dev_kfree_skb_any(skb); 849 if (net_ratelimit()) 850 netdev_err(ndev, "NOT enough BD for TSO!\n"); 851 return NETDEV_TX_OK; 852 } 853 854 /* Protocol checksum off-load for TCP and UDP. */ 855 if (fec_enet_clear_csum(skb, ndev)) { 856 dev_kfree_skb_any(skb); 857 return NETDEV_TX_OK; 858 } 859 860 /* Initialize the TSO handler, and prepare the first payload */ 861 hdr_len = tso_start(skb, &tso); 862 863 total_len = skb->len - hdr_len; 864 while (total_len > 0) { 865 char *hdr; 866 867 index = fec_enet_get_bd_index(bdp, &txq->bd); 868 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len); 869 total_len -= data_left; 870 871 /* prepare packet headers: MAC + IP + TCP */ 872 hdr = txq->tso_hdrs + index * TSO_HEADER_SIZE; 873 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0); 874 ret = fec_enet_txq_put_hdr_tso(txq, skb, ndev, bdp, index); 875 if (ret) 876 goto err_release; 877 878 while (data_left > 0) { 879 int size; 880 881 size = min_t(int, tso.size, data_left); 882 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 883 index = fec_enet_get_bd_index(bdp, &txq->bd); 884 ret = fec_enet_txq_put_data_tso(txq, skb, ndev, 885 bdp, index, 886 tso.data, size, 887 size == data_left, 888 total_len == 0); 889 if (ret) 890 goto err_release; 891 892 data_left -= size; 893 tso_build_data(skb, &tso, size); 894 } 895 896 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 897 } 898 899 /* Save skb pointer */ 900 txq->tx_buf[index].buf_p = skb; 901 902 skb_tx_timestamp(skb); 903 txq->bd.cur = bdp; 904 905 /* Trigger transmission start */ 906 if (!(fep->quirks & FEC_QUIRK_ERR007885) || 907 !readl(txq->bd.reg_desc_active) || 908 !readl(txq->bd.reg_desc_active) || 909 !readl(txq->bd.reg_desc_active) || 910 !readl(txq->bd.reg_desc_active)) 911 writel(0, txq->bd.reg_desc_active); 912 913 return 0; 914 915 err_release: 916 /* TODO: Release all used data descriptors for TSO */ 917 return ret; 918 } 919 920 static netdev_tx_t 921 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev) 922 { 923 struct fec_enet_private *fep = netdev_priv(ndev); 924 int entries_free; 925 unsigned short queue; 926 struct fec_enet_priv_tx_q *txq; 927 struct netdev_queue *nq; 928 int ret; 929 930 queue = skb_get_queue_mapping(skb); 931 txq = fep->tx_queue[queue]; 932 nq = netdev_get_tx_queue(ndev, queue); 933 934 if (skb_is_gso(skb)) 935 ret = fec_enet_txq_submit_tso(txq, skb, ndev); 936 else 937 ret = fec_enet_txq_submit_skb(txq, skb, ndev); 938 if (ret) 939 return ret; 940 941 entries_free = fec_enet_get_free_txdesc_num(txq); 942 if (entries_free <= txq->tx_stop_threshold) 943 netif_tx_stop_queue(nq); 944 945 return NETDEV_TX_OK; 946 } 947 948 /* Init RX & TX buffer descriptors 949 */ 950 static void fec_enet_bd_init(struct net_device *dev) 951 { 952 struct fec_enet_private *fep = netdev_priv(dev); 953 struct fec_enet_priv_tx_q *txq; 954 struct fec_enet_priv_rx_q *rxq; 955 struct bufdesc *bdp; 956 unsigned int i; 957 unsigned int q; 958 959 for (q = 0; q < fep->num_rx_queues; q++) { 960 /* Initialize the receive buffer descriptors. */ 961 rxq = fep->rx_queue[q]; 962 bdp = rxq->bd.base; 963 964 for (i = 0; i < rxq->bd.ring_size; i++) { 965 966 /* Initialize the BD for every fragment in the page. */ 967 if (bdp->cbd_bufaddr) 968 bdp->cbd_sc = cpu_to_fec16(BD_ENET_RX_EMPTY); 969 else 970 bdp->cbd_sc = cpu_to_fec16(0); 971 bdp = fec_enet_get_nextdesc(bdp, &rxq->bd); 972 } 973 974 /* Set the last buffer to wrap */ 975 bdp = fec_enet_get_prevdesc(bdp, &rxq->bd); 976 bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP); 977 978 rxq->bd.cur = rxq->bd.base; 979 } 980 981 for (q = 0; q < fep->num_tx_queues; q++) { 982 /* ...and the same for transmit */ 983 txq = fep->tx_queue[q]; 984 bdp = txq->bd.base; 985 txq->bd.cur = bdp; 986 987 for (i = 0; i < txq->bd.ring_size; i++) { 988 /* Initialize the BD for every fragment in the page. */ 989 bdp->cbd_sc = cpu_to_fec16(0); 990 if (txq->tx_buf[i].type == FEC_TXBUF_T_SKB) { 991 if (bdp->cbd_bufaddr && 992 !IS_TSO_HEADER(txq, fec32_to_cpu(bdp->cbd_bufaddr))) 993 dma_unmap_single(&fep->pdev->dev, 994 fec32_to_cpu(bdp->cbd_bufaddr), 995 fec16_to_cpu(bdp->cbd_datlen), 996 DMA_TO_DEVICE); 997 if (txq->tx_buf[i].buf_p) 998 dev_kfree_skb_any(txq->tx_buf[i].buf_p); 999 } else if (txq->tx_buf[i].type == FEC_TXBUF_T_XDP_NDO) { 1000 if (bdp->cbd_bufaddr) 1001 dma_unmap_single(&fep->pdev->dev, 1002 fec32_to_cpu(bdp->cbd_bufaddr), 1003 fec16_to_cpu(bdp->cbd_datlen), 1004 DMA_TO_DEVICE); 1005 1006 if (txq->tx_buf[i].buf_p) 1007 xdp_return_frame(txq->tx_buf[i].buf_p); 1008 } else { 1009 struct page *page = txq->tx_buf[i].buf_p; 1010 1011 if (page) 1012 page_pool_put_page(page->pp, page, 0, false); 1013 } 1014 1015 txq->tx_buf[i].buf_p = NULL; 1016 /* restore default tx buffer type: FEC_TXBUF_T_SKB */ 1017 txq->tx_buf[i].type = FEC_TXBUF_T_SKB; 1018 bdp->cbd_bufaddr = cpu_to_fec32(0); 1019 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 1020 } 1021 1022 /* Set the last buffer to wrap */ 1023 bdp = fec_enet_get_prevdesc(bdp, &txq->bd); 1024 bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP); 1025 txq->dirty_tx = bdp; 1026 } 1027 } 1028 1029 static void fec_enet_active_rxring(struct net_device *ndev) 1030 { 1031 struct fec_enet_private *fep = netdev_priv(ndev); 1032 int i; 1033 1034 for (i = 0; i < fep->num_rx_queues; i++) 1035 writel(0, fep->rx_queue[i]->bd.reg_desc_active); 1036 } 1037 1038 static void fec_enet_enable_ring(struct net_device *ndev) 1039 { 1040 struct fec_enet_private *fep = netdev_priv(ndev); 1041 struct fec_enet_priv_tx_q *txq; 1042 struct fec_enet_priv_rx_q *rxq; 1043 int i; 1044 1045 for (i = 0; i < fep->num_rx_queues; i++) { 1046 rxq = fep->rx_queue[i]; 1047 writel(rxq->bd.dma, fep->hwp + FEC_R_DES_START(i)); 1048 writel(PKT_MAXBUF_SIZE, fep->hwp + FEC_R_BUFF_SIZE(i)); 1049 1050 /* enable DMA1/2 */ 1051 if (i) 1052 writel(RCMR_MATCHEN | RCMR_CMP(i), 1053 fep->hwp + FEC_RCMR(i)); 1054 } 1055 1056 for (i = 0; i < fep->num_tx_queues; i++) { 1057 txq = fep->tx_queue[i]; 1058 writel(txq->bd.dma, fep->hwp + FEC_X_DES_START(i)); 1059 1060 /* enable DMA1/2 */ 1061 if (i) 1062 writel(DMA_CLASS_EN | IDLE_SLOPE(i), 1063 fep->hwp + FEC_DMA_CFG(i)); 1064 } 1065 } 1066 1067 /* 1068 * This function is called to start or restart the FEC during a link 1069 * change, transmit timeout, or to reconfigure the FEC. The network 1070 * packet processing for this device must be stopped before this call. 1071 */ 1072 static void 1073 fec_restart(struct net_device *ndev) 1074 { 1075 struct fec_enet_private *fep = netdev_priv(ndev); 1076 u32 temp_mac[2]; 1077 u32 rcntl = OPT_FRAME_SIZE | 0x04; 1078 u32 ecntl = FEC_ECR_ETHEREN; 1079 1080 if (fep->bufdesc_ex) 1081 fec_ptp_save_state(fep); 1082 1083 /* Whack a reset. We should wait for this. 1084 * For i.MX6SX SOC, enet use AXI bus, we use disable MAC 1085 * instead of reset MAC itself. 1086 */ 1087 if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES || 1088 ((fep->quirks & FEC_QUIRK_NO_HARD_RESET) && fep->link)) { 1089 writel(0, fep->hwp + FEC_ECNTRL); 1090 } else { 1091 writel(1, fep->hwp + FEC_ECNTRL); 1092 udelay(10); 1093 } 1094 1095 /* 1096 * enet-mac reset will reset mac address registers too, 1097 * so need to reconfigure it. 1098 */ 1099 memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN); 1100 writel((__force u32)cpu_to_be32(temp_mac[0]), 1101 fep->hwp + FEC_ADDR_LOW); 1102 writel((__force u32)cpu_to_be32(temp_mac[1]), 1103 fep->hwp + FEC_ADDR_HIGH); 1104 1105 /* Clear any outstanding interrupt, except MDIO. */ 1106 writel((0xffffffff & ~FEC_ENET_MII), fep->hwp + FEC_IEVENT); 1107 1108 fec_enet_bd_init(ndev); 1109 1110 fec_enet_enable_ring(ndev); 1111 1112 /* Enable MII mode */ 1113 if (fep->full_duplex == DUPLEX_FULL) { 1114 /* FD enable */ 1115 writel(0x04, fep->hwp + FEC_X_CNTRL); 1116 } else { 1117 /* No Rcv on Xmit */ 1118 rcntl |= 0x02; 1119 writel(0x0, fep->hwp + FEC_X_CNTRL); 1120 } 1121 1122 /* Set MII speed */ 1123 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 1124 1125 #if !defined(CONFIG_M5272) 1126 if (fep->quirks & FEC_QUIRK_HAS_RACC) { 1127 u32 val = readl(fep->hwp + FEC_RACC); 1128 1129 /* align IP header */ 1130 val |= FEC_RACC_SHIFT16; 1131 if (fep->csum_flags & FLAG_RX_CSUM_ENABLED) 1132 /* set RX checksum */ 1133 val |= FEC_RACC_OPTIONS; 1134 else 1135 val &= ~FEC_RACC_OPTIONS; 1136 writel(val, fep->hwp + FEC_RACC); 1137 writel(PKT_MAXBUF_SIZE, fep->hwp + FEC_FTRL); 1138 } 1139 #endif 1140 1141 /* 1142 * The phy interface and speed need to get configured 1143 * differently on enet-mac. 1144 */ 1145 if (fep->quirks & FEC_QUIRK_ENET_MAC) { 1146 /* Enable flow control and length check */ 1147 rcntl |= 0x40000000 | 0x00000020; 1148 1149 /* RGMII, RMII or MII */ 1150 if (fep->phy_interface == PHY_INTERFACE_MODE_RGMII || 1151 fep->phy_interface == PHY_INTERFACE_MODE_RGMII_ID || 1152 fep->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID || 1153 fep->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) 1154 rcntl |= (1 << 6); 1155 else if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 1156 rcntl |= FEC_RCR_RMII; 1157 else 1158 rcntl &= ~FEC_RCR_RMII; 1159 1160 /* 1G, 100M or 10M */ 1161 if (ndev->phydev) { 1162 if (ndev->phydev->speed == SPEED_1000) 1163 ecntl |= (1 << 5); 1164 else if (ndev->phydev->speed == SPEED_100) 1165 rcntl &= ~FEC_RCR_10BASET; 1166 else 1167 rcntl |= FEC_RCR_10BASET; 1168 } 1169 } else { 1170 #ifdef FEC_MIIGSK_ENR 1171 if (fep->quirks & FEC_QUIRK_USE_GASKET) { 1172 u32 cfgr; 1173 /* disable the gasket and wait */ 1174 writel(0, fep->hwp + FEC_MIIGSK_ENR); 1175 while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) 1176 udelay(1); 1177 1178 /* 1179 * configure the gasket: 1180 * RMII, 50 MHz, no loopback, no echo 1181 * MII, 25 MHz, no loopback, no echo 1182 */ 1183 cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII) 1184 ? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII; 1185 if (ndev->phydev && ndev->phydev->speed == SPEED_10) 1186 cfgr |= BM_MIIGSK_CFGR_FRCONT_10M; 1187 writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR); 1188 1189 /* re-enable the gasket */ 1190 writel(2, fep->hwp + FEC_MIIGSK_ENR); 1191 } 1192 #endif 1193 } 1194 1195 #if !defined(CONFIG_M5272) 1196 /* enable pause frame*/ 1197 if ((fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) || 1198 ((fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) && 1199 ndev->phydev && ndev->phydev->pause)) { 1200 rcntl |= FEC_RCR_FLOWCTL; 1201 1202 /* set FIFO threshold parameter to reduce overrun */ 1203 writel(FEC_ENET_RSEM_V, fep->hwp + FEC_R_FIFO_RSEM); 1204 writel(FEC_ENET_RSFL_V, fep->hwp + FEC_R_FIFO_RSFL); 1205 writel(FEC_ENET_RAEM_V, fep->hwp + FEC_R_FIFO_RAEM); 1206 writel(FEC_ENET_RAFL_V, fep->hwp + FEC_R_FIFO_RAFL); 1207 1208 /* OPD */ 1209 writel(FEC_ENET_OPD_V, fep->hwp + FEC_OPD); 1210 } else { 1211 rcntl &= ~FEC_RCR_FLOWCTL; 1212 } 1213 #endif /* !defined(CONFIG_M5272) */ 1214 1215 writel(rcntl, fep->hwp + FEC_R_CNTRL); 1216 1217 /* Setup multicast filter. */ 1218 set_multicast_list(ndev); 1219 #ifndef CONFIG_M5272 1220 writel(0, fep->hwp + FEC_HASH_TABLE_HIGH); 1221 writel(0, fep->hwp + FEC_HASH_TABLE_LOW); 1222 #endif 1223 1224 if (fep->quirks & FEC_QUIRK_ENET_MAC) { 1225 /* enable ENET endian swap */ 1226 ecntl |= FEC_ECR_BYTESWP; 1227 /* enable ENET store and forward mode */ 1228 writel(FEC_TXWMRK_STRFWD, fep->hwp + FEC_X_WMRK); 1229 } 1230 1231 if (fep->bufdesc_ex) 1232 ecntl |= FEC_ECR_EN1588; 1233 1234 if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT && 1235 fep->rgmii_txc_dly) 1236 ecntl |= FEC_ENET_TXC_DLY; 1237 if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT && 1238 fep->rgmii_rxc_dly) 1239 ecntl |= FEC_ENET_RXC_DLY; 1240 1241 #ifndef CONFIG_M5272 1242 /* Enable the MIB statistic event counters */ 1243 writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT); 1244 #endif 1245 1246 /* And last, enable the transmit and receive processing */ 1247 writel(ecntl, fep->hwp + FEC_ECNTRL); 1248 fec_enet_active_rxring(ndev); 1249 1250 if (fep->bufdesc_ex) { 1251 fec_ptp_start_cyclecounter(ndev); 1252 fec_ptp_restore_state(fep); 1253 } 1254 1255 /* Enable interrupts we wish to service */ 1256 if (fep->link) 1257 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1258 else 1259 writel(0, fep->hwp + FEC_IMASK); 1260 1261 /* Init the interrupt coalescing */ 1262 if (fep->quirks & FEC_QUIRK_HAS_COALESCE) 1263 fec_enet_itr_coal_set(ndev); 1264 } 1265 1266 static int fec_enet_ipc_handle_init(struct fec_enet_private *fep) 1267 { 1268 if (!(of_machine_is_compatible("fsl,imx8qm") || 1269 of_machine_is_compatible("fsl,imx8qxp") || 1270 of_machine_is_compatible("fsl,imx8dxl"))) 1271 return 0; 1272 1273 return imx_scu_get_handle(&fep->ipc_handle); 1274 } 1275 1276 static void fec_enet_ipg_stop_set(struct fec_enet_private *fep, bool enabled) 1277 { 1278 struct device_node *np = fep->pdev->dev.of_node; 1279 u32 rsrc_id, val; 1280 int idx; 1281 1282 if (!np || !fep->ipc_handle) 1283 return; 1284 1285 idx = of_alias_get_id(np, "ethernet"); 1286 if (idx < 0) 1287 idx = 0; 1288 rsrc_id = idx ? IMX_SC_R_ENET_1 : IMX_SC_R_ENET_0; 1289 1290 val = enabled ? 1 : 0; 1291 imx_sc_misc_set_control(fep->ipc_handle, rsrc_id, IMX_SC_C_IPG_STOP, val); 1292 } 1293 1294 static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled) 1295 { 1296 struct fec_platform_data *pdata = fep->pdev->dev.platform_data; 1297 struct fec_stop_mode_gpr *stop_gpr = &fep->stop_gpr; 1298 1299 if (stop_gpr->gpr) { 1300 if (enabled) 1301 regmap_update_bits(stop_gpr->gpr, stop_gpr->reg, 1302 BIT(stop_gpr->bit), 1303 BIT(stop_gpr->bit)); 1304 else 1305 regmap_update_bits(stop_gpr->gpr, stop_gpr->reg, 1306 BIT(stop_gpr->bit), 0); 1307 } else if (pdata && pdata->sleep_mode_enable) { 1308 pdata->sleep_mode_enable(enabled); 1309 } else { 1310 fec_enet_ipg_stop_set(fep, enabled); 1311 } 1312 } 1313 1314 static void fec_irqs_disable(struct net_device *ndev) 1315 { 1316 struct fec_enet_private *fep = netdev_priv(ndev); 1317 1318 writel(0, fep->hwp + FEC_IMASK); 1319 } 1320 1321 static void fec_irqs_disable_except_wakeup(struct net_device *ndev) 1322 { 1323 struct fec_enet_private *fep = netdev_priv(ndev); 1324 1325 writel(0, fep->hwp + FEC_IMASK); 1326 writel(FEC_ENET_WAKEUP, fep->hwp + FEC_IMASK); 1327 } 1328 1329 static void 1330 fec_stop(struct net_device *ndev) 1331 { 1332 struct fec_enet_private *fep = netdev_priv(ndev); 1333 u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & FEC_RCR_RMII; 1334 u32 val; 1335 1336 /* We cannot expect a graceful transmit stop without link !!! */ 1337 if (fep->link) { 1338 writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */ 1339 udelay(10); 1340 if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA)) 1341 netdev_err(ndev, "Graceful transmit stop did not complete!\n"); 1342 } 1343 1344 if (fep->bufdesc_ex) 1345 fec_ptp_save_state(fep); 1346 1347 /* Whack a reset. We should wait for this. 1348 * For i.MX6SX SOC, enet use AXI bus, we use disable MAC 1349 * instead of reset MAC itself. 1350 */ 1351 if (!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) { 1352 if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES) { 1353 writel(0, fep->hwp + FEC_ECNTRL); 1354 } else { 1355 writel(FEC_ECR_RESET, fep->hwp + FEC_ECNTRL); 1356 udelay(10); 1357 } 1358 } else { 1359 val = readl(fep->hwp + FEC_ECNTRL); 1360 val |= (FEC_ECR_MAGICEN | FEC_ECR_SLEEP); 1361 writel(val, fep->hwp + FEC_ECNTRL); 1362 } 1363 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 1364 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1365 1366 /* We have to keep ENET enabled to have MII interrupt stay working */ 1367 if (fep->quirks & FEC_QUIRK_ENET_MAC && 1368 !(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) { 1369 writel(FEC_ECR_ETHEREN, fep->hwp + FEC_ECNTRL); 1370 writel(rmii_mode, fep->hwp + FEC_R_CNTRL); 1371 } 1372 1373 if (fep->bufdesc_ex) { 1374 val = readl(fep->hwp + FEC_ECNTRL); 1375 val |= FEC_ECR_EN1588; 1376 writel(val, fep->hwp + FEC_ECNTRL); 1377 1378 fec_ptp_start_cyclecounter(ndev); 1379 fec_ptp_restore_state(fep); 1380 } 1381 } 1382 1383 static void 1384 fec_timeout(struct net_device *ndev, unsigned int txqueue) 1385 { 1386 struct fec_enet_private *fep = netdev_priv(ndev); 1387 1388 fec_dump(ndev); 1389 1390 ndev->stats.tx_errors++; 1391 1392 schedule_work(&fep->tx_timeout_work); 1393 } 1394 1395 static void fec_enet_timeout_work(struct work_struct *work) 1396 { 1397 struct fec_enet_private *fep = 1398 container_of(work, struct fec_enet_private, tx_timeout_work); 1399 struct net_device *ndev = fep->netdev; 1400 1401 rtnl_lock(); 1402 if (netif_device_present(ndev) || netif_running(ndev)) { 1403 napi_disable(&fep->napi); 1404 netif_tx_lock_bh(ndev); 1405 fec_restart(ndev); 1406 netif_tx_wake_all_queues(ndev); 1407 netif_tx_unlock_bh(ndev); 1408 napi_enable(&fep->napi); 1409 } 1410 rtnl_unlock(); 1411 } 1412 1413 static void 1414 fec_enet_hwtstamp(struct fec_enet_private *fep, unsigned ts, 1415 struct skb_shared_hwtstamps *hwtstamps) 1416 { 1417 unsigned long flags; 1418 u64 ns; 1419 1420 spin_lock_irqsave(&fep->tmreg_lock, flags); 1421 ns = timecounter_cyc2time(&fep->tc, ts); 1422 spin_unlock_irqrestore(&fep->tmreg_lock, flags); 1423 1424 memset(hwtstamps, 0, sizeof(*hwtstamps)); 1425 hwtstamps->hwtstamp = ns_to_ktime(ns); 1426 } 1427 1428 static void 1429 fec_enet_tx_queue(struct net_device *ndev, u16 queue_id, int budget) 1430 { 1431 struct fec_enet_private *fep; 1432 struct xdp_frame *xdpf; 1433 struct bufdesc *bdp; 1434 unsigned short status; 1435 struct sk_buff *skb; 1436 struct fec_enet_priv_tx_q *txq; 1437 struct netdev_queue *nq; 1438 int index = 0; 1439 int entries_free; 1440 struct page *page; 1441 int frame_len; 1442 1443 fep = netdev_priv(ndev); 1444 1445 txq = fep->tx_queue[queue_id]; 1446 /* get next bdp of dirty_tx */ 1447 nq = netdev_get_tx_queue(ndev, queue_id); 1448 bdp = txq->dirty_tx; 1449 1450 /* get next bdp of dirty_tx */ 1451 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 1452 1453 while (bdp != READ_ONCE(txq->bd.cur)) { 1454 /* Order the load of bd.cur and cbd_sc */ 1455 rmb(); 1456 status = fec16_to_cpu(READ_ONCE(bdp->cbd_sc)); 1457 if (status & BD_ENET_TX_READY) 1458 break; 1459 1460 index = fec_enet_get_bd_index(bdp, &txq->bd); 1461 1462 if (txq->tx_buf[index].type == FEC_TXBUF_T_SKB) { 1463 skb = txq->tx_buf[index].buf_p; 1464 if (bdp->cbd_bufaddr && 1465 !IS_TSO_HEADER(txq, fec32_to_cpu(bdp->cbd_bufaddr))) 1466 dma_unmap_single(&fep->pdev->dev, 1467 fec32_to_cpu(bdp->cbd_bufaddr), 1468 fec16_to_cpu(bdp->cbd_datlen), 1469 DMA_TO_DEVICE); 1470 bdp->cbd_bufaddr = cpu_to_fec32(0); 1471 if (!skb) 1472 goto tx_buf_done; 1473 } else { 1474 /* Tx processing cannot call any XDP (or page pool) APIs if 1475 * the "budget" is 0. Because NAPI is called with budget of 1476 * 0 (such as netpoll) indicates we may be in an IRQ context, 1477 * however, we can't use the page pool from IRQ context. 1478 */ 1479 if (unlikely(!budget)) 1480 break; 1481 1482 if (txq->tx_buf[index].type == FEC_TXBUF_T_XDP_NDO) { 1483 xdpf = txq->tx_buf[index].buf_p; 1484 if (bdp->cbd_bufaddr) 1485 dma_unmap_single(&fep->pdev->dev, 1486 fec32_to_cpu(bdp->cbd_bufaddr), 1487 fec16_to_cpu(bdp->cbd_datlen), 1488 DMA_TO_DEVICE); 1489 } else { 1490 page = txq->tx_buf[index].buf_p; 1491 } 1492 1493 bdp->cbd_bufaddr = cpu_to_fec32(0); 1494 if (unlikely(!txq->tx_buf[index].buf_p)) { 1495 txq->tx_buf[index].type = FEC_TXBUF_T_SKB; 1496 goto tx_buf_done; 1497 } 1498 1499 frame_len = fec16_to_cpu(bdp->cbd_datlen); 1500 } 1501 1502 /* Check for errors. */ 1503 if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC | 1504 BD_ENET_TX_RL | BD_ENET_TX_UN | 1505 BD_ENET_TX_CSL)) { 1506 ndev->stats.tx_errors++; 1507 if (status & BD_ENET_TX_HB) /* No heartbeat */ 1508 ndev->stats.tx_heartbeat_errors++; 1509 if (status & BD_ENET_TX_LC) /* Late collision */ 1510 ndev->stats.tx_window_errors++; 1511 if (status & BD_ENET_TX_RL) /* Retrans limit */ 1512 ndev->stats.tx_aborted_errors++; 1513 if (status & BD_ENET_TX_UN) /* Underrun */ 1514 ndev->stats.tx_fifo_errors++; 1515 if (status & BD_ENET_TX_CSL) /* Carrier lost */ 1516 ndev->stats.tx_carrier_errors++; 1517 } else { 1518 ndev->stats.tx_packets++; 1519 1520 if (txq->tx_buf[index].type == FEC_TXBUF_T_SKB) 1521 ndev->stats.tx_bytes += skb->len; 1522 else 1523 ndev->stats.tx_bytes += frame_len; 1524 } 1525 1526 /* Deferred means some collisions occurred during transmit, 1527 * but we eventually sent the packet OK. 1528 */ 1529 if (status & BD_ENET_TX_DEF) 1530 ndev->stats.collisions++; 1531 1532 if (txq->tx_buf[index].type == FEC_TXBUF_T_SKB) { 1533 /* NOTE: SKBTX_IN_PROGRESS being set does not imply it's we who 1534 * are to time stamp the packet, so we still need to check time 1535 * stamping enabled flag. 1536 */ 1537 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS && 1538 fep->hwts_tx_en) && fep->bufdesc_ex) { 1539 struct skb_shared_hwtstamps shhwtstamps; 1540 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1541 1542 fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts), &shhwtstamps); 1543 skb_tstamp_tx(skb, &shhwtstamps); 1544 } 1545 1546 /* Free the sk buffer associated with this last transmit */ 1547 napi_consume_skb(skb, budget); 1548 } else if (txq->tx_buf[index].type == FEC_TXBUF_T_XDP_NDO) { 1549 xdp_return_frame_rx_napi(xdpf); 1550 } else { /* recycle pages of XDP_TX frames */ 1551 /* The dma_sync_size = 0 as XDP_TX has already synced DMA for_device */ 1552 page_pool_put_page(page->pp, page, 0, true); 1553 } 1554 1555 txq->tx_buf[index].buf_p = NULL; 1556 /* restore default tx buffer type: FEC_TXBUF_T_SKB */ 1557 txq->tx_buf[index].type = FEC_TXBUF_T_SKB; 1558 1559 tx_buf_done: 1560 /* Make sure the update to bdp and tx_buf are performed 1561 * before dirty_tx 1562 */ 1563 wmb(); 1564 txq->dirty_tx = bdp; 1565 1566 /* Update pointer to next buffer descriptor to be transmitted */ 1567 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 1568 1569 /* Since we have freed up a buffer, the ring is no longer full 1570 */ 1571 if (netif_tx_queue_stopped(nq)) { 1572 entries_free = fec_enet_get_free_txdesc_num(txq); 1573 if (entries_free >= txq->tx_wake_threshold) 1574 netif_tx_wake_queue(nq); 1575 } 1576 } 1577 1578 /* ERR006358: Keep the transmitter going */ 1579 if (bdp != txq->bd.cur && 1580 readl(txq->bd.reg_desc_active) == 0) 1581 writel(0, txq->bd.reg_desc_active); 1582 } 1583 1584 static void fec_enet_tx(struct net_device *ndev, int budget) 1585 { 1586 struct fec_enet_private *fep = netdev_priv(ndev); 1587 int i; 1588 1589 /* Make sure that AVB queues are processed first. */ 1590 for (i = fep->num_tx_queues - 1; i >= 0; i--) 1591 fec_enet_tx_queue(ndev, i, budget); 1592 } 1593 1594 static void fec_enet_update_cbd(struct fec_enet_priv_rx_q *rxq, 1595 struct bufdesc *bdp, int index) 1596 { 1597 struct page *new_page; 1598 dma_addr_t phys_addr; 1599 1600 new_page = page_pool_dev_alloc_pages(rxq->page_pool); 1601 WARN_ON(!new_page); 1602 rxq->rx_skb_info[index].page = new_page; 1603 1604 rxq->rx_skb_info[index].offset = FEC_ENET_XDP_HEADROOM; 1605 phys_addr = page_pool_get_dma_addr(new_page) + FEC_ENET_XDP_HEADROOM; 1606 bdp->cbd_bufaddr = cpu_to_fec32(phys_addr); 1607 } 1608 1609 static u32 1610 fec_enet_run_xdp(struct fec_enet_private *fep, struct bpf_prog *prog, 1611 struct xdp_buff *xdp, struct fec_enet_priv_rx_q *rxq, int cpu) 1612 { 1613 unsigned int sync, len = xdp->data_end - xdp->data; 1614 u32 ret = FEC_ENET_XDP_PASS; 1615 struct page *page; 1616 int err; 1617 u32 act; 1618 1619 act = bpf_prog_run_xdp(prog, xdp); 1620 1621 /* Due xdp_adjust_tail and xdp_adjust_head: DMA sync for_device cover 1622 * max len CPU touch 1623 */ 1624 sync = xdp->data_end - xdp->data; 1625 sync = max(sync, len); 1626 1627 switch (act) { 1628 case XDP_PASS: 1629 rxq->stats[RX_XDP_PASS]++; 1630 ret = FEC_ENET_XDP_PASS; 1631 break; 1632 1633 case XDP_REDIRECT: 1634 rxq->stats[RX_XDP_REDIRECT]++; 1635 err = xdp_do_redirect(fep->netdev, xdp, prog); 1636 if (unlikely(err)) 1637 goto xdp_err; 1638 1639 ret = FEC_ENET_XDP_REDIR; 1640 break; 1641 1642 case XDP_TX: 1643 rxq->stats[RX_XDP_TX]++; 1644 err = fec_enet_xdp_tx_xmit(fep, cpu, xdp, sync); 1645 if (unlikely(err)) { 1646 rxq->stats[RX_XDP_TX_ERRORS]++; 1647 goto xdp_err; 1648 } 1649 1650 ret = FEC_ENET_XDP_TX; 1651 break; 1652 1653 default: 1654 bpf_warn_invalid_xdp_action(fep->netdev, prog, act); 1655 fallthrough; 1656 1657 case XDP_ABORTED: 1658 fallthrough; /* handle aborts by dropping packet */ 1659 1660 case XDP_DROP: 1661 rxq->stats[RX_XDP_DROP]++; 1662 xdp_err: 1663 ret = FEC_ENET_XDP_CONSUMED; 1664 page = virt_to_head_page(xdp->data); 1665 page_pool_put_page(rxq->page_pool, page, sync, true); 1666 if (act != XDP_DROP) 1667 trace_xdp_exception(fep->netdev, prog, act); 1668 break; 1669 } 1670 1671 return ret; 1672 } 1673 1674 /* During a receive, the bd_rx.cur points to the current incoming buffer. 1675 * When we update through the ring, if the next incoming buffer has 1676 * not been given to the system, we just set the empty indicator, 1677 * effectively tossing the packet. 1678 */ 1679 static int 1680 fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id) 1681 { 1682 struct fec_enet_private *fep = netdev_priv(ndev); 1683 struct fec_enet_priv_rx_q *rxq; 1684 struct bufdesc *bdp; 1685 unsigned short status; 1686 struct sk_buff *skb; 1687 ushort pkt_len; 1688 __u8 *data; 1689 int pkt_received = 0; 1690 struct bufdesc_ex *ebdp = NULL; 1691 bool vlan_packet_rcvd = false; 1692 u16 vlan_tag; 1693 int index = 0; 1694 bool need_swap = fep->quirks & FEC_QUIRK_SWAP_FRAME; 1695 struct bpf_prog *xdp_prog = READ_ONCE(fep->xdp_prog); 1696 u32 ret, xdp_result = FEC_ENET_XDP_PASS; 1697 u32 data_start = FEC_ENET_XDP_HEADROOM; 1698 int cpu = smp_processor_id(); 1699 struct xdp_buff xdp; 1700 struct page *page; 1701 u32 sub_len = 4; 1702 1703 #if !defined(CONFIG_M5272) 1704 /*If it has the FEC_QUIRK_HAS_RACC quirk property, the bit of 1705 * FEC_RACC_SHIFT16 is set by default in the probe function. 1706 */ 1707 if (fep->quirks & FEC_QUIRK_HAS_RACC) { 1708 data_start += 2; 1709 sub_len += 2; 1710 } 1711 #endif 1712 1713 #if defined(CONFIG_COLDFIRE) && !defined(CONFIG_COLDFIRE_COHERENT_DMA) 1714 /* 1715 * Hacky flush of all caches instead of using the DMA API for the TSO 1716 * headers. 1717 */ 1718 flush_cache_all(); 1719 #endif 1720 rxq = fep->rx_queue[queue_id]; 1721 1722 /* First, grab all of the stats for the incoming packet. 1723 * These get messed up if we get called due to a busy condition. 1724 */ 1725 bdp = rxq->bd.cur; 1726 xdp_init_buff(&xdp, PAGE_SIZE, &rxq->xdp_rxq); 1727 1728 while (!((status = fec16_to_cpu(bdp->cbd_sc)) & BD_ENET_RX_EMPTY)) { 1729 1730 if (pkt_received >= budget) 1731 break; 1732 pkt_received++; 1733 1734 writel(FEC_ENET_RXF_GET(queue_id), fep->hwp + FEC_IEVENT); 1735 1736 /* Check for errors. */ 1737 status ^= BD_ENET_RX_LAST; 1738 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | 1739 BD_ENET_RX_CR | BD_ENET_RX_OV | BD_ENET_RX_LAST | 1740 BD_ENET_RX_CL)) { 1741 ndev->stats.rx_errors++; 1742 if (status & BD_ENET_RX_OV) { 1743 /* FIFO overrun */ 1744 ndev->stats.rx_fifo_errors++; 1745 goto rx_processing_done; 1746 } 1747 if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH 1748 | BD_ENET_RX_LAST)) { 1749 /* Frame too long or too short. */ 1750 ndev->stats.rx_length_errors++; 1751 if (status & BD_ENET_RX_LAST) 1752 netdev_err(ndev, "rcv is not +last\n"); 1753 } 1754 if (status & BD_ENET_RX_CR) /* CRC Error */ 1755 ndev->stats.rx_crc_errors++; 1756 /* Report late collisions as a frame error. */ 1757 if (status & (BD_ENET_RX_NO | BD_ENET_RX_CL)) 1758 ndev->stats.rx_frame_errors++; 1759 goto rx_processing_done; 1760 } 1761 1762 /* Process the incoming frame. */ 1763 ndev->stats.rx_packets++; 1764 pkt_len = fec16_to_cpu(bdp->cbd_datlen); 1765 ndev->stats.rx_bytes += pkt_len; 1766 1767 index = fec_enet_get_bd_index(bdp, &rxq->bd); 1768 page = rxq->rx_skb_info[index].page; 1769 dma_sync_single_for_cpu(&fep->pdev->dev, 1770 fec32_to_cpu(bdp->cbd_bufaddr), 1771 pkt_len, 1772 DMA_FROM_DEVICE); 1773 prefetch(page_address(page)); 1774 fec_enet_update_cbd(rxq, bdp, index); 1775 1776 if (xdp_prog) { 1777 xdp_buff_clear_frags_flag(&xdp); 1778 /* subtract 16bit shift and FCS */ 1779 xdp_prepare_buff(&xdp, page_address(page), 1780 data_start, pkt_len - sub_len, false); 1781 ret = fec_enet_run_xdp(fep, xdp_prog, &xdp, rxq, cpu); 1782 xdp_result |= ret; 1783 if (ret != FEC_ENET_XDP_PASS) 1784 goto rx_processing_done; 1785 } 1786 1787 /* The packet length includes FCS, but we don't want to 1788 * include that when passing upstream as it messes up 1789 * bridging applications. 1790 */ 1791 skb = build_skb(page_address(page), PAGE_SIZE); 1792 if (unlikely(!skb)) { 1793 page_pool_recycle_direct(rxq->page_pool, page); 1794 ndev->stats.rx_dropped++; 1795 1796 netdev_err_once(ndev, "build_skb failed!\n"); 1797 goto rx_processing_done; 1798 } 1799 1800 skb_reserve(skb, data_start); 1801 skb_put(skb, pkt_len - sub_len); 1802 skb_mark_for_recycle(skb); 1803 1804 if (unlikely(need_swap)) { 1805 data = page_address(page) + FEC_ENET_XDP_HEADROOM; 1806 swap_buffer(data, pkt_len); 1807 } 1808 data = skb->data; 1809 1810 /* Extract the enhanced buffer descriptor */ 1811 ebdp = NULL; 1812 if (fep->bufdesc_ex) 1813 ebdp = (struct bufdesc_ex *)bdp; 1814 1815 /* If this is a VLAN packet remove the VLAN Tag */ 1816 vlan_packet_rcvd = false; 1817 if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) && 1818 fep->bufdesc_ex && 1819 (ebdp->cbd_esc & cpu_to_fec32(BD_ENET_RX_VLAN))) { 1820 /* Push and remove the vlan tag */ 1821 struct vlan_hdr *vlan_header = 1822 (struct vlan_hdr *) (data + ETH_HLEN); 1823 vlan_tag = ntohs(vlan_header->h_vlan_TCI); 1824 1825 vlan_packet_rcvd = true; 1826 1827 memmove(skb->data + VLAN_HLEN, data, ETH_ALEN * 2); 1828 skb_pull(skb, VLAN_HLEN); 1829 } 1830 1831 skb->protocol = eth_type_trans(skb, ndev); 1832 1833 /* Get receive timestamp from the skb */ 1834 if (fep->hwts_rx_en && fep->bufdesc_ex) 1835 fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts), 1836 skb_hwtstamps(skb)); 1837 1838 if (fep->bufdesc_ex && 1839 (fep->csum_flags & FLAG_RX_CSUM_ENABLED)) { 1840 if (!(ebdp->cbd_esc & cpu_to_fec32(FLAG_RX_CSUM_ERROR))) { 1841 /* don't check it */ 1842 skb->ip_summed = CHECKSUM_UNNECESSARY; 1843 } else { 1844 skb_checksum_none_assert(skb); 1845 } 1846 } 1847 1848 /* Handle received VLAN packets */ 1849 if (vlan_packet_rcvd) 1850 __vlan_hwaccel_put_tag(skb, 1851 htons(ETH_P_8021Q), 1852 vlan_tag); 1853 1854 skb_record_rx_queue(skb, queue_id); 1855 napi_gro_receive(&fep->napi, skb); 1856 1857 rx_processing_done: 1858 /* Clear the status flags for this buffer */ 1859 status &= ~BD_ENET_RX_STATS; 1860 1861 /* Mark the buffer empty */ 1862 status |= BD_ENET_RX_EMPTY; 1863 1864 if (fep->bufdesc_ex) { 1865 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 1866 1867 ebdp->cbd_esc = cpu_to_fec32(BD_ENET_RX_INT); 1868 ebdp->cbd_prot = 0; 1869 ebdp->cbd_bdu = 0; 1870 } 1871 /* Make sure the updates to rest of the descriptor are 1872 * performed before transferring ownership. 1873 */ 1874 wmb(); 1875 bdp->cbd_sc = cpu_to_fec16(status); 1876 1877 /* Update BD pointer to next entry */ 1878 bdp = fec_enet_get_nextdesc(bdp, &rxq->bd); 1879 1880 /* Doing this here will keep the FEC running while we process 1881 * incoming frames. On a heavily loaded network, we should be 1882 * able to keep up at the expense of system resources. 1883 */ 1884 writel(0, rxq->bd.reg_desc_active); 1885 } 1886 rxq->bd.cur = bdp; 1887 1888 if (xdp_result & FEC_ENET_XDP_REDIR) 1889 xdp_do_flush(); 1890 1891 return pkt_received; 1892 } 1893 1894 static int fec_enet_rx(struct net_device *ndev, int budget) 1895 { 1896 struct fec_enet_private *fep = netdev_priv(ndev); 1897 int i, done = 0; 1898 1899 /* Make sure that AVB queues are processed first. */ 1900 for (i = fep->num_rx_queues - 1; i >= 0; i--) 1901 done += fec_enet_rx_queue(ndev, budget - done, i); 1902 1903 return done; 1904 } 1905 1906 static bool fec_enet_collect_events(struct fec_enet_private *fep) 1907 { 1908 uint int_events; 1909 1910 int_events = readl(fep->hwp + FEC_IEVENT); 1911 1912 /* Don't clear MDIO events, we poll for those */ 1913 int_events &= ~FEC_ENET_MII; 1914 1915 writel(int_events, fep->hwp + FEC_IEVENT); 1916 1917 return int_events != 0; 1918 } 1919 1920 static irqreturn_t 1921 fec_enet_interrupt(int irq, void *dev_id) 1922 { 1923 struct net_device *ndev = dev_id; 1924 struct fec_enet_private *fep = netdev_priv(ndev); 1925 irqreturn_t ret = IRQ_NONE; 1926 1927 if (fec_enet_collect_events(fep) && fep->link) { 1928 ret = IRQ_HANDLED; 1929 1930 if (napi_schedule_prep(&fep->napi)) { 1931 /* Disable interrupts */ 1932 writel(0, fep->hwp + FEC_IMASK); 1933 __napi_schedule(&fep->napi); 1934 } 1935 } 1936 1937 return ret; 1938 } 1939 1940 static int fec_enet_rx_napi(struct napi_struct *napi, int budget) 1941 { 1942 struct net_device *ndev = napi->dev; 1943 struct fec_enet_private *fep = netdev_priv(ndev); 1944 int done = 0; 1945 1946 do { 1947 done += fec_enet_rx(ndev, budget - done); 1948 fec_enet_tx(ndev, budget); 1949 } while ((done < budget) && fec_enet_collect_events(fep)); 1950 1951 if (done < budget) { 1952 napi_complete_done(napi, done); 1953 writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); 1954 } 1955 1956 return done; 1957 } 1958 1959 /* ------------------------------------------------------------------------- */ 1960 static int fec_get_mac(struct net_device *ndev) 1961 { 1962 struct fec_enet_private *fep = netdev_priv(ndev); 1963 unsigned char *iap, tmpaddr[ETH_ALEN]; 1964 int ret; 1965 1966 /* 1967 * try to get mac address in following order: 1968 * 1969 * 1) module parameter via kernel command line in form 1970 * fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0 1971 */ 1972 iap = macaddr; 1973 1974 /* 1975 * 2) from device tree data 1976 */ 1977 if (!is_valid_ether_addr(iap)) { 1978 struct device_node *np = fep->pdev->dev.of_node; 1979 if (np) { 1980 ret = of_get_mac_address(np, tmpaddr); 1981 if (!ret) 1982 iap = tmpaddr; 1983 else if (ret == -EPROBE_DEFER) 1984 return ret; 1985 } 1986 } 1987 1988 /* 1989 * 3) from flash or fuse (via platform data) 1990 */ 1991 if (!is_valid_ether_addr(iap)) { 1992 #ifdef CONFIG_M5272 1993 if (FEC_FLASHMAC) 1994 iap = (unsigned char *)FEC_FLASHMAC; 1995 #else 1996 struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev); 1997 1998 if (pdata) 1999 iap = (unsigned char *)&pdata->mac; 2000 #endif 2001 } 2002 2003 /* 2004 * 4) FEC mac registers set by bootloader 2005 */ 2006 if (!is_valid_ether_addr(iap)) { 2007 *((__be32 *) &tmpaddr[0]) = 2008 cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW)); 2009 *((__be16 *) &tmpaddr[4]) = 2010 cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); 2011 iap = &tmpaddr[0]; 2012 } 2013 2014 /* 2015 * 5) random mac address 2016 */ 2017 if (!is_valid_ether_addr(iap)) { 2018 /* Report it and use a random ethernet address instead */ 2019 dev_err(&fep->pdev->dev, "Invalid MAC address: %pM\n", iap); 2020 eth_hw_addr_random(ndev); 2021 dev_info(&fep->pdev->dev, "Using random MAC address: %pM\n", 2022 ndev->dev_addr); 2023 return 0; 2024 } 2025 2026 /* Adjust MAC if using macaddr */ 2027 eth_hw_addr_gen(ndev, iap, iap == macaddr ? fep->dev_id : 0); 2028 2029 return 0; 2030 } 2031 2032 /* ------------------------------------------------------------------------- */ 2033 2034 /* 2035 * Phy section 2036 */ 2037 2038 /* LPI Sleep Ts count base on tx clk (clk_ref). 2039 * The lpi sleep cnt value = X us / (cycle_ns). 2040 */ 2041 static int fec_enet_us_to_tx_cycle(struct net_device *ndev, int us) 2042 { 2043 struct fec_enet_private *fep = netdev_priv(ndev); 2044 2045 return us * (fep->clk_ref_rate / 1000) / 1000; 2046 } 2047 2048 static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable) 2049 { 2050 struct fec_enet_private *fep = netdev_priv(ndev); 2051 struct ethtool_keee *p = &fep->eee; 2052 unsigned int sleep_cycle, wake_cycle; 2053 2054 if (enable) { 2055 sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer); 2056 wake_cycle = sleep_cycle; 2057 } else { 2058 sleep_cycle = 0; 2059 wake_cycle = 0; 2060 } 2061 2062 writel(sleep_cycle, fep->hwp + FEC_LPI_SLEEP); 2063 writel(wake_cycle, fep->hwp + FEC_LPI_WAKE); 2064 2065 return 0; 2066 } 2067 2068 static void fec_enet_adjust_link(struct net_device *ndev) 2069 { 2070 struct fec_enet_private *fep = netdev_priv(ndev); 2071 struct phy_device *phy_dev = ndev->phydev; 2072 int status_change = 0; 2073 2074 /* 2075 * If the netdev is down, or is going down, we're not interested 2076 * in link state events, so just mark our idea of the link as down 2077 * and ignore the event. 2078 */ 2079 if (!netif_running(ndev) || !netif_device_present(ndev)) { 2080 fep->link = 0; 2081 } else if (phy_dev->link) { 2082 if (!fep->link) { 2083 fep->link = phy_dev->link; 2084 status_change = 1; 2085 } 2086 2087 if (fep->full_duplex != phy_dev->duplex) { 2088 fep->full_duplex = phy_dev->duplex; 2089 status_change = 1; 2090 } 2091 2092 if (phy_dev->speed != fep->speed) { 2093 fep->speed = phy_dev->speed; 2094 status_change = 1; 2095 } 2096 2097 /* if any of the above changed restart the FEC */ 2098 if (status_change) { 2099 netif_stop_queue(ndev); 2100 napi_disable(&fep->napi); 2101 netif_tx_lock_bh(ndev); 2102 fec_restart(ndev); 2103 netif_tx_wake_all_queues(ndev); 2104 netif_tx_unlock_bh(ndev); 2105 napi_enable(&fep->napi); 2106 } 2107 if (fep->quirks & FEC_QUIRK_HAS_EEE) 2108 fec_enet_eee_mode_set(ndev, phy_dev->enable_tx_lpi); 2109 } else { 2110 if (fep->link) { 2111 netif_stop_queue(ndev); 2112 napi_disable(&fep->napi); 2113 netif_tx_lock_bh(ndev); 2114 fec_stop(ndev); 2115 netif_tx_unlock_bh(ndev); 2116 napi_enable(&fep->napi); 2117 fep->link = phy_dev->link; 2118 status_change = 1; 2119 } 2120 } 2121 2122 if (status_change) 2123 phy_print_status(phy_dev); 2124 } 2125 2126 static int fec_enet_mdio_wait(struct fec_enet_private *fep) 2127 { 2128 uint ievent; 2129 int ret; 2130 2131 ret = readl_poll_timeout_atomic(fep->hwp + FEC_IEVENT, ievent, 2132 ievent & FEC_ENET_MII, 2, 30000); 2133 2134 if (!ret) 2135 writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT); 2136 2137 return ret; 2138 } 2139 2140 static int fec_enet_mdio_read_c22(struct mii_bus *bus, int mii_id, int regnum) 2141 { 2142 struct fec_enet_private *fep = bus->priv; 2143 struct device *dev = &fep->pdev->dev; 2144 int ret = 0, frame_start, frame_addr, frame_op; 2145 2146 ret = pm_runtime_resume_and_get(dev); 2147 if (ret < 0) 2148 return ret; 2149 2150 /* C22 read */ 2151 frame_op = FEC_MMFR_OP_READ; 2152 frame_start = FEC_MMFR_ST; 2153 frame_addr = regnum; 2154 2155 /* start a read op */ 2156 writel(frame_start | frame_op | 2157 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) | 2158 FEC_MMFR_TA, fep->hwp + FEC_MII_DATA); 2159 2160 /* wait for end of transfer */ 2161 ret = fec_enet_mdio_wait(fep); 2162 if (ret) { 2163 netdev_err(fep->netdev, "MDIO read timeout\n"); 2164 goto out; 2165 } 2166 2167 ret = FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA)); 2168 2169 out: 2170 pm_runtime_mark_last_busy(dev); 2171 pm_runtime_put_autosuspend(dev); 2172 2173 return ret; 2174 } 2175 2176 static int fec_enet_mdio_read_c45(struct mii_bus *bus, int mii_id, 2177 int devad, int regnum) 2178 { 2179 struct fec_enet_private *fep = bus->priv; 2180 struct device *dev = &fep->pdev->dev; 2181 int ret = 0, frame_start, frame_op; 2182 2183 ret = pm_runtime_resume_and_get(dev); 2184 if (ret < 0) 2185 return ret; 2186 2187 frame_start = FEC_MMFR_ST_C45; 2188 2189 /* write address */ 2190 writel(frame_start | FEC_MMFR_OP_ADDR_WRITE | 2191 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) | 2192 FEC_MMFR_TA | (regnum & 0xFFFF), 2193 fep->hwp + FEC_MII_DATA); 2194 2195 /* wait for end of transfer */ 2196 ret = fec_enet_mdio_wait(fep); 2197 if (ret) { 2198 netdev_err(fep->netdev, "MDIO address write timeout\n"); 2199 goto out; 2200 } 2201 2202 frame_op = FEC_MMFR_OP_READ_C45; 2203 2204 /* start a read op */ 2205 writel(frame_start | frame_op | 2206 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) | 2207 FEC_MMFR_TA, fep->hwp + FEC_MII_DATA); 2208 2209 /* wait for end of transfer */ 2210 ret = fec_enet_mdio_wait(fep); 2211 if (ret) { 2212 netdev_err(fep->netdev, "MDIO read timeout\n"); 2213 goto out; 2214 } 2215 2216 ret = FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA)); 2217 2218 out: 2219 pm_runtime_mark_last_busy(dev); 2220 pm_runtime_put_autosuspend(dev); 2221 2222 return ret; 2223 } 2224 2225 static int fec_enet_mdio_write_c22(struct mii_bus *bus, int mii_id, int regnum, 2226 u16 value) 2227 { 2228 struct fec_enet_private *fep = bus->priv; 2229 struct device *dev = &fep->pdev->dev; 2230 int ret, frame_start, frame_addr; 2231 2232 ret = pm_runtime_resume_and_get(dev); 2233 if (ret < 0) 2234 return ret; 2235 2236 /* C22 write */ 2237 frame_start = FEC_MMFR_ST; 2238 frame_addr = regnum; 2239 2240 /* start a write op */ 2241 writel(frame_start | FEC_MMFR_OP_WRITE | 2242 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) | 2243 FEC_MMFR_TA | FEC_MMFR_DATA(value), 2244 fep->hwp + FEC_MII_DATA); 2245 2246 /* wait for end of transfer */ 2247 ret = fec_enet_mdio_wait(fep); 2248 if (ret) 2249 netdev_err(fep->netdev, "MDIO write timeout\n"); 2250 2251 pm_runtime_mark_last_busy(dev); 2252 pm_runtime_put_autosuspend(dev); 2253 2254 return ret; 2255 } 2256 2257 static int fec_enet_mdio_write_c45(struct mii_bus *bus, int mii_id, 2258 int devad, int regnum, u16 value) 2259 { 2260 struct fec_enet_private *fep = bus->priv; 2261 struct device *dev = &fep->pdev->dev; 2262 int ret, frame_start; 2263 2264 ret = pm_runtime_resume_and_get(dev); 2265 if (ret < 0) 2266 return ret; 2267 2268 frame_start = FEC_MMFR_ST_C45; 2269 2270 /* write address */ 2271 writel(frame_start | FEC_MMFR_OP_ADDR_WRITE | 2272 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) | 2273 FEC_MMFR_TA | (regnum & 0xFFFF), 2274 fep->hwp + FEC_MII_DATA); 2275 2276 /* wait for end of transfer */ 2277 ret = fec_enet_mdio_wait(fep); 2278 if (ret) { 2279 netdev_err(fep->netdev, "MDIO address write timeout\n"); 2280 goto out; 2281 } 2282 2283 /* start a write op */ 2284 writel(frame_start | FEC_MMFR_OP_WRITE | 2285 FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) | 2286 FEC_MMFR_TA | FEC_MMFR_DATA(value), 2287 fep->hwp + FEC_MII_DATA); 2288 2289 /* wait for end of transfer */ 2290 ret = fec_enet_mdio_wait(fep); 2291 if (ret) 2292 netdev_err(fep->netdev, "MDIO write timeout\n"); 2293 2294 out: 2295 pm_runtime_mark_last_busy(dev); 2296 pm_runtime_put_autosuspend(dev); 2297 2298 return ret; 2299 } 2300 2301 static void fec_enet_phy_reset_after_clk_enable(struct net_device *ndev) 2302 { 2303 struct fec_enet_private *fep = netdev_priv(ndev); 2304 struct phy_device *phy_dev = ndev->phydev; 2305 2306 if (phy_dev) { 2307 phy_reset_after_clk_enable(phy_dev); 2308 } else if (fep->phy_node) { 2309 /* 2310 * If the PHY still is not bound to the MAC, but there is 2311 * OF PHY node and a matching PHY device instance already, 2312 * use the OF PHY node to obtain the PHY device instance, 2313 * and then use that PHY device instance when triggering 2314 * the PHY reset. 2315 */ 2316 phy_dev = of_phy_find_device(fep->phy_node); 2317 phy_reset_after_clk_enable(phy_dev); 2318 put_device(&phy_dev->mdio.dev); 2319 } 2320 } 2321 2322 static int fec_enet_clk_enable(struct net_device *ndev, bool enable) 2323 { 2324 struct fec_enet_private *fep = netdev_priv(ndev); 2325 int ret; 2326 2327 if (enable) { 2328 ret = clk_prepare_enable(fep->clk_enet_out); 2329 if (ret) 2330 return ret; 2331 2332 if (fep->clk_ptp) { 2333 mutex_lock(&fep->ptp_clk_mutex); 2334 ret = clk_prepare_enable(fep->clk_ptp); 2335 if (ret) { 2336 mutex_unlock(&fep->ptp_clk_mutex); 2337 goto failed_clk_ptp; 2338 } else { 2339 fep->ptp_clk_on = true; 2340 } 2341 mutex_unlock(&fep->ptp_clk_mutex); 2342 } 2343 2344 ret = clk_prepare_enable(fep->clk_ref); 2345 if (ret) 2346 goto failed_clk_ref; 2347 2348 ret = clk_prepare_enable(fep->clk_2x_txclk); 2349 if (ret) 2350 goto failed_clk_2x_txclk; 2351 2352 fec_enet_phy_reset_after_clk_enable(ndev); 2353 } else { 2354 clk_disable_unprepare(fep->clk_enet_out); 2355 if (fep->clk_ptp) { 2356 mutex_lock(&fep->ptp_clk_mutex); 2357 clk_disable_unprepare(fep->clk_ptp); 2358 fep->ptp_clk_on = false; 2359 mutex_unlock(&fep->ptp_clk_mutex); 2360 } 2361 clk_disable_unprepare(fep->clk_ref); 2362 clk_disable_unprepare(fep->clk_2x_txclk); 2363 } 2364 2365 return 0; 2366 2367 failed_clk_2x_txclk: 2368 if (fep->clk_ref) 2369 clk_disable_unprepare(fep->clk_ref); 2370 failed_clk_ref: 2371 if (fep->clk_ptp) { 2372 mutex_lock(&fep->ptp_clk_mutex); 2373 clk_disable_unprepare(fep->clk_ptp); 2374 fep->ptp_clk_on = false; 2375 mutex_unlock(&fep->ptp_clk_mutex); 2376 } 2377 failed_clk_ptp: 2378 clk_disable_unprepare(fep->clk_enet_out); 2379 2380 return ret; 2381 } 2382 2383 static int fec_enet_parse_rgmii_delay(struct fec_enet_private *fep, 2384 struct device_node *np) 2385 { 2386 u32 rgmii_tx_delay, rgmii_rx_delay; 2387 2388 /* For rgmii tx internal delay, valid values are 0ps and 2000ps */ 2389 if (!of_property_read_u32(np, "tx-internal-delay-ps", &rgmii_tx_delay)) { 2390 if (rgmii_tx_delay != 0 && rgmii_tx_delay != 2000) { 2391 dev_err(&fep->pdev->dev, "The only allowed RGMII TX delay values are: 0ps, 2000ps"); 2392 return -EINVAL; 2393 } else if (rgmii_tx_delay == 2000) { 2394 fep->rgmii_txc_dly = true; 2395 } 2396 } 2397 2398 /* For rgmii rx internal delay, valid values are 0ps and 2000ps */ 2399 if (!of_property_read_u32(np, "rx-internal-delay-ps", &rgmii_rx_delay)) { 2400 if (rgmii_rx_delay != 0 && rgmii_rx_delay != 2000) { 2401 dev_err(&fep->pdev->dev, "The only allowed RGMII RX delay values are: 0ps, 2000ps"); 2402 return -EINVAL; 2403 } else if (rgmii_rx_delay == 2000) { 2404 fep->rgmii_rxc_dly = true; 2405 } 2406 } 2407 2408 return 0; 2409 } 2410 2411 static int fec_enet_mii_probe(struct net_device *ndev) 2412 { 2413 struct fec_enet_private *fep = netdev_priv(ndev); 2414 struct phy_device *phy_dev = NULL; 2415 char mdio_bus_id[MII_BUS_ID_SIZE]; 2416 char phy_name[MII_BUS_ID_SIZE + 3]; 2417 int phy_id; 2418 int dev_id = fep->dev_id; 2419 2420 if (fep->phy_node) { 2421 phy_dev = of_phy_connect(ndev, fep->phy_node, 2422 &fec_enet_adjust_link, 0, 2423 fep->phy_interface); 2424 if (!phy_dev) { 2425 netdev_err(ndev, "Unable to connect to phy\n"); 2426 return -ENODEV; 2427 } 2428 } else { 2429 /* check for attached phy */ 2430 for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) { 2431 if (!mdiobus_is_registered_device(fep->mii_bus, phy_id)) 2432 continue; 2433 if (dev_id--) 2434 continue; 2435 strscpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE); 2436 break; 2437 } 2438 2439 if (phy_id >= PHY_MAX_ADDR) { 2440 netdev_info(ndev, "no PHY, assuming direct connection to switch\n"); 2441 strscpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); 2442 phy_id = 0; 2443 } 2444 2445 snprintf(phy_name, sizeof(phy_name), 2446 PHY_ID_FMT, mdio_bus_id, phy_id); 2447 phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 2448 fep->phy_interface); 2449 } 2450 2451 if (IS_ERR(phy_dev)) { 2452 netdev_err(ndev, "could not attach to PHY\n"); 2453 return PTR_ERR(phy_dev); 2454 } 2455 2456 /* mask with MAC supported features */ 2457 if (fep->quirks & FEC_QUIRK_HAS_GBIT) { 2458 phy_set_max_speed(phy_dev, 1000); 2459 phy_remove_link_mode(phy_dev, 2460 ETHTOOL_LINK_MODE_1000baseT_Half_BIT); 2461 #if !defined(CONFIG_M5272) 2462 phy_support_sym_pause(phy_dev); 2463 #endif 2464 } 2465 else 2466 phy_set_max_speed(phy_dev, 100); 2467 2468 if (fep->quirks & FEC_QUIRK_HAS_EEE) 2469 phy_support_eee(phy_dev); 2470 2471 fep->link = 0; 2472 fep->full_duplex = 0; 2473 2474 phy_attached_info(phy_dev); 2475 2476 return 0; 2477 } 2478 2479 static int fec_enet_mii_init(struct platform_device *pdev) 2480 { 2481 static struct mii_bus *fec0_mii_bus; 2482 struct net_device *ndev = platform_get_drvdata(pdev); 2483 struct fec_enet_private *fep = netdev_priv(ndev); 2484 bool suppress_preamble = false; 2485 struct phy_device *phydev; 2486 struct device_node *node; 2487 int err = -ENXIO; 2488 u32 mii_speed, holdtime; 2489 u32 bus_freq; 2490 int addr; 2491 2492 /* 2493 * The i.MX28 dual fec interfaces are not equal. 2494 * Here are the differences: 2495 * 2496 * - fec0 supports MII & RMII modes while fec1 only supports RMII 2497 * - fec0 acts as the 1588 time master while fec1 is slave 2498 * - external phys can only be configured by fec0 2499 * 2500 * That is to say fec1 can not work independently. It only works 2501 * when fec0 is working. The reason behind this design is that the 2502 * second interface is added primarily for Switch mode. 2503 * 2504 * Because of the last point above, both phys are attached on fec0 2505 * mdio interface in board design, and need to be configured by 2506 * fec0 mii_bus. 2507 */ 2508 if ((fep->quirks & FEC_QUIRK_SINGLE_MDIO) && fep->dev_id > 0) { 2509 /* fec1 uses fec0 mii_bus */ 2510 if (mii_cnt && fec0_mii_bus) { 2511 fep->mii_bus = fec0_mii_bus; 2512 mii_cnt++; 2513 return 0; 2514 } 2515 return -ENOENT; 2516 } 2517 2518 bus_freq = 2500000; /* 2.5MHz by default */ 2519 node = of_get_child_by_name(pdev->dev.of_node, "mdio"); 2520 if (node) { 2521 of_property_read_u32(node, "clock-frequency", &bus_freq); 2522 suppress_preamble = of_property_read_bool(node, 2523 "suppress-preamble"); 2524 } 2525 2526 /* 2527 * Set MII speed (= clk_get_rate() / 2 * phy_speed) 2528 * 2529 * The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while 2530 * for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'. The i.MX28 2531 * Reference Manual has an error on this, and gets fixed on i.MX6Q 2532 * document. 2533 */ 2534 mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), bus_freq * 2); 2535 if (fep->quirks & FEC_QUIRK_ENET_MAC) 2536 mii_speed--; 2537 if (mii_speed > 63) { 2538 dev_err(&pdev->dev, 2539 "fec clock (%lu) too fast to get right mii speed\n", 2540 clk_get_rate(fep->clk_ipg)); 2541 err = -EINVAL; 2542 goto err_out; 2543 } 2544 2545 /* 2546 * The i.MX28 and i.MX6 types have another filed in the MSCR (aka 2547 * MII_SPEED) register that defines the MDIO output hold time. Earlier 2548 * versions are RAZ there, so just ignore the difference and write the 2549 * register always. 2550 * The minimal hold time according to IEE802.3 (clause 22) is 10 ns. 2551 * HOLDTIME + 1 is the number of clk cycles the fec is holding the 2552 * output. 2553 * The HOLDTIME bitfield takes values between 0 and 7 (inclusive). 2554 * Given that ceil(clkrate / 5000000) <= 64, the calculation for 2555 * holdtime cannot result in a value greater than 3. 2556 */ 2557 holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1; 2558 2559 fep->phy_speed = mii_speed << 1 | holdtime << 8; 2560 2561 if (suppress_preamble) 2562 fep->phy_speed |= BIT(7); 2563 2564 if (fep->quirks & FEC_QUIRK_CLEAR_SETUP_MII) { 2565 /* Clear MMFR to avoid to generate MII event by writing MSCR. 2566 * MII event generation condition: 2567 * - writing MSCR: 2568 * - mmfr[31:0]_not_zero & mscr[7:0]_is_zero & 2569 * mscr_reg_data_in[7:0] != 0 2570 * - writing MMFR: 2571 * - mscr[7:0]_not_zero 2572 */ 2573 writel(0, fep->hwp + FEC_MII_DATA); 2574 } 2575 2576 writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); 2577 2578 /* Clear any pending transaction complete indication */ 2579 writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT); 2580 2581 fep->mii_bus = mdiobus_alloc(); 2582 if (fep->mii_bus == NULL) { 2583 err = -ENOMEM; 2584 goto err_out; 2585 } 2586 2587 fep->mii_bus->name = "fec_enet_mii_bus"; 2588 fep->mii_bus->read = fec_enet_mdio_read_c22; 2589 fep->mii_bus->write = fec_enet_mdio_write_c22; 2590 if (fep->quirks & FEC_QUIRK_HAS_MDIO_C45) { 2591 fep->mii_bus->read_c45 = fec_enet_mdio_read_c45; 2592 fep->mii_bus->write_c45 = fec_enet_mdio_write_c45; 2593 } 2594 snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", 2595 pdev->name, fep->dev_id + 1); 2596 fep->mii_bus->priv = fep; 2597 fep->mii_bus->parent = &pdev->dev; 2598 2599 err = of_mdiobus_register(fep->mii_bus, node); 2600 if (err) 2601 goto err_out_free_mdiobus; 2602 of_node_put(node); 2603 2604 /* find all the PHY devices on the bus and set mac_managed_pm to true */ 2605 for (addr = 0; addr < PHY_MAX_ADDR; addr++) { 2606 phydev = mdiobus_get_phy(fep->mii_bus, addr); 2607 if (phydev) 2608 phydev->mac_managed_pm = true; 2609 } 2610 2611 mii_cnt++; 2612 2613 /* save fec0 mii_bus */ 2614 if (fep->quirks & FEC_QUIRK_SINGLE_MDIO) 2615 fec0_mii_bus = fep->mii_bus; 2616 2617 return 0; 2618 2619 err_out_free_mdiobus: 2620 mdiobus_free(fep->mii_bus); 2621 err_out: 2622 of_node_put(node); 2623 return err; 2624 } 2625 2626 static void fec_enet_mii_remove(struct fec_enet_private *fep) 2627 { 2628 if (--mii_cnt == 0) { 2629 mdiobus_unregister(fep->mii_bus); 2630 mdiobus_free(fep->mii_bus); 2631 } 2632 } 2633 2634 static void fec_enet_get_drvinfo(struct net_device *ndev, 2635 struct ethtool_drvinfo *info) 2636 { 2637 struct fec_enet_private *fep = netdev_priv(ndev); 2638 2639 strscpy(info->driver, fep->pdev->dev.driver->name, 2640 sizeof(info->driver)); 2641 strscpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info)); 2642 } 2643 2644 static int fec_enet_get_regs_len(struct net_device *ndev) 2645 { 2646 struct fec_enet_private *fep = netdev_priv(ndev); 2647 struct resource *r; 2648 int s = 0; 2649 2650 r = platform_get_resource(fep->pdev, IORESOURCE_MEM, 0); 2651 if (r) 2652 s = resource_size(r); 2653 2654 return s; 2655 } 2656 2657 /* List of registers that can be safety be read to dump them with ethtool */ 2658 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ 2659 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \ 2660 defined(CONFIG_ARM64) || defined(CONFIG_COMPILE_TEST) 2661 static __u32 fec_enet_register_version = 2; 2662 static u32 fec_enet_register_offset[] = { 2663 FEC_IEVENT, FEC_IMASK, FEC_R_DES_ACTIVE_0, FEC_X_DES_ACTIVE_0, 2664 FEC_ECNTRL, FEC_MII_DATA, FEC_MII_SPEED, FEC_MIB_CTRLSTAT, FEC_R_CNTRL, 2665 FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH, FEC_OPD, FEC_TXIC0, FEC_TXIC1, 2666 FEC_TXIC2, FEC_RXIC0, FEC_RXIC1, FEC_RXIC2, FEC_HASH_TABLE_HIGH, 2667 FEC_HASH_TABLE_LOW, FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW, 2668 FEC_X_WMRK, FEC_R_BOUND, FEC_R_FSTART, FEC_R_DES_START_1, 2669 FEC_X_DES_START_1, FEC_R_BUFF_SIZE_1, FEC_R_DES_START_2, 2670 FEC_X_DES_START_2, FEC_R_BUFF_SIZE_2, FEC_R_DES_START_0, 2671 FEC_X_DES_START_0, FEC_R_BUFF_SIZE_0, FEC_R_FIFO_RSFL, FEC_R_FIFO_RSEM, 2672 FEC_R_FIFO_RAEM, FEC_R_FIFO_RAFL, FEC_RACC, FEC_RCMR_1, FEC_RCMR_2, 2673 FEC_DMA_CFG_1, FEC_DMA_CFG_2, FEC_R_DES_ACTIVE_1, FEC_X_DES_ACTIVE_1, 2674 FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_2, FEC_QOS_SCHEME, 2675 RMON_T_DROP, RMON_T_PACKETS, RMON_T_BC_PKT, RMON_T_MC_PKT, 2676 RMON_T_CRC_ALIGN, RMON_T_UNDERSIZE, RMON_T_OVERSIZE, RMON_T_FRAG, 2677 RMON_T_JAB, RMON_T_COL, RMON_T_P64, RMON_T_P65TO127, RMON_T_P128TO255, 2678 RMON_T_P256TO511, RMON_T_P512TO1023, RMON_T_P1024TO2047, 2679 RMON_T_P_GTE2048, RMON_T_OCTETS, 2680 IEEE_T_DROP, IEEE_T_FRAME_OK, IEEE_T_1COL, IEEE_T_MCOL, IEEE_T_DEF, 2681 IEEE_T_LCOL, IEEE_T_EXCOL, IEEE_T_MACERR, IEEE_T_CSERR, IEEE_T_SQE, 2682 IEEE_T_FDXFC, IEEE_T_OCTETS_OK, 2683 RMON_R_PACKETS, RMON_R_BC_PKT, RMON_R_MC_PKT, RMON_R_CRC_ALIGN, 2684 RMON_R_UNDERSIZE, RMON_R_OVERSIZE, RMON_R_FRAG, RMON_R_JAB, 2685 RMON_R_RESVD_O, RMON_R_P64, RMON_R_P65TO127, RMON_R_P128TO255, 2686 RMON_R_P256TO511, RMON_R_P512TO1023, RMON_R_P1024TO2047, 2687 RMON_R_P_GTE2048, RMON_R_OCTETS, 2688 IEEE_R_DROP, IEEE_R_FRAME_OK, IEEE_R_CRC, IEEE_R_ALIGN, IEEE_R_MACERR, 2689 IEEE_R_FDXFC, IEEE_R_OCTETS_OK 2690 }; 2691 /* for i.MX6ul */ 2692 static u32 fec_enet_register_offset_6ul[] = { 2693 FEC_IEVENT, FEC_IMASK, FEC_R_DES_ACTIVE_0, FEC_X_DES_ACTIVE_0, 2694 FEC_ECNTRL, FEC_MII_DATA, FEC_MII_SPEED, FEC_MIB_CTRLSTAT, FEC_R_CNTRL, 2695 FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH, FEC_OPD, FEC_TXIC0, FEC_RXIC0, 2696 FEC_HASH_TABLE_HIGH, FEC_HASH_TABLE_LOW, FEC_GRP_HASH_TABLE_HIGH, 2697 FEC_GRP_HASH_TABLE_LOW, FEC_X_WMRK, FEC_R_DES_START_0, 2698 FEC_X_DES_START_0, FEC_R_BUFF_SIZE_0, FEC_R_FIFO_RSFL, FEC_R_FIFO_RSEM, 2699 FEC_R_FIFO_RAEM, FEC_R_FIFO_RAFL, FEC_RACC, 2700 RMON_T_DROP, RMON_T_PACKETS, RMON_T_BC_PKT, RMON_T_MC_PKT, 2701 RMON_T_CRC_ALIGN, RMON_T_UNDERSIZE, RMON_T_OVERSIZE, RMON_T_FRAG, 2702 RMON_T_JAB, RMON_T_COL, RMON_T_P64, RMON_T_P65TO127, RMON_T_P128TO255, 2703 RMON_T_P256TO511, RMON_T_P512TO1023, RMON_T_P1024TO2047, 2704 RMON_T_P_GTE2048, RMON_T_OCTETS, 2705 IEEE_T_DROP, IEEE_T_FRAME_OK, IEEE_T_1COL, IEEE_T_MCOL, IEEE_T_DEF, 2706 IEEE_T_LCOL, IEEE_T_EXCOL, IEEE_T_MACERR, IEEE_T_CSERR, IEEE_T_SQE, 2707 IEEE_T_FDXFC, IEEE_T_OCTETS_OK, 2708 RMON_R_PACKETS, RMON_R_BC_PKT, RMON_R_MC_PKT, RMON_R_CRC_ALIGN, 2709 RMON_R_UNDERSIZE, RMON_R_OVERSIZE, RMON_R_FRAG, RMON_R_JAB, 2710 RMON_R_RESVD_O, RMON_R_P64, RMON_R_P65TO127, RMON_R_P128TO255, 2711 RMON_R_P256TO511, RMON_R_P512TO1023, RMON_R_P1024TO2047, 2712 RMON_R_P_GTE2048, RMON_R_OCTETS, 2713 IEEE_R_DROP, IEEE_R_FRAME_OK, IEEE_R_CRC, IEEE_R_ALIGN, IEEE_R_MACERR, 2714 IEEE_R_FDXFC, IEEE_R_OCTETS_OK 2715 }; 2716 #else 2717 static __u32 fec_enet_register_version = 1; 2718 static u32 fec_enet_register_offset[] = { 2719 FEC_ECNTRL, FEC_IEVENT, FEC_IMASK, FEC_IVEC, FEC_R_DES_ACTIVE_0, 2720 FEC_R_DES_ACTIVE_1, FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_0, 2721 FEC_X_DES_ACTIVE_1, FEC_X_DES_ACTIVE_2, FEC_MII_DATA, FEC_MII_SPEED, 2722 FEC_R_BOUND, FEC_R_FSTART, FEC_X_WMRK, FEC_X_FSTART, FEC_R_CNTRL, 2723 FEC_MAX_FRM_LEN, FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH, 2724 FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW, FEC_R_DES_START_0, 2725 FEC_R_DES_START_1, FEC_R_DES_START_2, FEC_X_DES_START_0, 2726 FEC_X_DES_START_1, FEC_X_DES_START_2, FEC_R_BUFF_SIZE_0, 2727 FEC_R_BUFF_SIZE_1, FEC_R_BUFF_SIZE_2 2728 }; 2729 #endif 2730 2731 static void fec_enet_get_regs(struct net_device *ndev, 2732 struct ethtool_regs *regs, void *regbuf) 2733 { 2734 struct fec_enet_private *fep = netdev_priv(ndev); 2735 u32 __iomem *theregs = (u32 __iomem *)fep->hwp; 2736 struct device *dev = &fep->pdev->dev; 2737 u32 *buf = (u32 *)regbuf; 2738 u32 i, off; 2739 int ret; 2740 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ 2741 defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \ 2742 defined(CONFIG_ARM64) || defined(CONFIG_COMPILE_TEST) 2743 u32 *reg_list; 2744 u32 reg_cnt; 2745 2746 if (!of_machine_is_compatible("fsl,imx6ul")) { 2747 reg_list = fec_enet_register_offset; 2748 reg_cnt = ARRAY_SIZE(fec_enet_register_offset); 2749 } else { 2750 reg_list = fec_enet_register_offset_6ul; 2751 reg_cnt = ARRAY_SIZE(fec_enet_register_offset_6ul); 2752 } 2753 #else 2754 /* coldfire */ 2755 static u32 *reg_list = fec_enet_register_offset; 2756 static const u32 reg_cnt = ARRAY_SIZE(fec_enet_register_offset); 2757 #endif 2758 ret = pm_runtime_resume_and_get(dev); 2759 if (ret < 0) 2760 return; 2761 2762 regs->version = fec_enet_register_version; 2763 2764 memset(buf, 0, regs->len); 2765 2766 for (i = 0; i < reg_cnt; i++) { 2767 off = reg_list[i]; 2768 2769 if ((off == FEC_R_BOUND || off == FEC_R_FSTART) && 2770 !(fep->quirks & FEC_QUIRK_HAS_FRREG)) 2771 continue; 2772 2773 off >>= 2; 2774 buf[off] = readl(&theregs[off]); 2775 } 2776 2777 pm_runtime_mark_last_busy(dev); 2778 pm_runtime_put_autosuspend(dev); 2779 } 2780 2781 static int fec_enet_get_ts_info(struct net_device *ndev, 2782 struct kernel_ethtool_ts_info *info) 2783 { 2784 struct fec_enet_private *fep = netdev_priv(ndev); 2785 2786 if (fep->bufdesc_ex) { 2787 2788 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | 2789 SOF_TIMESTAMPING_TX_HARDWARE | 2790 SOF_TIMESTAMPING_RX_HARDWARE | 2791 SOF_TIMESTAMPING_RAW_HARDWARE; 2792 if (fep->ptp_clock) 2793 info->phc_index = ptp_clock_index(fep->ptp_clock); 2794 2795 info->tx_types = (1 << HWTSTAMP_TX_OFF) | 2796 (1 << HWTSTAMP_TX_ON); 2797 2798 info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | 2799 (1 << HWTSTAMP_FILTER_ALL); 2800 return 0; 2801 } else { 2802 return ethtool_op_get_ts_info(ndev, info); 2803 } 2804 } 2805 2806 #if !defined(CONFIG_M5272) 2807 2808 static void fec_enet_get_pauseparam(struct net_device *ndev, 2809 struct ethtool_pauseparam *pause) 2810 { 2811 struct fec_enet_private *fep = netdev_priv(ndev); 2812 2813 pause->autoneg = (fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) != 0; 2814 pause->tx_pause = (fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) != 0; 2815 pause->rx_pause = pause->tx_pause; 2816 } 2817 2818 static int fec_enet_set_pauseparam(struct net_device *ndev, 2819 struct ethtool_pauseparam *pause) 2820 { 2821 struct fec_enet_private *fep = netdev_priv(ndev); 2822 2823 if (!ndev->phydev) 2824 return -ENODEV; 2825 2826 if (pause->tx_pause != pause->rx_pause) { 2827 netdev_info(ndev, 2828 "hardware only support enable/disable both tx and rx"); 2829 return -EINVAL; 2830 } 2831 2832 fep->pause_flag = 0; 2833 2834 /* tx pause must be same as rx pause */ 2835 fep->pause_flag |= pause->rx_pause ? FEC_PAUSE_FLAG_ENABLE : 0; 2836 fep->pause_flag |= pause->autoneg ? FEC_PAUSE_FLAG_AUTONEG : 0; 2837 2838 phy_set_sym_pause(ndev->phydev, pause->rx_pause, pause->tx_pause, 2839 pause->autoneg); 2840 2841 if (pause->autoneg) { 2842 if (netif_running(ndev)) 2843 fec_stop(ndev); 2844 phy_start_aneg(ndev->phydev); 2845 } 2846 if (netif_running(ndev)) { 2847 napi_disable(&fep->napi); 2848 netif_tx_lock_bh(ndev); 2849 fec_restart(ndev); 2850 netif_tx_wake_all_queues(ndev); 2851 netif_tx_unlock_bh(ndev); 2852 napi_enable(&fep->napi); 2853 } 2854 2855 return 0; 2856 } 2857 2858 static const struct fec_stat { 2859 char name[ETH_GSTRING_LEN]; 2860 u16 offset; 2861 } fec_stats[] = { 2862 /* RMON TX */ 2863 { "tx_dropped", RMON_T_DROP }, 2864 { "tx_packets", RMON_T_PACKETS }, 2865 { "tx_broadcast", RMON_T_BC_PKT }, 2866 { "tx_multicast", RMON_T_MC_PKT }, 2867 { "tx_crc_errors", RMON_T_CRC_ALIGN }, 2868 { "tx_undersize", RMON_T_UNDERSIZE }, 2869 { "tx_oversize", RMON_T_OVERSIZE }, 2870 { "tx_fragment", RMON_T_FRAG }, 2871 { "tx_jabber", RMON_T_JAB }, 2872 { "tx_collision", RMON_T_COL }, 2873 { "tx_64byte", RMON_T_P64 }, 2874 { "tx_65to127byte", RMON_T_P65TO127 }, 2875 { "tx_128to255byte", RMON_T_P128TO255 }, 2876 { "tx_256to511byte", RMON_T_P256TO511 }, 2877 { "tx_512to1023byte", RMON_T_P512TO1023 }, 2878 { "tx_1024to2047byte", RMON_T_P1024TO2047 }, 2879 { "tx_GTE2048byte", RMON_T_P_GTE2048 }, 2880 { "tx_octets", RMON_T_OCTETS }, 2881 2882 /* IEEE TX */ 2883 { "IEEE_tx_drop", IEEE_T_DROP }, 2884 { "IEEE_tx_frame_ok", IEEE_T_FRAME_OK }, 2885 { "IEEE_tx_1col", IEEE_T_1COL }, 2886 { "IEEE_tx_mcol", IEEE_T_MCOL }, 2887 { "IEEE_tx_def", IEEE_T_DEF }, 2888 { "IEEE_tx_lcol", IEEE_T_LCOL }, 2889 { "IEEE_tx_excol", IEEE_T_EXCOL }, 2890 { "IEEE_tx_macerr", IEEE_T_MACERR }, 2891 { "IEEE_tx_cserr", IEEE_T_CSERR }, 2892 { "IEEE_tx_sqe", IEEE_T_SQE }, 2893 { "IEEE_tx_fdxfc", IEEE_T_FDXFC }, 2894 { "IEEE_tx_octets_ok", IEEE_T_OCTETS_OK }, 2895 2896 /* RMON RX */ 2897 { "rx_packets", RMON_R_PACKETS }, 2898 { "rx_broadcast", RMON_R_BC_PKT }, 2899 { "rx_multicast", RMON_R_MC_PKT }, 2900 { "rx_crc_errors", RMON_R_CRC_ALIGN }, 2901 { "rx_undersize", RMON_R_UNDERSIZE }, 2902 { "rx_oversize", RMON_R_OVERSIZE }, 2903 { "rx_fragment", RMON_R_FRAG }, 2904 { "rx_jabber", RMON_R_JAB }, 2905 { "rx_64byte", RMON_R_P64 }, 2906 { "rx_65to127byte", RMON_R_P65TO127 }, 2907 { "rx_128to255byte", RMON_R_P128TO255 }, 2908 { "rx_256to511byte", RMON_R_P256TO511 }, 2909 { "rx_512to1023byte", RMON_R_P512TO1023 }, 2910 { "rx_1024to2047byte", RMON_R_P1024TO2047 }, 2911 { "rx_GTE2048byte", RMON_R_P_GTE2048 }, 2912 { "rx_octets", RMON_R_OCTETS }, 2913 2914 /* IEEE RX */ 2915 { "IEEE_rx_drop", IEEE_R_DROP }, 2916 { "IEEE_rx_frame_ok", IEEE_R_FRAME_OK }, 2917 { "IEEE_rx_crc", IEEE_R_CRC }, 2918 { "IEEE_rx_align", IEEE_R_ALIGN }, 2919 { "IEEE_rx_macerr", IEEE_R_MACERR }, 2920 { "IEEE_rx_fdxfc", IEEE_R_FDXFC }, 2921 { "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK }, 2922 }; 2923 2924 #define FEC_STATS_SIZE (ARRAY_SIZE(fec_stats) * sizeof(u64)) 2925 2926 static const char *fec_xdp_stat_strs[XDP_STATS_TOTAL] = { 2927 "rx_xdp_redirect", /* RX_XDP_REDIRECT = 0, */ 2928 "rx_xdp_pass", /* RX_XDP_PASS, */ 2929 "rx_xdp_drop", /* RX_XDP_DROP, */ 2930 "rx_xdp_tx", /* RX_XDP_TX, */ 2931 "rx_xdp_tx_errors", /* RX_XDP_TX_ERRORS, */ 2932 "tx_xdp_xmit", /* TX_XDP_XMIT, */ 2933 "tx_xdp_xmit_errors", /* TX_XDP_XMIT_ERRORS, */ 2934 }; 2935 2936 static void fec_enet_update_ethtool_stats(struct net_device *dev) 2937 { 2938 struct fec_enet_private *fep = netdev_priv(dev); 2939 int i; 2940 2941 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 2942 fep->ethtool_stats[i] = readl(fep->hwp + fec_stats[i].offset); 2943 } 2944 2945 static void fec_enet_get_xdp_stats(struct fec_enet_private *fep, u64 *data) 2946 { 2947 u64 xdp_stats[XDP_STATS_TOTAL] = { 0 }; 2948 struct fec_enet_priv_rx_q *rxq; 2949 int i, j; 2950 2951 for (i = fep->num_rx_queues - 1; i >= 0; i--) { 2952 rxq = fep->rx_queue[i]; 2953 2954 for (j = 0; j < XDP_STATS_TOTAL; j++) 2955 xdp_stats[j] += rxq->stats[j]; 2956 } 2957 2958 memcpy(data, xdp_stats, sizeof(xdp_stats)); 2959 } 2960 2961 static void fec_enet_page_pool_stats(struct fec_enet_private *fep, u64 *data) 2962 { 2963 #ifdef CONFIG_PAGE_POOL_STATS 2964 struct page_pool_stats stats = {}; 2965 struct fec_enet_priv_rx_q *rxq; 2966 int i; 2967 2968 for (i = fep->num_rx_queues - 1; i >= 0; i--) { 2969 rxq = fep->rx_queue[i]; 2970 2971 if (!rxq->page_pool) 2972 continue; 2973 2974 page_pool_get_stats(rxq->page_pool, &stats); 2975 } 2976 2977 page_pool_ethtool_stats_get(data, &stats); 2978 #endif 2979 } 2980 2981 static void fec_enet_get_ethtool_stats(struct net_device *dev, 2982 struct ethtool_stats *stats, u64 *data) 2983 { 2984 struct fec_enet_private *fep = netdev_priv(dev); 2985 2986 if (netif_running(dev)) 2987 fec_enet_update_ethtool_stats(dev); 2988 2989 memcpy(data, fep->ethtool_stats, FEC_STATS_SIZE); 2990 data += FEC_STATS_SIZE / sizeof(u64); 2991 2992 fec_enet_get_xdp_stats(fep, data); 2993 data += XDP_STATS_TOTAL; 2994 2995 fec_enet_page_pool_stats(fep, data); 2996 } 2997 2998 static void fec_enet_get_strings(struct net_device *netdev, 2999 u32 stringset, u8 *data) 3000 { 3001 int i; 3002 switch (stringset) { 3003 case ETH_SS_STATS: 3004 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) { 3005 ethtool_puts(&data, fec_stats[i].name); 3006 } 3007 for (i = 0; i < ARRAY_SIZE(fec_xdp_stat_strs); i++) { 3008 ethtool_puts(&data, fec_xdp_stat_strs[i]); 3009 } 3010 page_pool_ethtool_stats_get_strings(data); 3011 3012 break; 3013 case ETH_SS_TEST: 3014 net_selftest_get_strings(data); 3015 break; 3016 } 3017 } 3018 3019 static int fec_enet_get_sset_count(struct net_device *dev, int sset) 3020 { 3021 int count; 3022 3023 switch (sset) { 3024 case ETH_SS_STATS: 3025 count = ARRAY_SIZE(fec_stats) + XDP_STATS_TOTAL; 3026 count += page_pool_ethtool_stats_get_count(); 3027 return count; 3028 3029 case ETH_SS_TEST: 3030 return net_selftest_get_count(); 3031 default: 3032 return -EOPNOTSUPP; 3033 } 3034 } 3035 3036 static void fec_enet_clear_ethtool_stats(struct net_device *dev) 3037 { 3038 struct fec_enet_private *fep = netdev_priv(dev); 3039 struct fec_enet_priv_rx_q *rxq; 3040 int i, j; 3041 3042 /* Disable MIB statistics counters */ 3043 writel(FEC_MIB_CTRLSTAT_DISABLE, fep->hwp + FEC_MIB_CTRLSTAT); 3044 3045 for (i = 0; i < ARRAY_SIZE(fec_stats); i++) 3046 writel(0, fep->hwp + fec_stats[i].offset); 3047 3048 for (i = fep->num_rx_queues - 1; i >= 0; i--) { 3049 rxq = fep->rx_queue[i]; 3050 for (j = 0; j < XDP_STATS_TOTAL; j++) 3051 rxq->stats[j] = 0; 3052 } 3053 3054 /* Don't disable MIB statistics counters */ 3055 writel(0, fep->hwp + FEC_MIB_CTRLSTAT); 3056 } 3057 3058 #else /* !defined(CONFIG_M5272) */ 3059 #define FEC_STATS_SIZE 0 3060 static inline void fec_enet_update_ethtool_stats(struct net_device *dev) 3061 { 3062 } 3063 3064 static inline void fec_enet_clear_ethtool_stats(struct net_device *dev) 3065 { 3066 } 3067 #endif /* !defined(CONFIG_M5272) */ 3068 3069 /* ITR clock source is enet system clock (clk_ahb). 3070 * TCTT unit is cycle_ns * 64 cycle 3071 * So, the ICTT value = X us / (cycle_ns * 64) 3072 */ 3073 static int fec_enet_us_to_itr_clock(struct net_device *ndev, int us) 3074 { 3075 struct fec_enet_private *fep = netdev_priv(ndev); 3076 3077 return us * (fep->itr_clk_rate / 64000) / 1000; 3078 } 3079 3080 /* Set threshold for interrupt coalescing */ 3081 static void fec_enet_itr_coal_set(struct net_device *ndev) 3082 { 3083 struct fec_enet_private *fep = netdev_priv(ndev); 3084 int rx_itr, tx_itr; 3085 3086 /* Must be greater than zero to avoid unpredictable behavior */ 3087 if (!fep->rx_time_itr || !fep->rx_pkts_itr || 3088 !fep->tx_time_itr || !fep->tx_pkts_itr) 3089 return; 3090 3091 /* Select enet system clock as Interrupt Coalescing 3092 * timer Clock Source 3093 */ 3094 rx_itr = FEC_ITR_CLK_SEL; 3095 tx_itr = FEC_ITR_CLK_SEL; 3096 3097 /* set ICFT and ICTT */ 3098 rx_itr |= FEC_ITR_ICFT(fep->rx_pkts_itr); 3099 rx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr)); 3100 tx_itr |= FEC_ITR_ICFT(fep->tx_pkts_itr); 3101 tx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr)); 3102 3103 rx_itr |= FEC_ITR_EN; 3104 tx_itr |= FEC_ITR_EN; 3105 3106 writel(tx_itr, fep->hwp + FEC_TXIC0); 3107 writel(rx_itr, fep->hwp + FEC_RXIC0); 3108 if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES) { 3109 writel(tx_itr, fep->hwp + FEC_TXIC1); 3110 writel(rx_itr, fep->hwp + FEC_RXIC1); 3111 writel(tx_itr, fep->hwp + FEC_TXIC2); 3112 writel(rx_itr, fep->hwp + FEC_RXIC2); 3113 } 3114 } 3115 3116 static int fec_enet_get_coalesce(struct net_device *ndev, 3117 struct ethtool_coalesce *ec, 3118 struct kernel_ethtool_coalesce *kernel_coal, 3119 struct netlink_ext_ack *extack) 3120 { 3121 struct fec_enet_private *fep = netdev_priv(ndev); 3122 3123 if (!(fep->quirks & FEC_QUIRK_HAS_COALESCE)) 3124 return -EOPNOTSUPP; 3125 3126 ec->rx_coalesce_usecs = fep->rx_time_itr; 3127 ec->rx_max_coalesced_frames = fep->rx_pkts_itr; 3128 3129 ec->tx_coalesce_usecs = fep->tx_time_itr; 3130 ec->tx_max_coalesced_frames = fep->tx_pkts_itr; 3131 3132 return 0; 3133 } 3134 3135 static int fec_enet_set_coalesce(struct net_device *ndev, 3136 struct ethtool_coalesce *ec, 3137 struct kernel_ethtool_coalesce *kernel_coal, 3138 struct netlink_ext_ack *extack) 3139 { 3140 struct fec_enet_private *fep = netdev_priv(ndev); 3141 struct device *dev = &fep->pdev->dev; 3142 unsigned int cycle; 3143 3144 if (!(fep->quirks & FEC_QUIRK_HAS_COALESCE)) 3145 return -EOPNOTSUPP; 3146 3147 if (ec->rx_max_coalesced_frames > 255) { 3148 dev_err(dev, "Rx coalesced frames exceed hardware limitation\n"); 3149 return -EINVAL; 3150 } 3151 3152 if (ec->tx_max_coalesced_frames > 255) { 3153 dev_err(dev, "Tx coalesced frame exceed hardware limitation\n"); 3154 return -EINVAL; 3155 } 3156 3157 cycle = fec_enet_us_to_itr_clock(ndev, ec->rx_coalesce_usecs); 3158 if (cycle > 0xFFFF) { 3159 dev_err(dev, "Rx coalesced usec exceed hardware limitation\n"); 3160 return -EINVAL; 3161 } 3162 3163 cycle = fec_enet_us_to_itr_clock(ndev, ec->tx_coalesce_usecs); 3164 if (cycle > 0xFFFF) { 3165 dev_err(dev, "Tx coalesced usec exceed hardware limitation\n"); 3166 return -EINVAL; 3167 } 3168 3169 fep->rx_time_itr = ec->rx_coalesce_usecs; 3170 fep->rx_pkts_itr = ec->rx_max_coalesced_frames; 3171 3172 fep->tx_time_itr = ec->tx_coalesce_usecs; 3173 fep->tx_pkts_itr = ec->tx_max_coalesced_frames; 3174 3175 fec_enet_itr_coal_set(ndev); 3176 3177 return 0; 3178 } 3179 3180 static int 3181 fec_enet_get_eee(struct net_device *ndev, struct ethtool_keee *edata) 3182 { 3183 struct fec_enet_private *fep = netdev_priv(ndev); 3184 struct ethtool_keee *p = &fep->eee; 3185 3186 if (!(fep->quirks & FEC_QUIRK_HAS_EEE)) 3187 return -EOPNOTSUPP; 3188 3189 if (!netif_running(ndev)) 3190 return -ENETDOWN; 3191 3192 edata->tx_lpi_timer = p->tx_lpi_timer; 3193 3194 return phy_ethtool_get_eee(ndev->phydev, edata); 3195 } 3196 3197 static int 3198 fec_enet_set_eee(struct net_device *ndev, struct ethtool_keee *edata) 3199 { 3200 struct fec_enet_private *fep = netdev_priv(ndev); 3201 struct ethtool_keee *p = &fep->eee; 3202 3203 if (!(fep->quirks & FEC_QUIRK_HAS_EEE)) 3204 return -EOPNOTSUPP; 3205 3206 if (!netif_running(ndev)) 3207 return -ENETDOWN; 3208 3209 p->tx_lpi_timer = edata->tx_lpi_timer; 3210 3211 return phy_ethtool_set_eee(ndev->phydev, edata); 3212 } 3213 3214 static void 3215 fec_enet_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol) 3216 { 3217 struct fec_enet_private *fep = netdev_priv(ndev); 3218 3219 if (fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET) { 3220 wol->supported = WAKE_MAGIC; 3221 wol->wolopts = fep->wol_flag & FEC_WOL_FLAG_ENABLE ? WAKE_MAGIC : 0; 3222 } else { 3223 wol->supported = wol->wolopts = 0; 3224 } 3225 } 3226 3227 static int 3228 fec_enet_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol) 3229 { 3230 struct fec_enet_private *fep = netdev_priv(ndev); 3231 3232 if (!(fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET)) 3233 return -EINVAL; 3234 3235 if (wol->wolopts & ~WAKE_MAGIC) 3236 return -EINVAL; 3237 3238 device_set_wakeup_enable(&ndev->dev, wol->wolopts & WAKE_MAGIC); 3239 if (device_may_wakeup(&ndev->dev)) 3240 fep->wol_flag |= FEC_WOL_FLAG_ENABLE; 3241 else 3242 fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE); 3243 3244 return 0; 3245 } 3246 3247 static const struct ethtool_ops fec_enet_ethtool_ops = { 3248 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 3249 ETHTOOL_COALESCE_MAX_FRAMES, 3250 .get_drvinfo = fec_enet_get_drvinfo, 3251 .get_regs_len = fec_enet_get_regs_len, 3252 .get_regs = fec_enet_get_regs, 3253 .nway_reset = phy_ethtool_nway_reset, 3254 .get_link = ethtool_op_get_link, 3255 .get_coalesce = fec_enet_get_coalesce, 3256 .set_coalesce = fec_enet_set_coalesce, 3257 #ifndef CONFIG_M5272 3258 .get_pauseparam = fec_enet_get_pauseparam, 3259 .set_pauseparam = fec_enet_set_pauseparam, 3260 .get_strings = fec_enet_get_strings, 3261 .get_ethtool_stats = fec_enet_get_ethtool_stats, 3262 .get_sset_count = fec_enet_get_sset_count, 3263 #endif 3264 .get_ts_info = fec_enet_get_ts_info, 3265 .get_wol = fec_enet_get_wol, 3266 .set_wol = fec_enet_set_wol, 3267 .get_eee = fec_enet_get_eee, 3268 .set_eee = fec_enet_set_eee, 3269 .get_link_ksettings = phy_ethtool_get_link_ksettings, 3270 .set_link_ksettings = phy_ethtool_set_link_ksettings, 3271 .self_test = net_selftest, 3272 }; 3273 3274 static void fec_enet_free_buffers(struct net_device *ndev) 3275 { 3276 struct fec_enet_private *fep = netdev_priv(ndev); 3277 unsigned int i; 3278 struct fec_enet_priv_tx_q *txq; 3279 struct fec_enet_priv_rx_q *rxq; 3280 unsigned int q; 3281 3282 for (q = 0; q < fep->num_rx_queues; q++) { 3283 rxq = fep->rx_queue[q]; 3284 for (i = 0; i < rxq->bd.ring_size; i++) 3285 page_pool_put_full_page(rxq->page_pool, rxq->rx_skb_info[i].page, false); 3286 3287 for (i = 0; i < XDP_STATS_TOTAL; i++) 3288 rxq->stats[i] = 0; 3289 3290 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq)) 3291 xdp_rxq_info_unreg(&rxq->xdp_rxq); 3292 page_pool_destroy(rxq->page_pool); 3293 rxq->page_pool = NULL; 3294 } 3295 3296 for (q = 0; q < fep->num_tx_queues; q++) { 3297 txq = fep->tx_queue[q]; 3298 for (i = 0; i < txq->bd.ring_size; i++) { 3299 kfree(txq->tx_bounce[i]); 3300 txq->tx_bounce[i] = NULL; 3301 3302 if (!txq->tx_buf[i].buf_p) { 3303 txq->tx_buf[i].type = FEC_TXBUF_T_SKB; 3304 continue; 3305 } 3306 3307 if (txq->tx_buf[i].type == FEC_TXBUF_T_SKB) { 3308 dev_kfree_skb(txq->tx_buf[i].buf_p); 3309 } else if (txq->tx_buf[i].type == FEC_TXBUF_T_XDP_NDO) { 3310 xdp_return_frame(txq->tx_buf[i].buf_p); 3311 } else { 3312 struct page *page = txq->tx_buf[i].buf_p; 3313 3314 page_pool_put_page(page->pp, page, 0, false); 3315 } 3316 3317 txq->tx_buf[i].buf_p = NULL; 3318 txq->tx_buf[i].type = FEC_TXBUF_T_SKB; 3319 } 3320 } 3321 } 3322 3323 static void fec_enet_free_queue(struct net_device *ndev) 3324 { 3325 struct fec_enet_private *fep = netdev_priv(ndev); 3326 int i; 3327 struct fec_enet_priv_tx_q *txq; 3328 3329 for (i = 0; i < fep->num_tx_queues; i++) 3330 if (fep->tx_queue[i] && fep->tx_queue[i]->tso_hdrs) { 3331 txq = fep->tx_queue[i]; 3332 fec_dma_free(&fep->pdev->dev, 3333 txq->bd.ring_size * TSO_HEADER_SIZE, 3334 txq->tso_hdrs, txq->tso_hdrs_dma); 3335 } 3336 3337 for (i = 0; i < fep->num_rx_queues; i++) 3338 kfree(fep->rx_queue[i]); 3339 for (i = 0; i < fep->num_tx_queues; i++) 3340 kfree(fep->tx_queue[i]); 3341 } 3342 3343 static int fec_enet_alloc_queue(struct net_device *ndev) 3344 { 3345 struct fec_enet_private *fep = netdev_priv(ndev); 3346 int i; 3347 int ret = 0; 3348 struct fec_enet_priv_tx_q *txq; 3349 3350 for (i = 0; i < fep->num_tx_queues; i++) { 3351 txq = kzalloc(sizeof(*txq), GFP_KERNEL); 3352 if (!txq) { 3353 ret = -ENOMEM; 3354 goto alloc_failed; 3355 } 3356 3357 fep->tx_queue[i] = txq; 3358 txq->bd.ring_size = TX_RING_SIZE; 3359 fep->total_tx_ring_size += fep->tx_queue[i]->bd.ring_size; 3360 3361 txq->tx_stop_threshold = FEC_MAX_SKB_DESCS; 3362 txq->tx_wake_threshold = FEC_MAX_SKB_DESCS + 2 * MAX_SKB_FRAGS; 3363 3364 txq->tso_hdrs = fec_dma_alloc(&fep->pdev->dev, 3365 txq->bd.ring_size * TSO_HEADER_SIZE, 3366 &txq->tso_hdrs_dma, GFP_KERNEL); 3367 if (!txq->tso_hdrs) { 3368 ret = -ENOMEM; 3369 goto alloc_failed; 3370 } 3371 } 3372 3373 for (i = 0; i < fep->num_rx_queues; i++) { 3374 fep->rx_queue[i] = kzalloc(sizeof(*fep->rx_queue[i]), 3375 GFP_KERNEL); 3376 if (!fep->rx_queue[i]) { 3377 ret = -ENOMEM; 3378 goto alloc_failed; 3379 } 3380 3381 fep->rx_queue[i]->bd.ring_size = RX_RING_SIZE; 3382 fep->total_rx_ring_size += fep->rx_queue[i]->bd.ring_size; 3383 } 3384 return ret; 3385 3386 alloc_failed: 3387 fec_enet_free_queue(ndev); 3388 return ret; 3389 } 3390 3391 static int 3392 fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue) 3393 { 3394 struct fec_enet_private *fep = netdev_priv(ndev); 3395 struct fec_enet_priv_rx_q *rxq; 3396 dma_addr_t phys_addr; 3397 struct bufdesc *bdp; 3398 struct page *page; 3399 int i, err; 3400 3401 rxq = fep->rx_queue[queue]; 3402 bdp = rxq->bd.base; 3403 3404 err = fec_enet_create_page_pool(fep, rxq, rxq->bd.ring_size); 3405 if (err < 0) { 3406 netdev_err(ndev, "%s failed queue %d (%d)\n", __func__, queue, err); 3407 return err; 3408 } 3409 3410 for (i = 0; i < rxq->bd.ring_size; i++) { 3411 page = page_pool_dev_alloc_pages(rxq->page_pool); 3412 if (!page) 3413 goto err_alloc; 3414 3415 phys_addr = page_pool_get_dma_addr(page) + FEC_ENET_XDP_HEADROOM; 3416 bdp->cbd_bufaddr = cpu_to_fec32(phys_addr); 3417 3418 rxq->rx_skb_info[i].page = page; 3419 rxq->rx_skb_info[i].offset = FEC_ENET_XDP_HEADROOM; 3420 bdp->cbd_sc = cpu_to_fec16(BD_ENET_RX_EMPTY); 3421 3422 if (fep->bufdesc_ex) { 3423 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 3424 ebdp->cbd_esc = cpu_to_fec32(BD_ENET_RX_INT); 3425 } 3426 3427 bdp = fec_enet_get_nextdesc(bdp, &rxq->bd); 3428 } 3429 3430 /* Set the last buffer to wrap. */ 3431 bdp = fec_enet_get_prevdesc(bdp, &rxq->bd); 3432 bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP); 3433 return 0; 3434 3435 err_alloc: 3436 fec_enet_free_buffers(ndev); 3437 return -ENOMEM; 3438 } 3439 3440 static int 3441 fec_enet_alloc_txq_buffers(struct net_device *ndev, unsigned int queue) 3442 { 3443 struct fec_enet_private *fep = netdev_priv(ndev); 3444 unsigned int i; 3445 struct bufdesc *bdp; 3446 struct fec_enet_priv_tx_q *txq; 3447 3448 txq = fep->tx_queue[queue]; 3449 bdp = txq->bd.base; 3450 for (i = 0; i < txq->bd.ring_size; i++) { 3451 txq->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL); 3452 if (!txq->tx_bounce[i]) 3453 goto err_alloc; 3454 3455 bdp->cbd_sc = cpu_to_fec16(0); 3456 bdp->cbd_bufaddr = cpu_to_fec32(0); 3457 3458 if (fep->bufdesc_ex) { 3459 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 3460 ebdp->cbd_esc = cpu_to_fec32(BD_ENET_TX_INT); 3461 } 3462 3463 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 3464 } 3465 3466 /* Set the last buffer to wrap. */ 3467 bdp = fec_enet_get_prevdesc(bdp, &txq->bd); 3468 bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP); 3469 3470 return 0; 3471 3472 err_alloc: 3473 fec_enet_free_buffers(ndev); 3474 return -ENOMEM; 3475 } 3476 3477 static int fec_enet_alloc_buffers(struct net_device *ndev) 3478 { 3479 struct fec_enet_private *fep = netdev_priv(ndev); 3480 unsigned int i; 3481 3482 for (i = 0; i < fep->num_rx_queues; i++) 3483 if (fec_enet_alloc_rxq_buffers(ndev, i)) 3484 return -ENOMEM; 3485 3486 for (i = 0; i < fep->num_tx_queues; i++) 3487 if (fec_enet_alloc_txq_buffers(ndev, i)) 3488 return -ENOMEM; 3489 return 0; 3490 } 3491 3492 static int 3493 fec_enet_open(struct net_device *ndev) 3494 { 3495 struct fec_enet_private *fep = netdev_priv(ndev); 3496 int ret; 3497 bool reset_again; 3498 3499 ret = pm_runtime_resume_and_get(&fep->pdev->dev); 3500 if (ret < 0) 3501 return ret; 3502 3503 pinctrl_pm_select_default_state(&fep->pdev->dev); 3504 ret = fec_enet_clk_enable(ndev, true); 3505 if (ret) 3506 goto clk_enable; 3507 3508 /* During the first fec_enet_open call the PHY isn't probed at this 3509 * point. Therefore the phy_reset_after_clk_enable() call within 3510 * fec_enet_clk_enable() fails. As we need this reset in order to be 3511 * sure the PHY is working correctly we check if we need to reset again 3512 * later when the PHY is probed 3513 */ 3514 if (ndev->phydev && ndev->phydev->drv) 3515 reset_again = false; 3516 else 3517 reset_again = true; 3518 3519 /* I should reset the ring buffers here, but I don't yet know 3520 * a simple way to do that. 3521 */ 3522 3523 ret = fec_enet_alloc_buffers(ndev); 3524 if (ret) 3525 goto err_enet_alloc; 3526 3527 /* Init MAC prior to mii bus probe */ 3528 fec_restart(ndev); 3529 3530 /* Call phy_reset_after_clk_enable() again if it failed during 3531 * phy_reset_after_clk_enable() before because the PHY wasn't probed. 3532 */ 3533 if (reset_again) 3534 fec_enet_phy_reset_after_clk_enable(ndev); 3535 3536 /* Probe and connect to PHY when open the interface */ 3537 ret = fec_enet_mii_probe(ndev); 3538 if (ret) 3539 goto err_enet_mii_probe; 3540 3541 if (fep->quirks & FEC_QUIRK_ERR006687) 3542 imx6q_cpuidle_fec_irqs_used(); 3543 3544 if (fep->quirks & FEC_QUIRK_HAS_PMQOS) 3545 cpu_latency_qos_add_request(&fep->pm_qos_req, 0); 3546 3547 napi_enable(&fep->napi); 3548 phy_start(ndev->phydev); 3549 netif_tx_start_all_queues(ndev); 3550 3551 device_set_wakeup_enable(&ndev->dev, fep->wol_flag & 3552 FEC_WOL_FLAG_ENABLE); 3553 3554 return 0; 3555 3556 err_enet_mii_probe: 3557 fec_enet_free_buffers(ndev); 3558 err_enet_alloc: 3559 fec_enet_clk_enable(ndev, false); 3560 clk_enable: 3561 pm_runtime_mark_last_busy(&fep->pdev->dev); 3562 pm_runtime_put_autosuspend(&fep->pdev->dev); 3563 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 3564 return ret; 3565 } 3566 3567 static int 3568 fec_enet_close(struct net_device *ndev) 3569 { 3570 struct fec_enet_private *fep = netdev_priv(ndev); 3571 3572 phy_stop(ndev->phydev); 3573 3574 if (netif_device_present(ndev)) { 3575 napi_disable(&fep->napi); 3576 netif_tx_disable(ndev); 3577 fec_stop(ndev); 3578 } 3579 3580 phy_disconnect(ndev->phydev); 3581 3582 if (fep->quirks & FEC_QUIRK_ERR006687) 3583 imx6q_cpuidle_fec_irqs_unused(); 3584 3585 fec_enet_update_ethtool_stats(ndev); 3586 3587 fec_enet_clk_enable(ndev, false); 3588 if (fep->quirks & FEC_QUIRK_HAS_PMQOS) 3589 cpu_latency_qos_remove_request(&fep->pm_qos_req); 3590 3591 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 3592 pm_runtime_mark_last_busy(&fep->pdev->dev); 3593 pm_runtime_put_autosuspend(&fep->pdev->dev); 3594 3595 fec_enet_free_buffers(ndev); 3596 3597 return 0; 3598 } 3599 3600 /* Set or clear the multicast filter for this adaptor. 3601 * Skeleton taken from sunlance driver. 3602 * The CPM Ethernet implementation allows Multicast as well as individual 3603 * MAC address filtering. Some of the drivers check to make sure it is 3604 * a group multicast address, and discard those that are not. I guess I 3605 * will do the same for now, but just remove the test if you want 3606 * individual filtering as well (do the upper net layers want or support 3607 * this kind of feature?). 3608 */ 3609 3610 #define FEC_HASH_BITS 6 /* #bits in hash */ 3611 3612 static void set_multicast_list(struct net_device *ndev) 3613 { 3614 struct fec_enet_private *fep = netdev_priv(ndev); 3615 struct netdev_hw_addr *ha; 3616 unsigned int crc, tmp; 3617 unsigned char hash; 3618 unsigned int hash_high = 0, hash_low = 0; 3619 3620 if (ndev->flags & IFF_PROMISC) { 3621 tmp = readl(fep->hwp + FEC_R_CNTRL); 3622 tmp |= 0x8; 3623 writel(tmp, fep->hwp + FEC_R_CNTRL); 3624 return; 3625 } 3626 3627 tmp = readl(fep->hwp + FEC_R_CNTRL); 3628 tmp &= ~0x8; 3629 writel(tmp, fep->hwp + FEC_R_CNTRL); 3630 3631 if (ndev->flags & IFF_ALLMULTI) { 3632 /* Catch all multicast addresses, so set the 3633 * filter to all 1's 3634 */ 3635 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 3636 writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 3637 3638 return; 3639 } 3640 3641 /* Add the addresses in hash register */ 3642 netdev_for_each_mc_addr(ha, ndev) { 3643 /* calculate crc32 value of mac address */ 3644 crc = ether_crc_le(ndev->addr_len, ha->addr); 3645 3646 /* only upper 6 bits (FEC_HASH_BITS) are used 3647 * which point to specific bit in the hash registers 3648 */ 3649 hash = (crc >> (32 - FEC_HASH_BITS)) & 0x3f; 3650 3651 if (hash > 31) 3652 hash_high |= 1 << (hash - 32); 3653 else 3654 hash_low |= 1 << hash; 3655 } 3656 3657 writel(hash_high, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); 3658 writel(hash_low, fep->hwp + FEC_GRP_HASH_TABLE_LOW); 3659 } 3660 3661 /* Set a MAC change in hardware. */ 3662 static int 3663 fec_set_mac_address(struct net_device *ndev, void *p) 3664 { 3665 struct fec_enet_private *fep = netdev_priv(ndev); 3666 struct sockaddr *addr = p; 3667 3668 if (addr) { 3669 if (!is_valid_ether_addr(addr->sa_data)) 3670 return -EADDRNOTAVAIL; 3671 eth_hw_addr_set(ndev, addr->sa_data); 3672 } 3673 3674 /* Add netif status check here to avoid system hang in below case: 3675 * ifconfig ethx down; ifconfig ethx hw ether xx:xx:xx:xx:xx:xx; 3676 * After ethx down, fec all clocks are gated off and then register 3677 * access causes system hang. 3678 */ 3679 if (!netif_running(ndev)) 3680 return 0; 3681 3682 writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) | 3683 (ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24), 3684 fep->hwp + FEC_ADDR_LOW); 3685 writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24), 3686 fep->hwp + FEC_ADDR_HIGH); 3687 return 0; 3688 } 3689 3690 static inline void fec_enet_set_netdev_features(struct net_device *netdev, 3691 netdev_features_t features) 3692 { 3693 struct fec_enet_private *fep = netdev_priv(netdev); 3694 netdev_features_t changed = features ^ netdev->features; 3695 3696 netdev->features = features; 3697 3698 /* Receive checksum has been changed */ 3699 if (changed & NETIF_F_RXCSUM) { 3700 if (features & NETIF_F_RXCSUM) 3701 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 3702 else 3703 fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED; 3704 } 3705 } 3706 3707 static int fec_set_features(struct net_device *netdev, 3708 netdev_features_t features) 3709 { 3710 struct fec_enet_private *fep = netdev_priv(netdev); 3711 netdev_features_t changed = features ^ netdev->features; 3712 3713 if (netif_running(netdev) && changed & NETIF_F_RXCSUM) { 3714 napi_disable(&fep->napi); 3715 netif_tx_lock_bh(netdev); 3716 fec_stop(netdev); 3717 fec_enet_set_netdev_features(netdev, features); 3718 fec_restart(netdev); 3719 netif_tx_wake_all_queues(netdev); 3720 netif_tx_unlock_bh(netdev); 3721 napi_enable(&fep->napi); 3722 } else { 3723 fec_enet_set_netdev_features(netdev, features); 3724 } 3725 3726 return 0; 3727 } 3728 3729 static u16 fec_enet_select_queue(struct net_device *ndev, struct sk_buff *skb, 3730 struct net_device *sb_dev) 3731 { 3732 struct fec_enet_private *fep = netdev_priv(ndev); 3733 u16 vlan_tag = 0; 3734 3735 if (!(fep->quirks & FEC_QUIRK_HAS_AVB)) 3736 return netdev_pick_tx(ndev, skb, NULL); 3737 3738 /* VLAN is present in the payload.*/ 3739 if (eth_type_vlan(skb->protocol)) { 3740 struct vlan_ethhdr *vhdr = skb_vlan_eth_hdr(skb); 3741 3742 vlan_tag = ntohs(vhdr->h_vlan_TCI); 3743 /* VLAN is present in the skb but not yet pushed in the payload.*/ 3744 } else if (skb_vlan_tag_present(skb)) { 3745 vlan_tag = skb->vlan_tci; 3746 } else { 3747 return vlan_tag; 3748 } 3749 3750 return fec_enet_vlan_pri_to_queue[vlan_tag >> 13]; 3751 } 3752 3753 static int fec_enet_bpf(struct net_device *dev, struct netdev_bpf *bpf) 3754 { 3755 struct fec_enet_private *fep = netdev_priv(dev); 3756 bool is_run = netif_running(dev); 3757 struct bpf_prog *old_prog; 3758 3759 switch (bpf->command) { 3760 case XDP_SETUP_PROG: 3761 /* No need to support the SoCs that require to 3762 * do the frame swap because the performance wouldn't be 3763 * better than the skb mode. 3764 */ 3765 if (fep->quirks & FEC_QUIRK_SWAP_FRAME) 3766 return -EOPNOTSUPP; 3767 3768 if (!bpf->prog) 3769 xdp_features_clear_redirect_target(dev); 3770 3771 if (is_run) { 3772 napi_disable(&fep->napi); 3773 netif_tx_disable(dev); 3774 } 3775 3776 old_prog = xchg(&fep->xdp_prog, bpf->prog); 3777 if (old_prog) 3778 bpf_prog_put(old_prog); 3779 3780 fec_restart(dev); 3781 3782 if (is_run) { 3783 napi_enable(&fep->napi); 3784 netif_tx_start_all_queues(dev); 3785 } 3786 3787 if (bpf->prog) 3788 xdp_features_set_redirect_target(dev, false); 3789 3790 return 0; 3791 3792 case XDP_SETUP_XSK_POOL: 3793 return -EOPNOTSUPP; 3794 3795 default: 3796 return -EOPNOTSUPP; 3797 } 3798 } 3799 3800 static int 3801 fec_enet_xdp_get_tx_queue(struct fec_enet_private *fep, int index) 3802 { 3803 if (unlikely(index < 0)) 3804 return 0; 3805 3806 return (index % fep->num_tx_queues); 3807 } 3808 3809 static int fec_enet_txq_xmit_frame(struct fec_enet_private *fep, 3810 struct fec_enet_priv_tx_q *txq, 3811 void *frame, u32 dma_sync_len, 3812 bool ndo_xmit) 3813 { 3814 unsigned int index, status, estatus; 3815 struct bufdesc *bdp; 3816 dma_addr_t dma_addr; 3817 int entries_free; 3818 u16 frame_len; 3819 3820 entries_free = fec_enet_get_free_txdesc_num(txq); 3821 if (entries_free < MAX_SKB_FRAGS + 1) { 3822 netdev_err_once(fep->netdev, "NOT enough BD for SG!\n"); 3823 return -EBUSY; 3824 } 3825 3826 /* Fill in a Tx ring entry */ 3827 bdp = txq->bd.cur; 3828 status = fec16_to_cpu(bdp->cbd_sc); 3829 status &= ~BD_ENET_TX_STATS; 3830 3831 index = fec_enet_get_bd_index(bdp, &txq->bd); 3832 3833 if (ndo_xmit) { 3834 struct xdp_frame *xdpf = frame; 3835 3836 dma_addr = dma_map_single(&fep->pdev->dev, xdpf->data, 3837 xdpf->len, DMA_TO_DEVICE); 3838 if (dma_mapping_error(&fep->pdev->dev, dma_addr)) 3839 return -ENOMEM; 3840 3841 frame_len = xdpf->len; 3842 txq->tx_buf[index].buf_p = xdpf; 3843 txq->tx_buf[index].type = FEC_TXBUF_T_XDP_NDO; 3844 } else { 3845 struct xdp_buff *xdpb = frame; 3846 struct page *page; 3847 3848 page = virt_to_page(xdpb->data); 3849 dma_addr = page_pool_get_dma_addr(page) + 3850 (xdpb->data - xdpb->data_hard_start); 3851 dma_sync_single_for_device(&fep->pdev->dev, dma_addr, 3852 dma_sync_len, DMA_BIDIRECTIONAL); 3853 frame_len = xdpb->data_end - xdpb->data; 3854 txq->tx_buf[index].buf_p = page; 3855 txq->tx_buf[index].type = FEC_TXBUF_T_XDP_TX; 3856 } 3857 3858 status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST); 3859 if (fep->bufdesc_ex) 3860 estatus = BD_ENET_TX_INT; 3861 3862 bdp->cbd_bufaddr = cpu_to_fec32(dma_addr); 3863 bdp->cbd_datlen = cpu_to_fec16(frame_len); 3864 3865 if (fep->bufdesc_ex) { 3866 struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp; 3867 3868 if (fep->quirks & FEC_QUIRK_HAS_AVB) 3869 estatus |= FEC_TX_BD_FTYPE(txq->bd.qid); 3870 3871 ebdp->cbd_bdu = 0; 3872 ebdp->cbd_esc = cpu_to_fec32(estatus); 3873 } 3874 3875 /* Make sure the updates to rest of the descriptor are performed before 3876 * transferring ownership. 3877 */ 3878 dma_wmb(); 3879 3880 /* Send it on its way. Tell FEC it's ready, interrupt when done, 3881 * it's the last BD of the frame, and to put the CRC on the end. 3882 */ 3883 status |= (BD_ENET_TX_READY | BD_ENET_TX_TC); 3884 bdp->cbd_sc = cpu_to_fec16(status); 3885 3886 /* If this was the last BD in the ring, start at the beginning again. */ 3887 bdp = fec_enet_get_nextdesc(bdp, &txq->bd); 3888 3889 /* Make sure the update to bdp are performed before txq->bd.cur. */ 3890 dma_wmb(); 3891 3892 txq->bd.cur = bdp; 3893 3894 /* Trigger transmission start */ 3895 writel(0, txq->bd.reg_desc_active); 3896 3897 return 0; 3898 } 3899 3900 static int fec_enet_xdp_tx_xmit(struct fec_enet_private *fep, 3901 int cpu, struct xdp_buff *xdp, 3902 u32 dma_sync_len) 3903 { 3904 struct fec_enet_priv_tx_q *txq; 3905 struct netdev_queue *nq; 3906 int queue, ret; 3907 3908 queue = fec_enet_xdp_get_tx_queue(fep, cpu); 3909 txq = fep->tx_queue[queue]; 3910 nq = netdev_get_tx_queue(fep->netdev, queue); 3911 3912 __netif_tx_lock(nq, cpu); 3913 3914 /* Avoid tx timeout as XDP shares the queue with kernel stack */ 3915 txq_trans_cond_update(nq); 3916 ret = fec_enet_txq_xmit_frame(fep, txq, xdp, dma_sync_len, false); 3917 3918 __netif_tx_unlock(nq); 3919 3920 return ret; 3921 } 3922 3923 static int fec_enet_xdp_xmit(struct net_device *dev, 3924 int num_frames, 3925 struct xdp_frame **frames, 3926 u32 flags) 3927 { 3928 struct fec_enet_private *fep = netdev_priv(dev); 3929 struct fec_enet_priv_tx_q *txq; 3930 int cpu = smp_processor_id(); 3931 unsigned int sent_frames = 0; 3932 struct netdev_queue *nq; 3933 unsigned int queue; 3934 int i; 3935 3936 queue = fec_enet_xdp_get_tx_queue(fep, cpu); 3937 txq = fep->tx_queue[queue]; 3938 nq = netdev_get_tx_queue(fep->netdev, queue); 3939 3940 __netif_tx_lock(nq, cpu); 3941 3942 /* Avoid tx timeout as XDP shares the queue with kernel stack */ 3943 txq_trans_cond_update(nq); 3944 for (i = 0; i < num_frames; i++) { 3945 if (fec_enet_txq_xmit_frame(fep, txq, frames[i], 0, true) < 0) 3946 break; 3947 sent_frames++; 3948 } 3949 3950 __netif_tx_unlock(nq); 3951 3952 return sent_frames; 3953 } 3954 3955 static int fec_hwtstamp_get(struct net_device *ndev, 3956 struct kernel_hwtstamp_config *config) 3957 { 3958 struct fec_enet_private *fep = netdev_priv(ndev); 3959 3960 if (!netif_running(ndev)) 3961 return -EINVAL; 3962 3963 if (!fep->bufdesc_ex) 3964 return -EOPNOTSUPP; 3965 3966 fec_ptp_get(ndev, config); 3967 3968 return 0; 3969 } 3970 3971 static int fec_hwtstamp_set(struct net_device *ndev, 3972 struct kernel_hwtstamp_config *config, 3973 struct netlink_ext_ack *extack) 3974 { 3975 struct fec_enet_private *fep = netdev_priv(ndev); 3976 3977 if (!netif_running(ndev)) 3978 return -EINVAL; 3979 3980 if (!fep->bufdesc_ex) 3981 return -EOPNOTSUPP; 3982 3983 return fec_ptp_set(ndev, config, extack); 3984 } 3985 3986 static const struct net_device_ops fec_netdev_ops = { 3987 .ndo_open = fec_enet_open, 3988 .ndo_stop = fec_enet_close, 3989 .ndo_start_xmit = fec_enet_start_xmit, 3990 .ndo_select_queue = fec_enet_select_queue, 3991 .ndo_set_rx_mode = set_multicast_list, 3992 .ndo_validate_addr = eth_validate_addr, 3993 .ndo_tx_timeout = fec_timeout, 3994 .ndo_set_mac_address = fec_set_mac_address, 3995 .ndo_eth_ioctl = phy_do_ioctl_running, 3996 .ndo_set_features = fec_set_features, 3997 .ndo_bpf = fec_enet_bpf, 3998 .ndo_xdp_xmit = fec_enet_xdp_xmit, 3999 .ndo_hwtstamp_get = fec_hwtstamp_get, 4000 .ndo_hwtstamp_set = fec_hwtstamp_set, 4001 }; 4002 4003 static const unsigned short offset_des_active_rxq[] = { 4004 FEC_R_DES_ACTIVE_0, FEC_R_DES_ACTIVE_1, FEC_R_DES_ACTIVE_2 4005 }; 4006 4007 static const unsigned short offset_des_active_txq[] = { 4008 FEC_X_DES_ACTIVE_0, FEC_X_DES_ACTIVE_1, FEC_X_DES_ACTIVE_2 4009 }; 4010 4011 /* 4012 * XXX: We need to clean up on failure exits here. 4013 * 4014 */ 4015 static int fec_enet_init(struct net_device *ndev) 4016 { 4017 struct fec_enet_private *fep = netdev_priv(ndev); 4018 struct bufdesc *cbd_base; 4019 dma_addr_t bd_dma; 4020 int bd_size; 4021 unsigned int i; 4022 unsigned dsize = fep->bufdesc_ex ? sizeof(struct bufdesc_ex) : 4023 sizeof(struct bufdesc); 4024 unsigned dsize_log2 = __fls(dsize); 4025 int ret; 4026 4027 WARN_ON(dsize != (1 << dsize_log2)); 4028 #if defined(CONFIG_ARM) || defined(CONFIG_ARM64) 4029 fep->rx_align = 0xf; 4030 fep->tx_align = 0xf; 4031 #else 4032 fep->rx_align = 0x3; 4033 fep->tx_align = 0x3; 4034 #endif 4035 fep->rx_pkts_itr = FEC_ITR_ICFT_DEFAULT; 4036 fep->tx_pkts_itr = FEC_ITR_ICFT_DEFAULT; 4037 fep->rx_time_itr = FEC_ITR_ICTT_DEFAULT; 4038 fep->tx_time_itr = FEC_ITR_ICTT_DEFAULT; 4039 4040 /* Check mask of the streaming and coherent API */ 4041 ret = dma_set_mask_and_coherent(&fep->pdev->dev, DMA_BIT_MASK(32)); 4042 if (ret < 0) { 4043 dev_warn(&fep->pdev->dev, "No suitable DMA available\n"); 4044 return ret; 4045 } 4046 4047 ret = fec_enet_alloc_queue(ndev); 4048 if (ret) 4049 return ret; 4050 4051 bd_size = (fep->total_tx_ring_size + fep->total_rx_ring_size) * dsize; 4052 4053 /* Allocate memory for buffer descriptors. */ 4054 cbd_base = fec_dmam_alloc(&fep->pdev->dev, bd_size, &bd_dma, 4055 GFP_KERNEL); 4056 if (!cbd_base) { 4057 ret = -ENOMEM; 4058 goto free_queue_mem; 4059 } 4060 4061 /* Get the Ethernet address */ 4062 ret = fec_get_mac(ndev); 4063 if (ret) 4064 goto free_queue_mem; 4065 4066 /* Set receive and transmit descriptor base. */ 4067 for (i = 0; i < fep->num_rx_queues; i++) { 4068 struct fec_enet_priv_rx_q *rxq = fep->rx_queue[i]; 4069 unsigned size = dsize * rxq->bd.ring_size; 4070 4071 rxq->bd.qid = i; 4072 rxq->bd.base = cbd_base; 4073 rxq->bd.cur = cbd_base; 4074 rxq->bd.dma = bd_dma; 4075 rxq->bd.dsize = dsize; 4076 rxq->bd.dsize_log2 = dsize_log2; 4077 rxq->bd.reg_desc_active = fep->hwp + offset_des_active_rxq[i]; 4078 bd_dma += size; 4079 cbd_base = (struct bufdesc *)(((void *)cbd_base) + size); 4080 rxq->bd.last = (struct bufdesc *)(((void *)cbd_base) - dsize); 4081 } 4082 4083 for (i = 0; i < fep->num_tx_queues; i++) { 4084 struct fec_enet_priv_tx_q *txq = fep->tx_queue[i]; 4085 unsigned size = dsize * txq->bd.ring_size; 4086 4087 txq->bd.qid = i; 4088 txq->bd.base = cbd_base; 4089 txq->bd.cur = cbd_base; 4090 txq->bd.dma = bd_dma; 4091 txq->bd.dsize = dsize; 4092 txq->bd.dsize_log2 = dsize_log2; 4093 txq->bd.reg_desc_active = fep->hwp + offset_des_active_txq[i]; 4094 bd_dma += size; 4095 cbd_base = (struct bufdesc *)(((void *)cbd_base) + size); 4096 txq->bd.last = (struct bufdesc *)(((void *)cbd_base) - dsize); 4097 } 4098 4099 4100 /* The FEC Ethernet specific entries in the device structure */ 4101 ndev->watchdog_timeo = TX_TIMEOUT; 4102 ndev->netdev_ops = &fec_netdev_ops; 4103 ndev->ethtool_ops = &fec_enet_ethtool_ops; 4104 4105 writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK); 4106 netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi); 4107 4108 if (fep->quirks & FEC_QUIRK_HAS_VLAN) 4109 /* enable hw VLAN support */ 4110 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; 4111 4112 if (fep->quirks & FEC_QUIRK_HAS_CSUM) { 4113 netif_set_tso_max_segs(ndev, FEC_MAX_TSO_SEGS); 4114 4115 /* enable hw accelerator */ 4116 ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM 4117 | NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO); 4118 fep->csum_flags |= FLAG_RX_CSUM_ENABLED; 4119 } 4120 4121 if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES) { 4122 fep->tx_align = 0; 4123 fep->rx_align = 0x3f; 4124 } 4125 4126 ndev->hw_features = ndev->features; 4127 4128 if (!(fep->quirks & FEC_QUIRK_SWAP_FRAME)) 4129 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | 4130 NETDEV_XDP_ACT_REDIRECT; 4131 4132 fec_restart(ndev); 4133 4134 if (fep->quirks & FEC_QUIRK_MIB_CLEAR) 4135 fec_enet_clear_ethtool_stats(ndev); 4136 else 4137 fec_enet_update_ethtool_stats(ndev); 4138 4139 return 0; 4140 4141 free_queue_mem: 4142 fec_enet_free_queue(ndev); 4143 return ret; 4144 } 4145 4146 static void fec_enet_deinit(struct net_device *ndev) 4147 { 4148 struct fec_enet_private *fep = netdev_priv(ndev); 4149 4150 netif_napi_del(&fep->napi); 4151 fec_enet_free_queue(ndev); 4152 } 4153 4154 #ifdef CONFIG_OF 4155 static int fec_reset_phy(struct platform_device *pdev) 4156 { 4157 struct gpio_desc *phy_reset; 4158 int msec = 1, phy_post_delay = 0; 4159 struct device_node *np = pdev->dev.of_node; 4160 int err; 4161 4162 if (!np) 4163 return 0; 4164 4165 err = of_property_read_u32(np, "phy-reset-duration", &msec); 4166 /* A sane reset duration should not be longer than 1s */ 4167 if (!err && msec > 1000) 4168 msec = 1; 4169 4170 err = of_property_read_u32(np, "phy-reset-post-delay", &phy_post_delay); 4171 /* valid reset duration should be less than 1s */ 4172 if (!err && phy_post_delay > 1000) 4173 return -EINVAL; 4174 4175 phy_reset = devm_gpiod_get_optional(&pdev->dev, "phy-reset", 4176 GPIOD_OUT_HIGH); 4177 if (IS_ERR(phy_reset)) 4178 return dev_err_probe(&pdev->dev, PTR_ERR(phy_reset), 4179 "failed to get phy-reset-gpios\n"); 4180 4181 if (!phy_reset) 4182 return 0; 4183 4184 if (msec > 20) 4185 msleep(msec); 4186 else 4187 usleep_range(msec * 1000, msec * 1000 + 1000); 4188 4189 gpiod_set_value_cansleep(phy_reset, 0); 4190 4191 if (!phy_post_delay) 4192 return 0; 4193 4194 if (phy_post_delay > 20) 4195 msleep(phy_post_delay); 4196 else 4197 usleep_range(phy_post_delay * 1000, 4198 phy_post_delay * 1000 + 1000); 4199 4200 return 0; 4201 } 4202 #else /* CONFIG_OF */ 4203 static int fec_reset_phy(struct platform_device *pdev) 4204 { 4205 /* 4206 * In case of platform probe, the reset has been done 4207 * by machine code. 4208 */ 4209 return 0; 4210 } 4211 #endif /* CONFIG_OF */ 4212 4213 static void 4214 fec_enet_get_queue_num(struct platform_device *pdev, int *num_tx, int *num_rx) 4215 { 4216 struct device_node *np = pdev->dev.of_node; 4217 4218 *num_tx = *num_rx = 1; 4219 4220 if (!np || !of_device_is_available(np)) 4221 return; 4222 4223 /* parse the num of tx and rx queues */ 4224 of_property_read_u32(np, "fsl,num-tx-queues", num_tx); 4225 4226 of_property_read_u32(np, "fsl,num-rx-queues", num_rx); 4227 4228 if (*num_tx < 1 || *num_tx > FEC_ENET_MAX_TX_QS) { 4229 dev_warn(&pdev->dev, "Invalid num_tx(=%d), fall back to 1\n", 4230 *num_tx); 4231 *num_tx = 1; 4232 return; 4233 } 4234 4235 if (*num_rx < 1 || *num_rx > FEC_ENET_MAX_RX_QS) { 4236 dev_warn(&pdev->dev, "Invalid num_rx(=%d), fall back to 1\n", 4237 *num_rx); 4238 *num_rx = 1; 4239 return; 4240 } 4241 4242 } 4243 4244 static int fec_enet_get_irq_cnt(struct platform_device *pdev) 4245 { 4246 int irq_cnt = platform_irq_count(pdev); 4247 4248 if (irq_cnt > FEC_IRQ_NUM) 4249 irq_cnt = FEC_IRQ_NUM; /* last for pps */ 4250 else if (irq_cnt == 2) 4251 irq_cnt = 1; /* last for pps */ 4252 else if (irq_cnt <= 0) 4253 irq_cnt = 1; /* At least 1 irq is needed */ 4254 return irq_cnt; 4255 } 4256 4257 static void fec_enet_get_wakeup_irq(struct platform_device *pdev) 4258 { 4259 struct net_device *ndev = platform_get_drvdata(pdev); 4260 struct fec_enet_private *fep = netdev_priv(ndev); 4261 4262 if (fep->quirks & FEC_QUIRK_WAKEUP_FROM_INT2) 4263 fep->wake_irq = fep->irq[2]; 4264 else 4265 fep->wake_irq = fep->irq[0]; 4266 } 4267 4268 static int fec_enet_init_stop_mode(struct fec_enet_private *fep, 4269 struct device_node *np) 4270 { 4271 struct device_node *gpr_np; 4272 u32 out_val[3]; 4273 int ret = 0; 4274 4275 gpr_np = of_parse_phandle(np, "fsl,stop-mode", 0); 4276 if (!gpr_np) 4277 return 0; 4278 4279 ret = of_property_read_u32_array(np, "fsl,stop-mode", out_val, 4280 ARRAY_SIZE(out_val)); 4281 if (ret) { 4282 dev_dbg(&fep->pdev->dev, "no stop mode property\n"); 4283 goto out; 4284 } 4285 4286 fep->stop_gpr.gpr = syscon_node_to_regmap(gpr_np); 4287 if (IS_ERR(fep->stop_gpr.gpr)) { 4288 dev_err(&fep->pdev->dev, "could not find gpr regmap\n"); 4289 ret = PTR_ERR(fep->stop_gpr.gpr); 4290 fep->stop_gpr.gpr = NULL; 4291 goto out; 4292 } 4293 4294 fep->stop_gpr.reg = out_val[1]; 4295 fep->stop_gpr.bit = out_val[2]; 4296 4297 out: 4298 of_node_put(gpr_np); 4299 4300 return ret; 4301 } 4302 4303 static int 4304 fec_probe(struct platform_device *pdev) 4305 { 4306 struct fec_enet_private *fep; 4307 struct fec_platform_data *pdata; 4308 phy_interface_t interface; 4309 struct net_device *ndev; 4310 int i, irq, ret = 0; 4311 static int dev_id; 4312 struct device_node *np = pdev->dev.of_node, *phy_node; 4313 int num_tx_qs; 4314 int num_rx_qs; 4315 char irq_name[8]; 4316 int irq_cnt; 4317 const struct fec_devinfo *dev_info; 4318 4319 fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs); 4320 4321 /* Init network device */ 4322 ndev = alloc_etherdev_mqs(sizeof(struct fec_enet_private) + 4323 FEC_STATS_SIZE, num_tx_qs, num_rx_qs); 4324 if (!ndev) 4325 return -ENOMEM; 4326 4327 SET_NETDEV_DEV(ndev, &pdev->dev); 4328 4329 /* setup board info structure */ 4330 fep = netdev_priv(ndev); 4331 4332 dev_info = device_get_match_data(&pdev->dev); 4333 if (!dev_info) 4334 dev_info = (const struct fec_devinfo *)pdev->id_entry->driver_data; 4335 if (dev_info) 4336 fep->quirks = dev_info->quirks; 4337 4338 fep->netdev = ndev; 4339 fep->num_rx_queues = num_rx_qs; 4340 fep->num_tx_queues = num_tx_qs; 4341 4342 #if !defined(CONFIG_M5272) 4343 /* default enable pause frame auto negotiation */ 4344 if (fep->quirks & FEC_QUIRK_HAS_GBIT) 4345 fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG; 4346 #endif 4347 4348 /* Select default pin state */ 4349 pinctrl_pm_select_default_state(&pdev->dev); 4350 4351 fep->hwp = devm_platform_ioremap_resource(pdev, 0); 4352 if (IS_ERR(fep->hwp)) { 4353 ret = PTR_ERR(fep->hwp); 4354 goto failed_ioremap; 4355 } 4356 4357 fep->pdev = pdev; 4358 fep->dev_id = dev_id++; 4359 4360 platform_set_drvdata(pdev, ndev); 4361 4362 if ((of_machine_is_compatible("fsl,imx6q") || 4363 of_machine_is_compatible("fsl,imx6dl")) && 4364 !of_property_read_bool(np, "fsl,err006687-workaround-present")) 4365 fep->quirks |= FEC_QUIRK_ERR006687; 4366 4367 ret = fec_enet_ipc_handle_init(fep); 4368 if (ret) 4369 goto failed_ipc_init; 4370 4371 if (of_property_read_bool(np, "fsl,magic-packet")) 4372 fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET; 4373 4374 ret = fec_enet_init_stop_mode(fep, np); 4375 if (ret) 4376 goto failed_stop_mode; 4377 4378 phy_node = of_parse_phandle(np, "phy-handle", 0); 4379 if (!phy_node && of_phy_is_fixed_link(np)) { 4380 ret = of_phy_register_fixed_link(np); 4381 if (ret < 0) { 4382 dev_err(&pdev->dev, 4383 "broken fixed-link specification\n"); 4384 goto failed_phy; 4385 } 4386 phy_node = of_node_get(np); 4387 } 4388 fep->phy_node = phy_node; 4389 4390 ret = of_get_phy_mode(pdev->dev.of_node, &interface); 4391 if (ret) { 4392 pdata = dev_get_platdata(&pdev->dev); 4393 if (pdata) 4394 fep->phy_interface = pdata->phy; 4395 else 4396 fep->phy_interface = PHY_INTERFACE_MODE_MII; 4397 } else { 4398 fep->phy_interface = interface; 4399 } 4400 4401 ret = fec_enet_parse_rgmii_delay(fep, np); 4402 if (ret) 4403 goto failed_rgmii_delay; 4404 4405 fep->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); 4406 if (IS_ERR(fep->clk_ipg)) { 4407 ret = PTR_ERR(fep->clk_ipg); 4408 goto failed_clk; 4409 } 4410 4411 fep->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); 4412 if (IS_ERR(fep->clk_ahb)) { 4413 ret = PTR_ERR(fep->clk_ahb); 4414 goto failed_clk; 4415 } 4416 4417 fep->itr_clk_rate = clk_get_rate(fep->clk_ahb); 4418 4419 /* enet_out is optional, depends on board */ 4420 fep->clk_enet_out = devm_clk_get_optional(&pdev->dev, "enet_out"); 4421 if (IS_ERR(fep->clk_enet_out)) { 4422 ret = PTR_ERR(fep->clk_enet_out); 4423 goto failed_clk; 4424 } 4425 4426 fep->ptp_clk_on = false; 4427 mutex_init(&fep->ptp_clk_mutex); 4428 4429 /* clk_ref is optional, depends on board */ 4430 fep->clk_ref = devm_clk_get_optional(&pdev->dev, "enet_clk_ref"); 4431 if (IS_ERR(fep->clk_ref)) { 4432 ret = PTR_ERR(fep->clk_ref); 4433 goto failed_clk; 4434 } 4435 fep->clk_ref_rate = clk_get_rate(fep->clk_ref); 4436 4437 /* clk_2x_txclk is optional, depends on board */ 4438 if (fep->rgmii_txc_dly || fep->rgmii_rxc_dly) { 4439 fep->clk_2x_txclk = devm_clk_get(&pdev->dev, "enet_2x_txclk"); 4440 if (IS_ERR(fep->clk_2x_txclk)) 4441 fep->clk_2x_txclk = NULL; 4442 } 4443 4444 fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX; 4445 fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp"); 4446 if (IS_ERR(fep->clk_ptp)) { 4447 fep->clk_ptp = NULL; 4448 fep->bufdesc_ex = false; 4449 } 4450 4451 ret = fec_enet_clk_enable(ndev, true); 4452 if (ret) 4453 goto failed_clk; 4454 4455 ret = clk_prepare_enable(fep->clk_ipg); 4456 if (ret) 4457 goto failed_clk_ipg; 4458 ret = clk_prepare_enable(fep->clk_ahb); 4459 if (ret) 4460 goto failed_clk_ahb; 4461 4462 fep->reg_phy = devm_regulator_get_optional(&pdev->dev, "phy"); 4463 if (!IS_ERR(fep->reg_phy)) { 4464 ret = regulator_enable(fep->reg_phy); 4465 if (ret) { 4466 dev_err(&pdev->dev, 4467 "Failed to enable phy regulator: %d\n", ret); 4468 goto failed_regulator; 4469 } 4470 } else { 4471 if (PTR_ERR(fep->reg_phy) == -EPROBE_DEFER) { 4472 ret = -EPROBE_DEFER; 4473 goto failed_regulator; 4474 } 4475 fep->reg_phy = NULL; 4476 } 4477 4478 pm_runtime_set_autosuspend_delay(&pdev->dev, FEC_MDIO_PM_TIMEOUT); 4479 pm_runtime_use_autosuspend(&pdev->dev); 4480 pm_runtime_get_noresume(&pdev->dev); 4481 pm_runtime_set_active(&pdev->dev); 4482 pm_runtime_enable(&pdev->dev); 4483 4484 ret = fec_reset_phy(pdev); 4485 if (ret) 4486 goto failed_reset; 4487 4488 irq_cnt = fec_enet_get_irq_cnt(pdev); 4489 if (fep->bufdesc_ex) 4490 fec_ptp_init(pdev, irq_cnt); 4491 4492 ret = fec_enet_init(ndev); 4493 if (ret) 4494 goto failed_init; 4495 4496 for (i = 0; i < irq_cnt; i++) { 4497 snprintf(irq_name, sizeof(irq_name), "int%d", i); 4498 irq = platform_get_irq_byname_optional(pdev, irq_name); 4499 if (irq < 0) 4500 irq = platform_get_irq(pdev, i); 4501 if (irq < 0) { 4502 ret = irq; 4503 goto failed_irq; 4504 } 4505 ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt, 4506 0, pdev->name, ndev); 4507 if (ret) 4508 goto failed_irq; 4509 4510 fep->irq[i] = irq; 4511 } 4512 4513 /* Decide which interrupt line is wakeup capable */ 4514 fec_enet_get_wakeup_irq(pdev); 4515 4516 ret = fec_enet_mii_init(pdev); 4517 if (ret) 4518 goto failed_mii_init; 4519 4520 /* Carrier starts down, phylib will bring it up */ 4521 netif_carrier_off(ndev); 4522 fec_enet_clk_enable(ndev, false); 4523 pinctrl_pm_select_sleep_state(&pdev->dev); 4524 4525 ndev->max_mtu = PKT_MAXBUF_SIZE - ETH_HLEN - ETH_FCS_LEN; 4526 4527 ret = register_netdev(ndev); 4528 if (ret) 4529 goto failed_register; 4530 4531 device_init_wakeup(&ndev->dev, fep->wol_flag & 4532 FEC_WOL_HAS_MAGIC_PACKET); 4533 4534 if (fep->bufdesc_ex && fep->ptp_clock) 4535 netdev_info(ndev, "registered PHC device %d\n", fep->dev_id); 4536 4537 INIT_WORK(&fep->tx_timeout_work, fec_enet_timeout_work); 4538 4539 pm_runtime_mark_last_busy(&pdev->dev); 4540 pm_runtime_put_autosuspend(&pdev->dev); 4541 4542 return 0; 4543 4544 failed_register: 4545 fec_enet_mii_remove(fep); 4546 failed_mii_init: 4547 failed_irq: 4548 fec_enet_deinit(ndev); 4549 failed_init: 4550 fec_ptp_stop(pdev); 4551 failed_reset: 4552 pm_runtime_put_noidle(&pdev->dev); 4553 pm_runtime_disable(&pdev->dev); 4554 if (fep->reg_phy) 4555 regulator_disable(fep->reg_phy); 4556 failed_regulator: 4557 clk_disable_unprepare(fep->clk_ahb); 4558 failed_clk_ahb: 4559 clk_disable_unprepare(fep->clk_ipg); 4560 failed_clk_ipg: 4561 fec_enet_clk_enable(ndev, false); 4562 failed_clk: 4563 failed_rgmii_delay: 4564 if (of_phy_is_fixed_link(np)) 4565 of_phy_deregister_fixed_link(np); 4566 of_node_put(phy_node); 4567 failed_stop_mode: 4568 failed_ipc_init: 4569 failed_phy: 4570 dev_id--; 4571 failed_ioremap: 4572 free_netdev(ndev); 4573 4574 return ret; 4575 } 4576 4577 static void 4578 fec_drv_remove(struct platform_device *pdev) 4579 { 4580 struct net_device *ndev = platform_get_drvdata(pdev); 4581 struct fec_enet_private *fep = netdev_priv(ndev); 4582 struct device_node *np = pdev->dev.of_node; 4583 int ret; 4584 4585 ret = pm_runtime_get_sync(&pdev->dev); 4586 if (ret < 0) 4587 dev_err(&pdev->dev, 4588 "Failed to resume device in remove callback (%pe)\n", 4589 ERR_PTR(ret)); 4590 4591 cancel_work_sync(&fep->tx_timeout_work); 4592 fec_ptp_stop(pdev); 4593 unregister_netdev(ndev); 4594 fec_enet_mii_remove(fep); 4595 if (fep->reg_phy) 4596 regulator_disable(fep->reg_phy); 4597 4598 if (of_phy_is_fixed_link(np)) 4599 of_phy_deregister_fixed_link(np); 4600 of_node_put(fep->phy_node); 4601 4602 /* After pm_runtime_get_sync() failed, the clks are still off, so skip 4603 * disabling them again. 4604 */ 4605 if (ret >= 0) { 4606 clk_disable_unprepare(fep->clk_ahb); 4607 clk_disable_unprepare(fep->clk_ipg); 4608 } 4609 pm_runtime_put_noidle(&pdev->dev); 4610 pm_runtime_disable(&pdev->dev); 4611 4612 fec_enet_deinit(ndev); 4613 free_netdev(ndev); 4614 } 4615 4616 static int fec_suspend(struct device *dev) 4617 { 4618 struct net_device *ndev = dev_get_drvdata(dev); 4619 struct fec_enet_private *fep = netdev_priv(ndev); 4620 int ret; 4621 4622 rtnl_lock(); 4623 if (netif_running(ndev)) { 4624 if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) 4625 fep->wol_flag |= FEC_WOL_FLAG_SLEEP_ON; 4626 phy_stop(ndev->phydev); 4627 napi_disable(&fep->napi); 4628 netif_tx_lock_bh(ndev); 4629 netif_device_detach(ndev); 4630 netif_tx_unlock_bh(ndev); 4631 fec_stop(ndev); 4632 if (!(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) { 4633 fec_irqs_disable(ndev); 4634 pinctrl_pm_select_sleep_state(&fep->pdev->dev); 4635 } else { 4636 fec_irqs_disable_except_wakeup(ndev); 4637 if (fep->wake_irq > 0) { 4638 disable_irq(fep->wake_irq); 4639 enable_irq_wake(fep->wake_irq); 4640 } 4641 fec_enet_stop_mode(fep, true); 4642 } 4643 /* It's safe to disable clocks since interrupts are masked */ 4644 fec_enet_clk_enable(ndev, false); 4645 4646 fep->rpm_active = !pm_runtime_status_suspended(dev); 4647 if (fep->rpm_active) { 4648 ret = pm_runtime_force_suspend(dev); 4649 if (ret < 0) { 4650 rtnl_unlock(); 4651 return ret; 4652 } 4653 } 4654 } 4655 rtnl_unlock(); 4656 4657 if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) 4658 regulator_disable(fep->reg_phy); 4659 4660 /* SOC supply clock to phy, when clock is disabled, phy link down 4661 * SOC control phy regulator, when regulator is disabled, phy link down 4662 */ 4663 if (fep->clk_enet_out || fep->reg_phy) 4664 fep->link = 0; 4665 4666 return 0; 4667 } 4668 4669 static int fec_resume(struct device *dev) 4670 { 4671 struct net_device *ndev = dev_get_drvdata(dev); 4672 struct fec_enet_private *fep = netdev_priv(ndev); 4673 int ret; 4674 int val; 4675 4676 if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) { 4677 ret = regulator_enable(fep->reg_phy); 4678 if (ret) 4679 return ret; 4680 } 4681 4682 rtnl_lock(); 4683 if (netif_running(ndev)) { 4684 if (fep->rpm_active) 4685 pm_runtime_force_resume(dev); 4686 4687 ret = fec_enet_clk_enable(ndev, true); 4688 if (ret) { 4689 rtnl_unlock(); 4690 goto failed_clk; 4691 } 4692 if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) { 4693 fec_enet_stop_mode(fep, false); 4694 if (fep->wake_irq) { 4695 disable_irq_wake(fep->wake_irq); 4696 enable_irq(fep->wake_irq); 4697 } 4698 4699 val = readl(fep->hwp + FEC_ECNTRL); 4700 val &= ~(FEC_ECR_MAGICEN | FEC_ECR_SLEEP); 4701 writel(val, fep->hwp + FEC_ECNTRL); 4702 fep->wol_flag &= ~FEC_WOL_FLAG_SLEEP_ON; 4703 } else { 4704 pinctrl_pm_select_default_state(&fep->pdev->dev); 4705 } 4706 fec_restart(ndev); 4707 netif_tx_lock_bh(ndev); 4708 netif_device_attach(ndev); 4709 netif_tx_unlock_bh(ndev); 4710 napi_enable(&fep->napi); 4711 phy_init_hw(ndev->phydev); 4712 phy_start(ndev->phydev); 4713 } 4714 rtnl_unlock(); 4715 4716 return 0; 4717 4718 failed_clk: 4719 if (fep->reg_phy) 4720 regulator_disable(fep->reg_phy); 4721 return ret; 4722 } 4723 4724 static int fec_runtime_suspend(struct device *dev) 4725 { 4726 struct net_device *ndev = dev_get_drvdata(dev); 4727 struct fec_enet_private *fep = netdev_priv(ndev); 4728 4729 clk_disable_unprepare(fep->clk_ahb); 4730 clk_disable_unprepare(fep->clk_ipg); 4731 4732 return 0; 4733 } 4734 4735 static int fec_runtime_resume(struct device *dev) 4736 { 4737 struct net_device *ndev = dev_get_drvdata(dev); 4738 struct fec_enet_private *fep = netdev_priv(ndev); 4739 int ret; 4740 4741 ret = clk_prepare_enable(fep->clk_ahb); 4742 if (ret) 4743 return ret; 4744 ret = clk_prepare_enable(fep->clk_ipg); 4745 if (ret) 4746 goto failed_clk_ipg; 4747 4748 return 0; 4749 4750 failed_clk_ipg: 4751 clk_disable_unprepare(fep->clk_ahb); 4752 return ret; 4753 } 4754 4755 static const struct dev_pm_ops fec_pm_ops = { 4756 SYSTEM_SLEEP_PM_OPS(fec_suspend, fec_resume) 4757 RUNTIME_PM_OPS(fec_runtime_suspend, fec_runtime_resume, NULL) 4758 }; 4759 4760 static struct platform_driver fec_driver = { 4761 .driver = { 4762 .name = DRIVER_NAME, 4763 .pm = pm_ptr(&fec_pm_ops), 4764 .of_match_table = fec_dt_ids, 4765 .suppress_bind_attrs = true, 4766 }, 4767 .id_table = fec_devtype, 4768 .probe = fec_probe, 4769 .remove = fec_drv_remove, 4770 }; 4771 4772 module_platform_driver(fec_driver); 4773 4774 MODULE_DESCRIPTION("NXP Fast Ethernet Controller (FEC) driver"); 4775 MODULE_LICENSE("GPL"); 4776