1 // SPDX-License-Identifier: GPL-2.0-only 2 /******************************************************************************* 3 This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers. 4 ST Ethernet IPs are built around a Synopsys IP Core. 5 6 Copyright(C) 2007-2011 STMicroelectronics Ltd 7 8 9 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 10 11 Documentation available at: 12 http://www.stlinux.com 13 Support available at: 14 https://bugzilla.stlinux.com/ 15 *******************************************************************************/ 16 17 #include <linux/clk.h> 18 #include <linux/kernel.h> 19 #include <linux/interrupt.h> 20 #include <linux/ip.h> 21 #include <linux/tcp.h> 22 #include <linux/skbuff.h> 23 #include <linux/ethtool.h> 24 #include <linux/if_ether.h> 25 #include <linux/crc32.h> 26 #include <linux/mii.h> 27 #include <linux/if.h> 28 #include <linux/if_vlan.h> 29 #include <linux/dma-mapping.h> 30 #include <linux/slab.h> 31 #include <linux/prefetch.h> 32 #include <linux/pinctrl/consumer.h> 33 #ifdef CONFIG_DEBUG_FS 34 #include <linux/debugfs.h> 35 #include <linux/seq_file.h> 36 #endif /* CONFIG_DEBUG_FS */ 37 #include <linux/net_tstamp.h> 38 #include <linux/phylink.h> 39 #include <linux/udp.h> 40 #include <net/pkt_cls.h> 41 #include "stmmac_ptp.h" 42 #include "stmmac.h" 43 #include <linux/reset.h> 44 #include <linux/of_mdio.h> 45 #include "dwmac1000.h" 46 #include "dwxgmac2.h" 47 #include "hwif.h" 48 49 #define STMMAC_ALIGN(x) ALIGN(ALIGN(x, SMP_CACHE_BYTES), 16) 50 #define TSO_MAX_BUFF_SIZE (SZ_16K - 1) 51 52 /* Module parameters */ 53 #define TX_TIMEO 5000 54 static int watchdog = TX_TIMEO; 55 module_param(watchdog, int, 0644); 56 MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)"); 57 58 static int debug = -1; 59 module_param(debug, int, 0644); 60 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); 61 62 static int phyaddr = -1; 63 module_param(phyaddr, int, 0444); 64 MODULE_PARM_DESC(phyaddr, "Physical device address"); 65 66 #define STMMAC_TX_THRESH (DMA_TX_SIZE / 4) 67 #define STMMAC_RX_THRESH (DMA_RX_SIZE / 4) 68 69 static int flow_ctrl = FLOW_AUTO; 70 module_param(flow_ctrl, int, 0644); 71 MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]"); 72 73 static int pause = PAUSE_TIME; 74 module_param(pause, int, 0644); 75 MODULE_PARM_DESC(pause, "Flow Control Pause Time"); 76 77 #define TC_DEFAULT 64 78 static int tc = TC_DEFAULT; 79 module_param(tc, int, 0644); 80 MODULE_PARM_DESC(tc, "DMA threshold control value"); 81 82 #define DEFAULT_BUFSIZE 1536 83 static int buf_sz = DEFAULT_BUFSIZE; 84 module_param(buf_sz, int, 0644); 85 MODULE_PARM_DESC(buf_sz, "DMA buffer size"); 86 87 #define STMMAC_RX_COPYBREAK 256 88 89 static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 90 NETIF_MSG_LINK | NETIF_MSG_IFUP | 91 NETIF_MSG_IFDOWN | NETIF_MSG_TIMER); 92 93 #define STMMAC_DEFAULT_LPI_TIMER 1000 94 static int eee_timer = STMMAC_DEFAULT_LPI_TIMER; 95 module_param(eee_timer, int, 0644); 96 MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec"); 97 #define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x)) 98 99 /* By default the driver will use the ring mode to manage tx and rx descriptors, 100 * but allow user to force to use the chain instead of the ring 101 */ 102 static unsigned int chain_mode; 103 module_param(chain_mode, int, 0444); 104 MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode"); 105 106 static irqreturn_t stmmac_interrupt(int irq, void *dev_id); 107 108 #ifdef CONFIG_DEBUG_FS 109 static const struct net_device_ops stmmac_netdev_ops; 110 static void stmmac_init_fs(struct net_device *dev); 111 static void stmmac_exit_fs(struct net_device *dev); 112 #endif 113 114 #define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x)) 115 116 /** 117 * stmmac_verify_args - verify the driver parameters. 118 * Description: it checks the driver parameters and set a default in case of 119 * errors. 120 */ 121 static void stmmac_verify_args(void) 122 { 123 if (unlikely(watchdog < 0)) 124 watchdog = TX_TIMEO; 125 if (unlikely((buf_sz < DEFAULT_BUFSIZE) || (buf_sz > BUF_SIZE_16KiB))) 126 buf_sz = DEFAULT_BUFSIZE; 127 if (unlikely(flow_ctrl > 1)) 128 flow_ctrl = FLOW_AUTO; 129 else if (likely(flow_ctrl < 0)) 130 flow_ctrl = FLOW_OFF; 131 if (unlikely((pause < 0) || (pause > 0xffff))) 132 pause = PAUSE_TIME; 133 if (eee_timer < 0) 134 eee_timer = STMMAC_DEFAULT_LPI_TIMER; 135 } 136 137 /** 138 * stmmac_disable_all_queues - Disable all queues 139 * @priv: driver private structure 140 */ 141 static void stmmac_disable_all_queues(struct stmmac_priv *priv) 142 { 143 u32 rx_queues_cnt = priv->plat->rx_queues_to_use; 144 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 145 u32 maxq = max(rx_queues_cnt, tx_queues_cnt); 146 u32 queue; 147 148 for (queue = 0; queue < maxq; queue++) { 149 struct stmmac_channel *ch = &priv->channel[queue]; 150 151 if (queue < rx_queues_cnt) 152 napi_disable(&ch->rx_napi); 153 if (queue < tx_queues_cnt) 154 napi_disable(&ch->tx_napi); 155 } 156 } 157 158 /** 159 * stmmac_enable_all_queues - Enable all queues 160 * @priv: driver private structure 161 */ 162 static void stmmac_enable_all_queues(struct stmmac_priv *priv) 163 { 164 u32 rx_queues_cnt = priv->plat->rx_queues_to_use; 165 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 166 u32 maxq = max(rx_queues_cnt, tx_queues_cnt); 167 u32 queue; 168 169 for (queue = 0; queue < maxq; queue++) { 170 struct stmmac_channel *ch = &priv->channel[queue]; 171 172 if (queue < rx_queues_cnt) 173 napi_enable(&ch->rx_napi); 174 if (queue < tx_queues_cnt) 175 napi_enable(&ch->tx_napi); 176 } 177 } 178 179 /** 180 * stmmac_stop_all_queues - Stop all queues 181 * @priv: driver private structure 182 */ 183 static void stmmac_stop_all_queues(struct stmmac_priv *priv) 184 { 185 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 186 u32 queue; 187 188 for (queue = 0; queue < tx_queues_cnt; queue++) 189 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue)); 190 } 191 192 /** 193 * stmmac_start_all_queues - Start all queues 194 * @priv: driver private structure 195 */ 196 static void stmmac_start_all_queues(struct stmmac_priv *priv) 197 { 198 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 199 u32 queue; 200 201 for (queue = 0; queue < tx_queues_cnt; queue++) 202 netif_tx_start_queue(netdev_get_tx_queue(priv->dev, queue)); 203 } 204 205 static void stmmac_service_event_schedule(struct stmmac_priv *priv) 206 { 207 if (!test_bit(STMMAC_DOWN, &priv->state) && 208 !test_and_set_bit(STMMAC_SERVICE_SCHED, &priv->state)) 209 queue_work(priv->wq, &priv->service_task); 210 } 211 212 static void stmmac_global_err(struct stmmac_priv *priv) 213 { 214 netif_carrier_off(priv->dev); 215 set_bit(STMMAC_RESET_REQUESTED, &priv->state); 216 stmmac_service_event_schedule(priv); 217 } 218 219 /** 220 * stmmac_clk_csr_set - dynamically set the MDC clock 221 * @priv: driver private structure 222 * Description: this is to dynamically set the MDC clock according to the csr 223 * clock input. 224 * Note: 225 * If a specific clk_csr value is passed from the platform 226 * this means that the CSR Clock Range selection cannot be 227 * changed at run-time and it is fixed (as reported in the driver 228 * documentation). Viceversa the driver will try to set the MDC 229 * clock dynamically according to the actual clock input. 230 */ 231 static void stmmac_clk_csr_set(struct stmmac_priv *priv) 232 { 233 u32 clk_rate; 234 235 clk_rate = clk_get_rate(priv->plat->stmmac_clk); 236 237 /* Platform provided default clk_csr would be assumed valid 238 * for all other cases except for the below mentioned ones. 239 * For values higher than the IEEE 802.3 specified frequency 240 * we can not estimate the proper divider as it is not known 241 * the frequency of clk_csr_i. So we do not change the default 242 * divider. 243 */ 244 if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) { 245 if (clk_rate < CSR_F_35M) 246 priv->clk_csr = STMMAC_CSR_20_35M; 247 else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M)) 248 priv->clk_csr = STMMAC_CSR_35_60M; 249 else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M)) 250 priv->clk_csr = STMMAC_CSR_60_100M; 251 else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M)) 252 priv->clk_csr = STMMAC_CSR_100_150M; 253 else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M)) 254 priv->clk_csr = STMMAC_CSR_150_250M; 255 else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M)) 256 priv->clk_csr = STMMAC_CSR_250_300M; 257 } 258 259 if (priv->plat->has_sun8i) { 260 if (clk_rate > 160000000) 261 priv->clk_csr = 0x03; 262 else if (clk_rate > 80000000) 263 priv->clk_csr = 0x02; 264 else if (clk_rate > 40000000) 265 priv->clk_csr = 0x01; 266 else 267 priv->clk_csr = 0; 268 } 269 270 if (priv->plat->has_xgmac) { 271 if (clk_rate > 400000000) 272 priv->clk_csr = 0x5; 273 else if (clk_rate > 350000000) 274 priv->clk_csr = 0x4; 275 else if (clk_rate > 300000000) 276 priv->clk_csr = 0x3; 277 else if (clk_rate > 250000000) 278 priv->clk_csr = 0x2; 279 else if (clk_rate > 150000000) 280 priv->clk_csr = 0x1; 281 else 282 priv->clk_csr = 0x0; 283 } 284 } 285 286 static void print_pkt(unsigned char *buf, int len) 287 { 288 pr_debug("len = %d byte, buf addr: 0x%p\n", len, buf); 289 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); 290 } 291 292 static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue) 293 { 294 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 295 u32 avail; 296 297 if (tx_q->dirty_tx > tx_q->cur_tx) 298 avail = tx_q->dirty_tx - tx_q->cur_tx - 1; 299 else 300 avail = DMA_TX_SIZE - tx_q->cur_tx + tx_q->dirty_tx - 1; 301 302 return avail; 303 } 304 305 /** 306 * stmmac_rx_dirty - Get RX queue dirty 307 * @priv: driver private structure 308 * @queue: RX queue index 309 */ 310 static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue) 311 { 312 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 313 u32 dirty; 314 315 if (rx_q->dirty_rx <= rx_q->cur_rx) 316 dirty = rx_q->cur_rx - rx_q->dirty_rx; 317 else 318 dirty = DMA_RX_SIZE - rx_q->dirty_rx + rx_q->cur_rx; 319 320 return dirty; 321 } 322 323 /** 324 * stmmac_enable_eee_mode - check and enter in LPI mode 325 * @priv: driver private structure 326 * Description: this function is to verify and enter in LPI mode in case of 327 * EEE. 328 */ 329 static void stmmac_enable_eee_mode(struct stmmac_priv *priv) 330 { 331 u32 tx_cnt = priv->plat->tx_queues_to_use; 332 u32 queue; 333 334 /* check if all TX queues have the work finished */ 335 for (queue = 0; queue < tx_cnt; queue++) { 336 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 337 338 if (tx_q->dirty_tx != tx_q->cur_tx) 339 return; /* still unfinished work */ 340 } 341 342 /* Check and enter in LPI mode */ 343 if (!priv->tx_path_in_lpi_mode) 344 stmmac_set_eee_mode(priv, priv->hw, 345 priv->plat->en_tx_lpi_clockgating); 346 } 347 348 /** 349 * stmmac_disable_eee_mode - disable and exit from LPI mode 350 * @priv: driver private structure 351 * Description: this function is to exit and disable EEE in case of 352 * LPI state is true. This is called by the xmit. 353 */ 354 void stmmac_disable_eee_mode(struct stmmac_priv *priv) 355 { 356 stmmac_reset_eee_mode(priv, priv->hw); 357 del_timer_sync(&priv->eee_ctrl_timer); 358 priv->tx_path_in_lpi_mode = false; 359 } 360 361 /** 362 * stmmac_eee_ctrl_timer - EEE TX SW timer. 363 * @arg : data hook 364 * Description: 365 * if there is no data transfer and if we are not in LPI state, 366 * then MAC Transmitter can be moved to LPI state. 367 */ 368 static void stmmac_eee_ctrl_timer(struct timer_list *t) 369 { 370 struct stmmac_priv *priv = from_timer(priv, t, eee_ctrl_timer); 371 372 stmmac_enable_eee_mode(priv); 373 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer)); 374 } 375 376 /** 377 * stmmac_eee_init - init EEE 378 * @priv: driver private structure 379 * Description: 380 * if the GMAC supports the EEE (from the HW cap reg) and the phy device 381 * can also manage EEE, this function enable the LPI state and start related 382 * timer. 383 */ 384 bool stmmac_eee_init(struct stmmac_priv *priv) 385 { 386 int tx_lpi_timer = priv->tx_lpi_timer; 387 388 /* Using PCS we cannot dial with the phy registers at this stage 389 * so we do not support extra feature like EEE. 390 */ 391 if (priv->hw->pcs == STMMAC_PCS_TBI || 392 priv->hw->pcs == STMMAC_PCS_RTBI) 393 return false; 394 395 /* Check if MAC core supports the EEE feature. */ 396 if (!priv->dma_cap.eee) 397 return false; 398 399 mutex_lock(&priv->lock); 400 401 /* Check if it needs to be deactivated */ 402 if (!priv->eee_active) { 403 if (priv->eee_enabled) { 404 netdev_dbg(priv->dev, "disable EEE\n"); 405 del_timer_sync(&priv->eee_ctrl_timer); 406 stmmac_set_eee_timer(priv, priv->hw, 0, tx_lpi_timer); 407 } 408 mutex_unlock(&priv->lock); 409 return false; 410 } 411 412 if (priv->eee_active && !priv->eee_enabled) { 413 timer_setup(&priv->eee_ctrl_timer, stmmac_eee_ctrl_timer, 0); 414 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer)); 415 stmmac_set_eee_timer(priv, priv->hw, STMMAC_DEFAULT_LIT_LS, 416 tx_lpi_timer); 417 } 418 419 mutex_unlock(&priv->lock); 420 netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n"); 421 return true; 422 } 423 424 /* stmmac_get_tx_hwtstamp - get HW TX timestamps 425 * @priv: driver private structure 426 * @p : descriptor pointer 427 * @skb : the socket buffer 428 * Description : 429 * This function will read timestamp from the descriptor & pass it to stack. 430 * and also perform some sanity checks. 431 */ 432 static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv, 433 struct dma_desc *p, struct sk_buff *skb) 434 { 435 struct skb_shared_hwtstamps shhwtstamp; 436 bool found = false; 437 u64 ns = 0; 438 439 if (!priv->hwts_tx_en) 440 return; 441 442 /* exit if skb doesn't support hw tstamp */ 443 if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))) 444 return; 445 446 /* check tx tstamp status */ 447 if (stmmac_get_tx_timestamp_status(priv, p)) { 448 stmmac_get_timestamp(priv, p, priv->adv_ts, &ns); 449 found = true; 450 } else if (!stmmac_get_mac_tx_timestamp(priv, priv->hw, &ns)) { 451 found = true; 452 } 453 454 if (found) { 455 memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); 456 shhwtstamp.hwtstamp = ns_to_ktime(ns); 457 458 netdev_dbg(priv->dev, "get valid TX hw timestamp %llu\n", ns); 459 /* pass tstamp to stack */ 460 skb_tstamp_tx(skb, &shhwtstamp); 461 } 462 } 463 464 /* stmmac_get_rx_hwtstamp - get HW RX timestamps 465 * @priv: driver private structure 466 * @p : descriptor pointer 467 * @np : next descriptor pointer 468 * @skb : the socket buffer 469 * Description : 470 * This function will read received packet's timestamp from the descriptor 471 * and pass it to stack. It also perform some sanity checks. 472 */ 473 static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p, 474 struct dma_desc *np, struct sk_buff *skb) 475 { 476 struct skb_shared_hwtstamps *shhwtstamp = NULL; 477 struct dma_desc *desc = p; 478 u64 ns = 0; 479 480 if (!priv->hwts_rx_en) 481 return; 482 /* For GMAC4, the valid timestamp is from CTX next desc. */ 483 if (priv->plat->has_gmac4 || priv->plat->has_xgmac) 484 desc = np; 485 486 /* Check if timestamp is available */ 487 if (stmmac_get_rx_timestamp_status(priv, p, np, priv->adv_ts)) { 488 stmmac_get_timestamp(priv, desc, priv->adv_ts, &ns); 489 netdev_dbg(priv->dev, "get valid RX hw timestamp %llu\n", ns); 490 shhwtstamp = skb_hwtstamps(skb); 491 memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); 492 shhwtstamp->hwtstamp = ns_to_ktime(ns); 493 } else { 494 netdev_dbg(priv->dev, "cannot get RX hw timestamp\n"); 495 } 496 } 497 498 /** 499 * stmmac_hwtstamp_set - control hardware timestamping. 500 * @dev: device pointer. 501 * @ifr: An IOCTL specific structure, that can contain a pointer to 502 * a proprietary structure used to pass information to the driver. 503 * Description: 504 * This function configures the MAC to enable/disable both outgoing(TX) 505 * and incoming(RX) packets time stamping based on user input. 506 * Return Value: 507 * 0 on success and an appropriate -ve integer on failure. 508 */ 509 static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) 510 { 511 struct stmmac_priv *priv = netdev_priv(dev); 512 struct hwtstamp_config config; 513 struct timespec64 now; 514 u64 temp = 0; 515 u32 ptp_v2 = 0; 516 u32 tstamp_all = 0; 517 u32 ptp_over_ipv4_udp = 0; 518 u32 ptp_over_ipv6_udp = 0; 519 u32 ptp_over_ethernet = 0; 520 u32 snap_type_sel = 0; 521 u32 ts_master_en = 0; 522 u32 ts_event_en = 0; 523 u32 sec_inc = 0; 524 u32 value = 0; 525 bool xmac; 526 527 xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 528 529 if (!(priv->dma_cap.time_stamp || priv->adv_ts)) { 530 netdev_alert(priv->dev, "No support for HW time stamping\n"); 531 priv->hwts_tx_en = 0; 532 priv->hwts_rx_en = 0; 533 534 return -EOPNOTSUPP; 535 } 536 537 if (copy_from_user(&config, ifr->ifr_data, 538 sizeof(config))) 539 return -EFAULT; 540 541 netdev_dbg(priv->dev, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n", 542 __func__, config.flags, config.tx_type, config.rx_filter); 543 544 /* reserved for future extensions */ 545 if (config.flags) 546 return -EINVAL; 547 548 if (config.tx_type != HWTSTAMP_TX_OFF && 549 config.tx_type != HWTSTAMP_TX_ON) 550 return -ERANGE; 551 552 if (priv->adv_ts) { 553 switch (config.rx_filter) { 554 case HWTSTAMP_FILTER_NONE: 555 /* time stamp no incoming packet at all */ 556 config.rx_filter = HWTSTAMP_FILTER_NONE; 557 break; 558 559 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 560 /* PTP v1, UDP, any kind of event packet */ 561 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; 562 /* 'xmac' hardware can support Sync, Pdelay_Req and 563 * Pdelay_resp by setting bit14 and bits17/16 to 01 564 * This leaves Delay_Req timestamps out. 565 * Enable all events *and* general purpose message 566 * timestamping 567 */ 568 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 569 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 570 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 571 break; 572 573 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 574 /* PTP v1, UDP, Sync packet */ 575 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC; 576 /* take time stamp for SYNC messages only */ 577 ts_event_en = PTP_TCR_TSEVNTENA; 578 579 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 580 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 581 break; 582 583 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 584 /* PTP v1, UDP, Delay_req packet */ 585 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ; 586 /* take time stamp for Delay_Req messages only */ 587 ts_master_en = PTP_TCR_TSMSTRENA; 588 ts_event_en = PTP_TCR_TSEVNTENA; 589 590 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 591 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 592 break; 593 594 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 595 /* PTP v2, UDP, any kind of event packet */ 596 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; 597 ptp_v2 = PTP_TCR_TSVER2ENA; 598 /* take time stamp for all event messages */ 599 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 600 601 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 602 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 603 break; 604 605 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 606 /* PTP v2, UDP, Sync packet */ 607 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC; 608 ptp_v2 = PTP_TCR_TSVER2ENA; 609 /* take time stamp for SYNC messages only */ 610 ts_event_en = PTP_TCR_TSEVNTENA; 611 612 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 613 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 614 break; 615 616 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 617 /* PTP v2, UDP, Delay_req packet */ 618 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ; 619 ptp_v2 = PTP_TCR_TSVER2ENA; 620 /* take time stamp for Delay_Req messages only */ 621 ts_master_en = PTP_TCR_TSMSTRENA; 622 ts_event_en = PTP_TCR_TSEVNTENA; 623 624 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 625 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 626 break; 627 628 case HWTSTAMP_FILTER_PTP_V2_EVENT: 629 /* PTP v2/802.AS1 any layer, any kind of event packet */ 630 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 631 ptp_v2 = PTP_TCR_TSVER2ENA; 632 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 633 if (priv->synopsys_id != DWMAC_CORE_5_10) 634 ts_event_en = PTP_TCR_TSEVNTENA; 635 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 636 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 637 ptp_over_ethernet = PTP_TCR_TSIPENA; 638 break; 639 640 case HWTSTAMP_FILTER_PTP_V2_SYNC: 641 /* PTP v2/802.AS1, any layer, Sync packet */ 642 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC; 643 ptp_v2 = PTP_TCR_TSVER2ENA; 644 /* take time stamp for SYNC messages only */ 645 ts_event_en = PTP_TCR_TSEVNTENA; 646 647 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 648 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 649 ptp_over_ethernet = PTP_TCR_TSIPENA; 650 break; 651 652 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 653 /* PTP v2/802.AS1, any layer, Delay_req packet */ 654 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ; 655 ptp_v2 = PTP_TCR_TSVER2ENA; 656 /* take time stamp for Delay_Req messages only */ 657 ts_master_en = PTP_TCR_TSMSTRENA; 658 ts_event_en = PTP_TCR_TSEVNTENA; 659 660 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 661 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 662 ptp_over_ethernet = PTP_TCR_TSIPENA; 663 break; 664 665 case HWTSTAMP_FILTER_NTP_ALL: 666 case HWTSTAMP_FILTER_ALL: 667 /* time stamp any incoming packet */ 668 config.rx_filter = HWTSTAMP_FILTER_ALL; 669 tstamp_all = PTP_TCR_TSENALL; 670 break; 671 672 default: 673 return -ERANGE; 674 } 675 } else { 676 switch (config.rx_filter) { 677 case HWTSTAMP_FILTER_NONE: 678 config.rx_filter = HWTSTAMP_FILTER_NONE; 679 break; 680 default: 681 /* PTP v1, UDP, any kind of event packet */ 682 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; 683 break; 684 } 685 } 686 priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1); 687 priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON; 688 689 if (!priv->hwts_tx_en && !priv->hwts_rx_en) 690 stmmac_config_hw_tstamping(priv, priv->ptpaddr, 0); 691 else { 692 value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR | 693 tstamp_all | ptp_v2 | ptp_over_ethernet | 694 ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en | 695 ts_master_en | snap_type_sel); 696 stmmac_config_hw_tstamping(priv, priv->ptpaddr, value); 697 698 /* program Sub Second Increment reg */ 699 stmmac_config_sub_second_increment(priv, 700 priv->ptpaddr, priv->plat->clk_ptp_rate, 701 xmac, &sec_inc); 702 temp = div_u64(1000000000ULL, sec_inc); 703 704 /* Store sub second increment and flags for later use */ 705 priv->sub_second_inc = sec_inc; 706 priv->systime_flags = value; 707 708 /* calculate default added value: 709 * formula is : 710 * addend = (2^32)/freq_div_ratio; 711 * where, freq_div_ratio = 1e9ns/sec_inc 712 */ 713 temp = (u64)(temp << 32); 714 priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate); 715 stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend); 716 717 /* initialize system time */ 718 ktime_get_real_ts64(&now); 719 720 /* lower 32 bits of tv_sec are safe until y2106 */ 721 stmmac_init_systime(priv, priv->ptpaddr, 722 (u32)now.tv_sec, now.tv_nsec); 723 } 724 725 memcpy(&priv->tstamp_config, &config, sizeof(config)); 726 727 return copy_to_user(ifr->ifr_data, &config, 728 sizeof(config)) ? -EFAULT : 0; 729 } 730 731 /** 732 * stmmac_hwtstamp_get - read hardware timestamping. 733 * @dev: device pointer. 734 * @ifr: An IOCTL specific structure, that can contain a pointer to 735 * a proprietary structure used to pass information to the driver. 736 * Description: 737 * This function obtain the current hardware timestamping settings 738 as requested. 739 */ 740 static int stmmac_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) 741 { 742 struct stmmac_priv *priv = netdev_priv(dev); 743 struct hwtstamp_config *config = &priv->tstamp_config; 744 745 if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) 746 return -EOPNOTSUPP; 747 748 return copy_to_user(ifr->ifr_data, config, 749 sizeof(*config)) ? -EFAULT : 0; 750 } 751 752 /** 753 * stmmac_init_ptp - init PTP 754 * @priv: driver private structure 755 * Description: this is to verify if the HW supports the PTPv1 or PTPv2. 756 * This is done by looking at the HW cap. register. 757 * This function also registers the ptp driver. 758 */ 759 static int stmmac_init_ptp(struct stmmac_priv *priv) 760 { 761 bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 762 763 if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) 764 return -EOPNOTSUPP; 765 766 priv->adv_ts = 0; 767 /* Check if adv_ts can be enabled for dwmac 4.x / xgmac core */ 768 if (xmac && priv->dma_cap.atime_stamp) 769 priv->adv_ts = 1; 770 /* Dwmac 3.x core with extend_desc can support adv_ts */ 771 else if (priv->extend_desc && priv->dma_cap.atime_stamp) 772 priv->adv_ts = 1; 773 774 if (priv->dma_cap.time_stamp) 775 netdev_info(priv->dev, "IEEE 1588-2002 Timestamp supported\n"); 776 777 if (priv->adv_ts) 778 netdev_info(priv->dev, 779 "IEEE 1588-2008 Advanced Timestamp supported\n"); 780 781 priv->hwts_tx_en = 0; 782 priv->hwts_rx_en = 0; 783 784 stmmac_ptp_register(priv); 785 786 return 0; 787 } 788 789 static void stmmac_release_ptp(struct stmmac_priv *priv) 790 { 791 if (priv->plat->clk_ptp_ref) 792 clk_disable_unprepare(priv->plat->clk_ptp_ref); 793 stmmac_ptp_unregister(priv); 794 } 795 796 /** 797 * stmmac_mac_flow_ctrl - Configure flow control in all queues 798 * @priv: driver private structure 799 * Description: It is used for configuring the flow control in all queues 800 */ 801 static void stmmac_mac_flow_ctrl(struct stmmac_priv *priv, u32 duplex) 802 { 803 u32 tx_cnt = priv->plat->tx_queues_to_use; 804 805 stmmac_flow_ctrl(priv, priv->hw, duplex, priv->flow_ctrl, 806 priv->pause, tx_cnt); 807 } 808 809 static void stmmac_validate(struct phylink_config *config, 810 unsigned long *supported, 811 struct phylink_link_state *state) 812 { 813 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 814 __ETHTOOL_DECLARE_LINK_MODE_MASK(mac_supported) = { 0, }; 815 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 816 int tx_cnt = priv->plat->tx_queues_to_use; 817 int max_speed = priv->plat->max_speed; 818 819 phylink_set(mac_supported, 10baseT_Half); 820 phylink_set(mac_supported, 10baseT_Full); 821 phylink_set(mac_supported, 100baseT_Half); 822 phylink_set(mac_supported, 100baseT_Full); 823 phylink_set(mac_supported, 1000baseT_Half); 824 phylink_set(mac_supported, 1000baseT_Full); 825 phylink_set(mac_supported, 1000baseKX_Full); 826 827 phylink_set(mac_supported, Autoneg); 828 phylink_set(mac_supported, Pause); 829 phylink_set(mac_supported, Asym_Pause); 830 phylink_set_port_modes(mac_supported); 831 832 /* Cut down 1G if asked to */ 833 if ((max_speed > 0) && (max_speed < 1000)) { 834 phylink_set(mask, 1000baseT_Full); 835 phylink_set(mask, 1000baseX_Full); 836 } else if (priv->plat->has_xgmac) { 837 if (!max_speed || (max_speed >= 2500)) { 838 phylink_set(mac_supported, 2500baseT_Full); 839 phylink_set(mac_supported, 2500baseX_Full); 840 } 841 if (!max_speed || (max_speed >= 5000)) { 842 phylink_set(mac_supported, 5000baseT_Full); 843 } 844 if (!max_speed || (max_speed >= 10000)) { 845 phylink_set(mac_supported, 10000baseSR_Full); 846 phylink_set(mac_supported, 10000baseLR_Full); 847 phylink_set(mac_supported, 10000baseER_Full); 848 phylink_set(mac_supported, 10000baseLRM_Full); 849 phylink_set(mac_supported, 10000baseT_Full); 850 phylink_set(mac_supported, 10000baseKX4_Full); 851 phylink_set(mac_supported, 10000baseKR_Full); 852 } 853 if (!max_speed || (max_speed >= 25000)) { 854 phylink_set(mac_supported, 25000baseCR_Full); 855 phylink_set(mac_supported, 25000baseKR_Full); 856 phylink_set(mac_supported, 25000baseSR_Full); 857 } 858 if (!max_speed || (max_speed >= 40000)) { 859 phylink_set(mac_supported, 40000baseKR4_Full); 860 phylink_set(mac_supported, 40000baseCR4_Full); 861 phylink_set(mac_supported, 40000baseSR4_Full); 862 phylink_set(mac_supported, 40000baseLR4_Full); 863 } 864 if (!max_speed || (max_speed >= 50000)) { 865 phylink_set(mac_supported, 50000baseCR2_Full); 866 phylink_set(mac_supported, 50000baseKR2_Full); 867 phylink_set(mac_supported, 50000baseSR2_Full); 868 phylink_set(mac_supported, 50000baseKR_Full); 869 phylink_set(mac_supported, 50000baseSR_Full); 870 phylink_set(mac_supported, 50000baseCR_Full); 871 phylink_set(mac_supported, 50000baseLR_ER_FR_Full); 872 phylink_set(mac_supported, 50000baseDR_Full); 873 } 874 if (!max_speed || (max_speed >= 100000)) { 875 phylink_set(mac_supported, 100000baseKR4_Full); 876 phylink_set(mac_supported, 100000baseSR4_Full); 877 phylink_set(mac_supported, 100000baseCR4_Full); 878 phylink_set(mac_supported, 100000baseLR4_ER4_Full); 879 phylink_set(mac_supported, 100000baseKR2_Full); 880 phylink_set(mac_supported, 100000baseSR2_Full); 881 phylink_set(mac_supported, 100000baseCR2_Full); 882 phylink_set(mac_supported, 100000baseLR2_ER2_FR2_Full); 883 phylink_set(mac_supported, 100000baseDR2_Full); 884 } 885 } 886 887 /* Half-Duplex can only work with single queue */ 888 if (tx_cnt > 1) { 889 phylink_set(mask, 10baseT_Half); 890 phylink_set(mask, 100baseT_Half); 891 phylink_set(mask, 1000baseT_Half); 892 } 893 894 linkmode_and(supported, supported, mac_supported); 895 linkmode_andnot(supported, supported, mask); 896 897 linkmode_and(state->advertising, state->advertising, mac_supported); 898 linkmode_andnot(state->advertising, state->advertising, mask); 899 900 /* If PCS is supported, check which modes it supports. */ 901 stmmac_xpcs_validate(priv, &priv->hw->xpcs_args, supported, state); 902 } 903 904 static void stmmac_mac_pcs_get_state(struct phylink_config *config, 905 struct phylink_link_state *state) 906 { 907 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 908 909 state->link = 0; 910 stmmac_xpcs_get_state(priv, &priv->hw->xpcs_args, state); 911 } 912 913 static void stmmac_mac_config(struct phylink_config *config, unsigned int mode, 914 const struct phylink_link_state *state) 915 { 916 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 917 918 stmmac_xpcs_config(priv, &priv->hw->xpcs_args, state); 919 } 920 921 static void stmmac_mac_an_restart(struct phylink_config *config) 922 { 923 /* Not Supported */ 924 } 925 926 static void stmmac_mac_link_down(struct phylink_config *config, 927 unsigned int mode, phy_interface_t interface) 928 { 929 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 930 931 stmmac_mac_set(priv, priv->ioaddr, false); 932 priv->eee_active = false; 933 stmmac_eee_init(priv); 934 stmmac_set_eee_pls(priv, priv->hw, false); 935 } 936 937 static void stmmac_mac_link_up(struct phylink_config *config, 938 struct phy_device *phy, 939 unsigned int mode, phy_interface_t interface, 940 int speed, int duplex, 941 bool tx_pause, bool rx_pause) 942 { 943 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 944 u32 ctrl; 945 946 stmmac_xpcs_link_up(priv, &priv->hw->xpcs_args, speed, interface); 947 948 ctrl = readl(priv->ioaddr + MAC_CTRL_REG); 949 ctrl &= ~priv->hw->link.speed_mask; 950 951 if (interface == PHY_INTERFACE_MODE_USXGMII) { 952 switch (speed) { 953 case SPEED_10000: 954 ctrl |= priv->hw->link.xgmii.speed10000; 955 break; 956 case SPEED_5000: 957 ctrl |= priv->hw->link.xgmii.speed5000; 958 break; 959 case SPEED_2500: 960 ctrl |= priv->hw->link.xgmii.speed2500; 961 break; 962 default: 963 return; 964 } 965 } else if (interface == PHY_INTERFACE_MODE_XLGMII) { 966 switch (speed) { 967 case SPEED_100000: 968 ctrl |= priv->hw->link.xlgmii.speed100000; 969 break; 970 case SPEED_50000: 971 ctrl |= priv->hw->link.xlgmii.speed50000; 972 break; 973 case SPEED_40000: 974 ctrl |= priv->hw->link.xlgmii.speed40000; 975 break; 976 case SPEED_25000: 977 ctrl |= priv->hw->link.xlgmii.speed25000; 978 break; 979 case SPEED_10000: 980 ctrl |= priv->hw->link.xgmii.speed10000; 981 break; 982 case SPEED_2500: 983 ctrl |= priv->hw->link.speed2500; 984 break; 985 case SPEED_1000: 986 ctrl |= priv->hw->link.speed1000; 987 break; 988 default: 989 return; 990 } 991 } else { 992 switch (speed) { 993 case SPEED_2500: 994 ctrl |= priv->hw->link.speed2500; 995 break; 996 case SPEED_1000: 997 ctrl |= priv->hw->link.speed1000; 998 break; 999 case SPEED_100: 1000 ctrl |= priv->hw->link.speed100; 1001 break; 1002 case SPEED_10: 1003 ctrl |= priv->hw->link.speed10; 1004 break; 1005 default: 1006 return; 1007 } 1008 } 1009 1010 priv->speed = speed; 1011 1012 if (priv->plat->fix_mac_speed) 1013 priv->plat->fix_mac_speed(priv->plat->bsp_priv, speed); 1014 1015 if (!duplex) 1016 ctrl &= ~priv->hw->link.duplex; 1017 else 1018 ctrl |= priv->hw->link.duplex; 1019 1020 /* Flow Control operation */ 1021 if (tx_pause && rx_pause) 1022 stmmac_mac_flow_ctrl(priv, duplex); 1023 1024 writel(ctrl, priv->ioaddr + MAC_CTRL_REG); 1025 1026 stmmac_mac_set(priv, priv->ioaddr, true); 1027 if (phy && priv->dma_cap.eee) { 1028 priv->eee_active = phy_init_eee(phy, 1) >= 0; 1029 priv->eee_enabled = stmmac_eee_init(priv); 1030 stmmac_set_eee_pls(priv, priv->hw, true); 1031 } 1032 } 1033 1034 static const struct phylink_mac_ops stmmac_phylink_mac_ops = { 1035 .validate = stmmac_validate, 1036 .mac_pcs_get_state = stmmac_mac_pcs_get_state, 1037 .mac_config = stmmac_mac_config, 1038 .mac_an_restart = stmmac_mac_an_restart, 1039 .mac_link_down = stmmac_mac_link_down, 1040 .mac_link_up = stmmac_mac_link_up, 1041 }; 1042 1043 /** 1044 * stmmac_check_pcs_mode - verify if RGMII/SGMII is supported 1045 * @priv: driver private structure 1046 * Description: this is to verify if the HW supports the PCS. 1047 * Physical Coding Sublayer (PCS) interface that can be used when the MAC is 1048 * configured for the TBI, RTBI, or SGMII PHY interface. 1049 */ 1050 static void stmmac_check_pcs_mode(struct stmmac_priv *priv) 1051 { 1052 int interface = priv->plat->interface; 1053 1054 if (priv->dma_cap.pcs) { 1055 if ((interface == PHY_INTERFACE_MODE_RGMII) || 1056 (interface == PHY_INTERFACE_MODE_RGMII_ID) || 1057 (interface == PHY_INTERFACE_MODE_RGMII_RXID) || 1058 (interface == PHY_INTERFACE_MODE_RGMII_TXID)) { 1059 netdev_dbg(priv->dev, "PCS RGMII support enabled\n"); 1060 priv->hw->pcs = STMMAC_PCS_RGMII; 1061 } else if (interface == PHY_INTERFACE_MODE_SGMII) { 1062 netdev_dbg(priv->dev, "PCS SGMII support enabled\n"); 1063 priv->hw->pcs = STMMAC_PCS_SGMII; 1064 } 1065 } 1066 } 1067 1068 /** 1069 * stmmac_init_phy - PHY initialization 1070 * @dev: net device structure 1071 * Description: it initializes the driver's PHY state, and attaches the PHY 1072 * to the mac driver. 1073 * Return value: 1074 * 0 on success 1075 */ 1076 static int stmmac_init_phy(struct net_device *dev) 1077 { 1078 struct stmmac_priv *priv = netdev_priv(dev); 1079 struct device_node *node; 1080 int ret; 1081 1082 node = priv->plat->phylink_node; 1083 1084 if (node) 1085 ret = phylink_of_phy_connect(priv->phylink, node, 0); 1086 1087 /* Some DT bindings do not set-up the PHY handle. Let's try to 1088 * manually parse it 1089 */ 1090 if (!node || ret) { 1091 int addr = priv->plat->phy_addr; 1092 struct phy_device *phydev; 1093 1094 phydev = mdiobus_get_phy(priv->mii, addr); 1095 if (!phydev) { 1096 netdev_err(priv->dev, "no phy at addr %d\n", addr); 1097 return -ENODEV; 1098 } 1099 1100 ret = phylink_connect_phy(priv->phylink, phydev); 1101 } 1102 1103 return ret; 1104 } 1105 1106 static int stmmac_phy_setup(struct stmmac_priv *priv) 1107 { 1108 struct fwnode_handle *fwnode = of_fwnode_handle(priv->plat->phylink_node); 1109 int mode = priv->plat->phy_interface; 1110 struct phylink *phylink; 1111 1112 priv->phylink_config.dev = &priv->dev->dev; 1113 priv->phylink_config.type = PHYLINK_NETDEV; 1114 priv->phylink_config.pcs_poll = true; 1115 1116 if (!fwnode) 1117 fwnode = dev_fwnode(priv->device); 1118 1119 phylink = phylink_create(&priv->phylink_config, fwnode, 1120 mode, &stmmac_phylink_mac_ops); 1121 if (IS_ERR(phylink)) 1122 return PTR_ERR(phylink); 1123 1124 priv->phylink = phylink; 1125 return 0; 1126 } 1127 1128 static void stmmac_display_rx_rings(struct stmmac_priv *priv) 1129 { 1130 u32 rx_cnt = priv->plat->rx_queues_to_use; 1131 void *head_rx; 1132 u32 queue; 1133 1134 /* Display RX rings */ 1135 for (queue = 0; queue < rx_cnt; queue++) { 1136 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1137 1138 pr_info("\tRX Queue %u rings\n", queue); 1139 1140 if (priv->extend_desc) 1141 head_rx = (void *)rx_q->dma_erx; 1142 else 1143 head_rx = (void *)rx_q->dma_rx; 1144 1145 /* Display RX ring */ 1146 stmmac_display_ring(priv, head_rx, DMA_RX_SIZE, true); 1147 } 1148 } 1149 1150 static void stmmac_display_tx_rings(struct stmmac_priv *priv) 1151 { 1152 u32 tx_cnt = priv->plat->tx_queues_to_use; 1153 void *head_tx; 1154 u32 queue; 1155 1156 /* Display TX rings */ 1157 for (queue = 0; queue < tx_cnt; queue++) { 1158 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1159 1160 pr_info("\tTX Queue %d rings\n", queue); 1161 1162 if (priv->extend_desc) 1163 head_tx = (void *)tx_q->dma_etx; 1164 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1165 head_tx = (void *)tx_q->dma_entx; 1166 else 1167 head_tx = (void *)tx_q->dma_tx; 1168 1169 stmmac_display_ring(priv, head_tx, DMA_TX_SIZE, false); 1170 } 1171 } 1172 1173 static void stmmac_display_rings(struct stmmac_priv *priv) 1174 { 1175 /* Display RX ring */ 1176 stmmac_display_rx_rings(priv); 1177 1178 /* Display TX ring */ 1179 stmmac_display_tx_rings(priv); 1180 } 1181 1182 static int stmmac_set_bfsize(int mtu, int bufsize) 1183 { 1184 int ret = bufsize; 1185 1186 if (mtu >= BUF_SIZE_8KiB) 1187 ret = BUF_SIZE_16KiB; 1188 else if (mtu >= BUF_SIZE_4KiB) 1189 ret = BUF_SIZE_8KiB; 1190 else if (mtu >= BUF_SIZE_2KiB) 1191 ret = BUF_SIZE_4KiB; 1192 else if (mtu > DEFAULT_BUFSIZE) 1193 ret = BUF_SIZE_2KiB; 1194 else 1195 ret = DEFAULT_BUFSIZE; 1196 1197 return ret; 1198 } 1199 1200 /** 1201 * stmmac_clear_rx_descriptors - clear RX descriptors 1202 * @priv: driver private structure 1203 * @queue: RX queue index 1204 * Description: this function is called to clear the RX descriptors 1205 * in case of both basic and extended descriptors are used. 1206 */ 1207 static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue) 1208 { 1209 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1210 int i; 1211 1212 /* Clear the RX descriptors */ 1213 for (i = 0; i < DMA_RX_SIZE; i++) 1214 if (priv->extend_desc) 1215 stmmac_init_rx_desc(priv, &rx_q->dma_erx[i].basic, 1216 priv->use_riwt, priv->mode, 1217 (i == DMA_RX_SIZE - 1), 1218 priv->dma_buf_sz); 1219 else 1220 stmmac_init_rx_desc(priv, &rx_q->dma_rx[i], 1221 priv->use_riwt, priv->mode, 1222 (i == DMA_RX_SIZE - 1), 1223 priv->dma_buf_sz); 1224 } 1225 1226 /** 1227 * stmmac_clear_tx_descriptors - clear tx descriptors 1228 * @priv: driver private structure 1229 * @queue: TX queue index. 1230 * Description: this function is called to clear the TX descriptors 1231 * in case of both basic and extended descriptors are used. 1232 */ 1233 static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue) 1234 { 1235 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1236 int i; 1237 1238 /* Clear the TX descriptors */ 1239 for (i = 0; i < DMA_TX_SIZE; i++) { 1240 int last = (i == (DMA_TX_SIZE - 1)); 1241 struct dma_desc *p; 1242 1243 if (priv->extend_desc) 1244 p = &tx_q->dma_etx[i].basic; 1245 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1246 p = &tx_q->dma_entx[i].basic; 1247 else 1248 p = &tx_q->dma_tx[i]; 1249 1250 stmmac_init_tx_desc(priv, p, priv->mode, last); 1251 } 1252 } 1253 1254 /** 1255 * stmmac_clear_descriptors - clear descriptors 1256 * @priv: driver private structure 1257 * Description: this function is called to clear the TX and RX descriptors 1258 * in case of both basic and extended descriptors are used. 1259 */ 1260 static void stmmac_clear_descriptors(struct stmmac_priv *priv) 1261 { 1262 u32 rx_queue_cnt = priv->plat->rx_queues_to_use; 1263 u32 tx_queue_cnt = priv->plat->tx_queues_to_use; 1264 u32 queue; 1265 1266 /* Clear the RX descriptors */ 1267 for (queue = 0; queue < rx_queue_cnt; queue++) 1268 stmmac_clear_rx_descriptors(priv, queue); 1269 1270 /* Clear the TX descriptors */ 1271 for (queue = 0; queue < tx_queue_cnt; queue++) 1272 stmmac_clear_tx_descriptors(priv, queue); 1273 } 1274 1275 /** 1276 * stmmac_init_rx_buffers - init the RX descriptor buffer. 1277 * @priv: driver private structure 1278 * @p: descriptor pointer 1279 * @i: descriptor index 1280 * @flags: gfp flag 1281 * @queue: RX queue index 1282 * Description: this function is called to allocate a receive buffer, perform 1283 * the DMA mapping and init the descriptor. 1284 */ 1285 static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p, 1286 int i, gfp_t flags, u32 queue) 1287 { 1288 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1289 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i]; 1290 1291 buf->page = page_pool_dev_alloc_pages(rx_q->page_pool); 1292 if (!buf->page) 1293 return -ENOMEM; 1294 1295 if (priv->sph) { 1296 buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool); 1297 if (!buf->sec_page) 1298 return -ENOMEM; 1299 1300 buf->sec_addr = page_pool_get_dma_addr(buf->sec_page); 1301 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr); 1302 } else { 1303 buf->sec_page = NULL; 1304 } 1305 1306 buf->addr = page_pool_get_dma_addr(buf->page); 1307 stmmac_set_desc_addr(priv, p, buf->addr); 1308 if (priv->dma_buf_sz == BUF_SIZE_16KiB) 1309 stmmac_init_desc3(priv, p); 1310 1311 return 0; 1312 } 1313 1314 /** 1315 * stmmac_free_rx_buffer - free RX dma buffers 1316 * @priv: private structure 1317 * @queue: RX queue index 1318 * @i: buffer index. 1319 */ 1320 static void stmmac_free_rx_buffer(struct stmmac_priv *priv, u32 queue, int i) 1321 { 1322 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1323 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i]; 1324 1325 if (buf->page) 1326 page_pool_put_full_page(rx_q->page_pool, buf->page, false); 1327 buf->page = NULL; 1328 1329 if (buf->sec_page) 1330 page_pool_put_full_page(rx_q->page_pool, buf->sec_page, false); 1331 buf->sec_page = NULL; 1332 } 1333 1334 /** 1335 * stmmac_free_tx_buffer - free RX dma buffers 1336 * @priv: private structure 1337 * @queue: RX queue index 1338 * @i: buffer index. 1339 */ 1340 static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i) 1341 { 1342 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1343 1344 if (tx_q->tx_skbuff_dma[i].buf) { 1345 if (tx_q->tx_skbuff_dma[i].map_as_page) 1346 dma_unmap_page(priv->device, 1347 tx_q->tx_skbuff_dma[i].buf, 1348 tx_q->tx_skbuff_dma[i].len, 1349 DMA_TO_DEVICE); 1350 else 1351 dma_unmap_single(priv->device, 1352 tx_q->tx_skbuff_dma[i].buf, 1353 tx_q->tx_skbuff_dma[i].len, 1354 DMA_TO_DEVICE); 1355 } 1356 1357 if (tx_q->tx_skbuff[i]) { 1358 dev_kfree_skb_any(tx_q->tx_skbuff[i]); 1359 tx_q->tx_skbuff[i] = NULL; 1360 tx_q->tx_skbuff_dma[i].buf = 0; 1361 tx_q->tx_skbuff_dma[i].map_as_page = false; 1362 } 1363 } 1364 1365 /** 1366 * init_dma_rx_desc_rings - init the RX descriptor rings 1367 * @dev: net device structure 1368 * @flags: gfp flag. 1369 * Description: this function initializes the DMA RX descriptors 1370 * and allocates the socket buffers. It supports the chained and ring 1371 * modes. 1372 */ 1373 static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags) 1374 { 1375 struct stmmac_priv *priv = netdev_priv(dev); 1376 u32 rx_count = priv->plat->rx_queues_to_use; 1377 int ret = -ENOMEM; 1378 int queue; 1379 int i; 1380 1381 /* RX INITIALIZATION */ 1382 netif_dbg(priv, probe, priv->dev, 1383 "SKB addresses:\nskb\t\tskb data\tdma data\n"); 1384 1385 for (queue = 0; queue < rx_count; queue++) { 1386 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1387 1388 netif_dbg(priv, probe, priv->dev, 1389 "(%s) dma_rx_phy=0x%08x\n", __func__, 1390 (u32)rx_q->dma_rx_phy); 1391 1392 stmmac_clear_rx_descriptors(priv, queue); 1393 1394 for (i = 0; i < DMA_RX_SIZE; i++) { 1395 struct dma_desc *p; 1396 1397 if (priv->extend_desc) 1398 p = &((rx_q->dma_erx + i)->basic); 1399 else 1400 p = rx_q->dma_rx + i; 1401 1402 ret = stmmac_init_rx_buffers(priv, p, i, flags, 1403 queue); 1404 if (ret) 1405 goto err_init_rx_buffers; 1406 } 1407 1408 rx_q->cur_rx = 0; 1409 rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE); 1410 1411 /* Setup the chained descriptor addresses */ 1412 if (priv->mode == STMMAC_CHAIN_MODE) { 1413 if (priv->extend_desc) 1414 stmmac_mode_init(priv, rx_q->dma_erx, 1415 rx_q->dma_rx_phy, DMA_RX_SIZE, 1); 1416 else 1417 stmmac_mode_init(priv, rx_q->dma_rx, 1418 rx_q->dma_rx_phy, DMA_RX_SIZE, 0); 1419 } 1420 } 1421 1422 return 0; 1423 1424 err_init_rx_buffers: 1425 while (queue >= 0) { 1426 while (--i >= 0) 1427 stmmac_free_rx_buffer(priv, queue, i); 1428 1429 if (queue == 0) 1430 break; 1431 1432 i = DMA_RX_SIZE; 1433 queue--; 1434 } 1435 1436 return ret; 1437 } 1438 1439 /** 1440 * init_dma_tx_desc_rings - init the TX descriptor rings 1441 * @dev: net device structure. 1442 * Description: this function initializes the DMA TX descriptors 1443 * and allocates the socket buffers. It supports the chained and ring 1444 * modes. 1445 */ 1446 static int init_dma_tx_desc_rings(struct net_device *dev) 1447 { 1448 struct stmmac_priv *priv = netdev_priv(dev); 1449 u32 tx_queue_cnt = priv->plat->tx_queues_to_use; 1450 u32 queue; 1451 int i; 1452 1453 for (queue = 0; queue < tx_queue_cnt; queue++) { 1454 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1455 1456 netif_dbg(priv, probe, priv->dev, 1457 "(%s) dma_tx_phy=0x%08x\n", __func__, 1458 (u32)tx_q->dma_tx_phy); 1459 1460 /* Setup the chained descriptor addresses */ 1461 if (priv->mode == STMMAC_CHAIN_MODE) { 1462 if (priv->extend_desc) 1463 stmmac_mode_init(priv, tx_q->dma_etx, 1464 tx_q->dma_tx_phy, DMA_TX_SIZE, 1); 1465 else if (!(tx_q->tbs & STMMAC_TBS_AVAIL)) 1466 stmmac_mode_init(priv, tx_q->dma_tx, 1467 tx_q->dma_tx_phy, DMA_TX_SIZE, 0); 1468 } 1469 1470 for (i = 0; i < DMA_TX_SIZE; i++) { 1471 struct dma_desc *p; 1472 if (priv->extend_desc) 1473 p = &((tx_q->dma_etx + i)->basic); 1474 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1475 p = &((tx_q->dma_entx + i)->basic); 1476 else 1477 p = tx_q->dma_tx + i; 1478 1479 stmmac_clear_desc(priv, p); 1480 1481 tx_q->tx_skbuff_dma[i].buf = 0; 1482 tx_q->tx_skbuff_dma[i].map_as_page = false; 1483 tx_q->tx_skbuff_dma[i].len = 0; 1484 tx_q->tx_skbuff_dma[i].last_segment = false; 1485 tx_q->tx_skbuff[i] = NULL; 1486 } 1487 1488 tx_q->dirty_tx = 0; 1489 tx_q->cur_tx = 0; 1490 tx_q->mss = 0; 1491 1492 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue)); 1493 } 1494 1495 return 0; 1496 } 1497 1498 /** 1499 * init_dma_desc_rings - init the RX/TX descriptor rings 1500 * @dev: net device structure 1501 * @flags: gfp flag. 1502 * Description: this function initializes the DMA RX/TX descriptors 1503 * and allocates the socket buffers. It supports the chained and ring 1504 * modes. 1505 */ 1506 static int init_dma_desc_rings(struct net_device *dev, gfp_t flags) 1507 { 1508 struct stmmac_priv *priv = netdev_priv(dev); 1509 int ret; 1510 1511 ret = init_dma_rx_desc_rings(dev, flags); 1512 if (ret) 1513 return ret; 1514 1515 ret = init_dma_tx_desc_rings(dev); 1516 1517 stmmac_clear_descriptors(priv); 1518 1519 if (netif_msg_hw(priv)) 1520 stmmac_display_rings(priv); 1521 1522 return ret; 1523 } 1524 1525 /** 1526 * dma_free_rx_skbufs - free RX dma buffers 1527 * @priv: private structure 1528 * @queue: RX queue index 1529 */ 1530 static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue) 1531 { 1532 int i; 1533 1534 for (i = 0; i < DMA_RX_SIZE; i++) 1535 stmmac_free_rx_buffer(priv, queue, i); 1536 } 1537 1538 /** 1539 * dma_free_tx_skbufs - free TX dma buffers 1540 * @priv: private structure 1541 * @queue: TX queue index 1542 */ 1543 static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue) 1544 { 1545 int i; 1546 1547 for (i = 0; i < DMA_TX_SIZE; i++) 1548 stmmac_free_tx_buffer(priv, queue, i); 1549 } 1550 1551 /** 1552 * free_dma_rx_desc_resources - free RX dma desc resources 1553 * @priv: private structure 1554 */ 1555 static void free_dma_rx_desc_resources(struct stmmac_priv *priv) 1556 { 1557 u32 rx_count = priv->plat->rx_queues_to_use; 1558 u32 queue; 1559 1560 /* Free RX queue resources */ 1561 for (queue = 0; queue < rx_count; queue++) { 1562 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1563 1564 /* Release the DMA RX socket buffers */ 1565 dma_free_rx_skbufs(priv, queue); 1566 1567 /* Free DMA regions of consistent memory previously allocated */ 1568 if (!priv->extend_desc) 1569 dma_free_coherent(priv->device, 1570 DMA_RX_SIZE * sizeof(struct dma_desc), 1571 rx_q->dma_rx, rx_q->dma_rx_phy); 1572 else 1573 dma_free_coherent(priv->device, DMA_RX_SIZE * 1574 sizeof(struct dma_extended_desc), 1575 rx_q->dma_erx, rx_q->dma_rx_phy); 1576 1577 kfree(rx_q->buf_pool); 1578 if (rx_q->page_pool) 1579 page_pool_destroy(rx_q->page_pool); 1580 } 1581 } 1582 1583 /** 1584 * free_dma_tx_desc_resources - free TX dma desc resources 1585 * @priv: private structure 1586 */ 1587 static void free_dma_tx_desc_resources(struct stmmac_priv *priv) 1588 { 1589 u32 tx_count = priv->plat->tx_queues_to_use; 1590 u32 queue; 1591 1592 /* Free TX queue resources */ 1593 for (queue = 0; queue < tx_count; queue++) { 1594 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1595 size_t size; 1596 void *addr; 1597 1598 /* Release the DMA TX socket buffers */ 1599 dma_free_tx_skbufs(priv, queue); 1600 1601 if (priv->extend_desc) { 1602 size = sizeof(struct dma_extended_desc); 1603 addr = tx_q->dma_etx; 1604 } else if (tx_q->tbs & STMMAC_TBS_AVAIL) { 1605 size = sizeof(struct dma_edesc); 1606 addr = tx_q->dma_entx; 1607 } else { 1608 size = sizeof(struct dma_desc); 1609 addr = tx_q->dma_tx; 1610 } 1611 1612 size *= DMA_TX_SIZE; 1613 1614 dma_free_coherent(priv->device, size, addr, tx_q->dma_tx_phy); 1615 1616 kfree(tx_q->tx_skbuff_dma); 1617 kfree(tx_q->tx_skbuff); 1618 } 1619 } 1620 1621 /** 1622 * alloc_dma_rx_desc_resources - alloc RX resources. 1623 * @priv: private structure 1624 * Description: according to which descriptor can be used (extend or basic) 1625 * this function allocates the resources for TX and RX paths. In case of 1626 * reception, for example, it pre-allocated the RX socket buffer in order to 1627 * allow zero-copy mechanism. 1628 */ 1629 static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv) 1630 { 1631 u32 rx_count = priv->plat->rx_queues_to_use; 1632 int ret = -ENOMEM; 1633 u32 queue; 1634 1635 /* RX queues buffers and DMA */ 1636 for (queue = 0; queue < rx_count; queue++) { 1637 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1638 struct page_pool_params pp_params = { 0 }; 1639 unsigned int num_pages; 1640 1641 rx_q->queue_index = queue; 1642 rx_q->priv_data = priv; 1643 1644 pp_params.flags = PP_FLAG_DMA_MAP; 1645 pp_params.pool_size = DMA_RX_SIZE; 1646 num_pages = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE); 1647 pp_params.order = ilog2(num_pages); 1648 pp_params.nid = dev_to_node(priv->device); 1649 pp_params.dev = priv->device; 1650 pp_params.dma_dir = DMA_FROM_DEVICE; 1651 1652 rx_q->page_pool = page_pool_create(&pp_params); 1653 if (IS_ERR(rx_q->page_pool)) { 1654 ret = PTR_ERR(rx_q->page_pool); 1655 rx_q->page_pool = NULL; 1656 goto err_dma; 1657 } 1658 1659 rx_q->buf_pool = kcalloc(DMA_RX_SIZE, sizeof(*rx_q->buf_pool), 1660 GFP_KERNEL); 1661 if (!rx_q->buf_pool) 1662 goto err_dma; 1663 1664 if (priv->extend_desc) { 1665 rx_q->dma_erx = dma_alloc_coherent(priv->device, 1666 DMA_RX_SIZE * sizeof(struct dma_extended_desc), 1667 &rx_q->dma_rx_phy, 1668 GFP_KERNEL); 1669 if (!rx_q->dma_erx) 1670 goto err_dma; 1671 1672 } else { 1673 rx_q->dma_rx = dma_alloc_coherent(priv->device, 1674 DMA_RX_SIZE * sizeof(struct dma_desc), 1675 &rx_q->dma_rx_phy, 1676 GFP_KERNEL); 1677 if (!rx_q->dma_rx) 1678 goto err_dma; 1679 } 1680 } 1681 1682 return 0; 1683 1684 err_dma: 1685 free_dma_rx_desc_resources(priv); 1686 1687 return ret; 1688 } 1689 1690 /** 1691 * alloc_dma_tx_desc_resources - alloc TX resources. 1692 * @priv: private structure 1693 * Description: according to which descriptor can be used (extend or basic) 1694 * this function allocates the resources for TX and RX paths. In case of 1695 * reception, for example, it pre-allocated the RX socket buffer in order to 1696 * allow zero-copy mechanism. 1697 */ 1698 static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv) 1699 { 1700 u32 tx_count = priv->plat->tx_queues_to_use; 1701 int ret = -ENOMEM; 1702 u32 queue; 1703 1704 /* TX queues buffers and DMA */ 1705 for (queue = 0; queue < tx_count; queue++) { 1706 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1707 size_t size; 1708 void *addr; 1709 1710 tx_q->queue_index = queue; 1711 tx_q->priv_data = priv; 1712 1713 tx_q->tx_skbuff_dma = kcalloc(DMA_TX_SIZE, 1714 sizeof(*tx_q->tx_skbuff_dma), 1715 GFP_KERNEL); 1716 if (!tx_q->tx_skbuff_dma) 1717 goto err_dma; 1718 1719 tx_q->tx_skbuff = kcalloc(DMA_TX_SIZE, 1720 sizeof(struct sk_buff *), 1721 GFP_KERNEL); 1722 if (!tx_q->tx_skbuff) 1723 goto err_dma; 1724 1725 if (priv->extend_desc) 1726 size = sizeof(struct dma_extended_desc); 1727 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1728 size = sizeof(struct dma_edesc); 1729 else 1730 size = sizeof(struct dma_desc); 1731 1732 size *= DMA_TX_SIZE; 1733 1734 addr = dma_alloc_coherent(priv->device, size, 1735 &tx_q->dma_tx_phy, GFP_KERNEL); 1736 if (!addr) 1737 goto err_dma; 1738 1739 if (priv->extend_desc) 1740 tx_q->dma_etx = addr; 1741 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1742 tx_q->dma_entx = addr; 1743 else 1744 tx_q->dma_tx = addr; 1745 } 1746 1747 return 0; 1748 1749 err_dma: 1750 free_dma_tx_desc_resources(priv); 1751 return ret; 1752 } 1753 1754 /** 1755 * alloc_dma_desc_resources - alloc TX/RX resources. 1756 * @priv: private structure 1757 * Description: according to which descriptor can be used (extend or basic) 1758 * this function allocates the resources for TX and RX paths. In case of 1759 * reception, for example, it pre-allocated the RX socket buffer in order to 1760 * allow zero-copy mechanism. 1761 */ 1762 static int alloc_dma_desc_resources(struct stmmac_priv *priv) 1763 { 1764 /* RX Allocation */ 1765 int ret = alloc_dma_rx_desc_resources(priv); 1766 1767 if (ret) 1768 return ret; 1769 1770 ret = alloc_dma_tx_desc_resources(priv); 1771 1772 return ret; 1773 } 1774 1775 /** 1776 * free_dma_desc_resources - free dma desc resources 1777 * @priv: private structure 1778 */ 1779 static void free_dma_desc_resources(struct stmmac_priv *priv) 1780 { 1781 /* Release the DMA RX socket buffers */ 1782 free_dma_rx_desc_resources(priv); 1783 1784 /* Release the DMA TX socket buffers */ 1785 free_dma_tx_desc_resources(priv); 1786 } 1787 1788 /** 1789 * stmmac_mac_enable_rx_queues - Enable MAC rx queues 1790 * @priv: driver private structure 1791 * Description: It is used for enabling the rx queues in the MAC 1792 */ 1793 static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv) 1794 { 1795 u32 rx_queues_count = priv->plat->rx_queues_to_use; 1796 int queue; 1797 u8 mode; 1798 1799 for (queue = 0; queue < rx_queues_count; queue++) { 1800 mode = priv->plat->rx_queues_cfg[queue].mode_to_use; 1801 stmmac_rx_queue_enable(priv, priv->hw, mode, queue); 1802 } 1803 } 1804 1805 /** 1806 * stmmac_start_rx_dma - start RX DMA channel 1807 * @priv: driver private structure 1808 * @chan: RX channel index 1809 * Description: 1810 * This starts a RX DMA channel 1811 */ 1812 static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan) 1813 { 1814 netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan); 1815 stmmac_start_rx(priv, priv->ioaddr, chan); 1816 } 1817 1818 /** 1819 * stmmac_start_tx_dma - start TX DMA channel 1820 * @priv: driver private structure 1821 * @chan: TX channel index 1822 * Description: 1823 * This starts a TX DMA channel 1824 */ 1825 static void stmmac_start_tx_dma(struct stmmac_priv *priv, u32 chan) 1826 { 1827 netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan); 1828 stmmac_start_tx(priv, priv->ioaddr, chan); 1829 } 1830 1831 /** 1832 * stmmac_stop_rx_dma - stop RX DMA channel 1833 * @priv: driver private structure 1834 * @chan: RX channel index 1835 * Description: 1836 * This stops a RX DMA channel 1837 */ 1838 static void stmmac_stop_rx_dma(struct stmmac_priv *priv, u32 chan) 1839 { 1840 netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan); 1841 stmmac_stop_rx(priv, priv->ioaddr, chan); 1842 } 1843 1844 /** 1845 * stmmac_stop_tx_dma - stop TX DMA channel 1846 * @priv: driver private structure 1847 * @chan: TX channel index 1848 * Description: 1849 * This stops a TX DMA channel 1850 */ 1851 static void stmmac_stop_tx_dma(struct stmmac_priv *priv, u32 chan) 1852 { 1853 netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan); 1854 stmmac_stop_tx(priv, priv->ioaddr, chan); 1855 } 1856 1857 /** 1858 * stmmac_start_all_dma - start all RX and TX DMA channels 1859 * @priv: driver private structure 1860 * Description: 1861 * This starts all the RX and TX DMA channels 1862 */ 1863 static void stmmac_start_all_dma(struct stmmac_priv *priv) 1864 { 1865 u32 rx_channels_count = priv->plat->rx_queues_to_use; 1866 u32 tx_channels_count = priv->plat->tx_queues_to_use; 1867 u32 chan = 0; 1868 1869 for (chan = 0; chan < rx_channels_count; chan++) 1870 stmmac_start_rx_dma(priv, chan); 1871 1872 for (chan = 0; chan < tx_channels_count; chan++) 1873 stmmac_start_tx_dma(priv, chan); 1874 } 1875 1876 /** 1877 * stmmac_stop_all_dma - stop all RX and TX DMA channels 1878 * @priv: driver private structure 1879 * Description: 1880 * This stops the RX and TX DMA channels 1881 */ 1882 static void stmmac_stop_all_dma(struct stmmac_priv *priv) 1883 { 1884 u32 rx_channels_count = priv->plat->rx_queues_to_use; 1885 u32 tx_channels_count = priv->plat->tx_queues_to_use; 1886 u32 chan = 0; 1887 1888 for (chan = 0; chan < rx_channels_count; chan++) 1889 stmmac_stop_rx_dma(priv, chan); 1890 1891 for (chan = 0; chan < tx_channels_count; chan++) 1892 stmmac_stop_tx_dma(priv, chan); 1893 } 1894 1895 /** 1896 * stmmac_dma_operation_mode - HW DMA operation mode 1897 * @priv: driver private structure 1898 * Description: it is used for configuring the DMA operation mode register in 1899 * order to program the tx/rx DMA thresholds or Store-And-Forward mode. 1900 */ 1901 static void stmmac_dma_operation_mode(struct stmmac_priv *priv) 1902 { 1903 u32 rx_channels_count = priv->plat->rx_queues_to_use; 1904 u32 tx_channels_count = priv->plat->tx_queues_to_use; 1905 int rxfifosz = priv->plat->rx_fifo_size; 1906 int txfifosz = priv->plat->tx_fifo_size; 1907 u32 txmode = 0; 1908 u32 rxmode = 0; 1909 u32 chan = 0; 1910 u8 qmode = 0; 1911 1912 if (rxfifosz == 0) 1913 rxfifosz = priv->dma_cap.rx_fifo_size; 1914 if (txfifosz == 0) 1915 txfifosz = priv->dma_cap.tx_fifo_size; 1916 1917 /* Adjust for real per queue fifo size */ 1918 rxfifosz /= rx_channels_count; 1919 txfifosz /= tx_channels_count; 1920 1921 if (priv->plat->force_thresh_dma_mode) { 1922 txmode = tc; 1923 rxmode = tc; 1924 } else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) { 1925 /* 1926 * In case of GMAC, SF mode can be enabled 1927 * to perform the TX COE in HW. This depends on: 1928 * 1) TX COE if actually supported 1929 * 2) There is no bugged Jumbo frame support 1930 * that needs to not insert csum in the TDES. 1931 */ 1932 txmode = SF_DMA_MODE; 1933 rxmode = SF_DMA_MODE; 1934 priv->xstats.threshold = SF_DMA_MODE; 1935 } else { 1936 txmode = tc; 1937 rxmode = SF_DMA_MODE; 1938 } 1939 1940 /* configure all channels */ 1941 for (chan = 0; chan < rx_channels_count; chan++) { 1942 qmode = priv->plat->rx_queues_cfg[chan].mode_to_use; 1943 1944 stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan, 1945 rxfifosz, qmode); 1946 stmmac_set_dma_bfsize(priv, priv->ioaddr, priv->dma_buf_sz, 1947 chan); 1948 } 1949 1950 for (chan = 0; chan < tx_channels_count; chan++) { 1951 qmode = priv->plat->tx_queues_cfg[chan].mode_to_use; 1952 1953 stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan, 1954 txfifosz, qmode); 1955 } 1956 } 1957 1958 /** 1959 * stmmac_tx_clean - to manage the transmission completion 1960 * @priv: driver private structure 1961 * @queue: TX queue index 1962 * Description: it reclaims the transmit resources after transmission completes. 1963 */ 1964 static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) 1965 { 1966 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1967 unsigned int bytes_compl = 0, pkts_compl = 0; 1968 unsigned int entry, count = 0; 1969 1970 __netif_tx_lock_bh(netdev_get_tx_queue(priv->dev, queue)); 1971 1972 priv->xstats.tx_clean++; 1973 1974 entry = tx_q->dirty_tx; 1975 while ((entry != tx_q->cur_tx) && (count < budget)) { 1976 struct sk_buff *skb = tx_q->tx_skbuff[entry]; 1977 struct dma_desc *p; 1978 int status; 1979 1980 if (priv->extend_desc) 1981 p = (struct dma_desc *)(tx_q->dma_etx + entry); 1982 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1983 p = &tx_q->dma_entx[entry].basic; 1984 else 1985 p = tx_q->dma_tx + entry; 1986 1987 status = stmmac_tx_status(priv, &priv->dev->stats, 1988 &priv->xstats, p, priv->ioaddr); 1989 /* Check if the descriptor is owned by the DMA */ 1990 if (unlikely(status & tx_dma_own)) 1991 break; 1992 1993 count++; 1994 1995 /* Make sure descriptor fields are read after reading 1996 * the own bit. 1997 */ 1998 dma_rmb(); 1999 2000 /* Just consider the last segment and ...*/ 2001 if (likely(!(status & tx_not_ls))) { 2002 /* ... verify the status error condition */ 2003 if (unlikely(status & tx_err)) { 2004 priv->dev->stats.tx_errors++; 2005 } else { 2006 priv->dev->stats.tx_packets++; 2007 priv->xstats.tx_pkt_n++; 2008 } 2009 stmmac_get_tx_hwtstamp(priv, p, skb); 2010 } 2011 2012 if (likely(tx_q->tx_skbuff_dma[entry].buf)) { 2013 if (tx_q->tx_skbuff_dma[entry].map_as_page) 2014 dma_unmap_page(priv->device, 2015 tx_q->tx_skbuff_dma[entry].buf, 2016 tx_q->tx_skbuff_dma[entry].len, 2017 DMA_TO_DEVICE); 2018 else 2019 dma_unmap_single(priv->device, 2020 tx_q->tx_skbuff_dma[entry].buf, 2021 tx_q->tx_skbuff_dma[entry].len, 2022 DMA_TO_DEVICE); 2023 tx_q->tx_skbuff_dma[entry].buf = 0; 2024 tx_q->tx_skbuff_dma[entry].len = 0; 2025 tx_q->tx_skbuff_dma[entry].map_as_page = false; 2026 } 2027 2028 stmmac_clean_desc3(priv, tx_q, p); 2029 2030 tx_q->tx_skbuff_dma[entry].last_segment = false; 2031 tx_q->tx_skbuff_dma[entry].is_jumbo = false; 2032 2033 if (likely(skb != NULL)) { 2034 pkts_compl++; 2035 bytes_compl += skb->len; 2036 dev_consume_skb_any(skb); 2037 tx_q->tx_skbuff[entry] = NULL; 2038 } 2039 2040 stmmac_release_tx_desc(priv, p, priv->mode); 2041 2042 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); 2043 } 2044 tx_q->dirty_tx = entry; 2045 2046 netdev_tx_completed_queue(netdev_get_tx_queue(priv->dev, queue), 2047 pkts_compl, bytes_compl); 2048 2049 if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv->dev, 2050 queue))) && 2051 stmmac_tx_avail(priv, queue) > STMMAC_TX_THRESH) { 2052 2053 netif_dbg(priv, tx_done, priv->dev, 2054 "%s: restart transmit\n", __func__); 2055 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue)); 2056 } 2057 2058 if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) { 2059 stmmac_enable_eee_mode(priv); 2060 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer)); 2061 } 2062 2063 /* We still have pending packets, let's call for a new scheduling */ 2064 if (tx_q->dirty_tx != tx_q->cur_tx) 2065 mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer)); 2066 2067 __netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue)); 2068 2069 return count; 2070 } 2071 2072 /** 2073 * stmmac_tx_err - to manage the tx error 2074 * @priv: driver private structure 2075 * @chan: channel index 2076 * Description: it cleans the descriptors and restarts the transmission 2077 * in case of transmission errors. 2078 */ 2079 static void stmmac_tx_err(struct stmmac_priv *priv, u32 chan) 2080 { 2081 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2082 2083 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, chan)); 2084 2085 stmmac_stop_tx_dma(priv, chan); 2086 dma_free_tx_skbufs(priv, chan); 2087 stmmac_clear_tx_descriptors(priv, chan); 2088 tx_q->dirty_tx = 0; 2089 tx_q->cur_tx = 0; 2090 tx_q->mss = 0; 2091 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, chan)); 2092 stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2093 tx_q->dma_tx_phy, chan); 2094 stmmac_start_tx_dma(priv, chan); 2095 2096 priv->dev->stats.tx_errors++; 2097 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, chan)); 2098 } 2099 2100 /** 2101 * stmmac_set_dma_operation_mode - Set DMA operation mode by channel 2102 * @priv: driver private structure 2103 * @txmode: TX operating mode 2104 * @rxmode: RX operating mode 2105 * @chan: channel index 2106 * Description: it is used for configuring of the DMA operation mode in 2107 * runtime in order to program the tx/rx DMA thresholds or Store-And-Forward 2108 * mode. 2109 */ 2110 static void stmmac_set_dma_operation_mode(struct stmmac_priv *priv, u32 txmode, 2111 u32 rxmode, u32 chan) 2112 { 2113 u8 rxqmode = priv->plat->rx_queues_cfg[chan].mode_to_use; 2114 u8 txqmode = priv->plat->tx_queues_cfg[chan].mode_to_use; 2115 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2116 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2117 int rxfifosz = priv->plat->rx_fifo_size; 2118 int txfifosz = priv->plat->tx_fifo_size; 2119 2120 if (rxfifosz == 0) 2121 rxfifosz = priv->dma_cap.rx_fifo_size; 2122 if (txfifosz == 0) 2123 txfifosz = priv->dma_cap.tx_fifo_size; 2124 2125 /* Adjust for real per queue fifo size */ 2126 rxfifosz /= rx_channels_count; 2127 txfifosz /= tx_channels_count; 2128 2129 stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan, rxfifosz, rxqmode); 2130 stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan, txfifosz, txqmode); 2131 } 2132 2133 static bool stmmac_safety_feat_interrupt(struct stmmac_priv *priv) 2134 { 2135 int ret; 2136 2137 ret = stmmac_safety_feat_irq_status(priv, priv->dev, 2138 priv->ioaddr, priv->dma_cap.asp, &priv->sstats); 2139 if (ret && (ret != -EINVAL)) { 2140 stmmac_global_err(priv); 2141 return true; 2142 } 2143 2144 return false; 2145 } 2146 2147 static int stmmac_napi_check(struct stmmac_priv *priv, u32 chan) 2148 { 2149 int status = stmmac_dma_interrupt_status(priv, priv->ioaddr, 2150 &priv->xstats, chan); 2151 struct stmmac_channel *ch = &priv->channel[chan]; 2152 unsigned long flags; 2153 2154 if ((status & handle_rx) && (chan < priv->plat->rx_queues_to_use)) { 2155 if (napi_schedule_prep(&ch->rx_napi)) { 2156 spin_lock_irqsave(&ch->lock, flags); 2157 stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 0); 2158 spin_unlock_irqrestore(&ch->lock, flags); 2159 __napi_schedule_irqoff(&ch->rx_napi); 2160 } 2161 } 2162 2163 if ((status & handle_tx) && (chan < priv->plat->tx_queues_to_use)) { 2164 if (napi_schedule_prep(&ch->tx_napi)) { 2165 spin_lock_irqsave(&ch->lock, flags); 2166 stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 0, 1); 2167 spin_unlock_irqrestore(&ch->lock, flags); 2168 __napi_schedule_irqoff(&ch->tx_napi); 2169 } 2170 } 2171 2172 return status; 2173 } 2174 2175 /** 2176 * stmmac_dma_interrupt - DMA ISR 2177 * @priv: driver private structure 2178 * Description: this is the DMA ISR. It is called by the main ISR. 2179 * It calls the dwmac dma routine and schedule poll method in case of some 2180 * work can be done. 2181 */ 2182 static void stmmac_dma_interrupt(struct stmmac_priv *priv) 2183 { 2184 u32 tx_channel_count = priv->plat->tx_queues_to_use; 2185 u32 rx_channel_count = priv->plat->rx_queues_to_use; 2186 u32 channels_to_check = tx_channel_count > rx_channel_count ? 2187 tx_channel_count : rx_channel_count; 2188 u32 chan; 2189 int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)]; 2190 2191 /* Make sure we never check beyond our status buffer. */ 2192 if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status))) 2193 channels_to_check = ARRAY_SIZE(status); 2194 2195 for (chan = 0; chan < channels_to_check; chan++) 2196 status[chan] = stmmac_napi_check(priv, chan); 2197 2198 for (chan = 0; chan < tx_channel_count; chan++) { 2199 if (unlikely(status[chan] & tx_hard_error_bump_tc)) { 2200 /* Try to bump up the dma threshold on this failure */ 2201 if (unlikely(priv->xstats.threshold != SF_DMA_MODE) && 2202 (tc <= 256)) { 2203 tc += 64; 2204 if (priv->plat->force_thresh_dma_mode) 2205 stmmac_set_dma_operation_mode(priv, 2206 tc, 2207 tc, 2208 chan); 2209 else 2210 stmmac_set_dma_operation_mode(priv, 2211 tc, 2212 SF_DMA_MODE, 2213 chan); 2214 priv->xstats.threshold = tc; 2215 } 2216 } else if (unlikely(status[chan] == tx_hard_error)) { 2217 stmmac_tx_err(priv, chan); 2218 } 2219 } 2220 } 2221 2222 /** 2223 * stmmac_mmc_setup: setup the Mac Management Counters (MMC) 2224 * @priv: driver private structure 2225 * Description: this masks the MMC irq, in fact, the counters are managed in SW. 2226 */ 2227 static void stmmac_mmc_setup(struct stmmac_priv *priv) 2228 { 2229 unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET | 2230 MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET; 2231 2232 stmmac_mmc_intr_all_mask(priv, priv->mmcaddr); 2233 2234 if (priv->dma_cap.rmon) { 2235 stmmac_mmc_ctrl(priv, priv->mmcaddr, mode); 2236 memset(&priv->mmc, 0, sizeof(struct stmmac_counters)); 2237 } else 2238 netdev_info(priv->dev, "No MAC Management Counters available\n"); 2239 } 2240 2241 /** 2242 * stmmac_get_hw_features - get MAC capabilities from the HW cap. register. 2243 * @priv: driver private structure 2244 * Description: 2245 * new GMAC chip generations have a new register to indicate the 2246 * presence of the optional feature/functions. 2247 * This can be also used to override the value passed through the 2248 * platform and necessary for old MAC10/100 and GMAC chips. 2249 */ 2250 static int stmmac_get_hw_features(struct stmmac_priv *priv) 2251 { 2252 return stmmac_get_hw_feature(priv, priv->ioaddr, &priv->dma_cap) == 0; 2253 } 2254 2255 /** 2256 * stmmac_check_ether_addr - check if the MAC addr is valid 2257 * @priv: driver private structure 2258 * Description: 2259 * it is to verify if the MAC address is valid, in case of failures it 2260 * generates a random MAC address 2261 */ 2262 static void stmmac_check_ether_addr(struct stmmac_priv *priv) 2263 { 2264 if (!is_valid_ether_addr(priv->dev->dev_addr)) { 2265 stmmac_get_umac_addr(priv, priv->hw, priv->dev->dev_addr, 0); 2266 if (!is_valid_ether_addr(priv->dev->dev_addr)) 2267 eth_hw_addr_random(priv->dev); 2268 dev_info(priv->device, "device MAC address %pM\n", 2269 priv->dev->dev_addr); 2270 } 2271 } 2272 2273 /** 2274 * stmmac_init_dma_engine - DMA init. 2275 * @priv: driver private structure 2276 * Description: 2277 * It inits the DMA invoking the specific MAC/GMAC callback. 2278 * Some DMA parameters can be passed from the platform; 2279 * in case of these are not passed a default is kept for the MAC or GMAC. 2280 */ 2281 static int stmmac_init_dma_engine(struct stmmac_priv *priv) 2282 { 2283 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2284 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2285 u32 dma_csr_ch = max(rx_channels_count, tx_channels_count); 2286 struct stmmac_rx_queue *rx_q; 2287 struct stmmac_tx_queue *tx_q; 2288 u32 chan = 0; 2289 int atds = 0; 2290 int ret = 0; 2291 2292 if (!priv->plat->dma_cfg || !priv->plat->dma_cfg->pbl) { 2293 dev_err(priv->device, "Invalid DMA configuration\n"); 2294 return -EINVAL; 2295 } 2296 2297 if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE)) 2298 atds = 1; 2299 2300 ret = stmmac_reset(priv, priv->ioaddr); 2301 if (ret) { 2302 dev_err(priv->device, "Failed to reset the dma\n"); 2303 return ret; 2304 } 2305 2306 /* DMA Configuration */ 2307 stmmac_dma_init(priv, priv->ioaddr, priv->plat->dma_cfg, atds); 2308 2309 if (priv->plat->axi) 2310 stmmac_axi(priv, priv->ioaddr, priv->plat->axi); 2311 2312 /* DMA CSR Channel configuration */ 2313 for (chan = 0; chan < dma_csr_ch; chan++) 2314 stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan); 2315 2316 /* DMA RX Channel Configuration */ 2317 for (chan = 0; chan < rx_channels_count; chan++) { 2318 rx_q = &priv->rx_queue[chan]; 2319 2320 stmmac_init_rx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2321 rx_q->dma_rx_phy, chan); 2322 2323 rx_q->rx_tail_addr = rx_q->dma_rx_phy + 2324 (DMA_RX_SIZE * sizeof(struct dma_desc)); 2325 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, 2326 rx_q->rx_tail_addr, chan); 2327 } 2328 2329 /* DMA TX Channel Configuration */ 2330 for (chan = 0; chan < tx_channels_count; chan++) { 2331 tx_q = &priv->tx_queue[chan]; 2332 2333 stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2334 tx_q->dma_tx_phy, chan); 2335 2336 tx_q->tx_tail_addr = tx_q->dma_tx_phy; 2337 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, 2338 tx_q->tx_tail_addr, chan); 2339 } 2340 2341 return ret; 2342 } 2343 2344 static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue) 2345 { 2346 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2347 2348 mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer)); 2349 } 2350 2351 /** 2352 * stmmac_tx_timer - mitigation sw timer for tx. 2353 * @data: data pointer 2354 * Description: 2355 * This is the timer handler to directly invoke the stmmac_tx_clean. 2356 */ 2357 static void stmmac_tx_timer(struct timer_list *t) 2358 { 2359 struct stmmac_tx_queue *tx_q = from_timer(tx_q, t, txtimer); 2360 struct stmmac_priv *priv = tx_q->priv_data; 2361 struct stmmac_channel *ch; 2362 2363 ch = &priv->channel[tx_q->queue_index]; 2364 2365 if (likely(napi_schedule_prep(&ch->tx_napi))) { 2366 unsigned long flags; 2367 2368 spin_lock_irqsave(&ch->lock, flags); 2369 stmmac_disable_dma_irq(priv, priv->ioaddr, ch->index, 0, 1); 2370 spin_unlock_irqrestore(&ch->lock, flags); 2371 __napi_schedule(&ch->tx_napi); 2372 } 2373 } 2374 2375 /** 2376 * stmmac_init_coalesce - init mitigation options. 2377 * @priv: driver private structure 2378 * Description: 2379 * This inits the coalesce parameters: i.e. timer rate, 2380 * timer handler and default threshold used for enabling the 2381 * interrupt on completion bit. 2382 */ 2383 static void stmmac_init_coalesce(struct stmmac_priv *priv) 2384 { 2385 u32 tx_channel_count = priv->plat->tx_queues_to_use; 2386 u32 chan; 2387 2388 priv->tx_coal_frames = STMMAC_TX_FRAMES; 2389 priv->tx_coal_timer = STMMAC_COAL_TX_TIMER; 2390 priv->rx_coal_frames = STMMAC_RX_FRAMES; 2391 2392 for (chan = 0; chan < tx_channel_count; chan++) { 2393 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2394 2395 timer_setup(&tx_q->txtimer, stmmac_tx_timer, 0); 2396 } 2397 } 2398 2399 static void stmmac_set_rings_length(struct stmmac_priv *priv) 2400 { 2401 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2402 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2403 u32 chan; 2404 2405 /* set TX ring length */ 2406 for (chan = 0; chan < tx_channels_count; chan++) 2407 stmmac_set_tx_ring_len(priv, priv->ioaddr, 2408 (DMA_TX_SIZE - 1), chan); 2409 2410 /* set RX ring length */ 2411 for (chan = 0; chan < rx_channels_count; chan++) 2412 stmmac_set_rx_ring_len(priv, priv->ioaddr, 2413 (DMA_RX_SIZE - 1), chan); 2414 } 2415 2416 /** 2417 * stmmac_set_tx_queue_weight - Set TX queue weight 2418 * @priv: driver private structure 2419 * Description: It is used for setting TX queues weight 2420 */ 2421 static void stmmac_set_tx_queue_weight(struct stmmac_priv *priv) 2422 { 2423 u32 tx_queues_count = priv->plat->tx_queues_to_use; 2424 u32 weight; 2425 u32 queue; 2426 2427 for (queue = 0; queue < tx_queues_count; queue++) { 2428 weight = priv->plat->tx_queues_cfg[queue].weight; 2429 stmmac_set_mtl_tx_queue_weight(priv, priv->hw, weight, queue); 2430 } 2431 } 2432 2433 /** 2434 * stmmac_configure_cbs - Configure CBS in TX queue 2435 * @priv: driver private structure 2436 * Description: It is used for configuring CBS in AVB TX queues 2437 */ 2438 static void stmmac_configure_cbs(struct stmmac_priv *priv) 2439 { 2440 u32 tx_queues_count = priv->plat->tx_queues_to_use; 2441 u32 mode_to_use; 2442 u32 queue; 2443 2444 /* queue 0 is reserved for legacy traffic */ 2445 for (queue = 1; queue < tx_queues_count; queue++) { 2446 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use; 2447 if (mode_to_use == MTL_QUEUE_DCB) 2448 continue; 2449 2450 stmmac_config_cbs(priv, priv->hw, 2451 priv->plat->tx_queues_cfg[queue].send_slope, 2452 priv->plat->tx_queues_cfg[queue].idle_slope, 2453 priv->plat->tx_queues_cfg[queue].high_credit, 2454 priv->plat->tx_queues_cfg[queue].low_credit, 2455 queue); 2456 } 2457 } 2458 2459 /** 2460 * stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel 2461 * @priv: driver private structure 2462 * Description: It is used for mapping RX queues to RX dma channels 2463 */ 2464 static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv *priv) 2465 { 2466 u32 rx_queues_count = priv->plat->rx_queues_to_use; 2467 u32 queue; 2468 u32 chan; 2469 2470 for (queue = 0; queue < rx_queues_count; queue++) { 2471 chan = priv->plat->rx_queues_cfg[queue].chan; 2472 stmmac_map_mtl_to_dma(priv, priv->hw, queue, chan); 2473 } 2474 } 2475 2476 /** 2477 * stmmac_mac_config_rx_queues_prio - Configure RX Queue priority 2478 * @priv: driver private structure 2479 * Description: It is used for configuring the RX Queue Priority 2480 */ 2481 static void stmmac_mac_config_rx_queues_prio(struct stmmac_priv *priv) 2482 { 2483 u32 rx_queues_count = priv->plat->rx_queues_to_use; 2484 u32 queue; 2485 u32 prio; 2486 2487 for (queue = 0; queue < rx_queues_count; queue++) { 2488 if (!priv->plat->rx_queues_cfg[queue].use_prio) 2489 continue; 2490 2491 prio = priv->plat->rx_queues_cfg[queue].prio; 2492 stmmac_rx_queue_prio(priv, priv->hw, prio, queue); 2493 } 2494 } 2495 2496 /** 2497 * stmmac_mac_config_tx_queues_prio - Configure TX Queue priority 2498 * @priv: driver private structure 2499 * Description: It is used for configuring the TX Queue Priority 2500 */ 2501 static void stmmac_mac_config_tx_queues_prio(struct stmmac_priv *priv) 2502 { 2503 u32 tx_queues_count = priv->plat->tx_queues_to_use; 2504 u32 queue; 2505 u32 prio; 2506 2507 for (queue = 0; queue < tx_queues_count; queue++) { 2508 if (!priv->plat->tx_queues_cfg[queue].use_prio) 2509 continue; 2510 2511 prio = priv->plat->tx_queues_cfg[queue].prio; 2512 stmmac_tx_queue_prio(priv, priv->hw, prio, queue); 2513 } 2514 } 2515 2516 /** 2517 * stmmac_mac_config_rx_queues_routing - Configure RX Queue Routing 2518 * @priv: driver private structure 2519 * Description: It is used for configuring the RX queue routing 2520 */ 2521 static void stmmac_mac_config_rx_queues_routing(struct stmmac_priv *priv) 2522 { 2523 u32 rx_queues_count = priv->plat->rx_queues_to_use; 2524 u32 queue; 2525 u8 packet; 2526 2527 for (queue = 0; queue < rx_queues_count; queue++) { 2528 /* no specific packet type routing specified for the queue */ 2529 if (priv->plat->rx_queues_cfg[queue].pkt_route == 0x0) 2530 continue; 2531 2532 packet = priv->plat->rx_queues_cfg[queue].pkt_route; 2533 stmmac_rx_queue_routing(priv, priv->hw, packet, queue); 2534 } 2535 } 2536 2537 static void stmmac_mac_config_rss(struct stmmac_priv *priv) 2538 { 2539 if (!priv->dma_cap.rssen || !priv->plat->rss_en) { 2540 priv->rss.enable = false; 2541 return; 2542 } 2543 2544 if (priv->dev->features & NETIF_F_RXHASH) 2545 priv->rss.enable = true; 2546 else 2547 priv->rss.enable = false; 2548 2549 stmmac_rss_configure(priv, priv->hw, &priv->rss, 2550 priv->plat->rx_queues_to_use); 2551 } 2552 2553 /** 2554 * stmmac_mtl_configuration - Configure MTL 2555 * @priv: driver private structure 2556 * Description: It is used for configurring MTL 2557 */ 2558 static void stmmac_mtl_configuration(struct stmmac_priv *priv) 2559 { 2560 u32 rx_queues_count = priv->plat->rx_queues_to_use; 2561 u32 tx_queues_count = priv->plat->tx_queues_to_use; 2562 2563 if (tx_queues_count > 1) 2564 stmmac_set_tx_queue_weight(priv); 2565 2566 /* Configure MTL RX algorithms */ 2567 if (rx_queues_count > 1) 2568 stmmac_prog_mtl_rx_algorithms(priv, priv->hw, 2569 priv->plat->rx_sched_algorithm); 2570 2571 /* Configure MTL TX algorithms */ 2572 if (tx_queues_count > 1) 2573 stmmac_prog_mtl_tx_algorithms(priv, priv->hw, 2574 priv->plat->tx_sched_algorithm); 2575 2576 /* Configure CBS in AVB TX queues */ 2577 if (tx_queues_count > 1) 2578 stmmac_configure_cbs(priv); 2579 2580 /* Map RX MTL to DMA channels */ 2581 stmmac_rx_queue_dma_chan_map(priv); 2582 2583 /* Enable MAC RX Queues */ 2584 stmmac_mac_enable_rx_queues(priv); 2585 2586 /* Set RX priorities */ 2587 if (rx_queues_count > 1) 2588 stmmac_mac_config_rx_queues_prio(priv); 2589 2590 /* Set TX priorities */ 2591 if (tx_queues_count > 1) 2592 stmmac_mac_config_tx_queues_prio(priv); 2593 2594 /* Set RX routing */ 2595 if (rx_queues_count > 1) 2596 stmmac_mac_config_rx_queues_routing(priv); 2597 2598 /* Receive Side Scaling */ 2599 if (rx_queues_count > 1) 2600 stmmac_mac_config_rss(priv); 2601 } 2602 2603 static void stmmac_safety_feat_configuration(struct stmmac_priv *priv) 2604 { 2605 if (priv->dma_cap.asp) { 2606 netdev_info(priv->dev, "Enabling Safety Features\n"); 2607 stmmac_safety_feat_config(priv, priv->ioaddr, priv->dma_cap.asp); 2608 } else { 2609 netdev_info(priv->dev, "No Safety Features support found\n"); 2610 } 2611 } 2612 2613 /** 2614 * stmmac_hw_setup - setup mac in a usable state. 2615 * @dev : pointer to the device structure. 2616 * Description: 2617 * this is the main function to setup the HW in a usable state because the 2618 * dma engine is reset, the core registers are configured (e.g. AXI, 2619 * Checksum features, timers). The DMA is ready to start receiving and 2620 * transmitting. 2621 * Return value: 2622 * 0 on success and an appropriate (-)ve integer as defined in errno.h 2623 * file on failure. 2624 */ 2625 static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) 2626 { 2627 struct stmmac_priv *priv = netdev_priv(dev); 2628 u32 rx_cnt = priv->plat->rx_queues_to_use; 2629 u32 tx_cnt = priv->plat->tx_queues_to_use; 2630 u32 chan; 2631 int ret; 2632 2633 /* DMA initialization and SW reset */ 2634 ret = stmmac_init_dma_engine(priv); 2635 if (ret < 0) { 2636 netdev_err(priv->dev, "%s: DMA engine initialization failed\n", 2637 __func__); 2638 return ret; 2639 } 2640 2641 /* Copy the MAC addr into the HW */ 2642 stmmac_set_umac_addr(priv, priv->hw, dev->dev_addr, 0); 2643 2644 /* PS and related bits will be programmed according to the speed */ 2645 if (priv->hw->pcs) { 2646 int speed = priv->plat->mac_port_sel_speed; 2647 2648 if ((speed == SPEED_10) || (speed == SPEED_100) || 2649 (speed == SPEED_1000)) { 2650 priv->hw->ps = speed; 2651 } else { 2652 dev_warn(priv->device, "invalid port speed\n"); 2653 priv->hw->ps = 0; 2654 } 2655 } 2656 2657 /* Initialize the MAC Core */ 2658 stmmac_core_init(priv, priv->hw, dev); 2659 2660 /* Initialize MTL*/ 2661 stmmac_mtl_configuration(priv); 2662 2663 /* Initialize Safety Features */ 2664 stmmac_safety_feat_configuration(priv); 2665 2666 ret = stmmac_rx_ipc(priv, priv->hw); 2667 if (!ret) { 2668 netdev_warn(priv->dev, "RX IPC Checksum Offload disabled\n"); 2669 priv->plat->rx_coe = STMMAC_RX_COE_NONE; 2670 priv->hw->rx_csum = 0; 2671 } 2672 2673 /* Enable the MAC Rx/Tx */ 2674 stmmac_mac_set(priv, priv->ioaddr, true); 2675 2676 /* Set the HW DMA mode and the COE */ 2677 stmmac_dma_operation_mode(priv); 2678 2679 stmmac_mmc_setup(priv); 2680 2681 if (init_ptp) { 2682 ret = clk_prepare_enable(priv->plat->clk_ptp_ref); 2683 if (ret < 0) 2684 netdev_warn(priv->dev, "failed to enable PTP reference clock: %d\n", ret); 2685 2686 ret = stmmac_init_ptp(priv); 2687 if (ret == -EOPNOTSUPP) 2688 netdev_warn(priv->dev, "PTP not supported by HW\n"); 2689 else if (ret) 2690 netdev_warn(priv->dev, "PTP init failed\n"); 2691 } 2692 2693 priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS; 2694 2695 if (priv->use_riwt) { 2696 if (!priv->rx_riwt) 2697 priv->rx_riwt = DEF_DMA_RIWT; 2698 2699 ret = stmmac_rx_watchdog(priv, priv->ioaddr, priv->rx_riwt, rx_cnt); 2700 } 2701 2702 if (priv->hw->pcs) 2703 stmmac_pcs_ctrl_ane(priv, priv->ioaddr, 1, priv->hw->ps, 0); 2704 2705 /* set TX and RX rings length */ 2706 stmmac_set_rings_length(priv); 2707 2708 /* Enable TSO */ 2709 if (priv->tso) { 2710 for (chan = 0; chan < tx_cnt; chan++) 2711 stmmac_enable_tso(priv, priv->ioaddr, 1, chan); 2712 } 2713 2714 /* Enable Split Header */ 2715 if (priv->sph && priv->hw->rx_csum) { 2716 for (chan = 0; chan < rx_cnt; chan++) 2717 stmmac_enable_sph(priv, priv->ioaddr, 1, chan); 2718 } 2719 2720 /* VLAN Tag Insertion */ 2721 if (priv->dma_cap.vlins) 2722 stmmac_enable_vlan(priv, priv->hw, STMMAC_VLAN_INSERT); 2723 2724 /* TBS */ 2725 for (chan = 0; chan < tx_cnt; chan++) { 2726 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2727 int enable = tx_q->tbs & STMMAC_TBS_AVAIL; 2728 2729 stmmac_enable_tbs(priv, priv->ioaddr, enable, chan); 2730 } 2731 2732 /* Start the ball rolling... */ 2733 stmmac_start_all_dma(priv); 2734 2735 return 0; 2736 } 2737 2738 static void stmmac_hw_teardown(struct net_device *dev) 2739 { 2740 struct stmmac_priv *priv = netdev_priv(dev); 2741 2742 clk_disable_unprepare(priv->plat->clk_ptp_ref); 2743 } 2744 2745 /** 2746 * stmmac_open - open entry point of the driver 2747 * @dev : pointer to the device structure. 2748 * Description: 2749 * This function is the open entry point of the driver. 2750 * Return value: 2751 * 0 on success and an appropriate (-)ve integer as defined in errno.h 2752 * file on failure. 2753 */ 2754 static int stmmac_open(struct net_device *dev) 2755 { 2756 struct stmmac_priv *priv = netdev_priv(dev); 2757 int bfsize = 0; 2758 u32 chan; 2759 int ret; 2760 2761 if (priv->hw->pcs != STMMAC_PCS_TBI && 2762 priv->hw->pcs != STMMAC_PCS_RTBI && 2763 priv->hw->xpcs == NULL) { 2764 ret = stmmac_init_phy(dev); 2765 if (ret) { 2766 netdev_err(priv->dev, 2767 "%s: Cannot attach to PHY (error: %d)\n", 2768 __func__, ret); 2769 return ret; 2770 } 2771 } 2772 2773 /* Extra statistics */ 2774 memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); 2775 priv->xstats.threshold = tc; 2776 2777 bfsize = stmmac_set_16kib_bfsize(priv, dev->mtu); 2778 if (bfsize < 0) 2779 bfsize = 0; 2780 2781 if (bfsize < BUF_SIZE_16KiB) 2782 bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz); 2783 2784 priv->dma_buf_sz = bfsize; 2785 buf_sz = bfsize; 2786 2787 priv->rx_copybreak = STMMAC_RX_COPYBREAK; 2788 2789 /* Earlier check for TBS */ 2790 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) { 2791 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2792 int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en; 2793 2794 tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0; 2795 if (stmmac_enable_tbs(priv, priv->ioaddr, tbs_en, chan)) 2796 tx_q->tbs &= ~STMMAC_TBS_AVAIL; 2797 } 2798 2799 ret = alloc_dma_desc_resources(priv); 2800 if (ret < 0) { 2801 netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n", 2802 __func__); 2803 goto dma_desc_error; 2804 } 2805 2806 ret = init_dma_desc_rings(dev, GFP_KERNEL); 2807 if (ret < 0) { 2808 netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n", 2809 __func__); 2810 goto init_error; 2811 } 2812 2813 ret = stmmac_hw_setup(dev, true); 2814 if (ret < 0) { 2815 netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); 2816 goto init_error; 2817 } 2818 2819 stmmac_init_coalesce(priv); 2820 2821 phylink_start(priv->phylink); 2822 2823 /* Request the IRQ lines */ 2824 ret = request_irq(dev->irq, stmmac_interrupt, 2825 IRQF_SHARED, dev->name, dev); 2826 if (unlikely(ret < 0)) { 2827 netdev_err(priv->dev, 2828 "%s: ERROR: allocating the IRQ %d (error: %d)\n", 2829 __func__, dev->irq, ret); 2830 goto irq_error; 2831 } 2832 2833 /* Request the Wake IRQ in case of another line is used for WoL */ 2834 if (priv->wol_irq != dev->irq) { 2835 ret = request_irq(priv->wol_irq, stmmac_interrupt, 2836 IRQF_SHARED, dev->name, dev); 2837 if (unlikely(ret < 0)) { 2838 netdev_err(priv->dev, 2839 "%s: ERROR: allocating the WoL IRQ %d (%d)\n", 2840 __func__, priv->wol_irq, ret); 2841 goto wolirq_error; 2842 } 2843 } 2844 2845 /* Request the IRQ lines */ 2846 if (priv->lpi_irq > 0) { 2847 ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED, 2848 dev->name, dev); 2849 if (unlikely(ret < 0)) { 2850 netdev_err(priv->dev, 2851 "%s: ERROR: allocating the LPI IRQ %d (%d)\n", 2852 __func__, priv->lpi_irq, ret); 2853 goto lpiirq_error; 2854 } 2855 } 2856 2857 stmmac_enable_all_queues(priv); 2858 stmmac_start_all_queues(priv); 2859 2860 return 0; 2861 2862 lpiirq_error: 2863 if (priv->wol_irq != dev->irq) 2864 free_irq(priv->wol_irq, dev); 2865 wolirq_error: 2866 free_irq(dev->irq, dev); 2867 irq_error: 2868 phylink_stop(priv->phylink); 2869 2870 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 2871 del_timer_sync(&priv->tx_queue[chan].txtimer); 2872 2873 stmmac_hw_teardown(dev); 2874 init_error: 2875 free_dma_desc_resources(priv); 2876 dma_desc_error: 2877 phylink_disconnect_phy(priv->phylink); 2878 return ret; 2879 } 2880 2881 /** 2882 * stmmac_release - close entry point of the driver 2883 * @dev : device pointer. 2884 * Description: 2885 * This is the stop entry point of the driver. 2886 */ 2887 static int stmmac_release(struct net_device *dev) 2888 { 2889 struct stmmac_priv *priv = netdev_priv(dev); 2890 u32 chan; 2891 2892 if (priv->eee_enabled) 2893 del_timer_sync(&priv->eee_ctrl_timer); 2894 2895 /* Stop and disconnect the PHY */ 2896 phylink_stop(priv->phylink); 2897 phylink_disconnect_phy(priv->phylink); 2898 2899 stmmac_stop_all_queues(priv); 2900 2901 stmmac_disable_all_queues(priv); 2902 2903 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 2904 del_timer_sync(&priv->tx_queue[chan].txtimer); 2905 2906 /* Free the IRQ lines */ 2907 free_irq(dev->irq, dev); 2908 if (priv->wol_irq != dev->irq) 2909 free_irq(priv->wol_irq, dev); 2910 if (priv->lpi_irq > 0) 2911 free_irq(priv->lpi_irq, dev); 2912 2913 /* Stop TX/RX DMA and clear the descriptors */ 2914 stmmac_stop_all_dma(priv); 2915 2916 /* Release and free the Rx/Tx resources */ 2917 free_dma_desc_resources(priv); 2918 2919 /* Disable the MAC Rx/Tx */ 2920 stmmac_mac_set(priv, priv->ioaddr, false); 2921 2922 netif_carrier_off(dev); 2923 2924 stmmac_release_ptp(priv); 2925 2926 return 0; 2927 } 2928 2929 static bool stmmac_vlan_insert(struct stmmac_priv *priv, struct sk_buff *skb, 2930 struct stmmac_tx_queue *tx_q) 2931 { 2932 u16 tag = 0x0, inner_tag = 0x0; 2933 u32 inner_type = 0x0; 2934 struct dma_desc *p; 2935 2936 if (!priv->dma_cap.vlins) 2937 return false; 2938 if (!skb_vlan_tag_present(skb)) 2939 return false; 2940 if (skb->vlan_proto == htons(ETH_P_8021AD)) { 2941 inner_tag = skb_vlan_tag_get(skb); 2942 inner_type = STMMAC_VLAN_INSERT; 2943 } 2944 2945 tag = skb_vlan_tag_get(skb); 2946 2947 if (tx_q->tbs & STMMAC_TBS_AVAIL) 2948 p = &tx_q->dma_entx[tx_q->cur_tx].basic; 2949 else 2950 p = &tx_q->dma_tx[tx_q->cur_tx]; 2951 2952 if (stmmac_set_desc_vlan_tag(priv, p, tag, inner_tag, inner_type)) 2953 return false; 2954 2955 stmmac_set_tx_owner(priv, p); 2956 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE); 2957 return true; 2958 } 2959 2960 /** 2961 * stmmac_tso_allocator - close entry point of the driver 2962 * @priv: driver private structure 2963 * @des: buffer start address 2964 * @total_len: total length to fill in descriptors 2965 * @last_segmant: condition for the last descriptor 2966 * @queue: TX queue index 2967 * Description: 2968 * This function fills descriptor and request new descriptors according to 2969 * buffer length to fill 2970 */ 2971 static void stmmac_tso_allocator(struct stmmac_priv *priv, dma_addr_t des, 2972 int total_len, bool last_segment, u32 queue) 2973 { 2974 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2975 struct dma_desc *desc; 2976 u32 buff_size; 2977 int tmp_len; 2978 2979 tmp_len = total_len; 2980 2981 while (tmp_len > 0) { 2982 dma_addr_t curr_addr; 2983 2984 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE); 2985 WARN_ON(tx_q->tx_skbuff[tx_q->cur_tx]); 2986 2987 if (tx_q->tbs & STMMAC_TBS_AVAIL) 2988 desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 2989 else 2990 desc = &tx_q->dma_tx[tx_q->cur_tx]; 2991 2992 curr_addr = des + (total_len - tmp_len); 2993 if (priv->dma_cap.addr64 <= 32) 2994 desc->des0 = cpu_to_le32(curr_addr); 2995 else 2996 stmmac_set_desc_addr(priv, desc, curr_addr); 2997 2998 buff_size = tmp_len >= TSO_MAX_BUFF_SIZE ? 2999 TSO_MAX_BUFF_SIZE : tmp_len; 3000 3001 stmmac_prepare_tso_tx_desc(priv, desc, 0, buff_size, 3002 0, 1, 3003 (last_segment) && (tmp_len <= TSO_MAX_BUFF_SIZE), 3004 0, 0); 3005 3006 tmp_len -= TSO_MAX_BUFF_SIZE; 3007 } 3008 } 3009 3010 /** 3011 * stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO) 3012 * @skb : the socket buffer 3013 * @dev : device pointer 3014 * Description: this is the transmit function that is called on TSO frames 3015 * (support available on GMAC4 and newer chips). 3016 * Diagram below show the ring programming in case of TSO frames: 3017 * 3018 * First Descriptor 3019 * -------- 3020 * | DES0 |---> buffer1 = L2/L3/L4 header 3021 * | DES1 |---> TCP Payload (can continue on next descr...) 3022 * | DES2 |---> buffer 1 and 2 len 3023 * | DES3 |---> must set TSE, TCP hdr len-> [22:19]. TCP payload len [17:0] 3024 * -------- 3025 * | 3026 * ... 3027 * | 3028 * -------- 3029 * | DES0 | --| Split TCP Payload on Buffers 1 and 2 3030 * | DES1 | --| 3031 * | DES2 | --> buffer 1 and 2 len 3032 * | DES3 | 3033 * -------- 3034 * 3035 * mss is fixed when enable tso, so w/o programming the TDES3 ctx field. 3036 */ 3037 static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) 3038 { 3039 struct dma_desc *desc, *first, *mss_desc = NULL; 3040 struct stmmac_priv *priv = netdev_priv(dev); 3041 int desc_size, tmp_pay_len = 0, first_tx; 3042 int nfrags = skb_shinfo(skb)->nr_frags; 3043 u32 queue = skb_get_queue_mapping(skb); 3044 unsigned int first_entry, tx_packets; 3045 struct stmmac_tx_queue *tx_q; 3046 bool has_vlan, set_ic; 3047 u8 proto_hdr_len, hdr; 3048 u32 pay_len, mss; 3049 dma_addr_t des; 3050 int i; 3051 3052 tx_q = &priv->tx_queue[queue]; 3053 first_tx = tx_q->cur_tx; 3054 3055 /* Compute header lengths */ 3056 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 3057 proto_hdr_len = skb_transport_offset(skb) + sizeof(struct udphdr); 3058 hdr = sizeof(struct udphdr); 3059 } else { 3060 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 3061 hdr = tcp_hdrlen(skb); 3062 } 3063 3064 /* Desc availability based on threshold should be enough safe */ 3065 if (unlikely(stmmac_tx_avail(priv, queue) < 3066 (((skb->len - proto_hdr_len) / TSO_MAX_BUFF_SIZE + 1)))) { 3067 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) { 3068 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, 3069 queue)); 3070 /* This is a hard error, log it. */ 3071 netdev_err(priv->dev, 3072 "%s: Tx Ring full when queue awake\n", 3073 __func__); 3074 } 3075 return NETDEV_TX_BUSY; 3076 } 3077 3078 pay_len = skb_headlen(skb) - proto_hdr_len; /* no frags */ 3079 3080 mss = skb_shinfo(skb)->gso_size; 3081 3082 /* set new MSS value if needed */ 3083 if (mss != tx_q->mss) { 3084 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3085 mss_desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 3086 else 3087 mss_desc = &tx_q->dma_tx[tx_q->cur_tx]; 3088 3089 stmmac_set_mss(priv, mss_desc, mss); 3090 tx_q->mss = mss; 3091 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE); 3092 WARN_ON(tx_q->tx_skbuff[tx_q->cur_tx]); 3093 } 3094 3095 if (netif_msg_tx_queued(priv)) { 3096 pr_info("%s: hdrlen %d, hdr_len %d, pay_len %d, mss %d\n", 3097 __func__, hdr, proto_hdr_len, pay_len, mss); 3098 pr_info("\tskb->len %d, skb->data_len %d\n", skb->len, 3099 skb->data_len); 3100 } 3101 3102 /* Check if VLAN can be inserted by HW */ 3103 has_vlan = stmmac_vlan_insert(priv, skb, tx_q); 3104 3105 first_entry = tx_q->cur_tx; 3106 WARN_ON(tx_q->tx_skbuff[first_entry]); 3107 3108 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3109 desc = &tx_q->dma_entx[first_entry].basic; 3110 else 3111 desc = &tx_q->dma_tx[first_entry]; 3112 first = desc; 3113 3114 if (has_vlan) 3115 stmmac_set_desc_vlan(priv, first, STMMAC_VLAN_INSERT); 3116 3117 /* first descriptor: fill Headers on Buf1 */ 3118 des = dma_map_single(priv->device, skb->data, skb_headlen(skb), 3119 DMA_TO_DEVICE); 3120 if (dma_mapping_error(priv->device, des)) 3121 goto dma_map_err; 3122 3123 tx_q->tx_skbuff_dma[first_entry].buf = des; 3124 tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb); 3125 3126 if (priv->dma_cap.addr64 <= 32) { 3127 first->des0 = cpu_to_le32(des); 3128 3129 /* Fill start of payload in buff2 of first descriptor */ 3130 if (pay_len) 3131 first->des1 = cpu_to_le32(des + proto_hdr_len); 3132 3133 /* If needed take extra descriptors to fill the remaining payload */ 3134 tmp_pay_len = pay_len - TSO_MAX_BUFF_SIZE; 3135 } else { 3136 stmmac_set_desc_addr(priv, first, des); 3137 tmp_pay_len = pay_len; 3138 des += proto_hdr_len; 3139 pay_len = 0; 3140 } 3141 3142 stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0), queue); 3143 3144 /* Prepare fragments */ 3145 for (i = 0; i < nfrags; i++) { 3146 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 3147 3148 des = skb_frag_dma_map(priv->device, frag, 0, 3149 skb_frag_size(frag), 3150 DMA_TO_DEVICE); 3151 if (dma_mapping_error(priv->device, des)) 3152 goto dma_map_err; 3153 3154 stmmac_tso_allocator(priv, des, skb_frag_size(frag), 3155 (i == nfrags - 1), queue); 3156 3157 tx_q->tx_skbuff_dma[tx_q->cur_tx].buf = des; 3158 tx_q->tx_skbuff_dma[tx_q->cur_tx].len = skb_frag_size(frag); 3159 tx_q->tx_skbuff_dma[tx_q->cur_tx].map_as_page = true; 3160 } 3161 3162 tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true; 3163 3164 /* Only the last descriptor gets to point to the skb. */ 3165 tx_q->tx_skbuff[tx_q->cur_tx] = skb; 3166 3167 /* Manage tx mitigation */ 3168 tx_packets = (tx_q->cur_tx + 1) - first_tx; 3169 tx_q->tx_count_frames += tx_packets; 3170 3171 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && priv->hwts_tx_en) 3172 set_ic = true; 3173 else if (!priv->tx_coal_frames) 3174 set_ic = false; 3175 else if (tx_packets > priv->tx_coal_frames) 3176 set_ic = true; 3177 else if ((tx_q->tx_count_frames % priv->tx_coal_frames) < tx_packets) 3178 set_ic = true; 3179 else 3180 set_ic = false; 3181 3182 if (set_ic) { 3183 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3184 desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 3185 else 3186 desc = &tx_q->dma_tx[tx_q->cur_tx]; 3187 3188 tx_q->tx_count_frames = 0; 3189 stmmac_set_tx_ic(priv, desc); 3190 priv->xstats.tx_set_ic_bit++; 3191 } 3192 3193 /* We've used all descriptors we need for this skb, however, 3194 * advance cur_tx so that it references a fresh descriptor. 3195 * ndo_start_xmit will fill this descriptor the next time it's 3196 * called and stmmac_tx_clean may clean up to this descriptor. 3197 */ 3198 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE); 3199 3200 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) { 3201 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n", 3202 __func__); 3203 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue)); 3204 } 3205 3206 dev->stats.tx_bytes += skb->len; 3207 priv->xstats.tx_tso_frames++; 3208 priv->xstats.tx_tso_nfrags += nfrags; 3209 3210 if (priv->sarc_type) 3211 stmmac_set_desc_sarc(priv, first, priv->sarc_type); 3212 3213 skb_tx_timestamp(skb); 3214 3215 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 3216 priv->hwts_tx_en)) { 3217 /* declare that device is doing timestamping */ 3218 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 3219 stmmac_enable_tx_timestamp(priv, first); 3220 } 3221 3222 /* Complete the first descriptor before granting the DMA */ 3223 stmmac_prepare_tso_tx_desc(priv, first, 1, 3224 proto_hdr_len, 3225 pay_len, 3226 1, tx_q->tx_skbuff_dma[first_entry].last_segment, 3227 hdr / 4, (skb->len - proto_hdr_len)); 3228 3229 /* If context desc is used to change MSS */ 3230 if (mss_desc) { 3231 /* Make sure that first descriptor has been completely 3232 * written, including its own bit. This is because MSS is 3233 * actually before first descriptor, so we need to make 3234 * sure that MSS's own bit is the last thing written. 3235 */ 3236 dma_wmb(); 3237 stmmac_set_tx_owner(priv, mss_desc); 3238 } 3239 3240 /* The own bit must be the latest setting done when prepare the 3241 * descriptor and then barrier is needed to make sure that 3242 * all is coherent before granting the DMA engine. 3243 */ 3244 wmb(); 3245 3246 if (netif_msg_pktdata(priv)) { 3247 pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n", 3248 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry, 3249 tx_q->cur_tx, first, nfrags); 3250 pr_info(">>> frame to be transmitted: "); 3251 print_pkt(skb->data, skb_headlen(skb)); 3252 } 3253 3254 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); 3255 3256 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3257 desc_size = sizeof(struct dma_edesc); 3258 else 3259 desc_size = sizeof(struct dma_desc); 3260 3261 tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); 3262 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); 3263 stmmac_tx_timer_arm(priv, queue); 3264 3265 return NETDEV_TX_OK; 3266 3267 dma_map_err: 3268 dev_err(priv->device, "Tx dma map failed\n"); 3269 dev_kfree_skb(skb); 3270 priv->dev->stats.tx_dropped++; 3271 return NETDEV_TX_OK; 3272 } 3273 3274 /** 3275 * stmmac_xmit - Tx entry point of the driver 3276 * @skb : the socket buffer 3277 * @dev : device pointer 3278 * Description : this is the tx entry point of the driver. 3279 * It programs the chain or the ring and supports oversized frames 3280 * and SG feature. 3281 */ 3282 static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) 3283 { 3284 unsigned int first_entry, tx_packets, enh_desc; 3285 struct stmmac_priv *priv = netdev_priv(dev); 3286 unsigned int nopaged_len = skb_headlen(skb); 3287 int i, csum_insertion = 0, is_jumbo = 0; 3288 u32 queue = skb_get_queue_mapping(skb); 3289 int nfrags = skb_shinfo(skb)->nr_frags; 3290 int gso = skb_shinfo(skb)->gso_type; 3291 struct dma_edesc *tbs_desc = NULL; 3292 int entry, desc_size, first_tx; 3293 struct dma_desc *desc, *first; 3294 struct stmmac_tx_queue *tx_q; 3295 bool has_vlan, set_ic; 3296 dma_addr_t des; 3297 3298 tx_q = &priv->tx_queue[queue]; 3299 first_tx = tx_q->cur_tx; 3300 3301 if (priv->tx_path_in_lpi_mode) 3302 stmmac_disable_eee_mode(priv); 3303 3304 /* Manage oversized TCP frames for GMAC4 device */ 3305 if (skb_is_gso(skb) && priv->tso) { 3306 if (gso & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) 3307 return stmmac_tso_xmit(skb, dev); 3308 if (priv->plat->has_gmac4 && (gso & SKB_GSO_UDP_L4)) 3309 return stmmac_tso_xmit(skb, dev); 3310 } 3311 3312 if (unlikely(stmmac_tx_avail(priv, queue) < nfrags + 1)) { 3313 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) { 3314 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, 3315 queue)); 3316 /* This is a hard error, log it. */ 3317 netdev_err(priv->dev, 3318 "%s: Tx Ring full when queue awake\n", 3319 __func__); 3320 } 3321 return NETDEV_TX_BUSY; 3322 } 3323 3324 /* Check if VLAN can be inserted by HW */ 3325 has_vlan = stmmac_vlan_insert(priv, skb, tx_q); 3326 3327 entry = tx_q->cur_tx; 3328 first_entry = entry; 3329 WARN_ON(tx_q->tx_skbuff[first_entry]); 3330 3331 csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); 3332 3333 if (likely(priv->extend_desc)) 3334 desc = (struct dma_desc *)(tx_q->dma_etx + entry); 3335 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 3336 desc = &tx_q->dma_entx[entry].basic; 3337 else 3338 desc = tx_q->dma_tx + entry; 3339 3340 first = desc; 3341 3342 if (has_vlan) 3343 stmmac_set_desc_vlan(priv, first, STMMAC_VLAN_INSERT); 3344 3345 enh_desc = priv->plat->enh_desc; 3346 /* To program the descriptors according to the size of the frame */ 3347 if (enh_desc) 3348 is_jumbo = stmmac_is_jumbo_frm(priv, skb->len, enh_desc); 3349 3350 if (unlikely(is_jumbo)) { 3351 entry = stmmac_jumbo_frm(priv, tx_q, skb, csum_insertion); 3352 if (unlikely(entry < 0) && (entry != -EINVAL)) 3353 goto dma_map_err; 3354 } 3355 3356 for (i = 0; i < nfrags; i++) { 3357 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 3358 int len = skb_frag_size(frag); 3359 bool last_segment = (i == (nfrags - 1)); 3360 3361 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); 3362 WARN_ON(tx_q->tx_skbuff[entry]); 3363 3364 if (likely(priv->extend_desc)) 3365 desc = (struct dma_desc *)(tx_q->dma_etx + entry); 3366 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 3367 desc = &tx_q->dma_entx[entry].basic; 3368 else 3369 desc = tx_q->dma_tx + entry; 3370 3371 des = skb_frag_dma_map(priv->device, frag, 0, len, 3372 DMA_TO_DEVICE); 3373 if (dma_mapping_error(priv->device, des)) 3374 goto dma_map_err; /* should reuse desc w/o issues */ 3375 3376 tx_q->tx_skbuff_dma[entry].buf = des; 3377 3378 stmmac_set_desc_addr(priv, desc, des); 3379 3380 tx_q->tx_skbuff_dma[entry].map_as_page = true; 3381 tx_q->tx_skbuff_dma[entry].len = len; 3382 tx_q->tx_skbuff_dma[entry].last_segment = last_segment; 3383 3384 /* Prepare the descriptor and set the own bit too */ 3385 stmmac_prepare_tx_desc(priv, desc, 0, len, csum_insertion, 3386 priv->mode, 1, last_segment, skb->len); 3387 } 3388 3389 /* Only the last descriptor gets to point to the skb. */ 3390 tx_q->tx_skbuff[entry] = skb; 3391 3392 /* According to the coalesce parameter the IC bit for the latest 3393 * segment is reset and the timer re-started to clean the tx status. 3394 * This approach takes care about the fragments: desc is the first 3395 * element in case of no SG. 3396 */ 3397 tx_packets = (entry + 1) - first_tx; 3398 tx_q->tx_count_frames += tx_packets; 3399 3400 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && priv->hwts_tx_en) 3401 set_ic = true; 3402 else if (!priv->tx_coal_frames) 3403 set_ic = false; 3404 else if (tx_packets > priv->tx_coal_frames) 3405 set_ic = true; 3406 else if ((tx_q->tx_count_frames % priv->tx_coal_frames) < tx_packets) 3407 set_ic = true; 3408 else 3409 set_ic = false; 3410 3411 if (set_ic) { 3412 if (likely(priv->extend_desc)) 3413 desc = &tx_q->dma_etx[entry].basic; 3414 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 3415 desc = &tx_q->dma_entx[entry].basic; 3416 else 3417 desc = &tx_q->dma_tx[entry]; 3418 3419 tx_q->tx_count_frames = 0; 3420 stmmac_set_tx_ic(priv, desc); 3421 priv->xstats.tx_set_ic_bit++; 3422 } 3423 3424 /* We've used all descriptors we need for this skb, however, 3425 * advance cur_tx so that it references a fresh descriptor. 3426 * ndo_start_xmit will fill this descriptor the next time it's 3427 * called and stmmac_tx_clean may clean up to this descriptor. 3428 */ 3429 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE); 3430 tx_q->cur_tx = entry; 3431 3432 if (netif_msg_pktdata(priv)) { 3433 netdev_dbg(priv->dev, 3434 "%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d", 3435 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry, 3436 entry, first, nfrags); 3437 3438 netdev_dbg(priv->dev, ">>> frame to be transmitted: "); 3439 print_pkt(skb->data, skb->len); 3440 } 3441 3442 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) { 3443 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n", 3444 __func__); 3445 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue)); 3446 } 3447 3448 dev->stats.tx_bytes += skb->len; 3449 3450 if (priv->sarc_type) 3451 stmmac_set_desc_sarc(priv, first, priv->sarc_type); 3452 3453 skb_tx_timestamp(skb); 3454 3455 /* Ready to fill the first descriptor and set the OWN bit w/o any 3456 * problems because all the descriptors are actually ready to be 3457 * passed to the DMA engine. 3458 */ 3459 if (likely(!is_jumbo)) { 3460 bool last_segment = (nfrags == 0); 3461 3462 des = dma_map_single(priv->device, skb->data, 3463 nopaged_len, DMA_TO_DEVICE); 3464 if (dma_mapping_error(priv->device, des)) 3465 goto dma_map_err; 3466 3467 tx_q->tx_skbuff_dma[first_entry].buf = des; 3468 3469 stmmac_set_desc_addr(priv, first, des); 3470 3471 tx_q->tx_skbuff_dma[first_entry].len = nopaged_len; 3472 tx_q->tx_skbuff_dma[first_entry].last_segment = last_segment; 3473 3474 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 3475 priv->hwts_tx_en)) { 3476 /* declare that device is doing timestamping */ 3477 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 3478 stmmac_enable_tx_timestamp(priv, first); 3479 } 3480 3481 /* Prepare the first descriptor setting the OWN bit too */ 3482 stmmac_prepare_tx_desc(priv, first, 1, nopaged_len, 3483 csum_insertion, priv->mode, 0, last_segment, 3484 skb->len); 3485 } 3486 3487 if (tx_q->tbs & STMMAC_TBS_EN) { 3488 struct timespec64 ts = ns_to_timespec64(skb->tstamp); 3489 3490 tbs_desc = &tx_q->dma_entx[first_entry]; 3491 stmmac_set_desc_tbs(priv, tbs_desc, ts.tv_sec, ts.tv_nsec); 3492 } 3493 3494 stmmac_set_tx_owner(priv, first); 3495 3496 /* The own bit must be the latest setting done when prepare the 3497 * descriptor and then barrier is needed to make sure that 3498 * all is coherent before granting the DMA engine. 3499 */ 3500 wmb(); 3501 3502 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); 3503 3504 stmmac_enable_dma_transmission(priv, priv->ioaddr); 3505 3506 if (likely(priv->extend_desc)) 3507 desc_size = sizeof(struct dma_extended_desc); 3508 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 3509 desc_size = sizeof(struct dma_edesc); 3510 else 3511 desc_size = sizeof(struct dma_desc); 3512 3513 tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); 3514 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); 3515 stmmac_tx_timer_arm(priv, queue); 3516 3517 return NETDEV_TX_OK; 3518 3519 dma_map_err: 3520 netdev_err(priv->dev, "Tx DMA map failed\n"); 3521 dev_kfree_skb(skb); 3522 priv->dev->stats.tx_dropped++; 3523 return NETDEV_TX_OK; 3524 } 3525 3526 static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) 3527 { 3528 struct vlan_ethhdr *veth; 3529 __be16 vlan_proto; 3530 u16 vlanid; 3531 3532 veth = (struct vlan_ethhdr *)skb->data; 3533 vlan_proto = veth->h_vlan_proto; 3534 3535 if ((vlan_proto == htons(ETH_P_8021Q) && 3536 dev->features & NETIF_F_HW_VLAN_CTAG_RX) || 3537 (vlan_proto == htons(ETH_P_8021AD) && 3538 dev->features & NETIF_F_HW_VLAN_STAG_RX)) { 3539 /* pop the vlan tag */ 3540 vlanid = ntohs(veth->h_vlan_TCI); 3541 memmove(skb->data + VLAN_HLEN, veth, ETH_ALEN * 2); 3542 skb_pull(skb, VLAN_HLEN); 3543 __vlan_hwaccel_put_tag(skb, vlan_proto, vlanid); 3544 } 3545 } 3546 3547 3548 static inline int stmmac_rx_threshold_count(struct stmmac_rx_queue *rx_q) 3549 { 3550 if (rx_q->rx_zeroc_thresh < STMMAC_RX_THRESH) 3551 return 0; 3552 3553 return 1; 3554 } 3555 3556 /** 3557 * stmmac_rx_refill - refill used skb preallocated buffers 3558 * @priv: driver private structure 3559 * @queue: RX queue index 3560 * Description : this is to reallocate the skb for the reception process 3561 * that is based on zero-copy. 3562 */ 3563 static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) 3564 { 3565 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 3566 int len, dirty = stmmac_rx_dirty(priv, queue); 3567 unsigned int entry = rx_q->dirty_rx; 3568 3569 len = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE) * PAGE_SIZE; 3570 3571 while (dirty-- > 0) { 3572 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[entry]; 3573 struct dma_desc *p; 3574 bool use_rx_wd; 3575 3576 if (priv->extend_desc) 3577 p = (struct dma_desc *)(rx_q->dma_erx + entry); 3578 else 3579 p = rx_q->dma_rx + entry; 3580 3581 if (!buf->page) { 3582 buf->page = page_pool_dev_alloc_pages(rx_q->page_pool); 3583 if (!buf->page) 3584 break; 3585 } 3586 3587 if (priv->sph && !buf->sec_page) { 3588 buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool); 3589 if (!buf->sec_page) 3590 break; 3591 3592 buf->sec_addr = page_pool_get_dma_addr(buf->sec_page); 3593 3594 dma_sync_single_for_device(priv->device, buf->sec_addr, 3595 len, DMA_FROM_DEVICE); 3596 } 3597 3598 buf->addr = page_pool_get_dma_addr(buf->page); 3599 3600 /* Sync whole allocation to device. This will invalidate old 3601 * data. 3602 */ 3603 dma_sync_single_for_device(priv->device, buf->addr, len, 3604 DMA_FROM_DEVICE); 3605 3606 stmmac_set_desc_addr(priv, p, buf->addr); 3607 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr); 3608 stmmac_refill_desc3(priv, rx_q, p); 3609 3610 rx_q->rx_count_frames++; 3611 rx_q->rx_count_frames += priv->rx_coal_frames; 3612 if (rx_q->rx_count_frames > priv->rx_coal_frames) 3613 rx_q->rx_count_frames = 0; 3614 3615 use_rx_wd = !priv->rx_coal_frames; 3616 use_rx_wd |= rx_q->rx_count_frames > 0; 3617 if (!priv->use_riwt) 3618 use_rx_wd = false; 3619 3620 dma_wmb(); 3621 stmmac_set_rx_owner(priv, p, use_rx_wd); 3622 3623 entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE); 3624 } 3625 rx_q->dirty_rx = entry; 3626 rx_q->rx_tail_addr = rx_q->dma_rx_phy + 3627 (rx_q->dirty_rx * sizeof(struct dma_desc)); 3628 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue); 3629 } 3630 3631 static unsigned int stmmac_rx_buf1_len(struct stmmac_priv *priv, 3632 struct dma_desc *p, 3633 int status, unsigned int len) 3634 { 3635 int ret, coe = priv->hw->rx_csum; 3636 unsigned int plen = 0, hlen = 0; 3637 3638 /* Not first descriptor, buffer is always zero */ 3639 if (priv->sph && len) 3640 return 0; 3641 3642 /* First descriptor, get split header length */ 3643 ret = stmmac_get_rx_header_len(priv, p, &hlen); 3644 if (priv->sph && hlen) { 3645 priv->xstats.rx_split_hdr_pkt_n++; 3646 return hlen; 3647 } 3648 3649 /* First descriptor, not last descriptor and not split header */ 3650 if (status & rx_not_ls) 3651 return priv->dma_buf_sz; 3652 3653 plen = stmmac_get_rx_frame_len(priv, p, coe); 3654 3655 /* First descriptor and last descriptor and not split header */ 3656 return min_t(unsigned int, priv->dma_buf_sz, plen); 3657 } 3658 3659 static unsigned int stmmac_rx_buf2_len(struct stmmac_priv *priv, 3660 struct dma_desc *p, 3661 int status, unsigned int len) 3662 { 3663 int coe = priv->hw->rx_csum; 3664 unsigned int plen = 0; 3665 3666 /* Not split header, buffer is not available */ 3667 if (!priv->sph) 3668 return 0; 3669 3670 /* Not last descriptor */ 3671 if (status & rx_not_ls) 3672 return priv->dma_buf_sz; 3673 3674 plen = stmmac_get_rx_frame_len(priv, p, coe); 3675 3676 /* Last descriptor */ 3677 return plen - len; 3678 } 3679 3680 /** 3681 * stmmac_rx - manage the receive process 3682 * @priv: driver private structure 3683 * @limit: napi bugget 3684 * @queue: RX queue index. 3685 * Description : this the function called by the napi poll method. 3686 * It gets all the frames inside the ring. 3687 */ 3688 static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) 3689 { 3690 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 3691 struct stmmac_channel *ch = &priv->channel[queue]; 3692 unsigned int count = 0, error = 0, len = 0; 3693 int status = 0, coe = priv->hw->rx_csum; 3694 unsigned int next_entry = rx_q->cur_rx; 3695 struct sk_buff *skb = NULL; 3696 3697 if (netif_msg_rx_status(priv)) { 3698 void *rx_head; 3699 3700 netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__); 3701 if (priv->extend_desc) 3702 rx_head = (void *)rx_q->dma_erx; 3703 else 3704 rx_head = (void *)rx_q->dma_rx; 3705 3706 stmmac_display_ring(priv, rx_head, DMA_RX_SIZE, true); 3707 } 3708 while (count < limit) { 3709 unsigned int buf1_len = 0, buf2_len = 0; 3710 enum pkt_hash_types hash_type; 3711 struct stmmac_rx_buffer *buf; 3712 struct dma_desc *np, *p; 3713 int entry; 3714 u32 hash; 3715 3716 if (!count && rx_q->state_saved) { 3717 skb = rx_q->state.skb; 3718 error = rx_q->state.error; 3719 len = rx_q->state.len; 3720 } else { 3721 rx_q->state_saved = false; 3722 skb = NULL; 3723 error = 0; 3724 len = 0; 3725 } 3726 3727 if (count >= limit) 3728 break; 3729 3730 read_again: 3731 buf1_len = 0; 3732 buf2_len = 0; 3733 entry = next_entry; 3734 buf = &rx_q->buf_pool[entry]; 3735 3736 if (priv->extend_desc) 3737 p = (struct dma_desc *)(rx_q->dma_erx + entry); 3738 else 3739 p = rx_q->dma_rx + entry; 3740 3741 /* read the status of the incoming frame */ 3742 status = stmmac_rx_status(priv, &priv->dev->stats, 3743 &priv->xstats, p); 3744 /* check if managed by the DMA otherwise go ahead */ 3745 if (unlikely(status & dma_own)) 3746 break; 3747 3748 rx_q->cur_rx = STMMAC_GET_ENTRY(rx_q->cur_rx, DMA_RX_SIZE); 3749 next_entry = rx_q->cur_rx; 3750 3751 if (priv->extend_desc) 3752 np = (struct dma_desc *)(rx_q->dma_erx + next_entry); 3753 else 3754 np = rx_q->dma_rx + next_entry; 3755 3756 prefetch(np); 3757 3758 if (priv->extend_desc) 3759 stmmac_rx_extended_status(priv, &priv->dev->stats, 3760 &priv->xstats, rx_q->dma_erx + entry); 3761 if (unlikely(status == discard_frame)) { 3762 page_pool_recycle_direct(rx_q->page_pool, buf->page); 3763 buf->page = NULL; 3764 error = 1; 3765 if (!priv->hwts_rx_en) 3766 priv->dev->stats.rx_errors++; 3767 } 3768 3769 if (unlikely(error && (status & rx_not_ls))) 3770 goto read_again; 3771 if (unlikely(error)) { 3772 dev_kfree_skb(skb); 3773 skb = NULL; 3774 count++; 3775 continue; 3776 } 3777 3778 /* Buffer is good. Go on. */ 3779 3780 prefetch(page_address(buf->page)); 3781 if (buf->sec_page) 3782 prefetch(page_address(buf->sec_page)); 3783 3784 buf1_len = stmmac_rx_buf1_len(priv, p, status, len); 3785 len += buf1_len; 3786 buf2_len = stmmac_rx_buf2_len(priv, p, status, len); 3787 len += buf2_len; 3788 3789 /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3 3790 * Type frames (LLC/LLC-SNAP) 3791 * 3792 * llc_snap is never checked in GMAC >= 4, so this ACS 3793 * feature is always disabled and packets need to be 3794 * stripped manually. 3795 */ 3796 if (likely(!(status & rx_not_ls)) && 3797 (likely(priv->synopsys_id >= DWMAC_CORE_4_00) || 3798 unlikely(status != llc_snap))) { 3799 if (buf2_len) 3800 buf2_len -= ETH_FCS_LEN; 3801 else 3802 buf1_len -= ETH_FCS_LEN; 3803 3804 len -= ETH_FCS_LEN; 3805 } 3806 3807 if (!skb) { 3808 skb = napi_alloc_skb(&ch->rx_napi, buf1_len); 3809 if (!skb) { 3810 priv->dev->stats.rx_dropped++; 3811 count++; 3812 goto drain_data; 3813 } 3814 3815 dma_sync_single_for_cpu(priv->device, buf->addr, 3816 buf1_len, DMA_FROM_DEVICE); 3817 skb_copy_to_linear_data(skb, page_address(buf->page), 3818 buf1_len); 3819 skb_put(skb, buf1_len); 3820 3821 /* Data payload copied into SKB, page ready for recycle */ 3822 page_pool_recycle_direct(rx_q->page_pool, buf->page); 3823 buf->page = NULL; 3824 } else if (buf1_len) { 3825 dma_sync_single_for_cpu(priv->device, buf->addr, 3826 buf1_len, DMA_FROM_DEVICE); 3827 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, 3828 buf->page, 0, buf1_len, 3829 priv->dma_buf_sz); 3830 3831 /* Data payload appended into SKB */ 3832 page_pool_release_page(rx_q->page_pool, buf->page); 3833 buf->page = NULL; 3834 } 3835 3836 if (buf2_len) { 3837 dma_sync_single_for_cpu(priv->device, buf->sec_addr, 3838 buf2_len, DMA_FROM_DEVICE); 3839 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, 3840 buf->sec_page, 0, buf2_len, 3841 priv->dma_buf_sz); 3842 3843 /* Data payload appended into SKB */ 3844 page_pool_release_page(rx_q->page_pool, buf->sec_page); 3845 buf->sec_page = NULL; 3846 } 3847 3848 drain_data: 3849 if (likely(status & rx_not_ls)) 3850 goto read_again; 3851 if (!skb) 3852 continue; 3853 3854 /* Got entire packet into SKB. Finish it. */ 3855 3856 stmmac_get_rx_hwtstamp(priv, p, np, skb); 3857 stmmac_rx_vlan(priv->dev, skb); 3858 skb->protocol = eth_type_trans(skb, priv->dev); 3859 3860 if (unlikely(!coe)) 3861 skb_checksum_none_assert(skb); 3862 else 3863 skb->ip_summed = CHECKSUM_UNNECESSARY; 3864 3865 if (!stmmac_get_rx_hash(priv, p, &hash, &hash_type)) 3866 skb_set_hash(skb, hash, hash_type); 3867 3868 skb_record_rx_queue(skb, queue); 3869 napi_gro_receive(&ch->rx_napi, skb); 3870 skb = NULL; 3871 3872 priv->dev->stats.rx_packets++; 3873 priv->dev->stats.rx_bytes += len; 3874 count++; 3875 } 3876 3877 if (status & rx_not_ls || skb) { 3878 rx_q->state_saved = true; 3879 rx_q->state.skb = skb; 3880 rx_q->state.error = error; 3881 rx_q->state.len = len; 3882 } 3883 3884 stmmac_rx_refill(priv, queue); 3885 3886 priv->xstats.rx_pkt_n += count; 3887 3888 return count; 3889 } 3890 3891 static int stmmac_napi_poll_rx(struct napi_struct *napi, int budget) 3892 { 3893 struct stmmac_channel *ch = 3894 container_of(napi, struct stmmac_channel, rx_napi); 3895 struct stmmac_priv *priv = ch->priv_data; 3896 u32 chan = ch->index; 3897 int work_done; 3898 3899 priv->xstats.napi_poll++; 3900 3901 work_done = stmmac_rx(priv, budget, chan); 3902 if (work_done < budget && napi_complete_done(napi, work_done)) { 3903 unsigned long flags; 3904 3905 spin_lock_irqsave(&ch->lock, flags); 3906 stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 1, 0); 3907 spin_unlock_irqrestore(&ch->lock, flags); 3908 } 3909 3910 return work_done; 3911 } 3912 3913 static int stmmac_napi_poll_tx(struct napi_struct *napi, int budget) 3914 { 3915 struct stmmac_channel *ch = 3916 container_of(napi, struct stmmac_channel, tx_napi); 3917 struct stmmac_priv *priv = ch->priv_data; 3918 u32 chan = ch->index; 3919 int work_done; 3920 3921 priv->xstats.napi_poll++; 3922 3923 work_done = stmmac_tx_clean(priv, DMA_TX_SIZE, chan); 3924 work_done = min(work_done, budget); 3925 3926 if (work_done < budget && napi_complete_done(napi, work_done)) { 3927 unsigned long flags; 3928 3929 spin_lock_irqsave(&ch->lock, flags); 3930 stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 0, 1); 3931 spin_unlock_irqrestore(&ch->lock, flags); 3932 } 3933 3934 return work_done; 3935 } 3936 3937 /** 3938 * stmmac_tx_timeout 3939 * @dev : Pointer to net device structure 3940 * Description: this function is called when a packet transmission fails to 3941 * complete within a reasonable time. The driver will mark the error in the 3942 * netdev structure and arrange for the device to be reset to a sane state 3943 * in order to transmit a new packet. 3944 */ 3945 static void stmmac_tx_timeout(struct net_device *dev, unsigned int txqueue) 3946 { 3947 struct stmmac_priv *priv = netdev_priv(dev); 3948 3949 stmmac_global_err(priv); 3950 } 3951 3952 /** 3953 * stmmac_set_rx_mode - entry point for multicast addressing 3954 * @dev : pointer to the device structure 3955 * Description: 3956 * This function is a driver entry point which gets called by the kernel 3957 * whenever multicast addresses must be enabled/disabled. 3958 * Return value: 3959 * void. 3960 */ 3961 static void stmmac_set_rx_mode(struct net_device *dev) 3962 { 3963 struct stmmac_priv *priv = netdev_priv(dev); 3964 3965 stmmac_set_filter(priv, priv->hw, dev); 3966 } 3967 3968 /** 3969 * stmmac_change_mtu - entry point to change MTU size for the device. 3970 * @dev : device pointer. 3971 * @new_mtu : the new MTU size for the device. 3972 * Description: the Maximum Transfer Unit (MTU) is used by the network layer 3973 * to drive packet transmission. Ethernet has an MTU of 1500 octets 3974 * (ETH_DATA_LEN). This value can be changed with ifconfig. 3975 * Return value: 3976 * 0 on success and an appropriate (-)ve integer as defined in errno.h 3977 * file on failure. 3978 */ 3979 static int stmmac_change_mtu(struct net_device *dev, int new_mtu) 3980 { 3981 struct stmmac_priv *priv = netdev_priv(dev); 3982 int txfifosz = priv->plat->tx_fifo_size; 3983 3984 if (txfifosz == 0) 3985 txfifosz = priv->dma_cap.tx_fifo_size; 3986 3987 txfifosz /= priv->plat->tx_queues_to_use; 3988 3989 if (netif_running(dev)) { 3990 netdev_err(priv->dev, "must be stopped to change its MTU\n"); 3991 return -EBUSY; 3992 } 3993 3994 new_mtu = STMMAC_ALIGN(new_mtu); 3995 3996 /* If condition true, FIFO is too small or MTU too large */ 3997 if ((txfifosz < new_mtu) || (new_mtu > BUF_SIZE_16KiB)) 3998 return -EINVAL; 3999 4000 dev->mtu = new_mtu; 4001 4002 netdev_update_features(dev); 4003 4004 return 0; 4005 } 4006 4007 static netdev_features_t stmmac_fix_features(struct net_device *dev, 4008 netdev_features_t features) 4009 { 4010 struct stmmac_priv *priv = netdev_priv(dev); 4011 4012 if (priv->plat->rx_coe == STMMAC_RX_COE_NONE) 4013 features &= ~NETIF_F_RXCSUM; 4014 4015 if (!priv->plat->tx_coe) 4016 features &= ~NETIF_F_CSUM_MASK; 4017 4018 /* Some GMAC devices have a bugged Jumbo frame support that 4019 * needs to have the Tx COE disabled for oversized frames 4020 * (due to limited buffer sizes). In this case we disable 4021 * the TX csum insertion in the TDES and not use SF. 4022 */ 4023 if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN)) 4024 features &= ~NETIF_F_CSUM_MASK; 4025 4026 /* Disable tso if asked by ethtool */ 4027 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) { 4028 if (features & NETIF_F_TSO) 4029 priv->tso = true; 4030 else 4031 priv->tso = false; 4032 } 4033 4034 return features; 4035 } 4036 4037 static int stmmac_set_features(struct net_device *netdev, 4038 netdev_features_t features) 4039 { 4040 struct stmmac_priv *priv = netdev_priv(netdev); 4041 bool sph_en; 4042 u32 chan; 4043 4044 /* Keep the COE Type in case of csum is supporting */ 4045 if (features & NETIF_F_RXCSUM) 4046 priv->hw->rx_csum = priv->plat->rx_coe; 4047 else 4048 priv->hw->rx_csum = 0; 4049 /* No check needed because rx_coe has been set before and it will be 4050 * fixed in case of issue. 4051 */ 4052 stmmac_rx_ipc(priv, priv->hw); 4053 4054 sph_en = (priv->hw->rx_csum > 0) && priv->sph; 4055 for (chan = 0; chan < priv->plat->rx_queues_to_use; chan++) 4056 stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan); 4057 4058 return 0; 4059 } 4060 4061 /** 4062 * stmmac_interrupt - main ISR 4063 * @irq: interrupt number. 4064 * @dev_id: to pass the net device pointer (must be valid). 4065 * Description: this is the main driver interrupt service routine. 4066 * It can call: 4067 * o DMA service routine (to manage incoming frame reception and transmission 4068 * status) 4069 * o Core interrupts to manage: remote wake-up, management counter, LPI 4070 * interrupts. 4071 */ 4072 static irqreturn_t stmmac_interrupt(int irq, void *dev_id) 4073 { 4074 struct net_device *dev = (struct net_device *)dev_id; 4075 struct stmmac_priv *priv = netdev_priv(dev); 4076 u32 rx_cnt = priv->plat->rx_queues_to_use; 4077 u32 tx_cnt = priv->plat->tx_queues_to_use; 4078 u32 queues_count; 4079 u32 queue; 4080 bool xmac; 4081 4082 xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 4083 queues_count = (rx_cnt > tx_cnt) ? rx_cnt : tx_cnt; 4084 4085 if (priv->irq_wake) 4086 pm_wakeup_event(priv->device, 0); 4087 4088 /* Check if adapter is up */ 4089 if (test_bit(STMMAC_DOWN, &priv->state)) 4090 return IRQ_HANDLED; 4091 /* Check if a fatal error happened */ 4092 if (stmmac_safety_feat_interrupt(priv)) 4093 return IRQ_HANDLED; 4094 4095 /* To handle GMAC own interrupts */ 4096 if ((priv->plat->has_gmac) || xmac) { 4097 int status = stmmac_host_irq_status(priv, priv->hw, &priv->xstats); 4098 int mtl_status; 4099 4100 if (unlikely(status)) { 4101 /* For LPI we need to save the tx status */ 4102 if (status & CORE_IRQ_TX_PATH_IN_LPI_MODE) 4103 priv->tx_path_in_lpi_mode = true; 4104 if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE) 4105 priv->tx_path_in_lpi_mode = false; 4106 } 4107 4108 for (queue = 0; queue < queues_count; queue++) { 4109 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 4110 4111 mtl_status = stmmac_host_mtl_irq_status(priv, priv->hw, 4112 queue); 4113 if (mtl_status != -EINVAL) 4114 status |= mtl_status; 4115 4116 if (status & CORE_IRQ_MTL_RX_OVERFLOW) 4117 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, 4118 rx_q->rx_tail_addr, 4119 queue); 4120 } 4121 4122 /* PCS link status */ 4123 if (priv->hw->pcs) { 4124 if (priv->xstats.pcs_link) 4125 netif_carrier_on(dev); 4126 else 4127 netif_carrier_off(dev); 4128 } 4129 } 4130 4131 /* To handle DMA interrupts */ 4132 stmmac_dma_interrupt(priv); 4133 4134 return IRQ_HANDLED; 4135 } 4136 4137 #ifdef CONFIG_NET_POLL_CONTROLLER 4138 /* Polling receive - used by NETCONSOLE and other diagnostic tools 4139 * to allow network I/O with interrupts disabled. 4140 */ 4141 static void stmmac_poll_controller(struct net_device *dev) 4142 { 4143 disable_irq(dev->irq); 4144 stmmac_interrupt(dev->irq, dev); 4145 enable_irq(dev->irq); 4146 } 4147 #endif 4148 4149 /** 4150 * stmmac_ioctl - Entry point for the Ioctl 4151 * @dev: Device pointer. 4152 * @rq: An IOCTL specefic structure, that can contain a pointer to 4153 * a proprietary structure used to pass information to the driver. 4154 * @cmd: IOCTL command 4155 * Description: 4156 * Currently it supports the phy_mii_ioctl(...) and HW time stamping. 4157 */ 4158 static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 4159 { 4160 struct stmmac_priv *priv = netdev_priv (dev); 4161 int ret = -EOPNOTSUPP; 4162 4163 if (!netif_running(dev)) 4164 return -EINVAL; 4165 4166 switch (cmd) { 4167 case SIOCGMIIPHY: 4168 case SIOCGMIIREG: 4169 case SIOCSMIIREG: 4170 ret = phylink_mii_ioctl(priv->phylink, rq, cmd); 4171 break; 4172 case SIOCSHWTSTAMP: 4173 ret = stmmac_hwtstamp_set(dev, rq); 4174 break; 4175 case SIOCGHWTSTAMP: 4176 ret = stmmac_hwtstamp_get(dev, rq); 4177 break; 4178 default: 4179 break; 4180 } 4181 4182 return ret; 4183 } 4184 4185 static int stmmac_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 4186 void *cb_priv) 4187 { 4188 struct stmmac_priv *priv = cb_priv; 4189 int ret = -EOPNOTSUPP; 4190 4191 if (!tc_cls_can_offload_and_chain0(priv->dev, type_data)) 4192 return ret; 4193 4194 stmmac_disable_all_queues(priv); 4195 4196 switch (type) { 4197 case TC_SETUP_CLSU32: 4198 ret = stmmac_tc_setup_cls_u32(priv, priv, type_data); 4199 break; 4200 case TC_SETUP_CLSFLOWER: 4201 ret = stmmac_tc_setup_cls(priv, priv, type_data); 4202 break; 4203 default: 4204 break; 4205 } 4206 4207 stmmac_enable_all_queues(priv); 4208 return ret; 4209 } 4210 4211 static LIST_HEAD(stmmac_block_cb_list); 4212 4213 static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type, 4214 void *type_data) 4215 { 4216 struct stmmac_priv *priv = netdev_priv(ndev); 4217 4218 switch (type) { 4219 case TC_SETUP_BLOCK: 4220 return flow_block_cb_setup_simple(type_data, 4221 &stmmac_block_cb_list, 4222 stmmac_setup_tc_block_cb, 4223 priv, priv, true); 4224 case TC_SETUP_QDISC_CBS: 4225 return stmmac_tc_setup_cbs(priv, priv, type_data); 4226 case TC_SETUP_QDISC_TAPRIO: 4227 return stmmac_tc_setup_taprio(priv, priv, type_data); 4228 case TC_SETUP_QDISC_ETF: 4229 return stmmac_tc_setup_etf(priv, priv, type_data); 4230 default: 4231 return -EOPNOTSUPP; 4232 } 4233 } 4234 4235 static u16 stmmac_select_queue(struct net_device *dev, struct sk_buff *skb, 4236 struct net_device *sb_dev) 4237 { 4238 int gso = skb_shinfo(skb)->gso_type; 4239 4240 if (gso & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6 | SKB_GSO_UDP_L4)) { 4241 /* 4242 * There is no way to determine the number of TSO/USO 4243 * capable Queues. Let's use always the Queue 0 4244 * because if TSO/USO is supported then at least this 4245 * one will be capable. 4246 */ 4247 return 0; 4248 } 4249 4250 return netdev_pick_tx(dev, skb, NULL) % dev->real_num_tx_queues; 4251 } 4252 4253 static int stmmac_set_mac_address(struct net_device *ndev, void *addr) 4254 { 4255 struct stmmac_priv *priv = netdev_priv(ndev); 4256 int ret = 0; 4257 4258 ret = eth_mac_addr(ndev, addr); 4259 if (ret) 4260 return ret; 4261 4262 stmmac_set_umac_addr(priv, priv->hw, ndev->dev_addr, 0); 4263 4264 return ret; 4265 } 4266 4267 #ifdef CONFIG_DEBUG_FS 4268 static struct dentry *stmmac_fs_dir; 4269 4270 static void sysfs_display_ring(void *head, int size, int extend_desc, 4271 struct seq_file *seq) 4272 { 4273 int i; 4274 struct dma_extended_desc *ep = (struct dma_extended_desc *)head; 4275 struct dma_desc *p = (struct dma_desc *)head; 4276 4277 for (i = 0; i < size; i++) { 4278 if (extend_desc) { 4279 seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n", 4280 i, (unsigned int)virt_to_phys(ep), 4281 le32_to_cpu(ep->basic.des0), 4282 le32_to_cpu(ep->basic.des1), 4283 le32_to_cpu(ep->basic.des2), 4284 le32_to_cpu(ep->basic.des3)); 4285 ep++; 4286 } else { 4287 seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n", 4288 i, (unsigned int)virt_to_phys(p), 4289 le32_to_cpu(p->des0), le32_to_cpu(p->des1), 4290 le32_to_cpu(p->des2), le32_to_cpu(p->des3)); 4291 p++; 4292 } 4293 seq_printf(seq, "\n"); 4294 } 4295 } 4296 4297 static int stmmac_rings_status_show(struct seq_file *seq, void *v) 4298 { 4299 struct net_device *dev = seq->private; 4300 struct stmmac_priv *priv = netdev_priv(dev); 4301 u32 rx_count = priv->plat->rx_queues_to_use; 4302 u32 tx_count = priv->plat->tx_queues_to_use; 4303 u32 queue; 4304 4305 if ((dev->flags & IFF_UP) == 0) 4306 return 0; 4307 4308 for (queue = 0; queue < rx_count; queue++) { 4309 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 4310 4311 seq_printf(seq, "RX Queue %d:\n", queue); 4312 4313 if (priv->extend_desc) { 4314 seq_printf(seq, "Extended descriptor ring:\n"); 4315 sysfs_display_ring((void *)rx_q->dma_erx, 4316 DMA_RX_SIZE, 1, seq); 4317 } else { 4318 seq_printf(seq, "Descriptor ring:\n"); 4319 sysfs_display_ring((void *)rx_q->dma_rx, 4320 DMA_RX_SIZE, 0, seq); 4321 } 4322 } 4323 4324 for (queue = 0; queue < tx_count; queue++) { 4325 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 4326 4327 seq_printf(seq, "TX Queue %d:\n", queue); 4328 4329 if (priv->extend_desc) { 4330 seq_printf(seq, "Extended descriptor ring:\n"); 4331 sysfs_display_ring((void *)tx_q->dma_etx, 4332 DMA_TX_SIZE, 1, seq); 4333 } else if (!(tx_q->tbs & STMMAC_TBS_AVAIL)) { 4334 seq_printf(seq, "Descriptor ring:\n"); 4335 sysfs_display_ring((void *)tx_q->dma_tx, 4336 DMA_TX_SIZE, 0, seq); 4337 } 4338 } 4339 4340 return 0; 4341 } 4342 DEFINE_SHOW_ATTRIBUTE(stmmac_rings_status); 4343 4344 static int stmmac_dma_cap_show(struct seq_file *seq, void *v) 4345 { 4346 struct net_device *dev = seq->private; 4347 struct stmmac_priv *priv = netdev_priv(dev); 4348 4349 if (!priv->hw_cap_support) { 4350 seq_printf(seq, "DMA HW features not supported\n"); 4351 return 0; 4352 } 4353 4354 seq_printf(seq, "==============================\n"); 4355 seq_printf(seq, "\tDMA HW features\n"); 4356 seq_printf(seq, "==============================\n"); 4357 4358 seq_printf(seq, "\t10/100 Mbps: %s\n", 4359 (priv->dma_cap.mbps_10_100) ? "Y" : "N"); 4360 seq_printf(seq, "\t1000 Mbps: %s\n", 4361 (priv->dma_cap.mbps_1000) ? "Y" : "N"); 4362 seq_printf(seq, "\tHalf duplex: %s\n", 4363 (priv->dma_cap.half_duplex) ? "Y" : "N"); 4364 seq_printf(seq, "\tHash Filter: %s\n", 4365 (priv->dma_cap.hash_filter) ? "Y" : "N"); 4366 seq_printf(seq, "\tMultiple MAC address registers: %s\n", 4367 (priv->dma_cap.multi_addr) ? "Y" : "N"); 4368 seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfaces): %s\n", 4369 (priv->dma_cap.pcs) ? "Y" : "N"); 4370 seq_printf(seq, "\tSMA (MDIO) Interface: %s\n", 4371 (priv->dma_cap.sma_mdio) ? "Y" : "N"); 4372 seq_printf(seq, "\tPMT Remote wake up: %s\n", 4373 (priv->dma_cap.pmt_remote_wake_up) ? "Y" : "N"); 4374 seq_printf(seq, "\tPMT Magic Frame: %s\n", 4375 (priv->dma_cap.pmt_magic_frame) ? "Y" : "N"); 4376 seq_printf(seq, "\tRMON module: %s\n", 4377 (priv->dma_cap.rmon) ? "Y" : "N"); 4378 seq_printf(seq, "\tIEEE 1588-2002 Time Stamp: %s\n", 4379 (priv->dma_cap.time_stamp) ? "Y" : "N"); 4380 seq_printf(seq, "\tIEEE 1588-2008 Advanced Time Stamp: %s\n", 4381 (priv->dma_cap.atime_stamp) ? "Y" : "N"); 4382 seq_printf(seq, "\t802.3az - Energy-Efficient Ethernet (EEE): %s\n", 4383 (priv->dma_cap.eee) ? "Y" : "N"); 4384 seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N"); 4385 seq_printf(seq, "\tChecksum Offload in TX: %s\n", 4386 (priv->dma_cap.tx_coe) ? "Y" : "N"); 4387 if (priv->synopsys_id >= DWMAC_CORE_4_00) { 4388 seq_printf(seq, "\tIP Checksum Offload in RX: %s\n", 4389 (priv->dma_cap.rx_coe) ? "Y" : "N"); 4390 } else { 4391 seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n", 4392 (priv->dma_cap.rx_coe_type1) ? "Y" : "N"); 4393 seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n", 4394 (priv->dma_cap.rx_coe_type2) ? "Y" : "N"); 4395 } 4396 seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n", 4397 (priv->dma_cap.rxfifo_over_2048) ? "Y" : "N"); 4398 seq_printf(seq, "\tNumber of Additional RX channel: %d\n", 4399 priv->dma_cap.number_rx_channel); 4400 seq_printf(seq, "\tNumber of Additional TX channel: %d\n", 4401 priv->dma_cap.number_tx_channel); 4402 seq_printf(seq, "\tNumber of Additional RX queues: %d\n", 4403 priv->dma_cap.number_rx_queues); 4404 seq_printf(seq, "\tNumber of Additional TX queues: %d\n", 4405 priv->dma_cap.number_tx_queues); 4406 seq_printf(seq, "\tEnhanced descriptors: %s\n", 4407 (priv->dma_cap.enh_desc) ? "Y" : "N"); 4408 seq_printf(seq, "\tTX Fifo Size: %d\n", priv->dma_cap.tx_fifo_size); 4409 seq_printf(seq, "\tRX Fifo Size: %d\n", priv->dma_cap.rx_fifo_size); 4410 seq_printf(seq, "\tHash Table Size: %d\n", priv->dma_cap.hash_tb_sz); 4411 seq_printf(seq, "\tTSO: %s\n", priv->dma_cap.tsoen ? "Y" : "N"); 4412 seq_printf(seq, "\tNumber of PPS Outputs: %d\n", 4413 priv->dma_cap.pps_out_num); 4414 seq_printf(seq, "\tSafety Features: %s\n", 4415 priv->dma_cap.asp ? "Y" : "N"); 4416 seq_printf(seq, "\tFlexible RX Parser: %s\n", 4417 priv->dma_cap.frpsel ? "Y" : "N"); 4418 seq_printf(seq, "\tEnhanced Addressing: %d\n", 4419 priv->dma_cap.addr64); 4420 seq_printf(seq, "\tReceive Side Scaling: %s\n", 4421 priv->dma_cap.rssen ? "Y" : "N"); 4422 seq_printf(seq, "\tVLAN Hash Filtering: %s\n", 4423 priv->dma_cap.vlhash ? "Y" : "N"); 4424 seq_printf(seq, "\tSplit Header: %s\n", 4425 priv->dma_cap.sphen ? "Y" : "N"); 4426 seq_printf(seq, "\tVLAN TX Insertion: %s\n", 4427 priv->dma_cap.vlins ? "Y" : "N"); 4428 seq_printf(seq, "\tDouble VLAN: %s\n", 4429 priv->dma_cap.dvlan ? "Y" : "N"); 4430 seq_printf(seq, "\tNumber of L3/L4 Filters: %d\n", 4431 priv->dma_cap.l3l4fnum); 4432 seq_printf(seq, "\tARP Offloading: %s\n", 4433 priv->dma_cap.arpoffsel ? "Y" : "N"); 4434 seq_printf(seq, "\tEnhancements to Scheduled Traffic (EST): %s\n", 4435 priv->dma_cap.estsel ? "Y" : "N"); 4436 seq_printf(seq, "\tFrame Preemption (FPE): %s\n", 4437 priv->dma_cap.fpesel ? "Y" : "N"); 4438 seq_printf(seq, "\tTime-Based Scheduling (TBS): %s\n", 4439 priv->dma_cap.tbssel ? "Y" : "N"); 4440 return 0; 4441 } 4442 DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap); 4443 4444 /* Use network device events to rename debugfs file entries. 4445 */ 4446 static int stmmac_device_event(struct notifier_block *unused, 4447 unsigned long event, void *ptr) 4448 { 4449 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4450 struct stmmac_priv *priv = netdev_priv(dev); 4451 4452 if (dev->netdev_ops != &stmmac_netdev_ops) 4453 goto done; 4454 4455 switch (event) { 4456 case NETDEV_CHANGENAME: 4457 if (priv->dbgfs_dir) 4458 priv->dbgfs_dir = debugfs_rename(stmmac_fs_dir, 4459 priv->dbgfs_dir, 4460 stmmac_fs_dir, 4461 dev->name); 4462 break; 4463 } 4464 done: 4465 return NOTIFY_DONE; 4466 } 4467 4468 static struct notifier_block stmmac_notifier = { 4469 .notifier_call = stmmac_device_event, 4470 }; 4471 4472 static void stmmac_init_fs(struct net_device *dev) 4473 { 4474 struct stmmac_priv *priv = netdev_priv(dev); 4475 4476 rtnl_lock(); 4477 4478 /* Create per netdev entries */ 4479 priv->dbgfs_dir = debugfs_create_dir(dev->name, stmmac_fs_dir); 4480 4481 /* Entry to report DMA RX/TX rings */ 4482 debugfs_create_file("descriptors_status", 0444, priv->dbgfs_dir, dev, 4483 &stmmac_rings_status_fops); 4484 4485 /* Entry to report the DMA HW features */ 4486 debugfs_create_file("dma_cap", 0444, priv->dbgfs_dir, dev, 4487 &stmmac_dma_cap_fops); 4488 4489 rtnl_unlock(); 4490 } 4491 4492 static void stmmac_exit_fs(struct net_device *dev) 4493 { 4494 struct stmmac_priv *priv = netdev_priv(dev); 4495 4496 debugfs_remove_recursive(priv->dbgfs_dir); 4497 } 4498 #endif /* CONFIG_DEBUG_FS */ 4499 4500 static u32 stmmac_vid_crc32_le(__le16 vid_le) 4501 { 4502 unsigned char *data = (unsigned char *)&vid_le; 4503 unsigned char data_byte = 0; 4504 u32 crc = ~0x0; 4505 u32 temp = 0; 4506 int i, bits; 4507 4508 bits = get_bitmask_order(VLAN_VID_MASK); 4509 for (i = 0; i < bits; i++) { 4510 if ((i % 8) == 0) 4511 data_byte = data[i / 8]; 4512 4513 temp = ((crc & 1) ^ data_byte) & 1; 4514 crc >>= 1; 4515 data_byte >>= 1; 4516 4517 if (temp) 4518 crc ^= 0xedb88320; 4519 } 4520 4521 return crc; 4522 } 4523 4524 static int stmmac_vlan_update(struct stmmac_priv *priv, bool is_double) 4525 { 4526 u32 crc, hash = 0; 4527 __le16 pmatch = 0; 4528 int count = 0; 4529 u16 vid = 0; 4530 4531 for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) { 4532 __le16 vid_le = cpu_to_le16(vid); 4533 crc = bitrev32(~stmmac_vid_crc32_le(vid_le)) >> 28; 4534 hash |= (1 << crc); 4535 count++; 4536 } 4537 4538 if (!priv->dma_cap.vlhash) { 4539 if (count > 2) /* VID = 0 always passes filter */ 4540 return -EOPNOTSUPP; 4541 4542 pmatch = cpu_to_le16(vid); 4543 hash = 0; 4544 } 4545 4546 return stmmac_update_vlan_hash(priv, priv->hw, hash, pmatch, is_double); 4547 } 4548 4549 static int stmmac_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) 4550 { 4551 struct stmmac_priv *priv = netdev_priv(ndev); 4552 bool is_double = false; 4553 int ret; 4554 4555 if (be16_to_cpu(proto) == ETH_P_8021AD) 4556 is_double = true; 4557 4558 set_bit(vid, priv->active_vlans); 4559 ret = stmmac_vlan_update(priv, is_double); 4560 if (ret) { 4561 clear_bit(vid, priv->active_vlans); 4562 return ret; 4563 } 4564 4565 if (priv->hw->num_vlan) { 4566 ret = stmmac_add_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid); 4567 if (ret) 4568 return ret; 4569 } 4570 4571 return 0; 4572 } 4573 4574 static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) 4575 { 4576 struct stmmac_priv *priv = netdev_priv(ndev); 4577 bool is_double = false; 4578 int ret; 4579 4580 if (be16_to_cpu(proto) == ETH_P_8021AD) 4581 is_double = true; 4582 4583 clear_bit(vid, priv->active_vlans); 4584 4585 if (priv->hw->num_vlan) { 4586 ret = stmmac_del_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid); 4587 if (ret) 4588 return ret; 4589 } 4590 4591 return stmmac_vlan_update(priv, is_double); 4592 } 4593 4594 static const struct net_device_ops stmmac_netdev_ops = { 4595 .ndo_open = stmmac_open, 4596 .ndo_start_xmit = stmmac_xmit, 4597 .ndo_stop = stmmac_release, 4598 .ndo_change_mtu = stmmac_change_mtu, 4599 .ndo_fix_features = stmmac_fix_features, 4600 .ndo_set_features = stmmac_set_features, 4601 .ndo_set_rx_mode = stmmac_set_rx_mode, 4602 .ndo_tx_timeout = stmmac_tx_timeout, 4603 .ndo_do_ioctl = stmmac_ioctl, 4604 .ndo_setup_tc = stmmac_setup_tc, 4605 .ndo_select_queue = stmmac_select_queue, 4606 #ifdef CONFIG_NET_POLL_CONTROLLER 4607 .ndo_poll_controller = stmmac_poll_controller, 4608 #endif 4609 .ndo_set_mac_address = stmmac_set_mac_address, 4610 .ndo_vlan_rx_add_vid = stmmac_vlan_rx_add_vid, 4611 .ndo_vlan_rx_kill_vid = stmmac_vlan_rx_kill_vid, 4612 }; 4613 4614 static void stmmac_reset_subtask(struct stmmac_priv *priv) 4615 { 4616 if (!test_and_clear_bit(STMMAC_RESET_REQUESTED, &priv->state)) 4617 return; 4618 if (test_bit(STMMAC_DOWN, &priv->state)) 4619 return; 4620 4621 netdev_err(priv->dev, "Reset adapter.\n"); 4622 4623 rtnl_lock(); 4624 netif_trans_update(priv->dev); 4625 while (test_and_set_bit(STMMAC_RESETING, &priv->state)) 4626 usleep_range(1000, 2000); 4627 4628 set_bit(STMMAC_DOWN, &priv->state); 4629 dev_close(priv->dev); 4630 dev_open(priv->dev, NULL); 4631 clear_bit(STMMAC_DOWN, &priv->state); 4632 clear_bit(STMMAC_RESETING, &priv->state); 4633 rtnl_unlock(); 4634 } 4635 4636 static void stmmac_service_task(struct work_struct *work) 4637 { 4638 struct stmmac_priv *priv = container_of(work, struct stmmac_priv, 4639 service_task); 4640 4641 stmmac_reset_subtask(priv); 4642 clear_bit(STMMAC_SERVICE_SCHED, &priv->state); 4643 } 4644 4645 /** 4646 * stmmac_hw_init - Init the MAC device 4647 * @priv: driver private structure 4648 * Description: this function is to configure the MAC device according to 4649 * some platform parameters or the HW capability register. It prepares the 4650 * driver to use either ring or chain modes and to setup either enhanced or 4651 * normal descriptors. 4652 */ 4653 static int stmmac_hw_init(struct stmmac_priv *priv) 4654 { 4655 int ret; 4656 4657 /* dwmac-sun8i only work in chain mode */ 4658 if (priv->plat->has_sun8i) 4659 chain_mode = 1; 4660 priv->chain_mode = chain_mode; 4661 4662 /* Initialize HW Interface */ 4663 ret = stmmac_hwif_init(priv); 4664 if (ret) 4665 return ret; 4666 4667 /* Get the HW capability (new GMAC newer than 3.50a) */ 4668 priv->hw_cap_support = stmmac_get_hw_features(priv); 4669 if (priv->hw_cap_support) { 4670 dev_info(priv->device, "DMA HW capability register supported\n"); 4671 4672 /* We can override some gmac/dma configuration fields: e.g. 4673 * enh_desc, tx_coe (e.g. that are passed through the 4674 * platform) with the values from the HW capability 4675 * register (if supported). 4676 */ 4677 priv->plat->enh_desc = priv->dma_cap.enh_desc; 4678 priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up; 4679 priv->hw->pmt = priv->plat->pmt; 4680 if (priv->dma_cap.hash_tb_sz) { 4681 priv->hw->multicast_filter_bins = 4682 (BIT(priv->dma_cap.hash_tb_sz) << 5); 4683 priv->hw->mcast_bits_log2 = 4684 ilog2(priv->hw->multicast_filter_bins); 4685 } 4686 4687 /* TXCOE doesn't work in thresh DMA mode */ 4688 if (priv->plat->force_thresh_dma_mode) 4689 priv->plat->tx_coe = 0; 4690 else 4691 priv->plat->tx_coe = priv->dma_cap.tx_coe; 4692 4693 /* In case of GMAC4 rx_coe is from HW cap register. */ 4694 priv->plat->rx_coe = priv->dma_cap.rx_coe; 4695 4696 if (priv->dma_cap.rx_coe_type2) 4697 priv->plat->rx_coe = STMMAC_RX_COE_TYPE2; 4698 else if (priv->dma_cap.rx_coe_type1) 4699 priv->plat->rx_coe = STMMAC_RX_COE_TYPE1; 4700 4701 } else { 4702 dev_info(priv->device, "No HW DMA feature register supported\n"); 4703 } 4704 4705 if (priv->plat->rx_coe) { 4706 priv->hw->rx_csum = priv->plat->rx_coe; 4707 dev_info(priv->device, "RX Checksum Offload Engine supported\n"); 4708 if (priv->synopsys_id < DWMAC_CORE_4_00) 4709 dev_info(priv->device, "COE Type %d\n", priv->hw->rx_csum); 4710 } 4711 if (priv->plat->tx_coe) 4712 dev_info(priv->device, "TX Checksum insertion supported\n"); 4713 4714 if (priv->plat->pmt) { 4715 dev_info(priv->device, "Wake-Up On Lan supported\n"); 4716 device_set_wakeup_capable(priv->device, 1); 4717 } 4718 4719 if (priv->dma_cap.tsoen) 4720 dev_info(priv->device, "TSO supported\n"); 4721 4722 /* Run HW quirks, if any */ 4723 if (priv->hwif_quirks) { 4724 ret = priv->hwif_quirks(priv); 4725 if (ret) 4726 return ret; 4727 } 4728 4729 /* Rx Watchdog is available in the COREs newer than the 3.40. 4730 * In some case, for example on bugged HW this feature 4731 * has to be disable and this can be done by passing the 4732 * riwt_off field from the platform. 4733 */ 4734 if (((priv->synopsys_id >= DWMAC_CORE_3_50) || 4735 (priv->plat->has_xgmac)) && (!priv->plat->riwt_off)) { 4736 priv->use_riwt = 1; 4737 dev_info(priv->device, 4738 "Enable RX Mitigation via HW Watchdog Timer\n"); 4739 } 4740 4741 return 0; 4742 } 4743 4744 /** 4745 * stmmac_dvr_probe 4746 * @device: device pointer 4747 * @plat_dat: platform data pointer 4748 * @res: stmmac resource pointer 4749 * Description: this is the main probe function used to 4750 * call the alloc_etherdev, allocate the priv structure. 4751 * Return: 4752 * returns 0 on success, otherwise errno. 4753 */ 4754 int stmmac_dvr_probe(struct device *device, 4755 struct plat_stmmacenet_data *plat_dat, 4756 struct stmmac_resources *res) 4757 { 4758 struct net_device *ndev = NULL; 4759 struct stmmac_priv *priv; 4760 u32 queue, rxq, maxq; 4761 int i, ret = 0; 4762 4763 ndev = devm_alloc_etherdev_mqs(device, sizeof(struct stmmac_priv), 4764 MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES); 4765 if (!ndev) 4766 return -ENOMEM; 4767 4768 SET_NETDEV_DEV(ndev, device); 4769 4770 priv = netdev_priv(ndev); 4771 priv->device = device; 4772 priv->dev = ndev; 4773 4774 stmmac_set_ethtool_ops(ndev); 4775 priv->pause = pause; 4776 priv->plat = plat_dat; 4777 priv->ioaddr = res->addr; 4778 priv->dev->base_addr = (unsigned long)res->addr; 4779 4780 priv->dev->irq = res->irq; 4781 priv->wol_irq = res->wol_irq; 4782 priv->lpi_irq = res->lpi_irq; 4783 4784 if (!IS_ERR_OR_NULL(res->mac)) 4785 memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN); 4786 4787 dev_set_drvdata(device, priv->dev); 4788 4789 /* Verify driver arguments */ 4790 stmmac_verify_args(); 4791 4792 /* Allocate workqueue */ 4793 priv->wq = create_singlethread_workqueue("stmmac_wq"); 4794 if (!priv->wq) { 4795 dev_err(priv->device, "failed to create workqueue\n"); 4796 return -ENOMEM; 4797 } 4798 4799 INIT_WORK(&priv->service_task, stmmac_service_task); 4800 4801 /* Override with kernel parameters if supplied XXX CRS XXX 4802 * this needs to have multiple instances 4803 */ 4804 if ((phyaddr >= 0) && (phyaddr <= 31)) 4805 priv->plat->phy_addr = phyaddr; 4806 4807 if (priv->plat->stmmac_rst) { 4808 ret = reset_control_assert(priv->plat->stmmac_rst); 4809 reset_control_deassert(priv->plat->stmmac_rst); 4810 /* Some reset controllers have only reset callback instead of 4811 * assert + deassert callbacks pair. 4812 */ 4813 if (ret == -ENOTSUPP) 4814 reset_control_reset(priv->plat->stmmac_rst); 4815 } 4816 4817 /* Init MAC and get the capabilities */ 4818 ret = stmmac_hw_init(priv); 4819 if (ret) 4820 goto error_hw_init; 4821 4822 stmmac_check_ether_addr(priv); 4823 4824 /* Configure real RX and TX queues */ 4825 netif_set_real_num_rx_queues(ndev, priv->plat->rx_queues_to_use); 4826 netif_set_real_num_tx_queues(ndev, priv->plat->tx_queues_to_use); 4827 4828 ndev->netdev_ops = &stmmac_netdev_ops; 4829 4830 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 4831 NETIF_F_RXCSUM; 4832 4833 ret = stmmac_tc_init(priv, priv); 4834 if (!ret) { 4835 ndev->hw_features |= NETIF_F_HW_TC; 4836 } 4837 4838 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) { 4839 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 4840 if (priv->plat->has_gmac4) 4841 ndev->hw_features |= NETIF_F_GSO_UDP_L4; 4842 priv->tso = true; 4843 dev_info(priv->device, "TSO feature enabled\n"); 4844 } 4845 4846 if (priv->dma_cap.sphen) { 4847 ndev->hw_features |= NETIF_F_GRO; 4848 priv->sph = true; 4849 dev_info(priv->device, "SPH feature enabled\n"); 4850 } 4851 4852 if (priv->dma_cap.addr64) { 4853 ret = dma_set_mask_and_coherent(device, 4854 DMA_BIT_MASK(priv->dma_cap.addr64)); 4855 if (!ret) { 4856 dev_info(priv->device, "Using %d bits DMA width\n", 4857 priv->dma_cap.addr64); 4858 4859 /* 4860 * If more than 32 bits can be addressed, make sure to 4861 * enable enhanced addressing mode. 4862 */ 4863 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) 4864 priv->plat->dma_cfg->eame = true; 4865 } else { 4866 ret = dma_set_mask_and_coherent(device, DMA_BIT_MASK(32)); 4867 if (ret) { 4868 dev_err(priv->device, "Failed to set DMA Mask\n"); 4869 goto error_hw_init; 4870 } 4871 4872 priv->dma_cap.addr64 = 32; 4873 } 4874 } 4875 4876 ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; 4877 ndev->watchdog_timeo = msecs_to_jiffies(watchdog); 4878 #ifdef STMMAC_VLAN_TAG_USED 4879 /* Both mac100 and gmac support receive VLAN tag detection */ 4880 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX; 4881 if (priv->dma_cap.vlhash) { 4882 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 4883 ndev->features |= NETIF_F_HW_VLAN_STAG_FILTER; 4884 } 4885 if (priv->dma_cap.vlins) { 4886 ndev->features |= NETIF_F_HW_VLAN_CTAG_TX; 4887 if (priv->dma_cap.dvlan) 4888 ndev->features |= NETIF_F_HW_VLAN_STAG_TX; 4889 } 4890 #endif 4891 priv->msg_enable = netif_msg_init(debug, default_msg_level); 4892 4893 /* Initialize RSS */ 4894 rxq = priv->plat->rx_queues_to_use; 4895 netdev_rss_key_fill(priv->rss.key, sizeof(priv->rss.key)); 4896 for (i = 0; i < ARRAY_SIZE(priv->rss.table); i++) 4897 priv->rss.table[i] = ethtool_rxfh_indir_default(i, rxq); 4898 4899 if (priv->dma_cap.rssen && priv->plat->rss_en) 4900 ndev->features |= NETIF_F_RXHASH; 4901 4902 /* MTU range: 46 - hw-specific max */ 4903 ndev->min_mtu = ETH_ZLEN - ETH_HLEN; 4904 if (priv->plat->has_xgmac) 4905 ndev->max_mtu = XGMAC_JUMBO_LEN; 4906 else if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00)) 4907 ndev->max_mtu = JUMBO_LEN; 4908 else 4909 ndev->max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); 4910 /* Will not overwrite ndev->max_mtu if plat->maxmtu > ndev->max_mtu 4911 * as well as plat->maxmtu < ndev->min_mtu which is a invalid range. 4912 */ 4913 if ((priv->plat->maxmtu < ndev->max_mtu) && 4914 (priv->plat->maxmtu >= ndev->min_mtu)) 4915 ndev->max_mtu = priv->plat->maxmtu; 4916 else if (priv->plat->maxmtu < ndev->min_mtu) 4917 dev_warn(priv->device, 4918 "%s: warning: maxmtu having invalid value (%d)\n", 4919 __func__, priv->plat->maxmtu); 4920 4921 if (flow_ctrl) 4922 priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ 4923 4924 /* Setup channels NAPI */ 4925 maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use); 4926 4927 for (queue = 0; queue < maxq; queue++) { 4928 struct stmmac_channel *ch = &priv->channel[queue]; 4929 4930 spin_lock_init(&ch->lock); 4931 ch->priv_data = priv; 4932 ch->index = queue; 4933 4934 if (queue < priv->plat->rx_queues_to_use) { 4935 netif_napi_add(ndev, &ch->rx_napi, stmmac_napi_poll_rx, 4936 NAPI_POLL_WEIGHT); 4937 } 4938 if (queue < priv->plat->tx_queues_to_use) { 4939 netif_tx_napi_add(ndev, &ch->tx_napi, 4940 stmmac_napi_poll_tx, 4941 NAPI_POLL_WEIGHT); 4942 } 4943 } 4944 4945 mutex_init(&priv->lock); 4946 4947 /* If a specific clk_csr value is passed from the platform 4948 * this means that the CSR Clock Range selection cannot be 4949 * changed at run-time and it is fixed. Viceversa the driver'll try to 4950 * set the MDC clock dynamically according to the csr actual 4951 * clock input. 4952 */ 4953 if (priv->plat->clk_csr >= 0) 4954 priv->clk_csr = priv->plat->clk_csr; 4955 else 4956 stmmac_clk_csr_set(priv); 4957 4958 stmmac_check_pcs_mode(priv); 4959 4960 if (priv->hw->pcs != STMMAC_PCS_TBI && 4961 priv->hw->pcs != STMMAC_PCS_RTBI) { 4962 /* MDIO bus Registration */ 4963 ret = stmmac_mdio_register(ndev); 4964 if (ret < 0) { 4965 dev_err(priv->device, 4966 "%s: MDIO bus (id: %d) registration failed", 4967 __func__, priv->plat->bus_id); 4968 goto error_mdio_register; 4969 } 4970 } 4971 4972 ret = stmmac_phy_setup(priv); 4973 if (ret) { 4974 netdev_err(ndev, "failed to setup phy (%d)\n", ret); 4975 goto error_phy_setup; 4976 } 4977 4978 ret = register_netdev(ndev); 4979 if (ret) { 4980 dev_err(priv->device, "%s: ERROR %i registering the device\n", 4981 __func__, ret); 4982 goto error_netdev_register; 4983 } 4984 4985 if (priv->plat->serdes_powerup) { 4986 ret = priv->plat->serdes_powerup(ndev, 4987 priv->plat->bsp_priv); 4988 4989 if (ret < 0) 4990 goto error_serdes_powerup; 4991 } 4992 4993 #ifdef CONFIG_DEBUG_FS 4994 stmmac_init_fs(ndev); 4995 #endif 4996 4997 return ret; 4998 4999 error_serdes_powerup: 5000 unregister_netdev(ndev); 5001 error_netdev_register: 5002 phylink_destroy(priv->phylink); 5003 error_phy_setup: 5004 if (priv->hw->pcs != STMMAC_PCS_TBI && 5005 priv->hw->pcs != STMMAC_PCS_RTBI) 5006 stmmac_mdio_unregister(ndev); 5007 error_mdio_register: 5008 for (queue = 0; queue < maxq; queue++) { 5009 struct stmmac_channel *ch = &priv->channel[queue]; 5010 5011 if (queue < priv->plat->rx_queues_to_use) 5012 netif_napi_del(&ch->rx_napi); 5013 if (queue < priv->plat->tx_queues_to_use) 5014 netif_napi_del(&ch->tx_napi); 5015 } 5016 error_hw_init: 5017 destroy_workqueue(priv->wq); 5018 5019 return ret; 5020 } 5021 EXPORT_SYMBOL_GPL(stmmac_dvr_probe); 5022 5023 /** 5024 * stmmac_dvr_remove 5025 * @dev: device pointer 5026 * Description: this function resets the TX/RX processes, disables the MAC RX/TX 5027 * changes the link status, releases the DMA descriptor rings. 5028 */ 5029 int stmmac_dvr_remove(struct device *dev) 5030 { 5031 struct net_device *ndev = dev_get_drvdata(dev); 5032 struct stmmac_priv *priv = netdev_priv(ndev); 5033 5034 netdev_info(priv->dev, "%s: removing driver", __func__); 5035 5036 stmmac_stop_all_dma(priv); 5037 5038 if (priv->plat->serdes_powerdown) 5039 priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv); 5040 5041 stmmac_mac_set(priv, priv->ioaddr, false); 5042 netif_carrier_off(ndev); 5043 unregister_netdev(ndev); 5044 #ifdef CONFIG_DEBUG_FS 5045 stmmac_exit_fs(ndev); 5046 #endif 5047 phylink_destroy(priv->phylink); 5048 if (priv->plat->stmmac_rst) 5049 reset_control_assert(priv->plat->stmmac_rst); 5050 clk_disable_unprepare(priv->plat->pclk); 5051 clk_disable_unprepare(priv->plat->stmmac_clk); 5052 if (priv->hw->pcs != STMMAC_PCS_TBI && 5053 priv->hw->pcs != STMMAC_PCS_RTBI) 5054 stmmac_mdio_unregister(ndev); 5055 destroy_workqueue(priv->wq); 5056 mutex_destroy(&priv->lock); 5057 5058 return 0; 5059 } 5060 EXPORT_SYMBOL_GPL(stmmac_dvr_remove); 5061 5062 /** 5063 * stmmac_suspend - suspend callback 5064 * @dev: device pointer 5065 * Description: this is the function to suspend the device and it is called 5066 * by the platform driver to stop the network queue, release the resources, 5067 * program the PMT register (for WoL), clean and release driver resources. 5068 */ 5069 int stmmac_suspend(struct device *dev) 5070 { 5071 struct net_device *ndev = dev_get_drvdata(dev); 5072 struct stmmac_priv *priv = netdev_priv(ndev); 5073 u32 chan; 5074 5075 if (!ndev || !netif_running(ndev)) 5076 return 0; 5077 5078 phylink_mac_change(priv->phylink, false); 5079 5080 mutex_lock(&priv->lock); 5081 5082 netif_device_detach(ndev); 5083 stmmac_stop_all_queues(priv); 5084 5085 stmmac_disable_all_queues(priv); 5086 5087 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 5088 del_timer_sync(&priv->tx_queue[chan].txtimer); 5089 5090 /* Stop TX/RX DMA */ 5091 stmmac_stop_all_dma(priv); 5092 5093 if (priv->plat->serdes_powerdown) 5094 priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv); 5095 5096 /* Enable Power down mode by programming the PMT regs */ 5097 if (device_may_wakeup(priv->device)) { 5098 stmmac_pmt(priv, priv->hw, priv->wolopts); 5099 priv->irq_wake = 1; 5100 } else { 5101 mutex_unlock(&priv->lock); 5102 rtnl_lock(); 5103 phylink_stop(priv->phylink); 5104 rtnl_unlock(); 5105 mutex_lock(&priv->lock); 5106 5107 stmmac_mac_set(priv, priv->ioaddr, false); 5108 pinctrl_pm_select_sleep_state(priv->device); 5109 /* Disable clock in case of PWM is off */ 5110 if (priv->plat->clk_ptp_ref) 5111 clk_disable_unprepare(priv->plat->clk_ptp_ref); 5112 clk_disable_unprepare(priv->plat->pclk); 5113 clk_disable_unprepare(priv->plat->stmmac_clk); 5114 } 5115 mutex_unlock(&priv->lock); 5116 5117 priv->speed = SPEED_UNKNOWN; 5118 return 0; 5119 } 5120 EXPORT_SYMBOL_GPL(stmmac_suspend); 5121 5122 /** 5123 * stmmac_reset_queues_param - reset queue parameters 5124 * @dev: device pointer 5125 */ 5126 static void stmmac_reset_queues_param(struct stmmac_priv *priv) 5127 { 5128 u32 rx_cnt = priv->plat->rx_queues_to_use; 5129 u32 tx_cnt = priv->plat->tx_queues_to_use; 5130 u32 queue; 5131 5132 for (queue = 0; queue < rx_cnt; queue++) { 5133 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 5134 5135 rx_q->cur_rx = 0; 5136 rx_q->dirty_rx = 0; 5137 } 5138 5139 for (queue = 0; queue < tx_cnt; queue++) { 5140 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 5141 5142 tx_q->cur_tx = 0; 5143 tx_q->dirty_tx = 0; 5144 tx_q->mss = 0; 5145 } 5146 } 5147 5148 /** 5149 * stmmac_resume - resume callback 5150 * @dev: device pointer 5151 * Description: when resume this function is invoked to setup the DMA and CORE 5152 * in a usable state. 5153 */ 5154 int stmmac_resume(struct device *dev) 5155 { 5156 struct net_device *ndev = dev_get_drvdata(dev); 5157 struct stmmac_priv *priv = netdev_priv(ndev); 5158 int ret; 5159 5160 if (!netif_running(ndev)) 5161 return 0; 5162 5163 /* Power Down bit, into the PM register, is cleared 5164 * automatically as soon as a magic packet or a Wake-up frame 5165 * is received. Anyway, it's better to manually clear 5166 * this bit because it can generate problems while resuming 5167 * from another devices (e.g. serial console). 5168 */ 5169 if (device_may_wakeup(priv->device)) { 5170 mutex_lock(&priv->lock); 5171 stmmac_pmt(priv, priv->hw, 0); 5172 mutex_unlock(&priv->lock); 5173 priv->irq_wake = 0; 5174 } else { 5175 pinctrl_pm_select_default_state(priv->device); 5176 /* enable the clk previously disabled */ 5177 clk_prepare_enable(priv->plat->stmmac_clk); 5178 clk_prepare_enable(priv->plat->pclk); 5179 if (priv->plat->clk_ptp_ref) 5180 clk_prepare_enable(priv->plat->clk_ptp_ref); 5181 /* reset the phy so that it's ready */ 5182 if (priv->mii) 5183 stmmac_mdio_reset(priv->mii); 5184 } 5185 5186 if (priv->plat->serdes_powerup) { 5187 ret = priv->plat->serdes_powerup(ndev, 5188 priv->plat->bsp_priv); 5189 5190 if (ret < 0) 5191 return ret; 5192 } 5193 5194 mutex_lock(&priv->lock); 5195 5196 stmmac_reset_queues_param(priv); 5197 5198 stmmac_clear_descriptors(priv); 5199 5200 stmmac_hw_setup(ndev, false); 5201 stmmac_init_coalesce(priv); 5202 stmmac_set_rx_mode(ndev); 5203 5204 stmmac_restore_hw_vlan_rx_fltr(priv, ndev, priv->hw); 5205 5206 stmmac_enable_all_queues(priv); 5207 5208 stmmac_start_all_queues(priv); 5209 5210 mutex_unlock(&priv->lock); 5211 5212 if (!device_may_wakeup(priv->device)) { 5213 rtnl_lock(); 5214 phylink_start(priv->phylink); 5215 rtnl_unlock(); 5216 } 5217 5218 phylink_mac_change(priv->phylink, true); 5219 5220 netif_device_attach(ndev); 5221 5222 return 0; 5223 } 5224 EXPORT_SYMBOL_GPL(stmmac_resume); 5225 5226 #ifndef MODULE 5227 static int __init stmmac_cmdline_opt(char *str) 5228 { 5229 char *opt; 5230 5231 if (!str || !*str) 5232 return -EINVAL; 5233 while ((opt = strsep(&str, ",")) != NULL) { 5234 if (!strncmp(opt, "debug:", 6)) { 5235 if (kstrtoint(opt + 6, 0, &debug)) 5236 goto err; 5237 } else if (!strncmp(opt, "phyaddr:", 8)) { 5238 if (kstrtoint(opt + 8, 0, &phyaddr)) 5239 goto err; 5240 } else if (!strncmp(opt, "buf_sz:", 7)) { 5241 if (kstrtoint(opt + 7, 0, &buf_sz)) 5242 goto err; 5243 } else if (!strncmp(opt, "tc:", 3)) { 5244 if (kstrtoint(opt + 3, 0, &tc)) 5245 goto err; 5246 } else if (!strncmp(opt, "watchdog:", 9)) { 5247 if (kstrtoint(opt + 9, 0, &watchdog)) 5248 goto err; 5249 } else if (!strncmp(opt, "flow_ctrl:", 10)) { 5250 if (kstrtoint(opt + 10, 0, &flow_ctrl)) 5251 goto err; 5252 } else if (!strncmp(opt, "pause:", 6)) { 5253 if (kstrtoint(opt + 6, 0, &pause)) 5254 goto err; 5255 } else if (!strncmp(opt, "eee_timer:", 10)) { 5256 if (kstrtoint(opt + 10, 0, &eee_timer)) 5257 goto err; 5258 } else if (!strncmp(opt, "chain_mode:", 11)) { 5259 if (kstrtoint(opt + 11, 0, &chain_mode)) 5260 goto err; 5261 } 5262 } 5263 return 0; 5264 5265 err: 5266 pr_err("%s: ERROR broken module parameter conversion", __func__); 5267 return -EINVAL; 5268 } 5269 5270 __setup("stmmaceth=", stmmac_cmdline_opt); 5271 #endif /* MODULE */ 5272 5273 static int __init stmmac_init(void) 5274 { 5275 #ifdef CONFIG_DEBUG_FS 5276 /* Create debugfs main directory if it doesn't exist yet */ 5277 if (!stmmac_fs_dir) 5278 stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL); 5279 register_netdevice_notifier(&stmmac_notifier); 5280 #endif 5281 5282 return 0; 5283 } 5284 5285 static void __exit stmmac_exit(void) 5286 { 5287 #ifdef CONFIG_DEBUG_FS 5288 unregister_netdevice_notifier(&stmmac_notifier); 5289 debugfs_remove_recursive(stmmac_fs_dir); 5290 #endif 5291 } 5292 5293 module_init(stmmac_init) 5294 module_exit(stmmac_exit) 5295 5296 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver"); 5297 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 5298 MODULE_LICENSE("GPL"); 5299