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/pm_runtime.h> 32 #include <linux/prefetch.h> 33 #include <linux/pinctrl/consumer.h> 34 #ifdef CONFIG_DEBUG_FS 35 #include <linux/debugfs.h> 36 #include <linux/seq_file.h> 37 #endif /* CONFIG_DEBUG_FS */ 38 #include <linux/net_tstamp.h> 39 #include <linux/phylink.h> 40 #include <linux/udp.h> 41 #include <linux/bpf_trace.h> 42 #include <net/pkt_cls.h> 43 #include <net/xdp_sock_drv.h> 44 #include "stmmac_ptp.h" 45 #include "stmmac.h" 46 #include "stmmac_xdp.h" 47 #include <linux/reset.h> 48 #include <linux/of_mdio.h> 49 #include "dwmac1000.h" 50 #include "dwxgmac2.h" 51 #include "hwif.h" 52 53 #define STMMAC_ALIGN(x) ALIGN(ALIGN(x, SMP_CACHE_BYTES), 16) 54 #define TSO_MAX_BUFF_SIZE (SZ_16K - 1) 55 56 /* Module parameters */ 57 #define TX_TIMEO 5000 58 static int watchdog = TX_TIMEO; 59 module_param(watchdog, int, 0644); 60 MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)"); 61 62 static int debug = -1; 63 module_param(debug, int, 0644); 64 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); 65 66 static int phyaddr = -1; 67 module_param(phyaddr, int, 0444); 68 MODULE_PARM_DESC(phyaddr, "Physical device address"); 69 70 #define STMMAC_TX_THRESH(x) ((x)->dma_tx_size / 4) 71 #define STMMAC_RX_THRESH(x) ((x)->dma_rx_size / 4) 72 73 /* Limit to make sure XDP TX and slow path can coexist */ 74 #define STMMAC_XSK_TX_BUDGET_MAX 256 75 #define STMMAC_TX_XSK_AVAIL 16 76 #define STMMAC_RX_FILL_BATCH 16 77 78 #define STMMAC_XDP_PASS 0 79 #define STMMAC_XDP_CONSUMED BIT(0) 80 #define STMMAC_XDP_TX BIT(1) 81 #define STMMAC_XDP_REDIRECT BIT(2) 82 83 static int flow_ctrl = FLOW_AUTO; 84 module_param(flow_ctrl, int, 0644); 85 MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]"); 86 87 static int pause = PAUSE_TIME; 88 module_param(pause, int, 0644); 89 MODULE_PARM_DESC(pause, "Flow Control Pause Time"); 90 91 #define TC_DEFAULT 64 92 static int tc = TC_DEFAULT; 93 module_param(tc, int, 0644); 94 MODULE_PARM_DESC(tc, "DMA threshold control value"); 95 96 #define DEFAULT_BUFSIZE 1536 97 static int buf_sz = DEFAULT_BUFSIZE; 98 module_param(buf_sz, int, 0644); 99 MODULE_PARM_DESC(buf_sz, "DMA buffer size"); 100 101 #define STMMAC_RX_COPYBREAK 256 102 103 static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 104 NETIF_MSG_LINK | NETIF_MSG_IFUP | 105 NETIF_MSG_IFDOWN | NETIF_MSG_TIMER); 106 107 #define STMMAC_DEFAULT_LPI_TIMER 1000 108 static int eee_timer = STMMAC_DEFAULT_LPI_TIMER; 109 module_param(eee_timer, int, 0644); 110 MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec"); 111 #define STMMAC_LPI_T(x) (jiffies + usecs_to_jiffies(x)) 112 113 /* By default the driver will use the ring mode to manage tx and rx descriptors, 114 * but allow user to force to use the chain instead of the ring 115 */ 116 static unsigned int chain_mode; 117 module_param(chain_mode, int, 0444); 118 MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode"); 119 120 static irqreturn_t stmmac_interrupt(int irq, void *dev_id); 121 /* For MSI interrupts handling */ 122 static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id); 123 static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id); 124 static irqreturn_t stmmac_msi_intr_tx(int irq, void *data); 125 static irqreturn_t stmmac_msi_intr_rx(int irq, void *data); 126 static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue); 127 static void stmmac_flush_tx_descriptors(struct stmmac_priv *priv, int queue); 128 129 #ifdef CONFIG_DEBUG_FS 130 static const struct net_device_ops stmmac_netdev_ops; 131 static void stmmac_init_fs(struct net_device *dev); 132 static void stmmac_exit_fs(struct net_device *dev); 133 #endif 134 135 #define STMMAC_COAL_TIMER(x) (ns_to_ktime((x) * NSEC_PER_USEC)) 136 137 int stmmac_bus_clks_config(struct stmmac_priv *priv, bool enabled) 138 { 139 int ret = 0; 140 141 if (enabled) { 142 ret = clk_prepare_enable(priv->plat->stmmac_clk); 143 if (ret) 144 return ret; 145 ret = clk_prepare_enable(priv->plat->pclk); 146 if (ret) { 147 clk_disable_unprepare(priv->plat->stmmac_clk); 148 return ret; 149 } 150 if (priv->plat->clks_config) { 151 ret = priv->plat->clks_config(priv->plat->bsp_priv, enabled); 152 if (ret) { 153 clk_disable_unprepare(priv->plat->stmmac_clk); 154 clk_disable_unprepare(priv->plat->pclk); 155 return ret; 156 } 157 } 158 } else { 159 clk_disable_unprepare(priv->plat->stmmac_clk); 160 clk_disable_unprepare(priv->plat->pclk); 161 if (priv->plat->clks_config) 162 priv->plat->clks_config(priv->plat->bsp_priv, enabled); 163 } 164 165 return ret; 166 } 167 EXPORT_SYMBOL_GPL(stmmac_bus_clks_config); 168 169 /** 170 * stmmac_verify_args - verify the driver parameters. 171 * Description: it checks the driver parameters and set a default in case of 172 * errors. 173 */ 174 static void stmmac_verify_args(void) 175 { 176 if (unlikely(watchdog < 0)) 177 watchdog = TX_TIMEO; 178 if (unlikely((buf_sz < DEFAULT_BUFSIZE) || (buf_sz > BUF_SIZE_16KiB))) 179 buf_sz = DEFAULT_BUFSIZE; 180 if (unlikely(flow_ctrl > 1)) 181 flow_ctrl = FLOW_AUTO; 182 else if (likely(flow_ctrl < 0)) 183 flow_ctrl = FLOW_OFF; 184 if (unlikely((pause < 0) || (pause > 0xffff))) 185 pause = PAUSE_TIME; 186 if (eee_timer < 0) 187 eee_timer = STMMAC_DEFAULT_LPI_TIMER; 188 } 189 190 static void __stmmac_disable_all_queues(struct stmmac_priv *priv) 191 { 192 u32 rx_queues_cnt = priv->plat->rx_queues_to_use; 193 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 194 u32 maxq = max(rx_queues_cnt, tx_queues_cnt); 195 u32 queue; 196 197 for (queue = 0; queue < maxq; queue++) { 198 struct stmmac_channel *ch = &priv->channel[queue]; 199 200 if (stmmac_xdp_is_enabled(priv) && 201 test_bit(queue, priv->af_xdp_zc_qps)) { 202 napi_disable(&ch->rxtx_napi); 203 continue; 204 } 205 206 if (queue < rx_queues_cnt) 207 napi_disable(&ch->rx_napi); 208 if (queue < tx_queues_cnt) 209 napi_disable(&ch->tx_napi); 210 } 211 } 212 213 /** 214 * stmmac_disable_all_queues - Disable all queues 215 * @priv: driver private structure 216 */ 217 static void stmmac_disable_all_queues(struct stmmac_priv *priv) 218 { 219 u32 rx_queues_cnt = priv->plat->rx_queues_to_use; 220 struct stmmac_rx_queue *rx_q; 221 u32 queue; 222 223 /* synchronize_rcu() needed for pending XDP buffers to drain */ 224 for (queue = 0; queue < rx_queues_cnt; queue++) { 225 rx_q = &priv->rx_queue[queue]; 226 if (rx_q->xsk_pool) { 227 synchronize_rcu(); 228 break; 229 } 230 } 231 232 __stmmac_disable_all_queues(priv); 233 } 234 235 /** 236 * stmmac_enable_all_queues - Enable all queues 237 * @priv: driver private structure 238 */ 239 static void stmmac_enable_all_queues(struct stmmac_priv *priv) 240 { 241 u32 rx_queues_cnt = priv->plat->rx_queues_to_use; 242 u32 tx_queues_cnt = priv->plat->tx_queues_to_use; 243 u32 maxq = max(rx_queues_cnt, tx_queues_cnt); 244 u32 queue; 245 246 for (queue = 0; queue < maxq; queue++) { 247 struct stmmac_channel *ch = &priv->channel[queue]; 248 249 if (stmmac_xdp_is_enabled(priv) && 250 test_bit(queue, priv->af_xdp_zc_qps)) { 251 napi_enable(&ch->rxtx_napi); 252 continue; 253 } 254 255 if (queue < rx_queues_cnt) 256 napi_enable(&ch->rx_napi); 257 if (queue < tx_queues_cnt) 258 napi_enable(&ch->tx_napi); 259 } 260 } 261 262 static void stmmac_service_event_schedule(struct stmmac_priv *priv) 263 { 264 if (!test_bit(STMMAC_DOWN, &priv->state) && 265 !test_and_set_bit(STMMAC_SERVICE_SCHED, &priv->state)) 266 queue_work(priv->wq, &priv->service_task); 267 } 268 269 static void stmmac_global_err(struct stmmac_priv *priv) 270 { 271 netif_carrier_off(priv->dev); 272 set_bit(STMMAC_RESET_REQUESTED, &priv->state); 273 stmmac_service_event_schedule(priv); 274 } 275 276 /** 277 * stmmac_clk_csr_set - dynamically set the MDC clock 278 * @priv: driver private structure 279 * Description: this is to dynamically set the MDC clock according to the csr 280 * clock input. 281 * Note: 282 * If a specific clk_csr value is passed from the platform 283 * this means that the CSR Clock Range selection cannot be 284 * changed at run-time and it is fixed (as reported in the driver 285 * documentation). Viceversa the driver will try to set the MDC 286 * clock dynamically according to the actual clock input. 287 */ 288 static void stmmac_clk_csr_set(struct stmmac_priv *priv) 289 { 290 u32 clk_rate; 291 292 clk_rate = clk_get_rate(priv->plat->stmmac_clk); 293 294 /* Platform provided default clk_csr would be assumed valid 295 * for all other cases except for the below mentioned ones. 296 * For values higher than the IEEE 802.3 specified frequency 297 * we can not estimate the proper divider as it is not known 298 * the frequency of clk_csr_i. So we do not change the default 299 * divider. 300 */ 301 if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) { 302 if (clk_rate < CSR_F_35M) 303 priv->clk_csr = STMMAC_CSR_20_35M; 304 else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M)) 305 priv->clk_csr = STMMAC_CSR_35_60M; 306 else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M)) 307 priv->clk_csr = STMMAC_CSR_60_100M; 308 else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M)) 309 priv->clk_csr = STMMAC_CSR_100_150M; 310 else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M)) 311 priv->clk_csr = STMMAC_CSR_150_250M; 312 else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M)) 313 priv->clk_csr = STMMAC_CSR_250_300M; 314 } 315 316 if (priv->plat->has_sun8i) { 317 if (clk_rate > 160000000) 318 priv->clk_csr = 0x03; 319 else if (clk_rate > 80000000) 320 priv->clk_csr = 0x02; 321 else if (clk_rate > 40000000) 322 priv->clk_csr = 0x01; 323 else 324 priv->clk_csr = 0; 325 } 326 327 if (priv->plat->has_xgmac) { 328 if (clk_rate > 400000000) 329 priv->clk_csr = 0x5; 330 else if (clk_rate > 350000000) 331 priv->clk_csr = 0x4; 332 else if (clk_rate > 300000000) 333 priv->clk_csr = 0x3; 334 else if (clk_rate > 250000000) 335 priv->clk_csr = 0x2; 336 else if (clk_rate > 150000000) 337 priv->clk_csr = 0x1; 338 else 339 priv->clk_csr = 0x0; 340 } 341 } 342 343 static void print_pkt(unsigned char *buf, int len) 344 { 345 pr_debug("len = %d byte, buf addr: 0x%p\n", len, buf); 346 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); 347 } 348 349 static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue) 350 { 351 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 352 u32 avail; 353 354 if (tx_q->dirty_tx > tx_q->cur_tx) 355 avail = tx_q->dirty_tx - tx_q->cur_tx - 1; 356 else 357 avail = priv->dma_tx_size - tx_q->cur_tx + tx_q->dirty_tx - 1; 358 359 return avail; 360 } 361 362 /** 363 * stmmac_rx_dirty - Get RX queue dirty 364 * @priv: driver private structure 365 * @queue: RX queue index 366 */ 367 static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue) 368 { 369 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 370 u32 dirty; 371 372 if (rx_q->dirty_rx <= rx_q->cur_rx) 373 dirty = rx_q->cur_rx - rx_q->dirty_rx; 374 else 375 dirty = priv->dma_rx_size - rx_q->dirty_rx + rx_q->cur_rx; 376 377 return dirty; 378 } 379 380 static void stmmac_lpi_entry_timer_config(struct stmmac_priv *priv, bool en) 381 { 382 int tx_lpi_timer; 383 384 /* Clear/set the SW EEE timer flag based on LPI ET enablement */ 385 priv->eee_sw_timer_en = en ? 0 : 1; 386 tx_lpi_timer = en ? priv->tx_lpi_timer : 0; 387 stmmac_set_eee_lpi_timer(priv, priv->hw, tx_lpi_timer); 388 } 389 390 /** 391 * stmmac_enable_eee_mode - check and enter in LPI mode 392 * @priv: driver private structure 393 * Description: this function is to verify and enter in LPI mode in case of 394 * EEE. 395 */ 396 static void stmmac_enable_eee_mode(struct stmmac_priv *priv) 397 { 398 u32 tx_cnt = priv->plat->tx_queues_to_use; 399 u32 queue; 400 401 /* check if all TX queues have the work finished */ 402 for (queue = 0; queue < tx_cnt; queue++) { 403 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 404 405 if (tx_q->dirty_tx != tx_q->cur_tx) 406 return; /* still unfinished work */ 407 } 408 409 /* Check and enter in LPI mode */ 410 if (!priv->tx_path_in_lpi_mode) 411 stmmac_set_eee_mode(priv, priv->hw, 412 priv->plat->en_tx_lpi_clockgating); 413 } 414 415 /** 416 * stmmac_disable_eee_mode - disable and exit from LPI mode 417 * @priv: driver private structure 418 * Description: this function is to exit and disable EEE in case of 419 * LPI state is true. This is called by the xmit. 420 */ 421 void stmmac_disable_eee_mode(struct stmmac_priv *priv) 422 { 423 if (!priv->eee_sw_timer_en) { 424 stmmac_lpi_entry_timer_config(priv, 0); 425 return; 426 } 427 428 stmmac_reset_eee_mode(priv, priv->hw); 429 del_timer_sync(&priv->eee_ctrl_timer); 430 priv->tx_path_in_lpi_mode = false; 431 } 432 433 /** 434 * stmmac_eee_ctrl_timer - EEE TX SW timer. 435 * @t: timer_list struct containing private info 436 * Description: 437 * if there is no data transfer and if we are not in LPI state, 438 * then MAC Transmitter can be moved to LPI state. 439 */ 440 static void stmmac_eee_ctrl_timer(struct timer_list *t) 441 { 442 struct stmmac_priv *priv = from_timer(priv, t, eee_ctrl_timer); 443 444 stmmac_enable_eee_mode(priv); 445 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); 446 } 447 448 /** 449 * stmmac_eee_init - init EEE 450 * @priv: driver private structure 451 * Description: 452 * if the GMAC supports the EEE (from the HW cap reg) and the phy device 453 * can also manage EEE, this function enable the LPI state and start related 454 * timer. 455 */ 456 bool stmmac_eee_init(struct stmmac_priv *priv) 457 { 458 int eee_tw_timer = priv->eee_tw_timer; 459 460 /* Using PCS we cannot dial with the phy registers at this stage 461 * so we do not support extra feature like EEE. 462 */ 463 if (priv->hw->pcs == STMMAC_PCS_TBI || 464 priv->hw->pcs == STMMAC_PCS_RTBI) 465 return false; 466 467 /* Check if MAC core supports the EEE feature. */ 468 if (!priv->dma_cap.eee) 469 return false; 470 471 mutex_lock(&priv->lock); 472 473 /* Check if it needs to be deactivated */ 474 if (!priv->eee_active) { 475 if (priv->eee_enabled) { 476 netdev_dbg(priv->dev, "disable EEE\n"); 477 stmmac_lpi_entry_timer_config(priv, 0); 478 del_timer_sync(&priv->eee_ctrl_timer); 479 stmmac_set_eee_timer(priv, priv->hw, 0, eee_tw_timer); 480 } 481 mutex_unlock(&priv->lock); 482 return false; 483 } 484 485 if (priv->eee_active && !priv->eee_enabled) { 486 timer_setup(&priv->eee_ctrl_timer, stmmac_eee_ctrl_timer, 0); 487 stmmac_set_eee_timer(priv, priv->hw, STMMAC_DEFAULT_LIT_LS, 488 eee_tw_timer); 489 } 490 491 if (priv->plat->has_gmac4 && priv->tx_lpi_timer <= STMMAC_ET_MAX) { 492 del_timer_sync(&priv->eee_ctrl_timer); 493 priv->tx_path_in_lpi_mode = false; 494 stmmac_lpi_entry_timer_config(priv, 1); 495 } else { 496 stmmac_lpi_entry_timer_config(priv, 0); 497 mod_timer(&priv->eee_ctrl_timer, 498 STMMAC_LPI_T(priv->tx_lpi_timer)); 499 } 500 501 mutex_unlock(&priv->lock); 502 netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n"); 503 return true; 504 } 505 506 /* stmmac_get_tx_hwtstamp - get HW TX timestamps 507 * @priv: driver private structure 508 * @p : descriptor pointer 509 * @skb : the socket buffer 510 * Description : 511 * This function will read timestamp from the descriptor & pass it to stack. 512 * and also perform some sanity checks. 513 */ 514 static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv, 515 struct dma_desc *p, struct sk_buff *skb) 516 { 517 struct skb_shared_hwtstamps shhwtstamp; 518 bool found = false; 519 s64 adjust = 0; 520 u64 ns = 0; 521 522 if (!priv->hwts_tx_en) 523 return; 524 525 /* exit if skb doesn't support hw tstamp */ 526 if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))) 527 return; 528 529 /* check tx tstamp status */ 530 if (stmmac_get_tx_timestamp_status(priv, p)) { 531 stmmac_get_timestamp(priv, p, priv->adv_ts, &ns); 532 found = true; 533 } else if (!stmmac_get_mac_tx_timestamp(priv, priv->hw, &ns)) { 534 found = true; 535 } 536 537 if (found) { 538 /* Correct the clk domain crossing(CDC) error */ 539 if (priv->plat->has_gmac4 && priv->plat->clk_ptp_rate) { 540 adjust += -(2 * (NSEC_PER_SEC / 541 priv->plat->clk_ptp_rate)); 542 ns += adjust; 543 } 544 545 memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); 546 shhwtstamp.hwtstamp = ns_to_ktime(ns); 547 548 netdev_dbg(priv->dev, "get valid TX hw timestamp %llu\n", ns); 549 /* pass tstamp to stack */ 550 skb_tstamp_tx(skb, &shhwtstamp); 551 } 552 } 553 554 /* stmmac_get_rx_hwtstamp - get HW RX timestamps 555 * @priv: driver private structure 556 * @p : descriptor pointer 557 * @np : next descriptor pointer 558 * @skb : the socket buffer 559 * Description : 560 * This function will read received packet's timestamp from the descriptor 561 * and pass it to stack. It also perform some sanity checks. 562 */ 563 static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p, 564 struct dma_desc *np, struct sk_buff *skb) 565 { 566 struct skb_shared_hwtstamps *shhwtstamp = NULL; 567 struct dma_desc *desc = p; 568 u64 adjust = 0; 569 u64 ns = 0; 570 571 if (!priv->hwts_rx_en) 572 return; 573 /* For GMAC4, the valid timestamp is from CTX next desc. */ 574 if (priv->plat->has_gmac4 || priv->plat->has_xgmac) 575 desc = np; 576 577 /* Check if timestamp is available */ 578 if (stmmac_get_rx_timestamp_status(priv, p, np, priv->adv_ts)) { 579 stmmac_get_timestamp(priv, desc, priv->adv_ts, &ns); 580 581 /* Correct the clk domain crossing(CDC) error */ 582 if (priv->plat->has_gmac4 && priv->plat->clk_ptp_rate) { 583 adjust += 2 * (NSEC_PER_SEC / priv->plat->clk_ptp_rate); 584 ns -= adjust; 585 } 586 587 netdev_dbg(priv->dev, "get valid RX hw timestamp %llu\n", ns); 588 shhwtstamp = skb_hwtstamps(skb); 589 memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps)); 590 shhwtstamp->hwtstamp = ns_to_ktime(ns); 591 } else { 592 netdev_dbg(priv->dev, "cannot get RX hw timestamp\n"); 593 } 594 } 595 596 /** 597 * stmmac_hwtstamp_set - control hardware timestamping. 598 * @dev: device pointer. 599 * @ifr: An IOCTL specific structure, that can contain a pointer to 600 * a proprietary structure used to pass information to the driver. 601 * Description: 602 * This function configures the MAC to enable/disable both outgoing(TX) 603 * and incoming(RX) packets time stamping based on user input. 604 * Return Value: 605 * 0 on success and an appropriate -ve integer on failure. 606 */ 607 static int stmmac_hwtstamp_set(struct net_device *dev, struct ifreq *ifr) 608 { 609 struct stmmac_priv *priv = netdev_priv(dev); 610 struct hwtstamp_config config; 611 struct timespec64 now; 612 u64 temp = 0; 613 u32 ptp_v2 = 0; 614 u32 tstamp_all = 0; 615 u32 ptp_over_ipv4_udp = 0; 616 u32 ptp_over_ipv6_udp = 0; 617 u32 ptp_over_ethernet = 0; 618 u32 snap_type_sel = 0; 619 u32 ts_master_en = 0; 620 u32 ts_event_en = 0; 621 u32 sec_inc = 0; 622 u32 value = 0; 623 bool xmac; 624 625 xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 626 627 if (!(priv->dma_cap.time_stamp || priv->adv_ts)) { 628 netdev_alert(priv->dev, "No support for HW time stamping\n"); 629 priv->hwts_tx_en = 0; 630 priv->hwts_rx_en = 0; 631 632 return -EOPNOTSUPP; 633 } 634 635 if (copy_from_user(&config, ifr->ifr_data, 636 sizeof(config))) 637 return -EFAULT; 638 639 netdev_dbg(priv->dev, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n", 640 __func__, config.flags, config.tx_type, config.rx_filter); 641 642 /* reserved for future extensions */ 643 if (config.flags) 644 return -EINVAL; 645 646 if (config.tx_type != HWTSTAMP_TX_OFF && 647 config.tx_type != HWTSTAMP_TX_ON) 648 return -ERANGE; 649 650 if (priv->adv_ts) { 651 switch (config.rx_filter) { 652 case HWTSTAMP_FILTER_NONE: 653 /* time stamp no incoming packet at all */ 654 config.rx_filter = HWTSTAMP_FILTER_NONE; 655 break; 656 657 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 658 /* PTP v1, UDP, any kind of event packet */ 659 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; 660 /* 'xmac' hardware can support Sync, Pdelay_Req and 661 * Pdelay_resp by setting bit14 and bits17/16 to 01 662 * This leaves Delay_Req timestamps out. 663 * Enable all events *and* general purpose message 664 * timestamping 665 */ 666 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 667 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 668 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 669 break; 670 671 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 672 /* PTP v1, UDP, Sync packet */ 673 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC; 674 /* take time stamp for SYNC messages only */ 675 ts_event_en = PTP_TCR_TSEVNTENA; 676 677 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 678 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 679 break; 680 681 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 682 /* PTP v1, UDP, Delay_req packet */ 683 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ; 684 /* take time stamp for Delay_Req messages only */ 685 ts_master_en = PTP_TCR_TSMSTRENA; 686 ts_event_en = PTP_TCR_TSEVNTENA; 687 688 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 689 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 690 break; 691 692 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 693 /* PTP v2, UDP, any kind of event packet */ 694 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; 695 ptp_v2 = PTP_TCR_TSVER2ENA; 696 /* take time stamp for all event messages */ 697 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 698 699 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 700 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 701 break; 702 703 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 704 /* PTP v2, UDP, Sync packet */ 705 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC; 706 ptp_v2 = PTP_TCR_TSVER2ENA; 707 /* take time stamp for SYNC messages only */ 708 ts_event_en = PTP_TCR_TSEVNTENA; 709 710 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 711 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 712 break; 713 714 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 715 /* PTP v2, UDP, Delay_req packet */ 716 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ; 717 ptp_v2 = PTP_TCR_TSVER2ENA; 718 /* take time stamp for Delay_Req messages only */ 719 ts_master_en = PTP_TCR_TSMSTRENA; 720 ts_event_en = PTP_TCR_TSEVNTENA; 721 722 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 723 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 724 break; 725 726 case HWTSTAMP_FILTER_PTP_V2_EVENT: 727 /* PTP v2/802.AS1 any layer, any kind of event packet */ 728 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; 729 ptp_v2 = PTP_TCR_TSVER2ENA; 730 snap_type_sel = PTP_TCR_SNAPTYPSEL_1; 731 if (priv->synopsys_id != DWMAC_CORE_5_10) 732 ts_event_en = PTP_TCR_TSEVNTENA; 733 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 734 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 735 ptp_over_ethernet = PTP_TCR_TSIPENA; 736 break; 737 738 case HWTSTAMP_FILTER_PTP_V2_SYNC: 739 /* PTP v2/802.AS1, any layer, Sync packet */ 740 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC; 741 ptp_v2 = PTP_TCR_TSVER2ENA; 742 /* take time stamp for SYNC messages only */ 743 ts_event_en = PTP_TCR_TSEVNTENA; 744 745 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 746 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 747 ptp_over_ethernet = PTP_TCR_TSIPENA; 748 break; 749 750 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 751 /* PTP v2/802.AS1, any layer, Delay_req packet */ 752 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ; 753 ptp_v2 = PTP_TCR_TSVER2ENA; 754 /* take time stamp for Delay_Req messages only */ 755 ts_master_en = PTP_TCR_TSMSTRENA; 756 ts_event_en = PTP_TCR_TSEVNTENA; 757 758 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA; 759 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA; 760 ptp_over_ethernet = PTP_TCR_TSIPENA; 761 break; 762 763 case HWTSTAMP_FILTER_NTP_ALL: 764 case HWTSTAMP_FILTER_ALL: 765 /* time stamp any incoming packet */ 766 config.rx_filter = HWTSTAMP_FILTER_ALL; 767 tstamp_all = PTP_TCR_TSENALL; 768 break; 769 770 default: 771 return -ERANGE; 772 } 773 } else { 774 switch (config.rx_filter) { 775 case HWTSTAMP_FILTER_NONE: 776 config.rx_filter = HWTSTAMP_FILTER_NONE; 777 break; 778 default: 779 /* PTP v1, UDP, any kind of event packet */ 780 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; 781 break; 782 } 783 } 784 priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1); 785 priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON; 786 787 if (!priv->hwts_tx_en && !priv->hwts_rx_en) 788 stmmac_config_hw_tstamping(priv, priv->ptpaddr, 0); 789 else { 790 value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR | 791 tstamp_all | ptp_v2 | ptp_over_ethernet | 792 ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en | 793 ts_master_en | snap_type_sel); 794 stmmac_config_hw_tstamping(priv, priv->ptpaddr, value); 795 796 /* program Sub Second Increment reg */ 797 stmmac_config_sub_second_increment(priv, 798 priv->ptpaddr, priv->plat->clk_ptp_rate, 799 xmac, &sec_inc); 800 temp = div_u64(1000000000ULL, sec_inc); 801 802 /* Store sub second increment and flags for later use */ 803 priv->sub_second_inc = sec_inc; 804 priv->systime_flags = value; 805 806 /* calculate default added value: 807 * formula is : 808 * addend = (2^32)/freq_div_ratio; 809 * where, freq_div_ratio = 1e9ns/sec_inc 810 */ 811 temp = (u64)(temp << 32); 812 priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate); 813 stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend); 814 815 /* initialize system time */ 816 ktime_get_real_ts64(&now); 817 818 /* lower 32 bits of tv_sec are safe until y2106 */ 819 stmmac_init_systime(priv, priv->ptpaddr, 820 (u32)now.tv_sec, now.tv_nsec); 821 } 822 823 memcpy(&priv->tstamp_config, &config, sizeof(config)); 824 825 return copy_to_user(ifr->ifr_data, &config, 826 sizeof(config)) ? -EFAULT : 0; 827 } 828 829 /** 830 * stmmac_hwtstamp_get - read hardware timestamping. 831 * @dev: device pointer. 832 * @ifr: An IOCTL specific structure, that can contain a pointer to 833 * a proprietary structure used to pass information to the driver. 834 * Description: 835 * This function obtain the current hardware timestamping settings 836 * as requested. 837 */ 838 static int stmmac_hwtstamp_get(struct net_device *dev, struct ifreq *ifr) 839 { 840 struct stmmac_priv *priv = netdev_priv(dev); 841 struct hwtstamp_config *config = &priv->tstamp_config; 842 843 if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) 844 return -EOPNOTSUPP; 845 846 return copy_to_user(ifr->ifr_data, config, 847 sizeof(*config)) ? -EFAULT : 0; 848 } 849 850 /** 851 * stmmac_init_ptp - init PTP 852 * @priv: driver private structure 853 * Description: this is to verify if the HW supports the PTPv1 or PTPv2. 854 * This is done by looking at the HW cap. register. 855 * This function also registers the ptp driver. 856 */ 857 static int stmmac_init_ptp(struct stmmac_priv *priv) 858 { 859 bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 860 861 if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp)) 862 return -EOPNOTSUPP; 863 864 priv->adv_ts = 0; 865 /* Check if adv_ts can be enabled for dwmac 4.x / xgmac core */ 866 if (xmac && priv->dma_cap.atime_stamp) 867 priv->adv_ts = 1; 868 /* Dwmac 3.x core with extend_desc can support adv_ts */ 869 else if (priv->extend_desc && priv->dma_cap.atime_stamp) 870 priv->adv_ts = 1; 871 872 if (priv->dma_cap.time_stamp) 873 netdev_info(priv->dev, "IEEE 1588-2002 Timestamp supported\n"); 874 875 if (priv->adv_ts) 876 netdev_info(priv->dev, 877 "IEEE 1588-2008 Advanced Timestamp supported\n"); 878 879 priv->hwts_tx_en = 0; 880 priv->hwts_rx_en = 0; 881 882 stmmac_ptp_register(priv); 883 884 return 0; 885 } 886 887 static void stmmac_release_ptp(struct stmmac_priv *priv) 888 { 889 clk_disable_unprepare(priv->plat->clk_ptp_ref); 890 stmmac_ptp_unregister(priv); 891 } 892 893 /** 894 * stmmac_mac_flow_ctrl - Configure flow control in all queues 895 * @priv: driver private structure 896 * @duplex: duplex passed to the next function 897 * Description: It is used for configuring the flow control in all queues 898 */ 899 static void stmmac_mac_flow_ctrl(struct stmmac_priv *priv, u32 duplex) 900 { 901 u32 tx_cnt = priv->plat->tx_queues_to_use; 902 903 stmmac_flow_ctrl(priv, priv->hw, duplex, priv->flow_ctrl, 904 priv->pause, tx_cnt); 905 } 906 907 static void stmmac_validate(struct phylink_config *config, 908 unsigned long *supported, 909 struct phylink_link_state *state) 910 { 911 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 912 __ETHTOOL_DECLARE_LINK_MODE_MASK(mac_supported) = { 0, }; 913 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 914 int tx_cnt = priv->plat->tx_queues_to_use; 915 int max_speed = priv->plat->max_speed; 916 917 phylink_set(mac_supported, 10baseT_Half); 918 phylink_set(mac_supported, 10baseT_Full); 919 phylink_set(mac_supported, 100baseT_Half); 920 phylink_set(mac_supported, 100baseT_Full); 921 phylink_set(mac_supported, 1000baseT_Half); 922 phylink_set(mac_supported, 1000baseT_Full); 923 phylink_set(mac_supported, 1000baseKX_Full); 924 925 phylink_set(mac_supported, Autoneg); 926 phylink_set(mac_supported, Pause); 927 phylink_set(mac_supported, Asym_Pause); 928 phylink_set_port_modes(mac_supported); 929 930 /* Cut down 1G if asked to */ 931 if ((max_speed > 0) && (max_speed < 1000)) { 932 phylink_set(mask, 1000baseT_Full); 933 phylink_set(mask, 1000baseX_Full); 934 } else if (priv->plat->has_gmac4) { 935 if (!max_speed || max_speed >= 2500) { 936 phylink_set(mac_supported, 2500baseT_Full); 937 phylink_set(mac_supported, 2500baseX_Full); 938 } 939 } else if (priv->plat->has_xgmac) { 940 if (!max_speed || (max_speed >= 2500)) { 941 phylink_set(mac_supported, 2500baseT_Full); 942 phylink_set(mac_supported, 2500baseX_Full); 943 } 944 if (!max_speed || (max_speed >= 5000)) { 945 phylink_set(mac_supported, 5000baseT_Full); 946 } 947 if (!max_speed || (max_speed >= 10000)) { 948 phylink_set(mac_supported, 10000baseSR_Full); 949 phylink_set(mac_supported, 10000baseLR_Full); 950 phylink_set(mac_supported, 10000baseER_Full); 951 phylink_set(mac_supported, 10000baseLRM_Full); 952 phylink_set(mac_supported, 10000baseT_Full); 953 phylink_set(mac_supported, 10000baseKX4_Full); 954 phylink_set(mac_supported, 10000baseKR_Full); 955 } 956 if (!max_speed || (max_speed >= 25000)) { 957 phylink_set(mac_supported, 25000baseCR_Full); 958 phylink_set(mac_supported, 25000baseKR_Full); 959 phylink_set(mac_supported, 25000baseSR_Full); 960 } 961 if (!max_speed || (max_speed >= 40000)) { 962 phylink_set(mac_supported, 40000baseKR4_Full); 963 phylink_set(mac_supported, 40000baseCR4_Full); 964 phylink_set(mac_supported, 40000baseSR4_Full); 965 phylink_set(mac_supported, 40000baseLR4_Full); 966 } 967 if (!max_speed || (max_speed >= 50000)) { 968 phylink_set(mac_supported, 50000baseCR2_Full); 969 phylink_set(mac_supported, 50000baseKR2_Full); 970 phylink_set(mac_supported, 50000baseSR2_Full); 971 phylink_set(mac_supported, 50000baseKR_Full); 972 phylink_set(mac_supported, 50000baseSR_Full); 973 phylink_set(mac_supported, 50000baseCR_Full); 974 phylink_set(mac_supported, 50000baseLR_ER_FR_Full); 975 phylink_set(mac_supported, 50000baseDR_Full); 976 } 977 if (!max_speed || (max_speed >= 100000)) { 978 phylink_set(mac_supported, 100000baseKR4_Full); 979 phylink_set(mac_supported, 100000baseSR4_Full); 980 phylink_set(mac_supported, 100000baseCR4_Full); 981 phylink_set(mac_supported, 100000baseLR4_ER4_Full); 982 phylink_set(mac_supported, 100000baseKR2_Full); 983 phylink_set(mac_supported, 100000baseSR2_Full); 984 phylink_set(mac_supported, 100000baseCR2_Full); 985 phylink_set(mac_supported, 100000baseLR2_ER2_FR2_Full); 986 phylink_set(mac_supported, 100000baseDR2_Full); 987 } 988 } 989 990 /* Half-Duplex can only work with single queue */ 991 if (tx_cnt > 1) { 992 phylink_set(mask, 10baseT_Half); 993 phylink_set(mask, 100baseT_Half); 994 phylink_set(mask, 1000baseT_Half); 995 } 996 997 linkmode_and(supported, supported, mac_supported); 998 linkmode_andnot(supported, supported, mask); 999 1000 linkmode_and(state->advertising, state->advertising, mac_supported); 1001 linkmode_andnot(state->advertising, state->advertising, mask); 1002 1003 /* If PCS is supported, check which modes it supports. */ 1004 if (priv->hw->xpcs) 1005 xpcs_validate(priv->hw->xpcs, supported, state); 1006 } 1007 1008 static void stmmac_mac_config(struct phylink_config *config, unsigned int mode, 1009 const struct phylink_link_state *state) 1010 { 1011 /* Nothing to do, xpcs_config() handles everything */ 1012 } 1013 1014 static void stmmac_fpe_link_state_handle(struct stmmac_priv *priv, bool is_up) 1015 { 1016 struct stmmac_fpe_cfg *fpe_cfg = priv->plat->fpe_cfg; 1017 enum stmmac_fpe_state *lo_state = &fpe_cfg->lo_fpe_state; 1018 enum stmmac_fpe_state *lp_state = &fpe_cfg->lp_fpe_state; 1019 bool *hs_enable = &fpe_cfg->hs_enable; 1020 1021 if (is_up && *hs_enable) { 1022 stmmac_fpe_send_mpacket(priv, priv->ioaddr, MPACKET_VERIFY); 1023 } else { 1024 *lo_state = FPE_STATE_OFF; 1025 *lp_state = FPE_STATE_OFF; 1026 } 1027 } 1028 1029 static void stmmac_mac_link_down(struct phylink_config *config, 1030 unsigned int mode, phy_interface_t interface) 1031 { 1032 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 1033 1034 stmmac_mac_set(priv, priv->ioaddr, false); 1035 priv->eee_active = false; 1036 priv->tx_lpi_enabled = false; 1037 stmmac_eee_init(priv); 1038 stmmac_set_eee_pls(priv, priv->hw, false); 1039 1040 if (priv->dma_cap.fpesel) 1041 stmmac_fpe_link_state_handle(priv, false); 1042 } 1043 1044 static void stmmac_mac_link_up(struct phylink_config *config, 1045 struct phy_device *phy, 1046 unsigned int mode, phy_interface_t interface, 1047 int speed, int duplex, 1048 bool tx_pause, bool rx_pause) 1049 { 1050 struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev)); 1051 u32 ctrl; 1052 1053 ctrl = readl(priv->ioaddr + MAC_CTRL_REG); 1054 ctrl &= ~priv->hw->link.speed_mask; 1055 1056 if (interface == PHY_INTERFACE_MODE_USXGMII) { 1057 switch (speed) { 1058 case SPEED_10000: 1059 ctrl |= priv->hw->link.xgmii.speed10000; 1060 break; 1061 case SPEED_5000: 1062 ctrl |= priv->hw->link.xgmii.speed5000; 1063 break; 1064 case SPEED_2500: 1065 ctrl |= priv->hw->link.xgmii.speed2500; 1066 break; 1067 default: 1068 return; 1069 } 1070 } else if (interface == PHY_INTERFACE_MODE_XLGMII) { 1071 switch (speed) { 1072 case SPEED_100000: 1073 ctrl |= priv->hw->link.xlgmii.speed100000; 1074 break; 1075 case SPEED_50000: 1076 ctrl |= priv->hw->link.xlgmii.speed50000; 1077 break; 1078 case SPEED_40000: 1079 ctrl |= priv->hw->link.xlgmii.speed40000; 1080 break; 1081 case SPEED_25000: 1082 ctrl |= priv->hw->link.xlgmii.speed25000; 1083 break; 1084 case SPEED_10000: 1085 ctrl |= priv->hw->link.xgmii.speed10000; 1086 break; 1087 case SPEED_2500: 1088 ctrl |= priv->hw->link.speed2500; 1089 break; 1090 case SPEED_1000: 1091 ctrl |= priv->hw->link.speed1000; 1092 break; 1093 default: 1094 return; 1095 } 1096 } else { 1097 switch (speed) { 1098 case SPEED_2500: 1099 ctrl |= priv->hw->link.speed2500; 1100 break; 1101 case SPEED_1000: 1102 ctrl |= priv->hw->link.speed1000; 1103 break; 1104 case SPEED_100: 1105 ctrl |= priv->hw->link.speed100; 1106 break; 1107 case SPEED_10: 1108 ctrl |= priv->hw->link.speed10; 1109 break; 1110 default: 1111 return; 1112 } 1113 } 1114 1115 priv->speed = speed; 1116 1117 if (priv->plat->fix_mac_speed) 1118 priv->plat->fix_mac_speed(priv->plat->bsp_priv, speed); 1119 1120 if (!duplex) 1121 ctrl &= ~priv->hw->link.duplex; 1122 else 1123 ctrl |= priv->hw->link.duplex; 1124 1125 /* Flow Control operation */ 1126 if (tx_pause && rx_pause) 1127 stmmac_mac_flow_ctrl(priv, duplex); 1128 1129 writel(ctrl, priv->ioaddr + MAC_CTRL_REG); 1130 1131 stmmac_mac_set(priv, priv->ioaddr, true); 1132 if (phy && priv->dma_cap.eee) { 1133 priv->eee_active = phy_init_eee(phy, 1) >= 0; 1134 priv->eee_enabled = stmmac_eee_init(priv); 1135 priv->tx_lpi_enabled = priv->eee_enabled; 1136 stmmac_set_eee_pls(priv, priv->hw, true); 1137 } 1138 1139 if (priv->dma_cap.fpesel) 1140 stmmac_fpe_link_state_handle(priv, true); 1141 } 1142 1143 static const struct phylink_mac_ops stmmac_phylink_mac_ops = { 1144 .validate = stmmac_validate, 1145 .mac_config = stmmac_mac_config, 1146 .mac_link_down = stmmac_mac_link_down, 1147 .mac_link_up = stmmac_mac_link_up, 1148 }; 1149 1150 /** 1151 * stmmac_check_pcs_mode - verify if RGMII/SGMII is supported 1152 * @priv: driver private structure 1153 * Description: this is to verify if the HW supports the PCS. 1154 * Physical Coding Sublayer (PCS) interface that can be used when the MAC is 1155 * configured for the TBI, RTBI, or SGMII PHY interface. 1156 */ 1157 static void stmmac_check_pcs_mode(struct stmmac_priv *priv) 1158 { 1159 int interface = priv->plat->interface; 1160 1161 if (priv->dma_cap.pcs) { 1162 if ((interface == PHY_INTERFACE_MODE_RGMII) || 1163 (interface == PHY_INTERFACE_MODE_RGMII_ID) || 1164 (interface == PHY_INTERFACE_MODE_RGMII_RXID) || 1165 (interface == PHY_INTERFACE_MODE_RGMII_TXID)) { 1166 netdev_dbg(priv->dev, "PCS RGMII support enabled\n"); 1167 priv->hw->pcs = STMMAC_PCS_RGMII; 1168 } else if (interface == PHY_INTERFACE_MODE_SGMII) { 1169 netdev_dbg(priv->dev, "PCS SGMII support enabled\n"); 1170 priv->hw->pcs = STMMAC_PCS_SGMII; 1171 } 1172 } 1173 } 1174 1175 /** 1176 * stmmac_init_phy - PHY initialization 1177 * @dev: net device structure 1178 * Description: it initializes the driver's PHY state, and attaches the PHY 1179 * to the mac driver. 1180 * Return value: 1181 * 0 on success 1182 */ 1183 static int stmmac_init_phy(struct net_device *dev) 1184 { 1185 struct stmmac_priv *priv = netdev_priv(dev); 1186 struct device_node *node; 1187 int ret; 1188 1189 node = priv->plat->phylink_node; 1190 1191 if (node) 1192 ret = phylink_of_phy_connect(priv->phylink, node, 0); 1193 1194 /* Some DT bindings do not set-up the PHY handle. Let's try to 1195 * manually parse it 1196 */ 1197 if (!node || ret) { 1198 int addr = priv->plat->phy_addr; 1199 struct phy_device *phydev; 1200 1201 phydev = mdiobus_get_phy(priv->mii, addr); 1202 if (!phydev) { 1203 netdev_err(priv->dev, "no phy at addr %d\n", addr); 1204 return -ENODEV; 1205 } 1206 1207 ret = phylink_connect_phy(priv->phylink, phydev); 1208 } 1209 1210 if (!priv->plat->pmt) { 1211 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 1212 1213 phylink_ethtool_get_wol(priv->phylink, &wol); 1214 device_set_wakeup_capable(priv->device, !!wol.supported); 1215 } 1216 1217 return ret; 1218 } 1219 1220 static int stmmac_phy_setup(struct stmmac_priv *priv) 1221 { 1222 struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data; 1223 struct fwnode_handle *fwnode = of_fwnode_handle(priv->plat->phylink_node); 1224 int mode = priv->plat->phy_interface; 1225 struct phylink *phylink; 1226 1227 priv->phylink_config.dev = &priv->dev->dev; 1228 priv->phylink_config.type = PHYLINK_NETDEV; 1229 priv->phylink_config.pcs_poll = true; 1230 if (priv->plat->mdio_bus_data) 1231 priv->phylink_config.ovr_an_inband = 1232 mdio_bus_data->xpcs_an_inband; 1233 1234 if (!fwnode) 1235 fwnode = dev_fwnode(priv->device); 1236 1237 phylink = phylink_create(&priv->phylink_config, fwnode, 1238 mode, &stmmac_phylink_mac_ops); 1239 if (IS_ERR(phylink)) 1240 return PTR_ERR(phylink); 1241 1242 if (priv->hw->xpcs) 1243 phylink_set_pcs(phylink, &priv->hw->xpcs->pcs); 1244 1245 priv->phylink = phylink; 1246 return 0; 1247 } 1248 1249 static void stmmac_display_rx_rings(struct stmmac_priv *priv) 1250 { 1251 u32 rx_cnt = priv->plat->rx_queues_to_use; 1252 unsigned int desc_size; 1253 void *head_rx; 1254 u32 queue; 1255 1256 /* Display RX rings */ 1257 for (queue = 0; queue < rx_cnt; queue++) { 1258 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1259 1260 pr_info("\tRX Queue %u rings\n", queue); 1261 1262 if (priv->extend_desc) { 1263 head_rx = (void *)rx_q->dma_erx; 1264 desc_size = sizeof(struct dma_extended_desc); 1265 } else { 1266 head_rx = (void *)rx_q->dma_rx; 1267 desc_size = sizeof(struct dma_desc); 1268 } 1269 1270 /* Display RX ring */ 1271 stmmac_display_ring(priv, head_rx, priv->dma_rx_size, true, 1272 rx_q->dma_rx_phy, desc_size); 1273 } 1274 } 1275 1276 static void stmmac_display_tx_rings(struct stmmac_priv *priv) 1277 { 1278 u32 tx_cnt = priv->plat->tx_queues_to_use; 1279 unsigned int desc_size; 1280 void *head_tx; 1281 u32 queue; 1282 1283 /* Display TX rings */ 1284 for (queue = 0; queue < tx_cnt; queue++) { 1285 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1286 1287 pr_info("\tTX Queue %d rings\n", queue); 1288 1289 if (priv->extend_desc) { 1290 head_tx = (void *)tx_q->dma_etx; 1291 desc_size = sizeof(struct dma_extended_desc); 1292 } else if (tx_q->tbs & STMMAC_TBS_AVAIL) { 1293 head_tx = (void *)tx_q->dma_entx; 1294 desc_size = sizeof(struct dma_edesc); 1295 } else { 1296 head_tx = (void *)tx_q->dma_tx; 1297 desc_size = sizeof(struct dma_desc); 1298 } 1299 1300 stmmac_display_ring(priv, head_tx, priv->dma_tx_size, false, 1301 tx_q->dma_tx_phy, desc_size); 1302 } 1303 } 1304 1305 static void stmmac_display_rings(struct stmmac_priv *priv) 1306 { 1307 /* Display RX ring */ 1308 stmmac_display_rx_rings(priv); 1309 1310 /* Display TX ring */ 1311 stmmac_display_tx_rings(priv); 1312 } 1313 1314 static int stmmac_set_bfsize(int mtu, int bufsize) 1315 { 1316 int ret = bufsize; 1317 1318 if (mtu >= BUF_SIZE_8KiB) 1319 ret = BUF_SIZE_16KiB; 1320 else if (mtu >= BUF_SIZE_4KiB) 1321 ret = BUF_SIZE_8KiB; 1322 else if (mtu >= BUF_SIZE_2KiB) 1323 ret = BUF_SIZE_4KiB; 1324 else if (mtu > DEFAULT_BUFSIZE) 1325 ret = BUF_SIZE_2KiB; 1326 else 1327 ret = DEFAULT_BUFSIZE; 1328 1329 return ret; 1330 } 1331 1332 /** 1333 * stmmac_clear_rx_descriptors - clear RX descriptors 1334 * @priv: driver private structure 1335 * @queue: RX queue index 1336 * Description: this function is called to clear the RX descriptors 1337 * in case of both basic and extended descriptors are used. 1338 */ 1339 static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue) 1340 { 1341 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1342 int i; 1343 1344 /* Clear the RX descriptors */ 1345 for (i = 0; i < priv->dma_rx_size; i++) 1346 if (priv->extend_desc) 1347 stmmac_init_rx_desc(priv, &rx_q->dma_erx[i].basic, 1348 priv->use_riwt, priv->mode, 1349 (i == priv->dma_rx_size - 1), 1350 priv->dma_buf_sz); 1351 else 1352 stmmac_init_rx_desc(priv, &rx_q->dma_rx[i], 1353 priv->use_riwt, priv->mode, 1354 (i == priv->dma_rx_size - 1), 1355 priv->dma_buf_sz); 1356 } 1357 1358 /** 1359 * stmmac_clear_tx_descriptors - clear tx descriptors 1360 * @priv: driver private structure 1361 * @queue: TX queue index. 1362 * Description: this function is called to clear the TX descriptors 1363 * in case of both basic and extended descriptors are used. 1364 */ 1365 static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue) 1366 { 1367 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1368 int i; 1369 1370 /* Clear the TX descriptors */ 1371 for (i = 0; i < priv->dma_tx_size; i++) { 1372 int last = (i == (priv->dma_tx_size - 1)); 1373 struct dma_desc *p; 1374 1375 if (priv->extend_desc) 1376 p = &tx_q->dma_etx[i].basic; 1377 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1378 p = &tx_q->dma_entx[i].basic; 1379 else 1380 p = &tx_q->dma_tx[i]; 1381 1382 stmmac_init_tx_desc(priv, p, priv->mode, last); 1383 } 1384 } 1385 1386 /** 1387 * stmmac_clear_descriptors - clear descriptors 1388 * @priv: driver private structure 1389 * Description: this function is called to clear the TX and RX descriptors 1390 * in case of both basic and extended descriptors are used. 1391 */ 1392 static void stmmac_clear_descriptors(struct stmmac_priv *priv) 1393 { 1394 u32 rx_queue_cnt = priv->plat->rx_queues_to_use; 1395 u32 tx_queue_cnt = priv->plat->tx_queues_to_use; 1396 u32 queue; 1397 1398 /* Clear the RX descriptors */ 1399 for (queue = 0; queue < rx_queue_cnt; queue++) 1400 stmmac_clear_rx_descriptors(priv, queue); 1401 1402 /* Clear the TX descriptors */ 1403 for (queue = 0; queue < tx_queue_cnt; queue++) 1404 stmmac_clear_tx_descriptors(priv, queue); 1405 } 1406 1407 /** 1408 * stmmac_init_rx_buffers - init the RX descriptor buffer. 1409 * @priv: driver private structure 1410 * @p: descriptor pointer 1411 * @i: descriptor index 1412 * @flags: gfp flag 1413 * @queue: RX queue index 1414 * Description: this function is called to allocate a receive buffer, perform 1415 * the DMA mapping and init the descriptor. 1416 */ 1417 static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p, 1418 int i, gfp_t flags, u32 queue) 1419 { 1420 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1421 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i]; 1422 1423 if (!buf->page) { 1424 buf->page = page_pool_dev_alloc_pages(rx_q->page_pool); 1425 if (!buf->page) 1426 return -ENOMEM; 1427 buf->page_offset = stmmac_rx_offset(priv); 1428 } 1429 1430 if (priv->sph && !buf->sec_page) { 1431 buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool); 1432 if (!buf->sec_page) 1433 return -ENOMEM; 1434 1435 buf->sec_addr = page_pool_get_dma_addr(buf->sec_page); 1436 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr, true); 1437 } else { 1438 buf->sec_page = NULL; 1439 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr, false); 1440 } 1441 1442 buf->addr = page_pool_get_dma_addr(buf->page) + buf->page_offset; 1443 1444 stmmac_set_desc_addr(priv, p, buf->addr); 1445 if (priv->dma_buf_sz == BUF_SIZE_16KiB) 1446 stmmac_init_desc3(priv, p); 1447 1448 return 0; 1449 } 1450 1451 /** 1452 * stmmac_free_rx_buffer - free RX dma buffers 1453 * @priv: private structure 1454 * @queue: RX queue index 1455 * @i: buffer index. 1456 */ 1457 static void stmmac_free_rx_buffer(struct stmmac_priv *priv, u32 queue, int i) 1458 { 1459 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1460 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i]; 1461 1462 if (buf->page) 1463 page_pool_put_full_page(rx_q->page_pool, buf->page, false); 1464 buf->page = NULL; 1465 1466 if (buf->sec_page) 1467 page_pool_put_full_page(rx_q->page_pool, buf->sec_page, false); 1468 buf->sec_page = NULL; 1469 } 1470 1471 /** 1472 * stmmac_free_tx_buffer - free RX dma buffers 1473 * @priv: private structure 1474 * @queue: RX queue index 1475 * @i: buffer index. 1476 */ 1477 static void stmmac_free_tx_buffer(struct stmmac_priv *priv, u32 queue, int i) 1478 { 1479 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1480 1481 if (tx_q->tx_skbuff_dma[i].buf && 1482 tx_q->tx_skbuff_dma[i].buf_type != STMMAC_TXBUF_T_XDP_TX) { 1483 if (tx_q->tx_skbuff_dma[i].map_as_page) 1484 dma_unmap_page(priv->device, 1485 tx_q->tx_skbuff_dma[i].buf, 1486 tx_q->tx_skbuff_dma[i].len, 1487 DMA_TO_DEVICE); 1488 else 1489 dma_unmap_single(priv->device, 1490 tx_q->tx_skbuff_dma[i].buf, 1491 tx_q->tx_skbuff_dma[i].len, 1492 DMA_TO_DEVICE); 1493 } 1494 1495 if (tx_q->xdpf[i] && 1496 (tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_XDP_TX || 1497 tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_XDP_NDO)) { 1498 xdp_return_frame(tx_q->xdpf[i]); 1499 tx_q->xdpf[i] = NULL; 1500 } 1501 1502 if (tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_XSK_TX) 1503 tx_q->xsk_frames_done++; 1504 1505 if (tx_q->tx_skbuff[i] && 1506 tx_q->tx_skbuff_dma[i].buf_type == STMMAC_TXBUF_T_SKB) { 1507 dev_kfree_skb_any(tx_q->tx_skbuff[i]); 1508 tx_q->tx_skbuff[i] = NULL; 1509 } 1510 1511 tx_q->tx_skbuff_dma[i].buf = 0; 1512 tx_q->tx_skbuff_dma[i].map_as_page = false; 1513 } 1514 1515 /** 1516 * dma_free_rx_skbufs - free RX dma buffers 1517 * @priv: private structure 1518 * @queue: RX queue index 1519 */ 1520 static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue) 1521 { 1522 int i; 1523 1524 for (i = 0; i < priv->dma_rx_size; i++) 1525 stmmac_free_rx_buffer(priv, queue, i); 1526 } 1527 1528 static int stmmac_alloc_rx_buffers(struct stmmac_priv *priv, u32 queue, 1529 gfp_t flags) 1530 { 1531 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1532 int i; 1533 1534 for (i = 0; i < priv->dma_rx_size; i++) { 1535 struct dma_desc *p; 1536 int ret; 1537 1538 if (priv->extend_desc) 1539 p = &((rx_q->dma_erx + i)->basic); 1540 else 1541 p = rx_q->dma_rx + i; 1542 1543 ret = stmmac_init_rx_buffers(priv, p, i, flags, 1544 queue); 1545 if (ret) 1546 return ret; 1547 1548 rx_q->buf_alloc_num++; 1549 } 1550 1551 return 0; 1552 } 1553 1554 /** 1555 * dma_free_rx_xskbufs - free RX dma buffers from XSK pool 1556 * @priv: private structure 1557 * @queue: RX queue index 1558 */ 1559 static void dma_free_rx_xskbufs(struct stmmac_priv *priv, u32 queue) 1560 { 1561 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1562 int i; 1563 1564 for (i = 0; i < priv->dma_rx_size; i++) { 1565 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[i]; 1566 1567 if (!buf->xdp) 1568 continue; 1569 1570 xsk_buff_free(buf->xdp); 1571 buf->xdp = NULL; 1572 } 1573 } 1574 1575 static int stmmac_alloc_rx_buffers_zc(struct stmmac_priv *priv, u32 queue) 1576 { 1577 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1578 int i; 1579 1580 for (i = 0; i < priv->dma_rx_size; i++) { 1581 struct stmmac_rx_buffer *buf; 1582 dma_addr_t dma_addr; 1583 struct dma_desc *p; 1584 1585 if (priv->extend_desc) 1586 p = (struct dma_desc *)(rx_q->dma_erx + i); 1587 else 1588 p = rx_q->dma_rx + i; 1589 1590 buf = &rx_q->buf_pool[i]; 1591 1592 buf->xdp = xsk_buff_alloc(rx_q->xsk_pool); 1593 if (!buf->xdp) 1594 return -ENOMEM; 1595 1596 dma_addr = xsk_buff_xdp_get_dma(buf->xdp); 1597 stmmac_set_desc_addr(priv, p, dma_addr); 1598 rx_q->buf_alloc_num++; 1599 } 1600 1601 return 0; 1602 } 1603 1604 static struct xsk_buff_pool *stmmac_get_xsk_pool(struct stmmac_priv *priv, u32 queue) 1605 { 1606 if (!stmmac_xdp_is_enabled(priv) || !test_bit(queue, priv->af_xdp_zc_qps)) 1607 return NULL; 1608 1609 return xsk_get_pool_from_qid(priv->dev, queue); 1610 } 1611 1612 /** 1613 * __init_dma_rx_desc_rings - init the RX descriptor ring (per queue) 1614 * @priv: driver private structure 1615 * @queue: RX queue index 1616 * @flags: gfp flag. 1617 * Description: this function initializes the DMA RX descriptors 1618 * and allocates the socket buffers. It supports the chained and ring 1619 * modes. 1620 */ 1621 static int __init_dma_rx_desc_rings(struct stmmac_priv *priv, u32 queue, gfp_t flags) 1622 { 1623 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1624 int ret; 1625 1626 netif_dbg(priv, probe, priv->dev, 1627 "(%s) dma_rx_phy=0x%08x\n", __func__, 1628 (u32)rx_q->dma_rx_phy); 1629 1630 stmmac_clear_rx_descriptors(priv, queue); 1631 1632 xdp_rxq_info_unreg_mem_model(&rx_q->xdp_rxq); 1633 1634 rx_q->xsk_pool = stmmac_get_xsk_pool(priv, queue); 1635 1636 if (rx_q->xsk_pool) { 1637 WARN_ON(xdp_rxq_info_reg_mem_model(&rx_q->xdp_rxq, 1638 MEM_TYPE_XSK_BUFF_POOL, 1639 NULL)); 1640 netdev_info(priv->dev, 1641 "Register MEM_TYPE_XSK_BUFF_POOL RxQ-%d\n", 1642 rx_q->queue_index); 1643 xsk_pool_set_rxq_info(rx_q->xsk_pool, &rx_q->xdp_rxq); 1644 } else { 1645 WARN_ON(xdp_rxq_info_reg_mem_model(&rx_q->xdp_rxq, 1646 MEM_TYPE_PAGE_POOL, 1647 rx_q->page_pool)); 1648 netdev_info(priv->dev, 1649 "Register MEM_TYPE_PAGE_POOL RxQ-%d\n", 1650 rx_q->queue_index); 1651 } 1652 1653 if (rx_q->xsk_pool) { 1654 /* RX XDP ZC buffer pool may not be populated, e.g. 1655 * xdpsock TX-only. 1656 */ 1657 stmmac_alloc_rx_buffers_zc(priv, queue); 1658 } else { 1659 ret = stmmac_alloc_rx_buffers(priv, queue, flags); 1660 if (ret < 0) 1661 return -ENOMEM; 1662 } 1663 1664 rx_q->cur_rx = 0; 1665 rx_q->dirty_rx = 0; 1666 1667 /* Setup the chained descriptor addresses */ 1668 if (priv->mode == STMMAC_CHAIN_MODE) { 1669 if (priv->extend_desc) 1670 stmmac_mode_init(priv, rx_q->dma_erx, 1671 rx_q->dma_rx_phy, 1672 priv->dma_rx_size, 1); 1673 else 1674 stmmac_mode_init(priv, rx_q->dma_rx, 1675 rx_q->dma_rx_phy, 1676 priv->dma_rx_size, 0); 1677 } 1678 1679 return 0; 1680 } 1681 1682 static int init_dma_rx_desc_rings(struct net_device *dev, gfp_t flags) 1683 { 1684 struct stmmac_priv *priv = netdev_priv(dev); 1685 u32 rx_count = priv->plat->rx_queues_to_use; 1686 u32 queue; 1687 int ret; 1688 1689 /* RX INITIALIZATION */ 1690 netif_dbg(priv, probe, priv->dev, 1691 "SKB addresses:\nskb\t\tskb data\tdma data\n"); 1692 1693 for (queue = 0; queue < rx_count; queue++) { 1694 ret = __init_dma_rx_desc_rings(priv, queue, flags); 1695 if (ret) 1696 goto err_init_rx_buffers; 1697 } 1698 1699 return 0; 1700 1701 err_init_rx_buffers: 1702 while (queue >= 0) { 1703 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1704 1705 if (rx_q->xsk_pool) 1706 dma_free_rx_xskbufs(priv, queue); 1707 else 1708 dma_free_rx_skbufs(priv, queue); 1709 1710 rx_q->buf_alloc_num = 0; 1711 rx_q->xsk_pool = NULL; 1712 1713 if (queue == 0) 1714 break; 1715 1716 queue--; 1717 } 1718 1719 return ret; 1720 } 1721 1722 /** 1723 * __init_dma_tx_desc_rings - init the TX descriptor ring (per queue) 1724 * @priv: driver private structure 1725 * @queue : TX queue index 1726 * Description: this function initializes the DMA TX descriptors 1727 * and allocates the socket buffers. It supports the chained and ring 1728 * modes. 1729 */ 1730 static int __init_dma_tx_desc_rings(struct stmmac_priv *priv, u32 queue) 1731 { 1732 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1733 int i; 1734 1735 netif_dbg(priv, probe, priv->dev, 1736 "(%s) dma_tx_phy=0x%08x\n", __func__, 1737 (u32)tx_q->dma_tx_phy); 1738 1739 /* Setup the chained descriptor addresses */ 1740 if (priv->mode == STMMAC_CHAIN_MODE) { 1741 if (priv->extend_desc) 1742 stmmac_mode_init(priv, tx_q->dma_etx, 1743 tx_q->dma_tx_phy, 1744 priv->dma_tx_size, 1); 1745 else if (!(tx_q->tbs & STMMAC_TBS_AVAIL)) 1746 stmmac_mode_init(priv, tx_q->dma_tx, 1747 tx_q->dma_tx_phy, 1748 priv->dma_tx_size, 0); 1749 } 1750 1751 tx_q->xsk_pool = stmmac_get_xsk_pool(priv, queue); 1752 1753 for (i = 0; i < priv->dma_tx_size; i++) { 1754 struct dma_desc *p; 1755 1756 if (priv->extend_desc) 1757 p = &((tx_q->dma_etx + i)->basic); 1758 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 1759 p = &((tx_q->dma_entx + i)->basic); 1760 else 1761 p = tx_q->dma_tx + i; 1762 1763 stmmac_clear_desc(priv, p); 1764 1765 tx_q->tx_skbuff_dma[i].buf = 0; 1766 tx_q->tx_skbuff_dma[i].map_as_page = false; 1767 tx_q->tx_skbuff_dma[i].len = 0; 1768 tx_q->tx_skbuff_dma[i].last_segment = false; 1769 tx_q->tx_skbuff[i] = NULL; 1770 } 1771 1772 tx_q->dirty_tx = 0; 1773 tx_q->cur_tx = 0; 1774 tx_q->mss = 0; 1775 1776 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue)); 1777 1778 return 0; 1779 } 1780 1781 static int init_dma_tx_desc_rings(struct net_device *dev) 1782 { 1783 struct stmmac_priv *priv = netdev_priv(dev); 1784 u32 tx_queue_cnt; 1785 u32 queue; 1786 1787 tx_queue_cnt = priv->plat->tx_queues_to_use; 1788 1789 for (queue = 0; queue < tx_queue_cnt; queue++) 1790 __init_dma_tx_desc_rings(priv, queue); 1791 1792 return 0; 1793 } 1794 1795 /** 1796 * init_dma_desc_rings - init the RX/TX descriptor rings 1797 * @dev: net device structure 1798 * @flags: gfp flag. 1799 * Description: this function initializes the DMA RX/TX descriptors 1800 * and allocates the socket buffers. It supports the chained and ring 1801 * modes. 1802 */ 1803 static int init_dma_desc_rings(struct net_device *dev, gfp_t flags) 1804 { 1805 struct stmmac_priv *priv = netdev_priv(dev); 1806 int ret; 1807 1808 ret = init_dma_rx_desc_rings(dev, flags); 1809 if (ret) 1810 return ret; 1811 1812 ret = init_dma_tx_desc_rings(dev); 1813 1814 stmmac_clear_descriptors(priv); 1815 1816 if (netif_msg_hw(priv)) 1817 stmmac_display_rings(priv); 1818 1819 return ret; 1820 } 1821 1822 /** 1823 * dma_free_tx_skbufs - free TX dma buffers 1824 * @priv: private structure 1825 * @queue: TX queue index 1826 */ 1827 static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue) 1828 { 1829 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1830 int i; 1831 1832 tx_q->xsk_frames_done = 0; 1833 1834 for (i = 0; i < priv->dma_tx_size; i++) 1835 stmmac_free_tx_buffer(priv, queue, i); 1836 1837 if (tx_q->xsk_pool && tx_q->xsk_frames_done) { 1838 xsk_tx_completed(tx_q->xsk_pool, tx_q->xsk_frames_done); 1839 tx_q->xsk_frames_done = 0; 1840 tx_q->xsk_pool = NULL; 1841 } 1842 } 1843 1844 /** 1845 * stmmac_free_tx_skbufs - free TX skb buffers 1846 * @priv: private structure 1847 */ 1848 static void stmmac_free_tx_skbufs(struct stmmac_priv *priv) 1849 { 1850 u32 tx_queue_cnt = priv->plat->tx_queues_to_use; 1851 u32 queue; 1852 1853 for (queue = 0; queue < tx_queue_cnt; queue++) 1854 dma_free_tx_skbufs(priv, queue); 1855 } 1856 1857 /** 1858 * __free_dma_rx_desc_resources - free RX dma desc resources (per queue) 1859 * @priv: private structure 1860 * @queue: RX queue index 1861 */ 1862 static void __free_dma_rx_desc_resources(struct stmmac_priv *priv, u32 queue) 1863 { 1864 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1865 1866 /* Release the DMA RX socket buffers */ 1867 if (rx_q->xsk_pool) 1868 dma_free_rx_xskbufs(priv, queue); 1869 else 1870 dma_free_rx_skbufs(priv, queue); 1871 1872 rx_q->buf_alloc_num = 0; 1873 rx_q->xsk_pool = NULL; 1874 1875 /* Free DMA regions of consistent memory previously allocated */ 1876 if (!priv->extend_desc) 1877 dma_free_coherent(priv->device, priv->dma_rx_size * 1878 sizeof(struct dma_desc), 1879 rx_q->dma_rx, rx_q->dma_rx_phy); 1880 else 1881 dma_free_coherent(priv->device, priv->dma_rx_size * 1882 sizeof(struct dma_extended_desc), 1883 rx_q->dma_erx, rx_q->dma_rx_phy); 1884 1885 if (xdp_rxq_info_is_reg(&rx_q->xdp_rxq)) 1886 xdp_rxq_info_unreg(&rx_q->xdp_rxq); 1887 1888 kfree(rx_q->buf_pool); 1889 if (rx_q->page_pool) 1890 page_pool_destroy(rx_q->page_pool); 1891 } 1892 1893 static void free_dma_rx_desc_resources(struct stmmac_priv *priv) 1894 { 1895 u32 rx_count = priv->plat->rx_queues_to_use; 1896 u32 queue; 1897 1898 /* Free RX queue resources */ 1899 for (queue = 0; queue < rx_count; queue++) 1900 __free_dma_rx_desc_resources(priv, queue); 1901 } 1902 1903 /** 1904 * __free_dma_tx_desc_resources - free TX dma desc resources (per queue) 1905 * @priv: private structure 1906 * @queue: TX queue index 1907 */ 1908 static void __free_dma_tx_desc_resources(struct stmmac_priv *priv, u32 queue) 1909 { 1910 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 1911 size_t size; 1912 void *addr; 1913 1914 /* Release the DMA TX socket buffers */ 1915 dma_free_tx_skbufs(priv, queue); 1916 1917 if (priv->extend_desc) { 1918 size = sizeof(struct dma_extended_desc); 1919 addr = tx_q->dma_etx; 1920 } else if (tx_q->tbs & STMMAC_TBS_AVAIL) { 1921 size = sizeof(struct dma_edesc); 1922 addr = tx_q->dma_entx; 1923 } else { 1924 size = sizeof(struct dma_desc); 1925 addr = tx_q->dma_tx; 1926 } 1927 1928 size *= priv->dma_tx_size; 1929 1930 dma_free_coherent(priv->device, size, addr, tx_q->dma_tx_phy); 1931 1932 kfree(tx_q->tx_skbuff_dma); 1933 kfree(tx_q->tx_skbuff); 1934 } 1935 1936 static void free_dma_tx_desc_resources(struct stmmac_priv *priv) 1937 { 1938 u32 tx_count = priv->plat->tx_queues_to_use; 1939 u32 queue; 1940 1941 /* Free TX queue resources */ 1942 for (queue = 0; queue < tx_count; queue++) 1943 __free_dma_tx_desc_resources(priv, queue); 1944 } 1945 1946 /** 1947 * __alloc_dma_rx_desc_resources - alloc RX resources (per queue). 1948 * @priv: private structure 1949 * @queue: RX queue index 1950 * Description: according to which descriptor can be used (extend or basic) 1951 * this function allocates the resources for TX and RX paths. In case of 1952 * reception, for example, it pre-allocated the RX socket buffer in order to 1953 * allow zero-copy mechanism. 1954 */ 1955 static int __alloc_dma_rx_desc_resources(struct stmmac_priv *priv, u32 queue) 1956 { 1957 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 1958 struct stmmac_channel *ch = &priv->channel[queue]; 1959 bool xdp_prog = stmmac_xdp_is_enabled(priv); 1960 struct page_pool_params pp_params = { 0 }; 1961 unsigned int num_pages; 1962 unsigned int napi_id; 1963 int ret; 1964 1965 rx_q->queue_index = queue; 1966 rx_q->priv_data = priv; 1967 1968 pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; 1969 pp_params.pool_size = priv->dma_rx_size; 1970 num_pages = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE); 1971 pp_params.order = ilog2(num_pages); 1972 pp_params.nid = dev_to_node(priv->device); 1973 pp_params.dev = priv->device; 1974 pp_params.dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; 1975 pp_params.offset = stmmac_rx_offset(priv); 1976 pp_params.max_len = STMMAC_MAX_RX_BUF_SIZE(num_pages); 1977 1978 rx_q->page_pool = page_pool_create(&pp_params); 1979 if (IS_ERR(rx_q->page_pool)) { 1980 ret = PTR_ERR(rx_q->page_pool); 1981 rx_q->page_pool = NULL; 1982 return ret; 1983 } 1984 1985 rx_q->buf_pool = kcalloc(priv->dma_rx_size, 1986 sizeof(*rx_q->buf_pool), 1987 GFP_KERNEL); 1988 if (!rx_q->buf_pool) 1989 return -ENOMEM; 1990 1991 if (priv->extend_desc) { 1992 rx_q->dma_erx = dma_alloc_coherent(priv->device, 1993 priv->dma_rx_size * 1994 sizeof(struct dma_extended_desc), 1995 &rx_q->dma_rx_phy, 1996 GFP_KERNEL); 1997 if (!rx_q->dma_erx) 1998 return -ENOMEM; 1999 2000 } else { 2001 rx_q->dma_rx = dma_alloc_coherent(priv->device, 2002 priv->dma_rx_size * 2003 sizeof(struct dma_desc), 2004 &rx_q->dma_rx_phy, 2005 GFP_KERNEL); 2006 if (!rx_q->dma_rx) 2007 return -ENOMEM; 2008 } 2009 2010 if (stmmac_xdp_is_enabled(priv) && 2011 test_bit(queue, priv->af_xdp_zc_qps)) 2012 napi_id = ch->rxtx_napi.napi_id; 2013 else 2014 napi_id = ch->rx_napi.napi_id; 2015 2016 ret = xdp_rxq_info_reg(&rx_q->xdp_rxq, priv->dev, 2017 rx_q->queue_index, 2018 napi_id); 2019 if (ret) { 2020 netdev_err(priv->dev, "Failed to register xdp rxq info\n"); 2021 return -EINVAL; 2022 } 2023 2024 return 0; 2025 } 2026 2027 static int alloc_dma_rx_desc_resources(struct stmmac_priv *priv) 2028 { 2029 u32 rx_count = priv->plat->rx_queues_to_use; 2030 u32 queue; 2031 int ret; 2032 2033 /* RX queues buffers and DMA */ 2034 for (queue = 0; queue < rx_count; queue++) { 2035 ret = __alloc_dma_rx_desc_resources(priv, queue); 2036 if (ret) 2037 goto err_dma; 2038 } 2039 2040 return 0; 2041 2042 err_dma: 2043 free_dma_rx_desc_resources(priv); 2044 2045 return ret; 2046 } 2047 2048 /** 2049 * __alloc_dma_tx_desc_resources - alloc TX resources (per queue). 2050 * @priv: private structure 2051 * @queue: TX queue index 2052 * Description: according to which descriptor can be used (extend or basic) 2053 * this function allocates the resources for TX and RX paths. In case of 2054 * reception, for example, it pre-allocated the RX socket buffer in order to 2055 * allow zero-copy mechanism. 2056 */ 2057 static int __alloc_dma_tx_desc_resources(struct stmmac_priv *priv, u32 queue) 2058 { 2059 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2060 size_t size; 2061 void *addr; 2062 2063 tx_q->queue_index = queue; 2064 tx_q->priv_data = priv; 2065 2066 tx_q->tx_skbuff_dma = kcalloc(priv->dma_tx_size, 2067 sizeof(*tx_q->tx_skbuff_dma), 2068 GFP_KERNEL); 2069 if (!tx_q->tx_skbuff_dma) 2070 return -ENOMEM; 2071 2072 tx_q->tx_skbuff = kcalloc(priv->dma_tx_size, 2073 sizeof(struct sk_buff *), 2074 GFP_KERNEL); 2075 if (!tx_q->tx_skbuff) 2076 return -ENOMEM; 2077 2078 if (priv->extend_desc) 2079 size = sizeof(struct dma_extended_desc); 2080 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 2081 size = sizeof(struct dma_edesc); 2082 else 2083 size = sizeof(struct dma_desc); 2084 2085 size *= priv->dma_tx_size; 2086 2087 addr = dma_alloc_coherent(priv->device, size, 2088 &tx_q->dma_tx_phy, GFP_KERNEL); 2089 if (!addr) 2090 return -ENOMEM; 2091 2092 if (priv->extend_desc) 2093 tx_q->dma_etx = addr; 2094 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 2095 tx_q->dma_entx = addr; 2096 else 2097 tx_q->dma_tx = addr; 2098 2099 return 0; 2100 } 2101 2102 static int alloc_dma_tx_desc_resources(struct stmmac_priv *priv) 2103 { 2104 u32 tx_count = priv->plat->tx_queues_to_use; 2105 u32 queue; 2106 int ret; 2107 2108 /* TX queues buffers and DMA */ 2109 for (queue = 0; queue < tx_count; queue++) { 2110 ret = __alloc_dma_tx_desc_resources(priv, queue); 2111 if (ret) 2112 goto err_dma; 2113 } 2114 2115 return 0; 2116 2117 err_dma: 2118 free_dma_tx_desc_resources(priv); 2119 return ret; 2120 } 2121 2122 /** 2123 * alloc_dma_desc_resources - alloc TX/RX resources. 2124 * @priv: private structure 2125 * Description: according to which descriptor can be used (extend or basic) 2126 * this function allocates the resources for TX and RX paths. In case of 2127 * reception, for example, it pre-allocated the RX socket buffer in order to 2128 * allow zero-copy mechanism. 2129 */ 2130 static int alloc_dma_desc_resources(struct stmmac_priv *priv) 2131 { 2132 /* RX Allocation */ 2133 int ret = alloc_dma_rx_desc_resources(priv); 2134 2135 if (ret) 2136 return ret; 2137 2138 ret = alloc_dma_tx_desc_resources(priv); 2139 2140 return ret; 2141 } 2142 2143 /** 2144 * free_dma_desc_resources - free dma desc resources 2145 * @priv: private structure 2146 */ 2147 static void free_dma_desc_resources(struct stmmac_priv *priv) 2148 { 2149 /* Release the DMA TX socket buffers */ 2150 free_dma_tx_desc_resources(priv); 2151 2152 /* Release the DMA RX socket buffers later 2153 * to ensure all pending XDP_TX buffers are returned. 2154 */ 2155 free_dma_rx_desc_resources(priv); 2156 } 2157 2158 /** 2159 * stmmac_mac_enable_rx_queues - Enable MAC rx queues 2160 * @priv: driver private structure 2161 * Description: It is used for enabling the rx queues in the MAC 2162 */ 2163 static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv) 2164 { 2165 u32 rx_queues_count = priv->plat->rx_queues_to_use; 2166 int queue; 2167 u8 mode; 2168 2169 for (queue = 0; queue < rx_queues_count; queue++) { 2170 mode = priv->plat->rx_queues_cfg[queue].mode_to_use; 2171 stmmac_rx_queue_enable(priv, priv->hw, mode, queue); 2172 } 2173 } 2174 2175 /** 2176 * stmmac_start_rx_dma - start RX DMA channel 2177 * @priv: driver private structure 2178 * @chan: RX channel index 2179 * Description: 2180 * This starts a RX DMA channel 2181 */ 2182 static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan) 2183 { 2184 netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan); 2185 stmmac_start_rx(priv, priv->ioaddr, chan); 2186 } 2187 2188 /** 2189 * stmmac_start_tx_dma - start TX DMA channel 2190 * @priv: driver private structure 2191 * @chan: TX channel index 2192 * Description: 2193 * This starts a TX DMA channel 2194 */ 2195 static void stmmac_start_tx_dma(struct stmmac_priv *priv, u32 chan) 2196 { 2197 netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan); 2198 stmmac_start_tx(priv, priv->ioaddr, chan); 2199 } 2200 2201 /** 2202 * stmmac_stop_rx_dma - stop RX DMA channel 2203 * @priv: driver private structure 2204 * @chan: RX channel index 2205 * Description: 2206 * This stops a RX DMA channel 2207 */ 2208 static void stmmac_stop_rx_dma(struct stmmac_priv *priv, u32 chan) 2209 { 2210 netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan); 2211 stmmac_stop_rx(priv, priv->ioaddr, chan); 2212 } 2213 2214 /** 2215 * stmmac_stop_tx_dma - stop TX DMA channel 2216 * @priv: driver private structure 2217 * @chan: TX channel index 2218 * Description: 2219 * This stops a TX DMA channel 2220 */ 2221 static void stmmac_stop_tx_dma(struct stmmac_priv *priv, u32 chan) 2222 { 2223 netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan); 2224 stmmac_stop_tx(priv, priv->ioaddr, chan); 2225 } 2226 2227 /** 2228 * stmmac_start_all_dma - start all RX and TX DMA channels 2229 * @priv: driver private structure 2230 * Description: 2231 * This starts all the RX and TX DMA channels 2232 */ 2233 static void stmmac_start_all_dma(struct stmmac_priv *priv) 2234 { 2235 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2236 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2237 u32 chan = 0; 2238 2239 for (chan = 0; chan < rx_channels_count; chan++) 2240 stmmac_start_rx_dma(priv, chan); 2241 2242 for (chan = 0; chan < tx_channels_count; chan++) 2243 stmmac_start_tx_dma(priv, chan); 2244 } 2245 2246 /** 2247 * stmmac_stop_all_dma - stop all RX and TX DMA channels 2248 * @priv: driver private structure 2249 * Description: 2250 * This stops the RX and TX DMA channels 2251 */ 2252 static void stmmac_stop_all_dma(struct stmmac_priv *priv) 2253 { 2254 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2255 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2256 u32 chan = 0; 2257 2258 for (chan = 0; chan < rx_channels_count; chan++) 2259 stmmac_stop_rx_dma(priv, chan); 2260 2261 for (chan = 0; chan < tx_channels_count; chan++) 2262 stmmac_stop_tx_dma(priv, chan); 2263 } 2264 2265 /** 2266 * stmmac_dma_operation_mode - HW DMA operation mode 2267 * @priv: driver private structure 2268 * Description: it is used for configuring the DMA operation mode register in 2269 * order to program the tx/rx DMA thresholds or Store-And-Forward mode. 2270 */ 2271 static void stmmac_dma_operation_mode(struct stmmac_priv *priv) 2272 { 2273 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2274 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2275 int rxfifosz = priv->plat->rx_fifo_size; 2276 int txfifosz = priv->plat->tx_fifo_size; 2277 u32 txmode = 0; 2278 u32 rxmode = 0; 2279 u32 chan = 0; 2280 u8 qmode = 0; 2281 2282 if (rxfifosz == 0) 2283 rxfifosz = priv->dma_cap.rx_fifo_size; 2284 if (txfifosz == 0) 2285 txfifosz = priv->dma_cap.tx_fifo_size; 2286 2287 /* Adjust for real per queue fifo size */ 2288 rxfifosz /= rx_channels_count; 2289 txfifosz /= tx_channels_count; 2290 2291 if (priv->plat->force_thresh_dma_mode) { 2292 txmode = tc; 2293 rxmode = tc; 2294 } else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) { 2295 /* 2296 * In case of GMAC, SF mode can be enabled 2297 * to perform the TX COE in HW. This depends on: 2298 * 1) TX COE if actually supported 2299 * 2) There is no bugged Jumbo frame support 2300 * that needs to not insert csum in the TDES. 2301 */ 2302 txmode = SF_DMA_MODE; 2303 rxmode = SF_DMA_MODE; 2304 priv->xstats.threshold = SF_DMA_MODE; 2305 } else { 2306 txmode = tc; 2307 rxmode = SF_DMA_MODE; 2308 } 2309 2310 /* configure all channels */ 2311 for (chan = 0; chan < rx_channels_count; chan++) { 2312 struct stmmac_rx_queue *rx_q = &priv->rx_queue[chan]; 2313 u32 buf_size; 2314 2315 qmode = priv->plat->rx_queues_cfg[chan].mode_to_use; 2316 2317 stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan, 2318 rxfifosz, qmode); 2319 2320 if (rx_q->xsk_pool) { 2321 buf_size = xsk_pool_get_rx_frame_size(rx_q->xsk_pool); 2322 stmmac_set_dma_bfsize(priv, priv->ioaddr, 2323 buf_size, 2324 chan); 2325 } else { 2326 stmmac_set_dma_bfsize(priv, priv->ioaddr, 2327 priv->dma_buf_sz, 2328 chan); 2329 } 2330 } 2331 2332 for (chan = 0; chan < tx_channels_count; chan++) { 2333 qmode = priv->plat->tx_queues_cfg[chan].mode_to_use; 2334 2335 stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan, 2336 txfifosz, qmode); 2337 } 2338 } 2339 2340 static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget) 2341 { 2342 struct netdev_queue *nq = netdev_get_tx_queue(priv->dev, queue); 2343 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2344 struct xsk_buff_pool *pool = tx_q->xsk_pool; 2345 unsigned int entry = tx_q->cur_tx; 2346 struct dma_desc *tx_desc = NULL; 2347 struct xdp_desc xdp_desc; 2348 bool work_done = true; 2349 2350 /* Avoids TX time-out as we are sharing with slow path */ 2351 nq->trans_start = jiffies; 2352 2353 budget = min(budget, stmmac_tx_avail(priv, queue)); 2354 2355 while (budget-- > 0) { 2356 dma_addr_t dma_addr; 2357 bool set_ic; 2358 2359 /* We are sharing with slow path and stop XSK TX desc submission when 2360 * available TX ring is less than threshold. 2361 */ 2362 if (unlikely(stmmac_tx_avail(priv, queue) < STMMAC_TX_XSK_AVAIL) || 2363 !netif_carrier_ok(priv->dev)) { 2364 work_done = false; 2365 break; 2366 } 2367 2368 if (!xsk_tx_peek_desc(pool, &xdp_desc)) 2369 break; 2370 2371 if (likely(priv->extend_desc)) 2372 tx_desc = (struct dma_desc *)(tx_q->dma_etx + entry); 2373 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 2374 tx_desc = &tx_q->dma_entx[entry].basic; 2375 else 2376 tx_desc = tx_q->dma_tx + entry; 2377 2378 dma_addr = xsk_buff_raw_get_dma(pool, xdp_desc.addr); 2379 xsk_buff_raw_dma_sync_for_device(pool, dma_addr, xdp_desc.len); 2380 2381 tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_XSK_TX; 2382 2383 /* To return XDP buffer to XSK pool, we simple call 2384 * xsk_tx_completed(), so we don't need to fill up 2385 * 'buf' and 'xdpf'. 2386 */ 2387 tx_q->tx_skbuff_dma[entry].buf = 0; 2388 tx_q->xdpf[entry] = NULL; 2389 2390 tx_q->tx_skbuff_dma[entry].map_as_page = false; 2391 tx_q->tx_skbuff_dma[entry].len = xdp_desc.len; 2392 tx_q->tx_skbuff_dma[entry].last_segment = true; 2393 tx_q->tx_skbuff_dma[entry].is_jumbo = false; 2394 2395 stmmac_set_desc_addr(priv, tx_desc, dma_addr); 2396 2397 tx_q->tx_count_frames++; 2398 2399 if (!priv->tx_coal_frames[queue]) 2400 set_ic = false; 2401 else if (tx_q->tx_count_frames % priv->tx_coal_frames[queue] == 0) 2402 set_ic = true; 2403 else 2404 set_ic = false; 2405 2406 if (set_ic) { 2407 tx_q->tx_count_frames = 0; 2408 stmmac_set_tx_ic(priv, tx_desc); 2409 priv->xstats.tx_set_ic_bit++; 2410 } 2411 2412 stmmac_prepare_tx_desc(priv, tx_desc, 1, xdp_desc.len, 2413 true, priv->mode, true, true, 2414 xdp_desc.len); 2415 2416 stmmac_enable_dma_transmission(priv, priv->ioaddr); 2417 2418 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, priv->dma_tx_size); 2419 entry = tx_q->cur_tx; 2420 } 2421 2422 if (tx_desc) { 2423 stmmac_flush_tx_descriptors(priv, queue); 2424 xsk_tx_release(pool); 2425 } 2426 2427 /* Return true if all of the 3 conditions are met 2428 * a) TX Budget is still available 2429 * b) work_done = true when XSK TX desc peek is empty (no more 2430 * pending XSK TX for transmission) 2431 */ 2432 return !!budget && work_done; 2433 } 2434 2435 /** 2436 * stmmac_tx_clean - to manage the transmission completion 2437 * @priv: driver private structure 2438 * @budget: napi budget limiting this functions packet handling 2439 * @queue: TX queue index 2440 * Description: it reclaims the transmit resources after transmission completes. 2441 */ 2442 static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) 2443 { 2444 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2445 unsigned int bytes_compl = 0, pkts_compl = 0; 2446 unsigned int entry, xmits = 0, count = 0; 2447 2448 __netif_tx_lock_bh(netdev_get_tx_queue(priv->dev, queue)); 2449 2450 priv->xstats.tx_clean++; 2451 2452 tx_q->xsk_frames_done = 0; 2453 2454 entry = tx_q->dirty_tx; 2455 2456 /* Try to clean all TX complete frame in 1 shot */ 2457 while ((entry != tx_q->cur_tx) && count < priv->dma_tx_size) { 2458 struct xdp_frame *xdpf; 2459 struct sk_buff *skb; 2460 struct dma_desc *p; 2461 int status; 2462 2463 if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_TX || 2464 tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_NDO) { 2465 xdpf = tx_q->xdpf[entry]; 2466 skb = NULL; 2467 } else if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_SKB) { 2468 xdpf = NULL; 2469 skb = tx_q->tx_skbuff[entry]; 2470 } else { 2471 xdpf = NULL; 2472 skb = NULL; 2473 } 2474 2475 if (priv->extend_desc) 2476 p = (struct dma_desc *)(tx_q->dma_etx + entry); 2477 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 2478 p = &tx_q->dma_entx[entry].basic; 2479 else 2480 p = tx_q->dma_tx + entry; 2481 2482 status = stmmac_tx_status(priv, &priv->dev->stats, 2483 &priv->xstats, p, priv->ioaddr); 2484 /* Check if the descriptor is owned by the DMA */ 2485 if (unlikely(status & tx_dma_own)) 2486 break; 2487 2488 count++; 2489 2490 /* Make sure descriptor fields are read after reading 2491 * the own bit. 2492 */ 2493 dma_rmb(); 2494 2495 /* Just consider the last segment and ...*/ 2496 if (likely(!(status & tx_not_ls))) { 2497 /* ... verify the status error condition */ 2498 if (unlikely(status & tx_err)) { 2499 priv->dev->stats.tx_errors++; 2500 } else { 2501 priv->dev->stats.tx_packets++; 2502 priv->xstats.tx_pkt_n++; 2503 } 2504 if (skb) 2505 stmmac_get_tx_hwtstamp(priv, p, skb); 2506 } 2507 2508 if (likely(tx_q->tx_skbuff_dma[entry].buf && 2509 tx_q->tx_skbuff_dma[entry].buf_type != STMMAC_TXBUF_T_XDP_TX)) { 2510 if (tx_q->tx_skbuff_dma[entry].map_as_page) 2511 dma_unmap_page(priv->device, 2512 tx_q->tx_skbuff_dma[entry].buf, 2513 tx_q->tx_skbuff_dma[entry].len, 2514 DMA_TO_DEVICE); 2515 else 2516 dma_unmap_single(priv->device, 2517 tx_q->tx_skbuff_dma[entry].buf, 2518 tx_q->tx_skbuff_dma[entry].len, 2519 DMA_TO_DEVICE); 2520 tx_q->tx_skbuff_dma[entry].buf = 0; 2521 tx_q->tx_skbuff_dma[entry].len = 0; 2522 tx_q->tx_skbuff_dma[entry].map_as_page = false; 2523 } 2524 2525 stmmac_clean_desc3(priv, tx_q, p); 2526 2527 tx_q->tx_skbuff_dma[entry].last_segment = false; 2528 tx_q->tx_skbuff_dma[entry].is_jumbo = false; 2529 2530 if (xdpf && 2531 tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_TX) { 2532 xdp_return_frame_rx_napi(xdpf); 2533 tx_q->xdpf[entry] = NULL; 2534 } 2535 2536 if (xdpf && 2537 tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XDP_NDO) { 2538 xdp_return_frame(xdpf); 2539 tx_q->xdpf[entry] = NULL; 2540 } 2541 2542 if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_XSK_TX) 2543 tx_q->xsk_frames_done++; 2544 2545 if (tx_q->tx_skbuff_dma[entry].buf_type == STMMAC_TXBUF_T_SKB) { 2546 if (likely(skb)) { 2547 pkts_compl++; 2548 bytes_compl += skb->len; 2549 dev_consume_skb_any(skb); 2550 tx_q->tx_skbuff[entry] = NULL; 2551 } 2552 } 2553 2554 stmmac_release_tx_desc(priv, p, priv->mode); 2555 2556 entry = STMMAC_GET_ENTRY(entry, priv->dma_tx_size); 2557 } 2558 tx_q->dirty_tx = entry; 2559 2560 netdev_tx_completed_queue(netdev_get_tx_queue(priv->dev, queue), 2561 pkts_compl, bytes_compl); 2562 2563 if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv->dev, 2564 queue))) && 2565 stmmac_tx_avail(priv, queue) > STMMAC_TX_THRESH(priv)) { 2566 2567 netif_dbg(priv, tx_done, priv->dev, 2568 "%s: restart transmit\n", __func__); 2569 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue)); 2570 } 2571 2572 if (tx_q->xsk_pool) { 2573 bool work_done; 2574 2575 if (tx_q->xsk_frames_done) 2576 xsk_tx_completed(tx_q->xsk_pool, tx_q->xsk_frames_done); 2577 2578 if (xsk_uses_need_wakeup(tx_q->xsk_pool)) 2579 xsk_set_tx_need_wakeup(tx_q->xsk_pool); 2580 2581 /* For XSK TX, we try to send as many as possible. 2582 * If XSK work done (XSK TX desc empty and budget still 2583 * available), return "budget - 1" to reenable TX IRQ. 2584 * Else, return "budget" to make NAPI continue polling. 2585 */ 2586 work_done = stmmac_xdp_xmit_zc(priv, queue, 2587 STMMAC_XSK_TX_BUDGET_MAX); 2588 if (work_done) 2589 xmits = budget - 1; 2590 else 2591 xmits = budget; 2592 } 2593 2594 if (priv->eee_enabled && !priv->tx_path_in_lpi_mode && 2595 priv->eee_sw_timer_en) { 2596 stmmac_enable_eee_mode(priv); 2597 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); 2598 } 2599 2600 /* We still have pending packets, let's call for a new scheduling */ 2601 if (tx_q->dirty_tx != tx_q->cur_tx) 2602 hrtimer_start(&tx_q->txtimer, 2603 STMMAC_COAL_TIMER(priv->tx_coal_timer[queue]), 2604 HRTIMER_MODE_REL); 2605 2606 __netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue)); 2607 2608 /* Combine decisions from TX clean and XSK TX */ 2609 return max(count, xmits); 2610 } 2611 2612 /** 2613 * stmmac_tx_err - to manage the tx error 2614 * @priv: driver private structure 2615 * @chan: channel index 2616 * Description: it cleans the descriptors and restarts the transmission 2617 * in case of transmission errors. 2618 */ 2619 static void stmmac_tx_err(struct stmmac_priv *priv, u32 chan) 2620 { 2621 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2622 2623 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, chan)); 2624 2625 stmmac_stop_tx_dma(priv, chan); 2626 dma_free_tx_skbufs(priv, chan); 2627 stmmac_clear_tx_descriptors(priv, chan); 2628 tx_q->dirty_tx = 0; 2629 tx_q->cur_tx = 0; 2630 tx_q->mss = 0; 2631 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, chan)); 2632 stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2633 tx_q->dma_tx_phy, chan); 2634 stmmac_start_tx_dma(priv, chan); 2635 2636 priv->dev->stats.tx_errors++; 2637 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, chan)); 2638 } 2639 2640 /** 2641 * stmmac_set_dma_operation_mode - Set DMA operation mode by channel 2642 * @priv: driver private structure 2643 * @txmode: TX operating mode 2644 * @rxmode: RX operating mode 2645 * @chan: channel index 2646 * Description: it is used for configuring of the DMA operation mode in 2647 * runtime in order to program the tx/rx DMA thresholds or Store-And-Forward 2648 * mode. 2649 */ 2650 static void stmmac_set_dma_operation_mode(struct stmmac_priv *priv, u32 txmode, 2651 u32 rxmode, u32 chan) 2652 { 2653 u8 rxqmode = priv->plat->rx_queues_cfg[chan].mode_to_use; 2654 u8 txqmode = priv->plat->tx_queues_cfg[chan].mode_to_use; 2655 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2656 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2657 int rxfifosz = priv->plat->rx_fifo_size; 2658 int txfifosz = priv->plat->tx_fifo_size; 2659 2660 if (rxfifosz == 0) 2661 rxfifosz = priv->dma_cap.rx_fifo_size; 2662 if (txfifosz == 0) 2663 txfifosz = priv->dma_cap.tx_fifo_size; 2664 2665 /* Adjust for real per queue fifo size */ 2666 rxfifosz /= rx_channels_count; 2667 txfifosz /= tx_channels_count; 2668 2669 stmmac_dma_rx_mode(priv, priv->ioaddr, rxmode, chan, rxfifosz, rxqmode); 2670 stmmac_dma_tx_mode(priv, priv->ioaddr, txmode, chan, txfifosz, txqmode); 2671 } 2672 2673 static bool stmmac_safety_feat_interrupt(struct stmmac_priv *priv) 2674 { 2675 int ret; 2676 2677 ret = stmmac_safety_feat_irq_status(priv, priv->dev, 2678 priv->ioaddr, priv->dma_cap.asp, &priv->sstats); 2679 if (ret && (ret != -EINVAL)) { 2680 stmmac_global_err(priv); 2681 return true; 2682 } 2683 2684 return false; 2685 } 2686 2687 static int stmmac_napi_check(struct stmmac_priv *priv, u32 chan, u32 dir) 2688 { 2689 int status = stmmac_dma_interrupt_status(priv, priv->ioaddr, 2690 &priv->xstats, chan, dir); 2691 struct stmmac_rx_queue *rx_q = &priv->rx_queue[chan]; 2692 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2693 struct stmmac_channel *ch = &priv->channel[chan]; 2694 struct napi_struct *rx_napi; 2695 struct napi_struct *tx_napi; 2696 unsigned long flags; 2697 2698 rx_napi = rx_q->xsk_pool ? &ch->rxtx_napi : &ch->rx_napi; 2699 tx_napi = tx_q->xsk_pool ? &ch->rxtx_napi : &ch->tx_napi; 2700 2701 if ((status & handle_rx) && (chan < priv->plat->rx_queues_to_use)) { 2702 if (napi_schedule_prep(rx_napi)) { 2703 spin_lock_irqsave(&ch->lock, flags); 2704 stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 0); 2705 spin_unlock_irqrestore(&ch->lock, flags); 2706 __napi_schedule(rx_napi); 2707 } 2708 } 2709 2710 if ((status & handle_tx) && (chan < priv->plat->tx_queues_to_use)) { 2711 if (napi_schedule_prep(tx_napi)) { 2712 spin_lock_irqsave(&ch->lock, flags); 2713 stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 0, 1); 2714 spin_unlock_irqrestore(&ch->lock, flags); 2715 __napi_schedule(tx_napi); 2716 } 2717 } 2718 2719 return status; 2720 } 2721 2722 /** 2723 * stmmac_dma_interrupt - DMA ISR 2724 * @priv: driver private structure 2725 * Description: this is the DMA ISR. It is called by the main ISR. 2726 * It calls the dwmac dma routine and schedule poll method in case of some 2727 * work can be done. 2728 */ 2729 static void stmmac_dma_interrupt(struct stmmac_priv *priv) 2730 { 2731 u32 tx_channel_count = priv->plat->tx_queues_to_use; 2732 u32 rx_channel_count = priv->plat->rx_queues_to_use; 2733 u32 channels_to_check = tx_channel_count > rx_channel_count ? 2734 tx_channel_count : rx_channel_count; 2735 u32 chan; 2736 int status[max_t(u32, MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES)]; 2737 2738 /* Make sure we never check beyond our status buffer. */ 2739 if (WARN_ON_ONCE(channels_to_check > ARRAY_SIZE(status))) 2740 channels_to_check = ARRAY_SIZE(status); 2741 2742 for (chan = 0; chan < channels_to_check; chan++) 2743 status[chan] = stmmac_napi_check(priv, chan, 2744 DMA_DIR_RXTX); 2745 2746 for (chan = 0; chan < tx_channel_count; chan++) { 2747 if (unlikely(status[chan] & tx_hard_error_bump_tc)) { 2748 /* Try to bump up the dma threshold on this failure */ 2749 if (unlikely(priv->xstats.threshold != SF_DMA_MODE) && 2750 (tc <= 256)) { 2751 tc += 64; 2752 if (priv->plat->force_thresh_dma_mode) 2753 stmmac_set_dma_operation_mode(priv, 2754 tc, 2755 tc, 2756 chan); 2757 else 2758 stmmac_set_dma_operation_mode(priv, 2759 tc, 2760 SF_DMA_MODE, 2761 chan); 2762 priv->xstats.threshold = tc; 2763 } 2764 } else if (unlikely(status[chan] == tx_hard_error)) { 2765 stmmac_tx_err(priv, chan); 2766 } 2767 } 2768 } 2769 2770 /** 2771 * stmmac_mmc_setup: setup the Mac Management Counters (MMC) 2772 * @priv: driver private structure 2773 * Description: this masks the MMC irq, in fact, the counters are managed in SW. 2774 */ 2775 static void stmmac_mmc_setup(struct stmmac_priv *priv) 2776 { 2777 unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET | 2778 MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET; 2779 2780 stmmac_mmc_intr_all_mask(priv, priv->mmcaddr); 2781 2782 if (priv->dma_cap.rmon) { 2783 stmmac_mmc_ctrl(priv, priv->mmcaddr, mode); 2784 memset(&priv->mmc, 0, sizeof(struct stmmac_counters)); 2785 } else 2786 netdev_info(priv->dev, "No MAC Management Counters available\n"); 2787 } 2788 2789 /** 2790 * stmmac_get_hw_features - get MAC capabilities from the HW cap. register. 2791 * @priv: driver private structure 2792 * Description: 2793 * new GMAC chip generations have a new register to indicate the 2794 * presence of the optional feature/functions. 2795 * This can be also used to override the value passed through the 2796 * platform and necessary for old MAC10/100 and GMAC chips. 2797 */ 2798 static int stmmac_get_hw_features(struct stmmac_priv *priv) 2799 { 2800 return stmmac_get_hw_feature(priv, priv->ioaddr, &priv->dma_cap) == 0; 2801 } 2802 2803 /** 2804 * stmmac_check_ether_addr - check if the MAC addr is valid 2805 * @priv: driver private structure 2806 * Description: 2807 * it is to verify if the MAC address is valid, in case of failures it 2808 * generates a random MAC address 2809 */ 2810 static void stmmac_check_ether_addr(struct stmmac_priv *priv) 2811 { 2812 if (!is_valid_ether_addr(priv->dev->dev_addr)) { 2813 stmmac_get_umac_addr(priv, priv->hw, priv->dev->dev_addr, 0); 2814 if (!is_valid_ether_addr(priv->dev->dev_addr)) 2815 eth_hw_addr_random(priv->dev); 2816 dev_info(priv->device, "device MAC address %pM\n", 2817 priv->dev->dev_addr); 2818 } 2819 } 2820 2821 /** 2822 * stmmac_init_dma_engine - DMA init. 2823 * @priv: driver private structure 2824 * Description: 2825 * It inits the DMA invoking the specific MAC/GMAC callback. 2826 * Some DMA parameters can be passed from the platform; 2827 * in case of these are not passed a default is kept for the MAC or GMAC. 2828 */ 2829 static int stmmac_init_dma_engine(struct stmmac_priv *priv) 2830 { 2831 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2832 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2833 u32 dma_csr_ch = max(rx_channels_count, tx_channels_count); 2834 struct stmmac_rx_queue *rx_q; 2835 struct stmmac_tx_queue *tx_q; 2836 u32 chan = 0; 2837 int atds = 0; 2838 int ret = 0; 2839 2840 if (!priv->plat->dma_cfg || !priv->plat->dma_cfg->pbl) { 2841 dev_err(priv->device, "Invalid DMA configuration\n"); 2842 return -EINVAL; 2843 } 2844 2845 if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE)) 2846 atds = 1; 2847 2848 ret = stmmac_reset(priv, priv->ioaddr); 2849 if (ret) { 2850 dev_err(priv->device, "Failed to reset the dma\n"); 2851 return ret; 2852 } 2853 2854 /* DMA Configuration */ 2855 stmmac_dma_init(priv, priv->ioaddr, priv->plat->dma_cfg, atds); 2856 2857 if (priv->plat->axi) 2858 stmmac_axi(priv, priv->ioaddr, priv->plat->axi); 2859 2860 /* DMA CSR Channel configuration */ 2861 for (chan = 0; chan < dma_csr_ch; chan++) 2862 stmmac_init_chan(priv, priv->ioaddr, priv->plat->dma_cfg, chan); 2863 2864 /* DMA RX Channel Configuration */ 2865 for (chan = 0; chan < rx_channels_count; chan++) { 2866 rx_q = &priv->rx_queue[chan]; 2867 2868 stmmac_init_rx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2869 rx_q->dma_rx_phy, chan); 2870 2871 rx_q->rx_tail_addr = rx_q->dma_rx_phy + 2872 (rx_q->buf_alloc_num * 2873 sizeof(struct dma_desc)); 2874 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, 2875 rx_q->rx_tail_addr, chan); 2876 } 2877 2878 /* DMA TX Channel Configuration */ 2879 for (chan = 0; chan < tx_channels_count; chan++) { 2880 tx_q = &priv->tx_queue[chan]; 2881 2882 stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 2883 tx_q->dma_tx_phy, chan); 2884 2885 tx_q->tx_tail_addr = tx_q->dma_tx_phy; 2886 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, 2887 tx_q->tx_tail_addr, chan); 2888 } 2889 2890 return ret; 2891 } 2892 2893 static void stmmac_tx_timer_arm(struct stmmac_priv *priv, u32 queue) 2894 { 2895 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 2896 2897 hrtimer_start(&tx_q->txtimer, 2898 STMMAC_COAL_TIMER(priv->tx_coal_timer[queue]), 2899 HRTIMER_MODE_REL); 2900 } 2901 2902 /** 2903 * stmmac_tx_timer - mitigation sw timer for tx. 2904 * @t: data pointer 2905 * Description: 2906 * This is the timer handler to directly invoke the stmmac_tx_clean. 2907 */ 2908 static enum hrtimer_restart stmmac_tx_timer(struct hrtimer *t) 2909 { 2910 struct stmmac_tx_queue *tx_q = container_of(t, struct stmmac_tx_queue, txtimer); 2911 struct stmmac_priv *priv = tx_q->priv_data; 2912 struct stmmac_channel *ch; 2913 struct napi_struct *napi; 2914 2915 ch = &priv->channel[tx_q->queue_index]; 2916 napi = tx_q->xsk_pool ? &ch->rxtx_napi : &ch->tx_napi; 2917 2918 if (likely(napi_schedule_prep(napi))) { 2919 unsigned long flags; 2920 2921 spin_lock_irqsave(&ch->lock, flags); 2922 stmmac_disable_dma_irq(priv, priv->ioaddr, ch->index, 0, 1); 2923 spin_unlock_irqrestore(&ch->lock, flags); 2924 __napi_schedule(napi); 2925 } 2926 2927 return HRTIMER_NORESTART; 2928 } 2929 2930 /** 2931 * stmmac_init_coalesce - init mitigation options. 2932 * @priv: driver private structure 2933 * Description: 2934 * This inits the coalesce parameters: i.e. timer rate, 2935 * timer handler and default threshold used for enabling the 2936 * interrupt on completion bit. 2937 */ 2938 static void stmmac_init_coalesce(struct stmmac_priv *priv) 2939 { 2940 u32 tx_channel_count = priv->plat->tx_queues_to_use; 2941 u32 rx_channel_count = priv->plat->rx_queues_to_use; 2942 u32 chan; 2943 2944 for (chan = 0; chan < tx_channel_count; chan++) { 2945 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 2946 2947 priv->tx_coal_frames[chan] = STMMAC_TX_FRAMES; 2948 priv->tx_coal_timer[chan] = STMMAC_COAL_TX_TIMER; 2949 2950 hrtimer_init(&tx_q->txtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 2951 tx_q->txtimer.function = stmmac_tx_timer; 2952 } 2953 2954 for (chan = 0; chan < rx_channel_count; chan++) 2955 priv->rx_coal_frames[chan] = STMMAC_RX_FRAMES; 2956 } 2957 2958 static void stmmac_set_rings_length(struct stmmac_priv *priv) 2959 { 2960 u32 rx_channels_count = priv->plat->rx_queues_to_use; 2961 u32 tx_channels_count = priv->plat->tx_queues_to_use; 2962 u32 chan; 2963 2964 /* set TX ring length */ 2965 for (chan = 0; chan < tx_channels_count; chan++) 2966 stmmac_set_tx_ring_len(priv, priv->ioaddr, 2967 (priv->dma_tx_size - 1), chan); 2968 2969 /* set RX ring length */ 2970 for (chan = 0; chan < rx_channels_count; chan++) 2971 stmmac_set_rx_ring_len(priv, priv->ioaddr, 2972 (priv->dma_rx_size - 1), chan); 2973 } 2974 2975 /** 2976 * stmmac_set_tx_queue_weight - Set TX queue weight 2977 * @priv: driver private structure 2978 * Description: It is used for setting TX queues weight 2979 */ 2980 static void stmmac_set_tx_queue_weight(struct stmmac_priv *priv) 2981 { 2982 u32 tx_queues_count = priv->plat->tx_queues_to_use; 2983 u32 weight; 2984 u32 queue; 2985 2986 for (queue = 0; queue < tx_queues_count; queue++) { 2987 weight = priv->plat->tx_queues_cfg[queue].weight; 2988 stmmac_set_mtl_tx_queue_weight(priv, priv->hw, weight, queue); 2989 } 2990 } 2991 2992 /** 2993 * stmmac_configure_cbs - Configure CBS in TX queue 2994 * @priv: driver private structure 2995 * Description: It is used for configuring CBS in AVB TX queues 2996 */ 2997 static void stmmac_configure_cbs(struct stmmac_priv *priv) 2998 { 2999 u32 tx_queues_count = priv->plat->tx_queues_to_use; 3000 u32 mode_to_use; 3001 u32 queue; 3002 3003 /* queue 0 is reserved for legacy traffic */ 3004 for (queue = 1; queue < tx_queues_count; queue++) { 3005 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use; 3006 if (mode_to_use == MTL_QUEUE_DCB) 3007 continue; 3008 3009 stmmac_config_cbs(priv, priv->hw, 3010 priv->plat->tx_queues_cfg[queue].send_slope, 3011 priv->plat->tx_queues_cfg[queue].idle_slope, 3012 priv->plat->tx_queues_cfg[queue].high_credit, 3013 priv->plat->tx_queues_cfg[queue].low_credit, 3014 queue); 3015 } 3016 } 3017 3018 /** 3019 * stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel 3020 * @priv: driver private structure 3021 * Description: It is used for mapping RX queues to RX dma channels 3022 */ 3023 static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv *priv) 3024 { 3025 u32 rx_queues_count = priv->plat->rx_queues_to_use; 3026 u32 queue; 3027 u32 chan; 3028 3029 for (queue = 0; queue < rx_queues_count; queue++) { 3030 chan = priv->plat->rx_queues_cfg[queue].chan; 3031 stmmac_map_mtl_to_dma(priv, priv->hw, queue, chan); 3032 } 3033 } 3034 3035 /** 3036 * stmmac_mac_config_rx_queues_prio - Configure RX Queue priority 3037 * @priv: driver private structure 3038 * Description: It is used for configuring the RX Queue Priority 3039 */ 3040 static void stmmac_mac_config_rx_queues_prio(struct stmmac_priv *priv) 3041 { 3042 u32 rx_queues_count = priv->plat->rx_queues_to_use; 3043 u32 queue; 3044 u32 prio; 3045 3046 for (queue = 0; queue < rx_queues_count; queue++) { 3047 if (!priv->plat->rx_queues_cfg[queue].use_prio) 3048 continue; 3049 3050 prio = priv->plat->rx_queues_cfg[queue].prio; 3051 stmmac_rx_queue_prio(priv, priv->hw, prio, queue); 3052 } 3053 } 3054 3055 /** 3056 * stmmac_mac_config_tx_queues_prio - Configure TX Queue priority 3057 * @priv: driver private structure 3058 * Description: It is used for configuring the TX Queue Priority 3059 */ 3060 static void stmmac_mac_config_tx_queues_prio(struct stmmac_priv *priv) 3061 { 3062 u32 tx_queues_count = priv->plat->tx_queues_to_use; 3063 u32 queue; 3064 u32 prio; 3065 3066 for (queue = 0; queue < tx_queues_count; queue++) { 3067 if (!priv->plat->tx_queues_cfg[queue].use_prio) 3068 continue; 3069 3070 prio = priv->plat->tx_queues_cfg[queue].prio; 3071 stmmac_tx_queue_prio(priv, priv->hw, prio, queue); 3072 } 3073 } 3074 3075 /** 3076 * stmmac_mac_config_rx_queues_routing - Configure RX Queue Routing 3077 * @priv: driver private structure 3078 * Description: It is used for configuring the RX queue routing 3079 */ 3080 static void stmmac_mac_config_rx_queues_routing(struct stmmac_priv *priv) 3081 { 3082 u32 rx_queues_count = priv->plat->rx_queues_to_use; 3083 u32 queue; 3084 u8 packet; 3085 3086 for (queue = 0; queue < rx_queues_count; queue++) { 3087 /* no specific packet type routing specified for the queue */ 3088 if (priv->plat->rx_queues_cfg[queue].pkt_route == 0x0) 3089 continue; 3090 3091 packet = priv->plat->rx_queues_cfg[queue].pkt_route; 3092 stmmac_rx_queue_routing(priv, priv->hw, packet, queue); 3093 } 3094 } 3095 3096 static void stmmac_mac_config_rss(struct stmmac_priv *priv) 3097 { 3098 if (!priv->dma_cap.rssen || !priv->plat->rss_en) { 3099 priv->rss.enable = false; 3100 return; 3101 } 3102 3103 if (priv->dev->features & NETIF_F_RXHASH) 3104 priv->rss.enable = true; 3105 else 3106 priv->rss.enable = false; 3107 3108 stmmac_rss_configure(priv, priv->hw, &priv->rss, 3109 priv->plat->rx_queues_to_use); 3110 } 3111 3112 /** 3113 * stmmac_mtl_configuration - Configure MTL 3114 * @priv: driver private structure 3115 * Description: It is used for configurring MTL 3116 */ 3117 static void stmmac_mtl_configuration(struct stmmac_priv *priv) 3118 { 3119 u32 rx_queues_count = priv->plat->rx_queues_to_use; 3120 u32 tx_queues_count = priv->plat->tx_queues_to_use; 3121 3122 if (tx_queues_count > 1) 3123 stmmac_set_tx_queue_weight(priv); 3124 3125 /* Configure MTL RX algorithms */ 3126 if (rx_queues_count > 1) 3127 stmmac_prog_mtl_rx_algorithms(priv, priv->hw, 3128 priv->plat->rx_sched_algorithm); 3129 3130 /* Configure MTL TX algorithms */ 3131 if (tx_queues_count > 1) 3132 stmmac_prog_mtl_tx_algorithms(priv, priv->hw, 3133 priv->plat->tx_sched_algorithm); 3134 3135 /* Configure CBS in AVB TX queues */ 3136 if (tx_queues_count > 1) 3137 stmmac_configure_cbs(priv); 3138 3139 /* Map RX MTL to DMA channels */ 3140 stmmac_rx_queue_dma_chan_map(priv); 3141 3142 /* Enable MAC RX Queues */ 3143 stmmac_mac_enable_rx_queues(priv); 3144 3145 /* Set RX priorities */ 3146 if (rx_queues_count > 1) 3147 stmmac_mac_config_rx_queues_prio(priv); 3148 3149 /* Set TX priorities */ 3150 if (tx_queues_count > 1) 3151 stmmac_mac_config_tx_queues_prio(priv); 3152 3153 /* Set RX routing */ 3154 if (rx_queues_count > 1) 3155 stmmac_mac_config_rx_queues_routing(priv); 3156 3157 /* Receive Side Scaling */ 3158 if (rx_queues_count > 1) 3159 stmmac_mac_config_rss(priv); 3160 } 3161 3162 static void stmmac_safety_feat_configuration(struct stmmac_priv *priv) 3163 { 3164 if (priv->dma_cap.asp) { 3165 netdev_info(priv->dev, "Enabling Safety Features\n"); 3166 stmmac_safety_feat_config(priv, priv->ioaddr, priv->dma_cap.asp, 3167 priv->plat->safety_feat_cfg); 3168 } else { 3169 netdev_info(priv->dev, "No Safety Features support found\n"); 3170 } 3171 } 3172 3173 static int stmmac_fpe_start_wq(struct stmmac_priv *priv) 3174 { 3175 char *name; 3176 3177 clear_bit(__FPE_TASK_SCHED, &priv->fpe_task_state); 3178 clear_bit(__FPE_REMOVING, &priv->fpe_task_state); 3179 3180 name = priv->wq_name; 3181 sprintf(name, "%s-fpe", priv->dev->name); 3182 3183 priv->fpe_wq = create_singlethread_workqueue(name); 3184 if (!priv->fpe_wq) { 3185 netdev_err(priv->dev, "%s: Failed to create workqueue\n", name); 3186 3187 return -ENOMEM; 3188 } 3189 netdev_info(priv->dev, "FPE workqueue start"); 3190 3191 return 0; 3192 } 3193 3194 /** 3195 * stmmac_hw_setup - setup mac in a usable state. 3196 * @dev : pointer to the device structure. 3197 * @init_ptp: initialize PTP if set 3198 * Description: 3199 * this is the main function to setup the HW in a usable state because the 3200 * dma engine is reset, the core registers are configured (e.g. AXI, 3201 * Checksum features, timers). The DMA is ready to start receiving and 3202 * transmitting. 3203 * Return value: 3204 * 0 on success and an appropriate (-)ve integer as defined in errno.h 3205 * file on failure. 3206 */ 3207 static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) 3208 { 3209 struct stmmac_priv *priv = netdev_priv(dev); 3210 u32 rx_cnt = priv->plat->rx_queues_to_use; 3211 u32 tx_cnt = priv->plat->tx_queues_to_use; 3212 bool sph_en; 3213 u32 chan; 3214 int ret; 3215 3216 /* DMA initialization and SW reset */ 3217 ret = stmmac_init_dma_engine(priv); 3218 if (ret < 0) { 3219 netdev_err(priv->dev, "%s: DMA engine initialization failed\n", 3220 __func__); 3221 return ret; 3222 } 3223 3224 /* Copy the MAC addr into the HW */ 3225 stmmac_set_umac_addr(priv, priv->hw, dev->dev_addr, 0); 3226 3227 /* PS and related bits will be programmed according to the speed */ 3228 if (priv->hw->pcs) { 3229 int speed = priv->plat->mac_port_sel_speed; 3230 3231 if ((speed == SPEED_10) || (speed == SPEED_100) || 3232 (speed == SPEED_1000)) { 3233 priv->hw->ps = speed; 3234 } else { 3235 dev_warn(priv->device, "invalid port speed\n"); 3236 priv->hw->ps = 0; 3237 } 3238 } 3239 3240 /* Initialize the MAC Core */ 3241 stmmac_core_init(priv, priv->hw, dev); 3242 3243 /* Initialize MTL*/ 3244 stmmac_mtl_configuration(priv); 3245 3246 /* Initialize Safety Features */ 3247 stmmac_safety_feat_configuration(priv); 3248 3249 ret = stmmac_rx_ipc(priv, priv->hw); 3250 if (!ret) { 3251 netdev_warn(priv->dev, "RX IPC Checksum Offload disabled\n"); 3252 priv->plat->rx_coe = STMMAC_RX_COE_NONE; 3253 priv->hw->rx_csum = 0; 3254 } 3255 3256 /* Enable the MAC Rx/Tx */ 3257 stmmac_mac_set(priv, priv->ioaddr, true); 3258 3259 /* Set the HW DMA mode and the COE */ 3260 stmmac_dma_operation_mode(priv); 3261 3262 stmmac_mmc_setup(priv); 3263 3264 if (init_ptp) { 3265 ret = clk_prepare_enable(priv->plat->clk_ptp_ref); 3266 if (ret < 0) 3267 netdev_warn(priv->dev, "failed to enable PTP reference clock: %d\n", ret); 3268 3269 ret = stmmac_init_ptp(priv); 3270 if (ret == -EOPNOTSUPP) 3271 netdev_warn(priv->dev, "PTP not supported by HW\n"); 3272 else if (ret) 3273 netdev_warn(priv->dev, "PTP init failed\n"); 3274 } 3275 3276 priv->eee_tw_timer = STMMAC_DEFAULT_TWT_LS; 3277 3278 /* Convert the timer from msec to usec */ 3279 if (!priv->tx_lpi_timer) 3280 priv->tx_lpi_timer = eee_timer * 1000; 3281 3282 if (priv->use_riwt) { 3283 u32 queue; 3284 3285 for (queue = 0; queue < rx_cnt; queue++) { 3286 if (!priv->rx_riwt[queue]) 3287 priv->rx_riwt[queue] = DEF_DMA_RIWT; 3288 3289 stmmac_rx_watchdog(priv, priv->ioaddr, 3290 priv->rx_riwt[queue], queue); 3291 } 3292 } 3293 3294 if (priv->hw->pcs) 3295 stmmac_pcs_ctrl_ane(priv, priv->ioaddr, 1, priv->hw->ps, 0); 3296 3297 /* set TX and RX rings length */ 3298 stmmac_set_rings_length(priv); 3299 3300 /* Enable TSO */ 3301 if (priv->tso) { 3302 for (chan = 0; chan < tx_cnt; chan++) { 3303 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 3304 3305 /* TSO and TBS cannot co-exist */ 3306 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3307 continue; 3308 3309 stmmac_enable_tso(priv, priv->ioaddr, 1, chan); 3310 } 3311 } 3312 3313 /* Enable Split Header */ 3314 sph_en = (priv->hw->rx_csum > 0) && priv->sph; 3315 for (chan = 0; chan < rx_cnt; chan++) 3316 stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan); 3317 3318 3319 /* VLAN Tag Insertion */ 3320 if (priv->dma_cap.vlins) 3321 stmmac_enable_vlan(priv, priv->hw, STMMAC_VLAN_INSERT); 3322 3323 /* TBS */ 3324 for (chan = 0; chan < tx_cnt; chan++) { 3325 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 3326 int enable = tx_q->tbs & STMMAC_TBS_AVAIL; 3327 3328 stmmac_enable_tbs(priv, priv->ioaddr, enable, chan); 3329 } 3330 3331 /* Configure real RX and TX queues */ 3332 netif_set_real_num_rx_queues(dev, priv->plat->rx_queues_to_use); 3333 netif_set_real_num_tx_queues(dev, priv->plat->tx_queues_to_use); 3334 3335 /* Start the ball rolling... */ 3336 stmmac_start_all_dma(priv); 3337 3338 if (priv->dma_cap.fpesel) { 3339 stmmac_fpe_start_wq(priv); 3340 3341 if (priv->plat->fpe_cfg->enable) 3342 stmmac_fpe_handshake(priv, true); 3343 } 3344 3345 return 0; 3346 } 3347 3348 static void stmmac_hw_teardown(struct net_device *dev) 3349 { 3350 struct stmmac_priv *priv = netdev_priv(dev); 3351 3352 clk_disable_unprepare(priv->plat->clk_ptp_ref); 3353 } 3354 3355 static void stmmac_free_irq(struct net_device *dev, 3356 enum request_irq_err irq_err, int irq_idx) 3357 { 3358 struct stmmac_priv *priv = netdev_priv(dev); 3359 int j; 3360 3361 switch (irq_err) { 3362 case REQ_IRQ_ERR_ALL: 3363 irq_idx = priv->plat->tx_queues_to_use; 3364 fallthrough; 3365 case REQ_IRQ_ERR_TX: 3366 for (j = irq_idx - 1; j >= 0; j--) { 3367 if (priv->tx_irq[j] > 0) { 3368 irq_set_affinity_hint(priv->tx_irq[j], NULL); 3369 free_irq(priv->tx_irq[j], &priv->tx_queue[j]); 3370 } 3371 } 3372 irq_idx = priv->plat->rx_queues_to_use; 3373 fallthrough; 3374 case REQ_IRQ_ERR_RX: 3375 for (j = irq_idx - 1; j >= 0; j--) { 3376 if (priv->rx_irq[j] > 0) { 3377 irq_set_affinity_hint(priv->rx_irq[j], NULL); 3378 free_irq(priv->rx_irq[j], &priv->rx_queue[j]); 3379 } 3380 } 3381 3382 if (priv->sfty_ue_irq > 0 && priv->sfty_ue_irq != dev->irq) 3383 free_irq(priv->sfty_ue_irq, dev); 3384 fallthrough; 3385 case REQ_IRQ_ERR_SFTY_UE: 3386 if (priv->sfty_ce_irq > 0 && priv->sfty_ce_irq != dev->irq) 3387 free_irq(priv->sfty_ce_irq, dev); 3388 fallthrough; 3389 case REQ_IRQ_ERR_SFTY_CE: 3390 if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq) 3391 free_irq(priv->lpi_irq, dev); 3392 fallthrough; 3393 case REQ_IRQ_ERR_LPI: 3394 if (priv->wol_irq > 0 && priv->wol_irq != dev->irq) 3395 free_irq(priv->wol_irq, dev); 3396 fallthrough; 3397 case REQ_IRQ_ERR_WOL: 3398 free_irq(dev->irq, dev); 3399 fallthrough; 3400 case REQ_IRQ_ERR_MAC: 3401 case REQ_IRQ_ERR_NO: 3402 /* If MAC IRQ request error, no more IRQ to free */ 3403 break; 3404 } 3405 } 3406 3407 static int stmmac_request_irq_multi_msi(struct net_device *dev) 3408 { 3409 struct stmmac_priv *priv = netdev_priv(dev); 3410 enum request_irq_err irq_err; 3411 cpumask_t cpu_mask; 3412 int irq_idx = 0; 3413 char *int_name; 3414 int ret; 3415 int i; 3416 3417 /* For common interrupt */ 3418 int_name = priv->int_name_mac; 3419 sprintf(int_name, "%s:%s", dev->name, "mac"); 3420 ret = request_irq(dev->irq, stmmac_mac_interrupt, 3421 0, int_name, dev); 3422 if (unlikely(ret < 0)) { 3423 netdev_err(priv->dev, 3424 "%s: alloc mac MSI %d (error: %d)\n", 3425 __func__, dev->irq, ret); 3426 irq_err = REQ_IRQ_ERR_MAC; 3427 goto irq_error; 3428 } 3429 3430 /* Request the Wake IRQ in case of another line 3431 * is used for WoL 3432 */ 3433 if (priv->wol_irq > 0 && priv->wol_irq != dev->irq) { 3434 int_name = priv->int_name_wol; 3435 sprintf(int_name, "%s:%s", dev->name, "wol"); 3436 ret = request_irq(priv->wol_irq, 3437 stmmac_mac_interrupt, 3438 0, int_name, dev); 3439 if (unlikely(ret < 0)) { 3440 netdev_err(priv->dev, 3441 "%s: alloc wol MSI %d (error: %d)\n", 3442 __func__, priv->wol_irq, ret); 3443 irq_err = REQ_IRQ_ERR_WOL; 3444 goto irq_error; 3445 } 3446 } 3447 3448 /* Request the LPI IRQ in case of another line 3449 * is used for LPI 3450 */ 3451 if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq) { 3452 int_name = priv->int_name_lpi; 3453 sprintf(int_name, "%s:%s", dev->name, "lpi"); 3454 ret = request_irq(priv->lpi_irq, 3455 stmmac_mac_interrupt, 3456 0, int_name, dev); 3457 if (unlikely(ret < 0)) { 3458 netdev_err(priv->dev, 3459 "%s: alloc lpi MSI %d (error: %d)\n", 3460 __func__, priv->lpi_irq, ret); 3461 irq_err = REQ_IRQ_ERR_LPI; 3462 goto irq_error; 3463 } 3464 } 3465 3466 /* Request the Safety Feature Correctible Error line in 3467 * case of another line is used 3468 */ 3469 if (priv->sfty_ce_irq > 0 && priv->sfty_ce_irq != dev->irq) { 3470 int_name = priv->int_name_sfty_ce; 3471 sprintf(int_name, "%s:%s", dev->name, "safety-ce"); 3472 ret = request_irq(priv->sfty_ce_irq, 3473 stmmac_safety_interrupt, 3474 0, int_name, dev); 3475 if (unlikely(ret < 0)) { 3476 netdev_err(priv->dev, 3477 "%s: alloc sfty ce MSI %d (error: %d)\n", 3478 __func__, priv->sfty_ce_irq, ret); 3479 irq_err = REQ_IRQ_ERR_SFTY_CE; 3480 goto irq_error; 3481 } 3482 } 3483 3484 /* Request the Safety Feature Uncorrectible Error line in 3485 * case of another line is used 3486 */ 3487 if (priv->sfty_ue_irq > 0 && priv->sfty_ue_irq != dev->irq) { 3488 int_name = priv->int_name_sfty_ue; 3489 sprintf(int_name, "%s:%s", dev->name, "safety-ue"); 3490 ret = request_irq(priv->sfty_ue_irq, 3491 stmmac_safety_interrupt, 3492 0, int_name, dev); 3493 if (unlikely(ret < 0)) { 3494 netdev_err(priv->dev, 3495 "%s: alloc sfty ue MSI %d (error: %d)\n", 3496 __func__, priv->sfty_ue_irq, ret); 3497 irq_err = REQ_IRQ_ERR_SFTY_UE; 3498 goto irq_error; 3499 } 3500 } 3501 3502 /* Request Rx MSI irq */ 3503 for (i = 0; i < priv->plat->rx_queues_to_use; i++) { 3504 if (priv->rx_irq[i] == 0) 3505 continue; 3506 3507 int_name = priv->int_name_rx_irq[i]; 3508 sprintf(int_name, "%s:%s-%d", dev->name, "rx", i); 3509 ret = request_irq(priv->rx_irq[i], 3510 stmmac_msi_intr_rx, 3511 0, int_name, &priv->rx_queue[i]); 3512 if (unlikely(ret < 0)) { 3513 netdev_err(priv->dev, 3514 "%s: alloc rx-%d MSI %d (error: %d)\n", 3515 __func__, i, priv->rx_irq[i], ret); 3516 irq_err = REQ_IRQ_ERR_RX; 3517 irq_idx = i; 3518 goto irq_error; 3519 } 3520 cpumask_clear(&cpu_mask); 3521 cpumask_set_cpu(i % num_online_cpus(), &cpu_mask); 3522 irq_set_affinity_hint(priv->rx_irq[i], &cpu_mask); 3523 } 3524 3525 /* Request Tx MSI irq */ 3526 for (i = 0; i < priv->plat->tx_queues_to_use; i++) { 3527 if (priv->tx_irq[i] == 0) 3528 continue; 3529 3530 int_name = priv->int_name_tx_irq[i]; 3531 sprintf(int_name, "%s:%s-%d", dev->name, "tx", i); 3532 ret = request_irq(priv->tx_irq[i], 3533 stmmac_msi_intr_tx, 3534 0, int_name, &priv->tx_queue[i]); 3535 if (unlikely(ret < 0)) { 3536 netdev_err(priv->dev, 3537 "%s: alloc tx-%d MSI %d (error: %d)\n", 3538 __func__, i, priv->tx_irq[i], ret); 3539 irq_err = REQ_IRQ_ERR_TX; 3540 irq_idx = i; 3541 goto irq_error; 3542 } 3543 cpumask_clear(&cpu_mask); 3544 cpumask_set_cpu(i % num_online_cpus(), &cpu_mask); 3545 irq_set_affinity_hint(priv->tx_irq[i], &cpu_mask); 3546 } 3547 3548 return 0; 3549 3550 irq_error: 3551 stmmac_free_irq(dev, irq_err, irq_idx); 3552 return ret; 3553 } 3554 3555 static int stmmac_request_irq_single(struct net_device *dev) 3556 { 3557 struct stmmac_priv *priv = netdev_priv(dev); 3558 enum request_irq_err irq_err; 3559 int ret; 3560 3561 ret = request_irq(dev->irq, stmmac_interrupt, 3562 IRQF_SHARED, dev->name, dev); 3563 if (unlikely(ret < 0)) { 3564 netdev_err(priv->dev, 3565 "%s: ERROR: allocating the IRQ %d (error: %d)\n", 3566 __func__, dev->irq, ret); 3567 irq_err = REQ_IRQ_ERR_MAC; 3568 goto irq_error; 3569 } 3570 3571 /* Request the Wake IRQ in case of another line 3572 * is used for WoL 3573 */ 3574 if (priv->wol_irq > 0 && priv->wol_irq != dev->irq) { 3575 ret = request_irq(priv->wol_irq, stmmac_interrupt, 3576 IRQF_SHARED, dev->name, dev); 3577 if (unlikely(ret < 0)) { 3578 netdev_err(priv->dev, 3579 "%s: ERROR: allocating the WoL IRQ %d (%d)\n", 3580 __func__, priv->wol_irq, ret); 3581 irq_err = REQ_IRQ_ERR_WOL; 3582 goto irq_error; 3583 } 3584 } 3585 3586 /* Request the IRQ lines */ 3587 if (priv->lpi_irq > 0 && priv->lpi_irq != dev->irq) { 3588 ret = request_irq(priv->lpi_irq, stmmac_interrupt, 3589 IRQF_SHARED, dev->name, dev); 3590 if (unlikely(ret < 0)) { 3591 netdev_err(priv->dev, 3592 "%s: ERROR: allocating the LPI IRQ %d (%d)\n", 3593 __func__, priv->lpi_irq, ret); 3594 irq_err = REQ_IRQ_ERR_LPI; 3595 goto irq_error; 3596 } 3597 } 3598 3599 return 0; 3600 3601 irq_error: 3602 stmmac_free_irq(dev, irq_err, 0); 3603 return ret; 3604 } 3605 3606 static int stmmac_request_irq(struct net_device *dev) 3607 { 3608 struct stmmac_priv *priv = netdev_priv(dev); 3609 int ret; 3610 3611 /* Request the IRQ lines */ 3612 if (priv->plat->multi_msi_en) 3613 ret = stmmac_request_irq_multi_msi(dev); 3614 else 3615 ret = stmmac_request_irq_single(dev); 3616 3617 return ret; 3618 } 3619 3620 /** 3621 * stmmac_open - open entry point of the driver 3622 * @dev : pointer to the device structure. 3623 * Description: 3624 * This function is the open entry point of the driver. 3625 * Return value: 3626 * 0 on success and an appropriate (-)ve integer as defined in errno.h 3627 * file on failure. 3628 */ 3629 int stmmac_open(struct net_device *dev) 3630 { 3631 struct stmmac_priv *priv = netdev_priv(dev); 3632 int mode = priv->plat->phy_interface; 3633 int bfsize = 0; 3634 u32 chan; 3635 int ret; 3636 3637 ret = pm_runtime_get_sync(priv->device); 3638 if (ret < 0) { 3639 pm_runtime_put_noidle(priv->device); 3640 return ret; 3641 } 3642 3643 if (priv->hw->pcs != STMMAC_PCS_TBI && 3644 priv->hw->pcs != STMMAC_PCS_RTBI && 3645 (!priv->hw->xpcs || 3646 xpcs_get_an_mode(priv->hw->xpcs, mode) != DW_AN_C73)) { 3647 ret = stmmac_init_phy(dev); 3648 if (ret) { 3649 netdev_err(priv->dev, 3650 "%s: Cannot attach to PHY (error: %d)\n", 3651 __func__, ret); 3652 goto init_phy_error; 3653 } 3654 } 3655 3656 /* Extra statistics */ 3657 memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats)); 3658 priv->xstats.threshold = tc; 3659 3660 bfsize = stmmac_set_16kib_bfsize(priv, dev->mtu); 3661 if (bfsize < 0) 3662 bfsize = 0; 3663 3664 if (bfsize < BUF_SIZE_16KiB) 3665 bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz); 3666 3667 priv->dma_buf_sz = bfsize; 3668 buf_sz = bfsize; 3669 3670 priv->rx_copybreak = STMMAC_RX_COPYBREAK; 3671 3672 if (!priv->dma_tx_size) 3673 priv->dma_tx_size = DMA_DEFAULT_TX_SIZE; 3674 if (!priv->dma_rx_size) 3675 priv->dma_rx_size = DMA_DEFAULT_RX_SIZE; 3676 3677 /* Earlier check for TBS */ 3678 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) { 3679 struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan]; 3680 int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en; 3681 3682 /* Setup per-TXQ tbs flag before TX descriptor alloc */ 3683 tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0; 3684 } 3685 3686 ret = alloc_dma_desc_resources(priv); 3687 if (ret < 0) { 3688 netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n", 3689 __func__); 3690 goto dma_desc_error; 3691 } 3692 3693 ret = init_dma_desc_rings(dev, GFP_KERNEL); 3694 if (ret < 0) { 3695 netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n", 3696 __func__); 3697 goto init_error; 3698 } 3699 3700 ret = stmmac_hw_setup(dev, true); 3701 if (ret < 0) { 3702 netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); 3703 goto init_error; 3704 } 3705 3706 stmmac_init_coalesce(priv); 3707 3708 phylink_start(priv->phylink); 3709 /* We may have called phylink_speed_down before */ 3710 phylink_speed_up(priv->phylink); 3711 3712 ret = stmmac_request_irq(dev); 3713 if (ret) 3714 goto irq_error; 3715 3716 stmmac_enable_all_queues(priv); 3717 netif_tx_start_all_queues(priv->dev); 3718 3719 return 0; 3720 3721 irq_error: 3722 phylink_stop(priv->phylink); 3723 3724 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 3725 hrtimer_cancel(&priv->tx_queue[chan].txtimer); 3726 3727 stmmac_hw_teardown(dev); 3728 init_error: 3729 free_dma_desc_resources(priv); 3730 dma_desc_error: 3731 phylink_disconnect_phy(priv->phylink); 3732 init_phy_error: 3733 pm_runtime_put(priv->device); 3734 return ret; 3735 } 3736 3737 static void stmmac_fpe_stop_wq(struct stmmac_priv *priv) 3738 { 3739 set_bit(__FPE_REMOVING, &priv->fpe_task_state); 3740 3741 if (priv->fpe_wq) 3742 destroy_workqueue(priv->fpe_wq); 3743 3744 netdev_info(priv->dev, "FPE workqueue stop"); 3745 } 3746 3747 /** 3748 * stmmac_release - close entry point of the driver 3749 * @dev : device pointer. 3750 * Description: 3751 * This is the stop entry point of the driver. 3752 */ 3753 int stmmac_release(struct net_device *dev) 3754 { 3755 struct stmmac_priv *priv = netdev_priv(dev); 3756 u32 chan; 3757 3758 if (device_may_wakeup(priv->device)) 3759 phylink_speed_down(priv->phylink, false); 3760 /* Stop and disconnect the PHY */ 3761 phylink_stop(priv->phylink); 3762 phylink_disconnect_phy(priv->phylink); 3763 3764 stmmac_disable_all_queues(priv); 3765 3766 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 3767 hrtimer_cancel(&priv->tx_queue[chan].txtimer); 3768 3769 /* Free the IRQ lines */ 3770 stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0); 3771 3772 if (priv->eee_enabled) { 3773 priv->tx_path_in_lpi_mode = false; 3774 del_timer_sync(&priv->eee_ctrl_timer); 3775 } 3776 3777 /* Stop TX/RX DMA and clear the descriptors */ 3778 stmmac_stop_all_dma(priv); 3779 3780 /* Release and free the Rx/Tx resources */ 3781 free_dma_desc_resources(priv); 3782 3783 /* Disable the MAC Rx/Tx */ 3784 stmmac_mac_set(priv, priv->ioaddr, false); 3785 3786 netif_carrier_off(dev); 3787 3788 stmmac_release_ptp(priv); 3789 3790 pm_runtime_put(priv->device); 3791 3792 if (priv->dma_cap.fpesel) 3793 stmmac_fpe_stop_wq(priv); 3794 3795 return 0; 3796 } 3797 3798 static bool stmmac_vlan_insert(struct stmmac_priv *priv, struct sk_buff *skb, 3799 struct stmmac_tx_queue *tx_q) 3800 { 3801 u16 tag = 0x0, inner_tag = 0x0; 3802 u32 inner_type = 0x0; 3803 struct dma_desc *p; 3804 3805 if (!priv->dma_cap.vlins) 3806 return false; 3807 if (!skb_vlan_tag_present(skb)) 3808 return false; 3809 if (skb->vlan_proto == htons(ETH_P_8021AD)) { 3810 inner_tag = skb_vlan_tag_get(skb); 3811 inner_type = STMMAC_VLAN_INSERT; 3812 } 3813 3814 tag = skb_vlan_tag_get(skb); 3815 3816 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3817 p = &tx_q->dma_entx[tx_q->cur_tx].basic; 3818 else 3819 p = &tx_q->dma_tx[tx_q->cur_tx]; 3820 3821 if (stmmac_set_desc_vlan_tag(priv, p, tag, inner_tag, inner_type)) 3822 return false; 3823 3824 stmmac_set_tx_owner(priv, p); 3825 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, priv->dma_tx_size); 3826 return true; 3827 } 3828 3829 /** 3830 * stmmac_tso_allocator - close entry point of the driver 3831 * @priv: driver private structure 3832 * @des: buffer start address 3833 * @total_len: total length to fill in descriptors 3834 * @last_segment: condition for the last descriptor 3835 * @queue: TX queue index 3836 * Description: 3837 * This function fills descriptor and request new descriptors according to 3838 * buffer length to fill 3839 */ 3840 static void stmmac_tso_allocator(struct stmmac_priv *priv, dma_addr_t des, 3841 int total_len, bool last_segment, u32 queue) 3842 { 3843 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 3844 struct dma_desc *desc; 3845 u32 buff_size; 3846 int tmp_len; 3847 3848 tmp_len = total_len; 3849 3850 while (tmp_len > 0) { 3851 dma_addr_t curr_addr; 3852 3853 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, 3854 priv->dma_tx_size); 3855 WARN_ON(tx_q->tx_skbuff[tx_q->cur_tx]); 3856 3857 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3858 desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 3859 else 3860 desc = &tx_q->dma_tx[tx_q->cur_tx]; 3861 3862 curr_addr = des + (total_len - tmp_len); 3863 if (priv->dma_cap.addr64 <= 32) 3864 desc->des0 = cpu_to_le32(curr_addr); 3865 else 3866 stmmac_set_desc_addr(priv, desc, curr_addr); 3867 3868 buff_size = tmp_len >= TSO_MAX_BUFF_SIZE ? 3869 TSO_MAX_BUFF_SIZE : tmp_len; 3870 3871 stmmac_prepare_tso_tx_desc(priv, desc, 0, buff_size, 3872 0, 1, 3873 (last_segment) && (tmp_len <= TSO_MAX_BUFF_SIZE), 3874 0, 0); 3875 3876 tmp_len -= TSO_MAX_BUFF_SIZE; 3877 } 3878 } 3879 3880 static void stmmac_flush_tx_descriptors(struct stmmac_priv *priv, int queue) 3881 { 3882 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 3883 int desc_size; 3884 3885 if (likely(priv->extend_desc)) 3886 desc_size = sizeof(struct dma_extended_desc); 3887 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 3888 desc_size = sizeof(struct dma_edesc); 3889 else 3890 desc_size = sizeof(struct dma_desc); 3891 3892 /* The own bit must be the latest setting done when prepare the 3893 * descriptor and then barrier is needed to make sure that 3894 * all is coherent before granting the DMA engine. 3895 */ 3896 wmb(); 3897 3898 tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * desc_size); 3899 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue); 3900 } 3901 3902 /** 3903 * stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO) 3904 * @skb : the socket buffer 3905 * @dev : device pointer 3906 * Description: this is the transmit function that is called on TSO frames 3907 * (support available on GMAC4 and newer chips). 3908 * Diagram below show the ring programming in case of TSO frames: 3909 * 3910 * First Descriptor 3911 * -------- 3912 * | DES0 |---> buffer1 = L2/L3/L4 header 3913 * | DES1 |---> TCP Payload (can continue on next descr...) 3914 * | DES2 |---> buffer 1 and 2 len 3915 * | DES3 |---> must set TSE, TCP hdr len-> [22:19]. TCP payload len [17:0] 3916 * -------- 3917 * | 3918 * ... 3919 * | 3920 * -------- 3921 * | DES0 | --| Split TCP Payload on Buffers 1 and 2 3922 * | DES1 | --| 3923 * | DES2 | --> buffer 1 and 2 len 3924 * | DES3 | 3925 * -------- 3926 * 3927 * mss is fixed when enable tso, so w/o programming the TDES3 ctx field. 3928 */ 3929 static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev) 3930 { 3931 struct dma_desc *desc, *first, *mss_desc = NULL; 3932 struct stmmac_priv *priv = netdev_priv(dev); 3933 int nfrags = skb_shinfo(skb)->nr_frags; 3934 u32 queue = skb_get_queue_mapping(skb); 3935 unsigned int first_entry, tx_packets; 3936 int tmp_pay_len = 0, first_tx; 3937 struct stmmac_tx_queue *tx_q; 3938 bool has_vlan, set_ic; 3939 u8 proto_hdr_len, hdr; 3940 u32 pay_len, mss; 3941 dma_addr_t des; 3942 int i; 3943 3944 tx_q = &priv->tx_queue[queue]; 3945 first_tx = tx_q->cur_tx; 3946 3947 /* Compute header lengths */ 3948 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) { 3949 proto_hdr_len = skb_transport_offset(skb) + sizeof(struct udphdr); 3950 hdr = sizeof(struct udphdr); 3951 } else { 3952 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); 3953 hdr = tcp_hdrlen(skb); 3954 } 3955 3956 /* Desc availability based on threshold should be enough safe */ 3957 if (unlikely(stmmac_tx_avail(priv, queue) < 3958 (((skb->len - proto_hdr_len) / TSO_MAX_BUFF_SIZE + 1)))) { 3959 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) { 3960 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, 3961 queue)); 3962 /* This is a hard error, log it. */ 3963 netdev_err(priv->dev, 3964 "%s: Tx Ring full when queue awake\n", 3965 __func__); 3966 } 3967 return NETDEV_TX_BUSY; 3968 } 3969 3970 pay_len = skb_headlen(skb) - proto_hdr_len; /* no frags */ 3971 3972 mss = skb_shinfo(skb)->gso_size; 3973 3974 /* set new MSS value if needed */ 3975 if (mss != tx_q->mss) { 3976 if (tx_q->tbs & STMMAC_TBS_AVAIL) 3977 mss_desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 3978 else 3979 mss_desc = &tx_q->dma_tx[tx_q->cur_tx]; 3980 3981 stmmac_set_mss(priv, mss_desc, mss); 3982 tx_q->mss = mss; 3983 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, 3984 priv->dma_tx_size); 3985 WARN_ON(tx_q->tx_skbuff[tx_q->cur_tx]); 3986 } 3987 3988 if (netif_msg_tx_queued(priv)) { 3989 pr_info("%s: hdrlen %d, hdr_len %d, pay_len %d, mss %d\n", 3990 __func__, hdr, proto_hdr_len, pay_len, mss); 3991 pr_info("\tskb->len %d, skb->data_len %d\n", skb->len, 3992 skb->data_len); 3993 } 3994 3995 /* Check if VLAN can be inserted by HW */ 3996 has_vlan = stmmac_vlan_insert(priv, skb, tx_q); 3997 3998 first_entry = tx_q->cur_tx; 3999 WARN_ON(tx_q->tx_skbuff[first_entry]); 4000 4001 if (tx_q->tbs & STMMAC_TBS_AVAIL) 4002 desc = &tx_q->dma_entx[first_entry].basic; 4003 else 4004 desc = &tx_q->dma_tx[first_entry]; 4005 first = desc; 4006 4007 if (has_vlan) 4008 stmmac_set_desc_vlan(priv, first, STMMAC_VLAN_INSERT); 4009 4010 /* first descriptor: fill Headers on Buf1 */ 4011 des = dma_map_single(priv->device, skb->data, skb_headlen(skb), 4012 DMA_TO_DEVICE); 4013 if (dma_mapping_error(priv->device, des)) 4014 goto dma_map_err; 4015 4016 tx_q->tx_skbuff_dma[first_entry].buf = des; 4017 tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb); 4018 tx_q->tx_skbuff_dma[first_entry].map_as_page = false; 4019 tx_q->tx_skbuff_dma[first_entry].buf_type = STMMAC_TXBUF_T_SKB; 4020 4021 if (priv->dma_cap.addr64 <= 32) { 4022 first->des0 = cpu_to_le32(des); 4023 4024 /* Fill start of payload in buff2 of first descriptor */ 4025 if (pay_len) 4026 first->des1 = cpu_to_le32(des + proto_hdr_len); 4027 4028 /* If needed take extra descriptors to fill the remaining payload */ 4029 tmp_pay_len = pay_len - TSO_MAX_BUFF_SIZE; 4030 } else { 4031 stmmac_set_desc_addr(priv, first, des); 4032 tmp_pay_len = pay_len; 4033 des += proto_hdr_len; 4034 pay_len = 0; 4035 } 4036 4037 stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0), queue); 4038 4039 /* Prepare fragments */ 4040 for (i = 0; i < nfrags; i++) { 4041 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 4042 4043 des = skb_frag_dma_map(priv->device, frag, 0, 4044 skb_frag_size(frag), 4045 DMA_TO_DEVICE); 4046 if (dma_mapping_error(priv->device, des)) 4047 goto dma_map_err; 4048 4049 stmmac_tso_allocator(priv, des, skb_frag_size(frag), 4050 (i == nfrags - 1), queue); 4051 4052 tx_q->tx_skbuff_dma[tx_q->cur_tx].buf = des; 4053 tx_q->tx_skbuff_dma[tx_q->cur_tx].len = skb_frag_size(frag); 4054 tx_q->tx_skbuff_dma[tx_q->cur_tx].map_as_page = true; 4055 tx_q->tx_skbuff_dma[tx_q->cur_tx].buf_type = STMMAC_TXBUF_T_SKB; 4056 } 4057 4058 tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true; 4059 4060 /* Only the last descriptor gets to point to the skb. */ 4061 tx_q->tx_skbuff[tx_q->cur_tx] = skb; 4062 tx_q->tx_skbuff_dma[tx_q->cur_tx].buf_type = STMMAC_TXBUF_T_SKB; 4063 4064 /* Manage tx mitigation */ 4065 tx_packets = (tx_q->cur_tx + 1) - first_tx; 4066 tx_q->tx_count_frames += tx_packets; 4067 4068 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && priv->hwts_tx_en) 4069 set_ic = true; 4070 else if (!priv->tx_coal_frames[queue]) 4071 set_ic = false; 4072 else if (tx_packets > priv->tx_coal_frames[queue]) 4073 set_ic = true; 4074 else if ((tx_q->tx_count_frames % 4075 priv->tx_coal_frames[queue]) < tx_packets) 4076 set_ic = true; 4077 else 4078 set_ic = false; 4079 4080 if (set_ic) { 4081 if (tx_q->tbs & STMMAC_TBS_AVAIL) 4082 desc = &tx_q->dma_entx[tx_q->cur_tx].basic; 4083 else 4084 desc = &tx_q->dma_tx[tx_q->cur_tx]; 4085 4086 tx_q->tx_count_frames = 0; 4087 stmmac_set_tx_ic(priv, desc); 4088 priv->xstats.tx_set_ic_bit++; 4089 } 4090 4091 /* We've used all descriptors we need for this skb, however, 4092 * advance cur_tx so that it references a fresh descriptor. 4093 * ndo_start_xmit will fill this descriptor the next time it's 4094 * called and stmmac_tx_clean may clean up to this descriptor. 4095 */ 4096 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, priv->dma_tx_size); 4097 4098 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) { 4099 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n", 4100 __func__); 4101 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue)); 4102 } 4103 4104 dev->stats.tx_bytes += skb->len; 4105 priv->xstats.tx_tso_frames++; 4106 priv->xstats.tx_tso_nfrags += nfrags; 4107 4108 if (priv->sarc_type) 4109 stmmac_set_desc_sarc(priv, first, priv->sarc_type); 4110 4111 skb_tx_timestamp(skb); 4112 4113 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 4114 priv->hwts_tx_en)) { 4115 /* declare that device is doing timestamping */ 4116 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 4117 stmmac_enable_tx_timestamp(priv, first); 4118 } 4119 4120 /* Complete the first descriptor before granting the DMA */ 4121 stmmac_prepare_tso_tx_desc(priv, first, 1, 4122 proto_hdr_len, 4123 pay_len, 4124 1, tx_q->tx_skbuff_dma[first_entry].last_segment, 4125 hdr / 4, (skb->len - proto_hdr_len)); 4126 4127 /* If context desc is used to change MSS */ 4128 if (mss_desc) { 4129 /* Make sure that first descriptor has been completely 4130 * written, including its own bit. This is because MSS is 4131 * actually before first descriptor, so we need to make 4132 * sure that MSS's own bit is the last thing written. 4133 */ 4134 dma_wmb(); 4135 stmmac_set_tx_owner(priv, mss_desc); 4136 } 4137 4138 if (netif_msg_pktdata(priv)) { 4139 pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n", 4140 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry, 4141 tx_q->cur_tx, first, nfrags); 4142 pr_info(">>> frame to be transmitted: "); 4143 print_pkt(skb->data, skb_headlen(skb)); 4144 } 4145 4146 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); 4147 4148 stmmac_flush_tx_descriptors(priv, queue); 4149 stmmac_tx_timer_arm(priv, queue); 4150 4151 return NETDEV_TX_OK; 4152 4153 dma_map_err: 4154 dev_err(priv->device, "Tx dma map failed\n"); 4155 dev_kfree_skb(skb); 4156 priv->dev->stats.tx_dropped++; 4157 return NETDEV_TX_OK; 4158 } 4159 4160 /** 4161 * stmmac_xmit - Tx entry point of the driver 4162 * @skb : the socket buffer 4163 * @dev : device pointer 4164 * Description : this is the tx entry point of the driver. 4165 * It programs the chain or the ring and supports oversized frames 4166 * and SG feature. 4167 */ 4168 static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) 4169 { 4170 unsigned int first_entry, tx_packets, enh_desc; 4171 struct stmmac_priv *priv = netdev_priv(dev); 4172 unsigned int nopaged_len = skb_headlen(skb); 4173 int i, csum_insertion = 0, is_jumbo = 0; 4174 u32 queue = skb_get_queue_mapping(skb); 4175 int nfrags = skb_shinfo(skb)->nr_frags; 4176 int gso = skb_shinfo(skb)->gso_type; 4177 struct dma_edesc *tbs_desc = NULL; 4178 struct dma_desc *desc, *first; 4179 struct stmmac_tx_queue *tx_q; 4180 bool has_vlan, set_ic; 4181 int entry, first_tx; 4182 dma_addr_t des; 4183 4184 tx_q = &priv->tx_queue[queue]; 4185 first_tx = tx_q->cur_tx; 4186 4187 if (priv->tx_path_in_lpi_mode && priv->eee_sw_timer_en) 4188 stmmac_disable_eee_mode(priv); 4189 4190 /* Manage oversized TCP frames for GMAC4 device */ 4191 if (skb_is_gso(skb) && priv->tso) { 4192 if (gso & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) 4193 return stmmac_tso_xmit(skb, dev); 4194 if (priv->plat->has_gmac4 && (gso & SKB_GSO_UDP_L4)) 4195 return stmmac_tso_xmit(skb, dev); 4196 } 4197 4198 if (unlikely(stmmac_tx_avail(priv, queue) < nfrags + 1)) { 4199 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) { 4200 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, 4201 queue)); 4202 /* This is a hard error, log it. */ 4203 netdev_err(priv->dev, 4204 "%s: Tx Ring full when queue awake\n", 4205 __func__); 4206 } 4207 return NETDEV_TX_BUSY; 4208 } 4209 4210 /* Check if VLAN can be inserted by HW */ 4211 has_vlan = stmmac_vlan_insert(priv, skb, tx_q); 4212 4213 entry = tx_q->cur_tx; 4214 first_entry = entry; 4215 WARN_ON(tx_q->tx_skbuff[first_entry]); 4216 4217 csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL); 4218 4219 if (likely(priv->extend_desc)) 4220 desc = (struct dma_desc *)(tx_q->dma_etx + entry); 4221 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 4222 desc = &tx_q->dma_entx[entry].basic; 4223 else 4224 desc = tx_q->dma_tx + entry; 4225 4226 first = desc; 4227 4228 if (has_vlan) 4229 stmmac_set_desc_vlan(priv, first, STMMAC_VLAN_INSERT); 4230 4231 enh_desc = priv->plat->enh_desc; 4232 /* To program the descriptors according to the size of the frame */ 4233 if (enh_desc) 4234 is_jumbo = stmmac_is_jumbo_frm(priv, skb->len, enh_desc); 4235 4236 if (unlikely(is_jumbo)) { 4237 entry = stmmac_jumbo_frm(priv, tx_q, skb, csum_insertion); 4238 if (unlikely(entry < 0) && (entry != -EINVAL)) 4239 goto dma_map_err; 4240 } 4241 4242 for (i = 0; i < nfrags; i++) { 4243 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 4244 int len = skb_frag_size(frag); 4245 bool last_segment = (i == (nfrags - 1)); 4246 4247 entry = STMMAC_GET_ENTRY(entry, priv->dma_tx_size); 4248 WARN_ON(tx_q->tx_skbuff[entry]); 4249 4250 if (likely(priv->extend_desc)) 4251 desc = (struct dma_desc *)(tx_q->dma_etx + entry); 4252 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 4253 desc = &tx_q->dma_entx[entry].basic; 4254 else 4255 desc = tx_q->dma_tx + entry; 4256 4257 des = skb_frag_dma_map(priv->device, frag, 0, len, 4258 DMA_TO_DEVICE); 4259 if (dma_mapping_error(priv->device, des)) 4260 goto dma_map_err; /* should reuse desc w/o issues */ 4261 4262 tx_q->tx_skbuff_dma[entry].buf = des; 4263 4264 stmmac_set_desc_addr(priv, desc, des); 4265 4266 tx_q->tx_skbuff_dma[entry].map_as_page = true; 4267 tx_q->tx_skbuff_dma[entry].len = len; 4268 tx_q->tx_skbuff_dma[entry].last_segment = last_segment; 4269 tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_SKB; 4270 4271 /* Prepare the descriptor and set the own bit too */ 4272 stmmac_prepare_tx_desc(priv, desc, 0, len, csum_insertion, 4273 priv->mode, 1, last_segment, skb->len); 4274 } 4275 4276 /* Only the last descriptor gets to point to the skb. */ 4277 tx_q->tx_skbuff[entry] = skb; 4278 tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_SKB; 4279 4280 /* According to the coalesce parameter the IC bit for the latest 4281 * segment is reset and the timer re-started to clean the tx status. 4282 * This approach takes care about the fragments: desc is the first 4283 * element in case of no SG. 4284 */ 4285 tx_packets = (entry + 1) - first_tx; 4286 tx_q->tx_count_frames += tx_packets; 4287 4288 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && priv->hwts_tx_en) 4289 set_ic = true; 4290 else if (!priv->tx_coal_frames[queue]) 4291 set_ic = false; 4292 else if (tx_packets > priv->tx_coal_frames[queue]) 4293 set_ic = true; 4294 else if ((tx_q->tx_count_frames % 4295 priv->tx_coal_frames[queue]) < tx_packets) 4296 set_ic = true; 4297 else 4298 set_ic = false; 4299 4300 if (set_ic) { 4301 if (likely(priv->extend_desc)) 4302 desc = &tx_q->dma_etx[entry].basic; 4303 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 4304 desc = &tx_q->dma_entx[entry].basic; 4305 else 4306 desc = &tx_q->dma_tx[entry]; 4307 4308 tx_q->tx_count_frames = 0; 4309 stmmac_set_tx_ic(priv, desc); 4310 priv->xstats.tx_set_ic_bit++; 4311 } 4312 4313 /* We've used all descriptors we need for this skb, however, 4314 * advance cur_tx so that it references a fresh descriptor. 4315 * ndo_start_xmit will fill this descriptor the next time it's 4316 * called and stmmac_tx_clean may clean up to this descriptor. 4317 */ 4318 entry = STMMAC_GET_ENTRY(entry, priv->dma_tx_size); 4319 tx_q->cur_tx = entry; 4320 4321 if (netif_msg_pktdata(priv)) { 4322 netdev_dbg(priv->dev, 4323 "%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d", 4324 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry, 4325 entry, first, nfrags); 4326 4327 netdev_dbg(priv->dev, ">>> frame to be transmitted: "); 4328 print_pkt(skb->data, skb->len); 4329 } 4330 4331 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) { 4332 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n", 4333 __func__); 4334 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue)); 4335 } 4336 4337 dev->stats.tx_bytes += skb->len; 4338 4339 if (priv->sarc_type) 4340 stmmac_set_desc_sarc(priv, first, priv->sarc_type); 4341 4342 skb_tx_timestamp(skb); 4343 4344 /* Ready to fill the first descriptor and set the OWN bit w/o any 4345 * problems because all the descriptors are actually ready to be 4346 * passed to the DMA engine. 4347 */ 4348 if (likely(!is_jumbo)) { 4349 bool last_segment = (nfrags == 0); 4350 4351 des = dma_map_single(priv->device, skb->data, 4352 nopaged_len, DMA_TO_DEVICE); 4353 if (dma_mapping_error(priv->device, des)) 4354 goto dma_map_err; 4355 4356 tx_q->tx_skbuff_dma[first_entry].buf = des; 4357 tx_q->tx_skbuff_dma[first_entry].buf_type = STMMAC_TXBUF_T_SKB; 4358 tx_q->tx_skbuff_dma[first_entry].map_as_page = false; 4359 4360 stmmac_set_desc_addr(priv, first, des); 4361 4362 tx_q->tx_skbuff_dma[first_entry].len = nopaged_len; 4363 tx_q->tx_skbuff_dma[first_entry].last_segment = last_segment; 4364 4365 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 4366 priv->hwts_tx_en)) { 4367 /* declare that device is doing timestamping */ 4368 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 4369 stmmac_enable_tx_timestamp(priv, first); 4370 } 4371 4372 /* Prepare the first descriptor setting the OWN bit too */ 4373 stmmac_prepare_tx_desc(priv, first, 1, nopaged_len, 4374 csum_insertion, priv->mode, 0, last_segment, 4375 skb->len); 4376 } 4377 4378 if (tx_q->tbs & STMMAC_TBS_EN) { 4379 struct timespec64 ts = ns_to_timespec64(skb->tstamp); 4380 4381 tbs_desc = &tx_q->dma_entx[first_entry]; 4382 stmmac_set_desc_tbs(priv, tbs_desc, ts.tv_sec, ts.tv_nsec); 4383 } 4384 4385 stmmac_set_tx_owner(priv, first); 4386 4387 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len); 4388 4389 stmmac_enable_dma_transmission(priv, priv->ioaddr); 4390 4391 stmmac_flush_tx_descriptors(priv, queue); 4392 stmmac_tx_timer_arm(priv, queue); 4393 4394 return NETDEV_TX_OK; 4395 4396 dma_map_err: 4397 netdev_err(priv->dev, "Tx DMA map failed\n"); 4398 dev_kfree_skb(skb); 4399 priv->dev->stats.tx_dropped++; 4400 return NETDEV_TX_OK; 4401 } 4402 4403 static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb) 4404 { 4405 struct vlan_ethhdr *veth; 4406 __be16 vlan_proto; 4407 u16 vlanid; 4408 4409 veth = (struct vlan_ethhdr *)skb->data; 4410 vlan_proto = veth->h_vlan_proto; 4411 4412 if ((vlan_proto == htons(ETH_P_8021Q) && 4413 dev->features & NETIF_F_HW_VLAN_CTAG_RX) || 4414 (vlan_proto == htons(ETH_P_8021AD) && 4415 dev->features & NETIF_F_HW_VLAN_STAG_RX)) { 4416 /* pop the vlan tag */ 4417 vlanid = ntohs(veth->h_vlan_TCI); 4418 memmove(skb->data + VLAN_HLEN, veth, ETH_ALEN * 2); 4419 skb_pull(skb, VLAN_HLEN); 4420 __vlan_hwaccel_put_tag(skb, vlan_proto, vlanid); 4421 } 4422 } 4423 4424 /** 4425 * stmmac_rx_refill - refill used skb preallocated buffers 4426 * @priv: driver private structure 4427 * @queue: RX queue index 4428 * Description : this is to reallocate the skb for the reception process 4429 * that is based on zero-copy. 4430 */ 4431 static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue) 4432 { 4433 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 4434 int dirty = stmmac_rx_dirty(priv, queue); 4435 unsigned int entry = rx_q->dirty_rx; 4436 4437 while (dirty-- > 0) { 4438 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[entry]; 4439 struct dma_desc *p; 4440 bool use_rx_wd; 4441 4442 if (priv->extend_desc) 4443 p = (struct dma_desc *)(rx_q->dma_erx + entry); 4444 else 4445 p = rx_q->dma_rx + entry; 4446 4447 if (!buf->page) { 4448 buf->page = page_pool_dev_alloc_pages(rx_q->page_pool); 4449 if (!buf->page) 4450 break; 4451 } 4452 4453 if (priv->sph && !buf->sec_page) { 4454 buf->sec_page = page_pool_dev_alloc_pages(rx_q->page_pool); 4455 if (!buf->sec_page) 4456 break; 4457 4458 buf->sec_addr = page_pool_get_dma_addr(buf->sec_page); 4459 } 4460 4461 buf->addr = page_pool_get_dma_addr(buf->page) + buf->page_offset; 4462 4463 stmmac_set_desc_addr(priv, p, buf->addr); 4464 if (priv->sph) 4465 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr, true); 4466 else 4467 stmmac_set_desc_sec_addr(priv, p, buf->sec_addr, false); 4468 stmmac_refill_desc3(priv, rx_q, p); 4469 4470 rx_q->rx_count_frames++; 4471 rx_q->rx_count_frames += priv->rx_coal_frames[queue]; 4472 if (rx_q->rx_count_frames > priv->rx_coal_frames[queue]) 4473 rx_q->rx_count_frames = 0; 4474 4475 use_rx_wd = !priv->rx_coal_frames[queue]; 4476 use_rx_wd |= rx_q->rx_count_frames > 0; 4477 if (!priv->use_riwt) 4478 use_rx_wd = false; 4479 4480 dma_wmb(); 4481 stmmac_set_rx_owner(priv, p, use_rx_wd); 4482 4483 entry = STMMAC_GET_ENTRY(entry, priv->dma_rx_size); 4484 } 4485 rx_q->dirty_rx = entry; 4486 rx_q->rx_tail_addr = rx_q->dma_rx_phy + 4487 (rx_q->dirty_rx * sizeof(struct dma_desc)); 4488 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue); 4489 } 4490 4491 static unsigned int stmmac_rx_buf1_len(struct stmmac_priv *priv, 4492 struct dma_desc *p, 4493 int status, unsigned int len) 4494 { 4495 unsigned int plen = 0, hlen = 0; 4496 int coe = priv->hw->rx_csum; 4497 4498 /* Not first descriptor, buffer is always zero */ 4499 if (priv->sph && len) 4500 return 0; 4501 4502 /* First descriptor, get split header length */ 4503 stmmac_get_rx_header_len(priv, p, &hlen); 4504 if (priv->sph && hlen) { 4505 priv->xstats.rx_split_hdr_pkt_n++; 4506 return hlen; 4507 } 4508 4509 /* First descriptor, not last descriptor and not split header */ 4510 if (status & rx_not_ls) 4511 return priv->dma_buf_sz; 4512 4513 plen = stmmac_get_rx_frame_len(priv, p, coe); 4514 4515 /* First descriptor and last descriptor and not split header */ 4516 return min_t(unsigned int, priv->dma_buf_sz, plen); 4517 } 4518 4519 static unsigned int stmmac_rx_buf2_len(struct stmmac_priv *priv, 4520 struct dma_desc *p, 4521 int status, unsigned int len) 4522 { 4523 int coe = priv->hw->rx_csum; 4524 unsigned int plen = 0; 4525 4526 /* Not split header, buffer is not available */ 4527 if (!priv->sph) 4528 return 0; 4529 4530 /* Not last descriptor */ 4531 if (status & rx_not_ls) 4532 return priv->dma_buf_sz; 4533 4534 plen = stmmac_get_rx_frame_len(priv, p, coe); 4535 4536 /* Last descriptor */ 4537 return plen - len; 4538 } 4539 4540 static int stmmac_xdp_xmit_xdpf(struct stmmac_priv *priv, int queue, 4541 struct xdp_frame *xdpf, bool dma_map) 4542 { 4543 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 4544 unsigned int entry = tx_q->cur_tx; 4545 struct dma_desc *tx_desc; 4546 dma_addr_t dma_addr; 4547 bool set_ic; 4548 4549 if (stmmac_tx_avail(priv, queue) < STMMAC_TX_THRESH(priv)) 4550 return STMMAC_XDP_CONSUMED; 4551 4552 if (likely(priv->extend_desc)) 4553 tx_desc = (struct dma_desc *)(tx_q->dma_etx + entry); 4554 else if (tx_q->tbs & STMMAC_TBS_AVAIL) 4555 tx_desc = &tx_q->dma_entx[entry].basic; 4556 else 4557 tx_desc = tx_q->dma_tx + entry; 4558 4559 if (dma_map) { 4560 dma_addr = dma_map_single(priv->device, xdpf->data, 4561 xdpf->len, DMA_TO_DEVICE); 4562 if (dma_mapping_error(priv->device, dma_addr)) 4563 return STMMAC_XDP_CONSUMED; 4564 4565 tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_XDP_NDO; 4566 } else { 4567 struct page *page = virt_to_page(xdpf->data); 4568 4569 dma_addr = page_pool_get_dma_addr(page) + sizeof(*xdpf) + 4570 xdpf->headroom; 4571 dma_sync_single_for_device(priv->device, dma_addr, 4572 xdpf->len, DMA_BIDIRECTIONAL); 4573 4574 tx_q->tx_skbuff_dma[entry].buf_type = STMMAC_TXBUF_T_XDP_TX; 4575 } 4576 4577 tx_q->tx_skbuff_dma[entry].buf = dma_addr; 4578 tx_q->tx_skbuff_dma[entry].map_as_page = false; 4579 tx_q->tx_skbuff_dma[entry].len = xdpf->len; 4580 tx_q->tx_skbuff_dma[entry].last_segment = true; 4581 tx_q->tx_skbuff_dma[entry].is_jumbo = false; 4582 4583 tx_q->xdpf[entry] = xdpf; 4584 4585 stmmac_set_desc_addr(priv, tx_desc, dma_addr); 4586 4587 stmmac_prepare_tx_desc(priv, tx_desc, 1, xdpf->len, 4588 true, priv->mode, true, true, 4589 xdpf->len); 4590 4591 tx_q->tx_count_frames++; 4592 4593 if (tx_q->tx_count_frames % priv->tx_coal_frames[queue] == 0) 4594 set_ic = true; 4595 else 4596 set_ic = false; 4597 4598 if (set_ic) { 4599 tx_q->tx_count_frames = 0; 4600 stmmac_set_tx_ic(priv, tx_desc); 4601 priv->xstats.tx_set_ic_bit++; 4602 } 4603 4604 stmmac_enable_dma_transmission(priv, priv->ioaddr); 4605 4606 entry = STMMAC_GET_ENTRY(entry, priv->dma_tx_size); 4607 tx_q->cur_tx = entry; 4608 4609 return STMMAC_XDP_TX; 4610 } 4611 4612 static int stmmac_xdp_get_tx_queue(struct stmmac_priv *priv, 4613 int cpu) 4614 { 4615 int index = cpu; 4616 4617 if (unlikely(index < 0)) 4618 index = 0; 4619 4620 while (index >= priv->plat->tx_queues_to_use) 4621 index -= priv->plat->tx_queues_to_use; 4622 4623 return index; 4624 } 4625 4626 static int stmmac_xdp_xmit_back(struct stmmac_priv *priv, 4627 struct xdp_buff *xdp) 4628 { 4629 struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp); 4630 int cpu = smp_processor_id(); 4631 struct netdev_queue *nq; 4632 int queue; 4633 int res; 4634 4635 if (unlikely(!xdpf)) 4636 return STMMAC_XDP_CONSUMED; 4637 4638 queue = stmmac_xdp_get_tx_queue(priv, cpu); 4639 nq = netdev_get_tx_queue(priv->dev, queue); 4640 4641 __netif_tx_lock(nq, cpu); 4642 /* Avoids TX time-out as we are sharing with slow path */ 4643 nq->trans_start = jiffies; 4644 4645 res = stmmac_xdp_xmit_xdpf(priv, queue, xdpf, false); 4646 if (res == STMMAC_XDP_TX) 4647 stmmac_flush_tx_descriptors(priv, queue); 4648 4649 __netif_tx_unlock(nq); 4650 4651 return res; 4652 } 4653 4654 /* This function assumes rcu_read_lock() is held by the caller. */ 4655 static int __stmmac_xdp_run_prog(struct stmmac_priv *priv, 4656 struct bpf_prog *prog, 4657 struct xdp_buff *xdp) 4658 { 4659 u32 act; 4660 int res; 4661 4662 act = bpf_prog_run_xdp(prog, xdp); 4663 switch (act) { 4664 case XDP_PASS: 4665 res = STMMAC_XDP_PASS; 4666 break; 4667 case XDP_TX: 4668 res = stmmac_xdp_xmit_back(priv, xdp); 4669 break; 4670 case XDP_REDIRECT: 4671 if (xdp_do_redirect(priv->dev, xdp, prog) < 0) 4672 res = STMMAC_XDP_CONSUMED; 4673 else 4674 res = STMMAC_XDP_REDIRECT; 4675 break; 4676 default: 4677 bpf_warn_invalid_xdp_action(act); 4678 fallthrough; 4679 case XDP_ABORTED: 4680 trace_xdp_exception(priv->dev, prog, act); 4681 fallthrough; 4682 case XDP_DROP: 4683 res = STMMAC_XDP_CONSUMED; 4684 break; 4685 } 4686 4687 return res; 4688 } 4689 4690 static struct sk_buff *stmmac_xdp_run_prog(struct stmmac_priv *priv, 4691 struct xdp_buff *xdp) 4692 { 4693 struct bpf_prog *prog; 4694 int res; 4695 4696 rcu_read_lock(); 4697 4698 prog = READ_ONCE(priv->xdp_prog); 4699 if (!prog) { 4700 res = STMMAC_XDP_PASS; 4701 goto unlock; 4702 } 4703 4704 res = __stmmac_xdp_run_prog(priv, prog, xdp); 4705 unlock: 4706 rcu_read_unlock(); 4707 return ERR_PTR(-res); 4708 } 4709 4710 static void stmmac_finalize_xdp_rx(struct stmmac_priv *priv, 4711 int xdp_status) 4712 { 4713 int cpu = smp_processor_id(); 4714 int queue; 4715 4716 queue = stmmac_xdp_get_tx_queue(priv, cpu); 4717 4718 if (xdp_status & STMMAC_XDP_TX) 4719 stmmac_tx_timer_arm(priv, queue); 4720 4721 if (xdp_status & STMMAC_XDP_REDIRECT) 4722 xdp_do_flush(); 4723 } 4724 4725 static struct sk_buff *stmmac_construct_skb_zc(struct stmmac_channel *ch, 4726 struct xdp_buff *xdp) 4727 { 4728 unsigned int metasize = xdp->data - xdp->data_meta; 4729 unsigned int datasize = xdp->data_end - xdp->data; 4730 struct sk_buff *skb; 4731 4732 skb = __napi_alloc_skb(&ch->rxtx_napi, 4733 xdp->data_end - xdp->data_hard_start, 4734 GFP_ATOMIC | __GFP_NOWARN); 4735 if (unlikely(!skb)) 4736 return NULL; 4737 4738 skb_reserve(skb, xdp->data - xdp->data_hard_start); 4739 memcpy(__skb_put(skb, datasize), xdp->data, datasize); 4740 if (metasize) 4741 skb_metadata_set(skb, metasize); 4742 4743 return skb; 4744 } 4745 4746 static void stmmac_dispatch_skb_zc(struct stmmac_priv *priv, u32 queue, 4747 struct dma_desc *p, struct dma_desc *np, 4748 struct xdp_buff *xdp) 4749 { 4750 struct stmmac_channel *ch = &priv->channel[queue]; 4751 unsigned int len = xdp->data_end - xdp->data; 4752 enum pkt_hash_types hash_type; 4753 int coe = priv->hw->rx_csum; 4754 struct sk_buff *skb; 4755 u32 hash; 4756 4757 skb = stmmac_construct_skb_zc(ch, xdp); 4758 if (!skb) { 4759 priv->dev->stats.rx_dropped++; 4760 return; 4761 } 4762 4763 stmmac_get_rx_hwtstamp(priv, p, np, skb); 4764 stmmac_rx_vlan(priv->dev, skb); 4765 skb->protocol = eth_type_trans(skb, priv->dev); 4766 4767 if (unlikely(!coe)) 4768 skb_checksum_none_assert(skb); 4769 else 4770 skb->ip_summed = CHECKSUM_UNNECESSARY; 4771 4772 if (!stmmac_get_rx_hash(priv, p, &hash, &hash_type)) 4773 skb_set_hash(skb, hash, hash_type); 4774 4775 skb_record_rx_queue(skb, queue); 4776 napi_gro_receive(&ch->rxtx_napi, skb); 4777 4778 priv->dev->stats.rx_packets++; 4779 priv->dev->stats.rx_bytes += len; 4780 } 4781 4782 static bool stmmac_rx_refill_zc(struct stmmac_priv *priv, u32 queue, u32 budget) 4783 { 4784 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 4785 unsigned int entry = rx_q->dirty_rx; 4786 struct dma_desc *rx_desc = NULL; 4787 bool ret = true; 4788 4789 budget = min(budget, stmmac_rx_dirty(priv, queue)); 4790 4791 while (budget-- > 0 && entry != rx_q->cur_rx) { 4792 struct stmmac_rx_buffer *buf = &rx_q->buf_pool[entry]; 4793 dma_addr_t dma_addr; 4794 bool use_rx_wd; 4795 4796 if (!buf->xdp) { 4797 buf->xdp = xsk_buff_alloc(rx_q->xsk_pool); 4798 if (!buf->xdp) { 4799 ret = false; 4800 break; 4801 } 4802 } 4803 4804 if (priv->extend_desc) 4805 rx_desc = (struct dma_desc *)(rx_q->dma_erx + entry); 4806 else 4807 rx_desc = rx_q->dma_rx + entry; 4808 4809 dma_addr = xsk_buff_xdp_get_dma(buf->xdp); 4810 stmmac_set_desc_addr(priv, rx_desc, dma_addr); 4811 stmmac_set_desc_sec_addr(priv, rx_desc, 0, false); 4812 stmmac_refill_desc3(priv, rx_q, rx_desc); 4813 4814 rx_q->rx_count_frames++; 4815 rx_q->rx_count_frames += priv->rx_coal_frames[queue]; 4816 if (rx_q->rx_count_frames > priv->rx_coal_frames[queue]) 4817 rx_q->rx_count_frames = 0; 4818 4819 use_rx_wd = !priv->rx_coal_frames[queue]; 4820 use_rx_wd |= rx_q->rx_count_frames > 0; 4821 if (!priv->use_riwt) 4822 use_rx_wd = false; 4823 4824 dma_wmb(); 4825 stmmac_set_rx_owner(priv, rx_desc, use_rx_wd); 4826 4827 entry = STMMAC_GET_ENTRY(entry, priv->dma_rx_size); 4828 } 4829 4830 if (rx_desc) { 4831 rx_q->dirty_rx = entry; 4832 rx_q->rx_tail_addr = rx_q->dma_rx_phy + 4833 (rx_q->dirty_rx * sizeof(struct dma_desc)); 4834 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue); 4835 } 4836 4837 return ret; 4838 } 4839 4840 static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) 4841 { 4842 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 4843 unsigned int count = 0, error = 0, len = 0; 4844 int dirty = stmmac_rx_dirty(priv, queue); 4845 unsigned int next_entry = rx_q->cur_rx; 4846 unsigned int desc_size; 4847 struct bpf_prog *prog; 4848 bool failure = false; 4849 int xdp_status = 0; 4850 int status = 0; 4851 4852 if (netif_msg_rx_status(priv)) { 4853 void *rx_head; 4854 4855 netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__); 4856 if (priv->extend_desc) { 4857 rx_head = (void *)rx_q->dma_erx; 4858 desc_size = sizeof(struct dma_extended_desc); 4859 } else { 4860 rx_head = (void *)rx_q->dma_rx; 4861 desc_size = sizeof(struct dma_desc); 4862 } 4863 4864 stmmac_display_ring(priv, rx_head, priv->dma_rx_size, true, 4865 rx_q->dma_rx_phy, desc_size); 4866 } 4867 while (count < limit) { 4868 struct stmmac_rx_buffer *buf; 4869 unsigned int buf1_len = 0; 4870 struct dma_desc *np, *p; 4871 int entry; 4872 int res; 4873 4874 if (!count && rx_q->state_saved) { 4875 error = rx_q->state.error; 4876 len = rx_q->state.len; 4877 } else { 4878 rx_q->state_saved = false; 4879 error = 0; 4880 len = 0; 4881 } 4882 4883 if (count >= limit) 4884 break; 4885 4886 read_again: 4887 buf1_len = 0; 4888 entry = next_entry; 4889 buf = &rx_q->buf_pool[entry]; 4890 4891 if (dirty >= STMMAC_RX_FILL_BATCH) { 4892 failure = failure || 4893 !stmmac_rx_refill_zc(priv, queue, dirty); 4894 dirty = 0; 4895 } 4896 4897 if (priv->extend_desc) 4898 p = (struct dma_desc *)(rx_q->dma_erx + entry); 4899 else 4900 p = rx_q->dma_rx + entry; 4901 4902 /* read the status of the incoming frame */ 4903 status = stmmac_rx_status(priv, &priv->dev->stats, 4904 &priv->xstats, p); 4905 /* check if managed by the DMA otherwise go ahead */ 4906 if (unlikely(status & dma_own)) 4907 break; 4908 4909 /* Prefetch the next RX descriptor */ 4910 rx_q->cur_rx = STMMAC_GET_ENTRY(rx_q->cur_rx, 4911 priv->dma_rx_size); 4912 next_entry = rx_q->cur_rx; 4913 4914 if (priv->extend_desc) 4915 np = (struct dma_desc *)(rx_q->dma_erx + next_entry); 4916 else 4917 np = rx_q->dma_rx + next_entry; 4918 4919 prefetch(np); 4920 4921 if (priv->extend_desc) 4922 stmmac_rx_extended_status(priv, &priv->dev->stats, 4923 &priv->xstats, 4924 rx_q->dma_erx + entry); 4925 if (unlikely(status == discard_frame)) { 4926 xsk_buff_free(buf->xdp); 4927 buf->xdp = NULL; 4928 dirty++; 4929 error = 1; 4930 if (!priv->hwts_rx_en) 4931 priv->dev->stats.rx_errors++; 4932 } 4933 4934 if (unlikely(error && (status & rx_not_ls))) 4935 goto read_again; 4936 if (unlikely(error)) { 4937 count++; 4938 continue; 4939 } 4940 4941 /* Ensure a valid XSK buffer before proceed */ 4942 if (!buf->xdp) 4943 break; 4944 4945 /* XSK pool expects RX frame 1:1 mapped to XSK buffer */ 4946 if (likely(status & rx_not_ls)) { 4947 xsk_buff_free(buf->xdp); 4948 buf->xdp = NULL; 4949 dirty++; 4950 count++; 4951 goto read_again; 4952 } 4953 4954 /* XDP ZC Frame only support primary buffers for now */ 4955 buf1_len = stmmac_rx_buf1_len(priv, p, status, len); 4956 len += buf1_len; 4957 4958 /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3 4959 * Type frames (LLC/LLC-SNAP) 4960 * 4961 * llc_snap is never checked in GMAC >= 4, so this ACS 4962 * feature is always disabled and packets need to be 4963 * stripped manually. 4964 */ 4965 if (likely(!(status & rx_not_ls)) && 4966 (likely(priv->synopsys_id >= DWMAC_CORE_4_00) || 4967 unlikely(status != llc_snap))) { 4968 buf1_len -= ETH_FCS_LEN; 4969 len -= ETH_FCS_LEN; 4970 } 4971 4972 /* RX buffer is good and fit into a XSK pool buffer */ 4973 buf->xdp->data_end = buf->xdp->data + buf1_len; 4974 xsk_buff_dma_sync_for_cpu(buf->xdp, rx_q->xsk_pool); 4975 4976 rcu_read_lock(); 4977 prog = READ_ONCE(priv->xdp_prog); 4978 res = __stmmac_xdp_run_prog(priv, prog, buf->xdp); 4979 rcu_read_unlock(); 4980 4981 switch (res) { 4982 case STMMAC_XDP_PASS: 4983 stmmac_dispatch_skb_zc(priv, queue, p, np, buf->xdp); 4984 xsk_buff_free(buf->xdp); 4985 break; 4986 case STMMAC_XDP_CONSUMED: 4987 xsk_buff_free(buf->xdp); 4988 priv->dev->stats.rx_dropped++; 4989 break; 4990 case STMMAC_XDP_TX: 4991 case STMMAC_XDP_REDIRECT: 4992 xdp_status |= res; 4993 break; 4994 } 4995 4996 buf->xdp = NULL; 4997 dirty++; 4998 count++; 4999 } 5000 5001 if (status & rx_not_ls) { 5002 rx_q->state_saved = true; 5003 rx_q->state.error = error; 5004 rx_q->state.len = len; 5005 } 5006 5007 stmmac_finalize_xdp_rx(priv, xdp_status); 5008 5009 if (xsk_uses_need_wakeup(rx_q->xsk_pool)) { 5010 if (failure || stmmac_rx_dirty(priv, queue) > 0) 5011 xsk_set_rx_need_wakeup(rx_q->xsk_pool); 5012 else 5013 xsk_clear_rx_need_wakeup(rx_q->xsk_pool); 5014 5015 return (int)count; 5016 } 5017 5018 return failure ? limit : (int)count; 5019 } 5020 5021 /** 5022 * stmmac_rx - manage the receive process 5023 * @priv: driver private structure 5024 * @limit: napi bugget 5025 * @queue: RX queue index. 5026 * Description : this the function called by the napi poll method. 5027 * It gets all the frames inside the ring. 5028 */ 5029 static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) 5030 { 5031 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 5032 struct stmmac_channel *ch = &priv->channel[queue]; 5033 unsigned int count = 0, error = 0, len = 0; 5034 int status = 0, coe = priv->hw->rx_csum; 5035 unsigned int next_entry = rx_q->cur_rx; 5036 enum dma_data_direction dma_dir; 5037 unsigned int desc_size; 5038 struct sk_buff *skb = NULL; 5039 struct xdp_buff xdp; 5040 int xdp_status = 0; 5041 int buf_sz; 5042 5043 dma_dir = page_pool_get_dma_dir(rx_q->page_pool); 5044 buf_sz = DIV_ROUND_UP(priv->dma_buf_sz, PAGE_SIZE) * PAGE_SIZE; 5045 5046 if (netif_msg_rx_status(priv)) { 5047 void *rx_head; 5048 5049 netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__); 5050 if (priv->extend_desc) { 5051 rx_head = (void *)rx_q->dma_erx; 5052 desc_size = sizeof(struct dma_extended_desc); 5053 } else { 5054 rx_head = (void *)rx_q->dma_rx; 5055 desc_size = sizeof(struct dma_desc); 5056 } 5057 5058 stmmac_display_ring(priv, rx_head, priv->dma_rx_size, true, 5059 rx_q->dma_rx_phy, desc_size); 5060 } 5061 while (count < limit) { 5062 unsigned int buf1_len = 0, buf2_len = 0; 5063 enum pkt_hash_types hash_type; 5064 struct stmmac_rx_buffer *buf; 5065 struct dma_desc *np, *p; 5066 int entry; 5067 u32 hash; 5068 5069 if (!count && rx_q->state_saved) { 5070 skb = rx_q->state.skb; 5071 error = rx_q->state.error; 5072 len = rx_q->state.len; 5073 } else { 5074 rx_q->state_saved = false; 5075 skb = NULL; 5076 error = 0; 5077 len = 0; 5078 } 5079 5080 if (count >= limit) 5081 break; 5082 5083 read_again: 5084 buf1_len = 0; 5085 buf2_len = 0; 5086 entry = next_entry; 5087 buf = &rx_q->buf_pool[entry]; 5088 5089 if (priv->extend_desc) 5090 p = (struct dma_desc *)(rx_q->dma_erx + entry); 5091 else 5092 p = rx_q->dma_rx + entry; 5093 5094 /* read the status of the incoming frame */ 5095 status = stmmac_rx_status(priv, &priv->dev->stats, 5096 &priv->xstats, p); 5097 /* check if managed by the DMA otherwise go ahead */ 5098 if (unlikely(status & dma_own)) 5099 break; 5100 5101 rx_q->cur_rx = STMMAC_GET_ENTRY(rx_q->cur_rx, 5102 priv->dma_rx_size); 5103 next_entry = rx_q->cur_rx; 5104 5105 if (priv->extend_desc) 5106 np = (struct dma_desc *)(rx_q->dma_erx + next_entry); 5107 else 5108 np = rx_q->dma_rx + next_entry; 5109 5110 prefetch(np); 5111 5112 if (priv->extend_desc) 5113 stmmac_rx_extended_status(priv, &priv->dev->stats, 5114 &priv->xstats, rx_q->dma_erx + entry); 5115 if (unlikely(status == discard_frame)) { 5116 page_pool_recycle_direct(rx_q->page_pool, buf->page); 5117 buf->page = NULL; 5118 error = 1; 5119 if (!priv->hwts_rx_en) 5120 priv->dev->stats.rx_errors++; 5121 } 5122 5123 if (unlikely(error && (status & rx_not_ls))) 5124 goto read_again; 5125 if (unlikely(error)) { 5126 dev_kfree_skb(skb); 5127 skb = NULL; 5128 count++; 5129 continue; 5130 } 5131 5132 /* Buffer is good. Go on. */ 5133 5134 prefetch(page_address(buf->page) + buf->page_offset); 5135 if (buf->sec_page) 5136 prefetch(page_address(buf->sec_page)); 5137 5138 buf1_len = stmmac_rx_buf1_len(priv, p, status, len); 5139 len += buf1_len; 5140 buf2_len = stmmac_rx_buf2_len(priv, p, status, len); 5141 len += buf2_len; 5142 5143 /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3 5144 * Type frames (LLC/LLC-SNAP) 5145 * 5146 * llc_snap is never checked in GMAC >= 4, so this ACS 5147 * feature is always disabled and packets need to be 5148 * stripped manually. 5149 */ 5150 if (likely(!(status & rx_not_ls)) && 5151 (likely(priv->synopsys_id >= DWMAC_CORE_4_00) || 5152 unlikely(status != llc_snap))) { 5153 if (buf2_len) 5154 buf2_len -= ETH_FCS_LEN; 5155 else 5156 buf1_len -= ETH_FCS_LEN; 5157 5158 len -= ETH_FCS_LEN; 5159 } 5160 5161 if (!skb) { 5162 unsigned int pre_len, sync_len; 5163 5164 dma_sync_single_for_cpu(priv->device, buf->addr, 5165 buf1_len, dma_dir); 5166 5167 xdp_init_buff(&xdp, buf_sz, &rx_q->xdp_rxq); 5168 xdp_prepare_buff(&xdp, page_address(buf->page), 5169 buf->page_offset, buf1_len, false); 5170 5171 pre_len = xdp.data_end - xdp.data_hard_start - 5172 buf->page_offset; 5173 skb = stmmac_xdp_run_prog(priv, &xdp); 5174 /* Due xdp_adjust_tail: DMA sync for_device 5175 * cover max len CPU touch 5176 */ 5177 sync_len = xdp.data_end - xdp.data_hard_start - 5178 buf->page_offset; 5179 sync_len = max(sync_len, pre_len); 5180 5181 /* For Not XDP_PASS verdict */ 5182 if (IS_ERR(skb)) { 5183 unsigned int xdp_res = -PTR_ERR(skb); 5184 5185 if (xdp_res & STMMAC_XDP_CONSUMED) { 5186 page_pool_put_page(rx_q->page_pool, 5187 virt_to_head_page(xdp.data), 5188 sync_len, true); 5189 buf->page = NULL; 5190 priv->dev->stats.rx_dropped++; 5191 5192 /* Clear skb as it was set as 5193 * status by XDP program. 5194 */ 5195 skb = NULL; 5196 5197 if (unlikely((status & rx_not_ls))) 5198 goto read_again; 5199 5200 count++; 5201 continue; 5202 } else if (xdp_res & (STMMAC_XDP_TX | 5203 STMMAC_XDP_REDIRECT)) { 5204 xdp_status |= xdp_res; 5205 buf->page = NULL; 5206 skb = NULL; 5207 count++; 5208 continue; 5209 } 5210 } 5211 } 5212 5213 if (!skb) { 5214 /* XDP program may expand or reduce tail */ 5215 buf1_len = xdp.data_end - xdp.data; 5216 5217 skb = napi_alloc_skb(&ch->rx_napi, buf1_len); 5218 if (!skb) { 5219 priv->dev->stats.rx_dropped++; 5220 count++; 5221 goto drain_data; 5222 } 5223 5224 /* XDP program may adjust header */ 5225 skb_copy_to_linear_data(skb, xdp.data, buf1_len); 5226 skb_put(skb, buf1_len); 5227 5228 /* Data payload copied into SKB, page ready for recycle */ 5229 page_pool_recycle_direct(rx_q->page_pool, buf->page); 5230 buf->page = NULL; 5231 } else if (buf1_len) { 5232 dma_sync_single_for_cpu(priv->device, buf->addr, 5233 buf1_len, dma_dir); 5234 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, 5235 buf->page, buf->page_offset, buf1_len, 5236 priv->dma_buf_sz); 5237 5238 /* Data payload appended into SKB */ 5239 page_pool_release_page(rx_q->page_pool, buf->page); 5240 buf->page = NULL; 5241 } 5242 5243 if (buf2_len) { 5244 dma_sync_single_for_cpu(priv->device, buf->sec_addr, 5245 buf2_len, dma_dir); 5246 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, 5247 buf->sec_page, 0, buf2_len, 5248 priv->dma_buf_sz); 5249 5250 /* Data payload appended into SKB */ 5251 page_pool_release_page(rx_q->page_pool, buf->sec_page); 5252 buf->sec_page = NULL; 5253 } 5254 5255 drain_data: 5256 if (likely(status & rx_not_ls)) 5257 goto read_again; 5258 if (!skb) 5259 continue; 5260 5261 /* Got entire packet into SKB. Finish it. */ 5262 5263 stmmac_get_rx_hwtstamp(priv, p, np, skb); 5264 stmmac_rx_vlan(priv->dev, skb); 5265 skb->protocol = eth_type_trans(skb, priv->dev); 5266 5267 if (unlikely(!coe)) 5268 skb_checksum_none_assert(skb); 5269 else 5270 skb->ip_summed = CHECKSUM_UNNECESSARY; 5271 5272 if (!stmmac_get_rx_hash(priv, p, &hash, &hash_type)) 5273 skb_set_hash(skb, hash, hash_type); 5274 5275 skb_record_rx_queue(skb, queue); 5276 napi_gro_receive(&ch->rx_napi, skb); 5277 skb = NULL; 5278 5279 priv->dev->stats.rx_packets++; 5280 priv->dev->stats.rx_bytes += len; 5281 count++; 5282 } 5283 5284 if (status & rx_not_ls || skb) { 5285 rx_q->state_saved = true; 5286 rx_q->state.skb = skb; 5287 rx_q->state.error = error; 5288 rx_q->state.len = len; 5289 } 5290 5291 stmmac_finalize_xdp_rx(priv, xdp_status); 5292 5293 stmmac_rx_refill(priv, queue); 5294 5295 priv->xstats.rx_pkt_n += count; 5296 5297 return count; 5298 } 5299 5300 static int stmmac_napi_poll_rx(struct napi_struct *napi, int budget) 5301 { 5302 struct stmmac_channel *ch = 5303 container_of(napi, struct stmmac_channel, rx_napi); 5304 struct stmmac_priv *priv = ch->priv_data; 5305 u32 chan = ch->index; 5306 int work_done; 5307 5308 priv->xstats.napi_poll++; 5309 5310 work_done = stmmac_rx(priv, budget, chan); 5311 if (work_done < budget && napi_complete_done(napi, work_done)) { 5312 unsigned long flags; 5313 5314 spin_lock_irqsave(&ch->lock, flags); 5315 stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 1, 0); 5316 spin_unlock_irqrestore(&ch->lock, flags); 5317 } 5318 5319 return work_done; 5320 } 5321 5322 static int stmmac_napi_poll_tx(struct napi_struct *napi, int budget) 5323 { 5324 struct stmmac_channel *ch = 5325 container_of(napi, struct stmmac_channel, tx_napi); 5326 struct stmmac_priv *priv = ch->priv_data; 5327 u32 chan = ch->index; 5328 int work_done; 5329 5330 priv->xstats.napi_poll++; 5331 5332 work_done = stmmac_tx_clean(priv, budget, chan); 5333 work_done = min(work_done, budget); 5334 5335 if (work_done < budget && napi_complete_done(napi, work_done)) { 5336 unsigned long flags; 5337 5338 spin_lock_irqsave(&ch->lock, flags); 5339 stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 0, 1); 5340 spin_unlock_irqrestore(&ch->lock, flags); 5341 } 5342 5343 return work_done; 5344 } 5345 5346 static int stmmac_napi_poll_rxtx(struct napi_struct *napi, int budget) 5347 { 5348 struct stmmac_channel *ch = 5349 container_of(napi, struct stmmac_channel, rxtx_napi); 5350 struct stmmac_priv *priv = ch->priv_data; 5351 int rx_done, tx_done; 5352 u32 chan = ch->index; 5353 5354 priv->xstats.napi_poll++; 5355 5356 tx_done = stmmac_tx_clean(priv, budget, chan); 5357 tx_done = min(tx_done, budget); 5358 5359 rx_done = stmmac_rx_zc(priv, budget, chan); 5360 5361 /* If either TX or RX work is not complete, return budget 5362 * and keep pooling 5363 */ 5364 if (tx_done >= budget || rx_done >= budget) 5365 return budget; 5366 5367 /* all work done, exit the polling mode */ 5368 if (napi_complete_done(napi, rx_done)) { 5369 unsigned long flags; 5370 5371 spin_lock_irqsave(&ch->lock, flags); 5372 /* Both RX and TX work done are compelte, 5373 * so enable both RX & TX IRQs. 5374 */ 5375 stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 1, 1); 5376 spin_unlock_irqrestore(&ch->lock, flags); 5377 } 5378 5379 return min(rx_done, budget - 1); 5380 } 5381 5382 /** 5383 * stmmac_tx_timeout 5384 * @dev : Pointer to net device structure 5385 * @txqueue: the index of the hanging transmit queue 5386 * Description: this function is called when a packet transmission fails to 5387 * complete within a reasonable time. The driver will mark the error in the 5388 * netdev structure and arrange for the device to be reset to a sane state 5389 * in order to transmit a new packet. 5390 */ 5391 static void stmmac_tx_timeout(struct net_device *dev, unsigned int txqueue) 5392 { 5393 struct stmmac_priv *priv = netdev_priv(dev); 5394 5395 stmmac_global_err(priv); 5396 } 5397 5398 /** 5399 * stmmac_set_rx_mode - entry point for multicast addressing 5400 * @dev : pointer to the device structure 5401 * Description: 5402 * This function is a driver entry point which gets called by the kernel 5403 * whenever multicast addresses must be enabled/disabled. 5404 * Return value: 5405 * void. 5406 */ 5407 static void stmmac_set_rx_mode(struct net_device *dev) 5408 { 5409 struct stmmac_priv *priv = netdev_priv(dev); 5410 5411 stmmac_set_filter(priv, priv->hw, dev); 5412 } 5413 5414 /** 5415 * stmmac_change_mtu - entry point to change MTU size for the device. 5416 * @dev : device pointer. 5417 * @new_mtu : the new MTU size for the device. 5418 * Description: the Maximum Transfer Unit (MTU) is used by the network layer 5419 * to drive packet transmission. Ethernet has an MTU of 1500 octets 5420 * (ETH_DATA_LEN). This value can be changed with ifconfig. 5421 * Return value: 5422 * 0 on success and an appropriate (-)ve integer as defined in errno.h 5423 * file on failure. 5424 */ 5425 static int stmmac_change_mtu(struct net_device *dev, int new_mtu) 5426 { 5427 struct stmmac_priv *priv = netdev_priv(dev); 5428 int txfifosz = priv->plat->tx_fifo_size; 5429 const int mtu = new_mtu; 5430 5431 if (txfifosz == 0) 5432 txfifosz = priv->dma_cap.tx_fifo_size; 5433 5434 txfifosz /= priv->plat->tx_queues_to_use; 5435 5436 if (netif_running(dev)) { 5437 netdev_err(priv->dev, "must be stopped to change its MTU\n"); 5438 return -EBUSY; 5439 } 5440 5441 if (stmmac_xdp_is_enabled(priv) && new_mtu > ETH_DATA_LEN) { 5442 netdev_dbg(priv->dev, "Jumbo frames not supported for XDP\n"); 5443 return -EINVAL; 5444 } 5445 5446 new_mtu = STMMAC_ALIGN(new_mtu); 5447 5448 /* If condition true, FIFO is too small or MTU too large */ 5449 if ((txfifosz < new_mtu) || (new_mtu > BUF_SIZE_16KiB)) 5450 return -EINVAL; 5451 5452 dev->mtu = mtu; 5453 5454 netdev_update_features(dev); 5455 5456 return 0; 5457 } 5458 5459 static netdev_features_t stmmac_fix_features(struct net_device *dev, 5460 netdev_features_t features) 5461 { 5462 struct stmmac_priv *priv = netdev_priv(dev); 5463 5464 if (priv->plat->rx_coe == STMMAC_RX_COE_NONE) 5465 features &= ~NETIF_F_RXCSUM; 5466 5467 if (!priv->plat->tx_coe) 5468 features &= ~NETIF_F_CSUM_MASK; 5469 5470 /* Some GMAC devices have a bugged Jumbo frame support that 5471 * needs to have the Tx COE disabled for oversized frames 5472 * (due to limited buffer sizes). In this case we disable 5473 * the TX csum insertion in the TDES and not use SF. 5474 */ 5475 if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN)) 5476 features &= ~NETIF_F_CSUM_MASK; 5477 5478 /* Disable tso if asked by ethtool */ 5479 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) { 5480 if (features & NETIF_F_TSO) 5481 priv->tso = true; 5482 else 5483 priv->tso = false; 5484 } 5485 5486 return features; 5487 } 5488 5489 static int stmmac_set_features(struct net_device *netdev, 5490 netdev_features_t features) 5491 { 5492 struct stmmac_priv *priv = netdev_priv(netdev); 5493 bool sph_en; 5494 u32 chan; 5495 5496 /* Keep the COE Type in case of csum is supporting */ 5497 if (features & NETIF_F_RXCSUM) 5498 priv->hw->rx_csum = priv->plat->rx_coe; 5499 else 5500 priv->hw->rx_csum = 0; 5501 /* No check needed because rx_coe has been set before and it will be 5502 * fixed in case of issue. 5503 */ 5504 stmmac_rx_ipc(priv, priv->hw); 5505 5506 sph_en = (priv->hw->rx_csum > 0) && priv->sph; 5507 5508 for (chan = 0; chan < priv->plat->rx_queues_to_use; chan++) 5509 stmmac_enable_sph(priv, priv->ioaddr, sph_en, chan); 5510 5511 return 0; 5512 } 5513 5514 static void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) 5515 { 5516 struct stmmac_fpe_cfg *fpe_cfg = priv->plat->fpe_cfg; 5517 enum stmmac_fpe_state *lo_state = &fpe_cfg->lo_fpe_state; 5518 enum stmmac_fpe_state *lp_state = &fpe_cfg->lp_fpe_state; 5519 bool *hs_enable = &fpe_cfg->hs_enable; 5520 5521 if (status == FPE_EVENT_UNKNOWN || !*hs_enable) 5522 return; 5523 5524 /* If LP has sent verify mPacket, LP is FPE capable */ 5525 if ((status & FPE_EVENT_RVER) == FPE_EVENT_RVER) { 5526 if (*lp_state < FPE_STATE_CAPABLE) 5527 *lp_state = FPE_STATE_CAPABLE; 5528 5529 /* If user has requested FPE enable, quickly response */ 5530 if (*hs_enable) 5531 stmmac_fpe_send_mpacket(priv, priv->ioaddr, 5532 MPACKET_RESPONSE); 5533 } 5534 5535 /* If Local has sent verify mPacket, Local is FPE capable */ 5536 if ((status & FPE_EVENT_TVER) == FPE_EVENT_TVER) { 5537 if (*lo_state < FPE_STATE_CAPABLE) 5538 *lo_state = FPE_STATE_CAPABLE; 5539 } 5540 5541 /* If LP has sent response mPacket, LP is entering FPE ON */ 5542 if ((status & FPE_EVENT_RRSP) == FPE_EVENT_RRSP) 5543 *lp_state = FPE_STATE_ENTERING_ON; 5544 5545 /* If Local has sent response mPacket, Local is entering FPE ON */ 5546 if ((status & FPE_EVENT_TRSP) == FPE_EVENT_TRSP) 5547 *lo_state = FPE_STATE_ENTERING_ON; 5548 5549 if (!test_bit(__FPE_REMOVING, &priv->fpe_task_state) && 5550 !test_and_set_bit(__FPE_TASK_SCHED, &priv->fpe_task_state) && 5551 priv->fpe_wq) { 5552 queue_work(priv->fpe_wq, &priv->fpe_task); 5553 } 5554 } 5555 5556 static void stmmac_common_interrupt(struct stmmac_priv *priv) 5557 { 5558 u32 rx_cnt = priv->plat->rx_queues_to_use; 5559 u32 tx_cnt = priv->plat->tx_queues_to_use; 5560 u32 queues_count; 5561 u32 queue; 5562 bool xmac; 5563 5564 xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; 5565 queues_count = (rx_cnt > tx_cnt) ? rx_cnt : tx_cnt; 5566 5567 if (priv->irq_wake) 5568 pm_wakeup_event(priv->device, 0); 5569 5570 if (priv->dma_cap.estsel) 5571 stmmac_est_irq_status(priv, priv->ioaddr, priv->dev, 5572 &priv->xstats, tx_cnt); 5573 5574 if (priv->dma_cap.fpesel) { 5575 int status = stmmac_fpe_irq_status(priv, priv->ioaddr, 5576 priv->dev); 5577 5578 stmmac_fpe_event_status(priv, status); 5579 } 5580 5581 /* To handle GMAC own interrupts */ 5582 if ((priv->plat->has_gmac) || xmac) { 5583 int status = stmmac_host_irq_status(priv, priv->hw, &priv->xstats); 5584 5585 if (unlikely(status)) { 5586 /* For LPI we need to save the tx status */ 5587 if (status & CORE_IRQ_TX_PATH_IN_LPI_MODE) 5588 priv->tx_path_in_lpi_mode = true; 5589 if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE) 5590 priv->tx_path_in_lpi_mode = false; 5591 } 5592 5593 for (queue = 0; queue < queues_count; queue++) { 5594 status = stmmac_host_mtl_irq_status(priv, priv->hw, 5595 queue); 5596 } 5597 5598 /* PCS link status */ 5599 if (priv->hw->pcs) { 5600 if (priv->xstats.pcs_link) 5601 netif_carrier_on(priv->dev); 5602 else 5603 netif_carrier_off(priv->dev); 5604 } 5605 5606 stmmac_timestamp_interrupt(priv, priv); 5607 } 5608 } 5609 5610 /** 5611 * stmmac_interrupt - main ISR 5612 * @irq: interrupt number. 5613 * @dev_id: to pass the net device pointer. 5614 * Description: this is the main driver interrupt service routine. 5615 * It can call: 5616 * o DMA service routine (to manage incoming frame reception and transmission 5617 * status) 5618 * o Core interrupts to manage: remote wake-up, management counter, LPI 5619 * interrupts. 5620 */ 5621 static irqreturn_t stmmac_interrupt(int irq, void *dev_id) 5622 { 5623 struct net_device *dev = (struct net_device *)dev_id; 5624 struct stmmac_priv *priv = netdev_priv(dev); 5625 5626 /* Check if adapter is up */ 5627 if (test_bit(STMMAC_DOWN, &priv->state)) 5628 return IRQ_HANDLED; 5629 5630 /* Check if a fatal error happened */ 5631 if (stmmac_safety_feat_interrupt(priv)) 5632 return IRQ_HANDLED; 5633 5634 /* To handle Common interrupts */ 5635 stmmac_common_interrupt(priv); 5636 5637 /* To handle DMA interrupts */ 5638 stmmac_dma_interrupt(priv); 5639 5640 return IRQ_HANDLED; 5641 } 5642 5643 static irqreturn_t stmmac_mac_interrupt(int irq, void *dev_id) 5644 { 5645 struct net_device *dev = (struct net_device *)dev_id; 5646 struct stmmac_priv *priv = netdev_priv(dev); 5647 5648 if (unlikely(!dev)) { 5649 netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__); 5650 return IRQ_NONE; 5651 } 5652 5653 /* Check if adapter is up */ 5654 if (test_bit(STMMAC_DOWN, &priv->state)) 5655 return IRQ_HANDLED; 5656 5657 /* To handle Common interrupts */ 5658 stmmac_common_interrupt(priv); 5659 5660 return IRQ_HANDLED; 5661 } 5662 5663 static irqreturn_t stmmac_safety_interrupt(int irq, void *dev_id) 5664 { 5665 struct net_device *dev = (struct net_device *)dev_id; 5666 struct stmmac_priv *priv = netdev_priv(dev); 5667 5668 if (unlikely(!dev)) { 5669 netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__); 5670 return IRQ_NONE; 5671 } 5672 5673 /* Check if adapter is up */ 5674 if (test_bit(STMMAC_DOWN, &priv->state)) 5675 return IRQ_HANDLED; 5676 5677 /* Check if a fatal error happened */ 5678 stmmac_safety_feat_interrupt(priv); 5679 5680 return IRQ_HANDLED; 5681 } 5682 5683 static irqreturn_t stmmac_msi_intr_tx(int irq, void *data) 5684 { 5685 struct stmmac_tx_queue *tx_q = (struct stmmac_tx_queue *)data; 5686 int chan = tx_q->queue_index; 5687 struct stmmac_priv *priv; 5688 int status; 5689 5690 priv = container_of(tx_q, struct stmmac_priv, tx_queue[chan]); 5691 5692 if (unlikely(!data)) { 5693 netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__); 5694 return IRQ_NONE; 5695 } 5696 5697 /* Check if adapter is up */ 5698 if (test_bit(STMMAC_DOWN, &priv->state)) 5699 return IRQ_HANDLED; 5700 5701 status = stmmac_napi_check(priv, chan, DMA_DIR_TX); 5702 5703 if (unlikely(status & tx_hard_error_bump_tc)) { 5704 /* Try to bump up the dma threshold on this failure */ 5705 if (unlikely(priv->xstats.threshold != SF_DMA_MODE) && 5706 tc <= 256) { 5707 tc += 64; 5708 if (priv->plat->force_thresh_dma_mode) 5709 stmmac_set_dma_operation_mode(priv, 5710 tc, 5711 tc, 5712 chan); 5713 else 5714 stmmac_set_dma_operation_mode(priv, 5715 tc, 5716 SF_DMA_MODE, 5717 chan); 5718 priv->xstats.threshold = tc; 5719 } 5720 } else if (unlikely(status == tx_hard_error)) { 5721 stmmac_tx_err(priv, chan); 5722 } 5723 5724 return IRQ_HANDLED; 5725 } 5726 5727 static irqreturn_t stmmac_msi_intr_rx(int irq, void *data) 5728 { 5729 struct stmmac_rx_queue *rx_q = (struct stmmac_rx_queue *)data; 5730 int chan = rx_q->queue_index; 5731 struct stmmac_priv *priv; 5732 5733 priv = container_of(rx_q, struct stmmac_priv, rx_queue[chan]); 5734 5735 if (unlikely(!data)) { 5736 netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__); 5737 return IRQ_NONE; 5738 } 5739 5740 /* Check if adapter is up */ 5741 if (test_bit(STMMAC_DOWN, &priv->state)) 5742 return IRQ_HANDLED; 5743 5744 stmmac_napi_check(priv, chan, DMA_DIR_RX); 5745 5746 return IRQ_HANDLED; 5747 } 5748 5749 #ifdef CONFIG_NET_POLL_CONTROLLER 5750 /* Polling receive - used by NETCONSOLE and other diagnostic tools 5751 * to allow network I/O with interrupts disabled. 5752 */ 5753 static void stmmac_poll_controller(struct net_device *dev) 5754 { 5755 struct stmmac_priv *priv = netdev_priv(dev); 5756 int i; 5757 5758 /* If adapter is down, do nothing */ 5759 if (test_bit(STMMAC_DOWN, &priv->state)) 5760 return; 5761 5762 if (priv->plat->multi_msi_en) { 5763 for (i = 0; i < priv->plat->rx_queues_to_use; i++) 5764 stmmac_msi_intr_rx(0, &priv->rx_queue[i]); 5765 5766 for (i = 0; i < priv->plat->tx_queues_to_use; i++) 5767 stmmac_msi_intr_tx(0, &priv->tx_queue[i]); 5768 } else { 5769 disable_irq(dev->irq); 5770 stmmac_interrupt(dev->irq, dev); 5771 enable_irq(dev->irq); 5772 } 5773 } 5774 #endif 5775 5776 /** 5777 * stmmac_ioctl - Entry point for the Ioctl 5778 * @dev: Device pointer. 5779 * @rq: An IOCTL specefic structure, that can contain a pointer to 5780 * a proprietary structure used to pass information to the driver. 5781 * @cmd: IOCTL command 5782 * Description: 5783 * Currently it supports the phy_mii_ioctl(...) and HW time stamping. 5784 */ 5785 static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 5786 { 5787 struct stmmac_priv *priv = netdev_priv (dev); 5788 int ret = -EOPNOTSUPP; 5789 5790 if (!netif_running(dev)) 5791 return -EINVAL; 5792 5793 switch (cmd) { 5794 case SIOCGMIIPHY: 5795 case SIOCGMIIREG: 5796 case SIOCSMIIREG: 5797 ret = phylink_mii_ioctl(priv->phylink, rq, cmd); 5798 break; 5799 case SIOCSHWTSTAMP: 5800 ret = stmmac_hwtstamp_set(dev, rq); 5801 break; 5802 case SIOCGHWTSTAMP: 5803 ret = stmmac_hwtstamp_get(dev, rq); 5804 break; 5805 default: 5806 break; 5807 } 5808 5809 return ret; 5810 } 5811 5812 static int stmmac_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 5813 void *cb_priv) 5814 { 5815 struct stmmac_priv *priv = cb_priv; 5816 int ret = -EOPNOTSUPP; 5817 5818 if (!tc_cls_can_offload_and_chain0(priv->dev, type_data)) 5819 return ret; 5820 5821 __stmmac_disable_all_queues(priv); 5822 5823 switch (type) { 5824 case TC_SETUP_CLSU32: 5825 ret = stmmac_tc_setup_cls_u32(priv, priv, type_data); 5826 break; 5827 case TC_SETUP_CLSFLOWER: 5828 ret = stmmac_tc_setup_cls(priv, priv, type_data); 5829 break; 5830 default: 5831 break; 5832 } 5833 5834 stmmac_enable_all_queues(priv); 5835 return ret; 5836 } 5837 5838 static LIST_HEAD(stmmac_block_cb_list); 5839 5840 static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type, 5841 void *type_data) 5842 { 5843 struct stmmac_priv *priv = netdev_priv(ndev); 5844 5845 switch (type) { 5846 case TC_SETUP_BLOCK: 5847 return flow_block_cb_setup_simple(type_data, 5848 &stmmac_block_cb_list, 5849 stmmac_setup_tc_block_cb, 5850 priv, priv, true); 5851 case TC_SETUP_QDISC_CBS: 5852 return stmmac_tc_setup_cbs(priv, priv, type_data); 5853 case TC_SETUP_QDISC_TAPRIO: 5854 return stmmac_tc_setup_taprio(priv, priv, type_data); 5855 case TC_SETUP_QDISC_ETF: 5856 return stmmac_tc_setup_etf(priv, priv, type_data); 5857 default: 5858 return -EOPNOTSUPP; 5859 } 5860 } 5861 5862 static u16 stmmac_select_queue(struct net_device *dev, struct sk_buff *skb, 5863 struct net_device *sb_dev) 5864 { 5865 int gso = skb_shinfo(skb)->gso_type; 5866 5867 if (gso & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6 | SKB_GSO_UDP_L4)) { 5868 /* 5869 * There is no way to determine the number of TSO/USO 5870 * capable Queues. Let's use always the Queue 0 5871 * because if TSO/USO is supported then at least this 5872 * one will be capable. 5873 */ 5874 return 0; 5875 } 5876 5877 return netdev_pick_tx(dev, skb, NULL) % dev->real_num_tx_queues; 5878 } 5879 5880 static int stmmac_set_mac_address(struct net_device *ndev, void *addr) 5881 { 5882 struct stmmac_priv *priv = netdev_priv(ndev); 5883 int ret = 0; 5884 5885 ret = pm_runtime_get_sync(priv->device); 5886 if (ret < 0) { 5887 pm_runtime_put_noidle(priv->device); 5888 return ret; 5889 } 5890 5891 ret = eth_mac_addr(ndev, addr); 5892 if (ret) 5893 goto set_mac_error; 5894 5895 stmmac_set_umac_addr(priv, priv->hw, ndev->dev_addr, 0); 5896 5897 set_mac_error: 5898 pm_runtime_put(priv->device); 5899 5900 return ret; 5901 } 5902 5903 #ifdef CONFIG_DEBUG_FS 5904 static struct dentry *stmmac_fs_dir; 5905 5906 static void sysfs_display_ring(void *head, int size, int extend_desc, 5907 struct seq_file *seq, dma_addr_t dma_phy_addr) 5908 { 5909 int i; 5910 struct dma_extended_desc *ep = (struct dma_extended_desc *)head; 5911 struct dma_desc *p = (struct dma_desc *)head; 5912 dma_addr_t dma_addr; 5913 5914 for (i = 0; i < size; i++) { 5915 if (extend_desc) { 5916 dma_addr = dma_phy_addr + i * sizeof(*ep); 5917 seq_printf(seq, "%d [%pad]: 0x%x 0x%x 0x%x 0x%x\n", 5918 i, &dma_addr, 5919 le32_to_cpu(ep->basic.des0), 5920 le32_to_cpu(ep->basic.des1), 5921 le32_to_cpu(ep->basic.des2), 5922 le32_to_cpu(ep->basic.des3)); 5923 ep++; 5924 } else { 5925 dma_addr = dma_phy_addr + i * sizeof(*p); 5926 seq_printf(seq, "%d [%pad]: 0x%x 0x%x 0x%x 0x%x\n", 5927 i, &dma_addr, 5928 le32_to_cpu(p->des0), le32_to_cpu(p->des1), 5929 le32_to_cpu(p->des2), le32_to_cpu(p->des3)); 5930 p++; 5931 } 5932 seq_printf(seq, "\n"); 5933 } 5934 } 5935 5936 static int stmmac_rings_status_show(struct seq_file *seq, void *v) 5937 { 5938 struct net_device *dev = seq->private; 5939 struct stmmac_priv *priv = netdev_priv(dev); 5940 u32 rx_count = priv->plat->rx_queues_to_use; 5941 u32 tx_count = priv->plat->tx_queues_to_use; 5942 u32 queue; 5943 5944 if ((dev->flags & IFF_UP) == 0) 5945 return 0; 5946 5947 for (queue = 0; queue < rx_count; queue++) { 5948 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 5949 5950 seq_printf(seq, "RX Queue %d:\n", queue); 5951 5952 if (priv->extend_desc) { 5953 seq_printf(seq, "Extended descriptor ring:\n"); 5954 sysfs_display_ring((void *)rx_q->dma_erx, 5955 priv->dma_rx_size, 1, seq, rx_q->dma_rx_phy); 5956 } else { 5957 seq_printf(seq, "Descriptor ring:\n"); 5958 sysfs_display_ring((void *)rx_q->dma_rx, 5959 priv->dma_rx_size, 0, seq, rx_q->dma_rx_phy); 5960 } 5961 } 5962 5963 for (queue = 0; queue < tx_count; queue++) { 5964 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 5965 5966 seq_printf(seq, "TX Queue %d:\n", queue); 5967 5968 if (priv->extend_desc) { 5969 seq_printf(seq, "Extended descriptor ring:\n"); 5970 sysfs_display_ring((void *)tx_q->dma_etx, 5971 priv->dma_tx_size, 1, seq, tx_q->dma_tx_phy); 5972 } else if (!(tx_q->tbs & STMMAC_TBS_AVAIL)) { 5973 seq_printf(seq, "Descriptor ring:\n"); 5974 sysfs_display_ring((void *)tx_q->dma_tx, 5975 priv->dma_tx_size, 0, seq, tx_q->dma_tx_phy); 5976 } 5977 } 5978 5979 return 0; 5980 } 5981 DEFINE_SHOW_ATTRIBUTE(stmmac_rings_status); 5982 5983 static int stmmac_dma_cap_show(struct seq_file *seq, void *v) 5984 { 5985 struct net_device *dev = seq->private; 5986 struct stmmac_priv *priv = netdev_priv(dev); 5987 5988 if (!priv->hw_cap_support) { 5989 seq_printf(seq, "DMA HW features not supported\n"); 5990 return 0; 5991 } 5992 5993 seq_printf(seq, "==============================\n"); 5994 seq_printf(seq, "\tDMA HW features\n"); 5995 seq_printf(seq, "==============================\n"); 5996 5997 seq_printf(seq, "\t10/100 Mbps: %s\n", 5998 (priv->dma_cap.mbps_10_100) ? "Y" : "N"); 5999 seq_printf(seq, "\t1000 Mbps: %s\n", 6000 (priv->dma_cap.mbps_1000) ? "Y" : "N"); 6001 seq_printf(seq, "\tHalf duplex: %s\n", 6002 (priv->dma_cap.half_duplex) ? "Y" : "N"); 6003 seq_printf(seq, "\tHash Filter: %s\n", 6004 (priv->dma_cap.hash_filter) ? "Y" : "N"); 6005 seq_printf(seq, "\tMultiple MAC address registers: %s\n", 6006 (priv->dma_cap.multi_addr) ? "Y" : "N"); 6007 seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfaces): %s\n", 6008 (priv->dma_cap.pcs) ? "Y" : "N"); 6009 seq_printf(seq, "\tSMA (MDIO) Interface: %s\n", 6010 (priv->dma_cap.sma_mdio) ? "Y" : "N"); 6011 seq_printf(seq, "\tPMT Remote wake up: %s\n", 6012 (priv->dma_cap.pmt_remote_wake_up) ? "Y" : "N"); 6013 seq_printf(seq, "\tPMT Magic Frame: %s\n", 6014 (priv->dma_cap.pmt_magic_frame) ? "Y" : "N"); 6015 seq_printf(seq, "\tRMON module: %s\n", 6016 (priv->dma_cap.rmon) ? "Y" : "N"); 6017 seq_printf(seq, "\tIEEE 1588-2002 Time Stamp: %s\n", 6018 (priv->dma_cap.time_stamp) ? "Y" : "N"); 6019 seq_printf(seq, "\tIEEE 1588-2008 Advanced Time Stamp: %s\n", 6020 (priv->dma_cap.atime_stamp) ? "Y" : "N"); 6021 seq_printf(seq, "\t802.3az - Energy-Efficient Ethernet (EEE): %s\n", 6022 (priv->dma_cap.eee) ? "Y" : "N"); 6023 seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N"); 6024 seq_printf(seq, "\tChecksum Offload in TX: %s\n", 6025 (priv->dma_cap.tx_coe) ? "Y" : "N"); 6026 if (priv->synopsys_id >= DWMAC_CORE_4_00) { 6027 seq_printf(seq, "\tIP Checksum Offload in RX: %s\n", 6028 (priv->dma_cap.rx_coe) ? "Y" : "N"); 6029 } else { 6030 seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n", 6031 (priv->dma_cap.rx_coe_type1) ? "Y" : "N"); 6032 seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n", 6033 (priv->dma_cap.rx_coe_type2) ? "Y" : "N"); 6034 } 6035 seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n", 6036 (priv->dma_cap.rxfifo_over_2048) ? "Y" : "N"); 6037 seq_printf(seq, "\tNumber of Additional RX channel: %d\n", 6038 priv->dma_cap.number_rx_channel); 6039 seq_printf(seq, "\tNumber of Additional TX channel: %d\n", 6040 priv->dma_cap.number_tx_channel); 6041 seq_printf(seq, "\tNumber of Additional RX queues: %d\n", 6042 priv->dma_cap.number_rx_queues); 6043 seq_printf(seq, "\tNumber of Additional TX queues: %d\n", 6044 priv->dma_cap.number_tx_queues); 6045 seq_printf(seq, "\tEnhanced descriptors: %s\n", 6046 (priv->dma_cap.enh_desc) ? "Y" : "N"); 6047 seq_printf(seq, "\tTX Fifo Size: %d\n", priv->dma_cap.tx_fifo_size); 6048 seq_printf(seq, "\tRX Fifo Size: %d\n", priv->dma_cap.rx_fifo_size); 6049 seq_printf(seq, "\tHash Table Size: %d\n", priv->dma_cap.hash_tb_sz); 6050 seq_printf(seq, "\tTSO: %s\n", priv->dma_cap.tsoen ? "Y" : "N"); 6051 seq_printf(seq, "\tNumber of PPS Outputs: %d\n", 6052 priv->dma_cap.pps_out_num); 6053 seq_printf(seq, "\tSafety Features: %s\n", 6054 priv->dma_cap.asp ? "Y" : "N"); 6055 seq_printf(seq, "\tFlexible RX Parser: %s\n", 6056 priv->dma_cap.frpsel ? "Y" : "N"); 6057 seq_printf(seq, "\tEnhanced Addressing: %d\n", 6058 priv->dma_cap.addr64); 6059 seq_printf(seq, "\tReceive Side Scaling: %s\n", 6060 priv->dma_cap.rssen ? "Y" : "N"); 6061 seq_printf(seq, "\tVLAN Hash Filtering: %s\n", 6062 priv->dma_cap.vlhash ? "Y" : "N"); 6063 seq_printf(seq, "\tSplit Header: %s\n", 6064 priv->dma_cap.sphen ? "Y" : "N"); 6065 seq_printf(seq, "\tVLAN TX Insertion: %s\n", 6066 priv->dma_cap.vlins ? "Y" : "N"); 6067 seq_printf(seq, "\tDouble VLAN: %s\n", 6068 priv->dma_cap.dvlan ? "Y" : "N"); 6069 seq_printf(seq, "\tNumber of L3/L4 Filters: %d\n", 6070 priv->dma_cap.l3l4fnum); 6071 seq_printf(seq, "\tARP Offloading: %s\n", 6072 priv->dma_cap.arpoffsel ? "Y" : "N"); 6073 seq_printf(seq, "\tEnhancements to Scheduled Traffic (EST): %s\n", 6074 priv->dma_cap.estsel ? "Y" : "N"); 6075 seq_printf(seq, "\tFrame Preemption (FPE): %s\n", 6076 priv->dma_cap.fpesel ? "Y" : "N"); 6077 seq_printf(seq, "\tTime-Based Scheduling (TBS): %s\n", 6078 priv->dma_cap.tbssel ? "Y" : "N"); 6079 return 0; 6080 } 6081 DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap); 6082 6083 /* Use network device events to rename debugfs file entries. 6084 */ 6085 static int stmmac_device_event(struct notifier_block *unused, 6086 unsigned long event, void *ptr) 6087 { 6088 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 6089 struct stmmac_priv *priv = netdev_priv(dev); 6090 6091 if (dev->netdev_ops != &stmmac_netdev_ops) 6092 goto done; 6093 6094 switch (event) { 6095 case NETDEV_CHANGENAME: 6096 if (priv->dbgfs_dir) 6097 priv->dbgfs_dir = debugfs_rename(stmmac_fs_dir, 6098 priv->dbgfs_dir, 6099 stmmac_fs_dir, 6100 dev->name); 6101 break; 6102 } 6103 done: 6104 return NOTIFY_DONE; 6105 } 6106 6107 static struct notifier_block stmmac_notifier = { 6108 .notifier_call = stmmac_device_event, 6109 }; 6110 6111 static void stmmac_init_fs(struct net_device *dev) 6112 { 6113 struct stmmac_priv *priv = netdev_priv(dev); 6114 6115 rtnl_lock(); 6116 6117 /* Create per netdev entries */ 6118 priv->dbgfs_dir = debugfs_create_dir(dev->name, stmmac_fs_dir); 6119 6120 /* Entry to report DMA RX/TX rings */ 6121 debugfs_create_file("descriptors_status", 0444, priv->dbgfs_dir, dev, 6122 &stmmac_rings_status_fops); 6123 6124 /* Entry to report the DMA HW features */ 6125 debugfs_create_file("dma_cap", 0444, priv->dbgfs_dir, dev, 6126 &stmmac_dma_cap_fops); 6127 6128 rtnl_unlock(); 6129 } 6130 6131 static void stmmac_exit_fs(struct net_device *dev) 6132 { 6133 struct stmmac_priv *priv = netdev_priv(dev); 6134 6135 debugfs_remove_recursive(priv->dbgfs_dir); 6136 } 6137 #endif /* CONFIG_DEBUG_FS */ 6138 6139 static u32 stmmac_vid_crc32_le(__le16 vid_le) 6140 { 6141 unsigned char *data = (unsigned char *)&vid_le; 6142 unsigned char data_byte = 0; 6143 u32 crc = ~0x0; 6144 u32 temp = 0; 6145 int i, bits; 6146 6147 bits = get_bitmask_order(VLAN_VID_MASK); 6148 for (i = 0; i < bits; i++) { 6149 if ((i % 8) == 0) 6150 data_byte = data[i / 8]; 6151 6152 temp = ((crc & 1) ^ data_byte) & 1; 6153 crc >>= 1; 6154 data_byte >>= 1; 6155 6156 if (temp) 6157 crc ^= 0xedb88320; 6158 } 6159 6160 return crc; 6161 } 6162 6163 static int stmmac_vlan_update(struct stmmac_priv *priv, bool is_double) 6164 { 6165 u32 crc, hash = 0; 6166 __le16 pmatch = 0; 6167 int count = 0; 6168 u16 vid = 0; 6169 6170 for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) { 6171 __le16 vid_le = cpu_to_le16(vid); 6172 crc = bitrev32(~stmmac_vid_crc32_le(vid_le)) >> 28; 6173 hash |= (1 << crc); 6174 count++; 6175 } 6176 6177 if (!priv->dma_cap.vlhash) { 6178 if (count > 2) /* VID = 0 always passes filter */ 6179 return -EOPNOTSUPP; 6180 6181 pmatch = cpu_to_le16(vid); 6182 hash = 0; 6183 } 6184 6185 return stmmac_update_vlan_hash(priv, priv->hw, hash, pmatch, is_double); 6186 } 6187 6188 static int stmmac_vlan_rx_add_vid(struct net_device *ndev, __be16 proto, u16 vid) 6189 { 6190 struct stmmac_priv *priv = netdev_priv(ndev); 6191 bool is_double = false; 6192 int ret; 6193 6194 if (be16_to_cpu(proto) == ETH_P_8021AD) 6195 is_double = true; 6196 6197 set_bit(vid, priv->active_vlans); 6198 ret = stmmac_vlan_update(priv, is_double); 6199 if (ret) { 6200 clear_bit(vid, priv->active_vlans); 6201 return ret; 6202 } 6203 6204 if (priv->hw->num_vlan) { 6205 ret = stmmac_add_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid); 6206 if (ret) 6207 return ret; 6208 } 6209 6210 return 0; 6211 } 6212 6213 static int stmmac_vlan_rx_kill_vid(struct net_device *ndev, __be16 proto, u16 vid) 6214 { 6215 struct stmmac_priv *priv = netdev_priv(ndev); 6216 bool is_double = false; 6217 int ret; 6218 6219 ret = pm_runtime_get_sync(priv->device); 6220 if (ret < 0) { 6221 pm_runtime_put_noidle(priv->device); 6222 return ret; 6223 } 6224 6225 if (be16_to_cpu(proto) == ETH_P_8021AD) 6226 is_double = true; 6227 6228 clear_bit(vid, priv->active_vlans); 6229 6230 if (priv->hw->num_vlan) { 6231 ret = stmmac_del_hw_vlan_rx_fltr(priv, ndev, priv->hw, proto, vid); 6232 if (ret) 6233 goto del_vlan_error; 6234 } 6235 6236 ret = stmmac_vlan_update(priv, is_double); 6237 6238 del_vlan_error: 6239 pm_runtime_put(priv->device); 6240 6241 return ret; 6242 } 6243 6244 static int stmmac_bpf(struct net_device *dev, struct netdev_bpf *bpf) 6245 { 6246 struct stmmac_priv *priv = netdev_priv(dev); 6247 6248 switch (bpf->command) { 6249 case XDP_SETUP_PROG: 6250 return stmmac_xdp_set_prog(priv, bpf->prog, bpf->extack); 6251 case XDP_SETUP_XSK_POOL: 6252 return stmmac_xdp_setup_pool(priv, bpf->xsk.pool, 6253 bpf->xsk.queue_id); 6254 default: 6255 return -EOPNOTSUPP; 6256 } 6257 } 6258 6259 static int stmmac_xdp_xmit(struct net_device *dev, int num_frames, 6260 struct xdp_frame **frames, u32 flags) 6261 { 6262 struct stmmac_priv *priv = netdev_priv(dev); 6263 int cpu = smp_processor_id(); 6264 struct netdev_queue *nq; 6265 int i, nxmit = 0; 6266 int queue; 6267 6268 if (unlikely(test_bit(STMMAC_DOWN, &priv->state))) 6269 return -ENETDOWN; 6270 6271 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 6272 return -EINVAL; 6273 6274 queue = stmmac_xdp_get_tx_queue(priv, cpu); 6275 nq = netdev_get_tx_queue(priv->dev, queue); 6276 6277 __netif_tx_lock(nq, cpu); 6278 /* Avoids TX time-out as we are sharing with slow path */ 6279 nq->trans_start = jiffies; 6280 6281 for (i = 0; i < num_frames; i++) { 6282 int res; 6283 6284 res = stmmac_xdp_xmit_xdpf(priv, queue, frames[i], true); 6285 if (res == STMMAC_XDP_CONSUMED) 6286 break; 6287 6288 nxmit++; 6289 } 6290 6291 if (flags & XDP_XMIT_FLUSH) { 6292 stmmac_flush_tx_descriptors(priv, queue); 6293 stmmac_tx_timer_arm(priv, queue); 6294 } 6295 6296 __netif_tx_unlock(nq); 6297 6298 return nxmit; 6299 } 6300 6301 void stmmac_disable_rx_queue(struct stmmac_priv *priv, u32 queue) 6302 { 6303 struct stmmac_channel *ch = &priv->channel[queue]; 6304 unsigned long flags; 6305 6306 spin_lock_irqsave(&ch->lock, flags); 6307 stmmac_disable_dma_irq(priv, priv->ioaddr, queue, 1, 0); 6308 spin_unlock_irqrestore(&ch->lock, flags); 6309 6310 stmmac_stop_rx_dma(priv, queue); 6311 __free_dma_rx_desc_resources(priv, queue); 6312 } 6313 6314 void stmmac_enable_rx_queue(struct stmmac_priv *priv, u32 queue) 6315 { 6316 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 6317 struct stmmac_channel *ch = &priv->channel[queue]; 6318 unsigned long flags; 6319 u32 buf_size; 6320 int ret; 6321 6322 ret = __alloc_dma_rx_desc_resources(priv, queue); 6323 if (ret) { 6324 netdev_err(priv->dev, "Failed to alloc RX desc.\n"); 6325 return; 6326 } 6327 6328 ret = __init_dma_rx_desc_rings(priv, queue, GFP_KERNEL); 6329 if (ret) { 6330 __free_dma_rx_desc_resources(priv, queue); 6331 netdev_err(priv->dev, "Failed to init RX desc.\n"); 6332 return; 6333 } 6334 6335 stmmac_clear_rx_descriptors(priv, queue); 6336 6337 stmmac_init_rx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 6338 rx_q->dma_rx_phy, rx_q->queue_index); 6339 6340 rx_q->rx_tail_addr = rx_q->dma_rx_phy + (rx_q->buf_alloc_num * 6341 sizeof(struct dma_desc)); 6342 stmmac_set_rx_tail_ptr(priv, priv->ioaddr, 6343 rx_q->rx_tail_addr, rx_q->queue_index); 6344 6345 if (rx_q->xsk_pool && rx_q->buf_alloc_num) { 6346 buf_size = xsk_pool_get_rx_frame_size(rx_q->xsk_pool); 6347 stmmac_set_dma_bfsize(priv, priv->ioaddr, 6348 buf_size, 6349 rx_q->queue_index); 6350 } else { 6351 stmmac_set_dma_bfsize(priv, priv->ioaddr, 6352 priv->dma_buf_sz, 6353 rx_q->queue_index); 6354 } 6355 6356 stmmac_start_rx_dma(priv, queue); 6357 6358 spin_lock_irqsave(&ch->lock, flags); 6359 stmmac_enable_dma_irq(priv, priv->ioaddr, queue, 1, 0); 6360 spin_unlock_irqrestore(&ch->lock, flags); 6361 } 6362 6363 void stmmac_disable_tx_queue(struct stmmac_priv *priv, u32 queue) 6364 { 6365 struct stmmac_channel *ch = &priv->channel[queue]; 6366 unsigned long flags; 6367 6368 spin_lock_irqsave(&ch->lock, flags); 6369 stmmac_disable_dma_irq(priv, priv->ioaddr, queue, 0, 1); 6370 spin_unlock_irqrestore(&ch->lock, flags); 6371 6372 stmmac_stop_tx_dma(priv, queue); 6373 __free_dma_tx_desc_resources(priv, queue); 6374 } 6375 6376 void stmmac_enable_tx_queue(struct stmmac_priv *priv, u32 queue) 6377 { 6378 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 6379 struct stmmac_channel *ch = &priv->channel[queue]; 6380 unsigned long flags; 6381 int ret; 6382 6383 ret = __alloc_dma_tx_desc_resources(priv, queue); 6384 if (ret) { 6385 netdev_err(priv->dev, "Failed to alloc TX desc.\n"); 6386 return; 6387 } 6388 6389 ret = __init_dma_tx_desc_rings(priv, queue); 6390 if (ret) { 6391 __free_dma_tx_desc_resources(priv, queue); 6392 netdev_err(priv->dev, "Failed to init TX desc.\n"); 6393 return; 6394 } 6395 6396 stmmac_clear_tx_descriptors(priv, queue); 6397 6398 stmmac_init_tx_chan(priv, priv->ioaddr, priv->plat->dma_cfg, 6399 tx_q->dma_tx_phy, tx_q->queue_index); 6400 6401 if (tx_q->tbs & STMMAC_TBS_AVAIL) 6402 stmmac_enable_tbs(priv, priv->ioaddr, 1, tx_q->queue_index); 6403 6404 tx_q->tx_tail_addr = tx_q->dma_tx_phy; 6405 stmmac_set_tx_tail_ptr(priv, priv->ioaddr, 6406 tx_q->tx_tail_addr, tx_q->queue_index); 6407 6408 stmmac_start_tx_dma(priv, queue); 6409 6410 spin_lock_irqsave(&ch->lock, flags); 6411 stmmac_enable_dma_irq(priv, priv->ioaddr, queue, 0, 1); 6412 spin_unlock_irqrestore(&ch->lock, flags); 6413 } 6414 6415 int stmmac_xsk_wakeup(struct net_device *dev, u32 queue, u32 flags) 6416 { 6417 struct stmmac_priv *priv = netdev_priv(dev); 6418 struct stmmac_rx_queue *rx_q; 6419 struct stmmac_tx_queue *tx_q; 6420 struct stmmac_channel *ch; 6421 6422 if (test_bit(STMMAC_DOWN, &priv->state) || 6423 !netif_carrier_ok(priv->dev)) 6424 return -ENETDOWN; 6425 6426 if (!stmmac_xdp_is_enabled(priv)) 6427 return -ENXIO; 6428 6429 if (queue >= priv->plat->rx_queues_to_use || 6430 queue >= priv->plat->tx_queues_to_use) 6431 return -EINVAL; 6432 6433 rx_q = &priv->rx_queue[queue]; 6434 tx_q = &priv->tx_queue[queue]; 6435 ch = &priv->channel[queue]; 6436 6437 if (!rx_q->xsk_pool && !tx_q->xsk_pool) 6438 return -ENXIO; 6439 6440 if (!napi_if_scheduled_mark_missed(&ch->rxtx_napi)) { 6441 /* EQoS does not have per-DMA channel SW interrupt, 6442 * so we schedule RX Napi straight-away. 6443 */ 6444 if (likely(napi_schedule_prep(&ch->rxtx_napi))) 6445 __napi_schedule(&ch->rxtx_napi); 6446 } 6447 6448 return 0; 6449 } 6450 6451 static const struct net_device_ops stmmac_netdev_ops = { 6452 .ndo_open = stmmac_open, 6453 .ndo_start_xmit = stmmac_xmit, 6454 .ndo_stop = stmmac_release, 6455 .ndo_change_mtu = stmmac_change_mtu, 6456 .ndo_fix_features = stmmac_fix_features, 6457 .ndo_set_features = stmmac_set_features, 6458 .ndo_set_rx_mode = stmmac_set_rx_mode, 6459 .ndo_tx_timeout = stmmac_tx_timeout, 6460 .ndo_do_ioctl = stmmac_ioctl, 6461 .ndo_setup_tc = stmmac_setup_tc, 6462 .ndo_select_queue = stmmac_select_queue, 6463 #ifdef CONFIG_NET_POLL_CONTROLLER 6464 .ndo_poll_controller = stmmac_poll_controller, 6465 #endif 6466 .ndo_set_mac_address = stmmac_set_mac_address, 6467 .ndo_vlan_rx_add_vid = stmmac_vlan_rx_add_vid, 6468 .ndo_vlan_rx_kill_vid = stmmac_vlan_rx_kill_vid, 6469 .ndo_bpf = stmmac_bpf, 6470 .ndo_xdp_xmit = stmmac_xdp_xmit, 6471 .ndo_xsk_wakeup = stmmac_xsk_wakeup, 6472 }; 6473 6474 static void stmmac_reset_subtask(struct stmmac_priv *priv) 6475 { 6476 if (!test_and_clear_bit(STMMAC_RESET_REQUESTED, &priv->state)) 6477 return; 6478 if (test_bit(STMMAC_DOWN, &priv->state)) 6479 return; 6480 6481 netdev_err(priv->dev, "Reset adapter.\n"); 6482 6483 rtnl_lock(); 6484 netif_trans_update(priv->dev); 6485 while (test_and_set_bit(STMMAC_RESETING, &priv->state)) 6486 usleep_range(1000, 2000); 6487 6488 set_bit(STMMAC_DOWN, &priv->state); 6489 dev_close(priv->dev); 6490 dev_open(priv->dev, NULL); 6491 clear_bit(STMMAC_DOWN, &priv->state); 6492 clear_bit(STMMAC_RESETING, &priv->state); 6493 rtnl_unlock(); 6494 } 6495 6496 static void stmmac_service_task(struct work_struct *work) 6497 { 6498 struct stmmac_priv *priv = container_of(work, struct stmmac_priv, 6499 service_task); 6500 6501 stmmac_reset_subtask(priv); 6502 clear_bit(STMMAC_SERVICE_SCHED, &priv->state); 6503 } 6504 6505 /** 6506 * stmmac_hw_init - Init the MAC device 6507 * @priv: driver private structure 6508 * Description: this function is to configure the MAC device according to 6509 * some platform parameters or the HW capability register. It prepares the 6510 * driver to use either ring or chain modes and to setup either enhanced or 6511 * normal descriptors. 6512 */ 6513 static int stmmac_hw_init(struct stmmac_priv *priv) 6514 { 6515 int ret; 6516 6517 /* dwmac-sun8i only work in chain mode */ 6518 if (priv->plat->has_sun8i) 6519 chain_mode = 1; 6520 priv->chain_mode = chain_mode; 6521 6522 /* Initialize HW Interface */ 6523 ret = stmmac_hwif_init(priv); 6524 if (ret) 6525 return ret; 6526 6527 /* Get the HW capability (new GMAC newer than 3.50a) */ 6528 priv->hw_cap_support = stmmac_get_hw_features(priv); 6529 if (priv->hw_cap_support) { 6530 dev_info(priv->device, "DMA HW capability register supported\n"); 6531 6532 /* We can override some gmac/dma configuration fields: e.g. 6533 * enh_desc, tx_coe (e.g. that are passed through the 6534 * platform) with the values from the HW capability 6535 * register (if supported). 6536 */ 6537 priv->plat->enh_desc = priv->dma_cap.enh_desc; 6538 priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up; 6539 priv->hw->pmt = priv->plat->pmt; 6540 if (priv->dma_cap.hash_tb_sz) { 6541 priv->hw->multicast_filter_bins = 6542 (BIT(priv->dma_cap.hash_tb_sz) << 5); 6543 priv->hw->mcast_bits_log2 = 6544 ilog2(priv->hw->multicast_filter_bins); 6545 } 6546 6547 /* TXCOE doesn't work in thresh DMA mode */ 6548 if (priv->plat->force_thresh_dma_mode) 6549 priv->plat->tx_coe = 0; 6550 else 6551 priv->plat->tx_coe = priv->dma_cap.tx_coe; 6552 6553 /* In case of GMAC4 rx_coe is from HW cap register. */ 6554 priv->plat->rx_coe = priv->dma_cap.rx_coe; 6555 6556 if (priv->dma_cap.rx_coe_type2) 6557 priv->plat->rx_coe = STMMAC_RX_COE_TYPE2; 6558 else if (priv->dma_cap.rx_coe_type1) 6559 priv->plat->rx_coe = STMMAC_RX_COE_TYPE1; 6560 6561 } else { 6562 dev_info(priv->device, "No HW DMA feature register supported\n"); 6563 } 6564 6565 if (priv->plat->rx_coe) { 6566 priv->hw->rx_csum = priv->plat->rx_coe; 6567 dev_info(priv->device, "RX Checksum Offload Engine supported\n"); 6568 if (priv->synopsys_id < DWMAC_CORE_4_00) 6569 dev_info(priv->device, "COE Type %d\n", priv->hw->rx_csum); 6570 } 6571 if (priv->plat->tx_coe) 6572 dev_info(priv->device, "TX Checksum insertion supported\n"); 6573 6574 if (priv->plat->pmt) { 6575 dev_info(priv->device, "Wake-Up On Lan supported\n"); 6576 device_set_wakeup_capable(priv->device, 1); 6577 } 6578 6579 if (priv->dma_cap.tsoen) 6580 dev_info(priv->device, "TSO supported\n"); 6581 6582 priv->hw->vlan_fail_q_en = priv->plat->vlan_fail_q_en; 6583 priv->hw->vlan_fail_q = priv->plat->vlan_fail_q; 6584 6585 /* Run HW quirks, if any */ 6586 if (priv->hwif_quirks) { 6587 ret = priv->hwif_quirks(priv); 6588 if (ret) 6589 return ret; 6590 } 6591 6592 /* Rx Watchdog is available in the COREs newer than the 3.40. 6593 * In some case, for example on bugged HW this feature 6594 * has to be disable and this can be done by passing the 6595 * riwt_off field from the platform. 6596 */ 6597 if (((priv->synopsys_id >= DWMAC_CORE_3_50) || 6598 (priv->plat->has_xgmac)) && (!priv->plat->riwt_off)) { 6599 priv->use_riwt = 1; 6600 dev_info(priv->device, 6601 "Enable RX Mitigation via HW Watchdog Timer\n"); 6602 } 6603 6604 return 0; 6605 } 6606 6607 static void stmmac_napi_add(struct net_device *dev) 6608 { 6609 struct stmmac_priv *priv = netdev_priv(dev); 6610 u32 queue, maxq; 6611 6612 maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use); 6613 6614 for (queue = 0; queue < maxq; queue++) { 6615 struct stmmac_channel *ch = &priv->channel[queue]; 6616 6617 ch->priv_data = priv; 6618 ch->index = queue; 6619 spin_lock_init(&ch->lock); 6620 6621 if (queue < priv->plat->rx_queues_to_use) { 6622 netif_napi_add(dev, &ch->rx_napi, stmmac_napi_poll_rx, 6623 NAPI_POLL_WEIGHT); 6624 } 6625 if (queue < priv->plat->tx_queues_to_use) { 6626 netif_tx_napi_add(dev, &ch->tx_napi, 6627 stmmac_napi_poll_tx, 6628 NAPI_POLL_WEIGHT); 6629 } 6630 if (queue < priv->plat->rx_queues_to_use && 6631 queue < priv->plat->tx_queues_to_use) { 6632 netif_napi_add(dev, &ch->rxtx_napi, 6633 stmmac_napi_poll_rxtx, 6634 NAPI_POLL_WEIGHT); 6635 } 6636 } 6637 } 6638 6639 static void stmmac_napi_del(struct net_device *dev) 6640 { 6641 struct stmmac_priv *priv = netdev_priv(dev); 6642 u32 queue, maxq; 6643 6644 maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use); 6645 6646 for (queue = 0; queue < maxq; queue++) { 6647 struct stmmac_channel *ch = &priv->channel[queue]; 6648 6649 if (queue < priv->plat->rx_queues_to_use) 6650 netif_napi_del(&ch->rx_napi); 6651 if (queue < priv->plat->tx_queues_to_use) 6652 netif_napi_del(&ch->tx_napi); 6653 if (queue < priv->plat->rx_queues_to_use && 6654 queue < priv->plat->tx_queues_to_use) { 6655 netif_napi_del(&ch->rxtx_napi); 6656 } 6657 } 6658 } 6659 6660 int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt) 6661 { 6662 struct stmmac_priv *priv = netdev_priv(dev); 6663 int ret = 0; 6664 6665 if (netif_running(dev)) 6666 stmmac_release(dev); 6667 6668 stmmac_napi_del(dev); 6669 6670 priv->plat->rx_queues_to_use = rx_cnt; 6671 priv->plat->tx_queues_to_use = tx_cnt; 6672 6673 stmmac_napi_add(dev); 6674 6675 if (netif_running(dev)) 6676 ret = stmmac_open(dev); 6677 6678 return ret; 6679 } 6680 6681 int stmmac_reinit_ringparam(struct net_device *dev, u32 rx_size, u32 tx_size) 6682 { 6683 struct stmmac_priv *priv = netdev_priv(dev); 6684 int ret = 0; 6685 6686 if (netif_running(dev)) 6687 stmmac_release(dev); 6688 6689 priv->dma_rx_size = rx_size; 6690 priv->dma_tx_size = tx_size; 6691 6692 if (netif_running(dev)) 6693 ret = stmmac_open(dev); 6694 6695 return ret; 6696 } 6697 6698 #define SEND_VERIFY_MPAKCET_FMT "Send Verify mPacket lo_state=%d lp_state=%d\n" 6699 static void stmmac_fpe_lp_task(struct work_struct *work) 6700 { 6701 struct stmmac_priv *priv = container_of(work, struct stmmac_priv, 6702 fpe_task); 6703 struct stmmac_fpe_cfg *fpe_cfg = priv->plat->fpe_cfg; 6704 enum stmmac_fpe_state *lo_state = &fpe_cfg->lo_fpe_state; 6705 enum stmmac_fpe_state *lp_state = &fpe_cfg->lp_fpe_state; 6706 bool *hs_enable = &fpe_cfg->hs_enable; 6707 bool *enable = &fpe_cfg->enable; 6708 int retries = 20; 6709 6710 while (retries-- > 0) { 6711 /* Bail out immediately if FPE handshake is OFF */ 6712 if (*lo_state == FPE_STATE_OFF || !*hs_enable) 6713 break; 6714 6715 if (*lo_state == FPE_STATE_ENTERING_ON && 6716 *lp_state == FPE_STATE_ENTERING_ON) { 6717 stmmac_fpe_configure(priv, priv->ioaddr, 6718 priv->plat->tx_queues_to_use, 6719 priv->plat->rx_queues_to_use, 6720 *enable); 6721 6722 netdev_info(priv->dev, "configured FPE\n"); 6723 6724 *lo_state = FPE_STATE_ON; 6725 *lp_state = FPE_STATE_ON; 6726 netdev_info(priv->dev, "!!! BOTH FPE stations ON\n"); 6727 break; 6728 } 6729 6730 if ((*lo_state == FPE_STATE_CAPABLE || 6731 *lo_state == FPE_STATE_ENTERING_ON) && 6732 *lp_state != FPE_STATE_ON) { 6733 netdev_info(priv->dev, SEND_VERIFY_MPAKCET_FMT, 6734 *lo_state, *lp_state); 6735 stmmac_fpe_send_mpacket(priv, priv->ioaddr, 6736 MPACKET_VERIFY); 6737 } 6738 /* Sleep then retry */ 6739 msleep(500); 6740 } 6741 6742 clear_bit(__FPE_TASK_SCHED, &priv->fpe_task_state); 6743 } 6744 6745 void stmmac_fpe_handshake(struct stmmac_priv *priv, bool enable) 6746 { 6747 if (priv->plat->fpe_cfg->hs_enable != enable) { 6748 if (enable) { 6749 stmmac_fpe_send_mpacket(priv, priv->ioaddr, 6750 MPACKET_VERIFY); 6751 } else { 6752 priv->plat->fpe_cfg->lo_fpe_state = FPE_STATE_OFF; 6753 priv->plat->fpe_cfg->lp_fpe_state = FPE_STATE_OFF; 6754 } 6755 6756 priv->plat->fpe_cfg->hs_enable = enable; 6757 } 6758 } 6759 6760 /** 6761 * stmmac_dvr_probe 6762 * @device: device pointer 6763 * @plat_dat: platform data pointer 6764 * @res: stmmac resource pointer 6765 * Description: this is the main probe function used to 6766 * call the alloc_etherdev, allocate the priv structure. 6767 * Return: 6768 * returns 0 on success, otherwise errno. 6769 */ 6770 int stmmac_dvr_probe(struct device *device, 6771 struct plat_stmmacenet_data *plat_dat, 6772 struct stmmac_resources *res) 6773 { 6774 struct net_device *ndev = NULL; 6775 struct stmmac_priv *priv; 6776 u32 rxq; 6777 int i, ret = 0; 6778 6779 ndev = devm_alloc_etherdev_mqs(device, sizeof(struct stmmac_priv), 6780 MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES); 6781 if (!ndev) 6782 return -ENOMEM; 6783 6784 SET_NETDEV_DEV(ndev, device); 6785 6786 priv = netdev_priv(ndev); 6787 priv->device = device; 6788 priv->dev = ndev; 6789 6790 stmmac_set_ethtool_ops(ndev); 6791 priv->pause = pause; 6792 priv->plat = plat_dat; 6793 priv->ioaddr = res->addr; 6794 priv->dev->base_addr = (unsigned long)res->addr; 6795 priv->plat->dma_cfg->multi_msi_en = priv->plat->multi_msi_en; 6796 6797 priv->dev->irq = res->irq; 6798 priv->wol_irq = res->wol_irq; 6799 priv->lpi_irq = res->lpi_irq; 6800 priv->sfty_ce_irq = res->sfty_ce_irq; 6801 priv->sfty_ue_irq = res->sfty_ue_irq; 6802 for (i = 0; i < MTL_MAX_RX_QUEUES; i++) 6803 priv->rx_irq[i] = res->rx_irq[i]; 6804 for (i = 0; i < MTL_MAX_TX_QUEUES; i++) 6805 priv->tx_irq[i] = res->tx_irq[i]; 6806 6807 if (!is_zero_ether_addr(res->mac)) 6808 memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN); 6809 6810 dev_set_drvdata(device, priv->dev); 6811 6812 /* Verify driver arguments */ 6813 stmmac_verify_args(); 6814 6815 priv->af_xdp_zc_qps = bitmap_zalloc(MTL_MAX_TX_QUEUES, GFP_KERNEL); 6816 if (!priv->af_xdp_zc_qps) 6817 return -ENOMEM; 6818 6819 /* Allocate workqueue */ 6820 priv->wq = create_singlethread_workqueue("stmmac_wq"); 6821 if (!priv->wq) { 6822 dev_err(priv->device, "failed to create workqueue\n"); 6823 return -ENOMEM; 6824 } 6825 6826 INIT_WORK(&priv->service_task, stmmac_service_task); 6827 6828 /* Initialize Link Partner FPE workqueue */ 6829 INIT_WORK(&priv->fpe_task, stmmac_fpe_lp_task); 6830 6831 /* Override with kernel parameters if supplied XXX CRS XXX 6832 * this needs to have multiple instances 6833 */ 6834 if ((phyaddr >= 0) && (phyaddr <= 31)) 6835 priv->plat->phy_addr = phyaddr; 6836 6837 if (priv->plat->stmmac_rst) { 6838 ret = reset_control_assert(priv->plat->stmmac_rst); 6839 reset_control_deassert(priv->plat->stmmac_rst); 6840 /* Some reset controllers have only reset callback instead of 6841 * assert + deassert callbacks pair. 6842 */ 6843 if (ret == -ENOTSUPP) 6844 reset_control_reset(priv->plat->stmmac_rst); 6845 } 6846 6847 ret = reset_control_deassert(priv->plat->stmmac_ahb_rst); 6848 if (ret == -ENOTSUPP) 6849 dev_err(priv->device, "unable to bring out of ahb reset: %pe\n", 6850 ERR_PTR(ret)); 6851 6852 /* Init MAC and get the capabilities */ 6853 ret = stmmac_hw_init(priv); 6854 if (ret) 6855 goto error_hw_init; 6856 6857 /* Only DWMAC core version 5.20 onwards supports HW descriptor prefetch. 6858 */ 6859 if (priv->synopsys_id < DWMAC_CORE_5_20) 6860 priv->plat->dma_cfg->dche = false; 6861 6862 stmmac_check_ether_addr(priv); 6863 6864 ndev->netdev_ops = &stmmac_netdev_ops; 6865 6866 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 6867 NETIF_F_RXCSUM; 6868 6869 ret = stmmac_tc_init(priv, priv); 6870 if (!ret) { 6871 ndev->hw_features |= NETIF_F_HW_TC; 6872 } 6873 6874 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) { 6875 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; 6876 if (priv->plat->has_gmac4) 6877 ndev->hw_features |= NETIF_F_GSO_UDP_L4; 6878 priv->tso = true; 6879 dev_info(priv->device, "TSO feature enabled\n"); 6880 } 6881 6882 if (priv->dma_cap.sphen) { 6883 ndev->hw_features |= NETIF_F_GRO; 6884 priv->sph_cap = true; 6885 priv->sph = priv->sph_cap; 6886 dev_info(priv->device, "SPH feature enabled\n"); 6887 } 6888 6889 /* The current IP register MAC_HW_Feature1[ADDR64] only define 6890 * 32/40/64 bit width, but some SOC support others like i.MX8MP 6891 * support 34 bits but it map to 40 bits width in MAC_HW_Feature1[ADDR64]. 6892 * So overwrite dma_cap.addr64 according to HW real design. 6893 */ 6894 if (priv->plat->addr64) 6895 priv->dma_cap.addr64 = priv->plat->addr64; 6896 6897 if (priv->dma_cap.addr64) { 6898 ret = dma_set_mask_and_coherent(device, 6899 DMA_BIT_MASK(priv->dma_cap.addr64)); 6900 if (!ret) { 6901 dev_info(priv->device, "Using %d bits DMA width\n", 6902 priv->dma_cap.addr64); 6903 6904 /* 6905 * If more than 32 bits can be addressed, make sure to 6906 * enable enhanced addressing mode. 6907 */ 6908 if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) 6909 priv->plat->dma_cfg->eame = true; 6910 } else { 6911 ret = dma_set_mask_and_coherent(device, DMA_BIT_MASK(32)); 6912 if (ret) { 6913 dev_err(priv->device, "Failed to set DMA Mask\n"); 6914 goto error_hw_init; 6915 } 6916 6917 priv->dma_cap.addr64 = 32; 6918 } 6919 } 6920 6921 ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; 6922 ndev->watchdog_timeo = msecs_to_jiffies(watchdog); 6923 #ifdef STMMAC_VLAN_TAG_USED 6924 /* Both mac100 and gmac support receive VLAN tag detection */ 6925 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX; 6926 if (priv->dma_cap.vlhash) { 6927 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 6928 ndev->features |= NETIF_F_HW_VLAN_STAG_FILTER; 6929 } 6930 if (priv->dma_cap.vlins) { 6931 ndev->features |= NETIF_F_HW_VLAN_CTAG_TX; 6932 if (priv->dma_cap.dvlan) 6933 ndev->features |= NETIF_F_HW_VLAN_STAG_TX; 6934 } 6935 #endif 6936 priv->msg_enable = netif_msg_init(debug, default_msg_level); 6937 6938 /* Initialize RSS */ 6939 rxq = priv->plat->rx_queues_to_use; 6940 netdev_rss_key_fill(priv->rss.key, sizeof(priv->rss.key)); 6941 for (i = 0; i < ARRAY_SIZE(priv->rss.table); i++) 6942 priv->rss.table[i] = ethtool_rxfh_indir_default(i, rxq); 6943 6944 if (priv->dma_cap.rssen && priv->plat->rss_en) 6945 ndev->features |= NETIF_F_RXHASH; 6946 6947 /* MTU range: 46 - hw-specific max */ 6948 ndev->min_mtu = ETH_ZLEN - ETH_HLEN; 6949 if (priv->plat->has_xgmac) 6950 ndev->max_mtu = XGMAC_JUMBO_LEN; 6951 else if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00)) 6952 ndev->max_mtu = JUMBO_LEN; 6953 else 6954 ndev->max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN); 6955 /* Will not overwrite ndev->max_mtu if plat->maxmtu > ndev->max_mtu 6956 * as well as plat->maxmtu < ndev->min_mtu which is a invalid range. 6957 */ 6958 if ((priv->plat->maxmtu < ndev->max_mtu) && 6959 (priv->plat->maxmtu >= ndev->min_mtu)) 6960 ndev->max_mtu = priv->plat->maxmtu; 6961 else if (priv->plat->maxmtu < ndev->min_mtu) 6962 dev_warn(priv->device, 6963 "%s: warning: maxmtu having invalid value (%d)\n", 6964 __func__, priv->plat->maxmtu); 6965 6966 if (flow_ctrl) 6967 priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ 6968 6969 /* Setup channels NAPI */ 6970 stmmac_napi_add(ndev); 6971 6972 mutex_init(&priv->lock); 6973 6974 /* If a specific clk_csr value is passed from the platform 6975 * this means that the CSR Clock Range selection cannot be 6976 * changed at run-time and it is fixed. Viceversa the driver'll try to 6977 * set the MDC clock dynamically according to the csr actual 6978 * clock input. 6979 */ 6980 if (priv->plat->clk_csr >= 0) 6981 priv->clk_csr = priv->plat->clk_csr; 6982 else 6983 stmmac_clk_csr_set(priv); 6984 6985 stmmac_check_pcs_mode(priv); 6986 6987 pm_runtime_get_noresume(device); 6988 pm_runtime_set_active(device); 6989 pm_runtime_enable(device); 6990 6991 if (priv->hw->pcs != STMMAC_PCS_TBI && 6992 priv->hw->pcs != STMMAC_PCS_RTBI) { 6993 /* MDIO bus Registration */ 6994 ret = stmmac_mdio_register(ndev); 6995 if (ret < 0) { 6996 dev_err(priv->device, 6997 "%s: MDIO bus (id: %d) registration failed", 6998 __func__, priv->plat->bus_id); 6999 goto error_mdio_register; 7000 } 7001 } 7002 7003 if (priv->plat->speed_mode_2500) 7004 priv->plat->speed_mode_2500(ndev, priv->plat->bsp_priv); 7005 7006 if (priv->plat->mdio_bus_data && priv->plat->mdio_bus_data->has_xpcs) { 7007 ret = stmmac_xpcs_setup(priv->mii); 7008 if (ret) 7009 goto error_xpcs_setup; 7010 } 7011 7012 ret = stmmac_phy_setup(priv); 7013 if (ret) { 7014 netdev_err(ndev, "failed to setup phy (%d)\n", ret); 7015 goto error_phy_setup; 7016 } 7017 7018 ret = register_netdev(ndev); 7019 if (ret) { 7020 dev_err(priv->device, "%s: ERROR %i registering the device\n", 7021 __func__, ret); 7022 goto error_netdev_register; 7023 } 7024 7025 if (priv->plat->serdes_powerup) { 7026 ret = priv->plat->serdes_powerup(ndev, 7027 priv->plat->bsp_priv); 7028 7029 if (ret < 0) 7030 goto error_serdes_powerup; 7031 } 7032 7033 #ifdef CONFIG_DEBUG_FS 7034 stmmac_init_fs(ndev); 7035 #endif 7036 7037 /* Let pm_runtime_put() disable the clocks. 7038 * If CONFIG_PM is not enabled, the clocks will stay powered. 7039 */ 7040 pm_runtime_put(device); 7041 7042 return ret; 7043 7044 error_serdes_powerup: 7045 unregister_netdev(ndev); 7046 error_netdev_register: 7047 phylink_destroy(priv->phylink); 7048 error_xpcs_setup: 7049 error_phy_setup: 7050 if (priv->hw->pcs != STMMAC_PCS_TBI && 7051 priv->hw->pcs != STMMAC_PCS_RTBI) 7052 stmmac_mdio_unregister(ndev); 7053 error_mdio_register: 7054 stmmac_napi_del(ndev); 7055 error_hw_init: 7056 destroy_workqueue(priv->wq); 7057 bitmap_free(priv->af_xdp_zc_qps); 7058 7059 return ret; 7060 } 7061 EXPORT_SYMBOL_GPL(stmmac_dvr_probe); 7062 7063 /** 7064 * stmmac_dvr_remove 7065 * @dev: device pointer 7066 * Description: this function resets the TX/RX processes, disables the MAC RX/TX 7067 * changes the link status, releases the DMA descriptor rings. 7068 */ 7069 int stmmac_dvr_remove(struct device *dev) 7070 { 7071 struct net_device *ndev = dev_get_drvdata(dev); 7072 struct stmmac_priv *priv = netdev_priv(ndev); 7073 7074 netdev_info(priv->dev, "%s: removing driver", __func__); 7075 7076 stmmac_stop_all_dma(priv); 7077 stmmac_mac_set(priv, priv->ioaddr, false); 7078 netif_carrier_off(ndev); 7079 unregister_netdev(ndev); 7080 7081 /* Serdes power down needs to happen after VLAN filter 7082 * is deleted that is triggered by unregister_netdev(). 7083 */ 7084 if (priv->plat->serdes_powerdown) 7085 priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv); 7086 7087 #ifdef CONFIG_DEBUG_FS 7088 stmmac_exit_fs(ndev); 7089 #endif 7090 phylink_destroy(priv->phylink); 7091 if (priv->plat->stmmac_rst) 7092 reset_control_assert(priv->plat->stmmac_rst); 7093 reset_control_assert(priv->plat->stmmac_ahb_rst); 7094 pm_runtime_put(dev); 7095 pm_runtime_disable(dev); 7096 if (priv->hw->pcs != STMMAC_PCS_TBI && 7097 priv->hw->pcs != STMMAC_PCS_RTBI) 7098 stmmac_mdio_unregister(ndev); 7099 destroy_workqueue(priv->wq); 7100 mutex_destroy(&priv->lock); 7101 bitmap_free(priv->af_xdp_zc_qps); 7102 7103 return 0; 7104 } 7105 EXPORT_SYMBOL_GPL(stmmac_dvr_remove); 7106 7107 /** 7108 * stmmac_suspend - suspend callback 7109 * @dev: device pointer 7110 * Description: this is the function to suspend the device and it is called 7111 * by the platform driver to stop the network queue, release the resources, 7112 * program the PMT register (for WoL), clean and release driver resources. 7113 */ 7114 int stmmac_suspend(struct device *dev) 7115 { 7116 struct net_device *ndev = dev_get_drvdata(dev); 7117 struct stmmac_priv *priv = netdev_priv(ndev); 7118 u32 chan; 7119 int ret; 7120 7121 if (!ndev || !netif_running(ndev)) 7122 return 0; 7123 7124 phylink_mac_change(priv->phylink, false); 7125 7126 mutex_lock(&priv->lock); 7127 7128 netif_device_detach(ndev); 7129 7130 stmmac_disable_all_queues(priv); 7131 7132 for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) 7133 hrtimer_cancel(&priv->tx_queue[chan].txtimer); 7134 7135 if (priv->eee_enabled) { 7136 priv->tx_path_in_lpi_mode = false; 7137 del_timer_sync(&priv->eee_ctrl_timer); 7138 } 7139 7140 /* Stop TX/RX DMA */ 7141 stmmac_stop_all_dma(priv); 7142 7143 if (priv->plat->serdes_powerdown) 7144 priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv); 7145 7146 /* Enable Power down mode by programming the PMT regs */ 7147 if (device_may_wakeup(priv->device) && priv->plat->pmt) { 7148 stmmac_pmt(priv, priv->hw, priv->wolopts); 7149 priv->irq_wake = 1; 7150 } else { 7151 mutex_unlock(&priv->lock); 7152 rtnl_lock(); 7153 if (device_may_wakeup(priv->device)) 7154 phylink_speed_down(priv->phylink, false); 7155 phylink_stop(priv->phylink); 7156 rtnl_unlock(); 7157 mutex_lock(&priv->lock); 7158 7159 stmmac_mac_set(priv, priv->ioaddr, false); 7160 pinctrl_pm_select_sleep_state(priv->device); 7161 /* Disable clock in case of PWM is off */ 7162 clk_disable_unprepare(priv->plat->clk_ptp_ref); 7163 ret = pm_runtime_force_suspend(dev); 7164 if (ret) { 7165 mutex_unlock(&priv->lock); 7166 return ret; 7167 } 7168 } 7169 7170 mutex_unlock(&priv->lock); 7171 7172 if (priv->dma_cap.fpesel) { 7173 /* Disable FPE */ 7174 stmmac_fpe_configure(priv, priv->ioaddr, 7175 priv->plat->tx_queues_to_use, 7176 priv->plat->rx_queues_to_use, false); 7177 7178 stmmac_fpe_handshake(priv, false); 7179 } 7180 7181 priv->speed = SPEED_UNKNOWN; 7182 return 0; 7183 } 7184 EXPORT_SYMBOL_GPL(stmmac_suspend); 7185 7186 /** 7187 * stmmac_reset_queues_param - reset queue parameters 7188 * @priv: device pointer 7189 */ 7190 static void stmmac_reset_queues_param(struct stmmac_priv *priv) 7191 { 7192 u32 rx_cnt = priv->plat->rx_queues_to_use; 7193 u32 tx_cnt = priv->plat->tx_queues_to_use; 7194 u32 queue; 7195 7196 for (queue = 0; queue < rx_cnt; queue++) { 7197 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue]; 7198 7199 rx_q->cur_rx = 0; 7200 rx_q->dirty_rx = 0; 7201 } 7202 7203 for (queue = 0; queue < tx_cnt; queue++) { 7204 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; 7205 7206 tx_q->cur_tx = 0; 7207 tx_q->dirty_tx = 0; 7208 tx_q->mss = 0; 7209 7210 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue)); 7211 } 7212 } 7213 7214 /** 7215 * stmmac_resume - resume callback 7216 * @dev: device pointer 7217 * Description: when resume this function is invoked to setup the DMA and CORE 7218 * in a usable state. 7219 */ 7220 int stmmac_resume(struct device *dev) 7221 { 7222 struct net_device *ndev = dev_get_drvdata(dev); 7223 struct stmmac_priv *priv = netdev_priv(ndev); 7224 int ret; 7225 7226 if (!netif_running(ndev)) 7227 return 0; 7228 7229 /* Power Down bit, into the PM register, is cleared 7230 * automatically as soon as a magic packet or a Wake-up frame 7231 * is received. Anyway, it's better to manually clear 7232 * this bit because it can generate problems while resuming 7233 * from another devices (e.g. serial console). 7234 */ 7235 if (device_may_wakeup(priv->device) && priv->plat->pmt) { 7236 mutex_lock(&priv->lock); 7237 stmmac_pmt(priv, priv->hw, 0); 7238 mutex_unlock(&priv->lock); 7239 priv->irq_wake = 0; 7240 } else { 7241 pinctrl_pm_select_default_state(priv->device); 7242 /* enable the clk previously disabled */ 7243 ret = pm_runtime_force_resume(dev); 7244 if (ret) 7245 return ret; 7246 if (priv->plat->clk_ptp_ref) 7247 clk_prepare_enable(priv->plat->clk_ptp_ref); 7248 /* reset the phy so that it's ready */ 7249 if (priv->mii) 7250 stmmac_mdio_reset(priv->mii); 7251 } 7252 7253 if (priv->plat->serdes_powerup) { 7254 ret = priv->plat->serdes_powerup(ndev, 7255 priv->plat->bsp_priv); 7256 7257 if (ret < 0) 7258 return ret; 7259 } 7260 7261 if (!device_may_wakeup(priv->device) || !priv->plat->pmt) { 7262 rtnl_lock(); 7263 phylink_start(priv->phylink); 7264 /* We may have called phylink_speed_down before */ 7265 phylink_speed_up(priv->phylink); 7266 rtnl_unlock(); 7267 } 7268 7269 rtnl_lock(); 7270 mutex_lock(&priv->lock); 7271 7272 stmmac_reset_queues_param(priv); 7273 7274 stmmac_free_tx_skbufs(priv); 7275 stmmac_clear_descriptors(priv); 7276 7277 stmmac_hw_setup(ndev, false); 7278 stmmac_init_coalesce(priv); 7279 stmmac_set_rx_mode(ndev); 7280 7281 stmmac_restore_hw_vlan_rx_fltr(priv, ndev, priv->hw); 7282 7283 stmmac_enable_all_queues(priv); 7284 7285 mutex_unlock(&priv->lock); 7286 rtnl_unlock(); 7287 7288 phylink_mac_change(priv->phylink, true); 7289 7290 netif_device_attach(ndev); 7291 7292 return 0; 7293 } 7294 EXPORT_SYMBOL_GPL(stmmac_resume); 7295 7296 #ifndef MODULE 7297 static int __init stmmac_cmdline_opt(char *str) 7298 { 7299 char *opt; 7300 7301 if (!str || !*str) 7302 return -EINVAL; 7303 while ((opt = strsep(&str, ",")) != NULL) { 7304 if (!strncmp(opt, "debug:", 6)) { 7305 if (kstrtoint(opt + 6, 0, &debug)) 7306 goto err; 7307 } else if (!strncmp(opt, "phyaddr:", 8)) { 7308 if (kstrtoint(opt + 8, 0, &phyaddr)) 7309 goto err; 7310 } else if (!strncmp(opt, "buf_sz:", 7)) { 7311 if (kstrtoint(opt + 7, 0, &buf_sz)) 7312 goto err; 7313 } else if (!strncmp(opt, "tc:", 3)) { 7314 if (kstrtoint(opt + 3, 0, &tc)) 7315 goto err; 7316 } else if (!strncmp(opt, "watchdog:", 9)) { 7317 if (kstrtoint(opt + 9, 0, &watchdog)) 7318 goto err; 7319 } else if (!strncmp(opt, "flow_ctrl:", 10)) { 7320 if (kstrtoint(opt + 10, 0, &flow_ctrl)) 7321 goto err; 7322 } else if (!strncmp(opt, "pause:", 6)) { 7323 if (kstrtoint(opt + 6, 0, &pause)) 7324 goto err; 7325 } else if (!strncmp(opt, "eee_timer:", 10)) { 7326 if (kstrtoint(opt + 10, 0, &eee_timer)) 7327 goto err; 7328 } else if (!strncmp(opt, "chain_mode:", 11)) { 7329 if (kstrtoint(opt + 11, 0, &chain_mode)) 7330 goto err; 7331 } 7332 } 7333 return 0; 7334 7335 err: 7336 pr_err("%s: ERROR broken module parameter conversion", __func__); 7337 return -EINVAL; 7338 } 7339 7340 __setup("stmmaceth=", stmmac_cmdline_opt); 7341 #endif /* MODULE */ 7342 7343 static int __init stmmac_init(void) 7344 { 7345 #ifdef CONFIG_DEBUG_FS 7346 /* Create debugfs main directory if it doesn't exist yet */ 7347 if (!stmmac_fs_dir) 7348 stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL); 7349 register_netdevice_notifier(&stmmac_notifier); 7350 #endif 7351 7352 return 0; 7353 } 7354 7355 static void __exit stmmac_exit(void) 7356 { 7357 #ifdef CONFIG_DEBUG_FS 7358 unregister_netdevice_notifier(&stmmac_notifier); 7359 debugfs_remove_recursive(stmmac_fs_dir); 7360 #endif 7361 } 7362 7363 module_init(stmmac_init) 7364 module_exit(stmmac_exit) 7365 7366 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver"); 7367 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 7368 MODULE_LICENSE("GPL"); 7369