1 /*******************************************************************************
2 This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.
3 ST Ethernet IPs are built around a Synopsys IP Core.
5 Copyright(C) 2007-2011 STMicroelectronics Ltd
7 This program is free software; you can redistribute it and/or modify it
8 under the terms and conditions of the GNU General Public License,
9 version 2, as published by the Free Software Foundation.
11 This program is distributed in the hope it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 The full GNU General Public License is included in this distribution in
17 the file called "COPYING".
19 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
21 Documentation available at:
22 http://www.stlinux.com
24 https://bugzilla.stlinux.com/
25 *******************************************************************************/
27 #include <linux/clk.h>
28 #include <linux/kernel.h>
29 #include <linux/interrupt.h>
31 #include <linux/tcp.h>
32 #include <linux/skbuff.h>
33 #include <linux/ethtool.h>
34 #include <linux/if_ether.h>
35 #include <linux/crc32.h>
36 #include <linux/mii.h>
38 #include <linux/if_vlan.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/slab.h>
41 #include <linux/prefetch.h>
42 #include <linux/pinctrl/consumer.h>
43 #ifdef CONFIG_DEBUG_FS
44 #include <linux/debugfs.h>
45 #include <linux/seq_file.h>
46 #endif /* CONFIG_DEBUG_FS */
47 #include <linux/net_tstamp.h>
48 #include "stmmac_ptp.h"
50 #include <linux/reset.h>
51 #include <linux/of_mdio.h>
52 #include "dwmac1000.h"
54 #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x)
55 #define TSO_MAX_BUFF_SIZE (SZ_16K - 1)
57 /* Module parameters */
59 static int watchdog = TX_TIMEO;
60 module_param(watchdog, int, S_IRUGO | S_IWUSR);
61 MODULE_PARM_DESC(watchdog, "Transmit timeout in milliseconds (default 5s)");
63 static int debug = -1;
64 module_param(debug, int, S_IRUGO | S_IWUSR);
65 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
67 static int phyaddr = -1;
68 module_param(phyaddr, int, S_IRUGO);
69 MODULE_PARM_DESC(phyaddr, "Physical device address");
71 #define STMMAC_TX_THRESH (DMA_TX_SIZE / 4)
72 #define STMMAC_RX_THRESH (DMA_RX_SIZE / 4)
74 static int flow_ctrl = FLOW_OFF;
75 module_param(flow_ctrl, int, S_IRUGO | S_IWUSR);
76 MODULE_PARM_DESC(flow_ctrl, "Flow control ability [on/off]");
78 static int pause = PAUSE_TIME;
79 module_param(pause, int, S_IRUGO | S_IWUSR);
80 MODULE_PARM_DESC(pause, "Flow Control Pause Time");
83 static int tc = TC_DEFAULT;
84 module_param(tc, int, S_IRUGO | S_IWUSR);
85 MODULE_PARM_DESC(tc, "DMA threshold control value");
87 #define DEFAULT_BUFSIZE 1536
88 static int buf_sz = DEFAULT_BUFSIZE;
89 module_param(buf_sz, int, S_IRUGO | S_IWUSR);
90 MODULE_PARM_DESC(buf_sz, "DMA buffer size");
92 #define STMMAC_RX_COPYBREAK 256
94 static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
95 NETIF_MSG_LINK | NETIF_MSG_IFUP |
96 NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
98 #define STMMAC_DEFAULT_LPI_TIMER 1000
99 static int eee_timer = STMMAC_DEFAULT_LPI_TIMER;
100 module_param(eee_timer, int, S_IRUGO | S_IWUSR);
101 MODULE_PARM_DESC(eee_timer, "LPI tx expiration time in msec");
102 #define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x))
104 /* By default the driver will use the ring mode to manage tx and rx descriptors,
105 * but allow user to force to use the chain instead of the ring
107 static unsigned int chain_mode;
108 module_param(chain_mode, int, S_IRUGO);
109 MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
111 static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
113 #ifdef CONFIG_DEBUG_FS
114 static int stmmac_init_fs(struct net_device *dev);
115 static void stmmac_exit_fs(struct net_device *dev);
118 #define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))
121 * stmmac_verify_args - verify the driver parameters.
122 * Description: it checks the driver parameters and set a default in case of
125 static void stmmac_verify_args(void)
127 if (unlikely(watchdog < 0))
129 if (unlikely((buf_sz < DEFAULT_BUFSIZE) || (buf_sz > BUF_SIZE_16KiB)))
130 buf_sz = DEFAULT_BUFSIZE;
131 if (unlikely(flow_ctrl > 1))
132 flow_ctrl = FLOW_AUTO;
133 else if (likely(flow_ctrl < 0))
134 flow_ctrl = FLOW_OFF;
135 if (unlikely((pause < 0) || (pause > 0xffff)))
138 eee_timer = STMMAC_DEFAULT_LPI_TIMER;
142 * stmmac_clk_csr_set - dynamically set the MDC clock
143 * @priv: driver private structure
144 * Description: this is to dynamically set the MDC clock according to the csr
147 * If a specific clk_csr value is passed from the platform
148 * this means that the CSR Clock Range selection cannot be
149 * changed at run-time and it is fixed (as reported in the driver
150 * documentation). Viceversa the driver will try to set the MDC
151 * clock dynamically according to the actual clock input.
153 static void stmmac_clk_csr_set(struct stmmac_priv *priv)
157 clk_rate = clk_get_rate(priv->plat->stmmac_clk);
159 /* Platform provided default clk_csr would be assumed valid
160 * for all other cases except for the below mentioned ones.
161 * For values higher than the IEEE 802.3 specified frequency
162 * we can not estimate the proper divider as it is not known
163 * the frequency of clk_csr_i. So we do not change the default
166 if (!(priv->clk_csr & MAC_CSR_H_FRQ_MASK)) {
167 if (clk_rate < CSR_F_35M)
168 priv->clk_csr = STMMAC_CSR_20_35M;
169 else if ((clk_rate >= CSR_F_35M) && (clk_rate < CSR_F_60M))
170 priv->clk_csr = STMMAC_CSR_35_60M;
171 else if ((clk_rate >= CSR_F_60M) && (clk_rate < CSR_F_100M))
172 priv->clk_csr = STMMAC_CSR_60_100M;
173 else if ((clk_rate >= CSR_F_100M) && (clk_rate < CSR_F_150M))
174 priv->clk_csr = STMMAC_CSR_100_150M;
175 else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M))
176 priv->clk_csr = STMMAC_CSR_150_250M;
177 else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M))
178 priv->clk_csr = STMMAC_CSR_250_300M;
182 static void print_pkt(unsigned char *buf, int len)
184 pr_debug("len = %d byte, buf addr: 0x%p\n", len, buf);
185 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len);
189 * stmmac_tx_avail - Get tx queue availability
190 * @priv: driver private structure
191 * @queue: TX queue index
193 static inline u32 stmmac_tx_avail(struct stmmac_priv *priv, u32 queue)
195 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
198 if (tx_q->dirty_tx > tx_q->cur_tx)
199 avail = tx_q->dirty_tx - tx_q->cur_tx - 1;
201 avail = DMA_TX_SIZE - tx_q->cur_tx + tx_q->dirty_tx - 1;
207 * stmmac_rx_dirty - Get RX queue dirty
208 * @priv: driver private structure
209 * @queue: RX queue index
211 static inline u32 stmmac_rx_dirty(struct stmmac_priv *priv, u32 queue)
213 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
216 if (rx_q->dirty_rx <= rx_q->cur_rx)
217 dirty = rx_q->cur_rx - rx_q->dirty_rx;
219 dirty = DMA_RX_SIZE - rx_q->dirty_rx + rx_q->cur_rx;
225 * stmmac_hw_fix_mac_speed - callback for speed selection
226 * @priv: driver private structure
227 * Description: on some platforms (e.g. ST), some HW system configuration
228 * registers have to be set according to the link speed negotiated.
230 static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv *priv)
232 struct net_device *ndev = priv->dev;
233 struct phy_device *phydev = ndev->phydev;
235 if (likely(priv->plat->fix_mac_speed))
236 priv->plat->fix_mac_speed(priv->plat->bsp_priv, phydev->speed);
240 * stmmac_enable_eee_mode - check and enter in LPI mode
241 * @priv: driver private structure
242 * Description: this function is to verify and enter in LPI mode in case of
245 static void stmmac_enable_eee_mode(struct stmmac_priv *priv)
247 u32 tx_cnt = priv->plat->tx_queues_to_use;
250 /* check if all TX queues have the work finished */
251 for (queue = 0; queue < tx_cnt; queue++) {
252 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
254 if (tx_q->dirty_tx != tx_q->cur_tx)
255 return; /* still unfinished work */
258 /* Check and enter in LPI mode */
259 if (!priv->tx_path_in_lpi_mode)
260 priv->hw->mac->set_eee_mode(priv->hw,
261 priv->plat->en_tx_lpi_clockgating);
265 * stmmac_disable_eee_mode - disable and exit from LPI mode
266 * @priv: driver private structure
267 * Description: this function is to exit and disable EEE in case of
268 * LPI state is true. This is called by the xmit.
270 void stmmac_disable_eee_mode(struct stmmac_priv *priv)
272 priv->hw->mac->reset_eee_mode(priv->hw);
273 del_timer_sync(&priv->eee_ctrl_timer);
274 priv->tx_path_in_lpi_mode = false;
278 * stmmac_eee_ctrl_timer - EEE TX SW timer.
281 * if there is no data transfer and if we are not in LPI state,
282 * then MAC Transmitter can be moved to LPI state.
284 static void stmmac_eee_ctrl_timer(unsigned long arg)
286 struct stmmac_priv *priv = (struct stmmac_priv *)arg;
288 stmmac_enable_eee_mode(priv);
289 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer));
293 * stmmac_eee_init - init EEE
294 * @priv: driver private structure
296 * if the GMAC supports the EEE (from the HW cap reg) and the phy device
297 * can also manage EEE, this function enable the LPI state and start related
300 bool stmmac_eee_init(struct stmmac_priv *priv)
302 struct net_device *ndev = priv->dev;
306 /* Using PCS we cannot dial with the phy registers at this stage
307 * so we do not support extra feature like EEE.
309 if ((priv->hw->pcs == STMMAC_PCS_RGMII) ||
310 (priv->hw->pcs == STMMAC_PCS_TBI) ||
311 (priv->hw->pcs == STMMAC_PCS_RTBI))
314 /* MAC core supports the EEE feature. */
315 if (priv->dma_cap.eee) {
316 int tx_lpi_timer = priv->tx_lpi_timer;
318 /* Check if the PHY supports EEE */
319 if (phy_init_eee(ndev->phydev, 1)) {
320 /* To manage at run-time if the EEE cannot be supported
321 * anymore (for example because the lp caps have been
323 * In that case the driver disable own timers.
325 spin_lock_irqsave(&priv->lock, flags);
326 if (priv->eee_active) {
327 netdev_dbg(priv->dev, "disable EEE\n");
328 del_timer_sync(&priv->eee_ctrl_timer);
329 priv->hw->mac->set_eee_timer(priv->hw, 0,
332 priv->eee_active = 0;
333 spin_unlock_irqrestore(&priv->lock, flags);
336 /* Activate the EEE and start timers */
337 spin_lock_irqsave(&priv->lock, flags);
338 if (!priv->eee_active) {
339 priv->eee_active = 1;
340 setup_timer(&priv->eee_ctrl_timer,
341 stmmac_eee_ctrl_timer,
342 (unsigned long)priv);
343 mod_timer(&priv->eee_ctrl_timer,
344 STMMAC_LPI_T(eee_timer));
346 priv->hw->mac->set_eee_timer(priv->hw,
347 STMMAC_DEFAULT_LIT_LS,
350 /* Set HW EEE according to the speed */
351 priv->hw->mac->set_eee_pls(priv->hw, ndev->phydev->link);
354 spin_unlock_irqrestore(&priv->lock, flags);
356 netdev_dbg(priv->dev, "Energy-Efficient Ethernet initialized\n");
362 /* stmmac_get_tx_hwtstamp - get HW TX timestamps
363 * @priv: driver private structure
364 * @p : descriptor pointer
365 * @skb : the socket buffer
367 * This function will read timestamp from the descriptor & pass it to stack.
368 * and also perform some sanity checks.
370 static void stmmac_get_tx_hwtstamp(struct stmmac_priv *priv,
371 struct dma_desc *p, struct sk_buff *skb)
373 struct skb_shared_hwtstamps shhwtstamp;
376 if (!priv->hwts_tx_en)
379 /* exit if skb doesn't support hw tstamp */
380 if (likely(!skb || !(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)))
383 /* check tx tstamp status */
384 if (!priv->hw->desc->get_tx_timestamp_status(p)) {
385 /* get the valid tstamp */
386 ns = priv->hw->desc->get_timestamp(p, priv->adv_ts);
388 memset(&shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
389 shhwtstamp.hwtstamp = ns_to_ktime(ns);
391 netdev_info(priv->dev, "get valid TX hw timestamp %llu\n", ns);
392 /* pass tstamp to stack */
393 skb_tstamp_tx(skb, &shhwtstamp);
399 /* stmmac_get_rx_hwtstamp - get HW RX timestamps
400 * @priv: driver private structure
401 * @p : descriptor pointer
402 * @np : next descriptor pointer
403 * @skb : the socket buffer
405 * This function will read received packet's timestamp from the descriptor
406 * and pass it to stack. It also perform some sanity checks.
408 static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p,
409 struct dma_desc *np, struct sk_buff *skb)
411 struct skb_shared_hwtstamps *shhwtstamp = NULL;
414 if (!priv->hwts_rx_en)
417 /* Check if timestamp is available */
418 if (!priv->hw->desc->get_rx_timestamp_status(p, priv->adv_ts)) {
419 /* For GMAC4, the valid timestamp is from CTX next desc. */
420 if (priv->plat->has_gmac4)
421 ns = priv->hw->desc->get_timestamp(np, priv->adv_ts);
423 ns = priv->hw->desc->get_timestamp(p, priv->adv_ts);
425 netdev_info(priv->dev, "get valid RX hw timestamp %llu\n", ns);
426 shhwtstamp = skb_hwtstamps(skb);
427 memset(shhwtstamp, 0, sizeof(struct skb_shared_hwtstamps));
428 shhwtstamp->hwtstamp = ns_to_ktime(ns);
430 netdev_err(priv->dev, "cannot get RX hw timestamp\n");
435 * stmmac_hwtstamp_ioctl - control hardware timestamping.
436 * @dev: device pointer.
437 * @ifr: An IOCTL specific structure, that can contain a pointer to
438 * a proprietary structure used to pass information to the driver.
440 * This function configures the MAC to enable/disable both outgoing(TX)
441 * and incoming(RX) packets time stamping based on user input.
443 * 0 on success and an appropriate -ve integer on failure.
445 static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
447 struct stmmac_priv *priv = netdev_priv(dev);
448 struct hwtstamp_config config;
449 struct timespec64 now;
453 u32 ptp_over_ipv4_udp = 0;
454 u32 ptp_over_ipv6_udp = 0;
455 u32 ptp_over_ethernet = 0;
456 u32 snap_type_sel = 0;
457 u32 ts_master_en = 0;
462 if (!(priv->dma_cap.time_stamp || priv->adv_ts)) {
463 netdev_alert(priv->dev, "No support for HW time stamping\n");
464 priv->hwts_tx_en = 0;
465 priv->hwts_rx_en = 0;
470 if (copy_from_user(&config, ifr->ifr_data,
471 sizeof(struct hwtstamp_config)))
474 netdev_dbg(priv->dev, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
475 __func__, config.flags, config.tx_type, config.rx_filter);
477 /* reserved for future extensions */
481 if (config.tx_type != HWTSTAMP_TX_OFF &&
482 config.tx_type != HWTSTAMP_TX_ON)
486 switch (config.rx_filter) {
487 case HWTSTAMP_FILTER_NONE:
488 /* time stamp no incoming packet at all */
489 config.rx_filter = HWTSTAMP_FILTER_NONE;
492 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
493 /* PTP v1, UDP, any kind of event packet */
494 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
495 /* take time stamp for all event messages */
496 snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
498 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
499 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
502 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
503 /* PTP v1, UDP, Sync packet */
504 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
505 /* take time stamp for SYNC messages only */
506 ts_event_en = PTP_TCR_TSEVNTENA;
508 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
509 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
512 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
513 /* PTP v1, UDP, Delay_req packet */
514 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
515 /* take time stamp for Delay_Req messages only */
516 ts_master_en = PTP_TCR_TSMSTRENA;
517 ts_event_en = PTP_TCR_TSEVNTENA;
519 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
520 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
523 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
524 /* PTP v2, UDP, any kind of event packet */
525 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
526 ptp_v2 = PTP_TCR_TSVER2ENA;
527 /* take time stamp for all event messages */
528 snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
530 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
531 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
534 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
535 /* PTP v2, UDP, Sync packet */
536 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_SYNC;
537 ptp_v2 = PTP_TCR_TSVER2ENA;
538 /* take time stamp for SYNC messages only */
539 ts_event_en = PTP_TCR_TSEVNTENA;
541 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
542 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
545 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
546 /* PTP v2, UDP, Delay_req packet */
547 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ;
548 ptp_v2 = PTP_TCR_TSVER2ENA;
549 /* take time stamp for Delay_Req messages only */
550 ts_master_en = PTP_TCR_TSMSTRENA;
551 ts_event_en = PTP_TCR_TSEVNTENA;
553 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
554 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
557 case HWTSTAMP_FILTER_PTP_V2_EVENT:
558 /* PTP v2/802.AS1 any layer, any kind of event packet */
559 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
560 ptp_v2 = PTP_TCR_TSVER2ENA;
561 /* take time stamp for all event messages */
562 snap_type_sel = PTP_TCR_SNAPTYPSEL_1;
564 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
565 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
566 ptp_over_ethernet = PTP_TCR_TSIPENA;
569 case HWTSTAMP_FILTER_PTP_V2_SYNC:
570 /* PTP v2/802.AS1, any layer, Sync packet */
571 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_SYNC;
572 ptp_v2 = PTP_TCR_TSVER2ENA;
573 /* take time stamp for SYNC messages only */
574 ts_event_en = PTP_TCR_TSEVNTENA;
576 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
577 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
578 ptp_over_ethernet = PTP_TCR_TSIPENA;
581 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
582 /* PTP v2/802.AS1, any layer, Delay_req packet */
583 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_DELAY_REQ;
584 ptp_v2 = PTP_TCR_TSVER2ENA;
585 /* take time stamp for Delay_Req messages only */
586 ts_master_en = PTP_TCR_TSMSTRENA;
587 ts_event_en = PTP_TCR_TSEVNTENA;
589 ptp_over_ipv4_udp = PTP_TCR_TSIPV4ENA;
590 ptp_over_ipv6_udp = PTP_TCR_TSIPV6ENA;
591 ptp_over_ethernet = PTP_TCR_TSIPENA;
594 case HWTSTAMP_FILTER_ALL:
595 /* time stamp any incoming packet */
596 config.rx_filter = HWTSTAMP_FILTER_ALL;
597 tstamp_all = PTP_TCR_TSENALL;
604 switch (config.rx_filter) {
605 case HWTSTAMP_FILTER_NONE:
606 config.rx_filter = HWTSTAMP_FILTER_NONE;
609 /* PTP v1, UDP, any kind of event packet */
610 config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
614 priv->hwts_rx_en = ((config.rx_filter == HWTSTAMP_FILTER_NONE) ? 0 : 1);
615 priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON;
617 if (!priv->hwts_tx_en && !priv->hwts_rx_en)
618 priv->hw->ptp->config_hw_tstamping(priv->ptpaddr, 0);
620 value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR |
621 tstamp_all | ptp_v2 | ptp_over_ethernet |
622 ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en |
623 ts_master_en | snap_type_sel);
624 priv->hw->ptp->config_hw_tstamping(priv->ptpaddr, value);
626 /* program Sub Second Increment reg */
627 sec_inc = priv->hw->ptp->config_sub_second_increment(
628 priv->ptpaddr, priv->plat->clk_ptp_rate,
629 priv->plat->has_gmac4);
630 temp = div_u64(1000000000ULL, sec_inc);
632 /* calculate default added value:
634 * addend = (2^32)/freq_div_ratio;
635 * where, freq_div_ratio = 1e9ns/sec_inc
637 temp = (u64)(temp << 32);
638 priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate);
639 priv->hw->ptp->config_addend(priv->ptpaddr,
640 priv->default_addend);
642 /* initialize system time */
643 ktime_get_real_ts64(&now);
645 /* lower 32 bits of tv_sec are safe until y2106 */
646 priv->hw->ptp->init_systime(priv->ptpaddr, (u32)now.tv_sec,
650 return copy_to_user(ifr->ifr_data, &config,
651 sizeof(struct hwtstamp_config)) ? -EFAULT : 0;
655 * stmmac_init_ptp - init PTP
656 * @priv: driver private structure
657 * Description: this is to verify if the HW supports the PTPv1 or PTPv2.
658 * This is done by looking at the HW cap. register.
659 * This function also registers the ptp driver.
661 static int stmmac_init_ptp(struct stmmac_priv *priv)
663 if (!(priv->dma_cap.time_stamp || priv->dma_cap.atime_stamp))
667 /* Check if adv_ts can be enabled for dwmac 4.x core */
668 if (priv->plat->has_gmac4 && priv->dma_cap.atime_stamp)
670 /* Dwmac 3.x core with extend_desc can support adv_ts */
671 else if (priv->extend_desc && priv->dma_cap.atime_stamp)
674 if (priv->dma_cap.time_stamp)
675 netdev_info(priv->dev, "IEEE 1588-2002 Timestamp supported\n");
678 netdev_info(priv->dev,
679 "IEEE 1588-2008 Advanced Timestamp supported\n");
681 priv->hw->ptp = &stmmac_ptp;
682 priv->hwts_tx_en = 0;
683 priv->hwts_rx_en = 0;
685 stmmac_ptp_register(priv);
690 static void stmmac_release_ptp(struct stmmac_priv *priv)
692 if (priv->plat->clk_ptp_ref)
693 clk_disable_unprepare(priv->plat->clk_ptp_ref);
694 stmmac_ptp_unregister(priv);
698 * stmmac_mac_flow_ctrl - Configure flow control in all queues
699 * @priv: driver private structure
700 * Description: It is used for configuring the flow control in all queues
702 static void stmmac_mac_flow_ctrl(struct stmmac_priv *priv, u32 duplex)
704 u32 tx_cnt = priv->plat->tx_queues_to_use;
706 priv->hw->mac->flow_ctrl(priv->hw, duplex, priv->flow_ctrl,
707 priv->pause, tx_cnt);
711 * stmmac_adjust_link - adjusts the link parameters
712 * @dev: net device structure
713 * Description: this is the helper called by the physical abstraction layer
714 * drivers to communicate the phy link status. According the speed and duplex
715 * this driver can invoke registered glue-logic as well.
716 * It also invoke the eee initialization because it could happen when switch
717 * on different networks (that are eee capable).
719 static void stmmac_adjust_link(struct net_device *dev)
721 struct stmmac_priv *priv = netdev_priv(dev);
722 struct phy_device *phydev = dev->phydev;
729 spin_lock_irqsave(&priv->lock, flags);
732 u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
734 /* Now we make sure that we can be in full duplex mode.
735 * If not, we operate in half-duplex mode. */
736 if (phydev->duplex != priv->oldduplex) {
738 if (!(phydev->duplex))
739 ctrl &= ~priv->hw->link.duplex;
741 ctrl |= priv->hw->link.duplex;
742 priv->oldduplex = phydev->duplex;
744 /* Flow Control operation */
746 stmmac_mac_flow_ctrl(priv, phydev->duplex);
748 if (phydev->speed != priv->speed) {
750 switch (phydev->speed) {
752 if (priv->plat->has_gmac ||
753 priv->plat->has_gmac4)
754 ctrl &= ~priv->hw->link.port;
757 if (priv->plat->has_gmac ||
758 priv->plat->has_gmac4) {
759 ctrl |= priv->hw->link.port;
760 ctrl |= priv->hw->link.speed;
762 ctrl &= ~priv->hw->link.port;
766 if (priv->plat->has_gmac ||
767 priv->plat->has_gmac4) {
768 ctrl |= priv->hw->link.port;
769 ctrl &= ~(priv->hw->link.speed);
771 ctrl &= ~priv->hw->link.port;
775 netif_warn(priv, link, priv->dev,
776 "broken speed: %d\n", phydev->speed);
777 phydev->speed = SPEED_UNKNOWN;
780 if (phydev->speed != SPEED_UNKNOWN)
781 stmmac_hw_fix_mac_speed(priv);
782 priv->speed = phydev->speed;
785 writel(ctrl, priv->ioaddr + MAC_CTRL_REG);
787 if (!priv->oldlink) {
791 } else if (priv->oldlink) {
794 priv->speed = SPEED_UNKNOWN;
795 priv->oldduplex = DUPLEX_UNKNOWN;
798 if (new_state && netif_msg_link(priv))
799 phy_print_status(phydev);
801 spin_unlock_irqrestore(&priv->lock, flags);
803 if (phydev->is_pseudo_fixed_link)
804 /* Stop PHY layer to call the hook to adjust the link in case
805 * of a switch is attached to the stmmac driver.
807 phydev->irq = PHY_IGNORE_INTERRUPT;
809 /* At this stage, init the EEE if supported.
810 * Never called in case of fixed_link.
812 priv->eee_enabled = stmmac_eee_init(priv);
816 * stmmac_check_pcs_mode - verify if RGMII/SGMII is supported
817 * @priv: driver private structure
818 * Description: this is to verify if the HW supports the PCS.
819 * Physical Coding Sublayer (PCS) interface that can be used when the MAC is
820 * configured for the TBI, RTBI, or SGMII PHY interface.
822 static void stmmac_check_pcs_mode(struct stmmac_priv *priv)
824 int interface = priv->plat->interface;
826 if (priv->dma_cap.pcs) {
827 if ((interface == PHY_INTERFACE_MODE_RGMII) ||
828 (interface == PHY_INTERFACE_MODE_RGMII_ID) ||
829 (interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
830 (interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
831 netdev_dbg(priv->dev, "PCS RGMII support enabled\n");
832 priv->hw->pcs = STMMAC_PCS_RGMII;
833 } else if (interface == PHY_INTERFACE_MODE_SGMII) {
834 netdev_dbg(priv->dev, "PCS SGMII support enabled\n");
835 priv->hw->pcs = STMMAC_PCS_SGMII;
841 * stmmac_init_phy - PHY initialization
842 * @dev: net device structure
843 * Description: it initializes the driver's PHY state, and attaches the PHY
848 static int stmmac_init_phy(struct net_device *dev)
850 struct stmmac_priv *priv = netdev_priv(dev);
851 struct phy_device *phydev;
852 char phy_id_fmt[MII_BUS_ID_SIZE + 3];
853 char bus_id[MII_BUS_ID_SIZE];
854 int interface = priv->plat->interface;
855 int max_speed = priv->plat->max_speed;
857 priv->speed = SPEED_UNKNOWN;
858 priv->oldduplex = DUPLEX_UNKNOWN;
860 if (priv->plat->phy_node) {
861 phydev = of_phy_connect(dev, priv->plat->phy_node,
862 &stmmac_adjust_link, 0, interface);
864 snprintf(bus_id, MII_BUS_ID_SIZE, "stmmac-%x",
867 snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, bus_id,
868 priv->plat->phy_addr);
869 netdev_dbg(priv->dev, "%s: trying to attach to %s\n", __func__,
872 phydev = phy_connect(dev, phy_id_fmt, &stmmac_adjust_link,
876 if (IS_ERR_OR_NULL(phydev)) {
877 netdev_err(priv->dev, "Could not attach to PHY\n");
881 return PTR_ERR(phydev);
884 /* Stop Advertising 1000BASE Capability if interface is not GMII */
885 if ((interface == PHY_INTERFACE_MODE_MII) ||
886 (interface == PHY_INTERFACE_MODE_RMII) ||
887 (max_speed < 1000 && max_speed > 0))
888 phydev->advertising &= ~(SUPPORTED_1000baseT_Half |
889 SUPPORTED_1000baseT_Full);
892 * Broken HW is sometimes missing the pull-up resistor on the
893 * MDIO line, which results in reads to non-existent devices returning
894 * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
896 * Note: phydev->phy_id is the result of reading the UID PHY registers.
898 if (!priv->plat->phy_node && phydev->phy_id == 0) {
899 phy_disconnect(phydev);
903 /* stmmac_adjust_link will change this to PHY_IGNORE_INTERRUPT to avoid
904 * subsequent PHY polling, make sure we force a link transition if
905 * we have a UP/DOWN/UP transition
907 if (phydev->is_pseudo_fixed_link)
908 phydev->irq = PHY_POLL;
910 phy_attached_info(phydev);
914 static void stmmac_display_rings(struct stmmac_priv *priv)
916 u32 rx_cnt = priv->plat->rx_queues_to_use;
917 u32 tx_cnt = priv->plat->tx_queues_to_use;
918 void *head_rx, *head_tx;
921 /* Display RX rings */
922 for (queue = 0; queue < rx_cnt; queue++) {
923 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
925 pr_info("\tRX Queue %d rings\n", queue);
927 if (priv->extend_desc)
928 head_rx = (void *)rx_q->dma_erx;
930 head_rx = (void *)rx_q->dma_rx;
932 /* Display Rx ring */
933 priv->hw->desc->display_ring(head_rx, DMA_RX_SIZE, true);
936 /* Display TX rings */
937 for (queue = 0; queue < tx_cnt; queue++) {
938 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
940 pr_info("\tTX Queue %d rings\n", queue);
942 if (priv->extend_desc)
943 head_tx = (void *)tx_q->dma_etx;
945 head_tx = (void *)tx_q->dma_tx;
947 /* Display Tx ring */
948 priv->hw->desc->display_ring(head_tx, DMA_TX_SIZE, false);
952 static int stmmac_set_bfsize(int mtu, int bufsize)
956 if (mtu >= BUF_SIZE_4KiB)
958 else if (mtu >= BUF_SIZE_2KiB)
960 else if (mtu > DEFAULT_BUFSIZE)
963 ret = DEFAULT_BUFSIZE;
969 * stmmac_clear_rx_descriptors - clear the descriptors of a RX queue
970 * @priv: driver private structure
971 * @queue: RX queue index
972 * Description: this function is called to clear the RX descriptors
973 * in case of both basic and extended descriptors are used.
975 static void stmmac_clear_rx_descriptors(struct stmmac_priv *priv, u32 queue)
977 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
980 /* Clear the RX descriptors */
981 for (i = 0; i < DMA_RX_SIZE; i++)
982 if (priv->extend_desc)
983 priv->hw->desc->init_rx_desc(&rx_q->dma_erx[i].basic,
984 priv->use_riwt, priv->mode,
985 (i == DMA_RX_SIZE - 1));
987 priv->hw->desc->init_rx_desc(&rx_q->dma_rx[i],
988 priv->use_riwt, priv->mode,
989 (i == DMA_RX_SIZE - 1));
993 * stmmac_clear_tx_descriptors - clear the descriptors of a TX queue
994 * @priv: driver private structure
995 * @queue: TX queue index
996 * Description: this function is called to clear the TX descriptors
997 * in case of both basic and extended descriptors are used.
999 static void stmmac_clear_tx_descriptors(struct stmmac_priv *priv, u32 queue)
1001 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1004 /* Clear the TX descriptors */
1005 for (i = 0; i < DMA_TX_SIZE; i++)
1006 if (priv->extend_desc)
1007 priv->hw->desc->init_tx_desc(&tx_q->dma_etx[i].basic,
1009 (i == DMA_TX_SIZE - 1));
1011 priv->hw->desc->init_tx_desc(&tx_q->dma_tx[i],
1013 (i == DMA_TX_SIZE - 1));
1017 * stmmac_clear_descriptors - clear descriptors
1018 * @priv: driver private structure
1019 * Description: this function is called to clear the tx and rx descriptors
1020 * in case of both basic and extended descriptors are used.
1022 static void stmmac_clear_descriptors(struct stmmac_priv *priv)
1024 u32 rx_queue_cnt = priv->plat->rx_queues_to_use;
1025 u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
1028 for (queue = 0; queue < rx_queue_cnt; queue++)
1029 stmmac_clear_rx_descriptors(priv, queue);
1031 for (queue = 0; queue < tx_queue_cnt; queue++)
1032 stmmac_clear_tx_descriptors(priv, queue);
1036 * stmmac_init_rx_buffers - init the RX descriptor buffer.
1037 * @priv: driver private structure
1038 * @p: descriptor pointer
1039 * @i: descriptor index
1041 * @queue: RX queue index
1042 * Description: this function is called to allocate a receive buffer, perform
1043 * the DMA mapping and init the descriptor.
1045 static int stmmac_init_rx_buffers(struct stmmac_priv *priv, struct dma_desc *p,
1046 int i, gfp_t flags, u32 queue)
1048 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
1049 struct sk_buff *skb;
1051 skb = __netdev_alloc_skb_ip_align(priv->dev, priv->dma_buf_sz, flags);
1053 netdev_err(priv->dev,
1054 "%s: Rx init fails; skb is NULL\n", __func__);
1057 rx_q->rx_skbuff[i] = skb;
1058 rx_q->rx_skbuff_dma[i] = dma_map_single(priv->device, skb->data,
1061 if (dma_mapping_error(priv->device, rx_q->rx_skbuff_dma[i])) {
1062 netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
1063 dev_kfree_skb_any(skb);
1067 if (priv->synopsys_id >= DWMAC_CORE_4_00)
1068 p->des0 = cpu_to_le32(rx_q->rx_skbuff_dma[i]);
1070 p->des2 = cpu_to_le32(rx_q->rx_skbuff_dma[i]);
1072 if ((priv->hw->mode->init_desc3) &&
1073 (priv->dma_buf_sz == BUF_SIZE_16KiB))
1074 priv->hw->mode->init_desc3(p);
1080 * stmmac_free_rx_buffers - free RX buffers.
1081 * @priv: driver private structure
1082 * @queue: RX queue index
1085 static void stmmac_free_rx_buffers(struct stmmac_priv *priv, u32 queue, int i)
1087 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
1089 if (rx_q->rx_skbuff[i]) {
1090 dma_unmap_single(priv->device, rx_q->rx_skbuff_dma[i],
1091 priv->dma_buf_sz, DMA_FROM_DEVICE);
1092 dev_kfree_skb_any(rx_q->rx_skbuff[i]);
1094 rx_q->rx_skbuff[i] = NULL;
1098 * stmmac_free_tx_buffers - free RX buffers.
1099 * @priv: driver private structure
1100 * @queue: RX queue index
1103 static void stmmac_free_tx_buffers(struct stmmac_priv *priv, u32 queue, u32 i)
1105 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1107 if (tx_q->tx_skbuff_dma[i].buf) {
1108 if (tx_q->tx_skbuff_dma[i].map_as_page)
1109 dma_unmap_page(priv->device,
1110 tx_q->tx_skbuff_dma[i].buf,
1111 tx_q->tx_skbuff_dma[i].len,
1114 dma_unmap_single(priv->device,
1115 tx_q->tx_skbuff_dma[i].buf,
1116 tx_q->tx_skbuff_dma[i].len,
1120 if (tx_q->tx_skbuff[i]) {
1121 dev_kfree_skb_any(tx_q->tx_skbuff[i]);
1122 tx_q->tx_skbuff[i] = NULL;
1123 tx_q->tx_skbuff_dma[i].buf = 0;
1124 tx_q->tx_skbuff_dma[i].map_as_page = false;
1129 * init_tx_dma_desc_rings - init the TX descriptor rings
1130 * @dev: net device structure
1131 * Description: this function initializes the DMA TX descriptors
1132 * and allocates the socket buffers. It suppors the chained and ring
1135 static int init_tx_dma_desc_rings(struct net_device *dev)
1137 struct stmmac_priv *priv = netdev_priv(dev);
1138 u32 tx_queue_cnt = priv->plat->tx_queues_to_use;
1142 for (queue = 0; queue < tx_queue_cnt; queue++) {
1143 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1145 netif_dbg(priv, probe, priv->dev,
1146 "(%s) dma_tx_phy=0x%08x\n", __func__,
1147 (u32)tx_q->dma_tx_phy);
1149 /* Setup the chained descriptor addresses */
1150 if (priv->mode == STMMAC_CHAIN_MODE) {
1151 if (priv->extend_desc)
1152 priv->hw->mode->init(tx_q->dma_etx,
1156 priv->hw->mode->init(tx_q->dma_tx,
1161 for (i = 0; i < DMA_TX_SIZE; i++) {
1164 if (priv->extend_desc)
1165 p = &((tx_q->dma_etx + i)->basic);
1167 p = tx_q->dma_tx + i;
1169 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
1178 tx_q->tx_skbuff_dma[i].buf = 0;
1179 tx_q->tx_skbuff_dma[i].map_as_page = false;
1180 tx_q->tx_skbuff_dma[i].len = 0;
1181 tx_q->tx_skbuff_dma[i].last_segment = false;
1182 tx_q->tx_skbuff[i] = NULL;
1187 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue));
1194 * init_rx_dma_desc_rings - init the RX descriptor rings
1195 * @dev: net device structure
1197 * Description: this function initializes the DMA RX descriptors
1198 * and allocates the socket buffers. It suppors the chained and ring
1201 static int init_rx_dma_desc_rings(struct net_device *dev, gfp_t flags)
1203 struct stmmac_priv *priv = netdev_priv(dev);
1204 u32 rx_count = priv->plat->rx_queues_to_use;
1205 unsigned int bfsize = 0;
1210 if (priv->hw->mode->set_16kib_bfsize)
1211 bfsize = priv->hw->mode->set_16kib_bfsize(dev->mtu);
1213 if (bfsize < BUF_SIZE_16KiB)
1214 bfsize = stmmac_set_bfsize(dev->mtu, priv->dma_buf_sz);
1216 priv->dma_buf_sz = bfsize;
1218 /* RX INITIALIZATION */
1219 netif_dbg(priv, probe, priv->dev,
1220 "SKB addresses:\nskb\t\tskb data\tdma data\n");
1222 for (queue = 0; queue < rx_count; queue++) {
1223 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
1225 netif_dbg(priv, probe, priv->dev,
1226 "(%s) dma_rx_phy=0x%08x\n", __func__,
1227 (u32)rx_q->dma_rx_phy);
1229 for (i = 0; i < DMA_RX_SIZE; i++) {
1232 if (priv->extend_desc)
1233 p = &((rx_q->dma_erx + i)->basic);
1235 p = rx_q->dma_rx + i;
1237 ret = stmmac_init_rx_buffers(priv, p, i, flags, queue);
1239 goto err_init_rx_buffers;
1241 netif_dbg(priv, probe, priv->dev, "[%p]\t[%p]\t[%x]\n",
1243 rx_q->rx_skbuff[i]->data,
1244 (unsigned int)rx_q->rx_skbuff_dma[i]);
1248 rx_q->dirty_rx = (unsigned int)(i - DMA_RX_SIZE);
1250 stmmac_clear_rx_descriptors(priv, queue);
1252 if (priv->mode == STMMAC_CHAIN_MODE) {
1253 if (priv->extend_desc)
1254 priv->hw->mode->init(rx_q->dma_erx,
1258 priv->hw->mode->init(rx_q->dma_rx,
1268 err_init_rx_buffers:
1269 while (queue-- >= 0) {
1271 stmmac_free_rx_buffers(priv, queue, i);
1280 * init_dma_desc_rings - init the RX/TX descriptor rings
1281 * @dev: net device structure
1283 * Description: this function initializes the DMA RX/TX descriptors
1284 * and allocates the socket buffers. It suppors the chained and ring
1287 static int init_dma_desc_rings(struct net_device *dev, gfp_t flags)
1289 struct stmmac_priv *priv = netdev_priv(dev);
1290 int ret = init_rx_dma_desc_rings(dev, flags);
1295 ret = init_tx_dma_desc_rings(dev);
1297 if (netif_msg_hw(priv))
1298 stmmac_display_rings(priv);
1303 static void dma_free_rx_skbufs(struct stmmac_priv *priv, u32 queue)
1307 for (i = 0; i < DMA_RX_SIZE; i++)
1308 stmmac_free_rx_buffers(priv, queue, i);
1311 static void dma_free_tx_skbufs(struct stmmac_priv *priv, u32 queue)
1315 for (i = 0; i < DMA_TX_SIZE; i++)
1316 stmmac_free_tx_buffers(priv, queue, i);
1320 * free_rx_dma_desc_resources - free RX DMA resources
1321 * @priv: driver private structure
1323 static void free_rx_dma_desc_resources(struct stmmac_priv *priv)
1325 u32 rx_count = priv->plat->rx_queues_to_use;
1328 if (!priv->rx_queue)
1331 /* Free RX queue resources */
1332 for (queue = 0; queue < rx_count; queue++) {
1333 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
1338 /* Release the DMA RX socket buffers */
1339 dma_free_rx_skbufs(priv, queue);
1341 kfree(rx_q->rx_skbuff);
1343 kfree(rx_q->rx_skbuff_dma);
1345 if (!priv->extend_desc)
1346 dma_free_coherent(priv->device,
1347 DMA_RX_SIZE * sizeof(struct dma_desc),
1351 dma_free_coherent(priv->device, DMA_RX_SIZE *
1352 sizeof(struct dma_extended_desc),
1357 kfree(priv->rx_queue);
1361 * free_tx_dma_desc_resources - free TX DMA resources
1362 * @priv: driver private structure
1364 static void free_tx_dma_desc_resources(struct stmmac_priv *priv)
1366 u32 tx_count = priv->plat->tx_queues_to_use;
1369 if (!priv->tx_queue)
1372 /* Free TX queue resources */
1373 for (queue = 0; queue < tx_count; queue++) {
1374 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1379 /* Release the DMA TX socket buffers */
1380 dma_free_tx_skbufs(priv, queue);
1382 kfree(tx_q->tx_skbuff);
1384 kfree(tx_q->tx_skbuff_dma);
1386 if (!priv->extend_desc)
1387 dma_free_coherent(priv->device,
1388 DMA_TX_SIZE * sizeof(struct dma_desc),
1392 dma_free_coherent(priv->device, DMA_TX_SIZE *
1393 sizeof(struct dma_extended_desc),
1398 kfree(priv->tx_queue);
1402 * free_dma_desc_resources - free All DMA resources
1403 * @priv: driver private structure
1405 static void free_dma_desc_resources(struct stmmac_priv *priv)
1407 free_rx_dma_desc_resources(priv);
1408 free_tx_dma_desc_resources(priv);
1412 * alloc_rx_dma_desc_resources - alloc RX resources.
1413 * @priv: private structure
1414 * Description: according to which descriptor can be used (extend or basic)
1415 * this function allocates the resources for RX paths. It pre-allocates the
1416 * RX socket buffer in order to allow zero-copy mechanism.
1418 static int alloc_rx_dma_desc_resources(struct stmmac_priv *priv)
1420 u32 rx_count = priv->plat->rx_queues_to_use;
1424 /* Allocate RX queues array */
1425 priv->rx_queue = kmalloc_array(rx_count,
1426 sizeof(struct stmmac_rx_queue),
1428 if (!priv->rx_queue) {
1429 kfree(priv->rx_queue);
1433 /* RX queues buffers and DMA */
1434 for (queue = 0; queue < rx_count; queue++) {
1435 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
1437 rx_q->queue_index = queue;
1438 rx_q->priv_data = priv;
1440 rx_q->rx_skbuff_dma = kmalloc_array(DMA_RX_SIZE,
1443 if (!rx_q->rx_skbuff_dma)
1444 goto err_dma_buffers;
1446 rx_q->rx_skbuff = kmalloc_array(DMA_RX_SIZE,
1447 sizeof(struct sk_buff *),
1449 if (!rx_q->rx_skbuff)
1450 goto err_dma_buffers;
1452 if (priv->extend_desc) {
1453 rx_q->dma_erx = dma_zalloc_coherent(priv->device,
1454 (DMA_RX_SIZE * sizeof(struct dma_extended_desc)),
1455 &rx_q->dma_rx_phy, GFP_KERNEL);
1458 goto err_dma_buffers;
1460 rx_q->dma_rx = dma_zalloc_coherent(priv->device,
1461 (DMA_RX_SIZE * sizeof(struct dma_desc)),
1462 &rx_q->dma_rx_phy, GFP_KERNEL);
1465 goto err_dma_buffers;
1472 free_rx_dma_desc_resources(priv);
1478 * alloc_tx_dma_desc_resources - alloc TX resources.
1479 * @priv: private structure
1480 * Description: according to which descriptor can be used (extend or basic)
1481 * this function allocates the resources for TX paths.
1483 static int alloc_tx_dma_desc_resources(struct stmmac_priv *priv)
1485 u32 tx_count = priv->plat->tx_queues_to_use;
1489 /* Allocate TX queues array */
1490 priv->tx_queue = kmalloc_array(tx_count,
1491 sizeof(struct stmmac_tx_queue),
1493 if (!priv->tx_queue)
1496 /* TX queues buffers and DMA */
1497 for (queue = 0; queue < tx_count; queue++) {
1498 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1500 tx_q->queue_index = queue;
1501 tx_q->priv_data = priv;
1503 tx_q->tx_skbuff_dma = kmalloc_array(DMA_TX_SIZE,
1504 sizeof(struct stmmac_tx_info),
1507 if (!tx_q->tx_skbuff_dma)
1508 goto err_dma_buffers;
1510 tx_q->tx_skbuff = kmalloc_array(DMA_TX_SIZE,
1511 sizeof(struct sk_buff *),
1513 if (!tx_q->tx_skbuff)
1514 goto err_dma_buffers;
1516 if (priv->extend_desc) {
1518 dma_zalloc_coherent(priv->device,
1519 (DMA_TX_SIZE * sizeof(struct dma_extended_desc)),
1520 &tx_q->dma_tx_phy, GFP_KERNEL);
1523 goto err_dma_buffers;
1526 dma_zalloc_coherent(priv->device,
1527 (DMA_TX_SIZE * sizeof(struct dma_desc)),
1528 &tx_q->dma_tx_phy, GFP_KERNEL);
1531 goto err_dma_buffers;
1538 free_tx_dma_desc_resources(priv);
1544 * alloc_dma_desc_resources - alloc TX/RX resources.
1545 * @priv: private structure
1546 * Description: according to which descriptor can be used (extend or basic)
1547 * this function allocates the resources for TX and RX paths. In case of
1548 * reception, for example, it pre-allocated the RX socket buffer in order to
1549 * allow zero-copy mechanism.
1551 static int alloc_dma_desc_resources(struct stmmac_priv *priv)
1555 ret = alloc_tx_dma_desc_resources(priv);
1559 ret = alloc_rx_dma_desc_resources(priv);
1565 * stmmac_mac_enable_rx_queues - Enable MAC rx queues
1566 * @priv: driver private structure
1567 * Description: It is used for enabling the rx queues in the MAC
1569 static void stmmac_mac_enable_rx_queues(struct stmmac_priv *priv)
1571 u32 rx_queues_count = priv->plat->rx_queues_to_use;
1575 for (queue = 0; queue < rx_queues_count; queue++) {
1576 mode = priv->plat->rx_queues_cfg[queue].mode_to_use;
1577 priv->hw->mac->rx_queue_enable(priv->hw, mode, queue);
1582 * stmmac_start_rx_dma - start RX DMA channel
1583 * @priv: driver private structure
1584 * @chan: RX channel index
1586 * This starts a RX DMA channel
1588 static void stmmac_start_rx_dma(struct stmmac_priv *priv, u32 chan)
1590 netdev_dbg(priv->dev, "DMA RX processes started in channel %d\n", chan);
1591 priv->hw->dma->start_rx(priv->ioaddr, chan);
1595 * stmmac_start_tx_dma - start TX DMA channel
1596 * @priv: driver private structure
1597 * @chan: TX channel index
1599 * This starts a TX DMA channel
1601 static void stmmac_start_tx_dma(struct stmmac_priv *priv, u32 chan)
1603 netdev_dbg(priv->dev, "DMA TX processes started in channel %d\n", chan);
1604 priv->hw->dma->start_tx(priv->ioaddr, chan);
1608 * stmmac_stop_rx_dma - stop RX DMA channel
1609 * @priv: driver private structure
1610 * @chan: RX channel index
1612 * This stops a RX DMA channel
1614 static void stmmac_stop_rx_dma(struct stmmac_priv *priv, u32 chan)
1616 netdev_dbg(priv->dev, "DMA RX processes stopped in channel %d\n", chan);
1617 priv->hw->dma->stop_rx(priv->ioaddr, chan);
1621 * stmmac_stop_tx_dma - stop TX DMA channel
1622 * @priv: driver private structure
1623 * @chan: TX channel index
1625 * This stops a TX DMA channel
1627 static void stmmac_stop_tx_dma(struct stmmac_priv *priv, u32 chan)
1629 netdev_dbg(priv->dev, "DMA TX processes stopped in channel %d\n", chan);
1630 priv->hw->dma->stop_tx(priv->ioaddr, chan);
1634 * stmmac_start_all_dma - start all RX and TX DMA channels
1635 * @priv: driver private structure
1637 * This starts all the RX and TX DMA channels
1639 static void stmmac_start_all_dma(struct stmmac_priv *priv)
1641 u32 rx_channels_count = priv->plat->rx_queues_to_use;
1642 u32 tx_channels_count = priv->plat->tx_queues_to_use;
1645 for (chan = 0; chan < rx_channels_count; chan++)
1646 stmmac_start_rx_dma(priv, chan);
1648 for (chan = 0; chan < tx_channels_count; chan++)
1649 stmmac_start_tx_dma(priv, chan);
1653 * stmmac_stop_all_dma - stop all RX and TX DMA channels
1654 * @priv: driver private structure
1656 * This stops the RX and TX DMA channels
1658 static void stmmac_stop_all_dma(struct stmmac_priv *priv)
1660 u32 rx_channels_count = priv->plat->rx_queues_to_use;
1661 u32 tx_channels_count = priv->plat->tx_queues_to_use;
1664 for (chan = 0; chan < rx_channels_count; chan++)
1665 stmmac_stop_rx_dma(priv, chan);
1667 for (chan = 0; chan < tx_channels_count; chan++)
1668 stmmac_stop_tx_dma(priv, chan);
1672 * stmmac_dma_operation_mode - HW DMA operation mode
1673 * @priv: driver private structure
1674 * Description: it is used for configuring the DMA operation mode register in
1675 * order to program the tx/rx DMA thresholds or Store-And-Forward mode.
1677 static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
1679 u32 rx_channels_count = priv->plat->rx_queues_to_use;
1680 u32 tx_channels_count = priv->plat->tx_queues_to_use;
1681 int rxfifosz = priv->plat->rx_fifo_size;
1687 rxfifosz = priv->dma_cap.rx_fifo_size;
1689 if (priv->plat->force_thresh_dma_mode) {
1692 } else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) {
1694 * In case of GMAC, SF mode can be enabled
1695 * to perform the TX COE in HW. This depends on:
1696 * 1) TX COE if actually supported
1697 * 2) There is no bugged Jumbo frame support
1698 * that needs to not insert csum in the TDES.
1700 txmode = SF_DMA_MODE;
1701 rxmode = SF_DMA_MODE;
1702 priv->xstats.threshold = SF_DMA_MODE;
1705 rxmode = SF_DMA_MODE;
1708 /* configure all channels */
1709 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
1710 for (chan = 0; chan < rx_channels_count; chan++)
1711 priv->hw->dma->dma_rx_mode(priv->ioaddr, rxmode, chan,
1714 for (chan = 0; chan < tx_channels_count; chan++)
1715 priv->hw->dma->dma_tx_mode(priv->ioaddr, txmode, chan);
1717 priv->hw->dma->dma_mode(priv->ioaddr, txmode, rxmode,
1723 * stmmac_tx_clean - to manage the transmission completion
1724 * @priv: driver private structure
1725 * @queue: TX queue index
1726 * Description: it reclaims the transmit resources after transmission completes.
1728 static void stmmac_tx_clean(struct stmmac_priv *priv, u32 queue)
1730 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1731 unsigned int bytes_compl = 0, pkts_compl = 0;
1732 unsigned int entry = tx_q->dirty_tx;
1734 netif_tx_lock(priv->dev);
1736 priv->xstats.tx_clean++;
1738 while (entry != tx_q->cur_tx) {
1739 struct sk_buff *skb = tx_q->tx_skbuff[entry];
1743 if (priv->extend_desc)
1744 p = (struct dma_desc *)(tx_q->dma_etx + entry);
1746 p = tx_q->dma_tx + entry;
1748 status = priv->hw->desc->tx_status(&priv->dev->stats,
1751 /* Check if the descriptor is owned by the DMA */
1752 if (unlikely(status & tx_dma_own))
1755 /* Just consider the last segment and ...*/
1756 if (likely(!(status & tx_not_ls))) {
1757 /* ... verify the status error condition */
1758 if (unlikely(status & tx_err)) {
1759 priv->dev->stats.tx_errors++;
1761 priv->dev->stats.tx_packets++;
1762 priv->xstats.tx_pkt_n++;
1764 stmmac_get_tx_hwtstamp(priv, p, skb);
1767 if (likely(tx_q->tx_skbuff_dma[entry].buf)) {
1768 if (tx_q->tx_skbuff_dma[entry].map_as_page)
1769 dma_unmap_page(priv->device,
1770 tx_q->tx_skbuff_dma[entry].buf,
1771 tx_q->tx_skbuff_dma[entry].len,
1774 dma_unmap_single(priv->device,
1775 tx_q->tx_skbuff_dma[entry].buf,
1776 tx_q->tx_skbuff_dma[entry].len,
1778 tx_q->tx_skbuff_dma[entry].buf = 0;
1779 tx_q->tx_skbuff_dma[entry].len = 0;
1780 tx_q->tx_skbuff_dma[entry].map_as_page = false;
1783 if (priv->hw->mode->clean_desc3)
1784 priv->hw->mode->clean_desc3(tx_q, p);
1786 tx_q->tx_skbuff_dma[entry].last_segment = false;
1787 tx_q->tx_skbuff_dma[entry].is_jumbo = false;
1789 if (likely(skb != NULL)) {
1791 bytes_compl += skb->len;
1792 dev_consume_skb_any(skb);
1793 tx_q->tx_skbuff[entry] = NULL;
1796 priv->hw->desc->release_tx_desc(p, priv->mode);
1798 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
1800 tx_q->dirty_tx = entry;
1802 netdev_tx_completed_queue(netdev_get_tx_queue(priv->dev, queue),
1803 pkts_compl, bytes_compl);
1805 if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv->dev,
1807 stmmac_tx_avail(priv, queue) > STMMAC_TX_THRESH) {
1808 netif_dbg(priv, tx_done, priv->dev,
1809 "%s: restart transmit\n", __func__);
1810 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
1813 if ((priv->eee_enabled) && (!priv->tx_path_in_lpi_mode)) {
1814 stmmac_enable_eee_mode(priv);
1815 mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(eee_timer));
1817 netif_tx_unlock(priv->dev);
1820 static inline void stmmac_enable_dma_irq(struct stmmac_priv *priv, u32 chan)
1822 priv->hw->dma->enable_dma_irq(priv->ioaddr, chan);
1825 static inline void stmmac_disable_dma_irq(struct stmmac_priv *priv, u32 chan)
1827 priv->hw->dma->disable_dma_irq(priv->ioaddr, chan);
1831 * stmmac_tx_err - to manage the tx error
1832 * @priv: driver private structure
1833 * @queue: queue index
1834 * Description: it cleans the descriptors and restarts the transmission
1835 * in case of transmission errors.
1837 static void stmmac_tx_err(struct stmmac_priv *priv, u32 queue)
1839 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
1843 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue));
1845 stmmac_stop_tx_dma(priv, chan);
1846 dma_free_tx_skbufs(priv, queue);
1847 for (i = 0; i < DMA_TX_SIZE; i++)
1848 if (priv->extend_desc)
1849 priv->hw->desc->init_tx_desc(&tx_q->dma_etx[i].basic,
1851 (i == DMA_TX_SIZE - 1));
1853 priv->hw->desc->init_tx_desc(&tx_q->dma_tx[i],
1855 (i == DMA_TX_SIZE - 1));
1858 netdev_tx_reset_queue(netdev_get_tx_queue(priv->dev, queue));
1859 stmmac_start_tx_dma(priv, chan);
1861 priv->dev->stats.tx_errors++;
1862 netif_tx_wake_queue(netdev_get_tx_queue(priv->dev, queue));
1866 * stmmac_set_dma_operation_mode - Set DMA operation mode by channel
1867 * @priv: driver private structure
1868 * @txmode: TX operating mode
1869 * @rxmode: RX operating mode
1870 * @chan: channel index
1871 * Description: it is used for configuring of the DMA operation mode in
1872 * runtime in order to program the tx/rx DMA thresholds or Store-And-Forward
1875 static void stmmac_set_dma_operation_mode(struct stmmac_priv *priv, u32 txmode,
1876 u32 rxmode, u32 chan)
1878 int rxfifosz = priv->plat->rx_fifo_size;
1881 rxfifosz = priv->dma_cap.rx_fifo_size;
1883 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
1884 priv->hw->dma->dma_rx_mode(priv->ioaddr, rxmode, chan,
1886 priv->hw->dma->dma_tx_mode(priv->ioaddr, txmode, chan);
1888 priv->hw->dma->dma_mode(priv->ioaddr, txmode, rxmode,
1894 * stmmac_dma_interrupt - DMA ISR
1895 * @priv: driver private structure
1896 * Description: this is the DMA ISR. It is called by the main ISR.
1897 * It calls the dwmac dma routine and schedule poll method in case of some
1900 static void stmmac_dma_interrupt(struct stmmac_priv *priv)
1902 u32 tx_channel_count = priv->plat->tx_queues_to_use;
1906 for (chan = 0; chan < tx_channel_count; chan++) {
1907 struct stmmac_rx_queue *rx_q = &priv->rx_queue[chan];
1909 status = priv->hw->dma->dma_interrupt(priv->ioaddr,
1910 &priv->xstats, chan);
1911 if (likely((status & handle_rx)) || (status & handle_tx)) {
1912 if (likely(napi_schedule_prep(&rx_q->napi))) {
1913 stmmac_disable_dma_irq(priv, chan);
1914 __napi_schedule(&rx_q->napi);
1918 if (unlikely(status & tx_hard_error_bump_tc)) {
1919 /* Try to bump up the dma threshold on this failure */
1920 if (unlikely(priv->xstats.threshold != SF_DMA_MODE) &&
1923 if (priv->plat->force_thresh_dma_mode)
1924 stmmac_set_dma_operation_mode(priv,
1929 stmmac_set_dma_operation_mode(priv,
1933 priv->xstats.threshold = tc;
1935 } else if (unlikely(status == tx_hard_error)) {
1936 stmmac_tx_err(priv, chan);
1942 * stmmac_mmc_setup: setup the Mac Management Counters (MMC)
1943 * @priv: driver private structure
1944 * Description: this masks the MMC irq, in fact, the counters are managed in SW.
1946 static void stmmac_mmc_setup(struct stmmac_priv *priv)
1948 unsigned int mode = MMC_CNTRL_RESET_ON_READ | MMC_CNTRL_COUNTER_RESET |
1949 MMC_CNTRL_PRESET | MMC_CNTRL_FULL_HALF_PRESET;
1951 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
1952 priv->ptpaddr = priv->ioaddr + PTP_GMAC4_OFFSET;
1953 priv->mmcaddr = priv->ioaddr + MMC_GMAC4_OFFSET;
1955 priv->ptpaddr = priv->ioaddr + PTP_GMAC3_X_OFFSET;
1956 priv->mmcaddr = priv->ioaddr + MMC_GMAC3_X_OFFSET;
1959 dwmac_mmc_intr_all_mask(priv->mmcaddr);
1961 if (priv->dma_cap.rmon) {
1962 dwmac_mmc_ctrl(priv->mmcaddr, mode);
1963 memset(&priv->mmc, 0, sizeof(struct stmmac_counters));
1965 netdev_info(priv->dev, "No MAC Management Counters available\n");
1969 * stmmac_selec_desc_mode - to select among: normal/alternate/extend descriptors
1970 * @priv: driver private structure
1971 * Description: select the Enhanced/Alternate or Normal descriptors.
1972 * In case of Enhanced/Alternate, it checks if the extended descriptors are
1973 * supported by the HW capability register.
1975 static void stmmac_selec_desc_mode(struct stmmac_priv *priv)
1977 if (priv->plat->enh_desc) {
1978 dev_info(priv->device, "Enhanced/Alternate descriptors\n");
1980 /* GMAC older than 3.50 has no extended descriptors */
1981 if (priv->synopsys_id >= DWMAC_CORE_3_50) {
1982 dev_info(priv->device, "Enabled extended descriptors\n");
1983 priv->extend_desc = 1;
1985 dev_warn(priv->device, "Extended descriptors not supported\n");
1987 priv->hw->desc = &enh_desc_ops;
1989 dev_info(priv->device, "Normal descriptors\n");
1990 priv->hw->desc = &ndesc_ops;
1995 * stmmac_get_hw_features - get MAC capabilities from the HW cap. register.
1996 * @priv: driver private structure
1998 * new GMAC chip generations have a new register to indicate the
1999 * presence of the optional feature/functions.
2000 * This can be also used to override the value passed through the
2001 * platform and necessary for old MAC10/100 and GMAC chips.
2003 static int stmmac_get_hw_features(struct stmmac_priv *priv)
2007 if (priv->hw->dma->get_hw_feature) {
2008 priv->hw->dma->get_hw_feature(priv->ioaddr,
2017 * stmmac_check_ether_addr - check if the MAC addr is valid
2018 * @priv: driver private structure
2020 * it is to verify if the MAC address is valid, in case of failures it
2021 * generates a random MAC address
2023 static void stmmac_check_ether_addr(struct stmmac_priv *priv)
2025 if (!is_valid_ether_addr(priv->dev->dev_addr)) {
2026 priv->hw->mac->get_umac_addr(priv->hw,
2027 priv->dev->dev_addr, 0);
2028 if (!is_valid_ether_addr(priv->dev->dev_addr))
2029 eth_hw_addr_random(priv->dev);
2030 netdev_info(priv->dev, "device MAC address %pM\n",
2031 priv->dev->dev_addr);
2036 * stmmac_init_dma_engine - DMA init.
2037 * @priv: driver private structure
2039 * It inits the DMA invoking the specific MAC/GMAC callback.
2040 * Some DMA parameters can be passed from the platform;
2041 * in case of these are not passed a default is kept for the MAC or GMAC.
2043 static int stmmac_init_dma_engine(struct stmmac_priv *priv)
2045 u32 rx_channels_count = priv->plat->rx_queues_to_use;
2046 u32 tx_channels_count = priv->plat->tx_queues_to_use;
2047 struct stmmac_rx_queue *rx_q;
2048 struct stmmac_tx_queue *tx_q;
2049 u32 dummy_dma_rx_phy = 0;
2050 u32 dummy_dma_tx_phy = 0;
2055 if (!priv->plat->dma_cfg || !priv->plat->dma_cfg->pbl) {
2056 dev_err(priv->device, "Invalid DMA configuration\n");
2060 if (priv->extend_desc && (priv->mode == STMMAC_RING_MODE))
2063 ret = priv->hw->dma->reset(priv->ioaddr);
2065 dev_err(priv->device, "Failed to reset the dma\n");
2069 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
2070 /* DMA Configuration */
2071 priv->hw->dma->init(priv->ioaddr, priv->plat->dma_cfg,
2072 dummy_dma_tx_phy, dummy_dma_rx_phy, atds);
2074 /* DMA RX Channel Configuration */
2075 for (chan = 0; chan < rx_channels_count; chan++) {
2076 rx_q = &priv->rx_queue[chan];
2078 priv->hw->dma->init_rx_chan(priv->ioaddr,
2079 priv->plat->dma_cfg,
2080 rx_q->dma_rx_phy, chan);
2082 rx_q->rx_tail_addr = rx_q->dma_rx_phy +
2083 (DMA_RX_SIZE * sizeof(struct dma_desc));
2084 priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
2089 /* DMA TX Channel Configuration */
2090 for (chan = 0; chan < tx_channels_count; chan++) {
2091 tx_q = &priv->tx_queue[chan];
2093 priv->hw->dma->init_chan(priv->ioaddr,
2094 priv->plat->dma_cfg,
2097 priv->hw->dma->init_tx_chan(priv->ioaddr,
2098 priv->plat->dma_cfg,
2099 tx_q->dma_tx_phy, chan);
2101 tx_q->tx_tail_addr = tx_q->dma_tx_phy +
2102 (DMA_TX_SIZE * sizeof(struct dma_desc));
2103 priv->hw->dma->set_tx_tail_ptr(priv->ioaddr,
2108 rx_q = &priv->rx_queue[chan];
2109 tx_q = &priv->tx_queue[chan];
2111 priv->hw->dma->init(priv->ioaddr, priv->plat->dma_cfg,
2112 tx_q->dma_tx_phy, rx_q->dma_rx_phy, atds);
2115 if (priv->plat->axi && priv->hw->dma->axi)
2116 priv->hw->dma->axi(priv->ioaddr, priv->plat->axi);
2122 * stmmac_tx_timer - mitigation sw timer for tx.
2123 * @data: data pointer
2125 * This is the timer handler to directly invoke the stmmac_tx_clean.
2127 static void stmmac_tx_timer(unsigned long data)
2129 struct stmmac_priv *priv = (struct stmmac_priv *)data;
2130 u32 tx_queues_count = priv->plat->tx_queues_to_use;
2133 /* let's scan all the tx queues */
2134 for (queue = 0; queue < tx_queues_count; queue++)
2135 stmmac_tx_clean(priv, queue);
2139 * stmmac_stop_all_queues - Stop all queues
2140 * @priv: driver private structure
2142 static void stmmac_stop_all_queues(struct stmmac_priv *priv)
2144 u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
2147 for (queue = 0; queue < tx_queues_cnt; queue++)
2148 netif_tx_stop_queue(netdev_get_tx_queue(priv->dev, queue));
2152 * stmmac_start_all_queues - Start all queues
2153 * @priv: driver private structure
2155 static void stmmac_start_all_queues(struct stmmac_priv *priv)
2157 u32 tx_queues_cnt = priv->plat->tx_queues_to_use;
2160 for (queue = 0; queue < tx_queues_cnt; queue++)
2161 netif_tx_start_queue(netdev_get_tx_queue(priv->dev, queue));
2165 * stmmac_disable_all_queues - Disable all queues
2166 * @priv: driver private structure
2168 static void stmmac_disable_all_queues(struct stmmac_priv *priv)
2170 u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
2173 for (queue = 0; queue < rx_queues_cnt; queue++) {
2174 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
2176 napi_disable(&rx_q->napi);
2181 * stmmac_enable_all_queues - Enable all queues
2182 * @priv: driver private structure
2184 static void stmmac_enable_all_queues(struct stmmac_priv *priv)
2186 u32 rx_queues_cnt = priv->plat->rx_queues_to_use;
2189 for (queue = 0; queue < rx_queues_cnt; queue++) {
2190 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
2192 napi_enable(&rx_q->napi);
2197 * stmmac_init_tx_coalesce - init tx mitigation options.
2198 * @priv: driver private structure
2200 * This inits the transmit coalesce parameters: i.e. timer rate,
2201 * timer handler and default threshold used for enabling the
2202 * interrupt on completion bit.
2204 static void stmmac_init_tx_coalesce(struct stmmac_priv *priv)
2206 priv->tx_coal_frames = STMMAC_TX_FRAMES;
2207 priv->tx_coal_timer = STMMAC_COAL_TX_TIMER;
2208 init_timer(&priv->txtimer);
2209 priv->txtimer.expires = STMMAC_COAL_TIMER(priv->tx_coal_timer);
2210 priv->txtimer.data = (unsigned long)priv;
2211 priv->txtimer.function = stmmac_tx_timer;
2212 add_timer(&priv->txtimer);
2215 static void stmmac_set_rings_length(struct stmmac_priv *priv)
2217 u32 rx_channels_count = priv->plat->rx_queues_to_use;
2218 u32 tx_channels_count = priv->plat->tx_queues_to_use;
2221 /* set TX ring length */
2222 if (priv->hw->dma->set_tx_ring_len) {
2223 for (chan = 0; chan < tx_channels_count; chan++)
2224 priv->hw->dma->set_tx_ring_len(priv->ioaddr,
2225 (DMA_TX_SIZE - 1), chan);
2228 /* set RX ring length */
2229 if (priv->hw->dma->set_rx_ring_len) {
2230 for (chan = 0; chan < rx_channels_count; chan++)
2231 priv->hw->dma->set_rx_ring_len(priv->ioaddr,
2232 (DMA_RX_SIZE - 1), chan);
2237 * stmmac_set_tx_queue_weight - Set TX queue weight
2238 * @priv: driver private structure
2239 * Description: It is used for setting TX queues weight
2241 static void stmmac_set_tx_queue_weight(struct stmmac_priv *priv)
2243 u32 tx_queues_count = priv->plat->tx_queues_to_use;
2247 for (queue = 0; queue < tx_queues_count; queue++) {
2248 weight = priv->plat->tx_queues_cfg[queue].weight;
2249 priv->hw->mac->set_mtl_tx_queue_weight(priv->hw, weight, queue);
2254 * stmmac_configure_cbs - Configure CBS in TX queue
2255 * @priv: driver private structure
2256 * Description: It is used for configuring CBS in AVB TX queues
2258 static void stmmac_configure_cbs(struct stmmac_priv *priv)
2260 u32 tx_queues_count = priv->plat->tx_queues_to_use;
2264 for (queue = 0; queue < tx_queues_count; queue++) {
2265 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
2266 if (mode_to_use == MTL_QUEUE_DCB)
2269 priv->hw->mac->config_cbs(priv->hw,
2270 priv->plat->tx_queues_cfg[queue].send_slope,
2271 priv->plat->tx_queues_cfg[queue].idle_slope,
2272 priv->plat->tx_queues_cfg[queue].high_credit,
2273 priv->plat->tx_queues_cfg[queue].low_credit,
2279 * stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel
2280 * @priv: driver private structure
2281 * Description: It is used for mapping RX queues to RX dma channels
2283 static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv *priv)
2285 u32 rx_queues_count = priv->plat->rx_queues_to_use;
2289 for (queue = 0; queue < rx_queues_count; queue++) {
2290 chan = priv->plat->rx_queues_cfg[queue].chan;
2291 priv->hw->mac->map_mtl_to_dma(priv->hw, queue, chan);
2296 * stmmac_mac_config_rx_queues_prio - Configure RX Queue priority
2297 * @priv: driver private structure
2298 * Description: It is used for configuring the RX Queue Priority
2300 static void stmmac_mac_config_rx_queues_prio(struct stmmac_priv *priv)
2302 u32 rx_queues_count = priv->plat->rx_queues_to_use;
2306 for (queue = 0; queue < rx_queues_count; queue++) {
2307 if (!priv->plat->rx_queues_cfg[queue].use_prio)
2310 prio = priv->plat->rx_queues_cfg[queue].prio;
2311 priv->hw->mac->rx_queue_prio(priv->hw, prio, queue);
2316 * stmmac_mac_config_tx_queues_prio - Configure TX Queue priority
2317 * @priv: driver private structure
2318 * Description: It is used for configuring the TX Queue Priority
2320 static void stmmac_mac_config_tx_queues_prio(struct stmmac_priv *priv)
2322 u32 tx_queues_count = priv->plat->tx_queues_to_use;
2326 for (queue = 0; queue < tx_queues_count; queue++) {
2327 if (!priv->plat->tx_queues_cfg[queue].use_prio)
2330 prio = priv->plat->tx_queues_cfg[queue].prio;
2331 priv->hw->mac->tx_queue_prio(priv->hw, prio, queue);
2336 * stmmac_mac_config_rx_queues_routing - Configure RX Queue Routing
2337 * @priv: driver private structure
2338 * Description: It is used for configuring the RX queue routing
2340 static void stmmac_mac_config_rx_queues_routing(struct stmmac_priv *priv)
2342 u32 rx_queues_count = priv->plat->rx_queues_to_use;
2346 for (queue = 0; queue < rx_queues_count; queue++) {
2347 /* no specific packet type routing specified for the queue */
2348 if (priv->plat->rx_queues_cfg[queue].pkt_route == 0x0)
2351 packet = priv->plat->rx_queues_cfg[queue].pkt_route;
2352 priv->hw->mac->rx_queue_prio(priv->hw, packet, queue);
2357 * stmmac_mtl_configuration - Configure MTL
2358 * @priv: driver private structure
2359 * Description: It is used for configurring MTL
2361 static void stmmac_mtl_configuration(struct stmmac_priv *priv)
2363 u32 rx_queues_count = priv->plat->rx_queues_to_use;
2364 u32 tx_queues_count = priv->plat->tx_queues_to_use;
2366 if (tx_queues_count > 1 && priv->hw->mac->set_mtl_tx_queue_weight)
2367 stmmac_set_tx_queue_weight(priv);
2369 /* Configure MTL RX algorithms */
2370 if (rx_queues_count > 1 && priv->hw->mac->prog_mtl_rx_algorithms)
2371 priv->hw->mac->prog_mtl_rx_algorithms(priv->hw,
2372 priv->plat->rx_sched_algorithm);
2374 /* Configure MTL TX algorithms */
2375 if (tx_queues_count > 1 && priv->hw->mac->prog_mtl_tx_algorithms)
2376 priv->hw->mac->prog_mtl_tx_algorithms(priv->hw,
2377 priv->plat->tx_sched_algorithm);
2379 /* Configure CBS in AVB TX queues */
2380 if (tx_queues_count > 1 && priv->hw->mac->config_cbs)
2381 stmmac_configure_cbs(priv);
2383 /* Map RX MTL to DMA channels */
2384 if (rx_queues_count > 1 && priv->hw->mac->map_mtl_to_dma)
2385 stmmac_rx_queue_dma_chan_map(priv);
2387 /* Enable MAC RX Queues */
2388 if (priv->hw->mac->rx_queue_enable)
2389 stmmac_mac_enable_rx_queues(priv);
2391 /* Set RX priorities */
2392 if (rx_queues_count > 1 && priv->hw->mac->rx_queue_prio)
2393 stmmac_mac_config_rx_queues_prio(priv);
2395 /* Set TX priorities */
2396 if (tx_queues_count > 1 && priv->hw->mac->tx_queue_prio)
2397 stmmac_mac_config_tx_queues_prio(priv);
2399 /* Set RX routing */
2400 if (rx_queues_count > 1 && priv->hw->mac->rx_queue_routing)
2401 stmmac_mac_config_rx_queues_routing(priv);
2405 * stmmac_hw_setup - setup mac in a usable state.
2406 * @dev : pointer to the device structure.
2408 * this is the main function to setup the HW in a usable state because the
2409 * dma engine is reset, the core registers are configured (e.g. AXI,
2410 * Checksum features, timers). The DMA is ready to start receiving and
2413 * 0 on success and an appropriate (-)ve integer as defined in errno.h
2416 static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
2418 struct stmmac_priv *priv = netdev_priv(dev);
2419 u32 rx_cnt = priv->plat->rx_queues_to_use;
2420 u32 tx_cnt = priv->plat->tx_queues_to_use;
2424 /* DMA initialization and SW reset */
2425 ret = stmmac_init_dma_engine(priv);
2427 netdev_err(priv->dev, "%s: DMA engine initialization failed\n",
2432 /* Copy the MAC addr into the HW */
2433 priv->hw->mac->set_umac_addr(priv->hw, dev->dev_addr, 0);
2435 /* PS and related bits will be programmed according to the speed */
2436 if (priv->hw->pcs) {
2437 int speed = priv->plat->mac_port_sel_speed;
2439 if ((speed == SPEED_10) || (speed == SPEED_100) ||
2440 (speed == SPEED_1000)) {
2441 priv->hw->ps = speed;
2443 dev_warn(priv->device, "invalid port speed\n");
2448 /* Initialize the MAC Core */
2449 priv->hw->mac->core_init(priv->hw, dev->mtu);
2452 if (priv->synopsys_id >= DWMAC_CORE_4_00)
2453 stmmac_mtl_configuration(priv);
2455 ret = priv->hw->mac->rx_ipc(priv->hw);
2457 netdev_warn(priv->dev, "RX IPC Checksum Offload disabled\n");
2458 priv->plat->rx_coe = STMMAC_RX_COE_NONE;
2459 priv->hw->rx_csum = 0;
2462 /* Enable the MAC Rx/Tx */
2463 priv->hw->mac->set_mac(priv->ioaddr, true);
2465 /* Set the HW DMA mode and the COE */
2466 stmmac_dma_operation_mode(priv);
2468 stmmac_mmc_setup(priv);
2471 ret = clk_prepare_enable(priv->plat->clk_ptp_ref);
2473 netdev_warn(priv->dev, "failed to enable PTP reference clock: %d\n", ret);
2475 ret = stmmac_init_ptp(priv);
2476 if (ret == -EOPNOTSUPP)
2477 netdev_warn(priv->dev, "PTP not supported by HW\n");
2479 netdev_warn(priv->dev, "PTP init failed\n");
2482 #ifdef CONFIG_DEBUG_FS
2483 ret = stmmac_init_fs(dev);
2485 netdev_warn(priv->dev, "%s: failed debugFS registration\n",
2488 /* Start the ball rolling... */
2489 stmmac_start_all_dma(priv);
2491 priv->tx_lpi_timer = STMMAC_DEFAULT_TWT_LS;
2493 if ((priv->use_riwt) && (priv->hw->dma->rx_watchdog)) {
2494 priv->rx_riwt = MAX_DMA_RIWT;
2495 priv->hw->dma->rx_watchdog(priv->ioaddr, MAX_DMA_RIWT, rx_cnt);
2498 if (priv->hw->pcs && priv->hw->mac->pcs_ctrl_ane)
2499 priv->hw->mac->pcs_ctrl_ane(priv->hw, 1, priv->hw->ps, 0);
2501 /* set TX and RX rings length */
2502 stmmac_set_rings_length(priv);
2506 for (chan = 0; chan < tx_cnt; chan++)
2507 priv->hw->dma->enable_tso(priv->ioaddr, 1, chan);
2513 static void stmmac_hw_teardown(struct net_device *dev)
2515 struct stmmac_priv *priv = netdev_priv(dev);
2517 clk_disable_unprepare(priv->plat->clk_ptp_ref);
2521 * stmmac_open - open entry point of the driver
2522 * @dev : pointer to the device structure.
2524 * This function is the open entry point of the driver.
2526 * 0 on success and an appropriate (-)ve integer as defined in errno.h
2529 static int stmmac_open(struct net_device *dev)
2531 struct stmmac_priv *priv = netdev_priv(dev);
2534 stmmac_check_ether_addr(priv);
2536 if (priv->hw->pcs != STMMAC_PCS_RGMII &&
2537 priv->hw->pcs != STMMAC_PCS_TBI &&
2538 priv->hw->pcs != STMMAC_PCS_RTBI) {
2539 ret = stmmac_init_phy(dev);
2541 netdev_err(priv->dev,
2542 "%s: Cannot attach to PHY (error: %d)\n",
2548 /* Extra statistics */
2549 memset(&priv->xstats, 0, sizeof(struct stmmac_extra_stats));
2550 priv->xstats.threshold = tc;
2552 priv->rx_copybreak = STMMAC_RX_COPYBREAK;
2554 ret = stmmac_hw_setup(dev, true);
2556 netdev_err(priv->dev, "%s: Hw setup failed\n", __func__);
2560 stmmac_init_tx_coalesce(priv);
2563 phy_start(dev->phydev);
2565 /* Request the IRQ lines */
2566 ret = request_irq(dev->irq, stmmac_interrupt,
2567 IRQF_SHARED, dev->name, dev);
2568 if (unlikely(ret < 0)) {
2569 netdev_err(priv->dev,
2570 "%s: ERROR: allocating the IRQ %d (error: %d)\n",
2571 __func__, dev->irq, ret);
2575 /* Request the Wake IRQ in case of another line is used for WoL */
2576 if (priv->wol_irq != dev->irq) {
2577 ret = request_irq(priv->wol_irq, stmmac_interrupt,
2578 IRQF_SHARED, dev->name, dev);
2579 if (unlikely(ret < 0)) {
2580 netdev_err(priv->dev,
2581 "%s: ERROR: allocating the WoL IRQ %d (%d)\n",
2582 __func__, priv->wol_irq, ret);
2587 /* Request the IRQ lines */
2588 if (priv->lpi_irq > 0) {
2589 ret = request_irq(priv->lpi_irq, stmmac_interrupt, IRQF_SHARED,
2591 if (unlikely(ret < 0)) {
2592 netdev_err(priv->dev,
2593 "%s: ERROR: allocating the LPI IRQ %d (%d)\n",
2594 __func__, priv->lpi_irq, ret);
2599 stmmac_enable_all_queues(priv);
2600 stmmac_start_all_queues(priv);
2605 if (priv->wol_irq != dev->irq)
2606 free_irq(priv->wol_irq, dev);
2608 free_irq(dev->irq, dev);
2611 phy_stop(dev->phydev);
2613 del_timer_sync(&priv->txtimer);
2614 stmmac_hw_teardown(dev);
2616 free_dma_desc_resources(priv);
2619 phy_disconnect(dev->phydev);
2625 * stmmac_release - close entry point of the driver
2626 * @dev : device pointer.
2628 * This is the stop entry point of the driver.
2630 static int stmmac_release(struct net_device *dev)
2632 struct stmmac_priv *priv = netdev_priv(dev);
2634 if (priv->eee_enabled)
2635 del_timer_sync(&priv->eee_ctrl_timer);
2637 /* Stop and disconnect the PHY */
2639 phy_stop(dev->phydev);
2640 phy_disconnect(dev->phydev);
2643 stmmac_stop_all_queues(priv);
2645 stmmac_disable_all_queues(priv);
2647 del_timer_sync(&priv->txtimer);
2649 /* Free the IRQ lines */
2650 free_irq(dev->irq, dev);
2651 if (priv->wol_irq != dev->irq)
2652 free_irq(priv->wol_irq, dev);
2653 if (priv->lpi_irq > 0)
2654 free_irq(priv->lpi_irq, dev);
2656 /* Stop TX/RX DMA and clear the descriptors */
2657 stmmac_stop_all_dma(priv);
2659 /* Release and free the Rx/Tx resources */
2660 free_dma_desc_resources(priv);
2662 /* Disable the MAC Rx/Tx */
2663 priv->hw->mac->set_mac(priv->ioaddr, false);
2665 netif_carrier_off(dev);
2667 #ifdef CONFIG_DEBUG_FS
2668 stmmac_exit_fs(dev);
2671 stmmac_release_ptp(priv);
2677 * stmmac_tso_allocator - close entry point of the driver
2678 * @priv: driver private structure
2679 * @des: buffer start address
2680 * @total_len: total length to fill in descriptors
2681 * @last_segmant: condition for the last descriptor
2682 * @queue: TX queue index
2684 * This function fills descriptor and request new descriptors according to
2685 * buffer length to fill
2687 static void stmmac_tso_allocator(struct stmmac_priv *priv, unsigned int des,
2688 int total_len, bool last_segment, u32 queue)
2690 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
2691 struct dma_desc *desc;
2695 tmp_len = total_len;
2697 while (tmp_len > 0) {
2698 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
2699 desc = tx_q->dma_tx + tx_q->cur_tx;
2701 desc->des0 = cpu_to_le32(des + (total_len - tmp_len));
2702 buff_size = tmp_len >= TSO_MAX_BUFF_SIZE ?
2703 TSO_MAX_BUFF_SIZE : tmp_len;
2705 priv->hw->desc->prepare_tso_tx_desc(desc, 0, buff_size,
2707 (last_segment) && (buff_size < TSO_MAX_BUFF_SIZE),
2710 tmp_len -= TSO_MAX_BUFF_SIZE;
2715 * stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO)
2716 * @skb : the socket buffer
2717 * @dev : device pointer
2718 * Description: this is the transmit function that is called on TSO frames
2719 * (support available on GMAC4 and newer chips).
2720 * Diagram below show the ring programming in case of TSO frames:
2724 * | DES0 |---> buffer1 = L2/L3/L4 header
2725 * | DES1 |---> TCP Payload (can continue on next descr...)
2726 * | DES2 |---> buffer 1 and 2 len
2727 * | DES3 |---> must set TSE, TCP hdr len-> [22:19]. TCP payload len [17:0]
2733 * | DES0 | --| Split TCP Payload on Buffers 1 and 2
2735 * | DES2 | --> buffer 1 and 2 len
2739 * mss is fixed when enable tso, so w/o programming the TDES3 ctx field.
2741 static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
2743 struct dma_desc *desc, *first, *mss_desc = NULL;
2744 struct stmmac_priv *priv = netdev_priv(dev);
2745 u32 queue = skb_get_queue_mapping(skb);
2746 int nfrags = skb_shinfo(skb)->nr_frags;
2747 unsigned int first_entry, des;
2748 struct stmmac_tx_queue *tx_q;
2749 int tmp_pay_len = 0;
2754 tx_q = &priv->tx_queue[queue];
2756 /* Compute header lengths */
2757 proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2759 /* Desc availability based on threshold should be enough safe */
2760 if (unlikely(stmmac_tx_avail(priv, queue) <
2761 (((skb->len - proto_hdr_len) / TSO_MAX_BUFF_SIZE + 1)))) {
2762 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) {
2763 netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
2764 /* This is a hard error, log it. */
2765 netdev_err(priv->dev,
2766 "%s: Tx Ring full when queue awake\n",
2769 return NETDEV_TX_BUSY;
2772 pay_len = skb_headlen(skb) - proto_hdr_len; /* no frags */
2774 mss = skb_shinfo(skb)->gso_size;
2776 /* set new MSS value if needed */
2777 if (mss != priv->mss) {
2778 mss_desc = tx_q->dma_tx + tx_q->cur_tx;
2779 priv->hw->desc->set_mss(mss_desc, mss);
2781 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
2784 if (netif_msg_tx_queued(priv)) {
2785 pr_info("%s: tcphdrlen %d, hdr_len %d, pay_len %d, mss %d\n",
2786 __func__, tcp_hdrlen(skb), proto_hdr_len, pay_len, mss);
2787 pr_info("\tskb->len %d, skb->data_len %d\n", skb->len,
2791 first_entry = tx_q->cur_tx;
2793 desc = tx_q->dma_tx + first_entry;
2796 /* first descriptor: fill Headers on Buf1 */
2797 des = dma_map_single(priv->device, skb->data, skb_headlen(skb),
2799 if (dma_mapping_error(priv->device, des))
2802 tx_q->tx_skbuff_dma[first_entry].buf = des;
2803 tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb);
2804 tx_q->tx_skbuff[first_entry] = skb;
2806 first->des0 = cpu_to_le32(des);
2808 /* Fill start of payload in buff2 of first descriptor */
2810 first->des1 = cpu_to_le32(des + proto_hdr_len);
2812 /* If needed take extra descriptors to fill the remaining payload */
2813 tmp_pay_len = pay_len - TSO_MAX_BUFF_SIZE;
2815 stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0), queue);
2817 /* Prepare fragments */
2818 for (i = 0; i < nfrags; i++) {
2819 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2821 des = skb_frag_dma_map(priv->device, frag, 0,
2822 skb_frag_size(frag),
2824 if (dma_mapping_error(priv->device, des))
2827 stmmac_tso_allocator(priv, des, skb_frag_size(frag),
2828 (i == nfrags - 1), queue);
2830 tx_q->tx_skbuff_dma[tx_q->cur_tx].buf = des;
2831 tx_q->tx_skbuff_dma[tx_q->cur_tx].len = skb_frag_size(frag);
2832 tx_q->tx_skbuff[tx_q->cur_tx] = NULL;
2833 tx_q->tx_skbuff_dma[tx_q->cur_tx].map_as_page = true;
2836 tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true;
2838 tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
2840 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) {
2841 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n",
2843 netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
2846 dev->stats.tx_bytes += skb->len;
2847 priv->xstats.tx_tso_frames++;
2848 priv->xstats.tx_tso_nfrags += nfrags;
2850 /* Manage tx mitigation */
2851 priv->tx_count_frames += nfrags + 1;
2852 if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
2853 mod_timer(&priv->txtimer,
2854 STMMAC_COAL_TIMER(priv->tx_coal_timer));
2856 priv->tx_count_frames = 0;
2857 priv->hw->desc->set_tx_ic(desc);
2858 priv->xstats.tx_set_ic_bit++;
2861 if (!priv->hwts_tx_en)
2862 skb_tx_timestamp(skb);
2864 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
2865 priv->hwts_tx_en)) {
2866 /* declare that device is doing timestamping */
2867 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2868 priv->hw->desc->enable_tx_timestamp(first);
2871 /* Complete the first descriptor before granting the DMA */
2872 priv->hw->desc->prepare_tso_tx_desc(first, 1,
2875 1, tx_q->tx_skbuff_dma[first_entry].last_segment,
2876 tcp_hdrlen(skb) / 4, (skb->len - proto_hdr_len));
2878 /* If context desc is used to change MSS */
2880 priv->hw->desc->set_tx_owner(mss_desc);
2882 /* The own bit must be the latest setting done when prepare the
2883 * descriptor and then barrier is needed to make sure that
2884 * all is coherent before granting the DMA engine.
2888 if (netif_msg_pktdata(priv)) {
2889 pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n",
2890 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry,
2891 tx_q->cur_tx, first, nfrags);
2893 priv->hw->desc->display_ring((void *)tx_q->dma_tx, DMA_TX_SIZE,
2896 pr_info(">>> frame to be transmitted: ");
2897 print_pkt(skb->data, skb_headlen(skb));
2900 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len);
2902 priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, tx_q->tx_tail_addr,
2905 return NETDEV_TX_OK;
2908 dev_err(priv->device, "Tx dma map failed\n");
2910 priv->dev->stats.tx_dropped++;
2911 return NETDEV_TX_OK;
2915 * stmmac_xmit - Tx entry point of the driver
2916 * @skb : the socket buffer
2917 * @dev : device pointer
2918 * Description : this is the tx entry point of the driver.
2919 * It programs the chain or the ring and supports oversized frames
2922 static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
2924 struct stmmac_priv *priv = netdev_priv(dev);
2925 unsigned int nopaged_len = skb_headlen(skb);
2926 int i, csum_insertion = 0, is_jumbo = 0;
2927 u32 queue = skb_get_queue_mapping(skb);
2928 int nfrags = skb_shinfo(skb)->nr_frags;
2929 unsigned int entry, first_entry;
2930 struct dma_desc *desc, *first;
2931 struct stmmac_tx_queue *tx_q;
2932 unsigned int enh_desc;
2935 tx_q = &priv->tx_queue[queue];
2937 /* Manage oversized TCP frames for GMAC4 device */
2938 if (skb_is_gso(skb) && priv->tso) {
2939 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2940 return stmmac_tso_xmit(skb, dev);
2943 if (unlikely(stmmac_tx_avail(priv, queue) < nfrags + 1)) {
2944 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, queue))) {
2945 netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
2946 /* This is a hard error, log it. */
2947 netdev_err(priv->dev,
2948 "%s: Tx Ring full when queue awake\n",
2951 return NETDEV_TX_BUSY;
2954 if (priv->tx_path_in_lpi_mode)
2955 stmmac_disable_eee_mode(priv);
2957 entry = tx_q->cur_tx;
2958 first_entry = entry;
2960 csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
2962 if (likely(priv->extend_desc))
2963 desc = (struct dma_desc *)(tx_q->dma_etx + entry);
2965 desc = tx_q->dma_tx + entry;
2969 tx_q->tx_skbuff[first_entry] = skb;
2971 enh_desc = priv->plat->enh_desc;
2972 /* To program the descriptors according to the size of the frame */
2974 is_jumbo = priv->hw->mode->is_jumbo_frm(skb->len, enh_desc);
2976 if (unlikely(is_jumbo) && likely(priv->synopsys_id <
2978 entry = priv->hw->mode->jumbo_frm(tx_q, skb, csum_insertion);
2979 if (unlikely(entry < 0))
2983 for (i = 0; i < nfrags; i++) {
2984 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2985 int len = skb_frag_size(frag);
2986 bool last_segment = (i == (nfrags - 1));
2988 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
2990 if (likely(priv->extend_desc))
2991 desc = (struct dma_desc *)(tx_q->dma_etx + entry);
2993 desc = tx_q->dma_tx + entry;
2995 des = skb_frag_dma_map(priv->device, frag, 0, len,
2997 if (dma_mapping_error(priv->device, des))
2998 goto dma_map_err; /* should reuse desc w/o issues */
3000 tx_q->tx_skbuff[entry] = NULL;
3002 tx_q->tx_skbuff_dma[entry].buf = des;
3003 if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
3004 desc->des0 = cpu_to_le32(des);
3006 desc->des2 = cpu_to_le32(des);
3008 tx_q->tx_skbuff_dma[entry].map_as_page = true;
3009 tx_q->tx_skbuff_dma[entry].len = len;
3010 tx_q->tx_skbuff_dma[entry].last_segment = last_segment;
3012 /* Prepare the descriptor and set the own bit too */
3013 priv->hw->desc->prepare_tx_desc(desc, 0, len, csum_insertion,
3014 priv->mode, 1, last_segment);
3017 entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
3019 tx_q->cur_tx = entry;
3021 if (netif_msg_pktdata(priv)) {
3024 netdev_dbg(priv->dev,
3025 "%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d",
3026 __func__, tx_q->cur_tx, tx_q->dirty_tx, first_entry,
3027 entry, first, nfrags);
3029 if (priv->extend_desc)
3030 tx_head = (void *)tx_q->dma_etx;
3032 tx_head = (void *)tx_q->dma_tx;
3034 priv->hw->desc->display_ring(tx_head, DMA_TX_SIZE, false);
3036 netdev_dbg(priv->dev, ">>> frame to be transmitted: ");
3037 print_pkt(skb->data, skb->len);
3040 if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) {
3041 netif_dbg(priv, hw, priv->dev, "%s: stop transmitted packets\n",
3043 netif_tx_stop_queue(netdev_get_tx_queue(dev, queue));
3046 dev->stats.tx_bytes += skb->len;
3048 /* According to the coalesce parameter the IC bit for the latest
3049 * segment is reset and the timer re-started to clean the tx status.
3050 * This approach takes care about the fragments: desc is the first
3051 * element in case of no SG.
3053 priv->tx_count_frames += nfrags + 1;
3054 if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
3055 mod_timer(&priv->txtimer,
3056 STMMAC_COAL_TIMER(priv->tx_coal_timer));
3058 priv->tx_count_frames = 0;
3059 priv->hw->desc->set_tx_ic(desc);
3060 priv->xstats.tx_set_ic_bit++;
3063 if (!priv->hwts_tx_en)
3064 skb_tx_timestamp(skb);
3066 /* Ready to fill the first descriptor and set the OWN bit w/o any
3067 * problems because all the descriptors are actually ready to be
3068 * passed to the DMA engine.
3070 if (likely(!is_jumbo)) {
3071 bool last_segment = (nfrags == 0);
3073 des = dma_map_single(priv->device, skb->data,
3074 nopaged_len, DMA_TO_DEVICE);
3075 if (dma_mapping_error(priv->device, des))
3078 tx_q->tx_skbuff_dma[first_entry].buf = des;
3079 if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
3080 first->des0 = cpu_to_le32(des);
3082 first->des2 = cpu_to_le32(des);
3084 tx_q->tx_skbuff_dma[first_entry].len = nopaged_len;
3085 tx_q->tx_skbuff_dma[first_entry].last_segment = last_segment;
3087 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
3088 priv->hwts_tx_en)) {
3089 /* declare that device is doing timestamping */
3090 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
3091 priv->hw->desc->enable_tx_timestamp(first);
3094 /* Prepare the first descriptor setting the OWN bit too */
3095 priv->hw->desc->prepare_tx_desc(first, 1, nopaged_len,
3096 csum_insertion, priv->mode, 1,
3099 /* The own bit must be the latest setting done when prepare the
3100 * descriptor and then barrier is needed to make sure that
3101 * all is coherent before granting the DMA engine.
3106 netdev_tx_sent_queue(netdev_get_tx_queue(dev, queue), skb->len);
3108 if (priv->synopsys_id < DWMAC_CORE_4_00)
3109 priv->hw->dma->enable_dma_transmission(priv->ioaddr);
3111 priv->hw->dma->set_tx_tail_ptr(priv->ioaddr, tx_q->tx_tail_addr,
3114 return NETDEV_TX_OK;
3117 netdev_err(priv->dev, "Tx DMA map failed\n");
3119 priv->dev->stats.tx_dropped++;
3120 return NETDEV_TX_OK;
3123 static void stmmac_rx_vlan(struct net_device *dev, struct sk_buff *skb)
3125 struct ethhdr *ehdr;
3128 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) ==
3129 NETIF_F_HW_VLAN_CTAG_RX &&
3130 !__vlan_get_tag(skb, &vlanid)) {
3131 /* pop the vlan tag */
3132 ehdr = (struct ethhdr *)skb->data;
3133 memmove(skb->data + VLAN_HLEN, ehdr, ETH_ALEN * 2);
3134 skb_pull(skb, VLAN_HLEN);
3135 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
3140 static inline int stmmac_rx_threshold_count(struct stmmac_rx_queue *rx_q)
3142 if (rx_q->rx_zeroc_thresh < STMMAC_RX_THRESH)
3149 * stmmac_rx_refill - refill used skb preallocated buffers
3150 * @priv: driver private structure
3151 * @queue: RX queue index
3152 * Description : this is to reallocate the skb for the reception process
3153 * that is based on zero-copy.
3155 static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
3157 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
3158 int dirty = stmmac_rx_dirty(priv, queue);
3159 unsigned int entry = rx_q->dirty_rx;
3160 int bfsize = priv->dma_buf_sz;
3162 while (dirty-- > 0) {
3165 if (priv->extend_desc)
3166 p = (struct dma_desc *)(rx_q->dma_erx + entry);
3168 p = rx_q->dma_rx + entry;
3170 if (!rx_q->rx_skbuff[entry]) {
3171 struct sk_buff *skb;
3173 skb = netdev_alloc_skb_ip_align(priv->dev, bfsize);
3174 if (unlikely(!skb)) {
3175 /* so for a while no zero-copy! */
3176 rx_q->rx_zeroc_thresh = STMMAC_RX_THRESH;
3177 if (unlikely(net_ratelimit()))
3178 dev_err(priv->device,
3179 "fail to alloc skb entry %d\n",
3184 rx_q->rx_skbuff[entry] = skb;
3185 rx_q->rx_skbuff_dma[entry] =
3186 dma_map_single(priv->device, skb->data, bfsize,
3188 if (dma_mapping_error(priv->device,
3189 rx_q->rx_skbuff_dma[entry])) {
3190 netdev_err(priv->dev, "Rx DMA map failed\n");
3195 if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00)) {
3196 p->des0 = cpu_to_le32(rx_q->rx_skbuff_dma[entry]);
3199 p->des2 = cpu_to_le32(rx_q->rx_skbuff_dma[entry]);
3201 if (priv->hw->mode->refill_desc3)
3202 priv->hw->mode->refill_desc3(rx_q, p);
3204 if (rx_q->rx_zeroc_thresh > 0)
3205 rx_q->rx_zeroc_thresh--;
3207 netif_dbg(priv, rx_status, priv->dev,
3208 "refill entry #%d\n", entry);
3212 if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
3213 priv->hw->desc->init_rx_desc(p, priv->use_riwt, 0, 0);
3215 priv->hw->desc->set_rx_owner(p);
3219 entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
3221 rx_q->dirty_rx = entry;
3225 * stmmac_rx - manage the receive process
3226 * @priv: driver private structure
3227 * @limit: napi bugget.
3228 * Description : this the function called by the napi poll method.
3229 * It gets all the frames inside the ring.
3231 static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
3233 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
3234 unsigned int entry = rx_q->cur_rx;
3235 int coe = priv->hw->rx_csum;
3236 unsigned int next_entry;
3237 unsigned int count = 0;
3239 if (netif_msg_rx_status(priv)) {
3242 netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__);
3243 if (priv->extend_desc)
3244 rx_head = (void *)rx_q->dma_erx;
3246 rx_head = (void *)rx_q->dma_rx;
3248 priv->hw->desc->display_ring(rx_head, DMA_RX_SIZE, true);
3250 while (count < limit) {
3253 struct dma_desc *np;
3255 if (priv->extend_desc)
3256 p = (struct dma_desc *)(rx_q->dma_erx + entry);
3258 p = rx_q->dma_rx + entry;
3260 /* read the status of the incoming frame */
3261 status = priv->hw->desc->rx_status(&priv->dev->stats,
3263 /* check if managed by the DMA otherwise go ahead */
3264 if (unlikely(status & dma_own))
3269 rx_q->cur_rx = STMMAC_GET_ENTRY(rx_q->cur_rx, DMA_RX_SIZE);
3270 next_entry = rx_q->cur_rx;
3272 if (priv->extend_desc)
3273 np = (struct dma_desc *)(rx_q->dma_erx + next_entry);
3275 np = rx_q->dma_rx + next_entry;
3279 if ((priv->extend_desc) && (priv->hw->desc->rx_extended_status))
3280 priv->hw->desc->rx_extended_status(&priv->dev->stats,
3284 if (unlikely(status == discard_frame)) {
3285 priv->dev->stats.rx_errors++;
3286 if (priv->hwts_rx_en && !priv->extend_desc) {
3287 /* DESC2 & DESC3 will be overwritten by device
3288 * with timestamp value, hence reinitialize
3289 * them in stmmac_rx_refill() function so that
3290 * device can reuse it.
3292 rx_q->rx_skbuff[entry] = NULL;
3293 dma_unmap_single(priv->device,
3294 rx_q->rx_skbuff_dma[entry],
3299 struct sk_buff *skb;
3303 if (unlikely(priv->synopsys_id >= DWMAC_CORE_4_00))
3304 des = le32_to_cpu(p->des0);
3306 des = le32_to_cpu(p->des2);
3308 frame_len = priv->hw->desc->get_rx_frame_len(p, coe);
3310 /* If frame length is greater than skb buffer size
3311 * (preallocated during init) then the packet is
3314 if (frame_len > priv->dma_buf_sz) {
3315 netdev_err(priv->dev,
3316 "len %d larger than size (%d)\n",
3317 frame_len, priv->dma_buf_sz);
3318 priv->dev->stats.rx_length_errors++;
3322 /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3
3323 * Type frames (LLC/LLC-SNAP)
3325 if (unlikely(status != llc_snap))
3326 frame_len -= ETH_FCS_LEN;
3328 if (netif_msg_rx_status(priv)) {
3329 netdev_dbg(priv->dev, "\tdesc: %p [entry %d] buff=0x%x\n",
3331 if (frame_len > ETH_FRAME_LEN)
3332 netdev_dbg(priv->dev, "frame size %d, COE: %d\n",
3336 /* The zero-copy is always used for all the sizes
3337 * in case of GMAC4 because it needs
3338 * to refill the used descriptors, always.
3340 if (unlikely(!priv->plat->has_gmac4 &&
3341 ((frame_len < priv->rx_copybreak) ||
3342 stmmac_rx_threshold_count(rx_q)))) {
3343 skb = netdev_alloc_skb_ip_align(priv->dev,
3345 if (unlikely(!skb)) {
3346 if (net_ratelimit())
3347 dev_warn(priv->device,
3348 "packet dropped\n");
3349 priv->dev->stats.rx_dropped++;
3353 dma_sync_single_for_cpu(priv->device,
3357 skb_copy_to_linear_data(skb,
3359 rx_skbuff[entry]->data,
3362 skb_put(skb, frame_len);
3363 dma_sync_single_for_device(priv->device,
3368 skb = rx_q->rx_skbuff[entry];
3369 if (unlikely(!skb)) {
3370 netdev_err(priv->dev,
3371 "%s: Inconsistent Rx chain\n",
3373 priv->dev->stats.rx_dropped++;
3376 prefetch(skb->data - NET_IP_ALIGN);
3377 rx_q->rx_skbuff[entry] = NULL;
3378 rx_q->rx_zeroc_thresh++;
3380 skb_put(skb, frame_len);
3381 dma_unmap_single(priv->device,
3382 rx_q->rx_skbuff_dma[entry],
3387 if (netif_msg_pktdata(priv)) {
3388 netdev_dbg(priv->dev, "frame received (%dbytes)",
3390 print_pkt(skb->data, frame_len);
3393 stmmac_get_rx_hwtstamp(priv, p, np, skb);
3395 stmmac_rx_vlan(priv->dev, skb);
3397 skb->protocol = eth_type_trans(skb, priv->dev);
3400 skb_checksum_none_assert(skb);
3402 skb->ip_summed = CHECKSUM_UNNECESSARY;
3404 napi_gro_receive(&rx_q->napi, skb);
3406 priv->dev->stats.rx_packets++;
3407 priv->dev->stats.rx_bytes += frame_len;
3412 stmmac_rx_refill(priv, queue);
3414 priv->xstats.rx_pkt_n += count;
3420 * stmmac_poll - stmmac poll method (NAPI)
3421 * @napi : pointer to the napi structure.
3422 * @budget : maximum number of packets that the current CPU can receive from
3425 * To look at the incoming frames and clear the tx resources.
3427 static int stmmac_poll(struct napi_struct *napi, int budget)
3429 struct stmmac_rx_queue *rx_q =
3430 container_of(napi, struct stmmac_rx_queue, napi);
3431 struct stmmac_priv *priv = rx_q->priv_data;
3432 u32 tx_count = priv->dma_cap.number_tx_queues;
3433 u32 chan = rx_q->queue_index;
3437 priv->xstats.napi_poll++;
3438 /* check all the queues */
3439 for (queue = 0; queue < tx_count; queue++)
3440 stmmac_tx_clean(priv, queue);
3442 /* Process RX packets from this queue */
3443 work_done = stmmac_rx(priv, budget, rx_q->queue_index);
3445 if (work_done < budget) {
3446 napi_complete_done(napi, work_done);
3447 stmmac_enable_dma_irq(priv, chan);
3454 * @dev : Pointer to net device structure
3455 * Description: this function is called when a packet transmission fails to
3456 * complete within a reasonable time. The driver will mark the error in the
3457 * netdev structure and arrange for the device to be reset to a sane state
3458 * in order to transmit a new packet.
3460 static void stmmac_tx_timeout(struct net_device *dev)
3462 struct stmmac_priv *priv = netdev_priv(dev);
3463 u32 tx_count = priv->plat->tx_queues_to_use;
3466 /* Clear Tx resources and restart transmitting again */
3467 for (chan = 0; chan < tx_count; chan++)
3468 stmmac_tx_err(priv, chan);
3472 * stmmac_set_rx_mode - entry point for multicast addressing
3473 * @dev : pointer to the device structure
3475 * This function is a driver entry point which gets called by the kernel
3476 * whenever multicast addresses must be enabled/disabled.
3480 static void stmmac_set_rx_mode(struct net_device *dev)
3482 struct stmmac_priv *priv = netdev_priv(dev);
3484 priv->hw->mac->set_filter(priv->hw, dev);
3488 * stmmac_change_mtu - entry point to change MTU size for the device.
3489 * @dev : device pointer.
3490 * @new_mtu : the new MTU size for the device.
3491 * Description: the Maximum Transfer Unit (MTU) is used by the network layer
3492 * to drive packet transmission. Ethernet has an MTU of 1500 octets
3493 * (ETH_DATA_LEN). This value can be changed with ifconfig.
3495 * 0 on success and an appropriate (-)ve integer as defined in errno.h
3498 static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
3500 struct stmmac_priv *priv = netdev_priv(dev);
3502 if (netif_running(dev)) {
3503 netdev_err(priv->dev, "must be stopped to change its MTU\n");
3509 netdev_update_features(dev);
3514 static netdev_features_t stmmac_fix_features(struct net_device *dev,
3515 netdev_features_t features)
3517 struct stmmac_priv *priv = netdev_priv(dev);
3519 if (priv->plat->rx_coe == STMMAC_RX_COE_NONE)
3520 features &= ~NETIF_F_RXCSUM;
3522 if (!priv->plat->tx_coe)
3523 features &= ~NETIF_F_CSUM_MASK;
3525 /* Some GMAC devices have a bugged Jumbo frame support that
3526 * needs to have the Tx COE disabled for oversized frames
3527 * (due to limited buffer sizes). In this case we disable
3528 * the TX csum insertion in the TDES and not use SF.
3530 if (priv->plat->bugged_jumbo && (dev->mtu > ETH_DATA_LEN))
3531 features &= ~NETIF_F_CSUM_MASK;
3533 /* Disable tso if asked by ethtool */
3534 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) {
3535 if (features & NETIF_F_TSO)
3544 static int stmmac_set_features(struct net_device *netdev,
3545 netdev_features_t features)
3547 struct stmmac_priv *priv = netdev_priv(netdev);
3549 /* Keep the COE Type in case of csum is supporting */
3550 if (features & NETIF_F_RXCSUM)
3551 priv->hw->rx_csum = priv->plat->rx_coe;
3553 priv->hw->rx_csum = 0;
3554 /* No check needed because rx_coe has been set before and it will be
3555 * fixed in case of issue.
3557 priv->hw->mac->rx_ipc(priv->hw);
3563 * stmmac_interrupt - main ISR
3564 * @irq: interrupt number.
3565 * @dev_id: to pass the net device pointer.
3566 * Description: this is the main driver interrupt service routine.
3568 * o DMA service routine (to manage incoming frame reception and transmission
3570 * o Core interrupts to manage: remote wake-up, management counter, LPI
3573 static irqreturn_t stmmac_interrupt(int irq, void *dev_id)
3575 struct net_device *dev = (struct net_device *)dev_id;
3576 struct stmmac_priv *priv = netdev_priv(dev);
3577 u32 rx_cnt = priv->plat->rx_queues_to_use;
3578 u32 tx_cnt = priv->plat->tx_queues_to_use;
3582 queues_count = (rx_cnt > tx_cnt) ? rx_cnt : tx_cnt;
3585 pm_wakeup_event(priv->device, 0);
3587 if (unlikely(!dev)) {
3588 netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__);
3592 /* To handle GMAC own interrupts */
3593 if ((priv->plat->has_gmac) || (priv->plat->has_gmac4)) {
3594 int status = priv->hw->mac->host_irq_status(priv->hw,
3597 if (unlikely(status)) {
3598 /* For LPI we need to save the tx status */
3599 if (status & CORE_IRQ_TX_PATH_IN_LPI_MODE)
3600 priv->tx_path_in_lpi_mode = true;
3601 if (status & CORE_IRQ_TX_PATH_EXIT_LPI_MODE)
3602 priv->tx_path_in_lpi_mode = false;
3605 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
3606 for (queue = 0; queue < queues_count; queue++) {
3607 struct stmmac_rx_queue *rx_q =
3608 &priv->rx_queue[queue];
3611 priv->hw->mac->host_mtl_irq_status(priv->hw,
3614 if (status & CORE_IRQ_MTL_RX_OVERFLOW &&
3615 priv->hw->dma->set_rx_tail_ptr)
3616 priv->hw->dma->set_rx_tail_ptr(priv->ioaddr,
3622 /* PCS link status */
3623 if (priv->hw->pcs) {
3624 if (priv->xstats.pcs_link)
3625 netif_carrier_on(dev);
3627 netif_carrier_off(dev);
3631 /* To handle DMA interrupts */
3632 stmmac_dma_interrupt(priv);
3637 #ifdef CONFIG_NET_POLL_CONTROLLER
3638 /* Polling receive - used by NETCONSOLE and other diagnostic tools
3639 * to allow network I/O with interrupts disabled.
3641 static void stmmac_poll_controller(struct net_device *dev)
3643 disable_irq(dev->irq);
3644 stmmac_interrupt(dev->irq, dev);
3645 enable_irq(dev->irq);
3650 * stmmac_ioctl - Entry point for the Ioctl
3651 * @dev: Device pointer.
3652 * @rq: An IOCTL specefic structure, that can contain a pointer to
3653 * a proprietary structure used to pass information to the driver.
3654 * @cmd: IOCTL command
3656 * Currently it supports the phy_mii_ioctl(...) and HW time stamping.
3658 static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3660 int ret = -EOPNOTSUPP;
3662 if (!netif_running(dev))
3671 ret = phy_mii_ioctl(dev->phydev, rq, cmd);
3674 ret = stmmac_hwtstamp_ioctl(dev, rq);
3683 #ifdef CONFIG_DEBUG_FS
3684 static struct dentry *stmmac_fs_dir;
3686 static void sysfs_display_ring(void *head, int size, int extend_desc,
3687 struct seq_file *seq)
3690 struct dma_extended_desc *ep = (struct dma_extended_desc *)head;
3691 struct dma_desc *p = (struct dma_desc *)head;
3693 for (i = 0; i < size; i++) {
3695 seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
3696 i, (unsigned int)virt_to_phys(ep),
3697 le32_to_cpu(ep->basic.des0),
3698 le32_to_cpu(ep->basic.des1),
3699 le32_to_cpu(ep->basic.des2),
3700 le32_to_cpu(ep->basic.des3));
3703 seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
3704 i, (unsigned int)virt_to_phys(ep),
3705 le32_to_cpu(p->des0), le32_to_cpu(p->des1),
3706 le32_to_cpu(p->des2), le32_to_cpu(p->des3));
3709 seq_printf(seq, "\n");
3713 static int stmmac_sysfs_ring_read(struct seq_file *seq, void *v)
3715 struct net_device *dev = seq->private;
3716 struct stmmac_priv *priv = netdev_priv(dev);
3717 u32 rx_count = priv->plat->rx_queues_to_use;
3718 u32 tx_count = priv->plat->tx_queues_to_use;
3721 for (queue = 0; queue < rx_count; queue++) {
3722 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
3724 seq_printf(seq, "RX Queue %d:\n", queue);
3726 if (priv->extend_desc) {
3727 seq_printf(seq, "Extended descriptor ring:\n");
3728 sysfs_display_ring((void *)rx_q->dma_erx,
3729 DMA_RX_SIZE, 1, seq);
3731 seq_printf(seq, "Descriptor ring:\n");
3732 sysfs_display_ring((void *)rx_q->dma_rx,
3733 DMA_RX_SIZE, 0, seq);
3737 for (queue = 0; queue < tx_count; queue++) {
3738 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
3740 seq_printf(seq, "TX Queue %d:\n", queue);
3742 if (priv->extend_desc) {
3743 seq_printf(seq, "Extended descriptor ring:\n");
3744 sysfs_display_ring((void *)tx_q->dma_etx,
3745 DMA_TX_SIZE, 1, seq);
3747 seq_printf(seq, "Descriptor ring:\n");
3748 sysfs_display_ring((void *)tx_q->dma_tx,
3749 DMA_TX_SIZE, 0, seq);
3756 static int stmmac_sysfs_ring_open(struct inode *inode, struct file *file)
3758 return single_open(file, stmmac_sysfs_ring_read, inode->i_private);
3761 /* Debugfs files, should appear in /sys/kernel/debug/stmmaceth/eth0 */
3763 static const struct file_operations stmmac_rings_status_fops = {
3764 .owner = THIS_MODULE,
3765 .open = stmmac_sysfs_ring_open,
3767 .llseek = seq_lseek,
3768 .release = single_release,
3771 static int stmmac_sysfs_dma_cap_read(struct seq_file *seq, void *v)
3773 struct net_device *dev = seq->private;
3774 struct stmmac_priv *priv = netdev_priv(dev);
3776 if (!priv->hw_cap_support) {
3777 seq_printf(seq, "DMA HW features not supported\n");
3781 seq_printf(seq, "==============================\n");
3782 seq_printf(seq, "\tDMA HW features\n");
3783 seq_printf(seq, "==============================\n");
3785 seq_printf(seq, "\t10/100 Mbps: %s\n",
3786 (priv->dma_cap.mbps_10_100) ? "Y" : "N");
3787 seq_printf(seq, "\t1000 Mbps: %s\n",
3788 (priv->dma_cap.mbps_1000) ? "Y" : "N");
3789 seq_printf(seq, "\tHalf duplex: %s\n",
3790 (priv->dma_cap.half_duplex) ? "Y" : "N");
3791 seq_printf(seq, "\tHash Filter: %s\n",
3792 (priv->dma_cap.hash_filter) ? "Y" : "N");
3793 seq_printf(seq, "\tMultiple MAC address registers: %s\n",
3794 (priv->dma_cap.multi_addr) ? "Y" : "N");
3795 seq_printf(seq, "\tPCS (TBI/SGMII/RTBI PHY interfaces): %s\n",
3796 (priv->dma_cap.pcs) ? "Y" : "N");
3797 seq_printf(seq, "\tSMA (MDIO) Interface: %s\n",
3798 (priv->dma_cap.sma_mdio) ? "Y" : "N");
3799 seq_printf(seq, "\tPMT Remote wake up: %s\n",
3800 (priv->dma_cap.pmt_remote_wake_up) ? "Y" : "N");
3801 seq_printf(seq, "\tPMT Magic Frame: %s\n",
3802 (priv->dma_cap.pmt_magic_frame) ? "Y" : "N");
3803 seq_printf(seq, "\tRMON module: %s\n",
3804 (priv->dma_cap.rmon) ? "Y" : "N");
3805 seq_printf(seq, "\tIEEE 1588-2002 Time Stamp: %s\n",
3806 (priv->dma_cap.time_stamp) ? "Y" : "N");
3807 seq_printf(seq, "\tIEEE 1588-2008 Advanced Time Stamp: %s\n",
3808 (priv->dma_cap.atime_stamp) ? "Y" : "N");
3809 seq_printf(seq, "\t802.3az - Energy-Efficient Ethernet (EEE): %s\n",
3810 (priv->dma_cap.eee) ? "Y" : "N");
3811 seq_printf(seq, "\tAV features: %s\n", (priv->dma_cap.av) ? "Y" : "N");
3812 seq_printf(seq, "\tChecksum Offload in TX: %s\n",
3813 (priv->dma_cap.tx_coe) ? "Y" : "N");
3814 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
3815 seq_printf(seq, "\tIP Checksum Offload in RX: %s\n",
3816 (priv->dma_cap.rx_coe) ? "Y" : "N");
3818 seq_printf(seq, "\tIP Checksum Offload (type1) in RX: %s\n",
3819 (priv->dma_cap.rx_coe_type1) ? "Y" : "N");
3820 seq_printf(seq, "\tIP Checksum Offload (type2) in RX: %s\n",
3821 (priv->dma_cap.rx_coe_type2) ? "Y" : "N");
3823 seq_printf(seq, "\tRXFIFO > 2048bytes: %s\n",
3824 (priv->dma_cap.rxfifo_over_2048) ? "Y" : "N");
3825 seq_printf(seq, "\tNumber of Additional RX channel: %d\n",
3826 priv->dma_cap.number_rx_channel);
3827 seq_printf(seq, "\tNumber of Additional TX channel: %d\n",
3828 priv->dma_cap.number_tx_channel);
3829 seq_printf(seq, "\tEnhanced descriptors: %s\n",
3830 (priv->dma_cap.enh_desc) ? "Y" : "N");
3835 static int stmmac_sysfs_dma_cap_open(struct inode *inode, struct file *file)
3837 return single_open(file, stmmac_sysfs_dma_cap_read, inode->i_private);
3840 static const struct file_operations stmmac_dma_cap_fops = {
3841 .owner = THIS_MODULE,
3842 .open = stmmac_sysfs_dma_cap_open,
3844 .llseek = seq_lseek,
3845 .release = single_release,
3848 static int stmmac_init_fs(struct net_device *dev)
3850 struct stmmac_priv *priv = netdev_priv(dev);
3852 /* Create per netdev entries */
3853 priv->dbgfs_dir = debugfs_create_dir(dev->name, stmmac_fs_dir);
3855 if (!priv->dbgfs_dir || IS_ERR(priv->dbgfs_dir)) {
3856 netdev_err(priv->dev, "ERROR failed to create debugfs directory\n");
3861 /* Entry to report DMA RX/TX rings */
3862 priv->dbgfs_rings_status =
3863 debugfs_create_file("descriptors_status", S_IRUGO,
3864 priv->dbgfs_dir, dev,
3865 &stmmac_rings_status_fops);
3867 if (!priv->dbgfs_rings_status || IS_ERR(priv->dbgfs_rings_status)) {
3868 netdev_err(priv->dev, "ERROR creating stmmac ring debugfs file\n");
3869 debugfs_remove_recursive(priv->dbgfs_dir);
3874 /* Entry to report the DMA HW features */
3875 priv->dbgfs_dma_cap = debugfs_create_file("dma_cap", S_IRUGO,
3877 dev, &stmmac_dma_cap_fops);
3879 if (!priv->dbgfs_dma_cap || IS_ERR(priv->dbgfs_dma_cap)) {
3880 netdev_err(priv->dev, "ERROR creating stmmac MMC debugfs file\n");
3881 debugfs_remove_recursive(priv->dbgfs_dir);
3889 static void stmmac_exit_fs(struct net_device *dev)
3891 struct stmmac_priv *priv = netdev_priv(dev);
3893 debugfs_remove_recursive(priv->dbgfs_dir);
3895 #endif /* CONFIG_DEBUG_FS */
3897 static const struct net_device_ops stmmac_netdev_ops = {
3898 .ndo_open = stmmac_open,
3899 .ndo_start_xmit = stmmac_xmit,
3900 .ndo_stop = stmmac_release,
3901 .ndo_change_mtu = stmmac_change_mtu,
3902 .ndo_fix_features = stmmac_fix_features,
3903 .ndo_set_features = stmmac_set_features,
3904 .ndo_set_rx_mode = stmmac_set_rx_mode,
3905 .ndo_tx_timeout = stmmac_tx_timeout,
3906 .ndo_do_ioctl = stmmac_ioctl,
3907 #ifdef CONFIG_NET_POLL_CONTROLLER
3908 .ndo_poll_controller = stmmac_poll_controller,
3910 .ndo_set_mac_address = eth_mac_addr,
3914 * stmmac_hw_init - Init the MAC device
3915 * @priv: driver private structure
3916 * Description: this function is to configure the MAC device according to
3917 * some platform parameters or the HW capability register. It prepares the
3918 * driver to use either ring or chain modes and to setup either enhanced or
3919 * normal descriptors.
3921 static int stmmac_hw_init(struct stmmac_priv *priv)
3923 struct mac_device_info *mac;
3925 /* Identify the MAC HW device */
3926 if (priv->plat->has_gmac) {
3927 priv->dev->priv_flags |= IFF_UNICAST_FLT;
3928 mac = dwmac1000_setup(priv->ioaddr,
3929 priv->plat->multicast_filter_bins,
3930 priv->plat->unicast_filter_entries,
3931 &priv->synopsys_id);
3932 } else if (priv->plat->has_gmac4) {
3933 priv->dev->priv_flags |= IFF_UNICAST_FLT;
3934 mac = dwmac4_setup(priv->ioaddr,
3935 priv->plat->multicast_filter_bins,
3936 priv->plat->unicast_filter_entries,
3937 &priv->synopsys_id);
3939 mac = dwmac100_setup(priv->ioaddr, &priv->synopsys_id);
3946 /* To use the chained or ring mode */
3947 if (priv->synopsys_id >= DWMAC_CORE_4_00) {
3948 priv->hw->mode = &dwmac4_ring_mode_ops;
3951 priv->hw->mode = &chain_mode_ops;
3952 dev_info(priv->device, "Chain mode enabled\n");
3953 priv->mode = STMMAC_CHAIN_MODE;
3955 priv->hw->mode = &ring_mode_ops;
3956 dev_info(priv->device, "Ring mode enabled\n");
3957 priv->mode = STMMAC_RING_MODE;
3961 /* Get the HW capability (new GMAC newer than 3.50a) */
3962 priv->hw_cap_support = stmmac_get_hw_features(priv);
3963 if (priv->hw_cap_support) {
3964 dev_info(priv->device, "DMA HW capability register supported\n");
3966 /* We can override some gmac/dma configuration fields: e.g.
3967 * enh_desc, tx_coe (e.g. that are passed through the
3968 * platform) with the values from the HW capability
3969 * register (if supported).
3971 priv->plat->enh_desc = priv->dma_cap.enh_desc;
3972 priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up;
3973 priv->hw->pmt = priv->plat->pmt;
3975 /* TXCOE doesn't work in thresh DMA mode */
3976 if (priv->plat->force_thresh_dma_mode)
3977 priv->plat->tx_coe = 0;
3979 priv->plat->tx_coe = priv->dma_cap.tx_coe;
3981 /* In case of GMAC4 rx_coe is from HW cap register. */
3982 priv->plat->rx_coe = priv->dma_cap.rx_coe;
3984 if (priv->dma_cap.rx_coe_type2)
3985 priv->plat->rx_coe = STMMAC_RX_COE_TYPE2;
3986 else if (priv->dma_cap.rx_coe_type1)
3987 priv->plat->rx_coe = STMMAC_RX_COE_TYPE1;
3990 dev_info(priv->device, "No HW DMA feature register supported\n");
3993 /* To use alternate (extended), normal or GMAC4 descriptor structures */
3994 if (priv->synopsys_id >= DWMAC_CORE_4_00)
3995 priv->hw->desc = &dwmac4_desc_ops;
3997 stmmac_selec_desc_mode(priv);
3999 if (priv->plat->rx_coe) {
4000 priv->hw->rx_csum = priv->plat->rx_coe;
4001 dev_info(priv->device, "RX Checksum Offload Engine supported\n");
4002 if (priv->synopsys_id < DWMAC_CORE_4_00)
4003 dev_info(priv->device, "COE Type %d\n", priv->hw->rx_csum);
4005 if (priv->plat->tx_coe)
4006 dev_info(priv->device, "TX Checksum insertion supported\n");
4008 if (priv->plat->pmt) {
4009 dev_info(priv->device, "Wake-Up On Lan supported\n");
4010 device_set_wakeup_capable(priv->device, 1);
4013 if (priv->dma_cap.tsoen)
4014 dev_info(priv->device, "TSO supported\n");
4021 * @device: device pointer
4022 * @plat_dat: platform data pointer
4023 * @res: stmmac resource pointer
4024 * Description: this is the main probe function used to
4025 * call the alloc_etherdev, allocate the priv structure.
4027 * returns 0 on success, otherwise errno.
4029 int stmmac_dvr_probe(struct device *device,
4030 struct plat_stmmacenet_data *plat_dat,
4031 struct stmmac_resources *res)
4033 struct net_device *ndev = NULL;
4034 struct stmmac_priv *priv;
4038 ndev = alloc_etherdev_mqs(sizeof(struct stmmac_priv),
4044 SET_NETDEV_DEV(ndev, device);
4046 priv = netdev_priv(ndev);
4047 priv->device = device;
4050 stmmac_set_ethtool_ops(ndev);
4051 priv->pause = pause;
4052 priv->plat = plat_dat;
4053 priv->ioaddr = res->addr;
4054 priv->dev->base_addr = (unsigned long)res->addr;
4056 priv->dev->irq = res->irq;
4057 priv->wol_irq = res->wol_irq;
4058 priv->lpi_irq = res->lpi_irq;
4061 memcpy(priv->dev->dev_addr, res->mac, ETH_ALEN);
4063 dev_set_drvdata(device, priv->dev);
4065 /* Verify driver arguments */
4066 stmmac_verify_args();
4068 /* Override with kernel parameters if supplied XXX CRS XXX
4069 * this needs to have multiple instances
4071 if ((phyaddr >= 0) && (phyaddr <= 31))
4072 priv->plat->phy_addr = phyaddr;
4074 if (priv->plat->stmmac_rst)
4075 reset_control_deassert(priv->plat->stmmac_rst);
4077 /* Init MAC and get the capabilities */
4078 ret = stmmac_hw_init(priv);
4082 /* Configure real RX and TX queues */
4083 ndev->real_num_rx_queues = priv->plat->rx_queues_to_use;
4084 ndev->real_num_tx_queues = priv->plat->tx_queues_to_use;
4086 priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
4088 ndev->netdev_ops = &stmmac_netdev_ops;
4090 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
4093 if ((priv->plat->tso_en) && (priv->dma_cap.tsoen)) {
4094 ndev->hw_features |= NETIF_F_TSO;
4096 dev_info(priv->device, "TSO feature enabled\n");
4098 ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
4099 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
4100 #ifdef STMMAC_VLAN_TAG_USED
4101 /* Both mac100 and gmac support receive VLAN tag detection */
4102 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX;
4104 priv->msg_enable = netif_msg_init(debug, default_msg_level);
4106 /* MTU range: 46 - hw-specific max */
4107 ndev->min_mtu = ETH_ZLEN - ETH_HLEN;
4108 if ((priv->plat->enh_desc) || (priv->synopsys_id >= DWMAC_CORE_4_00))
4109 ndev->max_mtu = JUMBO_LEN;
4111 ndev->max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + NET_IP_ALIGN);
4112 /* Will not overwrite ndev->max_mtu if plat->maxmtu > ndev->max_mtu
4113 * as well as plat->maxmtu < ndev->min_mtu which is a invalid range.
4115 if ((priv->plat->maxmtu < ndev->max_mtu) &&
4116 (priv->plat->maxmtu >= ndev->min_mtu))
4117 ndev->max_mtu = priv->plat->maxmtu;
4118 else if (priv->plat->maxmtu < ndev->min_mtu)
4119 dev_warn(priv->device,
4120 "%s: warning: maxmtu having invalid value (%d)\n",
4121 __func__, priv->plat->maxmtu);
4124 priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */
4126 /* Rx Watchdog is available in the COREs newer than the 3.40.
4127 * In some case, for example on bugged HW this feature
4128 * has to be disable and this can be done by passing the
4129 * riwt_off field from the platform.
4131 if ((priv->synopsys_id >= DWMAC_CORE_3_50) && (!priv->plat->riwt_off)) {
4133 dev_info(priv->device,
4134 "Enable RX Mitigation via HW Watchdog Timer\n");
4137 ret = alloc_dma_desc_resources(priv);
4139 netdev_err(priv->dev, "%s: DMA descriptors allocation failed\n",
4141 goto init_dma_error;
4144 ret = init_dma_desc_rings(priv->dev, GFP_KERNEL);
4146 netdev_err(priv->dev, "%s: DMA descriptors initialization failed\n",
4148 goto init_dma_error;
4151 for (queue = 0; queue < priv->plat->rx_queues_to_use; queue++) {
4152 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
4154 netif_napi_add(ndev, &rx_q->napi, stmmac_poll,
4155 (64 * priv->plat->rx_queues_to_use));
4158 spin_lock_init(&priv->lock);
4160 /* If a specific clk_csr value is passed from the platform
4161 * this means that the CSR Clock Range selection cannot be
4162 * changed at run-time and it is fixed. Viceversa the driver'll try to
4163 * set the MDC clock dynamically according to the csr actual
4166 if (!priv->plat->clk_csr)
4167 stmmac_clk_csr_set(priv);
4169 priv->clk_csr = priv->plat->clk_csr;
4171 stmmac_check_pcs_mode(priv);
4173 if (priv->hw->pcs != STMMAC_PCS_RGMII &&
4174 priv->hw->pcs != STMMAC_PCS_TBI &&
4175 priv->hw->pcs != STMMAC_PCS_RTBI) {
4176 /* MDIO bus Registration */
4177 ret = stmmac_mdio_register(ndev);
4179 dev_err(priv->device,
4180 "%s: MDIO bus (id: %d) registration failed",
4181 __func__, priv->plat->bus_id);
4182 goto error_mdio_register;
4186 ret = register_netdev(ndev);
4188 dev_err(priv->device, "%s: ERROR %i registering the device\n",
4190 goto error_netdev_register;
4195 error_netdev_register:
4196 if (priv->hw->pcs != STMMAC_PCS_RGMII &&
4197 priv->hw->pcs != STMMAC_PCS_TBI &&
4198 priv->hw->pcs != STMMAC_PCS_RTBI)
4199 stmmac_mdio_unregister(ndev);
4200 error_mdio_register:
4201 for (queue = 0; queue < priv->plat->rx_queues_to_use; queue++) {
4202 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
4204 netif_napi_del(&rx_q->napi);
4207 free_dma_desc_resources(priv);
4213 EXPORT_SYMBOL_GPL(stmmac_dvr_probe);
4217 * @dev: device pointer
4218 * Description: this function resets the TX/RX processes, disables the MAC RX/TX
4219 * changes the link status, releases the DMA descriptor rings.
4221 int stmmac_dvr_remove(struct device *dev)
4223 struct net_device *ndev = dev_get_drvdata(dev);
4224 struct stmmac_priv *priv = netdev_priv(ndev);
4226 netdev_info(priv->dev, "%s: removing driver", __func__);
4228 stmmac_stop_all_dma(priv);
4230 priv->hw->mac->set_mac(priv->ioaddr, false);
4231 netif_carrier_off(ndev);
4232 unregister_netdev(ndev);
4233 if (priv->plat->stmmac_rst)
4234 reset_control_assert(priv->plat->stmmac_rst);
4235 clk_disable_unprepare(priv->plat->pclk);
4236 clk_disable_unprepare(priv->plat->stmmac_clk);
4237 if (priv->hw->pcs != STMMAC_PCS_RGMII &&
4238 priv->hw->pcs != STMMAC_PCS_TBI &&
4239 priv->hw->pcs != STMMAC_PCS_RTBI)
4240 stmmac_mdio_unregister(ndev);
4245 EXPORT_SYMBOL_GPL(stmmac_dvr_remove);
4248 * stmmac_suspend - suspend callback
4249 * @dev: device pointer
4250 * Description: this is the function to suspend the device and it is called
4251 * by the platform driver to stop the network queue, release the resources,
4252 * program the PMT register (for WoL), clean and release driver resources.
4254 int stmmac_suspend(struct device *dev)
4256 struct net_device *ndev = dev_get_drvdata(dev);
4257 struct stmmac_priv *priv = netdev_priv(ndev);
4258 unsigned long flags;
4260 if (!ndev || !netif_running(ndev))
4264 phy_stop(ndev->phydev);
4266 spin_lock_irqsave(&priv->lock, flags);
4268 netif_device_detach(ndev);
4269 stmmac_stop_all_queues(priv);
4271 stmmac_disable_all_queues(priv);
4273 /* Stop TX/RX DMA */
4274 stmmac_stop_all_dma(priv);
4276 /* Enable Power down mode by programming the PMT regs */
4277 if (device_may_wakeup(priv->device)) {
4278 priv->hw->mac->pmt(priv->hw, priv->wolopts);
4281 priv->hw->mac->set_mac(priv->ioaddr, false);
4282 pinctrl_pm_select_sleep_state(priv->device);
4283 /* Disable clock in case of PWM is off */
4284 clk_disable(priv->plat->pclk);
4285 clk_disable(priv->plat->stmmac_clk);
4287 spin_unlock_irqrestore(&priv->lock, flags);
4290 priv->speed = SPEED_UNKNOWN;
4291 priv->oldduplex = DUPLEX_UNKNOWN;
4294 EXPORT_SYMBOL_GPL(stmmac_suspend);
4297 * stmmac_reset_queues_param - reset queue parameters
4298 * @dev: device pointer
4300 static void stmmac_reset_queues_param(struct stmmac_priv *priv)
4302 u32 rx_cnt = priv->plat->rx_queues_to_use;
4303 u32 tx_cnt = priv->plat->tx_queues_to_use;
4306 for (queue = 0; queue < rx_cnt; queue++) {
4307 struct stmmac_rx_queue *rx_q = &priv->rx_queue[queue];
4313 for (queue = 0; queue < tx_cnt; queue++) {
4314 struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue];
4322 * stmmac_resume - resume callback
4323 * @dev: device pointer
4324 * Description: when resume this function is invoked to setup the DMA and CORE
4325 * in a usable state.
4327 int stmmac_resume(struct device *dev)
4329 struct net_device *ndev = dev_get_drvdata(dev);
4330 struct stmmac_priv *priv = netdev_priv(ndev);
4331 unsigned long flags;
4333 if (!netif_running(ndev))
4336 /* Power Down bit, into the PM register, is cleared
4337 * automatically as soon as a magic packet or a Wake-up frame
4338 * is received. Anyway, it's better to manually clear
4339 * this bit because it can generate problems while resuming
4340 * from another devices (e.g. serial console).
4342 if (device_may_wakeup(priv->device)) {
4343 spin_lock_irqsave(&priv->lock, flags);
4344 priv->hw->mac->pmt(priv->hw, 0);
4345 spin_unlock_irqrestore(&priv->lock, flags);
4348 pinctrl_pm_select_default_state(priv->device);
4349 /* enable the clk previously disabled */
4350 clk_enable(priv->plat->stmmac_clk);
4351 clk_enable(priv->plat->pclk);
4352 /* reset the phy so that it's ready */
4354 stmmac_mdio_reset(priv->mii);
4357 netif_device_attach(ndev);
4359 spin_lock_irqsave(&priv->lock, flags);
4361 stmmac_reset_queues_param(priv);
4363 /* reset private mss value to force mss context settings at
4364 * next tso xmit (only used for gmac4).
4368 stmmac_clear_descriptors(priv);
4370 stmmac_hw_setup(ndev, false);
4371 stmmac_init_tx_coalesce(priv);
4372 stmmac_set_rx_mode(ndev);
4374 stmmac_enable_all_queues(priv);
4376 stmmac_start_all_queues(priv);
4378 spin_unlock_irqrestore(&priv->lock, flags);
4381 phy_start(ndev->phydev);
4385 EXPORT_SYMBOL_GPL(stmmac_resume);
4388 static int __init stmmac_cmdline_opt(char *str)
4394 while ((opt = strsep(&str, ",")) != NULL) {
4395 if (!strncmp(opt, "debug:", 6)) {
4396 if (kstrtoint(opt + 6, 0, &debug))
4398 } else if (!strncmp(opt, "phyaddr:", 8)) {
4399 if (kstrtoint(opt + 8, 0, &phyaddr))
4401 } else if (!strncmp(opt, "buf_sz:", 7)) {
4402 if (kstrtoint(opt + 7, 0, &buf_sz))
4404 } else if (!strncmp(opt, "tc:", 3)) {
4405 if (kstrtoint(opt + 3, 0, &tc))
4407 } else if (!strncmp(opt, "watchdog:", 9)) {
4408 if (kstrtoint(opt + 9, 0, &watchdog))
4410 } else if (!strncmp(opt, "flow_ctrl:", 10)) {
4411 if (kstrtoint(opt + 10, 0, &flow_ctrl))
4413 } else if (!strncmp(opt, "pause:", 6)) {
4414 if (kstrtoint(opt + 6, 0, &pause))
4416 } else if (!strncmp(opt, "eee_timer:", 10)) {
4417 if (kstrtoint(opt + 10, 0, &eee_timer))
4419 } else if (!strncmp(opt, "chain_mode:", 11)) {
4420 if (kstrtoint(opt + 11, 0, &chain_mode))
4427 pr_err("%s: ERROR broken module parameter conversion", __func__);
4431 __setup("stmmaceth=", stmmac_cmdline_opt);
4434 static int __init stmmac_init(void)
4436 #ifdef CONFIG_DEBUG_FS
4437 /* Create debugfs main directory if it doesn't exist yet */
4438 if (!stmmac_fs_dir) {
4439 stmmac_fs_dir = debugfs_create_dir(STMMAC_RESOURCE_NAME, NULL);
4441 if (!stmmac_fs_dir || IS_ERR(stmmac_fs_dir)) {
4442 pr_err("ERROR %s, debugfs create directory failed\n",
4443 STMMAC_RESOURCE_NAME);
4453 static void __exit stmmac_exit(void)
4455 #ifdef CONFIG_DEBUG_FS
4456 debugfs_remove_recursive(stmmac_fs_dir);
4460 module_init(stmmac_init)
4461 module_exit(stmmac_exit)
4463 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver");
4464 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
4465 MODULE_LICENSE("GPL");