1 // SPDX-License-Identifier: GPL-2.0
3 * Texas Instruments Ethernet Switch Driver
5 * Copyright (C) 2019 Texas Instruments
9 #include <linux/bpf_trace.h>
10 #include <linux/if_ether.h>
11 #include <linux/if_vlan.h>
12 #include <linux/kmemleak.h>
13 #include <linux/module.h>
14 #include <linux/netdevice.h>
15 #include <linux/net_tstamp.h>
17 #include <linux/phy.h>
18 #include <linux/platform_device.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/skbuff.h>
21 #include <net/page_pool.h>
22 #include <net/pkt_cls.h>
27 #include "cpsw_priv.h"
29 #include "davinci_cpdma.h"
31 #define CPTS_N_ETX_TS 4
33 int (*cpsw_slave_index)(struct cpsw_common *cpsw, struct cpsw_priv *priv);
35 void cpsw_intr_enable(struct cpsw_common *cpsw)
37 writel_relaxed(0xFF, &cpsw->wr_regs->tx_en);
38 writel_relaxed(0xFF, &cpsw->wr_regs->rx_en);
40 cpdma_ctlr_int_ctrl(cpsw->dma, true);
43 void cpsw_intr_disable(struct cpsw_common *cpsw)
45 writel_relaxed(0, &cpsw->wr_regs->tx_en);
46 writel_relaxed(0, &cpsw->wr_regs->rx_en);
48 cpdma_ctlr_int_ctrl(cpsw->dma, false);
51 void cpsw_tx_handler(void *token, int len, int status)
53 struct cpsw_meta_xdp *xmeta;
54 struct xdp_frame *xdpf;
55 struct net_device *ndev;
56 struct netdev_queue *txq;
60 if (cpsw_is_xdpf_handle(token)) {
61 xdpf = cpsw_handle_to_xdpf(token);
62 xmeta = (void *)xdpf + CPSW_XMETA_OFFSET;
65 xdp_return_frame(xdpf);
69 ch = skb_get_queue_mapping(skb);
70 cpts_tx_timestamp(ndev_to_cpsw(ndev)->cpts, skb);
71 dev_kfree_skb_any(skb);
74 /* Check whether the queue is stopped due to stalled tx dma, if the
75 * queue is stopped then start the queue as we have free desc for tx
77 txq = netdev_get_tx_queue(ndev, ch);
78 if (unlikely(netif_tx_queue_stopped(txq)))
79 netif_tx_wake_queue(txq);
81 ndev->stats.tx_packets++;
82 ndev->stats.tx_bytes += len;
85 irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id)
87 struct cpsw_common *cpsw = dev_id;
89 writel(0, &cpsw->wr_regs->tx_en);
90 cpdma_ctlr_eoi(cpsw->dma, CPDMA_EOI_TX);
92 if (cpsw->quirk_irq) {
93 disable_irq_nosync(cpsw->irqs_table[1]);
94 cpsw->tx_irq_disabled = true;
97 napi_schedule(&cpsw->napi_tx);
101 irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id)
103 struct cpsw_common *cpsw = dev_id;
105 writel(0, &cpsw->wr_regs->rx_en);
106 cpdma_ctlr_eoi(cpsw->dma, CPDMA_EOI_RX);
108 if (cpsw->quirk_irq) {
109 disable_irq_nosync(cpsw->irqs_table[0]);
110 cpsw->rx_irq_disabled = true;
113 napi_schedule(&cpsw->napi_rx);
117 irqreturn_t cpsw_misc_interrupt(int irq, void *dev_id)
119 struct cpsw_common *cpsw = dev_id;
121 writel(0, &cpsw->wr_regs->misc_en);
122 cpdma_ctlr_eoi(cpsw->dma, CPDMA_EOI_MISC);
123 cpts_misc_interrupt(cpsw->cpts);
124 writel(0x10, &cpsw->wr_regs->misc_en);
129 int cpsw_tx_mq_poll(struct napi_struct *napi_tx, int budget)
131 struct cpsw_common *cpsw = napi_to_cpsw(napi_tx);
132 int num_tx, cur_budget, ch;
134 struct cpsw_vector *txv;
136 /* process every unprocessed channel */
137 ch_map = cpdma_ctrl_txchs_state(cpsw->dma);
138 for (ch = 0, num_tx = 0; ch_map & 0xff; ch_map <<= 1, ch++) {
139 if (!(ch_map & 0x80))
142 txv = &cpsw->txv[ch];
143 if (unlikely(txv->budget > budget - num_tx))
144 cur_budget = budget - num_tx;
146 cur_budget = txv->budget;
148 num_tx += cpdma_chan_process(txv->ch, cur_budget);
149 if (num_tx >= budget)
153 if (num_tx < budget) {
154 napi_complete(napi_tx);
155 writel(0xff, &cpsw->wr_regs->tx_en);
161 int cpsw_tx_poll(struct napi_struct *napi_tx, int budget)
163 struct cpsw_common *cpsw = napi_to_cpsw(napi_tx);
166 num_tx = cpdma_chan_process(cpsw->txv[0].ch, budget);
167 if (num_tx < budget) {
168 napi_complete(napi_tx);
169 writel(0xff, &cpsw->wr_regs->tx_en);
170 if (cpsw->tx_irq_disabled) {
171 cpsw->tx_irq_disabled = false;
172 enable_irq(cpsw->irqs_table[1]);
179 int cpsw_rx_mq_poll(struct napi_struct *napi_rx, int budget)
181 struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
182 int num_rx, cur_budget, ch;
184 struct cpsw_vector *rxv;
186 /* process every unprocessed channel */
187 ch_map = cpdma_ctrl_rxchs_state(cpsw->dma);
188 for (ch = 0, num_rx = 0; ch_map; ch_map >>= 1, ch++) {
189 if (!(ch_map & 0x01))
192 rxv = &cpsw->rxv[ch];
193 if (unlikely(rxv->budget > budget - num_rx))
194 cur_budget = budget - num_rx;
196 cur_budget = rxv->budget;
198 num_rx += cpdma_chan_process(rxv->ch, cur_budget);
199 if (num_rx >= budget)
203 if (num_rx < budget) {
204 napi_complete_done(napi_rx, num_rx);
205 writel(0xff, &cpsw->wr_regs->rx_en);
211 int cpsw_rx_poll(struct napi_struct *napi_rx, int budget)
213 struct cpsw_common *cpsw = napi_to_cpsw(napi_rx);
216 num_rx = cpdma_chan_process(cpsw->rxv[0].ch, budget);
217 if (num_rx < budget) {
218 napi_complete_done(napi_rx, num_rx);
219 writel(0xff, &cpsw->wr_regs->rx_en);
220 if (cpsw->rx_irq_disabled) {
221 cpsw->rx_irq_disabled = false;
222 enable_irq(cpsw->irqs_table[0]);
229 void cpsw_rx_vlan_encap(struct sk_buff *skb)
231 struct cpsw_priv *priv = netdev_priv(skb->dev);
232 u32 rx_vlan_encap_hdr = *((u32 *)skb->data);
233 struct cpsw_common *cpsw = priv->cpsw;
234 u16 vtag, vid, prio, pkt_type;
236 /* Remove VLAN header encapsulation word */
237 skb_pull(skb, CPSW_RX_VLAN_ENCAP_HDR_SIZE);
239 pkt_type = (rx_vlan_encap_hdr >>
240 CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_SHIFT) &
241 CPSW_RX_VLAN_ENCAP_HDR_PKT_TYPE_MSK;
242 /* Ignore unknown & Priority-tagged packets*/
243 if (pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_RESERV ||
244 pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_PRIO_TAG)
247 vid = (rx_vlan_encap_hdr >>
248 CPSW_RX_VLAN_ENCAP_HDR_VID_SHIFT) &
250 /* Ignore vid 0 and pass packet as is */
254 /* Untag P0 packets if set for vlan */
255 if (!cpsw_ale_get_vlan_p0_untag(cpsw->ale, vid)) {
256 prio = (rx_vlan_encap_hdr >>
257 CPSW_RX_VLAN_ENCAP_HDR_PRIO_SHIFT) &
258 CPSW_RX_VLAN_ENCAP_HDR_PRIO_MSK;
260 vtag = (prio << VLAN_PRIO_SHIFT) | vid;
261 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vtag);
264 /* strip vlan tag for VLAN-tagged packet */
265 if (pkt_type == CPSW_RX_VLAN_ENCAP_HDR_PKT_VLAN_TAG) {
266 memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN);
267 skb_pull(skb, VLAN_HLEN);
271 void cpsw_set_slave_mac(struct cpsw_slave *slave, struct cpsw_priv *priv)
273 slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
274 slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
277 void soft_reset(const char *module, void __iomem *reg)
279 unsigned long timeout = jiffies + HZ;
281 writel_relaxed(1, reg);
284 } while ((readl_relaxed(reg) & 1) && time_after(timeout, jiffies));
286 WARN(readl_relaxed(reg) & 1, "failed to soft-reset %s\n", module);
289 void cpsw_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)
291 struct cpsw_priv *priv = netdev_priv(ndev);
292 struct cpsw_common *cpsw = priv->cpsw;
295 cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
296 ndev->stats.tx_errors++;
297 cpsw_intr_disable(cpsw);
298 for (ch = 0; ch < cpsw->tx_ch_num; ch++) {
299 cpdma_chan_stop(cpsw->txv[ch].ch);
300 cpdma_chan_start(cpsw->txv[ch].ch);
303 cpsw_intr_enable(cpsw);
304 netif_trans_update(ndev);
305 netif_tx_wake_all_queues(ndev);
308 static int cpsw_get_common_speed(struct cpsw_common *cpsw)
312 for (i = 0, speed = 0; i < cpsw->data.slaves; i++)
313 if (cpsw->slaves[i].phy && cpsw->slaves[i].phy->link)
314 speed += cpsw->slaves[i].phy->speed;
319 int cpsw_need_resplit(struct cpsw_common *cpsw)
324 /* re-split resources only in case speed was changed */
325 speed = cpsw_get_common_speed(cpsw);
326 if (speed == cpsw->speed || !speed)
331 for (i = 0, rlim_ch_num = 0; i < cpsw->tx_ch_num; i++) {
332 ch_rate = cpdma_chan_get_rate(cpsw->txv[i].ch);
339 /* cases not dependent on speed */
340 if (!rlim_ch_num || rlim_ch_num == cpsw->tx_ch_num)
346 void cpsw_split_res(struct cpsw_common *cpsw)
348 u32 consumed_rate = 0, bigest_rate = 0;
349 struct cpsw_vector *txv = cpsw->txv;
350 int i, ch_weight, rlim_ch_num = 0;
351 int budget, bigest_rate_ch = 0;
352 u32 ch_rate, max_rate;
355 for (i = 0; i < cpsw->tx_ch_num; i++) {
356 ch_rate = cpdma_chan_get_rate(txv[i].ch);
361 consumed_rate += ch_rate;
364 if (cpsw->tx_ch_num == rlim_ch_num) {
365 max_rate = consumed_rate;
366 } else if (!rlim_ch_num) {
367 ch_budget = CPSW_POLL_WEIGHT / cpsw->tx_ch_num;
369 max_rate = consumed_rate;
371 max_rate = cpsw->speed * 1000;
373 /* if max_rate is less then expected due to reduced link speed,
374 * split proportionally according next potential max speed
376 if (max_rate < consumed_rate)
379 if (max_rate < consumed_rate)
382 ch_budget = (consumed_rate * CPSW_POLL_WEIGHT) / max_rate;
383 ch_budget = (CPSW_POLL_WEIGHT - ch_budget) /
384 (cpsw->tx_ch_num - rlim_ch_num);
385 bigest_rate = (max_rate - consumed_rate) /
386 (cpsw->tx_ch_num - rlim_ch_num);
389 /* split tx weight/budget */
390 budget = CPSW_POLL_WEIGHT;
391 for (i = 0; i < cpsw->tx_ch_num; i++) {
392 ch_rate = cpdma_chan_get_rate(txv[i].ch);
394 txv[i].budget = (ch_rate * CPSW_POLL_WEIGHT) / max_rate;
397 if (ch_rate > bigest_rate) {
399 bigest_rate = ch_rate;
402 ch_weight = (ch_rate * 100) / max_rate;
405 cpdma_chan_set_weight(cpsw->txv[i].ch, ch_weight);
407 txv[i].budget = ch_budget;
410 cpdma_chan_set_weight(cpsw->txv[i].ch, 0);
413 budget -= txv[i].budget;
417 txv[bigest_rate_ch].budget += budget;
419 /* split rx budget */
420 budget = CPSW_POLL_WEIGHT;
421 ch_budget = budget / cpsw->rx_ch_num;
422 for (i = 0; i < cpsw->rx_ch_num; i++) {
423 cpsw->rxv[i].budget = ch_budget;
428 cpsw->rxv[0].budget += budget;
431 int cpsw_init_common(struct cpsw_common *cpsw, void __iomem *ss_regs,
432 int ale_ageout, phys_addr_t desc_mem_phys,
435 u32 slave_offset, sliver_offset, slave_size;
436 struct cpsw_ale_params ale_params;
437 struct cpsw_platform_data *data;
438 struct cpdma_params dma_params;
439 struct device *dev = cpsw->dev;
440 struct device_node *cpts_node;
441 void __iomem *cpts_regs;
448 cpsw->version = readl(&cpsw->regs->id_ver);
450 memset(&dma_params, 0, sizeof(dma_params));
451 memset(&ale_params, 0, sizeof(ale_params));
453 switch (cpsw->version) {
455 cpsw->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
456 cpts_regs = ss_regs + CPSW1_CPTS_OFFSET;
457 cpsw->hw_stats = ss_regs + CPSW1_HW_STATS;
458 dma_params.dmaregs = ss_regs + CPSW1_CPDMA_OFFSET;
459 dma_params.txhdp = ss_regs + CPSW1_STATERAM_OFFSET;
460 ale_params.ale_regs = ss_regs + CPSW1_ALE_OFFSET;
461 slave_offset = CPSW1_SLAVE_OFFSET;
462 slave_size = CPSW1_SLAVE_SIZE;
463 sliver_offset = CPSW1_SLIVER_OFFSET;
464 dma_params.desc_mem_phys = 0;
469 cpsw->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
470 cpts_regs = ss_regs + CPSW2_CPTS_OFFSET;
471 cpsw->hw_stats = ss_regs + CPSW2_HW_STATS;
472 dma_params.dmaregs = ss_regs + CPSW2_CPDMA_OFFSET;
473 dma_params.txhdp = ss_regs + CPSW2_STATERAM_OFFSET;
474 ale_params.ale_regs = ss_regs + CPSW2_ALE_OFFSET;
475 slave_offset = CPSW2_SLAVE_OFFSET;
476 slave_size = CPSW2_SLAVE_SIZE;
477 sliver_offset = CPSW2_SLIVER_OFFSET;
478 dma_params.desc_mem_phys = desc_mem_phys;
481 dev_err(dev, "unknown version 0x%08x\n", cpsw->version);
485 for (i = 0; i < cpsw->data.slaves; i++) {
486 struct cpsw_slave *slave = &cpsw->slaves[i];
487 void __iomem *regs = cpsw->regs;
489 slave->slave_num = i;
490 slave->data = &cpsw->data.slave_data[i];
491 slave->regs = regs + slave_offset;
492 slave->port_vlan = slave->data->dual_emac_res_vlan;
493 slave->mac_sl = cpsw_sl_get("cpsw", dev, regs + sliver_offset);
494 if (IS_ERR(slave->mac_sl))
495 return PTR_ERR(slave->mac_sl);
497 slave_offset += slave_size;
498 sliver_offset += SLIVER_SIZE;
501 ale_params.dev = dev;
502 ale_params.ale_ageout = ale_ageout;
503 ale_params.ale_ports = CPSW_ALE_PORTS_NUM;
504 ale_params.dev_id = "cpsw";
506 cpsw->ale = cpsw_ale_create(&ale_params);
507 if (IS_ERR(cpsw->ale)) {
508 dev_err(dev, "error initializing ale engine\n");
509 return PTR_ERR(cpsw->ale);
512 dma_params.dev = dev;
513 dma_params.rxthresh = dma_params.dmaregs + CPDMA_RXTHRESH;
514 dma_params.rxfree = dma_params.dmaregs + CPDMA_RXFREE;
515 dma_params.rxhdp = dma_params.txhdp + CPDMA_RXHDP;
516 dma_params.txcp = dma_params.txhdp + CPDMA_TXCP;
517 dma_params.rxcp = dma_params.txhdp + CPDMA_RXCP;
519 dma_params.num_chan = data->channels;
520 dma_params.has_soft_reset = true;
521 dma_params.min_packet_size = CPSW_MIN_PACKET_SIZE;
522 dma_params.desc_mem_size = data->bd_ram_size;
523 dma_params.desc_align = 16;
524 dma_params.has_ext_regs = true;
525 dma_params.desc_hw_addr = dma_params.desc_mem_phys;
526 dma_params.bus_freq_mhz = cpsw->bus_freq_mhz;
527 dma_params.descs_pool_size = descs_pool_size;
529 cpsw->dma = cpdma_ctlr_create(&dma_params);
531 dev_err(dev, "error initializing dma\n");
535 cpts_node = of_get_child_by_name(cpsw->dev->of_node, "cpts");
537 cpts_node = cpsw->dev->of_node;
539 cpsw->cpts = cpts_create(cpsw->dev, cpts_regs, cpts_node,
541 if (IS_ERR(cpsw->cpts)) {
542 ret = PTR_ERR(cpsw->cpts);
543 cpdma_ctlr_destroy(cpsw->dma);
545 of_node_put(cpts_node);
550 #if IS_ENABLED(CONFIG_TI_CPTS)
552 static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
554 struct cpsw_common *cpsw = priv->cpsw;
555 struct cpsw_slave *slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
558 if (!priv->tx_ts_enabled && !priv->rx_ts_enabled) {
559 slave_write(slave, 0, CPSW1_TS_CTL);
563 seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
564 ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
566 if (priv->tx_ts_enabled)
567 ts_en |= CPSW_V1_TS_TX_EN;
569 if (priv->rx_ts_enabled)
570 ts_en |= CPSW_V1_TS_RX_EN;
572 slave_write(slave, ts_en, CPSW1_TS_CTL);
573 slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
576 static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
578 struct cpsw_common *cpsw = priv->cpsw;
579 struct cpsw_slave *slave;
582 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
584 ctrl = slave_read(slave, CPSW2_CONTROL);
585 switch (cpsw->version) {
587 ctrl &= ~CTRL_V2_ALL_TS_MASK;
589 if (priv->tx_ts_enabled)
590 ctrl |= CTRL_V2_TX_TS_BITS;
592 if (priv->rx_ts_enabled)
593 ctrl |= CTRL_V2_RX_TS_BITS;
597 ctrl &= ~CTRL_V3_ALL_TS_MASK;
599 if (priv->tx_ts_enabled)
600 ctrl |= CTRL_V3_TX_TS_BITS;
602 if (priv->rx_ts_enabled)
603 ctrl |= CTRL_V3_RX_TS_BITS;
607 mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
609 slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
610 slave_write(slave, ctrl, CPSW2_CONTROL);
611 writel_relaxed(ETH_P_1588, &cpsw->regs->ts_ltype);
612 writel_relaxed(ETH_P_8021Q, &cpsw->regs->vlan_ltype);
615 static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
617 struct cpsw_priv *priv = netdev_priv(dev);
618 struct cpsw_common *cpsw = priv->cpsw;
619 struct hwtstamp_config cfg;
621 if (cpsw->version != CPSW_VERSION_1 &&
622 cpsw->version != CPSW_VERSION_2 &&
623 cpsw->version != CPSW_VERSION_3)
626 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
629 /* reserved for future extensions */
633 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
636 switch (cfg.rx_filter) {
637 case HWTSTAMP_FILTER_NONE:
638 priv->rx_ts_enabled = 0;
640 case HWTSTAMP_FILTER_ALL:
641 case HWTSTAMP_FILTER_NTP_ALL:
643 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
644 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
645 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
646 priv->rx_ts_enabled = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
647 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
649 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
650 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
651 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
652 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
653 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
654 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
655 case HWTSTAMP_FILTER_PTP_V2_EVENT:
656 case HWTSTAMP_FILTER_PTP_V2_SYNC:
657 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
658 priv->rx_ts_enabled = HWTSTAMP_FILTER_PTP_V2_EVENT;
659 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
665 priv->tx_ts_enabled = cfg.tx_type == HWTSTAMP_TX_ON;
667 switch (cpsw->version) {
669 cpsw_hwtstamp_v1(priv);
673 cpsw_hwtstamp_v2(priv);
679 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
682 static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
684 struct cpsw_common *cpsw = ndev_to_cpsw(dev);
685 struct cpsw_priv *priv = netdev_priv(dev);
686 struct hwtstamp_config cfg;
688 if (cpsw->version != CPSW_VERSION_1 &&
689 cpsw->version != CPSW_VERSION_2 &&
690 cpsw->version != CPSW_VERSION_3)
694 cfg.tx_type = priv->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
695 cfg.rx_filter = priv->rx_ts_enabled;
697 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
700 static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
705 static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
709 #endif /*CONFIG_TI_CPTS*/
711 int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
713 struct cpsw_priv *priv = netdev_priv(dev);
714 struct cpsw_common *cpsw = priv->cpsw;
715 int slave_no = cpsw_slave_index(cpsw, priv);
717 if (!netif_running(dev))
722 return cpsw_hwtstamp_set(dev, req);
724 return cpsw_hwtstamp_get(dev, req);
727 if (!cpsw->slaves[slave_no].phy)
729 return phy_mii_ioctl(cpsw->slaves[slave_no].phy, req, cmd);
732 int cpsw_ndo_set_tx_maxrate(struct net_device *ndev, int queue, u32 rate)
734 struct cpsw_priv *priv = netdev_priv(ndev);
735 struct cpsw_common *cpsw = priv->cpsw;
736 struct cpsw_slave *slave;
741 ch_rate = netdev_get_tx_queue(ndev, queue)->tx_maxrate;
745 ch_rate = rate * 1000;
746 min_rate = cpdma_chan_get_min_rate(cpsw->dma);
747 if ((ch_rate < min_rate && ch_rate)) {
748 dev_err(priv->dev, "The channel rate cannot be less than %dMbps",
753 if (rate > cpsw->speed) {
754 dev_err(priv->dev, "The channel rate cannot be more than 2Gbps");
758 ret = pm_runtime_get_sync(cpsw->dev);
760 pm_runtime_put_noidle(cpsw->dev);
764 ret = cpdma_chan_set_rate(cpsw->txv[queue].ch, ch_rate);
765 pm_runtime_put(cpsw->dev);
770 /* update rates for slaves tx queues */
771 for (i = 0; i < cpsw->data.slaves; i++) {
772 slave = &cpsw->slaves[i];
776 netdev_get_tx_queue(slave->ndev, queue)->tx_maxrate = rate;
779 cpsw_split_res(cpsw);
783 static int cpsw_tc_to_fifo(int tc, int num_tc)
785 if (tc == num_tc - 1)
788 return CPSW_FIFO_SHAPERS_NUM - tc;
791 bool cpsw_shp_is_off(struct cpsw_priv *priv)
793 struct cpsw_common *cpsw = priv->cpsw;
794 struct cpsw_slave *slave;
795 u32 shift, mask, val;
797 val = readl_relaxed(&cpsw->regs->ptype);
799 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
800 shift = CPSW_FIFO_SHAPE_EN_SHIFT + 3 * slave->slave_num;
807 static void cpsw_fifo_shp_on(struct cpsw_priv *priv, int fifo, int on)
809 struct cpsw_common *cpsw = priv->cpsw;
810 struct cpsw_slave *slave;
811 u32 shift, mask, val;
813 val = readl_relaxed(&cpsw->regs->ptype);
815 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
816 shift = CPSW_FIFO_SHAPE_EN_SHIFT + 3 * slave->slave_num;
817 mask = (1 << --fifo) << shift;
818 val = on ? val | mask : val & ~mask;
820 writel_relaxed(val, &cpsw->regs->ptype);
823 static int cpsw_set_fifo_bw(struct cpsw_priv *priv, int fifo, int bw)
825 struct cpsw_common *cpsw = priv->cpsw;
826 u32 val = 0, send_pct, shift;
827 struct cpsw_slave *slave;
830 if (bw > priv->shp_cfg_speed * 1000)
833 /* shaping has to stay enabled for highest fifos linearly
834 * and fifo bw no more then interface can allow
836 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
837 send_pct = slave_read(slave, SEND_PERCENT);
838 for (i = CPSW_FIFO_SHAPERS_NUM; i > 0; i--) {
840 if (i >= fifo || !priv->fifo_bw[i])
843 dev_warn(priv->dev, "Prev FIFO%d is shaped", i);
847 if (!priv->fifo_bw[i] && i > fifo) {
848 dev_err(priv->dev, "Upper FIFO%d is not shaped", i);
854 send_pct &= ~(CPSW_PCT_MASK << shift);
855 val = DIV_ROUND_UP(bw, priv->shp_cfg_speed * 10);
859 send_pct |= val << shift;
864 if (priv->fifo_bw[i])
865 pct += (send_pct >> shift) & CPSW_PCT_MASK;
871 slave_write(slave, send_pct, SEND_PERCENT);
872 priv->fifo_bw[fifo] = bw;
874 dev_warn(priv->dev, "set FIFO%d bw = %d\n", fifo,
875 DIV_ROUND_CLOSEST(val * priv->shp_cfg_speed, 100));
879 dev_err(priv->dev, "Bandwidth doesn't fit in tc configuration");
883 static int cpsw_set_fifo_rlimit(struct cpsw_priv *priv, int fifo, int bw)
885 struct cpsw_common *cpsw = priv->cpsw;
886 struct cpsw_slave *slave;
887 u32 tx_in_ctl_rg, val;
890 ret = cpsw_set_fifo_bw(priv, fifo, bw);
894 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
895 tx_in_ctl_rg = cpsw->version == CPSW_VERSION_1 ?
896 CPSW1_TX_IN_CTL : CPSW2_TX_IN_CTL;
899 cpsw_fifo_shp_on(priv, fifo, bw);
901 val = slave_read(slave, tx_in_ctl_rg);
902 if (cpsw_shp_is_off(priv)) {
903 /* disable FIFOs rate limited queues */
904 val &= ~(0xf << CPSW_FIFO_RATE_EN_SHIFT);
906 /* set type of FIFO queues to normal priority mode */
907 val &= ~(3 << CPSW_FIFO_QUEUE_TYPE_SHIFT);
909 /* set type of FIFO queues to be rate limited */
911 val |= 2 << CPSW_FIFO_QUEUE_TYPE_SHIFT;
913 priv->shp_cfg_speed = 0;
916 /* toggle a FIFO rate limited queue */
918 val |= BIT(fifo + CPSW_FIFO_RATE_EN_SHIFT);
920 val &= ~BIT(fifo + CPSW_FIFO_RATE_EN_SHIFT);
921 slave_write(slave, val, tx_in_ctl_rg);
923 /* FIFO transmit shape enable */
924 cpsw_fifo_shp_on(priv, fifo, bw);
931 * shaping for class A should be set first
933 static int cpsw_set_cbs(struct net_device *ndev,
934 struct tc_cbs_qopt_offload *qopt)
936 struct cpsw_priv *priv = netdev_priv(ndev);
937 struct cpsw_common *cpsw = priv->cpsw;
938 struct cpsw_slave *slave;
943 tc = netdev_txq_to_tc(priv->ndev, qopt->queue);
945 /* enable channels in backward order, as highest FIFOs must be rate
946 * limited first and for compliance with CPDMA rate limited channels
947 * that also used in bacward order. FIFO0 cannot be rate limited.
949 fifo = cpsw_tc_to_fifo(tc, ndev->num_tc);
951 dev_err(priv->dev, "Last tc%d can't be rate limited", tc);
955 /* do nothing, it's disabled anyway */
956 if (!qopt->enable && !priv->fifo_bw[fifo])
959 /* shapers can be set if link speed is known */
960 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
961 if (slave->phy && slave->phy->link) {
962 if (priv->shp_cfg_speed &&
963 priv->shp_cfg_speed != slave->phy->speed)
964 prev_speed = priv->shp_cfg_speed;
966 priv->shp_cfg_speed = slave->phy->speed;
969 if (!priv->shp_cfg_speed) {
970 dev_err(priv->dev, "Link speed is not known");
974 ret = pm_runtime_get_sync(cpsw->dev);
976 pm_runtime_put_noidle(cpsw->dev);
980 bw = qopt->enable ? qopt->idleslope : 0;
981 ret = cpsw_set_fifo_rlimit(priv, fifo, bw);
983 priv->shp_cfg_speed = prev_speed;
987 if (bw && prev_speed)
989 "Speed was changed, CBS shaper speeds are changed!");
991 pm_runtime_put_sync(cpsw->dev);
995 static int cpsw_set_mqprio(struct net_device *ndev, void *type_data)
997 struct tc_mqprio_qopt_offload *mqprio = type_data;
998 struct cpsw_priv *priv = netdev_priv(ndev);
999 struct cpsw_common *cpsw = priv->cpsw;
1000 int fifo, num_tc, count, offset;
1001 struct cpsw_slave *slave;
1002 u32 tx_prio_map = 0;
1005 num_tc = mqprio->qopt.num_tc;
1006 if (num_tc > CPSW_TC_NUM)
1009 if (mqprio->mode != TC_MQPRIO_MODE_DCB)
1012 ret = pm_runtime_get_sync(cpsw->dev);
1014 pm_runtime_put_noidle(cpsw->dev);
1019 for (i = 0; i < 8; i++) {
1020 tc = mqprio->qopt.prio_tc_map[i];
1021 fifo = cpsw_tc_to_fifo(tc, num_tc);
1022 tx_prio_map |= fifo << (4 * i);
1025 netdev_set_num_tc(ndev, num_tc);
1026 for (i = 0; i < num_tc; i++) {
1027 count = mqprio->qopt.count[i];
1028 offset = mqprio->qopt.offset[i];
1029 netdev_set_tc_queue(ndev, i, count, offset);
1033 if (!mqprio->qopt.hw) {
1034 /* restore default configuration */
1035 netdev_reset_tc(ndev);
1036 tx_prio_map = TX_PRIORITY_MAPPING;
1039 priv->mqprio_hw = mqprio->qopt.hw;
1041 offset = cpsw->version == CPSW_VERSION_1 ?
1042 CPSW1_TX_PRI_MAP : CPSW2_TX_PRI_MAP;
1044 slave = &cpsw->slaves[cpsw_slave_index(cpsw, priv)];
1045 slave_write(slave, tx_prio_map, offset);
1047 pm_runtime_put_sync(cpsw->dev);
1052 int cpsw_ndo_setup_tc(struct net_device *ndev, enum tc_setup_type type,
1056 case TC_SETUP_QDISC_CBS:
1057 return cpsw_set_cbs(ndev, type_data);
1059 case TC_SETUP_QDISC_MQPRIO:
1060 return cpsw_set_mqprio(ndev, type_data);
1067 void cpsw_cbs_resume(struct cpsw_slave *slave, struct cpsw_priv *priv)
1071 for (fifo = CPSW_FIFO_SHAPERS_NUM; fifo > 0; fifo--) {
1072 bw = priv->fifo_bw[fifo];
1076 cpsw_set_fifo_rlimit(priv, fifo, bw);
1080 void cpsw_mqprio_resume(struct cpsw_slave *slave, struct cpsw_priv *priv)
1082 struct cpsw_common *cpsw = priv->cpsw;
1083 u32 tx_prio_map = 0;
1087 if (!priv->mqprio_hw)
1090 for (i = 0; i < 8; i++) {
1091 tc = netdev_get_prio_tc_map(priv->ndev, i);
1092 fifo = CPSW_FIFO_SHAPERS_NUM - tc;
1093 tx_prio_map |= fifo << (4 * i);
1096 tx_prio_rg = cpsw->version == CPSW_VERSION_1 ?
1097 CPSW1_TX_PRI_MAP : CPSW2_TX_PRI_MAP;
1099 slave_write(slave, tx_prio_map, tx_prio_rg);
1102 int cpsw_fill_rx_channels(struct cpsw_priv *priv)
1104 struct cpsw_common *cpsw = priv->cpsw;
1105 struct cpsw_meta_xdp *xmeta;
1106 struct page_pool *pool;
1112 for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
1113 pool = cpsw->page_pool[ch];
1114 ch_buf_num = cpdma_chan_get_rx_buf_num(cpsw->rxv[ch].ch);
1115 for (i = 0; i < ch_buf_num; i++) {
1116 page = page_pool_dev_alloc_pages(pool);
1118 cpsw_err(priv, ifup, "allocate rx page err\n");
1122 xmeta = page_address(page) + CPSW_XMETA_OFFSET;
1123 xmeta->ndev = priv->ndev;
1126 dma = page_pool_get_dma_addr(page) + CPSW_HEADROOM;
1127 ret = cpdma_chan_idle_submit_mapped(cpsw->rxv[ch].ch,
1129 cpsw->rx_packet_max,
1132 cpsw_err(priv, ifup,
1133 "cannot submit page to channel %d rx, error %d\n",
1135 page_pool_recycle_direct(pool, page);
1140 cpsw_info(priv, ifup, "ch %d rx, submitted %d descriptors\n",
1147 static struct page_pool *cpsw_create_page_pool(struct cpsw_common *cpsw,
1150 struct page_pool_params pp_params;
1151 struct page_pool *pool;
1153 pp_params.order = 0;
1154 pp_params.flags = PP_FLAG_DMA_MAP;
1155 pp_params.pool_size = size;
1156 pp_params.nid = NUMA_NO_NODE;
1157 pp_params.dma_dir = DMA_BIDIRECTIONAL;
1158 pp_params.dev = cpsw->dev;
1160 pool = page_pool_create(&pp_params);
1162 dev_err(cpsw->dev, "cannot create rx page pool\n");
1167 static int cpsw_create_rx_pool(struct cpsw_common *cpsw, int ch)
1169 struct page_pool *pool;
1170 int ret = 0, pool_size;
1172 pool_size = cpdma_chan_get_rx_buf_num(cpsw->rxv[ch].ch);
1173 pool = cpsw_create_page_pool(cpsw, pool_size);
1175 ret = PTR_ERR(pool);
1177 cpsw->page_pool[ch] = pool;
1182 static int cpsw_ndev_create_xdp_rxq(struct cpsw_priv *priv, int ch)
1184 struct cpsw_common *cpsw = priv->cpsw;
1185 struct xdp_rxq_info *rxq;
1186 struct page_pool *pool;
1189 pool = cpsw->page_pool[ch];
1190 rxq = &priv->xdp_rxq[ch];
1192 ret = xdp_rxq_info_reg(rxq, priv->ndev, ch);
1196 ret = xdp_rxq_info_reg_mem_model(rxq, MEM_TYPE_PAGE_POOL, pool);
1198 xdp_rxq_info_unreg(rxq);
1203 static void cpsw_ndev_destroy_xdp_rxq(struct cpsw_priv *priv, int ch)
1205 struct xdp_rxq_info *rxq = &priv->xdp_rxq[ch];
1207 if (!xdp_rxq_info_is_reg(rxq))
1210 xdp_rxq_info_unreg(rxq);
1213 void cpsw_destroy_xdp_rxqs(struct cpsw_common *cpsw)
1215 struct net_device *ndev;
1218 for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
1219 for (i = 0; i < cpsw->data.slaves; i++) {
1220 ndev = cpsw->slaves[i].ndev;
1224 cpsw_ndev_destroy_xdp_rxq(netdev_priv(ndev), ch);
1227 page_pool_destroy(cpsw->page_pool[ch]);
1228 cpsw->page_pool[ch] = NULL;
1232 int cpsw_create_xdp_rxqs(struct cpsw_common *cpsw)
1234 struct net_device *ndev;
1237 for (ch = 0; ch < cpsw->rx_ch_num; ch++) {
1238 ret = cpsw_create_rx_pool(cpsw, ch);
1242 /* using same page pool is allowed as no running rx handlers
1243 * simultaneously for both ndevs
1245 for (i = 0; i < cpsw->data.slaves; i++) {
1246 ndev = cpsw->slaves[i].ndev;
1250 ret = cpsw_ndev_create_xdp_rxq(netdev_priv(ndev), ch);
1259 cpsw_destroy_xdp_rxqs(cpsw);
1264 static int cpsw_xdp_prog_setup(struct cpsw_priv *priv, struct netdev_bpf *bpf)
1266 struct bpf_prog *prog = bpf->prog;
1268 if (!priv->xdpi.prog && !prog)
1271 if (!xdp_attachment_flags_ok(&priv->xdpi, bpf))
1274 WRITE_ONCE(priv->xdp_prog, prog);
1276 xdp_attachment_setup(&priv->xdpi, bpf);
1281 int cpsw_ndo_bpf(struct net_device *ndev, struct netdev_bpf *bpf)
1283 struct cpsw_priv *priv = netdev_priv(ndev);
1285 switch (bpf->command) {
1286 case XDP_SETUP_PROG:
1287 return cpsw_xdp_prog_setup(priv, bpf);
1294 int cpsw_xdp_tx_frame(struct cpsw_priv *priv, struct xdp_frame *xdpf,
1295 struct page *page, int port)
1297 struct cpsw_common *cpsw = priv->cpsw;
1298 struct cpsw_meta_xdp *xmeta;
1299 struct cpdma_chan *txch;
1303 xmeta = (void *)xdpf + CPSW_XMETA_OFFSET;
1304 xmeta->ndev = priv->ndev;
1306 txch = cpsw->txv[0].ch;
1309 dma = page_pool_get_dma_addr(page);
1310 dma += xdpf->headroom + sizeof(struct xdp_frame);
1311 ret = cpdma_chan_submit_mapped(txch, cpsw_xdpf_to_handle(xdpf),
1312 dma, xdpf->len, port);
1314 if (sizeof(*xmeta) > xdpf->headroom) {
1315 xdp_return_frame_rx_napi(xdpf);
1319 ret = cpdma_chan_submit(txch, cpsw_xdpf_to_handle(xdpf),
1320 xdpf->data, xdpf->len, port);
1324 priv->ndev->stats.tx_dropped++;
1325 xdp_return_frame_rx_napi(xdpf);
1331 int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp,
1332 struct page *page, int port)
1334 struct cpsw_common *cpsw = priv->cpsw;
1335 struct net_device *ndev = priv->ndev;
1336 int ret = CPSW_XDP_CONSUMED;
1337 struct xdp_frame *xdpf;
1338 struct bpf_prog *prog;
1343 prog = READ_ONCE(priv->xdp_prog);
1345 ret = CPSW_XDP_PASS;
1349 act = bpf_prog_run_xdp(prog, xdp);
1352 ret = CPSW_XDP_PASS;
1355 xdpf = xdp_convert_buff_to_frame(xdp);
1356 if (unlikely(!xdpf))
1359 cpsw_xdp_tx_frame(priv, xdpf, page, port);
1362 if (xdp_do_redirect(ndev, xdp, prog))
1365 /* Have to flush here, per packet, instead of doing it in bulk
1366 * at the end of the napi handler. The RX devices on this
1367 * particular hardware is sharing a common queue, so the
1368 * incoming device might change per packet.
1373 bpf_warn_invalid_xdp_action(act);
1376 trace_xdp_exception(ndev, prog, act);
1377 fallthrough; /* handle aborts by dropping packet */
1386 page_pool_recycle_direct(cpsw->page_pool[ch], page);