1 // SPDX-License-Identifier: GPL-2.0
2 /* Renesas Ethernet Switch device driver
4 * Copyright (C) 2022 Renesas Electronics Corporation
8 #include <linux/dma-mapping.h>
10 #include <linux/etherdevice.h>
11 #include <linux/iopoll.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/net_tstamp.h>
16 #include <linux/of_mdio.h>
17 #include <linux/of_net.h>
18 #include <linux/phy/phy.h>
19 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/slab.h>
24 #include <linux/spinlock.h>
25 #include <linux/sys_soc.h>
29 static int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected)
33 return readl_poll_timeout_atomic(addr + offs, val, (val & mask) == expected,
34 1, RSWITCH_TIMEOUT_US);
37 static void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set)
39 iowrite32((ioread32(addr + reg) & ~clear) | set, addr + reg);
42 /* Common Agent block (COMA) */
43 static void rswitch_reset(struct rswitch_private *priv)
45 iowrite32(RRC_RR, priv->addr + RRC);
46 iowrite32(RRC_RR_CLR, priv->addr + RRC);
49 static void rswitch_clock_enable(struct rswitch_private *priv)
51 iowrite32(RCEC_ACE_DEFAULT | RCEC_RCE, priv->addr + RCEC);
54 static void rswitch_clock_disable(struct rswitch_private *priv)
56 iowrite32(RCDC_RCD, priv->addr + RCDC);
59 static bool rswitch_agent_clock_is_enabled(void __iomem *coma_addr, int port)
61 u32 val = ioread32(coma_addr + RCEC);
64 return (val & BIT(port)) ? true : false;
69 static void rswitch_agent_clock_ctrl(void __iomem *coma_addr, int port, int enable)
74 val = ioread32(coma_addr + RCEC);
75 iowrite32(val | RCEC_RCE | BIT(port), coma_addr + RCEC);
77 val = ioread32(coma_addr + RCDC);
78 iowrite32(val | BIT(port), coma_addr + RCDC);
82 static int rswitch_bpool_config(struct rswitch_private *priv)
86 val = ioread32(priv->addr + CABPIRM);
87 if (val & CABPIRM_BPR)
90 iowrite32(CABPIRM_BPIOG, priv->addr + CABPIRM);
92 return rswitch_reg_wait(priv->addr, CABPIRM, CABPIRM_BPR, CABPIRM_BPR);
95 static void rswitch_coma_init(struct rswitch_private *priv)
97 iowrite32(CABPPFLC_INIT_VALUE, priv->addr + CABPPFLC0);
100 /* R-Switch-2 block (TOP) */
101 static void rswitch_top_init(struct rswitch_private *priv)
105 for (i = 0; i < RSWITCH_MAX_NUM_QUEUES; i++)
106 iowrite32((i / 16) << (GWCA_INDEX * 8), priv->addr + TPEMIMC7(i));
109 /* Forwarding engine block (MFWD) */
110 static void rswitch_fwd_init(struct rswitch_private *priv)
115 for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
116 iowrite32(FWPC0_DEFAULT, priv->addr + FWPC0(i));
117 iowrite32(0, priv->addr + FWPBFC(i));
120 for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
121 iowrite32(priv->rdev[i]->rx_queue->index,
122 priv->addr + FWPBFCSDC(GWCA_INDEX, i));
123 iowrite32(BIT(priv->gwca.index), priv->addr + FWPBFC(i));
127 iowrite32(FWPC0_DEFAULT, priv->addr + FWPC0(priv->gwca.index));
128 iowrite32(FWPC1_DDE, priv->addr + FWPC1(priv->gwca.index));
129 iowrite32(0, priv->addr + FWPBFC(priv->gwca.index));
130 iowrite32(GENMASK(RSWITCH_NUM_PORTS - 1, 0), priv->addr + FWPBFC(priv->gwca.index));
133 /* Gateway CPU agent block (GWCA) */
134 static int rswitch_gwca_change_mode(struct rswitch_private *priv,
135 enum rswitch_gwca_mode mode)
139 if (!rswitch_agent_clock_is_enabled(priv->addr, priv->gwca.index))
140 rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 1);
142 iowrite32(mode, priv->addr + GWMC);
144 ret = rswitch_reg_wait(priv->addr, GWMS, GWMS_OPS_MASK, mode);
146 if (mode == GWMC_OPC_DISABLE)
147 rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 0);
152 static int rswitch_gwca_mcast_table_reset(struct rswitch_private *priv)
154 iowrite32(GWMTIRM_MTIOG, priv->addr + GWMTIRM);
156 return rswitch_reg_wait(priv->addr, GWMTIRM, GWMTIRM_MTR, GWMTIRM_MTR);
159 static int rswitch_gwca_axi_ram_reset(struct rswitch_private *priv)
161 iowrite32(GWARIRM_ARIOG, priv->addr + GWARIRM);
163 return rswitch_reg_wait(priv->addr, GWARIRM, GWARIRM_ARR, GWARIRM_ARR);
166 static bool rswitch_is_any_data_irq(struct rswitch_private *priv, u32 *dis, bool tx)
168 u32 *mask = tx ? priv->gwca.tx_irq_bits : priv->gwca.rx_irq_bits;
171 for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) {
172 if (dis[i] & mask[i])
179 static void rswitch_get_data_irq_status(struct rswitch_private *priv, u32 *dis)
183 for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) {
184 dis[i] = ioread32(priv->addr + GWDIS(i));
185 dis[i] &= ioread32(priv->addr + GWDIE(i));
189 static void rswitch_enadis_data_irq(struct rswitch_private *priv, int index, bool enable)
191 u32 offs = enable ? GWDIE(index / 32) : GWDID(index / 32);
193 iowrite32(BIT(index % 32), priv->addr + offs);
196 static void rswitch_ack_data_irq(struct rswitch_private *priv, int index)
198 u32 offs = GWDIS(index / 32);
200 iowrite32(BIT(index % 32), priv->addr + offs);
203 static int rswitch_next_queue_index(struct rswitch_gwca_queue *gq, bool cur, int num)
205 int index = cur ? gq->cur : gq->dirty;
207 if (index + num >= gq->ring_size)
208 index = (index + num) % gq->ring_size;
215 static int rswitch_get_num_cur_queues(struct rswitch_gwca_queue *gq)
217 if (gq->cur >= gq->dirty)
218 return gq->cur - gq->dirty;
220 return gq->ring_size - gq->dirty + gq->cur;
223 static bool rswitch_is_queue_rxed(struct rswitch_gwca_queue *gq)
225 struct rswitch_ext_ts_desc *desc = &gq->rx_ring[gq->dirty];
227 if ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY)
233 static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq,
234 int start_index, int num)
238 for (i = 0; i < num; i++) {
239 index = (i + start_index) % gq->ring_size;
242 gq->skbs[index] = netdev_alloc_skb_ip_align(gq->ndev,
243 PKT_BUF_SZ + RSWITCH_ALIGN - 1);
244 if (!gq->skbs[index])
251 for (i--; i >= 0; i--) {
252 index = (i + start_index) % gq->ring_size;
253 dev_kfree_skb(gq->skbs[index]);
254 gq->skbs[index] = NULL;
260 static void rswitch_gwca_queue_free(struct net_device *ndev,
261 struct rswitch_gwca_queue *gq)
266 dma_free_coherent(ndev->dev.parent,
267 sizeof(struct rswitch_ext_ts_desc) *
268 (gq->ring_size + 1), gq->rx_ring, gq->ring_dma);
271 for (i = 0; i < gq->ring_size; i++)
272 dev_kfree_skb(gq->skbs[i]);
274 dma_free_coherent(ndev->dev.parent,
275 sizeof(struct rswitch_ext_desc) *
276 (gq->ring_size + 1), gq->tx_ring, gq->ring_dma);
284 static void rswitch_gwca_ts_queue_free(struct rswitch_private *priv)
286 struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue;
288 dma_free_coherent(&priv->pdev->dev,
289 sizeof(struct rswitch_ts_desc) * (gq->ring_size + 1),
290 gq->ts_ring, gq->ring_dma);
294 static int rswitch_gwca_queue_alloc(struct net_device *ndev,
295 struct rswitch_private *priv,
296 struct rswitch_gwca_queue *gq,
297 bool dir_tx, int ring_size)
302 gq->ring_size = ring_size;
305 gq->skbs = kcalloc(gq->ring_size, sizeof(*gq->skbs), GFP_KERNEL);
310 rswitch_gwca_queue_alloc_skb(gq, 0, gq->ring_size);
312 gq->rx_ring = dma_alloc_coherent(ndev->dev.parent,
313 sizeof(struct rswitch_ext_ts_desc) *
314 (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL);
316 gq->tx_ring = dma_alloc_coherent(ndev->dev.parent,
317 sizeof(struct rswitch_ext_desc) *
318 (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL);
321 if (!gq->rx_ring && !gq->tx_ring)
325 bit = BIT(gq->index % 32);
327 priv->gwca.tx_irq_bits[i] |= bit;
329 priv->gwca.rx_irq_bits[i] |= bit;
334 rswitch_gwca_queue_free(ndev, gq);
339 static void rswitch_desc_set_dptr(struct rswitch_desc *desc, dma_addr_t addr)
341 desc->dptrl = cpu_to_le32(lower_32_bits(addr));
342 desc->dptrh = upper_32_bits(addr) & 0xff;
345 static dma_addr_t rswitch_desc_get_dptr(const struct rswitch_desc *desc)
347 return __le32_to_cpu(desc->dptrl) | (u64)(desc->dptrh) << 32;
350 static int rswitch_gwca_queue_format(struct net_device *ndev,
351 struct rswitch_private *priv,
352 struct rswitch_gwca_queue *gq)
354 int ring_size = sizeof(struct rswitch_ext_desc) * gq->ring_size;
355 struct rswitch_ext_desc *desc;
356 struct rswitch_desc *linkfix;
360 memset(gq->tx_ring, 0, ring_size);
361 for (i = 0, desc = gq->tx_ring; i < gq->ring_size; i++, desc++) {
363 dma_addr = dma_map_single(ndev->dev.parent,
364 gq->skbs[i]->data, PKT_BUF_SZ,
366 if (dma_mapping_error(ndev->dev.parent, dma_addr))
369 desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ);
370 rswitch_desc_set_dptr(&desc->desc, dma_addr);
371 desc->desc.die_dt = DT_FEMPTY | DIE;
373 desc->desc.die_dt = DT_EEMPTY | DIE;
376 rswitch_desc_set_dptr(&desc->desc, gq->ring_dma);
377 desc->desc.die_dt = DT_LINKFIX;
379 linkfix = &priv->gwca.linkfix_table[gq->index];
380 linkfix->die_dt = DT_LINKFIX;
381 rswitch_desc_set_dptr(linkfix, gq->ring_dma);
383 iowrite32(GWDCC_BALR | (gq->dir_tx ? GWDCC_DCP(GWCA_IPV_NUM) | GWDCC_DQT : 0) | GWDCC_EDE,
384 priv->addr + GWDCC_OFFS(gq->index));
390 for (i--, desc = gq->tx_ring; i >= 0; i--, desc++) {
391 dma_addr = rswitch_desc_get_dptr(&desc->desc);
392 dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ,
400 static void rswitch_gwca_ts_queue_fill(struct rswitch_private *priv,
401 int start_index, int num)
403 struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue;
404 struct rswitch_ts_desc *desc;
407 for (i = 0; i < num; i++) {
408 index = (i + start_index) % gq->ring_size;
409 desc = &gq->ts_ring[index];
410 desc->desc.die_dt = DT_FEMPTY_ND | DIE;
414 static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
415 struct rswitch_gwca_queue *gq,
416 int start_index, int num)
418 struct rswitch_device *rdev = netdev_priv(ndev);
419 struct rswitch_ext_ts_desc *desc;
423 for (i = 0; i < num; i++) {
424 index = (i + start_index) % gq->ring_size;
425 desc = &gq->rx_ring[index];
427 dma_addr = dma_map_single(ndev->dev.parent,
428 gq->skbs[index]->data, PKT_BUF_SZ,
430 if (dma_mapping_error(ndev->dev.parent, dma_addr))
433 desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ);
434 rswitch_desc_set_dptr(&desc->desc, dma_addr);
436 desc->desc.die_dt = DT_FEMPTY | DIE;
437 desc->info1 = cpu_to_le64(INFO1_SPN(rdev->etha->index));
439 desc->desc.die_dt = DT_EEMPTY | DIE;
447 for (i--; i >= 0; i--) {
448 index = (i + start_index) % gq->ring_size;
449 desc = &gq->rx_ring[index];
450 dma_addr = rswitch_desc_get_dptr(&desc->desc);
451 dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ,
459 static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev,
460 struct rswitch_private *priv,
461 struct rswitch_gwca_queue *gq)
463 int ring_size = sizeof(struct rswitch_ext_ts_desc) * gq->ring_size;
464 struct rswitch_ext_ts_desc *desc;
465 struct rswitch_desc *linkfix;
468 memset(gq->rx_ring, 0, ring_size);
469 err = rswitch_gwca_queue_ext_ts_fill(ndev, gq, 0, gq->ring_size);
473 desc = &gq->rx_ring[gq->ring_size]; /* Last */
474 rswitch_desc_set_dptr(&desc->desc, gq->ring_dma);
475 desc->desc.die_dt = DT_LINKFIX;
477 linkfix = &priv->gwca.linkfix_table[gq->index];
478 linkfix->die_dt = DT_LINKFIX;
479 rswitch_desc_set_dptr(linkfix, gq->ring_dma);
481 iowrite32(GWDCC_BALR | (gq->dir_tx ? GWDCC_DCP(GWCA_IPV_NUM) | GWDCC_DQT : 0) |
482 GWDCC_ETS | GWDCC_EDE,
483 priv->addr + GWDCC_OFFS(gq->index));
488 static int rswitch_gwca_linkfix_alloc(struct rswitch_private *priv)
490 int i, num_queues = priv->gwca.num_queues;
491 struct rswitch_gwca *gwca = &priv->gwca;
492 struct device *dev = &priv->pdev->dev;
494 gwca->linkfix_table_size = sizeof(struct rswitch_desc) * num_queues;
495 gwca->linkfix_table = dma_alloc_coherent(dev, gwca->linkfix_table_size,
496 &gwca->linkfix_table_dma, GFP_KERNEL);
497 if (!gwca->linkfix_table)
499 for (i = 0; i < num_queues; i++)
500 gwca->linkfix_table[i].die_dt = DT_EOS;
505 static void rswitch_gwca_linkfix_free(struct rswitch_private *priv)
507 struct rswitch_gwca *gwca = &priv->gwca;
509 if (gwca->linkfix_table)
510 dma_free_coherent(&priv->pdev->dev, gwca->linkfix_table_size,
511 gwca->linkfix_table, gwca->linkfix_table_dma);
512 gwca->linkfix_table = NULL;
515 static int rswitch_gwca_ts_queue_alloc(struct rswitch_private *priv)
517 struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue;
518 struct rswitch_ts_desc *desc;
520 gq->ring_size = TS_RING_SIZE;
521 gq->ts_ring = dma_alloc_coherent(&priv->pdev->dev,
522 sizeof(struct rswitch_ts_desc) *
523 (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL);
528 rswitch_gwca_ts_queue_fill(priv, 0, TS_RING_SIZE);
529 desc = &gq->ts_ring[gq->ring_size];
530 desc->desc.die_dt = DT_LINKFIX;
531 rswitch_desc_set_dptr(&desc->desc, gq->ring_dma);
532 INIT_LIST_HEAD(&priv->gwca.ts_info_list);
537 static struct rswitch_gwca_queue *rswitch_gwca_get(struct rswitch_private *priv)
539 struct rswitch_gwca_queue *gq;
542 index = find_first_zero_bit(priv->gwca.used, priv->gwca.num_queues);
543 if (index >= priv->gwca.num_queues)
545 set_bit(index, priv->gwca.used);
546 gq = &priv->gwca.queues[index];
547 memset(gq, 0, sizeof(*gq));
553 static void rswitch_gwca_put(struct rswitch_private *priv,
554 struct rswitch_gwca_queue *gq)
556 clear_bit(gq->index, priv->gwca.used);
559 static int rswitch_txdmac_alloc(struct net_device *ndev)
561 struct rswitch_device *rdev = netdev_priv(ndev);
562 struct rswitch_private *priv = rdev->priv;
565 rdev->tx_queue = rswitch_gwca_get(priv);
569 err = rswitch_gwca_queue_alloc(ndev, priv, rdev->tx_queue, true, TX_RING_SIZE);
571 rswitch_gwca_put(priv, rdev->tx_queue);
578 static void rswitch_txdmac_free(struct net_device *ndev)
580 struct rswitch_device *rdev = netdev_priv(ndev);
582 rswitch_gwca_queue_free(ndev, rdev->tx_queue);
583 rswitch_gwca_put(rdev->priv, rdev->tx_queue);
586 static int rswitch_txdmac_init(struct rswitch_private *priv, int index)
588 struct rswitch_device *rdev = priv->rdev[index];
590 return rswitch_gwca_queue_format(rdev->ndev, priv, rdev->tx_queue);
593 static int rswitch_rxdmac_alloc(struct net_device *ndev)
595 struct rswitch_device *rdev = netdev_priv(ndev);
596 struct rswitch_private *priv = rdev->priv;
599 rdev->rx_queue = rswitch_gwca_get(priv);
603 err = rswitch_gwca_queue_alloc(ndev, priv, rdev->rx_queue, false, RX_RING_SIZE);
605 rswitch_gwca_put(priv, rdev->rx_queue);
612 static void rswitch_rxdmac_free(struct net_device *ndev)
614 struct rswitch_device *rdev = netdev_priv(ndev);
616 rswitch_gwca_queue_free(ndev, rdev->rx_queue);
617 rswitch_gwca_put(rdev->priv, rdev->rx_queue);
620 static int rswitch_rxdmac_init(struct rswitch_private *priv, int index)
622 struct rswitch_device *rdev = priv->rdev[index];
623 struct net_device *ndev = rdev->ndev;
625 return rswitch_gwca_queue_ext_ts_format(ndev, priv, rdev->rx_queue);
628 static int rswitch_gwca_hw_init(struct rswitch_private *priv)
632 err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
635 err = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG);
639 err = rswitch_gwca_mcast_table_reset(priv);
642 err = rswitch_gwca_axi_ram_reset(priv);
646 iowrite32(GWVCC_VEM_SC_TAG, priv->addr + GWVCC);
647 iowrite32(0, priv->addr + GWTTFC);
648 iowrite32(lower_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC1);
649 iowrite32(upper_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC0);
650 iowrite32(lower_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC10);
651 iowrite32(upper_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC00);
652 iowrite32(GWCA_TS_IRQ_BIT, priv->addr + GWTSDCC0);
654 iowrite32(GWTPC_PPPL(GWCA_IPV_NUM), priv->addr + GWTPC0);
656 for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
657 err = rswitch_rxdmac_init(priv, i);
660 err = rswitch_txdmac_init(priv, i);
665 err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
668 return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION);
671 static int rswitch_gwca_hw_deinit(struct rswitch_private *priv)
675 err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
678 err = rswitch_gwca_change_mode(priv, GWMC_OPC_RESET);
682 return rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
685 static int rswitch_gwca_halt(struct rswitch_private *priv)
689 priv->gwca_halt = true;
690 err = rswitch_gwca_hw_deinit(priv);
691 dev_err(&priv->pdev->dev, "halted (%d)\n", err);
696 static bool rswitch_rx(struct net_device *ndev, int *quota)
698 struct rswitch_device *rdev = netdev_priv(ndev);
699 struct rswitch_gwca_queue *gq = rdev->rx_queue;
700 struct rswitch_ext_ts_desc *desc;
701 int limit, boguscnt, num, ret;
710 boguscnt = min_t(int, gq->ring_size, *quota);
713 desc = &gq->rx_ring[gq->cur];
714 while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY) {
716 pkt_len = le16_to_cpu(desc->desc.info_ds) & RX_DS;
717 skb = gq->skbs[gq->cur];
718 gq->skbs[gq->cur] = NULL;
719 dma_addr = rswitch_desc_get_dptr(&desc->desc);
720 dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, DMA_FROM_DEVICE);
721 get_ts = rdev->priv->ptp_priv->tstamp_rx_ctrl & RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT;
723 struct skb_shared_hwtstamps *shhwtstamps;
724 struct timespec64 ts;
726 shhwtstamps = skb_hwtstamps(skb);
727 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
728 ts.tv_sec = __le32_to_cpu(desc->ts_sec);
729 ts.tv_nsec = __le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff));
730 shhwtstamps->hwtstamp = timespec64_to_ktime(ts);
732 skb_put(skb, pkt_len);
733 skb->protocol = eth_type_trans(skb, ndev);
734 napi_gro_receive(&rdev->napi, skb);
735 rdev->ndev->stats.rx_packets++;
736 rdev->ndev->stats.rx_bytes += pkt_len;
738 gq->cur = rswitch_next_queue_index(gq, true, 1);
739 desc = &gq->rx_ring[gq->cur];
745 num = rswitch_get_num_cur_queues(gq);
746 ret = rswitch_gwca_queue_alloc_skb(gq, gq->dirty, num);
749 ret = rswitch_gwca_queue_ext_ts_fill(ndev, gq, gq->dirty, num);
752 gq->dirty = rswitch_next_queue_index(gq, false, num);
754 *quota -= limit - boguscnt;
756 return boguscnt <= 0;
759 rswitch_gwca_halt(rdev->priv);
764 static int rswitch_tx_free(struct net_device *ndev, bool free_txed_only)
766 struct rswitch_device *rdev = netdev_priv(ndev);
767 struct rswitch_gwca_queue *gq = rdev->tx_queue;
768 struct rswitch_ext_desc *desc;
774 for (; rswitch_get_num_cur_queues(gq) > 0;
775 gq->dirty = rswitch_next_queue_index(gq, false, 1)) {
776 desc = &gq->tx_ring[gq->dirty];
777 if (free_txed_only && (desc->desc.die_dt & DT_MASK) != DT_FEMPTY)
781 size = le16_to_cpu(desc->desc.info_ds) & TX_DS;
782 skb = gq->skbs[gq->dirty];
784 dma_addr = rswitch_desc_get_dptr(&desc->desc);
785 dma_unmap_single(ndev->dev.parent, dma_addr,
786 size, DMA_TO_DEVICE);
787 dev_kfree_skb_any(gq->skbs[gq->dirty]);
788 gq->skbs[gq->dirty] = NULL;
791 desc->desc.die_dt = DT_EEMPTY;
792 rdev->ndev->stats.tx_packets++;
793 rdev->ndev->stats.tx_bytes += size;
799 static int rswitch_poll(struct napi_struct *napi, int budget)
801 struct net_device *ndev = napi->dev;
802 struct rswitch_private *priv;
803 struct rswitch_device *rdev;
807 rdev = netdev_priv(ndev);
811 rswitch_tx_free(ndev, true);
813 if (rswitch_rx(ndev, "a))
815 else if (rdev->priv->gwca_halt)
817 else if (rswitch_is_queue_rxed(rdev->rx_queue))
820 netif_wake_subqueue(ndev, 0);
822 if (napi_complete_done(napi, budget - quota)) {
823 spin_lock_irqsave(&priv->lock, flags);
824 rswitch_enadis_data_irq(priv, rdev->tx_queue->index, true);
825 rswitch_enadis_data_irq(priv, rdev->rx_queue->index, true);
826 spin_unlock_irqrestore(&priv->lock, flags);
830 return budget - quota;
838 static void rswitch_queue_interrupt(struct net_device *ndev)
840 struct rswitch_device *rdev = netdev_priv(ndev);
842 if (napi_schedule_prep(&rdev->napi)) {
843 spin_lock(&rdev->priv->lock);
844 rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false);
845 rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false);
846 spin_unlock(&rdev->priv->lock);
847 __napi_schedule(&rdev->napi);
851 static irqreturn_t rswitch_data_irq(struct rswitch_private *priv, u32 *dis)
853 struct rswitch_gwca_queue *gq;
856 for (i = 0; i < priv->gwca.num_queues; i++) {
857 gq = &priv->gwca.queues[i];
858 index = gq->index / 32;
859 bit = BIT(gq->index % 32);
860 if (!(dis[index] & bit))
863 rswitch_ack_data_irq(priv, gq->index);
864 rswitch_queue_interrupt(gq->ndev);
870 static irqreturn_t rswitch_gwca_irq(int irq, void *dev_id)
872 struct rswitch_private *priv = dev_id;
873 u32 dis[RSWITCH_NUM_IRQ_REGS];
874 irqreturn_t ret = IRQ_NONE;
876 rswitch_get_data_irq_status(priv, dis);
878 if (rswitch_is_any_data_irq(priv, dis, true) ||
879 rswitch_is_any_data_irq(priv, dis, false))
880 ret = rswitch_data_irq(priv, dis);
885 static int rswitch_gwca_request_irqs(struct rswitch_private *priv)
887 char *resource_name, *irq_name;
890 for (i = 0; i < GWCA_NUM_IRQS; i++) {
891 resource_name = kasprintf(GFP_KERNEL, GWCA_IRQ_RESOURCE_NAME, i);
895 irq = platform_get_irq_byname(priv->pdev, resource_name);
896 kfree(resource_name);
900 irq_name = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL,
905 ret = devm_request_irq(&priv->pdev->dev, irq, rswitch_gwca_irq,
914 static void rswitch_ts(struct rswitch_private *priv)
916 struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue;
917 struct rswitch_gwca_ts_info *ts_info, *ts_info2;
918 struct skb_shared_hwtstamps shhwtstamps;
919 struct rswitch_ts_desc *desc;
920 struct timespec64 ts;
924 desc = &gq->ts_ring[gq->cur];
925 while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY_ND) {
928 port = TS_DESC_DPN(__le32_to_cpu(desc->desc.dptrl));
929 tag = TS_DESC_TSUN(__le32_to_cpu(desc->desc.dptrl));
931 list_for_each_entry_safe(ts_info, ts_info2, &priv->gwca.ts_info_list, list) {
932 if (!(ts_info->port == port && ts_info->tag == tag))
935 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
936 ts.tv_sec = __le32_to_cpu(desc->ts_sec);
937 ts.tv_nsec = __le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff));
938 shhwtstamps.hwtstamp = timespec64_to_ktime(ts);
939 skb_tstamp_tx(ts_info->skb, &shhwtstamps);
940 dev_consume_skb_irq(ts_info->skb);
941 list_del(&ts_info->list);
946 gq->cur = rswitch_next_queue_index(gq, true, 1);
947 desc = &gq->ts_ring[gq->cur];
950 num = rswitch_get_num_cur_queues(gq);
951 rswitch_gwca_ts_queue_fill(priv, gq->dirty, num);
952 gq->dirty = rswitch_next_queue_index(gq, false, num);
955 static irqreturn_t rswitch_gwca_ts_irq(int irq, void *dev_id)
957 struct rswitch_private *priv = dev_id;
959 if (ioread32(priv->addr + GWTSDIS) & GWCA_TS_IRQ_BIT) {
960 iowrite32(GWCA_TS_IRQ_BIT, priv->addr + GWTSDIS);
969 static int rswitch_gwca_ts_request_irqs(struct rswitch_private *priv)
973 irq = platform_get_irq_byname(priv->pdev, GWCA_TS_IRQ_RESOURCE_NAME);
977 return devm_request_irq(&priv->pdev->dev, irq, rswitch_gwca_ts_irq,
978 0, GWCA_TS_IRQ_NAME, priv);
981 /* Ethernet TSN Agent block (ETHA) and Ethernet MAC IP block (RMAC) */
982 static int rswitch_etha_change_mode(struct rswitch_etha *etha,
983 enum rswitch_etha_mode mode)
987 if (!rswitch_agent_clock_is_enabled(etha->coma_addr, etha->index))
988 rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 1);
990 iowrite32(mode, etha->addr + EAMC);
992 ret = rswitch_reg_wait(etha->addr, EAMS, EAMS_OPS_MASK, mode);
994 if (mode == EAMC_OPC_DISABLE)
995 rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 0);
1000 static void rswitch_etha_read_mac_address(struct rswitch_etha *etha)
1002 u32 mrmac0 = ioread32(etha->addr + MRMAC0);
1003 u32 mrmac1 = ioread32(etha->addr + MRMAC1);
1004 u8 *mac = ða->mac_addr[0];
1006 mac[0] = (mrmac0 >> 8) & 0xFF;
1007 mac[1] = (mrmac0 >> 0) & 0xFF;
1008 mac[2] = (mrmac1 >> 24) & 0xFF;
1009 mac[3] = (mrmac1 >> 16) & 0xFF;
1010 mac[4] = (mrmac1 >> 8) & 0xFF;
1011 mac[5] = (mrmac1 >> 0) & 0xFF;
1014 static void rswitch_etha_write_mac_address(struct rswitch_etha *etha, const u8 *mac)
1016 iowrite32((mac[0] << 8) | mac[1], etha->addr + MRMAC0);
1017 iowrite32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
1018 etha->addr + MRMAC1);
1021 static int rswitch_etha_wait_link_verification(struct rswitch_etha *etha)
1023 iowrite32(MLVC_PLV, etha->addr + MLVC);
1025 return rswitch_reg_wait(etha->addr, MLVC, MLVC_PLV, 0);
1028 static void rswitch_rmac_setting(struct rswitch_etha *etha, const u8 *mac)
1032 rswitch_etha_write_mac_address(etha, mac);
1034 switch (etha->speed) {
1036 val = MPIC_LSC_100M;
1042 val = MPIC_LSC_2_5G;
1048 iowrite32(MPIC_PIS_GMII | val, etha->addr + MPIC);
1051 static void rswitch_etha_enable_mii(struct rswitch_etha *etha)
1053 rswitch_modify(etha->addr, MPIC, MPIC_PSMCS_MASK | MPIC_PSMHT_MASK,
1054 MPIC_PSMCS(etha->psmcs) | MPIC_PSMHT(0x06));
1055 rswitch_modify(etha->addr, MPSM, 0, MPSM_MFF_C45);
1058 static int rswitch_etha_hw_init(struct rswitch_etha *etha, const u8 *mac)
1062 err = rswitch_etha_change_mode(etha, EAMC_OPC_DISABLE);
1065 err = rswitch_etha_change_mode(etha, EAMC_OPC_CONFIG);
1069 iowrite32(EAVCC_VEM_SC_TAG, etha->addr + EAVCC);
1070 rswitch_rmac_setting(etha, mac);
1071 rswitch_etha_enable_mii(etha);
1073 err = rswitch_etha_wait_link_verification(etha);
1077 err = rswitch_etha_change_mode(etha, EAMC_OPC_DISABLE);
1081 return rswitch_etha_change_mode(etha, EAMC_OPC_OPERATION);
1084 static int rswitch_etha_set_access(struct rswitch_etha *etha, bool read,
1085 int phyad, int devad, int regad, int data)
1087 int pop = read ? MDIO_READ_C45 : MDIO_WRITE_C45;
1091 if (devad == 0xffffffff)
1094 writel(MMIS1_CLEAR_FLAGS, etha->addr + MMIS1);
1096 val = MPSM_PSME | MPSM_MFF_C45;
1097 iowrite32((regad << 16) | (devad << 8) | (phyad << 3) | val, etha->addr + MPSM);
1099 ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PAACS, MMIS1_PAACS);
1103 rswitch_modify(etha->addr, MMIS1, MMIS1_PAACS, MMIS1_PAACS);
1106 writel((pop << 13) | (devad << 8) | (phyad << 3) | val, etha->addr + MPSM);
1108 ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PRACS, MMIS1_PRACS);
1112 ret = (ioread32(etha->addr + MPSM) & MPSM_PRD_MASK) >> 16;
1114 rswitch_modify(etha->addr, MMIS1, MMIS1_PRACS, MMIS1_PRACS);
1116 iowrite32((data << 16) | (pop << 13) | (devad << 8) | (phyad << 3) | val,
1119 ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PWACS, MMIS1_PWACS);
1125 static int rswitch_etha_mii_read_c45(struct mii_bus *bus, int addr, int devad,
1128 struct rswitch_etha *etha = bus->priv;
1130 return rswitch_etha_set_access(etha, true, addr, devad, regad, 0);
1133 static int rswitch_etha_mii_write_c45(struct mii_bus *bus, int addr, int devad,
1136 struct rswitch_etha *etha = bus->priv;
1138 return rswitch_etha_set_access(etha, false, addr, devad, regad, val);
1141 /* Call of_node_put(port) after done */
1142 static struct device_node *rswitch_get_port_node(struct rswitch_device *rdev)
1144 struct device_node *ports, *port;
1148 ports = of_get_child_by_name(rdev->ndev->dev.parent->of_node,
1153 for_each_child_of_node(ports, port) {
1154 err = of_property_read_u32(port, "reg", &index);
1159 if (index == rdev->etha->index) {
1160 if (!of_device_is_available(port))
1172 static int rswitch_etha_get_params(struct rswitch_device *rdev)
1178 return 0; /* ignored */
1180 err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface);
1184 err = of_property_read_u32(rdev->np_port, "max-speed", &max_speed);
1186 rdev->etha->speed = max_speed;
1190 /* if no "max-speed" property, let's use default speed */
1191 switch (rdev->etha->phy_interface) {
1192 case PHY_INTERFACE_MODE_MII:
1193 rdev->etha->speed = SPEED_100;
1195 case PHY_INTERFACE_MODE_SGMII:
1196 rdev->etha->speed = SPEED_1000;
1198 case PHY_INTERFACE_MODE_USXGMII:
1199 rdev->etha->speed = SPEED_2500;
1208 static int rswitch_mii_register(struct rswitch_device *rdev)
1210 struct device_node *mdio_np;
1211 struct mii_bus *mii_bus;
1214 mii_bus = mdiobus_alloc();
1218 mii_bus->name = "rswitch_mii";
1219 sprintf(mii_bus->id, "etha%d", rdev->etha->index);
1220 mii_bus->priv = rdev->etha;
1221 mii_bus->read_c45 = rswitch_etha_mii_read_c45;
1222 mii_bus->write_c45 = rswitch_etha_mii_write_c45;
1223 mii_bus->parent = &rdev->priv->pdev->dev;
1225 mdio_np = of_get_child_by_name(rdev->np_port, "mdio");
1226 err = of_mdiobus_register(mii_bus, mdio_np);
1228 mdiobus_free(mii_bus);
1232 rdev->etha->mii = mii_bus;
1235 of_node_put(mdio_np);
1240 static void rswitch_mii_unregister(struct rswitch_device *rdev)
1242 if (rdev->etha->mii) {
1243 mdiobus_unregister(rdev->etha->mii);
1244 mdiobus_free(rdev->etha->mii);
1245 rdev->etha->mii = NULL;
1249 static void rswitch_adjust_link(struct net_device *ndev)
1251 struct rswitch_device *rdev = netdev_priv(ndev);
1252 struct phy_device *phydev = ndev->phydev;
1254 if (phydev->link != rdev->etha->link) {
1255 phy_print_status(phydev);
1257 phy_power_on(rdev->serdes);
1258 else if (rdev->serdes->power_count)
1259 phy_power_off(rdev->serdes);
1261 rdev->etha->link = phydev->link;
1263 if (!rdev->priv->etha_no_runtime_change &&
1264 phydev->speed != rdev->etha->speed) {
1265 rdev->etha->speed = phydev->speed;
1267 rswitch_etha_hw_init(rdev->etha, rdev->ndev->dev_addr);
1268 phy_set_speed(rdev->serdes, rdev->etha->speed);
1273 static void rswitch_phy_remove_link_mode(struct rswitch_device *rdev,
1274 struct phy_device *phydev)
1276 if (!rdev->priv->etha_no_runtime_change)
1279 switch (rdev->etha->speed) {
1281 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
1282 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT);
1285 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
1286 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT);
1289 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
1290 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT);
1296 phy_set_max_speed(phydev, rdev->etha->speed);
1299 static int rswitch_phy_device_init(struct rswitch_device *rdev)
1301 struct phy_device *phydev;
1302 struct device_node *phy;
1308 phy = of_parse_phandle(rdev->np_port, "phy-handle", 0);
1312 /* Set phydev->host_interfaces before calling of_phy_connect() to
1313 * configure the PHY with the information of host_interfaces.
1315 phydev = of_phy_find_device(phy);
1318 __set_bit(rdev->etha->phy_interface, phydev->host_interfaces);
1319 phydev->mac_managed_pm = true;
1321 phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
1322 rdev->etha->phy_interface);
1326 phy_set_max_speed(phydev, SPEED_2500);
1327 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
1328 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
1329 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
1330 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1331 rswitch_phy_remove_link_mode(rdev, phydev);
1333 phy_attached_info(phydev);
1342 static void rswitch_phy_device_deinit(struct rswitch_device *rdev)
1344 if (rdev->ndev->phydev)
1345 phy_disconnect(rdev->ndev->phydev);
1348 static int rswitch_serdes_set_params(struct rswitch_device *rdev)
1352 err = phy_set_mode_ext(rdev->serdes, PHY_MODE_ETHERNET,
1353 rdev->etha->phy_interface);
1357 return phy_set_speed(rdev->serdes, rdev->etha->speed);
1360 static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
1364 if (!rdev->etha->operated) {
1365 err = rswitch_etha_hw_init(rdev->etha, rdev->ndev->dev_addr);
1368 if (rdev->priv->etha_no_runtime_change)
1369 rdev->etha->operated = true;
1372 err = rswitch_mii_register(rdev);
1376 err = rswitch_phy_device_init(rdev);
1378 goto err_phy_device_init;
1380 rdev->serdes = devm_of_phy_get(&rdev->priv->pdev->dev, rdev->np_port, NULL);
1381 if (IS_ERR(rdev->serdes)) {
1382 err = PTR_ERR(rdev->serdes);
1383 goto err_serdes_phy_get;
1386 err = rswitch_serdes_set_params(rdev);
1388 goto err_serdes_set_params;
1392 err_serdes_set_params:
1394 rswitch_phy_device_deinit(rdev);
1396 err_phy_device_init:
1397 rswitch_mii_unregister(rdev);
1402 static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev)
1404 rswitch_phy_device_deinit(rdev);
1405 rswitch_mii_unregister(rdev);
1408 static int rswitch_ether_port_init_all(struct rswitch_private *priv)
1413 rswitch_for_each_enabled_port(priv, i) {
1414 err = rswitch_ether_port_init_one(priv->rdev[i]);
1419 rswitch_for_each_enabled_port(priv, i) {
1420 err = phy_init(priv->rdev[i]->serdes);
1428 rswitch_for_each_enabled_port_continue_reverse(priv, i)
1429 phy_exit(priv->rdev[i]->serdes);
1430 i = RSWITCH_NUM_PORTS;
1433 rswitch_for_each_enabled_port_continue_reverse(priv, i)
1434 rswitch_ether_port_deinit_one(priv->rdev[i]);
1439 static void rswitch_ether_port_deinit_all(struct rswitch_private *priv)
1443 for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
1444 phy_exit(priv->rdev[i]->serdes);
1445 rswitch_ether_port_deinit_one(priv->rdev[i]);
1449 static int rswitch_open(struct net_device *ndev)
1451 struct rswitch_device *rdev = netdev_priv(ndev);
1452 unsigned long flags;
1454 phy_start(ndev->phydev);
1456 napi_enable(&rdev->napi);
1457 netif_start_queue(ndev);
1459 spin_lock_irqsave(&rdev->priv->lock, flags);
1460 rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, true);
1461 rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, true);
1462 spin_unlock_irqrestore(&rdev->priv->lock, flags);
1464 if (bitmap_empty(rdev->priv->opened_ports, RSWITCH_NUM_PORTS))
1465 iowrite32(GWCA_TS_IRQ_BIT, rdev->priv->addr + GWTSDIE);
1467 bitmap_set(rdev->priv->opened_ports, rdev->port, 1);
1472 static int rswitch_stop(struct net_device *ndev)
1474 struct rswitch_device *rdev = netdev_priv(ndev);
1475 struct rswitch_gwca_ts_info *ts_info, *ts_info2;
1476 unsigned long flags;
1478 netif_tx_stop_all_queues(ndev);
1479 bitmap_clear(rdev->priv->opened_ports, rdev->port, 1);
1481 if (bitmap_empty(rdev->priv->opened_ports, RSWITCH_NUM_PORTS))
1482 iowrite32(GWCA_TS_IRQ_BIT, rdev->priv->addr + GWTSDID);
1484 list_for_each_entry_safe(ts_info, ts_info2, &rdev->priv->gwca.ts_info_list, list) {
1485 if (ts_info->port != rdev->port)
1487 dev_kfree_skb_irq(ts_info->skb);
1488 list_del(&ts_info->list);
1492 spin_lock_irqsave(&rdev->priv->lock, flags);
1493 rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false);
1494 rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false);
1495 spin_unlock_irqrestore(&rdev->priv->lock, flags);
1497 phy_stop(ndev->phydev);
1498 napi_disable(&rdev->napi);
1503 static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1505 struct rswitch_device *rdev = netdev_priv(ndev);
1506 struct rswitch_gwca_queue *gq = rdev->tx_queue;
1507 netdev_tx_t ret = NETDEV_TX_OK;
1508 struct rswitch_ext_desc *desc;
1509 dma_addr_t dma_addr;
1511 if (rswitch_get_num_cur_queues(gq) >= gq->ring_size - 1) {
1512 netif_stop_subqueue(ndev, 0);
1513 return NETDEV_TX_BUSY;
1516 if (skb_put_padto(skb, ETH_ZLEN))
1519 dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len, DMA_TO_DEVICE);
1520 if (dma_mapping_error(ndev->dev.parent, dma_addr)) {
1521 dev_kfree_skb_any(skb);
1525 gq->skbs[gq->cur] = skb;
1526 desc = &gq->tx_ring[gq->cur];
1527 rswitch_desc_set_dptr(&desc->desc, dma_addr);
1528 desc->desc.info_ds = cpu_to_le16(skb->len);
1530 desc->info1 = cpu_to_le64(INFO1_DV(BIT(rdev->etha->index)) |
1531 INFO1_IPV(GWCA_IPV_NUM) | INFO1_FMT);
1532 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
1533 struct rswitch_gwca_ts_info *ts_info;
1535 ts_info = kzalloc(sizeof(*ts_info), GFP_ATOMIC);
1537 dma_unmap_single(ndev->dev.parent, dma_addr, skb->len, DMA_TO_DEVICE);
1541 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1543 desc->info1 |= cpu_to_le64(INFO1_TSUN(rdev->ts_tag) | INFO1_TXC);
1545 ts_info->skb = skb_get(skb);
1546 ts_info->port = rdev->port;
1547 ts_info->tag = rdev->ts_tag;
1548 list_add_tail(&ts_info->list, &rdev->priv->gwca.ts_info_list);
1550 skb_tx_timestamp(skb);
1555 desc->desc.die_dt = DT_FSINGLE | DIE;
1556 wmb(); /* gq->cur must be incremented after die_dt was set */
1558 gq->cur = rswitch_next_queue_index(gq, true, 1);
1559 rswitch_modify(rdev->addr, GWTRC(gq->index), 0, BIT(gq->index % 32));
1564 static struct net_device_stats *rswitch_get_stats(struct net_device *ndev)
1566 return &ndev->stats;
1569 static int rswitch_hwstamp_get(struct net_device *ndev, struct ifreq *req)
1571 struct rswitch_device *rdev = netdev_priv(ndev);
1572 struct rcar_gen4_ptp_private *ptp_priv;
1573 struct hwtstamp_config config;
1575 ptp_priv = rdev->priv->ptp_priv;
1578 config.tx_type = ptp_priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON :
1580 switch (ptp_priv->tstamp_rx_ctrl & RCAR_GEN4_RXTSTAMP_TYPE) {
1581 case RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT:
1582 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
1584 case RCAR_GEN4_RXTSTAMP_TYPE_ALL:
1585 config.rx_filter = HWTSTAMP_FILTER_ALL;
1588 config.rx_filter = HWTSTAMP_FILTER_NONE;
1592 return copy_to_user(req->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;
1595 static int rswitch_hwstamp_set(struct net_device *ndev, struct ifreq *req)
1597 struct rswitch_device *rdev = netdev_priv(ndev);
1598 u32 tstamp_rx_ctrl = RCAR_GEN4_RXTSTAMP_ENABLED;
1599 struct hwtstamp_config config;
1602 if (copy_from_user(&config, req->ifr_data, sizeof(config)))
1608 switch (config.tx_type) {
1609 case HWTSTAMP_TX_OFF:
1612 case HWTSTAMP_TX_ON:
1613 tstamp_tx_ctrl = RCAR_GEN4_TXTSTAMP_ENABLED;
1619 switch (config.rx_filter) {
1620 case HWTSTAMP_FILTER_NONE:
1623 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1624 tstamp_rx_ctrl |= RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT;
1627 config.rx_filter = HWTSTAMP_FILTER_ALL;
1628 tstamp_rx_ctrl |= RCAR_GEN4_RXTSTAMP_TYPE_ALL;
1632 rdev->priv->ptp_priv->tstamp_tx_ctrl = tstamp_tx_ctrl;
1633 rdev->priv->ptp_priv->tstamp_rx_ctrl = tstamp_rx_ctrl;
1635 return copy_to_user(req->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;
1638 static int rswitch_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
1640 if (!netif_running(ndev))
1645 return rswitch_hwstamp_get(ndev, req);
1647 return rswitch_hwstamp_set(ndev, req);
1649 return phy_mii_ioctl(ndev->phydev, req, cmd);
1653 static const struct net_device_ops rswitch_netdev_ops = {
1654 .ndo_open = rswitch_open,
1655 .ndo_stop = rswitch_stop,
1656 .ndo_start_xmit = rswitch_start_xmit,
1657 .ndo_get_stats = rswitch_get_stats,
1658 .ndo_eth_ioctl = rswitch_eth_ioctl,
1659 .ndo_validate_addr = eth_validate_addr,
1660 .ndo_set_mac_address = eth_mac_addr,
1663 static int rswitch_get_ts_info(struct net_device *ndev, struct ethtool_ts_info *info)
1665 struct rswitch_device *rdev = netdev_priv(ndev);
1667 info->phc_index = ptp_clock_index(rdev->priv->ptp_priv->clock);
1668 info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
1669 SOF_TIMESTAMPING_RX_SOFTWARE |
1670 SOF_TIMESTAMPING_SOFTWARE |
1671 SOF_TIMESTAMPING_TX_HARDWARE |
1672 SOF_TIMESTAMPING_RX_HARDWARE |
1673 SOF_TIMESTAMPING_RAW_HARDWARE;
1674 info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON);
1675 info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_ALL);
1680 static const struct ethtool_ops rswitch_ethtool_ops = {
1681 .get_ts_info = rswitch_get_ts_info,
1682 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1683 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1686 static const struct of_device_id renesas_eth_sw_of_table[] = {
1687 { .compatible = "renesas,r8a779f0-ether-switch", },
1690 MODULE_DEVICE_TABLE(of, renesas_eth_sw_of_table);
1692 static void rswitch_etha_init(struct rswitch_private *priv, int index)
1694 struct rswitch_etha *etha = &priv->etha[index];
1696 memset(etha, 0, sizeof(*etha));
1697 etha->index = index;
1698 etha->addr = priv->addr + RSWITCH_ETHA_OFFSET + index * RSWITCH_ETHA_SIZE;
1699 etha->coma_addr = priv->addr;
1701 /* MPIC.PSMCS = (clk [MHz] / (MDC frequency [MHz] * 2) - 1.
1702 * Calculating PSMCS value as MDC frequency = 2.5MHz. So, multiply
1703 * both the numerator and the denominator by 10.
1705 etha->psmcs = clk_get_rate(priv->clk) / 100000 / (25 * 2) - 1;
1708 static int rswitch_device_alloc(struct rswitch_private *priv, int index)
1710 struct platform_device *pdev = priv->pdev;
1711 struct rswitch_device *rdev;
1712 struct net_device *ndev;
1715 if (index >= RSWITCH_NUM_PORTS)
1718 ndev = alloc_etherdev_mqs(sizeof(struct rswitch_device), 1, 1);
1722 SET_NETDEV_DEV(ndev, &pdev->dev);
1725 rdev = netdev_priv(ndev);
1728 priv->rdev[index] = rdev;
1730 rdev->etha = &priv->etha[index];
1731 rdev->addr = priv->addr;
1733 ndev->base_addr = (unsigned long)rdev->addr;
1734 snprintf(ndev->name, IFNAMSIZ, "tsn%d", index);
1735 ndev->netdev_ops = &rswitch_netdev_ops;
1736 ndev->ethtool_ops = &rswitch_ethtool_ops;
1738 netif_napi_add(ndev, &rdev->napi, rswitch_poll);
1740 rdev->np_port = rswitch_get_port_node(rdev);
1741 rdev->disabled = !rdev->np_port;
1742 err = of_get_ethdev_address(rdev->np_port, ndev);
1743 of_node_put(rdev->np_port);
1745 if (is_valid_ether_addr(rdev->etha->mac_addr))
1746 eth_hw_addr_set(ndev, rdev->etha->mac_addr);
1748 eth_hw_addr_random(ndev);
1751 err = rswitch_etha_get_params(rdev);
1753 goto out_get_params;
1755 if (rdev->priv->gwca.speed < rdev->etha->speed)
1756 rdev->priv->gwca.speed = rdev->etha->speed;
1758 err = rswitch_rxdmac_alloc(ndev);
1762 err = rswitch_txdmac_alloc(ndev);
1769 rswitch_rxdmac_free(ndev);
1773 netif_napi_del(&rdev->napi);
1779 static void rswitch_device_free(struct rswitch_private *priv, int index)
1781 struct rswitch_device *rdev = priv->rdev[index];
1782 struct net_device *ndev = rdev->ndev;
1784 rswitch_txdmac_free(ndev);
1785 rswitch_rxdmac_free(ndev);
1786 netif_napi_del(&rdev->napi);
1790 static int rswitch_init(struct rswitch_private *priv)
1795 for (i = 0; i < RSWITCH_NUM_PORTS; i++)
1796 rswitch_etha_init(priv, i);
1798 rswitch_clock_enable(priv);
1799 for (i = 0; i < RSWITCH_NUM_PORTS; i++)
1800 rswitch_etha_read_mac_address(&priv->etha[i]);
1802 rswitch_reset(priv);
1804 rswitch_clock_enable(priv);
1805 rswitch_top_init(priv);
1806 err = rswitch_bpool_config(priv);
1810 rswitch_coma_init(priv);
1812 err = rswitch_gwca_linkfix_alloc(priv);
1816 err = rswitch_gwca_ts_queue_alloc(priv);
1818 goto err_ts_queue_alloc;
1820 for (i = 0; i < RSWITCH_NUM_PORTS; i++) {
1821 err = rswitch_device_alloc(priv, i);
1824 rswitch_device_free(priv, i);
1825 goto err_device_alloc;
1829 rswitch_fwd_init(priv);
1831 err = rcar_gen4_ptp_register(priv->ptp_priv, RCAR_GEN4_PTP_REG_LAYOUT_S4,
1832 RCAR_GEN4_PTP_CLOCK_S4);
1834 goto err_ptp_register;
1836 err = rswitch_gwca_request_irqs(priv);
1838 goto err_gwca_request_irq;
1840 err = rswitch_gwca_ts_request_irqs(priv);
1842 goto err_gwca_ts_request_irq;
1844 err = rswitch_gwca_hw_init(priv);
1846 goto err_gwca_hw_init;
1848 err = rswitch_ether_port_init_all(priv);
1850 goto err_ether_port_init_all;
1852 rswitch_for_each_enabled_port(priv, i) {
1853 err = register_netdev(priv->rdev[i]->ndev);
1855 rswitch_for_each_enabled_port_continue_reverse(priv, i)
1856 unregister_netdev(priv->rdev[i]->ndev);
1857 goto err_register_netdev;
1861 rswitch_for_each_enabled_port(priv, i)
1862 netdev_info(priv->rdev[i]->ndev, "MAC address %pM\n",
1863 priv->rdev[i]->ndev->dev_addr);
1867 err_register_netdev:
1868 rswitch_ether_port_deinit_all(priv);
1870 err_ether_port_init_all:
1871 rswitch_gwca_hw_deinit(priv);
1874 err_gwca_ts_request_irq:
1875 err_gwca_request_irq:
1876 rcar_gen4_ptp_unregister(priv->ptp_priv);
1879 for (i = 0; i < RSWITCH_NUM_PORTS; i++)
1880 rswitch_device_free(priv, i);
1883 rswitch_gwca_ts_queue_free(priv);
1886 rswitch_gwca_linkfix_free(priv);
1891 static const struct soc_device_attribute rswitch_soc_no_speed_change[] = {
1892 { .soc_id = "r8a779f0", .revision = "ES1.0" },
1896 static int renesas_eth_sw_probe(struct platform_device *pdev)
1898 const struct soc_device_attribute *attr;
1899 struct rswitch_private *priv;
1900 struct resource *res;
1903 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "secure_base");
1905 dev_err(&pdev->dev, "invalid resource\n");
1909 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1912 spin_lock_init(&priv->lock);
1914 priv->clk = devm_clk_get(&pdev->dev, NULL);
1915 if (IS_ERR(priv->clk))
1916 return PTR_ERR(priv->clk);
1918 attr = soc_device_match(rswitch_soc_no_speed_change);
1920 priv->etha_no_runtime_change = true;
1922 priv->ptp_priv = rcar_gen4_ptp_alloc(pdev);
1923 if (!priv->ptp_priv)
1926 platform_set_drvdata(pdev, priv);
1928 priv->addr = devm_ioremap_resource(&pdev->dev, res);
1929 if (IS_ERR(priv->addr))
1930 return PTR_ERR(priv->addr);
1932 priv->ptp_priv->addr = priv->addr + RCAR_GEN4_GPTP_OFFSET_S4;
1934 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
1936 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1941 priv->gwca.index = AGENT_INDEX_GWCA;
1942 priv->gwca.num_queues = min(RSWITCH_NUM_PORTS * NUM_QUEUES_PER_NDEV,
1943 RSWITCH_MAX_NUM_QUEUES);
1944 priv->gwca.queues = devm_kcalloc(&pdev->dev, priv->gwca.num_queues,
1945 sizeof(*priv->gwca.queues), GFP_KERNEL);
1946 if (!priv->gwca.queues)
1949 pm_runtime_enable(&pdev->dev);
1950 pm_runtime_get_sync(&pdev->dev);
1952 ret = rswitch_init(priv);
1954 pm_runtime_put(&pdev->dev);
1955 pm_runtime_disable(&pdev->dev);
1959 device_set_wakeup_capable(&pdev->dev, 1);
1964 static void rswitch_deinit(struct rswitch_private *priv)
1968 rswitch_gwca_hw_deinit(priv);
1969 rcar_gen4_ptp_unregister(priv->ptp_priv);
1971 rswitch_for_each_enabled_port(priv, i) {
1972 struct rswitch_device *rdev = priv->rdev[i];
1974 unregister_netdev(rdev->ndev);
1975 rswitch_ether_port_deinit_one(rdev);
1976 phy_exit(priv->rdev[i]->serdes);
1979 for (i = 0; i < RSWITCH_NUM_PORTS; i++)
1980 rswitch_device_free(priv, i);
1982 rswitch_gwca_ts_queue_free(priv);
1983 rswitch_gwca_linkfix_free(priv);
1985 rswitch_clock_disable(priv);
1988 static void renesas_eth_sw_remove(struct platform_device *pdev)
1990 struct rswitch_private *priv = platform_get_drvdata(pdev);
1992 rswitch_deinit(priv);
1994 pm_runtime_put(&pdev->dev);
1995 pm_runtime_disable(&pdev->dev);
1997 platform_set_drvdata(pdev, NULL);
2000 static int renesas_eth_sw_suspend(struct device *dev)
2002 struct rswitch_private *priv = dev_get_drvdata(dev);
2003 struct net_device *ndev;
2006 rswitch_for_each_enabled_port(priv, i) {
2007 ndev = priv->rdev[i]->ndev;
2008 if (netif_running(ndev)) {
2009 netif_device_detach(ndev);
2012 if (priv->rdev[i]->serdes->init_count)
2013 phy_exit(priv->rdev[i]->serdes);
2019 static int renesas_eth_sw_resume(struct device *dev)
2021 struct rswitch_private *priv = dev_get_drvdata(dev);
2022 struct net_device *ndev;
2025 rswitch_for_each_enabled_port(priv, i) {
2026 phy_init(priv->rdev[i]->serdes);
2027 ndev = priv->rdev[i]->ndev;
2028 if (netif_running(ndev)) {
2030 netif_device_attach(ndev);
2037 static DEFINE_SIMPLE_DEV_PM_OPS(renesas_eth_sw_pm_ops, renesas_eth_sw_suspend,
2038 renesas_eth_sw_resume);
2040 static struct platform_driver renesas_eth_sw_driver_platform = {
2041 .probe = renesas_eth_sw_probe,
2042 .remove_new = renesas_eth_sw_remove,
2044 .name = "renesas_eth_sw",
2045 .pm = pm_sleep_ptr(&renesas_eth_sw_pm_ops),
2046 .of_match_table = renesas_eth_sw_of_table,
2049 module_platform_driver(renesas_eth_sw_driver_platform);
2050 MODULE_AUTHOR("Yoshihiro Shimoda");
2051 MODULE_DESCRIPTION("Renesas Ethernet Switch device driver");
2052 MODULE_LICENSE("GPL");