2 * Driver for BCM963xx builtin Ethernet mac
4 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <linux/init.h>
21 #include <linux/interrupt.h>
22 #include <linux/module.h>
23 #include <linux/clk.h>
24 #include <linux/etherdevice.h>
25 #include <linux/slab.h>
26 #include <linux/delay.h>
27 #include <linux/ethtool.h>
28 #include <linux/crc32.h>
29 #include <linux/err.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/platform_device.h>
32 #include <linux/if_vlan.h>
34 #include <bcm63xx_dev_enet.h>
35 #include "bcm63xx_enet.h"
37 static char bcm_enet_driver_name[] = "bcm63xx_enet";
38 static char bcm_enet_driver_version[] = "1.0";
40 static int copybreak __read_mostly = 128;
41 module_param(copybreak, int, 0);
42 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
44 /* io registers memory shared between all devices */
45 static void __iomem *bcm_enet_shared_base[3];
48 * io helpers to access mac registers
50 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
52 return bcm_readl(priv->base + off);
55 static inline void enet_writel(struct bcm_enet_priv *priv,
58 bcm_writel(val, priv->base + off);
62 * io helpers to access switch registers
64 static inline u32 enetsw_readl(struct bcm_enet_priv *priv, u32 off)
66 return bcm_readl(priv->base + off);
69 static inline void enetsw_writel(struct bcm_enet_priv *priv,
72 bcm_writel(val, priv->base + off);
75 static inline u16 enetsw_readw(struct bcm_enet_priv *priv, u32 off)
77 return bcm_readw(priv->base + off);
80 static inline void enetsw_writew(struct bcm_enet_priv *priv,
83 bcm_writew(val, priv->base + off);
86 static inline u8 enetsw_readb(struct bcm_enet_priv *priv, u32 off)
88 return bcm_readb(priv->base + off);
91 static inline void enetsw_writeb(struct bcm_enet_priv *priv,
94 bcm_writeb(val, priv->base + off);
98 /* io helpers to access shared registers */
99 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
101 return bcm_readl(bcm_enet_shared_base[0] + off);
104 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
107 bcm_writel(val, bcm_enet_shared_base[0] + off);
110 static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
112 return bcm_readl(bcm_enet_shared_base[1] +
113 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
116 static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
117 u32 val, u32 off, int chan)
119 bcm_writel(val, bcm_enet_shared_base[1] +
120 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
123 static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
125 return bcm_readl(bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
128 static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
129 u32 val, u32 off, int chan)
131 bcm_writel(val, bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
135 * write given data into mii register and wait for transfer to end
136 * with timeout (average measured transfer time is 25us)
138 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
142 /* make sure mii interrupt status is cleared */
143 enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
145 enet_writel(priv, data, ENET_MIIDATA_REG);
148 /* busy wait on mii interrupt bit, with timeout */
151 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
154 } while (limit-- > 0);
156 return (limit < 0) ? 1 : 0;
160 * MII internal read callback
162 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
167 tmp = regnum << ENET_MIIDATA_REG_SHIFT;
168 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
169 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
170 tmp |= ENET_MIIDATA_OP_READ_MASK;
172 if (do_mdio_op(priv, tmp))
175 val = enet_readl(priv, ENET_MIIDATA_REG);
181 * MII internal write callback
183 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
184 int regnum, u16 value)
188 tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
189 tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
190 tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
191 tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
192 tmp |= ENET_MIIDATA_OP_WRITE_MASK;
194 (void)do_mdio_op(priv, tmp);
199 * MII read callback from phylib
201 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
204 return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
208 * MII write callback from phylib
210 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
211 int regnum, u16 value)
213 return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
217 * MII read callback from mii core
219 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
222 return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
226 * MII write callback from mii core
228 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
229 int regnum, int value)
231 bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
237 static int bcm_enet_refill_rx(struct net_device *dev)
239 struct bcm_enet_priv *priv;
241 priv = netdev_priv(dev);
243 while (priv->rx_desc_count < priv->rx_ring_size) {
244 struct bcm_enet_desc *desc;
250 desc_idx = priv->rx_dirty_desc;
251 desc = &priv->rx_desc_cpu[desc_idx];
253 if (!priv->rx_skb[desc_idx]) {
254 skb = netdev_alloc_skb(dev, priv->rx_skb_size);
257 priv->rx_skb[desc_idx] = skb;
258 p = dma_map_single(&priv->pdev->dev, skb->data,
264 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
265 len_stat |= DMADESC_OWNER_MASK;
266 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
267 len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
268 priv->rx_dirty_desc = 0;
270 priv->rx_dirty_desc++;
273 desc->len_stat = len_stat;
275 priv->rx_desc_count++;
277 /* tell dma engine we allocated one buffer */
278 if (priv->dma_has_sram)
279 enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
281 enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
284 /* If rx ring is still empty, set a timer to try allocating
285 * again at a later time. */
286 if (priv->rx_desc_count == 0 && netif_running(dev)) {
287 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
288 priv->rx_timeout.expires = jiffies + HZ;
289 add_timer(&priv->rx_timeout);
296 * timer callback to defer refill rx queue in case we're OOM
298 static void bcm_enet_refill_rx_timer(unsigned long data)
300 struct net_device *dev;
301 struct bcm_enet_priv *priv;
303 dev = (struct net_device *)data;
304 priv = netdev_priv(dev);
306 spin_lock(&priv->rx_lock);
307 bcm_enet_refill_rx((struct net_device *)data);
308 spin_unlock(&priv->rx_lock);
312 * extract packet from rx queue
314 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
316 struct bcm_enet_priv *priv;
320 priv = netdev_priv(dev);
321 kdev = &priv->pdev->dev;
324 /* don't scan ring further than number of refilled
326 if (budget > priv->rx_desc_count)
327 budget = priv->rx_desc_count;
330 struct bcm_enet_desc *desc;
336 desc_idx = priv->rx_curr_desc;
337 desc = &priv->rx_desc_cpu[desc_idx];
339 /* make sure we actually read the descriptor status at
343 len_stat = desc->len_stat;
345 /* break if dma ownership belongs to hw */
346 if (len_stat & DMADESC_OWNER_MASK)
350 priv->rx_curr_desc++;
351 if (priv->rx_curr_desc == priv->rx_ring_size)
352 priv->rx_curr_desc = 0;
353 priv->rx_desc_count--;
355 /* if the packet does not have start of packet _and_
356 * end of packet flag set, then just recycle it */
357 if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
358 (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
359 dev->stats.rx_dropped++;
363 /* recycle packet if it's marked as bad */
364 if (!priv->enet_is_sw &&
365 unlikely(len_stat & DMADESC_ERR_MASK)) {
366 dev->stats.rx_errors++;
368 if (len_stat & DMADESC_OVSIZE_MASK)
369 dev->stats.rx_length_errors++;
370 if (len_stat & DMADESC_CRC_MASK)
371 dev->stats.rx_crc_errors++;
372 if (len_stat & DMADESC_UNDER_MASK)
373 dev->stats.rx_frame_errors++;
374 if (len_stat & DMADESC_OV_MASK)
375 dev->stats.rx_fifo_errors++;
380 skb = priv->rx_skb[desc_idx];
381 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
382 /* don't include FCS */
385 if (len < copybreak) {
386 struct sk_buff *nskb;
388 nskb = napi_alloc_skb(&priv->napi, len);
390 /* forget packet, just rearm desc */
391 dev->stats.rx_dropped++;
395 dma_sync_single_for_cpu(kdev, desc->address,
396 len, DMA_FROM_DEVICE);
397 memcpy(nskb->data, skb->data, len);
398 dma_sync_single_for_device(kdev, desc->address,
399 len, DMA_FROM_DEVICE);
402 dma_unmap_single(&priv->pdev->dev, desc->address,
403 priv->rx_skb_size, DMA_FROM_DEVICE);
404 priv->rx_skb[desc_idx] = NULL;
408 skb->protocol = eth_type_trans(skb, dev);
409 dev->stats.rx_packets++;
410 dev->stats.rx_bytes += len;
411 netif_receive_skb(skb);
413 } while (--budget > 0);
415 if (processed || !priv->rx_desc_count) {
416 bcm_enet_refill_rx(dev);
419 enet_dmac_writel(priv, priv->dma_chan_en_mask,
420 ENETDMAC_CHANCFG, priv->rx_chan);
428 * try to or force reclaim of transmitted buffers
430 static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
432 struct bcm_enet_priv *priv;
435 priv = netdev_priv(dev);
438 while (priv->tx_desc_count < priv->tx_ring_size) {
439 struct bcm_enet_desc *desc;
442 /* We run in a bh and fight against start_xmit, which
443 * is called with bh disabled */
444 spin_lock(&priv->tx_lock);
446 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
448 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
449 spin_unlock(&priv->tx_lock);
453 /* ensure other field of the descriptor were not read
454 * before we checked ownership */
457 skb = priv->tx_skb[priv->tx_dirty_desc];
458 priv->tx_skb[priv->tx_dirty_desc] = NULL;
459 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
462 priv->tx_dirty_desc++;
463 if (priv->tx_dirty_desc == priv->tx_ring_size)
464 priv->tx_dirty_desc = 0;
465 priv->tx_desc_count++;
467 spin_unlock(&priv->tx_lock);
469 if (desc->len_stat & DMADESC_UNDER_MASK)
470 dev->stats.tx_errors++;
476 if (netif_queue_stopped(dev) && released)
477 netif_wake_queue(dev);
483 * poll func, called by network core
485 static int bcm_enet_poll(struct napi_struct *napi, int budget)
487 struct bcm_enet_priv *priv;
488 struct net_device *dev;
491 priv = container_of(napi, struct bcm_enet_priv, napi);
495 enet_dmac_writel(priv, priv->dma_chan_int_mask,
496 ENETDMAC_IR, priv->rx_chan);
497 enet_dmac_writel(priv, priv->dma_chan_int_mask,
498 ENETDMAC_IR, priv->tx_chan);
500 /* reclaim sent skb */
501 bcm_enet_tx_reclaim(dev, 0);
503 spin_lock(&priv->rx_lock);
504 rx_work_done = bcm_enet_receive_queue(dev, budget);
505 spin_unlock(&priv->rx_lock);
507 if (rx_work_done >= budget) {
508 /* rx queue is not yet empty/clean */
512 /* no more packet in rx/tx queue, remove device from poll
516 /* restore rx/tx interrupt */
517 enet_dmac_writel(priv, priv->dma_chan_int_mask,
518 ENETDMAC_IRMASK, priv->rx_chan);
519 enet_dmac_writel(priv, priv->dma_chan_int_mask,
520 ENETDMAC_IRMASK, priv->tx_chan);
526 * mac interrupt handler
528 static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
530 struct net_device *dev;
531 struct bcm_enet_priv *priv;
535 priv = netdev_priv(dev);
537 stat = enet_readl(priv, ENET_IR_REG);
538 if (!(stat & ENET_IR_MIB))
541 /* clear & mask interrupt */
542 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
543 enet_writel(priv, 0, ENET_IRMASK_REG);
545 /* read mib registers in workqueue */
546 schedule_work(&priv->mib_update_task);
552 * rx/tx dma interrupt handler
554 static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
556 struct net_device *dev;
557 struct bcm_enet_priv *priv;
560 priv = netdev_priv(dev);
562 /* mask rx/tx interrupts */
563 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
564 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
566 napi_schedule(&priv->napi);
572 * tx request callback
574 static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
576 struct bcm_enet_priv *priv;
577 struct bcm_enet_desc *desc;
581 priv = netdev_priv(dev);
583 /* lock against tx reclaim */
584 spin_lock(&priv->tx_lock);
586 /* make sure the tx hw queue is not full, should not happen
587 * since we stop queue before it's the case */
588 if (unlikely(!priv->tx_desc_count)) {
589 netif_stop_queue(dev);
590 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
592 ret = NETDEV_TX_BUSY;
596 /* pad small packets sent on a switch device */
597 if (priv->enet_is_sw && skb->len < 64) {
598 int needed = 64 - skb->len;
601 if (unlikely(skb_tailroom(skb) < needed)) {
602 struct sk_buff *nskb;
604 nskb = skb_copy_expand(skb, 0, needed, GFP_ATOMIC);
606 ret = NETDEV_TX_BUSY;
612 data = skb_put(skb, needed);
613 memset(data, 0, needed);
616 /* point to the next available desc */
617 desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
618 priv->tx_skb[priv->tx_curr_desc] = skb;
620 /* fill descriptor */
621 desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
624 len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
625 len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
629 priv->tx_curr_desc++;
630 if (priv->tx_curr_desc == priv->tx_ring_size) {
631 priv->tx_curr_desc = 0;
632 len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
634 priv->tx_desc_count--;
636 /* dma might be already polling, make sure we update desc
637 * fields in correct order */
639 desc->len_stat = len_stat;
643 enet_dmac_writel(priv, priv->dma_chan_en_mask,
644 ENETDMAC_CHANCFG, priv->tx_chan);
646 /* stop queue if no more desc available */
647 if (!priv->tx_desc_count)
648 netif_stop_queue(dev);
650 dev->stats.tx_bytes += skb->len;
651 dev->stats.tx_packets++;
655 spin_unlock(&priv->tx_lock);
660 * Change the interface's mac address.
662 static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
664 struct bcm_enet_priv *priv;
665 struct sockaddr *addr = p;
668 priv = netdev_priv(dev);
669 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
671 /* use perfect match register 0 to store my mac address */
672 val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
673 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
674 enet_writel(priv, val, ENET_PML_REG(0));
676 val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
677 val |= ENET_PMH_DATAVALID_MASK;
678 enet_writel(priv, val, ENET_PMH_REG(0));
684 * Change rx mode (promiscuous/allmulti) and update multicast list
686 static void bcm_enet_set_multicast_list(struct net_device *dev)
688 struct bcm_enet_priv *priv;
689 struct netdev_hw_addr *ha;
693 priv = netdev_priv(dev);
695 val = enet_readl(priv, ENET_RXCFG_REG);
697 if (dev->flags & IFF_PROMISC)
698 val |= ENET_RXCFG_PROMISC_MASK;
700 val &= ~ENET_RXCFG_PROMISC_MASK;
702 /* only 3 perfect match registers left, first one is used for
704 if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
705 val |= ENET_RXCFG_ALLMCAST_MASK;
707 val &= ~ENET_RXCFG_ALLMCAST_MASK;
709 /* no need to set perfect match registers if we catch all
711 if (val & ENET_RXCFG_ALLMCAST_MASK) {
712 enet_writel(priv, val, ENET_RXCFG_REG);
717 netdev_for_each_mc_addr(ha, dev) {
723 /* update perfect match registers */
725 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
726 (dmi_addr[4] << 8) | dmi_addr[5];
727 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
729 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
730 tmp |= ENET_PMH_DATAVALID_MASK;
731 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
735 enet_writel(priv, 0, ENET_PML_REG(i + 1));
736 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
739 enet_writel(priv, val, ENET_RXCFG_REG);
743 * set mac duplex parameters
745 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
749 val = enet_readl(priv, ENET_TXCTL_REG);
751 val |= ENET_TXCTL_FD_MASK;
753 val &= ~ENET_TXCTL_FD_MASK;
754 enet_writel(priv, val, ENET_TXCTL_REG);
758 * set mac flow control parameters
760 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
764 /* rx flow control (pause frame handling) */
765 val = enet_readl(priv, ENET_RXCFG_REG);
767 val |= ENET_RXCFG_ENFLOW_MASK;
769 val &= ~ENET_RXCFG_ENFLOW_MASK;
770 enet_writel(priv, val, ENET_RXCFG_REG);
772 if (!priv->dma_has_sram)
775 /* tx flow control (pause frame generation) */
776 val = enet_dma_readl(priv, ENETDMA_CFG_REG);
778 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
780 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
781 enet_dma_writel(priv, val, ENETDMA_CFG_REG);
785 * link changed callback (from phylib)
787 static void bcm_enet_adjust_phy_link(struct net_device *dev)
789 struct bcm_enet_priv *priv;
790 struct phy_device *phydev;
793 priv = netdev_priv(dev);
794 phydev = dev->phydev;
797 if (priv->old_link != phydev->link) {
799 priv->old_link = phydev->link;
802 /* reflect duplex change in mac configuration */
803 if (phydev->link && phydev->duplex != priv->old_duplex) {
804 bcm_enet_set_duplex(priv,
805 (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
807 priv->old_duplex = phydev->duplex;
810 /* enable flow control if remote advertise it (trust phylib to
811 * check that duplex is full */
812 if (phydev->link && phydev->pause != priv->old_pause) {
813 int rx_pause_en, tx_pause_en;
816 /* pause was advertised by lpa and us */
819 } else if (!priv->pause_auto) {
820 /* pause setting overrided by user */
821 rx_pause_en = priv->pause_rx;
822 tx_pause_en = priv->pause_tx;
828 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
830 priv->old_pause = phydev->pause;
833 if (status_changed) {
834 pr_info("%s: link %s", dev->name, phydev->link ?
837 pr_cont(" - %d/%s - flow control %s", phydev->speed,
838 DUPLEX_FULL == phydev->duplex ? "full" : "half",
839 phydev->pause == 1 ? "rx&tx" : "off");
846 * link changed callback (if phylib is not used)
848 static void bcm_enet_adjust_link(struct net_device *dev)
850 struct bcm_enet_priv *priv;
852 priv = netdev_priv(dev);
853 bcm_enet_set_duplex(priv, priv->force_duplex_full);
854 bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
855 netif_carrier_on(dev);
857 pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
859 priv->force_speed_100 ? 100 : 10,
860 priv->force_duplex_full ? "full" : "half",
861 priv->pause_rx ? "rx" : "off",
862 priv->pause_tx ? "tx" : "off");
866 * open callback, allocate dma rings & buffers and start rx operation
868 static int bcm_enet_open(struct net_device *dev)
870 struct bcm_enet_priv *priv;
871 struct sockaddr addr;
873 struct phy_device *phydev;
876 char phy_id[MII_BUS_ID_SIZE + 3];
880 priv = netdev_priv(dev);
881 kdev = &priv->pdev->dev;
885 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
886 priv->mii_bus->id, priv->phy_id);
888 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
889 PHY_INTERFACE_MODE_MII);
891 if (IS_ERR(phydev)) {
892 dev_err(kdev, "could not attach to PHY\n");
893 return PTR_ERR(phydev);
896 /* mask with MAC supported features */
897 phydev->supported &= (SUPPORTED_10baseT_Half |
898 SUPPORTED_10baseT_Full |
899 SUPPORTED_100baseT_Half |
900 SUPPORTED_100baseT_Full |
904 phydev->advertising = phydev->supported;
906 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
907 phydev->advertising |= SUPPORTED_Pause;
909 phydev->advertising &= ~SUPPORTED_Pause;
911 phy_attached_info(phydev);
914 priv->old_duplex = -1;
915 priv->old_pause = -1;
918 /* mask all interrupts and request them */
919 enet_writel(priv, 0, ENET_IRMASK_REG);
920 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
921 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
923 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
925 goto out_phy_disconnect;
927 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
932 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
937 /* initialize perfect match registers */
938 for (i = 0; i < 4; i++) {
939 enet_writel(priv, 0, ENET_PML_REG(i));
940 enet_writel(priv, 0, ENET_PMH_REG(i));
943 /* write device mac address */
944 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
945 bcm_enet_set_mac_address(dev, &addr);
947 /* allocate rx dma ring */
948 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
949 p = dma_zalloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
955 priv->rx_desc_alloc_size = size;
956 priv->rx_desc_cpu = p;
958 /* allocate tx dma ring */
959 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
960 p = dma_zalloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
963 goto out_free_rx_ring;
966 priv->tx_desc_alloc_size = size;
967 priv->tx_desc_cpu = p;
969 priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
973 goto out_free_tx_ring;
976 priv->tx_desc_count = priv->tx_ring_size;
977 priv->tx_dirty_desc = 0;
978 priv->tx_curr_desc = 0;
979 spin_lock_init(&priv->tx_lock);
981 /* init & fill rx ring with skbs */
982 priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
986 goto out_free_tx_skb;
989 priv->rx_desc_count = 0;
990 priv->rx_dirty_desc = 0;
991 priv->rx_curr_desc = 0;
993 /* initialize flow control buffer allocation */
994 if (priv->dma_has_sram)
995 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
996 ENETDMA_BUFALLOC_REG(priv->rx_chan));
998 enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
999 ENETDMAC_BUFALLOC, priv->rx_chan);
1001 if (bcm_enet_refill_rx(dev)) {
1002 dev_err(kdev, "cannot allocate rx skb queue\n");
1007 /* write rx & tx ring addresses */
1008 if (priv->dma_has_sram) {
1009 enet_dmas_writel(priv, priv->rx_desc_dma,
1010 ENETDMAS_RSTART_REG, priv->rx_chan);
1011 enet_dmas_writel(priv, priv->tx_desc_dma,
1012 ENETDMAS_RSTART_REG, priv->tx_chan);
1014 enet_dmac_writel(priv, priv->rx_desc_dma,
1015 ENETDMAC_RSTART, priv->rx_chan);
1016 enet_dmac_writel(priv, priv->tx_desc_dma,
1017 ENETDMAC_RSTART, priv->tx_chan);
1020 /* clear remaining state ram for rx & tx channel */
1021 if (priv->dma_has_sram) {
1022 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
1023 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
1024 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
1025 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
1026 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
1027 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
1029 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
1030 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
1033 /* set max rx/tx length */
1034 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
1035 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
1037 /* set dma maximum burst len */
1038 enet_dmac_writel(priv, priv->dma_maxburst,
1039 ENETDMAC_MAXBURST, priv->rx_chan);
1040 enet_dmac_writel(priv, priv->dma_maxburst,
1041 ENETDMAC_MAXBURST, priv->tx_chan);
1043 /* set correct transmit fifo watermark */
1044 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
1046 /* set flow control low/high threshold to 1/3 / 2/3 */
1047 if (priv->dma_has_sram) {
1048 val = priv->rx_ring_size / 3;
1049 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
1050 val = (priv->rx_ring_size * 2) / 3;
1051 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
1053 enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
1054 enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
1055 enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
1058 /* all set, enable mac and interrupts, start dma engine and
1059 * kick rx dma channel */
1061 val = enet_readl(priv, ENET_CTL_REG);
1062 val |= ENET_CTL_ENABLE_MASK;
1063 enet_writel(priv, val, ENET_CTL_REG);
1064 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
1065 enet_dmac_writel(priv, priv->dma_chan_en_mask,
1066 ENETDMAC_CHANCFG, priv->rx_chan);
1068 /* watch "mib counters about to overflow" interrupt */
1069 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
1070 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1072 /* watch "packet transferred" interrupt in rx and tx */
1073 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1074 ENETDMAC_IR, priv->rx_chan);
1075 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1076 ENETDMAC_IR, priv->tx_chan);
1078 /* make sure we enable napi before rx interrupt */
1079 napi_enable(&priv->napi);
1081 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1082 ENETDMAC_IRMASK, priv->rx_chan);
1083 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1084 ENETDMAC_IRMASK, priv->tx_chan);
1089 bcm_enet_adjust_link(dev);
1091 netif_start_queue(dev);
1095 for (i = 0; i < priv->rx_ring_size; i++) {
1096 struct bcm_enet_desc *desc;
1098 if (!priv->rx_skb[i])
1101 desc = &priv->rx_desc_cpu[i];
1102 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1104 kfree_skb(priv->rx_skb[i]);
1106 kfree(priv->rx_skb);
1109 kfree(priv->tx_skb);
1112 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1113 priv->tx_desc_cpu, priv->tx_desc_dma);
1116 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1117 priv->rx_desc_cpu, priv->rx_desc_dma);
1120 free_irq(priv->irq_tx, dev);
1123 free_irq(priv->irq_rx, dev);
1126 free_irq(dev->irq, dev);
1129 phy_disconnect(phydev);
1137 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1142 val = enet_readl(priv, ENET_CTL_REG);
1143 val |= ENET_CTL_DISABLE_MASK;
1144 enet_writel(priv, val, ENET_CTL_REG);
1150 val = enet_readl(priv, ENET_CTL_REG);
1151 if (!(val & ENET_CTL_DISABLE_MASK))
1158 * disable dma in given channel
1160 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1164 enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
1170 val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
1171 if (!(val & ENETDMAC_CHANCFG_EN_MASK))
1180 static int bcm_enet_stop(struct net_device *dev)
1182 struct bcm_enet_priv *priv;
1183 struct device *kdev;
1186 priv = netdev_priv(dev);
1187 kdev = &priv->pdev->dev;
1189 netif_stop_queue(dev);
1190 napi_disable(&priv->napi);
1192 phy_stop(dev->phydev);
1193 del_timer_sync(&priv->rx_timeout);
1195 /* mask all interrupts */
1196 enet_writel(priv, 0, ENET_IRMASK_REG);
1197 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
1198 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
1200 /* make sure no mib update is scheduled */
1201 cancel_work_sync(&priv->mib_update_task);
1203 /* disable dma & mac */
1204 bcm_enet_disable_dma(priv, priv->tx_chan);
1205 bcm_enet_disable_dma(priv, priv->rx_chan);
1206 bcm_enet_disable_mac(priv);
1208 /* force reclaim of all tx buffers */
1209 bcm_enet_tx_reclaim(dev, 1);
1211 /* free the rx skb ring */
1212 for (i = 0; i < priv->rx_ring_size; i++) {
1213 struct bcm_enet_desc *desc;
1215 if (!priv->rx_skb[i])
1218 desc = &priv->rx_desc_cpu[i];
1219 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1221 kfree_skb(priv->rx_skb[i]);
1224 /* free remaining allocated memory */
1225 kfree(priv->rx_skb);
1226 kfree(priv->tx_skb);
1227 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1228 priv->rx_desc_cpu, priv->rx_desc_dma);
1229 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1230 priv->tx_desc_cpu, priv->tx_desc_dma);
1231 free_irq(priv->irq_tx, dev);
1232 free_irq(priv->irq_rx, dev);
1233 free_irq(dev->irq, dev);
1237 phy_disconnect(dev->phydev);
1245 struct bcm_enet_stats {
1246 char stat_string[ETH_GSTRING_LEN];
1252 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1253 offsetof(struct bcm_enet_priv, m)
1254 #define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1255 offsetof(struct net_device_stats, m)
1257 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1258 { "rx_packets", DEV_STAT(rx_packets), -1 },
1259 { "tx_packets", DEV_STAT(tx_packets), -1 },
1260 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1261 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1262 { "rx_errors", DEV_STAT(rx_errors), -1 },
1263 { "tx_errors", DEV_STAT(tx_errors), -1 },
1264 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1265 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1267 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1268 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1269 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1270 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1271 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1272 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1273 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1274 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1275 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1276 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1277 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1278 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1279 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1280 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1281 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1282 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1283 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1284 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1285 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1286 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1287 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1289 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1290 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1291 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1292 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1293 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1294 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1295 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1296 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1297 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1298 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1299 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1300 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1301 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1302 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1303 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1304 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1305 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1306 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1307 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1308 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1309 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1310 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1314 #define BCM_ENET_STATS_LEN ARRAY_SIZE(bcm_enet_gstrings_stats)
1316 static const u32 unused_mib_regs[] = {
1317 ETH_MIB_TX_ALL_OCTETS,
1318 ETH_MIB_TX_ALL_PKTS,
1319 ETH_MIB_RX_ALL_OCTETS,
1320 ETH_MIB_RX_ALL_PKTS,
1324 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1325 struct ethtool_drvinfo *drvinfo)
1327 strlcpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
1328 strlcpy(drvinfo->version, bcm_enet_driver_version,
1329 sizeof(drvinfo->version));
1330 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1331 strlcpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
1334 static int bcm_enet_get_sset_count(struct net_device *netdev,
1337 switch (string_set) {
1339 return BCM_ENET_STATS_LEN;
1345 static void bcm_enet_get_strings(struct net_device *netdev,
1346 u32 stringset, u8 *data)
1350 switch (stringset) {
1352 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1353 memcpy(data + i * ETH_GSTRING_LEN,
1354 bcm_enet_gstrings_stats[i].stat_string,
1361 static void update_mib_counters(struct bcm_enet_priv *priv)
1365 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1366 const struct bcm_enet_stats *s;
1370 s = &bcm_enet_gstrings_stats[i];
1371 if (s->mib_reg == -1)
1374 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1375 p = (char *)priv + s->stat_offset;
1377 if (s->sizeof_stat == sizeof(u64))
1383 /* also empty unused mib counters to make sure mib counter
1384 * overflow interrupt is cleared */
1385 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1386 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1389 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1391 struct bcm_enet_priv *priv;
1393 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1394 mutex_lock(&priv->mib_update_lock);
1395 update_mib_counters(priv);
1396 mutex_unlock(&priv->mib_update_lock);
1398 /* reenable mib interrupt */
1399 if (netif_running(priv->net_dev))
1400 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1403 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1404 struct ethtool_stats *stats,
1407 struct bcm_enet_priv *priv;
1410 priv = netdev_priv(netdev);
1412 mutex_lock(&priv->mib_update_lock);
1413 update_mib_counters(priv);
1415 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1416 const struct bcm_enet_stats *s;
1419 s = &bcm_enet_gstrings_stats[i];
1420 if (s->mib_reg == -1)
1421 p = (char *)&netdev->stats;
1424 p += s->stat_offset;
1425 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1426 *(u64 *)p : *(u32 *)p;
1428 mutex_unlock(&priv->mib_update_lock);
1431 static int bcm_enet_nway_reset(struct net_device *dev)
1433 struct bcm_enet_priv *priv;
1435 priv = netdev_priv(dev);
1436 if (priv->has_phy) {
1439 return genphy_restart_aneg(dev->phydev);
1445 static int bcm_enet_get_link_ksettings(struct net_device *dev,
1446 struct ethtool_link_ksettings *cmd)
1448 struct bcm_enet_priv *priv;
1449 u32 supported, advertising;
1451 priv = netdev_priv(dev);
1453 if (priv->has_phy) {
1456 return phy_ethtool_ksettings_get(dev->phydev, cmd);
1458 cmd->base.autoneg = 0;
1459 cmd->base.speed = (priv->force_speed_100) ?
1460 SPEED_100 : SPEED_10;
1461 cmd->base.duplex = (priv->force_duplex_full) ?
1462 DUPLEX_FULL : DUPLEX_HALF;
1463 supported = ADVERTISED_10baseT_Half |
1464 ADVERTISED_10baseT_Full |
1465 ADVERTISED_100baseT_Half |
1466 ADVERTISED_100baseT_Full;
1468 ethtool_convert_legacy_u32_to_link_mode(
1469 cmd->link_modes.supported, supported);
1470 ethtool_convert_legacy_u32_to_link_mode(
1471 cmd->link_modes.advertising, advertising);
1472 cmd->base.port = PORT_MII;
1477 static int bcm_enet_set_link_ksettings(struct net_device *dev,
1478 const struct ethtool_link_ksettings *cmd)
1480 struct bcm_enet_priv *priv;
1482 priv = netdev_priv(dev);
1483 if (priv->has_phy) {
1486 return phy_ethtool_ksettings_set(dev->phydev, cmd);
1489 if (cmd->base.autoneg ||
1490 (cmd->base.speed != SPEED_100 &&
1491 cmd->base.speed != SPEED_10) ||
1492 cmd->base.port != PORT_MII)
1495 priv->force_speed_100 =
1496 (cmd->base.speed == SPEED_100) ? 1 : 0;
1497 priv->force_duplex_full =
1498 (cmd->base.duplex == DUPLEX_FULL) ? 1 : 0;
1500 if (netif_running(dev))
1501 bcm_enet_adjust_link(dev);
1506 static void bcm_enet_get_ringparam(struct net_device *dev,
1507 struct ethtool_ringparam *ering)
1509 struct bcm_enet_priv *priv;
1511 priv = netdev_priv(dev);
1513 /* rx/tx ring is actually only limited by memory */
1514 ering->rx_max_pending = 8192;
1515 ering->tx_max_pending = 8192;
1516 ering->rx_pending = priv->rx_ring_size;
1517 ering->tx_pending = priv->tx_ring_size;
1520 static int bcm_enet_set_ringparam(struct net_device *dev,
1521 struct ethtool_ringparam *ering)
1523 struct bcm_enet_priv *priv;
1526 priv = netdev_priv(dev);
1529 if (netif_running(dev)) {
1534 priv->rx_ring_size = ering->rx_pending;
1535 priv->tx_ring_size = ering->tx_pending;
1540 err = bcm_enet_open(dev);
1544 bcm_enet_set_multicast_list(dev);
1549 static void bcm_enet_get_pauseparam(struct net_device *dev,
1550 struct ethtool_pauseparam *ecmd)
1552 struct bcm_enet_priv *priv;
1554 priv = netdev_priv(dev);
1555 ecmd->autoneg = priv->pause_auto;
1556 ecmd->rx_pause = priv->pause_rx;
1557 ecmd->tx_pause = priv->pause_tx;
1560 static int bcm_enet_set_pauseparam(struct net_device *dev,
1561 struct ethtool_pauseparam *ecmd)
1563 struct bcm_enet_priv *priv;
1565 priv = netdev_priv(dev);
1567 if (priv->has_phy) {
1568 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1569 /* asymetric pause mode not supported,
1570 * actually possible but integrated PHY has RO
1575 /* no pause autoneg on direct mii connection */
1580 priv->pause_auto = ecmd->autoneg;
1581 priv->pause_rx = ecmd->rx_pause;
1582 priv->pause_tx = ecmd->tx_pause;
1587 static const struct ethtool_ops bcm_enet_ethtool_ops = {
1588 .get_strings = bcm_enet_get_strings,
1589 .get_sset_count = bcm_enet_get_sset_count,
1590 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1591 .nway_reset = bcm_enet_nway_reset,
1592 .get_drvinfo = bcm_enet_get_drvinfo,
1593 .get_link = ethtool_op_get_link,
1594 .get_ringparam = bcm_enet_get_ringparam,
1595 .set_ringparam = bcm_enet_set_ringparam,
1596 .get_pauseparam = bcm_enet_get_pauseparam,
1597 .set_pauseparam = bcm_enet_set_pauseparam,
1598 .get_link_ksettings = bcm_enet_get_link_ksettings,
1599 .set_link_ksettings = bcm_enet_set_link_ksettings,
1602 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1604 struct bcm_enet_priv *priv;
1606 priv = netdev_priv(dev);
1607 if (priv->has_phy) {
1610 return phy_mii_ioctl(dev->phydev, rq, cmd);
1612 struct mii_if_info mii;
1615 mii.mdio_read = bcm_enet_mdio_read_mii;
1616 mii.mdio_write = bcm_enet_mdio_write_mii;
1618 mii.phy_id_mask = 0x3f;
1619 mii.reg_num_mask = 0x1f;
1620 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1625 * calculate actual hardware mtu
1627 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1633 /* add ethernet header + vlan tag size */
1634 actual_mtu += VLAN_ETH_HLEN;
1636 if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1640 * setup maximum size before we get overflow mark in
1641 * descriptor, note that this will not prevent reception of
1642 * big frames, they will be split into multiple buffers
1645 priv->hw_mtu = actual_mtu;
1648 * align rx buffer size to dma burst len, account FCS since
1651 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1652 priv->dma_maxburst * 4);
1657 * adjust mtu, can't be called while device is running
1659 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1663 if (netif_running(dev))
1666 ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1674 * preinit hardware to allow mii operation while device is down
1676 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1681 /* make sure mac is disabled */
1682 bcm_enet_disable_mac(priv);
1684 /* soft reset mac */
1685 val = ENET_CTL_SRESET_MASK;
1686 enet_writel(priv, val, ENET_CTL_REG);
1691 val = enet_readl(priv, ENET_CTL_REG);
1692 if (!(val & ENET_CTL_SRESET_MASK))
1697 /* select correct mii interface */
1698 val = enet_readl(priv, ENET_CTL_REG);
1699 if (priv->use_external_mii)
1700 val |= ENET_CTL_EPHYSEL_MASK;
1702 val &= ~ENET_CTL_EPHYSEL_MASK;
1703 enet_writel(priv, val, ENET_CTL_REG);
1705 /* turn on mdc clock */
1706 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1707 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1709 /* set mib counters to self-clear when read */
1710 val = enet_readl(priv, ENET_MIBCTL_REG);
1711 val |= ENET_MIBCTL_RDCLEAR_MASK;
1712 enet_writel(priv, val, ENET_MIBCTL_REG);
1715 static const struct net_device_ops bcm_enet_ops = {
1716 .ndo_open = bcm_enet_open,
1717 .ndo_stop = bcm_enet_stop,
1718 .ndo_start_xmit = bcm_enet_start_xmit,
1719 .ndo_set_mac_address = bcm_enet_set_mac_address,
1720 .ndo_set_rx_mode = bcm_enet_set_multicast_list,
1721 .ndo_do_ioctl = bcm_enet_ioctl,
1722 .ndo_change_mtu = bcm_enet_change_mtu,
1726 * allocate netdevice, request register memory and register device.
1728 static int bcm_enet_probe(struct platform_device *pdev)
1730 struct bcm_enet_priv *priv;
1731 struct net_device *dev;
1732 struct bcm63xx_enet_platform_data *pd;
1733 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1734 struct mii_bus *bus;
1735 const char *clk_name;
1738 /* stop if shared driver failed, assume driver->probe will be
1739 * called in the same order we register devices (correct ?) */
1740 if (!bcm_enet_shared_base[0])
1743 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1744 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1745 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1746 if (!res_irq || !res_irq_rx || !res_irq_tx)
1750 dev = alloc_etherdev(sizeof(*priv));
1753 priv = netdev_priv(dev);
1755 priv->enet_is_sw = false;
1756 priv->dma_maxburst = BCMENET_DMA_MAXBURST;
1758 ret = compute_hw_mtu(priv, dev->mtu);
1762 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1763 priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
1764 if (IS_ERR(priv->base)) {
1765 ret = PTR_ERR(priv->base);
1769 dev->irq = priv->irq = res_irq->start;
1770 priv->irq_rx = res_irq_rx->start;
1771 priv->irq_tx = res_irq_tx->start;
1772 priv->mac_id = pdev->id;
1774 /* get rx & tx dma channel id for this mac */
1775 if (priv->mac_id == 0) {
1785 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1786 if (IS_ERR(priv->mac_clk)) {
1787 ret = PTR_ERR(priv->mac_clk);
1790 clk_prepare_enable(priv->mac_clk);
1792 /* initialize default and fetch platform data */
1793 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1794 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1796 pd = dev_get_platdata(&pdev->dev);
1798 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1799 priv->has_phy = pd->has_phy;
1800 priv->phy_id = pd->phy_id;
1801 priv->has_phy_interrupt = pd->has_phy_interrupt;
1802 priv->phy_interrupt = pd->phy_interrupt;
1803 priv->use_external_mii = !pd->use_internal_phy;
1804 priv->pause_auto = pd->pause_auto;
1805 priv->pause_rx = pd->pause_rx;
1806 priv->pause_tx = pd->pause_tx;
1807 priv->force_duplex_full = pd->force_duplex_full;
1808 priv->force_speed_100 = pd->force_speed_100;
1809 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
1810 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
1811 priv->dma_chan_width = pd->dma_chan_width;
1812 priv->dma_has_sram = pd->dma_has_sram;
1813 priv->dma_desc_shift = pd->dma_desc_shift;
1816 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1817 /* using internal PHY, enable clock */
1818 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1819 if (IS_ERR(priv->phy_clk)) {
1820 ret = PTR_ERR(priv->phy_clk);
1821 priv->phy_clk = NULL;
1822 goto out_put_clk_mac;
1824 clk_prepare_enable(priv->phy_clk);
1827 /* do minimal hardware init to be able to probe mii bus */
1828 bcm_enet_hw_preinit(priv);
1830 /* MII bus registration */
1831 if (priv->has_phy) {
1833 priv->mii_bus = mdiobus_alloc();
1834 if (!priv->mii_bus) {
1839 bus = priv->mii_bus;
1840 bus->name = "bcm63xx_enet MII bus";
1841 bus->parent = &pdev->dev;
1843 bus->read = bcm_enet_mdio_read_phylib;
1844 bus->write = bcm_enet_mdio_write_phylib;
1845 sprintf(bus->id, "%s-%d", pdev->name, priv->mac_id);
1847 /* only probe bus where we think the PHY is, because
1848 * the mdio read operation return 0 instead of 0xffff
1849 * if a slave is not present on hw */
1850 bus->phy_mask = ~(1 << priv->phy_id);
1852 if (priv->has_phy_interrupt)
1853 bus->irq[priv->phy_id] = priv->phy_interrupt;
1855 ret = mdiobus_register(bus);
1857 dev_err(&pdev->dev, "unable to register mdio bus\n");
1862 /* run platform code to initialize PHY device */
1863 if (pd && pd->mii_config &&
1864 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1865 bcm_enet_mdio_write_mii)) {
1866 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1871 spin_lock_init(&priv->rx_lock);
1873 /* init rx timeout (used for oom) */
1874 init_timer(&priv->rx_timeout);
1875 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1876 priv->rx_timeout.data = (unsigned long)dev;
1878 /* init the mib update lock&work */
1879 mutex_init(&priv->mib_update_lock);
1880 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1882 /* zero mib counters */
1883 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1884 enet_writel(priv, 0, ENET_MIB_REG(i));
1886 /* register netdevice */
1887 dev->netdev_ops = &bcm_enet_ops;
1888 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1890 dev->ethtool_ops = &bcm_enet_ethtool_ops;
1891 SET_NETDEV_DEV(dev, &pdev->dev);
1893 ret = register_netdev(dev);
1895 goto out_unregister_mdio;
1897 netif_carrier_off(dev);
1898 platform_set_drvdata(pdev, dev);
1900 priv->net_dev = dev;
1904 out_unregister_mdio:
1906 mdiobus_unregister(priv->mii_bus);
1910 mdiobus_free(priv->mii_bus);
1913 /* turn off mdc clock */
1914 enet_writel(priv, 0, ENET_MIISC_REG);
1915 if (priv->phy_clk) {
1916 clk_disable_unprepare(priv->phy_clk);
1917 clk_put(priv->phy_clk);
1921 clk_disable_unprepare(priv->mac_clk);
1922 clk_put(priv->mac_clk);
1930 * exit func, stops hardware and unregisters netdevice
1932 static int bcm_enet_remove(struct platform_device *pdev)
1934 struct bcm_enet_priv *priv;
1935 struct net_device *dev;
1937 /* stop netdevice */
1938 dev = platform_get_drvdata(pdev);
1939 priv = netdev_priv(dev);
1940 unregister_netdev(dev);
1942 /* turn off mdc clock */
1943 enet_writel(priv, 0, ENET_MIISC_REG);
1945 if (priv->has_phy) {
1946 mdiobus_unregister(priv->mii_bus);
1947 mdiobus_free(priv->mii_bus);
1949 struct bcm63xx_enet_platform_data *pd;
1951 pd = dev_get_platdata(&pdev->dev);
1952 if (pd && pd->mii_config)
1953 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1954 bcm_enet_mdio_write_mii);
1957 /* disable hw block clocks */
1958 if (priv->phy_clk) {
1959 clk_disable_unprepare(priv->phy_clk);
1960 clk_put(priv->phy_clk);
1962 clk_disable_unprepare(priv->mac_clk);
1963 clk_put(priv->mac_clk);
1969 struct platform_driver bcm63xx_enet_driver = {
1970 .probe = bcm_enet_probe,
1971 .remove = bcm_enet_remove,
1973 .name = "bcm63xx_enet",
1974 .owner = THIS_MODULE,
1979 * switch mii access callbacks
1981 static int bcmenet_sw_mdio_read(struct bcm_enet_priv *priv,
1982 int ext, int phy_id, int location)
1987 spin_lock_bh(&priv->enetsw_mdio_lock);
1988 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
1990 reg = ENETSW_MDIOC_RD_MASK |
1991 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
1992 (location << ENETSW_MDIOC_REG_SHIFT);
1995 reg |= ENETSW_MDIOC_EXT_MASK;
1997 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
1999 ret = enetsw_readw(priv, ENETSW_MDIOD_REG);
2000 spin_unlock_bh(&priv->enetsw_mdio_lock);
2004 static void bcmenet_sw_mdio_write(struct bcm_enet_priv *priv,
2005 int ext, int phy_id, int location,
2010 spin_lock_bh(&priv->enetsw_mdio_lock);
2011 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
2013 reg = ENETSW_MDIOC_WR_MASK |
2014 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
2015 (location << ENETSW_MDIOC_REG_SHIFT);
2018 reg |= ENETSW_MDIOC_EXT_MASK;
2022 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
2024 spin_unlock_bh(&priv->enetsw_mdio_lock);
2027 static inline int bcm_enet_port_is_rgmii(int portid)
2029 return portid >= ENETSW_RGMII_PORT0;
2033 * enet sw PHY polling
2035 static void swphy_poll_timer(unsigned long data)
2037 struct bcm_enet_priv *priv = (struct bcm_enet_priv *)data;
2040 for (i = 0; i < priv->num_ports; i++) {
2041 struct bcm63xx_enetsw_port *port;
2042 int val, j, up, advertise, lpa, speed, duplex, media;
2043 int external_phy = bcm_enet_port_is_rgmii(i);
2046 port = &priv->used_ports[i];
2050 if (port->bypass_link)
2053 /* dummy read to clear */
2054 for (j = 0; j < 2; j++)
2055 val = bcmenet_sw_mdio_read(priv, external_phy,
2056 port->phy_id, MII_BMSR);
2061 up = (val & BMSR_LSTATUS) ? 1 : 0;
2062 if (!(up ^ priv->sw_port_link[i]))
2065 priv->sw_port_link[i] = up;
2069 dev_info(&priv->pdev->dev, "link DOWN on %s\n",
2071 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2072 ENETSW_PORTOV_REG(i));
2073 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2074 ENETSW_PTCTRL_TXDIS_MASK,
2075 ENETSW_PTCTRL_REG(i));
2079 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2080 port->phy_id, MII_ADVERTISE);
2082 lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
2085 /* figure out media and duplex from advertise and LPA values */
2086 media = mii_nway_result(lpa & advertise);
2087 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
2089 if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
2094 if (val & BMSR_ESTATEN) {
2095 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2096 port->phy_id, MII_CTRL1000);
2098 lpa = bcmenet_sw_mdio_read(priv, external_phy,
2099 port->phy_id, MII_STAT1000);
2101 if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
2102 && lpa & (LPA_1000FULL | LPA_1000HALF)) {
2104 duplex = (lpa & LPA_1000FULL);
2108 dev_info(&priv->pdev->dev,
2109 "link UP on %s, %dMbps, %s-duplex\n",
2110 port->name, speed, duplex ? "full" : "half");
2112 override = ENETSW_PORTOV_ENABLE_MASK |
2113 ENETSW_PORTOV_LINKUP_MASK;
2116 override |= ENETSW_IMPOV_1000_MASK;
2117 else if (speed == 100)
2118 override |= ENETSW_IMPOV_100_MASK;
2120 override |= ENETSW_IMPOV_FDX_MASK;
2122 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2123 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2126 priv->swphy_poll.expires = jiffies + HZ;
2127 add_timer(&priv->swphy_poll);
2131 * open callback, allocate dma rings & buffers and start rx operation
2133 static int bcm_enetsw_open(struct net_device *dev)
2135 struct bcm_enet_priv *priv;
2136 struct device *kdev;
2142 priv = netdev_priv(dev);
2143 kdev = &priv->pdev->dev;
2145 /* mask all interrupts and request them */
2146 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2147 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2149 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
2154 if (priv->irq_tx != -1) {
2155 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
2158 goto out_freeirq_rx;
2161 /* allocate rx dma ring */
2162 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
2163 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
2165 dev_err(kdev, "cannot allocate rx ring %u\n", size);
2167 goto out_freeirq_tx;
2171 priv->rx_desc_alloc_size = size;
2172 priv->rx_desc_cpu = p;
2174 /* allocate tx dma ring */
2175 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
2176 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
2178 dev_err(kdev, "cannot allocate tx ring\n");
2180 goto out_free_rx_ring;
2184 priv->tx_desc_alloc_size = size;
2185 priv->tx_desc_cpu = p;
2187 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
2189 if (!priv->tx_skb) {
2190 dev_err(kdev, "cannot allocate rx skb queue\n");
2192 goto out_free_tx_ring;
2195 priv->tx_desc_count = priv->tx_ring_size;
2196 priv->tx_dirty_desc = 0;
2197 priv->tx_curr_desc = 0;
2198 spin_lock_init(&priv->tx_lock);
2200 /* init & fill rx ring with skbs */
2201 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
2203 if (!priv->rx_skb) {
2204 dev_err(kdev, "cannot allocate rx skb queue\n");
2206 goto out_free_tx_skb;
2209 priv->rx_desc_count = 0;
2210 priv->rx_dirty_desc = 0;
2211 priv->rx_curr_desc = 0;
2213 /* disable all ports */
2214 for (i = 0; i < priv->num_ports; i++) {
2215 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2216 ENETSW_PORTOV_REG(i));
2217 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2218 ENETSW_PTCTRL_TXDIS_MASK,
2219 ENETSW_PTCTRL_REG(i));
2221 priv->sw_port_link[i] = 0;
2225 val = enetsw_readb(priv, ENETSW_GMCR_REG);
2226 val |= ENETSW_GMCR_RST_MIB_MASK;
2227 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2229 val &= ~ENETSW_GMCR_RST_MIB_MASK;
2230 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2233 /* force CPU port state */
2234 val = enetsw_readb(priv, ENETSW_IMPOV_REG);
2235 val |= ENETSW_IMPOV_FORCE_MASK | ENETSW_IMPOV_LINKUP_MASK;
2236 enetsw_writeb(priv, val, ENETSW_IMPOV_REG);
2238 /* enable switch forward engine */
2239 val = enetsw_readb(priv, ENETSW_SWMODE_REG);
2240 val |= ENETSW_SWMODE_FWD_EN_MASK;
2241 enetsw_writeb(priv, val, ENETSW_SWMODE_REG);
2243 /* enable jumbo on all ports */
2244 enetsw_writel(priv, 0x1ff, ENETSW_JMBCTL_PORT_REG);
2245 enetsw_writew(priv, 9728, ENETSW_JMBCTL_MAXSIZE_REG);
2247 /* initialize flow control buffer allocation */
2248 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
2249 ENETDMA_BUFALLOC_REG(priv->rx_chan));
2251 if (bcm_enet_refill_rx(dev)) {
2252 dev_err(kdev, "cannot allocate rx skb queue\n");
2257 /* write rx & tx ring addresses */
2258 enet_dmas_writel(priv, priv->rx_desc_dma,
2259 ENETDMAS_RSTART_REG, priv->rx_chan);
2260 enet_dmas_writel(priv, priv->tx_desc_dma,
2261 ENETDMAS_RSTART_REG, priv->tx_chan);
2263 /* clear remaining state ram for rx & tx channel */
2264 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
2265 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
2266 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
2267 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
2268 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
2269 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
2271 /* set dma maximum burst len */
2272 enet_dmac_writel(priv, priv->dma_maxburst,
2273 ENETDMAC_MAXBURST, priv->rx_chan);
2274 enet_dmac_writel(priv, priv->dma_maxburst,
2275 ENETDMAC_MAXBURST, priv->tx_chan);
2277 /* set flow control low/high threshold to 1/3 / 2/3 */
2278 val = priv->rx_ring_size / 3;
2279 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
2280 val = (priv->rx_ring_size * 2) / 3;
2281 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
2283 /* all set, enable mac and interrupts, start dma engine and
2284 * kick rx dma channel
2287 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
2288 enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
2289 ENETDMAC_CHANCFG, priv->rx_chan);
2291 /* watch "packet transferred" interrupt in rx and tx */
2292 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2293 ENETDMAC_IR, priv->rx_chan);
2294 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2295 ENETDMAC_IR, priv->tx_chan);
2297 /* make sure we enable napi before rx interrupt */
2298 napi_enable(&priv->napi);
2300 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2301 ENETDMAC_IRMASK, priv->rx_chan);
2302 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2303 ENETDMAC_IRMASK, priv->tx_chan);
2305 netif_carrier_on(dev);
2306 netif_start_queue(dev);
2308 /* apply override config for bypass_link ports here. */
2309 for (i = 0; i < priv->num_ports; i++) {
2310 struct bcm63xx_enetsw_port *port;
2312 port = &priv->used_ports[i];
2316 if (!port->bypass_link)
2319 override = ENETSW_PORTOV_ENABLE_MASK |
2320 ENETSW_PORTOV_LINKUP_MASK;
2322 switch (port->force_speed) {
2324 override |= ENETSW_IMPOV_1000_MASK;
2327 override |= ENETSW_IMPOV_100_MASK;
2332 pr_warn("invalid forced speed on port %s: assume 10\n",
2337 if (port->force_duplex_full)
2338 override |= ENETSW_IMPOV_FDX_MASK;
2341 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2342 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2345 /* start phy polling timer */
2346 init_timer(&priv->swphy_poll);
2347 priv->swphy_poll.function = swphy_poll_timer;
2348 priv->swphy_poll.data = (unsigned long)priv;
2349 priv->swphy_poll.expires = jiffies;
2350 add_timer(&priv->swphy_poll);
2354 for (i = 0; i < priv->rx_ring_size; i++) {
2355 struct bcm_enet_desc *desc;
2357 if (!priv->rx_skb[i])
2360 desc = &priv->rx_desc_cpu[i];
2361 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2363 kfree_skb(priv->rx_skb[i]);
2365 kfree(priv->rx_skb);
2368 kfree(priv->tx_skb);
2371 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2372 priv->tx_desc_cpu, priv->tx_desc_dma);
2375 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2376 priv->rx_desc_cpu, priv->rx_desc_dma);
2379 if (priv->irq_tx != -1)
2380 free_irq(priv->irq_tx, dev);
2383 free_irq(priv->irq_rx, dev);
2390 static int bcm_enetsw_stop(struct net_device *dev)
2392 struct bcm_enet_priv *priv;
2393 struct device *kdev;
2396 priv = netdev_priv(dev);
2397 kdev = &priv->pdev->dev;
2399 del_timer_sync(&priv->swphy_poll);
2400 netif_stop_queue(dev);
2401 napi_disable(&priv->napi);
2402 del_timer_sync(&priv->rx_timeout);
2404 /* mask all interrupts */
2405 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2406 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2408 /* disable dma & mac */
2409 bcm_enet_disable_dma(priv, priv->tx_chan);
2410 bcm_enet_disable_dma(priv, priv->rx_chan);
2412 /* force reclaim of all tx buffers */
2413 bcm_enet_tx_reclaim(dev, 1);
2415 /* free the rx skb ring */
2416 for (i = 0; i < priv->rx_ring_size; i++) {
2417 struct bcm_enet_desc *desc;
2419 if (!priv->rx_skb[i])
2422 desc = &priv->rx_desc_cpu[i];
2423 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2425 kfree_skb(priv->rx_skb[i]);
2428 /* free remaining allocated memory */
2429 kfree(priv->rx_skb);
2430 kfree(priv->tx_skb);
2431 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2432 priv->rx_desc_cpu, priv->rx_desc_dma);
2433 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2434 priv->tx_desc_cpu, priv->tx_desc_dma);
2435 if (priv->irq_tx != -1)
2436 free_irq(priv->irq_tx, dev);
2437 free_irq(priv->irq_rx, dev);
2442 /* try to sort out phy external status by walking the used_port field
2443 * in the bcm_enet_priv structure. in case the phy address is not
2444 * assigned to any physical port on the switch, assume it is external
2445 * (and yell at the user).
2447 static int bcm_enetsw_phy_is_external(struct bcm_enet_priv *priv, int phy_id)
2451 for (i = 0; i < priv->num_ports; ++i) {
2452 if (!priv->used_ports[i].used)
2454 if (priv->used_ports[i].phy_id == phy_id)
2455 return bcm_enet_port_is_rgmii(i);
2458 printk_once(KERN_WARNING "bcm63xx_enet: could not find a used port with phy_id %i, assuming phy is external\n",
2463 /* can't use bcmenet_sw_mdio_read directly as we need to sort out
2464 * external/internal status of the given phy_id first.
2466 static int bcm_enetsw_mii_mdio_read(struct net_device *dev, int phy_id,
2469 struct bcm_enet_priv *priv;
2471 priv = netdev_priv(dev);
2472 return bcmenet_sw_mdio_read(priv,
2473 bcm_enetsw_phy_is_external(priv, phy_id),
2477 /* can't use bcmenet_sw_mdio_write directly as we need to sort out
2478 * external/internal status of the given phy_id first.
2480 static void bcm_enetsw_mii_mdio_write(struct net_device *dev, int phy_id,
2484 struct bcm_enet_priv *priv;
2486 priv = netdev_priv(dev);
2487 bcmenet_sw_mdio_write(priv, bcm_enetsw_phy_is_external(priv, phy_id),
2488 phy_id, location, val);
2491 static int bcm_enetsw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2493 struct mii_if_info mii;
2496 mii.mdio_read = bcm_enetsw_mii_mdio_read;
2497 mii.mdio_write = bcm_enetsw_mii_mdio_write;
2499 mii.phy_id_mask = 0x3f;
2500 mii.reg_num_mask = 0x1f;
2501 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
2505 static const struct net_device_ops bcm_enetsw_ops = {
2506 .ndo_open = bcm_enetsw_open,
2507 .ndo_stop = bcm_enetsw_stop,
2508 .ndo_start_xmit = bcm_enet_start_xmit,
2509 .ndo_change_mtu = bcm_enet_change_mtu,
2510 .ndo_do_ioctl = bcm_enetsw_ioctl,
2514 static const struct bcm_enet_stats bcm_enetsw_gstrings_stats[] = {
2515 { "rx_packets", DEV_STAT(rx_packets), -1 },
2516 { "tx_packets", DEV_STAT(tx_packets), -1 },
2517 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
2518 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
2519 { "rx_errors", DEV_STAT(rx_errors), -1 },
2520 { "tx_errors", DEV_STAT(tx_errors), -1 },
2521 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
2522 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
2524 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETHSW_MIB_RX_GD_OCT },
2525 { "tx_unicast", GEN_STAT(mib.tx_unicast), ETHSW_MIB_RX_BRDCAST },
2526 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETHSW_MIB_RX_BRDCAST },
2527 { "tx_multicast", GEN_STAT(mib.tx_mult), ETHSW_MIB_RX_MULT },
2528 { "tx_64_octets", GEN_STAT(mib.tx_64), ETHSW_MIB_RX_64 },
2529 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETHSW_MIB_RX_65_127 },
2530 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETHSW_MIB_RX_128_255 },
2531 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETHSW_MIB_RX_256_511 },
2532 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETHSW_MIB_RX_512_1023},
2533 { "tx_1024_1522_oct", GEN_STAT(mib.tx_1024_max),
2534 ETHSW_MIB_RX_1024_1522 },
2535 { "tx_1523_2047_oct", GEN_STAT(mib.tx_1523_2047),
2536 ETHSW_MIB_RX_1523_2047 },
2537 { "tx_2048_4095_oct", GEN_STAT(mib.tx_2048_4095),
2538 ETHSW_MIB_RX_2048_4095 },
2539 { "tx_4096_8191_oct", GEN_STAT(mib.tx_4096_8191),
2540 ETHSW_MIB_RX_4096_8191 },
2541 { "tx_8192_9728_oct", GEN_STAT(mib.tx_8192_9728),
2542 ETHSW_MIB_RX_8192_9728 },
2543 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR },
2544 { "tx_oversize_drop", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR_DISC },
2545 { "tx_dropped", GEN_STAT(mib.tx_drop), ETHSW_MIB_RX_DROP },
2546 { "tx_undersize", GEN_STAT(mib.tx_underrun), ETHSW_MIB_RX_UND },
2547 { "tx_pause", GEN_STAT(mib.tx_pause), ETHSW_MIB_RX_PAUSE },
2549 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETHSW_MIB_TX_ALL_OCT },
2550 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETHSW_MIB_TX_BRDCAST },
2551 { "rx_multicast", GEN_STAT(mib.rx_mult), ETHSW_MIB_TX_MULT },
2552 { "rx_unicast", GEN_STAT(mib.rx_unicast), ETHSW_MIB_TX_MULT },
2553 { "rx_pause", GEN_STAT(mib.rx_pause), ETHSW_MIB_TX_PAUSE },
2554 { "rx_dropped", GEN_STAT(mib.rx_drop), ETHSW_MIB_TX_DROP_PKTS },
2558 #define BCM_ENETSW_STATS_LEN \
2559 (sizeof(bcm_enetsw_gstrings_stats) / sizeof(struct bcm_enet_stats))
2561 static void bcm_enetsw_get_strings(struct net_device *netdev,
2562 u32 stringset, u8 *data)
2566 switch (stringset) {
2568 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2569 memcpy(data + i * ETH_GSTRING_LEN,
2570 bcm_enetsw_gstrings_stats[i].stat_string,
2577 static int bcm_enetsw_get_sset_count(struct net_device *netdev,
2580 switch (string_set) {
2582 return BCM_ENETSW_STATS_LEN;
2588 static void bcm_enetsw_get_drvinfo(struct net_device *netdev,
2589 struct ethtool_drvinfo *drvinfo)
2591 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
2592 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
2593 strncpy(drvinfo->fw_version, "N/A", 32);
2594 strncpy(drvinfo->bus_info, "bcm63xx", 32);
2597 static void bcm_enetsw_get_ethtool_stats(struct net_device *netdev,
2598 struct ethtool_stats *stats,
2601 struct bcm_enet_priv *priv;
2604 priv = netdev_priv(netdev);
2606 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2607 const struct bcm_enet_stats *s;
2612 s = &bcm_enetsw_gstrings_stats[i];
2618 lo = enetsw_readl(priv, ENETSW_MIB_REG(reg));
2619 p = (char *)priv + s->stat_offset;
2621 if (s->sizeof_stat == sizeof(u64)) {
2622 hi = enetsw_readl(priv, ENETSW_MIB_REG(reg + 1));
2623 *(u64 *)p = ((u64)hi << 32 | lo);
2629 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2630 const struct bcm_enet_stats *s;
2633 s = &bcm_enetsw_gstrings_stats[i];
2635 if (s->mib_reg == -1)
2636 p = (char *)&netdev->stats + s->stat_offset;
2638 p = (char *)priv + s->stat_offset;
2640 data[i] = (s->sizeof_stat == sizeof(u64)) ?
2641 *(u64 *)p : *(u32 *)p;
2645 static void bcm_enetsw_get_ringparam(struct net_device *dev,
2646 struct ethtool_ringparam *ering)
2648 struct bcm_enet_priv *priv;
2650 priv = netdev_priv(dev);
2652 /* rx/tx ring is actually only limited by memory */
2653 ering->rx_max_pending = 8192;
2654 ering->tx_max_pending = 8192;
2655 ering->rx_mini_max_pending = 0;
2656 ering->rx_jumbo_max_pending = 0;
2657 ering->rx_pending = priv->rx_ring_size;
2658 ering->tx_pending = priv->tx_ring_size;
2661 static int bcm_enetsw_set_ringparam(struct net_device *dev,
2662 struct ethtool_ringparam *ering)
2664 struct bcm_enet_priv *priv;
2667 priv = netdev_priv(dev);
2670 if (netif_running(dev)) {
2671 bcm_enetsw_stop(dev);
2675 priv->rx_ring_size = ering->rx_pending;
2676 priv->tx_ring_size = ering->tx_pending;
2681 err = bcm_enetsw_open(dev);
2688 static struct ethtool_ops bcm_enetsw_ethtool_ops = {
2689 .get_strings = bcm_enetsw_get_strings,
2690 .get_sset_count = bcm_enetsw_get_sset_count,
2691 .get_ethtool_stats = bcm_enetsw_get_ethtool_stats,
2692 .get_drvinfo = bcm_enetsw_get_drvinfo,
2693 .get_ringparam = bcm_enetsw_get_ringparam,
2694 .set_ringparam = bcm_enetsw_set_ringparam,
2697 /* allocate netdevice, request register memory and register device. */
2698 static int bcm_enetsw_probe(struct platform_device *pdev)
2700 struct bcm_enet_priv *priv;
2701 struct net_device *dev;
2702 struct bcm63xx_enetsw_platform_data *pd;
2703 struct resource *res_mem;
2704 int ret, irq_rx, irq_tx;
2706 /* stop if shared driver failed, assume driver->probe will be
2707 * called in the same order we register devices (correct ?)
2709 if (!bcm_enet_shared_base[0])
2712 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2713 irq_rx = platform_get_irq(pdev, 0);
2714 irq_tx = platform_get_irq(pdev, 1);
2715 if (!res_mem || irq_rx < 0)
2719 dev = alloc_etherdev(sizeof(*priv));
2722 priv = netdev_priv(dev);
2723 memset(priv, 0, sizeof(*priv));
2725 /* initialize default and fetch platform data */
2726 priv->enet_is_sw = true;
2727 priv->irq_rx = irq_rx;
2728 priv->irq_tx = irq_tx;
2729 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
2730 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
2731 priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
2733 pd = dev_get_platdata(&pdev->dev);
2735 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2736 memcpy(priv->used_ports, pd->used_ports,
2737 sizeof(pd->used_ports));
2738 priv->num_ports = pd->num_ports;
2739 priv->dma_has_sram = pd->dma_has_sram;
2740 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
2741 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
2742 priv->dma_chan_width = pd->dma_chan_width;
2745 ret = compute_hw_mtu(priv, dev->mtu);
2749 if (!request_mem_region(res_mem->start, resource_size(res_mem),
2750 "bcm63xx_enetsw")) {
2755 priv->base = ioremap(res_mem->start, resource_size(res_mem));
2756 if (priv->base == NULL) {
2758 goto out_release_mem;
2761 priv->mac_clk = clk_get(&pdev->dev, "enetsw");
2762 if (IS_ERR(priv->mac_clk)) {
2763 ret = PTR_ERR(priv->mac_clk);
2766 clk_enable(priv->mac_clk);
2770 spin_lock_init(&priv->rx_lock);
2772 /* init rx timeout (used for oom) */
2773 init_timer(&priv->rx_timeout);
2774 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
2775 priv->rx_timeout.data = (unsigned long)dev;
2777 /* register netdevice */
2778 dev->netdev_ops = &bcm_enetsw_ops;
2779 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
2780 dev->ethtool_ops = &bcm_enetsw_ethtool_ops;
2781 SET_NETDEV_DEV(dev, &pdev->dev);
2783 spin_lock_init(&priv->enetsw_mdio_lock);
2785 ret = register_netdev(dev);
2789 netif_carrier_off(dev);
2790 platform_set_drvdata(pdev, dev);
2792 priv->net_dev = dev;
2797 clk_put(priv->mac_clk);
2800 iounmap(priv->base);
2803 release_mem_region(res_mem->start, resource_size(res_mem));
2810 /* exit func, stops hardware and unregisters netdevice */
2811 static int bcm_enetsw_remove(struct platform_device *pdev)
2813 struct bcm_enet_priv *priv;
2814 struct net_device *dev;
2815 struct resource *res;
2817 /* stop netdevice */
2818 dev = platform_get_drvdata(pdev);
2819 priv = netdev_priv(dev);
2820 unregister_netdev(dev);
2822 /* release device resources */
2823 iounmap(priv->base);
2824 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2825 release_mem_region(res->start, resource_size(res));
2831 struct platform_driver bcm63xx_enetsw_driver = {
2832 .probe = bcm_enetsw_probe,
2833 .remove = bcm_enetsw_remove,
2835 .name = "bcm63xx_enetsw",
2836 .owner = THIS_MODULE,
2840 /* reserve & remap memory space shared between all macs */
2841 static int bcm_enet_shared_probe(struct platform_device *pdev)
2843 struct resource *res;
2847 memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
2849 for (i = 0; i < 3; i++) {
2850 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
2851 p[i] = devm_ioremap_resource(&pdev->dev, res);
2853 return PTR_ERR(p[i]);
2856 memcpy(bcm_enet_shared_base, p, sizeof(bcm_enet_shared_base));
2861 static int bcm_enet_shared_remove(struct platform_device *pdev)
2866 /* this "shared" driver is needed because both macs share a single
2869 struct platform_driver bcm63xx_enet_shared_driver = {
2870 .probe = bcm_enet_shared_probe,
2871 .remove = bcm_enet_shared_remove,
2873 .name = "bcm63xx_enet_shared",
2874 .owner = THIS_MODULE,
2878 static struct platform_driver * const drivers[] = {
2879 &bcm63xx_enet_shared_driver,
2880 &bcm63xx_enet_driver,
2881 &bcm63xx_enetsw_driver,
2885 static int __init bcm_enet_init(void)
2887 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
2890 static void __exit bcm_enet_exit(void)
2892 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
2896 module_init(bcm_enet_init);
2897 module_exit(bcm_enet_exit);
2899 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
2900 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
2901 MODULE_LICENSE("GPL");