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 = priv->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;
916 priv->phydev = phydev;
919 /* mask all interrupts and request them */
920 enet_writel(priv, 0, ENET_IRMASK_REG);
921 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
922 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
924 ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
926 goto out_phy_disconnect;
928 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
933 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
938 /* initialize perfect match registers */
939 for (i = 0; i < 4; i++) {
940 enet_writel(priv, 0, ENET_PML_REG(i));
941 enet_writel(priv, 0, ENET_PMH_REG(i));
944 /* write device mac address */
945 memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
946 bcm_enet_set_mac_address(dev, &addr);
948 /* allocate rx dma ring */
949 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
950 p = dma_zalloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
956 priv->rx_desc_alloc_size = size;
957 priv->rx_desc_cpu = p;
959 /* allocate tx dma ring */
960 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
961 p = dma_zalloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
964 goto out_free_rx_ring;
967 priv->tx_desc_alloc_size = size;
968 priv->tx_desc_cpu = p;
970 priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
974 goto out_free_tx_ring;
977 priv->tx_desc_count = priv->tx_ring_size;
978 priv->tx_dirty_desc = 0;
979 priv->tx_curr_desc = 0;
980 spin_lock_init(&priv->tx_lock);
982 /* init & fill rx ring with skbs */
983 priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
987 goto out_free_tx_skb;
990 priv->rx_desc_count = 0;
991 priv->rx_dirty_desc = 0;
992 priv->rx_curr_desc = 0;
994 /* initialize flow control buffer allocation */
995 if (priv->dma_has_sram)
996 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
997 ENETDMA_BUFALLOC_REG(priv->rx_chan));
999 enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
1000 ENETDMAC_BUFALLOC, priv->rx_chan);
1002 if (bcm_enet_refill_rx(dev)) {
1003 dev_err(kdev, "cannot allocate rx skb queue\n");
1008 /* write rx & tx ring addresses */
1009 if (priv->dma_has_sram) {
1010 enet_dmas_writel(priv, priv->rx_desc_dma,
1011 ENETDMAS_RSTART_REG, priv->rx_chan);
1012 enet_dmas_writel(priv, priv->tx_desc_dma,
1013 ENETDMAS_RSTART_REG, priv->tx_chan);
1015 enet_dmac_writel(priv, priv->rx_desc_dma,
1016 ENETDMAC_RSTART, priv->rx_chan);
1017 enet_dmac_writel(priv, priv->tx_desc_dma,
1018 ENETDMAC_RSTART, priv->tx_chan);
1021 /* clear remaining state ram for rx & tx channel */
1022 if (priv->dma_has_sram) {
1023 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
1024 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
1025 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
1026 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
1027 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
1028 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
1030 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
1031 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
1034 /* set max rx/tx length */
1035 enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
1036 enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
1038 /* set dma maximum burst len */
1039 enet_dmac_writel(priv, priv->dma_maxburst,
1040 ENETDMAC_MAXBURST, priv->rx_chan);
1041 enet_dmac_writel(priv, priv->dma_maxburst,
1042 ENETDMAC_MAXBURST, priv->tx_chan);
1044 /* set correct transmit fifo watermark */
1045 enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
1047 /* set flow control low/high threshold to 1/3 / 2/3 */
1048 if (priv->dma_has_sram) {
1049 val = priv->rx_ring_size / 3;
1050 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
1051 val = (priv->rx_ring_size * 2) / 3;
1052 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
1054 enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
1055 enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
1056 enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
1059 /* all set, enable mac and interrupts, start dma engine and
1060 * kick rx dma channel */
1062 val = enet_readl(priv, ENET_CTL_REG);
1063 val |= ENET_CTL_ENABLE_MASK;
1064 enet_writel(priv, val, ENET_CTL_REG);
1065 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
1066 enet_dmac_writel(priv, priv->dma_chan_en_mask,
1067 ENETDMAC_CHANCFG, priv->rx_chan);
1069 /* watch "mib counters about to overflow" interrupt */
1070 enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
1071 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1073 /* watch "packet transferred" interrupt in rx and tx */
1074 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1075 ENETDMAC_IR, priv->rx_chan);
1076 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1077 ENETDMAC_IR, priv->tx_chan);
1079 /* make sure we enable napi before rx interrupt */
1080 napi_enable(&priv->napi);
1082 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1083 ENETDMAC_IRMASK, priv->rx_chan);
1084 enet_dmac_writel(priv, priv->dma_chan_int_mask,
1085 ENETDMAC_IRMASK, priv->tx_chan);
1088 phy_start(priv->phydev);
1090 bcm_enet_adjust_link(dev);
1092 netif_start_queue(dev);
1096 for (i = 0; i < priv->rx_ring_size; i++) {
1097 struct bcm_enet_desc *desc;
1099 if (!priv->rx_skb[i])
1102 desc = &priv->rx_desc_cpu[i];
1103 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1105 kfree_skb(priv->rx_skb[i]);
1107 kfree(priv->rx_skb);
1110 kfree(priv->tx_skb);
1113 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1114 priv->tx_desc_cpu, priv->tx_desc_dma);
1117 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1118 priv->rx_desc_cpu, priv->rx_desc_dma);
1121 free_irq(priv->irq_tx, dev);
1124 free_irq(priv->irq_rx, dev);
1127 free_irq(dev->irq, dev);
1130 phy_disconnect(priv->phydev);
1138 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1143 val = enet_readl(priv, ENET_CTL_REG);
1144 val |= ENET_CTL_DISABLE_MASK;
1145 enet_writel(priv, val, ENET_CTL_REG);
1151 val = enet_readl(priv, ENET_CTL_REG);
1152 if (!(val & ENET_CTL_DISABLE_MASK))
1159 * disable dma in given channel
1161 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1165 enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
1171 val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
1172 if (!(val & ENETDMAC_CHANCFG_EN_MASK))
1181 static int bcm_enet_stop(struct net_device *dev)
1183 struct bcm_enet_priv *priv;
1184 struct device *kdev;
1187 priv = netdev_priv(dev);
1188 kdev = &priv->pdev->dev;
1190 netif_stop_queue(dev);
1191 napi_disable(&priv->napi);
1193 phy_stop(priv->phydev);
1194 del_timer_sync(&priv->rx_timeout);
1196 /* mask all interrupts */
1197 enet_writel(priv, 0, ENET_IRMASK_REG);
1198 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
1199 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
1201 /* make sure no mib update is scheduled */
1202 cancel_work_sync(&priv->mib_update_task);
1204 /* disable dma & mac */
1205 bcm_enet_disable_dma(priv, priv->tx_chan);
1206 bcm_enet_disable_dma(priv, priv->rx_chan);
1207 bcm_enet_disable_mac(priv);
1209 /* force reclaim of all tx buffers */
1210 bcm_enet_tx_reclaim(dev, 1);
1212 /* free the rx skb ring */
1213 for (i = 0; i < priv->rx_ring_size; i++) {
1214 struct bcm_enet_desc *desc;
1216 if (!priv->rx_skb[i])
1219 desc = &priv->rx_desc_cpu[i];
1220 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1222 kfree_skb(priv->rx_skb[i]);
1225 /* free remaining allocated memory */
1226 kfree(priv->rx_skb);
1227 kfree(priv->tx_skb);
1228 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1229 priv->rx_desc_cpu, priv->rx_desc_dma);
1230 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1231 priv->tx_desc_cpu, priv->tx_desc_dma);
1232 free_irq(priv->irq_tx, dev);
1233 free_irq(priv->irq_rx, dev);
1234 free_irq(dev->irq, dev);
1237 if (priv->has_phy) {
1238 phy_disconnect(priv->phydev);
1239 priv->phydev = NULL;
1248 struct bcm_enet_stats {
1249 char stat_string[ETH_GSTRING_LEN];
1255 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m), \
1256 offsetof(struct bcm_enet_priv, m)
1257 #define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m), \
1258 offsetof(struct net_device_stats, m)
1260 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1261 { "rx_packets", DEV_STAT(rx_packets), -1 },
1262 { "tx_packets", DEV_STAT(tx_packets), -1 },
1263 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1264 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1265 { "rx_errors", DEV_STAT(rx_errors), -1 },
1266 { "tx_errors", DEV_STAT(tx_errors), -1 },
1267 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1268 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1270 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1271 { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1272 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1273 { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1274 { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1275 { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1276 { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1277 { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1278 { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1279 { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1280 { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1281 { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1282 { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1283 { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1284 { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1285 { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1286 { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1287 { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1288 { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1289 { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1290 { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1292 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1293 { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1294 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1295 { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1296 { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1297 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1298 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1299 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1300 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1301 { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1302 { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1303 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1304 { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1305 { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1306 { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1307 { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1308 { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1309 { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1310 { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1311 { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1312 { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1313 { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1317 #define BCM_ENET_STATS_LEN ARRAY_SIZE(bcm_enet_gstrings_stats)
1319 static const u32 unused_mib_regs[] = {
1320 ETH_MIB_TX_ALL_OCTETS,
1321 ETH_MIB_TX_ALL_PKTS,
1322 ETH_MIB_RX_ALL_OCTETS,
1323 ETH_MIB_RX_ALL_PKTS,
1327 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1328 struct ethtool_drvinfo *drvinfo)
1330 strlcpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
1331 strlcpy(drvinfo->version, bcm_enet_driver_version,
1332 sizeof(drvinfo->version));
1333 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1334 strlcpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
1337 static int bcm_enet_get_sset_count(struct net_device *netdev,
1340 switch (string_set) {
1342 return BCM_ENET_STATS_LEN;
1348 static void bcm_enet_get_strings(struct net_device *netdev,
1349 u32 stringset, u8 *data)
1353 switch (stringset) {
1355 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1356 memcpy(data + i * ETH_GSTRING_LEN,
1357 bcm_enet_gstrings_stats[i].stat_string,
1364 static void update_mib_counters(struct bcm_enet_priv *priv)
1368 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1369 const struct bcm_enet_stats *s;
1373 s = &bcm_enet_gstrings_stats[i];
1374 if (s->mib_reg == -1)
1377 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1378 p = (char *)priv + s->stat_offset;
1380 if (s->sizeof_stat == sizeof(u64))
1386 /* also empty unused mib counters to make sure mib counter
1387 * overflow interrupt is cleared */
1388 for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1389 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1392 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1394 struct bcm_enet_priv *priv;
1396 priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1397 mutex_lock(&priv->mib_update_lock);
1398 update_mib_counters(priv);
1399 mutex_unlock(&priv->mib_update_lock);
1401 /* reenable mib interrupt */
1402 if (netif_running(priv->net_dev))
1403 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1406 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1407 struct ethtool_stats *stats,
1410 struct bcm_enet_priv *priv;
1413 priv = netdev_priv(netdev);
1415 mutex_lock(&priv->mib_update_lock);
1416 update_mib_counters(priv);
1418 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1419 const struct bcm_enet_stats *s;
1422 s = &bcm_enet_gstrings_stats[i];
1423 if (s->mib_reg == -1)
1424 p = (char *)&netdev->stats;
1427 p += s->stat_offset;
1428 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1429 *(u64 *)p : *(u32 *)p;
1431 mutex_unlock(&priv->mib_update_lock);
1434 static int bcm_enet_nway_reset(struct net_device *dev)
1436 struct bcm_enet_priv *priv;
1438 priv = netdev_priv(dev);
1439 if (priv->has_phy) {
1442 return genphy_restart_aneg(priv->phydev);
1448 static int bcm_enet_get_settings(struct net_device *dev,
1449 struct ethtool_cmd *cmd)
1451 struct bcm_enet_priv *priv;
1453 priv = netdev_priv(dev);
1458 if (priv->has_phy) {
1461 return phy_ethtool_gset(priv->phydev, cmd);
1464 ethtool_cmd_speed_set(cmd, ((priv->force_speed_100)
1465 ? SPEED_100 : SPEED_10));
1466 cmd->duplex = (priv->force_duplex_full) ?
1467 DUPLEX_FULL : DUPLEX_HALF;
1468 cmd->supported = ADVERTISED_10baseT_Half |
1469 ADVERTISED_10baseT_Full |
1470 ADVERTISED_100baseT_Half |
1471 ADVERTISED_100baseT_Full;
1472 cmd->advertising = 0;
1473 cmd->port = PORT_MII;
1474 cmd->transceiver = XCVR_EXTERNAL;
1479 static int bcm_enet_set_settings(struct net_device *dev,
1480 struct ethtool_cmd *cmd)
1482 struct bcm_enet_priv *priv;
1484 priv = netdev_priv(dev);
1485 if (priv->has_phy) {
1488 return phy_ethtool_sset(priv->phydev, cmd);
1492 (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1493 cmd->port != PORT_MII)
1496 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1497 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1499 if (netif_running(dev))
1500 bcm_enet_adjust_link(dev);
1505 static void bcm_enet_get_ringparam(struct net_device *dev,
1506 struct ethtool_ringparam *ering)
1508 struct bcm_enet_priv *priv;
1510 priv = netdev_priv(dev);
1512 /* rx/tx ring is actually only limited by memory */
1513 ering->rx_max_pending = 8192;
1514 ering->tx_max_pending = 8192;
1515 ering->rx_pending = priv->rx_ring_size;
1516 ering->tx_pending = priv->tx_ring_size;
1519 static int bcm_enet_set_ringparam(struct net_device *dev,
1520 struct ethtool_ringparam *ering)
1522 struct bcm_enet_priv *priv;
1525 priv = netdev_priv(dev);
1528 if (netif_running(dev)) {
1533 priv->rx_ring_size = ering->rx_pending;
1534 priv->tx_ring_size = ering->tx_pending;
1539 err = bcm_enet_open(dev);
1543 bcm_enet_set_multicast_list(dev);
1548 static void bcm_enet_get_pauseparam(struct net_device *dev,
1549 struct ethtool_pauseparam *ecmd)
1551 struct bcm_enet_priv *priv;
1553 priv = netdev_priv(dev);
1554 ecmd->autoneg = priv->pause_auto;
1555 ecmd->rx_pause = priv->pause_rx;
1556 ecmd->tx_pause = priv->pause_tx;
1559 static int bcm_enet_set_pauseparam(struct net_device *dev,
1560 struct ethtool_pauseparam *ecmd)
1562 struct bcm_enet_priv *priv;
1564 priv = netdev_priv(dev);
1566 if (priv->has_phy) {
1567 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1568 /* asymetric pause mode not supported,
1569 * actually possible but integrated PHY has RO
1574 /* no pause autoneg on direct mii connection */
1579 priv->pause_auto = ecmd->autoneg;
1580 priv->pause_rx = ecmd->rx_pause;
1581 priv->pause_tx = ecmd->tx_pause;
1586 static const struct ethtool_ops bcm_enet_ethtool_ops = {
1587 .get_strings = bcm_enet_get_strings,
1588 .get_sset_count = bcm_enet_get_sset_count,
1589 .get_ethtool_stats = bcm_enet_get_ethtool_stats,
1590 .nway_reset = bcm_enet_nway_reset,
1591 .get_settings = bcm_enet_get_settings,
1592 .set_settings = bcm_enet_set_settings,
1593 .get_drvinfo = bcm_enet_get_drvinfo,
1594 .get_link = ethtool_op_get_link,
1595 .get_ringparam = bcm_enet_get_ringparam,
1596 .set_ringparam = bcm_enet_set_ringparam,
1597 .get_pauseparam = bcm_enet_get_pauseparam,
1598 .set_pauseparam = bcm_enet_set_pauseparam,
1601 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1603 struct bcm_enet_priv *priv;
1605 priv = netdev_priv(dev);
1606 if (priv->has_phy) {
1609 return phy_mii_ioctl(priv->phydev, rq, cmd);
1611 struct mii_if_info mii;
1614 mii.mdio_read = bcm_enet_mdio_read_mii;
1615 mii.mdio_write = bcm_enet_mdio_write_mii;
1617 mii.phy_id_mask = 0x3f;
1618 mii.reg_num_mask = 0x1f;
1619 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1624 * calculate actual hardware mtu
1626 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1632 /* add ethernet header + vlan tag size */
1633 actual_mtu += VLAN_ETH_HLEN;
1635 if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1639 * setup maximum size before we get overflow mark in
1640 * descriptor, note that this will not prevent reception of
1641 * big frames, they will be split into multiple buffers
1644 priv->hw_mtu = actual_mtu;
1647 * align rx buffer size to dma burst len, account FCS since
1650 priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1651 priv->dma_maxburst * 4);
1656 * adjust mtu, can't be called while device is running
1658 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1662 if (netif_running(dev))
1665 ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1673 * preinit hardware to allow mii operation while device is down
1675 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1680 /* make sure mac is disabled */
1681 bcm_enet_disable_mac(priv);
1683 /* soft reset mac */
1684 val = ENET_CTL_SRESET_MASK;
1685 enet_writel(priv, val, ENET_CTL_REG);
1690 val = enet_readl(priv, ENET_CTL_REG);
1691 if (!(val & ENET_CTL_SRESET_MASK))
1696 /* select correct mii interface */
1697 val = enet_readl(priv, ENET_CTL_REG);
1698 if (priv->use_external_mii)
1699 val |= ENET_CTL_EPHYSEL_MASK;
1701 val &= ~ENET_CTL_EPHYSEL_MASK;
1702 enet_writel(priv, val, ENET_CTL_REG);
1704 /* turn on mdc clock */
1705 enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1706 ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1708 /* set mib counters to self-clear when read */
1709 val = enet_readl(priv, ENET_MIBCTL_REG);
1710 val |= ENET_MIBCTL_RDCLEAR_MASK;
1711 enet_writel(priv, val, ENET_MIBCTL_REG);
1714 static const struct net_device_ops bcm_enet_ops = {
1715 .ndo_open = bcm_enet_open,
1716 .ndo_stop = bcm_enet_stop,
1717 .ndo_start_xmit = bcm_enet_start_xmit,
1718 .ndo_set_mac_address = bcm_enet_set_mac_address,
1719 .ndo_set_rx_mode = bcm_enet_set_multicast_list,
1720 .ndo_do_ioctl = bcm_enet_ioctl,
1721 .ndo_change_mtu = bcm_enet_change_mtu,
1725 * allocate netdevice, request register memory and register device.
1727 static int bcm_enet_probe(struct platform_device *pdev)
1729 struct bcm_enet_priv *priv;
1730 struct net_device *dev;
1731 struct bcm63xx_enet_platform_data *pd;
1732 struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1733 struct mii_bus *bus;
1734 const char *clk_name;
1737 /* stop if shared driver failed, assume driver->probe will be
1738 * called in the same order we register devices (correct ?) */
1739 if (!bcm_enet_shared_base[0])
1742 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1743 res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1744 res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1745 if (!res_irq || !res_irq_rx || !res_irq_tx)
1749 dev = alloc_etherdev(sizeof(*priv));
1752 priv = netdev_priv(dev);
1754 priv->enet_is_sw = false;
1755 priv->dma_maxburst = BCMENET_DMA_MAXBURST;
1757 ret = compute_hw_mtu(priv, dev->mtu);
1761 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1762 priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
1763 if (IS_ERR(priv->base)) {
1764 ret = PTR_ERR(priv->base);
1768 dev->irq = priv->irq = res_irq->start;
1769 priv->irq_rx = res_irq_rx->start;
1770 priv->irq_tx = res_irq_tx->start;
1771 priv->mac_id = pdev->id;
1773 /* get rx & tx dma channel id for this mac */
1774 if (priv->mac_id == 0) {
1784 priv->mac_clk = clk_get(&pdev->dev, clk_name);
1785 if (IS_ERR(priv->mac_clk)) {
1786 ret = PTR_ERR(priv->mac_clk);
1789 clk_prepare_enable(priv->mac_clk);
1791 /* initialize default and fetch platform data */
1792 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1793 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1795 pd = dev_get_platdata(&pdev->dev);
1797 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1798 priv->has_phy = pd->has_phy;
1799 priv->phy_id = pd->phy_id;
1800 priv->has_phy_interrupt = pd->has_phy_interrupt;
1801 priv->phy_interrupt = pd->phy_interrupt;
1802 priv->use_external_mii = !pd->use_internal_phy;
1803 priv->pause_auto = pd->pause_auto;
1804 priv->pause_rx = pd->pause_rx;
1805 priv->pause_tx = pd->pause_tx;
1806 priv->force_duplex_full = pd->force_duplex_full;
1807 priv->force_speed_100 = pd->force_speed_100;
1808 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
1809 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
1810 priv->dma_chan_width = pd->dma_chan_width;
1811 priv->dma_has_sram = pd->dma_has_sram;
1812 priv->dma_desc_shift = pd->dma_desc_shift;
1815 if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1816 /* using internal PHY, enable clock */
1817 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1818 if (IS_ERR(priv->phy_clk)) {
1819 ret = PTR_ERR(priv->phy_clk);
1820 priv->phy_clk = NULL;
1821 goto out_put_clk_mac;
1823 clk_prepare_enable(priv->phy_clk);
1826 /* do minimal hardware init to be able to probe mii bus */
1827 bcm_enet_hw_preinit(priv);
1829 /* MII bus registration */
1830 if (priv->has_phy) {
1832 priv->mii_bus = mdiobus_alloc();
1833 if (!priv->mii_bus) {
1838 bus = priv->mii_bus;
1839 bus->name = "bcm63xx_enet MII bus";
1840 bus->parent = &pdev->dev;
1842 bus->read = bcm_enet_mdio_read_phylib;
1843 bus->write = bcm_enet_mdio_write_phylib;
1844 sprintf(bus->id, "%s-%d", pdev->name, priv->mac_id);
1846 /* only probe bus where we think the PHY is, because
1847 * the mdio read operation return 0 instead of 0xffff
1848 * if a slave is not present on hw */
1849 bus->phy_mask = ~(1 << priv->phy_id);
1851 if (priv->has_phy_interrupt)
1852 bus->irq[priv->phy_id] = priv->phy_interrupt;
1854 ret = mdiobus_register(bus);
1856 dev_err(&pdev->dev, "unable to register mdio bus\n");
1861 /* run platform code to initialize PHY device */
1862 if (pd->mii_config &&
1863 pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1864 bcm_enet_mdio_write_mii)) {
1865 dev_err(&pdev->dev, "unable to configure mdio bus\n");
1870 spin_lock_init(&priv->rx_lock);
1872 /* init rx timeout (used for oom) */
1873 init_timer(&priv->rx_timeout);
1874 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1875 priv->rx_timeout.data = (unsigned long)dev;
1877 /* init the mib update lock&work */
1878 mutex_init(&priv->mib_update_lock);
1879 INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1881 /* zero mib counters */
1882 for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1883 enet_writel(priv, 0, ENET_MIB_REG(i));
1885 /* register netdevice */
1886 dev->netdev_ops = &bcm_enet_ops;
1887 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1889 dev->ethtool_ops = &bcm_enet_ethtool_ops;
1890 SET_NETDEV_DEV(dev, &pdev->dev);
1892 ret = register_netdev(dev);
1894 goto out_unregister_mdio;
1896 netif_carrier_off(dev);
1897 platform_set_drvdata(pdev, dev);
1899 priv->net_dev = dev;
1903 out_unregister_mdio:
1905 mdiobus_unregister(priv->mii_bus);
1909 mdiobus_free(priv->mii_bus);
1912 /* turn off mdc clock */
1913 enet_writel(priv, 0, ENET_MIISC_REG);
1914 if (priv->phy_clk) {
1915 clk_disable_unprepare(priv->phy_clk);
1916 clk_put(priv->phy_clk);
1920 clk_disable_unprepare(priv->mac_clk);
1921 clk_put(priv->mac_clk);
1929 * exit func, stops hardware and unregisters netdevice
1931 static int bcm_enet_remove(struct platform_device *pdev)
1933 struct bcm_enet_priv *priv;
1934 struct net_device *dev;
1936 /* stop netdevice */
1937 dev = platform_get_drvdata(pdev);
1938 priv = netdev_priv(dev);
1939 unregister_netdev(dev);
1941 /* turn off mdc clock */
1942 enet_writel(priv, 0, ENET_MIISC_REG);
1944 if (priv->has_phy) {
1945 mdiobus_unregister(priv->mii_bus);
1946 mdiobus_free(priv->mii_bus);
1948 struct bcm63xx_enet_platform_data *pd;
1950 pd = dev_get_platdata(&pdev->dev);
1951 if (pd && pd->mii_config)
1952 pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1953 bcm_enet_mdio_write_mii);
1956 /* disable hw block clocks */
1957 if (priv->phy_clk) {
1958 clk_disable_unprepare(priv->phy_clk);
1959 clk_put(priv->phy_clk);
1961 clk_disable_unprepare(priv->mac_clk);
1962 clk_put(priv->mac_clk);
1968 struct platform_driver bcm63xx_enet_driver = {
1969 .probe = bcm_enet_probe,
1970 .remove = bcm_enet_remove,
1972 .name = "bcm63xx_enet",
1973 .owner = THIS_MODULE,
1978 * switch mii access callbacks
1980 static int bcmenet_sw_mdio_read(struct bcm_enet_priv *priv,
1981 int ext, int phy_id, int location)
1986 spin_lock_bh(&priv->enetsw_mdio_lock);
1987 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
1989 reg = ENETSW_MDIOC_RD_MASK |
1990 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
1991 (location << ENETSW_MDIOC_REG_SHIFT);
1994 reg |= ENETSW_MDIOC_EXT_MASK;
1996 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
1998 ret = enetsw_readw(priv, ENETSW_MDIOD_REG);
1999 spin_unlock_bh(&priv->enetsw_mdio_lock);
2003 static void bcmenet_sw_mdio_write(struct bcm_enet_priv *priv,
2004 int ext, int phy_id, int location,
2009 spin_lock_bh(&priv->enetsw_mdio_lock);
2010 enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
2012 reg = ENETSW_MDIOC_WR_MASK |
2013 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
2014 (location << ENETSW_MDIOC_REG_SHIFT);
2017 reg |= ENETSW_MDIOC_EXT_MASK;
2021 enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
2023 spin_unlock_bh(&priv->enetsw_mdio_lock);
2026 static inline int bcm_enet_port_is_rgmii(int portid)
2028 return portid >= ENETSW_RGMII_PORT0;
2032 * enet sw PHY polling
2034 static void swphy_poll_timer(unsigned long data)
2036 struct bcm_enet_priv *priv = (struct bcm_enet_priv *)data;
2039 for (i = 0; i < priv->num_ports; i++) {
2040 struct bcm63xx_enetsw_port *port;
2041 int val, j, up, advertise, lpa, speed, duplex, media;
2042 int external_phy = bcm_enet_port_is_rgmii(i);
2045 port = &priv->used_ports[i];
2049 if (port->bypass_link)
2052 /* dummy read to clear */
2053 for (j = 0; j < 2; j++)
2054 val = bcmenet_sw_mdio_read(priv, external_phy,
2055 port->phy_id, MII_BMSR);
2060 up = (val & BMSR_LSTATUS) ? 1 : 0;
2061 if (!(up ^ priv->sw_port_link[i]))
2064 priv->sw_port_link[i] = up;
2068 dev_info(&priv->pdev->dev, "link DOWN on %s\n",
2070 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2071 ENETSW_PORTOV_REG(i));
2072 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2073 ENETSW_PTCTRL_TXDIS_MASK,
2074 ENETSW_PTCTRL_REG(i));
2078 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2079 port->phy_id, MII_ADVERTISE);
2081 lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
2084 /* figure out media and duplex from advertise and LPA values */
2085 media = mii_nway_result(lpa & advertise);
2086 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
2088 if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
2093 if (val & BMSR_ESTATEN) {
2094 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2095 port->phy_id, MII_CTRL1000);
2097 lpa = bcmenet_sw_mdio_read(priv, external_phy,
2098 port->phy_id, MII_STAT1000);
2100 if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
2101 && lpa & (LPA_1000FULL | LPA_1000HALF)) {
2103 duplex = (lpa & LPA_1000FULL);
2107 dev_info(&priv->pdev->dev,
2108 "link UP on %s, %dMbps, %s-duplex\n",
2109 port->name, speed, duplex ? "full" : "half");
2111 override = ENETSW_PORTOV_ENABLE_MASK |
2112 ENETSW_PORTOV_LINKUP_MASK;
2115 override |= ENETSW_IMPOV_1000_MASK;
2116 else if (speed == 100)
2117 override |= ENETSW_IMPOV_100_MASK;
2119 override |= ENETSW_IMPOV_FDX_MASK;
2121 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2122 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2125 priv->swphy_poll.expires = jiffies + HZ;
2126 add_timer(&priv->swphy_poll);
2130 * open callback, allocate dma rings & buffers and start rx operation
2132 static int bcm_enetsw_open(struct net_device *dev)
2134 struct bcm_enet_priv *priv;
2135 struct device *kdev;
2141 priv = netdev_priv(dev);
2142 kdev = &priv->pdev->dev;
2144 /* mask all interrupts and request them */
2145 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2146 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2148 ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
2153 if (priv->irq_tx != -1) {
2154 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
2157 goto out_freeirq_rx;
2160 /* allocate rx dma ring */
2161 size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
2162 p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
2164 dev_err(kdev, "cannot allocate rx ring %u\n", size);
2166 goto out_freeirq_tx;
2170 priv->rx_desc_alloc_size = size;
2171 priv->rx_desc_cpu = p;
2173 /* allocate tx dma ring */
2174 size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
2175 p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
2177 dev_err(kdev, "cannot allocate tx ring\n");
2179 goto out_free_rx_ring;
2183 priv->tx_desc_alloc_size = size;
2184 priv->tx_desc_cpu = p;
2186 priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
2188 if (!priv->tx_skb) {
2189 dev_err(kdev, "cannot allocate rx skb queue\n");
2191 goto out_free_tx_ring;
2194 priv->tx_desc_count = priv->tx_ring_size;
2195 priv->tx_dirty_desc = 0;
2196 priv->tx_curr_desc = 0;
2197 spin_lock_init(&priv->tx_lock);
2199 /* init & fill rx ring with skbs */
2200 priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
2202 if (!priv->rx_skb) {
2203 dev_err(kdev, "cannot allocate rx skb queue\n");
2205 goto out_free_tx_skb;
2208 priv->rx_desc_count = 0;
2209 priv->rx_dirty_desc = 0;
2210 priv->rx_curr_desc = 0;
2212 /* disable all ports */
2213 for (i = 0; i < priv->num_ports; i++) {
2214 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2215 ENETSW_PORTOV_REG(i));
2216 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2217 ENETSW_PTCTRL_TXDIS_MASK,
2218 ENETSW_PTCTRL_REG(i));
2220 priv->sw_port_link[i] = 0;
2224 val = enetsw_readb(priv, ENETSW_GMCR_REG);
2225 val |= ENETSW_GMCR_RST_MIB_MASK;
2226 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2228 val &= ~ENETSW_GMCR_RST_MIB_MASK;
2229 enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2232 /* force CPU port state */
2233 val = enetsw_readb(priv, ENETSW_IMPOV_REG);
2234 val |= ENETSW_IMPOV_FORCE_MASK | ENETSW_IMPOV_LINKUP_MASK;
2235 enetsw_writeb(priv, val, ENETSW_IMPOV_REG);
2237 /* enable switch forward engine */
2238 val = enetsw_readb(priv, ENETSW_SWMODE_REG);
2239 val |= ENETSW_SWMODE_FWD_EN_MASK;
2240 enetsw_writeb(priv, val, ENETSW_SWMODE_REG);
2242 /* enable jumbo on all ports */
2243 enetsw_writel(priv, 0x1ff, ENETSW_JMBCTL_PORT_REG);
2244 enetsw_writew(priv, 9728, ENETSW_JMBCTL_MAXSIZE_REG);
2246 /* initialize flow control buffer allocation */
2247 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
2248 ENETDMA_BUFALLOC_REG(priv->rx_chan));
2250 if (bcm_enet_refill_rx(dev)) {
2251 dev_err(kdev, "cannot allocate rx skb queue\n");
2256 /* write rx & tx ring addresses */
2257 enet_dmas_writel(priv, priv->rx_desc_dma,
2258 ENETDMAS_RSTART_REG, priv->rx_chan);
2259 enet_dmas_writel(priv, priv->tx_desc_dma,
2260 ENETDMAS_RSTART_REG, priv->tx_chan);
2262 /* clear remaining state ram for rx & tx channel */
2263 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
2264 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
2265 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
2266 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
2267 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
2268 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
2270 /* set dma maximum burst len */
2271 enet_dmac_writel(priv, priv->dma_maxburst,
2272 ENETDMAC_MAXBURST, priv->rx_chan);
2273 enet_dmac_writel(priv, priv->dma_maxburst,
2274 ENETDMAC_MAXBURST, priv->tx_chan);
2276 /* set flow control low/high threshold to 1/3 / 2/3 */
2277 val = priv->rx_ring_size / 3;
2278 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
2279 val = (priv->rx_ring_size * 2) / 3;
2280 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
2282 /* all set, enable mac and interrupts, start dma engine and
2283 * kick rx dma channel
2286 enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
2287 enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
2288 ENETDMAC_CHANCFG, priv->rx_chan);
2290 /* watch "packet transferred" interrupt in rx and tx */
2291 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2292 ENETDMAC_IR, priv->rx_chan);
2293 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2294 ENETDMAC_IR, priv->tx_chan);
2296 /* make sure we enable napi before rx interrupt */
2297 napi_enable(&priv->napi);
2299 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2300 ENETDMAC_IRMASK, priv->rx_chan);
2301 enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2302 ENETDMAC_IRMASK, priv->tx_chan);
2304 netif_carrier_on(dev);
2305 netif_start_queue(dev);
2307 /* apply override config for bypass_link ports here. */
2308 for (i = 0; i < priv->num_ports; i++) {
2309 struct bcm63xx_enetsw_port *port;
2311 port = &priv->used_ports[i];
2315 if (!port->bypass_link)
2318 override = ENETSW_PORTOV_ENABLE_MASK |
2319 ENETSW_PORTOV_LINKUP_MASK;
2321 switch (port->force_speed) {
2323 override |= ENETSW_IMPOV_1000_MASK;
2326 override |= ENETSW_IMPOV_100_MASK;
2331 pr_warn("invalid forced speed on port %s: assume 10\n",
2336 if (port->force_duplex_full)
2337 override |= ENETSW_IMPOV_FDX_MASK;
2340 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2341 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2344 /* start phy polling timer */
2345 init_timer(&priv->swphy_poll);
2346 priv->swphy_poll.function = swphy_poll_timer;
2347 priv->swphy_poll.data = (unsigned long)priv;
2348 priv->swphy_poll.expires = jiffies;
2349 add_timer(&priv->swphy_poll);
2353 for (i = 0; i < priv->rx_ring_size; i++) {
2354 struct bcm_enet_desc *desc;
2356 if (!priv->rx_skb[i])
2359 desc = &priv->rx_desc_cpu[i];
2360 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2362 kfree_skb(priv->rx_skb[i]);
2364 kfree(priv->rx_skb);
2367 kfree(priv->tx_skb);
2370 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2371 priv->tx_desc_cpu, priv->tx_desc_dma);
2374 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2375 priv->rx_desc_cpu, priv->rx_desc_dma);
2378 if (priv->irq_tx != -1)
2379 free_irq(priv->irq_tx, dev);
2382 free_irq(priv->irq_rx, dev);
2389 static int bcm_enetsw_stop(struct net_device *dev)
2391 struct bcm_enet_priv *priv;
2392 struct device *kdev;
2395 priv = netdev_priv(dev);
2396 kdev = &priv->pdev->dev;
2398 del_timer_sync(&priv->swphy_poll);
2399 netif_stop_queue(dev);
2400 napi_disable(&priv->napi);
2401 del_timer_sync(&priv->rx_timeout);
2403 /* mask all interrupts */
2404 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2405 enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2407 /* disable dma & mac */
2408 bcm_enet_disable_dma(priv, priv->tx_chan);
2409 bcm_enet_disable_dma(priv, priv->rx_chan);
2411 /* force reclaim of all tx buffers */
2412 bcm_enet_tx_reclaim(dev, 1);
2414 /* free the rx skb ring */
2415 for (i = 0; i < priv->rx_ring_size; i++) {
2416 struct bcm_enet_desc *desc;
2418 if (!priv->rx_skb[i])
2421 desc = &priv->rx_desc_cpu[i];
2422 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2424 kfree_skb(priv->rx_skb[i]);
2427 /* free remaining allocated memory */
2428 kfree(priv->rx_skb);
2429 kfree(priv->tx_skb);
2430 dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2431 priv->rx_desc_cpu, priv->rx_desc_dma);
2432 dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2433 priv->tx_desc_cpu, priv->tx_desc_dma);
2434 if (priv->irq_tx != -1)
2435 free_irq(priv->irq_tx, dev);
2436 free_irq(priv->irq_rx, dev);
2441 /* try to sort out phy external status by walking the used_port field
2442 * in the bcm_enet_priv structure. in case the phy address is not
2443 * assigned to any physical port on the switch, assume it is external
2444 * (and yell at the user).
2446 static int bcm_enetsw_phy_is_external(struct bcm_enet_priv *priv, int phy_id)
2450 for (i = 0; i < priv->num_ports; ++i) {
2451 if (!priv->used_ports[i].used)
2453 if (priv->used_ports[i].phy_id == phy_id)
2454 return bcm_enet_port_is_rgmii(i);
2457 printk_once(KERN_WARNING "bcm63xx_enet: could not find a used port with phy_id %i, assuming phy is external\n",
2462 /* can't use bcmenet_sw_mdio_read directly as we need to sort out
2463 * external/internal status of the given phy_id first.
2465 static int bcm_enetsw_mii_mdio_read(struct net_device *dev, int phy_id,
2468 struct bcm_enet_priv *priv;
2470 priv = netdev_priv(dev);
2471 return bcmenet_sw_mdio_read(priv,
2472 bcm_enetsw_phy_is_external(priv, phy_id),
2476 /* can't use bcmenet_sw_mdio_write directly as we need to sort out
2477 * external/internal status of the given phy_id first.
2479 static void bcm_enetsw_mii_mdio_write(struct net_device *dev, int phy_id,
2483 struct bcm_enet_priv *priv;
2485 priv = netdev_priv(dev);
2486 bcmenet_sw_mdio_write(priv, bcm_enetsw_phy_is_external(priv, phy_id),
2487 phy_id, location, val);
2490 static int bcm_enetsw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2492 struct mii_if_info mii;
2495 mii.mdio_read = bcm_enetsw_mii_mdio_read;
2496 mii.mdio_write = bcm_enetsw_mii_mdio_write;
2498 mii.phy_id_mask = 0x3f;
2499 mii.reg_num_mask = 0x1f;
2500 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
2504 static const struct net_device_ops bcm_enetsw_ops = {
2505 .ndo_open = bcm_enetsw_open,
2506 .ndo_stop = bcm_enetsw_stop,
2507 .ndo_start_xmit = bcm_enet_start_xmit,
2508 .ndo_change_mtu = bcm_enet_change_mtu,
2509 .ndo_do_ioctl = bcm_enetsw_ioctl,
2513 static const struct bcm_enet_stats bcm_enetsw_gstrings_stats[] = {
2514 { "rx_packets", DEV_STAT(rx_packets), -1 },
2515 { "tx_packets", DEV_STAT(tx_packets), -1 },
2516 { "rx_bytes", DEV_STAT(rx_bytes), -1 },
2517 { "tx_bytes", DEV_STAT(tx_bytes), -1 },
2518 { "rx_errors", DEV_STAT(rx_errors), -1 },
2519 { "tx_errors", DEV_STAT(tx_errors), -1 },
2520 { "rx_dropped", DEV_STAT(rx_dropped), -1 },
2521 { "tx_dropped", DEV_STAT(tx_dropped), -1 },
2523 { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETHSW_MIB_RX_GD_OCT },
2524 { "tx_unicast", GEN_STAT(mib.tx_unicast), ETHSW_MIB_RX_BRDCAST },
2525 { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETHSW_MIB_RX_BRDCAST },
2526 { "tx_multicast", GEN_STAT(mib.tx_mult), ETHSW_MIB_RX_MULT },
2527 { "tx_64_octets", GEN_STAT(mib.tx_64), ETHSW_MIB_RX_64 },
2528 { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETHSW_MIB_RX_65_127 },
2529 { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETHSW_MIB_RX_128_255 },
2530 { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETHSW_MIB_RX_256_511 },
2531 { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETHSW_MIB_RX_512_1023},
2532 { "tx_1024_1522_oct", GEN_STAT(mib.tx_1024_max),
2533 ETHSW_MIB_RX_1024_1522 },
2534 { "tx_1523_2047_oct", GEN_STAT(mib.tx_1523_2047),
2535 ETHSW_MIB_RX_1523_2047 },
2536 { "tx_2048_4095_oct", GEN_STAT(mib.tx_2048_4095),
2537 ETHSW_MIB_RX_2048_4095 },
2538 { "tx_4096_8191_oct", GEN_STAT(mib.tx_4096_8191),
2539 ETHSW_MIB_RX_4096_8191 },
2540 { "tx_8192_9728_oct", GEN_STAT(mib.tx_8192_9728),
2541 ETHSW_MIB_RX_8192_9728 },
2542 { "tx_oversize", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR },
2543 { "tx_oversize_drop", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR_DISC },
2544 { "tx_dropped", GEN_STAT(mib.tx_drop), ETHSW_MIB_RX_DROP },
2545 { "tx_undersize", GEN_STAT(mib.tx_underrun), ETHSW_MIB_RX_UND },
2546 { "tx_pause", GEN_STAT(mib.tx_pause), ETHSW_MIB_RX_PAUSE },
2548 { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETHSW_MIB_TX_ALL_OCT },
2549 { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETHSW_MIB_TX_BRDCAST },
2550 { "rx_multicast", GEN_STAT(mib.rx_mult), ETHSW_MIB_TX_MULT },
2551 { "rx_unicast", GEN_STAT(mib.rx_unicast), ETHSW_MIB_TX_MULT },
2552 { "rx_pause", GEN_STAT(mib.rx_pause), ETHSW_MIB_TX_PAUSE },
2553 { "rx_dropped", GEN_STAT(mib.rx_drop), ETHSW_MIB_TX_DROP_PKTS },
2557 #define BCM_ENETSW_STATS_LEN \
2558 (sizeof(bcm_enetsw_gstrings_stats) / sizeof(struct bcm_enet_stats))
2560 static void bcm_enetsw_get_strings(struct net_device *netdev,
2561 u32 stringset, u8 *data)
2565 switch (stringset) {
2567 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2568 memcpy(data + i * ETH_GSTRING_LEN,
2569 bcm_enetsw_gstrings_stats[i].stat_string,
2576 static int bcm_enetsw_get_sset_count(struct net_device *netdev,
2579 switch (string_set) {
2581 return BCM_ENETSW_STATS_LEN;
2587 static void bcm_enetsw_get_drvinfo(struct net_device *netdev,
2588 struct ethtool_drvinfo *drvinfo)
2590 strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
2591 strncpy(drvinfo->version, bcm_enet_driver_version, 32);
2592 strncpy(drvinfo->fw_version, "N/A", 32);
2593 strncpy(drvinfo->bus_info, "bcm63xx", 32);
2596 static void bcm_enetsw_get_ethtool_stats(struct net_device *netdev,
2597 struct ethtool_stats *stats,
2600 struct bcm_enet_priv *priv;
2603 priv = netdev_priv(netdev);
2605 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2606 const struct bcm_enet_stats *s;
2611 s = &bcm_enetsw_gstrings_stats[i];
2617 lo = enetsw_readl(priv, ENETSW_MIB_REG(reg));
2618 p = (char *)priv + s->stat_offset;
2620 if (s->sizeof_stat == sizeof(u64)) {
2621 hi = enetsw_readl(priv, ENETSW_MIB_REG(reg + 1));
2622 *(u64 *)p = ((u64)hi << 32 | lo);
2628 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2629 const struct bcm_enet_stats *s;
2632 s = &bcm_enetsw_gstrings_stats[i];
2634 if (s->mib_reg == -1)
2635 p = (char *)&netdev->stats + s->stat_offset;
2637 p = (char *)priv + s->stat_offset;
2639 data[i] = (s->sizeof_stat == sizeof(u64)) ?
2640 *(u64 *)p : *(u32 *)p;
2644 static void bcm_enetsw_get_ringparam(struct net_device *dev,
2645 struct ethtool_ringparam *ering)
2647 struct bcm_enet_priv *priv;
2649 priv = netdev_priv(dev);
2651 /* rx/tx ring is actually only limited by memory */
2652 ering->rx_max_pending = 8192;
2653 ering->tx_max_pending = 8192;
2654 ering->rx_mini_max_pending = 0;
2655 ering->rx_jumbo_max_pending = 0;
2656 ering->rx_pending = priv->rx_ring_size;
2657 ering->tx_pending = priv->tx_ring_size;
2660 static int bcm_enetsw_set_ringparam(struct net_device *dev,
2661 struct ethtool_ringparam *ering)
2663 struct bcm_enet_priv *priv;
2666 priv = netdev_priv(dev);
2669 if (netif_running(dev)) {
2670 bcm_enetsw_stop(dev);
2674 priv->rx_ring_size = ering->rx_pending;
2675 priv->tx_ring_size = ering->tx_pending;
2680 err = bcm_enetsw_open(dev);
2687 static struct ethtool_ops bcm_enetsw_ethtool_ops = {
2688 .get_strings = bcm_enetsw_get_strings,
2689 .get_sset_count = bcm_enetsw_get_sset_count,
2690 .get_ethtool_stats = bcm_enetsw_get_ethtool_stats,
2691 .get_drvinfo = bcm_enetsw_get_drvinfo,
2692 .get_ringparam = bcm_enetsw_get_ringparam,
2693 .set_ringparam = bcm_enetsw_set_ringparam,
2696 /* allocate netdevice, request register memory and register device. */
2697 static int bcm_enetsw_probe(struct platform_device *pdev)
2699 struct bcm_enet_priv *priv;
2700 struct net_device *dev;
2701 struct bcm63xx_enetsw_platform_data *pd;
2702 struct resource *res_mem;
2703 int ret, irq_rx, irq_tx;
2705 /* stop if shared driver failed, assume driver->probe will be
2706 * called in the same order we register devices (correct ?)
2708 if (!bcm_enet_shared_base[0])
2711 res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2712 irq_rx = platform_get_irq(pdev, 0);
2713 irq_tx = platform_get_irq(pdev, 1);
2714 if (!res_mem || irq_rx < 0)
2718 dev = alloc_etherdev(sizeof(*priv));
2721 priv = netdev_priv(dev);
2722 memset(priv, 0, sizeof(*priv));
2724 /* initialize default and fetch platform data */
2725 priv->enet_is_sw = true;
2726 priv->irq_rx = irq_rx;
2727 priv->irq_tx = irq_tx;
2728 priv->rx_ring_size = BCMENET_DEF_RX_DESC;
2729 priv->tx_ring_size = BCMENET_DEF_TX_DESC;
2730 priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
2732 pd = dev_get_platdata(&pdev->dev);
2734 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2735 memcpy(priv->used_ports, pd->used_ports,
2736 sizeof(pd->used_ports));
2737 priv->num_ports = pd->num_ports;
2738 priv->dma_has_sram = pd->dma_has_sram;
2739 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
2740 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
2741 priv->dma_chan_width = pd->dma_chan_width;
2744 ret = compute_hw_mtu(priv, dev->mtu);
2748 if (!request_mem_region(res_mem->start, resource_size(res_mem),
2749 "bcm63xx_enetsw")) {
2754 priv->base = ioremap(res_mem->start, resource_size(res_mem));
2755 if (priv->base == NULL) {
2757 goto out_release_mem;
2760 priv->mac_clk = clk_get(&pdev->dev, "enetsw");
2761 if (IS_ERR(priv->mac_clk)) {
2762 ret = PTR_ERR(priv->mac_clk);
2765 clk_enable(priv->mac_clk);
2769 spin_lock_init(&priv->rx_lock);
2771 /* init rx timeout (used for oom) */
2772 init_timer(&priv->rx_timeout);
2773 priv->rx_timeout.function = bcm_enet_refill_rx_timer;
2774 priv->rx_timeout.data = (unsigned long)dev;
2776 /* register netdevice */
2777 dev->netdev_ops = &bcm_enetsw_ops;
2778 netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
2779 dev->ethtool_ops = &bcm_enetsw_ethtool_ops;
2780 SET_NETDEV_DEV(dev, &pdev->dev);
2782 spin_lock_init(&priv->enetsw_mdio_lock);
2784 ret = register_netdev(dev);
2788 netif_carrier_off(dev);
2789 platform_set_drvdata(pdev, dev);
2791 priv->net_dev = dev;
2796 clk_put(priv->mac_clk);
2799 iounmap(priv->base);
2802 release_mem_region(res_mem->start, resource_size(res_mem));
2809 /* exit func, stops hardware and unregisters netdevice */
2810 static int bcm_enetsw_remove(struct platform_device *pdev)
2812 struct bcm_enet_priv *priv;
2813 struct net_device *dev;
2814 struct resource *res;
2816 /* stop netdevice */
2817 dev = platform_get_drvdata(pdev);
2818 priv = netdev_priv(dev);
2819 unregister_netdev(dev);
2821 /* release device resources */
2822 iounmap(priv->base);
2823 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2824 release_mem_region(res->start, resource_size(res));
2830 struct platform_driver bcm63xx_enetsw_driver = {
2831 .probe = bcm_enetsw_probe,
2832 .remove = bcm_enetsw_remove,
2834 .name = "bcm63xx_enetsw",
2835 .owner = THIS_MODULE,
2839 /* reserve & remap memory space shared between all macs */
2840 static int bcm_enet_shared_probe(struct platform_device *pdev)
2842 struct resource *res;
2846 memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
2848 for (i = 0; i < 3; i++) {
2849 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
2850 p[i] = devm_ioremap_resource(&pdev->dev, res);
2852 return PTR_ERR(p[i]);
2855 memcpy(bcm_enet_shared_base, p, sizeof(bcm_enet_shared_base));
2860 static int bcm_enet_shared_remove(struct platform_device *pdev)
2865 /* this "shared" driver is needed because both macs share a single
2868 struct platform_driver bcm63xx_enet_shared_driver = {
2869 .probe = bcm_enet_shared_probe,
2870 .remove = bcm_enet_shared_remove,
2872 .name = "bcm63xx_enet_shared",
2873 .owner = THIS_MODULE,
2877 static struct platform_driver * const drivers[] = {
2878 &bcm63xx_enet_shared_driver,
2879 &bcm63xx_enet_driver,
2880 &bcm63xx_enetsw_driver,
2884 static int __init bcm_enet_init(void)
2886 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
2889 static void __exit bcm_enet_exit(void)
2891 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
2895 module_init(bcm_enet_init);
2896 module_exit(bcm_enet_exit);
2898 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
2899 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
2900 MODULE_LICENSE("GPL");