1 /* drivers/net/ethernet/freescale/gianfar.c
3 * Gianfar Ethernet Driver
4 * This driver is designed for the non-CPM ethernet controllers
5 * on the 85xx and 83xx family of integrated processors
6 * Based on 8260_io/fcc_enet.c
9 * Maintainer: Kumar Gala
10 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
12 * Copyright 2002-2009, 2011 Freescale Semiconductor, Inc.
13 * Copyright 2007 MontaVista Software, Inc.
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
20 * Gianfar: AKA Lambda Draconis, "Dragon"
28 * The driver is initialized through of_device. Configuration information
29 * is therefore conveyed through an OF-style device tree.
31 * The Gianfar Ethernet Controller uses a ring of buffer
32 * descriptors. The beginning is indicated by a register
33 * pointing to the physical address of the start of the ring.
34 * The end is determined by a "wrap" bit being set in the
35 * last descriptor of the ring.
37 * When a packet is received, the RXF bit in the
38 * IEVENT register is set, triggering an interrupt when the
39 * corresponding bit in the IMASK register is also set (if
40 * interrupt coalescing is active, then the interrupt may not
41 * happen immediately, but will wait until either a set number
42 * of frames or amount of time have passed). In NAPI, the
43 * interrupt handler will signal there is work to be done, and
44 * exit. This method will start at the last known empty
45 * descriptor, and process every subsequent descriptor until there
46 * are none left with data (NAPI will stop after a set number of
47 * packets to give time to other tasks, but will eventually
48 * process all the packets). The data arrives inside a
49 * pre-allocated skb, and so after the skb is passed up to the
50 * stack, a new skb must be allocated, and the address field in
51 * the buffer descriptor must be updated to indicate this new
54 * When the kernel requests that a packet be transmitted, the
55 * driver starts where it left off last time, and points the
56 * descriptor at the buffer which was passed in. The driver
57 * then informs the DMA engine that there are packets ready to
58 * be transmitted. Once the controller is finished transmitting
59 * the packet, an interrupt may be triggered (under the same
60 * conditions as for reception, but depending on the TXF bit).
61 * The driver then cleans up the buffer.
64 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
67 #include <linux/kernel.h>
68 #include <linux/string.h>
69 #include <linux/errno.h>
70 #include <linux/unistd.h>
71 #include <linux/slab.h>
72 #include <linux/interrupt.h>
73 #include <linux/init.h>
74 #include <linux/delay.h>
75 #include <linux/netdevice.h>
76 #include <linux/etherdevice.h>
77 #include <linux/skbuff.h>
78 #include <linux/if_vlan.h>
79 #include <linux/spinlock.h>
81 #include <linux/of_mdio.h>
82 #include <linux/of_platform.h>
84 #include <linux/tcp.h>
85 #include <linux/udp.h>
87 #include <linux/net_tstamp.h>
92 #include <asm/uaccess.h>
93 #include <linux/module.h>
94 #include <linux/dma-mapping.h>
95 #include <linux/crc32.h>
96 #include <linux/mii.h>
97 #include <linux/phy.h>
98 #include <linux/phy_fixed.h>
100 #include <linux/of_net.h>
104 #define TX_TIMEOUT (1*HZ)
106 const char gfar_driver_version[] = "1.3";
108 static int gfar_enet_open(struct net_device *dev);
109 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
110 static void gfar_reset_task(struct work_struct *work);
111 static void gfar_timeout(struct net_device *dev);
112 static int gfar_close(struct net_device *dev);
113 struct sk_buff *gfar_new_skb(struct net_device *dev);
114 static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
115 struct sk_buff *skb);
116 static int gfar_set_mac_address(struct net_device *dev);
117 static int gfar_change_mtu(struct net_device *dev, int new_mtu);
118 static irqreturn_t gfar_error(int irq, void *dev_id);
119 static irqreturn_t gfar_transmit(int irq, void *dev_id);
120 static irqreturn_t gfar_interrupt(int irq, void *dev_id);
121 static void adjust_link(struct net_device *dev);
122 static void init_registers(struct net_device *dev);
123 static int init_phy(struct net_device *dev);
124 static int gfar_probe(struct platform_device *ofdev);
125 static int gfar_remove(struct platform_device *ofdev);
126 static void free_skb_resources(struct gfar_private *priv);
127 static void gfar_set_multi(struct net_device *dev);
128 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
129 static void gfar_configure_serdes(struct net_device *dev);
130 static int gfar_poll(struct napi_struct *napi, int budget);
131 #ifdef CONFIG_NET_POLL_CONTROLLER
132 static void gfar_netpoll(struct net_device *dev);
134 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
135 static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
136 static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
137 int amount_pull, struct napi_struct *napi);
138 void gfar_halt(struct net_device *dev);
139 static void gfar_halt_nodisable(struct net_device *dev);
140 void gfar_start(struct net_device *dev);
141 static void gfar_clear_exact_match(struct net_device *dev);
142 static void gfar_set_mac_for_addr(struct net_device *dev, int num,
144 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
146 MODULE_AUTHOR("Freescale Semiconductor, Inc");
147 MODULE_DESCRIPTION("Gianfar Ethernet Driver");
148 MODULE_LICENSE("GPL");
150 static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
157 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
158 if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1)
159 lstatus |= BD_LFLAG(RXBD_WRAP);
163 bdp->lstatus = lstatus;
166 static int gfar_init_bds(struct net_device *ndev)
168 struct gfar_private *priv = netdev_priv(ndev);
169 struct gfar_priv_tx_q *tx_queue = NULL;
170 struct gfar_priv_rx_q *rx_queue = NULL;
175 for (i = 0; i < priv->num_tx_queues; i++) {
176 tx_queue = priv->tx_queue[i];
177 /* Initialize some variables in our dev structure */
178 tx_queue->num_txbdfree = tx_queue->tx_ring_size;
179 tx_queue->dirty_tx = tx_queue->tx_bd_base;
180 tx_queue->cur_tx = tx_queue->tx_bd_base;
181 tx_queue->skb_curtx = 0;
182 tx_queue->skb_dirtytx = 0;
184 /* Initialize Transmit Descriptor Ring */
185 txbdp = tx_queue->tx_bd_base;
186 for (j = 0; j < tx_queue->tx_ring_size; j++) {
192 /* Set the last descriptor in the ring to indicate wrap */
194 txbdp->status |= TXBD_WRAP;
197 for (i = 0; i < priv->num_rx_queues; i++) {
198 rx_queue = priv->rx_queue[i];
199 rx_queue->cur_rx = rx_queue->rx_bd_base;
200 rx_queue->skb_currx = 0;
201 rxbdp = rx_queue->rx_bd_base;
203 for (j = 0; j < rx_queue->rx_ring_size; j++) {
204 struct sk_buff *skb = rx_queue->rx_skbuff[j];
207 gfar_init_rxbdp(rx_queue, rxbdp,
210 skb = gfar_new_skb(ndev);
212 netdev_err(ndev, "Can't allocate RX buffers\n");
215 rx_queue->rx_skbuff[j] = skb;
217 gfar_new_rxbdp(rx_queue, rxbdp, skb);
228 static int gfar_alloc_skb_resources(struct net_device *ndev)
233 struct gfar_private *priv = netdev_priv(ndev);
234 struct device *dev = priv->dev;
235 struct gfar_priv_tx_q *tx_queue = NULL;
236 struct gfar_priv_rx_q *rx_queue = NULL;
238 priv->total_tx_ring_size = 0;
239 for (i = 0; i < priv->num_tx_queues; i++)
240 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size;
242 priv->total_rx_ring_size = 0;
243 for (i = 0; i < priv->num_rx_queues; i++)
244 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size;
246 /* Allocate memory for the buffer descriptors */
247 vaddr = dma_alloc_coherent(dev,
248 sizeof(struct txbd8) * priv->total_tx_ring_size +
249 sizeof(struct rxbd8) * priv->total_rx_ring_size,
252 netif_err(priv, ifup, ndev,
253 "Could not allocate buffer descriptors!\n");
257 for (i = 0; i < priv->num_tx_queues; i++) {
258 tx_queue = priv->tx_queue[i];
259 tx_queue->tx_bd_base = vaddr;
260 tx_queue->tx_bd_dma_base = addr;
261 tx_queue->dev = ndev;
262 /* enet DMA only understands physical addresses */
263 addr += sizeof(struct txbd8) * tx_queue->tx_ring_size;
264 vaddr += sizeof(struct txbd8) * tx_queue->tx_ring_size;
267 /* Start the rx descriptor ring where the tx ring leaves off */
268 for (i = 0; i < priv->num_rx_queues; i++) {
269 rx_queue = priv->rx_queue[i];
270 rx_queue->rx_bd_base = vaddr;
271 rx_queue->rx_bd_dma_base = addr;
272 rx_queue->dev = ndev;
273 addr += sizeof(struct rxbd8) * rx_queue->rx_ring_size;
274 vaddr += sizeof(struct rxbd8) * rx_queue->rx_ring_size;
277 /* Setup the skbuff rings */
278 for (i = 0; i < priv->num_tx_queues; i++) {
279 tx_queue = priv->tx_queue[i];
280 tx_queue->tx_skbuff =
281 kmalloc_array(tx_queue->tx_ring_size,
282 sizeof(*tx_queue->tx_skbuff),
284 if (!tx_queue->tx_skbuff)
287 for (k = 0; k < tx_queue->tx_ring_size; k++)
288 tx_queue->tx_skbuff[k] = NULL;
291 for (i = 0; i < priv->num_rx_queues; i++) {
292 rx_queue = priv->rx_queue[i];
293 rx_queue->rx_skbuff =
294 kmalloc_array(rx_queue->rx_ring_size,
295 sizeof(*rx_queue->rx_skbuff),
297 if (!rx_queue->rx_skbuff)
300 for (j = 0; j < rx_queue->rx_ring_size; j++)
301 rx_queue->rx_skbuff[j] = NULL;
304 if (gfar_init_bds(ndev))
310 free_skb_resources(priv);
314 static void gfar_init_tx_rx_base(struct gfar_private *priv)
316 struct gfar __iomem *regs = priv->gfargrp[0].regs;
320 baddr = ®s->tbase0;
321 for (i = 0; i < priv->num_tx_queues; i++) {
322 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base);
326 baddr = ®s->rbase0;
327 for (i = 0; i < priv->num_rx_queues; i++) {
328 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base);
333 static void gfar_init_mac(struct net_device *ndev)
335 struct gfar_private *priv = netdev_priv(ndev);
336 struct gfar __iomem *regs = priv->gfargrp[0].regs;
341 /* write the tx/rx base registers */
342 gfar_init_tx_rx_base(priv);
344 /* Configure the coalescing support */
345 gfar_configure_coalescing(priv, 0xFF, 0xFF);
347 if (priv->rx_filer_enable) {
348 rctrl |= RCTRL_FILREN;
349 /* Program the RIR0 reg with the required distribution */
350 gfar_write(®s->rir0, DEFAULT_RIR0);
353 /* Restore PROMISC mode */
354 if (ndev->flags & IFF_PROMISC)
357 if (ndev->features & NETIF_F_RXCSUM)
358 rctrl |= RCTRL_CHECKSUMMING;
360 if (priv->extended_hash) {
361 rctrl |= RCTRL_EXTHASH;
363 gfar_clear_exact_match(ndev);
368 rctrl &= ~RCTRL_PAL_MASK;
369 rctrl |= RCTRL_PADDING(priv->padding);
372 /* Insert receive time stamps into padding alignment bytes */
373 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) {
374 rctrl &= ~RCTRL_PAL_MASK;
375 rctrl |= RCTRL_PADDING(8);
379 /* Enable HW time stamping if requested from user space */
380 if (priv->hwts_rx_en)
381 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE;
383 if (ndev->features & NETIF_F_HW_VLAN_RX)
384 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
386 /* Init rctrl based on our settings */
387 gfar_write(®s->rctrl, rctrl);
389 if (ndev->features & NETIF_F_IP_CSUM)
390 tctrl |= TCTRL_INIT_CSUM;
392 if (priv->prio_sched_en)
393 tctrl |= TCTRL_TXSCHED_PRIO;
395 tctrl |= TCTRL_TXSCHED_WRRS;
396 gfar_write(®s->tr03wt, DEFAULT_WRRS_WEIGHT);
397 gfar_write(®s->tr47wt, DEFAULT_WRRS_WEIGHT);
400 gfar_write(®s->tctrl, tctrl);
402 /* Set the extraction length and index */
403 attrs = ATTRELI_EL(priv->rx_stash_size) |
404 ATTRELI_EI(priv->rx_stash_index);
406 gfar_write(®s->attreli, attrs);
408 /* Start with defaults, and add stashing or locking
409 * depending on the approprate variables
411 attrs = ATTR_INIT_SETTINGS;
413 if (priv->bd_stash_en)
414 attrs |= ATTR_BDSTASH;
416 if (priv->rx_stash_size != 0)
417 attrs |= ATTR_BUFSTASH;
419 gfar_write(®s->attr, attrs);
421 gfar_write(®s->fifo_tx_thr, priv->fifo_threshold);
422 gfar_write(®s->fifo_tx_starve, priv->fifo_starve);
423 gfar_write(®s->fifo_tx_starve_shutoff, priv->fifo_starve_off);
426 static struct net_device_stats *gfar_get_stats(struct net_device *dev)
428 struct gfar_private *priv = netdev_priv(dev);
429 unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
430 unsigned long tx_packets = 0, tx_bytes = 0;
433 for (i = 0; i < priv->num_rx_queues; i++) {
434 rx_packets += priv->rx_queue[i]->stats.rx_packets;
435 rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
436 rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
439 dev->stats.rx_packets = rx_packets;
440 dev->stats.rx_bytes = rx_bytes;
441 dev->stats.rx_dropped = rx_dropped;
443 for (i = 0; i < priv->num_tx_queues; i++) {
444 tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
445 tx_packets += priv->tx_queue[i]->stats.tx_packets;
448 dev->stats.tx_bytes = tx_bytes;
449 dev->stats.tx_packets = tx_packets;
454 static const struct net_device_ops gfar_netdev_ops = {
455 .ndo_open = gfar_enet_open,
456 .ndo_start_xmit = gfar_start_xmit,
457 .ndo_stop = gfar_close,
458 .ndo_change_mtu = gfar_change_mtu,
459 .ndo_set_features = gfar_set_features,
460 .ndo_set_rx_mode = gfar_set_multi,
461 .ndo_tx_timeout = gfar_timeout,
462 .ndo_do_ioctl = gfar_ioctl,
463 .ndo_get_stats = gfar_get_stats,
464 .ndo_set_mac_address = eth_mac_addr,
465 .ndo_validate_addr = eth_validate_addr,
466 #ifdef CONFIG_NET_POLL_CONTROLLER
467 .ndo_poll_controller = gfar_netpoll,
471 void lock_rx_qs(struct gfar_private *priv)
475 for (i = 0; i < priv->num_rx_queues; i++)
476 spin_lock(&priv->rx_queue[i]->rxlock);
479 void lock_tx_qs(struct gfar_private *priv)
483 for (i = 0; i < priv->num_tx_queues; i++)
484 spin_lock(&priv->tx_queue[i]->txlock);
487 void unlock_rx_qs(struct gfar_private *priv)
491 for (i = 0; i < priv->num_rx_queues; i++)
492 spin_unlock(&priv->rx_queue[i]->rxlock);
495 void unlock_tx_qs(struct gfar_private *priv)
499 for (i = 0; i < priv->num_tx_queues; i++)
500 spin_unlock(&priv->tx_queue[i]->txlock);
503 static bool gfar_is_vlan_on(struct gfar_private *priv)
505 return (priv->ndev->features & NETIF_F_HW_VLAN_RX) ||
506 (priv->ndev->features & NETIF_F_HW_VLAN_TX);
509 /* Returns 1 if incoming frames use an FCB */
510 static inline int gfar_uses_fcb(struct gfar_private *priv)
512 return gfar_is_vlan_on(priv) ||
513 (priv->ndev->features & NETIF_F_RXCSUM) ||
514 (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
517 static void free_tx_pointers(struct gfar_private *priv)
521 for (i = 0; i < priv->num_tx_queues; i++)
522 kfree(priv->tx_queue[i]);
525 static void free_rx_pointers(struct gfar_private *priv)
529 for (i = 0; i < priv->num_rx_queues; i++)
530 kfree(priv->rx_queue[i]);
533 static void unmap_group_regs(struct gfar_private *priv)
537 for (i = 0; i < MAXGROUPS; i++)
538 if (priv->gfargrp[i].regs)
539 iounmap(priv->gfargrp[i].regs);
542 static void free_gfar_dev(struct gfar_private *priv)
546 for (i = 0; i < priv->num_grps; i++)
547 for (j = 0; j < GFAR_NUM_IRQS; j++) {
548 kfree(priv->gfargrp[i].irqinfo[j]);
549 priv->gfargrp[i].irqinfo[j] = NULL;
552 free_netdev(priv->ndev);
555 static void disable_napi(struct gfar_private *priv)
559 for (i = 0; i < priv->num_grps; i++)
560 napi_disable(&priv->gfargrp[i].napi);
563 static void enable_napi(struct gfar_private *priv)
567 for (i = 0; i < priv->num_grps; i++)
568 napi_enable(&priv->gfargrp[i].napi);
571 static int gfar_parse_group(struct device_node *np,
572 struct gfar_private *priv, const char *model)
574 struct gfar_priv_grp *grp = &priv->gfargrp[priv->num_grps];
578 for (i = 0; i < GFAR_NUM_IRQS; i++) {
579 grp->irqinfo[i] = kzalloc(sizeof(struct gfar_irqinfo),
581 if (!grp->irqinfo[i])
585 grp->regs = of_iomap(np, 0);
589 gfar_irq(grp, TX)->irq = irq_of_parse_and_map(np, 0);
591 /* If we aren't the FEC we have multiple interrupts */
592 if (model && strcasecmp(model, "FEC")) {
593 gfar_irq(grp, RX)->irq = irq_of_parse_and_map(np, 1);
594 gfar_irq(grp, ER)->irq = irq_of_parse_and_map(np, 2);
595 if (gfar_irq(grp, TX)->irq == NO_IRQ ||
596 gfar_irq(grp, RX)->irq == NO_IRQ ||
597 gfar_irq(grp, ER)->irq == NO_IRQ)
601 grp->grp_id = priv->num_grps;
603 spin_lock_init(&grp->grplock);
604 if (priv->mode == MQ_MG_MODE) {
605 queue_mask = (u32 *)of_get_property(np, "fsl,rx-bit-map", NULL);
606 grp->rx_bit_map = queue_mask ?
607 *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
608 queue_mask = (u32 *)of_get_property(np, "fsl,tx-bit-map", NULL);
609 grp->tx_bit_map = queue_mask ?
610 *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
612 grp->rx_bit_map = 0xFF;
613 grp->tx_bit_map = 0xFF;
620 static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
624 const void *mac_addr;
626 struct net_device *dev = NULL;
627 struct gfar_private *priv = NULL;
628 struct device_node *np = ofdev->dev.of_node;
629 struct device_node *child = NULL;
631 const u32 *stash_len;
632 const u32 *stash_idx;
633 unsigned int num_tx_qs, num_rx_qs;
634 u32 *tx_queues, *rx_queues;
636 if (!np || !of_device_is_available(np))
639 /* parse the num of tx and rx queues */
640 tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL);
641 num_tx_qs = tx_queues ? *tx_queues : 1;
643 if (num_tx_qs > MAX_TX_QS) {
644 pr_err("num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n",
645 num_tx_qs, MAX_TX_QS);
646 pr_err("Cannot do alloc_etherdev, aborting\n");
650 rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL);
651 num_rx_qs = rx_queues ? *rx_queues : 1;
653 if (num_rx_qs > MAX_RX_QS) {
654 pr_err("num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n",
655 num_rx_qs, MAX_RX_QS);
656 pr_err("Cannot do alloc_etherdev, aborting\n");
660 *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs);
665 priv = netdev_priv(dev);
668 priv->num_tx_queues = num_tx_qs;
669 netif_set_real_num_rx_queues(dev, num_rx_qs);
670 priv->num_rx_queues = num_rx_qs;
671 priv->num_grps = 0x0;
673 /* Init Rx queue filer rule set linked list */
674 INIT_LIST_HEAD(&priv->rx_list.list);
675 priv->rx_list.count = 0;
676 mutex_init(&priv->rx_queue_access);
678 model = of_get_property(np, "model", NULL);
680 for (i = 0; i < MAXGROUPS; i++)
681 priv->gfargrp[i].regs = NULL;
683 /* Parse and initialize group specific information */
684 if (of_device_is_compatible(np, "fsl,etsec2")) {
685 priv->mode = MQ_MG_MODE;
686 for_each_child_of_node(np, child) {
687 err = gfar_parse_group(child, priv, model);
692 priv->mode = SQ_SG_MODE;
693 err = gfar_parse_group(np, priv, model);
698 for (i = 0; i < priv->num_tx_queues; i++)
699 priv->tx_queue[i] = NULL;
700 for (i = 0; i < priv->num_rx_queues; i++)
701 priv->rx_queue[i] = NULL;
703 for (i = 0; i < priv->num_tx_queues; i++) {
704 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q),
706 if (!priv->tx_queue[i]) {
708 goto tx_alloc_failed;
710 priv->tx_queue[i]->tx_skbuff = NULL;
711 priv->tx_queue[i]->qindex = i;
712 priv->tx_queue[i]->dev = dev;
713 spin_lock_init(&(priv->tx_queue[i]->txlock));
716 for (i = 0; i < priv->num_rx_queues; i++) {
717 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q),
719 if (!priv->rx_queue[i]) {
721 goto rx_alloc_failed;
723 priv->rx_queue[i]->rx_skbuff = NULL;
724 priv->rx_queue[i]->qindex = i;
725 priv->rx_queue[i]->dev = dev;
726 spin_lock_init(&(priv->rx_queue[i]->rxlock));
730 stash = of_get_property(np, "bd-stash", NULL);
733 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
734 priv->bd_stash_en = 1;
737 stash_len = of_get_property(np, "rx-stash-len", NULL);
740 priv->rx_stash_size = *stash_len;
742 stash_idx = of_get_property(np, "rx-stash-idx", NULL);
745 priv->rx_stash_index = *stash_idx;
747 if (stash_len || stash_idx)
748 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
750 mac_addr = of_get_mac_address(np);
753 memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
755 if (model && !strcasecmp(model, "TSEC"))
756 priv->device_flags = FSL_GIANFAR_DEV_HAS_GIGABIT |
757 FSL_GIANFAR_DEV_HAS_COALESCE |
758 FSL_GIANFAR_DEV_HAS_RMON |
759 FSL_GIANFAR_DEV_HAS_MULTI_INTR;
761 if (model && !strcasecmp(model, "eTSEC"))
762 priv->device_flags = FSL_GIANFAR_DEV_HAS_GIGABIT |
763 FSL_GIANFAR_DEV_HAS_COALESCE |
764 FSL_GIANFAR_DEV_HAS_RMON |
765 FSL_GIANFAR_DEV_HAS_MULTI_INTR |
766 FSL_GIANFAR_DEV_HAS_PADDING |
767 FSL_GIANFAR_DEV_HAS_CSUM |
768 FSL_GIANFAR_DEV_HAS_VLAN |
769 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
770 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
771 FSL_GIANFAR_DEV_HAS_TIMER;
773 ctype = of_get_property(np, "phy-connection-type", NULL);
775 /* We only care about rgmii-id. The rest are autodetected */
776 if (ctype && !strcmp(ctype, "rgmii-id"))
777 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
779 priv->interface = PHY_INTERFACE_MODE_MII;
781 if (of_get_property(np, "fsl,magic-packet", NULL))
782 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
784 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
786 /* Find the TBI PHY. If it's not there, we don't support SGMII */
787 priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
792 free_rx_pointers(priv);
794 free_tx_pointers(priv);
796 unmap_group_regs(priv);
801 static int gfar_hwtstamp_ioctl(struct net_device *netdev,
802 struct ifreq *ifr, int cmd)
804 struct hwtstamp_config config;
805 struct gfar_private *priv = netdev_priv(netdev);
807 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
810 /* reserved for future extensions */
814 switch (config.tx_type) {
815 case HWTSTAMP_TX_OFF:
816 priv->hwts_tx_en = 0;
819 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
821 priv->hwts_tx_en = 1;
827 switch (config.rx_filter) {
828 case HWTSTAMP_FILTER_NONE:
829 if (priv->hwts_rx_en) {
831 priv->hwts_rx_en = 0;
832 startup_gfar(netdev);
836 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
838 if (!priv->hwts_rx_en) {
840 priv->hwts_rx_en = 1;
841 startup_gfar(netdev);
843 config.rx_filter = HWTSTAMP_FILTER_ALL;
847 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
851 /* Ioctl MII Interface */
852 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
854 struct gfar_private *priv = netdev_priv(dev);
856 if (!netif_running(dev))
859 if (cmd == SIOCSHWTSTAMP)
860 return gfar_hwtstamp_ioctl(dev, rq, cmd);
865 return phy_mii_ioctl(priv->phydev, rq, cmd);
868 static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
870 unsigned int new_bit_map = 0x0;
871 int mask = 0x1 << (max_qs - 1), i;
873 for (i = 0; i < max_qs; i++) {
875 new_bit_map = new_bit_map + (1 << i);
881 static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
884 u32 rqfpr = FPR_FILER_MASK;
888 rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
889 priv->ftp_rqfpr[rqfar] = rqfpr;
890 priv->ftp_rqfcr[rqfar] = rqfcr;
891 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
894 rqfcr = RQFCR_CMP_NOMATCH;
895 priv->ftp_rqfpr[rqfar] = rqfpr;
896 priv->ftp_rqfcr[rqfar] = rqfcr;
897 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
900 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
902 priv->ftp_rqfcr[rqfar] = rqfcr;
903 priv->ftp_rqfpr[rqfar] = rqfpr;
904 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
907 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
909 priv->ftp_rqfcr[rqfar] = rqfcr;
910 priv->ftp_rqfpr[rqfar] = rqfpr;
911 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
916 static void gfar_init_filer_table(struct gfar_private *priv)
919 u32 rqfar = MAX_FILER_IDX;
921 u32 rqfpr = FPR_FILER_MASK;
924 rqfcr = RQFCR_CMP_MATCH;
925 priv->ftp_rqfcr[rqfar] = rqfcr;
926 priv->ftp_rqfpr[rqfar] = rqfpr;
927 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
929 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
930 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
931 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
932 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
933 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
934 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
936 /* cur_filer_idx indicated the first non-masked rule */
937 priv->cur_filer_idx = rqfar;
939 /* Rest are masked rules */
940 rqfcr = RQFCR_CMP_NOMATCH;
941 for (i = 0; i < rqfar; i++) {
942 priv->ftp_rqfcr[i] = rqfcr;
943 priv->ftp_rqfpr[i] = rqfpr;
944 gfar_write_filer(priv, i, rqfcr, rqfpr);
948 static void gfar_detect_errata(struct gfar_private *priv)
950 struct device *dev = &priv->ofdev->dev;
951 unsigned int pvr = mfspr(SPRN_PVR);
952 unsigned int svr = mfspr(SPRN_SVR);
953 unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */
954 unsigned int rev = svr & 0xffff;
956 /* MPC8313 Rev 2.0 and higher; All MPC837x */
957 if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) ||
958 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
959 priv->errata |= GFAR_ERRATA_74;
961 /* MPC8313 and MPC837x all rev */
962 if ((pvr == 0x80850010 && mod == 0x80b0) ||
963 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
964 priv->errata |= GFAR_ERRATA_76;
966 /* MPC8313 and MPC837x all rev */
967 if ((pvr == 0x80850010 && mod == 0x80b0) ||
968 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
969 priv->errata |= GFAR_ERRATA_A002;
971 /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */
972 if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) ||
973 (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020))
974 priv->errata |= GFAR_ERRATA_12;
977 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
981 /* Set up the ethernet device structure, private data,
982 * and anything else we need before we start
984 static int gfar_probe(struct platform_device *ofdev)
987 struct net_device *dev = NULL;
988 struct gfar_private *priv = NULL;
989 struct gfar __iomem *regs = NULL;
990 int err = 0, i, grp_idx = 0;
991 u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
995 err = gfar_of_init(ofdev, &dev);
1000 priv = netdev_priv(dev);
1002 priv->ofdev = ofdev;
1003 priv->dev = &ofdev->dev;
1004 SET_NETDEV_DEV(dev, &ofdev->dev);
1006 spin_lock_init(&priv->bflock);
1007 INIT_WORK(&priv->reset_task, gfar_reset_task);
1009 dev_set_drvdata(&ofdev->dev, priv);
1010 regs = priv->gfargrp[0].regs;
1012 gfar_detect_errata(priv);
1014 /* Stop the DMA engine now, in case it was running before
1015 * (The firmware could have used it, and left it running).
1019 /* Reset MAC layer */
1020 gfar_write(®s->maccfg1, MACCFG1_SOFT_RESET);
1022 /* We need to delay at least 3 TX clocks */
1025 tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
1026 gfar_write(®s->maccfg1, tempval);
1028 /* Initialize MACCFG2. */
1029 tempval = MACCFG2_INIT_SETTINGS;
1030 if (gfar_has_errata(priv, GFAR_ERRATA_74))
1031 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK;
1032 gfar_write(®s->maccfg2, tempval);
1034 /* Initialize ECNTRL */
1035 gfar_write(®s->ecntrl, ECNTRL_INIT_SETTINGS);
1037 /* Set the dev->base_addr to the gfar reg region */
1038 dev->base_addr = (unsigned long) regs;
1040 /* Fill in the dev structure */
1041 dev->watchdog_timeo = TX_TIMEOUT;
1043 dev->netdev_ops = &gfar_netdev_ops;
1044 dev->ethtool_ops = &gfar_ethtool_ops;
1046 /* Register for napi ...We are registering NAPI for each grp */
1047 for (i = 0; i < priv->num_grps; i++)
1048 netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll,
1051 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
1052 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
1054 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG |
1055 NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
1058 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
1059 dev->hw_features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1060 dev->features |= NETIF_F_HW_VLAN_RX;
1063 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
1064 priv->extended_hash = 1;
1065 priv->hash_width = 9;
1067 priv->hash_regs[0] = ®s->igaddr0;
1068 priv->hash_regs[1] = ®s->igaddr1;
1069 priv->hash_regs[2] = ®s->igaddr2;
1070 priv->hash_regs[3] = ®s->igaddr3;
1071 priv->hash_regs[4] = ®s->igaddr4;
1072 priv->hash_regs[5] = ®s->igaddr5;
1073 priv->hash_regs[6] = ®s->igaddr6;
1074 priv->hash_regs[7] = ®s->igaddr7;
1075 priv->hash_regs[8] = ®s->gaddr0;
1076 priv->hash_regs[9] = ®s->gaddr1;
1077 priv->hash_regs[10] = ®s->gaddr2;
1078 priv->hash_regs[11] = ®s->gaddr3;
1079 priv->hash_regs[12] = ®s->gaddr4;
1080 priv->hash_regs[13] = ®s->gaddr5;
1081 priv->hash_regs[14] = ®s->gaddr6;
1082 priv->hash_regs[15] = ®s->gaddr7;
1085 priv->extended_hash = 0;
1086 priv->hash_width = 8;
1088 priv->hash_regs[0] = ®s->gaddr0;
1089 priv->hash_regs[1] = ®s->gaddr1;
1090 priv->hash_regs[2] = ®s->gaddr2;
1091 priv->hash_regs[3] = ®s->gaddr3;
1092 priv->hash_regs[4] = ®s->gaddr4;
1093 priv->hash_regs[5] = ®s->gaddr5;
1094 priv->hash_regs[6] = ®s->gaddr6;
1095 priv->hash_regs[7] = ®s->gaddr7;
1098 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
1099 priv->padding = DEFAULT_PADDING;
1103 if (dev->features & NETIF_F_IP_CSUM ||
1104 priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
1105 dev->needed_headroom = GMAC_FCB_LEN;
1107 /* Program the isrg regs only if number of grps > 1 */
1108 if (priv->num_grps > 1) {
1109 baddr = ®s->isrg0;
1110 for (i = 0; i < priv->num_grps; i++) {
1111 isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
1112 isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
1113 gfar_write(baddr, isrg);
1119 /* Need to reverse the bit maps as bit_map's MSB is q0
1120 * but, for_each_set_bit parses from right to left, which
1121 * basically reverses the queue numbers
1123 for (i = 0; i< priv->num_grps; i++) {
1124 priv->gfargrp[i].tx_bit_map =
1125 reverse_bitmap(priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
1126 priv->gfargrp[i].rx_bit_map =
1127 reverse_bitmap(priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
1130 /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
1131 * also assign queues to groups
1133 for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
1134 priv->gfargrp[grp_idx].num_rx_queues = 0x0;
1136 for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
1137 priv->num_rx_queues) {
1138 priv->gfargrp[grp_idx].num_rx_queues++;
1139 priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
1140 rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
1141 rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
1143 priv->gfargrp[grp_idx].num_tx_queues = 0x0;
1145 for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map,
1146 priv->num_tx_queues) {
1147 priv->gfargrp[grp_idx].num_tx_queues++;
1148 priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
1149 tstat = tstat | (TSTAT_CLEAR_THALT >> i);
1150 tqueue = tqueue | (TQUEUE_EN0 >> i);
1152 priv->gfargrp[grp_idx].rstat = rstat;
1153 priv->gfargrp[grp_idx].tstat = tstat;
1157 gfar_write(®s->rqueue, rqueue);
1158 gfar_write(®s->tqueue, tqueue);
1160 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
1162 /* Initializing some of the rx/tx queue level parameters */
1163 for (i = 0; i < priv->num_tx_queues; i++) {
1164 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE;
1165 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE;
1166 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE;
1167 priv->tx_queue[i]->txic = DEFAULT_TXIC;
1170 for (i = 0; i < priv->num_rx_queues; i++) {
1171 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE;
1172 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE;
1173 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
1176 /* always enable rx filer */
1177 priv->rx_filer_enable = 1;
1178 /* Enable most messages by default */
1179 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1180 /* use pritority h/w tx queue scheduling for single queue devices */
1181 if (priv->num_tx_queues == 1)
1182 priv->prio_sched_en = 1;
1184 /* Carrier starts down, phylib will bring it up */
1185 netif_carrier_off(dev);
1187 err = register_netdev(dev);
1190 pr_err("%s: Cannot register net device, aborting\n", dev->name);
1194 device_init_wakeup(&dev->dev,
1195 priv->device_flags &
1196 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1198 /* fill out IRQ number and name fields */
1199 for (i = 0; i < priv->num_grps; i++) {
1200 struct gfar_priv_grp *grp = &priv->gfargrp[i];
1201 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1202 sprintf(gfar_irq(grp, TX)->name, "%s%s%c%s",
1203 dev->name, "_g", '0' + i, "_tx");
1204 sprintf(gfar_irq(grp, RX)->name, "%s%s%c%s",
1205 dev->name, "_g", '0' + i, "_rx");
1206 sprintf(gfar_irq(grp, ER)->name, "%s%s%c%s",
1207 dev->name, "_g", '0' + i, "_er");
1209 strcpy(gfar_irq(grp, TX)->name, dev->name);
1212 /* Initialize the filer table */
1213 gfar_init_filer_table(priv);
1215 /* Create all the sysfs files */
1216 gfar_init_sysfs(dev);
1218 /* Print out the device info */
1219 netdev_info(dev, "mac: %pM\n", dev->dev_addr);
1221 /* Even more device info helps when determining which kernel
1222 * provided which set of benchmarks.
1224 netdev_info(dev, "Running with NAPI enabled\n");
1225 for (i = 0; i < priv->num_rx_queues; i++)
1226 netdev_info(dev, "RX BD ring size for Q[%d]: %d\n",
1227 i, priv->rx_queue[i]->rx_ring_size);
1228 for (i = 0; i < priv->num_tx_queues; i++)
1229 netdev_info(dev, "TX BD ring size for Q[%d]: %d\n",
1230 i, priv->tx_queue[i]->tx_ring_size);
1235 unmap_group_regs(priv);
1236 free_tx_pointers(priv);
1237 free_rx_pointers(priv);
1239 of_node_put(priv->phy_node);
1241 of_node_put(priv->tbi_node);
1242 free_gfar_dev(priv);
1246 static int gfar_remove(struct platform_device *ofdev)
1248 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
1251 of_node_put(priv->phy_node);
1253 of_node_put(priv->tbi_node);
1255 dev_set_drvdata(&ofdev->dev, NULL);
1257 unregister_netdev(priv->ndev);
1258 unmap_group_regs(priv);
1259 free_gfar_dev(priv);
1266 static int gfar_suspend(struct device *dev)
1268 struct gfar_private *priv = dev_get_drvdata(dev);
1269 struct net_device *ndev = priv->ndev;
1270 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1271 unsigned long flags;
1274 int magic_packet = priv->wol_en &&
1275 (priv->device_flags &
1276 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1278 netif_device_detach(ndev);
1280 if (netif_running(ndev)) {
1282 local_irq_save(flags);
1286 gfar_halt_nodisable(ndev);
1288 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
1289 tempval = gfar_read(®s->maccfg1);
1291 tempval &= ~MACCFG1_TX_EN;
1294 tempval &= ~MACCFG1_RX_EN;
1296 gfar_write(®s->maccfg1, tempval);
1300 local_irq_restore(flags);
1305 /* Enable interrupt on Magic Packet */
1306 gfar_write(®s->imask, IMASK_MAG);
1308 /* Enable Magic Packet mode */
1309 tempval = gfar_read(®s->maccfg2);
1310 tempval |= MACCFG2_MPEN;
1311 gfar_write(®s->maccfg2, tempval);
1313 phy_stop(priv->phydev);
1320 static int gfar_resume(struct device *dev)
1322 struct gfar_private *priv = dev_get_drvdata(dev);
1323 struct net_device *ndev = priv->ndev;
1324 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1325 unsigned long flags;
1327 int magic_packet = priv->wol_en &&
1328 (priv->device_flags &
1329 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1331 if (!netif_running(ndev)) {
1332 netif_device_attach(ndev);
1336 if (!magic_packet && priv->phydev)
1337 phy_start(priv->phydev);
1339 /* Disable Magic Packet mode, in case something
1342 local_irq_save(flags);
1346 tempval = gfar_read(®s->maccfg2);
1347 tempval &= ~MACCFG2_MPEN;
1348 gfar_write(®s->maccfg2, tempval);
1354 local_irq_restore(flags);
1356 netif_device_attach(ndev);
1363 static int gfar_restore(struct device *dev)
1365 struct gfar_private *priv = dev_get_drvdata(dev);
1366 struct net_device *ndev = priv->ndev;
1368 if (!netif_running(ndev)) {
1369 netif_device_attach(ndev);
1374 if (gfar_init_bds(ndev)) {
1375 free_skb_resources(priv);
1379 init_registers(ndev);
1380 gfar_set_mac_address(ndev);
1381 gfar_init_mac(ndev);
1386 priv->oldduplex = -1;
1389 phy_start(priv->phydev);
1391 netif_device_attach(ndev);
1397 static struct dev_pm_ops gfar_pm_ops = {
1398 .suspend = gfar_suspend,
1399 .resume = gfar_resume,
1400 .freeze = gfar_suspend,
1401 .thaw = gfar_resume,
1402 .restore = gfar_restore,
1405 #define GFAR_PM_OPS (&gfar_pm_ops)
1409 #define GFAR_PM_OPS NULL
1413 /* Reads the controller's registers to determine what interface
1414 * connects it to the PHY.
1416 static phy_interface_t gfar_get_interface(struct net_device *dev)
1418 struct gfar_private *priv = netdev_priv(dev);
1419 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1422 ecntrl = gfar_read(®s->ecntrl);
1424 if (ecntrl & ECNTRL_SGMII_MODE)
1425 return PHY_INTERFACE_MODE_SGMII;
1427 if (ecntrl & ECNTRL_TBI_MODE) {
1428 if (ecntrl & ECNTRL_REDUCED_MODE)
1429 return PHY_INTERFACE_MODE_RTBI;
1431 return PHY_INTERFACE_MODE_TBI;
1434 if (ecntrl & ECNTRL_REDUCED_MODE) {
1435 if (ecntrl & ECNTRL_REDUCED_MII_MODE) {
1436 return PHY_INTERFACE_MODE_RMII;
1439 phy_interface_t interface = priv->interface;
1441 /* This isn't autodetected right now, so it must
1442 * be set by the device tree or platform code.
1444 if (interface == PHY_INTERFACE_MODE_RGMII_ID)
1445 return PHY_INTERFACE_MODE_RGMII_ID;
1447 return PHY_INTERFACE_MODE_RGMII;
1451 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
1452 return PHY_INTERFACE_MODE_GMII;
1454 return PHY_INTERFACE_MODE_MII;
1458 /* Initializes driver's PHY state, and attaches to the PHY.
1459 * Returns 0 on success.
1461 static int init_phy(struct net_device *dev)
1463 struct gfar_private *priv = netdev_priv(dev);
1464 uint gigabit_support =
1465 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
1466 SUPPORTED_1000baseT_Full : 0;
1467 phy_interface_t interface;
1471 priv->oldduplex = -1;
1473 interface = gfar_get_interface(dev);
1475 priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
1478 priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
1480 if (!priv->phydev) {
1481 dev_err(&dev->dev, "could not attach to PHY\n");
1485 if (interface == PHY_INTERFACE_MODE_SGMII)
1486 gfar_configure_serdes(dev);
1488 /* Remove any features not supported by the controller */
1489 priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
1490 priv->phydev->advertising = priv->phydev->supported;
1495 /* Initialize TBI PHY interface for communicating with the
1496 * SERDES lynx PHY on the chip. We communicate with this PHY
1497 * through the MDIO bus on each controller, treating it as a
1498 * "normal" PHY at the address found in the TBIPA register. We assume
1499 * that the TBIPA register is valid. Either the MDIO bus code will set
1500 * it to a value that doesn't conflict with other PHYs on the bus, or the
1501 * value doesn't matter, as there are no other PHYs on the bus.
1503 static void gfar_configure_serdes(struct net_device *dev)
1505 struct gfar_private *priv = netdev_priv(dev);
1506 struct phy_device *tbiphy;
1508 if (!priv->tbi_node) {
1509 dev_warn(&dev->dev, "error: SGMII mode requires that the "
1510 "device tree specify a tbi-handle\n");
1514 tbiphy = of_phy_find_device(priv->tbi_node);
1516 dev_err(&dev->dev, "error: Could not get TBI device\n");
1520 /* If the link is already up, we must already be ok, and don't need to
1521 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
1522 * everything for us? Resetting it takes the link down and requires
1523 * several seconds for it to come back.
1525 if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
1528 /* Single clk mode, mii mode off(for serdes communication) */
1529 phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
1531 phy_write(tbiphy, MII_ADVERTISE,
1532 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1533 ADVERTISE_1000XPSE_ASYM);
1535 phy_write(tbiphy, MII_BMCR,
1536 BMCR_ANENABLE | BMCR_ANRESTART | BMCR_FULLDPLX |
1540 static void init_registers(struct net_device *dev)
1542 struct gfar_private *priv = netdev_priv(dev);
1543 struct gfar __iomem *regs = NULL;
1546 for (i = 0; i < priv->num_grps; i++) {
1547 regs = priv->gfargrp[i].regs;
1549 gfar_write(®s->ievent, IEVENT_INIT_CLEAR);
1551 /* Initialize IMASK */
1552 gfar_write(®s->imask, IMASK_INIT_CLEAR);
1555 regs = priv->gfargrp[0].regs;
1556 /* Init hash registers to zero */
1557 gfar_write(®s->igaddr0, 0);
1558 gfar_write(®s->igaddr1, 0);
1559 gfar_write(®s->igaddr2, 0);
1560 gfar_write(®s->igaddr3, 0);
1561 gfar_write(®s->igaddr4, 0);
1562 gfar_write(®s->igaddr5, 0);
1563 gfar_write(®s->igaddr6, 0);
1564 gfar_write(®s->igaddr7, 0);
1566 gfar_write(®s->gaddr0, 0);
1567 gfar_write(®s->gaddr1, 0);
1568 gfar_write(®s->gaddr2, 0);
1569 gfar_write(®s->gaddr3, 0);
1570 gfar_write(®s->gaddr4, 0);
1571 gfar_write(®s->gaddr5, 0);
1572 gfar_write(®s->gaddr6, 0);
1573 gfar_write(®s->gaddr7, 0);
1575 /* Zero out the rmon mib registers if it has them */
1576 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
1577 memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib));
1579 /* Mask off the CAM interrupts */
1580 gfar_write(®s->rmon.cam1, 0xffffffff);
1581 gfar_write(®s->rmon.cam2, 0xffffffff);
1584 /* Initialize the max receive buffer length */
1585 gfar_write(®s->mrblr, priv->rx_buffer_size);
1587 /* Initialize the Minimum Frame Length Register */
1588 gfar_write(®s->minflr, MINFLR_INIT_SETTINGS);
1591 static int __gfar_is_rx_idle(struct gfar_private *priv)
1595 /* Normaly TSEC should not hang on GRS commands, so we should
1596 * actually wait for IEVENT_GRSC flag.
1598 if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002)))
1601 /* Read the eTSEC register at offset 0xD1C. If bits 7-14 are
1602 * the same as bits 23-30, the eTSEC Rx is assumed to be idle
1603 * and the Rx can be safely reset.
1605 res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c);
1607 if ((res & 0xffff) == (res >> 16))
1613 /* Halt the receive and transmit queues */
1614 static void gfar_halt_nodisable(struct net_device *dev)
1616 struct gfar_private *priv = netdev_priv(dev);
1617 struct gfar __iomem *regs = NULL;
1621 for (i = 0; i < priv->num_grps; i++) {
1622 regs = priv->gfargrp[i].regs;
1623 /* Mask all interrupts */
1624 gfar_write(®s->imask, IMASK_INIT_CLEAR);
1626 /* Clear all interrupts */
1627 gfar_write(®s->ievent, IEVENT_INIT_CLEAR);
1630 regs = priv->gfargrp[0].regs;
1631 /* Stop the DMA, and wait for it to stop */
1632 tempval = gfar_read(®s->dmactrl);
1633 if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) !=
1634 (DMACTRL_GRS | DMACTRL_GTS)) {
1637 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
1638 gfar_write(®s->dmactrl, tempval);
1641 ret = spin_event_timeout(((gfar_read(®s->ievent) &
1642 (IEVENT_GRSC | IEVENT_GTSC)) ==
1643 (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
1644 if (!ret && !(gfar_read(®s->ievent) & IEVENT_GRSC))
1645 ret = __gfar_is_rx_idle(priv);
1650 /* Halt the receive and transmit queues */
1651 void gfar_halt(struct net_device *dev)
1653 struct gfar_private *priv = netdev_priv(dev);
1654 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1657 gfar_halt_nodisable(dev);
1659 /* Disable Rx and Tx */
1660 tempval = gfar_read(®s->maccfg1);
1661 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
1662 gfar_write(®s->maccfg1, tempval);
1665 static void free_grp_irqs(struct gfar_priv_grp *grp)
1667 free_irq(gfar_irq(grp, TX)->irq, grp);
1668 free_irq(gfar_irq(grp, RX)->irq, grp);
1669 free_irq(gfar_irq(grp, ER)->irq, grp);
1672 void stop_gfar(struct net_device *dev)
1674 struct gfar_private *priv = netdev_priv(dev);
1675 unsigned long flags;
1678 phy_stop(priv->phydev);
1682 local_irq_save(flags);
1690 local_irq_restore(flags);
1693 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1694 for (i = 0; i < priv->num_grps; i++)
1695 free_grp_irqs(&priv->gfargrp[i]);
1697 for (i = 0; i < priv->num_grps; i++)
1698 free_irq(gfar_irq(&priv->gfargrp[i], TX)->irq,
1702 free_skb_resources(priv);
1705 static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue)
1707 struct txbd8 *txbdp;
1708 struct gfar_private *priv = netdev_priv(tx_queue->dev);
1711 txbdp = tx_queue->tx_bd_base;
1713 for (i = 0; i < tx_queue->tx_ring_size; i++) {
1714 if (!tx_queue->tx_skbuff[i])
1717 dma_unmap_single(priv->dev, txbdp->bufPtr,
1718 txbdp->length, DMA_TO_DEVICE);
1720 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags;
1723 dma_unmap_page(priv->dev, txbdp->bufPtr,
1724 txbdp->length, DMA_TO_DEVICE);
1727 dev_kfree_skb_any(tx_queue->tx_skbuff[i]);
1728 tx_queue->tx_skbuff[i] = NULL;
1730 kfree(tx_queue->tx_skbuff);
1731 tx_queue->tx_skbuff = NULL;
1734 static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue)
1736 struct rxbd8 *rxbdp;
1737 struct gfar_private *priv = netdev_priv(rx_queue->dev);
1740 rxbdp = rx_queue->rx_bd_base;
1742 for (i = 0; i < rx_queue->rx_ring_size; i++) {
1743 if (rx_queue->rx_skbuff[i]) {
1744 dma_unmap_single(priv->dev, rxbdp->bufPtr,
1745 priv->rx_buffer_size,
1747 dev_kfree_skb_any(rx_queue->rx_skbuff[i]);
1748 rx_queue->rx_skbuff[i] = NULL;
1754 kfree(rx_queue->rx_skbuff);
1755 rx_queue->rx_skbuff = NULL;
1758 /* If there are any tx skbs or rx skbs still around, free them.
1759 * Then free tx_skbuff and rx_skbuff
1761 static void free_skb_resources(struct gfar_private *priv)
1763 struct gfar_priv_tx_q *tx_queue = NULL;
1764 struct gfar_priv_rx_q *rx_queue = NULL;
1767 /* Go through all the buffer descriptors and free their data buffers */
1768 for (i = 0; i < priv->num_tx_queues; i++) {
1769 struct netdev_queue *txq;
1771 tx_queue = priv->tx_queue[i];
1772 txq = netdev_get_tx_queue(tx_queue->dev, tx_queue->qindex);
1773 if (tx_queue->tx_skbuff)
1774 free_skb_tx_queue(tx_queue);
1775 netdev_tx_reset_queue(txq);
1778 for (i = 0; i < priv->num_rx_queues; i++) {
1779 rx_queue = priv->rx_queue[i];
1780 if (rx_queue->rx_skbuff)
1781 free_skb_rx_queue(rx_queue);
1784 dma_free_coherent(priv->dev,
1785 sizeof(struct txbd8) * priv->total_tx_ring_size +
1786 sizeof(struct rxbd8) * priv->total_rx_ring_size,
1787 priv->tx_queue[0]->tx_bd_base,
1788 priv->tx_queue[0]->tx_bd_dma_base);
1791 void gfar_start(struct net_device *dev)
1793 struct gfar_private *priv = netdev_priv(dev);
1794 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1798 /* Enable Rx and Tx in MACCFG1 */
1799 tempval = gfar_read(®s->maccfg1);
1800 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
1801 gfar_write(®s->maccfg1, tempval);
1803 /* Initialize DMACTRL to have WWR and WOP */
1804 tempval = gfar_read(®s->dmactrl);
1805 tempval |= DMACTRL_INIT_SETTINGS;
1806 gfar_write(®s->dmactrl, tempval);
1808 /* Make sure we aren't stopped */
1809 tempval = gfar_read(®s->dmactrl);
1810 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
1811 gfar_write(®s->dmactrl, tempval);
1813 for (i = 0; i < priv->num_grps; i++) {
1814 regs = priv->gfargrp[i].regs;
1815 /* Clear THLT/RHLT, so that the DMA starts polling now */
1816 gfar_write(®s->tstat, priv->gfargrp[i].tstat);
1817 gfar_write(®s->rstat, priv->gfargrp[i].rstat);
1818 /* Unmask the interrupts we look for */
1819 gfar_write(®s->imask, IMASK_DEFAULT);
1822 dev->trans_start = jiffies; /* prevent tx timeout */
1825 void gfar_configure_coalescing(struct gfar_private *priv,
1826 unsigned long tx_mask, unsigned long rx_mask)
1828 struct gfar __iomem *regs = priv->gfargrp[0].regs;
1832 /* Backward compatible case ---- even if we enable
1833 * multiple queues, there's only single reg to program
1835 gfar_write(®s->txic, 0);
1836 if (likely(priv->tx_queue[0]->txcoalescing))
1837 gfar_write(®s->txic, priv->tx_queue[0]->txic);
1839 gfar_write(®s->rxic, 0);
1840 if (unlikely(priv->rx_queue[0]->rxcoalescing))
1841 gfar_write(®s->rxic, priv->rx_queue[0]->rxic);
1843 if (priv->mode == MQ_MG_MODE) {
1844 baddr = ®s->txic0;
1845 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) {
1846 gfar_write(baddr + i, 0);
1847 if (likely(priv->tx_queue[i]->txcoalescing))
1848 gfar_write(baddr + i, priv->tx_queue[i]->txic);
1851 baddr = ®s->rxic0;
1852 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) {
1853 gfar_write(baddr + i, 0);
1854 if (likely(priv->rx_queue[i]->rxcoalescing))
1855 gfar_write(baddr + i, priv->rx_queue[i]->rxic);
1860 static int register_grp_irqs(struct gfar_priv_grp *grp)
1862 struct gfar_private *priv = grp->priv;
1863 struct net_device *dev = priv->ndev;
1866 /* If the device has multiple interrupts, register for
1867 * them. Otherwise, only register for the one
1869 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1870 /* Install our interrupt handlers for Error,
1871 * Transmit, and Receive
1873 err = request_irq(gfar_irq(grp, ER)->irq, gfar_error, 0,
1874 gfar_irq(grp, ER)->name, grp);
1876 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1877 gfar_irq(grp, ER)->irq);
1881 err = request_irq(gfar_irq(grp, TX)->irq, gfar_transmit, 0,
1882 gfar_irq(grp, TX)->name, grp);
1884 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1885 gfar_irq(grp, TX)->irq);
1888 err = request_irq(gfar_irq(grp, RX)->irq, gfar_receive, 0,
1889 gfar_irq(grp, RX)->name, grp);
1891 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1892 gfar_irq(grp, RX)->irq);
1896 err = request_irq(gfar_irq(grp, TX)->irq, gfar_interrupt, 0,
1897 gfar_irq(grp, TX)->name, grp);
1899 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1900 gfar_irq(grp, TX)->irq);
1908 free_irq(gfar_irq(grp, TX)->irq, grp);
1910 free_irq(gfar_irq(grp, ER)->irq, grp);
1916 /* Bring the controller up and running */
1917 int startup_gfar(struct net_device *ndev)
1919 struct gfar_private *priv = netdev_priv(ndev);
1920 struct gfar __iomem *regs = NULL;
1923 for (i = 0; i < priv->num_grps; i++) {
1924 regs= priv->gfargrp[i].regs;
1925 gfar_write(®s->imask, IMASK_INIT_CLEAR);
1928 regs= priv->gfargrp[0].regs;
1929 err = gfar_alloc_skb_resources(ndev);
1933 gfar_init_mac(ndev);
1935 for (i = 0; i < priv->num_grps; i++) {
1936 err = register_grp_irqs(&priv->gfargrp[i]);
1938 for (j = 0; j < i; j++)
1939 free_grp_irqs(&priv->gfargrp[j]);
1944 /* Start the controller */
1947 phy_start(priv->phydev);
1949 gfar_configure_coalescing(priv, 0xFF, 0xFF);
1954 free_skb_resources(priv);
1958 /* Called when something needs to use the ethernet device
1959 * Returns 0 for success.
1961 static int gfar_enet_open(struct net_device *dev)
1963 struct gfar_private *priv = netdev_priv(dev);
1968 /* Initialize a bunch of registers */
1969 init_registers(dev);
1971 gfar_set_mac_address(dev);
1973 err = init_phy(dev);
1980 err = startup_gfar(dev);
1986 netif_tx_start_all_queues(dev);
1988 device_set_wakeup_enable(&dev->dev, priv->wol_en);
1993 static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
1995 struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
1997 memset(fcb, 0, GMAC_FCB_LEN);
2002 static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb,
2005 /* If we're here, it's a IP packet with a TCP or UDP
2006 * payload. We set it to checksum, using a pseudo-header
2009 u8 flags = TXFCB_DEFAULT;
2011 /* Tell the controller what the protocol is
2012 * And provide the already calculated phcs
2014 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
2016 fcb->phcs = udp_hdr(skb)->check;
2018 fcb->phcs = tcp_hdr(skb)->check;
2020 /* l3os is the distance between the start of the
2021 * frame (skb->data) and the start of the IP hdr.
2022 * l4os is the distance between the start of the
2023 * l3 hdr and the l4 hdr
2025 fcb->l3os = (u16)(skb_network_offset(skb) - fcb_length);
2026 fcb->l4os = skb_network_header_len(skb);
2031 void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
2033 fcb->flags |= TXFCB_VLN;
2034 fcb->vlctl = vlan_tx_tag_get(skb);
2037 static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
2038 struct txbd8 *base, int ring_size)
2040 struct txbd8 *new_bd = bdp + stride;
2042 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
2045 static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
2048 return skip_txbd(bdp, 1, base, ring_size);
2051 /* This is called by the kernel when a frame is ready for transmission.
2052 * It is pointed to by the dev->hard_start_xmit function pointer
2054 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
2056 struct gfar_private *priv = netdev_priv(dev);
2057 struct gfar_priv_tx_q *tx_queue = NULL;
2058 struct netdev_queue *txq;
2059 struct gfar __iomem *regs = NULL;
2060 struct txfcb *fcb = NULL;
2061 struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
2063 int i, rq = 0, do_tstamp = 0;
2065 unsigned long flags;
2066 unsigned int nr_frags, nr_txbds, length, fcb_length = GMAC_FCB_LEN;
2068 /* TOE=1 frames larger than 2500 bytes may see excess delays
2069 * before start of transmission.
2071 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) &&
2072 skb->ip_summed == CHECKSUM_PARTIAL &&
2076 ret = skb_checksum_help(skb);
2081 rq = skb->queue_mapping;
2082 tx_queue = priv->tx_queue[rq];
2083 txq = netdev_get_tx_queue(dev, rq);
2084 base = tx_queue->tx_bd_base;
2085 regs = tx_queue->grp->regs;
2087 /* check if time stamp should be generated */
2088 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
2089 priv->hwts_tx_en)) {
2091 fcb_length = GMAC_FCB_LEN + GMAC_TXPAL_LEN;
2094 /* make space for additional header when fcb is needed */
2095 if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
2096 vlan_tx_tag_present(skb) ||
2097 unlikely(do_tstamp)) &&
2098 (skb_headroom(skb) < fcb_length)) {
2099 struct sk_buff *skb_new;
2101 skb_new = skb_realloc_headroom(skb, fcb_length);
2103 dev->stats.tx_errors++;
2105 return NETDEV_TX_OK;
2109 skb_set_owner_w(skb_new, skb->sk);
2114 /* total number of fragments in the SKB */
2115 nr_frags = skb_shinfo(skb)->nr_frags;
2117 /* calculate the required number of TxBDs for this skb */
2118 if (unlikely(do_tstamp))
2119 nr_txbds = nr_frags + 2;
2121 nr_txbds = nr_frags + 1;
2123 /* check if there is space to queue this packet */
2124 if (nr_txbds > tx_queue->num_txbdfree) {
2125 /* no space, stop the queue */
2126 netif_tx_stop_queue(txq);
2127 dev->stats.tx_fifo_errors++;
2128 return NETDEV_TX_BUSY;
2131 /* Update transmit stats */
2132 tx_queue->stats.tx_bytes += skb->len;
2133 tx_queue->stats.tx_packets++;
2135 txbdp = txbdp_start = tx_queue->cur_tx;
2136 lstatus = txbdp->lstatus;
2138 /* Time stamp insertion requires one additional TxBD */
2139 if (unlikely(do_tstamp))
2140 txbdp_tstamp = txbdp = next_txbd(txbdp, base,
2141 tx_queue->tx_ring_size);
2143 if (nr_frags == 0) {
2144 if (unlikely(do_tstamp))
2145 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
2148 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2150 /* Place the fragment addresses and lengths into the TxBDs */
2151 for (i = 0; i < nr_frags; i++) {
2152 /* Point at the next BD, wrapping as needed */
2153 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size);
2155 length = skb_shinfo(skb)->frags[i].size;
2157 lstatus = txbdp->lstatus | length |
2158 BD_LFLAG(TXBD_READY);
2160 /* Handle the last BD specially */
2161 if (i == nr_frags - 1)
2162 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2164 bufaddr = skb_frag_dma_map(priv->dev,
2165 &skb_shinfo(skb)->frags[i],
2170 /* set the TxBD length and buffer pointer */
2171 txbdp->bufPtr = bufaddr;
2172 txbdp->lstatus = lstatus;
2175 lstatus = txbdp_start->lstatus;
2178 /* Add TxPAL between FCB and frame if required */
2179 if (unlikely(do_tstamp)) {
2180 skb_push(skb, GMAC_TXPAL_LEN);
2181 memset(skb->data, 0, GMAC_TXPAL_LEN);
2184 /* Set up checksumming */
2185 if (CHECKSUM_PARTIAL == skb->ip_summed) {
2186 fcb = gfar_add_fcb(skb);
2187 /* as specified by errata */
2188 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12) &&
2189 ((unsigned long)fcb % 0x20) > 0x18)) {
2190 __skb_pull(skb, GMAC_FCB_LEN);
2191 skb_checksum_help(skb);
2193 lstatus |= BD_LFLAG(TXBD_TOE);
2194 gfar_tx_checksum(skb, fcb, fcb_length);
2198 if (vlan_tx_tag_present(skb)) {
2199 if (unlikely(NULL == fcb)) {
2200 fcb = gfar_add_fcb(skb);
2201 lstatus |= BD_LFLAG(TXBD_TOE);
2204 gfar_tx_vlan(skb, fcb);
2207 /* Setup tx hardware time stamping if requested */
2208 if (unlikely(do_tstamp)) {
2209 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2211 fcb = gfar_add_fcb(skb);
2213 lstatus |= BD_LFLAG(TXBD_TOE);
2216 txbdp_start->bufPtr = dma_map_single(priv->dev, skb->data,
2217 skb_headlen(skb), DMA_TO_DEVICE);
2219 /* If time stamping is requested one additional TxBD must be set up. The
2220 * first TxBD points to the FCB and must have a data length of
2221 * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
2222 * the full frame length.
2224 if (unlikely(do_tstamp)) {
2225 txbdp_tstamp->bufPtr = txbdp_start->bufPtr + fcb_length;
2226 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
2227 (skb_headlen(skb) - fcb_length);
2228 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
2230 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
2233 netdev_tx_sent_queue(txq, skb->len);
2235 /* We can work in parallel with gfar_clean_tx_ring(), except
2236 * when modifying num_txbdfree. Note that we didn't grab the lock
2237 * when we were reading the num_txbdfree and checking for available
2238 * space, that's because outside of this function it can only grow,
2239 * and once we've got needed space, it cannot suddenly disappear.
2241 * The lock also protects us from gfar_error(), which can modify
2242 * regs->tstat and thus retrigger the transfers, which is why we
2243 * also must grab the lock before setting ready bit for the first
2244 * to be transmitted BD.
2246 spin_lock_irqsave(&tx_queue->txlock, flags);
2248 /* The powerpc-specific eieio() is used, as wmb() has too strong
2249 * semantics (it requires synchronization between cacheable and
2250 * uncacheable mappings, which eieio doesn't provide and which we
2251 * don't need), thus requiring a more expensive sync instruction. At
2252 * some point, the set of architecture-independent barrier functions
2253 * should be expanded to include weaker barriers.
2257 txbdp_start->lstatus = lstatus;
2259 eieio(); /* force lstatus write before tx_skbuff */
2261 tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb;
2263 /* Update the current skb pointer to the next entry we will use
2264 * (wrapping if necessary)
2266 tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) &
2267 TX_RING_MOD_MASK(tx_queue->tx_ring_size);
2269 tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
2271 /* reduce TxBD free count */
2272 tx_queue->num_txbdfree -= (nr_txbds);
2274 /* If the next BD still needs to be cleaned up, then the bds
2275 * are full. We need to tell the kernel to stop sending us stuff.
2277 if (!tx_queue->num_txbdfree) {
2278 netif_tx_stop_queue(txq);
2280 dev->stats.tx_fifo_errors++;
2283 /* Tell the DMA to go go go */
2284 gfar_write(®s->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex);
2287 spin_unlock_irqrestore(&tx_queue->txlock, flags);
2289 return NETDEV_TX_OK;
2292 /* Stops the kernel queue, and halts the controller */
2293 static int gfar_close(struct net_device *dev)
2295 struct gfar_private *priv = netdev_priv(dev);
2299 cancel_work_sync(&priv->reset_task);
2302 /* Disconnect from the PHY */
2303 phy_disconnect(priv->phydev);
2304 priv->phydev = NULL;
2306 netif_tx_stop_all_queues(dev);
2311 /* Changes the mac address if the controller is not running. */
2312 static int gfar_set_mac_address(struct net_device *dev)
2314 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
2319 /* Check if rx parser should be activated */
2320 void gfar_check_rx_parser_mode(struct gfar_private *priv)
2322 struct gfar __iomem *regs;
2325 regs = priv->gfargrp[0].regs;
2327 tempval = gfar_read(®s->rctrl);
2328 /* If parse is no longer required, then disable parser */
2329 if (tempval & RCTRL_REQ_PARSER)
2330 tempval |= RCTRL_PRSDEP_INIT;
2332 tempval &= ~RCTRL_PRSDEP_INIT;
2333 gfar_write(®s->rctrl, tempval);
2336 /* Enables and disables VLAN insertion/extraction */
2337 void gfar_vlan_mode(struct net_device *dev, netdev_features_t features)
2339 struct gfar_private *priv = netdev_priv(dev);
2340 struct gfar __iomem *regs = NULL;
2341 unsigned long flags;
2344 regs = priv->gfargrp[0].regs;
2345 local_irq_save(flags);
2348 if (features & NETIF_F_HW_VLAN_TX) {
2349 /* Enable VLAN tag insertion */
2350 tempval = gfar_read(®s->tctrl);
2351 tempval |= TCTRL_VLINS;
2352 gfar_write(®s->tctrl, tempval);
2354 /* Disable VLAN tag insertion */
2355 tempval = gfar_read(®s->tctrl);
2356 tempval &= ~TCTRL_VLINS;
2357 gfar_write(®s->tctrl, tempval);
2360 if (features & NETIF_F_HW_VLAN_RX) {
2361 /* Enable VLAN tag extraction */
2362 tempval = gfar_read(®s->rctrl);
2363 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
2364 gfar_write(®s->rctrl, tempval);
2366 /* Disable VLAN tag extraction */
2367 tempval = gfar_read(®s->rctrl);
2368 tempval &= ~RCTRL_VLEX;
2369 gfar_write(®s->rctrl, tempval);
2371 gfar_check_rx_parser_mode(priv);
2374 gfar_change_mtu(dev, dev->mtu);
2377 local_irq_restore(flags);
2380 static int gfar_change_mtu(struct net_device *dev, int new_mtu)
2382 int tempsize, tempval;
2383 struct gfar_private *priv = netdev_priv(dev);
2384 struct gfar __iomem *regs = priv->gfargrp[0].regs;
2385 int oldsize = priv->rx_buffer_size;
2386 int frame_size = new_mtu + ETH_HLEN;
2388 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
2389 netif_err(priv, drv, dev, "Invalid MTU setting\n");
2393 if (gfar_uses_fcb(priv))
2394 frame_size += GMAC_FCB_LEN;
2396 frame_size += priv->padding;
2398 tempsize = (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
2399 INCREMENTAL_BUFFER_SIZE;
2401 /* Only stop and start the controller if it isn't already
2402 * stopped, and we changed something
2404 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2407 priv->rx_buffer_size = tempsize;
2411 gfar_write(®s->mrblr, priv->rx_buffer_size);
2412 gfar_write(®s->maxfrm, priv->rx_buffer_size);
2414 /* If the mtu is larger than the max size for standard
2415 * ethernet frames (ie, a jumbo frame), then set maccfg2
2416 * to allow huge frames, and to check the length
2418 tempval = gfar_read(®s->maccfg2);
2420 if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE ||
2421 gfar_has_errata(priv, GFAR_ERRATA_74))
2422 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2424 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2426 gfar_write(®s->maccfg2, tempval);
2428 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2434 /* gfar_reset_task gets scheduled when a packet has not been
2435 * transmitted after a set amount of time.
2436 * For now, assume that clearing out all the structures, and
2437 * starting over will fix the problem.
2439 static void gfar_reset_task(struct work_struct *work)
2441 struct gfar_private *priv = container_of(work, struct gfar_private,
2443 struct net_device *dev = priv->ndev;
2445 if (dev->flags & IFF_UP) {
2446 netif_tx_stop_all_queues(dev);
2449 netif_tx_start_all_queues(dev);
2452 netif_tx_schedule_all(dev);
2455 static void gfar_timeout(struct net_device *dev)
2457 struct gfar_private *priv = netdev_priv(dev);
2459 dev->stats.tx_errors++;
2460 schedule_work(&priv->reset_task);
2463 static void gfar_align_skb(struct sk_buff *skb)
2465 /* We need the data buffer to be aligned properly. We will reserve
2466 * as many bytes as needed to align the data properly
2468 skb_reserve(skb, RXBUF_ALIGNMENT -
2469 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)));
2472 /* Interrupt Handler for Transmit complete */
2473 static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
2475 struct net_device *dev = tx_queue->dev;
2476 struct netdev_queue *txq;
2477 struct gfar_private *priv = netdev_priv(dev);
2478 struct gfar_priv_rx_q *rx_queue = NULL;
2479 struct txbd8 *bdp, *next = NULL;
2480 struct txbd8 *lbdp = NULL;
2481 struct txbd8 *base = tx_queue->tx_bd_base;
2482 struct sk_buff *skb;
2484 int tx_ring_size = tx_queue->tx_ring_size;
2485 int frags = 0, nr_txbds = 0;
2488 int tqi = tx_queue->qindex;
2489 unsigned int bytes_sent = 0;
2493 rx_queue = priv->rx_queue[tqi];
2494 txq = netdev_get_tx_queue(dev, tqi);
2495 bdp = tx_queue->dirty_tx;
2496 skb_dirtytx = tx_queue->skb_dirtytx;
2498 while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) {
2499 unsigned long flags;
2501 frags = skb_shinfo(skb)->nr_frags;
2503 /* When time stamping, one additional TxBD must be freed.
2504 * Also, we need to dma_unmap_single() the TxPAL.
2506 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
2507 nr_txbds = frags + 2;
2509 nr_txbds = frags + 1;
2511 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
2513 lstatus = lbdp->lstatus;
2515 /* Only clean completed frames */
2516 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
2517 (lstatus & BD_LENGTH_MASK))
2520 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
2521 next = next_txbd(bdp, base, tx_ring_size);
2522 buflen = next->length + GMAC_FCB_LEN + GMAC_TXPAL_LEN;
2524 buflen = bdp->length;
2526 dma_unmap_single(priv->dev, bdp->bufPtr,
2527 buflen, DMA_TO_DEVICE);
2529 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
2530 struct skb_shared_hwtstamps shhwtstamps;
2531 u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
2533 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
2534 shhwtstamps.hwtstamp = ns_to_ktime(*ns);
2535 skb_pull(skb, GMAC_FCB_LEN + GMAC_TXPAL_LEN);
2536 skb_tstamp_tx(skb, &shhwtstamps);
2537 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2541 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2542 bdp = next_txbd(bdp, base, tx_ring_size);
2544 for (i = 0; i < frags; i++) {
2545 dma_unmap_page(priv->dev, bdp->bufPtr,
2546 bdp->length, DMA_TO_DEVICE);
2547 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2548 bdp = next_txbd(bdp, base, tx_ring_size);
2551 bytes_sent += skb->len;
2553 dev_kfree_skb_any(skb);
2555 tx_queue->tx_skbuff[skb_dirtytx] = NULL;
2557 skb_dirtytx = (skb_dirtytx + 1) &
2558 TX_RING_MOD_MASK(tx_ring_size);
2561 spin_lock_irqsave(&tx_queue->txlock, flags);
2562 tx_queue->num_txbdfree += nr_txbds;
2563 spin_unlock_irqrestore(&tx_queue->txlock, flags);
2566 /* If we freed a buffer, we can restart transmission, if necessary */
2567 if (netif_tx_queue_stopped(txq) && tx_queue->num_txbdfree)
2568 netif_wake_subqueue(dev, tqi);
2570 /* Update dirty indicators */
2571 tx_queue->skb_dirtytx = skb_dirtytx;
2572 tx_queue->dirty_tx = bdp;
2574 netdev_tx_completed_queue(txq, howmany, bytes_sent);
2579 static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
2581 unsigned long flags;
2583 spin_lock_irqsave(&gfargrp->grplock, flags);
2584 if (napi_schedule_prep(&gfargrp->napi)) {
2585 gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED);
2586 __napi_schedule(&gfargrp->napi);
2588 /* Clear IEVENT, so interrupts aren't called again
2589 * because of the packets that have already arrived.
2591 gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK);
2593 spin_unlock_irqrestore(&gfargrp->grplock, flags);
2597 /* Interrupt Handler for Transmit complete */
2598 static irqreturn_t gfar_transmit(int irq, void *grp_id)
2600 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
2604 static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
2605 struct sk_buff *skb)
2607 struct net_device *dev = rx_queue->dev;
2608 struct gfar_private *priv = netdev_priv(dev);
2611 buf = dma_map_single(priv->dev, skb->data,
2612 priv->rx_buffer_size, DMA_FROM_DEVICE);
2613 gfar_init_rxbdp(rx_queue, bdp, buf);
2616 static struct sk_buff *gfar_alloc_skb(struct net_device *dev)
2618 struct gfar_private *priv = netdev_priv(dev);
2619 struct sk_buff *skb;
2621 skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
2625 gfar_align_skb(skb);
2630 struct sk_buff *gfar_new_skb(struct net_device *dev)
2632 return gfar_alloc_skb(dev);
2635 static inline void count_errors(unsigned short status, struct net_device *dev)
2637 struct gfar_private *priv = netdev_priv(dev);
2638 struct net_device_stats *stats = &dev->stats;
2639 struct gfar_extra_stats *estats = &priv->extra_stats;
2641 /* If the packet was truncated, none of the other errors matter */
2642 if (status & RXBD_TRUNCATED) {
2643 stats->rx_length_errors++;
2645 atomic64_inc(&estats->rx_trunc);
2649 /* Count the errors, if there were any */
2650 if (status & (RXBD_LARGE | RXBD_SHORT)) {
2651 stats->rx_length_errors++;
2653 if (status & RXBD_LARGE)
2654 atomic64_inc(&estats->rx_large);
2656 atomic64_inc(&estats->rx_short);
2658 if (status & RXBD_NONOCTET) {
2659 stats->rx_frame_errors++;
2660 atomic64_inc(&estats->rx_nonoctet);
2662 if (status & RXBD_CRCERR) {
2663 atomic64_inc(&estats->rx_crcerr);
2664 stats->rx_crc_errors++;
2666 if (status & RXBD_OVERRUN) {
2667 atomic64_inc(&estats->rx_overrun);
2668 stats->rx_crc_errors++;
2672 irqreturn_t gfar_receive(int irq, void *grp_id)
2674 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
2678 static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
2680 /* If valid headers were found, and valid sums
2681 * were verified, then we tell the kernel that no
2682 * checksumming is necessary. Otherwise, it is [FIXME]
2684 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
2685 skb->ip_summed = CHECKSUM_UNNECESSARY;
2687 skb_checksum_none_assert(skb);
2691 /* gfar_process_frame() -- handle one incoming packet if skb isn't NULL. */
2692 static void gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
2693 int amount_pull, struct napi_struct *napi)
2695 struct gfar_private *priv = netdev_priv(dev);
2696 struct rxfcb *fcb = NULL;
2700 /* fcb is at the beginning if exists */
2701 fcb = (struct rxfcb *)skb->data;
2703 /* Remove the FCB from the skb
2704 * Remove the padded bytes, if there are any
2707 skb_record_rx_queue(skb, fcb->rq);
2708 skb_pull(skb, amount_pull);
2711 /* Get receive timestamp from the skb */
2712 if (priv->hwts_rx_en) {
2713 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
2714 u64 *ns = (u64 *) skb->data;
2716 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
2717 shhwtstamps->hwtstamp = ns_to_ktime(*ns);
2721 skb_pull(skb, priv->padding);
2723 if (dev->features & NETIF_F_RXCSUM)
2724 gfar_rx_checksum(skb, fcb);
2726 /* Tell the skb what kind of packet this is */
2727 skb->protocol = eth_type_trans(skb, dev);
2729 /* There's need to check for NETIF_F_HW_VLAN_RX here.
2730 * Even if vlan rx accel is disabled, on some chips
2731 * RXFCB_VLN is pseudo randomly set.
2733 if (dev->features & NETIF_F_HW_VLAN_RX &&
2734 fcb->flags & RXFCB_VLN)
2735 __vlan_hwaccel_put_tag(skb, fcb->vlctl);
2737 /* Send the packet up the stack */
2738 ret = napi_gro_receive(napi, skb);
2740 if (unlikely(GRO_DROP == ret))
2741 atomic64_inc(&priv->extra_stats.kernel_dropped);
2744 /* gfar_clean_rx_ring() -- Processes each frame in the rx ring
2745 * until the budget/quota has been reached. Returns the number
2748 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
2750 struct net_device *dev = rx_queue->dev;
2751 struct rxbd8 *bdp, *base;
2752 struct sk_buff *skb;
2756 struct gfar_private *priv = netdev_priv(dev);
2758 /* Get the first full descriptor */
2759 bdp = rx_queue->cur_rx;
2760 base = rx_queue->rx_bd_base;
2762 amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0);
2764 while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
2765 struct sk_buff *newskb;
2769 /* Add another skb for the future */
2770 newskb = gfar_new_skb(dev);
2772 skb = rx_queue->rx_skbuff[rx_queue->skb_currx];
2774 dma_unmap_single(priv->dev, bdp->bufPtr,
2775 priv->rx_buffer_size, DMA_FROM_DEVICE);
2777 if (unlikely(!(bdp->status & RXBD_ERR) &&
2778 bdp->length > priv->rx_buffer_size))
2779 bdp->status = RXBD_LARGE;
2781 /* We drop the frame if we failed to allocate a new buffer */
2782 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
2783 bdp->status & RXBD_ERR)) {
2784 count_errors(bdp->status, dev);
2786 if (unlikely(!newskb))
2791 /* Increment the number of packets */
2792 rx_queue->stats.rx_packets++;
2796 pkt_len = bdp->length - ETH_FCS_LEN;
2797 /* Remove the FCS from the packet length */
2798 skb_put(skb, pkt_len);
2799 rx_queue->stats.rx_bytes += pkt_len;
2800 skb_record_rx_queue(skb, rx_queue->qindex);
2801 gfar_process_frame(dev, skb, amount_pull,
2802 &rx_queue->grp->napi);
2805 netif_warn(priv, rx_err, dev, "Missing skb!\n");
2806 rx_queue->stats.rx_dropped++;
2807 atomic64_inc(&priv->extra_stats.rx_skbmissing);
2812 rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb;
2814 /* Setup the new bdp */
2815 gfar_new_rxbdp(rx_queue, bdp, newskb);
2817 /* Update to the next pointer */
2818 bdp = next_bd(bdp, base, rx_queue->rx_ring_size);
2820 /* update to point at the next skb */
2821 rx_queue->skb_currx = (rx_queue->skb_currx + 1) &
2822 RX_RING_MOD_MASK(rx_queue->rx_ring_size);
2825 /* Update the current rxbd pointer to be the next one */
2826 rx_queue->cur_rx = bdp;
2831 static int gfar_poll(struct napi_struct *napi, int budget)
2833 struct gfar_priv_grp *gfargrp =
2834 container_of(napi, struct gfar_priv_grp, napi);
2835 struct gfar_private *priv = gfargrp->priv;
2836 struct gfar __iomem *regs = gfargrp->regs;
2837 struct gfar_priv_tx_q *tx_queue = NULL;
2838 struct gfar_priv_rx_q *rx_queue = NULL;
2839 int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
2840 int tx_cleaned = 0, i, left_over_budget = budget;
2841 unsigned long serviced_queues = 0;
2844 num_queues = gfargrp->num_rx_queues;
2845 budget_per_queue = budget/num_queues;
2847 /* Clear IEVENT, so interrupts aren't called again
2848 * because of the packets that have already arrived
2850 gfar_write(®s->ievent, IEVENT_RTX_MASK);
2852 while (num_queues && left_over_budget) {
2853 budget_per_queue = left_over_budget/num_queues;
2854 left_over_budget = 0;
2856 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
2857 if (test_bit(i, &serviced_queues))
2859 rx_queue = priv->rx_queue[i];
2860 tx_queue = priv->tx_queue[rx_queue->qindex];
2862 tx_cleaned += gfar_clean_tx_ring(tx_queue);
2863 rx_cleaned_per_queue =
2864 gfar_clean_rx_ring(rx_queue, budget_per_queue);
2865 rx_cleaned += rx_cleaned_per_queue;
2866 if (rx_cleaned_per_queue < budget_per_queue) {
2867 left_over_budget = left_over_budget +
2869 rx_cleaned_per_queue);
2870 set_bit(i, &serviced_queues);
2879 if (rx_cleaned < budget) {
2880 napi_complete(napi);
2882 /* Clear the halt bit in RSTAT */
2883 gfar_write(®s->rstat, gfargrp->rstat);
2885 gfar_write(®s->imask, IMASK_DEFAULT);
2887 /* If we are coalescing interrupts, update the timer
2888 * Otherwise, clear it
2890 gfar_configure_coalescing(priv, gfargrp->rx_bit_map,
2891 gfargrp->tx_bit_map);
2897 #ifdef CONFIG_NET_POLL_CONTROLLER
2898 /* Polling 'interrupt' - used by things like netconsole to send skbs
2899 * without having to re-enable interrupts. It's not called while
2900 * the interrupt routine is executing.
2902 static void gfar_netpoll(struct net_device *dev)
2904 struct gfar_private *priv = netdev_priv(dev);
2907 /* If the device has multiple interrupts, run tx/rx */
2908 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
2909 for (i = 0; i < priv->num_grps; i++) {
2910 disable_irq(priv->gfargrp[i].interruptTransmit);
2911 disable_irq(priv->gfargrp[i].interruptReceive);
2912 disable_irq(priv->gfargrp[i].interruptError);
2913 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2915 enable_irq(priv->gfargrp[i].interruptError);
2916 enable_irq(priv->gfargrp[i].interruptReceive);
2917 enable_irq(priv->gfargrp[i].interruptTransmit);
2920 for (i = 0; i < priv->num_grps; i++) {
2921 disable_irq(priv->gfargrp[i].interruptTransmit);
2922 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2924 enable_irq(priv->gfargrp[i].interruptTransmit);
2930 /* The interrupt handler for devices with one interrupt */
2931 static irqreturn_t gfar_interrupt(int irq, void *grp_id)
2933 struct gfar_priv_grp *gfargrp = grp_id;
2935 /* Save ievent for future reference */
2936 u32 events = gfar_read(&gfargrp->regs->ievent);
2938 /* Check for reception */
2939 if (events & IEVENT_RX_MASK)
2940 gfar_receive(irq, grp_id);
2942 /* Check for transmit completion */
2943 if (events & IEVENT_TX_MASK)
2944 gfar_transmit(irq, grp_id);
2946 /* Check for errors */
2947 if (events & IEVENT_ERR_MASK)
2948 gfar_error(irq, grp_id);
2953 /* Called every time the controller might need to be made
2954 * aware of new link state. The PHY code conveys this
2955 * information through variables in the phydev structure, and this
2956 * function converts those variables into the appropriate
2957 * register values, and can bring down the device if needed.
2959 static void adjust_link(struct net_device *dev)
2961 struct gfar_private *priv = netdev_priv(dev);
2962 struct gfar __iomem *regs = priv->gfargrp[0].regs;
2963 unsigned long flags;
2964 struct phy_device *phydev = priv->phydev;
2967 local_irq_save(flags);
2971 u32 tempval = gfar_read(®s->maccfg2);
2972 u32 ecntrl = gfar_read(®s->ecntrl);
2974 /* Now we make sure that we can be in full duplex mode.
2975 * If not, we operate in half-duplex mode.
2977 if (phydev->duplex != priv->oldduplex) {
2979 if (!(phydev->duplex))
2980 tempval &= ~(MACCFG2_FULL_DUPLEX);
2982 tempval |= MACCFG2_FULL_DUPLEX;
2984 priv->oldduplex = phydev->duplex;
2987 if (phydev->speed != priv->oldspeed) {
2989 switch (phydev->speed) {
2992 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
2994 ecntrl &= ~(ECNTRL_R100);
2999 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
3001 /* Reduced mode distinguishes
3002 * between 10 and 100
3004 if (phydev->speed == SPEED_100)
3005 ecntrl |= ECNTRL_R100;
3007 ecntrl &= ~(ECNTRL_R100);
3010 netif_warn(priv, link, dev,
3011 "Ack! Speed (%d) is not 10/100/1000!\n",
3016 priv->oldspeed = phydev->speed;
3019 gfar_write(®s->maccfg2, tempval);
3020 gfar_write(®s->ecntrl, ecntrl);
3022 if (!priv->oldlink) {
3026 } else if (priv->oldlink) {
3030 priv->oldduplex = -1;
3033 if (new_state && netif_msg_link(priv))
3034 phy_print_status(phydev);
3036 local_irq_restore(flags);
3039 /* Update the hash table based on the current list of multicast
3040 * addresses we subscribe to. Also, change the promiscuity of
3041 * the device based on the flags (this function is called
3042 * whenever dev->flags is changed
3044 static void gfar_set_multi(struct net_device *dev)
3046 struct netdev_hw_addr *ha;
3047 struct gfar_private *priv = netdev_priv(dev);
3048 struct gfar __iomem *regs = priv->gfargrp[0].regs;
3051 if (dev->flags & IFF_PROMISC) {
3052 /* Set RCTRL to PROM */
3053 tempval = gfar_read(®s->rctrl);
3054 tempval |= RCTRL_PROM;
3055 gfar_write(®s->rctrl, tempval);
3057 /* Set RCTRL to not PROM */
3058 tempval = gfar_read(®s->rctrl);
3059 tempval &= ~(RCTRL_PROM);
3060 gfar_write(®s->rctrl, tempval);
3063 if (dev->flags & IFF_ALLMULTI) {
3064 /* Set the hash to rx all multicast frames */
3065 gfar_write(®s->igaddr0, 0xffffffff);
3066 gfar_write(®s->igaddr1, 0xffffffff);
3067 gfar_write(®s->igaddr2, 0xffffffff);
3068 gfar_write(®s->igaddr3, 0xffffffff);
3069 gfar_write(®s->igaddr4, 0xffffffff);
3070 gfar_write(®s->igaddr5, 0xffffffff);
3071 gfar_write(®s->igaddr6, 0xffffffff);
3072 gfar_write(®s->igaddr7, 0xffffffff);
3073 gfar_write(®s->gaddr0, 0xffffffff);
3074 gfar_write(®s->gaddr1, 0xffffffff);
3075 gfar_write(®s->gaddr2, 0xffffffff);
3076 gfar_write(®s->gaddr3, 0xffffffff);
3077 gfar_write(®s->gaddr4, 0xffffffff);
3078 gfar_write(®s->gaddr5, 0xffffffff);
3079 gfar_write(®s->gaddr6, 0xffffffff);
3080 gfar_write(®s->gaddr7, 0xffffffff);
3085 /* zero out the hash */
3086 gfar_write(®s->igaddr0, 0x0);
3087 gfar_write(®s->igaddr1, 0x0);
3088 gfar_write(®s->igaddr2, 0x0);
3089 gfar_write(®s->igaddr3, 0x0);
3090 gfar_write(®s->igaddr4, 0x0);
3091 gfar_write(®s->igaddr5, 0x0);
3092 gfar_write(®s->igaddr6, 0x0);
3093 gfar_write(®s->igaddr7, 0x0);
3094 gfar_write(®s->gaddr0, 0x0);
3095 gfar_write(®s->gaddr1, 0x0);
3096 gfar_write(®s->gaddr2, 0x0);
3097 gfar_write(®s->gaddr3, 0x0);
3098 gfar_write(®s->gaddr4, 0x0);
3099 gfar_write(®s->gaddr5, 0x0);
3100 gfar_write(®s->gaddr6, 0x0);
3101 gfar_write(®s->gaddr7, 0x0);
3103 /* If we have extended hash tables, we need to
3104 * clear the exact match registers to prepare for
3107 if (priv->extended_hash) {
3108 em_num = GFAR_EM_NUM + 1;
3109 gfar_clear_exact_match(dev);
3116 if (netdev_mc_empty(dev))
3119 /* Parse the list, and set the appropriate bits */
3120 netdev_for_each_mc_addr(ha, dev) {
3122 gfar_set_mac_for_addr(dev, idx, ha->addr);
3125 gfar_set_hash_for_addr(dev, ha->addr);
3131 /* Clears each of the exact match registers to zero, so they
3132 * don't interfere with normal reception
3134 static void gfar_clear_exact_match(struct net_device *dev)
3137 static const u8 zero_arr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
3139 for (idx = 1; idx < GFAR_EM_NUM + 1; idx++)
3140 gfar_set_mac_for_addr(dev, idx, zero_arr);
3143 /* Set the appropriate hash bit for the given addr */
3144 /* The algorithm works like so:
3145 * 1) Take the Destination Address (ie the multicast address), and
3146 * do a CRC on it (little endian), and reverse the bits of the
3148 * 2) Use the 8 most significant bits as a hash into a 256-entry
3149 * table. The table is controlled through 8 32-bit registers:
3150 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
3151 * gaddr7. This means that the 3 most significant bits in the
3152 * hash index which gaddr register to use, and the 5 other bits
3153 * indicate which bit (assuming an IBM numbering scheme, which
3154 * for PowerPC (tm) is usually the case) in the register holds
3157 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
3160 struct gfar_private *priv = netdev_priv(dev);
3161 u32 result = ether_crc(ETH_ALEN, addr);
3162 int width = priv->hash_width;
3163 u8 whichbit = (result >> (32 - width)) & 0x1f;
3164 u8 whichreg = result >> (32 - width + 5);
3165 u32 value = (1 << (31-whichbit));
3167 tempval = gfar_read(priv->hash_regs[whichreg]);
3169 gfar_write(priv->hash_regs[whichreg], tempval);
3173 /* There are multiple MAC Address register pairs on some controllers
3174 * This function sets the numth pair to a given address
3176 static void gfar_set_mac_for_addr(struct net_device *dev, int num,
3179 struct gfar_private *priv = netdev_priv(dev);
3180 struct gfar __iomem *regs = priv->gfargrp[0].regs;
3182 char tmpbuf[ETH_ALEN];
3184 u32 __iomem *macptr = ®s->macstnaddr1;
3188 /* Now copy it into the mac registers backwards, cuz
3189 * little endian is silly
3191 for (idx = 0; idx < ETH_ALEN; idx++)
3192 tmpbuf[ETH_ALEN - 1 - idx] = addr[idx];
3194 gfar_write(macptr, *((u32 *) (tmpbuf)));
3196 tempval = *((u32 *) (tmpbuf + 4));
3198 gfar_write(macptr+1, tempval);
3201 /* GFAR error interrupt handler */
3202 static irqreturn_t gfar_error(int irq, void *grp_id)
3204 struct gfar_priv_grp *gfargrp = grp_id;
3205 struct gfar __iomem *regs = gfargrp->regs;
3206 struct gfar_private *priv= gfargrp->priv;
3207 struct net_device *dev = priv->ndev;
3209 /* Save ievent for future reference */
3210 u32 events = gfar_read(®s->ievent);
3213 gfar_write(®s->ievent, events & IEVENT_ERR_MASK);
3215 /* Magic Packet is not an error. */
3216 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
3217 (events & IEVENT_MAG))
3218 events &= ~IEVENT_MAG;
3221 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
3223 "error interrupt (ievent=0x%08x imask=0x%08x)\n",
3224 events, gfar_read(®s->imask));
3226 /* Update the error counters */
3227 if (events & IEVENT_TXE) {
3228 dev->stats.tx_errors++;
3230 if (events & IEVENT_LC)
3231 dev->stats.tx_window_errors++;
3232 if (events & IEVENT_CRL)
3233 dev->stats.tx_aborted_errors++;
3234 if (events & IEVENT_XFUN) {
3235 unsigned long flags;
3237 netif_dbg(priv, tx_err, dev,
3238 "TX FIFO underrun, packet dropped\n");
3239 dev->stats.tx_dropped++;
3240 atomic64_inc(&priv->extra_stats.tx_underrun);
3242 local_irq_save(flags);
3245 /* Reactivate the Tx Queues */
3246 gfar_write(®s->tstat, gfargrp->tstat);
3249 local_irq_restore(flags);
3251 netif_dbg(priv, tx_err, dev, "Transmit Error\n");
3253 if (events & IEVENT_BSY) {
3254 dev->stats.rx_errors++;
3255 atomic64_inc(&priv->extra_stats.rx_bsy);
3257 gfar_receive(irq, grp_id);
3259 netif_dbg(priv, rx_err, dev, "busy error (rstat: %x)\n",
3260 gfar_read(®s->rstat));
3262 if (events & IEVENT_BABR) {
3263 dev->stats.rx_errors++;
3264 atomic64_inc(&priv->extra_stats.rx_babr);
3266 netif_dbg(priv, rx_err, dev, "babbling RX error\n");
3268 if (events & IEVENT_EBERR) {
3269 atomic64_inc(&priv->extra_stats.eberr);
3270 netif_dbg(priv, rx_err, dev, "bus error\n");
3272 if (events & IEVENT_RXC)
3273 netif_dbg(priv, rx_status, dev, "control frame\n");
3275 if (events & IEVENT_BABT) {
3276 atomic64_inc(&priv->extra_stats.tx_babt);
3277 netif_dbg(priv, tx_err, dev, "babbling TX error\n");
3282 static struct of_device_id gfar_match[] =
3286 .compatible = "gianfar",
3289 .compatible = "fsl,etsec2",
3293 MODULE_DEVICE_TABLE(of, gfar_match);
3295 /* Structure for a device driver */
3296 static struct platform_driver gfar_driver = {
3298 .name = "fsl-gianfar",
3299 .owner = THIS_MODULE,
3301 .of_match_table = gfar_match,
3303 .probe = gfar_probe,
3304 .remove = gfar_remove,
3307 module_platform_driver(gfar_driver);