2 * Copyright (C) 2006-2007 PA Semi, Inc
4 * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/dmaengine.h>
25 #include <linux/delay.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <asm/dma-mapping.h>
30 #include <linux/skbuff.h>
33 #include <linux/tcp.h>
34 #include <net/checksum.h>
38 #include "pasemi_mac.h"
43 * - Get rid of pci_{read,write}_config(), map registers with ioremap
48 * - Other performance improvements
52 /* Must be a power of two */
53 #define RX_RING_SIZE 512
54 #define TX_RING_SIZE 512
56 #define DEFAULT_MSG_ENABLE \
66 #define TX_DESC(mac, num) ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
67 #define TX_DESC_INFO(mac, num) ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
68 #define RX_DESC(mac, num) ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
69 #define RX_DESC_INFO(mac, num) ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
70 #define RX_BUFF(mac, num) ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
72 #define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
74 MODULE_LICENSE("GPL");
75 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
76 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
78 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
79 module_param(debug, int, 0);
80 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
82 static struct pasdma_status *dma_status;
84 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
86 struct pci_dev *pdev = mac->pdev;
87 struct device_node *dn = pci_device_to_OF_node(pdev);
93 "No device node for mac, not configuring\n");
97 maddr = get_property(dn, "mac-address", NULL);
100 "no mac address in device tree, not configuring\n");
104 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
105 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
107 "can't parse mac address, not configuring\n");
111 memcpy(mac->mac_addr, addr, sizeof(addr));
115 static int pasemi_mac_setup_rx_resources(struct net_device *dev)
117 struct pasemi_mac_rxring *ring;
118 struct pasemi_mac *mac = netdev_priv(dev);
119 int chan_id = mac->dma_rxch;
121 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
126 spin_lock_init(&ring->lock);
128 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
129 RX_RING_SIZE, GFP_KERNEL);
131 if (!ring->desc_info)
134 /* Allocate descriptors */
135 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
137 sizeof(struct pas_dma_xct_descr),
138 &ring->dma, GFP_KERNEL);
143 memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
145 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
146 RX_RING_SIZE * sizeof(u64),
147 &ring->buf_dma, GFP_KERNEL);
151 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
153 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEL(chan_id),
154 PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
156 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEU(chan_id),
157 PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
158 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
160 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_CFG(chan_id),
161 PAS_DMA_RXCHAN_CFG_HBU(1));
163 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEL(mac->dma_if),
164 PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
166 pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEU(mac->dma_if),
167 PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
168 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
170 ring->next_to_fill = 0;
171 ring->next_to_clean = 0;
173 snprintf(ring->irq_name, sizeof(ring->irq_name),
180 dma_free_coherent(&mac->dma_pdev->dev,
181 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
182 mac->rx->desc, mac->rx->dma);
184 kfree(ring->desc_info);
192 static int pasemi_mac_setup_tx_resources(struct net_device *dev)
194 struct pasemi_mac *mac = netdev_priv(dev);
196 int chan_id = mac->dma_txch;
197 struct pasemi_mac_txring *ring;
199 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
203 spin_lock_init(&ring->lock);
205 ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
206 TX_RING_SIZE, GFP_KERNEL);
207 if (!ring->desc_info)
210 /* Allocate descriptors */
211 ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
213 sizeof(struct pas_dma_xct_descr),
214 &ring->dma, GFP_KERNEL);
218 memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
220 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEL(chan_id),
221 PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
222 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
223 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
225 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEU(chan_id), val);
227 pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_CFG(chan_id),
228 PAS_DMA_TXCHAN_CFG_TY_IFACE |
229 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
230 PAS_DMA_TXCHAN_CFG_UP |
231 PAS_DMA_TXCHAN_CFG_WT(2));
233 ring->next_to_use = 0;
234 ring->next_to_clean = 0;
236 snprintf(ring->irq_name, sizeof(ring->irq_name),
243 kfree(ring->desc_info);
250 static void pasemi_mac_free_tx_resources(struct net_device *dev)
252 struct pasemi_mac *mac = netdev_priv(dev);
254 struct pasemi_mac_buffer *info;
255 struct pas_dma_xct_descr *dp;
257 for (i = 0; i < TX_RING_SIZE; i++) {
258 info = &TX_DESC_INFO(mac, i);
259 dp = &TX_DESC(mac, i);
262 pci_unmap_single(mac->dma_pdev,
266 dev_kfree_skb_any(info->skb);
275 dma_free_coherent(&mac->dma_pdev->dev,
276 TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
277 mac->tx->desc, mac->tx->dma);
279 kfree(mac->tx->desc_info);
284 static void pasemi_mac_free_rx_resources(struct net_device *dev)
286 struct pasemi_mac *mac = netdev_priv(dev);
288 struct pasemi_mac_buffer *info;
289 struct pas_dma_xct_descr *dp;
291 for (i = 0; i < RX_RING_SIZE; i++) {
292 info = &RX_DESC_INFO(mac, i);
293 dp = &RX_DESC(mac, i);
296 pci_unmap_single(mac->dma_pdev,
300 dev_kfree_skb_any(info->skb);
309 dma_free_coherent(&mac->dma_pdev->dev,
310 RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
311 mac->rx->desc, mac->rx->dma);
313 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
314 mac->rx->buffers, mac->rx->buf_dma);
316 kfree(mac->rx->desc_info);
321 static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
323 struct pasemi_mac *mac = netdev_priv(dev);
325 int start = mac->rx->next_to_fill;
326 unsigned int limit, count;
328 limit = (mac->rx->next_to_clean + RX_RING_SIZE -
329 mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
331 /* Check to see if we're doing first-time setup */
332 if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
333 limit = RX_RING_SIZE;
339 for (count = limit; count; count--) {
340 struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
341 u64 *buff = &RX_BUFF(mac, i);
345 /* skb might still be in there for recycle on short receives */
349 skb = dev_alloc_skb(BUF_SIZE);
354 dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
357 if (unlikely(dma_mapping_error(dma))) {
358 dev_kfree_skb_irq(info->skb);
364 *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
370 pci_write_config_dword(mac->dma_pdev,
371 PAS_DMA_RXCHAN_INCR(mac->dma_rxch),
373 pci_write_config_dword(mac->dma_pdev,
374 PAS_DMA_RXINT_INCR(mac->dma_if),
377 mac->rx->next_to_fill += limit - count;
380 static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
382 unsigned int reg, stat;
383 /* Re-enable packet count interrupts: finally
384 * ack the packet count interrupt we got in rx_intr.
387 pci_read_config_dword(mac->iob_pdev,
388 PAS_IOB_DMA_RXCH_STAT(mac->dma_rxch),
391 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(stat & PAS_IOB_DMA_RXCH_STAT_CNTDEL_M)
392 | PAS_IOB_DMA_RXCH_RESET_PINTC;
394 pci_write_config_dword(mac->iob_pdev,
395 PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
399 static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
401 unsigned int reg, stat;
403 /* Re-enable packet count interrupts */
404 pci_read_config_dword(mac->iob_pdev,
405 PAS_IOB_DMA_TXCH_STAT(mac->dma_txch), &stat);
407 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(stat & PAS_IOB_DMA_TXCH_STAT_CNTDEL_M)
408 | PAS_IOB_DMA_TXCH_RESET_PINTC;
410 pci_write_config_dword(mac->iob_pdev,
411 PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
415 static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
419 struct pas_dma_xct_descr *dp;
420 struct pasemi_mac_buffer *info;
426 spin_lock(&mac->rx->lock);
428 n = mac->rx->next_to_clean;
430 for (count = limit; count; count--) {
434 dp = &RX_DESC(mac, n);
437 if (!(macrx & XCT_MACRX_O))
443 /* We have to scan for our skb since there's no way
444 * to back-map them from the descriptor, and if we
445 * have several receive channels then they might not
446 * show up in the same order as they were put on the
450 dma = (dp->ptr & XCT_PTR_ADDR_M);
451 for (i = n; i < (n + RX_RING_SIZE); i++) {
452 info = &RX_DESC_INFO(mac, i);
453 if (info->dma == dma)
460 pci_unmap_single(mac->dma_pdev, dma, skb->len,
463 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
466 struct sk_buff *new_skb =
467 netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
469 skb_reserve(new_skb, NET_IP_ALIGN);
470 memcpy(new_skb->data - NET_IP_ALIGN,
471 skb->data - NET_IP_ALIGN,
473 /* save the skb in buffer_info as good */
476 /* else just continue with the old one */
482 skb->protocol = eth_type_trans(skb, mac->netdev);
484 if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
485 skb->ip_summed = CHECKSUM_COMPLETE;
486 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
489 skb->ip_summed = CHECKSUM_NONE;
491 mac->stats.rx_bytes += len;
492 mac->stats.rx_packets++;
494 netif_receive_skb(skb);
502 mac->rx->next_to_clean += limit - count;
503 pasemi_mac_replenish_rx_ring(mac->netdev);
505 spin_unlock(&mac->rx->lock);
510 static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
513 struct pasemi_mac_buffer *info;
514 struct pas_dma_xct_descr *dp;
518 spin_lock_irqsave(&mac->tx->lock, flags);
520 start = mac->tx->next_to_clean;
523 for (i = start; i < mac->tx->next_to_use; i++) {
524 dp = &TX_DESC(mac, i);
525 if (!dp || (dp->mactx & XCT_MACTX_O))
530 info = &TX_DESC_INFO(mac, i);
532 pci_unmap_single(mac->dma_pdev, info->dma,
533 info->skb->len, PCI_DMA_TODEVICE);
534 dev_kfree_skb_irq(info->skb);
541 mac->tx->next_to_clean += count;
542 spin_unlock_irqrestore(&mac->tx->lock, flags);
544 netif_wake_queue(mac->netdev);
550 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
552 struct net_device *dev = data;
553 struct pasemi_mac *mac = netdev_priv(dev);
556 if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
559 if (*mac->rx_status & PAS_STATUS_ERROR)
560 printk("rx_status reported error\n");
562 /* Don't reset packet count so it won't fire again but clear
566 pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), ®);
569 if (*mac->rx_status & PAS_STATUS_SOFT)
570 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
571 if (*mac->rx_status & PAS_STATUS_ERROR)
572 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
573 if (*mac->rx_status & PAS_STATUS_TIMER)
574 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
576 netif_rx_schedule(dev);
578 pci_write_config_dword(mac->iob_pdev,
579 PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
585 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
587 struct net_device *dev = data;
588 struct pasemi_mac *mac = netdev_priv(dev);
591 if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
594 pasemi_mac_clean_tx(mac);
596 reg = PAS_IOB_DMA_TXCH_RESET_PINTC;
598 if (*mac->tx_status & PAS_STATUS_SOFT)
599 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
600 if (*mac->tx_status & PAS_STATUS_ERROR)
601 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
603 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
609 static void pasemi_adjust_link(struct net_device *dev)
611 struct pasemi_mac *mac = netdev_priv(dev);
614 unsigned int new_flags;
616 if (!mac->phydev->link) {
617 /* If no link, MAC speed settings don't matter. Just report
618 * link down and return.
620 if (mac->link && netif_msg_link(mac))
621 printk(KERN_INFO "%s: Link is down.\n", dev->name);
623 netif_carrier_off(dev);
628 netif_carrier_on(dev);
630 pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
631 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
632 PAS_MAC_CFG_PCFG_TSR_M);
634 if (!mac->phydev->duplex)
635 new_flags |= PAS_MAC_CFG_PCFG_HD;
637 switch (mac->phydev->speed) {
639 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
640 PAS_MAC_CFG_PCFG_TSR_1G;
643 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
644 PAS_MAC_CFG_PCFG_TSR_100M;
647 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
648 PAS_MAC_CFG_PCFG_TSR_10M;
651 printk("Unsupported speed %d\n", mac->phydev->speed);
654 /* Print on link or speed/duplex change */
655 msg = mac->link != mac->phydev->link || flags != new_flags;
657 mac->duplex = mac->phydev->duplex;
658 mac->speed = mac->phydev->speed;
659 mac->link = mac->phydev->link;
661 if (new_flags != flags)
662 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
664 if (msg && netif_msg_link(mac))
665 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
666 dev->name, mac->speed, mac->duplex ? "full" : "half");
669 static int pasemi_mac_phy_init(struct net_device *dev)
671 struct pasemi_mac *mac = netdev_priv(dev);
672 struct device_node *dn, *phy_dn;
673 struct phy_device *phydev;
676 const unsigned int *prop;
680 dn = pci_device_to_OF_node(mac->pdev);
681 ph = get_property(dn, "phy-handle", NULL);
684 phy_dn = of_find_node_by_phandle(*ph);
686 prop = get_property(phy_dn, "reg", NULL);
687 ret = of_address_to_resource(phy_dn->parent, 0, &r);
692 snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
700 phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
702 if (IS_ERR(phydev)) {
703 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
704 return PTR_ERR(phydev);
707 mac->phydev = phydev;
717 static int pasemi_mac_open(struct net_device *dev)
719 struct pasemi_mac *mac = netdev_priv(dev);
724 /* enable rx section */
725 pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD,
726 PAS_DMA_COM_RXCMD_EN);
728 /* enable tx section */
729 pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD,
730 PAS_DMA_COM_TXCMD_EN);
732 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
733 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
734 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
736 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags);
738 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
739 PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
741 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
743 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
744 PAS_IOB_DMA_RXCH_CFG_CNTTH(1));
746 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
747 PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
749 /* Clear out any residual packet count state from firmware */
750 pasemi_mac_restart_rx_intr(mac);
751 pasemi_mac_restart_tx_intr(mac);
753 /* 0xffffff is max value, about 16ms */
754 pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
755 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
757 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
759 ret = pasemi_mac_setup_rx_resources(dev);
761 goto out_rx_resources;
763 ret = pasemi_mac_setup_tx_resources(dev);
765 goto out_tx_resources;
767 pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL,
768 PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
769 PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
772 pci_write_config_dword(mac->dma_pdev,
773 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
774 PAS_DMA_RXINT_RCMDSTA_EN);
776 /* enable rx channel */
777 pci_write_config_dword(mac->dma_pdev,
778 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
779 PAS_DMA_RXCHAN_CCMDSTA_EN |
780 PAS_DMA_RXCHAN_CCMDSTA_DU);
782 /* enable tx channel */
783 pci_write_config_dword(mac->dma_pdev,
784 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
785 PAS_DMA_TXCHAN_TCMDSTA_EN);
787 pasemi_mac_replenish_rx_ring(dev);
789 ret = pasemi_mac_phy_init(dev);
790 /* Some configs don't have PHYs (XAUI etc), so don't complain about
791 * failed init due to -ENODEV.
793 if (ret && ret != -ENODEV)
794 dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
796 netif_start_queue(dev);
797 netif_poll_enable(dev);
799 /* Interrupts are a bit different for our DMA controller: While
800 * it's got one a regular PCI device header, the interrupt there
801 * is really the base of the range it's using. Each tx and rx
802 * channel has it's own interrupt source.
805 base_irq = virq_to_hw(mac->dma_pdev->irq);
807 mac->tx_irq = irq_create_mapping(NULL, base_irq + mac->dma_txch);
808 mac->rx_irq = irq_create_mapping(NULL, base_irq + 20 + mac->dma_txch);
810 ret = request_irq(mac->tx_irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
811 mac->tx->irq_name, dev);
813 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
814 base_irq + mac->dma_txch, ret);
818 ret = request_irq(mac->rx_irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
819 mac->rx->irq_name, dev);
821 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
822 base_irq + 20 + mac->dma_rxch, ret);
827 phy_start(mac->phydev);
832 free_irq(mac->tx_irq, dev);
834 netif_poll_disable(dev);
835 netif_stop_queue(dev);
836 pasemi_mac_free_tx_resources(dev);
838 pasemi_mac_free_rx_resources(dev);
844 #define MAX_RETRIES 5000
846 static int pasemi_mac_close(struct net_device *dev)
848 struct pasemi_mac *mac = netdev_priv(dev);
853 phy_stop(mac->phydev);
854 phy_disconnect(mac->phydev);
857 netif_stop_queue(dev);
859 /* Clean out any pending buffers */
860 pasemi_mac_clean_tx(mac);
861 pasemi_mac_clean_rx(mac, RX_RING_SIZE);
863 /* Disable interface */
864 pci_write_config_dword(mac->dma_pdev,
865 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
866 PAS_DMA_TXCHAN_TCMDSTA_ST);
867 pci_write_config_dword(mac->dma_pdev,
868 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
869 PAS_DMA_RXINT_RCMDSTA_ST);
870 pci_write_config_dword(mac->dma_pdev,
871 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
872 PAS_DMA_RXCHAN_CCMDSTA_ST);
874 for (retries = 0; retries < MAX_RETRIES; retries++) {
875 pci_read_config_dword(mac->dma_pdev,
876 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
878 if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
883 if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
884 dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
886 for (retries = 0; retries < MAX_RETRIES; retries++) {
887 pci_read_config_dword(mac->dma_pdev,
888 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
890 if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
895 if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
896 dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
898 for (retries = 0; retries < MAX_RETRIES; retries++) {
899 pci_read_config_dword(mac->dma_pdev,
900 PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
902 if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
907 if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
908 dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
910 /* Then, disable the channel. This must be done separately from
911 * stopping, since you can't disable when active.
914 pci_write_config_dword(mac->dma_pdev,
915 PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
916 pci_write_config_dword(mac->dma_pdev,
917 PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
918 pci_write_config_dword(mac->dma_pdev,
919 PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
921 free_irq(mac->tx_irq, dev);
922 free_irq(mac->rx_irq, dev);
925 pasemi_mac_free_rx_resources(dev);
926 pasemi_mac_free_tx_resources(dev);
931 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
933 struct pasemi_mac *mac = netdev_priv(dev);
934 struct pasemi_mac_txring *txring;
935 struct pasemi_mac_buffer *info;
936 struct pas_dma_xct_descr *dp;
941 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
943 if (skb->ip_summed == CHECKSUM_PARTIAL) {
944 const unsigned char *nh = skb_network_header(skb);
946 switch (ip_hdr(skb)->protocol) {
948 dflags |= XCT_MACTX_CSUM_TCP;
949 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
950 dflags |= XCT_MACTX_IPO(nh - skb->data);
953 dflags |= XCT_MACTX_CSUM_UDP;
954 dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
955 dflags |= XCT_MACTX_IPO(nh - skb->data);
960 map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
962 if (dma_mapping_error(map))
963 return NETDEV_TX_BUSY;
967 spin_lock_irqsave(&txring->lock, flags);
969 if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
970 spin_unlock_irqrestore(&txring->lock, flags);
971 pasemi_mac_clean_tx(mac);
972 spin_lock_irqsave(&txring->lock, flags);
974 if (txring->next_to_clean - txring->next_to_use ==
976 /* Still no room -- stop the queue and wait for tx
977 * intr when there's room.
979 netif_stop_queue(dev);
985 dp = &TX_DESC(mac, txring->next_to_use);
986 info = &TX_DESC_INFO(mac, txring->next_to_use);
988 dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
989 dp->ptr = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
993 txring->next_to_use++;
994 mac->stats.tx_packets++;
995 mac->stats.tx_bytes += skb->len;
997 spin_unlock_irqrestore(&txring->lock, flags);
999 pci_write_config_dword(mac->dma_pdev,
1000 PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
1002 return NETDEV_TX_OK;
1005 spin_unlock_irqrestore(&txring->lock, flags);
1006 pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
1007 return NETDEV_TX_BUSY;
1010 static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
1012 struct pasemi_mac *mac = netdev_priv(dev);
1018 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1020 struct pasemi_mac *mac = netdev_priv(dev);
1023 pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
1025 /* Set promiscuous */
1026 if (dev->flags & IFF_PROMISC)
1027 flags |= PAS_MAC_CFG_PCFG_PR;
1029 flags &= ~PAS_MAC_CFG_PCFG_PR;
1031 pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
1035 static int pasemi_mac_poll(struct net_device *dev, int *budget)
1037 int pkts, limit = min(*budget, dev->quota);
1038 struct pasemi_mac *mac = netdev_priv(dev);
1040 pkts = pasemi_mac_clean_rx(mac, limit);
1046 /* all done, no more packets present */
1047 netif_rx_complete(dev);
1049 pasemi_mac_restart_rx_intr(mac);
1052 /* used up our quantum, so reschedule */
1057 static int __devinit
1058 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1060 static int index = 0;
1061 struct net_device *dev;
1062 struct pasemi_mac *mac;
1065 err = pci_enable_device(pdev);
1069 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1072 "pasemi_mac: Could not allocate ethernet device.\n");
1074 goto out_disable_device;
1077 SET_MODULE_OWNER(dev);
1078 pci_set_drvdata(pdev, dev);
1079 SET_NETDEV_DEV(dev, &pdev->dev);
1081 mac = netdev_priv(dev);
1085 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1087 if (!mac->dma_pdev) {
1088 dev_err(&pdev->dev, "Can't find DMA Controller\n");
1090 goto out_free_netdev;
1093 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1095 if (!mac->iob_pdev) {
1096 dev_err(&pdev->dev, "Can't find I/O Bridge\n");
1098 goto out_put_dma_pdev;
1101 /* These should come out of the device tree eventually */
1102 mac->dma_txch = index;
1103 mac->dma_rxch = index;
1105 /* We probe GMAC before XAUI, but the DMA interfaces are
1106 * in XAUI, GMAC order.
1109 mac->dma_if = index + 2;
1111 mac->dma_if = index - 4;
1114 switch (pdev->device) {
1116 mac->type = MAC_TYPE_GMAC;
1119 mac->type = MAC_TYPE_XAUI;
1126 /* get mac addr from device tree */
1127 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1131 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1133 dev->open = pasemi_mac_open;
1134 dev->stop = pasemi_mac_close;
1135 dev->hard_start_xmit = pasemi_mac_start_tx;
1136 dev->get_stats = pasemi_mac_get_stats;
1137 dev->set_multicast_list = pasemi_mac_set_rx_mode;
1139 dev->poll = pasemi_mac_poll;
1140 dev->features = NETIF_F_HW_CSUM;
1142 /* The dma status structure is located in the I/O bridge, and
1143 * is cache coherent.
1146 /* XXXOJN This should come from the device tree */
1147 dma_status = __ioremap(0xfd800000, 0x1000, 0);
1149 mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
1150 mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
1152 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1154 /* Enable most messages by default */
1155 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1157 err = register_netdev(dev);
1160 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1164 printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
1165 "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
1166 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1167 mac->dma_if, mac->dma_txch, mac->dma_rxch,
1168 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1169 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1174 pci_dev_put(mac->iob_pdev);
1176 pci_dev_put(mac->dma_pdev);
1180 pci_disable_device(pdev);
1185 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1187 struct net_device *netdev = pci_get_drvdata(pdev);
1188 struct pasemi_mac *mac;
1193 mac = netdev_priv(netdev);
1195 unregister_netdev(netdev);
1197 pci_disable_device(pdev);
1198 pci_dev_put(mac->dma_pdev);
1199 pci_dev_put(mac->iob_pdev);
1201 pci_set_drvdata(pdev, NULL);
1202 free_netdev(netdev);
1205 static struct pci_device_id pasemi_mac_pci_tbl[] = {
1206 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1207 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1210 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1212 static struct pci_driver pasemi_mac_driver = {
1213 .name = "pasemi_mac",
1214 .id_table = pasemi_mac_pci_tbl,
1215 .probe = pasemi_mac_probe,
1216 .remove = __devexit_p(pasemi_mac_remove),
1219 static void __exit pasemi_mac_cleanup_module(void)
1221 pci_unregister_driver(&pasemi_mac_driver);
1222 __iounmap(dma_status);
1226 int pasemi_mac_init_module(void)
1228 return pci_register_driver(&pasemi_mac_driver);
1231 module_init(pasemi_mac_init_module);
1232 module_exit(pasemi_mac_cleanup_module);