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/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/dmaengine.h>
26 #include <linux/delay.h>
27 #include <linux/netdevice.h>
28 #include <linux/of_mdio.h>
29 #include <linux/etherdevice.h>
30 #include <asm/dma-mapping.h>
32 #include <linux/skbuff.h>
35 #include <linux/tcp.h>
36 #include <net/checksum.h>
37 #include <linux/inet_lro.h>
40 #include <asm/firmware.h>
41 #include <asm/pasemi_dma.h>
43 #include "pasemi_mac.h"
45 /* We have our own align, since ppc64 in general has it at 0 because
46 * of design flaws in some of the server bridge chips. However, for
47 * PWRficient doing the unaligned copies is more expensive than doing
48 * unaligned DMA, so make sure the data is aligned instead.
50 #define LOCAL_SKB_ALIGN 2
60 #define LRO_MAX_AGGR 64
63 #define PE_MAX_MTU 9000
64 #define PE_DEF_MTU ETH_DATA_LEN
66 #define DEFAULT_MSG_ENABLE \
76 MODULE_LICENSE("GPL");
77 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
78 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
80 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
81 module_param(debug, int, 0);
82 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
84 extern const struct ethtool_ops pasemi_mac_ethtool_ops;
86 static int translation_enabled(void)
88 #if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE)
91 return firmware_has_feature(FW_FEATURE_LPAR);
95 static void write_iob_reg(unsigned int reg, unsigned int val)
97 pasemi_write_iob_reg(reg, val);
100 static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg)
102 return pasemi_read_mac_reg(mac->dma_if, reg);
105 static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg,
108 pasemi_write_mac_reg(mac->dma_if, reg, val);
111 static unsigned int read_dma_reg(unsigned int reg)
113 return pasemi_read_dma_reg(reg);
116 static void write_dma_reg(unsigned int reg, unsigned int val)
118 pasemi_write_dma_reg(reg, val);
121 static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac)
126 static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac)
131 static inline void prefetch_skb(const struct sk_buff *skb)
141 static int mac_to_intf(struct pasemi_mac *mac)
143 struct pci_dev *pdev = mac->pdev;
145 int nintf, off, i, j;
146 int devfn = pdev->devfn;
148 tmp = read_dma_reg(PAS_DMA_CAP_IFI);
149 nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S;
150 off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S;
152 /* IOFF contains the offset to the registers containing the
153 * DMA interface-to-MAC-pci-id mappings, and NIN contains number
154 * of total interfaces. Each register contains 4 devfns.
155 * Just do a linear search until we find the devfn of the MAC
156 * we're trying to look up.
159 for (i = 0; i < (nintf+3)/4; i++) {
160 tmp = read_dma_reg(off+4*i);
161 for (j = 0; j < 4; j++) {
162 if (((tmp >> (8*j)) & 0xff) == devfn)
169 static void pasemi_mac_intf_disable(struct pasemi_mac *mac)
173 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
174 flags &= ~PAS_MAC_CFG_PCFG_PE;
175 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
178 static void pasemi_mac_intf_enable(struct pasemi_mac *mac)
182 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
183 flags |= PAS_MAC_CFG_PCFG_PE;
184 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
187 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
189 struct pci_dev *pdev = mac->pdev;
190 struct device_node *dn = pci_device_to_OF_node(pdev);
197 "No device node for mac, not configuring\n");
201 maddr = of_get_property(dn, "local-mac-address", &len);
203 if (maddr && len == 6) {
204 memcpy(mac->mac_addr, maddr, 6);
208 /* Some old versions of firmware mistakenly uses mac-address
209 * (and as a string) instead of a byte array in local-mac-address.
213 maddr = of_get_property(dn, "mac-address", NULL);
217 "no mac address in device tree, not configuring\n");
221 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
222 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
224 "can't parse mac address, not configuring\n");
228 memcpy(mac->mac_addr, addr, 6);
233 static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p)
235 struct pasemi_mac *mac = netdev_priv(dev);
236 struct sockaddr *addr = p;
237 unsigned int adr0, adr1;
239 if (!is_valid_ether_addr(addr->sa_data))
242 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
244 adr0 = dev->dev_addr[2] << 24 |
245 dev->dev_addr[3] << 16 |
246 dev->dev_addr[4] << 8 |
248 adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1);
250 adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1];
252 pasemi_mac_intf_disable(mac);
253 write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0);
254 write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1);
255 pasemi_mac_intf_enable(mac);
260 static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
261 void **tcph, u64 *hdr_flags, void *data)
263 u64 macrx = (u64) data;
267 /* IPv4 header checksum failed */
268 if ((macrx & XCT_MACRX_HTY_M) != XCT_MACRX_HTY_IPV4_OK)
272 skb_reset_network_header(skb);
274 if (iph->protocol != IPPROTO_TCP)
277 ip_len = ip_hdrlen(skb);
278 skb_set_transport_header(skb, ip_len);
279 *tcph = tcp_hdr(skb);
281 /* check if ip header and tcp header are complete */
282 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
285 *hdr_flags = LRO_IPV4 | LRO_TCP;
291 static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac,
294 const dma_addr_t *dmas)
297 struct pci_dev *pdev = mac->dma_pdev;
299 pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE);
301 for (f = 0; f < nfrags; f++) {
302 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
304 pci_unmap_page(pdev, dmas[f+1], frag->size, PCI_DMA_TODEVICE);
306 dev_kfree_skb_irq(skb);
308 /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs,
309 * aligned up to a power of 2
311 return (nfrags + 3) & ~1;
314 static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac)
316 struct pasemi_mac_csring *ring;
321 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring),
322 offsetof(struct pasemi_mac_csring, chan));
325 dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n");
329 chno = ring->chan.chno;
331 ring->size = CS_RING_SIZE;
332 ring->next_to_fill = 0;
334 /* Allocate descriptors */
335 if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE))
338 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
339 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
340 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
341 val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3);
343 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
345 ring->events[0] = pasemi_dma_alloc_flag();
346 ring->events[1] = pasemi_dma_alloc_flag();
347 if (ring->events[0] < 0 || ring->events[1] < 0)
350 pasemi_dma_clear_flag(ring->events[0]);
351 pasemi_dma_clear_flag(ring->events[1]);
353 ring->fun = pasemi_dma_alloc_fun();
357 cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP |
358 PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) |
359 PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ;
361 if (translation_enabled())
362 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
364 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
367 pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
368 PAS_DMA_TXCHAN_TCMDSTA_DB |
369 PAS_DMA_TXCHAN_TCMDSTA_DE |
370 PAS_DMA_TXCHAN_TCMDSTA_DA);
376 if (ring->events[0] >= 0)
377 pasemi_dma_free_flag(ring->events[0]);
378 if (ring->events[1] >= 0)
379 pasemi_dma_free_flag(ring->events[1]);
380 pasemi_dma_free_ring(&ring->chan);
382 pasemi_dma_free_chan(&ring->chan);
388 static void pasemi_mac_setup_csrings(struct pasemi_mac *mac)
391 mac->cs[0] = pasemi_mac_setup_csring(mac);
392 if (mac->type == MAC_TYPE_XAUI)
393 mac->cs[1] = pasemi_mac_setup_csring(mac);
397 for (i = 0; i < MAX_CS; i++)
402 static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring)
404 pasemi_dma_stop_chan(&csring->chan);
405 pasemi_dma_free_flag(csring->events[0]);
406 pasemi_dma_free_flag(csring->events[1]);
407 pasemi_dma_free_ring(&csring->chan);
408 pasemi_dma_free_chan(&csring->chan);
409 pasemi_dma_free_fun(csring->fun);
412 static int pasemi_mac_setup_rx_resources(const struct net_device *dev)
414 struct pasemi_mac_rxring *ring;
415 struct pasemi_mac *mac = netdev_priv(dev);
419 ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring),
420 offsetof(struct pasemi_mac_rxring, chan));
423 dev_err(&mac->pdev->dev, "Can't allocate RX channel\n");
426 chno = ring->chan.chno;
428 spin_lock_init(&ring->lock);
430 ring->size = RX_RING_SIZE;
431 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
432 RX_RING_SIZE, GFP_KERNEL);
434 if (!ring->ring_info)
437 /* Allocate descriptors */
438 if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE))
441 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
442 RX_RING_SIZE * sizeof(u64),
443 &ring->buf_dma, GFP_KERNEL);
447 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
449 write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno),
450 PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma));
452 write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno),
453 PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) |
454 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
456 cfg = PAS_DMA_RXCHAN_CFG_HBU(2);
458 if (translation_enabled())
459 cfg |= PAS_DMA_RXCHAN_CFG_CTR;
461 write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg);
463 write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if),
464 PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma));
466 write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if),
467 PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) |
468 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
470 cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 |
471 PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
472 PAS_DMA_RXINT_CFG_HEN;
474 if (translation_enabled())
475 cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR;
477 write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg);
479 ring->next_to_fill = 0;
480 ring->next_to_clean = 0;
487 kfree(ring->ring_info);
489 pasemi_dma_free_chan(&ring->chan);
494 static struct pasemi_mac_txring *
495 pasemi_mac_setup_tx_resources(const struct net_device *dev)
497 struct pasemi_mac *mac = netdev_priv(dev);
499 struct pasemi_mac_txring *ring;
503 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring),
504 offsetof(struct pasemi_mac_txring, chan));
507 dev_err(&mac->pdev->dev, "Can't allocate TX channel\n");
511 chno = ring->chan.chno;
513 spin_lock_init(&ring->lock);
515 ring->size = TX_RING_SIZE;
516 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
517 TX_RING_SIZE, GFP_KERNEL);
518 if (!ring->ring_info)
521 /* Allocate descriptors */
522 if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE))
525 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
526 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
527 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
528 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
530 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
532 cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE |
533 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
534 PAS_DMA_TXCHAN_CFG_UP |
535 PAS_DMA_TXCHAN_CFG_WT(4);
537 if (translation_enabled())
538 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
540 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
542 ring->next_to_fill = 0;
543 ring->next_to_clean = 0;
549 kfree(ring->ring_info);
551 pasemi_dma_free_chan(&ring->chan);
556 static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac)
558 struct pasemi_mac_txring *txring = tx_ring(mac);
560 struct pasemi_mac_buffer *info;
561 dma_addr_t dmas[MAX_SKB_FRAGS+1];
565 start = txring->next_to_clean;
566 limit = txring->next_to_fill;
568 /* Compensate for when fill has wrapped and clean has not */
570 limit += TX_RING_SIZE;
572 for (i = start; i < limit; i += freed) {
573 info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)];
574 if (info->dma && info->skb) {
575 nfrags = skb_shinfo(info->skb)->nr_frags;
576 for (j = 0; j <= nfrags; j++)
577 dmas[j] = txring->ring_info[(i+1+j) &
578 (TX_RING_SIZE-1)].dma;
579 freed = pasemi_mac_unmap_tx_skb(mac, nfrags,
585 kfree(txring->ring_info);
586 pasemi_dma_free_chan(&txring->chan);
590 static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac)
592 struct pasemi_mac_rxring *rx = rx_ring(mac);
594 struct pasemi_mac_buffer *info;
596 for (i = 0; i < RX_RING_SIZE; i++) {
597 info = &RX_DESC_INFO(rx, i);
598 if (info->skb && info->dma) {
599 pci_unmap_single(mac->dma_pdev,
603 dev_kfree_skb_any(info->skb);
609 for (i = 0; i < RX_RING_SIZE; i++)
613 static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac)
615 pasemi_mac_free_rx_buffers(mac);
617 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
618 rx_ring(mac)->buffers, rx_ring(mac)->buf_dma);
620 kfree(rx_ring(mac)->ring_info);
621 pasemi_dma_free_chan(&rx_ring(mac)->chan);
625 static void pasemi_mac_replenish_rx_ring(const struct net_device *dev,
628 const struct pasemi_mac *mac = netdev_priv(dev);
629 struct pasemi_mac_rxring *rx = rx_ring(mac);
635 fill = rx_ring(mac)->next_to_fill;
636 for (count = 0; count < limit; count++) {
637 struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill);
638 u64 *buff = &RX_BUFF(rx, fill);
645 skb = dev_alloc_skb(mac->bufsz);
646 skb_reserve(skb, LOCAL_SKB_ALIGN);
651 dma = pci_map_single(mac->dma_pdev, skb->data,
652 mac->bufsz - LOCAL_SKB_ALIGN,
655 if (unlikely(pci_dma_mapping_error(mac->dma_pdev, dma))) {
656 dev_kfree_skb_irq(info->skb);
662 *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma);
668 write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count);
670 rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) &
674 static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac)
676 struct pasemi_mac_rxring *rx = rx_ring(mac);
677 unsigned int reg, pcnt;
678 /* Re-enable packet count interrupts: finally
679 * ack the packet count interrupt we got in rx_intr.
682 pcnt = *rx->chan.status & PAS_STATUS_PCNT_M;
684 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
686 if (*rx->chan.status & PAS_STATUS_TIMER)
687 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
689 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg);
692 static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac)
694 unsigned int reg, pcnt;
696 /* Re-enable packet count interrupts */
697 pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M;
699 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
701 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg);
705 static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac,
708 unsigned int rcmdsta, ccmdsta;
709 struct pasemi_dmachan *chan = &rx_ring(mac)->chan;
711 if (!netif_msg_rx_err(mac))
714 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
715 ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno));
717 printk(KERN_ERR "pasemi_mac: rx error. macrx %016llx, rx status %llx\n",
718 macrx, *chan->status);
720 printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
724 static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac,
728 struct pasemi_dmachan *chan = &tx_ring(mac)->chan;
730 if (!netif_msg_tx_err(mac))
733 cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno));
735 printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016llx, "\
736 "tx status 0x%016llx\n", mactx, *chan->status);
738 printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
741 static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx,
744 const struct pasemi_dmachan *chan = &rx->chan;
745 struct pasemi_mac *mac = rx->mac;
746 struct pci_dev *pdev = mac->dma_pdev;
748 int count, buf_index, tot_bytes, packets;
749 struct pasemi_mac_buffer *info;
758 spin_lock(&rx->lock);
760 n = rx->next_to_clean;
762 prefetch(&RX_DESC(rx, n));
764 for (count = 0; count < limit; count++) {
765 macrx = RX_DESC(rx, n);
766 prefetch(&RX_DESC(rx, n+4));
768 if ((macrx & XCT_MACRX_E) ||
769 (*chan->status & PAS_STATUS_ERROR))
770 pasemi_mac_rx_error(mac, macrx);
772 if (!(macrx & XCT_MACRX_O))
777 BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
779 eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >>
783 dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M);
784 info = &RX_DESC_INFO(rx, buf_index);
790 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
792 pci_unmap_single(pdev, dma, mac->bufsz - LOCAL_SKB_ALIGN,
795 if (macrx & XCT_MACRX_CRC) {
796 /* CRC error flagged */
797 mac->netdev->stats.rx_errors++;
798 mac->netdev->stats.rx_crc_errors++;
799 /* No need to free skb, it'll be reused */
806 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
807 skb->ip_summed = CHECKSUM_UNNECESSARY;
808 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
811 skb_checksum_none_assert(skb);
816 /* Don't include CRC */
819 skb->protocol = eth_type_trans(skb, mac->netdev);
820 lro_receive_skb(&mac->lro_mgr, skb, (void *)macrx);
824 RX_DESC(rx, n+1) = 0;
826 /* Need to zero it out since hardware doesn't, since the
827 * replenish loop uses it to tell when it's done.
829 RX_BUFF(rx, buf_index) = 0;
834 if (n > RX_RING_SIZE) {
835 /* Errata 5971 workaround: L2 target of headers */
836 write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0);
837 n &= (RX_RING_SIZE-1);
840 rx_ring(mac)->next_to_clean = n;
842 lro_flush_all(&mac->lro_mgr);
844 /* Increase is in number of 16-byte entries, and since each descriptor
845 * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
848 write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1);
850 pasemi_mac_replenish_rx_ring(mac->netdev, count);
852 mac->netdev->stats.rx_bytes += tot_bytes;
853 mac->netdev->stats.rx_packets += packets;
855 spin_unlock(&rx_ring(mac)->lock);
860 /* Can't make this too large or we blow the kernel stack limits */
861 #define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS)
863 static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring)
865 struct pasemi_dmachan *chan = &txring->chan;
866 struct pasemi_mac *mac = txring->mac;
868 unsigned int start, descr_count, buf_count, batch_limit;
869 unsigned int ring_limit;
870 unsigned int total_count;
872 struct sk_buff *skbs[TX_CLEAN_BATCHSIZE];
873 dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1];
874 int nf[TX_CLEAN_BATCHSIZE];
878 batch_limit = TX_CLEAN_BATCHSIZE;
880 spin_lock_irqsave(&txring->lock, flags);
882 start = txring->next_to_clean;
883 ring_limit = txring->next_to_fill;
885 prefetch(&TX_DESC_INFO(txring, start+1).skb);
887 /* Compensate for when fill has wrapped but clean has not */
888 if (start > ring_limit)
889 ring_limit += TX_RING_SIZE;
895 descr_count < batch_limit && i < ring_limit;
897 u64 mactx = TX_DESC(txring, i);
900 if ((mactx & XCT_MACTX_E) ||
901 (*chan->status & PAS_STATUS_ERROR))
902 pasemi_mac_tx_error(mac, mactx);
904 /* Skip over control descriptors */
905 if (!(mactx & XCT_MACTX_LLEN_M)) {
906 TX_DESC(txring, i) = 0;
907 TX_DESC(txring, i+1) = 0;
912 skb = TX_DESC_INFO(txring, i+1).skb;
913 nr_frags = TX_DESC_INFO(txring, i).dma;
915 if (unlikely(mactx & XCT_MACTX_O))
916 /* Not yet transmitted */
919 buf_count = 2 + nr_frags;
920 /* Since we always fill with an even number of entries, make
921 * sure we skip any unused one at the end as well.
926 for (j = 0; j <= nr_frags; j++)
927 dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma;
929 skbs[descr_count] = skb;
930 nf[descr_count] = nr_frags;
932 TX_DESC(txring, i) = 0;
933 TX_DESC(txring, i+1) = 0;
937 txring->next_to_clean = i & (TX_RING_SIZE-1);
939 spin_unlock_irqrestore(&txring->lock, flags);
940 netif_wake_queue(mac->netdev);
942 for (i = 0; i < descr_count; i++)
943 pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]);
945 total_count += descr_count;
947 /* If the batch was full, try to clean more */
948 if (descr_count == batch_limit)
955 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
957 const struct pasemi_mac_rxring *rxring = data;
958 struct pasemi_mac *mac = rxring->mac;
959 const struct pasemi_dmachan *chan = &rxring->chan;
962 if (!(*chan->status & PAS_STATUS_CAUSE_M))
965 /* Don't reset packet count so it won't fire again but clear
970 if (*chan->status & PAS_STATUS_SOFT)
971 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
972 if (*chan->status & PAS_STATUS_ERROR)
973 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
975 napi_schedule(&mac->napi);
977 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg);
982 #define TX_CLEAN_INTERVAL HZ
984 static void pasemi_mac_tx_timer(unsigned long data)
986 struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data;
987 struct pasemi_mac *mac = txring->mac;
989 pasemi_mac_clean_tx(txring);
991 mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL);
993 pasemi_mac_restart_tx_intr(mac);
996 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
998 struct pasemi_mac_txring *txring = data;
999 const struct pasemi_dmachan *chan = &txring->chan;
1000 struct pasemi_mac *mac = txring->mac;
1003 if (!(*chan->status & PAS_STATUS_CAUSE_M))
1008 if (*chan->status & PAS_STATUS_SOFT)
1009 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
1010 if (*chan->status & PAS_STATUS_ERROR)
1011 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
1013 mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2);
1015 napi_schedule(&mac->napi);
1018 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
1023 static void pasemi_adjust_link(struct net_device *dev)
1025 struct pasemi_mac *mac = netdev_priv(dev);
1028 unsigned int new_flags;
1030 if (!mac->phydev->link) {
1031 /* If no link, MAC speed settings don't matter. Just report
1032 * link down and return.
1034 if (mac->link && netif_msg_link(mac))
1035 printk(KERN_INFO "%s: Link is down.\n", dev->name);
1037 netif_carrier_off(dev);
1038 pasemi_mac_intf_disable(mac);
1043 pasemi_mac_intf_enable(mac);
1044 netif_carrier_on(dev);
1047 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1048 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
1049 PAS_MAC_CFG_PCFG_TSR_M);
1051 if (!mac->phydev->duplex)
1052 new_flags |= PAS_MAC_CFG_PCFG_HD;
1054 switch (mac->phydev->speed) {
1056 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
1057 PAS_MAC_CFG_PCFG_TSR_1G;
1060 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
1061 PAS_MAC_CFG_PCFG_TSR_100M;
1064 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
1065 PAS_MAC_CFG_PCFG_TSR_10M;
1068 printk("Unsupported speed %d\n", mac->phydev->speed);
1071 /* Print on link or speed/duplex change */
1072 msg = mac->link != mac->phydev->link || flags != new_flags;
1074 mac->duplex = mac->phydev->duplex;
1075 mac->speed = mac->phydev->speed;
1076 mac->link = mac->phydev->link;
1078 if (new_flags != flags)
1079 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
1081 if (msg && netif_msg_link(mac))
1082 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
1083 dev->name, mac->speed, mac->duplex ? "full" : "half");
1086 static int pasemi_mac_phy_init(struct net_device *dev)
1088 struct pasemi_mac *mac = netdev_priv(dev);
1089 struct device_node *dn, *phy_dn;
1090 struct phy_device *phydev;
1092 dn = pci_device_to_OF_node(mac->pdev);
1093 phy_dn = of_parse_phandle(dn, "phy-handle", 0);
1094 of_node_put(phy_dn);
1100 phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0,
1101 PHY_INTERFACE_MODE_SGMII);
1103 if (IS_ERR(phydev)) {
1104 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
1105 return PTR_ERR(phydev);
1108 mac->phydev = phydev;
1114 static int pasemi_mac_open(struct net_device *dev)
1116 struct pasemi_mac *mac = netdev_priv(dev);
1120 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
1121 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
1122 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
1124 write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
1126 ret = pasemi_mac_setup_rx_resources(dev);
1128 goto out_rx_resources;
1130 mac->tx = pasemi_mac_setup_tx_resources(dev);
1135 /* We might already have allocated rings in case mtu was changed
1136 * before interface was brought up.
1138 if (dev->mtu > 1500 && !mac->num_cs) {
1139 pasemi_mac_setup_csrings(mac);
1144 /* Zero out rmon counters */
1145 for (i = 0; i < 32; i++)
1146 write_mac_reg(mac, PAS_MAC_RMON(i), 0);
1148 /* 0x3ff with 33MHz clock is about 31us */
1149 write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG,
1150 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff));
1152 write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno),
1153 PAS_IOB_DMA_RXCH_CFG_CNTTH(256));
1155 write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
1156 PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
1158 write_mac_reg(mac, PAS_MAC_IPC_CHNL,
1159 PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) |
1160 PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno));
1163 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1164 PAS_DMA_RXINT_RCMDSTA_EN |
1165 PAS_DMA_RXINT_RCMDSTA_DROPS_M |
1166 PAS_DMA_RXINT_RCMDSTA_BP |
1167 PAS_DMA_RXINT_RCMDSTA_OO |
1168 PAS_DMA_RXINT_RCMDSTA_BT);
1170 /* enable rx channel */
1171 pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU |
1172 PAS_DMA_RXCHAN_CCMDSTA_OD |
1173 PAS_DMA_RXCHAN_CCMDSTA_FD |
1174 PAS_DMA_RXCHAN_CCMDSTA_DT);
1176 /* enable tx channel */
1177 pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
1178 PAS_DMA_TXCHAN_TCMDSTA_DB |
1179 PAS_DMA_TXCHAN_TCMDSTA_DE |
1180 PAS_DMA_TXCHAN_TCMDSTA_DA);
1182 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
1184 write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno),
1187 /* Clear out any residual packet count state from firmware */
1188 pasemi_mac_restart_rx_intr(mac);
1189 pasemi_mac_restart_tx_intr(mac);
1191 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
1193 if (mac->type == MAC_TYPE_GMAC)
1194 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
1196 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
1198 /* Enable interface in MAC */
1199 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1201 ret = pasemi_mac_phy_init(dev);
1203 /* Since we won't get link notification, just enable RX */
1204 pasemi_mac_intf_enable(mac);
1205 if (mac->type == MAC_TYPE_GMAC) {
1206 /* Warn for missing PHY on SGMII (1Gig) ports */
1207 dev_warn(&mac->pdev->dev,
1208 "PHY init failed: %d.\n", ret);
1209 dev_warn(&mac->pdev->dev,
1210 "Defaulting to 1Gbit full duplex\n");
1214 netif_start_queue(dev);
1215 napi_enable(&mac->napi);
1217 snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx",
1220 ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, IRQF_DISABLED,
1221 mac->tx_irq_name, mac->tx);
1223 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1224 mac->tx->chan.irq, ret);
1228 snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx",
1231 ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, IRQF_DISABLED,
1232 mac->rx_irq_name, mac->rx);
1234 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1235 mac->rx->chan.irq, ret);
1240 phy_start(mac->phydev);
1242 init_timer(&mac->tx->clean_timer);
1243 mac->tx->clean_timer.function = pasemi_mac_tx_timer;
1244 mac->tx->clean_timer.data = (unsigned long)mac->tx;
1245 mac->tx->clean_timer.expires = jiffies+HZ;
1246 add_timer(&mac->tx->clean_timer);
1251 free_irq(mac->tx->chan.irq, mac->tx);
1253 napi_disable(&mac->napi);
1254 netif_stop_queue(dev);
1257 pasemi_mac_free_tx_resources(mac);
1258 pasemi_mac_free_rx_resources(mac);
1264 #define MAX_RETRIES 5000
1266 static void pasemi_mac_pause_txchan(struct pasemi_mac *mac)
1268 unsigned int sta, retries;
1269 int txch = tx_ring(mac)->chan.chno;
1271 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch),
1272 PAS_DMA_TXCHAN_TCMDSTA_ST);
1274 for (retries = 0; retries < MAX_RETRIES; retries++) {
1275 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1276 if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT))
1281 if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)
1282 dev_err(&mac->dma_pdev->dev,
1283 "Failed to stop tx channel, tcmdsta %08x\n", sta);
1285 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0);
1288 static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac)
1290 unsigned int sta, retries;
1291 int rxch = rx_ring(mac)->chan.chno;
1293 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch),
1294 PAS_DMA_RXCHAN_CCMDSTA_ST);
1295 for (retries = 0; retries < MAX_RETRIES; retries++) {
1296 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1297 if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT))
1302 if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)
1303 dev_err(&mac->dma_pdev->dev,
1304 "Failed to stop rx channel, ccmdsta 08%x\n", sta);
1305 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0);
1308 static void pasemi_mac_pause_rxint(struct pasemi_mac *mac)
1310 unsigned int sta, retries;
1312 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1313 PAS_DMA_RXINT_RCMDSTA_ST);
1314 for (retries = 0; retries < MAX_RETRIES; retries++) {
1315 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1316 if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT))
1321 if (sta & PAS_DMA_RXINT_RCMDSTA_ACT)
1322 dev_err(&mac->dma_pdev->dev,
1323 "Failed to stop rx interface, rcmdsta %08x\n", sta);
1324 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
1327 static int pasemi_mac_close(struct net_device *dev)
1329 struct pasemi_mac *mac = netdev_priv(dev);
1333 rxch = rx_ring(mac)->chan.chno;
1334 txch = tx_ring(mac)->chan.chno;
1337 phy_stop(mac->phydev);
1338 phy_disconnect(mac->phydev);
1341 del_timer_sync(&mac->tx->clean_timer);
1343 netif_stop_queue(dev);
1344 napi_disable(&mac->napi);
1346 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1347 if (sta & (PAS_DMA_RXINT_RCMDSTA_BP |
1348 PAS_DMA_RXINT_RCMDSTA_OO |
1349 PAS_DMA_RXINT_RCMDSTA_BT))
1350 printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta);
1352 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1353 if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU |
1354 PAS_DMA_RXCHAN_CCMDSTA_OD |
1355 PAS_DMA_RXCHAN_CCMDSTA_FD |
1356 PAS_DMA_RXCHAN_CCMDSTA_DT))
1357 printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta);
1359 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1360 if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB |
1361 PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA))
1362 printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta);
1364 /* Clean out any pending buffers */
1365 pasemi_mac_clean_tx(tx_ring(mac));
1366 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1368 pasemi_mac_pause_txchan(mac);
1369 pasemi_mac_pause_rxint(mac);
1370 pasemi_mac_pause_rxchan(mac);
1371 pasemi_mac_intf_disable(mac);
1373 free_irq(mac->tx->chan.irq, mac->tx);
1374 free_irq(mac->rx->chan.irq, mac->rx);
1376 for (i = 0; i < mac->num_cs; i++) {
1377 pasemi_mac_free_csring(mac->cs[i]);
1383 /* Free resources */
1384 pasemi_mac_free_rx_resources(mac);
1385 pasemi_mac_free_tx_resources(mac);
1390 static void pasemi_mac_queue_csdesc(const struct sk_buff *skb,
1391 const dma_addr_t *map,
1392 const unsigned int *map_size,
1393 struct pasemi_mac_txring *txring,
1394 struct pasemi_mac_csring *csring)
1398 const int nh_off = skb_network_offset(skb);
1399 const int nh_len = skb_network_header_len(skb);
1400 const int nfrags = skb_shinfo(skb)->nr_frags;
1401 int cs_size, i, fill, hdr, cpyhdr, evt;
1404 fund = XCT_FUN_ST | XCT_FUN_RR_8BRES |
1405 XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1406 XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) |
1407 XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE;
1409 switch (ip_hdr(skb)->protocol) {
1411 fund |= XCT_FUN_SIG_TCP4;
1412 /* TCP checksum is 16 bytes into the header */
1413 cs_dest = map[0] + skb_transport_offset(skb) + 16;
1416 fund |= XCT_FUN_SIG_UDP4;
1417 /* UDP checksum is 6 bytes into the header */
1418 cs_dest = map[0] + skb_transport_offset(skb) + 6;
1424 /* Do the checksum offloaded */
1425 fill = csring->next_to_fill;
1428 CS_DESC(csring, fill++) = fund;
1429 /* Room for 8BRES. Checksum result is really 2 bytes into it */
1430 csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2;
1431 CS_DESC(csring, fill++) = 0;
1433 CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off);
1434 for (i = 1; i <= nfrags; i++)
1435 CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1441 /* Copy the result into the TCP packet */
1443 CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1444 XCT_FUN_LLEN(2) | XCT_FUN_SE;
1445 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T;
1446 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma);
1449 evt = !csring->last_event;
1450 csring->last_event = evt;
1452 /* Event handshaking with MAC TX */
1453 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1454 CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]);
1455 CS_DESC(csring, fill++) = 0;
1456 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1457 CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]);
1458 CS_DESC(csring, fill++) = 0;
1459 csring->next_to_fill = fill & (CS_RING_SIZE-1);
1461 cs_size = fill - hdr;
1462 write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1);
1464 /* TX-side event handshaking */
1465 fill = txring->next_to_fill;
1466 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1467 CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]);
1468 TX_DESC(txring, fill++) = 0;
1469 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1470 CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]);
1471 TX_DESC(txring, fill++) = 0;
1472 txring->next_to_fill = fill;
1474 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2);
1477 static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1479 struct pasemi_mac * const mac = netdev_priv(dev);
1480 struct pasemi_mac_txring * const txring = tx_ring(mac);
1481 struct pasemi_mac_csring *csring;
1484 dma_addr_t map[MAX_SKB_FRAGS+1];
1485 unsigned int map_size[MAX_SKB_FRAGS+1];
1486 unsigned long flags;
1489 const int nh_off = skb_network_offset(skb);
1490 const int nh_len = skb_network_header_len(skb);
1492 prefetch(&txring->ring_info);
1494 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD;
1496 nfrags = skb_shinfo(skb)->nr_frags;
1498 map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb),
1500 map_size[0] = skb_headlen(skb);
1501 if (pci_dma_mapping_error(mac->dma_pdev, map[0]))
1502 goto out_err_nolock;
1504 for (i = 0; i < nfrags; i++) {
1505 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1507 map[i+1] = pci_map_page(mac->dma_pdev, frag->page,
1508 frag->page_offset, frag->size,
1510 map_size[i+1] = frag->size;
1511 if (pci_dma_mapping_error(mac->dma_pdev, map[i+1])) {
1513 goto out_err_nolock;
1517 if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) {
1518 switch (ip_hdr(skb)->protocol) {
1520 dflags |= XCT_MACTX_CSUM_TCP;
1521 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1522 dflags |= XCT_MACTX_IPO(nh_off);
1525 dflags |= XCT_MACTX_CSUM_UDP;
1526 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1527 dflags |= XCT_MACTX_IPO(nh_off);
1534 mactx = dflags | XCT_MACTX_LLEN(skb->len);
1536 spin_lock_irqsave(&txring->lock, flags);
1538 /* Avoid stepping on the same cache line that the DMA controller
1539 * is currently about to send, so leave at least 8 words available.
1540 * Total free space needed is mactx + fragments + 8
1542 if (RING_AVAIL(txring) < nfrags + 14) {
1543 /* no room -- stop the queue and wait for tx intr */
1544 netif_stop_queue(dev);
1548 /* Queue up checksum + event descriptors, if needed */
1549 if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) {
1550 csring = mac->cs[mac->last_cs];
1551 mac->last_cs = (mac->last_cs + 1) % mac->num_cs;
1553 pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring);
1556 fill = txring->next_to_fill;
1557 TX_DESC(txring, fill) = mactx;
1558 TX_DESC_INFO(txring, fill).dma = nfrags;
1560 TX_DESC_INFO(txring, fill).skb = skb;
1561 for (i = 0; i <= nfrags; i++) {
1562 TX_DESC(txring, fill+i) =
1563 XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1564 TX_DESC_INFO(txring, fill+i).dma = map[i];
1567 /* We have to add an even number of 8-byte entries to the ring
1568 * even if the last one is unused. That means always an odd number
1569 * of pointers + one mactx descriptor.
1574 txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1);
1576 dev->stats.tx_packets++;
1577 dev->stats.tx_bytes += skb->len;
1579 spin_unlock_irqrestore(&txring->lock, flags);
1581 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1);
1583 return NETDEV_TX_OK;
1586 spin_unlock_irqrestore(&txring->lock, flags);
1589 pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags],
1592 return NETDEV_TX_BUSY;
1595 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1597 const struct pasemi_mac *mac = netdev_priv(dev);
1600 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1602 /* Set promiscuous */
1603 if (dev->flags & IFF_PROMISC)
1604 flags |= PAS_MAC_CFG_PCFG_PR;
1606 flags &= ~PAS_MAC_CFG_PCFG_PR;
1608 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1612 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1614 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1617 pasemi_mac_clean_tx(tx_ring(mac));
1618 pkts = pasemi_mac_clean_rx(rx_ring(mac), budget);
1619 if (pkts < budget) {
1620 /* all done, no more packets present */
1621 napi_complete(napi);
1623 pasemi_mac_restart_rx_intr(mac);
1624 pasemi_mac_restart_tx_intr(mac);
1629 #ifdef CONFIG_NET_POLL_CONTROLLER
1631 * Polling 'interrupt' - used by things like netconsole to send skbs
1632 * without having to re-enable interrupts. It's not called while
1633 * the interrupt routine is executing.
1635 static void pasemi_mac_netpoll(struct net_device *dev)
1637 const struct pasemi_mac *mac = netdev_priv(dev);
1639 disable_irq(mac->tx->chan.irq);
1640 pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx);
1641 enable_irq(mac->tx->chan.irq);
1643 disable_irq(mac->rx->chan.irq);
1644 pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx);
1645 enable_irq(mac->rx->chan.irq);
1649 static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
1651 struct pasemi_mac *mac = netdev_priv(dev);
1653 unsigned int rcmdsta = 0;
1657 if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU)
1660 running = netif_running(dev);
1663 /* Need to stop the interface, clean out all already
1664 * received buffers, free all unused buffers on the RX
1665 * interface ring, then finally re-fill the rx ring with
1666 * the new-size buffers and restart.
1669 napi_disable(&mac->napi);
1670 netif_tx_disable(dev);
1671 pasemi_mac_intf_disable(mac);
1673 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1674 pasemi_mac_pause_rxint(mac);
1675 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1676 pasemi_mac_free_rx_buffers(mac);
1680 /* Setup checksum channels if large MTU and none already allocated */
1681 if (new_mtu > 1500 && !mac->num_cs) {
1682 pasemi_mac_setup_csrings(mac);
1689 /* Change maxf, i.e. what size frames are accepted.
1690 * Need room for ethernet header and CRC word
1692 reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG);
1693 reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M;
1694 reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
1695 write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
1698 /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1699 mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1703 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1704 rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN);
1706 rx_ring(mac)->next_to_fill = 0;
1707 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1);
1709 napi_enable(&mac->napi);
1710 netif_start_queue(dev);
1711 pasemi_mac_intf_enable(mac);
1717 static const struct net_device_ops pasemi_netdev_ops = {
1718 .ndo_open = pasemi_mac_open,
1719 .ndo_stop = pasemi_mac_close,
1720 .ndo_start_xmit = pasemi_mac_start_tx,
1721 .ndo_set_multicast_list = pasemi_mac_set_rx_mode,
1722 .ndo_set_mac_address = pasemi_mac_set_mac_addr,
1723 .ndo_change_mtu = pasemi_mac_change_mtu,
1724 .ndo_validate_addr = eth_validate_addr,
1725 #ifdef CONFIG_NET_POLL_CONTROLLER
1726 .ndo_poll_controller = pasemi_mac_netpoll,
1730 static int __devinit
1731 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1733 struct net_device *dev;
1734 struct pasemi_mac *mac;
1737 err = pci_enable_device(pdev);
1741 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1744 "pasemi_mac: Could not allocate ethernet device.\n");
1746 goto out_disable_device;
1749 pci_set_drvdata(pdev, dev);
1750 SET_NETDEV_DEV(dev, &pdev->dev);
1752 mac = netdev_priv(dev);
1757 netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1759 dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG |
1760 NETIF_F_HIGHDMA | NETIF_F_GSO;
1762 mac->lro_mgr.max_aggr = LRO_MAX_AGGR;
1763 mac->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1764 mac->lro_mgr.lro_arr = mac->lro_desc;
1765 mac->lro_mgr.get_skb_header = get_skb_hdr;
1766 mac->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1767 mac->lro_mgr.dev = mac->netdev;
1768 mac->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1769 mac->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1772 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1773 if (!mac->dma_pdev) {
1774 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1779 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1780 if (!mac->iob_pdev) {
1781 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1786 /* get mac addr from device tree */
1787 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1791 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1793 ret = mac_to_intf(mac);
1795 dev_err(&mac->pdev->dev, "Can't map DMA interface\n");
1801 switch (pdev->device) {
1803 mac->type = MAC_TYPE_GMAC;
1806 mac->type = MAC_TYPE_XAUI;
1813 dev->netdev_ops = &pasemi_netdev_ops;
1814 dev->mtu = PE_DEF_MTU;
1815 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1816 mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1818 dev->ethtool_ops = &pasemi_mac_ethtool_ops;
1823 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1825 /* Enable most messages by default */
1826 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1828 err = register_netdev(dev);
1831 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1834 } else if netif_msg_probe(mac)
1835 printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %pM\n",
1836 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1837 mac->dma_if, dev->dev_addr);
1843 pci_dev_put(mac->iob_pdev);
1845 pci_dev_put(mac->dma_pdev);
1849 pci_disable_device(pdev);
1854 static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1856 struct net_device *netdev = pci_get_drvdata(pdev);
1857 struct pasemi_mac *mac;
1862 mac = netdev_priv(netdev);
1864 unregister_netdev(netdev);
1866 pci_disable_device(pdev);
1867 pci_dev_put(mac->dma_pdev);
1868 pci_dev_put(mac->iob_pdev);
1870 pasemi_dma_free_chan(&mac->tx->chan);
1871 pasemi_dma_free_chan(&mac->rx->chan);
1873 pci_set_drvdata(pdev, NULL);
1874 free_netdev(netdev);
1877 static DEFINE_PCI_DEVICE_TABLE(pasemi_mac_pci_tbl) = {
1878 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1879 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1883 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1885 static struct pci_driver pasemi_mac_driver = {
1886 .name = "pasemi_mac",
1887 .id_table = pasemi_mac_pci_tbl,
1888 .probe = pasemi_mac_probe,
1889 .remove = __devexit_p(pasemi_mac_remove),
1892 static void __exit pasemi_mac_cleanup_module(void)
1894 pci_unregister_driver(&pasemi_mac_driver);
1897 int pasemi_mac_init_module(void)
1901 err = pasemi_dma_init();
1905 return pci_register_driver(&pasemi_mac_driver);
1908 module_init(pasemi_mac_init_module);
1909 module_exit(pasemi_mac_cleanup_module);