1 /* 8139cp.c: A Linux PCI Ethernet driver for the RealTek 8139C+ chips. */
3 Copyright 2001-2004 Jeff Garzik <jgarzik@pobox.com>
5 Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com) [tg3.c]
6 Copyright (C) 2000, 2001 David S. Miller (davem@redhat.com) [sungem.c]
7 Copyright 2001 Manfred Spraul [natsemi.c]
8 Copyright 1999-2001 by Donald Becker. [natsemi.c]
9 Written 1997-2001 by Donald Becker. [8139too.c]
10 Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>. [acenic.c]
12 This software may be used and distributed according to the terms of
13 the GNU General Public License (GPL), incorporated herein by reference.
14 Drivers based on or derived from this code fall under the GPL and must
15 retain the authorship, copyright and license notice. This file is not
16 a complete program and may only be used when the entire operating
17 system is licensed under the GPL.
19 See the file COPYING in this distribution for more information.
23 Wake-on-LAN support - Felipe Damasio <felipewd@terra.com.br>
24 PCI suspend/resume - Felipe Damasio <felipewd@terra.com.br>
25 LinkChg interrupt - Felipe Damasio <felipewd@terra.com.br>
28 * Test Tx checksumming thoroughly
31 * Complete reset on PciErr
32 * Consider Rx interrupt mitigation using TimerIntr
33 * Investigate using skb->priority with h/w VLAN priority
34 * Investigate using High Priority Tx Queue with skb->priority
35 * Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error
36 * Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error
37 * Implement Tx software interrupt mitigation via
39 * The real minimum of CP_MIN_MTU is 4 bytes. However,
40 for this to be supported, one must(?) turn on packet padding.
41 * Support external MII transceivers (patch available)
44 * TX checksumming is considered experimental. It is off by
45 default, use ethtool to turn it on.
49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
51 #define DRV_NAME "8139cp"
52 #define DRV_VERSION "1.3"
53 #define DRV_RELDATE "Mar 22, 2004"
56 #include <linux/module.h>
57 #include <linux/moduleparam.h>
58 #include <linux/kernel.h>
59 #include <linux/compiler.h>
60 #include <linux/netdevice.h>
61 #include <linux/etherdevice.h>
62 #include <linux/init.h>
63 #include <linux/interrupt.h>
64 #include <linux/pci.h>
65 #include <linux/dma-mapping.h>
66 #include <linux/delay.h>
67 #include <linux/ethtool.h>
68 #include <linux/gfp.h>
69 #include <linux/mii.h>
70 #include <linux/if_vlan.h>
71 #include <linux/crc32.h>
74 #include <linux/tcp.h>
75 #include <linux/udp.h>
76 #include <linux/cache.h>
79 #include <asm/uaccess.h>
81 /* These identify the driver base version and may not be removed. */
82 static char version[] =
83 DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE ")\n";
85 MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
86 MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver");
87 MODULE_VERSION(DRV_VERSION);
88 MODULE_LICENSE("GPL");
90 static int debug = -1;
91 module_param(debug, int, 0);
92 MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
94 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
95 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
96 static int multicast_filter_limit = 32;
97 module_param(multicast_filter_limit, int, 0);
98 MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses");
100 #define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
103 #define CP_NUM_STATS 14 /* struct cp_dma_stats, plus one */
104 #define CP_STATS_SIZE 64 /* size in bytes of DMA stats block */
105 #define CP_REGS_SIZE (0xff + 1)
106 #define CP_REGS_VER 1 /* version 1 */
107 #define CP_RX_RING_SIZE 64
108 #define CP_TX_RING_SIZE 64
109 #define CP_RING_BYTES \
110 ((sizeof(struct cp_desc) * CP_RX_RING_SIZE) + \
111 (sizeof(struct cp_desc) * CP_TX_RING_SIZE) + \
113 #define NEXT_TX(N) (((N) + 1) & (CP_TX_RING_SIZE - 1))
114 #define NEXT_RX(N) (((N) + 1) & (CP_RX_RING_SIZE - 1))
115 #define TX_BUFFS_AVAIL(CP) \
116 (((CP)->tx_tail <= (CP)->tx_head) ? \
117 (CP)->tx_tail + (CP_TX_RING_SIZE - 1) - (CP)->tx_head : \
118 (CP)->tx_tail - (CP)->tx_head - 1)
120 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
121 #define CP_INTERNAL_PHY 32
123 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
124 #define RX_FIFO_THRESH 5 /* Rx buffer level before first PCI xfer. */
125 #define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 */
126 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
127 #define TX_EARLY_THRESH 256 /* Early Tx threshold, in bytes */
129 /* Time in jiffies before concluding the transmitter is hung. */
130 #define TX_TIMEOUT (6*HZ)
132 /* hardware minimum and maximum for a single frame's data payload */
133 #define CP_MIN_MTU 60 /* TODO: allow lower, but pad */
134 #define CP_MAX_MTU 4096
137 /* NIC register offsets */
138 MAC0 = 0x00, /* Ethernet hardware address. */
139 MAR0 = 0x08, /* Multicast filter. */
140 StatsAddr = 0x10, /* 64-bit start addr of 64-byte DMA stats blk */
141 TxRingAddr = 0x20, /* 64-bit start addr of Tx ring */
142 HiTxRingAddr = 0x28, /* 64-bit start addr of high priority Tx ring */
143 Cmd = 0x37, /* Command register */
144 IntrMask = 0x3C, /* Interrupt mask */
145 IntrStatus = 0x3E, /* Interrupt status */
146 TxConfig = 0x40, /* Tx configuration */
147 ChipVersion = 0x43, /* 8-bit chip version, inside TxConfig */
148 RxConfig = 0x44, /* Rx configuration */
149 RxMissed = 0x4C, /* 24 bits valid, write clears */
150 Cfg9346 = 0x50, /* EEPROM select/control; Cfg reg [un]lock */
151 Config1 = 0x52, /* Config1 */
152 Config3 = 0x59, /* Config3 */
153 Config4 = 0x5A, /* Config4 */
154 MultiIntr = 0x5C, /* Multiple interrupt select */
155 BasicModeCtrl = 0x62, /* MII BMCR */
156 BasicModeStatus = 0x64, /* MII BMSR */
157 NWayAdvert = 0x66, /* MII ADVERTISE */
158 NWayLPAR = 0x68, /* MII LPA */
159 NWayExpansion = 0x6A, /* MII Expansion */
160 Config5 = 0xD8, /* Config5 */
161 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
162 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
163 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
164 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
165 RxRingAddr = 0xE4, /* 64-bit start addr of Rx ring */
166 TxThresh = 0xEC, /* Early Tx threshold */
167 OldRxBufAddr = 0x30, /* DMA address of Rx ring buffer (C mode) */
168 OldTSD0 = 0x10, /* DMA address of first Tx desc (C mode) */
170 /* Tx and Rx status descriptors */
171 DescOwn = (1 << 31), /* Descriptor is owned by NIC */
172 RingEnd = (1 << 30), /* End of descriptor ring */
173 FirstFrag = (1 << 29), /* First segment of a packet */
174 LastFrag = (1 << 28), /* Final segment of a packet */
175 LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */
176 MSSShift = 16, /* MSS value position */
177 MSSMask = 0xfff, /* MSS value: 11 bits */
178 TxError = (1 << 23), /* Tx error summary */
179 RxError = (1 << 20), /* Rx error summary */
180 IPCS = (1 << 18), /* Calculate IP checksum */
181 UDPCS = (1 << 17), /* Calculate UDP/IP checksum */
182 TCPCS = (1 << 16), /* Calculate TCP/IP checksum */
183 TxVlanTag = (1 << 17), /* Add VLAN tag */
184 RxVlanTagged = (1 << 16), /* Rx VLAN tag available */
185 IPFail = (1 << 15), /* IP checksum failed */
186 UDPFail = (1 << 14), /* UDP/IP checksum failed */
187 TCPFail = (1 << 13), /* TCP/IP checksum failed */
188 NormalTxPoll = (1 << 6), /* One or more normal Tx packets to send */
189 PID1 = (1 << 17), /* 2 protocol id bits: 0==non-IP, */
190 PID0 = (1 << 16), /* 1==UDP/IP, 2==TCP/IP, 3==IP */
194 TxFIFOUnder = (1 << 25), /* Tx FIFO underrun */
195 TxOWC = (1 << 22), /* Tx Out-of-window collision */
196 TxLinkFail = (1 << 21), /* Link failed during Tx of packet */
197 TxMaxCol = (1 << 20), /* Tx aborted due to excessive collisions */
198 TxColCntShift = 16, /* Shift, to get 4-bit Tx collision cnt */
199 TxColCntMask = 0x01 | 0x02 | 0x04 | 0x08, /* 4-bit collision count */
200 RxErrFrame = (1 << 27), /* Rx frame alignment error */
201 RxMcast = (1 << 26), /* Rx multicast packet rcv'd */
202 RxErrCRC = (1 << 18), /* Rx CRC error */
203 RxErrRunt = (1 << 19), /* Rx error, packet < 64 bytes */
204 RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */
205 RxErrFIFO = (1 << 22), /* Rx error, FIFO overflowed, pkt bad */
207 /* StatsAddr register */
208 DumpStats = (1 << 3), /* Begin stats dump */
210 /* RxConfig register */
211 RxCfgFIFOShift = 13, /* Shift, to get Rx FIFO thresh value */
212 RxCfgDMAShift = 8, /* Shift, to get Rx Max DMA value */
213 AcceptErr = 0x20, /* Accept packets with CRC errors */
214 AcceptRunt = 0x10, /* Accept runt (<64 bytes) packets */
215 AcceptBroadcast = 0x08, /* Accept broadcast packets */
216 AcceptMulticast = 0x04, /* Accept multicast packets */
217 AcceptMyPhys = 0x02, /* Accept pkts with our MAC as dest */
218 AcceptAllPhys = 0x01, /* Accept all pkts w/ physical dest */
220 /* IntrMask / IntrStatus registers */
221 PciErr = (1 << 15), /* System error on the PCI bus */
222 TimerIntr = (1 << 14), /* Asserted when TCTR reaches TimerInt value */
223 LenChg = (1 << 13), /* Cable length change */
224 SWInt = (1 << 8), /* Software-requested interrupt */
225 TxEmpty = (1 << 7), /* No Tx descriptors available */
226 RxFIFOOvr = (1 << 6), /* Rx FIFO Overflow */
227 LinkChg = (1 << 5), /* Packet underrun, or link change */
228 RxEmpty = (1 << 4), /* No Rx descriptors available */
229 TxErr = (1 << 3), /* Tx error */
230 TxOK = (1 << 2), /* Tx packet sent */
231 RxErr = (1 << 1), /* Rx error */
232 RxOK = (1 << 0), /* Rx packet received */
233 IntrResvd = (1 << 10), /* reserved, according to RealTek engineers,
234 but hardware likes to raise it */
236 IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty |
237 RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK |
238 RxErr | RxOK | IntrResvd,
240 /* C mode command register */
241 CmdReset = (1 << 4), /* Enable to reset; self-clearing */
242 RxOn = (1 << 3), /* Rx mode enable */
243 TxOn = (1 << 2), /* Tx mode enable */
245 /* C+ mode command register */
246 RxVlanOn = (1 << 6), /* Rx VLAN de-tagging enable */
247 RxChkSum = (1 << 5), /* Rx checksum offload enable */
248 PCIDAC = (1 << 4), /* PCI Dual Address Cycle (64-bit PCI) */
249 PCIMulRW = (1 << 3), /* Enable PCI read/write multiple */
250 CpRxOn = (1 << 1), /* Rx mode enable */
251 CpTxOn = (1 << 0), /* Tx mode enable */
253 /* Cfg9436 EEPROM control register */
254 Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */
255 Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */
257 /* TxConfig register */
258 IFG = (1 << 25) | (1 << 24), /* standard IEEE interframe gap */
259 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
261 /* Early Tx Threshold register */
262 TxThreshMask = 0x3f, /* Mask bits 5-0 */
263 TxThreshMax = 2048, /* Max early Tx threshold */
265 /* Config1 register */
266 DriverLoaded = (1 << 5), /* Software marker, driver is loaded */
267 LWACT = (1 << 4), /* LWAKE active mode */
268 PMEnable = (1 << 0), /* Enable various PM features of chip */
270 /* Config3 register */
271 PARMEnable = (1 << 6), /* Enable auto-loading of PHY parms */
272 MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */
273 LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */
275 /* Config4 register */
276 LWPTN = (1 << 1), /* LWAKE Pattern */
277 LWPME = (1 << 4), /* LANWAKE vs PMEB */
279 /* Config5 register */
280 BWF = (1 << 6), /* Accept Broadcast wakeup frame */
281 MWF = (1 << 5), /* Accept Multicast wakeup frame */
282 UWF = (1 << 4), /* Accept Unicast wakeup frame */
283 LANWake = (1 << 1), /* Enable LANWake signal */
284 PMEStatus = (1 << 0), /* PME status can be reset by PCI RST# */
286 cp_norx_intr_mask = PciErr | LinkChg | TxOK | TxErr | TxEmpty,
287 cp_rx_intr_mask = RxOK | RxErr | RxEmpty | RxFIFOOvr,
288 cp_intr_mask = cp_rx_intr_mask | cp_norx_intr_mask,
291 static const unsigned int cp_rx_config =
292 (RX_FIFO_THRESH << RxCfgFIFOShift) |
293 (RX_DMA_BURST << RxCfgDMAShift);
301 struct cp_dma_stats {
317 struct cp_extra_stats {
318 unsigned long rx_frags;
323 struct net_device *dev;
327 struct napi_struct napi;
329 struct pci_dev *pdev;
333 struct cp_extra_stats cp_stats;
335 unsigned rx_head ____cacheline_aligned;
337 struct cp_desc *rx_ring;
338 struct sk_buff *rx_skb[CP_RX_RING_SIZE];
340 unsigned tx_head ____cacheline_aligned;
342 struct cp_desc *tx_ring;
343 struct sk_buff *tx_skb[CP_TX_RING_SIZE];
346 unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */
350 struct mii_if_info mii_if;
353 #define cpr8(reg) readb(cp->regs + (reg))
354 #define cpr16(reg) readw(cp->regs + (reg))
355 #define cpr32(reg) readl(cp->regs + (reg))
356 #define cpw8(reg,val) writeb((val), cp->regs + (reg))
357 #define cpw16(reg,val) writew((val), cp->regs + (reg))
358 #define cpw32(reg,val) writel((val), cp->regs + (reg))
359 #define cpw8_f(reg,val) do { \
360 writeb((val), cp->regs + (reg)); \
361 readb(cp->regs + (reg)); \
363 #define cpw16_f(reg,val) do { \
364 writew((val), cp->regs + (reg)); \
365 readw(cp->regs + (reg)); \
367 #define cpw32_f(reg,val) do { \
368 writel((val), cp->regs + (reg)); \
369 readl(cp->regs + (reg)); \
373 static void __cp_set_rx_mode (struct net_device *dev);
374 static void cp_tx (struct cp_private *cp);
375 static void cp_clean_rings (struct cp_private *cp);
376 #ifdef CONFIG_NET_POLL_CONTROLLER
377 static void cp_poll_controller(struct net_device *dev);
379 static int cp_get_eeprom_len(struct net_device *dev);
380 static int cp_get_eeprom(struct net_device *dev,
381 struct ethtool_eeprom *eeprom, u8 *data);
382 static int cp_set_eeprom(struct net_device *dev,
383 struct ethtool_eeprom *eeprom, u8 *data);
385 static DEFINE_PCI_DEVICE_TABLE(cp_pci_tbl) = {
386 { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
387 { PCI_DEVICE(PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322), },
390 MODULE_DEVICE_TABLE(pci, cp_pci_tbl);
393 const char str[ETH_GSTRING_LEN];
394 } ethtool_stats_keys[] = {
412 static inline void cp_set_rxbufsize (struct cp_private *cp)
414 unsigned int mtu = cp->dev->mtu;
416 if (mtu > ETH_DATA_LEN)
417 /* MTU + ethernet header + FCS + optional VLAN tag */
418 cp->rx_buf_sz = mtu + ETH_HLEN + 8;
420 cp->rx_buf_sz = PKT_BUF_SZ;
423 static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb,
424 struct cp_desc *desc)
426 u32 opts2 = le32_to_cpu(desc->opts2);
428 skb->protocol = eth_type_trans (skb, cp->dev);
430 cp->dev->stats.rx_packets++;
431 cp->dev->stats.rx_bytes += skb->len;
433 if (opts2 & RxVlanTagged)
434 __vlan_hwaccel_put_tag(skb, swab16(opts2 & 0xffff));
436 napi_gro_receive(&cp->napi, skb);
439 static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail,
442 netif_dbg(cp, rx_err, cp->dev, "rx err, slot %d status 0x%x len %d\n",
443 rx_tail, status, len);
444 cp->dev->stats.rx_errors++;
445 if (status & RxErrFrame)
446 cp->dev->stats.rx_frame_errors++;
447 if (status & RxErrCRC)
448 cp->dev->stats.rx_crc_errors++;
449 if ((status & RxErrRunt) || (status & RxErrLong))
450 cp->dev->stats.rx_length_errors++;
451 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag))
452 cp->dev->stats.rx_length_errors++;
453 if (status & RxErrFIFO)
454 cp->dev->stats.rx_fifo_errors++;
457 static inline unsigned int cp_rx_csum_ok (u32 status)
459 unsigned int protocol = (status >> 16) & 0x3;
461 if (((protocol == RxProtoTCP) && !(status & TCPFail)) ||
462 ((protocol == RxProtoUDP) && !(status & UDPFail)))
468 static int cp_rx_poll(struct napi_struct *napi, int budget)
470 struct cp_private *cp = container_of(napi, struct cp_private, napi);
471 struct net_device *dev = cp->dev;
472 unsigned int rx_tail = cp->rx_tail;
477 cpw16(IntrStatus, cp_rx_intr_mask);
482 struct sk_buff *skb, *new_skb;
483 struct cp_desc *desc;
484 const unsigned buflen = cp->rx_buf_sz;
486 skb = cp->rx_skb[rx_tail];
489 desc = &cp->rx_ring[rx_tail];
490 status = le32_to_cpu(desc->opts1);
491 if (status & DescOwn)
494 len = (status & 0x1fff) - 4;
495 mapping = le64_to_cpu(desc->addr);
497 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) {
498 /* we don't support incoming fragmented frames.
499 * instead, we attempt to ensure that the
500 * pre-allocated RX skbs are properly sized such
501 * that RX fragments are never encountered
503 cp_rx_err_acct(cp, rx_tail, status, len);
504 dev->stats.rx_dropped++;
505 cp->cp_stats.rx_frags++;
509 if (status & (RxError | RxErrFIFO)) {
510 cp_rx_err_acct(cp, rx_tail, status, len);
514 netif_dbg(cp, rx_status, dev, "rx slot %d status 0x%x len %d\n",
515 rx_tail, status, len);
517 new_skb = netdev_alloc_skb_ip_align(dev, buflen);
519 dev->stats.rx_dropped++;
523 dma_unmap_single(&cp->pdev->dev, mapping,
524 buflen, PCI_DMA_FROMDEVICE);
526 /* Handle checksum offloading for incoming packets. */
527 if (cp_rx_csum_ok(status))
528 skb->ip_summed = CHECKSUM_UNNECESSARY;
530 skb_checksum_none_assert(skb);
534 mapping = dma_map_single(&cp->pdev->dev, new_skb->data, buflen,
536 cp->rx_skb[rx_tail] = new_skb;
538 cp_rx_skb(cp, skb, desc);
542 cp->rx_ring[rx_tail].opts2 = 0;
543 cp->rx_ring[rx_tail].addr = cpu_to_le64(mapping);
544 if (rx_tail == (CP_RX_RING_SIZE - 1))
545 desc->opts1 = cpu_to_le32(DescOwn | RingEnd |
548 desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
549 rx_tail = NEXT_RX(rx_tail);
555 cp->rx_tail = rx_tail;
557 /* if we did not reach work limit, then we're done with
558 * this round of polling
563 if (cpr16(IntrStatus) & cp_rx_intr_mask)
566 napi_gro_flush(napi, false);
567 spin_lock_irqsave(&cp->lock, flags);
568 __napi_complete(napi);
569 cpw16_f(IntrMask, cp_intr_mask);
570 spin_unlock_irqrestore(&cp->lock, flags);
576 static irqreturn_t cp_interrupt (int irq, void *dev_instance)
578 struct net_device *dev = dev_instance;
579 struct cp_private *cp;
582 if (unlikely(dev == NULL))
584 cp = netdev_priv(dev);
586 status = cpr16(IntrStatus);
587 if (!status || (status == 0xFFFF))
590 netif_dbg(cp, intr, dev, "intr, status %04x cmd %02x cpcmd %04x\n",
591 status, cpr8(Cmd), cpr16(CpCmd));
593 cpw16(IntrStatus, status & ~cp_rx_intr_mask);
595 spin_lock(&cp->lock);
597 /* close possible race's with dev_close */
598 if (unlikely(!netif_running(dev))) {
600 spin_unlock(&cp->lock);
604 if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
605 if (napi_schedule_prep(&cp->napi)) {
606 cpw16_f(IntrMask, cp_norx_intr_mask);
607 __napi_schedule(&cp->napi);
610 if (status & (TxOK | TxErr | TxEmpty | SWInt))
612 if (status & LinkChg)
613 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
615 spin_unlock(&cp->lock);
617 if (status & PciErr) {
620 pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
621 pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
622 netdev_err(dev, "PCI bus error, status=%04x, PCI status=%04x\n",
625 /* TODO: reset hardware */
631 #ifdef CONFIG_NET_POLL_CONTROLLER
633 * Polling receive - used by netconsole and other diagnostic tools
634 * to allow network i/o with interrupts disabled.
636 static void cp_poll_controller(struct net_device *dev)
638 struct cp_private *cp = netdev_priv(dev);
639 const int irq = cp->pdev->irq;
642 cp_interrupt(irq, dev);
647 static void cp_tx (struct cp_private *cp)
649 unsigned tx_head = cp->tx_head;
650 unsigned tx_tail = cp->tx_tail;
651 unsigned bytes_compl = 0, pkts_compl = 0;
653 while (tx_tail != tx_head) {
654 struct cp_desc *txd = cp->tx_ring + tx_tail;
659 status = le32_to_cpu(txd->opts1);
660 if (status & DescOwn)
663 skb = cp->tx_skb[tx_tail];
666 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
667 le32_to_cpu(txd->opts1) & 0xffff,
670 bytes_compl += skb->len;
673 if (status & LastFrag) {
674 if (status & (TxError | TxFIFOUnder)) {
675 netif_dbg(cp, tx_err, cp->dev,
676 "tx err, status 0x%x\n", status);
677 cp->dev->stats.tx_errors++;
679 cp->dev->stats.tx_window_errors++;
680 if (status & TxMaxCol)
681 cp->dev->stats.tx_aborted_errors++;
682 if (status & TxLinkFail)
683 cp->dev->stats.tx_carrier_errors++;
684 if (status & TxFIFOUnder)
685 cp->dev->stats.tx_fifo_errors++;
687 cp->dev->stats.collisions +=
688 ((status >> TxColCntShift) & TxColCntMask);
689 cp->dev->stats.tx_packets++;
690 cp->dev->stats.tx_bytes += skb->len;
691 netif_dbg(cp, tx_done, cp->dev,
692 "tx done, slot %d\n", tx_tail);
694 dev_kfree_skb_irq(skb);
697 cp->tx_skb[tx_tail] = NULL;
699 tx_tail = NEXT_TX(tx_tail);
702 cp->tx_tail = tx_tail;
704 netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
705 if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
706 netif_wake_queue(cp->dev);
709 static inline u32 cp_tx_vlan_tag(struct sk_buff *skb)
711 return vlan_tx_tag_present(skb) ?
712 TxVlanTag | swab16(vlan_tx_tag_get(skb)) : 0x00;
715 static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
716 struct net_device *dev)
718 struct cp_private *cp = netdev_priv(dev);
721 unsigned long intr_flags;
725 spin_lock_irqsave(&cp->lock, intr_flags);
727 /* This is a hard error, log it. */
728 if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) {
729 netif_stop_queue(dev);
730 spin_unlock_irqrestore(&cp->lock, intr_flags);
731 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
732 return NETDEV_TX_BUSY;
736 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
737 mss = skb_shinfo(skb)->gso_size;
739 opts2 = cpu_to_le32(cp_tx_vlan_tag(skb));
741 if (skb_shinfo(skb)->nr_frags == 0) {
742 struct cp_desc *txd = &cp->tx_ring[entry];
747 mapping = dma_map_single(&cp->pdev->dev, skb->data, len, PCI_DMA_TODEVICE);
749 txd->addr = cpu_to_le64(mapping);
752 flags = eor | len | DescOwn | FirstFrag | LastFrag;
755 flags |= LargeSend | ((mss & MSSMask) << MSSShift);
756 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
757 const struct iphdr *ip = ip_hdr(skb);
758 if (ip->protocol == IPPROTO_TCP)
759 flags |= IPCS | TCPCS;
760 else if (ip->protocol == IPPROTO_UDP)
761 flags |= IPCS | UDPCS;
763 WARN_ON(1); /* we need a WARN() */
766 txd->opts1 = cpu_to_le32(flags);
769 cp->tx_skb[entry] = skb;
770 entry = NEXT_TX(entry);
773 u32 first_len, first_eor;
774 dma_addr_t first_mapping;
775 int frag, first_entry = entry;
776 const struct iphdr *ip = ip_hdr(skb);
778 /* We must give this initial chunk to the device last.
779 * Otherwise we could race with the device.
782 first_len = skb_headlen(skb);
783 first_mapping = dma_map_single(&cp->pdev->dev, skb->data,
784 first_len, PCI_DMA_TODEVICE);
785 cp->tx_skb[entry] = skb;
786 entry = NEXT_TX(entry);
788 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
789 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
794 len = skb_frag_size(this_frag);
795 mapping = dma_map_single(&cp->pdev->dev,
796 skb_frag_address(this_frag),
797 len, PCI_DMA_TODEVICE);
798 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
800 ctrl = eor | len | DescOwn;
804 ((mss & MSSMask) << MSSShift);
805 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
806 if (ip->protocol == IPPROTO_TCP)
807 ctrl |= IPCS | TCPCS;
808 else if (ip->protocol == IPPROTO_UDP)
809 ctrl |= IPCS | UDPCS;
814 if (frag == skb_shinfo(skb)->nr_frags - 1)
817 txd = &cp->tx_ring[entry];
819 txd->addr = cpu_to_le64(mapping);
822 txd->opts1 = cpu_to_le32(ctrl);
825 cp->tx_skb[entry] = skb;
826 entry = NEXT_TX(entry);
829 txd = &cp->tx_ring[first_entry];
831 txd->addr = cpu_to_le64(first_mapping);
834 if (skb->ip_summed == CHECKSUM_PARTIAL) {
835 if (ip->protocol == IPPROTO_TCP)
836 txd->opts1 = cpu_to_le32(first_eor | first_len |
837 FirstFrag | DescOwn |
839 else if (ip->protocol == IPPROTO_UDP)
840 txd->opts1 = cpu_to_le32(first_eor | first_len |
841 FirstFrag | DescOwn |
846 txd->opts1 = cpu_to_le32(first_eor | first_len |
847 FirstFrag | DescOwn);
852 netdev_sent_queue(dev, skb->len);
853 netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
855 if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
856 netif_stop_queue(dev);
858 spin_unlock_irqrestore(&cp->lock, intr_flags);
860 cpw8(TxPoll, NormalTxPoll);
865 /* Set or clear the multicast filter for this adaptor.
866 This routine is not state sensitive and need not be SMP locked. */
868 static void __cp_set_rx_mode (struct net_device *dev)
870 struct cp_private *cp = netdev_priv(dev);
871 u32 mc_filter[2]; /* Multicast hash filter */
874 /* Note: do not reorder, GCC is clever about common statements. */
875 if (dev->flags & IFF_PROMISC) {
876 /* Unconditionally log net taps. */
878 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
880 mc_filter[1] = mc_filter[0] = 0xffffffff;
881 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
882 (dev->flags & IFF_ALLMULTI)) {
883 /* Too many to filter perfectly -- accept all multicasts. */
884 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
885 mc_filter[1] = mc_filter[0] = 0xffffffff;
887 struct netdev_hw_addr *ha;
888 rx_mode = AcceptBroadcast | AcceptMyPhys;
889 mc_filter[1] = mc_filter[0] = 0;
890 netdev_for_each_mc_addr(ha, dev) {
891 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
893 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
894 rx_mode |= AcceptMulticast;
898 /* We can safely update without stopping the chip. */
899 cp->rx_config = cp_rx_config | rx_mode;
900 cpw32_f(RxConfig, cp->rx_config);
902 cpw32_f (MAR0 + 0, mc_filter[0]);
903 cpw32_f (MAR0 + 4, mc_filter[1]);
906 static void cp_set_rx_mode (struct net_device *dev)
909 struct cp_private *cp = netdev_priv(dev);
911 spin_lock_irqsave (&cp->lock, flags);
912 __cp_set_rx_mode(dev);
913 spin_unlock_irqrestore (&cp->lock, flags);
916 static void __cp_get_stats(struct cp_private *cp)
918 /* only lower 24 bits valid; write any value to clear */
919 cp->dev->stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff);
923 static struct net_device_stats *cp_get_stats(struct net_device *dev)
925 struct cp_private *cp = netdev_priv(dev);
928 /* The chip only need report frame silently dropped. */
929 spin_lock_irqsave(&cp->lock, flags);
930 if (netif_running(dev) && netif_device_present(dev))
932 spin_unlock_irqrestore(&cp->lock, flags);
937 static void cp_stop_hw (struct cp_private *cp)
939 cpw16(IntrStatus, ~(cpr16(IntrStatus)));
940 cpw16_f(IntrMask, 0);
943 cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));
946 cp->tx_head = cp->tx_tail = 0;
948 netdev_reset_queue(cp->dev);
951 static void cp_reset_hw (struct cp_private *cp)
953 unsigned work = 1000;
958 if (!(cpr8(Cmd) & CmdReset))
961 schedule_timeout_uninterruptible(10);
964 netdev_err(cp->dev, "hardware reset timeout\n");
967 static inline void cp_start_hw (struct cp_private *cp)
971 cpw16(CpCmd, cp->cpcmd);
974 * These (at least TxRingAddr) need to be configured after the
975 * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
976 * (C+ Command Register) recommends that these and more be configured
977 * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
978 * it's been observed that the TxRingAddr is actually reset to garbage
979 * when C+ mode Tx is enabled in CpCmd.
981 cpw32_f(HiTxRingAddr, 0);
982 cpw32_f(HiTxRingAddr + 4, 0);
984 ring_dma = cp->ring_dma;
985 cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
986 cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
988 ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
989 cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
990 cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
993 * Strictly speaking, the datasheet says this should be enabled
994 * *before* setting the descriptor addresses. But what, then, would
995 * prevent it from doing DMA to random unconfigured addresses?
996 * This variant appears to work fine.
998 cpw8(Cmd, RxOn | TxOn);
1000 netdev_reset_queue(cp->dev);
1003 static void cp_enable_irq(struct cp_private *cp)
1005 cpw16_f(IntrMask, cp_intr_mask);
1008 static void cp_init_hw (struct cp_private *cp)
1010 struct net_device *dev = cp->dev;
1014 cpw8_f (Cfg9346, Cfg9346_Unlock);
1016 /* Restore our idea of the MAC address. */
1017 cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1018 cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1021 cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
1023 __cp_set_rx_mode(dev);
1024 cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift));
1026 cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable);
1027 /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */
1028 cpw8(Config3, PARMEnable);
1029 cp->wol_enabled = 0;
1031 cpw8(Config5, cpr8(Config5) & PMEStatus);
1033 cpw16(MultiIntr, 0);
1035 cpw8_f(Cfg9346, Cfg9346_Lock);
1038 static int cp_refill_rx(struct cp_private *cp)
1040 struct net_device *dev = cp->dev;
1043 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1044 struct sk_buff *skb;
1047 skb = netdev_alloc_skb_ip_align(dev, cp->rx_buf_sz);
1051 mapping = dma_map_single(&cp->pdev->dev, skb->data,
1052 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1053 cp->rx_skb[i] = skb;
1055 cp->rx_ring[i].opts2 = 0;
1056 cp->rx_ring[i].addr = cpu_to_le64(mapping);
1057 if (i == (CP_RX_RING_SIZE - 1))
1058 cp->rx_ring[i].opts1 =
1059 cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz);
1061 cp->rx_ring[i].opts1 =
1062 cpu_to_le32(DescOwn | cp->rx_buf_sz);
1072 static void cp_init_rings_index (struct cp_private *cp)
1075 cp->tx_head = cp->tx_tail = 0;
1078 static int cp_init_rings (struct cp_private *cp)
1080 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1081 cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
1083 cp_init_rings_index(cp);
1085 return cp_refill_rx (cp);
1088 static int cp_alloc_rings (struct cp_private *cp)
1092 mem = dma_alloc_coherent(&cp->pdev->dev, CP_RING_BYTES,
1093 &cp->ring_dma, GFP_KERNEL);
1098 cp->tx_ring = &cp->rx_ring[CP_RX_RING_SIZE];
1100 return cp_init_rings(cp);
1103 static void cp_clean_rings (struct cp_private *cp)
1105 struct cp_desc *desc;
1108 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1109 if (cp->rx_skb[i]) {
1110 desc = cp->rx_ring + i;
1111 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1112 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1113 dev_kfree_skb(cp->rx_skb[i]);
1117 for (i = 0; i < CP_TX_RING_SIZE; i++) {
1118 if (cp->tx_skb[i]) {
1119 struct sk_buff *skb = cp->tx_skb[i];
1121 desc = cp->tx_ring + i;
1122 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1123 le32_to_cpu(desc->opts1) & 0xffff,
1125 if (le32_to_cpu(desc->opts1) & LastFrag)
1127 cp->dev->stats.tx_dropped++;
1131 memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
1132 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1134 memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE);
1135 memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE);
1138 static void cp_free_rings (struct cp_private *cp)
1141 dma_free_coherent(&cp->pdev->dev, CP_RING_BYTES, cp->rx_ring,
1147 static int cp_open (struct net_device *dev)
1149 struct cp_private *cp = netdev_priv(dev);
1150 const int irq = cp->pdev->irq;
1153 netif_dbg(cp, ifup, dev, "enabling interface\n");
1155 rc = cp_alloc_rings(cp);
1159 napi_enable(&cp->napi);
1163 rc = request_irq(irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
1169 netif_carrier_off(dev);
1170 mii_check_media(&cp->mii_if, netif_msg_link(cp), true);
1171 netif_start_queue(dev);
1176 napi_disable(&cp->napi);
1182 static int cp_close (struct net_device *dev)
1184 struct cp_private *cp = netdev_priv(dev);
1185 unsigned long flags;
1187 napi_disable(&cp->napi);
1189 netif_dbg(cp, ifdown, dev, "disabling interface\n");
1191 spin_lock_irqsave(&cp->lock, flags);
1193 netif_stop_queue(dev);
1194 netif_carrier_off(dev);
1198 spin_unlock_irqrestore(&cp->lock, flags);
1200 free_irq(cp->pdev->irq, dev);
1206 static void cp_tx_timeout(struct net_device *dev)
1208 struct cp_private *cp = netdev_priv(dev);
1209 unsigned long flags;
1212 netdev_warn(dev, "Transmit timeout, status %2x %4x %4x %4x\n",
1213 cpr8(Cmd), cpr16(CpCmd),
1214 cpr16(IntrStatus), cpr16(IntrMask));
1216 spin_lock_irqsave(&cp->lock, flags);
1220 rc = cp_init_rings(cp);
1224 netif_wake_queue(dev);
1226 spin_unlock_irqrestore(&cp->lock, flags);
1229 static int cp_change_mtu(struct net_device *dev, int new_mtu)
1231 struct cp_private *cp = netdev_priv(dev);
1233 /* check for invalid MTU, according to hardware limits */
1234 if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU)
1237 /* if network interface not up, no need for complexity */
1238 if (!netif_running(dev)) {
1240 cp_set_rxbufsize(cp); /* set new rx buf size */
1244 /* network IS up, close it, reset MTU, and come up again. */
1247 cp_set_rxbufsize(cp);
1248 return cp_open(dev);
1251 static const char mii_2_8139_map[8] = {
1262 static int mdio_read(struct net_device *dev, int phy_id, int location)
1264 struct cp_private *cp = netdev_priv(dev);
1266 return location < 8 && mii_2_8139_map[location] ?
1267 readw(cp->regs + mii_2_8139_map[location]) : 0;
1271 static void mdio_write(struct net_device *dev, int phy_id, int location,
1274 struct cp_private *cp = netdev_priv(dev);
1276 if (location == 0) {
1277 cpw8(Cfg9346, Cfg9346_Unlock);
1278 cpw16(BasicModeCtrl, value);
1279 cpw8(Cfg9346, Cfg9346_Lock);
1280 } else if (location < 8 && mii_2_8139_map[location])
1281 cpw16(mii_2_8139_map[location], value);
1284 /* Set the ethtool Wake-on-LAN settings */
1285 static int netdev_set_wol (struct cp_private *cp,
1286 const struct ethtool_wolinfo *wol)
1290 options = cpr8 (Config3) & ~(LinkUp | MagicPacket);
1291 /* If WOL is being disabled, no need for complexity */
1293 if (wol->wolopts & WAKE_PHY) options |= LinkUp;
1294 if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket;
1297 cpw8 (Cfg9346, Cfg9346_Unlock);
1298 cpw8 (Config3, options);
1299 cpw8 (Cfg9346, Cfg9346_Lock);
1301 options = 0; /* Paranoia setting */
1302 options = cpr8 (Config5) & ~(UWF | MWF | BWF);
1303 /* If WOL is being disabled, no need for complexity */
1305 if (wol->wolopts & WAKE_UCAST) options |= UWF;
1306 if (wol->wolopts & WAKE_BCAST) options |= BWF;
1307 if (wol->wolopts & WAKE_MCAST) options |= MWF;
1310 cpw8 (Config5, options);
1312 cp->wol_enabled = (wol->wolopts) ? 1 : 0;
1317 /* Get the ethtool Wake-on-LAN settings */
1318 static void netdev_get_wol (struct cp_private *cp,
1319 struct ethtool_wolinfo *wol)
1323 wol->wolopts = 0; /* Start from scratch */
1324 wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC |
1325 WAKE_MCAST | WAKE_UCAST;
1326 /* We don't need to go on if WOL is disabled */
1327 if (!cp->wol_enabled) return;
1329 options = cpr8 (Config3);
1330 if (options & LinkUp) wol->wolopts |= WAKE_PHY;
1331 if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC;
1333 options = 0; /* Paranoia setting */
1334 options = cpr8 (Config5);
1335 if (options & UWF) wol->wolopts |= WAKE_UCAST;
1336 if (options & BWF) wol->wolopts |= WAKE_BCAST;
1337 if (options & MWF) wol->wolopts |= WAKE_MCAST;
1340 static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1342 struct cp_private *cp = netdev_priv(dev);
1344 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1345 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1346 strlcpy(info->bus_info, pci_name(cp->pdev), sizeof(info->bus_info));
1349 static void cp_get_ringparam(struct net_device *dev,
1350 struct ethtool_ringparam *ring)
1352 ring->rx_max_pending = CP_RX_RING_SIZE;
1353 ring->tx_max_pending = CP_TX_RING_SIZE;
1354 ring->rx_pending = CP_RX_RING_SIZE;
1355 ring->tx_pending = CP_TX_RING_SIZE;
1358 static int cp_get_regs_len(struct net_device *dev)
1360 return CP_REGS_SIZE;
1363 static int cp_get_sset_count (struct net_device *dev, int sset)
1367 return CP_NUM_STATS;
1373 static int cp_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1375 struct cp_private *cp = netdev_priv(dev);
1377 unsigned long flags;
1379 spin_lock_irqsave(&cp->lock, flags);
1380 rc = mii_ethtool_gset(&cp->mii_if, cmd);
1381 spin_unlock_irqrestore(&cp->lock, flags);
1386 static int cp_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1388 struct cp_private *cp = netdev_priv(dev);
1390 unsigned long flags;
1392 spin_lock_irqsave(&cp->lock, flags);
1393 rc = mii_ethtool_sset(&cp->mii_if, cmd);
1394 spin_unlock_irqrestore(&cp->lock, flags);
1399 static int cp_nway_reset(struct net_device *dev)
1401 struct cp_private *cp = netdev_priv(dev);
1402 return mii_nway_restart(&cp->mii_if);
1405 static u32 cp_get_msglevel(struct net_device *dev)
1407 struct cp_private *cp = netdev_priv(dev);
1408 return cp->msg_enable;
1411 static void cp_set_msglevel(struct net_device *dev, u32 value)
1413 struct cp_private *cp = netdev_priv(dev);
1414 cp->msg_enable = value;
1417 static int cp_set_features(struct net_device *dev, netdev_features_t features)
1419 struct cp_private *cp = netdev_priv(dev);
1420 unsigned long flags;
1422 if (!((dev->features ^ features) & NETIF_F_RXCSUM))
1425 spin_lock_irqsave(&cp->lock, flags);
1427 if (features & NETIF_F_RXCSUM)
1428 cp->cpcmd |= RxChkSum;
1430 cp->cpcmd &= ~RxChkSum;
1432 if (features & NETIF_F_HW_VLAN_RX)
1433 cp->cpcmd |= RxVlanOn;
1435 cp->cpcmd &= ~RxVlanOn;
1437 cpw16_f(CpCmd, cp->cpcmd);
1438 spin_unlock_irqrestore(&cp->lock, flags);
1443 static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1446 struct cp_private *cp = netdev_priv(dev);
1447 unsigned long flags;
1449 if (regs->len < CP_REGS_SIZE)
1450 return /* -EINVAL */;
1452 regs->version = CP_REGS_VER;
1454 spin_lock_irqsave(&cp->lock, flags);
1455 memcpy_fromio(p, cp->regs, CP_REGS_SIZE);
1456 spin_unlock_irqrestore(&cp->lock, flags);
1459 static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1461 struct cp_private *cp = netdev_priv(dev);
1462 unsigned long flags;
1464 spin_lock_irqsave (&cp->lock, flags);
1465 netdev_get_wol (cp, wol);
1466 spin_unlock_irqrestore (&cp->lock, flags);
1469 static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1471 struct cp_private *cp = netdev_priv(dev);
1472 unsigned long flags;
1475 spin_lock_irqsave (&cp->lock, flags);
1476 rc = netdev_set_wol (cp, wol);
1477 spin_unlock_irqrestore (&cp->lock, flags);
1482 static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf)
1484 switch (stringset) {
1486 memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
1494 static void cp_get_ethtool_stats (struct net_device *dev,
1495 struct ethtool_stats *estats, u64 *tmp_stats)
1497 struct cp_private *cp = netdev_priv(dev);
1498 struct cp_dma_stats *nic_stats;
1502 nic_stats = dma_alloc_coherent(&cp->pdev->dev, sizeof(*nic_stats),
1507 /* begin NIC statistics dump */
1508 cpw32(StatsAddr + 4, (u64)dma >> 32);
1509 cpw32(StatsAddr, ((u64)dma & DMA_BIT_MASK(32)) | DumpStats);
1512 for (i = 0; i < 1000; i++) {
1513 if ((cpr32(StatsAddr) & DumpStats) == 0)
1517 cpw32(StatsAddr, 0);
1518 cpw32(StatsAddr + 4, 0);
1522 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_ok);
1523 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok);
1524 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_err);
1525 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_err);
1526 tmp_stats[i++] = le16_to_cpu(nic_stats->rx_fifo);
1527 tmp_stats[i++] = le16_to_cpu(nic_stats->frame_align);
1528 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_1col);
1529 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_mcol);
1530 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_phys);
1531 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_bcast);
1532 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_ok_mcast);
1533 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_abort);
1534 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_underrun);
1535 tmp_stats[i++] = cp->cp_stats.rx_frags;
1536 BUG_ON(i != CP_NUM_STATS);
1538 dma_free_coherent(&cp->pdev->dev, sizeof(*nic_stats), nic_stats, dma);
1541 static const struct ethtool_ops cp_ethtool_ops = {
1542 .get_drvinfo = cp_get_drvinfo,
1543 .get_regs_len = cp_get_regs_len,
1544 .get_sset_count = cp_get_sset_count,
1545 .get_settings = cp_get_settings,
1546 .set_settings = cp_set_settings,
1547 .nway_reset = cp_nway_reset,
1548 .get_link = ethtool_op_get_link,
1549 .get_msglevel = cp_get_msglevel,
1550 .set_msglevel = cp_set_msglevel,
1551 .get_regs = cp_get_regs,
1552 .get_wol = cp_get_wol,
1553 .set_wol = cp_set_wol,
1554 .get_strings = cp_get_strings,
1555 .get_ethtool_stats = cp_get_ethtool_stats,
1556 .get_eeprom_len = cp_get_eeprom_len,
1557 .get_eeprom = cp_get_eeprom,
1558 .set_eeprom = cp_set_eeprom,
1559 .get_ringparam = cp_get_ringparam,
1562 static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1564 struct cp_private *cp = netdev_priv(dev);
1566 unsigned long flags;
1568 if (!netif_running(dev))
1571 spin_lock_irqsave(&cp->lock, flags);
1572 rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL);
1573 spin_unlock_irqrestore(&cp->lock, flags);
1577 static int cp_set_mac_address(struct net_device *dev, void *p)
1579 struct cp_private *cp = netdev_priv(dev);
1580 struct sockaddr *addr = p;
1582 if (!is_valid_ether_addr(addr->sa_data))
1583 return -EADDRNOTAVAIL;
1585 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1587 spin_lock_irq(&cp->lock);
1589 cpw8_f(Cfg9346, Cfg9346_Unlock);
1590 cpw32_f(MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1591 cpw32_f(MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1592 cpw8_f(Cfg9346, Cfg9346_Lock);
1594 spin_unlock_irq(&cp->lock);
1599 /* Serial EEPROM section. */
1601 /* EEPROM_Ctrl bits. */
1602 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1603 #define EE_CS 0x08 /* EEPROM chip select. */
1604 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1605 #define EE_WRITE_0 0x00
1606 #define EE_WRITE_1 0x02
1607 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1608 #define EE_ENB (0x80 | EE_CS)
1610 /* Delay between EEPROM clock transitions.
1611 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1614 #define eeprom_delay() readb(ee_addr)
1616 /* The EEPROM commands include the alway-set leading bit. */
1617 #define EE_EXTEND_CMD (4)
1618 #define EE_WRITE_CMD (5)
1619 #define EE_READ_CMD (6)
1620 #define EE_ERASE_CMD (7)
1622 #define EE_EWDS_ADDR (0)
1623 #define EE_WRAL_ADDR (1)
1624 #define EE_ERAL_ADDR (2)
1625 #define EE_EWEN_ADDR (3)
1627 #define CP_EEPROM_MAGIC PCI_DEVICE_ID_REALTEK_8139
1629 static void eeprom_cmd_start(void __iomem *ee_addr)
1631 writeb (EE_ENB & ~EE_CS, ee_addr);
1632 writeb (EE_ENB, ee_addr);
1636 static void eeprom_cmd(void __iomem *ee_addr, int cmd, int cmd_len)
1640 /* Shift the command bits out. */
1641 for (i = cmd_len - 1; i >= 0; i--) {
1642 int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1643 writeb (EE_ENB | dataval, ee_addr);
1645 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1648 writeb (EE_ENB, ee_addr);
1652 static void eeprom_cmd_end(void __iomem *ee_addr)
1658 static void eeprom_extend_cmd(void __iomem *ee_addr, int extend_cmd,
1661 int cmd = (EE_EXTEND_CMD << addr_len) | (extend_cmd << (addr_len - 2));
1663 eeprom_cmd_start(ee_addr);
1664 eeprom_cmd(ee_addr, cmd, 3 + addr_len);
1665 eeprom_cmd_end(ee_addr);
1668 static u16 read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1672 void __iomem *ee_addr = ioaddr + Cfg9346;
1673 int read_cmd = location | (EE_READ_CMD << addr_len);
1675 eeprom_cmd_start(ee_addr);
1676 eeprom_cmd(ee_addr, read_cmd, 3 + addr_len);
1678 for (i = 16; i > 0; i--) {
1679 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
1682 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
1684 writeb (EE_ENB, ee_addr);
1688 eeprom_cmd_end(ee_addr);
1693 static void write_eeprom(void __iomem *ioaddr, int location, u16 val,
1697 void __iomem *ee_addr = ioaddr + Cfg9346;
1698 int write_cmd = location | (EE_WRITE_CMD << addr_len);
1700 eeprom_extend_cmd(ee_addr, EE_EWEN_ADDR, addr_len);
1702 eeprom_cmd_start(ee_addr);
1703 eeprom_cmd(ee_addr, write_cmd, 3 + addr_len);
1704 eeprom_cmd(ee_addr, val, 16);
1705 eeprom_cmd_end(ee_addr);
1707 eeprom_cmd_start(ee_addr);
1708 for (i = 0; i < 20000; i++)
1709 if (readb(ee_addr) & EE_DATA_READ)
1711 eeprom_cmd_end(ee_addr);
1713 eeprom_extend_cmd(ee_addr, EE_EWDS_ADDR, addr_len);
1716 static int cp_get_eeprom_len(struct net_device *dev)
1718 struct cp_private *cp = netdev_priv(dev);
1721 spin_lock_irq(&cp->lock);
1722 size = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 256 : 128;
1723 spin_unlock_irq(&cp->lock);
1728 static int cp_get_eeprom(struct net_device *dev,
1729 struct ethtool_eeprom *eeprom, u8 *data)
1731 struct cp_private *cp = netdev_priv(dev);
1732 unsigned int addr_len;
1734 u32 offset = eeprom->offset >> 1;
1735 u32 len = eeprom->len;
1738 eeprom->magic = CP_EEPROM_MAGIC;
1740 spin_lock_irq(&cp->lock);
1742 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1744 if (eeprom->offset & 1) {
1745 val = read_eeprom(cp->regs, offset, addr_len);
1746 data[i++] = (u8)(val >> 8);
1750 while (i < len - 1) {
1751 val = read_eeprom(cp->regs, offset, addr_len);
1752 data[i++] = (u8)val;
1753 data[i++] = (u8)(val >> 8);
1758 val = read_eeprom(cp->regs, offset, addr_len);
1762 spin_unlock_irq(&cp->lock);
1766 static int cp_set_eeprom(struct net_device *dev,
1767 struct ethtool_eeprom *eeprom, u8 *data)
1769 struct cp_private *cp = netdev_priv(dev);
1770 unsigned int addr_len;
1772 u32 offset = eeprom->offset >> 1;
1773 u32 len = eeprom->len;
1776 if (eeprom->magic != CP_EEPROM_MAGIC)
1779 spin_lock_irq(&cp->lock);
1781 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1783 if (eeprom->offset & 1) {
1784 val = read_eeprom(cp->regs, offset, addr_len) & 0xff;
1785 val |= (u16)data[i++] << 8;
1786 write_eeprom(cp->regs, offset, val, addr_len);
1790 while (i < len - 1) {
1791 val = (u16)data[i++];
1792 val |= (u16)data[i++] << 8;
1793 write_eeprom(cp->regs, offset, val, addr_len);
1798 val = read_eeprom(cp->regs, offset, addr_len) & 0xff00;
1799 val |= (u16)data[i];
1800 write_eeprom(cp->regs, offset, val, addr_len);
1803 spin_unlock_irq(&cp->lock);
1807 /* Put the board into D3cold state and wait for WakeUp signal */
1808 static void cp_set_d3_state (struct cp_private *cp)
1810 pci_enable_wake (cp->pdev, 0, 1); /* Enable PME# generation */
1811 pci_set_power_state (cp->pdev, PCI_D3hot);
1814 static const struct net_device_ops cp_netdev_ops = {
1815 .ndo_open = cp_open,
1816 .ndo_stop = cp_close,
1817 .ndo_validate_addr = eth_validate_addr,
1818 .ndo_set_mac_address = cp_set_mac_address,
1819 .ndo_set_rx_mode = cp_set_rx_mode,
1820 .ndo_get_stats = cp_get_stats,
1821 .ndo_do_ioctl = cp_ioctl,
1822 .ndo_start_xmit = cp_start_xmit,
1823 .ndo_tx_timeout = cp_tx_timeout,
1824 .ndo_set_features = cp_set_features,
1825 .ndo_change_mtu = cp_change_mtu,
1827 #ifdef CONFIG_NET_POLL_CONTROLLER
1828 .ndo_poll_controller = cp_poll_controller,
1832 static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1834 struct net_device *dev;
1835 struct cp_private *cp;
1838 resource_size_t pciaddr;
1839 unsigned int addr_len, i, pci_using_dac;
1842 static int version_printed;
1843 if (version_printed++ == 0)
1844 pr_info("%s", version);
1847 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
1848 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision < 0x20) {
1849 dev_info(&pdev->dev,
1850 "This (id %04x:%04x rev %02x) is not an 8139C+ compatible chip, use 8139too\n",
1851 pdev->vendor, pdev->device, pdev->revision);
1855 dev = alloc_etherdev(sizeof(struct cp_private));
1858 SET_NETDEV_DEV(dev, &pdev->dev);
1860 cp = netdev_priv(dev);
1863 cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug);
1864 spin_lock_init (&cp->lock);
1865 cp->mii_if.dev = dev;
1866 cp->mii_if.mdio_read = mdio_read;
1867 cp->mii_if.mdio_write = mdio_write;
1868 cp->mii_if.phy_id = CP_INTERNAL_PHY;
1869 cp->mii_if.phy_id_mask = 0x1f;
1870 cp->mii_if.reg_num_mask = 0x1f;
1871 cp_set_rxbufsize(cp);
1873 rc = pci_enable_device(pdev);
1877 rc = pci_set_mwi(pdev);
1879 goto err_out_disable;
1881 rc = pci_request_regions(pdev, DRV_NAME);
1885 pciaddr = pci_resource_start(pdev, 1);
1888 dev_err(&pdev->dev, "no MMIO resource\n");
1891 if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) {
1893 dev_err(&pdev->dev, "MMIO resource (%llx) too small\n",
1894 (unsigned long long)pci_resource_len(pdev, 1));
1898 /* Configure DMA attributes. */
1899 if ((sizeof(dma_addr_t) > 4) &&
1900 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) &&
1901 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
1906 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1909 "No usable DMA configuration, aborting\n");
1912 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1915 "No usable consistent DMA configuration, aborting\n");
1920 cp->cpcmd = (pci_using_dac ? PCIDAC : 0) |
1921 PCIMulRW | RxChkSum | CpRxOn | CpTxOn;
1923 dev->features |= NETIF_F_RXCSUM;
1924 dev->hw_features |= NETIF_F_RXCSUM;
1926 regs = ioremap(pciaddr, CP_REGS_SIZE);
1929 dev_err(&pdev->dev, "Cannot map PCI MMIO (%Lx@%Lx)\n",
1930 (unsigned long long)pci_resource_len(pdev, 1),
1931 (unsigned long long)pciaddr);
1938 /* read MAC address from EEPROM */
1939 addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6;
1940 for (i = 0; i < 3; i++)
1941 ((__le16 *) (dev->dev_addr))[i] =
1942 cpu_to_le16(read_eeprom (regs, i + 7, addr_len));
1943 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1945 dev->netdev_ops = &cp_netdev_ops;
1946 netif_napi_add(dev, &cp->napi, cp_rx_poll, 16);
1947 dev->ethtool_ops = &cp_ethtool_ops;
1948 dev->watchdog_timeo = TX_TIMEOUT;
1950 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1953 dev->features |= NETIF_F_HIGHDMA;
1955 /* disabled by default until verified */
1956 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1957 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1958 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1961 rc = register_netdev(dev);
1965 netdev_info(dev, "RTL-8139C+ at 0x%p, %pM, IRQ %d\n",
1966 regs, dev->dev_addr, pdev->irq);
1968 pci_set_drvdata(pdev, dev);
1970 /* enable busmastering and memory-write-invalidate */
1971 pci_set_master(pdev);
1973 if (cp->wol_enabled)
1974 cp_set_d3_state (cp);
1981 pci_release_regions(pdev);
1983 pci_clear_mwi(pdev);
1985 pci_disable_device(pdev);
1991 static void cp_remove_one (struct pci_dev *pdev)
1993 struct net_device *dev = pci_get_drvdata(pdev);
1994 struct cp_private *cp = netdev_priv(dev);
1996 unregister_netdev(dev);
1998 if (cp->wol_enabled)
1999 pci_set_power_state (pdev, PCI_D0);
2000 pci_release_regions(pdev);
2001 pci_clear_mwi(pdev);
2002 pci_disable_device(pdev);
2003 pci_set_drvdata(pdev, NULL);
2008 static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
2010 struct net_device *dev = pci_get_drvdata(pdev);
2011 struct cp_private *cp = netdev_priv(dev);
2012 unsigned long flags;
2014 if (!netif_running(dev))
2017 netif_device_detach (dev);
2018 netif_stop_queue (dev);
2020 spin_lock_irqsave (&cp->lock, flags);
2022 /* Disable Rx and Tx */
2023 cpw16 (IntrMask, 0);
2024 cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn));
2026 spin_unlock_irqrestore (&cp->lock, flags);
2028 pci_save_state(pdev);
2029 pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
2030 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2035 static int cp_resume (struct pci_dev *pdev)
2037 struct net_device *dev = pci_get_drvdata (pdev);
2038 struct cp_private *cp = netdev_priv(dev);
2039 unsigned long flags;
2041 if (!netif_running(dev))
2044 netif_device_attach (dev);
2046 pci_set_power_state(pdev, PCI_D0);
2047 pci_restore_state(pdev);
2048 pci_enable_wake(pdev, PCI_D0, 0);
2050 /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
2051 cp_init_rings_index (cp);
2054 netif_start_queue (dev);
2056 spin_lock_irqsave (&cp->lock, flags);
2058 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
2060 spin_unlock_irqrestore (&cp->lock, flags);
2064 #endif /* CONFIG_PM */
2066 static struct pci_driver cp_driver = {
2068 .id_table = cp_pci_tbl,
2069 .probe = cp_init_one,
2070 .remove = cp_remove_one,
2072 .resume = cp_resume,
2073 .suspend = cp_suspend,
2077 static int __init cp_init (void)
2080 pr_info("%s", version);
2082 return pci_register_driver(&cp_driver);
2085 static void __exit cp_exit (void)
2087 pci_unregister_driver (&cp_driver);
2090 module_init(cp_init);
2091 module_exit(cp_exit);