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Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/linville/wirel...
[deliverable/linux.git] / drivers / net / 8139cp.c
1 /* 8139cp.c: A Linux PCI Ethernet driver for the RealTek 8139C+ chips. */
2 /*
3 Copyright 2001-2004 Jeff Garzik <jgarzik@pobox.com>
4
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]
11
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.
18
19 See the file COPYING in this distribution for more information.
20
21 Contributors:
22
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>
26
27 TODO:
28 * Test Tx checksumming thoroughly
29 * Implement dev->tx_timeout
30
31 Low priority TODO:
32 * Complete reset on PciErr
33 * Consider Rx interrupt mitigation using TimerIntr
34 * Investigate using skb->priority with h/w VLAN priority
35 * Investigate using High Priority Tx Queue with skb->priority
36 * Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error
37 * Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error
38 * Implement Tx software interrupt mitigation via
39 Tx descriptor bit
40 * The real minimum of CP_MIN_MTU is 4 bytes. However,
41 for this to be supported, one must(?) turn on packet padding.
42 * Support external MII transceivers (patch available)
43
44 NOTES:
45 * TX checksumming is considered experimental. It is off by
46 default, use ethtool to turn it on.
47
48 */
49
50 #define DRV_NAME "8139cp"
51 #define DRV_VERSION "1.3"
52 #define DRV_RELDATE "Mar 22, 2004"
53
54
55 #include <linux/module.h>
56 #include <linux/moduleparam.h>
57 #include <linux/kernel.h>
58 #include <linux/compiler.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/dma-mapping.h>
64 #include <linux/delay.h>
65 #include <linux/ethtool.h>
66 #include <linux/mii.h>
67 #include <linux/if_vlan.h>
68 #include <linux/crc32.h>
69 #include <linux/in.h>
70 #include <linux/ip.h>
71 #include <linux/tcp.h>
72 #include <linux/udp.h>
73 #include <linux/cache.h>
74 #include <asm/io.h>
75 #include <asm/irq.h>
76 #include <asm/uaccess.h>
77
78 /* VLAN tagging feature enable/disable */
79 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
80 #define CP_VLAN_TAG_USED 1
81 #define CP_VLAN_TX_TAG(tx_desc,vlan_tag_value) \
82 do { (tx_desc)->opts2 = (vlan_tag_value); } while (0)
83 #else
84 #define CP_VLAN_TAG_USED 0
85 #define CP_VLAN_TX_TAG(tx_desc,vlan_tag_value) \
86 do { (tx_desc)->opts2 = 0; } while (0)
87 #endif
88
89 /* These identify the driver base version and may not be removed. */
90 static char version[] =
91 KERN_INFO DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE ")\n";
92
93 MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
94 MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver");
95 MODULE_VERSION(DRV_VERSION);
96 MODULE_LICENSE("GPL");
97
98 static int debug = -1;
99 module_param(debug, int, 0);
100 MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
101
102 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
103 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
104 static int multicast_filter_limit = 32;
105 module_param(multicast_filter_limit, int, 0);
106 MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses");
107
108 #define PFX DRV_NAME ": "
109
110 #ifndef TRUE
111 #define FALSE 0
112 #define TRUE (!FALSE)
113 #endif
114
115 #define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
116 NETIF_MSG_PROBE | \
117 NETIF_MSG_LINK)
118 #define CP_NUM_STATS 14 /* struct cp_dma_stats, plus one */
119 #define CP_STATS_SIZE 64 /* size in bytes of DMA stats block */
120 #define CP_REGS_SIZE (0xff + 1)
121 #define CP_REGS_VER 1 /* version 1 */
122 #define CP_RX_RING_SIZE 64
123 #define CP_TX_RING_SIZE 64
124 #define CP_RING_BYTES \
125 ((sizeof(struct cp_desc) * CP_RX_RING_SIZE) + \
126 (sizeof(struct cp_desc) * CP_TX_RING_SIZE) + \
127 CP_STATS_SIZE)
128 #define NEXT_TX(N) (((N) + 1) & (CP_TX_RING_SIZE - 1))
129 #define NEXT_RX(N) (((N) + 1) & (CP_RX_RING_SIZE - 1))
130 #define TX_BUFFS_AVAIL(CP) \
131 (((CP)->tx_tail <= (CP)->tx_head) ? \
132 (CP)->tx_tail + (CP_TX_RING_SIZE - 1) - (CP)->tx_head : \
133 (CP)->tx_tail - (CP)->tx_head - 1)
134
135 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
136 #define RX_OFFSET 2
137 #define CP_INTERNAL_PHY 32
138
139 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
140 #define RX_FIFO_THRESH 5 /* Rx buffer level before first PCI xfer. */
141 #define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 */
142 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
143 #define TX_EARLY_THRESH 256 /* Early Tx threshold, in bytes */
144
145 /* Time in jiffies before concluding the transmitter is hung. */
146 #define TX_TIMEOUT (6*HZ)
147
148 /* hardware minimum and maximum for a single frame's data payload */
149 #define CP_MIN_MTU 60 /* TODO: allow lower, but pad */
150 #define CP_MAX_MTU 4096
151
152 enum {
153 /* NIC register offsets */
154 MAC0 = 0x00, /* Ethernet hardware address. */
155 MAR0 = 0x08, /* Multicast filter. */
156 StatsAddr = 0x10, /* 64-bit start addr of 64-byte DMA stats blk */
157 TxRingAddr = 0x20, /* 64-bit start addr of Tx ring */
158 HiTxRingAddr = 0x28, /* 64-bit start addr of high priority Tx ring */
159 Cmd = 0x37, /* Command register */
160 IntrMask = 0x3C, /* Interrupt mask */
161 IntrStatus = 0x3E, /* Interrupt status */
162 TxConfig = 0x40, /* Tx configuration */
163 ChipVersion = 0x43, /* 8-bit chip version, inside TxConfig */
164 RxConfig = 0x44, /* Rx configuration */
165 RxMissed = 0x4C, /* 24 bits valid, write clears */
166 Cfg9346 = 0x50, /* EEPROM select/control; Cfg reg [un]lock */
167 Config1 = 0x52, /* Config1 */
168 Config3 = 0x59, /* Config3 */
169 Config4 = 0x5A, /* Config4 */
170 MultiIntr = 0x5C, /* Multiple interrupt select */
171 BasicModeCtrl = 0x62, /* MII BMCR */
172 BasicModeStatus = 0x64, /* MII BMSR */
173 NWayAdvert = 0x66, /* MII ADVERTISE */
174 NWayLPAR = 0x68, /* MII LPA */
175 NWayExpansion = 0x6A, /* MII Expansion */
176 Config5 = 0xD8, /* Config5 */
177 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
178 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
179 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
180 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
181 RxRingAddr = 0xE4, /* 64-bit start addr of Rx ring */
182 TxThresh = 0xEC, /* Early Tx threshold */
183 OldRxBufAddr = 0x30, /* DMA address of Rx ring buffer (C mode) */
184 OldTSD0 = 0x10, /* DMA address of first Tx desc (C mode) */
185
186 /* Tx and Rx status descriptors */
187 DescOwn = (1 << 31), /* Descriptor is owned by NIC */
188 RingEnd = (1 << 30), /* End of descriptor ring */
189 FirstFrag = (1 << 29), /* First segment of a packet */
190 LastFrag = (1 << 28), /* Final segment of a packet */
191 LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */
192 MSSShift = 16, /* MSS value position */
193 MSSMask = 0xfff, /* MSS value: 11 bits */
194 TxError = (1 << 23), /* Tx error summary */
195 RxError = (1 << 20), /* Rx error summary */
196 IPCS = (1 << 18), /* Calculate IP checksum */
197 UDPCS = (1 << 17), /* Calculate UDP/IP checksum */
198 TCPCS = (1 << 16), /* Calculate TCP/IP checksum */
199 TxVlanTag = (1 << 17), /* Add VLAN tag */
200 RxVlanTagged = (1 << 16), /* Rx VLAN tag available */
201 IPFail = (1 << 15), /* IP checksum failed */
202 UDPFail = (1 << 14), /* UDP/IP checksum failed */
203 TCPFail = (1 << 13), /* TCP/IP checksum failed */
204 NormalTxPoll = (1 << 6), /* One or more normal Tx packets to send */
205 PID1 = (1 << 17), /* 2 protocol id bits: 0==non-IP, */
206 PID0 = (1 << 16), /* 1==UDP/IP, 2==TCP/IP, 3==IP */
207 RxProtoTCP = 1,
208 RxProtoUDP = 2,
209 RxProtoIP = 3,
210 TxFIFOUnder = (1 << 25), /* Tx FIFO underrun */
211 TxOWC = (1 << 22), /* Tx Out-of-window collision */
212 TxLinkFail = (1 << 21), /* Link failed during Tx of packet */
213 TxMaxCol = (1 << 20), /* Tx aborted due to excessive collisions */
214 TxColCntShift = 16, /* Shift, to get 4-bit Tx collision cnt */
215 TxColCntMask = 0x01 | 0x02 | 0x04 | 0x08, /* 4-bit collision count */
216 RxErrFrame = (1 << 27), /* Rx frame alignment error */
217 RxMcast = (1 << 26), /* Rx multicast packet rcv'd */
218 RxErrCRC = (1 << 18), /* Rx CRC error */
219 RxErrRunt = (1 << 19), /* Rx error, packet < 64 bytes */
220 RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */
221 RxErrFIFO = (1 << 22), /* Rx error, FIFO overflowed, pkt bad */
222
223 /* StatsAddr register */
224 DumpStats = (1 << 3), /* Begin stats dump */
225
226 /* RxConfig register */
227 RxCfgFIFOShift = 13, /* Shift, to get Rx FIFO thresh value */
228 RxCfgDMAShift = 8, /* Shift, to get Rx Max DMA value */
229 AcceptErr = 0x20, /* Accept packets with CRC errors */
230 AcceptRunt = 0x10, /* Accept runt (<64 bytes) packets */
231 AcceptBroadcast = 0x08, /* Accept broadcast packets */
232 AcceptMulticast = 0x04, /* Accept multicast packets */
233 AcceptMyPhys = 0x02, /* Accept pkts with our MAC as dest */
234 AcceptAllPhys = 0x01, /* Accept all pkts w/ physical dest */
235
236 /* IntrMask / IntrStatus registers */
237 PciErr = (1 << 15), /* System error on the PCI bus */
238 TimerIntr = (1 << 14), /* Asserted when TCTR reaches TimerInt value */
239 LenChg = (1 << 13), /* Cable length change */
240 SWInt = (1 << 8), /* Software-requested interrupt */
241 TxEmpty = (1 << 7), /* No Tx descriptors available */
242 RxFIFOOvr = (1 << 6), /* Rx FIFO Overflow */
243 LinkChg = (1 << 5), /* Packet underrun, or link change */
244 RxEmpty = (1 << 4), /* No Rx descriptors available */
245 TxErr = (1 << 3), /* Tx error */
246 TxOK = (1 << 2), /* Tx packet sent */
247 RxErr = (1 << 1), /* Rx error */
248 RxOK = (1 << 0), /* Rx packet received */
249 IntrResvd = (1 << 10), /* reserved, according to RealTek engineers,
250 but hardware likes to raise it */
251
252 IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty |
253 RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK |
254 RxErr | RxOK | IntrResvd,
255
256 /* C mode command register */
257 CmdReset = (1 << 4), /* Enable to reset; self-clearing */
258 RxOn = (1 << 3), /* Rx mode enable */
259 TxOn = (1 << 2), /* Tx mode enable */
260
261 /* C+ mode command register */
262 RxVlanOn = (1 << 6), /* Rx VLAN de-tagging enable */
263 RxChkSum = (1 << 5), /* Rx checksum offload enable */
264 PCIDAC = (1 << 4), /* PCI Dual Address Cycle (64-bit PCI) */
265 PCIMulRW = (1 << 3), /* Enable PCI read/write multiple */
266 CpRxOn = (1 << 1), /* Rx mode enable */
267 CpTxOn = (1 << 0), /* Tx mode enable */
268
269 /* Cfg9436 EEPROM control register */
270 Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */
271 Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */
272
273 /* TxConfig register */
274 IFG = (1 << 25) | (1 << 24), /* standard IEEE interframe gap */
275 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
276
277 /* Early Tx Threshold register */
278 TxThreshMask = 0x3f, /* Mask bits 5-0 */
279 TxThreshMax = 2048, /* Max early Tx threshold */
280
281 /* Config1 register */
282 DriverLoaded = (1 << 5), /* Software marker, driver is loaded */
283 LWACT = (1 << 4), /* LWAKE active mode */
284 PMEnable = (1 << 0), /* Enable various PM features of chip */
285
286 /* Config3 register */
287 PARMEnable = (1 << 6), /* Enable auto-loading of PHY parms */
288 MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */
289 LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */
290
291 /* Config4 register */
292 LWPTN = (1 << 1), /* LWAKE Pattern */
293 LWPME = (1 << 4), /* LANWAKE vs PMEB */
294
295 /* Config5 register */
296 BWF = (1 << 6), /* Accept Broadcast wakeup frame */
297 MWF = (1 << 5), /* Accept Multicast wakeup frame */
298 UWF = (1 << 4), /* Accept Unicast wakeup frame */
299 LANWake = (1 << 1), /* Enable LANWake signal */
300 PMEStatus = (1 << 0), /* PME status can be reset by PCI RST# */
301
302 cp_norx_intr_mask = PciErr | LinkChg | TxOK | TxErr | TxEmpty,
303 cp_rx_intr_mask = RxOK | RxErr | RxEmpty | RxFIFOOvr,
304 cp_intr_mask = cp_rx_intr_mask | cp_norx_intr_mask,
305 };
306
307 static const unsigned int cp_rx_config =
308 (RX_FIFO_THRESH << RxCfgFIFOShift) |
309 (RX_DMA_BURST << RxCfgDMAShift);
310
311 struct cp_desc {
312 u32 opts1;
313 u32 opts2;
314 u64 addr;
315 };
316
317 struct cp_dma_stats {
318 u64 tx_ok;
319 u64 rx_ok;
320 u64 tx_err;
321 u32 rx_err;
322 u16 rx_fifo;
323 u16 frame_align;
324 u32 tx_ok_1col;
325 u32 tx_ok_mcol;
326 u64 rx_ok_phys;
327 u64 rx_ok_bcast;
328 u32 rx_ok_mcast;
329 u16 tx_abort;
330 u16 tx_underrun;
331 } __attribute__((packed));
332
333 struct cp_extra_stats {
334 unsigned long rx_frags;
335 };
336
337 struct cp_private {
338 void __iomem *regs;
339 struct net_device *dev;
340 spinlock_t lock;
341 u32 msg_enable;
342
343 struct pci_dev *pdev;
344 u32 rx_config;
345 u16 cpcmd;
346
347 struct net_device_stats net_stats;
348 struct cp_extra_stats cp_stats;
349
350 unsigned rx_head ____cacheline_aligned;
351 unsigned rx_tail;
352 struct cp_desc *rx_ring;
353 struct sk_buff *rx_skb[CP_RX_RING_SIZE];
354
355 unsigned tx_head ____cacheline_aligned;
356 unsigned tx_tail;
357 struct cp_desc *tx_ring;
358 struct sk_buff *tx_skb[CP_TX_RING_SIZE];
359
360 unsigned rx_buf_sz;
361 unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */
362
363 #if CP_VLAN_TAG_USED
364 struct vlan_group *vlgrp;
365 #endif
366 dma_addr_t ring_dma;
367
368 struct mii_if_info mii_if;
369 };
370
371 #define cpr8(reg) readb(cp->regs + (reg))
372 #define cpr16(reg) readw(cp->regs + (reg))
373 #define cpr32(reg) readl(cp->regs + (reg))
374 #define cpw8(reg,val) writeb((val), cp->regs + (reg))
375 #define cpw16(reg,val) writew((val), cp->regs + (reg))
376 #define cpw32(reg,val) writel((val), cp->regs + (reg))
377 #define cpw8_f(reg,val) do { \
378 writeb((val), cp->regs + (reg)); \
379 readb(cp->regs + (reg)); \
380 } while (0)
381 #define cpw16_f(reg,val) do { \
382 writew((val), cp->regs + (reg)); \
383 readw(cp->regs + (reg)); \
384 } while (0)
385 #define cpw32_f(reg,val) do { \
386 writel((val), cp->regs + (reg)); \
387 readl(cp->regs + (reg)); \
388 } while (0)
389
390
391 static void __cp_set_rx_mode (struct net_device *dev);
392 static void cp_tx (struct cp_private *cp);
393 static void cp_clean_rings (struct cp_private *cp);
394 #ifdef CONFIG_NET_POLL_CONTROLLER
395 static void cp_poll_controller(struct net_device *dev);
396 #endif
397 static int cp_get_eeprom_len(struct net_device *dev);
398 static int cp_get_eeprom(struct net_device *dev,
399 struct ethtool_eeprom *eeprom, u8 *data);
400 static int cp_set_eeprom(struct net_device *dev,
401 struct ethtool_eeprom *eeprom, u8 *data);
402
403 static struct pci_device_id cp_pci_tbl[] = {
404 { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
405 { PCI_DEVICE(PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322), },
406 { },
407 };
408 MODULE_DEVICE_TABLE(pci, cp_pci_tbl);
409
410 static struct {
411 const char str[ETH_GSTRING_LEN];
412 } ethtool_stats_keys[] = {
413 { "tx_ok" },
414 { "rx_ok" },
415 { "tx_err" },
416 { "rx_err" },
417 { "rx_fifo" },
418 { "frame_align" },
419 { "tx_ok_1col" },
420 { "tx_ok_mcol" },
421 { "rx_ok_phys" },
422 { "rx_ok_bcast" },
423 { "rx_ok_mcast" },
424 { "tx_abort" },
425 { "tx_underrun" },
426 { "rx_frags" },
427 };
428
429
430 #if CP_VLAN_TAG_USED
431 static void cp_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
432 {
433 struct cp_private *cp = netdev_priv(dev);
434 unsigned long flags;
435
436 spin_lock_irqsave(&cp->lock, flags);
437 cp->vlgrp = grp;
438 cp->cpcmd |= RxVlanOn;
439 cpw16(CpCmd, cp->cpcmd);
440 spin_unlock_irqrestore(&cp->lock, flags);
441 }
442
443 static void cp_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
444 {
445 struct cp_private *cp = netdev_priv(dev);
446 unsigned long flags;
447
448 spin_lock_irqsave(&cp->lock, flags);
449 cp->cpcmd &= ~RxVlanOn;
450 cpw16(CpCmd, cp->cpcmd);
451 if (cp->vlgrp)
452 cp->vlgrp->vlan_devices[vid] = NULL;
453 spin_unlock_irqrestore(&cp->lock, flags);
454 }
455 #endif /* CP_VLAN_TAG_USED */
456
457 static inline void cp_set_rxbufsize (struct cp_private *cp)
458 {
459 unsigned int mtu = cp->dev->mtu;
460
461 if (mtu > ETH_DATA_LEN)
462 /* MTU + ethernet header + FCS + optional VLAN tag */
463 cp->rx_buf_sz = mtu + ETH_HLEN + 8;
464 else
465 cp->rx_buf_sz = PKT_BUF_SZ;
466 }
467
468 static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb,
469 struct cp_desc *desc)
470 {
471 skb->protocol = eth_type_trans (skb, cp->dev);
472
473 cp->net_stats.rx_packets++;
474 cp->net_stats.rx_bytes += skb->len;
475 cp->dev->last_rx = jiffies;
476
477 #if CP_VLAN_TAG_USED
478 if (cp->vlgrp && (desc->opts2 & RxVlanTagged)) {
479 vlan_hwaccel_receive_skb(skb, cp->vlgrp,
480 be16_to_cpu(desc->opts2 & 0xffff));
481 } else
482 #endif
483 netif_receive_skb(skb);
484 }
485
486 static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail,
487 u32 status, u32 len)
488 {
489 if (netif_msg_rx_err (cp))
490 printk (KERN_DEBUG
491 "%s: rx err, slot %d status 0x%x len %d\n",
492 cp->dev->name, rx_tail, status, len);
493 cp->net_stats.rx_errors++;
494 if (status & RxErrFrame)
495 cp->net_stats.rx_frame_errors++;
496 if (status & RxErrCRC)
497 cp->net_stats.rx_crc_errors++;
498 if ((status & RxErrRunt) || (status & RxErrLong))
499 cp->net_stats.rx_length_errors++;
500 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag))
501 cp->net_stats.rx_length_errors++;
502 if (status & RxErrFIFO)
503 cp->net_stats.rx_fifo_errors++;
504 }
505
506 static inline unsigned int cp_rx_csum_ok (u32 status)
507 {
508 unsigned int protocol = (status >> 16) & 0x3;
509
510 if (likely((protocol == RxProtoTCP) && (!(status & TCPFail))))
511 return 1;
512 else if ((protocol == RxProtoUDP) && (!(status & UDPFail)))
513 return 1;
514 else if ((protocol == RxProtoIP) && (!(status & IPFail)))
515 return 1;
516 return 0;
517 }
518
519 static int cp_rx_poll (struct net_device *dev, int *budget)
520 {
521 struct cp_private *cp = netdev_priv(dev);
522 unsigned rx_tail = cp->rx_tail;
523 unsigned rx_work = dev->quota;
524 unsigned rx;
525
526 rx_status_loop:
527 rx = 0;
528 cpw16(IntrStatus, cp_rx_intr_mask);
529
530 while (1) {
531 u32 status, len;
532 dma_addr_t mapping;
533 struct sk_buff *skb, *new_skb;
534 struct cp_desc *desc;
535 unsigned buflen;
536
537 skb = cp->rx_skb[rx_tail];
538 BUG_ON(!skb);
539
540 desc = &cp->rx_ring[rx_tail];
541 status = le32_to_cpu(desc->opts1);
542 if (status & DescOwn)
543 break;
544
545 len = (status & 0x1fff) - 4;
546 mapping = le64_to_cpu(desc->addr);
547
548 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) {
549 /* we don't support incoming fragmented frames.
550 * instead, we attempt to ensure that the
551 * pre-allocated RX skbs are properly sized such
552 * that RX fragments are never encountered
553 */
554 cp_rx_err_acct(cp, rx_tail, status, len);
555 cp->net_stats.rx_dropped++;
556 cp->cp_stats.rx_frags++;
557 goto rx_next;
558 }
559
560 if (status & (RxError | RxErrFIFO)) {
561 cp_rx_err_acct(cp, rx_tail, status, len);
562 goto rx_next;
563 }
564
565 if (netif_msg_rx_status(cp))
566 printk(KERN_DEBUG "%s: rx slot %d status 0x%x len %d\n",
567 dev->name, rx_tail, status, len);
568
569 buflen = cp->rx_buf_sz + RX_OFFSET;
570 new_skb = dev_alloc_skb (buflen);
571 if (!new_skb) {
572 cp->net_stats.rx_dropped++;
573 goto rx_next;
574 }
575
576 skb_reserve(new_skb, RX_OFFSET);
577 new_skb->dev = dev;
578
579 pci_unmap_single(cp->pdev, mapping,
580 buflen, PCI_DMA_FROMDEVICE);
581
582 /* Handle checksum offloading for incoming packets. */
583 if (cp_rx_csum_ok(status))
584 skb->ip_summed = CHECKSUM_UNNECESSARY;
585 else
586 skb->ip_summed = CHECKSUM_NONE;
587
588 skb_put(skb, len);
589
590 mapping = pci_map_single(cp->pdev, new_skb->data, buflen,
591 PCI_DMA_FROMDEVICE);
592 cp->rx_skb[rx_tail] = new_skb;
593
594 cp_rx_skb(cp, skb, desc);
595 rx++;
596
597 rx_next:
598 cp->rx_ring[rx_tail].opts2 = 0;
599 cp->rx_ring[rx_tail].addr = cpu_to_le64(mapping);
600 if (rx_tail == (CP_RX_RING_SIZE - 1))
601 desc->opts1 = cpu_to_le32(DescOwn | RingEnd |
602 cp->rx_buf_sz);
603 else
604 desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
605 rx_tail = NEXT_RX(rx_tail);
606
607 if (!rx_work--)
608 break;
609 }
610
611 cp->rx_tail = rx_tail;
612
613 dev->quota -= rx;
614 *budget -= rx;
615
616 /* if we did not reach work limit, then we're done with
617 * this round of polling
618 */
619 if (rx_work) {
620 unsigned long flags;
621
622 if (cpr16(IntrStatus) & cp_rx_intr_mask)
623 goto rx_status_loop;
624
625 local_irq_save(flags);
626 cpw16_f(IntrMask, cp_intr_mask);
627 __netif_rx_complete(dev);
628 local_irq_restore(flags);
629
630 return 0; /* done */
631 }
632
633 return 1; /* not done */
634 }
635
636 static irqreturn_t cp_interrupt (int irq, void *dev_instance)
637 {
638 struct net_device *dev = dev_instance;
639 struct cp_private *cp;
640 u16 status;
641
642 if (unlikely(dev == NULL))
643 return IRQ_NONE;
644 cp = netdev_priv(dev);
645
646 status = cpr16(IntrStatus);
647 if (!status || (status == 0xFFFF))
648 return IRQ_NONE;
649
650 if (netif_msg_intr(cp))
651 printk(KERN_DEBUG "%s: intr, status %04x cmd %02x cpcmd %04x\n",
652 dev->name, status, cpr8(Cmd), cpr16(CpCmd));
653
654 cpw16(IntrStatus, status & ~cp_rx_intr_mask);
655
656 spin_lock(&cp->lock);
657
658 /* close possible race's with dev_close */
659 if (unlikely(!netif_running(dev))) {
660 cpw16(IntrMask, 0);
661 spin_unlock(&cp->lock);
662 return IRQ_HANDLED;
663 }
664
665 if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
666 if (netif_rx_schedule_prep(dev)) {
667 cpw16_f(IntrMask, cp_norx_intr_mask);
668 __netif_rx_schedule(dev);
669 }
670
671 if (status & (TxOK | TxErr | TxEmpty | SWInt))
672 cp_tx(cp);
673 if (status & LinkChg)
674 mii_check_media(&cp->mii_if, netif_msg_link(cp), FALSE);
675
676 spin_unlock(&cp->lock);
677
678 if (status & PciErr) {
679 u16 pci_status;
680
681 pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
682 pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
683 printk(KERN_ERR "%s: PCI bus error, status=%04x, PCI status=%04x\n",
684 dev->name, status, pci_status);
685
686 /* TODO: reset hardware */
687 }
688
689 return IRQ_HANDLED;
690 }
691
692 #ifdef CONFIG_NET_POLL_CONTROLLER
693 /*
694 * Polling receive - used by netconsole and other diagnostic tools
695 * to allow network i/o with interrupts disabled.
696 */
697 static void cp_poll_controller(struct net_device *dev)
698 {
699 disable_irq(dev->irq);
700 cp_interrupt(dev->irq, dev);
701 enable_irq(dev->irq);
702 }
703 #endif
704
705 static void cp_tx (struct cp_private *cp)
706 {
707 unsigned tx_head = cp->tx_head;
708 unsigned tx_tail = cp->tx_tail;
709
710 while (tx_tail != tx_head) {
711 struct cp_desc *txd = cp->tx_ring + tx_tail;
712 struct sk_buff *skb;
713 u32 status;
714
715 rmb();
716 status = le32_to_cpu(txd->opts1);
717 if (status & DescOwn)
718 break;
719
720 skb = cp->tx_skb[tx_tail];
721 BUG_ON(!skb);
722
723 pci_unmap_single(cp->pdev, le64_to_cpu(txd->addr),
724 le32_to_cpu(txd->opts1) & 0xffff,
725 PCI_DMA_TODEVICE);
726
727 if (status & LastFrag) {
728 if (status & (TxError | TxFIFOUnder)) {
729 if (netif_msg_tx_err(cp))
730 printk(KERN_DEBUG "%s: tx err, status 0x%x\n",
731 cp->dev->name, status);
732 cp->net_stats.tx_errors++;
733 if (status & TxOWC)
734 cp->net_stats.tx_window_errors++;
735 if (status & TxMaxCol)
736 cp->net_stats.tx_aborted_errors++;
737 if (status & TxLinkFail)
738 cp->net_stats.tx_carrier_errors++;
739 if (status & TxFIFOUnder)
740 cp->net_stats.tx_fifo_errors++;
741 } else {
742 cp->net_stats.collisions +=
743 ((status >> TxColCntShift) & TxColCntMask);
744 cp->net_stats.tx_packets++;
745 cp->net_stats.tx_bytes += skb->len;
746 if (netif_msg_tx_done(cp))
747 printk(KERN_DEBUG "%s: tx done, slot %d\n", cp->dev->name, tx_tail);
748 }
749 dev_kfree_skb_irq(skb);
750 }
751
752 cp->tx_skb[tx_tail] = NULL;
753
754 tx_tail = NEXT_TX(tx_tail);
755 }
756
757 cp->tx_tail = tx_tail;
758
759 if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
760 netif_wake_queue(cp->dev);
761 }
762
763 static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev)
764 {
765 struct cp_private *cp = netdev_priv(dev);
766 unsigned entry;
767 u32 eor, flags;
768 unsigned long intr_flags;
769 #if CP_VLAN_TAG_USED
770 u32 vlan_tag = 0;
771 #endif
772 int mss = 0;
773
774 spin_lock_irqsave(&cp->lock, intr_flags);
775
776 /* This is a hard error, log it. */
777 if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) {
778 netif_stop_queue(dev);
779 spin_unlock_irqrestore(&cp->lock, intr_flags);
780 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
781 dev->name);
782 return 1;
783 }
784
785 #if CP_VLAN_TAG_USED
786 if (cp->vlgrp && vlan_tx_tag_present(skb))
787 vlan_tag = TxVlanTag | cpu_to_be16(vlan_tx_tag_get(skb));
788 #endif
789
790 entry = cp->tx_head;
791 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
792 if (dev->features & NETIF_F_TSO)
793 mss = skb_shinfo(skb)->gso_size;
794
795 if (skb_shinfo(skb)->nr_frags == 0) {
796 struct cp_desc *txd = &cp->tx_ring[entry];
797 u32 len;
798 dma_addr_t mapping;
799
800 len = skb->len;
801 mapping = pci_map_single(cp->pdev, skb->data, len, PCI_DMA_TODEVICE);
802 CP_VLAN_TX_TAG(txd, vlan_tag);
803 txd->addr = cpu_to_le64(mapping);
804 wmb();
805
806 flags = eor | len | DescOwn | FirstFrag | LastFrag;
807
808 if (mss)
809 flags |= LargeSend | ((mss & MSSMask) << MSSShift);
810 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
811 const struct iphdr *ip = skb->nh.iph;
812 if (ip->protocol == IPPROTO_TCP)
813 flags |= IPCS | TCPCS;
814 else if (ip->protocol == IPPROTO_UDP)
815 flags |= IPCS | UDPCS;
816 else
817 WARN_ON(1); /* we need a WARN() */
818 }
819
820 txd->opts1 = cpu_to_le32(flags);
821 wmb();
822
823 cp->tx_skb[entry] = skb;
824 entry = NEXT_TX(entry);
825 } else {
826 struct cp_desc *txd;
827 u32 first_len, first_eor;
828 dma_addr_t first_mapping;
829 int frag, first_entry = entry;
830 const struct iphdr *ip = skb->nh.iph;
831
832 /* We must give this initial chunk to the device last.
833 * Otherwise we could race with the device.
834 */
835 first_eor = eor;
836 first_len = skb_headlen(skb);
837 first_mapping = pci_map_single(cp->pdev, skb->data,
838 first_len, PCI_DMA_TODEVICE);
839 cp->tx_skb[entry] = skb;
840 entry = NEXT_TX(entry);
841
842 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
843 skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
844 u32 len;
845 u32 ctrl;
846 dma_addr_t mapping;
847
848 len = this_frag->size;
849 mapping = pci_map_single(cp->pdev,
850 ((void *) page_address(this_frag->page) +
851 this_frag->page_offset),
852 len, PCI_DMA_TODEVICE);
853 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
854
855 ctrl = eor | len | DescOwn;
856
857 if (mss)
858 ctrl |= LargeSend |
859 ((mss & MSSMask) << MSSShift);
860 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
861 if (ip->protocol == IPPROTO_TCP)
862 ctrl |= IPCS | TCPCS;
863 else if (ip->protocol == IPPROTO_UDP)
864 ctrl |= IPCS | UDPCS;
865 else
866 BUG();
867 }
868
869 if (frag == skb_shinfo(skb)->nr_frags - 1)
870 ctrl |= LastFrag;
871
872 txd = &cp->tx_ring[entry];
873 CP_VLAN_TX_TAG(txd, vlan_tag);
874 txd->addr = cpu_to_le64(mapping);
875 wmb();
876
877 txd->opts1 = cpu_to_le32(ctrl);
878 wmb();
879
880 cp->tx_skb[entry] = skb;
881 entry = NEXT_TX(entry);
882 }
883
884 txd = &cp->tx_ring[first_entry];
885 CP_VLAN_TX_TAG(txd, vlan_tag);
886 txd->addr = cpu_to_le64(first_mapping);
887 wmb();
888
889 if (skb->ip_summed == CHECKSUM_PARTIAL) {
890 if (ip->protocol == IPPROTO_TCP)
891 txd->opts1 = cpu_to_le32(first_eor | first_len |
892 FirstFrag | DescOwn |
893 IPCS | TCPCS);
894 else if (ip->protocol == IPPROTO_UDP)
895 txd->opts1 = cpu_to_le32(first_eor | first_len |
896 FirstFrag | DescOwn |
897 IPCS | UDPCS);
898 else
899 BUG();
900 } else
901 txd->opts1 = cpu_to_le32(first_eor | first_len |
902 FirstFrag | DescOwn);
903 wmb();
904 }
905 cp->tx_head = entry;
906 if (netif_msg_tx_queued(cp))
907 printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n",
908 dev->name, entry, skb->len);
909 if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
910 netif_stop_queue(dev);
911
912 spin_unlock_irqrestore(&cp->lock, intr_flags);
913
914 cpw8(TxPoll, NormalTxPoll);
915 dev->trans_start = jiffies;
916
917 return 0;
918 }
919
920 /* Set or clear the multicast filter for this adaptor.
921 This routine is not state sensitive and need not be SMP locked. */
922
923 static void __cp_set_rx_mode (struct net_device *dev)
924 {
925 struct cp_private *cp = netdev_priv(dev);
926 u32 mc_filter[2]; /* Multicast hash filter */
927 int i, rx_mode;
928 u32 tmp;
929
930 /* Note: do not reorder, GCC is clever about common statements. */
931 if (dev->flags & IFF_PROMISC) {
932 /* Unconditionally log net taps. */
933 rx_mode =
934 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
935 AcceptAllPhys;
936 mc_filter[1] = mc_filter[0] = 0xffffffff;
937 } else if ((dev->mc_count > multicast_filter_limit)
938 || (dev->flags & IFF_ALLMULTI)) {
939 /* Too many to filter perfectly -- accept all multicasts. */
940 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
941 mc_filter[1] = mc_filter[0] = 0xffffffff;
942 } else {
943 struct dev_mc_list *mclist;
944 rx_mode = AcceptBroadcast | AcceptMyPhys;
945 mc_filter[1] = mc_filter[0] = 0;
946 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
947 i++, mclist = mclist->next) {
948 int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
949
950 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
951 rx_mode |= AcceptMulticast;
952 }
953 }
954
955 /* We can safely update without stopping the chip. */
956 tmp = cp_rx_config | rx_mode;
957 if (cp->rx_config != tmp) {
958 cpw32_f (RxConfig, tmp);
959 cp->rx_config = tmp;
960 }
961 cpw32_f (MAR0 + 0, mc_filter[0]);
962 cpw32_f (MAR0 + 4, mc_filter[1]);
963 }
964
965 static void cp_set_rx_mode (struct net_device *dev)
966 {
967 unsigned long flags;
968 struct cp_private *cp = netdev_priv(dev);
969
970 spin_lock_irqsave (&cp->lock, flags);
971 __cp_set_rx_mode(dev);
972 spin_unlock_irqrestore (&cp->lock, flags);
973 }
974
975 static void __cp_get_stats(struct cp_private *cp)
976 {
977 /* only lower 24 bits valid; write any value to clear */
978 cp->net_stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff);
979 cpw32 (RxMissed, 0);
980 }
981
982 static struct net_device_stats *cp_get_stats(struct net_device *dev)
983 {
984 struct cp_private *cp = netdev_priv(dev);
985 unsigned long flags;
986
987 /* The chip only need report frame silently dropped. */
988 spin_lock_irqsave(&cp->lock, flags);
989 if (netif_running(dev) && netif_device_present(dev))
990 __cp_get_stats(cp);
991 spin_unlock_irqrestore(&cp->lock, flags);
992
993 return &cp->net_stats;
994 }
995
996 static void cp_stop_hw (struct cp_private *cp)
997 {
998 cpw16(IntrStatus, ~(cpr16(IntrStatus)));
999 cpw16_f(IntrMask, 0);
1000 cpw8(Cmd, 0);
1001 cpw16_f(CpCmd, 0);
1002 cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));
1003
1004 cp->rx_tail = 0;
1005 cp->tx_head = cp->tx_tail = 0;
1006 }
1007
1008 static void cp_reset_hw (struct cp_private *cp)
1009 {
1010 unsigned work = 1000;
1011
1012 cpw8(Cmd, CmdReset);
1013
1014 while (work--) {
1015 if (!(cpr8(Cmd) & CmdReset))
1016 return;
1017
1018 schedule_timeout_uninterruptible(10);
1019 }
1020
1021 printk(KERN_ERR "%s: hardware reset timeout\n", cp->dev->name);
1022 }
1023
1024 static inline void cp_start_hw (struct cp_private *cp)
1025 {
1026 cpw16(CpCmd, cp->cpcmd);
1027 cpw8(Cmd, RxOn | TxOn);
1028 }
1029
1030 static void cp_init_hw (struct cp_private *cp)
1031 {
1032 struct net_device *dev = cp->dev;
1033 dma_addr_t ring_dma;
1034
1035 cp_reset_hw(cp);
1036
1037 cpw8_f (Cfg9346, Cfg9346_Unlock);
1038
1039 /* Restore our idea of the MAC address. */
1040 cpw32_f (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
1041 cpw32_f (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
1042
1043 cp_start_hw(cp);
1044 cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
1045
1046 __cp_set_rx_mode(dev);
1047 cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift));
1048
1049 cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable);
1050 /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */
1051 cpw8(Config3, PARMEnable);
1052 cp->wol_enabled = 0;
1053
1054 cpw8(Config5, cpr8(Config5) & PMEStatus);
1055
1056 cpw32_f(HiTxRingAddr, 0);
1057 cpw32_f(HiTxRingAddr + 4, 0);
1058
1059 ring_dma = cp->ring_dma;
1060 cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
1061 cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
1062
1063 ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
1064 cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
1065 cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
1066
1067 cpw16(MultiIntr, 0);
1068
1069 cpw16_f(IntrMask, cp_intr_mask);
1070
1071 cpw8_f(Cfg9346, Cfg9346_Lock);
1072 }
1073
1074 static int cp_refill_rx (struct cp_private *cp)
1075 {
1076 unsigned i;
1077
1078 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1079 struct sk_buff *skb;
1080 dma_addr_t mapping;
1081
1082 skb = dev_alloc_skb(cp->rx_buf_sz + RX_OFFSET);
1083 if (!skb)
1084 goto err_out;
1085
1086 skb->dev = cp->dev;
1087 skb_reserve(skb, RX_OFFSET);
1088
1089 mapping = pci_map_single(cp->pdev, skb->data, cp->rx_buf_sz,
1090 PCI_DMA_FROMDEVICE);
1091 cp->rx_skb[i] = skb;
1092
1093 cp->rx_ring[i].opts2 = 0;
1094 cp->rx_ring[i].addr = cpu_to_le64(mapping);
1095 if (i == (CP_RX_RING_SIZE - 1))
1096 cp->rx_ring[i].opts1 =
1097 cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz);
1098 else
1099 cp->rx_ring[i].opts1 =
1100 cpu_to_le32(DescOwn | cp->rx_buf_sz);
1101 }
1102
1103 return 0;
1104
1105 err_out:
1106 cp_clean_rings(cp);
1107 return -ENOMEM;
1108 }
1109
1110 static void cp_init_rings_index (struct cp_private *cp)
1111 {
1112 cp->rx_tail = 0;
1113 cp->tx_head = cp->tx_tail = 0;
1114 }
1115
1116 static int cp_init_rings (struct cp_private *cp)
1117 {
1118 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1119 cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
1120
1121 cp_init_rings_index(cp);
1122
1123 return cp_refill_rx (cp);
1124 }
1125
1126 static int cp_alloc_rings (struct cp_private *cp)
1127 {
1128 void *mem;
1129
1130 mem = pci_alloc_consistent(cp->pdev, CP_RING_BYTES, &cp->ring_dma);
1131 if (!mem)
1132 return -ENOMEM;
1133
1134 cp->rx_ring = mem;
1135 cp->tx_ring = &cp->rx_ring[CP_RX_RING_SIZE];
1136
1137 return cp_init_rings(cp);
1138 }
1139
1140 static void cp_clean_rings (struct cp_private *cp)
1141 {
1142 struct cp_desc *desc;
1143 unsigned i;
1144
1145 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1146 if (cp->rx_skb[i]) {
1147 desc = cp->rx_ring + i;
1148 pci_unmap_single(cp->pdev, le64_to_cpu(desc->addr),
1149 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1150 dev_kfree_skb(cp->rx_skb[i]);
1151 }
1152 }
1153
1154 for (i = 0; i < CP_TX_RING_SIZE; i++) {
1155 if (cp->tx_skb[i]) {
1156 struct sk_buff *skb = cp->tx_skb[i];
1157
1158 desc = cp->tx_ring + i;
1159 pci_unmap_single(cp->pdev, le64_to_cpu(desc->addr),
1160 le32_to_cpu(desc->opts1) & 0xffff,
1161 PCI_DMA_TODEVICE);
1162 if (le32_to_cpu(desc->opts1) & LastFrag)
1163 dev_kfree_skb(skb);
1164 cp->net_stats.tx_dropped++;
1165 }
1166 }
1167
1168 memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
1169 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1170
1171 memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE);
1172 memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE);
1173 }
1174
1175 static void cp_free_rings (struct cp_private *cp)
1176 {
1177 cp_clean_rings(cp);
1178 pci_free_consistent(cp->pdev, CP_RING_BYTES, cp->rx_ring, cp->ring_dma);
1179 cp->rx_ring = NULL;
1180 cp->tx_ring = NULL;
1181 }
1182
1183 static int cp_open (struct net_device *dev)
1184 {
1185 struct cp_private *cp = netdev_priv(dev);
1186 int rc;
1187
1188 if (netif_msg_ifup(cp))
1189 printk(KERN_DEBUG "%s: enabling interface\n", dev->name);
1190
1191 rc = cp_alloc_rings(cp);
1192 if (rc)
1193 return rc;
1194
1195 cp_init_hw(cp);
1196
1197 rc = request_irq(dev->irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
1198 if (rc)
1199 goto err_out_hw;
1200
1201 netif_carrier_off(dev);
1202 mii_check_media(&cp->mii_if, netif_msg_link(cp), TRUE);
1203 netif_start_queue(dev);
1204
1205 return 0;
1206
1207 err_out_hw:
1208 cp_stop_hw(cp);
1209 cp_free_rings(cp);
1210 return rc;
1211 }
1212
1213 static int cp_close (struct net_device *dev)
1214 {
1215 struct cp_private *cp = netdev_priv(dev);
1216 unsigned long flags;
1217
1218 if (netif_msg_ifdown(cp))
1219 printk(KERN_DEBUG "%s: disabling interface\n", dev->name);
1220
1221 spin_lock_irqsave(&cp->lock, flags);
1222
1223 netif_stop_queue(dev);
1224 netif_carrier_off(dev);
1225
1226 cp_stop_hw(cp);
1227
1228 spin_unlock_irqrestore(&cp->lock, flags);
1229
1230 synchronize_irq(dev->irq);
1231 free_irq(dev->irq, dev);
1232
1233 cp_free_rings(cp);
1234 return 0;
1235 }
1236
1237 #ifdef BROKEN
1238 static int cp_change_mtu(struct net_device *dev, int new_mtu)
1239 {
1240 struct cp_private *cp = netdev_priv(dev);
1241 int rc;
1242 unsigned long flags;
1243
1244 /* check for invalid MTU, according to hardware limits */
1245 if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU)
1246 return -EINVAL;
1247
1248 /* if network interface not up, no need for complexity */
1249 if (!netif_running(dev)) {
1250 dev->mtu = new_mtu;
1251 cp_set_rxbufsize(cp); /* set new rx buf size */
1252 return 0;
1253 }
1254
1255 spin_lock_irqsave(&cp->lock, flags);
1256
1257 cp_stop_hw(cp); /* stop h/w and free rings */
1258 cp_clean_rings(cp);
1259
1260 dev->mtu = new_mtu;
1261 cp_set_rxbufsize(cp); /* set new rx buf size */
1262
1263 rc = cp_init_rings(cp); /* realloc and restart h/w */
1264 cp_start_hw(cp);
1265
1266 spin_unlock_irqrestore(&cp->lock, flags);
1267
1268 return rc;
1269 }
1270 #endif /* BROKEN */
1271
1272 static const char mii_2_8139_map[8] = {
1273 BasicModeCtrl,
1274 BasicModeStatus,
1275 0,
1276 0,
1277 NWayAdvert,
1278 NWayLPAR,
1279 NWayExpansion,
1280 0
1281 };
1282
1283 static int mdio_read(struct net_device *dev, int phy_id, int location)
1284 {
1285 struct cp_private *cp = netdev_priv(dev);
1286
1287 return location < 8 && mii_2_8139_map[location] ?
1288 readw(cp->regs + mii_2_8139_map[location]) : 0;
1289 }
1290
1291
1292 static void mdio_write(struct net_device *dev, int phy_id, int location,
1293 int value)
1294 {
1295 struct cp_private *cp = netdev_priv(dev);
1296
1297 if (location == 0) {
1298 cpw8(Cfg9346, Cfg9346_Unlock);
1299 cpw16(BasicModeCtrl, value);
1300 cpw8(Cfg9346, Cfg9346_Lock);
1301 } else if (location < 8 && mii_2_8139_map[location])
1302 cpw16(mii_2_8139_map[location], value);
1303 }
1304
1305 /* Set the ethtool Wake-on-LAN settings */
1306 static int netdev_set_wol (struct cp_private *cp,
1307 const struct ethtool_wolinfo *wol)
1308 {
1309 u8 options;
1310
1311 options = cpr8 (Config3) & ~(LinkUp | MagicPacket);
1312 /* If WOL is being disabled, no need for complexity */
1313 if (wol->wolopts) {
1314 if (wol->wolopts & WAKE_PHY) options |= LinkUp;
1315 if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket;
1316 }
1317
1318 cpw8 (Cfg9346, Cfg9346_Unlock);
1319 cpw8 (Config3, options);
1320 cpw8 (Cfg9346, Cfg9346_Lock);
1321
1322 options = 0; /* Paranoia setting */
1323 options = cpr8 (Config5) & ~(UWF | MWF | BWF);
1324 /* If WOL is being disabled, no need for complexity */
1325 if (wol->wolopts) {
1326 if (wol->wolopts & WAKE_UCAST) options |= UWF;
1327 if (wol->wolopts & WAKE_BCAST) options |= BWF;
1328 if (wol->wolopts & WAKE_MCAST) options |= MWF;
1329 }
1330
1331 cpw8 (Config5, options);
1332
1333 cp->wol_enabled = (wol->wolopts) ? 1 : 0;
1334
1335 return 0;
1336 }
1337
1338 /* Get the ethtool Wake-on-LAN settings */
1339 static void netdev_get_wol (struct cp_private *cp,
1340 struct ethtool_wolinfo *wol)
1341 {
1342 u8 options;
1343
1344 wol->wolopts = 0; /* Start from scratch */
1345 wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC |
1346 WAKE_MCAST | WAKE_UCAST;
1347 /* We don't need to go on if WOL is disabled */
1348 if (!cp->wol_enabled) return;
1349
1350 options = cpr8 (Config3);
1351 if (options & LinkUp) wol->wolopts |= WAKE_PHY;
1352 if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC;
1353
1354 options = 0; /* Paranoia setting */
1355 options = cpr8 (Config5);
1356 if (options & UWF) wol->wolopts |= WAKE_UCAST;
1357 if (options & BWF) wol->wolopts |= WAKE_BCAST;
1358 if (options & MWF) wol->wolopts |= WAKE_MCAST;
1359 }
1360
1361 static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1362 {
1363 struct cp_private *cp = netdev_priv(dev);
1364
1365 strcpy (info->driver, DRV_NAME);
1366 strcpy (info->version, DRV_VERSION);
1367 strcpy (info->bus_info, pci_name(cp->pdev));
1368 }
1369
1370 static int cp_get_regs_len(struct net_device *dev)
1371 {
1372 return CP_REGS_SIZE;
1373 }
1374
1375 static int cp_get_stats_count (struct net_device *dev)
1376 {
1377 return CP_NUM_STATS;
1378 }
1379
1380 static int cp_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1381 {
1382 struct cp_private *cp = netdev_priv(dev);
1383 int rc;
1384 unsigned long flags;
1385
1386 spin_lock_irqsave(&cp->lock, flags);
1387 rc = mii_ethtool_gset(&cp->mii_if, cmd);
1388 spin_unlock_irqrestore(&cp->lock, flags);
1389
1390 return rc;
1391 }
1392
1393 static int cp_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1394 {
1395 struct cp_private *cp = netdev_priv(dev);
1396 int rc;
1397 unsigned long flags;
1398
1399 spin_lock_irqsave(&cp->lock, flags);
1400 rc = mii_ethtool_sset(&cp->mii_if, cmd);
1401 spin_unlock_irqrestore(&cp->lock, flags);
1402
1403 return rc;
1404 }
1405
1406 static int cp_nway_reset(struct net_device *dev)
1407 {
1408 struct cp_private *cp = netdev_priv(dev);
1409 return mii_nway_restart(&cp->mii_if);
1410 }
1411
1412 static u32 cp_get_msglevel(struct net_device *dev)
1413 {
1414 struct cp_private *cp = netdev_priv(dev);
1415 return cp->msg_enable;
1416 }
1417
1418 static void cp_set_msglevel(struct net_device *dev, u32 value)
1419 {
1420 struct cp_private *cp = netdev_priv(dev);
1421 cp->msg_enable = value;
1422 }
1423
1424 static u32 cp_get_rx_csum(struct net_device *dev)
1425 {
1426 struct cp_private *cp = netdev_priv(dev);
1427 return (cpr16(CpCmd) & RxChkSum) ? 1 : 0;
1428 }
1429
1430 static int cp_set_rx_csum(struct net_device *dev, u32 data)
1431 {
1432 struct cp_private *cp = netdev_priv(dev);
1433 u16 cmd = cp->cpcmd, newcmd;
1434
1435 newcmd = cmd;
1436
1437 if (data)
1438 newcmd |= RxChkSum;
1439 else
1440 newcmd &= ~RxChkSum;
1441
1442 if (newcmd != cmd) {
1443 unsigned long flags;
1444
1445 spin_lock_irqsave(&cp->lock, flags);
1446 cp->cpcmd = newcmd;
1447 cpw16_f(CpCmd, newcmd);
1448 spin_unlock_irqrestore(&cp->lock, flags);
1449 }
1450
1451 return 0;
1452 }
1453
1454 static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1455 void *p)
1456 {
1457 struct cp_private *cp = netdev_priv(dev);
1458 unsigned long flags;
1459
1460 if (regs->len < CP_REGS_SIZE)
1461 return /* -EINVAL */;
1462
1463 regs->version = CP_REGS_VER;
1464
1465 spin_lock_irqsave(&cp->lock, flags);
1466 memcpy_fromio(p, cp->regs, CP_REGS_SIZE);
1467 spin_unlock_irqrestore(&cp->lock, flags);
1468 }
1469
1470 static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1471 {
1472 struct cp_private *cp = netdev_priv(dev);
1473 unsigned long flags;
1474
1475 spin_lock_irqsave (&cp->lock, flags);
1476 netdev_get_wol (cp, wol);
1477 spin_unlock_irqrestore (&cp->lock, flags);
1478 }
1479
1480 static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1481 {
1482 struct cp_private *cp = netdev_priv(dev);
1483 unsigned long flags;
1484 int rc;
1485
1486 spin_lock_irqsave (&cp->lock, flags);
1487 rc = netdev_set_wol (cp, wol);
1488 spin_unlock_irqrestore (&cp->lock, flags);
1489
1490 return rc;
1491 }
1492
1493 static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf)
1494 {
1495 switch (stringset) {
1496 case ETH_SS_STATS:
1497 memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
1498 break;
1499 default:
1500 BUG();
1501 break;
1502 }
1503 }
1504
1505 static void cp_get_ethtool_stats (struct net_device *dev,
1506 struct ethtool_stats *estats, u64 *tmp_stats)
1507 {
1508 struct cp_private *cp = netdev_priv(dev);
1509 struct cp_dma_stats *nic_stats;
1510 dma_addr_t dma;
1511 int i;
1512
1513 nic_stats = pci_alloc_consistent(cp->pdev, sizeof(*nic_stats), &dma);
1514 if (!nic_stats)
1515 return;
1516
1517 /* begin NIC statistics dump */
1518 cpw32(StatsAddr + 4, (u64)dma >> 32);
1519 cpw32(StatsAddr, ((u64)dma & DMA_32BIT_MASK) | DumpStats);
1520 cpr32(StatsAddr);
1521
1522 for (i = 0; i < 1000; i++) {
1523 if ((cpr32(StatsAddr) & DumpStats) == 0)
1524 break;
1525 udelay(10);
1526 }
1527 cpw32(StatsAddr, 0);
1528 cpw32(StatsAddr + 4, 0);
1529 cpr32(StatsAddr);
1530
1531 i = 0;
1532 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_ok);
1533 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok);
1534 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_err);
1535 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_err);
1536 tmp_stats[i++] = le16_to_cpu(nic_stats->rx_fifo);
1537 tmp_stats[i++] = le16_to_cpu(nic_stats->frame_align);
1538 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_1col);
1539 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_mcol);
1540 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_phys);
1541 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_bcast);
1542 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_ok_mcast);
1543 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_abort);
1544 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_underrun);
1545 tmp_stats[i++] = cp->cp_stats.rx_frags;
1546 BUG_ON(i != CP_NUM_STATS);
1547
1548 pci_free_consistent(cp->pdev, sizeof(*nic_stats), nic_stats, dma);
1549 }
1550
1551 static const struct ethtool_ops cp_ethtool_ops = {
1552 .get_drvinfo = cp_get_drvinfo,
1553 .get_regs_len = cp_get_regs_len,
1554 .get_stats_count = cp_get_stats_count,
1555 .get_settings = cp_get_settings,
1556 .set_settings = cp_set_settings,
1557 .nway_reset = cp_nway_reset,
1558 .get_link = ethtool_op_get_link,
1559 .get_msglevel = cp_get_msglevel,
1560 .set_msglevel = cp_set_msglevel,
1561 .get_rx_csum = cp_get_rx_csum,
1562 .set_rx_csum = cp_set_rx_csum,
1563 .get_tx_csum = ethtool_op_get_tx_csum,
1564 .set_tx_csum = ethtool_op_set_tx_csum, /* local! */
1565 .get_sg = ethtool_op_get_sg,
1566 .set_sg = ethtool_op_set_sg,
1567 .get_tso = ethtool_op_get_tso,
1568 .set_tso = ethtool_op_set_tso,
1569 .get_regs = cp_get_regs,
1570 .get_wol = cp_get_wol,
1571 .set_wol = cp_set_wol,
1572 .get_strings = cp_get_strings,
1573 .get_ethtool_stats = cp_get_ethtool_stats,
1574 .get_perm_addr = ethtool_op_get_perm_addr,
1575 .get_eeprom_len = cp_get_eeprom_len,
1576 .get_eeprom = cp_get_eeprom,
1577 .set_eeprom = cp_set_eeprom,
1578 };
1579
1580 static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1581 {
1582 struct cp_private *cp = netdev_priv(dev);
1583 int rc;
1584 unsigned long flags;
1585
1586 if (!netif_running(dev))
1587 return -EINVAL;
1588
1589 spin_lock_irqsave(&cp->lock, flags);
1590 rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL);
1591 spin_unlock_irqrestore(&cp->lock, flags);
1592 return rc;
1593 }
1594
1595 /* Serial EEPROM section. */
1596
1597 /* EEPROM_Ctrl bits. */
1598 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1599 #define EE_CS 0x08 /* EEPROM chip select. */
1600 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1601 #define EE_WRITE_0 0x00
1602 #define EE_WRITE_1 0x02
1603 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1604 #define EE_ENB (0x80 | EE_CS)
1605
1606 /* Delay between EEPROM clock transitions.
1607 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1608 */
1609
1610 #define eeprom_delay() readl(ee_addr)
1611
1612 /* The EEPROM commands include the alway-set leading bit. */
1613 #define EE_EXTEND_CMD (4)
1614 #define EE_WRITE_CMD (5)
1615 #define EE_READ_CMD (6)
1616 #define EE_ERASE_CMD (7)
1617
1618 #define EE_EWDS_ADDR (0)
1619 #define EE_WRAL_ADDR (1)
1620 #define EE_ERAL_ADDR (2)
1621 #define EE_EWEN_ADDR (3)
1622
1623 #define CP_EEPROM_MAGIC PCI_DEVICE_ID_REALTEK_8139
1624
1625 static void eeprom_cmd_start(void __iomem *ee_addr)
1626 {
1627 writeb (EE_ENB & ~EE_CS, ee_addr);
1628 writeb (EE_ENB, ee_addr);
1629 eeprom_delay ();
1630 }
1631
1632 static void eeprom_cmd(void __iomem *ee_addr, int cmd, int cmd_len)
1633 {
1634 int i;
1635
1636 /* Shift the command bits out. */
1637 for (i = cmd_len - 1; i >= 0; i--) {
1638 int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1639 writeb (EE_ENB | dataval, ee_addr);
1640 eeprom_delay ();
1641 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1642 eeprom_delay ();
1643 }
1644 writeb (EE_ENB, ee_addr);
1645 eeprom_delay ();
1646 }
1647
1648 static void eeprom_cmd_end(void __iomem *ee_addr)
1649 {
1650 writeb (~EE_CS, ee_addr);
1651 eeprom_delay ();
1652 }
1653
1654 static void eeprom_extend_cmd(void __iomem *ee_addr, int extend_cmd,
1655 int addr_len)
1656 {
1657 int cmd = (EE_EXTEND_CMD << addr_len) | (extend_cmd << (addr_len - 2));
1658
1659 eeprom_cmd_start(ee_addr);
1660 eeprom_cmd(ee_addr, cmd, 3 + addr_len);
1661 eeprom_cmd_end(ee_addr);
1662 }
1663
1664 static u16 read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1665 {
1666 int i;
1667 u16 retval = 0;
1668 void __iomem *ee_addr = ioaddr + Cfg9346;
1669 int read_cmd = location | (EE_READ_CMD << addr_len);
1670
1671 eeprom_cmd_start(ee_addr);
1672 eeprom_cmd(ee_addr, read_cmd, 3 + addr_len);
1673
1674 for (i = 16; i > 0; i--) {
1675 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
1676 eeprom_delay ();
1677 retval =
1678 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
1679 0);
1680 writeb (EE_ENB, ee_addr);
1681 eeprom_delay ();
1682 }
1683
1684 eeprom_cmd_end(ee_addr);
1685
1686 return retval;
1687 }
1688
1689 static void write_eeprom(void __iomem *ioaddr, int location, u16 val,
1690 int addr_len)
1691 {
1692 int i;
1693 void __iomem *ee_addr = ioaddr + Cfg9346;
1694 int write_cmd = location | (EE_WRITE_CMD << addr_len);
1695
1696 eeprom_extend_cmd(ee_addr, EE_EWEN_ADDR, addr_len);
1697
1698 eeprom_cmd_start(ee_addr);
1699 eeprom_cmd(ee_addr, write_cmd, 3 + addr_len);
1700 eeprom_cmd(ee_addr, val, 16);
1701 eeprom_cmd_end(ee_addr);
1702
1703 eeprom_cmd_start(ee_addr);
1704 for (i = 0; i < 20000; i++)
1705 if (readb(ee_addr) & EE_DATA_READ)
1706 break;
1707 eeprom_cmd_end(ee_addr);
1708
1709 eeprom_extend_cmd(ee_addr, EE_EWDS_ADDR, addr_len);
1710 }
1711
1712 static int cp_get_eeprom_len(struct net_device *dev)
1713 {
1714 struct cp_private *cp = netdev_priv(dev);
1715 int size;
1716
1717 spin_lock_irq(&cp->lock);
1718 size = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 256 : 128;
1719 spin_unlock_irq(&cp->lock);
1720
1721 return size;
1722 }
1723
1724 static int cp_get_eeprom(struct net_device *dev,
1725 struct ethtool_eeprom *eeprom, u8 *data)
1726 {
1727 struct cp_private *cp = netdev_priv(dev);
1728 unsigned int addr_len;
1729 u16 val;
1730 u32 offset = eeprom->offset >> 1;
1731 u32 len = eeprom->len;
1732 u32 i = 0;
1733
1734 eeprom->magic = CP_EEPROM_MAGIC;
1735
1736 spin_lock_irq(&cp->lock);
1737
1738 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1739
1740 if (eeprom->offset & 1) {
1741 val = read_eeprom(cp->regs, offset, addr_len);
1742 data[i++] = (u8)(val >> 8);
1743 offset++;
1744 }
1745
1746 while (i < len - 1) {
1747 val = read_eeprom(cp->regs, offset, addr_len);
1748 data[i++] = (u8)val;
1749 data[i++] = (u8)(val >> 8);
1750 offset++;
1751 }
1752
1753 if (i < len) {
1754 val = read_eeprom(cp->regs, offset, addr_len);
1755 data[i] = (u8)val;
1756 }
1757
1758 spin_unlock_irq(&cp->lock);
1759 return 0;
1760 }
1761
1762 static int cp_set_eeprom(struct net_device *dev,
1763 struct ethtool_eeprom *eeprom, u8 *data)
1764 {
1765 struct cp_private *cp = netdev_priv(dev);
1766 unsigned int addr_len;
1767 u16 val;
1768 u32 offset = eeprom->offset >> 1;
1769 u32 len = eeprom->len;
1770 u32 i = 0;
1771
1772 if (eeprom->magic != CP_EEPROM_MAGIC)
1773 return -EINVAL;
1774
1775 spin_lock_irq(&cp->lock);
1776
1777 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1778
1779 if (eeprom->offset & 1) {
1780 val = read_eeprom(cp->regs, offset, addr_len) & 0xff;
1781 val |= (u16)data[i++] << 8;
1782 write_eeprom(cp->regs, offset, val, addr_len);
1783 offset++;
1784 }
1785
1786 while (i < len - 1) {
1787 val = (u16)data[i++];
1788 val |= (u16)data[i++] << 8;
1789 write_eeprom(cp->regs, offset, val, addr_len);
1790 offset++;
1791 }
1792
1793 if (i < len) {
1794 val = read_eeprom(cp->regs, offset, addr_len) & 0xff00;
1795 val |= (u16)data[i];
1796 write_eeprom(cp->regs, offset, val, addr_len);
1797 }
1798
1799 spin_unlock_irq(&cp->lock);
1800 return 0;
1801 }
1802
1803 /* Put the board into D3cold state and wait for WakeUp signal */
1804 static void cp_set_d3_state (struct cp_private *cp)
1805 {
1806 pci_enable_wake (cp->pdev, 0, 1); /* Enable PME# generation */
1807 pci_set_power_state (cp->pdev, PCI_D3hot);
1808 }
1809
1810 static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1811 {
1812 struct net_device *dev;
1813 struct cp_private *cp;
1814 int rc;
1815 void __iomem *regs;
1816 resource_size_t pciaddr;
1817 unsigned int addr_len, i, pci_using_dac;
1818 u8 pci_rev;
1819
1820 #ifndef MODULE
1821 static int version_printed;
1822 if (version_printed++ == 0)
1823 printk("%s", version);
1824 #endif
1825
1826 pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev);
1827
1828 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
1829 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pci_rev < 0x20) {
1830 dev_err(&pdev->dev,
1831 "This (id %04x:%04x rev %02x) is not an 8139C+ compatible chip\n",
1832 pdev->vendor, pdev->device, pci_rev);
1833 dev_err(&pdev->dev, "Try the \"8139too\" driver instead.\n");
1834 return -ENODEV;
1835 }
1836
1837 dev = alloc_etherdev(sizeof(struct cp_private));
1838 if (!dev)
1839 return -ENOMEM;
1840 SET_MODULE_OWNER(dev);
1841 SET_NETDEV_DEV(dev, &pdev->dev);
1842
1843 cp = netdev_priv(dev);
1844 cp->pdev = pdev;
1845 cp->dev = dev;
1846 cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug);
1847 spin_lock_init (&cp->lock);
1848 cp->mii_if.dev = dev;
1849 cp->mii_if.mdio_read = mdio_read;
1850 cp->mii_if.mdio_write = mdio_write;
1851 cp->mii_if.phy_id = CP_INTERNAL_PHY;
1852 cp->mii_if.phy_id_mask = 0x1f;
1853 cp->mii_if.reg_num_mask = 0x1f;
1854 cp_set_rxbufsize(cp);
1855
1856 rc = pci_enable_device(pdev);
1857 if (rc)
1858 goto err_out_free;
1859
1860 rc = pci_set_mwi(pdev);
1861 if (rc)
1862 goto err_out_disable;
1863
1864 rc = pci_request_regions(pdev, DRV_NAME);
1865 if (rc)
1866 goto err_out_mwi;
1867
1868 pciaddr = pci_resource_start(pdev, 1);
1869 if (!pciaddr) {
1870 rc = -EIO;
1871 dev_err(&pdev->dev, "no MMIO resource\n");
1872 goto err_out_res;
1873 }
1874 if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) {
1875 rc = -EIO;
1876 dev_err(&pdev->dev, "MMIO resource (%llx) too small\n",
1877 (unsigned long long)pci_resource_len(pdev, 1));
1878 goto err_out_res;
1879 }
1880
1881 /* Configure DMA attributes. */
1882 if ((sizeof(dma_addr_t) > 4) &&
1883 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) &&
1884 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1885 pci_using_dac = 1;
1886 } else {
1887 pci_using_dac = 0;
1888
1889 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1890 if (rc) {
1891 dev_err(&pdev->dev,
1892 "No usable DMA configuration, aborting.\n");
1893 goto err_out_res;
1894 }
1895 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1896 if (rc) {
1897 dev_err(&pdev->dev,
1898 "No usable consistent DMA configuration, "
1899 "aborting.\n");
1900 goto err_out_res;
1901 }
1902 }
1903
1904 cp->cpcmd = (pci_using_dac ? PCIDAC : 0) |
1905 PCIMulRW | RxChkSum | CpRxOn | CpTxOn;
1906
1907 regs = ioremap(pciaddr, CP_REGS_SIZE);
1908 if (!regs) {
1909 rc = -EIO;
1910 dev_err(&pdev->dev, "Cannot map PCI MMIO (%Lx@%Lx)\n",
1911 (unsigned long long)pci_resource_len(pdev, 1),
1912 (unsigned long long)pciaddr);
1913 goto err_out_res;
1914 }
1915 dev->base_addr = (unsigned long) regs;
1916 cp->regs = regs;
1917
1918 cp_stop_hw(cp);
1919
1920 /* read MAC address from EEPROM */
1921 addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6;
1922 for (i = 0; i < 3; i++)
1923 ((u16 *) (dev->dev_addr))[i] =
1924 le16_to_cpu (read_eeprom (regs, i + 7, addr_len));
1925 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1926
1927 dev->open = cp_open;
1928 dev->stop = cp_close;
1929 dev->set_multicast_list = cp_set_rx_mode;
1930 dev->hard_start_xmit = cp_start_xmit;
1931 dev->get_stats = cp_get_stats;
1932 dev->do_ioctl = cp_ioctl;
1933 dev->poll = cp_rx_poll;
1934 #ifdef CONFIG_NET_POLL_CONTROLLER
1935 dev->poll_controller = cp_poll_controller;
1936 #endif
1937 dev->weight = 16; /* arbitrary? from NAPI_HOWTO.txt. */
1938 #ifdef BROKEN
1939 dev->change_mtu = cp_change_mtu;
1940 #endif
1941 dev->ethtool_ops = &cp_ethtool_ops;
1942 #if 0
1943 dev->tx_timeout = cp_tx_timeout;
1944 dev->watchdog_timeo = TX_TIMEOUT;
1945 #endif
1946
1947 #if CP_VLAN_TAG_USED
1948 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1949 dev->vlan_rx_register = cp_vlan_rx_register;
1950 dev->vlan_rx_kill_vid = cp_vlan_rx_kill_vid;
1951 #endif
1952
1953 if (pci_using_dac)
1954 dev->features |= NETIF_F_HIGHDMA;
1955
1956 #if 0 /* disabled by default until verified */
1957 dev->features |= NETIF_F_TSO;
1958 #endif
1959
1960 dev->irq = pdev->irq;
1961
1962 rc = register_netdev(dev);
1963 if (rc)
1964 goto err_out_iomap;
1965
1966 printk (KERN_INFO "%s: RTL-8139C+ at 0x%lx, "
1967 "%02x:%02x:%02x:%02x:%02x:%02x, "
1968 "IRQ %d\n",
1969 dev->name,
1970 dev->base_addr,
1971 dev->dev_addr[0], dev->dev_addr[1],
1972 dev->dev_addr[2], dev->dev_addr[3],
1973 dev->dev_addr[4], dev->dev_addr[5],
1974 dev->irq);
1975
1976 pci_set_drvdata(pdev, dev);
1977
1978 /* enable busmastering and memory-write-invalidate */
1979 pci_set_master(pdev);
1980
1981 if (cp->wol_enabled)
1982 cp_set_d3_state (cp);
1983
1984 return 0;
1985
1986 err_out_iomap:
1987 iounmap(regs);
1988 err_out_res:
1989 pci_release_regions(pdev);
1990 err_out_mwi:
1991 pci_clear_mwi(pdev);
1992 err_out_disable:
1993 pci_disable_device(pdev);
1994 err_out_free:
1995 free_netdev(dev);
1996 return rc;
1997 }
1998
1999 static void cp_remove_one (struct pci_dev *pdev)
2000 {
2001 struct net_device *dev = pci_get_drvdata(pdev);
2002 struct cp_private *cp = netdev_priv(dev);
2003
2004 unregister_netdev(dev);
2005 iounmap(cp->regs);
2006 if (cp->wol_enabled)
2007 pci_set_power_state (pdev, PCI_D0);
2008 pci_release_regions(pdev);
2009 pci_clear_mwi(pdev);
2010 pci_disable_device(pdev);
2011 pci_set_drvdata(pdev, NULL);
2012 free_netdev(dev);
2013 }
2014
2015 #ifdef CONFIG_PM
2016 static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
2017 {
2018 struct net_device *dev = pci_get_drvdata(pdev);
2019 struct cp_private *cp = netdev_priv(dev);
2020 unsigned long flags;
2021
2022 if (!netif_running(dev))
2023 return 0;
2024
2025 netif_device_detach (dev);
2026 netif_stop_queue (dev);
2027
2028 spin_lock_irqsave (&cp->lock, flags);
2029
2030 /* Disable Rx and Tx */
2031 cpw16 (IntrMask, 0);
2032 cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn));
2033
2034 spin_unlock_irqrestore (&cp->lock, flags);
2035
2036 pci_save_state(pdev);
2037 pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
2038 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2039
2040 return 0;
2041 }
2042
2043 static int cp_resume (struct pci_dev *pdev)
2044 {
2045 struct net_device *dev = pci_get_drvdata (pdev);
2046 struct cp_private *cp = netdev_priv(dev);
2047 unsigned long flags;
2048
2049 if (!netif_running(dev))
2050 return 0;
2051
2052 netif_device_attach (dev);
2053
2054 pci_set_power_state(pdev, PCI_D0);
2055 pci_restore_state(pdev);
2056 pci_enable_wake(pdev, PCI_D0, 0);
2057
2058 /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
2059 cp_init_rings_index (cp);
2060 cp_init_hw (cp);
2061 netif_start_queue (dev);
2062
2063 spin_lock_irqsave (&cp->lock, flags);
2064
2065 mii_check_media(&cp->mii_if, netif_msg_link(cp), FALSE);
2066
2067 spin_unlock_irqrestore (&cp->lock, flags);
2068
2069 return 0;
2070 }
2071 #endif /* CONFIG_PM */
2072
2073 static struct pci_driver cp_driver = {
2074 .name = DRV_NAME,
2075 .id_table = cp_pci_tbl,
2076 .probe = cp_init_one,
2077 .remove = cp_remove_one,
2078 #ifdef CONFIG_PM
2079 .resume = cp_resume,
2080 .suspend = cp_suspend,
2081 #endif
2082 };
2083
2084 static int __init cp_init (void)
2085 {
2086 #ifdef MODULE
2087 printk("%s", version);
2088 #endif
2089 return pci_register_driver(&cp_driver);
2090 }
2091
2092 static void __exit cp_exit (void)
2093 {
2094 pci_unregister_driver (&cp_driver);
2095 }
2096
2097 module_init(cp_init);
2098 module_exit(cp_exit);
Linux kernel - Deliverables
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