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8139cp: Do not re-enable RX interrupts in cp_tx_timeout()
[deliverable/linux.git] / drivers / net / ethernet / realtek / 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
30 Low priority TODO:
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
38 Tx descriptor bit
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)
42
43 NOTES:
44 * TX checksumming is considered experimental. It is off by
45 default, use ethtool to turn it on.
46
47 */
48
49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50
51 #define DRV_NAME "8139cp"
52 #define DRV_VERSION "1.3"
53 #define DRV_RELDATE "Mar 22, 2004"
54
55
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>
72 #include <linux/in.h>
73 #include <linux/ip.h>
74 #include <linux/tcp.h>
75 #include <linux/udp.h>
76 #include <linux/cache.h>
77 #include <asm/io.h>
78 #include <asm/irq.h>
79 #include <asm/uaccess.h>
80
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";
84
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");
89
90 static int debug = -1;
91 module_param(debug, int, 0);
92 MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
93
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");
99
100 #define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
101 NETIF_MSG_PROBE | \
102 NETIF_MSG_LINK)
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) + \
112 CP_STATS_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)
119
120 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
121 #define CP_INTERNAL_PHY 32
122
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 */
128
129 /* Time in jiffies before concluding the transmitter is hung. */
130 #define TX_TIMEOUT (6*HZ)
131
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
135
136 enum {
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) */
169
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 */
191 RxProtoTCP = 1,
192 RxProtoUDP = 2,
193 RxProtoIP = 3,
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 */
206
207 /* StatsAddr register */
208 DumpStats = (1 << 3), /* Begin stats dump */
209
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 */
219
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 */
235
236 IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty |
237 RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK |
238 RxErr | RxOK | IntrResvd,
239
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 */
244
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 */
252
253 /* Cfg9436 EEPROM control register */
254 Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */
255 Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */
256
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 */
260
261 /* Early Tx Threshold register */
262 TxThreshMask = 0x3f, /* Mask bits 5-0 */
263 TxThreshMax = 2048, /* Max early Tx threshold */
264
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 */
269
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 */
274
275 /* Config4 register */
276 LWPTN = (1 << 1), /* LWAKE Pattern */
277 LWPME = (1 << 4), /* LANWAKE vs PMEB */
278
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# */
285
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,
289 };
290
291 static const unsigned int cp_rx_config =
292 (RX_FIFO_THRESH << RxCfgFIFOShift) |
293 (RX_DMA_BURST << RxCfgDMAShift);
294
295 struct cp_desc {
296 __le32 opts1;
297 __le32 opts2;
298 __le64 addr;
299 };
300
301 struct cp_dma_stats {
302 __le64 tx_ok;
303 __le64 rx_ok;
304 __le64 tx_err;
305 __le32 rx_err;
306 __le16 rx_fifo;
307 __le16 frame_align;
308 __le32 tx_ok_1col;
309 __le32 tx_ok_mcol;
310 __le64 rx_ok_phys;
311 __le64 rx_ok_bcast;
312 __le32 rx_ok_mcast;
313 __le16 tx_abort;
314 __le16 tx_underrun;
315 } __packed;
316
317 struct cp_extra_stats {
318 unsigned long rx_frags;
319 };
320
321 struct cp_private {
322 void __iomem *regs;
323 struct net_device *dev;
324 spinlock_t lock;
325 u32 msg_enable;
326
327 struct napi_struct napi;
328
329 struct pci_dev *pdev;
330 u32 rx_config;
331 u16 cpcmd;
332
333 struct cp_extra_stats cp_stats;
334
335 unsigned rx_head ____cacheline_aligned;
336 unsigned rx_tail;
337 struct cp_desc *rx_ring;
338 struct sk_buff *rx_skb[CP_RX_RING_SIZE];
339
340 unsigned tx_head ____cacheline_aligned;
341 unsigned tx_tail;
342 struct cp_desc *tx_ring;
343 struct sk_buff *tx_skb[CP_TX_RING_SIZE];
344
345 unsigned rx_buf_sz;
346 unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */
347
348 dma_addr_t ring_dma;
349
350 struct mii_if_info mii_if;
351 };
352
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)); \
362 } while (0)
363 #define cpw16_f(reg,val) do { \
364 writew((val), cp->regs + (reg)); \
365 readw(cp->regs + (reg)); \
366 } while (0)
367 #define cpw32_f(reg,val) do { \
368 writel((val), cp->regs + (reg)); \
369 readl(cp->regs + (reg)); \
370 } while (0)
371
372
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);
378 #endif
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);
384
385 static struct {
386 const char str[ETH_GSTRING_LEN];
387 } ethtool_stats_keys[] = {
388 { "tx_ok" },
389 { "rx_ok" },
390 { "tx_err" },
391 { "rx_err" },
392 { "rx_fifo" },
393 { "frame_align" },
394 { "tx_ok_1col" },
395 { "tx_ok_mcol" },
396 { "rx_ok_phys" },
397 { "rx_ok_bcast" },
398 { "rx_ok_mcast" },
399 { "tx_abort" },
400 { "tx_underrun" },
401 { "rx_frags" },
402 };
403
404
405 static inline void cp_set_rxbufsize (struct cp_private *cp)
406 {
407 unsigned int mtu = cp->dev->mtu;
408
409 if (mtu > ETH_DATA_LEN)
410 /* MTU + ethernet header + FCS + optional VLAN tag */
411 cp->rx_buf_sz = mtu + ETH_HLEN + 8;
412 else
413 cp->rx_buf_sz = PKT_BUF_SZ;
414 }
415
416 static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb,
417 struct cp_desc *desc)
418 {
419 u32 opts2 = le32_to_cpu(desc->opts2);
420
421 skb->protocol = eth_type_trans (skb, cp->dev);
422
423 cp->dev->stats.rx_packets++;
424 cp->dev->stats.rx_bytes += skb->len;
425
426 if (opts2 & RxVlanTagged)
427 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), swab16(opts2 & 0xffff));
428
429 napi_gro_receive(&cp->napi, skb);
430 }
431
432 static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail,
433 u32 status, u32 len)
434 {
435 netif_dbg(cp, rx_err, cp->dev, "rx err, slot %d status 0x%x len %d\n",
436 rx_tail, status, len);
437 cp->dev->stats.rx_errors++;
438 if (status & RxErrFrame)
439 cp->dev->stats.rx_frame_errors++;
440 if (status & RxErrCRC)
441 cp->dev->stats.rx_crc_errors++;
442 if ((status & RxErrRunt) || (status & RxErrLong))
443 cp->dev->stats.rx_length_errors++;
444 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag))
445 cp->dev->stats.rx_length_errors++;
446 if (status & RxErrFIFO)
447 cp->dev->stats.rx_fifo_errors++;
448 }
449
450 static inline unsigned int cp_rx_csum_ok (u32 status)
451 {
452 unsigned int protocol = (status >> 16) & 0x3;
453
454 if (((protocol == RxProtoTCP) && !(status & TCPFail)) ||
455 ((protocol == RxProtoUDP) && !(status & UDPFail)))
456 return 1;
457 else
458 return 0;
459 }
460
461 static int cp_rx_poll(struct napi_struct *napi, int budget)
462 {
463 struct cp_private *cp = container_of(napi, struct cp_private, napi);
464 struct net_device *dev = cp->dev;
465 unsigned int rx_tail = cp->rx_tail;
466 int rx;
467
468 rx_status_loop:
469 rx = 0;
470 cpw16(IntrStatus, cp_rx_intr_mask);
471
472 while (rx < budget) {
473 u32 status, len;
474 dma_addr_t mapping, new_mapping;
475 struct sk_buff *skb, *new_skb;
476 struct cp_desc *desc;
477 const unsigned buflen = cp->rx_buf_sz;
478
479 skb = cp->rx_skb[rx_tail];
480 BUG_ON(!skb);
481
482 desc = &cp->rx_ring[rx_tail];
483 status = le32_to_cpu(desc->opts1);
484 if (status & DescOwn)
485 break;
486
487 len = (status & 0x1fff) - 4;
488 mapping = le64_to_cpu(desc->addr);
489
490 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) {
491 /* we don't support incoming fragmented frames.
492 * instead, we attempt to ensure that the
493 * pre-allocated RX skbs are properly sized such
494 * that RX fragments are never encountered
495 */
496 cp_rx_err_acct(cp, rx_tail, status, len);
497 dev->stats.rx_dropped++;
498 cp->cp_stats.rx_frags++;
499 goto rx_next;
500 }
501
502 if (status & (RxError | RxErrFIFO)) {
503 cp_rx_err_acct(cp, rx_tail, status, len);
504 goto rx_next;
505 }
506
507 netif_dbg(cp, rx_status, dev, "rx slot %d status 0x%x len %d\n",
508 rx_tail, status, len);
509
510 new_skb = napi_alloc_skb(napi, buflen);
511 if (!new_skb) {
512 dev->stats.rx_dropped++;
513 goto rx_next;
514 }
515
516 new_mapping = dma_map_single(&cp->pdev->dev, new_skb->data, buflen,
517 PCI_DMA_FROMDEVICE);
518 if (dma_mapping_error(&cp->pdev->dev, new_mapping)) {
519 dev->stats.rx_dropped++;
520 kfree_skb(new_skb);
521 goto rx_next;
522 }
523
524 dma_unmap_single(&cp->pdev->dev, mapping,
525 buflen, PCI_DMA_FROMDEVICE);
526
527 /* Handle checksum offloading for incoming packets. */
528 if (cp_rx_csum_ok(status))
529 skb->ip_summed = CHECKSUM_UNNECESSARY;
530 else
531 skb_checksum_none_assert(skb);
532
533 skb_put(skb, len);
534
535 cp->rx_skb[rx_tail] = new_skb;
536
537 cp_rx_skb(cp, skb, desc);
538 rx++;
539 mapping = new_mapping;
540
541 rx_next:
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 |
546 cp->rx_buf_sz);
547 else
548 desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
549 rx_tail = NEXT_RX(rx_tail);
550 }
551
552 cp->rx_tail = rx_tail;
553
554 /* if we did not reach work limit, then we're done with
555 * this round of polling
556 */
557 if (rx < budget) {
558 unsigned long flags;
559
560 if (cpr16(IntrStatus) & cp_rx_intr_mask)
561 goto rx_status_loop;
562
563 napi_gro_flush(napi, false);
564 spin_lock_irqsave(&cp->lock, flags);
565 __napi_complete(napi);
566 cpw16_f(IntrMask, cp_intr_mask);
567 spin_unlock_irqrestore(&cp->lock, flags);
568 }
569
570 return rx;
571 }
572
573 static irqreturn_t cp_interrupt (int irq, void *dev_instance)
574 {
575 struct net_device *dev = dev_instance;
576 struct cp_private *cp;
577 int handled = 0;
578 u16 status;
579
580 if (unlikely(dev == NULL))
581 return IRQ_NONE;
582 cp = netdev_priv(dev);
583
584 spin_lock(&cp->lock);
585
586 status = cpr16(IntrStatus);
587 if (!status || (status == 0xFFFF))
588 goto out_unlock;
589
590 handled = 1;
591
592 netif_dbg(cp, intr, dev, "intr, status %04x cmd %02x cpcmd %04x\n",
593 status, cpr8(Cmd), cpr16(CpCmd));
594
595 cpw16(IntrStatus, status & ~cp_rx_intr_mask);
596
597 /* close possible race's with dev_close */
598 if (unlikely(!netif_running(dev))) {
599 cpw16(IntrMask, 0);
600 goto out_unlock;
601 }
602
603 if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
604 if (napi_schedule_prep(&cp->napi)) {
605 cpw16_f(IntrMask, cp_norx_intr_mask);
606 __napi_schedule(&cp->napi);
607 }
608
609 if (status & (TxOK | TxErr | TxEmpty | SWInt))
610 cp_tx(cp);
611 if (status & LinkChg)
612 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
613
614
615 if (status & PciErr) {
616 u16 pci_status;
617
618 pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
619 pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
620 netdev_err(dev, "PCI bus error, status=%04x, PCI status=%04x\n",
621 status, pci_status);
622
623 /* TODO: reset hardware */
624 }
625
626 out_unlock:
627 spin_unlock(&cp->lock);
628
629 return IRQ_RETVAL(handled);
630 }
631
632 #ifdef CONFIG_NET_POLL_CONTROLLER
633 /*
634 * Polling receive - used by netconsole and other diagnostic tools
635 * to allow network i/o with interrupts disabled.
636 */
637 static void cp_poll_controller(struct net_device *dev)
638 {
639 struct cp_private *cp = netdev_priv(dev);
640 const int irq = cp->pdev->irq;
641
642 disable_irq(irq);
643 cp_interrupt(irq, dev);
644 enable_irq(irq);
645 }
646 #endif
647
648 static void cp_tx (struct cp_private *cp)
649 {
650 unsigned tx_head = cp->tx_head;
651 unsigned tx_tail = cp->tx_tail;
652 unsigned bytes_compl = 0, pkts_compl = 0;
653
654 while (tx_tail != tx_head) {
655 struct cp_desc *txd = cp->tx_ring + tx_tail;
656 struct sk_buff *skb;
657 u32 status;
658
659 rmb();
660 status = le32_to_cpu(txd->opts1);
661 if (status & DescOwn)
662 break;
663
664 skb = cp->tx_skb[tx_tail];
665 BUG_ON(!skb);
666
667 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
668 le32_to_cpu(txd->opts1) & 0xffff,
669 PCI_DMA_TODEVICE);
670
671 if (status & LastFrag) {
672 if (status & (TxError | TxFIFOUnder)) {
673 netif_dbg(cp, tx_err, cp->dev,
674 "tx err, status 0x%x\n", status);
675 cp->dev->stats.tx_errors++;
676 if (status & TxOWC)
677 cp->dev->stats.tx_window_errors++;
678 if (status & TxMaxCol)
679 cp->dev->stats.tx_aborted_errors++;
680 if (status & TxLinkFail)
681 cp->dev->stats.tx_carrier_errors++;
682 if (status & TxFIFOUnder)
683 cp->dev->stats.tx_fifo_errors++;
684 } else {
685 cp->dev->stats.collisions +=
686 ((status >> TxColCntShift) & TxColCntMask);
687 cp->dev->stats.tx_packets++;
688 cp->dev->stats.tx_bytes += skb->len;
689 netif_dbg(cp, tx_done, cp->dev,
690 "tx done, slot %d\n", tx_tail);
691 }
692 bytes_compl += skb->len;
693 pkts_compl++;
694 dev_kfree_skb_irq(skb);
695 }
696
697 cp->tx_skb[tx_tail] = NULL;
698
699 tx_tail = NEXT_TX(tx_tail);
700 }
701
702 cp->tx_tail = tx_tail;
703
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);
707 }
708
709 static inline u32 cp_tx_vlan_tag(struct sk_buff *skb)
710 {
711 return skb_vlan_tag_present(skb) ?
712 TxVlanTag | swab16(skb_vlan_tag_get(skb)) : 0x00;
713 }
714
715 static void unwind_tx_frag_mapping(struct cp_private *cp, struct sk_buff *skb,
716 int first, int entry_last)
717 {
718 int frag, index;
719 struct cp_desc *txd;
720 skb_frag_t *this_frag;
721 for (frag = 0; frag+first < entry_last; frag++) {
722 index = first+frag;
723 cp->tx_skb[index] = NULL;
724 txd = &cp->tx_ring[index];
725 this_frag = &skb_shinfo(skb)->frags[frag];
726 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
727 skb_frag_size(this_frag), PCI_DMA_TODEVICE);
728 }
729 }
730
731 static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
732 struct net_device *dev)
733 {
734 struct cp_private *cp = netdev_priv(dev);
735 unsigned entry;
736 u32 eor, flags;
737 unsigned long intr_flags;
738 __le32 opts2;
739 int mss = 0;
740
741 spin_lock_irqsave(&cp->lock, intr_flags);
742
743 /* This is a hard error, log it. */
744 if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) {
745 netif_stop_queue(dev);
746 spin_unlock_irqrestore(&cp->lock, intr_flags);
747 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
748 return NETDEV_TX_BUSY;
749 }
750
751 entry = cp->tx_head;
752 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
753 mss = skb_shinfo(skb)->gso_size;
754
755 opts2 = cpu_to_le32(cp_tx_vlan_tag(skb));
756
757 if (skb_shinfo(skb)->nr_frags == 0) {
758 struct cp_desc *txd = &cp->tx_ring[entry];
759 u32 len;
760 dma_addr_t mapping;
761
762 len = skb->len;
763 mapping = dma_map_single(&cp->pdev->dev, skb->data, len, PCI_DMA_TODEVICE);
764 if (dma_mapping_error(&cp->pdev->dev, mapping))
765 goto out_dma_error;
766
767 txd->opts2 = opts2;
768 txd->addr = cpu_to_le64(mapping);
769 wmb();
770
771 flags = eor | len | DescOwn | FirstFrag | LastFrag;
772
773 if (mss)
774 flags |= LargeSend | ((mss & MSSMask) << MSSShift);
775 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
776 const struct iphdr *ip = ip_hdr(skb);
777 if (ip->protocol == IPPROTO_TCP)
778 flags |= IPCS | TCPCS;
779 else if (ip->protocol == IPPROTO_UDP)
780 flags |= IPCS | UDPCS;
781 else
782 WARN_ON(1); /* we need a WARN() */
783 }
784
785 txd->opts1 = cpu_to_le32(flags);
786 wmb();
787
788 cp->tx_skb[entry] = skb;
789 entry = NEXT_TX(entry);
790 } else {
791 struct cp_desc *txd;
792 u32 first_len, first_eor;
793 dma_addr_t first_mapping;
794 int frag, first_entry = entry;
795 const struct iphdr *ip = ip_hdr(skb);
796
797 /* We must give this initial chunk to the device last.
798 * Otherwise we could race with the device.
799 */
800 first_eor = eor;
801 first_len = skb_headlen(skb);
802 first_mapping = dma_map_single(&cp->pdev->dev, skb->data,
803 first_len, PCI_DMA_TODEVICE);
804 if (dma_mapping_error(&cp->pdev->dev, first_mapping))
805 goto out_dma_error;
806
807 cp->tx_skb[entry] = skb;
808 entry = NEXT_TX(entry);
809
810 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
811 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
812 u32 len;
813 u32 ctrl;
814 dma_addr_t mapping;
815
816 len = skb_frag_size(this_frag);
817 mapping = dma_map_single(&cp->pdev->dev,
818 skb_frag_address(this_frag),
819 len, PCI_DMA_TODEVICE);
820 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
821 unwind_tx_frag_mapping(cp, skb, first_entry, entry);
822 goto out_dma_error;
823 }
824
825 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
826
827 ctrl = eor | len | DescOwn;
828
829 if (mss)
830 ctrl |= LargeSend |
831 ((mss & MSSMask) << MSSShift);
832 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
833 if (ip->protocol == IPPROTO_TCP)
834 ctrl |= IPCS | TCPCS;
835 else if (ip->protocol == IPPROTO_UDP)
836 ctrl |= IPCS | UDPCS;
837 else
838 BUG();
839 }
840
841 if (frag == skb_shinfo(skb)->nr_frags - 1)
842 ctrl |= LastFrag;
843
844 txd = &cp->tx_ring[entry];
845 txd->opts2 = opts2;
846 txd->addr = cpu_to_le64(mapping);
847 wmb();
848
849 txd->opts1 = cpu_to_le32(ctrl);
850 wmb();
851
852 cp->tx_skb[entry] = skb;
853 entry = NEXT_TX(entry);
854 }
855
856 txd = &cp->tx_ring[first_entry];
857 txd->opts2 = opts2;
858 txd->addr = cpu_to_le64(first_mapping);
859 wmb();
860
861 if (skb->ip_summed == CHECKSUM_PARTIAL) {
862 if (ip->protocol == IPPROTO_TCP)
863 txd->opts1 = cpu_to_le32(first_eor | first_len |
864 FirstFrag | DescOwn |
865 IPCS | TCPCS);
866 else if (ip->protocol == IPPROTO_UDP)
867 txd->opts1 = cpu_to_le32(first_eor | first_len |
868 FirstFrag | DescOwn |
869 IPCS | UDPCS);
870 else
871 BUG();
872 } else
873 txd->opts1 = cpu_to_le32(first_eor | first_len |
874 FirstFrag | DescOwn);
875 wmb();
876 }
877 cp->tx_head = entry;
878
879 netdev_sent_queue(dev, skb->len);
880 netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
881 entry, skb->len);
882 if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
883 netif_stop_queue(dev);
884
885 out_unlock:
886 spin_unlock_irqrestore(&cp->lock, intr_flags);
887
888 cpw8(TxPoll, NormalTxPoll);
889
890 return NETDEV_TX_OK;
891 out_dma_error:
892 dev_kfree_skb_any(skb);
893 cp->dev->stats.tx_dropped++;
894 goto out_unlock;
895 }
896
897 /* Set or clear the multicast filter for this adaptor.
898 This routine is not state sensitive and need not be SMP locked. */
899
900 static void __cp_set_rx_mode (struct net_device *dev)
901 {
902 struct cp_private *cp = netdev_priv(dev);
903 u32 mc_filter[2]; /* Multicast hash filter */
904 int rx_mode;
905
906 /* Note: do not reorder, GCC is clever about common statements. */
907 if (dev->flags & IFF_PROMISC) {
908 /* Unconditionally log net taps. */
909 rx_mode =
910 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
911 AcceptAllPhys;
912 mc_filter[1] = mc_filter[0] = 0xffffffff;
913 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
914 (dev->flags & IFF_ALLMULTI)) {
915 /* Too many to filter perfectly -- accept all multicasts. */
916 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
917 mc_filter[1] = mc_filter[0] = 0xffffffff;
918 } else {
919 struct netdev_hw_addr *ha;
920 rx_mode = AcceptBroadcast | AcceptMyPhys;
921 mc_filter[1] = mc_filter[0] = 0;
922 netdev_for_each_mc_addr(ha, dev) {
923 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
924
925 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
926 rx_mode |= AcceptMulticast;
927 }
928 }
929
930 /* We can safely update without stopping the chip. */
931 cp->rx_config = cp_rx_config | rx_mode;
932 cpw32_f(RxConfig, cp->rx_config);
933
934 cpw32_f (MAR0 + 0, mc_filter[0]);
935 cpw32_f (MAR0 + 4, mc_filter[1]);
936 }
937
938 static void cp_set_rx_mode (struct net_device *dev)
939 {
940 unsigned long flags;
941 struct cp_private *cp = netdev_priv(dev);
942
943 spin_lock_irqsave (&cp->lock, flags);
944 __cp_set_rx_mode(dev);
945 spin_unlock_irqrestore (&cp->lock, flags);
946 }
947
948 static void __cp_get_stats(struct cp_private *cp)
949 {
950 /* only lower 24 bits valid; write any value to clear */
951 cp->dev->stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff);
952 cpw32 (RxMissed, 0);
953 }
954
955 static struct net_device_stats *cp_get_stats(struct net_device *dev)
956 {
957 struct cp_private *cp = netdev_priv(dev);
958 unsigned long flags;
959
960 /* The chip only need report frame silently dropped. */
961 spin_lock_irqsave(&cp->lock, flags);
962 if (netif_running(dev) && netif_device_present(dev))
963 __cp_get_stats(cp);
964 spin_unlock_irqrestore(&cp->lock, flags);
965
966 return &dev->stats;
967 }
968
969 static void cp_stop_hw (struct cp_private *cp)
970 {
971 cpw16(IntrStatus, ~(cpr16(IntrStatus)));
972 cpw16_f(IntrMask, 0);
973 cpw8(Cmd, 0);
974 cpw16_f(CpCmd, 0);
975 cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));
976
977 cp->rx_tail = 0;
978 cp->tx_head = cp->tx_tail = 0;
979
980 netdev_reset_queue(cp->dev);
981 }
982
983 static void cp_reset_hw (struct cp_private *cp)
984 {
985 unsigned work = 1000;
986
987 cpw8(Cmd, CmdReset);
988
989 while (work--) {
990 if (!(cpr8(Cmd) & CmdReset))
991 return;
992
993 schedule_timeout_uninterruptible(10);
994 }
995
996 netdev_err(cp->dev, "hardware reset timeout\n");
997 }
998
999 static inline void cp_start_hw (struct cp_private *cp)
1000 {
1001 dma_addr_t ring_dma;
1002
1003 cpw16(CpCmd, cp->cpcmd);
1004
1005 /*
1006 * These (at least TxRingAddr) need to be configured after the
1007 * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
1008 * (C+ Command Register) recommends that these and more be configured
1009 * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
1010 * it's been observed that the TxRingAddr is actually reset to garbage
1011 * when C+ mode Tx is enabled in CpCmd.
1012 */
1013 cpw32_f(HiTxRingAddr, 0);
1014 cpw32_f(HiTxRingAddr + 4, 0);
1015
1016 ring_dma = cp->ring_dma;
1017 cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
1018 cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
1019
1020 ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
1021 cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
1022 cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
1023
1024 /*
1025 * Strictly speaking, the datasheet says this should be enabled
1026 * *before* setting the descriptor addresses. But what, then, would
1027 * prevent it from doing DMA to random unconfigured addresses?
1028 * This variant appears to work fine.
1029 */
1030 cpw8(Cmd, RxOn | TxOn);
1031
1032 netdev_reset_queue(cp->dev);
1033 }
1034
1035 static void cp_enable_irq(struct cp_private *cp)
1036 {
1037 cpw16_f(IntrMask, cp_intr_mask);
1038 }
1039
1040 static void cp_init_hw (struct cp_private *cp)
1041 {
1042 struct net_device *dev = cp->dev;
1043
1044 cp_reset_hw(cp);
1045
1046 cpw8_f (Cfg9346, Cfg9346_Unlock);
1047
1048 /* Restore our idea of the MAC address. */
1049 cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1050 cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1051
1052 cp_start_hw(cp);
1053 cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
1054
1055 __cp_set_rx_mode(dev);
1056 cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift));
1057
1058 cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable);
1059 /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */
1060 cpw8(Config3, PARMEnable);
1061 cp->wol_enabled = 0;
1062
1063 cpw8(Config5, cpr8(Config5) & PMEStatus);
1064
1065 cpw16(MultiIntr, 0);
1066
1067 cpw8_f(Cfg9346, Cfg9346_Lock);
1068 }
1069
1070 static int cp_refill_rx(struct cp_private *cp)
1071 {
1072 struct net_device *dev = cp->dev;
1073 unsigned i;
1074
1075 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1076 struct sk_buff *skb;
1077 dma_addr_t mapping;
1078
1079 skb = netdev_alloc_skb_ip_align(dev, cp->rx_buf_sz);
1080 if (!skb)
1081 goto err_out;
1082
1083 mapping = dma_map_single(&cp->pdev->dev, skb->data,
1084 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1085 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
1086 kfree_skb(skb);
1087 goto err_out;
1088 }
1089 cp->rx_skb[i] = skb;
1090
1091 cp->rx_ring[i].opts2 = 0;
1092 cp->rx_ring[i].addr = cpu_to_le64(mapping);
1093 if (i == (CP_RX_RING_SIZE - 1))
1094 cp->rx_ring[i].opts1 =
1095 cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz);
1096 else
1097 cp->rx_ring[i].opts1 =
1098 cpu_to_le32(DescOwn | cp->rx_buf_sz);
1099 }
1100
1101 return 0;
1102
1103 err_out:
1104 cp_clean_rings(cp);
1105 return -ENOMEM;
1106 }
1107
1108 static void cp_init_rings_index (struct cp_private *cp)
1109 {
1110 cp->rx_tail = 0;
1111 cp->tx_head = cp->tx_tail = 0;
1112 }
1113
1114 static int cp_init_rings (struct cp_private *cp)
1115 {
1116 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1117 cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
1118
1119 cp_init_rings_index(cp);
1120
1121 return cp_refill_rx (cp);
1122 }
1123
1124 static int cp_alloc_rings (struct cp_private *cp)
1125 {
1126 struct device *d = &cp->pdev->dev;
1127 void *mem;
1128 int rc;
1129
1130 mem = dma_alloc_coherent(d, CP_RING_BYTES, &cp->ring_dma, GFP_KERNEL);
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 rc = cp_init_rings(cp);
1138 if (rc < 0)
1139 dma_free_coherent(d, CP_RING_BYTES, cp->rx_ring, cp->ring_dma);
1140
1141 return rc;
1142 }
1143
1144 static void cp_clean_rings (struct cp_private *cp)
1145 {
1146 struct cp_desc *desc;
1147 unsigned i;
1148
1149 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1150 if (cp->rx_skb[i]) {
1151 desc = cp->rx_ring + i;
1152 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1153 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1154 dev_kfree_skb_any(cp->rx_skb[i]);
1155 }
1156 }
1157
1158 for (i = 0; i < CP_TX_RING_SIZE; i++) {
1159 if (cp->tx_skb[i]) {
1160 struct sk_buff *skb = cp->tx_skb[i];
1161
1162 desc = cp->tx_ring + i;
1163 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1164 le32_to_cpu(desc->opts1) & 0xffff,
1165 PCI_DMA_TODEVICE);
1166 if (le32_to_cpu(desc->opts1) & LastFrag)
1167 dev_kfree_skb_any(skb);
1168 cp->dev->stats.tx_dropped++;
1169 }
1170 }
1171 netdev_reset_queue(cp->dev);
1172
1173 memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
1174 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1175
1176 memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE);
1177 memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE);
1178 }
1179
1180 static void cp_free_rings (struct cp_private *cp)
1181 {
1182 cp_clean_rings(cp);
1183 dma_free_coherent(&cp->pdev->dev, CP_RING_BYTES, cp->rx_ring,
1184 cp->ring_dma);
1185 cp->rx_ring = NULL;
1186 cp->tx_ring = NULL;
1187 }
1188
1189 static int cp_open (struct net_device *dev)
1190 {
1191 struct cp_private *cp = netdev_priv(dev);
1192 const int irq = cp->pdev->irq;
1193 int rc;
1194
1195 netif_dbg(cp, ifup, dev, "enabling interface\n");
1196
1197 rc = cp_alloc_rings(cp);
1198 if (rc)
1199 return rc;
1200
1201 napi_enable(&cp->napi);
1202
1203 cp_init_hw(cp);
1204
1205 rc = request_irq(irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
1206 if (rc)
1207 goto err_out_hw;
1208
1209 cp_enable_irq(cp);
1210
1211 netif_carrier_off(dev);
1212 mii_check_media(&cp->mii_if, netif_msg_link(cp), true);
1213 netif_start_queue(dev);
1214
1215 return 0;
1216
1217 err_out_hw:
1218 napi_disable(&cp->napi);
1219 cp_stop_hw(cp);
1220 cp_free_rings(cp);
1221 return rc;
1222 }
1223
1224 static int cp_close (struct net_device *dev)
1225 {
1226 struct cp_private *cp = netdev_priv(dev);
1227 unsigned long flags;
1228
1229 napi_disable(&cp->napi);
1230
1231 netif_dbg(cp, ifdown, dev, "disabling interface\n");
1232
1233 spin_lock_irqsave(&cp->lock, flags);
1234
1235 netif_stop_queue(dev);
1236 netif_carrier_off(dev);
1237
1238 cp_stop_hw(cp);
1239
1240 spin_unlock_irqrestore(&cp->lock, flags);
1241
1242 free_irq(cp->pdev->irq, dev);
1243
1244 cp_free_rings(cp);
1245 return 0;
1246 }
1247
1248 static void cp_tx_timeout(struct net_device *dev)
1249 {
1250 struct cp_private *cp = netdev_priv(dev);
1251 unsigned long flags;
1252 int rc;
1253
1254 netdev_warn(dev, "Transmit timeout, status %2x %4x %4x %4x\n",
1255 cpr8(Cmd), cpr16(CpCmd),
1256 cpr16(IntrStatus), cpr16(IntrMask));
1257
1258 spin_lock_irqsave(&cp->lock, flags);
1259
1260 cp_stop_hw(cp);
1261 cp_clean_rings(cp);
1262 rc = cp_init_rings(cp);
1263 cp_start_hw(cp);
1264 __cp_set_rx_mode(dev);
1265 cpw16_f(IntrMask, cp_norx_intr_mask);
1266
1267 netif_wake_queue(dev);
1268 napi_schedule_irqoff(&cp->napi);
1269
1270 spin_unlock_irqrestore(&cp->lock, flags);
1271 }
1272
1273 static int cp_change_mtu(struct net_device *dev, int new_mtu)
1274 {
1275 struct cp_private *cp = netdev_priv(dev);
1276
1277 /* check for invalid MTU, according to hardware limits */
1278 if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU)
1279 return -EINVAL;
1280
1281 /* if network interface not up, no need for complexity */
1282 if (!netif_running(dev)) {
1283 dev->mtu = new_mtu;
1284 cp_set_rxbufsize(cp); /* set new rx buf size */
1285 return 0;
1286 }
1287
1288 /* network IS up, close it, reset MTU, and come up again. */
1289 cp_close(dev);
1290 dev->mtu = new_mtu;
1291 cp_set_rxbufsize(cp);
1292 return cp_open(dev);
1293 }
1294
1295 static const char mii_2_8139_map[8] = {
1296 BasicModeCtrl,
1297 BasicModeStatus,
1298 0,
1299 0,
1300 NWayAdvert,
1301 NWayLPAR,
1302 NWayExpansion,
1303 0
1304 };
1305
1306 static int mdio_read(struct net_device *dev, int phy_id, int location)
1307 {
1308 struct cp_private *cp = netdev_priv(dev);
1309
1310 return location < 8 && mii_2_8139_map[location] ?
1311 readw(cp->regs + mii_2_8139_map[location]) : 0;
1312 }
1313
1314
1315 static void mdio_write(struct net_device *dev, int phy_id, int location,
1316 int value)
1317 {
1318 struct cp_private *cp = netdev_priv(dev);
1319
1320 if (location == 0) {
1321 cpw8(Cfg9346, Cfg9346_Unlock);
1322 cpw16(BasicModeCtrl, value);
1323 cpw8(Cfg9346, Cfg9346_Lock);
1324 } else if (location < 8 && mii_2_8139_map[location])
1325 cpw16(mii_2_8139_map[location], value);
1326 }
1327
1328 /* Set the ethtool Wake-on-LAN settings */
1329 static int netdev_set_wol (struct cp_private *cp,
1330 const struct ethtool_wolinfo *wol)
1331 {
1332 u8 options;
1333
1334 options = cpr8 (Config3) & ~(LinkUp | MagicPacket);
1335 /* If WOL is being disabled, no need for complexity */
1336 if (wol->wolopts) {
1337 if (wol->wolopts & WAKE_PHY) options |= LinkUp;
1338 if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket;
1339 }
1340
1341 cpw8 (Cfg9346, Cfg9346_Unlock);
1342 cpw8 (Config3, options);
1343 cpw8 (Cfg9346, Cfg9346_Lock);
1344
1345 options = 0; /* Paranoia setting */
1346 options = cpr8 (Config5) & ~(UWF | MWF | BWF);
1347 /* If WOL is being disabled, no need for complexity */
1348 if (wol->wolopts) {
1349 if (wol->wolopts & WAKE_UCAST) options |= UWF;
1350 if (wol->wolopts & WAKE_BCAST) options |= BWF;
1351 if (wol->wolopts & WAKE_MCAST) options |= MWF;
1352 }
1353
1354 cpw8 (Config5, options);
1355
1356 cp->wol_enabled = (wol->wolopts) ? 1 : 0;
1357
1358 return 0;
1359 }
1360
1361 /* Get the ethtool Wake-on-LAN settings */
1362 static void netdev_get_wol (struct cp_private *cp,
1363 struct ethtool_wolinfo *wol)
1364 {
1365 u8 options;
1366
1367 wol->wolopts = 0; /* Start from scratch */
1368 wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC |
1369 WAKE_MCAST | WAKE_UCAST;
1370 /* We don't need to go on if WOL is disabled */
1371 if (!cp->wol_enabled) return;
1372
1373 options = cpr8 (Config3);
1374 if (options & LinkUp) wol->wolopts |= WAKE_PHY;
1375 if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC;
1376
1377 options = 0; /* Paranoia setting */
1378 options = cpr8 (Config5);
1379 if (options & UWF) wol->wolopts |= WAKE_UCAST;
1380 if (options & BWF) wol->wolopts |= WAKE_BCAST;
1381 if (options & MWF) wol->wolopts |= WAKE_MCAST;
1382 }
1383
1384 static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1385 {
1386 struct cp_private *cp = netdev_priv(dev);
1387
1388 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1389 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1390 strlcpy(info->bus_info, pci_name(cp->pdev), sizeof(info->bus_info));
1391 }
1392
1393 static void cp_get_ringparam(struct net_device *dev,
1394 struct ethtool_ringparam *ring)
1395 {
1396 ring->rx_max_pending = CP_RX_RING_SIZE;
1397 ring->tx_max_pending = CP_TX_RING_SIZE;
1398 ring->rx_pending = CP_RX_RING_SIZE;
1399 ring->tx_pending = CP_TX_RING_SIZE;
1400 }
1401
1402 static int cp_get_regs_len(struct net_device *dev)
1403 {
1404 return CP_REGS_SIZE;
1405 }
1406
1407 static int cp_get_sset_count (struct net_device *dev, int sset)
1408 {
1409 switch (sset) {
1410 case ETH_SS_STATS:
1411 return CP_NUM_STATS;
1412 default:
1413 return -EOPNOTSUPP;
1414 }
1415 }
1416
1417 static int cp_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1418 {
1419 struct cp_private *cp = netdev_priv(dev);
1420 int rc;
1421 unsigned long flags;
1422
1423 spin_lock_irqsave(&cp->lock, flags);
1424 rc = mii_ethtool_gset(&cp->mii_if, cmd);
1425 spin_unlock_irqrestore(&cp->lock, flags);
1426
1427 return rc;
1428 }
1429
1430 static int cp_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1431 {
1432 struct cp_private *cp = netdev_priv(dev);
1433 int rc;
1434 unsigned long flags;
1435
1436 spin_lock_irqsave(&cp->lock, flags);
1437 rc = mii_ethtool_sset(&cp->mii_if, cmd);
1438 spin_unlock_irqrestore(&cp->lock, flags);
1439
1440 return rc;
1441 }
1442
1443 static int cp_nway_reset(struct net_device *dev)
1444 {
1445 struct cp_private *cp = netdev_priv(dev);
1446 return mii_nway_restart(&cp->mii_if);
1447 }
1448
1449 static u32 cp_get_msglevel(struct net_device *dev)
1450 {
1451 struct cp_private *cp = netdev_priv(dev);
1452 return cp->msg_enable;
1453 }
1454
1455 static void cp_set_msglevel(struct net_device *dev, u32 value)
1456 {
1457 struct cp_private *cp = netdev_priv(dev);
1458 cp->msg_enable = value;
1459 }
1460
1461 static int cp_set_features(struct net_device *dev, netdev_features_t features)
1462 {
1463 struct cp_private *cp = netdev_priv(dev);
1464 unsigned long flags;
1465
1466 if (!((dev->features ^ features) & NETIF_F_RXCSUM))
1467 return 0;
1468
1469 spin_lock_irqsave(&cp->lock, flags);
1470
1471 if (features & NETIF_F_RXCSUM)
1472 cp->cpcmd |= RxChkSum;
1473 else
1474 cp->cpcmd &= ~RxChkSum;
1475
1476 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1477 cp->cpcmd |= RxVlanOn;
1478 else
1479 cp->cpcmd &= ~RxVlanOn;
1480
1481 cpw16_f(CpCmd, cp->cpcmd);
1482 spin_unlock_irqrestore(&cp->lock, flags);
1483
1484 return 0;
1485 }
1486
1487 static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1488 void *p)
1489 {
1490 struct cp_private *cp = netdev_priv(dev);
1491 unsigned long flags;
1492
1493 if (regs->len < CP_REGS_SIZE)
1494 return /* -EINVAL */;
1495
1496 regs->version = CP_REGS_VER;
1497
1498 spin_lock_irqsave(&cp->lock, flags);
1499 memcpy_fromio(p, cp->regs, CP_REGS_SIZE);
1500 spin_unlock_irqrestore(&cp->lock, flags);
1501 }
1502
1503 static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1504 {
1505 struct cp_private *cp = netdev_priv(dev);
1506 unsigned long flags;
1507
1508 spin_lock_irqsave (&cp->lock, flags);
1509 netdev_get_wol (cp, wol);
1510 spin_unlock_irqrestore (&cp->lock, flags);
1511 }
1512
1513 static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1514 {
1515 struct cp_private *cp = netdev_priv(dev);
1516 unsigned long flags;
1517 int rc;
1518
1519 spin_lock_irqsave (&cp->lock, flags);
1520 rc = netdev_set_wol (cp, wol);
1521 spin_unlock_irqrestore (&cp->lock, flags);
1522
1523 return rc;
1524 }
1525
1526 static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf)
1527 {
1528 switch (stringset) {
1529 case ETH_SS_STATS:
1530 memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
1531 break;
1532 default:
1533 BUG();
1534 break;
1535 }
1536 }
1537
1538 static void cp_get_ethtool_stats (struct net_device *dev,
1539 struct ethtool_stats *estats, u64 *tmp_stats)
1540 {
1541 struct cp_private *cp = netdev_priv(dev);
1542 struct cp_dma_stats *nic_stats;
1543 dma_addr_t dma;
1544 int i;
1545
1546 nic_stats = dma_alloc_coherent(&cp->pdev->dev, sizeof(*nic_stats),
1547 &dma, GFP_KERNEL);
1548 if (!nic_stats)
1549 return;
1550
1551 /* begin NIC statistics dump */
1552 cpw32(StatsAddr + 4, (u64)dma >> 32);
1553 cpw32(StatsAddr, ((u64)dma & DMA_BIT_MASK(32)) | DumpStats);
1554 cpr32(StatsAddr);
1555
1556 for (i = 0; i < 1000; i++) {
1557 if ((cpr32(StatsAddr) & DumpStats) == 0)
1558 break;
1559 udelay(10);
1560 }
1561 cpw32(StatsAddr, 0);
1562 cpw32(StatsAddr + 4, 0);
1563 cpr32(StatsAddr);
1564
1565 i = 0;
1566 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_ok);
1567 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok);
1568 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_err);
1569 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_err);
1570 tmp_stats[i++] = le16_to_cpu(nic_stats->rx_fifo);
1571 tmp_stats[i++] = le16_to_cpu(nic_stats->frame_align);
1572 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_1col);
1573 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_mcol);
1574 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_phys);
1575 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_bcast);
1576 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_ok_mcast);
1577 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_abort);
1578 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_underrun);
1579 tmp_stats[i++] = cp->cp_stats.rx_frags;
1580 BUG_ON(i != CP_NUM_STATS);
1581
1582 dma_free_coherent(&cp->pdev->dev, sizeof(*nic_stats), nic_stats, dma);
1583 }
1584
1585 static const struct ethtool_ops cp_ethtool_ops = {
1586 .get_drvinfo = cp_get_drvinfo,
1587 .get_regs_len = cp_get_regs_len,
1588 .get_sset_count = cp_get_sset_count,
1589 .get_settings = cp_get_settings,
1590 .set_settings = cp_set_settings,
1591 .nway_reset = cp_nway_reset,
1592 .get_link = ethtool_op_get_link,
1593 .get_msglevel = cp_get_msglevel,
1594 .set_msglevel = cp_set_msglevel,
1595 .get_regs = cp_get_regs,
1596 .get_wol = cp_get_wol,
1597 .set_wol = cp_set_wol,
1598 .get_strings = cp_get_strings,
1599 .get_ethtool_stats = cp_get_ethtool_stats,
1600 .get_eeprom_len = cp_get_eeprom_len,
1601 .get_eeprom = cp_get_eeprom,
1602 .set_eeprom = cp_set_eeprom,
1603 .get_ringparam = cp_get_ringparam,
1604 };
1605
1606 static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1607 {
1608 struct cp_private *cp = netdev_priv(dev);
1609 int rc;
1610 unsigned long flags;
1611
1612 if (!netif_running(dev))
1613 return -EINVAL;
1614
1615 spin_lock_irqsave(&cp->lock, flags);
1616 rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL);
1617 spin_unlock_irqrestore(&cp->lock, flags);
1618 return rc;
1619 }
1620
1621 static int cp_set_mac_address(struct net_device *dev, void *p)
1622 {
1623 struct cp_private *cp = netdev_priv(dev);
1624 struct sockaddr *addr = p;
1625
1626 if (!is_valid_ether_addr(addr->sa_data))
1627 return -EADDRNOTAVAIL;
1628
1629 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1630
1631 spin_lock_irq(&cp->lock);
1632
1633 cpw8_f(Cfg9346, Cfg9346_Unlock);
1634 cpw32_f(MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1635 cpw32_f(MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1636 cpw8_f(Cfg9346, Cfg9346_Lock);
1637
1638 spin_unlock_irq(&cp->lock);
1639
1640 return 0;
1641 }
1642
1643 /* Serial EEPROM section. */
1644
1645 /* EEPROM_Ctrl bits. */
1646 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1647 #define EE_CS 0x08 /* EEPROM chip select. */
1648 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1649 #define EE_WRITE_0 0x00
1650 #define EE_WRITE_1 0x02
1651 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1652 #define EE_ENB (0x80 | EE_CS)
1653
1654 /* Delay between EEPROM clock transitions.
1655 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1656 */
1657
1658 #define eeprom_delay() readb(ee_addr)
1659
1660 /* The EEPROM commands include the alway-set leading bit. */
1661 #define EE_EXTEND_CMD (4)
1662 #define EE_WRITE_CMD (5)
1663 #define EE_READ_CMD (6)
1664 #define EE_ERASE_CMD (7)
1665
1666 #define EE_EWDS_ADDR (0)
1667 #define EE_WRAL_ADDR (1)
1668 #define EE_ERAL_ADDR (2)
1669 #define EE_EWEN_ADDR (3)
1670
1671 #define CP_EEPROM_MAGIC PCI_DEVICE_ID_REALTEK_8139
1672
1673 static void eeprom_cmd_start(void __iomem *ee_addr)
1674 {
1675 writeb (EE_ENB & ~EE_CS, ee_addr);
1676 writeb (EE_ENB, ee_addr);
1677 eeprom_delay ();
1678 }
1679
1680 static void eeprom_cmd(void __iomem *ee_addr, int cmd, int cmd_len)
1681 {
1682 int i;
1683
1684 /* Shift the command bits out. */
1685 for (i = cmd_len - 1; i >= 0; i--) {
1686 int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1687 writeb (EE_ENB | dataval, ee_addr);
1688 eeprom_delay ();
1689 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1690 eeprom_delay ();
1691 }
1692 writeb (EE_ENB, ee_addr);
1693 eeprom_delay ();
1694 }
1695
1696 static void eeprom_cmd_end(void __iomem *ee_addr)
1697 {
1698 writeb(0, ee_addr);
1699 eeprom_delay ();
1700 }
1701
1702 static void eeprom_extend_cmd(void __iomem *ee_addr, int extend_cmd,
1703 int addr_len)
1704 {
1705 int cmd = (EE_EXTEND_CMD << addr_len) | (extend_cmd << (addr_len - 2));
1706
1707 eeprom_cmd_start(ee_addr);
1708 eeprom_cmd(ee_addr, cmd, 3 + addr_len);
1709 eeprom_cmd_end(ee_addr);
1710 }
1711
1712 static u16 read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1713 {
1714 int i;
1715 u16 retval = 0;
1716 void __iomem *ee_addr = ioaddr + Cfg9346;
1717 int read_cmd = location | (EE_READ_CMD << addr_len);
1718
1719 eeprom_cmd_start(ee_addr);
1720 eeprom_cmd(ee_addr, read_cmd, 3 + addr_len);
1721
1722 for (i = 16; i > 0; i--) {
1723 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
1724 eeprom_delay ();
1725 retval =
1726 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
1727 0);
1728 writeb (EE_ENB, ee_addr);
1729 eeprom_delay ();
1730 }
1731
1732 eeprom_cmd_end(ee_addr);
1733
1734 return retval;
1735 }
1736
1737 static void write_eeprom(void __iomem *ioaddr, int location, u16 val,
1738 int addr_len)
1739 {
1740 int i;
1741 void __iomem *ee_addr = ioaddr + Cfg9346;
1742 int write_cmd = location | (EE_WRITE_CMD << addr_len);
1743
1744 eeprom_extend_cmd(ee_addr, EE_EWEN_ADDR, addr_len);
1745
1746 eeprom_cmd_start(ee_addr);
1747 eeprom_cmd(ee_addr, write_cmd, 3 + addr_len);
1748 eeprom_cmd(ee_addr, val, 16);
1749 eeprom_cmd_end(ee_addr);
1750
1751 eeprom_cmd_start(ee_addr);
1752 for (i = 0; i < 20000; i++)
1753 if (readb(ee_addr) & EE_DATA_READ)
1754 break;
1755 eeprom_cmd_end(ee_addr);
1756
1757 eeprom_extend_cmd(ee_addr, EE_EWDS_ADDR, addr_len);
1758 }
1759
1760 static int cp_get_eeprom_len(struct net_device *dev)
1761 {
1762 struct cp_private *cp = netdev_priv(dev);
1763 int size;
1764
1765 spin_lock_irq(&cp->lock);
1766 size = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 256 : 128;
1767 spin_unlock_irq(&cp->lock);
1768
1769 return size;
1770 }
1771
1772 static int cp_get_eeprom(struct net_device *dev,
1773 struct ethtool_eeprom *eeprom, u8 *data)
1774 {
1775 struct cp_private *cp = netdev_priv(dev);
1776 unsigned int addr_len;
1777 u16 val;
1778 u32 offset = eeprom->offset >> 1;
1779 u32 len = eeprom->len;
1780 u32 i = 0;
1781
1782 eeprom->magic = CP_EEPROM_MAGIC;
1783
1784 spin_lock_irq(&cp->lock);
1785
1786 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1787
1788 if (eeprom->offset & 1) {
1789 val = read_eeprom(cp->regs, offset, addr_len);
1790 data[i++] = (u8)(val >> 8);
1791 offset++;
1792 }
1793
1794 while (i < len - 1) {
1795 val = read_eeprom(cp->regs, offset, addr_len);
1796 data[i++] = (u8)val;
1797 data[i++] = (u8)(val >> 8);
1798 offset++;
1799 }
1800
1801 if (i < len) {
1802 val = read_eeprom(cp->regs, offset, addr_len);
1803 data[i] = (u8)val;
1804 }
1805
1806 spin_unlock_irq(&cp->lock);
1807 return 0;
1808 }
1809
1810 static int cp_set_eeprom(struct net_device *dev,
1811 struct ethtool_eeprom *eeprom, u8 *data)
1812 {
1813 struct cp_private *cp = netdev_priv(dev);
1814 unsigned int addr_len;
1815 u16 val;
1816 u32 offset = eeprom->offset >> 1;
1817 u32 len = eeprom->len;
1818 u32 i = 0;
1819
1820 if (eeprom->magic != CP_EEPROM_MAGIC)
1821 return -EINVAL;
1822
1823 spin_lock_irq(&cp->lock);
1824
1825 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1826
1827 if (eeprom->offset & 1) {
1828 val = read_eeprom(cp->regs, offset, addr_len) & 0xff;
1829 val |= (u16)data[i++] << 8;
1830 write_eeprom(cp->regs, offset, val, addr_len);
1831 offset++;
1832 }
1833
1834 while (i < len - 1) {
1835 val = (u16)data[i++];
1836 val |= (u16)data[i++] << 8;
1837 write_eeprom(cp->regs, offset, val, addr_len);
1838 offset++;
1839 }
1840
1841 if (i < len) {
1842 val = read_eeprom(cp->regs, offset, addr_len) & 0xff00;
1843 val |= (u16)data[i];
1844 write_eeprom(cp->regs, offset, val, addr_len);
1845 }
1846
1847 spin_unlock_irq(&cp->lock);
1848 return 0;
1849 }
1850
1851 /* Put the board into D3cold state and wait for WakeUp signal */
1852 static void cp_set_d3_state (struct cp_private *cp)
1853 {
1854 pci_enable_wake(cp->pdev, PCI_D0, 1); /* Enable PME# generation */
1855 pci_set_power_state (cp->pdev, PCI_D3hot);
1856 }
1857
1858 static const struct net_device_ops cp_netdev_ops = {
1859 .ndo_open = cp_open,
1860 .ndo_stop = cp_close,
1861 .ndo_validate_addr = eth_validate_addr,
1862 .ndo_set_mac_address = cp_set_mac_address,
1863 .ndo_set_rx_mode = cp_set_rx_mode,
1864 .ndo_get_stats = cp_get_stats,
1865 .ndo_do_ioctl = cp_ioctl,
1866 .ndo_start_xmit = cp_start_xmit,
1867 .ndo_tx_timeout = cp_tx_timeout,
1868 .ndo_set_features = cp_set_features,
1869 .ndo_change_mtu = cp_change_mtu,
1870
1871 #ifdef CONFIG_NET_POLL_CONTROLLER
1872 .ndo_poll_controller = cp_poll_controller,
1873 #endif
1874 };
1875
1876 static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1877 {
1878 struct net_device *dev;
1879 struct cp_private *cp;
1880 int rc;
1881 void __iomem *regs;
1882 resource_size_t pciaddr;
1883 unsigned int addr_len, i, pci_using_dac;
1884
1885 pr_info_once("%s", version);
1886
1887 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
1888 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision < 0x20) {
1889 dev_info(&pdev->dev,
1890 "This (id %04x:%04x rev %02x) is not an 8139C+ compatible chip, use 8139too\n",
1891 pdev->vendor, pdev->device, pdev->revision);
1892 return -ENODEV;
1893 }
1894
1895 dev = alloc_etherdev(sizeof(struct cp_private));
1896 if (!dev)
1897 return -ENOMEM;
1898 SET_NETDEV_DEV(dev, &pdev->dev);
1899
1900 cp = netdev_priv(dev);
1901 cp->pdev = pdev;
1902 cp->dev = dev;
1903 cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug);
1904 spin_lock_init (&cp->lock);
1905 cp->mii_if.dev = dev;
1906 cp->mii_if.mdio_read = mdio_read;
1907 cp->mii_if.mdio_write = mdio_write;
1908 cp->mii_if.phy_id = CP_INTERNAL_PHY;
1909 cp->mii_if.phy_id_mask = 0x1f;
1910 cp->mii_if.reg_num_mask = 0x1f;
1911 cp_set_rxbufsize(cp);
1912
1913 rc = pci_enable_device(pdev);
1914 if (rc)
1915 goto err_out_free;
1916
1917 rc = pci_set_mwi(pdev);
1918 if (rc)
1919 goto err_out_disable;
1920
1921 rc = pci_request_regions(pdev, DRV_NAME);
1922 if (rc)
1923 goto err_out_mwi;
1924
1925 pciaddr = pci_resource_start(pdev, 1);
1926 if (!pciaddr) {
1927 rc = -EIO;
1928 dev_err(&pdev->dev, "no MMIO resource\n");
1929 goto err_out_res;
1930 }
1931 if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) {
1932 rc = -EIO;
1933 dev_err(&pdev->dev, "MMIO resource (%llx) too small\n",
1934 (unsigned long long)pci_resource_len(pdev, 1));
1935 goto err_out_res;
1936 }
1937
1938 /* Configure DMA attributes. */
1939 if ((sizeof(dma_addr_t) > 4) &&
1940 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) &&
1941 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
1942 pci_using_dac = 1;
1943 } else {
1944 pci_using_dac = 0;
1945
1946 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1947 if (rc) {
1948 dev_err(&pdev->dev,
1949 "No usable DMA configuration, aborting\n");
1950 goto err_out_res;
1951 }
1952 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1953 if (rc) {
1954 dev_err(&pdev->dev,
1955 "No usable consistent DMA configuration, aborting\n");
1956 goto err_out_res;
1957 }
1958 }
1959
1960 cp->cpcmd = (pci_using_dac ? PCIDAC : 0) |
1961 PCIMulRW | RxChkSum | CpRxOn | CpTxOn;
1962
1963 dev->features |= NETIF_F_RXCSUM;
1964 dev->hw_features |= NETIF_F_RXCSUM;
1965
1966 regs = ioremap(pciaddr, CP_REGS_SIZE);
1967 if (!regs) {
1968 rc = -EIO;
1969 dev_err(&pdev->dev, "Cannot map PCI MMIO (%Lx@%Lx)\n",
1970 (unsigned long long)pci_resource_len(pdev, 1),
1971 (unsigned long long)pciaddr);
1972 goto err_out_res;
1973 }
1974 cp->regs = regs;
1975
1976 cp_stop_hw(cp);
1977
1978 /* read MAC address from EEPROM */
1979 addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6;
1980 for (i = 0; i < 3; i++)
1981 ((__le16 *) (dev->dev_addr))[i] =
1982 cpu_to_le16(read_eeprom (regs, i + 7, addr_len));
1983
1984 dev->netdev_ops = &cp_netdev_ops;
1985 netif_napi_add(dev, &cp->napi, cp_rx_poll, 16);
1986 dev->ethtool_ops = &cp_ethtool_ops;
1987 dev->watchdog_timeo = TX_TIMEOUT;
1988
1989 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
1990
1991 if (pci_using_dac)
1992 dev->features |= NETIF_F_HIGHDMA;
1993
1994 /* disabled by default until verified */
1995 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1996 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
1997 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1998 NETIF_F_HIGHDMA;
1999
2000 rc = register_netdev(dev);
2001 if (rc)
2002 goto err_out_iomap;
2003
2004 netdev_info(dev, "RTL-8139C+ at 0x%p, %pM, IRQ %d\n",
2005 regs, dev->dev_addr, pdev->irq);
2006
2007 pci_set_drvdata(pdev, dev);
2008
2009 /* enable busmastering and memory-write-invalidate */
2010 pci_set_master(pdev);
2011
2012 if (cp->wol_enabled)
2013 cp_set_d3_state (cp);
2014
2015 return 0;
2016
2017 err_out_iomap:
2018 iounmap(regs);
2019 err_out_res:
2020 pci_release_regions(pdev);
2021 err_out_mwi:
2022 pci_clear_mwi(pdev);
2023 err_out_disable:
2024 pci_disable_device(pdev);
2025 err_out_free:
2026 free_netdev(dev);
2027 return rc;
2028 }
2029
2030 static void cp_remove_one (struct pci_dev *pdev)
2031 {
2032 struct net_device *dev = pci_get_drvdata(pdev);
2033 struct cp_private *cp = netdev_priv(dev);
2034
2035 unregister_netdev(dev);
2036 iounmap(cp->regs);
2037 if (cp->wol_enabled)
2038 pci_set_power_state (pdev, PCI_D0);
2039 pci_release_regions(pdev);
2040 pci_clear_mwi(pdev);
2041 pci_disable_device(pdev);
2042 free_netdev(dev);
2043 }
2044
2045 #ifdef CONFIG_PM
2046 static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
2047 {
2048 struct net_device *dev = pci_get_drvdata(pdev);
2049 struct cp_private *cp = netdev_priv(dev);
2050 unsigned long flags;
2051
2052 if (!netif_running(dev))
2053 return 0;
2054
2055 netif_device_detach (dev);
2056 netif_stop_queue (dev);
2057
2058 spin_lock_irqsave (&cp->lock, flags);
2059
2060 /* Disable Rx and Tx */
2061 cpw16 (IntrMask, 0);
2062 cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn));
2063
2064 spin_unlock_irqrestore (&cp->lock, flags);
2065
2066 pci_save_state(pdev);
2067 pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
2068 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2069
2070 return 0;
2071 }
2072
2073 static int cp_resume (struct pci_dev *pdev)
2074 {
2075 struct net_device *dev = pci_get_drvdata (pdev);
2076 struct cp_private *cp = netdev_priv(dev);
2077 unsigned long flags;
2078
2079 if (!netif_running(dev))
2080 return 0;
2081
2082 netif_device_attach (dev);
2083
2084 pci_set_power_state(pdev, PCI_D0);
2085 pci_restore_state(pdev);
2086 pci_enable_wake(pdev, PCI_D0, 0);
2087
2088 /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
2089 cp_init_rings_index (cp);
2090 cp_init_hw (cp);
2091 cp_enable_irq(cp);
2092 netif_start_queue (dev);
2093
2094 spin_lock_irqsave (&cp->lock, flags);
2095
2096 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
2097
2098 spin_unlock_irqrestore (&cp->lock, flags);
2099
2100 return 0;
2101 }
2102 #endif /* CONFIG_PM */
2103
2104 static const struct pci_device_id cp_pci_tbl[] = {
2105 { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
2106 { PCI_DEVICE(PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322), },
2107 { },
2108 };
2109 MODULE_DEVICE_TABLE(pci, cp_pci_tbl);
2110
2111 static struct pci_driver cp_driver = {
2112 .name = DRV_NAME,
2113 .id_table = cp_pci_tbl,
2114 .probe = cp_init_one,
2115 .remove = cp_remove_one,
2116 #ifdef CONFIG_PM
2117 .resume = cp_resume,
2118 .suspend = cp_suspend,
2119 #endif
2120 };
2121
2122 module_pci_driver(cp_driver);
Linux kernel - Deliverables
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