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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / tc35815.c
blobd1298e5b72c565d0e9c37fa4bef9052030475e5a
1 /*
2 * tc35815.c: A TOSHIBA TC35815CF PCI 10/100Mbps ethernet driver for linux.
3 *
4 * Based on skelton.c by Donald Becker.
5 *
6 * This driver is a replacement of older and less maintained version.
7 * This is a header of the older version:
8 * -----<snip>-----
9 * Copyright 2001 MontaVista Software Inc.
10 * Author: MontaVista Software, Inc.
11 * ahennessy@mvista.com
12 * Copyright (C) 2000-2001 Toshiba Corporation
13 * static const char *version =
14 * "tc35815.c:v0.00 26/07/2000 by Toshiba Corporation\n";
15 * -----<snip>-----
16 *
17 * This file is subject to the terms and conditions of the GNU General Public
18 * License. See the file "COPYING" in the main directory of this archive
19 * for more details.
20 *
21 * (C) Copyright TOSHIBA CORPORATION 2004-2005
22 * All Rights Reserved.
23 */
24
25 #ifdef TC35815_NAPI
26 #define DRV_VERSION "1.38-NAPI"
27 #else
28 #define DRV_VERSION "1.38"
29 #endif
30 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
31 #define MODNAME "tc35815"
32
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/types.h>
36 #include <linux/fcntl.h>
37 #include <linux/interrupt.h>
38 #include <linux/ioport.h>
39 #include <linux/in.h>
40 #include <linux/if_vlan.h>
41 #include <linux/slab.h>
42 #include <linux/string.h>
43 #include <linux/spinlock.h>
44 #include <linux/errno.h>
45 #include <linux/init.h>
46 #include <linux/netdevice.h>
47 #include <linux/etherdevice.h>
48 #include <linux/skbuff.h>
49 #include <linux/delay.h>
50 #include <linux/pci.h>
51 #include <linux/phy.h>
52 #include <linux/workqueue.h>
53 #include <linux/platform_device.h>
54 #include <asm/io.h>
55 #include <asm/byteorder.h>
56
57 /* First, a few definitions that the brave might change. */
58
59 #define GATHER_TXINT /* On-Demand Tx Interrupt */
60 #define WORKAROUND_LOSTCAR
61 #define WORKAROUND_100HALF_PROMISC
62 /* #define TC35815_USE_PACKEDBUFFER */
63
64 enum tc35815_chiptype {
65 TC35815CF = 0,
66 TC35815_NWU,
67 TC35815_TX4939,
68 };
69
70 /* indexed by tc35815_chiptype, above */
71 static const struct {
72 const char *name;
73 } chip_info[] __devinitdata = {
74 { "TOSHIBA TC35815CF 10/100BaseTX" },
75 { "TOSHIBA TC35815 with Wake on LAN" },
76 { "TOSHIBA TC35815/TX4939" },
77 };
78
79 static const struct pci_device_id tc35815_pci_tbl[] = {
80 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
81 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
82 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
83 {0,}
84 };
85 MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
86
87 /* see MODULE_PARM_DESC */
88 static struct tc35815_options {
89 int speed;
90 int duplex;
91 } options;
92
93 /*
94 * Registers
95 */
96 struct tc35815_regs {
97 __u32 DMA_Ctl; /* 0x00 */
98 __u32 TxFrmPtr;
99 __u32 TxThrsh;
100 __u32 TxPollCtr;
101 __u32 BLFrmPtr;
102 __u32 RxFragSize;
103 __u32 Int_En;
104 __u32 FDA_Bas;
105 __u32 FDA_Lim; /* 0x20 */
106 __u32 Int_Src;
107 __u32 unused0[2];
108 __u32 PauseCnt;
109 __u32 RemPauCnt;
110 __u32 TxCtlFrmStat;
111 __u32 unused1;
112 __u32 MAC_Ctl; /* 0x40 */
113 __u32 CAM_Ctl;
114 __u32 Tx_Ctl;
115 __u32 Tx_Stat;
116 __u32 Rx_Ctl;
117 __u32 Rx_Stat;
118 __u32 MD_Data;
119 __u32 MD_CA;
120 __u32 CAM_Adr; /* 0x60 */
121 __u32 CAM_Data;
122 __u32 CAM_Ena;
123 __u32 PROM_Ctl;
124 __u32 PROM_Data;
125 __u32 Algn_Cnt;
126 __u32 CRC_Cnt;
127 __u32 Miss_Cnt;
128 };
129
130 /*
131 * Bit assignments
132 */
133 /* DMA_Ctl bit asign ------------------------------------------------------- */
134 #define DMA_RxAlign 0x00c00000 /* 1:Reception Alignment */
135 #define DMA_RxAlign_1 0x00400000
136 #define DMA_RxAlign_2 0x00800000
137 #define DMA_RxAlign_3 0x00c00000
138 #define DMA_M66EnStat 0x00080000 /* 1:66MHz Enable State */
139 #define DMA_IntMask 0x00040000 /* 1:Interupt mask */
140 #define DMA_SWIntReq 0x00020000 /* 1:Software Interrupt request */
141 #define DMA_TxWakeUp 0x00010000 /* 1:Transmit Wake Up */
142 #define DMA_RxBigE 0x00008000 /* 1:Receive Big Endian */
143 #define DMA_TxBigE 0x00004000 /* 1:Transmit Big Endian */
144 #define DMA_TestMode 0x00002000 /* 1:Test Mode */
145 #define DMA_PowrMgmnt 0x00001000 /* 1:Power Management */
146 #define DMA_DmBurst_Mask 0x000001fc /* DMA Burst size */
147
148 /* RxFragSize bit asign ---------------------------------------------------- */
149 #define RxFrag_EnPack 0x00008000 /* 1:Enable Packing */
150 #define RxFrag_MinFragMask 0x00000ffc /* Minimum Fragment */
151
152 /* MAC_Ctl bit asign ------------------------------------------------------- */
153 #define MAC_Link10 0x00008000 /* 1:Link Status 10Mbits */
154 #define MAC_EnMissRoll 0x00002000 /* 1:Enable Missed Roll */
155 #define MAC_MissRoll 0x00000400 /* 1:Missed Roll */
156 #define MAC_Loop10 0x00000080 /* 1:Loop 10 Mbps */
157 #define MAC_Conn_Auto 0x00000000 /*00:Connection mode (Automatic) */
158 #define MAC_Conn_10M 0x00000020 /*01: (10Mbps endec)*/
159 #define MAC_Conn_Mll 0x00000040 /*10: (Mll clock) */
160 #define MAC_MacLoop 0x00000010 /* 1:MAC Loopback */
161 #define MAC_FullDup 0x00000008 /* 1:Full Duplex 0:Half Duplex */
162 #define MAC_Reset 0x00000004 /* 1:Software Reset */
163 #define MAC_HaltImm 0x00000002 /* 1:Halt Immediate */
164 #define MAC_HaltReq 0x00000001 /* 1:Halt request */
165
166 /* PROM_Ctl bit asign ------------------------------------------------------ */
167 #define PROM_Busy 0x00008000 /* 1:Busy (Start Operation) */
168 #define PROM_Read 0x00004000 /*10:Read operation */
169 #define PROM_Write 0x00002000 /*01:Write operation */
170 #define PROM_Erase 0x00006000 /*11:Erase operation */
171 /*00:Enable or Disable Writting, */
172 /* as specified in PROM_Addr. */
173 #define PROM_Addr_Ena 0x00000030 /*11xxxx:PROM Write enable */
174 /*00xxxx: disable */
175
176 /* CAM_Ctl bit asign ------------------------------------------------------- */
177 #define CAM_CompEn 0x00000010 /* 1:CAM Compare Enable */
178 #define CAM_NegCAM 0x00000008 /* 1:Reject packets CAM recognizes,*/
179 /* accept other */
180 #define CAM_BroadAcc 0x00000004 /* 1:Broadcast assept */
181 #define CAM_GroupAcc 0x00000002 /* 1:Multicast assept */
182 #define CAM_StationAcc 0x00000001 /* 1:unicast accept */
183
184 /* CAM_Ena bit asign ------------------------------------------------------- */
185 #define CAM_ENTRY_MAX 21 /* CAM Data entry max count */
186 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits) */
187 #define CAM_Ena_Bit(index) (1 << (index))
188 #define CAM_ENTRY_DESTINATION 0
189 #define CAM_ENTRY_SOURCE 1
190 #define CAM_ENTRY_MACCTL 20
191
192 /* Tx_Ctl bit asign -------------------------------------------------------- */
193 #define Tx_En 0x00000001 /* 1:Transmit enable */
194 #define Tx_TxHalt 0x00000002 /* 1:Transmit Halt Request */
195 #define Tx_NoPad 0x00000004 /* 1:Suppress Padding */
196 #define Tx_NoCRC 0x00000008 /* 1:Suppress Padding */
197 #define Tx_FBack 0x00000010 /* 1:Fast Back-off */
198 #define Tx_EnUnder 0x00000100 /* 1:Enable Underrun */
199 #define Tx_EnExDefer 0x00000200 /* 1:Enable Excessive Deferral */
200 #define Tx_EnLCarr 0x00000400 /* 1:Enable Lost Carrier */
201 #define Tx_EnExColl 0x00000800 /* 1:Enable Excessive Collision */
202 #define Tx_EnLateColl 0x00001000 /* 1:Enable Late Collision */
203 #define Tx_EnTxPar 0x00002000 /* 1:Enable Transmit Parity */
204 #define Tx_EnComp 0x00004000 /* 1:Enable Completion */
205
206 /* Tx_Stat bit asign ------------------------------------------------------- */
207 #define Tx_TxColl_MASK 0x0000000F /* Tx Collision Count */
208 #define Tx_ExColl 0x00000010 /* Excessive Collision */
209 #define Tx_TXDefer 0x00000020 /* Transmit Defered */
210 #define Tx_Paused 0x00000040 /* Transmit Paused */
211 #define Tx_IntTx 0x00000080 /* Interrupt on Tx */
212 #define Tx_Under 0x00000100 /* Underrun */
213 #define Tx_Defer 0x00000200 /* Deferral */
214 #define Tx_NCarr 0x00000400 /* No Carrier */
215 #define Tx_10Stat 0x00000800 /* 10Mbps Status */
216 #define Tx_LateColl 0x00001000 /* Late Collision */
217 #define Tx_TxPar 0x00002000 /* Tx Parity Error */
218 #define Tx_Comp 0x00004000 /* Completion */
219 #define Tx_Halted 0x00008000 /* Tx Halted */
220 #define Tx_SQErr 0x00010000 /* Signal Quality Error(SQE) */
221
222 /* Rx_Ctl bit asign -------------------------------------------------------- */
223 #define Rx_EnGood 0x00004000 /* 1:Enable Good */
224 #define Rx_EnRxPar 0x00002000 /* 1:Enable Receive Parity */
225 #define Rx_EnLongErr 0x00000800 /* 1:Enable Long Error */
226 #define Rx_EnOver 0x00000400 /* 1:Enable OverFlow */
227 #define Rx_EnCRCErr 0x00000200 /* 1:Enable CRC Error */
228 #define Rx_EnAlign 0x00000100 /* 1:Enable Alignment */
229 #define Rx_IgnoreCRC 0x00000040 /* 1:Ignore CRC Value */
230 #define Rx_StripCRC 0x00000010 /* 1:Strip CRC Value */
231 #define Rx_ShortEn 0x00000008 /* 1:Short Enable */
232 #define Rx_LongEn 0x00000004 /* 1:Long Enable */
233 #define Rx_RxHalt 0x00000002 /* 1:Receive Halt Request */
234 #define Rx_RxEn 0x00000001 /* 1:Receive Intrrupt Enable */
235
236 /* Rx_Stat bit asign ------------------------------------------------------- */
237 #define Rx_Halted 0x00008000 /* Rx Halted */
238 #define Rx_Good 0x00004000 /* Rx Good */
239 #define Rx_RxPar 0x00002000 /* Rx Parity Error */
240 #define Rx_TypePkt 0x00001000 /* Rx Type Packet */
241 #define Rx_LongErr 0x00000800 /* Rx Long Error */
242 #define Rx_Over 0x00000400 /* Rx Overflow */
243 #define Rx_CRCErr 0x00000200 /* Rx CRC Error */
244 #define Rx_Align 0x00000100 /* Rx Alignment Error */
245 #define Rx_10Stat 0x00000080 /* Rx 10Mbps Status */
246 #define Rx_IntRx 0x00000040 /* Rx Interrupt */
247 #define Rx_CtlRecd 0x00000020 /* Rx Control Receive */
248 #define Rx_InLenErr 0x00000010 /* Rx In Range Frame Length Error */
249
250 #define Rx_Stat_Mask 0x0000FFF0 /* Rx All Status Mask */
251
252 /* Int_En bit asign -------------------------------------------------------- */
253 #define Int_NRAbtEn 0x00000800 /* 1:Non-recoverable Abort Enable */
254 #define Int_TxCtlCmpEn 0x00000400 /* 1:Transmit Ctl Complete Enable */
255 #define Int_DmParErrEn 0x00000200 /* 1:DMA Parity Error Enable */
256 #define Int_DParDEn 0x00000100 /* 1:Data Parity Error Enable */
257 #define Int_EarNotEn 0x00000080 /* 1:Early Notify Enable */
258 #define Int_DParErrEn 0x00000040 /* 1:Detected Parity Error Enable */
259 #define Int_SSysErrEn 0x00000020 /* 1:Signalled System Error Enable */
260 #define Int_RMasAbtEn 0x00000010 /* 1:Received Master Abort Enable */
261 #define Int_RTargAbtEn 0x00000008 /* 1:Received Target Abort Enable */
262 #define Int_STargAbtEn 0x00000004 /* 1:Signalled Target Abort Enable */
263 #define Int_BLExEn 0x00000002 /* 1:Buffer List Exhausted Enable */
264 #define Int_FDAExEn 0x00000001 /* 1:Free Descriptor Area */
265 /* Exhausted Enable */
266
267 /* Int_Src bit asign ------------------------------------------------------- */
268 #define Int_NRabt 0x00004000 /* 1:Non Recoverable error */
269 #define Int_DmParErrStat 0x00002000 /* 1:DMA Parity Error & Clear */
270 #define Int_BLEx 0x00001000 /* 1:Buffer List Empty & Clear */
271 #define Int_FDAEx 0x00000800 /* 1:FDA Empty & Clear */
272 #define Int_IntNRAbt 0x00000400 /* 1:Non Recoverable Abort */
273 #define Int_IntCmp 0x00000200 /* 1:MAC control packet complete */
274 #define Int_IntExBD 0x00000100 /* 1:Interrupt Extra BD & Clear */
275 #define Int_DmParErr 0x00000080 /* 1:DMA Parity Error & Clear */
276 #define Int_IntEarNot 0x00000040 /* 1:Receive Data write & Clear */
277 #define Int_SWInt 0x00000020 /* 1:Software request & Clear */
278 #define Int_IntBLEx 0x00000010 /* 1:Buffer List Empty & Clear */
279 #define Int_IntFDAEx 0x00000008 /* 1:FDA Empty & Clear */
280 #define Int_IntPCI 0x00000004 /* 1:PCI controller & Clear */
281 #define Int_IntMacRx 0x00000002 /* 1:Rx controller & Clear */
282 #define Int_IntMacTx 0x00000001 /* 1:Tx controller & Clear */
283
284 /* MD_CA bit asign --------------------------------------------------------- */
285 #define MD_CA_PreSup 0x00001000 /* 1:Preamble Supress */
286 #define MD_CA_Busy 0x00000800 /* 1:Busy (Start Operation) */
287 #define MD_CA_Wr 0x00000400 /* 1:Write 0:Read */
288
289
290 /*
291 * Descriptors
292 */
293
294 /* Frame descripter */
295 struct FDesc {
296 volatile __u32 FDNext;
297 volatile __u32 FDSystem;
298 volatile __u32 FDStat;
299 volatile __u32 FDCtl;
300 };
301
302 /* Buffer descripter */
303 struct BDesc {
304 volatile __u32 BuffData;
305 volatile __u32 BDCtl;
306 };
307
308 #define FD_ALIGN 16
309
310 /* Frame Descripter bit asign ---------------------------------------------- */
311 #define FD_FDLength_MASK 0x0000FFFF /* Length MASK */
312 #define FD_BDCnt_MASK 0x001F0000 /* BD count MASK in FD */
313 #define FD_FrmOpt_MASK 0x7C000000 /* Frame option MASK */
314 #define FD_FrmOpt_BigEndian 0x40000000 /* Tx/Rx */
315 #define FD_FrmOpt_IntTx 0x20000000 /* Tx only */
316 #define FD_FrmOpt_NoCRC 0x10000000 /* Tx only */
317 #define FD_FrmOpt_NoPadding 0x08000000 /* Tx only */
318 #define FD_FrmOpt_Packing 0x04000000 /* Rx only */
319 #define FD_CownsFD 0x80000000 /* FD Controller owner bit */
320 #define FD_Next_EOL 0x00000001 /* FD EOL indicator */
321 #define FD_BDCnt_SHIFT 16
322
323 /* Buffer Descripter bit asign --------------------------------------------- */
324 #define BD_BuffLength_MASK 0x0000FFFF /* Recieve Data Size */
325 #define BD_RxBDID_MASK 0x00FF0000 /* BD ID Number MASK */
326 #define BD_RxBDSeqN_MASK 0x7F000000 /* Rx BD Sequence Number */
327 #define BD_CownsBD 0x80000000 /* BD Controller owner bit */
328 #define BD_RxBDID_SHIFT 16
329 #define BD_RxBDSeqN_SHIFT 24
330
331
332 /* Some useful constants. */
333 #undef NO_CHECK_CARRIER /* Does not check No-Carrier with TP */
334
335 #ifdef NO_CHECK_CARRIER
336 #define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
337 Tx_EnExColl | Tx_EnExDefer | Tx_EnUnder | \
338 Tx_En) /* maybe 0x7b01 */
339 #else
340 #define TX_CTL_CMD (Tx_EnComp | Tx_EnTxPar | Tx_EnLateColl | \
341 Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
342 Tx_En) /* maybe 0x7b01 */
343 #endif
344 /* Do not use Rx_StripCRC -- it causes trouble on BLEx/FDAEx condition */
345 #define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
346 | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
347 #define INT_EN_CMD (Int_NRAbtEn | \
348 Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
349 Int_SSysErrEn | Int_RMasAbtEn | Int_RTargAbtEn | \
350 Int_STargAbtEn | \
351 Int_BLExEn | Int_FDAExEn) /* maybe 0xb7f*/
352 #define DMA_CTL_CMD DMA_BURST_SIZE
353 #define HAVE_DMA_RXALIGN(lp) likely((lp)->chiptype != TC35815CF)
354
355 /* Tuning parameters */
356 #define DMA_BURST_SIZE 32
357 #define TX_THRESHOLD 1024
358 /* used threshold with packet max byte for low pci transfer ability.*/
359 #define TX_THRESHOLD_MAX 1536
360 /* setting threshold max value when overrun error occured this count. */
361 #define TX_THRESHOLD_KEEP_LIMIT 10
362
363 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
364 #ifdef TC35815_USE_PACKEDBUFFER
365 #define FD_PAGE_NUM 2
366 #define RX_BUF_NUM 8 /* >= 2 */
367 #define RX_FD_NUM 250 /* >= 32 */
368 #define TX_FD_NUM 128
369 #define RX_BUF_SIZE PAGE_SIZE
370 #else /* TC35815_USE_PACKEDBUFFER */
371 #define FD_PAGE_NUM 4
372 #define RX_BUF_NUM 128 /* < 256 */
373 #define RX_FD_NUM 256 /* >= 32 */
374 #define TX_FD_NUM 128
375 #if RX_CTL_CMD & Rx_LongEn
376 #define RX_BUF_SIZE PAGE_SIZE
377 #elif RX_CTL_CMD & Rx_StripCRC
378 #define RX_BUF_SIZE \
379 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
380 #else
381 #define RX_BUF_SIZE \
382 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
383 #endif
384 #endif /* TC35815_USE_PACKEDBUFFER */
385 #define RX_FD_RESERVE (2 / 2) /* max 2 BD per RxFD */
386 #define NAPI_WEIGHT 16
387
388 struct TxFD {
389 struct FDesc fd;
390 struct BDesc bd;
391 struct BDesc unused;
392 };
393
394 struct RxFD {
395 struct FDesc fd;
396 struct BDesc bd[0]; /* variable length */
397 };
398
399 struct FrFD {
400 struct FDesc fd;
401 struct BDesc bd[RX_BUF_NUM];
402 };
403
404
405 #define tc_readl(addr) ioread32(addr)
406 #define tc_writel(d, addr) iowrite32(d, addr)
407
408 #define TC35815_TX_TIMEOUT msecs_to_jiffies(400)
409
410 /* Information that need to be kept for each controller. */
411 struct tc35815_local {
412 struct pci_dev *pci_dev;
413
414 struct net_device *dev;
415 struct napi_struct napi;
416
417 /* statistics */
418 struct {
419 int max_tx_qlen;
420 int tx_ints;
421 int rx_ints;
422 int tx_underrun;
423 } lstats;
424
425 /* Tx control lock. This protects the transmit buffer ring
426 * state along with the "tx full" state of the driver. This
427 * means all netif_queue flow control actions are protected
428 * by this lock as well.
429 */
430 spinlock_t lock;
431
432 struct mii_bus *mii_bus;
433 struct phy_device *phy_dev;
434 int duplex;
435 int speed;
436 int link;
437 struct work_struct restart_work;
438
439 /*
440 * Transmitting: Batch Mode.
441 * 1 BD in 1 TxFD.
442 * Receiving: Packing Mode. (TC35815_USE_PACKEDBUFFER)
443 * 1 circular FD for Free Buffer List.
444 * RX_BUF_NUM BD in Free Buffer FD.
445 * One Free Buffer BD has PAGE_SIZE data buffer.
446 * Or Non-Packing Mode.
447 * 1 circular FD for Free Buffer List.
448 * RX_BUF_NUM BD in Free Buffer FD.
449 * One Free Buffer BD has ETH_FRAME_LEN data buffer.
450 */
451 void *fd_buf; /* for TxFD, RxFD, FrFD */
452 dma_addr_t fd_buf_dma;
453 struct TxFD *tfd_base;
454 unsigned int tfd_start;
455 unsigned int tfd_end;
456 struct RxFD *rfd_base;
457 struct RxFD *rfd_limit;
458 struct RxFD *rfd_cur;
459 struct FrFD *fbl_ptr;
460 #ifdef TC35815_USE_PACKEDBUFFER
461 unsigned char fbl_curid;
462 void *data_buf[RX_BUF_NUM]; /* packing */
463 dma_addr_t data_buf_dma[RX_BUF_NUM];
464 struct {
465 struct sk_buff *skb;
466 dma_addr_t skb_dma;
467 } tx_skbs[TX_FD_NUM];
468 #else
469 unsigned int fbl_count;
470 struct {
471 struct sk_buff *skb;
472 dma_addr_t skb_dma;
473 } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
474 #endif
475 u32 msg_enable;
476 enum tc35815_chiptype chiptype;
477 };
478
479 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
480 {
481 return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
482 }
483 #ifdef DEBUG
484 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
485 {
486 return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
487 }
488 #endif
489 #ifdef TC35815_USE_PACKEDBUFFER
490 static inline void *rxbuf_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
491 {
492 int i;
493 for (i = 0; i < RX_BUF_NUM; i++) {
494 if (bus >= lp->data_buf_dma[i] &&
495 bus < lp->data_buf_dma[i] + PAGE_SIZE)
496 return (void *)((u8 *)lp->data_buf[i] +
497 (bus - lp->data_buf_dma[i]));
498 }
499 return NULL;
500 }
501
502 #define TC35815_DMA_SYNC_ONDEMAND
503 static void *alloc_rxbuf_page(struct pci_dev *hwdev, dma_addr_t *dma_handle)
504 {
505 #ifdef TC35815_DMA_SYNC_ONDEMAND
506 void *buf;
507 /* pci_map + pci_dma_sync will be more effective than
508 * pci_alloc_consistent on some archs. */
509 buf = (void *)__get_free_page(GFP_ATOMIC);
510 if (!buf)
511 return NULL;
512 *dma_handle = pci_map_single(hwdev, buf, PAGE_SIZE,
513 PCI_DMA_FROMDEVICE);
514 if (pci_dma_mapping_error(hwdev, *dma_handle)) {
515 free_page((unsigned long)buf);
516 return NULL;
517 }
518 return buf;
519 #else
520 return pci_alloc_consistent(hwdev, PAGE_SIZE, dma_handle);
521 #endif
522 }
523
524 static void free_rxbuf_page(struct pci_dev *hwdev, void *buf, dma_addr_t dma_handle)
525 {
526 #ifdef TC35815_DMA_SYNC_ONDEMAND
527 pci_unmap_single(hwdev, dma_handle, PAGE_SIZE, PCI_DMA_FROMDEVICE);
528 free_page((unsigned long)buf);
529 #else
530 pci_free_consistent(hwdev, PAGE_SIZE, buf, dma_handle);
531 #endif
532 }
533 #else /* TC35815_USE_PACKEDBUFFER */
534 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
535 struct pci_dev *hwdev,
536 dma_addr_t *dma_handle)
537 {
538 struct sk_buff *skb;
539 skb = dev_alloc_skb(RX_BUF_SIZE);
540 if (!skb)
541 return NULL;
542 *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
543 PCI_DMA_FROMDEVICE);
544 if (pci_dma_mapping_error(hwdev, *dma_handle)) {
545 dev_kfree_skb_any(skb);
546 return NULL;
547 }
548 skb_reserve(skb, 2); /* make IP header 4byte aligned */
549 return skb;
550 }
551
552 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
553 {
554 pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
555 PCI_DMA_FROMDEVICE);
556 dev_kfree_skb_any(skb);
557 }
558 #endif /* TC35815_USE_PACKEDBUFFER */
559
560 /* Index to functions, as function prototypes. */
561
562 static int tc35815_open(struct net_device *dev);
563 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
564 static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
565 #ifdef TC35815_NAPI
566 static int tc35815_rx(struct net_device *dev, int limit);
567 static int tc35815_poll(struct napi_struct *napi, int budget);
568 #else
569 static void tc35815_rx(struct net_device *dev);
570 #endif
571 static void tc35815_txdone(struct net_device *dev);
572 static int tc35815_close(struct net_device *dev);
573 static struct net_device_stats *tc35815_get_stats(struct net_device *dev);
574 static void tc35815_set_multicast_list(struct net_device *dev);
575 static void tc35815_tx_timeout(struct net_device *dev);
576 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
577 #ifdef CONFIG_NET_POLL_CONTROLLER
578 static void tc35815_poll_controller(struct net_device *dev);
579 #endif
580 static const struct ethtool_ops tc35815_ethtool_ops;
581
582 /* Example routines you must write ;->. */
583 static void tc35815_chip_reset(struct net_device *dev);
584 static void tc35815_chip_init(struct net_device *dev);
585
586 #ifdef DEBUG
587 static void panic_queues(struct net_device *dev);
588 #endif
589
590 static void tc35815_restart_work(struct work_struct *work);
591
592 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
593 {
594 struct net_device *dev = bus->priv;
595 struct tc35815_regs __iomem *tr =
596 (struct tc35815_regs __iomem *)dev->base_addr;
597 unsigned long timeout = jiffies + HZ;
598
599 tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
600 udelay(12); /* it takes 32 x 400ns at least */
601 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
602 if (time_after(jiffies, timeout))
603 return -EIO;
604 cpu_relax();
605 }
606 return tc_readl(&tr->MD_Data) & 0xffff;
607 }
608
609 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
610 {
611 struct net_device *dev = bus->priv;
612 struct tc35815_regs __iomem *tr =
613 (struct tc35815_regs __iomem *)dev->base_addr;
614 unsigned long timeout = jiffies + HZ;
615
616 tc_writel(val, &tr->MD_Data);
617 tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
618 &tr->MD_CA);
619 udelay(12); /* it takes 32 x 400ns at least */
620 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
621 if (time_after(jiffies, timeout))
622 return -EIO;
623 cpu_relax();
624 }
625 return 0;
626 }
627
628 static void tc_handle_link_change(struct net_device *dev)
629 {
630 struct tc35815_local *lp = netdev_priv(dev);
631 struct phy_device *phydev = lp->phy_dev;
632 unsigned long flags;
633 int status_change = 0;
634
635 spin_lock_irqsave(&lp->lock, flags);
636 if (phydev->link &&
637 (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
638 struct tc35815_regs __iomem *tr =
639 (struct tc35815_regs __iomem *)dev->base_addr;
640 u32 reg;
641
642 reg = tc_readl(&tr->MAC_Ctl);
643 reg |= MAC_HaltReq;
644 tc_writel(reg, &tr->MAC_Ctl);
645 if (phydev->duplex == DUPLEX_FULL)
646 reg |= MAC_FullDup;
647 else
648 reg &= ~MAC_FullDup;
649 tc_writel(reg, &tr->MAC_Ctl);
650 reg &= ~MAC_HaltReq;
651 tc_writel(reg, &tr->MAC_Ctl);
652
653 /*
654 * TX4939 PCFG.SPEEDn bit will be changed on
655 * NETDEV_CHANGE event.
656 */
657
658 #if !defined(NO_CHECK_CARRIER) && defined(WORKAROUND_LOSTCAR)
659 /*
660 * WORKAROUND: enable LostCrS only if half duplex
661 * operation.
662 * (TX4939 does not have EnLCarr)
663 */
664 if (phydev->duplex == DUPLEX_HALF &&
665 lp->chiptype != TC35815_TX4939)
666 tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
667 &tr->Tx_Ctl);
668 #endif
669
670 lp->speed = phydev->speed;
671 lp->duplex = phydev->duplex;
672 status_change = 1;
673 }
674
675 if (phydev->link != lp->link) {
676 if (phydev->link) {
677 #ifdef WORKAROUND_100HALF_PROMISC
678 /* delayed promiscuous enabling */
679 if (dev->flags & IFF_PROMISC)
680 tc35815_set_multicast_list(dev);
681 #endif
682 } else {
683 lp->speed = 0;
684 lp->duplex = -1;
685 }
686 lp->link = phydev->link;
687
688 status_change = 1;
689 }
690 spin_unlock_irqrestore(&lp->lock, flags);
691
692 if (status_change && netif_msg_link(lp)) {
693 phy_print_status(phydev);
694 pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
695 dev->name,
696 phy_read(phydev, MII_BMCR),
697 phy_read(phydev, MII_BMSR),
698 phy_read(phydev, MII_LPA));
699 }
700 }
701
702 static int tc_mii_probe(struct net_device *dev)
703 {
704 struct tc35815_local *lp = netdev_priv(dev);
705 struct phy_device *phydev = NULL;
706 int phy_addr;
707 u32 dropmask;
708
709 /* find the first phy */
710 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
711 if (lp->mii_bus->phy_map[phy_addr]) {
712 if (phydev) {
713 printk(KERN_ERR "%s: multiple PHYs found\n",
714 dev->name);
715 return -EINVAL;
716 }
717 phydev = lp->mii_bus->phy_map[phy_addr];
718 break;
719 }
720 }
721
722 if (!phydev) {
723 printk(KERN_ERR "%s: no PHY found\n", dev->name);
724 return -ENODEV;
725 }
726
727 /* attach the mac to the phy */
728 phydev = phy_connect(dev, dev_name(&phydev->dev),
729 &tc_handle_link_change, 0,
730 lp->chiptype == TC35815_TX4939 ?
731 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
732 if (IS_ERR(phydev)) {
733 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
734 return PTR_ERR(phydev);
735 }
736 printk(KERN_INFO "%s: attached PHY driver [%s] "
737 "(mii_bus:phy_addr=%s, id=%x)\n",
738 dev->name, phydev->drv->name, dev_name(&phydev->dev),
739 phydev->phy_id);
740
741 /* mask with MAC supported features */
742 phydev->supported &= PHY_BASIC_FEATURES;
743 dropmask = 0;
744 if (options.speed == 10)
745 dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
746 else if (options.speed == 100)
747 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
748 if (options.duplex == 1)
749 dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
750 else if (options.duplex == 2)
751 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
752 phydev->supported &= ~dropmask;
753 phydev->advertising = phydev->supported;
754
755 lp->link = 0;
756 lp->speed = 0;
757 lp->duplex = -1;
758 lp->phy_dev = phydev;
759
760 return 0;
761 }
762
763 static int tc_mii_init(struct net_device *dev)
764 {
765 struct tc35815_local *lp = netdev_priv(dev);
766 int err;
767 int i;
768
769 lp->mii_bus = mdiobus_alloc();
770 if (lp->mii_bus == NULL) {
771 err = -ENOMEM;
772 goto err_out;
773 }
774
775 lp->mii_bus->name = "tc35815_mii_bus";
776 lp->mii_bus->read = tc_mdio_read;
777 lp->mii_bus->write = tc_mdio_write;
778 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
779 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
780 lp->mii_bus->priv = dev;
781 lp->mii_bus->parent = &lp->pci_dev->dev;
782 lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
783 if (!lp->mii_bus->irq) {
784 err = -ENOMEM;
785 goto err_out_free_mii_bus;
786 }
787
788 for (i = 0; i < PHY_MAX_ADDR; i++)
789 lp->mii_bus->irq[i] = PHY_POLL;
790
791 err = mdiobus_register(lp->mii_bus);
792 if (err)
793 goto err_out_free_mdio_irq;
794 err = tc_mii_probe(dev);
795 if (err)
796 goto err_out_unregister_bus;
797 return 0;
798
799 err_out_unregister_bus:
800 mdiobus_unregister(lp->mii_bus);
801 err_out_free_mdio_irq:
802 kfree(lp->mii_bus->irq);
803 err_out_free_mii_bus:
804 mdiobus_free(lp->mii_bus);
805 err_out:
806 return err;
807 }
808
809 #ifdef CONFIG_CPU_TX49XX
810 /*
811 * Find a platform_device providing a MAC address. The platform code
812 * should provide a "tc35815-mac" device with a MAC address in its
813 * platform_data.
814 */
815 static int __devinit tc35815_mac_match(struct device *dev, void *data)
816 {
817 struct platform_device *plat_dev = to_platform_device(dev);
818 struct pci_dev *pci_dev = data;
819 unsigned int id = pci_dev->irq;
820 return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
821 }
822
823 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
824 {
825 struct tc35815_local *lp = netdev_priv(dev);
826 struct device *pd = bus_find_device(&platform_bus_type, NULL,
827 lp->pci_dev, tc35815_mac_match);
828 if (pd) {
829 if (pd->platform_data)
830 memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
831 put_device(pd);
832 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
833 }
834 return -ENODEV;
835 }
836 #else
837 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
838 {
839 return -ENODEV;
840 }
841 #endif
842
843 static int __devinit tc35815_init_dev_addr(struct net_device *dev)
844 {
845 struct tc35815_regs __iomem *tr =
846 (struct tc35815_regs __iomem *)dev->base_addr;
847 int i;
848
849 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
850 ;
851 for (i = 0; i < 6; i += 2) {
852 unsigned short data;
853 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
854 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
855 ;
856 data = tc_readl(&tr->PROM_Data);
857 dev->dev_addr[i] = data & 0xff;
858 dev->dev_addr[i+1] = data >> 8;
859 }
860 if (!is_valid_ether_addr(dev->dev_addr))
861 return tc35815_read_plat_dev_addr(dev);
862 return 0;
863 }
864
865 static const struct net_device_ops tc35815_netdev_ops = {
866 .ndo_open = tc35815_open,
867 .ndo_stop = tc35815_close,
868 .ndo_start_xmit = tc35815_send_packet,
869 .ndo_get_stats = tc35815_get_stats,
870 .ndo_set_multicast_list = tc35815_set_multicast_list,
871 .ndo_tx_timeout = tc35815_tx_timeout,
872 .ndo_do_ioctl = tc35815_ioctl,
873 .ndo_validate_addr = eth_validate_addr,
874 .ndo_change_mtu = eth_change_mtu,
875 .ndo_set_mac_address = eth_mac_addr,
876 #ifdef CONFIG_NET_POLL_CONTROLLER
877 .ndo_poll_controller = tc35815_poll_controller,
878 #endif
879 };
880
881 static int __devinit tc35815_init_one(struct pci_dev *pdev,
882 const struct pci_device_id *ent)
883 {
884 void __iomem *ioaddr = NULL;
885 struct net_device *dev;
886 struct tc35815_local *lp;
887 int rc;
888
889 static int printed_version;
890 if (!printed_version++) {
891 printk(version);
892 dev_printk(KERN_DEBUG, &pdev->dev,
893 "speed:%d duplex:%d\n",
894 options.speed, options.duplex);
895 }
896
897 if (!pdev->irq) {
898 dev_warn(&pdev->dev, "no IRQ assigned.\n");
899 return -ENODEV;
900 }
901
902 /* dev zeroed in alloc_etherdev */
903 dev = alloc_etherdev(sizeof(*lp));
904 if (dev == NULL) {
905 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
906 return -ENOMEM;
907 }
908 SET_NETDEV_DEV(dev, &pdev->dev);
909 lp = netdev_priv(dev);
910 lp->dev = dev;
911
912 /* enable device (incl. PCI PM wakeup), and bus-mastering */
913 rc = pcim_enable_device(pdev);
914 if (rc)
915 goto err_out;
916 rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
917 if (rc)
918 goto err_out;
919 pci_set_master(pdev);
920 ioaddr = pcim_iomap_table(pdev)[1];
921
922 /* Initialize the device structure. */
923 dev->netdev_ops = &tc35815_netdev_ops;
924 dev->ethtool_ops = &tc35815_ethtool_ops;
925 dev->watchdog_timeo = TC35815_TX_TIMEOUT;
926 #ifdef TC35815_NAPI
927 netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
928 #endif
929
930 dev->irq = pdev->irq;
931 dev->base_addr = (unsigned long)ioaddr;
932
933 INIT_WORK(&lp->restart_work, tc35815_restart_work);
934 spin_lock_init(&lp->lock);
935 lp->pci_dev = pdev;
936 lp->chiptype = ent->driver_data;
937
938 lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
939 pci_set_drvdata(pdev, dev);
940
941 /* Soft reset the chip. */
942 tc35815_chip_reset(dev);
943
944 /* Retrieve the ethernet address. */
945 if (tc35815_init_dev_addr(dev)) {
946 dev_warn(&pdev->dev, "not valid ether addr\n");
947 random_ether_addr(dev->dev_addr);
948 }
949
950 rc = register_netdev(dev);
951 if (rc)
952 goto err_out;
953
954 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
955 printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
956 dev->name,
957 chip_info[ent->driver_data].name,
958 dev->base_addr,
959 dev->dev_addr,
960 dev->irq);
961
962 rc = tc_mii_init(dev);
963 if (rc)
964 goto err_out_unregister;
965
966 return 0;
967
968 err_out_unregister:
969 unregister_netdev(dev);
970 err_out:
971 free_netdev(dev);
972 return rc;
973 }
974
975
976 static void __devexit tc35815_remove_one(struct pci_dev *pdev)
977 {
978 struct net_device *dev = pci_get_drvdata(pdev);
979 struct tc35815_local *lp = netdev_priv(dev);
980
981 phy_disconnect(lp->phy_dev);
982 mdiobus_unregister(lp->mii_bus);
983 kfree(lp->mii_bus->irq);
984 mdiobus_free(lp->mii_bus);
985 unregister_netdev(dev);
986 free_netdev(dev);
987 pci_set_drvdata(pdev, NULL);
988 }
989
990 static int
991 tc35815_init_queues(struct net_device *dev)
992 {
993 struct tc35815_local *lp = netdev_priv(dev);
994 int i;
995 unsigned long fd_addr;
996
997 if (!lp->fd_buf) {
998 BUG_ON(sizeof(struct FDesc) +
999 sizeof(struct BDesc) * RX_BUF_NUM +
1000 sizeof(struct FDesc) * RX_FD_NUM +
1001 sizeof(struct TxFD) * TX_FD_NUM >
1002 PAGE_SIZE * FD_PAGE_NUM);
1003
1004 lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
1005 PAGE_SIZE * FD_PAGE_NUM,
1006 &lp->fd_buf_dma);
1007 if (!lp->fd_buf)
1008 return -ENOMEM;
1009 for (i = 0; i < RX_BUF_NUM; i++) {
1010 #ifdef TC35815_USE_PACKEDBUFFER
1011 lp->data_buf[i] =
1012 alloc_rxbuf_page(lp->pci_dev,
1013 &lp->data_buf_dma[i]);
1014 if (!lp->data_buf[i]) {
1015 while (--i >= 0) {
1016 free_rxbuf_page(lp->pci_dev,
1017 lp->data_buf[i],
1018 lp->data_buf_dma[i]);
1019 lp->data_buf[i] = NULL;
1020 }
1021 pci_free_consistent(lp->pci_dev,
1022 PAGE_SIZE * FD_PAGE_NUM,
1023 lp->fd_buf,
1024 lp->fd_buf_dma);
1025 lp->fd_buf = NULL;
1026 return -ENOMEM;
1027 }
1028 #else
1029 lp->rx_skbs[i].skb =
1030 alloc_rxbuf_skb(dev, lp->pci_dev,
1031 &lp->rx_skbs[i].skb_dma);
1032 if (!lp->rx_skbs[i].skb) {
1033 while (--i >= 0) {
1034 free_rxbuf_skb(lp->pci_dev,
1035 lp->rx_skbs[i].skb,
1036 lp->rx_skbs[i].skb_dma);
1037 lp->rx_skbs[i].skb = NULL;
1038 }
1039 pci_free_consistent(lp->pci_dev,
1040 PAGE_SIZE * FD_PAGE_NUM,
1041 lp->fd_buf,
1042 lp->fd_buf_dma);
1043 lp->fd_buf = NULL;
1044 return -ENOMEM;
1045 }
1046 #endif
1047 }
1048 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
1049 dev->name, lp->fd_buf);
1050 #ifdef TC35815_USE_PACKEDBUFFER
1051 printk(" DataBuf");
1052 for (i = 0; i < RX_BUF_NUM; i++)
1053 printk(" %p", lp->data_buf[i]);
1054 #endif
1055 printk("\n");
1056 } else {
1057 for (i = 0; i < FD_PAGE_NUM; i++)
1058 clear_page((void *)((unsigned long)lp->fd_buf +
1059 i * PAGE_SIZE));
1060 }
1061 fd_addr = (unsigned long)lp->fd_buf;
1062
1063 /* Free Descriptors (for Receive) */
1064 lp->rfd_base = (struct RxFD *)fd_addr;
1065 fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
1066 for (i = 0; i < RX_FD_NUM; i++)
1067 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
1068 lp->rfd_cur = lp->rfd_base;
1069 lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
1070
1071 /* Transmit Descriptors */
1072 lp->tfd_base = (struct TxFD *)fd_addr;
1073 fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
1074 for (i = 0; i < TX_FD_NUM; i++) {
1075 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
1076 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1077 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
1078 }
1079 lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
1080 lp->tfd_start = 0;
1081 lp->tfd_end = 0;
1082
1083 /* Buffer List (for Receive) */
1084 lp->fbl_ptr = (struct FrFD *)fd_addr;
1085 lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
1086 lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
1087 #ifndef TC35815_USE_PACKEDBUFFER
1088 /*
1089 * move all allocated skbs to head of rx_skbs[] array.
1090 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
1091 * tc35815_rx() had failed.
1092 */
1093 lp->fbl_count = 0;
1094 for (i = 0; i < RX_BUF_NUM; i++) {
1095 if (lp->rx_skbs[i].skb) {
1096 if (i != lp->fbl_count) {
1097 lp->rx_skbs[lp->fbl_count].skb =
1098 lp->rx_skbs[i].skb;
1099 lp->rx_skbs[lp->fbl_count].skb_dma =
1100 lp->rx_skbs[i].skb_dma;
1101 }
1102 lp->fbl_count++;
1103 }
1104 }
1105 #endif
1106 for (i = 0; i < RX_BUF_NUM; i++) {
1107 #ifdef TC35815_USE_PACKEDBUFFER
1108 lp->fbl_ptr->bd[i].BuffData = cpu_to_le32(lp->data_buf_dma[i]);
1109 #else
1110 if (i >= lp->fbl_count) {
1111 lp->fbl_ptr->bd[i].BuffData = 0;
1112 lp->fbl_ptr->bd[i].BDCtl = 0;
1113 continue;
1114 }
1115 lp->fbl_ptr->bd[i].BuffData =
1116 cpu_to_le32(lp->rx_skbs[i].skb_dma);
1117 #endif
1118 /* BDID is index of FrFD.bd[] */
1119 lp->fbl_ptr->bd[i].BDCtl =
1120 cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
1121 RX_BUF_SIZE);
1122 }
1123 #ifdef TC35815_USE_PACKEDBUFFER
1124 lp->fbl_curid = 0;
1125 #endif
1126
1127 printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
1128 dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
1129 return 0;
1130 }
1131
1132 static void
1133 tc35815_clear_queues(struct net_device *dev)
1134 {
1135 struct tc35815_local *lp = netdev_priv(dev);
1136 int i;
1137
1138 for (i = 0; i < TX_FD_NUM; i++) {
1139 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1140 struct sk_buff *skb =
1141 fdsystem != 0xffffffff ?
1142 lp->tx_skbs[fdsystem].skb : NULL;
1143 #ifdef DEBUG
1144 if (lp->tx_skbs[i].skb != skb) {
1145 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1146 panic_queues(dev);
1147 }
1148 #else
1149 BUG_ON(lp->tx_skbs[i].skb != skb);
1150 #endif
1151 if (skb) {
1152 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1153 lp->tx_skbs[i].skb = NULL;
1154 lp->tx_skbs[i].skb_dma = 0;
1155 dev_kfree_skb_any(skb);
1156 }
1157 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1158 }
1159
1160 tc35815_init_queues(dev);
1161 }
1162
1163 static void
1164 tc35815_free_queues(struct net_device *dev)
1165 {
1166 struct tc35815_local *lp = netdev_priv(dev);
1167 int i;
1168
1169 if (lp->tfd_base) {
1170 for (i = 0; i < TX_FD_NUM; i++) {
1171 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1172 struct sk_buff *skb =
1173 fdsystem != 0xffffffff ?
1174 lp->tx_skbs[fdsystem].skb : NULL;
1175 #ifdef DEBUG
1176 if (lp->tx_skbs[i].skb != skb) {
1177 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1178 panic_queues(dev);
1179 }
1180 #else
1181 BUG_ON(lp->tx_skbs[i].skb != skb);
1182 #endif
1183 if (skb) {
1184 dev_kfree_skb(skb);
1185 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1186 lp->tx_skbs[i].skb = NULL;
1187 lp->tx_skbs[i].skb_dma = 0;
1188 }
1189 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1190 }
1191 }
1192
1193 lp->rfd_base = NULL;
1194 lp->rfd_limit = NULL;
1195 lp->rfd_cur = NULL;
1196 lp->fbl_ptr = NULL;
1197
1198 for (i = 0; i < RX_BUF_NUM; i++) {
1199 #ifdef TC35815_USE_PACKEDBUFFER
1200 if (lp->data_buf[i]) {
1201 free_rxbuf_page(lp->pci_dev,
1202 lp->data_buf[i], lp->data_buf_dma[i]);
1203 lp->data_buf[i] = NULL;
1204 }
1205 #else
1206 if (lp->rx_skbs[i].skb) {
1207 free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1208 lp->rx_skbs[i].skb_dma);
1209 lp->rx_skbs[i].skb = NULL;
1210 }
1211 #endif
1212 }
1213 if (lp->fd_buf) {
1214 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1215 lp->fd_buf, lp->fd_buf_dma);
1216 lp->fd_buf = NULL;
1217 }
1218 }
1219
1220 static void
1221 dump_txfd(struct TxFD *fd)
1222 {
1223 printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1224 le32_to_cpu(fd->fd.FDNext),
1225 le32_to_cpu(fd->fd.FDSystem),
1226 le32_to_cpu(fd->fd.FDStat),
1227 le32_to_cpu(fd->fd.FDCtl));
1228 printk("BD: ");
1229 printk(" %08x %08x",
1230 le32_to_cpu(fd->bd.BuffData),
1231 le32_to_cpu(fd->bd.BDCtl));
1232 printk("\n");
1233 }
1234
1235 static int
1236 dump_rxfd(struct RxFD *fd)
1237 {
1238 int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1239 if (bd_count > 8)
1240 bd_count = 8;
1241 printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1242 le32_to_cpu(fd->fd.FDNext),
1243 le32_to_cpu(fd->fd.FDSystem),
1244 le32_to_cpu(fd->fd.FDStat),
1245 le32_to_cpu(fd->fd.FDCtl));
1246 if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1247 return 0;
1248 printk("BD: ");
1249 for (i = 0; i < bd_count; i++)
1250 printk(" %08x %08x",
1251 le32_to_cpu(fd->bd[i].BuffData),
1252 le32_to_cpu(fd->bd[i].BDCtl));
1253 printk("\n");
1254 return bd_count;
1255 }
1256
1257 #if defined(DEBUG) || defined(TC35815_USE_PACKEDBUFFER)
1258 static void
1259 dump_frfd(struct FrFD *fd)
1260 {
1261 int i;
1262 printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1263 le32_to_cpu(fd->fd.FDNext),
1264 le32_to_cpu(fd->fd.FDSystem),
1265 le32_to_cpu(fd->fd.FDStat),
1266 le32_to_cpu(fd->fd.FDCtl));
1267 printk("BD: ");
1268 for (i = 0; i < RX_BUF_NUM; i++)
1269 printk(" %08x %08x",
1270 le32_to_cpu(fd->bd[i].BuffData),
1271 le32_to_cpu(fd->bd[i].BDCtl));
1272 printk("\n");
1273 }
1274 #endif
1275
1276 #ifdef DEBUG
1277 static void
1278 panic_queues(struct net_device *dev)
1279 {
1280 struct tc35815_local *lp = netdev_priv(dev);
1281 int i;
1282
1283 printk("TxFD base %p, start %u, end %u\n",
1284 lp->tfd_base, lp->tfd_start, lp->tfd_end);
1285 printk("RxFD base %p limit %p cur %p\n",
1286 lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1287 printk("FrFD %p\n", lp->fbl_ptr);
1288 for (i = 0; i < TX_FD_NUM; i++)
1289 dump_txfd(&lp->tfd_base[i]);
1290 for (i = 0; i < RX_FD_NUM; i++) {
1291 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1292 i += (bd_count + 1) / 2; /* skip BDs */
1293 }
1294 dump_frfd(lp->fbl_ptr);
1295 panic("%s: Illegal queue state.", dev->name);
1296 }
1297 #endif
1298
1299 static void print_eth(const u8 *add)
1300 {
1301 printk(KERN_DEBUG "print_eth(%p)\n", add);
1302 printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1303 add + 6, add, add[12], add[13]);
1304 }
1305
1306 static int tc35815_tx_full(struct net_device *dev)
1307 {
1308 struct tc35815_local *lp = netdev_priv(dev);
1309 return ((lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end);
1310 }
1311
1312 static void tc35815_restart(struct net_device *dev)
1313 {
1314 struct tc35815_local *lp = netdev_priv(dev);
1315
1316 if (lp->phy_dev) {
1317 int timeout;
1318
1319 phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
1320 timeout = 100;
1321 while (--timeout) {
1322 if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
1323 break;
1324 udelay(1);
1325 }
1326 if (!timeout)
1327 printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1328 }
1329
1330 spin_lock_irq(&lp->lock);
1331 tc35815_chip_reset(dev);
1332 tc35815_clear_queues(dev);
1333 tc35815_chip_init(dev);
1334 /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1335 tc35815_set_multicast_list(dev);
1336 spin_unlock_irq(&lp->lock);
1337
1338 netif_wake_queue(dev);
1339 }
1340
1341 static void tc35815_restart_work(struct work_struct *work)
1342 {
1343 struct tc35815_local *lp =
1344 container_of(work, struct tc35815_local, restart_work);
1345 struct net_device *dev = lp->dev;
1346
1347 tc35815_restart(dev);
1348 }
1349
1350 static void tc35815_schedule_restart(struct net_device *dev)
1351 {
1352 struct tc35815_local *lp = netdev_priv(dev);
1353 struct tc35815_regs __iomem *tr =
1354 (struct tc35815_regs __iomem *)dev->base_addr;
1355
1356 /* disable interrupts */
1357 tc_writel(0, &tr->Int_En);
1358 tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1359 schedule_work(&lp->restart_work);
1360 }
1361
1362 static void tc35815_tx_timeout(struct net_device *dev)
1363 {
1364 struct tc35815_regs __iomem *tr =
1365 (struct tc35815_regs __iomem *)dev->base_addr;
1366
1367 printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1368 dev->name, tc_readl(&tr->Tx_Stat));
1369
1370 /* Try to restart the adaptor. */
1371 tc35815_schedule_restart(dev);
1372 dev->stats.tx_errors++;
1373 }
1374
1375 /*
1376 * Open/initialize the controller. This is called (in the current kernel)
1377 * sometime after booting when the 'ifconfig' program is run.
1378 *
1379 * This routine should set everything up anew at each open, even
1380 * registers that "should" only need to be set once at boot, so that
1381 * there is non-reboot way to recover if something goes wrong.
1382 */
1383 static int
1384 tc35815_open(struct net_device *dev)
1385 {
1386 struct tc35815_local *lp = netdev_priv(dev);
1387
1388 /*
1389 * This is used if the interrupt line can turned off (shared).
1390 * See 3c503.c for an example of selecting the IRQ at config-time.
1391 */
1392 if (request_irq(dev->irq, &tc35815_interrupt, IRQF_SHARED,
1393 dev->name, dev))
1394 return -EAGAIN;
1395
1396 tc35815_chip_reset(dev);
1397
1398 if (tc35815_init_queues(dev) != 0) {
1399 free_irq(dev->irq, dev);
1400 return -EAGAIN;
1401 }
1402
1403 #ifdef TC35815_NAPI
1404 napi_enable(&lp->napi);
1405 #endif
1406
1407 /* Reset the hardware here. Don't forget to set the station address. */
1408 spin_lock_irq(&lp->lock);
1409 tc35815_chip_init(dev);
1410 spin_unlock_irq(&lp->lock);
1411
1412 netif_carrier_off(dev);
1413 /* schedule a link state check */
1414 phy_start(lp->phy_dev);
1415
1416 /* We are now ready to accept transmit requeusts from
1417 * the queueing layer of the networking.
1418 */
1419 netif_start_queue(dev);
1420
1421 return 0;
1422 }
1423
1424 /* This will only be invoked if your driver is _not_ in XOFF state.
1425 * What this means is that you need not check it, and that this
1426 * invariant will hold if you make sure that the netif_*_queue()
1427 * calls are done at the proper times.
1428 */
1429 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1430 {
1431 struct tc35815_local *lp = netdev_priv(dev);
1432 struct TxFD *txfd;
1433 unsigned long flags;
1434
1435 /* If some error occurs while trying to transmit this
1436 * packet, you should return '1' from this function.
1437 * In such a case you _may not_ do anything to the
1438 * SKB, it is still owned by the network queueing
1439 * layer when an error is returned. This means you
1440 * may not modify any SKB fields, you may not free
1441 * the SKB, etc.
1442 */
1443
1444 /* This is the most common case for modern hardware.
1445 * The spinlock protects this code from the TX complete
1446 * hardware interrupt handler. Queue flow control is
1447 * thus managed under this lock as well.
1448 */
1449 spin_lock_irqsave(&lp->lock, flags);
1450
1451 /* failsafe... (handle txdone now if half of FDs are used) */
1452 if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1453 TX_FD_NUM / 2)
1454 tc35815_txdone(dev);
1455
1456 if (netif_msg_pktdata(lp))
1457 print_eth(skb->data);
1458 #ifdef DEBUG
1459 if (lp->tx_skbs[lp->tfd_start].skb) {
1460 printk("%s: tx_skbs conflict.\n", dev->name);
1461 panic_queues(dev);
1462 }
1463 #else
1464 BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1465 #endif
1466 lp->tx_skbs[lp->tfd_start].skb = skb;
1467 lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1468
1469 /*add to ring */
1470 txfd = &lp->tfd_base[lp->tfd_start];
1471 txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1472 txfd->bd.BDCtl = cpu_to_le32(skb->len);
1473 txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1474 txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1475
1476 if (lp->tfd_start == lp->tfd_end) {
1477 struct tc35815_regs __iomem *tr =
1478 (struct tc35815_regs __iomem *)dev->base_addr;
1479 /* Start DMA Transmitter. */
1480 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1481 #ifdef GATHER_TXINT
1482 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1483 #endif
1484 if (netif_msg_tx_queued(lp)) {
1485 printk("%s: starting TxFD.\n", dev->name);
1486 dump_txfd(txfd);
1487 }
1488 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1489 } else {
1490 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1491 if (netif_msg_tx_queued(lp)) {
1492 printk("%s: queueing TxFD.\n", dev->name);
1493 dump_txfd(txfd);
1494 }
1495 }
1496 lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1497
1498 dev->trans_start = jiffies;
1499
1500 /* If we just used up the very last entry in the
1501 * TX ring on this device, tell the queueing
1502 * layer to send no more.
1503 */
1504 if (tc35815_tx_full(dev)) {
1505 if (netif_msg_tx_queued(lp))
1506 printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1507 netif_stop_queue(dev);
1508 }
1509
1510 /* When the TX completion hw interrupt arrives, this
1511 * is when the transmit statistics are updated.
1512 */
1513
1514 spin_unlock_irqrestore(&lp->lock, flags);
1515 return NETDEV_TX_OK;
1516 }
1517
1518 #define FATAL_ERROR_INT \
1519 (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1520 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1521 {
1522 static int count;
1523 printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1524 dev->name, status);
1525 if (status & Int_IntPCI)
1526 printk(" IntPCI");
1527 if (status & Int_DmParErr)
1528 printk(" DmParErr");
1529 if (status & Int_IntNRAbt)
1530 printk(" IntNRAbt");
1531 printk("\n");
1532 if (count++ > 100)
1533 panic("%s: Too many fatal errors.", dev->name);
1534 printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1535 /* Try to restart the adaptor. */
1536 tc35815_schedule_restart(dev);
1537 }
1538
1539 #ifdef TC35815_NAPI
1540 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1541 #else
1542 static int tc35815_do_interrupt(struct net_device *dev, u32 status)
1543 #endif
1544 {
1545 struct tc35815_local *lp = netdev_priv(dev);
1546 int ret = -1;
1547
1548 /* Fatal errors... */
1549 if (status & FATAL_ERROR_INT) {
1550 tc35815_fatal_error_interrupt(dev, status);
1551 return 0;
1552 }
1553 /* recoverable errors */
1554 if (status & Int_IntFDAEx) {
1555 if (netif_msg_rx_err(lp))
1556 dev_warn(&dev->dev,
1557 "Free Descriptor Area Exhausted (%#x).\n",
1558 status);
1559 dev->stats.rx_dropped++;
1560 ret = 0;
1561 }
1562 if (status & Int_IntBLEx) {
1563 if (netif_msg_rx_err(lp))
1564 dev_warn(&dev->dev,
1565 "Buffer List Exhausted (%#x).\n",
1566 status);
1567 dev->stats.rx_dropped++;
1568 ret = 0;
1569 }
1570 if (status & Int_IntExBD) {
1571 if (netif_msg_rx_err(lp))
1572 dev_warn(&dev->dev,
1573 "Excessive Buffer Descriptiors (%#x).\n",
1574 status);
1575 dev->stats.rx_length_errors++;
1576 ret = 0;
1577 }
1578
1579 /* normal notification */
1580 if (status & Int_IntMacRx) {
1581 /* Got a packet(s). */
1582 #ifdef TC35815_NAPI
1583 ret = tc35815_rx(dev, limit);
1584 #else
1585 tc35815_rx(dev);
1586 ret = 0;
1587 #endif
1588 lp->lstats.rx_ints++;
1589 }
1590 if (status & Int_IntMacTx) {
1591 /* Transmit complete. */
1592 lp->lstats.tx_ints++;
1593 tc35815_txdone(dev);
1594 netif_wake_queue(dev);
1595 ret = 0;
1596 }
1597 return ret;
1598 }
1599
1600 /*
1601 * The typical workload of the driver:
1602 * Handle the network interface interrupts.
1603 */
1604 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1605 {
1606 struct net_device *dev = dev_id;
1607 struct tc35815_local *lp = netdev_priv(dev);
1608 struct tc35815_regs __iomem *tr =
1609 (struct tc35815_regs __iomem *)dev->base_addr;
1610 #ifdef TC35815_NAPI
1611 u32 dmactl = tc_readl(&tr->DMA_Ctl);
1612
1613 if (!(dmactl & DMA_IntMask)) {
1614 /* disable interrupts */
1615 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1616 if (napi_schedule_prep(&lp->napi))
1617 __napi_schedule(&lp->napi);
1618 else {
1619 printk(KERN_ERR "%s: interrupt taken in poll\n",
1620 dev->name);
1621 BUG();
1622 }
1623 (void)tc_readl(&tr->Int_Src); /* flush */
1624 return IRQ_HANDLED;
1625 }
1626 return IRQ_NONE;
1627 #else
1628 int handled;
1629 u32 status;
1630
1631 spin_lock(&lp->lock);
1632 status = tc_readl(&tr->Int_Src);
1633 /* BLEx, FDAEx will be cleared later */
1634 tc_writel(status & ~(Int_BLEx | Int_FDAEx),
1635 &tr->Int_Src); /* write to clear */
1636 handled = tc35815_do_interrupt(dev, status);
1637 if (status & (Int_BLEx | Int_FDAEx))
1638 tc_writel(status & (Int_BLEx | Int_FDAEx), &tr->Int_Src);
1639 (void)tc_readl(&tr->Int_Src); /* flush */
1640 spin_unlock(&lp->lock);
1641 return IRQ_RETVAL(handled >= 0);
1642 #endif /* TC35815_NAPI */
1643 }
1644
1645 #ifdef CONFIG_NET_POLL_CONTROLLER
1646 static void tc35815_poll_controller(struct net_device *dev)
1647 {
1648 disable_irq(dev->irq);
1649 tc35815_interrupt(dev->irq, dev);
1650 enable_irq(dev->irq);
1651 }
1652 #endif
1653
1654 /* We have a good packet(s), get it/them out of the buffers. */
1655 #ifdef TC35815_NAPI
1656 static int
1657 tc35815_rx(struct net_device *dev, int limit)
1658 #else
1659 static void
1660 tc35815_rx(struct net_device *dev)
1661 #endif
1662 {
1663 struct tc35815_local *lp = netdev_priv(dev);
1664 unsigned int fdctl;
1665 int i;
1666 #ifdef TC35815_NAPI
1667 int received = 0;
1668 #endif
1669
1670 while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1671 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1672 int pkt_len = fdctl & FD_FDLength_MASK;
1673 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1674 #ifdef DEBUG
1675 struct RxFD *next_rfd;
1676 #endif
1677 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1678 pkt_len -= ETH_FCS_LEN;
1679 #endif
1680
1681 if (netif_msg_rx_status(lp))
1682 dump_rxfd(lp->rfd_cur);
1683 if (status & Rx_Good) {
1684 struct sk_buff *skb;
1685 unsigned char *data;
1686 int cur_bd;
1687 #ifdef TC35815_USE_PACKEDBUFFER
1688 int offset;
1689 #endif
1690
1691 #ifdef TC35815_NAPI
1692 if (--limit < 0)
1693 break;
1694 #endif
1695 #ifdef TC35815_USE_PACKEDBUFFER
1696 BUG_ON(bd_count > 2);
1697 skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
1698 if (skb == NULL) {
1699 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n",
1700 dev->name);
1701 dev->stats.rx_dropped++;
1702 break;
1703 }
1704 skb_reserve(skb, NET_IP_ALIGN);
1705
1706 data = skb_put(skb, pkt_len);
1707
1708 /* copy from receive buffer */
1709 cur_bd = 0;
1710 offset = 0;
1711 while (offset < pkt_len && cur_bd < bd_count) {
1712 int len = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BDCtl) &
1713 BD_BuffLength_MASK;
1714 dma_addr_t dma = le32_to_cpu(lp->rfd_cur->bd[cur_bd].BuffData);
1715 void *rxbuf = rxbuf_bus_to_virt(lp, dma);
1716 if (offset + len > pkt_len)
1717 len = pkt_len - offset;
1718 #ifdef TC35815_DMA_SYNC_ONDEMAND
1719 pci_dma_sync_single_for_cpu(lp->pci_dev,
1720 dma, len,
1721 PCI_DMA_FROMDEVICE);
1722 #endif
1723 memcpy(data + offset, rxbuf, len);
1724 #ifdef TC35815_DMA_SYNC_ONDEMAND
1725 pci_dma_sync_single_for_device(lp->pci_dev,
1726 dma, len,
1727 PCI_DMA_FROMDEVICE);
1728 #endif
1729 offset += len;
1730 cur_bd++;
1731 }
1732 #else /* TC35815_USE_PACKEDBUFFER */
1733 BUG_ON(bd_count > 1);
1734 cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1735 & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1736 #ifdef DEBUG
1737 if (cur_bd >= RX_BUF_NUM) {
1738 printk("%s: invalid BDID.\n", dev->name);
1739 panic_queues(dev);
1740 }
1741 BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1742 (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1743 if (!lp->rx_skbs[cur_bd].skb) {
1744 printk("%s: NULL skb.\n", dev->name);
1745 panic_queues(dev);
1746 }
1747 #else
1748 BUG_ON(cur_bd >= RX_BUF_NUM);
1749 #endif
1750 skb = lp->rx_skbs[cur_bd].skb;
1751 prefetch(skb->data);
1752 lp->rx_skbs[cur_bd].skb = NULL;
1753 pci_unmap_single(lp->pci_dev,
1754 lp->rx_skbs[cur_bd].skb_dma,
1755 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1756 if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
1757 memmove(skb->data, skb->data - NET_IP_ALIGN,
1758 pkt_len);
1759 data = skb_put(skb, pkt_len);
1760 #endif /* TC35815_USE_PACKEDBUFFER */
1761 if (netif_msg_pktdata(lp))
1762 print_eth(data);
1763 skb->protocol = eth_type_trans(skb, dev);
1764 #ifdef TC35815_NAPI
1765 netif_receive_skb(skb);
1766 received++;
1767 #else
1768 netif_rx(skb);
1769 #endif
1770 dev->stats.rx_packets++;
1771 dev->stats.rx_bytes += pkt_len;
1772 } else {
1773 dev->stats.rx_errors++;
1774 if (netif_msg_rx_err(lp))
1775 dev_info(&dev->dev, "Rx error (status %x)\n",
1776 status & Rx_Stat_Mask);
1777 /* WORKAROUND: LongErr and CRCErr means Overflow. */
1778 if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1779 status &= ~(Rx_LongErr|Rx_CRCErr);
1780 status |= Rx_Over;
1781 }
1782 if (status & Rx_LongErr)
1783 dev->stats.rx_length_errors++;
1784 if (status & Rx_Over)
1785 dev->stats.rx_fifo_errors++;
1786 if (status & Rx_CRCErr)
1787 dev->stats.rx_crc_errors++;
1788 if (status & Rx_Align)
1789 dev->stats.rx_frame_errors++;
1790 }
1791
1792 if (bd_count > 0) {
1793 /* put Free Buffer back to controller */
1794 int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1795 unsigned char id =
1796 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1797 #ifdef DEBUG
1798 if (id >= RX_BUF_NUM) {
1799 printk("%s: invalid BDID.\n", dev->name);
1800 panic_queues(dev);
1801 }
1802 #else
1803 BUG_ON(id >= RX_BUF_NUM);
1804 #endif
1805 /* free old buffers */
1806 #ifdef TC35815_USE_PACKEDBUFFER
1807 while (lp->fbl_curid != id)
1808 #else
1809 lp->fbl_count--;
1810 while (lp->fbl_count < RX_BUF_NUM)
1811 #endif
1812 {
1813 #ifdef TC35815_USE_PACKEDBUFFER
1814 unsigned char curid = lp->fbl_curid;
1815 #else
1816 unsigned char curid =
1817 (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1818 #endif
1819 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1820 #ifdef DEBUG
1821 bdctl = le32_to_cpu(bd->BDCtl);
1822 if (bdctl & BD_CownsBD) {
1823 printk("%s: Freeing invalid BD.\n",
1824 dev->name);
1825 panic_queues(dev);
1826 }
1827 #endif
1828 /* pass BD to controller */
1829 #ifndef TC35815_USE_PACKEDBUFFER
1830 if (!lp->rx_skbs[curid].skb) {
1831 lp->rx_skbs[curid].skb =
1832 alloc_rxbuf_skb(dev,
1833 lp->pci_dev,
1834 &lp->rx_skbs[curid].skb_dma);
1835 if (!lp->rx_skbs[curid].skb)
1836 break; /* try on next reception */
1837 bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1838 }
1839 #endif /* TC35815_USE_PACKEDBUFFER */
1840 /* Note: BDLength was modified by chip. */
1841 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1842 (curid << BD_RxBDID_SHIFT) |
1843 RX_BUF_SIZE);
1844 #ifdef TC35815_USE_PACKEDBUFFER
1845 lp->fbl_curid = (curid + 1) % RX_BUF_NUM;
1846 if (netif_msg_rx_status(lp)) {
1847 printk("%s: Entering new FBD %d\n",
1848 dev->name, lp->fbl_curid);
1849 dump_frfd(lp->fbl_ptr);
1850 }
1851 #else
1852 lp->fbl_count++;
1853 #endif
1854 }
1855 }
1856
1857 /* put RxFD back to controller */
1858 #ifdef DEBUG
1859 next_rfd = fd_bus_to_virt(lp,
1860 le32_to_cpu(lp->rfd_cur->fd.FDNext));
1861 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1862 printk("%s: RxFD FDNext invalid.\n", dev->name);
1863 panic_queues(dev);
1864 }
1865 #endif
1866 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1867 /* pass FD to controller */
1868 #ifdef DEBUG
1869 lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1870 #else
1871 lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1872 #endif
1873 lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1874 lp->rfd_cur++;
1875 }
1876 if (lp->rfd_cur > lp->rfd_limit)
1877 lp->rfd_cur = lp->rfd_base;
1878 #ifdef DEBUG
1879 if (lp->rfd_cur != next_rfd)
1880 printk("rfd_cur = %p, next_rfd %p\n",
1881 lp->rfd_cur, next_rfd);
1882 #endif
1883 }
1884
1885 #ifdef TC35815_NAPI
1886 return received;
1887 #endif
1888 }
1889
1890 #ifdef TC35815_NAPI
1891 static int tc35815_poll(struct napi_struct *napi, int budget)
1892 {
1893 struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1894 struct net_device *dev = lp->dev;
1895 struct tc35815_regs __iomem *tr =
1896 (struct tc35815_regs __iomem *)dev->base_addr;
1897 int received = 0, handled;
1898 u32 status;
1899
1900 spin_lock(&lp->lock);
1901 status = tc_readl(&tr->Int_Src);
1902 do {
1903 /* BLEx, FDAEx will be cleared later */
1904 tc_writel(status & ~(Int_BLEx | Int_FDAEx),
1905 &tr->Int_Src); /* write to clear */
1906
1907 handled = tc35815_do_interrupt(dev, status, budget - received);
1908 if (status & (Int_BLEx | Int_FDAEx))
1909 tc_writel(status & (Int_BLEx | Int_FDAEx),
1910 &tr->Int_Src);
1911 if (handled >= 0) {
1912 received += handled;
1913 if (received >= budget)
1914 break;
1915 }
1916 status = tc_readl(&tr->Int_Src);
1917 } while (status);
1918 spin_unlock(&lp->lock);
1919
1920 if (received < budget) {
1921 napi_complete(napi);
1922 /* enable interrupts */
1923 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1924 }
1925 return received;
1926 }
1927 #endif
1928
1929 #ifdef NO_CHECK_CARRIER
1930 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1931 #else
1932 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1933 #endif
1934
1935 static void
1936 tc35815_check_tx_stat(struct net_device *dev, int status)
1937 {
1938 struct tc35815_local *lp = netdev_priv(dev);
1939 const char *msg = NULL;
1940
1941 /* count collisions */
1942 if (status & Tx_ExColl)
1943 dev->stats.collisions += 16;
1944 if (status & Tx_TxColl_MASK)
1945 dev->stats.collisions += status & Tx_TxColl_MASK;
1946
1947 #ifndef NO_CHECK_CARRIER
1948 /* TX4939 does not have NCarr */
1949 if (lp->chiptype == TC35815_TX4939)
1950 status &= ~Tx_NCarr;
1951 #ifdef WORKAROUND_LOSTCAR
1952 /* WORKAROUND: ignore LostCrS in full duplex operation */
1953 if (!lp->link || lp->duplex == DUPLEX_FULL)
1954 status &= ~Tx_NCarr;
1955 #endif
1956 #endif
1957
1958 if (!(status & TX_STA_ERR)) {
1959 /* no error. */
1960 dev->stats.tx_packets++;
1961 return;
1962 }
1963
1964 dev->stats.tx_errors++;
1965 if (status & Tx_ExColl) {
1966 dev->stats.tx_aborted_errors++;
1967 msg = "Excessive Collision.";
1968 }
1969 if (status & Tx_Under) {
1970 dev->stats.tx_fifo_errors++;
1971 msg = "Tx FIFO Underrun.";
1972 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1973 lp->lstats.tx_underrun++;
1974 if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1975 struct tc35815_regs __iomem *tr =
1976 (struct tc35815_regs __iomem *)dev->base_addr;
1977 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1978 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1979 }
1980 }
1981 }
1982 if (status & Tx_Defer) {
1983 dev->stats.tx_fifo_errors++;
1984 msg = "Excessive Deferral.";
1985 }
1986 #ifndef NO_CHECK_CARRIER
1987 if (status & Tx_NCarr) {
1988 dev->stats.tx_carrier_errors++;
1989 msg = "Lost Carrier Sense.";
1990 }
1991 #endif
1992 if (status & Tx_LateColl) {
1993 dev->stats.tx_aborted_errors++;
1994 msg = "Late Collision.";
1995 }
1996 if (status & Tx_TxPar) {
1997 dev->stats.tx_fifo_errors++;
1998 msg = "Transmit Parity Error.";
1999 }
2000 if (status & Tx_SQErr) {
2001 dev->stats.tx_heartbeat_errors++;
2002 msg = "Signal Quality Error.";
2003 }
2004 if (msg && netif_msg_tx_err(lp))
2005 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
2006 }
2007
2008 /* This handles TX complete events posted by the device
2009 * via interrupts.
2010 */
2011 static void
2012 tc35815_txdone(struct net_device *dev)
2013 {
2014 struct tc35815_local *lp = netdev_priv(dev);
2015 struct TxFD *txfd;
2016 unsigned int fdctl;
2017
2018 txfd = &lp->tfd_base[lp->tfd_end];
2019 while (lp->tfd_start != lp->tfd_end &&
2020 !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
2021 int status = le32_to_cpu(txfd->fd.FDStat);
2022 struct sk_buff *skb;
2023 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
2024 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
2025
2026 if (netif_msg_tx_done(lp)) {
2027 printk("%s: complete TxFD.\n", dev->name);
2028 dump_txfd(txfd);
2029 }
2030 tc35815_check_tx_stat(dev, status);
2031
2032 skb = fdsystem != 0xffffffff ?
2033 lp->tx_skbs[fdsystem].skb : NULL;
2034 #ifdef DEBUG
2035 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
2036 printk("%s: tx_skbs mismatch.\n", dev->name);
2037 panic_queues(dev);
2038 }
2039 #else
2040 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
2041 #endif
2042 if (skb) {
2043 dev->stats.tx_bytes += skb->len;
2044 pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
2045 lp->tx_skbs[lp->tfd_end].skb = NULL;
2046 lp->tx_skbs[lp->tfd_end].skb_dma = 0;
2047 #ifdef TC35815_NAPI
2048 dev_kfree_skb_any(skb);
2049 #else
2050 dev_kfree_skb_irq(skb);
2051 #endif
2052 }
2053 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
2054
2055 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
2056 txfd = &lp->tfd_base[lp->tfd_end];
2057 #ifdef DEBUG
2058 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
2059 printk("%s: TxFD FDNext invalid.\n", dev->name);
2060 panic_queues(dev);
2061 }
2062 #endif
2063 if (fdnext & FD_Next_EOL) {
2064 /* DMA Transmitter has been stopping... */
2065 if (lp->tfd_end != lp->tfd_start) {
2066 struct tc35815_regs __iomem *tr =
2067 (struct tc35815_regs __iomem *)dev->base_addr;
2068 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
2069 struct TxFD *txhead = &lp->tfd_base[head];
2070 int qlen = (lp->tfd_start + TX_FD_NUM
2071 - lp->tfd_end) % TX_FD_NUM;
2072
2073 #ifdef DEBUG
2074 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
2075 printk("%s: TxFD FDCtl invalid.\n", dev->name);
2076 panic_queues(dev);
2077 }
2078 #endif
2079 /* log max queue length */
2080 if (lp->lstats.max_tx_qlen < qlen)
2081 lp->lstats.max_tx_qlen = qlen;
2082
2083
2084 /* start DMA Transmitter again */
2085 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
2086 #ifdef GATHER_TXINT
2087 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
2088 #endif
2089 if (netif_msg_tx_queued(lp)) {
2090 printk("%s: start TxFD on queue.\n",
2091 dev->name);
2092 dump_txfd(txfd);
2093 }
2094 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
2095 }
2096 break;
2097 }
2098 }
2099
2100 /* If we had stopped the queue due to a "tx full"
2101 * condition, and space has now been made available,
2102 * wake up the queue.
2103 */
2104 if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
2105 netif_wake_queue(dev);
2106 }
2107
2108 /* The inverse routine to tc35815_open(). */
2109 static int
2110 tc35815_close(struct net_device *dev)
2111 {
2112 struct tc35815_local *lp = netdev_priv(dev);
2113
2114 netif_stop_queue(dev);
2115 #ifdef TC35815_NAPI
2116 napi_disable(&lp->napi);
2117 #endif
2118 if (lp->phy_dev)
2119 phy_stop(lp->phy_dev);
2120 cancel_work_sync(&lp->restart_work);
2121
2122 /* Flush the Tx and disable Rx here. */
2123 tc35815_chip_reset(dev);
2124 free_irq(dev->irq, dev);
2125
2126 tc35815_free_queues(dev);
2127
2128 return 0;
2129
2130 }
2131
2132 /*
2133 * Get the current statistics.
2134 * This may be called with the card open or closed.
2135 */
2136 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
2137 {
2138 struct tc35815_regs __iomem *tr =
2139 (struct tc35815_regs __iomem *)dev->base_addr;
2140 if (netif_running(dev))
2141 /* Update the statistics from the device registers. */
2142 dev->stats.rx_missed_errors += tc_readl(&tr->Miss_Cnt);
2143
2144 return &dev->stats;
2145 }
2146
2147 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
2148 {
2149 struct tc35815_local *lp = netdev_priv(dev);
2150 struct tc35815_regs __iomem *tr =
2151 (struct tc35815_regs __iomem *)dev->base_addr;
2152 int cam_index = index * 6;
2153 u32 cam_data;
2154 u32 saved_addr;
2155
2156 saved_addr = tc_readl(&tr->CAM_Adr);
2157
2158 if (netif_msg_hw(lp))
2159 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
2160 dev->name, index, addr);
2161 if (index & 1) {
2162 /* read modify write */
2163 tc_writel(cam_index - 2, &tr->CAM_Adr);
2164 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
2165 cam_data |= addr[0] << 8 | addr[1];
2166 tc_writel(cam_data, &tr->CAM_Data);
2167 /* write whole word */
2168 tc_writel(cam_index + 2, &tr->CAM_Adr);
2169 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
2170 tc_writel(cam_data, &tr->CAM_Data);
2171 } else {
2172 /* write whole word */
2173 tc_writel(cam_index, &tr->CAM_Adr);
2174 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
2175 tc_writel(cam_data, &tr->CAM_Data);
2176 /* read modify write */
2177 tc_writel(cam_index + 4, &tr->CAM_Adr);
2178 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
2179 cam_data |= addr[4] << 24 | (addr[5] << 16);
2180 tc_writel(cam_data, &tr->CAM_Data);
2181 }
2182
2183 tc_writel(saved_addr, &tr->CAM_Adr);
2184 }
2185
2186
2187 /*
2188 * Set or clear the multicast filter for this adaptor.
2189 * num_addrs == -1 Promiscuous mode, receive all packets
2190 * num_addrs == 0 Normal mode, clear multicast list
2191 * num_addrs > 0 Multicast mode, receive normal and MC packets,
2192 * and do best-effort filtering.
2193 */
2194 static void
2195 tc35815_set_multicast_list(struct net_device *dev)
2196 {
2197 struct tc35815_regs __iomem *tr =
2198 (struct tc35815_regs __iomem *)dev->base_addr;
2199
2200 if (dev->flags & IFF_PROMISC) {
2201 #ifdef WORKAROUND_100HALF_PROMISC
2202 /* With some (all?) 100MHalf HUB, controller will hang
2203 * if we enabled promiscuous mode before linkup... */
2204 struct tc35815_local *lp = netdev_priv(dev);
2205
2206 if (!lp->link)
2207 return;
2208 #endif
2209 /* Enable promiscuous mode */
2210 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
2211 } else if ((dev->flags & IFF_ALLMULTI) ||
2212 dev->mc_count > CAM_ENTRY_MAX - 3) {
2213 /* CAM 0, 1, 20 are reserved. */
2214 /* Disable promiscuous mode, use normal mode. */
2215 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
2216 } else if (dev->mc_count) {
2217 struct dev_mc_list *cur_addr = dev->mc_list;
2218 int i;
2219 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
2220
2221 tc_writel(0, &tr->CAM_Ctl);
2222 /* Walk the address list, and load the filter */
2223 for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) {
2224 if (!cur_addr)
2225 break;
2226 /* entry 0,1 is reserved. */
2227 tc35815_set_cam_entry(dev, i + 2, cur_addr->dmi_addr);
2228 ena_bits |= CAM_Ena_Bit(i + 2);
2229 }
2230 tc_writel(ena_bits, &tr->CAM_Ena);
2231 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2232 } else {
2233 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2234 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2235 }
2236 }
2237
2238 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2239 {
2240 struct tc35815_local *lp = netdev_priv(dev);
2241 strcpy(info->driver, MODNAME);
2242 strcpy(info->version, DRV_VERSION);
2243 strcpy(info->bus_info, pci_name(lp->pci_dev));
2244 }
2245
2246 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2247 {
2248 struct tc35815_local *lp = netdev_priv(dev);
2249
2250 if (!lp->phy_dev)
2251 return -ENODEV;
2252 return phy_ethtool_gset(lp->phy_dev, cmd);
2253 }
2254
2255 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2256 {
2257 struct tc35815_local *lp = netdev_priv(dev);
2258
2259 if (!lp->phy_dev)
2260 return -ENODEV;
2261 return phy_ethtool_sset(lp->phy_dev, cmd);
2262 }
2263
2264 static u32 tc35815_get_msglevel(struct net_device *dev)
2265 {
2266 struct tc35815_local *lp = netdev_priv(dev);
2267 return lp->msg_enable;
2268 }
2269
2270 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2271 {
2272 struct tc35815_local *lp = netdev_priv(dev);
2273 lp->msg_enable = datum;
2274 }
2275
2276 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2277 {
2278 struct tc35815_local *lp = netdev_priv(dev);
2279
2280 switch (sset) {
2281 case ETH_SS_STATS:
2282 return sizeof(lp->lstats) / sizeof(int);
2283 default:
2284 return -EOPNOTSUPP;
2285 }
2286 }
2287
2288 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2289 {
2290 struct tc35815_local *lp = netdev_priv(dev);
2291 data[0] = lp->lstats.max_tx_qlen;
2292 data[1] = lp->lstats.tx_ints;
2293 data[2] = lp->lstats.rx_ints;
2294 data[3] = lp->lstats.tx_underrun;
2295 }
2296
2297 static struct {
2298 const char str[ETH_GSTRING_LEN];
2299 } ethtool_stats_keys[] = {
2300 { "max_tx_qlen" },
2301 { "tx_ints" },
2302 { "rx_ints" },
2303 { "tx_underrun" },
2304 };
2305
2306 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2307 {
2308 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2309 }
2310
2311 static const struct ethtool_ops tc35815_ethtool_ops = {
2312 .get_drvinfo = tc35815_get_drvinfo,
2313 .get_settings = tc35815_get_settings,
2314 .set_settings = tc35815_set_settings,
2315 .get_link = ethtool_op_get_link,
2316 .get_msglevel = tc35815_get_msglevel,
2317 .set_msglevel = tc35815_set_msglevel,
2318 .get_strings = tc35815_get_strings,
2319 .get_sset_count = tc35815_get_sset_count,
2320 .get_ethtool_stats = tc35815_get_ethtool_stats,
2321 };
2322
2323 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2324 {
2325 struct tc35815_local *lp = netdev_priv(dev);
2326
2327 if (!netif_running(dev))
2328 return -EINVAL;
2329 if (!lp->phy_dev)
2330 return -ENODEV;
2331 return phy_mii_ioctl(lp->phy_dev, if_mii(rq), cmd);
2332 }
2333
2334 static void tc35815_chip_reset(struct net_device *dev)
2335 {
2336 struct tc35815_regs __iomem *tr =
2337 (struct tc35815_regs __iomem *)dev->base_addr;
2338 int i;
2339 /* reset the controller */
2340 tc_writel(MAC_Reset, &tr->MAC_Ctl);
2341 udelay(4); /* 3200ns */
2342 i = 0;
2343 while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2344 if (i++ > 100) {
2345 printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2346 break;
2347 }
2348 mdelay(1);
2349 }
2350 tc_writel(0, &tr->MAC_Ctl);
2351
2352 /* initialize registers to default value */
2353 tc_writel(0, &tr->DMA_Ctl);
2354 tc_writel(0, &tr->TxThrsh);
2355 tc_writel(0, &tr->TxPollCtr);
2356 tc_writel(0, &tr->RxFragSize);
2357 tc_writel(0, &tr->Int_En);
2358 tc_writel(0, &tr->FDA_Bas);
2359 tc_writel(0, &tr->FDA_Lim);
2360 tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
2361 tc_writel(0, &tr->CAM_Ctl);
2362 tc_writel(0, &tr->Tx_Ctl);
2363 tc_writel(0, &tr->Rx_Ctl);
2364 tc_writel(0, &tr->CAM_Ena);
2365 (void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
2366
2367 /* initialize internal SRAM */
2368 tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2369 for (i = 0; i < 0x1000; i += 4) {
2370 tc_writel(i, &tr->CAM_Adr);
2371 tc_writel(0, &tr->CAM_Data);
2372 }
2373 tc_writel(0, &tr->DMA_Ctl);
2374 }
2375
2376 static void tc35815_chip_init(struct net_device *dev)
2377 {
2378 struct tc35815_local *lp = netdev_priv(dev);
2379 struct tc35815_regs __iomem *tr =
2380 (struct tc35815_regs __iomem *)dev->base_addr;
2381 unsigned long txctl = TX_CTL_CMD;
2382
2383 /* load station address to CAM */
2384 tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2385
2386 /* Enable CAM (broadcast and unicast) */
2387 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2388 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2389
2390 /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2391 if (HAVE_DMA_RXALIGN(lp))
2392 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2393 else
2394 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2395 #ifdef TC35815_USE_PACKEDBUFFER
2396 tc_writel(RxFrag_EnPack | ETH_ZLEN, &tr->RxFragSize); /* Packing */
2397 #endif
2398 tc_writel(0, &tr->TxPollCtr); /* Batch mode */
2399 tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2400 tc_writel(INT_EN_CMD, &tr->Int_En);
2401
2402 /* set queues */
2403 tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2404 tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2405 &tr->FDA_Lim);
2406 /*
2407 * Activation method:
2408 * First, enable the MAC Transmitter and the DMA Receive circuits.
2409 * Then enable the DMA Transmitter and the MAC Receive circuits.
2410 */
2411 tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
2412 tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
2413
2414 /* start MAC transmitter */
2415 #ifndef NO_CHECK_CARRIER
2416 /* TX4939 does not have EnLCarr */
2417 if (lp->chiptype == TC35815_TX4939)
2418 txctl &= ~Tx_EnLCarr;
2419 #ifdef WORKAROUND_LOSTCAR
2420 /* WORKAROUND: ignore LostCrS in full duplex operation */
2421 if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
2422 txctl &= ~Tx_EnLCarr;
2423 #endif
2424 #endif /* !NO_CHECK_CARRIER */
2425 #ifdef GATHER_TXINT
2426 txctl &= ~Tx_EnComp; /* disable global tx completion int. */
2427 #endif
2428 tc_writel(txctl, &tr->Tx_Ctl);
2429 }
2430
2431 #ifdef CONFIG_PM
2432 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2433 {
2434 struct net_device *dev = pci_get_drvdata(pdev);
2435 struct tc35815_local *lp = netdev_priv(dev);
2436 unsigned long flags;
2437
2438 pci_save_state(pdev);
2439 if (!netif_running(dev))
2440 return 0;
2441 netif_device_detach(dev);
2442 if (lp->phy_dev)
2443 phy_stop(lp->phy_dev);
2444 spin_lock_irqsave(&lp->lock, flags);
2445 tc35815_chip_reset(dev);
2446 spin_unlock_irqrestore(&lp->lock, flags);
2447 pci_set_power_state(pdev, PCI_D3hot);
2448 return 0;
2449 }
2450
2451 static int tc35815_resume(struct pci_dev *pdev)
2452 {
2453 struct net_device *dev = pci_get_drvdata(pdev);
2454 struct tc35815_local *lp = netdev_priv(dev);
2455
2456 pci_restore_state(pdev);
2457 if (!netif_running(dev))
2458 return 0;
2459 pci_set_power_state(pdev, PCI_D0);
2460 tc35815_restart(dev);
2461 netif_carrier_off(dev);
2462 if (lp->phy_dev)
2463 phy_start(lp->phy_dev);
2464 netif_device_attach(dev);
2465 return 0;
2466 }
2467 #endif /* CONFIG_PM */
2468
2469 static struct pci_driver tc35815_pci_driver = {
2470 .name = MODNAME,
2471 .id_table = tc35815_pci_tbl,
2472 .probe = tc35815_init_one,
2473 .remove = __devexit_p(tc35815_remove_one),
2474 #ifdef CONFIG_PM
2475 .suspend = tc35815_suspend,
2476 .resume = tc35815_resume,
2477 #endif
2478 };
2479
2480 module_param_named(speed, options.speed, int, 0);
2481 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2482 module_param_named(duplex, options.duplex, int, 0);
2483 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2484
2485 static int __init tc35815_init_module(void)
2486 {
2487 return pci_register_driver(&tc35815_pci_driver);
2488 }
2489
2490 static void __exit tc35815_cleanup_module(void)
2491 {
2492 pci_unregister_driver(&tc35815_pci_driver);
2493 }
2494
2495 module_init(tc35815_init_module);
2496 module_exit(tc35815_cleanup_module);
2497
2498 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2499 MODULE_LICENSE("GPL");
Linux for Ginger Game Console