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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / toshiba / tc35815.c
blob71b785cd756368aa2a2c4972e7a9cc9ae9506408
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 #define DRV_VERSION "1.39"
26 static const char *version = "tc35815.c:v" DRV_VERSION "\n";
27 #define MODNAME "tc35815"
28
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/fcntl.h>
33 #include <linux/interrupt.h>
34 #include <linux/ioport.h>
35 #include <linux/in.h>
36 #include <linux/if_vlan.h>
37 #include <linux/slab.h>
38 #include <linux/string.h>
39 #include <linux/spinlock.h>
40 #include <linux/errno.h>
41 #include <linux/init.h>
42 #include <linux/netdevice.h>
43 #include <linux/etherdevice.h>
44 #include <linux/skbuff.h>
45 #include <linux/delay.h>
46 #include <linux/pci.h>
47 #include <linux/phy.h>
48 #include <linux/workqueue.h>
49 #include <linux/platform_device.h>
50 #include <linux/prefetch.h>
51 #include <asm/io.h>
52 #include <asm/byteorder.h>
53
54 enum tc35815_chiptype {
55 TC35815CF = 0,
56 TC35815_NWU,
57 TC35815_TX4939,
58 };
59
60 /* indexed by tc35815_chiptype, above */
61 static const struct {
62 const char *name;
63 } chip_info[] __devinitdata = {
64 { "TOSHIBA TC35815CF 10/100BaseTX" },
65 { "TOSHIBA TC35815 with Wake on LAN" },
66 { "TOSHIBA TC35815/TX4939" },
67 };
68
69 static DEFINE_PCI_DEVICE_TABLE(tc35815_pci_tbl) = {
70 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
71 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
72 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
73 {0,}
74 };
75 MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
76
77 /* see MODULE_PARM_DESC */
78 static struct tc35815_options {
79 int speed;
80 int duplex;
81 } options;
82
83 /*
84 * Registers
85 */
86 struct tc35815_regs {
87 __u32 DMA_Ctl; /* 0x00 */
88 __u32 TxFrmPtr;
89 __u32 TxThrsh;
90 __u32 TxPollCtr;
91 __u32 BLFrmPtr;
92 __u32 RxFragSize;
93 __u32 Int_En;
94 __u32 FDA_Bas;
95 __u32 FDA_Lim; /* 0x20 */
96 __u32 Int_Src;
97 __u32 unused0[2];
98 __u32 PauseCnt;
99 __u32 RemPauCnt;
100 __u32 TxCtlFrmStat;
101 __u32 unused1;
102 __u32 MAC_Ctl; /* 0x40 */
103 __u32 CAM_Ctl;
104 __u32 Tx_Ctl;
105 __u32 Tx_Stat;
106 __u32 Rx_Ctl;
107 __u32 Rx_Stat;
108 __u32 MD_Data;
109 __u32 MD_CA;
110 __u32 CAM_Adr; /* 0x60 */
111 __u32 CAM_Data;
112 __u32 CAM_Ena;
113 __u32 PROM_Ctl;
114 __u32 PROM_Data;
115 __u32 Algn_Cnt;
116 __u32 CRC_Cnt;
117 __u32 Miss_Cnt;
118 };
119
120 /*
121 * Bit assignments
122 */
123 /* DMA_Ctl bit assign ------------------------------------------------------- */
124 #define DMA_RxAlign 0x00c00000 /* 1:Reception Alignment */
125 #define DMA_RxAlign_1 0x00400000
126 #define DMA_RxAlign_2 0x00800000
127 #define DMA_RxAlign_3 0x00c00000
128 #define DMA_M66EnStat 0x00080000 /* 1:66MHz Enable State */
129 #define DMA_IntMask 0x00040000 /* 1:Interrupt mask */
130 #define DMA_SWIntReq 0x00020000 /* 1:Software Interrupt request */
131 #define DMA_TxWakeUp 0x00010000 /* 1:Transmit Wake Up */
132 #define DMA_RxBigE 0x00008000 /* 1:Receive Big Endian */
133 #define DMA_TxBigE 0x00004000 /* 1:Transmit Big Endian */
134 #define DMA_TestMode 0x00002000 /* 1:Test Mode */
135 #define DMA_PowrMgmnt 0x00001000 /* 1:Power Management */
136 #define DMA_DmBurst_Mask 0x000001fc /* DMA Burst size */
137
138 /* RxFragSize bit assign ---------------------------------------------------- */
139 #define RxFrag_EnPack 0x00008000 /* 1:Enable Packing */
140 #define RxFrag_MinFragMask 0x00000ffc /* Minimum Fragment */
141
142 /* MAC_Ctl bit assign ------------------------------------------------------- */
143 #define MAC_Link10 0x00008000 /* 1:Link Status 10Mbits */
144 #define MAC_EnMissRoll 0x00002000 /* 1:Enable Missed Roll */
145 #define MAC_MissRoll 0x00000400 /* 1:Missed Roll */
146 #define MAC_Loop10 0x00000080 /* 1:Loop 10 Mbps */
147 #define MAC_Conn_Auto 0x00000000 /*00:Connection mode (Automatic) */
148 #define MAC_Conn_10M 0x00000020 /*01: (10Mbps endec)*/
149 #define MAC_Conn_Mll 0x00000040 /*10: (Mll clock) */
150 #define MAC_MacLoop 0x00000010 /* 1:MAC Loopback */
151 #define MAC_FullDup 0x00000008 /* 1:Full Duplex 0:Half Duplex */
152 #define MAC_Reset 0x00000004 /* 1:Software Reset */
153 #define MAC_HaltImm 0x00000002 /* 1:Halt Immediate */
154 #define MAC_HaltReq 0x00000001 /* 1:Halt request */
155
156 /* PROM_Ctl bit assign ------------------------------------------------------ */
157 #define PROM_Busy 0x00008000 /* 1:Busy (Start Operation) */
158 #define PROM_Read 0x00004000 /*10:Read operation */
159 #define PROM_Write 0x00002000 /*01:Write operation */
160 #define PROM_Erase 0x00006000 /*11:Erase operation */
161 /*00:Enable or Disable Writting, */
162 /* as specified in PROM_Addr. */
163 #define PROM_Addr_Ena 0x00000030 /*11xxxx:PROM Write enable */
164 /*00xxxx: disable */
165
166 /* CAM_Ctl bit assign ------------------------------------------------------- */
167 #define CAM_CompEn 0x00000010 /* 1:CAM Compare Enable */
168 #define CAM_NegCAM 0x00000008 /* 1:Reject packets CAM recognizes,*/
169 /* accept other */
170 #define CAM_BroadAcc 0x00000004 /* 1:Broadcast assept */
171 #define CAM_GroupAcc 0x00000002 /* 1:Multicast assept */
172 #define CAM_StationAcc 0x00000001 /* 1:unicast accept */
173
174 /* CAM_Ena bit assign ------------------------------------------------------- */
175 #define CAM_ENTRY_MAX 21 /* CAM Data entry max count */
176 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits) */
177 #define CAM_Ena_Bit(index) (1 << (index))
178 #define CAM_ENTRY_DESTINATION 0
179 #define CAM_ENTRY_SOURCE 1
180 #define CAM_ENTRY_MACCTL 20
181
182 /* Tx_Ctl bit assign -------------------------------------------------------- */
183 #define Tx_En 0x00000001 /* 1:Transmit enable */
184 #define Tx_TxHalt 0x00000002 /* 1:Transmit Halt Request */
185 #define Tx_NoPad 0x00000004 /* 1:Suppress Padding */
186 #define Tx_NoCRC 0x00000008 /* 1:Suppress Padding */
187 #define Tx_FBack 0x00000010 /* 1:Fast Back-off */
188 #define Tx_EnUnder 0x00000100 /* 1:Enable Underrun */
189 #define Tx_EnExDefer 0x00000200 /* 1:Enable Excessive Deferral */
190 #define Tx_EnLCarr 0x00000400 /* 1:Enable Lost Carrier */
191 #define Tx_EnExColl 0x00000800 /* 1:Enable Excessive Collision */
192 #define Tx_EnLateColl 0x00001000 /* 1:Enable Late Collision */
193 #define Tx_EnTxPar 0x00002000 /* 1:Enable Transmit Parity */
194 #define Tx_EnComp 0x00004000 /* 1:Enable Completion */
195
196 /* Tx_Stat bit assign ------------------------------------------------------- */
197 #define Tx_TxColl_MASK 0x0000000F /* Tx Collision Count */
198 #define Tx_ExColl 0x00000010 /* Excessive Collision */
199 #define Tx_TXDefer 0x00000020 /* Transmit Defered */
200 #define Tx_Paused 0x00000040 /* Transmit Paused */
201 #define Tx_IntTx 0x00000080 /* Interrupt on Tx */
202 #define Tx_Under 0x00000100 /* Underrun */
203 #define Tx_Defer 0x00000200 /* Deferral */
204 #define Tx_NCarr 0x00000400 /* No Carrier */
205 #define Tx_10Stat 0x00000800 /* 10Mbps Status */
206 #define Tx_LateColl 0x00001000 /* Late Collision */
207 #define Tx_TxPar 0x00002000 /* Tx Parity Error */
208 #define Tx_Comp 0x00004000 /* Completion */
209 #define Tx_Halted 0x00008000 /* Tx Halted */
210 #define Tx_SQErr 0x00010000 /* Signal Quality Error(SQE) */
211
212 /* Rx_Ctl bit assign -------------------------------------------------------- */
213 #define Rx_EnGood 0x00004000 /* 1:Enable Good */
214 #define Rx_EnRxPar 0x00002000 /* 1:Enable Receive Parity */
215 #define Rx_EnLongErr 0x00000800 /* 1:Enable Long Error */
216 #define Rx_EnOver 0x00000400 /* 1:Enable OverFlow */
217 #define Rx_EnCRCErr 0x00000200 /* 1:Enable CRC Error */
218 #define Rx_EnAlign 0x00000100 /* 1:Enable Alignment */
219 #define Rx_IgnoreCRC 0x00000040 /* 1:Ignore CRC Value */
220 #define Rx_StripCRC 0x00000010 /* 1:Strip CRC Value */
221 #define Rx_ShortEn 0x00000008 /* 1:Short Enable */
222 #define Rx_LongEn 0x00000004 /* 1:Long Enable */
223 #define Rx_RxHalt 0x00000002 /* 1:Receive Halt Request */
224 #define Rx_RxEn 0x00000001 /* 1:Receive Intrrupt Enable */
225
226 /* Rx_Stat bit assign ------------------------------------------------------- */
227 #define Rx_Halted 0x00008000 /* Rx Halted */
228 #define Rx_Good 0x00004000 /* Rx Good */
229 #define Rx_RxPar 0x00002000 /* Rx Parity Error */
230 #define Rx_TypePkt 0x00001000 /* Rx Type Packet */
231 #define Rx_LongErr 0x00000800 /* Rx Long Error */
232 #define Rx_Over 0x00000400 /* Rx Overflow */
233 #define Rx_CRCErr 0x00000200 /* Rx CRC Error */
234 #define Rx_Align 0x00000100 /* Rx Alignment Error */
235 #define Rx_10Stat 0x00000080 /* Rx 10Mbps Status */
236 #define Rx_IntRx 0x00000040 /* Rx Interrupt */
237 #define Rx_CtlRecd 0x00000020 /* Rx Control Receive */
238 #define Rx_InLenErr 0x00000010 /* Rx In Range Frame Length Error */
239
240 #define Rx_Stat_Mask 0x0000FFF0 /* Rx All Status Mask */
241
242 /* Int_En bit assign -------------------------------------------------------- */
243 #define Int_NRAbtEn 0x00000800 /* 1:Non-recoverable Abort Enable */
244 #define Int_TxCtlCmpEn 0x00000400 /* 1:Transmit Ctl Complete Enable */
245 #define Int_DmParErrEn 0x00000200 /* 1:DMA Parity Error Enable */
246 #define Int_DParDEn 0x00000100 /* 1:Data Parity Error Enable */
247 #define Int_EarNotEn 0x00000080 /* 1:Early Notify Enable */
248 #define Int_DParErrEn 0x00000040 /* 1:Detected Parity Error Enable */
249 #define Int_SSysErrEn 0x00000020 /* 1:Signalled System Error Enable */
250 #define Int_RMasAbtEn 0x00000010 /* 1:Received Master Abort Enable */
251 #define Int_RTargAbtEn 0x00000008 /* 1:Received Target Abort Enable */
252 #define Int_STargAbtEn 0x00000004 /* 1:Signalled Target Abort Enable */
253 #define Int_BLExEn 0x00000002 /* 1:Buffer List Exhausted Enable */
254 #define Int_FDAExEn 0x00000001 /* 1:Free Descriptor Area */
255 /* Exhausted Enable */
256
257 /* Int_Src bit assign ------------------------------------------------------- */
258 #define Int_NRabt 0x00004000 /* 1:Non Recoverable error */
259 #define Int_DmParErrStat 0x00002000 /* 1:DMA Parity Error & Clear */
260 #define Int_BLEx 0x00001000 /* 1:Buffer List Empty & Clear */
261 #define Int_FDAEx 0x00000800 /* 1:FDA Empty & Clear */
262 #define Int_IntNRAbt 0x00000400 /* 1:Non Recoverable Abort */
263 #define Int_IntCmp 0x00000200 /* 1:MAC control packet complete */
264 #define Int_IntExBD 0x00000100 /* 1:Interrupt Extra BD & Clear */
265 #define Int_DmParErr 0x00000080 /* 1:DMA Parity Error & Clear */
266 #define Int_IntEarNot 0x00000040 /* 1:Receive Data write & Clear */
267 #define Int_SWInt 0x00000020 /* 1:Software request & Clear */
268 #define Int_IntBLEx 0x00000010 /* 1:Buffer List Empty & Clear */
269 #define Int_IntFDAEx 0x00000008 /* 1:FDA Empty & Clear */
270 #define Int_IntPCI 0x00000004 /* 1:PCI controller & Clear */
271 #define Int_IntMacRx 0x00000002 /* 1:Rx controller & Clear */
272 #define Int_IntMacTx 0x00000001 /* 1:Tx controller & Clear */
273
274 /* MD_CA bit assign --------------------------------------------------------- */
275 #define MD_CA_PreSup 0x00001000 /* 1:Preamble Suppress */
276 #define MD_CA_Busy 0x00000800 /* 1:Busy (Start Operation) */
277 #define MD_CA_Wr 0x00000400 /* 1:Write 0:Read */
278
279
280 /*
281 * Descriptors
282 */
283
284 /* Frame descripter */
285 struct FDesc {
286 volatile __u32 FDNext;
287 volatile __u32 FDSystem;
288 volatile __u32 FDStat;
289 volatile __u32 FDCtl;
290 };
291
292 /* Buffer descripter */
293 struct BDesc {
294 volatile __u32 BuffData;
295 volatile __u32 BDCtl;
296 };
297
298 #define FD_ALIGN 16
299
300 /* Frame Descripter bit assign ---------------------------------------------- */
301 #define FD_FDLength_MASK 0x0000FFFF /* Length MASK */
302 #define FD_BDCnt_MASK 0x001F0000 /* BD count MASK in FD */
303 #define FD_FrmOpt_MASK 0x7C000000 /* Frame option MASK */
304 #define FD_FrmOpt_BigEndian 0x40000000 /* Tx/Rx */
305 #define FD_FrmOpt_IntTx 0x20000000 /* Tx only */
306 #define FD_FrmOpt_NoCRC 0x10000000 /* Tx only */
307 #define FD_FrmOpt_NoPadding 0x08000000 /* Tx only */
308 #define FD_FrmOpt_Packing 0x04000000 /* Rx only */
309 #define FD_CownsFD 0x80000000 /* FD Controller owner bit */
310 #define FD_Next_EOL 0x00000001 /* FD EOL indicator */
311 #define FD_BDCnt_SHIFT 16
312
313 /* Buffer Descripter bit assign --------------------------------------------- */
314 #define BD_BuffLength_MASK 0x0000FFFF /* Receive Data Size */
315 #define BD_RxBDID_MASK 0x00FF0000 /* BD ID Number MASK */
316 #define BD_RxBDSeqN_MASK 0x7F000000 /* Rx BD Sequence Number */
317 #define BD_CownsBD 0x80000000 /* BD Controller owner bit */
318 #define BD_RxBDID_SHIFT 16
319 #define BD_RxBDSeqN_SHIFT 24
320
321
322 /* Some useful constants. */
323
324 #define TX_CTL_CMD (Tx_EnTxPar | Tx_EnLateColl | \
325 Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
326 Tx_En) /* maybe 0x7b01 */
327 /* Do not use Rx_StripCRC -- it causes trouble on BLEx/FDAEx condition */
328 #define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
329 | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
330 #define INT_EN_CMD (Int_NRAbtEn | \
331 Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
332 Int_SSysErrEn | Int_RMasAbtEn | Int_RTargAbtEn | \
333 Int_STargAbtEn | \
334 Int_BLExEn | Int_FDAExEn) /* maybe 0xb7f*/
335 #define DMA_CTL_CMD DMA_BURST_SIZE
336 #define HAVE_DMA_RXALIGN(lp) likely((lp)->chiptype != TC35815CF)
337
338 /* Tuning parameters */
339 #define DMA_BURST_SIZE 32
340 #define TX_THRESHOLD 1024
341 /* used threshold with packet max byte for low pci transfer ability.*/
342 #define TX_THRESHOLD_MAX 1536
343 /* setting threshold max value when overrun error occurred this count. */
344 #define TX_THRESHOLD_KEEP_LIMIT 10
345
346 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
347 #define FD_PAGE_NUM 4
348 #define RX_BUF_NUM 128 /* < 256 */
349 #define RX_FD_NUM 256 /* >= 32 */
350 #define TX_FD_NUM 128
351 #if RX_CTL_CMD & Rx_LongEn
352 #define RX_BUF_SIZE PAGE_SIZE
353 #elif RX_CTL_CMD & Rx_StripCRC
354 #define RX_BUF_SIZE \
355 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
356 #else
357 #define RX_BUF_SIZE \
358 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
359 #endif
360 #define RX_FD_RESERVE (2 / 2) /* max 2 BD per RxFD */
361 #define NAPI_WEIGHT 16
362
363 struct TxFD {
364 struct FDesc fd;
365 struct BDesc bd;
366 struct BDesc unused;
367 };
368
369 struct RxFD {
370 struct FDesc fd;
371 struct BDesc bd[0]; /* variable length */
372 };
373
374 struct FrFD {
375 struct FDesc fd;
376 struct BDesc bd[RX_BUF_NUM];
377 };
378
379
380 #define tc_readl(addr) ioread32(addr)
381 #define tc_writel(d, addr) iowrite32(d, addr)
382
383 #define TC35815_TX_TIMEOUT msecs_to_jiffies(400)
384
385 /* Information that need to be kept for each controller. */
386 struct tc35815_local {
387 struct pci_dev *pci_dev;
388
389 struct net_device *dev;
390 struct napi_struct napi;
391
392 /* statistics */
393 struct {
394 int max_tx_qlen;
395 int tx_ints;
396 int rx_ints;
397 int tx_underrun;
398 } lstats;
399
400 /* Tx control lock. This protects the transmit buffer ring
401 * state along with the "tx full" state of the driver. This
402 * means all netif_queue flow control actions are protected
403 * by this lock as well.
404 */
405 spinlock_t lock;
406 spinlock_t rx_lock;
407
408 struct mii_bus *mii_bus;
409 struct phy_device *phy_dev;
410 int duplex;
411 int speed;
412 int link;
413 struct work_struct restart_work;
414
415 /*
416 * Transmitting: Batch Mode.
417 * 1 BD in 1 TxFD.
418 * Receiving: Non-Packing Mode.
419 * 1 circular FD for Free Buffer List.
420 * RX_BUF_NUM BD in Free Buffer FD.
421 * One Free Buffer BD has ETH_FRAME_LEN data buffer.
422 */
423 void *fd_buf; /* for TxFD, RxFD, FrFD */
424 dma_addr_t fd_buf_dma;
425 struct TxFD *tfd_base;
426 unsigned int tfd_start;
427 unsigned int tfd_end;
428 struct RxFD *rfd_base;
429 struct RxFD *rfd_limit;
430 struct RxFD *rfd_cur;
431 struct FrFD *fbl_ptr;
432 unsigned int fbl_count;
433 struct {
434 struct sk_buff *skb;
435 dma_addr_t skb_dma;
436 } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
437 u32 msg_enable;
438 enum tc35815_chiptype chiptype;
439 };
440
441 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
442 {
443 return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
444 }
445 #ifdef DEBUG
446 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
447 {
448 return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
449 }
450 #endif
451 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
452 struct pci_dev *hwdev,
453 dma_addr_t *dma_handle)
454 {
455 struct sk_buff *skb;
456 skb = dev_alloc_skb(RX_BUF_SIZE);
457 if (!skb)
458 return NULL;
459 *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
460 PCI_DMA_FROMDEVICE);
461 if (pci_dma_mapping_error(hwdev, *dma_handle)) {
462 dev_kfree_skb_any(skb);
463 return NULL;
464 }
465 skb_reserve(skb, 2); /* make IP header 4byte aligned */
466 return skb;
467 }
468
469 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
470 {
471 pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
472 PCI_DMA_FROMDEVICE);
473 dev_kfree_skb_any(skb);
474 }
475
476 /* Index to functions, as function prototypes. */
477
478 static int tc35815_open(struct net_device *dev);
479 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
480 static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
481 static int tc35815_rx(struct net_device *dev, int limit);
482 static int tc35815_poll(struct napi_struct *napi, int budget);
483 static void tc35815_txdone(struct net_device *dev);
484 static int tc35815_close(struct net_device *dev);
485 static struct net_device_stats *tc35815_get_stats(struct net_device *dev);
486 static void tc35815_set_multicast_list(struct net_device *dev);
487 static void tc35815_tx_timeout(struct net_device *dev);
488 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
489 #ifdef CONFIG_NET_POLL_CONTROLLER
490 static void tc35815_poll_controller(struct net_device *dev);
491 #endif
492 static const struct ethtool_ops tc35815_ethtool_ops;
493
494 /* Example routines you must write ;->. */
495 static void tc35815_chip_reset(struct net_device *dev);
496 static void tc35815_chip_init(struct net_device *dev);
497
498 #ifdef DEBUG
499 static void panic_queues(struct net_device *dev);
500 #endif
501
502 static void tc35815_restart_work(struct work_struct *work);
503
504 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
505 {
506 struct net_device *dev = bus->priv;
507 struct tc35815_regs __iomem *tr =
508 (struct tc35815_regs __iomem *)dev->base_addr;
509 unsigned long timeout = jiffies + HZ;
510
511 tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
512 udelay(12); /* it takes 32 x 400ns at least */
513 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
514 if (time_after(jiffies, timeout))
515 return -EIO;
516 cpu_relax();
517 }
518 return tc_readl(&tr->MD_Data) & 0xffff;
519 }
520
521 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
522 {
523 struct net_device *dev = bus->priv;
524 struct tc35815_regs __iomem *tr =
525 (struct tc35815_regs __iomem *)dev->base_addr;
526 unsigned long timeout = jiffies + HZ;
527
528 tc_writel(val, &tr->MD_Data);
529 tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
530 &tr->MD_CA);
531 udelay(12); /* it takes 32 x 400ns at least */
532 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
533 if (time_after(jiffies, timeout))
534 return -EIO;
535 cpu_relax();
536 }
537 return 0;
538 }
539
540 static void tc_handle_link_change(struct net_device *dev)
541 {
542 struct tc35815_local *lp = netdev_priv(dev);
543 struct phy_device *phydev = lp->phy_dev;
544 unsigned long flags;
545 int status_change = 0;
546
547 spin_lock_irqsave(&lp->lock, flags);
548 if (phydev->link &&
549 (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
550 struct tc35815_regs __iomem *tr =
551 (struct tc35815_regs __iomem *)dev->base_addr;
552 u32 reg;
553
554 reg = tc_readl(&tr->MAC_Ctl);
555 reg |= MAC_HaltReq;
556 tc_writel(reg, &tr->MAC_Ctl);
557 if (phydev->duplex == DUPLEX_FULL)
558 reg |= MAC_FullDup;
559 else
560 reg &= ~MAC_FullDup;
561 tc_writel(reg, &tr->MAC_Ctl);
562 reg &= ~MAC_HaltReq;
563 tc_writel(reg, &tr->MAC_Ctl);
564
565 /*
566 * TX4939 PCFG.SPEEDn bit will be changed on
567 * NETDEV_CHANGE event.
568 */
569 /*
570 * WORKAROUND: enable LostCrS only if half duplex
571 * operation.
572 * (TX4939 does not have EnLCarr)
573 */
574 if (phydev->duplex == DUPLEX_HALF &&
575 lp->chiptype != TC35815_TX4939)
576 tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
577 &tr->Tx_Ctl);
578
579 lp->speed = phydev->speed;
580 lp->duplex = phydev->duplex;
581 status_change = 1;
582 }
583
584 if (phydev->link != lp->link) {
585 if (phydev->link) {
586 /* delayed promiscuous enabling */
587 if (dev->flags & IFF_PROMISC)
588 tc35815_set_multicast_list(dev);
589 } else {
590 lp->speed = 0;
591 lp->duplex = -1;
592 }
593 lp->link = phydev->link;
594
595 status_change = 1;
596 }
597 spin_unlock_irqrestore(&lp->lock, flags);
598
599 if (status_change && netif_msg_link(lp)) {
600 phy_print_status(phydev);
601 pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
602 dev->name,
603 phy_read(phydev, MII_BMCR),
604 phy_read(phydev, MII_BMSR),
605 phy_read(phydev, MII_LPA));
606 }
607 }
608
609 static int tc_mii_probe(struct net_device *dev)
610 {
611 struct tc35815_local *lp = netdev_priv(dev);
612 struct phy_device *phydev = NULL;
613 int phy_addr;
614 u32 dropmask;
615
616 /* find the first phy */
617 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
618 if (lp->mii_bus->phy_map[phy_addr]) {
619 if (phydev) {
620 printk(KERN_ERR "%s: multiple PHYs found\n",
621 dev->name);
622 return -EINVAL;
623 }
624 phydev = lp->mii_bus->phy_map[phy_addr];
625 break;
626 }
627 }
628
629 if (!phydev) {
630 printk(KERN_ERR "%s: no PHY found\n", dev->name);
631 return -ENODEV;
632 }
633
634 /* attach the mac to the phy */
635 phydev = phy_connect(dev, dev_name(&phydev->dev),
636 &tc_handle_link_change, 0,
637 lp->chiptype == TC35815_TX4939 ?
638 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
639 if (IS_ERR(phydev)) {
640 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
641 return PTR_ERR(phydev);
642 }
643 printk(KERN_INFO "%s: attached PHY driver [%s] "
644 "(mii_bus:phy_addr=%s, id=%x)\n",
645 dev->name, phydev->drv->name, dev_name(&phydev->dev),
646 phydev->phy_id);
647
648 /* mask with MAC supported features */
649 phydev->supported &= PHY_BASIC_FEATURES;
650 dropmask = 0;
651 if (options.speed == 10)
652 dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
653 else if (options.speed == 100)
654 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
655 if (options.duplex == 1)
656 dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
657 else if (options.duplex == 2)
658 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
659 phydev->supported &= ~dropmask;
660 phydev->advertising = phydev->supported;
661
662 lp->link = 0;
663 lp->speed = 0;
664 lp->duplex = -1;
665 lp->phy_dev = phydev;
666
667 return 0;
668 }
669
670 static int tc_mii_init(struct net_device *dev)
671 {
672 struct tc35815_local *lp = netdev_priv(dev);
673 int err;
674 int i;
675
676 lp->mii_bus = mdiobus_alloc();
677 if (lp->mii_bus == NULL) {
678 err = -ENOMEM;
679 goto err_out;
680 }
681
682 lp->mii_bus->name = "tc35815_mii_bus";
683 lp->mii_bus->read = tc_mdio_read;
684 lp->mii_bus->write = tc_mdio_write;
685 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
686 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
687 lp->mii_bus->priv = dev;
688 lp->mii_bus->parent = &lp->pci_dev->dev;
689 lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
690 if (!lp->mii_bus->irq) {
691 err = -ENOMEM;
692 goto err_out_free_mii_bus;
693 }
694
695 for (i = 0; i < PHY_MAX_ADDR; i++)
696 lp->mii_bus->irq[i] = PHY_POLL;
697
698 err = mdiobus_register(lp->mii_bus);
699 if (err)
700 goto err_out_free_mdio_irq;
701 err = tc_mii_probe(dev);
702 if (err)
703 goto err_out_unregister_bus;
704 return 0;
705
706 err_out_unregister_bus:
707 mdiobus_unregister(lp->mii_bus);
708 err_out_free_mdio_irq:
709 kfree(lp->mii_bus->irq);
710 err_out_free_mii_bus:
711 mdiobus_free(lp->mii_bus);
712 err_out:
713 return err;
714 }
715
716 #ifdef CONFIG_CPU_TX49XX
717 /*
718 * Find a platform_device providing a MAC address. The platform code
719 * should provide a "tc35815-mac" device with a MAC address in its
720 * platform_data.
721 */
722 static int __devinit tc35815_mac_match(struct device *dev, void *data)
723 {
724 struct platform_device *plat_dev = to_platform_device(dev);
725 struct pci_dev *pci_dev = data;
726 unsigned int id = pci_dev->irq;
727 return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
728 }
729
730 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
731 {
732 struct tc35815_local *lp = netdev_priv(dev);
733 struct device *pd = bus_find_device(&platform_bus_type, NULL,
734 lp->pci_dev, tc35815_mac_match);
735 if (pd) {
736 if (pd->platform_data)
737 memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
738 put_device(pd);
739 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
740 }
741 return -ENODEV;
742 }
743 #else
744 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
745 {
746 return -ENODEV;
747 }
748 #endif
749
750 static int __devinit tc35815_init_dev_addr(struct net_device *dev)
751 {
752 struct tc35815_regs __iomem *tr =
753 (struct tc35815_regs __iomem *)dev->base_addr;
754 int i;
755
756 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
757 ;
758 for (i = 0; i < 6; i += 2) {
759 unsigned short data;
760 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
761 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
762 ;
763 data = tc_readl(&tr->PROM_Data);
764 dev->dev_addr[i] = data & 0xff;
765 dev->dev_addr[i+1] = data >> 8;
766 }
767 if (!is_valid_ether_addr(dev->dev_addr))
768 return tc35815_read_plat_dev_addr(dev);
769 return 0;
770 }
771
772 static const struct net_device_ops tc35815_netdev_ops = {
773 .ndo_open = tc35815_open,
774 .ndo_stop = tc35815_close,
775 .ndo_start_xmit = tc35815_send_packet,
776 .ndo_get_stats = tc35815_get_stats,
777 .ndo_set_rx_mode = tc35815_set_multicast_list,
778 .ndo_tx_timeout = tc35815_tx_timeout,
779 .ndo_do_ioctl = tc35815_ioctl,
780 .ndo_validate_addr = eth_validate_addr,
781 .ndo_change_mtu = eth_change_mtu,
782 .ndo_set_mac_address = eth_mac_addr,
783 #ifdef CONFIG_NET_POLL_CONTROLLER
784 .ndo_poll_controller = tc35815_poll_controller,
785 #endif
786 };
787
788 static int __devinit tc35815_init_one(struct pci_dev *pdev,
789 const struct pci_device_id *ent)
790 {
791 void __iomem *ioaddr = NULL;
792 struct net_device *dev;
793 struct tc35815_local *lp;
794 int rc;
795
796 static int printed_version;
797 if (!printed_version++) {
798 printk(version);
799 dev_printk(KERN_DEBUG, &pdev->dev,
800 "speed:%d duplex:%d\n",
801 options.speed, options.duplex);
802 }
803
804 if (!pdev->irq) {
805 dev_warn(&pdev->dev, "no IRQ assigned.\n");
806 return -ENODEV;
807 }
808
809 /* dev zeroed in alloc_etherdev */
810 dev = alloc_etherdev(sizeof(*lp));
811 if (dev == NULL) {
812 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
813 return -ENOMEM;
814 }
815 SET_NETDEV_DEV(dev, &pdev->dev);
816 lp = netdev_priv(dev);
817 lp->dev = dev;
818
819 /* enable device (incl. PCI PM wakeup), and bus-mastering */
820 rc = pcim_enable_device(pdev);
821 if (rc)
822 goto err_out;
823 rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
824 if (rc)
825 goto err_out;
826 pci_set_master(pdev);
827 ioaddr = pcim_iomap_table(pdev)[1];
828
829 /* Initialize the device structure. */
830 dev->netdev_ops = &tc35815_netdev_ops;
831 dev->ethtool_ops = &tc35815_ethtool_ops;
832 dev->watchdog_timeo = TC35815_TX_TIMEOUT;
833 netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
834
835 dev->irq = pdev->irq;
836 dev->base_addr = (unsigned long)ioaddr;
837
838 INIT_WORK(&lp->restart_work, tc35815_restart_work);
839 spin_lock_init(&lp->lock);
840 spin_lock_init(&lp->rx_lock);
841 lp->pci_dev = pdev;
842 lp->chiptype = ent->driver_data;
843
844 lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
845 pci_set_drvdata(pdev, dev);
846
847 /* Soft reset the chip. */
848 tc35815_chip_reset(dev);
849
850 /* Retrieve the ethernet address. */
851 if (tc35815_init_dev_addr(dev)) {
852 dev_warn(&pdev->dev, "not valid ether addr\n");
853 random_ether_addr(dev->dev_addr);
854 }
855
856 rc = register_netdev(dev);
857 if (rc)
858 goto err_out;
859
860 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
861 printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
862 dev->name,
863 chip_info[ent->driver_data].name,
864 dev->base_addr,
865 dev->dev_addr,
866 dev->irq);
867
868 rc = tc_mii_init(dev);
869 if (rc)
870 goto err_out_unregister;
871
872 return 0;
873
874 err_out_unregister:
875 unregister_netdev(dev);
876 err_out:
877 free_netdev(dev);
878 return rc;
879 }
880
881
882 static void __devexit tc35815_remove_one(struct pci_dev *pdev)
883 {
884 struct net_device *dev = pci_get_drvdata(pdev);
885 struct tc35815_local *lp = netdev_priv(dev);
886
887 phy_disconnect(lp->phy_dev);
888 mdiobus_unregister(lp->mii_bus);
889 kfree(lp->mii_bus->irq);
890 mdiobus_free(lp->mii_bus);
891 unregister_netdev(dev);
892 free_netdev(dev);
893 pci_set_drvdata(pdev, NULL);
894 }
895
896 static int
897 tc35815_init_queues(struct net_device *dev)
898 {
899 struct tc35815_local *lp = netdev_priv(dev);
900 int i;
901 unsigned long fd_addr;
902
903 if (!lp->fd_buf) {
904 BUG_ON(sizeof(struct FDesc) +
905 sizeof(struct BDesc) * RX_BUF_NUM +
906 sizeof(struct FDesc) * RX_FD_NUM +
907 sizeof(struct TxFD) * TX_FD_NUM >
908 PAGE_SIZE * FD_PAGE_NUM);
909
910 lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
911 PAGE_SIZE * FD_PAGE_NUM,
912 &lp->fd_buf_dma);
913 if (!lp->fd_buf)
914 return -ENOMEM;
915 for (i = 0; i < RX_BUF_NUM; i++) {
916 lp->rx_skbs[i].skb =
917 alloc_rxbuf_skb(dev, lp->pci_dev,
918 &lp->rx_skbs[i].skb_dma);
919 if (!lp->rx_skbs[i].skb) {
920 while (--i >= 0) {
921 free_rxbuf_skb(lp->pci_dev,
922 lp->rx_skbs[i].skb,
923 lp->rx_skbs[i].skb_dma);
924 lp->rx_skbs[i].skb = NULL;
925 }
926 pci_free_consistent(lp->pci_dev,
927 PAGE_SIZE * FD_PAGE_NUM,
928 lp->fd_buf,
929 lp->fd_buf_dma);
930 lp->fd_buf = NULL;
931 return -ENOMEM;
932 }
933 }
934 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
935 dev->name, lp->fd_buf);
936 printk("\n");
937 } else {
938 for (i = 0; i < FD_PAGE_NUM; i++)
939 clear_page((void *)((unsigned long)lp->fd_buf +
940 i * PAGE_SIZE));
941 }
942 fd_addr = (unsigned long)lp->fd_buf;
943
944 /* Free Descriptors (for Receive) */
945 lp->rfd_base = (struct RxFD *)fd_addr;
946 fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
947 for (i = 0; i < RX_FD_NUM; i++)
948 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
949 lp->rfd_cur = lp->rfd_base;
950 lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
951
952 /* Transmit Descriptors */
953 lp->tfd_base = (struct TxFD *)fd_addr;
954 fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
955 for (i = 0; i < TX_FD_NUM; i++) {
956 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
957 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
958 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
959 }
960 lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
961 lp->tfd_start = 0;
962 lp->tfd_end = 0;
963
964 /* Buffer List (for Receive) */
965 lp->fbl_ptr = (struct FrFD *)fd_addr;
966 lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
967 lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
968 /*
969 * move all allocated skbs to head of rx_skbs[] array.
970 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
971 * tc35815_rx() had failed.
972 */
973 lp->fbl_count = 0;
974 for (i = 0; i < RX_BUF_NUM; i++) {
975 if (lp->rx_skbs[i].skb) {
976 if (i != lp->fbl_count) {
977 lp->rx_skbs[lp->fbl_count].skb =
978 lp->rx_skbs[i].skb;
979 lp->rx_skbs[lp->fbl_count].skb_dma =
980 lp->rx_skbs[i].skb_dma;
981 }
982 lp->fbl_count++;
983 }
984 }
985 for (i = 0; i < RX_BUF_NUM; i++) {
986 if (i >= lp->fbl_count) {
987 lp->fbl_ptr->bd[i].BuffData = 0;
988 lp->fbl_ptr->bd[i].BDCtl = 0;
989 continue;
990 }
991 lp->fbl_ptr->bd[i].BuffData =
992 cpu_to_le32(lp->rx_skbs[i].skb_dma);
993 /* BDID is index of FrFD.bd[] */
994 lp->fbl_ptr->bd[i].BDCtl =
995 cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
996 RX_BUF_SIZE);
997 }
998
999 printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
1000 dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
1001 return 0;
1002 }
1003
1004 static void
1005 tc35815_clear_queues(struct net_device *dev)
1006 {
1007 struct tc35815_local *lp = netdev_priv(dev);
1008 int i;
1009
1010 for (i = 0; i < TX_FD_NUM; i++) {
1011 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1012 struct sk_buff *skb =
1013 fdsystem != 0xffffffff ?
1014 lp->tx_skbs[fdsystem].skb : NULL;
1015 #ifdef DEBUG
1016 if (lp->tx_skbs[i].skb != skb) {
1017 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1018 panic_queues(dev);
1019 }
1020 #else
1021 BUG_ON(lp->tx_skbs[i].skb != skb);
1022 #endif
1023 if (skb) {
1024 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1025 lp->tx_skbs[i].skb = NULL;
1026 lp->tx_skbs[i].skb_dma = 0;
1027 dev_kfree_skb_any(skb);
1028 }
1029 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1030 }
1031
1032 tc35815_init_queues(dev);
1033 }
1034
1035 static void
1036 tc35815_free_queues(struct net_device *dev)
1037 {
1038 struct tc35815_local *lp = netdev_priv(dev);
1039 int i;
1040
1041 if (lp->tfd_base) {
1042 for (i = 0; i < TX_FD_NUM; i++) {
1043 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1044 struct sk_buff *skb =
1045 fdsystem != 0xffffffff ?
1046 lp->tx_skbs[fdsystem].skb : NULL;
1047 #ifdef DEBUG
1048 if (lp->tx_skbs[i].skb != skb) {
1049 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1050 panic_queues(dev);
1051 }
1052 #else
1053 BUG_ON(lp->tx_skbs[i].skb != skb);
1054 #endif
1055 if (skb) {
1056 dev_kfree_skb(skb);
1057 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1058 lp->tx_skbs[i].skb = NULL;
1059 lp->tx_skbs[i].skb_dma = 0;
1060 }
1061 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1062 }
1063 }
1064
1065 lp->rfd_base = NULL;
1066 lp->rfd_limit = NULL;
1067 lp->rfd_cur = NULL;
1068 lp->fbl_ptr = NULL;
1069
1070 for (i = 0; i < RX_BUF_NUM; i++) {
1071 if (lp->rx_skbs[i].skb) {
1072 free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1073 lp->rx_skbs[i].skb_dma);
1074 lp->rx_skbs[i].skb = NULL;
1075 }
1076 }
1077 if (lp->fd_buf) {
1078 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1079 lp->fd_buf, lp->fd_buf_dma);
1080 lp->fd_buf = NULL;
1081 }
1082 }
1083
1084 static void
1085 dump_txfd(struct TxFD *fd)
1086 {
1087 printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1088 le32_to_cpu(fd->fd.FDNext),
1089 le32_to_cpu(fd->fd.FDSystem),
1090 le32_to_cpu(fd->fd.FDStat),
1091 le32_to_cpu(fd->fd.FDCtl));
1092 printk("BD: ");
1093 printk(" %08x %08x",
1094 le32_to_cpu(fd->bd.BuffData),
1095 le32_to_cpu(fd->bd.BDCtl));
1096 printk("\n");
1097 }
1098
1099 static int
1100 dump_rxfd(struct RxFD *fd)
1101 {
1102 int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1103 if (bd_count > 8)
1104 bd_count = 8;
1105 printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1106 le32_to_cpu(fd->fd.FDNext),
1107 le32_to_cpu(fd->fd.FDSystem),
1108 le32_to_cpu(fd->fd.FDStat),
1109 le32_to_cpu(fd->fd.FDCtl));
1110 if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1111 return 0;
1112 printk("BD: ");
1113 for (i = 0; i < bd_count; i++)
1114 printk(" %08x %08x",
1115 le32_to_cpu(fd->bd[i].BuffData),
1116 le32_to_cpu(fd->bd[i].BDCtl));
1117 printk("\n");
1118 return bd_count;
1119 }
1120
1121 #ifdef DEBUG
1122 static void
1123 dump_frfd(struct FrFD *fd)
1124 {
1125 int i;
1126 printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1127 le32_to_cpu(fd->fd.FDNext),
1128 le32_to_cpu(fd->fd.FDSystem),
1129 le32_to_cpu(fd->fd.FDStat),
1130 le32_to_cpu(fd->fd.FDCtl));
1131 printk("BD: ");
1132 for (i = 0; i < RX_BUF_NUM; i++)
1133 printk(" %08x %08x",
1134 le32_to_cpu(fd->bd[i].BuffData),
1135 le32_to_cpu(fd->bd[i].BDCtl));
1136 printk("\n");
1137 }
1138
1139 static void
1140 panic_queues(struct net_device *dev)
1141 {
1142 struct tc35815_local *lp = netdev_priv(dev);
1143 int i;
1144
1145 printk("TxFD base %p, start %u, end %u\n",
1146 lp->tfd_base, lp->tfd_start, lp->tfd_end);
1147 printk("RxFD base %p limit %p cur %p\n",
1148 lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1149 printk("FrFD %p\n", lp->fbl_ptr);
1150 for (i = 0; i < TX_FD_NUM; i++)
1151 dump_txfd(&lp->tfd_base[i]);
1152 for (i = 0; i < RX_FD_NUM; i++) {
1153 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1154 i += (bd_count + 1) / 2; /* skip BDs */
1155 }
1156 dump_frfd(lp->fbl_ptr);
1157 panic("%s: Illegal queue state.", dev->name);
1158 }
1159 #endif
1160
1161 static void print_eth(const u8 *add)
1162 {
1163 printk(KERN_DEBUG "print_eth(%p)\n", add);
1164 printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1165 add + 6, add, add[12], add[13]);
1166 }
1167
1168 static int tc35815_tx_full(struct net_device *dev)
1169 {
1170 struct tc35815_local *lp = netdev_priv(dev);
1171 return (lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end;
1172 }
1173
1174 static void tc35815_restart(struct net_device *dev)
1175 {
1176 struct tc35815_local *lp = netdev_priv(dev);
1177
1178 if (lp->phy_dev) {
1179 int timeout;
1180
1181 phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
1182 timeout = 100;
1183 while (--timeout) {
1184 if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
1185 break;
1186 udelay(1);
1187 }
1188 if (!timeout)
1189 printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1190 }
1191
1192 spin_lock_bh(&lp->rx_lock);
1193 spin_lock_irq(&lp->lock);
1194 tc35815_chip_reset(dev);
1195 tc35815_clear_queues(dev);
1196 tc35815_chip_init(dev);
1197 /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1198 tc35815_set_multicast_list(dev);
1199 spin_unlock_irq(&lp->lock);
1200 spin_unlock_bh(&lp->rx_lock);
1201
1202 netif_wake_queue(dev);
1203 }
1204
1205 static void tc35815_restart_work(struct work_struct *work)
1206 {
1207 struct tc35815_local *lp =
1208 container_of(work, struct tc35815_local, restart_work);
1209 struct net_device *dev = lp->dev;
1210
1211 tc35815_restart(dev);
1212 }
1213
1214 static void tc35815_schedule_restart(struct net_device *dev)
1215 {
1216 struct tc35815_local *lp = netdev_priv(dev);
1217 struct tc35815_regs __iomem *tr =
1218 (struct tc35815_regs __iomem *)dev->base_addr;
1219 unsigned long flags;
1220
1221 /* disable interrupts */
1222 spin_lock_irqsave(&lp->lock, flags);
1223 tc_writel(0, &tr->Int_En);
1224 tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1225 schedule_work(&lp->restart_work);
1226 spin_unlock_irqrestore(&lp->lock, flags);
1227 }
1228
1229 static void tc35815_tx_timeout(struct net_device *dev)
1230 {
1231 struct tc35815_regs __iomem *tr =
1232 (struct tc35815_regs __iomem *)dev->base_addr;
1233
1234 printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1235 dev->name, tc_readl(&tr->Tx_Stat));
1236
1237 /* Try to restart the adaptor. */
1238 tc35815_schedule_restart(dev);
1239 dev->stats.tx_errors++;
1240 }
1241
1242 /*
1243 * Open/initialize the controller. This is called (in the current kernel)
1244 * sometime after booting when the 'ifconfig' program is run.
1245 *
1246 * This routine should set everything up anew at each open, even
1247 * registers that "should" only need to be set once at boot, so that
1248 * there is non-reboot way to recover if something goes wrong.
1249 */
1250 static int
1251 tc35815_open(struct net_device *dev)
1252 {
1253 struct tc35815_local *lp = netdev_priv(dev);
1254
1255 /*
1256 * This is used if the interrupt line can turned off (shared).
1257 * See 3c503.c for an example of selecting the IRQ at config-time.
1258 */
1259 if (request_irq(dev->irq, tc35815_interrupt, IRQF_SHARED,
1260 dev->name, dev))
1261 return -EAGAIN;
1262
1263 tc35815_chip_reset(dev);
1264
1265 if (tc35815_init_queues(dev) != 0) {
1266 free_irq(dev->irq, dev);
1267 return -EAGAIN;
1268 }
1269
1270 napi_enable(&lp->napi);
1271
1272 /* Reset the hardware here. Don't forget to set the station address. */
1273 spin_lock_irq(&lp->lock);
1274 tc35815_chip_init(dev);
1275 spin_unlock_irq(&lp->lock);
1276
1277 netif_carrier_off(dev);
1278 /* schedule a link state check */
1279 phy_start(lp->phy_dev);
1280
1281 /* We are now ready to accept transmit requeusts from
1282 * the queueing layer of the networking.
1283 */
1284 netif_start_queue(dev);
1285
1286 return 0;
1287 }
1288
1289 /* This will only be invoked if your driver is _not_ in XOFF state.
1290 * What this means is that you need not check it, and that this
1291 * invariant will hold if you make sure that the netif_*_queue()
1292 * calls are done at the proper times.
1293 */
1294 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1295 {
1296 struct tc35815_local *lp = netdev_priv(dev);
1297 struct TxFD *txfd;
1298 unsigned long flags;
1299
1300 /* If some error occurs while trying to transmit this
1301 * packet, you should return '1' from this function.
1302 * In such a case you _may not_ do anything to the
1303 * SKB, it is still owned by the network queueing
1304 * layer when an error is returned. This means you
1305 * may not modify any SKB fields, you may not free
1306 * the SKB, etc.
1307 */
1308
1309 /* This is the most common case for modern hardware.
1310 * The spinlock protects this code from the TX complete
1311 * hardware interrupt handler. Queue flow control is
1312 * thus managed under this lock as well.
1313 */
1314 spin_lock_irqsave(&lp->lock, flags);
1315
1316 /* failsafe... (handle txdone now if half of FDs are used) */
1317 if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1318 TX_FD_NUM / 2)
1319 tc35815_txdone(dev);
1320
1321 if (netif_msg_pktdata(lp))
1322 print_eth(skb->data);
1323 #ifdef DEBUG
1324 if (lp->tx_skbs[lp->tfd_start].skb) {
1325 printk("%s: tx_skbs conflict.\n", dev->name);
1326 panic_queues(dev);
1327 }
1328 #else
1329 BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1330 #endif
1331 lp->tx_skbs[lp->tfd_start].skb = skb;
1332 lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1333
1334 /*add to ring */
1335 txfd = &lp->tfd_base[lp->tfd_start];
1336 txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1337 txfd->bd.BDCtl = cpu_to_le32(skb->len);
1338 txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1339 txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1340
1341 if (lp->tfd_start == lp->tfd_end) {
1342 struct tc35815_regs __iomem *tr =
1343 (struct tc35815_regs __iomem *)dev->base_addr;
1344 /* Start DMA Transmitter. */
1345 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1346 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1347 if (netif_msg_tx_queued(lp)) {
1348 printk("%s: starting TxFD.\n", dev->name);
1349 dump_txfd(txfd);
1350 }
1351 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1352 } else {
1353 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1354 if (netif_msg_tx_queued(lp)) {
1355 printk("%s: queueing TxFD.\n", dev->name);
1356 dump_txfd(txfd);
1357 }
1358 }
1359 lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1360
1361 /* If we just used up the very last entry in the
1362 * TX ring on this device, tell the queueing
1363 * layer to send no more.
1364 */
1365 if (tc35815_tx_full(dev)) {
1366 if (netif_msg_tx_queued(lp))
1367 printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1368 netif_stop_queue(dev);
1369 }
1370
1371 /* When the TX completion hw interrupt arrives, this
1372 * is when the transmit statistics are updated.
1373 */
1374
1375 spin_unlock_irqrestore(&lp->lock, flags);
1376 return NETDEV_TX_OK;
1377 }
1378
1379 #define FATAL_ERROR_INT \
1380 (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1381 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1382 {
1383 static int count;
1384 printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1385 dev->name, status);
1386 if (status & Int_IntPCI)
1387 printk(" IntPCI");
1388 if (status & Int_DmParErr)
1389 printk(" DmParErr");
1390 if (status & Int_IntNRAbt)
1391 printk(" IntNRAbt");
1392 printk("\n");
1393 if (count++ > 100)
1394 panic("%s: Too many fatal errors.", dev->name);
1395 printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1396 /* Try to restart the adaptor. */
1397 tc35815_schedule_restart(dev);
1398 }
1399
1400 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1401 {
1402 struct tc35815_local *lp = netdev_priv(dev);
1403 int ret = -1;
1404
1405 /* Fatal errors... */
1406 if (status & FATAL_ERROR_INT) {
1407 tc35815_fatal_error_interrupt(dev, status);
1408 return 0;
1409 }
1410 /* recoverable errors */
1411 if (status & Int_IntFDAEx) {
1412 if (netif_msg_rx_err(lp))
1413 dev_warn(&dev->dev,
1414 "Free Descriptor Area Exhausted (%#x).\n",
1415 status);
1416 dev->stats.rx_dropped++;
1417 ret = 0;
1418 }
1419 if (status & Int_IntBLEx) {
1420 if (netif_msg_rx_err(lp))
1421 dev_warn(&dev->dev,
1422 "Buffer List Exhausted (%#x).\n",
1423 status);
1424 dev->stats.rx_dropped++;
1425 ret = 0;
1426 }
1427 if (status & Int_IntExBD) {
1428 if (netif_msg_rx_err(lp))
1429 dev_warn(&dev->dev,
1430 "Excessive Buffer Descriptiors (%#x).\n",
1431 status);
1432 dev->stats.rx_length_errors++;
1433 ret = 0;
1434 }
1435
1436 /* normal notification */
1437 if (status & Int_IntMacRx) {
1438 /* Got a packet(s). */
1439 ret = tc35815_rx(dev, limit);
1440 lp->lstats.rx_ints++;
1441 }
1442 if (status & Int_IntMacTx) {
1443 /* Transmit complete. */
1444 lp->lstats.tx_ints++;
1445 spin_lock_irq(&lp->lock);
1446 tc35815_txdone(dev);
1447 spin_unlock_irq(&lp->lock);
1448 if (ret < 0)
1449 ret = 0;
1450 }
1451 return ret;
1452 }
1453
1454 /*
1455 * The typical workload of the driver:
1456 * Handle the network interface interrupts.
1457 */
1458 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1459 {
1460 struct net_device *dev = dev_id;
1461 struct tc35815_local *lp = netdev_priv(dev);
1462 struct tc35815_regs __iomem *tr =
1463 (struct tc35815_regs __iomem *)dev->base_addr;
1464 u32 dmactl = tc_readl(&tr->DMA_Ctl);
1465
1466 if (!(dmactl & DMA_IntMask)) {
1467 /* disable interrupts */
1468 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1469 if (napi_schedule_prep(&lp->napi))
1470 __napi_schedule(&lp->napi);
1471 else {
1472 printk(KERN_ERR "%s: interrupt taken in poll\n",
1473 dev->name);
1474 BUG();
1475 }
1476 (void)tc_readl(&tr->Int_Src); /* flush */
1477 return IRQ_HANDLED;
1478 }
1479 return IRQ_NONE;
1480 }
1481
1482 #ifdef CONFIG_NET_POLL_CONTROLLER
1483 static void tc35815_poll_controller(struct net_device *dev)
1484 {
1485 disable_irq(dev->irq);
1486 tc35815_interrupt(dev->irq, dev);
1487 enable_irq(dev->irq);
1488 }
1489 #endif
1490
1491 /* We have a good packet(s), get it/them out of the buffers. */
1492 static int
1493 tc35815_rx(struct net_device *dev, int limit)
1494 {
1495 struct tc35815_local *lp = netdev_priv(dev);
1496 unsigned int fdctl;
1497 int i;
1498 int received = 0;
1499
1500 while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1501 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1502 int pkt_len = fdctl & FD_FDLength_MASK;
1503 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1504 #ifdef DEBUG
1505 struct RxFD *next_rfd;
1506 #endif
1507 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1508 pkt_len -= ETH_FCS_LEN;
1509 #endif
1510
1511 if (netif_msg_rx_status(lp))
1512 dump_rxfd(lp->rfd_cur);
1513 if (status & Rx_Good) {
1514 struct sk_buff *skb;
1515 unsigned char *data;
1516 int cur_bd;
1517
1518 if (--limit < 0)
1519 break;
1520 BUG_ON(bd_count > 1);
1521 cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1522 & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1523 #ifdef DEBUG
1524 if (cur_bd >= RX_BUF_NUM) {
1525 printk("%s: invalid BDID.\n", dev->name);
1526 panic_queues(dev);
1527 }
1528 BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1529 (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1530 if (!lp->rx_skbs[cur_bd].skb) {
1531 printk("%s: NULL skb.\n", dev->name);
1532 panic_queues(dev);
1533 }
1534 #else
1535 BUG_ON(cur_bd >= RX_BUF_NUM);
1536 #endif
1537 skb = lp->rx_skbs[cur_bd].skb;
1538 prefetch(skb->data);
1539 lp->rx_skbs[cur_bd].skb = NULL;
1540 pci_unmap_single(lp->pci_dev,
1541 lp->rx_skbs[cur_bd].skb_dma,
1542 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1543 if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
1544 memmove(skb->data, skb->data - NET_IP_ALIGN,
1545 pkt_len);
1546 data = skb_put(skb, pkt_len);
1547 if (netif_msg_pktdata(lp))
1548 print_eth(data);
1549 skb->protocol = eth_type_trans(skb, dev);
1550 netif_receive_skb(skb);
1551 received++;
1552 dev->stats.rx_packets++;
1553 dev->stats.rx_bytes += pkt_len;
1554 } else {
1555 dev->stats.rx_errors++;
1556 if (netif_msg_rx_err(lp))
1557 dev_info(&dev->dev, "Rx error (status %x)\n",
1558 status & Rx_Stat_Mask);
1559 /* WORKAROUND: LongErr and CRCErr means Overflow. */
1560 if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1561 status &= ~(Rx_LongErr|Rx_CRCErr);
1562 status |= Rx_Over;
1563 }
1564 if (status & Rx_LongErr)
1565 dev->stats.rx_length_errors++;
1566 if (status & Rx_Over)
1567 dev->stats.rx_fifo_errors++;
1568 if (status & Rx_CRCErr)
1569 dev->stats.rx_crc_errors++;
1570 if (status & Rx_Align)
1571 dev->stats.rx_frame_errors++;
1572 }
1573
1574 if (bd_count > 0) {
1575 /* put Free Buffer back to controller */
1576 int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1577 unsigned char id =
1578 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1579 #ifdef DEBUG
1580 if (id >= RX_BUF_NUM) {
1581 printk("%s: invalid BDID.\n", dev->name);
1582 panic_queues(dev);
1583 }
1584 #else
1585 BUG_ON(id >= RX_BUF_NUM);
1586 #endif
1587 /* free old buffers */
1588 lp->fbl_count--;
1589 while (lp->fbl_count < RX_BUF_NUM)
1590 {
1591 unsigned char curid =
1592 (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1593 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1594 #ifdef DEBUG
1595 bdctl = le32_to_cpu(bd->BDCtl);
1596 if (bdctl & BD_CownsBD) {
1597 printk("%s: Freeing invalid BD.\n",
1598 dev->name);
1599 panic_queues(dev);
1600 }
1601 #endif
1602 /* pass BD to controller */
1603 if (!lp->rx_skbs[curid].skb) {
1604 lp->rx_skbs[curid].skb =
1605 alloc_rxbuf_skb(dev,
1606 lp->pci_dev,
1607 &lp->rx_skbs[curid].skb_dma);
1608 if (!lp->rx_skbs[curid].skb)
1609 break; /* try on next reception */
1610 bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1611 }
1612 /* Note: BDLength was modified by chip. */
1613 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1614 (curid << BD_RxBDID_SHIFT) |
1615 RX_BUF_SIZE);
1616 lp->fbl_count++;
1617 }
1618 }
1619
1620 /* put RxFD back to controller */
1621 #ifdef DEBUG
1622 next_rfd = fd_bus_to_virt(lp,
1623 le32_to_cpu(lp->rfd_cur->fd.FDNext));
1624 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1625 printk("%s: RxFD FDNext invalid.\n", dev->name);
1626 panic_queues(dev);
1627 }
1628 #endif
1629 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1630 /* pass FD to controller */
1631 #ifdef DEBUG
1632 lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1633 #else
1634 lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1635 #endif
1636 lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1637 lp->rfd_cur++;
1638 }
1639 if (lp->rfd_cur > lp->rfd_limit)
1640 lp->rfd_cur = lp->rfd_base;
1641 #ifdef DEBUG
1642 if (lp->rfd_cur != next_rfd)
1643 printk("rfd_cur = %p, next_rfd %p\n",
1644 lp->rfd_cur, next_rfd);
1645 #endif
1646 }
1647
1648 return received;
1649 }
1650
1651 static int tc35815_poll(struct napi_struct *napi, int budget)
1652 {
1653 struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1654 struct net_device *dev = lp->dev;
1655 struct tc35815_regs __iomem *tr =
1656 (struct tc35815_regs __iomem *)dev->base_addr;
1657 int received = 0, handled;
1658 u32 status;
1659
1660 spin_lock(&lp->rx_lock);
1661 status = tc_readl(&tr->Int_Src);
1662 do {
1663 /* BLEx, FDAEx will be cleared later */
1664 tc_writel(status & ~(Int_BLEx | Int_FDAEx),
1665 &tr->Int_Src); /* write to clear */
1666
1667 handled = tc35815_do_interrupt(dev, status, budget - received);
1668 if (status & (Int_BLEx | Int_FDAEx))
1669 tc_writel(status & (Int_BLEx | Int_FDAEx),
1670 &tr->Int_Src);
1671 if (handled >= 0) {
1672 received += handled;
1673 if (received >= budget)
1674 break;
1675 }
1676 status = tc_readl(&tr->Int_Src);
1677 } while (status);
1678 spin_unlock(&lp->rx_lock);
1679
1680 if (received < budget) {
1681 napi_complete(napi);
1682 /* enable interrupts */
1683 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1684 }
1685 return received;
1686 }
1687
1688 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1689
1690 static void
1691 tc35815_check_tx_stat(struct net_device *dev, int status)
1692 {
1693 struct tc35815_local *lp = netdev_priv(dev);
1694 const char *msg = NULL;
1695
1696 /* count collisions */
1697 if (status & Tx_ExColl)
1698 dev->stats.collisions += 16;
1699 if (status & Tx_TxColl_MASK)
1700 dev->stats.collisions += status & Tx_TxColl_MASK;
1701
1702 /* TX4939 does not have NCarr */
1703 if (lp->chiptype == TC35815_TX4939)
1704 status &= ~Tx_NCarr;
1705 /* WORKAROUND: ignore LostCrS in full duplex operation */
1706 if (!lp->link || lp->duplex == DUPLEX_FULL)
1707 status &= ~Tx_NCarr;
1708
1709 if (!(status & TX_STA_ERR)) {
1710 /* no error. */
1711 dev->stats.tx_packets++;
1712 return;
1713 }
1714
1715 dev->stats.tx_errors++;
1716 if (status & Tx_ExColl) {
1717 dev->stats.tx_aborted_errors++;
1718 msg = "Excessive Collision.";
1719 }
1720 if (status & Tx_Under) {
1721 dev->stats.tx_fifo_errors++;
1722 msg = "Tx FIFO Underrun.";
1723 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1724 lp->lstats.tx_underrun++;
1725 if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1726 struct tc35815_regs __iomem *tr =
1727 (struct tc35815_regs __iomem *)dev->base_addr;
1728 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1729 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1730 }
1731 }
1732 }
1733 if (status & Tx_Defer) {
1734 dev->stats.tx_fifo_errors++;
1735 msg = "Excessive Deferral.";
1736 }
1737 if (status & Tx_NCarr) {
1738 dev->stats.tx_carrier_errors++;
1739 msg = "Lost Carrier Sense.";
1740 }
1741 if (status & Tx_LateColl) {
1742 dev->stats.tx_aborted_errors++;
1743 msg = "Late Collision.";
1744 }
1745 if (status & Tx_TxPar) {
1746 dev->stats.tx_fifo_errors++;
1747 msg = "Transmit Parity Error.";
1748 }
1749 if (status & Tx_SQErr) {
1750 dev->stats.tx_heartbeat_errors++;
1751 msg = "Signal Quality Error.";
1752 }
1753 if (msg && netif_msg_tx_err(lp))
1754 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1755 }
1756
1757 /* This handles TX complete events posted by the device
1758 * via interrupts.
1759 */
1760 static void
1761 tc35815_txdone(struct net_device *dev)
1762 {
1763 struct tc35815_local *lp = netdev_priv(dev);
1764 struct TxFD *txfd;
1765 unsigned int fdctl;
1766
1767 txfd = &lp->tfd_base[lp->tfd_end];
1768 while (lp->tfd_start != lp->tfd_end &&
1769 !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1770 int status = le32_to_cpu(txfd->fd.FDStat);
1771 struct sk_buff *skb;
1772 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1773 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1774
1775 if (netif_msg_tx_done(lp)) {
1776 printk("%s: complete TxFD.\n", dev->name);
1777 dump_txfd(txfd);
1778 }
1779 tc35815_check_tx_stat(dev, status);
1780
1781 skb = fdsystem != 0xffffffff ?
1782 lp->tx_skbs[fdsystem].skb : NULL;
1783 #ifdef DEBUG
1784 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1785 printk("%s: tx_skbs mismatch.\n", dev->name);
1786 panic_queues(dev);
1787 }
1788 #else
1789 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1790 #endif
1791 if (skb) {
1792 dev->stats.tx_bytes += skb->len;
1793 pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1794 lp->tx_skbs[lp->tfd_end].skb = NULL;
1795 lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1796 dev_kfree_skb_any(skb);
1797 }
1798 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1799
1800 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1801 txfd = &lp->tfd_base[lp->tfd_end];
1802 #ifdef DEBUG
1803 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1804 printk("%s: TxFD FDNext invalid.\n", dev->name);
1805 panic_queues(dev);
1806 }
1807 #endif
1808 if (fdnext & FD_Next_EOL) {
1809 /* DMA Transmitter has been stopping... */
1810 if (lp->tfd_end != lp->tfd_start) {
1811 struct tc35815_regs __iomem *tr =
1812 (struct tc35815_regs __iomem *)dev->base_addr;
1813 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1814 struct TxFD *txhead = &lp->tfd_base[head];
1815 int qlen = (lp->tfd_start + TX_FD_NUM
1816 - lp->tfd_end) % TX_FD_NUM;
1817
1818 #ifdef DEBUG
1819 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1820 printk("%s: TxFD FDCtl invalid.\n", dev->name);
1821 panic_queues(dev);
1822 }
1823 #endif
1824 /* log max queue length */
1825 if (lp->lstats.max_tx_qlen < qlen)
1826 lp->lstats.max_tx_qlen = qlen;
1827
1828
1829 /* start DMA Transmitter again */
1830 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1831 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1832 if (netif_msg_tx_queued(lp)) {
1833 printk("%s: start TxFD on queue.\n",
1834 dev->name);
1835 dump_txfd(txfd);
1836 }
1837 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1838 }
1839 break;
1840 }
1841 }
1842
1843 /* If we had stopped the queue due to a "tx full"
1844 * condition, and space has now been made available,
1845 * wake up the queue.
1846 */
1847 if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
1848 netif_wake_queue(dev);
1849 }
1850
1851 /* The inverse routine to tc35815_open(). */
1852 static int
1853 tc35815_close(struct net_device *dev)
1854 {
1855 struct tc35815_local *lp = netdev_priv(dev);
1856
1857 netif_stop_queue(dev);
1858 napi_disable(&lp->napi);
1859 if (lp->phy_dev)
1860 phy_stop(lp->phy_dev);
1861 cancel_work_sync(&lp->restart_work);
1862
1863 /* Flush the Tx and disable Rx here. */
1864 tc35815_chip_reset(dev);
1865 free_irq(dev->irq, dev);
1866
1867 tc35815_free_queues(dev);
1868
1869 return 0;
1870
1871 }
1872
1873 /*
1874 * Get the current statistics.
1875 * This may be called with the card open or closed.
1876 */
1877 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1878 {
1879 struct tc35815_regs __iomem *tr =
1880 (struct tc35815_regs __iomem *)dev->base_addr;
1881 if (netif_running(dev))
1882 /* Update the statistics from the device registers. */
1883 dev->stats.rx_missed_errors += tc_readl(&tr->Miss_Cnt);
1884
1885 return &dev->stats;
1886 }
1887
1888 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1889 {
1890 struct tc35815_local *lp = netdev_priv(dev);
1891 struct tc35815_regs __iomem *tr =
1892 (struct tc35815_regs __iomem *)dev->base_addr;
1893 int cam_index = index * 6;
1894 u32 cam_data;
1895 u32 saved_addr;
1896
1897 saved_addr = tc_readl(&tr->CAM_Adr);
1898
1899 if (netif_msg_hw(lp))
1900 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
1901 dev->name, index, addr);
1902 if (index & 1) {
1903 /* read modify write */
1904 tc_writel(cam_index - 2, &tr->CAM_Adr);
1905 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1906 cam_data |= addr[0] << 8 | addr[1];
1907 tc_writel(cam_data, &tr->CAM_Data);
1908 /* write whole word */
1909 tc_writel(cam_index + 2, &tr->CAM_Adr);
1910 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1911 tc_writel(cam_data, &tr->CAM_Data);
1912 } else {
1913 /* write whole word */
1914 tc_writel(cam_index, &tr->CAM_Adr);
1915 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1916 tc_writel(cam_data, &tr->CAM_Data);
1917 /* read modify write */
1918 tc_writel(cam_index + 4, &tr->CAM_Adr);
1919 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1920 cam_data |= addr[4] << 24 | (addr[5] << 16);
1921 tc_writel(cam_data, &tr->CAM_Data);
1922 }
1923
1924 tc_writel(saved_addr, &tr->CAM_Adr);
1925 }
1926
1927
1928 /*
1929 * Set or clear the multicast filter for this adaptor.
1930 * num_addrs == -1 Promiscuous mode, receive all packets
1931 * num_addrs == 0 Normal mode, clear multicast list
1932 * num_addrs > 0 Multicast mode, receive normal and MC packets,
1933 * and do best-effort filtering.
1934 */
1935 static void
1936 tc35815_set_multicast_list(struct net_device *dev)
1937 {
1938 struct tc35815_regs __iomem *tr =
1939 (struct tc35815_regs __iomem *)dev->base_addr;
1940
1941 if (dev->flags & IFF_PROMISC) {
1942 /* With some (all?) 100MHalf HUB, controller will hang
1943 * if we enabled promiscuous mode before linkup... */
1944 struct tc35815_local *lp = netdev_priv(dev);
1945
1946 if (!lp->link)
1947 return;
1948 /* Enable promiscuous mode */
1949 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
1950 } else if ((dev->flags & IFF_ALLMULTI) ||
1951 netdev_mc_count(dev) > CAM_ENTRY_MAX - 3) {
1952 /* CAM 0, 1, 20 are reserved. */
1953 /* Disable promiscuous mode, use normal mode. */
1954 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
1955 } else if (!netdev_mc_empty(dev)) {
1956 struct netdev_hw_addr *ha;
1957 int i;
1958 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
1959
1960 tc_writel(0, &tr->CAM_Ctl);
1961 /* Walk the address list, and load the filter */
1962 i = 0;
1963 netdev_for_each_mc_addr(ha, dev) {
1964 /* entry 0,1 is reserved. */
1965 tc35815_set_cam_entry(dev, i + 2, ha->addr);
1966 ena_bits |= CAM_Ena_Bit(i + 2);
1967 i++;
1968 }
1969 tc_writel(ena_bits, &tr->CAM_Ena);
1970 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1971 } else {
1972 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
1973 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1974 }
1975 }
1976
1977 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1978 {
1979 struct tc35815_local *lp = netdev_priv(dev);
1980 strcpy(info->driver, MODNAME);
1981 strcpy(info->version, DRV_VERSION);
1982 strcpy(info->bus_info, pci_name(lp->pci_dev));
1983 }
1984
1985 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1986 {
1987 struct tc35815_local *lp = netdev_priv(dev);
1988
1989 if (!lp->phy_dev)
1990 return -ENODEV;
1991 return phy_ethtool_gset(lp->phy_dev, cmd);
1992 }
1993
1994 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1995 {
1996 struct tc35815_local *lp = netdev_priv(dev);
1997
1998 if (!lp->phy_dev)
1999 return -ENODEV;
2000 return phy_ethtool_sset(lp->phy_dev, cmd);
2001 }
2002
2003 static u32 tc35815_get_msglevel(struct net_device *dev)
2004 {
2005 struct tc35815_local *lp = netdev_priv(dev);
2006 return lp->msg_enable;
2007 }
2008
2009 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2010 {
2011 struct tc35815_local *lp = netdev_priv(dev);
2012 lp->msg_enable = datum;
2013 }
2014
2015 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2016 {
2017 struct tc35815_local *lp = netdev_priv(dev);
2018
2019 switch (sset) {
2020 case ETH_SS_STATS:
2021 return sizeof(lp->lstats) / sizeof(int);
2022 default:
2023 return -EOPNOTSUPP;
2024 }
2025 }
2026
2027 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2028 {
2029 struct tc35815_local *lp = netdev_priv(dev);
2030 data[0] = lp->lstats.max_tx_qlen;
2031 data[1] = lp->lstats.tx_ints;
2032 data[2] = lp->lstats.rx_ints;
2033 data[3] = lp->lstats.tx_underrun;
2034 }
2035
2036 static struct {
2037 const char str[ETH_GSTRING_LEN];
2038 } ethtool_stats_keys[] = {
2039 { "max_tx_qlen" },
2040 { "tx_ints" },
2041 { "rx_ints" },
2042 { "tx_underrun" },
2043 };
2044
2045 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2046 {
2047 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2048 }
2049
2050 static const struct ethtool_ops tc35815_ethtool_ops = {
2051 .get_drvinfo = tc35815_get_drvinfo,
2052 .get_settings = tc35815_get_settings,
2053 .set_settings = tc35815_set_settings,
2054 .get_link = ethtool_op_get_link,
2055 .get_msglevel = tc35815_get_msglevel,
2056 .set_msglevel = tc35815_set_msglevel,
2057 .get_strings = tc35815_get_strings,
2058 .get_sset_count = tc35815_get_sset_count,
2059 .get_ethtool_stats = tc35815_get_ethtool_stats,
2060 };
2061
2062 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2063 {
2064 struct tc35815_local *lp = netdev_priv(dev);
2065
2066 if (!netif_running(dev))
2067 return -EINVAL;
2068 if (!lp->phy_dev)
2069 return -ENODEV;
2070 return phy_mii_ioctl(lp->phy_dev, rq, cmd);
2071 }
2072
2073 static void tc35815_chip_reset(struct net_device *dev)
2074 {
2075 struct tc35815_regs __iomem *tr =
2076 (struct tc35815_regs __iomem *)dev->base_addr;
2077 int i;
2078 /* reset the controller */
2079 tc_writel(MAC_Reset, &tr->MAC_Ctl);
2080 udelay(4); /* 3200ns */
2081 i = 0;
2082 while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2083 if (i++ > 100) {
2084 printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2085 break;
2086 }
2087 mdelay(1);
2088 }
2089 tc_writel(0, &tr->MAC_Ctl);
2090
2091 /* initialize registers to default value */
2092 tc_writel(0, &tr->DMA_Ctl);
2093 tc_writel(0, &tr->TxThrsh);
2094 tc_writel(0, &tr->TxPollCtr);
2095 tc_writel(0, &tr->RxFragSize);
2096 tc_writel(0, &tr->Int_En);
2097 tc_writel(0, &tr->FDA_Bas);
2098 tc_writel(0, &tr->FDA_Lim);
2099 tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
2100 tc_writel(0, &tr->CAM_Ctl);
2101 tc_writel(0, &tr->Tx_Ctl);
2102 tc_writel(0, &tr->Rx_Ctl);
2103 tc_writel(0, &tr->CAM_Ena);
2104 (void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
2105
2106 /* initialize internal SRAM */
2107 tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2108 for (i = 0; i < 0x1000; i += 4) {
2109 tc_writel(i, &tr->CAM_Adr);
2110 tc_writel(0, &tr->CAM_Data);
2111 }
2112 tc_writel(0, &tr->DMA_Ctl);
2113 }
2114
2115 static void tc35815_chip_init(struct net_device *dev)
2116 {
2117 struct tc35815_local *lp = netdev_priv(dev);
2118 struct tc35815_regs __iomem *tr =
2119 (struct tc35815_regs __iomem *)dev->base_addr;
2120 unsigned long txctl = TX_CTL_CMD;
2121
2122 /* load station address to CAM */
2123 tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2124
2125 /* Enable CAM (broadcast and unicast) */
2126 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2127 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2128
2129 /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2130 if (HAVE_DMA_RXALIGN(lp))
2131 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2132 else
2133 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2134 tc_writel(0, &tr->TxPollCtr); /* Batch mode */
2135 tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2136 tc_writel(INT_EN_CMD, &tr->Int_En);
2137
2138 /* set queues */
2139 tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2140 tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2141 &tr->FDA_Lim);
2142 /*
2143 * Activation method:
2144 * First, enable the MAC Transmitter and the DMA Receive circuits.
2145 * Then enable the DMA Transmitter and the MAC Receive circuits.
2146 */
2147 tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
2148 tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
2149
2150 /* start MAC transmitter */
2151 /* TX4939 does not have EnLCarr */
2152 if (lp->chiptype == TC35815_TX4939)
2153 txctl &= ~Tx_EnLCarr;
2154 /* WORKAROUND: ignore LostCrS in full duplex operation */
2155 if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
2156 txctl &= ~Tx_EnLCarr;
2157 tc_writel(txctl, &tr->Tx_Ctl);
2158 }
2159
2160 #ifdef CONFIG_PM
2161 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2162 {
2163 struct net_device *dev = pci_get_drvdata(pdev);
2164 struct tc35815_local *lp = netdev_priv(dev);
2165 unsigned long flags;
2166
2167 pci_save_state(pdev);
2168 if (!netif_running(dev))
2169 return 0;
2170 netif_device_detach(dev);
2171 if (lp->phy_dev)
2172 phy_stop(lp->phy_dev);
2173 spin_lock_irqsave(&lp->lock, flags);
2174 tc35815_chip_reset(dev);
2175 spin_unlock_irqrestore(&lp->lock, flags);
2176 pci_set_power_state(pdev, PCI_D3hot);
2177 return 0;
2178 }
2179
2180 static int tc35815_resume(struct pci_dev *pdev)
2181 {
2182 struct net_device *dev = pci_get_drvdata(pdev);
2183 struct tc35815_local *lp = netdev_priv(dev);
2184
2185 pci_restore_state(pdev);
2186 if (!netif_running(dev))
2187 return 0;
2188 pci_set_power_state(pdev, PCI_D0);
2189 tc35815_restart(dev);
2190 netif_carrier_off(dev);
2191 if (lp->phy_dev)
2192 phy_start(lp->phy_dev);
2193 netif_device_attach(dev);
2194 return 0;
2195 }
2196 #endif /* CONFIG_PM */
2197
2198 static struct pci_driver tc35815_pci_driver = {
2199 .name = MODNAME,
2200 .id_table = tc35815_pci_tbl,
2201 .probe = tc35815_init_one,
2202 .remove = __devexit_p(tc35815_remove_one),
2203 #ifdef CONFIG_PM
2204 .suspend = tc35815_suspend,
2205 .resume = tc35815_resume,
2206 #endif
2207 };
2208
2209 module_param_named(speed, options.speed, int, 0);
2210 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2211 module_param_named(duplex, options.duplex, int, 0);
2212 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2213
2214 static int __init tc35815_init_module(void)
2215 {
2216 return pci_register_driver(&tc35815_pci_driver);
2217 }
2218
2219 static void __exit tc35815_cleanup_module(void)
2220 {
2221 pci_unregister_driver(&tc35815_pci_driver);
2222 }
2223
2224 module_init(tc35815_init_module);
2225 module_exit(tc35815_cleanup_module);
2226
2227 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2228 MODULE_LICENSE("GPL");