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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / tc35815.c
blob7ca51cebcddd832b7e4f7c69ab4589da50fdfc03
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 <asm/io.h>
51 #include <asm/byteorder.h>
52
53 enum tc35815_chiptype {
54 TC35815CF = 0,
55 TC35815_NWU,
56 TC35815_TX4939,
57 };
58
59 /* indexed by tc35815_chiptype, above */
60 static const struct {
61 const char *name;
62 } chip_info[] __devinitdata = {
63 { "TOSHIBA TC35815CF 10/100BaseTX" },
64 { "TOSHIBA TC35815 with Wake on LAN" },
65 { "TOSHIBA TC35815/TX4939" },
66 };
67
68 static DEFINE_PCI_DEVICE_TABLE(tc35815_pci_tbl) = {
69 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815CF), .driver_data = TC35815CF },
70 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_NWU), .driver_data = TC35815_NWU },
71 {PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939), .driver_data = TC35815_TX4939 },
72 {0,}
73 };
74 MODULE_DEVICE_TABLE(pci, tc35815_pci_tbl);
75
76 /* see MODULE_PARM_DESC */
77 static struct tc35815_options {
78 int speed;
79 int duplex;
80 } options;
81
82 /*
83 * Registers
84 */
85 struct tc35815_regs {
86 __u32 DMA_Ctl; /* 0x00 */
87 __u32 TxFrmPtr;
88 __u32 TxThrsh;
89 __u32 TxPollCtr;
90 __u32 BLFrmPtr;
91 __u32 RxFragSize;
92 __u32 Int_En;
93 __u32 FDA_Bas;
94 __u32 FDA_Lim; /* 0x20 */
95 __u32 Int_Src;
96 __u32 unused0[2];
97 __u32 PauseCnt;
98 __u32 RemPauCnt;
99 __u32 TxCtlFrmStat;
100 __u32 unused1;
101 __u32 MAC_Ctl; /* 0x40 */
102 __u32 CAM_Ctl;
103 __u32 Tx_Ctl;
104 __u32 Tx_Stat;
105 __u32 Rx_Ctl;
106 __u32 Rx_Stat;
107 __u32 MD_Data;
108 __u32 MD_CA;
109 __u32 CAM_Adr; /* 0x60 */
110 __u32 CAM_Data;
111 __u32 CAM_Ena;
112 __u32 PROM_Ctl;
113 __u32 PROM_Data;
114 __u32 Algn_Cnt;
115 __u32 CRC_Cnt;
116 __u32 Miss_Cnt;
117 };
118
119 /*
120 * Bit assignments
121 */
122 /* DMA_Ctl bit assign ------------------------------------------------------- */
123 #define DMA_RxAlign 0x00c00000 /* 1:Reception Alignment */
124 #define DMA_RxAlign_1 0x00400000
125 #define DMA_RxAlign_2 0x00800000
126 #define DMA_RxAlign_3 0x00c00000
127 #define DMA_M66EnStat 0x00080000 /* 1:66MHz Enable State */
128 #define DMA_IntMask 0x00040000 /* 1:Interrupt mask */
129 #define DMA_SWIntReq 0x00020000 /* 1:Software Interrupt request */
130 #define DMA_TxWakeUp 0x00010000 /* 1:Transmit Wake Up */
131 #define DMA_RxBigE 0x00008000 /* 1:Receive Big Endian */
132 #define DMA_TxBigE 0x00004000 /* 1:Transmit Big Endian */
133 #define DMA_TestMode 0x00002000 /* 1:Test Mode */
134 #define DMA_PowrMgmnt 0x00001000 /* 1:Power Management */
135 #define DMA_DmBurst_Mask 0x000001fc /* DMA Burst size */
136
137 /* RxFragSize bit assign ---------------------------------------------------- */
138 #define RxFrag_EnPack 0x00008000 /* 1:Enable Packing */
139 #define RxFrag_MinFragMask 0x00000ffc /* Minimum Fragment */
140
141 /* MAC_Ctl bit assign ------------------------------------------------------- */
142 #define MAC_Link10 0x00008000 /* 1:Link Status 10Mbits */
143 #define MAC_EnMissRoll 0x00002000 /* 1:Enable Missed Roll */
144 #define MAC_MissRoll 0x00000400 /* 1:Missed Roll */
145 #define MAC_Loop10 0x00000080 /* 1:Loop 10 Mbps */
146 #define MAC_Conn_Auto 0x00000000 /*00:Connection mode (Automatic) */
147 #define MAC_Conn_10M 0x00000020 /*01: (10Mbps endec)*/
148 #define MAC_Conn_Mll 0x00000040 /*10: (Mll clock) */
149 #define MAC_MacLoop 0x00000010 /* 1:MAC Loopback */
150 #define MAC_FullDup 0x00000008 /* 1:Full Duplex 0:Half Duplex */
151 #define MAC_Reset 0x00000004 /* 1:Software Reset */
152 #define MAC_HaltImm 0x00000002 /* 1:Halt Immediate */
153 #define MAC_HaltReq 0x00000001 /* 1:Halt request */
154
155 /* PROM_Ctl bit assign ------------------------------------------------------ */
156 #define PROM_Busy 0x00008000 /* 1:Busy (Start Operation) */
157 #define PROM_Read 0x00004000 /*10:Read operation */
158 #define PROM_Write 0x00002000 /*01:Write operation */
159 #define PROM_Erase 0x00006000 /*11:Erase operation */
160 /*00:Enable or Disable Writting, */
161 /* as specified in PROM_Addr. */
162 #define PROM_Addr_Ena 0x00000030 /*11xxxx:PROM Write enable */
163 /*00xxxx: disable */
164
165 /* CAM_Ctl bit assign ------------------------------------------------------- */
166 #define CAM_CompEn 0x00000010 /* 1:CAM Compare Enable */
167 #define CAM_NegCAM 0x00000008 /* 1:Reject packets CAM recognizes,*/
168 /* accept other */
169 #define CAM_BroadAcc 0x00000004 /* 1:Broadcast assept */
170 #define CAM_GroupAcc 0x00000002 /* 1:Multicast assept */
171 #define CAM_StationAcc 0x00000001 /* 1:unicast accept */
172
173 /* CAM_Ena bit assign ------------------------------------------------------- */
174 #define CAM_ENTRY_MAX 21 /* CAM Data entry max count */
175 #define CAM_Ena_Mask ((1<<CAM_ENTRY_MAX)-1) /* CAM Enable bits (Max 21bits) */
176 #define CAM_Ena_Bit(index) (1 << (index))
177 #define CAM_ENTRY_DESTINATION 0
178 #define CAM_ENTRY_SOURCE 1
179 #define CAM_ENTRY_MACCTL 20
180
181 /* Tx_Ctl bit assign -------------------------------------------------------- */
182 #define Tx_En 0x00000001 /* 1:Transmit enable */
183 #define Tx_TxHalt 0x00000002 /* 1:Transmit Halt Request */
184 #define Tx_NoPad 0x00000004 /* 1:Suppress Padding */
185 #define Tx_NoCRC 0x00000008 /* 1:Suppress Padding */
186 #define Tx_FBack 0x00000010 /* 1:Fast Back-off */
187 #define Tx_EnUnder 0x00000100 /* 1:Enable Underrun */
188 #define Tx_EnExDefer 0x00000200 /* 1:Enable Excessive Deferral */
189 #define Tx_EnLCarr 0x00000400 /* 1:Enable Lost Carrier */
190 #define Tx_EnExColl 0x00000800 /* 1:Enable Excessive Collision */
191 #define Tx_EnLateColl 0x00001000 /* 1:Enable Late Collision */
192 #define Tx_EnTxPar 0x00002000 /* 1:Enable Transmit Parity */
193 #define Tx_EnComp 0x00004000 /* 1:Enable Completion */
194
195 /* Tx_Stat bit assign ------------------------------------------------------- */
196 #define Tx_TxColl_MASK 0x0000000F /* Tx Collision Count */
197 #define Tx_ExColl 0x00000010 /* Excessive Collision */
198 #define Tx_TXDefer 0x00000020 /* Transmit Defered */
199 #define Tx_Paused 0x00000040 /* Transmit Paused */
200 #define Tx_IntTx 0x00000080 /* Interrupt on Tx */
201 #define Tx_Under 0x00000100 /* Underrun */
202 #define Tx_Defer 0x00000200 /* Deferral */
203 #define Tx_NCarr 0x00000400 /* No Carrier */
204 #define Tx_10Stat 0x00000800 /* 10Mbps Status */
205 #define Tx_LateColl 0x00001000 /* Late Collision */
206 #define Tx_TxPar 0x00002000 /* Tx Parity Error */
207 #define Tx_Comp 0x00004000 /* Completion */
208 #define Tx_Halted 0x00008000 /* Tx Halted */
209 #define Tx_SQErr 0x00010000 /* Signal Quality Error(SQE) */
210
211 /* Rx_Ctl bit assign -------------------------------------------------------- */
212 #define Rx_EnGood 0x00004000 /* 1:Enable Good */
213 #define Rx_EnRxPar 0x00002000 /* 1:Enable Receive Parity */
214 #define Rx_EnLongErr 0x00000800 /* 1:Enable Long Error */
215 #define Rx_EnOver 0x00000400 /* 1:Enable OverFlow */
216 #define Rx_EnCRCErr 0x00000200 /* 1:Enable CRC Error */
217 #define Rx_EnAlign 0x00000100 /* 1:Enable Alignment */
218 #define Rx_IgnoreCRC 0x00000040 /* 1:Ignore CRC Value */
219 #define Rx_StripCRC 0x00000010 /* 1:Strip CRC Value */
220 #define Rx_ShortEn 0x00000008 /* 1:Short Enable */
221 #define Rx_LongEn 0x00000004 /* 1:Long Enable */
222 #define Rx_RxHalt 0x00000002 /* 1:Receive Halt Request */
223 #define Rx_RxEn 0x00000001 /* 1:Receive Intrrupt Enable */
224
225 /* Rx_Stat bit assign ------------------------------------------------------- */
226 #define Rx_Halted 0x00008000 /* Rx Halted */
227 #define Rx_Good 0x00004000 /* Rx Good */
228 #define Rx_RxPar 0x00002000 /* Rx Parity Error */
229 #define Rx_TypePkt 0x00001000 /* Rx Type Packet */
230 #define Rx_LongErr 0x00000800 /* Rx Long Error */
231 #define Rx_Over 0x00000400 /* Rx Overflow */
232 #define Rx_CRCErr 0x00000200 /* Rx CRC Error */
233 #define Rx_Align 0x00000100 /* Rx Alignment Error */
234 #define Rx_10Stat 0x00000080 /* Rx 10Mbps Status */
235 #define Rx_IntRx 0x00000040 /* Rx Interrupt */
236 #define Rx_CtlRecd 0x00000020 /* Rx Control Receive */
237 #define Rx_InLenErr 0x00000010 /* Rx In Range Frame Length Error */
238
239 #define Rx_Stat_Mask 0x0000FFF0 /* Rx All Status Mask */
240
241 /* Int_En bit assign -------------------------------------------------------- */
242 #define Int_NRAbtEn 0x00000800 /* 1:Non-recoverable Abort Enable */
243 #define Int_TxCtlCmpEn 0x00000400 /* 1:Transmit Ctl Complete Enable */
244 #define Int_DmParErrEn 0x00000200 /* 1:DMA Parity Error Enable */
245 #define Int_DParDEn 0x00000100 /* 1:Data Parity Error Enable */
246 #define Int_EarNotEn 0x00000080 /* 1:Early Notify Enable */
247 #define Int_DParErrEn 0x00000040 /* 1:Detected Parity Error Enable */
248 #define Int_SSysErrEn 0x00000020 /* 1:Signalled System Error Enable */
249 #define Int_RMasAbtEn 0x00000010 /* 1:Received Master Abort Enable */
250 #define Int_RTargAbtEn 0x00000008 /* 1:Received Target Abort Enable */
251 #define Int_STargAbtEn 0x00000004 /* 1:Signalled Target Abort Enable */
252 #define Int_BLExEn 0x00000002 /* 1:Buffer List Exhausted Enable */
253 #define Int_FDAExEn 0x00000001 /* 1:Free Descriptor Area */
254 /* Exhausted Enable */
255
256 /* Int_Src bit assign ------------------------------------------------------- */
257 #define Int_NRabt 0x00004000 /* 1:Non Recoverable error */
258 #define Int_DmParErrStat 0x00002000 /* 1:DMA Parity Error & Clear */
259 #define Int_BLEx 0x00001000 /* 1:Buffer List Empty & Clear */
260 #define Int_FDAEx 0x00000800 /* 1:FDA Empty & Clear */
261 #define Int_IntNRAbt 0x00000400 /* 1:Non Recoverable Abort */
262 #define Int_IntCmp 0x00000200 /* 1:MAC control packet complete */
263 #define Int_IntExBD 0x00000100 /* 1:Interrupt Extra BD & Clear */
264 #define Int_DmParErr 0x00000080 /* 1:DMA Parity Error & Clear */
265 #define Int_IntEarNot 0x00000040 /* 1:Receive Data write & Clear */
266 #define Int_SWInt 0x00000020 /* 1:Software request & Clear */
267 #define Int_IntBLEx 0x00000010 /* 1:Buffer List Empty & Clear */
268 #define Int_IntFDAEx 0x00000008 /* 1:FDA Empty & Clear */
269 #define Int_IntPCI 0x00000004 /* 1:PCI controller & Clear */
270 #define Int_IntMacRx 0x00000002 /* 1:Rx controller & Clear */
271 #define Int_IntMacTx 0x00000001 /* 1:Tx controller & Clear */
272
273 /* MD_CA bit assign --------------------------------------------------------- */
274 #define MD_CA_PreSup 0x00001000 /* 1:Preamble Suppress */
275 #define MD_CA_Busy 0x00000800 /* 1:Busy (Start Operation) */
276 #define MD_CA_Wr 0x00000400 /* 1:Write 0:Read */
277
278
279 /*
280 * Descriptors
281 */
282
283 /* Frame descripter */
284 struct FDesc {
285 volatile __u32 FDNext;
286 volatile __u32 FDSystem;
287 volatile __u32 FDStat;
288 volatile __u32 FDCtl;
289 };
290
291 /* Buffer descripter */
292 struct BDesc {
293 volatile __u32 BuffData;
294 volatile __u32 BDCtl;
295 };
296
297 #define FD_ALIGN 16
298
299 /* Frame Descripter bit assign ---------------------------------------------- */
300 #define FD_FDLength_MASK 0x0000FFFF /* Length MASK */
301 #define FD_BDCnt_MASK 0x001F0000 /* BD count MASK in FD */
302 #define FD_FrmOpt_MASK 0x7C000000 /* Frame option MASK */
303 #define FD_FrmOpt_BigEndian 0x40000000 /* Tx/Rx */
304 #define FD_FrmOpt_IntTx 0x20000000 /* Tx only */
305 #define FD_FrmOpt_NoCRC 0x10000000 /* Tx only */
306 #define FD_FrmOpt_NoPadding 0x08000000 /* Tx only */
307 #define FD_FrmOpt_Packing 0x04000000 /* Rx only */
308 #define FD_CownsFD 0x80000000 /* FD Controller owner bit */
309 #define FD_Next_EOL 0x00000001 /* FD EOL indicator */
310 #define FD_BDCnt_SHIFT 16
311
312 /* Buffer Descripter bit assign --------------------------------------------- */
313 #define BD_BuffLength_MASK 0x0000FFFF /* Receive Data Size */
314 #define BD_RxBDID_MASK 0x00FF0000 /* BD ID Number MASK */
315 #define BD_RxBDSeqN_MASK 0x7F000000 /* Rx BD Sequence Number */
316 #define BD_CownsBD 0x80000000 /* BD Controller owner bit */
317 #define BD_RxBDID_SHIFT 16
318 #define BD_RxBDSeqN_SHIFT 24
319
320
321 /* Some useful constants. */
322
323 #define TX_CTL_CMD (Tx_EnTxPar | Tx_EnLateColl | \
324 Tx_EnExColl | Tx_EnLCarr | Tx_EnExDefer | Tx_EnUnder | \
325 Tx_En) /* maybe 0x7b01 */
326 /* Do not use Rx_StripCRC -- it causes trouble on BLEx/FDAEx condition */
327 #define RX_CTL_CMD (Rx_EnGood | Rx_EnRxPar | Rx_EnLongErr | Rx_EnOver \
328 | Rx_EnCRCErr | Rx_EnAlign | Rx_RxEn) /* maybe 0x6f01 */
329 #define INT_EN_CMD (Int_NRAbtEn | \
330 Int_DmParErrEn | Int_DParDEn | Int_DParErrEn | \
331 Int_SSysErrEn | Int_RMasAbtEn | Int_RTargAbtEn | \
332 Int_STargAbtEn | \
333 Int_BLExEn | Int_FDAExEn) /* maybe 0xb7f*/
334 #define DMA_CTL_CMD DMA_BURST_SIZE
335 #define HAVE_DMA_RXALIGN(lp) likely((lp)->chiptype != TC35815CF)
336
337 /* Tuning parameters */
338 #define DMA_BURST_SIZE 32
339 #define TX_THRESHOLD 1024
340 /* used threshold with packet max byte for low pci transfer ability.*/
341 #define TX_THRESHOLD_MAX 1536
342 /* setting threshold max value when overrun error occurred this count. */
343 #define TX_THRESHOLD_KEEP_LIMIT 10
344
345 /* 16 + RX_BUF_NUM * 8 + RX_FD_NUM * 16 + TX_FD_NUM * 32 <= PAGE_SIZE*FD_PAGE_NUM */
346 #define FD_PAGE_NUM 4
347 #define RX_BUF_NUM 128 /* < 256 */
348 #define RX_FD_NUM 256 /* >= 32 */
349 #define TX_FD_NUM 128
350 #if RX_CTL_CMD & Rx_LongEn
351 #define RX_BUF_SIZE PAGE_SIZE
352 #elif RX_CTL_CMD & Rx_StripCRC
353 #define RX_BUF_SIZE \
354 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + NET_IP_ALIGN)
355 #else
356 #define RX_BUF_SIZE \
357 L1_CACHE_ALIGN(ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN + NET_IP_ALIGN)
358 #endif
359 #define RX_FD_RESERVE (2 / 2) /* max 2 BD per RxFD */
360 #define NAPI_WEIGHT 16
361
362 struct TxFD {
363 struct FDesc fd;
364 struct BDesc bd;
365 struct BDesc unused;
366 };
367
368 struct RxFD {
369 struct FDesc fd;
370 struct BDesc bd[0]; /* variable length */
371 };
372
373 struct FrFD {
374 struct FDesc fd;
375 struct BDesc bd[RX_BUF_NUM];
376 };
377
378
379 #define tc_readl(addr) ioread32(addr)
380 #define tc_writel(d, addr) iowrite32(d, addr)
381
382 #define TC35815_TX_TIMEOUT msecs_to_jiffies(400)
383
384 /* Information that need to be kept for each controller. */
385 struct tc35815_local {
386 struct pci_dev *pci_dev;
387
388 struct net_device *dev;
389 struct napi_struct napi;
390
391 /* statistics */
392 struct {
393 int max_tx_qlen;
394 int tx_ints;
395 int rx_ints;
396 int tx_underrun;
397 } lstats;
398
399 /* Tx control lock. This protects the transmit buffer ring
400 * state along with the "tx full" state of the driver. This
401 * means all netif_queue flow control actions are protected
402 * by this lock as well.
403 */
404 spinlock_t lock;
405 spinlock_t rx_lock;
406
407 struct mii_bus *mii_bus;
408 struct phy_device *phy_dev;
409 int duplex;
410 int speed;
411 int link;
412 struct work_struct restart_work;
413
414 /*
415 * Transmitting: Batch Mode.
416 * 1 BD in 1 TxFD.
417 * Receiving: Non-Packing Mode.
418 * 1 circular FD for Free Buffer List.
419 * RX_BUF_NUM BD in Free Buffer FD.
420 * One Free Buffer BD has ETH_FRAME_LEN data buffer.
421 */
422 void *fd_buf; /* for TxFD, RxFD, FrFD */
423 dma_addr_t fd_buf_dma;
424 struct TxFD *tfd_base;
425 unsigned int tfd_start;
426 unsigned int tfd_end;
427 struct RxFD *rfd_base;
428 struct RxFD *rfd_limit;
429 struct RxFD *rfd_cur;
430 struct FrFD *fbl_ptr;
431 unsigned int fbl_count;
432 struct {
433 struct sk_buff *skb;
434 dma_addr_t skb_dma;
435 } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
436 u32 msg_enable;
437 enum tc35815_chiptype chiptype;
438 };
439
440 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
441 {
442 return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
443 }
444 #ifdef DEBUG
445 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
446 {
447 return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
448 }
449 #endif
450 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
451 struct pci_dev *hwdev,
452 dma_addr_t *dma_handle)
453 {
454 struct sk_buff *skb;
455 skb = dev_alloc_skb(RX_BUF_SIZE);
456 if (!skb)
457 return NULL;
458 *dma_handle = pci_map_single(hwdev, skb->data, RX_BUF_SIZE,
459 PCI_DMA_FROMDEVICE);
460 if (pci_dma_mapping_error(hwdev, *dma_handle)) {
461 dev_kfree_skb_any(skb);
462 return NULL;
463 }
464 skb_reserve(skb, 2); /* make IP header 4byte aligned */
465 return skb;
466 }
467
468 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
469 {
470 pci_unmap_single(hwdev, dma_handle, RX_BUF_SIZE,
471 PCI_DMA_FROMDEVICE);
472 dev_kfree_skb_any(skb);
473 }
474
475 /* Index to functions, as function prototypes. */
476
477 static int tc35815_open(struct net_device *dev);
478 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev);
479 static irqreturn_t tc35815_interrupt(int irq, void *dev_id);
480 static int tc35815_rx(struct net_device *dev, int limit);
481 static int tc35815_poll(struct napi_struct *napi, int budget);
482 static void tc35815_txdone(struct net_device *dev);
483 static int tc35815_close(struct net_device *dev);
484 static struct net_device_stats *tc35815_get_stats(struct net_device *dev);
485 static void tc35815_set_multicast_list(struct net_device *dev);
486 static void tc35815_tx_timeout(struct net_device *dev);
487 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
488 #ifdef CONFIG_NET_POLL_CONTROLLER
489 static void tc35815_poll_controller(struct net_device *dev);
490 #endif
491 static const struct ethtool_ops tc35815_ethtool_ops;
492
493 /* Example routines you must write ;->. */
494 static void tc35815_chip_reset(struct net_device *dev);
495 static void tc35815_chip_init(struct net_device *dev);
496
497 #ifdef DEBUG
498 static void panic_queues(struct net_device *dev);
499 #endif
500
501 static void tc35815_restart_work(struct work_struct *work);
502
503 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
504 {
505 struct net_device *dev = bus->priv;
506 struct tc35815_regs __iomem *tr =
507 (struct tc35815_regs __iomem *)dev->base_addr;
508 unsigned long timeout = jiffies + HZ;
509
510 tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
511 udelay(12); /* it takes 32 x 400ns at least */
512 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
513 if (time_after(jiffies, timeout))
514 return -EIO;
515 cpu_relax();
516 }
517 return tc_readl(&tr->MD_Data) & 0xffff;
518 }
519
520 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
521 {
522 struct net_device *dev = bus->priv;
523 struct tc35815_regs __iomem *tr =
524 (struct tc35815_regs __iomem *)dev->base_addr;
525 unsigned long timeout = jiffies + HZ;
526
527 tc_writel(val, &tr->MD_Data);
528 tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
529 &tr->MD_CA);
530 udelay(12); /* it takes 32 x 400ns at least */
531 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
532 if (time_after(jiffies, timeout))
533 return -EIO;
534 cpu_relax();
535 }
536 return 0;
537 }
538
539 static void tc_handle_link_change(struct net_device *dev)
540 {
541 struct tc35815_local *lp = netdev_priv(dev);
542 struct phy_device *phydev = lp->phy_dev;
543 unsigned long flags;
544 int status_change = 0;
545
546 spin_lock_irqsave(&lp->lock, flags);
547 if (phydev->link &&
548 (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
549 struct tc35815_regs __iomem *tr =
550 (struct tc35815_regs __iomem *)dev->base_addr;
551 u32 reg;
552
553 reg = tc_readl(&tr->MAC_Ctl);
554 reg |= MAC_HaltReq;
555 tc_writel(reg, &tr->MAC_Ctl);
556 if (phydev->duplex == DUPLEX_FULL)
557 reg |= MAC_FullDup;
558 else
559 reg &= ~MAC_FullDup;
560 tc_writel(reg, &tr->MAC_Ctl);
561 reg &= ~MAC_HaltReq;
562 tc_writel(reg, &tr->MAC_Ctl);
563
564 /*
565 * TX4939 PCFG.SPEEDn bit will be changed on
566 * NETDEV_CHANGE event.
567 */
568 /*
569 * WORKAROUND: enable LostCrS only if half duplex
570 * operation.
571 * (TX4939 does not have EnLCarr)
572 */
573 if (phydev->duplex == DUPLEX_HALF &&
574 lp->chiptype != TC35815_TX4939)
575 tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
576 &tr->Tx_Ctl);
577
578 lp->speed = phydev->speed;
579 lp->duplex = phydev->duplex;
580 status_change = 1;
581 }
582
583 if (phydev->link != lp->link) {
584 if (phydev->link) {
585 /* delayed promiscuous enabling */
586 if (dev->flags & IFF_PROMISC)
587 tc35815_set_multicast_list(dev);
588 } else {
589 lp->speed = 0;
590 lp->duplex = -1;
591 }
592 lp->link = phydev->link;
593
594 status_change = 1;
595 }
596 spin_unlock_irqrestore(&lp->lock, flags);
597
598 if (status_change && netif_msg_link(lp)) {
599 phy_print_status(phydev);
600 pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
601 dev->name,
602 phy_read(phydev, MII_BMCR),
603 phy_read(phydev, MII_BMSR),
604 phy_read(phydev, MII_LPA));
605 }
606 }
607
608 static int tc_mii_probe(struct net_device *dev)
609 {
610 struct tc35815_local *lp = netdev_priv(dev);
611 struct phy_device *phydev = NULL;
612 int phy_addr;
613 u32 dropmask;
614
615 /* find the first phy */
616 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
617 if (lp->mii_bus->phy_map[phy_addr]) {
618 if (phydev) {
619 printk(KERN_ERR "%s: multiple PHYs found\n",
620 dev->name);
621 return -EINVAL;
622 }
623 phydev = lp->mii_bus->phy_map[phy_addr];
624 break;
625 }
626 }
627
628 if (!phydev) {
629 printk(KERN_ERR "%s: no PHY found\n", dev->name);
630 return -ENODEV;
631 }
632
633 /* attach the mac to the phy */
634 phydev = phy_connect(dev, dev_name(&phydev->dev),
635 &tc_handle_link_change, 0,
636 lp->chiptype == TC35815_TX4939 ?
637 PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
638 if (IS_ERR(phydev)) {
639 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
640 return PTR_ERR(phydev);
641 }
642 printk(KERN_INFO "%s: attached PHY driver [%s] "
643 "(mii_bus:phy_addr=%s, id=%x)\n",
644 dev->name, phydev->drv->name, dev_name(&phydev->dev),
645 phydev->phy_id);
646
647 /* mask with MAC supported features */
648 phydev->supported &= PHY_BASIC_FEATURES;
649 dropmask = 0;
650 if (options.speed == 10)
651 dropmask |= SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
652 else if (options.speed == 100)
653 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full;
654 if (options.duplex == 1)
655 dropmask |= SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full;
656 else if (options.duplex == 2)
657 dropmask |= SUPPORTED_10baseT_Half | SUPPORTED_100baseT_Half;
658 phydev->supported &= ~dropmask;
659 phydev->advertising = phydev->supported;
660
661 lp->link = 0;
662 lp->speed = 0;
663 lp->duplex = -1;
664 lp->phy_dev = phydev;
665
666 return 0;
667 }
668
669 static int tc_mii_init(struct net_device *dev)
670 {
671 struct tc35815_local *lp = netdev_priv(dev);
672 int err;
673 int i;
674
675 lp->mii_bus = mdiobus_alloc();
676 if (lp->mii_bus == NULL) {
677 err = -ENOMEM;
678 goto err_out;
679 }
680
681 lp->mii_bus->name = "tc35815_mii_bus";
682 lp->mii_bus->read = tc_mdio_read;
683 lp->mii_bus->write = tc_mdio_write;
684 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
685 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
686 lp->mii_bus->priv = dev;
687 lp->mii_bus->parent = &lp->pci_dev->dev;
688 lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
689 if (!lp->mii_bus->irq) {
690 err = -ENOMEM;
691 goto err_out_free_mii_bus;
692 }
693
694 for (i = 0; i < PHY_MAX_ADDR; i++)
695 lp->mii_bus->irq[i] = PHY_POLL;
696
697 err = mdiobus_register(lp->mii_bus);
698 if (err)
699 goto err_out_free_mdio_irq;
700 err = tc_mii_probe(dev);
701 if (err)
702 goto err_out_unregister_bus;
703 return 0;
704
705 err_out_unregister_bus:
706 mdiobus_unregister(lp->mii_bus);
707 err_out_free_mdio_irq:
708 kfree(lp->mii_bus->irq);
709 err_out_free_mii_bus:
710 mdiobus_free(lp->mii_bus);
711 err_out:
712 return err;
713 }
714
715 #ifdef CONFIG_CPU_TX49XX
716 /*
717 * Find a platform_device providing a MAC address. The platform code
718 * should provide a "tc35815-mac" device with a MAC address in its
719 * platform_data.
720 */
721 static int __devinit tc35815_mac_match(struct device *dev, void *data)
722 {
723 struct platform_device *plat_dev = to_platform_device(dev);
724 struct pci_dev *pci_dev = data;
725 unsigned int id = pci_dev->irq;
726 return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
727 }
728
729 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
730 {
731 struct tc35815_local *lp = netdev_priv(dev);
732 struct device *pd = bus_find_device(&platform_bus_type, NULL,
733 lp->pci_dev, tc35815_mac_match);
734 if (pd) {
735 if (pd->platform_data)
736 memcpy(dev->dev_addr, pd->platform_data, ETH_ALEN);
737 put_device(pd);
738 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
739 }
740 return -ENODEV;
741 }
742 #else
743 static int __devinit tc35815_read_plat_dev_addr(struct net_device *dev)
744 {
745 return -ENODEV;
746 }
747 #endif
748
749 static int __devinit tc35815_init_dev_addr(struct net_device *dev)
750 {
751 struct tc35815_regs __iomem *tr =
752 (struct tc35815_regs __iomem *)dev->base_addr;
753 int i;
754
755 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
756 ;
757 for (i = 0; i < 6; i += 2) {
758 unsigned short data;
759 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
760 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
761 ;
762 data = tc_readl(&tr->PROM_Data);
763 dev->dev_addr[i] = data & 0xff;
764 dev->dev_addr[i+1] = data >> 8;
765 }
766 if (!is_valid_ether_addr(dev->dev_addr))
767 return tc35815_read_plat_dev_addr(dev);
768 return 0;
769 }
770
771 static const struct net_device_ops tc35815_netdev_ops = {
772 .ndo_open = tc35815_open,
773 .ndo_stop = tc35815_close,
774 .ndo_start_xmit = tc35815_send_packet,
775 .ndo_get_stats = tc35815_get_stats,
776 .ndo_set_multicast_list = tc35815_set_multicast_list,
777 .ndo_tx_timeout = tc35815_tx_timeout,
778 .ndo_do_ioctl = tc35815_ioctl,
779 .ndo_validate_addr = eth_validate_addr,
780 .ndo_change_mtu = eth_change_mtu,
781 .ndo_set_mac_address = eth_mac_addr,
782 #ifdef CONFIG_NET_POLL_CONTROLLER
783 .ndo_poll_controller = tc35815_poll_controller,
784 #endif
785 };
786
787 static int __devinit tc35815_init_one(struct pci_dev *pdev,
788 const struct pci_device_id *ent)
789 {
790 void __iomem *ioaddr = NULL;
791 struct net_device *dev;
792 struct tc35815_local *lp;
793 int rc;
794
795 static int printed_version;
796 if (!printed_version++) {
797 printk(version);
798 dev_printk(KERN_DEBUG, &pdev->dev,
799 "speed:%d duplex:%d\n",
800 options.speed, options.duplex);
801 }
802
803 if (!pdev->irq) {
804 dev_warn(&pdev->dev, "no IRQ assigned.\n");
805 return -ENODEV;
806 }
807
808 /* dev zeroed in alloc_etherdev */
809 dev = alloc_etherdev(sizeof(*lp));
810 if (dev == NULL) {
811 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
812 return -ENOMEM;
813 }
814 SET_NETDEV_DEV(dev, &pdev->dev);
815 lp = netdev_priv(dev);
816 lp->dev = dev;
817
818 /* enable device (incl. PCI PM wakeup), and bus-mastering */
819 rc = pcim_enable_device(pdev);
820 if (rc)
821 goto err_out;
822 rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
823 if (rc)
824 goto err_out;
825 pci_set_master(pdev);
826 ioaddr = pcim_iomap_table(pdev)[1];
827
828 /* Initialize the device structure. */
829 dev->netdev_ops = &tc35815_netdev_ops;
830 dev->ethtool_ops = &tc35815_ethtool_ops;
831 dev->watchdog_timeo = TC35815_TX_TIMEOUT;
832 netif_napi_add(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
833
834 dev->irq = pdev->irq;
835 dev->base_addr = (unsigned long)ioaddr;
836
837 INIT_WORK(&lp->restart_work, tc35815_restart_work);
838 spin_lock_init(&lp->lock);
839 spin_lock_init(&lp->rx_lock);
840 lp->pci_dev = pdev;
841 lp->chiptype = ent->driver_data;
842
843 lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
844 pci_set_drvdata(pdev, dev);
845
846 /* Soft reset the chip. */
847 tc35815_chip_reset(dev);
848
849 /* Retrieve the ethernet address. */
850 if (tc35815_init_dev_addr(dev)) {
851 dev_warn(&pdev->dev, "not valid ether addr\n");
852 random_ether_addr(dev->dev_addr);
853 }
854
855 rc = register_netdev(dev);
856 if (rc)
857 goto err_out;
858
859 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
860 printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
861 dev->name,
862 chip_info[ent->driver_data].name,
863 dev->base_addr,
864 dev->dev_addr,
865 dev->irq);
866
867 rc = tc_mii_init(dev);
868 if (rc)
869 goto err_out_unregister;
870
871 return 0;
872
873 err_out_unregister:
874 unregister_netdev(dev);
875 err_out:
876 free_netdev(dev);
877 return rc;
878 }
879
880
881 static void __devexit tc35815_remove_one(struct pci_dev *pdev)
882 {
883 struct net_device *dev = pci_get_drvdata(pdev);
884 struct tc35815_local *lp = netdev_priv(dev);
885
886 phy_disconnect(lp->phy_dev);
887 mdiobus_unregister(lp->mii_bus);
888 kfree(lp->mii_bus->irq);
889 mdiobus_free(lp->mii_bus);
890 unregister_netdev(dev);
891 free_netdev(dev);
892 pci_set_drvdata(pdev, NULL);
893 }
894
895 static int
896 tc35815_init_queues(struct net_device *dev)
897 {
898 struct tc35815_local *lp = netdev_priv(dev);
899 int i;
900 unsigned long fd_addr;
901
902 if (!lp->fd_buf) {
903 BUG_ON(sizeof(struct FDesc) +
904 sizeof(struct BDesc) * RX_BUF_NUM +
905 sizeof(struct FDesc) * RX_FD_NUM +
906 sizeof(struct TxFD) * TX_FD_NUM >
907 PAGE_SIZE * FD_PAGE_NUM);
908
909 lp->fd_buf = pci_alloc_consistent(lp->pci_dev,
910 PAGE_SIZE * FD_PAGE_NUM,
911 &lp->fd_buf_dma);
912 if (!lp->fd_buf)
913 return -ENOMEM;
914 for (i = 0; i < RX_BUF_NUM; i++) {
915 lp->rx_skbs[i].skb =
916 alloc_rxbuf_skb(dev, lp->pci_dev,
917 &lp->rx_skbs[i].skb_dma);
918 if (!lp->rx_skbs[i].skb) {
919 while (--i >= 0) {
920 free_rxbuf_skb(lp->pci_dev,
921 lp->rx_skbs[i].skb,
922 lp->rx_skbs[i].skb_dma);
923 lp->rx_skbs[i].skb = NULL;
924 }
925 pci_free_consistent(lp->pci_dev,
926 PAGE_SIZE * FD_PAGE_NUM,
927 lp->fd_buf,
928 lp->fd_buf_dma);
929 lp->fd_buf = NULL;
930 return -ENOMEM;
931 }
932 }
933 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
934 dev->name, lp->fd_buf);
935 printk("\n");
936 } else {
937 for (i = 0; i < FD_PAGE_NUM; i++)
938 clear_page((void *)((unsigned long)lp->fd_buf +
939 i * PAGE_SIZE));
940 }
941 fd_addr = (unsigned long)lp->fd_buf;
942
943 /* Free Descriptors (for Receive) */
944 lp->rfd_base = (struct RxFD *)fd_addr;
945 fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
946 for (i = 0; i < RX_FD_NUM; i++)
947 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
948 lp->rfd_cur = lp->rfd_base;
949 lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
950
951 /* Transmit Descriptors */
952 lp->tfd_base = (struct TxFD *)fd_addr;
953 fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
954 for (i = 0; i < TX_FD_NUM; i++) {
955 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
956 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
957 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
958 }
959 lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
960 lp->tfd_start = 0;
961 lp->tfd_end = 0;
962
963 /* Buffer List (for Receive) */
964 lp->fbl_ptr = (struct FrFD *)fd_addr;
965 lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
966 lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
967 /*
968 * move all allocated skbs to head of rx_skbs[] array.
969 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
970 * tc35815_rx() had failed.
971 */
972 lp->fbl_count = 0;
973 for (i = 0; i < RX_BUF_NUM; i++) {
974 if (lp->rx_skbs[i].skb) {
975 if (i != lp->fbl_count) {
976 lp->rx_skbs[lp->fbl_count].skb =
977 lp->rx_skbs[i].skb;
978 lp->rx_skbs[lp->fbl_count].skb_dma =
979 lp->rx_skbs[i].skb_dma;
980 }
981 lp->fbl_count++;
982 }
983 }
984 for (i = 0; i < RX_BUF_NUM; i++) {
985 if (i >= lp->fbl_count) {
986 lp->fbl_ptr->bd[i].BuffData = 0;
987 lp->fbl_ptr->bd[i].BDCtl = 0;
988 continue;
989 }
990 lp->fbl_ptr->bd[i].BuffData =
991 cpu_to_le32(lp->rx_skbs[i].skb_dma);
992 /* BDID is index of FrFD.bd[] */
993 lp->fbl_ptr->bd[i].BDCtl =
994 cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
995 RX_BUF_SIZE);
996 }
997
998 printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
999 dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
1000 return 0;
1001 }
1002
1003 static void
1004 tc35815_clear_queues(struct net_device *dev)
1005 {
1006 struct tc35815_local *lp = netdev_priv(dev);
1007 int i;
1008
1009 for (i = 0; i < TX_FD_NUM; i++) {
1010 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1011 struct sk_buff *skb =
1012 fdsystem != 0xffffffff ?
1013 lp->tx_skbs[fdsystem].skb : NULL;
1014 #ifdef DEBUG
1015 if (lp->tx_skbs[i].skb != skb) {
1016 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1017 panic_queues(dev);
1018 }
1019 #else
1020 BUG_ON(lp->tx_skbs[i].skb != skb);
1021 #endif
1022 if (skb) {
1023 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1024 lp->tx_skbs[i].skb = NULL;
1025 lp->tx_skbs[i].skb_dma = 0;
1026 dev_kfree_skb_any(skb);
1027 }
1028 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1029 }
1030
1031 tc35815_init_queues(dev);
1032 }
1033
1034 static void
1035 tc35815_free_queues(struct net_device *dev)
1036 {
1037 struct tc35815_local *lp = netdev_priv(dev);
1038 int i;
1039
1040 if (lp->tfd_base) {
1041 for (i = 0; i < TX_FD_NUM; i++) {
1042 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1043 struct sk_buff *skb =
1044 fdsystem != 0xffffffff ?
1045 lp->tx_skbs[fdsystem].skb : NULL;
1046 #ifdef DEBUG
1047 if (lp->tx_skbs[i].skb != skb) {
1048 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1049 panic_queues(dev);
1050 }
1051 #else
1052 BUG_ON(lp->tx_skbs[i].skb != skb);
1053 #endif
1054 if (skb) {
1055 dev_kfree_skb(skb);
1056 pci_unmap_single(lp->pci_dev, lp->tx_skbs[i].skb_dma, skb->len, PCI_DMA_TODEVICE);
1057 lp->tx_skbs[i].skb = NULL;
1058 lp->tx_skbs[i].skb_dma = 0;
1059 }
1060 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1061 }
1062 }
1063
1064 lp->rfd_base = NULL;
1065 lp->rfd_limit = NULL;
1066 lp->rfd_cur = NULL;
1067 lp->fbl_ptr = NULL;
1068
1069 for (i = 0; i < RX_BUF_NUM; i++) {
1070 if (lp->rx_skbs[i].skb) {
1071 free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1072 lp->rx_skbs[i].skb_dma);
1073 lp->rx_skbs[i].skb = NULL;
1074 }
1075 }
1076 if (lp->fd_buf) {
1077 pci_free_consistent(lp->pci_dev, PAGE_SIZE * FD_PAGE_NUM,
1078 lp->fd_buf, lp->fd_buf_dma);
1079 lp->fd_buf = NULL;
1080 }
1081 }
1082
1083 static void
1084 dump_txfd(struct TxFD *fd)
1085 {
1086 printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1087 le32_to_cpu(fd->fd.FDNext),
1088 le32_to_cpu(fd->fd.FDSystem),
1089 le32_to_cpu(fd->fd.FDStat),
1090 le32_to_cpu(fd->fd.FDCtl));
1091 printk("BD: ");
1092 printk(" %08x %08x",
1093 le32_to_cpu(fd->bd.BuffData),
1094 le32_to_cpu(fd->bd.BDCtl));
1095 printk("\n");
1096 }
1097
1098 static int
1099 dump_rxfd(struct RxFD *fd)
1100 {
1101 int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1102 if (bd_count > 8)
1103 bd_count = 8;
1104 printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1105 le32_to_cpu(fd->fd.FDNext),
1106 le32_to_cpu(fd->fd.FDSystem),
1107 le32_to_cpu(fd->fd.FDStat),
1108 le32_to_cpu(fd->fd.FDCtl));
1109 if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1110 return 0;
1111 printk("BD: ");
1112 for (i = 0; i < bd_count; i++)
1113 printk(" %08x %08x",
1114 le32_to_cpu(fd->bd[i].BuffData),
1115 le32_to_cpu(fd->bd[i].BDCtl));
1116 printk("\n");
1117 return bd_count;
1118 }
1119
1120 #ifdef DEBUG
1121 static void
1122 dump_frfd(struct FrFD *fd)
1123 {
1124 int i;
1125 printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1126 le32_to_cpu(fd->fd.FDNext),
1127 le32_to_cpu(fd->fd.FDSystem),
1128 le32_to_cpu(fd->fd.FDStat),
1129 le32_to_cpu(fd->fd.FDCtl));
1130 printk("BD: ");
1131 for (i = 0; i < RX_BUF_NUM; i++)
1132 printk(" %08x %08x",
1133 le32_to_cpu(fd->bd[i].BuffData),
1134 le32_to_cpu(fd->bd[i].BDCtl));
1135 printk("\n");
1136 }
1137
1138 static void
1139 panic_queues(struct net_device *dev)
1140 {
1141 struct tc35815_local *lp = netdev_priv(dev);
1142 int i;
1143
1144 printk("TxFD base %p, start %u, end %u\n",
1145 lp->tfd_base, lp->tfd_start, lp->tfd_end);
1146 printk("RxFD base %p limit %p cur %p\n",
1147 lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1148 printk("FrFD %p\n", lp->fbl_ptr);
1149 for (i = 0; i < TX_FD_NUM; i++)
1150 dump_txfd(&lp->tfd_base[i]);
1151 for (i = 0; i < RX_FD_NUM; i++) {
1152 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1153 i += (bd_count + 1) / 2; /* skip BDs */
1154 }
1155 dump_frfd(lp->fbl_ptr);
1156 panic("%s: Illegal queue state.", dev->name);
1157 }
1158 #endif
1159
1160 static void print_eth(const u8 *add)
1161 {
1162 printk(KERN_DEBUG "print_eth(%p)\n", add);
1163 printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1164 add + 6, add, add[12], add[13]);
1165 }
1166
1167 static int tc35815_tx_full(struct net_device *dev)
1168 {
1169 struct tc35815_local *lp = netdev_priv(dev);
1170 return (lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end;
1171 }
1172
1173 static void tc35815_restart(struct net_device *dev)
1174 {
1175 struct tc35815_local *lp = netdev_priv(dev);
1176
1177 if (lp->phy_dev) {
1178 int timeout;
1179
1180 phy_write(lp->phy_dev, MII_BMCR, BMCR_RESET);
1181 timeout = 100;
1182 while (--timeout) {
1183 if (!(phy_read(lp->phy_dev, MII_BMCR) & BMCR_RESET))
1184 break;
1185 udelay(1);
1186 }
1187 if (!timeout)
1188 printk(KERN_ERR "%s: BMCR reset failed.\n", dev->name);
1189 }
1190
1191 spin_lock_bh(&lp->rx_lock);
1192 spin_lock_irq(&lp->lock);
1193 tc35815_chip_reset(dev);
1194 tc35815_clear_queues(dev);
1195 tc35815_chip_init(dev);
1196 /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1197 tc35815_set_multicast_list(dev);
1198 spin_unlock_irq(&lp->lock);
1199 spin_unlock_bh(&lp->rx_lock);
1200
1201 netif_wake_queue(dev);
1202 }
1203
1204 static void tc35815_restart_work(struct work_struct *work)
1205 {
1206 struct tc35815_local *lp =
1207 container_of(work, struct tc35815_local, restart_work);
1208 struct net_device *dev = lp->dev;
1209
1210 tc35815_restart(dev);
1211 }
1212
1213 static void tc35815_schedule_restart(struct net_device *dev)
1214 {
1215 struct tc35815_local *lp = netdev_priv(dev);
1216 struct tc35815_regs __iomem *tr =
1217 (struct tc35815_regs __iomem *)dev->base_addr;
1218 unsigned long flags;
1219
1220 /* disable interrupts */
1221 spin_lock_irqsave(&lp->lock, flags);
1222 tc_writel(0, &tr->Int_En);
1223 tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1224 schedule_work(&lp->restart_work);
1225 spin_unlock_irqrestore(&lp->lock, flags);
1226 }
1227
1228 static void tc35815_tx_timeout(struct net_device *dev)
1229 {
1230 struct tc35815_regs __iomem *tr =
1231 (struct tc35815_regs __iomem *)dev->base_addr;
1232
1233 printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1234 dev->name, tc_readl(&tr->Tx_Stat));
1235
1236 /* Try to restart the adaptor. */
1237 tc35815_schedule_restart(dev);
1238 dev->stats.tx_errors++;
1239 }
1240
1241 /*
1242 * Open/initialize the controller. This is called (in the current kernel)
1243 * sometime after booting when the 'ifconfig' program is run.
1244 *
1245 * This routine should set everything up anew at each open, even
1246 * registers that "should" only need to be set once at boot, so that
1247 * there is non-reboot way to recover if something goes wrong.
1248 */
1249 static int
1250 tc35815_open(struct net_device *dev)
1251 {
1252 struct tc35815_local *lp = netdev_priv(dev);
1253
1254 /*
1255 * This is used if the interrupt line can turned off (shared).
1256 * See 3c503.c for an example of selecting the IRQ at config-time.
1257 */
1258 if (request_irq(dev->irq, tc35815_interrupt, IRQF_SHARED,
1259 dev->name, dev))
1260 return -EAGAIN;
1261
1262 tc35815_chip_reset(dev);
1263
1264 if (tc35815_init_queues(dev) != 0) {
1265 free_irq(dev->irq, dev);
1266 return -EAGAIN;
1267 }
1268
1269 napi_enable(&lp->napi);
1270
1271 /* Reset the hardware here. Don't forget to set the station address. */
1272 spin_lock_irq(&lp->lock);
1273 tc35815_chip_init(dev);
1274 spin_unlock_irq(&lp->lock);
1275
1276 netif_carrier_off(dev);
1277 /* schedule a link state check */
1278 phy_start(lp->phy_dev);
1279
1280 /* We are now ready to accept transmit requeusts from
1281 * the queueing layer of the networking.
1282 */
1283 netif_start_queue(dev);
1284
1285 return 0;
1286 }
1287
1288 /* This will only be invoked if your driver is _not_ in XOFF state.
1289 * What this means is that you need not check it, and that this
1290 * invariant will hold if you make sure that the netif_*_queue()
1291 * calls are done at the proper times.
1292 */
1293 static int tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1294 {
1295 struct tc35815_local *lp = netdev_priv(dev);
1296 struct TxFD *txfd;
1297 unsigned long flags;
1298
1299 /* If some error occurs while trying to transmit this
1300 * packet, you should return '1' from this function.
1301 * In such a case you _may not_ do anything to the
1302 * SKB, it is still owned by the network queueing
1303 * layer when an error is returned. This means you
1304 * may not modify any SKB fields, you may not free
1305 * the SKB, etc.
1306 */
1307
1308 /* This is the most common case for modern hardware.
1309 * The spinlock protects this code from the TX complete
1310 * hardware interrupt handler. Queue flow control is
1311 * thus managed under this lock as well.
1312 */
1313 spin_lock_irqsave(&lp->lock, flags);
1314
1315 /* failsafe... (handle txdone now if half of FDs are used) */
1316 if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1317 TX_FD_NUM / 2)
1318 tc35815_txdone(dev);
1319
1320 if (netif_msg_pktdata(lp))
1321 print_eth(skb->data);
1322 #ifdef DEBUG
1323 if (lp->tx_skbs[lp->tfd_start].skb) {
1324 printk("%s: tx_skbs conflict.\n", dev->name);
1325 panic_queues(dev);
1326 }
1327 #else
1328 BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1329 #endif
1330 lp->tx_skbs[lp->tfd_start].skb = skb;
1331 lp->tx_skbs[lp->tfd_start].skb_dma = pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1332
1333 /*add to ring */
1334 txfd = &lp->tfd_base[lp->tfd_start];
1335 txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1336 txfd->bd.BDCtl = cpu_to_le32(skb->len);
1337 txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1338 txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1339
1340 if (lp->tfd_start == lp->tfd_end) {
1341 struct tc35815_regs __iomem *tr =
1342 (struct tc35815_regs __iomem *)dev->base_addr;
1343 /* Start DMA Transmitter. */
1344 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1345 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1346 if (netif_msg_tx_queued(lp)) {
1347 printk("%s: starting TxFD.\n", dev->name);
1348 dump_txfd(txfd);
1349 }
1350 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1351 } else {
1352 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1353 if (netif_msg_tx_queued(lp)) {
1354 printk("%s: queueing TxFD.\n", dev->name);
1355 dump_txfd(txfd);
1356 }
1357 }
1358 lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1359
1360 /* If we just used up the very last entry in the
1361 * TX ring on this device, tell the queueing
1362 * layer to send no more.
1363 */
1364 if (tc35815_tx_full(dev)) {
1365 if (netif_msg_tx_queued(lp))
1366 printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1367 netif_stop_queue(dev);
1368 }
1369
1370 /* When the TX completion hw interrupt arrives, this
1371 * is when the transmit statistics are updated.
1372 */
1373
1374 spin_unlock_irqrestore(&lp->lock, flags);
1375 return NETDEV_TX_OK;
1376 }
1377
1378 #define FATAL_ERROR_INT \
1379 (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
1380 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1381 {
1382 static int count;
1383 printk(KERN_WARNING "%s: Fatal Error Intterrupt (%#x):",
1384 dev->name, status);
1385 if (status & Int_IntPCI)
1386 printk(" IntPCI");
1387 if (status & Int_DmParErr)
1388 printk(" DmParErr");
1389 if (status & Int_IntNRAbt)
1390 printk(" IntNRAbt");
1391 printk("\n");
1392 if (count++ > 100)
1393 panic("%s: Too many fatal errors.", dev->name);
1394 printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1395 /* Try to restart the adaptor. */
1396 tc35815_schedule_restart(dev);
1397 }
1398
1399 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1400 {
1401 struct tc35815_local *lp = netdev_priv(dev);
1402 int ret = -1;
1403
1404 /* Fatal errors... */
1405 if (status & FATAL_ERROR_INT) {
1406 tc35815_fatal_error_interrupt(dev, status);
1407 return 0;
1408 }
1409 /* recoverable errors */
1410 if (status & Int_IntFDAEx) {
1411 if (netif_msg_rx_err(lp))
1412 dev_warn(&dev->dev,
1413 "Free Descriptor Area Exhausted (%#x).\n",
1414 status);
1415 dev->stats.rx_dropped++;
1416 ret = 0;
1417 }
1418 if (status & Int_IntBLEx) {
1419 if (netif_msg_rx_err(lp))
1420 dev_warn(&dev->dev,
1421 "Buffer List Exhausted (%#x).\n",
1422 status);
1423 dev->stats.rx_dropped++;
1424 ret = 0;
1425 }
1426 if (status & Int_IntExBD) {
1427 if (netif_msg_rx_err(lp))
1428 dev_warn(&dev->dev,
1429 "Excessive Buffer Descriptiors (%#x).\n",
1430 status);
1431 dev->stats.rx_length_errors++;
1432 ret = 0;
1433 }
1434
1435 /* normal notification */
1436 if (status & Int_IntMacRx) {
1437 /* Got a packet(s). */
1438 ret = tc35815_rx(dev, limit);
1439 lp->lstats.rx_ints++;
1440 }
1441 if (status & Int_IntMacTx) {
1442 /* Transmit complete. */
1443 lp->lstats.tx_ints++;
1444 spin_lock_irq(&lp->lock);
1445 tc35815_txdone(dev);
1446 spin_unlock_irq(&lp->lock);
1447 if (ret < 0)
1448 ret = 0;
1449 }
1450 return ret;
1451 }
1452
1453 /*
1454 * The typical workload of the driver:
1455 * Handle the network interface interrupts.
1456 */
1457 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1458 {
1459 struct net_device *dev = dev_id;
1460 struct tc35815_local *lp = netdev_priv(dev);
1461 struct tc35815_regs __iomem *tr =
1462 (struct tc35815_regs __iomem *)dev->base_addr;
1463 u32 dmactl = tc_readl(&tr->DMA_Ctl);
1464
1465 if (!(dmactl & DMA_IntMask)) {
1466 /* disable interrupts */
1467 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1468 if (napi_schedule_prep(&lp->napi))
1469 __napi_schedule(&lp->napi);
1470 else {
1471 printk(KERN_ERR "%s: interrupt taken in poll\n",
1472 dev->name);
1473 BUG();
1474 }
1475 (void)tc_readl(&tr->Int_Src); /* flush */
1476 return IRQ_HANDLED;
1477 }
1478 return IRQ_NONE;
1479 }
1480
1481 #ifdef CONFIG_NET_POLL_CONTROLLER
1482 static void tc35815_poll_controller(struct net_device *dev)
1483 {
1484 disable_irq(dev->irq);
1485 tc35815_interrupt(dev->irq, dev);
1486 enable_irq(dev->irq);
1487 }
1488 #endif
1489
1490 /* We have a good packet(s), get it/them out of the buffers. */
1491 static int
1492 tc35815_rx(struct net_device *dev, int limit)
1493 {
1494 struct tc35815_local *lp = netdev_priv(dev);
1495 unsigned int fdctl;
1496 int i;
1497 int received = 0;
1498
1499 while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1500 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1501 int pkt_len = fdctl & FD_FDLength_MASK;
1502 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1503 #ifdef DEBUG
1504 struct RxFD *next_rfd;
1505 #endif
1506 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1507 pkt_len -= ETH_FCS_LEN;
1508 #endif
1509
1510 if (netif_msg_rx_status(lp))
1511 dump_rxfd(lp->rfd_cur);
1512 if (status & Rx_Good) {
1513 struct sk_buff *skb;
1514 unsigned char *data;
1515 int cur_bd;
1516
1517 if (--limit < 0)
1518 break;
1519 BUG_ON(bd_count > 1);
1520 cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1521 & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1522 #ifdef DEBUG
1523 if (cur_bd >= RX_BUF_NUM) {
1524 printk("%s: invalid BDID.\n", dev->name);
1525 panic_queues(dev);
1526 }
1527 BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1528 (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1529 if (!lp->rx_skbs[cur_bd].skb) {
1530 printk("%s: NULL skb.\n", dev->name);
1531 panic_queues(dev);
1532 }
1533 #else
1534 BUG_ON(cur_bd >= RX_BUF_NUM);
1535 #endif
1536 skb = lp->rx_skbs[cur_bd].skb;
1537 prefetch(skb->data);
1538 lp->rx_skbs[cur_bd].skb = NULL;
1539 pci_unmap_single(lp->pci_dev,
1540 lp->rx_skbs[cur_bd].skb_dma,
1541 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
1542 if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN)
1543 memmove(skb->data, skb->data - NET_IP_ALIGN,
1544 pkt_len);
1545 data = skb_put(skb, pkt_len);
1546 if (netif_msg_pktdata(lp))
1547 print_eth(data);
1548 skb->protocol = eth_type_trans(skb, dev);
1549 netif_receive_skb(skb);
1550 received++;
1551 dev->stats.rx_packets++;
1552 dev->stats.rx_bytes += pkt_len;
1553 } else {
1554 dev->stats.rx_errors++;
1555 if (netif_msg_rx_err(lp))
1556 dev_info(&dev->dev, "Rx error (status %x)\n",
1557 status & Rx_Stat_Mask);
1558 /* WORKAROUND: LongErr and CRCErr means Overflow. */
1559 if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1560 status &= ~(Rx_LongErr|Rx_CRCErr);
1561 status |= Rx_Over;
1562 }
1563 if (status & Rx_LongErr)
1564 dev->stats.rx_length_errors++;
1565 if (status & Rx_Over)
1566 dev->stats.rx_fifo_errors++;
1567 if (status & Rx_CRCErr)
1568 dev->stats.rx_crc_errors++;
1569 if (status & Rx_Align)
1570 dev->stats.rx_frame_errors++;
1571 }
1572
1573 if (bd_count > 0) {
1574 /* put Free Buffer back to controller */
1575 int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1576 unsigned char id =
1577 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1578 #ifdef DEBUG
1579 if (id >= RX_BUF_NUM) {
1580 printk("%s: invalid BDID.\n", dev->name);
1581 panic_queues(dev);
1582 }
1583 #else
1584 BUG_ON(id >= RX_BUF_NUM);
1585 #endif
1586 /* free old buffers */
1587 lp->fbl_count--;
1588 while (lp->fbl_count < RX_BUF_NUM)
1589 {
1590 unsigned char curid =
1591 (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1592 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1593 #ifdef DEBUG
1594 bdctl = le32_to_cpu(bd->BDCtl);
1595 if (bdctl & BD_CownsBD) {
1596 printk("%s: Freeing invalid BD.\n",
1597 dev->name);
1598 panic_queues(dev);
1599 }
1600 #endif
1601 /* pass BD to controller */
1602 if (!lp->rx_skbs[curid].skb) {
1603 lp->rx_skbs[curid].skb =
1604 alloc_rxbuf_skb(dev,
1605 lp->pci_dev,
1606 &lp->rx_skbs[curid].skb_dma);
1607 if (!lp->rx_skbs[curid].skb)
1608 break; /* try on next reception */
1609 bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1610 }
1611 /* Note: BDLength was modified by chip. */
1612 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1613 (curid << BD_RxBDID_SHIFT) |
1614 RX_BUF_SIZE);
1615 lp->fbl_count++;
1616 }
1617 }
1618
1619 /* put RxFD back to controller */
1620 #ifdef DEBUG
1621 next_rfd = fd_bus_to_virt(lp,
1622 le32_to_cpu(lp->rfd_cur->fd.FDNext));
1623 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1624 printk("%s: RxFD FDNext invalid.\n", dev->name);
1625 panic_queues(dev);
1626 }
1627 #endif
1628 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1629 /* pass FD to controller */
1630 #ifdef DEBUG
1631 lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1632 #else
1633 lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1634 #endif
1635 lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1636 lp->rfd_cur++;
1637 }
1638 if (lp->rfd_cur > lp->rfd_limit)
1639 lp->rfd_cur = lp->rfd_base;
1640 #ifdef DEBUG
1641 if (lp->rfd_cur != next_rfd)
1642 printk("rfd_cur = %p, next_rfd %p\n",
1643 lp->rfd_cur, next_rfd);
1644 #endif
1645 }
1646
1647 return received;
1648 }
1649
1650 static int tc35815_poll(struct napi_struct *napi, int budget)
1651 {
1652 struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1653 struct net_device *dev = lp->dev;
1654 struct tc35815_regs __iomem *tr =
1655 (struct tc35815_regs __iomem *)dev->base_addr;
1656 int received = 0, handled;
1657 u32 status;
1658
1659 spin_lock(&lp->rx_lock);
1660 status = tc_readl(&tr->Int_Src);
1661 do {
1662 /* BLEx, FDAEx will be cleared later */
1663 tc_writel(status & ~(Int_BLEx | Int_FDAEx),
1664 &tr->Int_Src); /* write to clear */
1665
1666 handled = tc35815_do_interrupt(dev, status, budget - received);
1667 if (status & (Int_BLEx | Int_FDAEx))
1668 tc_writel(status & (Int_BLEx | Int_FDAEx),
1669 &tr->Int_Src);
1670 if (handled >= 0) {
1671 received += handled;
1672 if (received >= budget)
1673 break;
1674 }
1675 status = tc_readl(&tr->Int_Src);
1676 } while (status);
1677 spin_unlock(&lp->rx_lock);
1678
1679 if (received < budget) {
1680 napi_complete(napi);
1681 /* enable interrupts */
1682 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1683 }
1684 return received;
1685 }
1686
1687 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1688
1689 static void
1690 tc35815_check_tx_stat(struct net_device *dev, int status)
1691 {
1692 struct tc35815_local *lp = netdev_priv(dev);
1693 const char *msg = NULL;
1694
1695 /* count collisions */
1696 if (status & Tx_ExColl)
1697 dev->stats.collisions += 16;
1698 if (status & Tx_TxColl_MASK)
1699 dev->stats.collisions += status & Tx_TxColl_MASK;
1700
1701 /* TX4939 does not have NCarr */
1702 if (lp->chiptype == TC35815_TX4939)
1703 status &= ~Tx_NCarr;
1704 /* WORKAROUND: ignore LostCrS in full duplex operation */
1705 if (!lp->link || lp->duplex == DUPLEX_FULL)
1706 status &= ~Tx_NCarr;
1707
1708 if (!(status & TX_STA_ERR)) {
1709 /* no error. */
1710 dev->stats.tx_packets++;
1711 return;
1712 }
1713
1714 dev->stats.tx_errors++;
1715 if (status & Tx_ExColl) {
1716 dev->stats.tx_aborted_errors++;
1717 msg = "Excessive Collision.";
1718 }
1719 if (status & Tx_Under) {
1720 dev->stats.tx_fifo_errors++;
1721 msg = "Tx FIFO Underrun.";
1722 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1723 lp->lstats.tx_underrun++;
1724 if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1725 struct tc35815_regs __iomem *tr =
1726 (struct tc35815_regs __iomem *)dev->base_addr;
1727 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1728 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1729 }
1730 }
1731 }
1732 if (status & Tx_Defer) {
1733 dev->stats.tx_fifo_errors++;
1734 msg = "Excessive Deferral.";
1735 }
1736 if (status & Tx_NCarr) {
1737 dev->stats.tx_carrier_errors++;
1738 msg = "Lost Carrier Sense.";
1739 }
1740 if (status & Tx_LateColl) {
1741 dev->stats.tx_aborted_errors++;
1742 msg = "Late Collision.";
1743 }
1744 if (status & Tx_TxPar) {
1745 dev->stats.tx_fifo_errors++;
1746 msg = "Transmit Parity Error.";
1747 }
1748 if (status & Tx_SQErr) {
1749 dev->stats.tx_heartbeat_errors++;
1750 msg = "Signal Quality Error.";
1751 }
1752 if (msg && netif_msg_tx_err(lp))
1753 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1754 }
1755
1756 /* This handles TX complete events posted by the device
1757 * via interrupts.
1758 */
1759 static void
1760 tc35815_txdone(struct net_device *dev)
1761 {
1762 struct tc35815_local *lp = netdev_priv(dev);
1763 struct TxFD *txfd;
1764 unsigned int fdctl;
1765
1766 txfd = &lp->tfd_base[lp->tfd_end];
1767 while (lp->tfd_start != lp->tfd_end &&
1768 !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1769 int status = le32_to_cpu(txfd->fd.FDStat);
1770 struct sk_buff *skb;
1771 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1772 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1773
1774 if (netif_msg_tx_done(lp)) {
1775 printk("%s: complete TxFD.\n", dev->name);
1776 dump_txfd(txfd);
1777 }
1778 tc35815_check_tx_stat(dev, status);
1779
1780 skb = fdsystem != 0xffffffff ?
1781 lp->tx_skbs[fdsystem].skb : NULL;
1782 #ifdef DEBUG
1783 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1784 printk("%s: tx_skbs mismatch.\n", dev->name);
1785 panic_queues(dev);
1786 }
1787 #else
1788 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1789 #endif
1790 if (skb) {
1791 dev->stats.tx_bytes += skb->len;
1792 pci_unmap_single(lp->pci_dev, lp->tx_skbs[lp->tfd_end].skb_dma, skb->len, PCI_DMA_TODEVICE);
1793 lp->tx_skbs[lp->tfd_end].skb = NULL;
1794 lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1795 dev_kfree_skb_any(skb);
1796 }
1797 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1798
1799 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1800 txfd = &lp->tfd_base[lp->tfd_end];
1801 #ifdef DEBUG
1802 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1803 printk("%s: TxFD FDNext invalid.\n", dev->name);
1804 panic_queues(dev);
1805 }
1806 #endif
1807 if (fdnext & FD_Next_EOL) {
1808 /* DMA Transmitter has been stopping... */
1809 if (lp->tfd_end != lp->tfd_start) {
1810 struct tc35815_regs __iomem *tr =
1811 (struct tc35815_regs __iomem *)dev->base_addr;
1812 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1813 struct TxFD *txhead = &lp->tfd_base[head];
1814 int qlen = (lp->tfd_start + TX_FD_NUM
1815 - lp->tfd_end) % TX_FD_NUM;
1816
1817 #ifdef DEBUG
1818 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1819 printk("%s: TxFD FDCtl invalid.\n", dev->name);
1820 panic_queues(dev);
1821 }
1822 #endif
1823 /* log max queue length */
1824 if (lp->lstats.max_tx_qlen < qlen)
1825 lp->lstats.max_tx_qlen = qlen;
1826
1827
1828 /* start DMA Transmitter again */
1829 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1830 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1831 if (netif_msg_tx_queued(lp)) {
1832 printk("%s: start TxFD on queue.\n",
1833 dev->name);
1834 dump_txfd(txfd);
1835 }
1836 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1837 }
1838 break;
1839 }
1840 }
1841
1842 /* If we had stopped the queue due to a "tx full"
1843 * condition, and space has now been made available,
1844 * wake up the queue.
1845 */
1846 if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
1847 netif_wake_queue(dev);
1848 }
1849
1850 /* The inverse routine to tc35815_open(). */
1851 static int
1852 tc35815_close(struct net_device *dev)
1853 {
1854 struct tc35815_local *lp = netdev_priv(dev);
1855
1856 netif_stop_queue(dev);
1857 napi_disable(&lp->napi);
1858 if (lp->phy_dev)
1859 phy_stop(lp->phy_dev);
1860 cancel_work_sync(&lp->restart_work);
1861
1862 /* Flush the Tx and disable Rx here. */
1863 tc35815_chip_reset(dev);
1864 free_irq(dev->irq, dev);
1865
1866 tc35815_free_queues(dev);
1867
1868 return 0;
1869
1870 }
1871
1872 /*
1873 * Get the current statistics.
1874 * This may be called with the card open or closed.
1875 */
1876 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1877 {
1878 struct tc35815_regs __iomem *tr =
1879 (struct tc35815_regs __iomem *)dev->base_addr;
1880 if (netif_running(dev))
1881 /* Update the statistics from the device registers. */
1882 dev->stats.rx_missed_errors += tc_readl(&tr->Miss_Cnt);
1883
1884 return &dev->stats;
1885 }
1886
1887 static void tc35815_set_cam_entry(struct net_device *dev, int index, unsigned char *addr)
1888 {
1889 struct tc35815_local *lp = netdev_priv(dev);
1890 struct tc35815_regs __iomem *tr =
1891 (struct tc35815_regs __iomem *)dev->base_addr;
1892 int cam_index = index * 6;
1893 u32 cam_data;
1894 u32 saved_addr;
1895
1896 saved_addr = tc_readl(&tr->CAM_Adr);
1897
1898 if (netif_msg_hw(lp))
1899 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
1900 dev->name, index, addr);
1901 if (index & 1) {
1902 /* read modify write */
1903 tc_writel(cam_index - 2, &tr->CAM_Adr);
1904 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1905 cam_data |= addr[0] << 8 | addr[1];
1906 tc_writel(cam_data, &tr->CAM_Data);
1907 /* write whole word */
1908 tc_writel(cam_index + 2, &tr->CAM_Adr);
1909 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1910 tc_writel(cam_data, &tr->CAM_Data);
1911 } else {
1912 /* write whole word */
1913 tc_writel(cam_index, &tr->CAM_Adr);
1914 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1915 tc_writel(cam_data, &tr->CAM_Data);
1916 /* read modify write */
1917 tc_writel(cam_index + 4, &tr->CAM_Adr);
1918 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1919 cam_data |= addr[4] << 24 | (addr[5] << 16);
1920 tc_writel(cam_data, &tr->CAM_Data);
1921 }
1922
1923 tc_writel(saved_addr, &tr->CAM_Adr);
1924 }
1925
1926
1927 /*
1928 * Set or clear the multicast filter for this adaptor.
1929 * num_addrs == -1 Promiscuous mode, receive all packets
1930 * num_addrs == 0 Normal mode, clear multicast list
1931 * num_addrs > 0 Multicast mode, receive normal and MC packets,
1932 * and do best-effort filtering.
1933 */
1934 static void
1935 tc35815_set_multicast_list(struct net_device *dev)
1936 {
1937 struct tc35815_regs __iomem *tr =
1938 (struct tc35815_regs __iomem *)dev->base_addr;
1939
1940 if (dev->flags & IFF_PROMISC) {
1941 /* With some (all?) 100MHalf HUB, controller will hang
1942 * if we enabled promiscuous mode before linkup... */
1943 struct tc35815_local *lp = netdev_priv(dev);
1944
1945 if (!lp->link)
1946 return;
1947 /* Enable promiscuous mode */
1948 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
1949 } else if ((dev->flags & IFF_ALLMULTI) ||
1950 netdev_mc_count(dev) > CAM_ENTRY_MAX - 3) {
1951 /* CAM 0, 1, 20 are reserved. */
1952 /* Disable promiscuous mode, use normal mode. */
1953 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
1954 } else if (!netdev_mc_empty(dev)) {
1955 struct netdev_hw_addr *ha;
1956 int i;
1957 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
1958
1959 tc_writel(0, &tr->CAM_Ctl);
1960 /* Walk the address list, and load the filter */
1961 i = 0;
1962 netdev_for_each_mc_addr(ha, dev) {
1963 /* entry 0,1 is reserved. */
1964 tc35815_set_cam_entry(dev, i + 2, ha->addr);
1965 ena_bits |= CAM_Ena_Bit(i + 2);
1966 i++;
1967 }
1968 tc_writel(ena_bits, &tr->CAM_Ena);
1969 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1970 } else {
1971 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
1972 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1973 }
1974 }
1975
1976 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1977 {
1978 struct tc35815_local *lp = netdev_priv(dev);
1979 strcpy(info->driver, MODNAME);
1980 strcpy(info->version, DRV_VERSION);
1981 strcpy(info->bus_info, pci_name(lp->pci_dev));
1982 }
1983
1984 static int tc35815_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1985 {
1986 struct tc35815_local *lp = netdev_priv(dev);
1987
1988 if (!lp->phy_dev)
1989 return -ENODEV;
1990 return phy_ethtool_gset(lp->phy_dev, cmd);
1991 }
1992
1993 static int tc35815_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1994 {
1995 struct tc35815_local *lp = netdev_priv(dev);
1996
1997 if (!lp->phy_dev)
1998 return -ENODEV;
1999 return phy_ethtool_sset(lp->phy_dev, cmd);
2000 }
2001
2002 static u32 tc35815_get_msglevel(struct net_device *dev)
2003 {
2004 struct tc35815_local *lp = netdev_priv(dev);
2005 return lp->msg_enable;
2006 }
2007
2008 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
2009 {
2010 struct tc35815_local *lp = netdev_priv(dev);
2011 lp->msg_enable = datum;
2012 }
2013
2014 static int tc35815_get_sset_count(struct net_device *dev, int sset)
2015 {
2016 struct tc35815_local *lp = netdev_priv(dev);
2017
2018 switch (sset) {
2019 case ETH_SS_STATS:
2020 return sizeof(lp->lstats) / sizeof(int);
2021 default:
2022 return -EOPNOTSUPP;
2023 }
2024 }
2025
2026 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
2027 {
2028 struct tc35815_local *lp = netdev_priv(dev);
2029 data[0] = lp->lstats.max_tx_qlen;
2030 data[1] = lp->lstats.tx_ints;
2031 data[2] = lp->lstats.rx_ints;
2032 data[3] = lp->lstats.tx_underrun;
2033 }
2034
2035 static struct {
2036 const char str[ETH_GSTRING_LEN];
2037 } ethtool_stats_keys[] = {
2038 { "max_tx_qlen" },
2039 { "tx_ints" },
2040 { "rx_ints" },
2041 { "tx_underrun" },
2042 };
2043
2044 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2045 {
2046 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2047 }
2048
2049 static const struct ethtool_ops tc35815_ethtool_ops = {
2050 .get_drvinfo = tc35815_get_drvinfo,
2051 .get_settings = tc35815_get_settings,
2052 .set_settings = tc35815_set_settings,
2053 .get_link = ethtool_op_get_link,
2054 .get_msglevel = tc35815_get_msglevel,
2055 .set_msglevel = tc35815_set_msglevel,
2056 .get_strings = tc35815_get_strings,
2057 .get_sset_count = tc35815_get_sset_count,
2058 .get_ethtool_stats = tc35815_get_ethtool_stats,
2059 };
2060
2061 static int tc35815_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2062 {
2063 struct tc35815_local *lp = netdev_priv(dev);
2064
2065 if (!netif_running(dev))
2066 return -EINVAL;
2067 if (!lp->phy_dev)
2068 return -ENODEV;
2069 return phy_mii_ioctl(lp->phy_dev, rq, cmd);
2070 }
2071
2072 static void tc35815_chip_reset(struct net_device *dev)
2073 {
2074 struct tc35815_regs __iomem *tr =
2075 (struct tc35815_regs __iomem *)dev->base_addr;
2076 int i;
2077 /* reset the controller */
2078 tc_writel(MAC_Reset, &tr->MAC_Ctl);
2079 udelay(4); /* 3200ns */
2080 i = 0;
2081 while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2082 if (i++ > 100) {
2083 printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2084 break;
2085 }
2086 mdelay(1);
2087 }
2088 tc_writel(0, &tr->MAC_Ctl);
2089
2090 /* initialize registers to default value */
2091 tc_writel(0, &tr->DMA_Ctl);
2092 tc_writel(0, &tr->TxThrsh);
2093 tc_writel(0, &tr->TxPollCtr);
2094 tc_writel(0, &tr->RxFragSize);
2095 tc_writel(0, &tr->Int_En);
2096 tc_writel(0, &tr->FDA_Bas);
2097 tc_writel(0, &tr->FDA_Lim);
2098 tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
2099 tc_writel(0, &tr->CAM_Ctl);
2100 tc_writel(0, &tr->Tx_Ctl);
2101 tc_writel(0, &tr->Rx_Ctl);
2102 tc_writel(0, &tr->CAM_Ena);
2103 (void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
2104
2105 /* initialize internal SRAM */
2106 tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2107 for (i = 0; i < 0x1000; i += 4) {
2108 tc_writel(i, &tr->CAM_Adr);
2109 tc_writel(0, &tr->CAM_Data);
2110 }
2111 tc_writel(0, &tr->DMA_Ctl);
2112 }
2113
2114 static void tc35815_chip_init(struct net_device *dev)
2115 {
2116 struct tc35815_local *lp = netdev_priv(dev);
2117 struct tc35815_regs __iomem *tr =
2118 (struct tc35815_regs __iomem *)dev->base_addr;
2119 unsigned long txctl = TX_CTL_CMD;
2120
2121 /* load station address to CAM */
2122 tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2123
2124 /* Enable CAM (broadcast and unicast) */
2125 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2126 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2127
2128 /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2129 if (HAVE_DMA_RXALIGN(lp))
2130 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2131 else
2132 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2133 tc_writel(0, &tr->TxPollCtr); /* Batch mode */
2134 tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2135 tc_writel(INT_EN_CMD, &tr->Int_En);
2136
2137 /* set queues */
2138 tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2139 tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2140 &tr->FDA_Lim);
2141 /*
2142 * Activation method:
2143 * First, enable the MAC Transmitter and the DMA Receive circuits.
2144 * Then enable the DMA Transmitter and the MAC Receive circuits.
2145 */
2146 tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
2147 tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
2148
2149 /* start MAC transmitter */
2150 /* TX4939 does not have EnLCarr */
2151 if (lp->chiptype == TC35815_TX4939)
2152 txctl &= ~Tx_EnLCarr;
2153 /* WORKAROUND: ignore LostCrS in full duplex operation */
2154 if (!lp->phy_dev || !lp->link || lp->duplex == DUPLEX_FULL)
2155 txctl &= ~Tx_EnLCarr;
2156 tc_writel(txctl, &tr->Tx_Ctl);
2157 }
2158
2159 #ifdef CONFIG_PM
2160 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2161 {
2162 struct net_device *dev = pci_get_drvdata(pdev);
2163 struct tc35815_local *lp = netdev_priv(dev);
2164 unsigned long flags;
2165
2166 pci_save_state(pdev);
2167 if (!netif_running(dev))
2168 return 0;
2169 netif_device_detach(dev);
2170 if (lp->phy_dev)
2171 phy_stop(lp->phy_dev);
2172 spin_lock_irqsave(&lp->lock, flags);
2173 tc35815_chip_reset(dev);
2174 spin_unlock_irqrestore(&lp->lock, flags);
2175 pci_set_power_state(pdev, PCI_D3hot);
2176 return 0;
2177 }
2178
2179 static int tc35815_resume(struct pci_dev *pdev)
2180 {
2181 struct net_device *dev = pci_get_drvdata(pdev);
2182 struct tc35815_local *lp = netdev_priv(dev);
2183
2184 pci_restore_state(pdev);
2185 if (!netif_running(dev))
2186 return 0;
2187 pci_set_power_state(pdev, PCI_D0);
2188 tc35815_restart(dev);
2189 netif_carrier_off(dev);
2190 if (lp->phy_dev)
2191 phy_start(lp->phy_dev);
2192 netif_device_attach(dev);
2193 return 0;
2194 }
2195 #endif /* CONFIG_PM */
2196
2197 static struct pci_driver tc35815_pci_driver = {
2198 .name = MODNAME,
2199 .id_table = tc35815_pci_tbl,
2200 .probe = tc35815_init_one,
2201 .remove = __devexit_p(tc35815_remove_one),
2202 #ifdef CONFIG_PM
2203 .suspend = tc35815_suspend,
2204 .resume = tc35815_resume,
2205 #endif
2206 };
2207
2208 module_param_named(speed, options.speed, int, 0);
2209 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2210 module_param_named(duplex, options.duplex, int, 0);
2211 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2212
2213 static int __init tc35815_init_module(void)
2214 {
2215 return pci_register_driver(&tc35815_pci_driver);
2216 }
2217
2218 static void __exit tc35815_cleanup_module(void)
2219 {
2220 pci_unregister_driver(&tc35815_pci_driver);
2221 }
2222
2223 module_init(tc35815_init_module);
2224 module_exit(tc35815_cleanup_module);
2225
2226 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2227 MODULE_LICENSE("GPL");