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/netdevice.h>
42 #include <linux/etherdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/delay.h>
45 #include <linux/pci.h>
46 #include <linux/phy.h>
47 #include <linux/workqueue.h>
48 #include <linux/platform_device.h>
49 #include <linux/prefetch.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[] = {
63 { "TOSHIBA TC35815CF 10/100BaseTX" },
64 { "TOSHIBA TC35815 with Wake on LAN" },
65 { "TOSHIBA TC35815/TX4939" },
66 };
67
68 static const struct pci_device_id 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 descriptor */
284 struct FDesc {
285 volatile __u32 FDNext;
286 volatile __u32 FDSystem;
287 volatile __u32 FDStat;
288 volatile __u32 FDCtl;
289 };
290
291 /* Buffer descriptor */
292 struct BDesc {
293 volatile __u32 BuffData;
294 volatile __u32 BDCtl;
295 };
296
297 #define FD_ALIGN 16
298
299 /* Frame Descriptor 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 Descriptor 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[]; /* 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 int duplex;
409 int speed;
410 int link;
411 struct work_struct restart_work;
412
413 /*
414 * Transmitting: Batch Mode.
415 * 1 BD in 1 TxFD.
416 * Receiving: Non-Packing Mode.
417 * 1 circular FD for Free Buffer List.
418 * RX_BUF_NUM BD in Free Buffer FD.
419 * One Free Buffer BD has ETH_FRAME_LEN data buffer.
420 */
421 void *fd_buf; /* for TxFD, RxFD, FrFD */
422 dma_addr_t fd_buf_dma;
423 struct TxFD *tfd_base;
424 unsigned int tfd_start;
425 unsigned int tfd_end;
426 struct RxFD *rfd_base;
427 struct RxFD *rfd_limit;
428 struct RxFD *rfd_cur;
429 struct FrFD *fbl_ptr;
430 unsigned int fbl_count;
431 struct {
432 struct sk_buff *skb;
433 dma_addr_t skb_dma;
434 } tx_skbs[TX_FD_NUM], rx_skbs[RX_BUF_NUM];
435 u32 msg_enable;
436 enum tc35815_chiptype chiptype;
437 };
438
fd_virt_to_bus(struct tc35815_local * lp,void * virt)439 static inline dma_addr_t fd_virt_to_bus(struct tc35815_local *lp, void *virt)
440 {
441 return lp->fd_buf_dma + ((u8 *)virt - (u8 *)lp->fd_buf);
442 }
443 #ifdef DEBUG
fd_bus_to_virt(struct tc35815_local * lp,dma_addr_t bus)444 static inline void *fd_bus_to_virt(struct tc35815_local *lp, dma_addr_t bus)
445 {
446 return (void *)((u8 *)lp->fd_buf + (bus - lp->fd_buf_dma));
447 }
448 #endif
alloc_rxbuf_skb(struct net_device * dev,struct pci_dev * hwdev,dma_addr_t * dma_handle)449 static struct sk_buff *alloc_rxbuf_skb(struct net_device *dev,
450 struct pci_dev *hwdev,
451 dma_addr_t *dma_handle)
452 {
453 struct sk_buff *skb;
454 skb = netdev_alloc_skb(dev, RX_BUF_SIZE);
455 if (!skb)
456 return NULL;
457 *dma_handle = dma_map_single(&hwdev->dev, skb->data, RX_BUF_SIZE,
458 DMA_FROM_DEVICE);
459 if (dma_mapping_error(&hwdev->dev, *dma_handle)) {
460 dev_kfree_skb_any(skb);
461 return NULL;
462 }
463 skb_reserve(skb, 2); /* make IP header 4byte aligned */
464 return skb;
465 }
466
free_rxbuf_skb(struct pci_dev * hwdev,struct sk_buff * skb,dma_addr_t dma_handle)467 static void free_rxbuf_skb(struct pci_dev *hwdev, struct sk_buff *skb, dma_addr_t dma_handle)
468 {
469 dma_unmap_single(&hwdev->dev, dma_handle, RX_BUF_SIZE,
470 DMA_FROM_DEVICE);
471 dev_kfree_skb_any(skb);
472 }
473
474 /* Index to functions, as function prototypes. */
475
476 static int tc35815_open(struct net_device *dev);
477 static netdev_tx_t tc35815_send_packet(struct sk_buff *skb,
478 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, unsigned int txqueue);
487 #ifdef CONFIG_NET_POLL_CONTROLLER
488 static void tc35815_poll_controller(struct net_device *dev);
489 #endif
490 static const struct ethtool_ops tc35815_ethtool_ops;
491
492 /* Example routines you must write ;->. */
493 static void tc35815_chip_reset(struct net_device *dev);
494 static void tc35815_chip_init(struct net_device *dev);
495
496 #ifdef DEBUG
497 static void panic_queues(struct net_device *dev);
498 #endif
499
500 static void tc35815_restart_work(struct work_struct *work);
501
tc_mdio_read(struct mii_bus * bus,int mii_id,int regnum)502 static int tc_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
503 {
504 struct net_device *dev = bus->priv;
505 struct tc35815_regs __iomem *tr =
506 (struct tc35815_regs __iomem *)dev->base_addr;
507 unsigned long timeout = jiffies + HZ;
508
509 tc_writel(MD_CA_Busy | (mii_id << 5) | (regnum & 0x1f), &tr->MD_CA);
510 udelay(12); /* it takes 32 x 400ns at least */
511 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
512 if (time_after(jiffies, timeout))
513 return -EIO;
514 cpu_relax();
515 }
516 return tc_readl(&tr->MD_Data) & 0xffff;
517 }
518
tc_mdio_write(struct mii_bus * bus,int mii_id,int regnum,u16 val)519 static int tc_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 val)
520 {
521 struct net_device *dev = bus->priv;
522 struct tc35815_regs __iomem *tr =
523 (struct tc35815_regs __iomem *)dev->base_addr;
524 unsigned long timeout = jiffies + HZ;
525
526 tc_writel(val, &tr->MD_Data);
527 tc_writel(MD_CA_Busy | MD_CA_Wr | (mii_id << 5) | (regnum & 0x1f),
528 &tr->MD_CA);
529 udelay(12); /* it takes 32 x 400ns at least */
530 while (tc_readl(&tr->MD_CA) & MD_CA_Busy) {
531 if (time_after(jiffies, timeout))
532 return -EIO;
533 cpu_relax();
534 }
535 return 0;
536 }
537
tc_handle_link_change(struct net_device * dev)538 static void tc_handle_link_change(struct net_device *dev)
539 {
540 struct tc35815_local *lp = netdev_priv(dev);
541 struct phy_device *phydev = dev->phydev;
542 unsigned long flags;
543 int status_change = 0;
544
545 spin_lock_irqsave(&lp->lock, flags);
546 if (phydev->link &&
547 (lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
548 struct tc35815_regs __iomem *tr =
549 (struct tc35815_regs __iomem *)dev->base_addr;
550 u32 reg;
551
552 reg = tc_readl(&tr->MAC_Ctl);
553 reg |= MAC_HaltReq;
554 tc_writel(reg, &tr->MAC_Ctl);
555 if (phydev->duplex == DUPLEX_FULL)
556 reg |= MAC_FullDup;
557 else
558 reg &= ~MAC_FullDup;
559 tc_writel(reg, &tr->MAC_Ctl);
560 reg &= ~MAC_HaltReq;
561 tc_writel(reg, &tr->MAC_Ctl);
562
563 /*
564 * TX4939 PCFG.SPEEDn bit will be changed on
565 * NETDEV_CHANGE event.
566 */
567 /*
568 * WORKAROUND: enable LostCrS only if half duplex
569 * operation.
570 * (TX4939 does not have EnLCarr)
571 */
572 if (phydev->duplex == DUPLEX_HALF &&
573 lp->chiptype != TC35815_TX4939)
574 tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
575 &tr->Tx_Ctl);
576
577 lp->speed = phydev->speed;
578 lp->duplex = phydev->duplex;
579 status_change = 1;
580 }
581
582 if (phydev->link != lp->link) {
583 if (phydev->link) {
584 /* delayed promiscuous enabling */
585 if (dev->flags & IFF_PROMISC)
586 tc35815_set_multicast_list(dev);
587 } else {
588 lp->speed = 0;
589 lp->duplex = -1;
590 }
591 lp->link = phydev->link;
592
593 status_change = 1;
594 }
595 spin_unlock_irqrestore(&lp->lock, flags);
596
597 if (status_change && netif_msg_link(lp)) {
598 phy_print_status(phydev);
599 pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
600 dev->name,
601 phy_read(phydev, MII_BMCR),
602 phy_read(phydev, MII_BMSR),
603 phy_read(phydev, MII_LPA));
604 }
605 }
606
tc_mii_probe(struct net_device * dev)607 static int tc_mii_probe(struct net_device *dev)
608 {
609 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
610 struct tc35815_local *lp = netdev_priv(dev);
611 struct phy_device *phydev;
612
613 phydev = phy_find_first(lp->mii_bus);
614 if (!phydev) {
615 printk(KERN_ERR "%s: no PHY found\n", dev->name);
616 return -ENODEV;
617 }
618
619 /* attach the mac to the phy */
620 phydev = phy_connect(dev, phydev_name(phydev),
621 &tc_handle_link_change,
622 lp->chiptype == TC35815_TX4939 ? PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII);
623 if (IS_ERR(phydev)) {
624 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
625 return PTR_ERR(phydev);
626 }
627
628 phy_attached_info(phydev);
629
630 /* mask with MAC supported features */
631 phy_set_max_speed(phydev, SPEED_100);
632 if (options.speed == 10) {
633 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);
634 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
635 } else if (options.speed == 100) {
636 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, mask);
637 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, mask);
638 }
639 if (options.duplex == 1) {
640 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, mask);
641 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
642 } else if (options.duplex == 2) {
643 linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, mask);
644 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);
645 }
646 linkmode_andnot(phydev->supported, phydev->supported, mask);
647 linkmode_copy(phydev->advertising, phydev->supported);
648
649 lp->link = 0;
650 lp->speed = 0;
651 lp->duplex = -1;
652
653 return 0;
654 }
655
tc_mii_init(struct net_device * dev)656 static int tc_mii_init(struct net_device *dev)
657 {
658 struct tc35815_local *lp = netdev_priv(dev);
659 int err;
660
661 lp->mii_bus = mdiobus_alloc();
662 if (lp->mii_bus == NULL) {
663 err = -ENOMEM;
664 goto err_out;
665 }
666
667 lp->mii_bus->name = "tc35815_mii_bus";
668 lp->mii_bus->read = tc_mdio_read;
669 lp->mii_bus->write = tc_mdio_write;
670 snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x", pci_dev_id(lp->pci_dev));
671 lp->mii_bus->priv = dev;
672 lp->mii_bus->parent = &lp->pci_dev->dev;
673 err = mdiobus_register(lp->mii_bus);
674 if (err)
675 goto err_out_free_mii_bus;
676 err = tc_mii_probe(dev);
677 if (err)
678 goto err_out_unregister_bus;
679 return 0;
680
681 err_out_unregister_bus:
682 mdiobus_unregister(lp->mii_bus);
683 err_out_free_mii_bus:
684 mdiobus_free(lp->mii_bus);
685 err_out:
686 return err;
687 }
688
689 #ifdef CONFIG_CPU_TX49XX
690 /*
691 * Find a platform_device providing a MAC address. The platform code
692 * should provide a "tc35815-mac" device with a MAC address in its
693 * platform_data.
694 */
tc35815_mac_match(struct device * dev,const void * data)695 static int tc35815_mac_match(struct device *dev, const void *data)
696 {
697 struct platform_device *plat_dev = to_platform_device(dev);
698 const struct pci_dev *pci_dev = data;
699 unsigned int id = pci_dev->irq;
700 return !strcmp(plat_dev->name, "tc35815-mac") && plat_dev->id == id;
701 }
702
tc35815_read_plat_dev_addr(struct net_device * dev)703 static int tc35815_read_plat_dev_addr(struct net_device *dev)
704 {
705 struct tc35815_local *lp = netdev_priv(dev);
706 struct device *pd = bus_find_device(&platform_bus_type, NULL,
707 lp->pci_dev, tc35815_mac_match);
708 if (pd) {
709 if (pd->platform_data)
710 eth_hw_addr_set(dev, pd->platform_data);
711 put_device(pd);
712 return is_valid_ether_addr(dev->dev_addr) ? 0 : -ENODEV;
713 }
714 return -ENODEV;
715 }
716 #else
tc35815_read_plat_dev_addr(struct net_device * dev)717 static int tc35815_read_plat_dev_addr(struct net_device *dev)
718 {
719 return -ENODEV;
720 }
721 #endif
722
tc35815_init_dev_addr(struct net_device * dev)723 static int tc35815_init_dev_addr(struct net_device *dev)
724 {
725 struct tc35815_regs __iomem *tr =
726 (struct tc35815_regs __iomem *)dev->base_addr;
727 u8 addr[ETH_ALEN];
728 int i;
729
730 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
731 ;
732 for (i = 0; i < 6; i += 2) {
733 unsigned short data;
734 tc_writel(PROM_Busy | PROM_Read | (i / 2 + 2), &tr->PROM_Ctl);
735 while (tc_readl(&tr->PROM_Ctl) & PROM_Busy)
736 ;
737 data = tc_readl(&tr->PROM_Data);
738 addr[i] = data & 0xff;
739 addr[i+1] = data >> 8;
740 }
741 eth_hw_addr_set(dev, addr);
742 if (!is_valid_ether_addr(dev->dev_addr))
743 return tc35815_read_plat_dev_addr(dev);
744 return 0;
745 }
746
747 static const struct net_device_ops tc35815_netdev_ops = {
748 .ndo_open = tc35815_open,
749 .ndo_stop = tc35815_close,
750 .ndo_start_xmit = tc35815_send_packet,
751 .ndo_get_stats = tc35815_get_stats,
752 .ndo_set_rx_mode = tc35815_set_multicast_list,
753 .ndo_tx_timeout = tc35815_tx_timeout,
754 .ndo_eth_ioctl = phy_do_ioctl_running,
755 .ndo_validate_addr = eth_validate_addr,
756 .ndo_set_mac_address = eth_mac_addr,
757 #ifdef CONFIG_NET_POLL_CONTROLLER
758 .ndo_poll_controller = tc35815_poll_controller,
759 #endif
760 };
761
tc35815_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)762 static int tc35815_init_one(struct pci_dev *pdev,
763 const struct pci_device_id *ent)
764 {
765 void __iomem *ioaddr = NULL;
766 struct net_device *dev;
767 struct tc35815_local *lp;
768 int rc;
769
770 static int printed_version;
771 if (!printed_version++) {
772 printk(version);
773 dev_printk(KERN_DEBUG, &pdev->dev,
774 "speed:%d duplex:%d\n",
775 options.speed, options.duplex);
776 }
777
778 if (!pdev->irq) {
779 dev_warn(&pdev->dev, "no IRQ assigned.\n");
780 return -ENODEV;
781 }
782
783 /* dev zeroed in alloc_etherdev */
784 dev = alloc_etherdev(sizeof(*lp));
785 if (dev == NULL)
786 return -ENOMEM;
787
788 SET_NETDEV_DEV(dev, &pdev->dev);
789 lp = netdev_priv(dev);
790 lp->dev = dev;
791
792 /* enable device (incl. PCI PM wakeup), and bus-mastering */
793 rc = pcim_enable_device(pdev);
794 if (rc)
795 goto err_out;
796 rc = pcim_iomap_regions(pdev, 1 << 1, MODNAME);
797 if (rc)
798 goto err_out;
799 pci_set_master(pdev);
800 ioaddr = pcim_iomap_table(pdev)[1];
801
802 /* Initialize the device structure. */
803 dev->netdev_ops = &tc35815_netdev_ops;
804 dev->ethtool_ops = &tc35815_ethtool_ops;
805 dev->watchdog_timeo = TC35815_TX_TIMEOUT;
806 netif_napi_add_weight(dev, &lp->napi, tc35815_poll, NAPI_WEIGHT);
807
808 dev->irq = pdev->irq;
809 dev->base_addr = (unsigned long)ioaddr;
810
811 INIT_WORK(&lp->restart_work, tc35815_restart_work);
812 spin_lock_init(&lp->lock);
813 spin_lock_init(&lp->rx_lock);
814 lp->pci_dev = pdev;
815 lp->chiptype = ent->driver_data;
816
817 lp->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK;
818 pci_set_drvdata(pdev, dev);
819
820 /* Soft reset the chip. */
821 tc35815_chip_reset(dev);
822
823 /* Retrieve the ethernet address. */
824 if (tc35815_init_dev_addr(dev)) {
825 dev_warn(&pdev->dev, "not valid ether addr\n");
826 eth_hw_addr_random(dev);
827 }
828
829 rc = register_netdev(dev);
830 if (rc)
831 goto err_out;
832
833 printk(KERN_INFO "%s: %s at 0x%lx, %pM, IRQ %d\n",
834 dev->name,
835 chip_info[ent->driver_data].name,
836 dev->base_addr,
837 dev->dev_addr,
838 dev->irq);
839
840 rc = tc_mii_init(dev);
841 if (rc)
842 goto err_out_unregister;
843
844 return 0;
845
846 err_out_unregister:
847 unregister_netdev(dev);
848 err_out:
849 free_netdev(dev);
850 return rc;
851 }
852
853
tc35815_remove_one(struct pci_dev * pdev)854 static void tc35815_remove_one(struct pci_dev *pdev)
855 {
856 struct net_device *dev = pci_get_drvdata(pdev);
857 struct tc35815_local *lp = netdev_priv(dev);
858
859 phy_disconnect(dev->phydev);
860 mdiobus_unregister(lp->mii_bus);
861 mdiobus_free(lp->mii_bus);
862 unregister_netdev(dev);
863 free_netdev(dev);
864 }
865
866 static int
tc35815_init_queues(struct net_device * dev)867 tc35815_init_queues(struct net_device *dev)
868 {
869 struct tc35815_local *lp = netdev_priv(dev);
870 int i;
871 unsigned long fd_addr;
872
873 if (!lp->fd_buf) {
874 BUG_ON(sizeof(struct FDesc) +
875 sizeof(struct BDesc) * RX_BUF_NUM +
876 sizeof(struct FDesc) * RX_FD_NUM +
877 sizeof(struct TxFD) * TX_FD_NUM >
878 PAGE_SIZE * FD_PAGE_NUM);
879
880 lp->fd_buf = dma_alloc_coherent(&lp->pci_dev->dev,
881 PAGE_SIZE * FD_PAGE_NUM,
882 &lp->fd_buf_dma, GFP_ATOMIC);
883 if (!lp->fd_buf)
884 return -ENOMEM;
885 for (i = 0; i < RX_BUF_NUM; i++) {
886 lp->rx_skbs[i].skb =
887 alloc_rxbuf_skb(dev, lp->pci_dev,
888 &lp->rx_skbs[i].skb_dma);
889 if (!lp->rx_skbs[i].skb) {
890 while (--i >= 0) {
891 free_rxbuf_skb(lp->pci_dev,
892 lp->rx_skbs[i].skb,
893 lp->rx_skbs[i].skb_dma);
894 lp->rx_skbs[i].skb = NULL;
895 }
896 dma_free_coherent(&lp->pci_dev->dev,
897 PAGE_SIZE * FD_PAGE_NUM,
898 lp->fd_buf, lp->fd_buf_dma);
899 lp->fd_buf = NULL;
900 return -ENOMEM;
901 }
902 }
903 printk(KERN_DEBUG "%s: FD buf %p DataBuf",
904 dev->name, lp->fd_buf);
905 printk("\n");
906 } else {
907 for (i = 0; i < FD_PAGE_NUM; i++)
908 clear_page((void *)((unsigned long)lp->fd_buf +
909 i * PAGE_SIZE));
910 }
911 fd_addr = (unsigned long)lp->fd_buf;
912
913 /* Free Descriptors (for Receive) */
914 lp->rfd_base = (struct RxFD *)fd_addr;
915 fd_addr += sizeof(struct RxFD) * RX_FD_NUM;
916 for (i = 0; i < RX_FD_NUM; i++)
917 lp->rfd_base[i].fd.FDCtl = cpu_to_le32(FD_CownsFD);
918 lp->rfd_cur = lp->rfd_base;
919 lp->rfd_limit = (struct RxFD *)fd_addr - (RX_FD_RESERVE + 1);
920
921 /* Transmit Descriptors */
922 lp->tfd_base = (struct TxFD *)fd_addr;
923 fd_addr += sizeof(struct TxFD) * TX_FD_NUM;
924 for (i = 0; i < TX_FD_NUM; i++) {
925 lp->tfd_base[i].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[i+1]));
926 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
927 lp->tfd_base[i].fd.FDCtl = cpu_to_le32(0);
928 }
929 lp->tfd_base[TX_FD_NUM-1].fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, &lp->tfd_base[0]));
930 lp->tfd_start = 0;
931 lp->tfd_end = 0;
932
933 /* Buffer List (for Receive) */
934 lp->fbl_ptr = (struct FrFD *)fd_addr;
935 lp->fbl_ptr->fd.FDNext = cpu_to_le32(fd_virt_to_bus(lp, lp->fbl_ptr));
936 lp->fbl_ptr->fd.FDCtl = cpu_to_le32(RX_BUF_NUM | FD_CownsFD);
937 /*
938 * move all allocated skbs to head of rx_skbs[] array.
939 * fbl_count mighe not be RX_BUF_NUM if alloc_rxbuf_skb() in
940 * tc35815_rx() had failed.
941 */
942 lp->fbl_count = 0;
943 for (i = 0; i < RX_BUF_NUM; i++) {
944 if (lp->rx_skbs[i].skb) {
945 if (i != lp->fbl_count) {
946 lp->rx_skbs[lp->fbl_count].skb =
947 lp->rx_skbs[i].skb;
948 lp->rx_skbs[lp->fbl_count].skb_dma =
949 lp->rx_skbs[i].skb_dma;
950 }
951 lp->fbl_count++;
952 }
953 }
954 for (i = 0; i < RX_BUF_NUM; i++) {
955 if (i >= lp->fbl_count) {
956 lp->fbl_ptr->bd[i].BuffData = 0;
957 lp->fbl_ptr->bd[i].BDCtl = 0;
958 continue;
959 }
960 lp->fbl_ptr->bd[i].BuffData =
961 cpu_to_le32(lp->rx_skbs[i].skb_dma);
962 /* BDID is index of FrFD.bd[] */
963 lp->fbl_ptr->bd[i].BDCtl =
964 cpu_to_le32(BD_CownsBD | (i << BD_RxBDID_SHIFT) |
965 RX_BUF_SIZE);
966 }
967
968 printk(KERN_DEBUG "%s: TxFD %p RxFD %p FrFD %p\n",
969 dev->name, lp->tfd_base, lp->rfd_base, lp->fbl_ptr);
970 return 0;
971 }
972
973 static void
tc35815_clear_queues(struct net_device * dev)974 tc35815_clear_queues(struct net_device *dev)
975 {
976 struct tc35815_local *lp = netdev_priv(dev);
977 int i;
978
979 for (i = 0; i < TX_FD_NUM; i++) {
980 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
981 struct sk_buff *skb =
982 fdsystem != 0xffffffff ?
983 lp->tx_skbs[fdsystem].skb : NULL;
984 #ifdef DEBUG
985 if (lp->tx_skbs[i].skb != skb) {
986 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
987 panic_queues(dev);
988 }
989 #else
990 BUG_ON(lp->tx_skbs[i].skb != skb);
991 #endif
992 if (skb) {
993 dma_unmap_single(&lp->pci_dev->dev,
994 lp->tx_skbs[i].skb_dma, skb->len,
995 DMA_TO_DEVICE);
996 lp->tx_skbs[i].skb = NULL;
997 lp->tx_skbs[i].skb_dma = 0;
998 dev_kfree_skb_any(skb);
999 }
1000 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1001 }
1002
1003 tc35815_init_queues(dev);
1004 }
1005
1006 static void
tc35815_free_queues(struct net_device * dev)1007 tc35815_free_queues(struct net_device *dev)
1008 {
1009 struct tc35815_local *lp = netdev_priv(dev);
1010 int i;
1011
1012 if (lp->tfd_base) {
1013 for (i = 0; i < TX_FD_NUM; i++) {
1014 u32 fdsystem = le32_to_cpu(lp->tfd_base[i].fd.FDSystem);
1015 struct sk_buff *skb =
1016 fdsystem != 0xffffffff ?
1017 lp->tx_skbs[fdsystem].skb : NULL;
1018 #ifdef DEBUG
1019 if (lp->tx_skbs[i].skb != skb) {
1020 printk("%s: tx_skbs mismatch(%d).\n", dev->name, i);
1021 panic_queues(dev);
1022 }
1023 #else
1024 BUG_ON(lp->tx_skbs[i].skb != skb);
1025 #endif
1026 if (skb) {
1027 dma_unmap_single(&lp->pci_dev->dev,
1028 lp->tx_skbs[i].skb_dma,
1029 skb->len, DMA_TO_DEVICE);
1030 dev_kfree_skb(skb);
1031 lp->tx_skbs[i].skb = NULL;
1032 lp->tx_skbs[i].skb_dma = 0;
1033 }
1034 lp->tfd_base[i].fd.FDSystem = cpu_to_le32(0xffffffff);
1035 }
1036 }
1037
1038 lp->rfd_base = NULL;
1039 lp->rfd_limit = NULL;
1040 lp->rfd_cur = NULL;
1041 lp->fbl_ptr = NULL;
1042
1043 for (i = 0; i < RX_BUF_NUM; i++) {
1044 if (lp->rx_skbs[i].skb) {
1045 free_rxbuf_skb(lp->pci_dev, lp->rx_skbs[i].skb,
1046 lp->rx_skbs[i].skb_dma);
1047 lp->rx_skbs[i].skb = NULL;
1048 }
1049 }
1050 if (lp->fd_buf) {
1051 dma_free_coherent(&lp->pci_dev->dev, PAGE_SIZE * FD_PAGE_NUM,
1052 lp->fd_buf, lp->fd_buf_dma);
1053 lp->fd_buf = NULL;
1054 }
1055 }
1056
1057 static void
dump_txfd(struct TxFD * fd)1058 dump_txfd(struct TxFD *fd)
1059 {
1060 printk("TxFD(%p): %08x %08x %08x %08x\n", fd,
1061 le32_to_cpu(fd->fd.FDNext),
1062 le32_to_cpu(fd->fd.FDSystem),
1063 le32_to_cpu(fd->fd.FDStat),
1064 le32_to_cpu(fd->fd.FDCtl));
1065 printk("BD: ");
1066 printk(" %08x %08x",
1067 le32_to_cpu(fd->bd.BuffData),
1068 le32_to_cpu(fd->bd.BDCtl));
1069 printk("\n");
1070 }
1071
1072 static int
dump_rxfd(struct RxFD * fd)1073 dump_rxfd(struct RxFD *fd)
1074 {
1075 int i, bd_count = (le32_to_cpu(fd->fd.FDCtl) & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1076 if (bd_count > 8)
1077 bd_count = 8;
1078 printk("RxFD(%p): %08x %08x %08x %08x\n", fd,
1079 le32_to_cpu(fd->fd.FDNext),
1080 le32_to_cpu(fd->fd.FDSystem),
1081 le32_to_cpu(fd->fd.FDStat),
1082 le32_to_cpu(fd->fd.FDCtl));
1083 if (le32_to_cpu(fd->fd.FDCtl) & FD_CownsFD)
1084 return 0;
1085 printk("BD: ");
1086 for (i = 0; i < bd_count; i++)
1087 printk(" %08x %08x",
1088 le32_to_cpu(fd->bd[i].BuffData),
1089 le32_to_cpu(fd->bd[i].BDCtl));
1090 printk("\n");
1091 return bd_count;
1092 }
1093
1094 #ifdef DEBUG
1095 static void
dump_frfd(struct FrFD * fd)1096 dump_frfd(struct FrFD *fd)
1097 {
1098 int i;
1099 printk("FrFD(%p): %08x %08x %08x %08x\n", fd,
1100 le32_to_cpu(fd->fd.FDNext),
1101 le32_to_cpu(fd->fd.FDSystem),
1102 le32_to_cpu(fd->fd.FDStat),
1103 le32_to_cpu(fd->fd.FDCtl));
1104 printk("BD: ");
1105 for (i = 0; i < RX_BUF_NUM; i++)
1106 printk(" %08x %08x",
1107 le32_to_cpu(fd->bd[i].BuffData),
1108 le32_to_cpu(fd->bd[i].BDCtl));
1109 printk("\n");
1110 }
1111
1112 static void
panic_queues(struct net_device * dev)1113 panic_queues(struct net_device *dev)
1114 {
1115 struct tc35815_local *lp = netdev_priv(dev);
1116 int i;
1117
1118 printk("TxFD base %p, start %u, end %u\n",
1119 lp->tfd_base, lp->tfd_start, lp->tfd_end);
1120 printk("RxFD base %p limit %p cur %p\n",
1121 lp->rfd_base, lp->rfd_limit, lp->rfd_cur);
1122 printk("FrFD %p\n", lp->fbl_ptr);
1123 for (i = 0; i < TX_FD_NUM; i++)
1124 dump_txfd(&lp->tfd_base[i]);
1125 for (i = 0; i < RX_FD_NUM; i++) {
1126 int bd_count = dump_rxfd(&lp->rfd_base[i]);
1127 i += (bd_count + 1) / 2; /* skip BDs */
1128 }
1129 dump_frfd(lp->fbl_ptr);
1130 panic("%s: Illegal queue state.", dev->name);
1131 }
1132 #endif
1133
print_eth(const u8 * add)1134 static void print_eth(const u8 *add)
1135 {
1136 printk(KERN_DEBUG "print_eth(%p)\n", add);
1137 printk(KERN_DEBUG " %pM => %pM : %02x%02x\n",
1138 add + 6, add, add[12], add[13]);
1139 }
1140
tc35815_tx_full(struct net_device * dev)1141 static int tc35815_tx_full(struct net_device *dev)
1142 {
1143 struct tc35815_local *lp = netdev_priv(dev);
1144 return (lp->tfd_start + 1) % TX_FD_NUM == lp->tfd_end;
1145 }
1146
tc35815_restart(struct net_device * dev)1147 static void tc35815_restart(struct net_device *dev)
1148 {
1149 struct tc35815_local *lp = netdev_priv(dev);
1150 int ret;
1151
1152 if (dev->phydev) {
1153 ret = phy_init_hw(dev->phydev);
1154 if (ret)
1155 printk(KERN_ERR "%s: PHY init failed.\n", dev->name);
1156 }
1157
1158 spin_lock_bh(&lp->rx_lock);
1159 spin_lock_irq(&lp->lock);
1160 tc35815_chip_reset(dev);
1161 tc35815_clear_queues(dev);
1162 tc35815_chip_init(dev);
1163 /* Reconfigure CAM again since tc35815_chip_init() initialize it. */
1164 tc35815_set_multicast_list(dev);
1165 spin_unlock_irq(&lp->lock);
1166 spin_unlock_bh(&lp->rx_lock);
1167
1168 netif_wake_queue(dev);
1169 }
1170
tc35815_restart_work(struct work_struct * work)1171 static void tc35815_restart_work(struct work_struct *work)
1172 {
1173 struct tc35815_local *lp =
1174 container_of(work, struct tc35815_local, restart_work);
1175 struct net_device *dev = lp->dev;
1176
1177 tc35815_restart(dev);
1178 }
1179
tc35815_schedule_restart(struct net_device * dev)1180 static void tc35815_schedule_restart(struct net_device *dev)
1181 {
1182 struct tc35815_local *lp = netdev_priv(dev);
1183 struct tc35815_regs __iomem *tr =
1184 (struct tc35815_regs __iomem *)dev->base_addr;
1185 unsigned long flags;
1186
1187 /* disable interrupts */
1188 spin_lock_irqsave(&lp->lock, flags);
1189 tc_writel(0, &tr->Int_En);
1190 tc_writel(tc_readl(&tr->DMA_Ctl) | DMA_IntMask, &tr->DMA_Ctl);
1191 schedule_work(&lp->restart_work);
1192 spin_unlock_irqrestore(&lp->lock, flags);
1193 }
1194
tc35815_tx_timeout(struct net_device * dev,unsigned int txqueue)1195 static void tc35815_tx_timeout(struct net_device *dev, unsigned int txqueue)
1196 {
1197 struct tc35815_regs __iomem *tr =
1198 (struct tc35815_regs __iomem *)dev->base_addr;
1199
1200 printk(KERN_WARNING "%s: transmit timed out, status %#x\n",
1201 dev->name, tc_readl(&tr->Tx_Stat));
1202
1203 /* Try to restart the adaptor. */
1204 tc35815_schedule_restart(dev);
1205 dev->stats.tx_errors++;
1206 }
1207
1208 /*
1209 * Open/initialize the controller. This is called (in the current kernel)
1210 * sometime after booting when the 'ifconfig' program is run.
1211 *
1212 * This routine should set everything up anew at each open, even
1213 * registers that "should" only need to be set once at boot, so that
1214 * there is non-reboot way to recover if something goes wrong.
1215 */
1216 static int
tc35815_open(struct net_device * dev)1217 tc35815_open(struct net_device *dev)
1218 {
1219 struct tc35815_local *lp = netdev_priv(dev);
1220
1221 /*
1222 * This is used if the interrupt line can turned off (shared).
1223 * See 3c503.c for an example of selecting the IRQ at config-time.
1224 */
1225 if (request_irq(dev->irq, tc35815_interrupt, IRQF_SHARED,
1226 dev->name, dev))
1227 return -EAGAIN;
1228
1229 tc35815_chip_reset(dev);
1230
1231 if (tc35815_init_queues(dev) != 0) {
1232 free_irq(dev->irq, dev);
1233 return -EAGAIN;
1234 }
1235
1236 napi_enable(&lp->napi);
1237
1238 /* Reset the hardware here. Don't forget to set the station address. */
1239 spin_lock_irq(&lp->lock);
1240 tc35815_chip_init(dev);
1241 spin_unlock_irq(&lp->lock);
1242
1243 netif_carrier_off(dev);
1244 /* schedule a link state check */
1245 phy_start(dev->phydev);
1246
1247 /* We are now ready to accept transmit requeusts from
1248 * the queueing layer of the networking.
1249 */
1250 netif_start_queue(dev);
1251
1252 return 0;
1253 }
1254
1255 /* This will only be invoked if your driver is _not_ in XOFF state.
1256 * What this means is that you need not check it, and that this
1257 * invariant will hold if you make sure that the netif_*_queue()
1258 * calls are done at the proper times.
1259 */
1260 static netdev_tx_t
tc35815_send_packet(struct sk_buff * skb,struct net_device * dev)1261 tc35815_send_packet(struct sk_buff *skb, struct net_device *dev)
1262 {
1263 struct tc35815_local *lp = netdev_priv(dev);
1264 struct TxFD *txfd;
1265 unsigned long flags;
1266
1267 /* If some error occurs while trying to transmit this
1268 * packet, you should return '1' from this function.
1269 * In such a case you _may not_ do anything to the
1270 * SKB, it is still owned by the network queueing
1271 * layer when an error is returned. This means you
1272 * may not modify any SKB fields, you may not free
1273 * the SKB, etc.
1274 */
1275
1276 /* This is the most common case for modern hardware.
1277 * The spinlock protects this code from the TX complete
1278 * hardware interrupt handler. Queue flow control is
1279 * thus managed under this lock as well.
1280 */
1281 spin_lock_irqsave(&lp->lock, flags);
1282
1283 /* failsafe... (handle txdone now if half of FDs are used) */
1284 if ((lp->tfd_start + TX_FD_NUM - lp->tfd_end) % TX_FD_NUM >
1285 TX_FD_NUM / 2)
1286 tc35815_txdone(dev);
1287
1288 if (netif_msg_pktdata(lp))
1289 print_eth(skb->data);
1290 #ifdef DEBUG
1291 if (lp->tx_skbs[lp->tfd_start].skb) {
1292 printk("%s: tx_skbs conflict.\n", dev->name);
1293 panic_queues(dev);
1294 }
1295 #else
1296 BUG_ON(lp->tx_skbs[lp->tfd_start].skb);
1297 #endif
1298 lp->tx_skbs[lp->tfd_start].skb = skb;
1299 lp->tx_skbs[lp->tfd_start].skb_dma = dma_map_single(&lp->pci_dev->dev,
1300 skb->data,
1301 skb->len,
1302 DMA_TO_DEVICE);
1303
1304 /*add to ring */
1305 txfd = &lp->tfd_base[lp->tfd_start];
1306 txfd->bd.BuffData = cpu_to_le32(lp->tx_skbs[lp->tfd_start].skb_dma);
1307 txfd->bd.BDCtl = cpu_to_le32(skb->len);
1308 txfd->fd.FDSystem = cpu_to_le32(lp->tfd_start);
1309 txfd->fd.FDCtl = cpu_to_le32(FD_CownsFD | (1 << FD_BDCnt_SHIFT));
1310
1311 if (lp->tfd_start == lp->tfd_end) {
1312 struct tc35815_regs __iomem *tr =
1313 (struct tc35815_regs __iomem *)dev->base_addr;
1314 /* Start DMA Transmitter. */
1315 txfd->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1316 txfd->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1317 if (netif_msg_tx_queued(lp)) {
1318 printk("%s: starting TxFD.\n", dev->name);
1319 dump_txfd(txfd);
1320 }
1321 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1322 } else {
1323 txfd->fd.FDNext &= cpu_to_le32(~FD_Next_EOL);
1324 if (netif_msg_tx_queued(lp)) {
1325 printk("%s: queueing TxFD.\n", dev->name);
1326 dump_txfd(txfd);
1327 }
1328 }
1329 lp->tfd_start = (lp->tfd_start + 1) % TX_FD_NUM;
1330
1331 /* If we just used up the very last entry in the
1332 * TX ring on this device, tell the queueing
1333 * layer to send no more.
1334 */
1335 if (tc35815_tx_full(dev)) {
1336 if (netif_msg_tx_queued(lp))
1337 printk(KERN_WARNING "%s: TxFD Exhausted.\n", dev->name);
1338 netif_stop_queue(dev);
1339 }
1340
1341 /* When the TX completion hw interrupt arrives, this
1342 * is when the transmit statistics are updated.
1343 */
1344
1345 spin_unlock_irqrestore(&lp->lock, flags);
1346 return NETDEV_TX_OK;
1347 }
1348
1349 #define FATAL_ERROR_INT \
1350 (Int_IntPCI | Int_DmParErr | Int_IntNRAbt)
tc35815_fatal_error_interrupt(struct net_device * dev,u32 status)1351 static void tc35815_fatal_error_interrupt(struct net_device *dev, u32 status)
1352 {
1353 static int count;
1354 printk(KERN_WARNING "%s: Fatal Error Interrupt (%#x):",
1355 dev->name, status);
1356 if (status & Int_IntPCI)
1357 printk(" IntPCI");
1358 if (status & Int_DmParErr)
1359 printk(" DmParErr");
1360 if (status & Int_IntNRAbt)
1361 printk(" IntNRAbt");
1362 printk("\n");
1363 if (count++ > 100)
1364 panic("%s: Too many fatal errors.", dev->name);
1365 printk(KERN_WARNING "%s: Resetting ...\n", dev->name);
1366 /* Try to restart the adaptor. */
1367 tc35815_schedule_restart(dev);
1368 }
1369
tc35815_do_interrupt(struct net_device * dev,u32 status,int limit)1370 static int tc35815_do_interrupt(struct net_device *dev, u32 status, int limit)
1371 {
1372 struct tc35815_local *lp = netdev_priv(dev);
1373 int ret = -1;
1374
1375 /* Fatal errors... */
1376 if (status & FATAL_ERROR_INT) {
1377 tc35815_fatal_error_interrupt(dev, status);
1378 return 0;
1379 }
1380 /* recoverable errors */
1381 if (status & Int_IntFDAEx) {
1382 if (netif_msg_rx_err(lp))
1383 dev_warn(&dev->dev,
1384 "Free Descriptor Area Exhausted (%#x).\n",
1385 status);
1386 dev->stats.rx_dropped++;
1387 ret = 0;
1388 }
1389 if (status & Int_IntBLEx) {
1390 if (netif_msg_rx_err(lp))
1391 dev_warn(&dev->dev,
1392 "Buffer List Exhausted (%#x).\n",
1393 status);
1394 dev->stats.rx_dropped++;
1395 ret = 0;
1396 }
1397 if (status & Int_IntExBD) {
1398 if (netif_msg_rx_err(lp))
1399 dev_warn(&dev->dev,
1400 "Excessive Buffer Descriptors (%#x).\n",
1401 status);
1402 dev->stats.rx_length_errors++;
1403 ret = 0;
1404 }
1405
1406 /* normal notification */
1407 if (status & Int_IntMacRx) {
1408 /* Got a packet(s). */
1409 ret = tc35815_rx(dev, limit);
1410 lp->lstats.rx_ints++;
1411 }
1412 if (status & Int_IntMacTx) {
1413 /* Transmit complete. */
1414 lp->lstats.tx_ints++;
1415 spin_lock_irq(&lp->lock);
1416 tc35815_txdone(dev);
1417 spin_unlock_irq(&lp->lock);
1418 if (ret < 0)
1419 ret = 0;
1420 }
1421 return ret;
1422 }
1423
1424 /*
1425 * The typical workload of the driver:
1426 * Handle the network interface interrupts.
1427 */
tc35815_interrupt(int irq,void * dev_id)1428 static irqreturn_t tc35815_interrupt(int irq, void *dev_id)
1429 {
1430 struct net_device *dev = dev_id;
1431 struct tc35815_local *lp = netdev_priv(dev);
1432 struct tc35815_regs __iomem *tr =
1433 (struct tc35815_regs __iomem *)dev->base_addr;
1434 u32 dmactl = tc_readl(&tr->DMA_Ctl);
1435
1436 if (!(dmactl & DMA_IntMask)) {
1437 /* disable interrupts */
1438 tc_writel(dmactl | DMA_IntMask, &tr->DMA_Ctl);
1439 if (napi_schedule_prep(&lp->napi))
1440 __napi_schedule(&lp->napi);
1441 else {
1442 printk(KERN_ERR "%s: interrupt taken in poll\n",
1443 dev->name);
1444 BUG();
1445 }
1446 (void)tc_readl(&tr->Int_Src); /* flush */
1447 return IRQ_HANDLED;
1448 }
1449 return IRQ_NONE;
1450 }
1451
1452 #ifdef CONFIG_NET_POLL_CONTROLLER
tc35815_poll_controller(struct net_device * dev)1453 static void tc35815_poll_controller(struct net_device *dev)
1454 {
1455 disable_irq(dev->irq);
1456 tc35815_interrupt(dev->irq, dev);
1457 enable_irq(dev->irq);
1458 }
1459 #endif
1460
1461 /* We have a good packet(s), get it/them out of the buffers. */
1462 static int
tc35815_rx(struct net_device * dev,int limit)1463 tc35815_rx(struct net_device *dev, int limit)
1464 {
1465 struct tc35815_local *lp = netdev_priv(dev);
1466 unsigned int fdctl;
1467 int i;
1468 int received = 0;
1469
1470 while (!((fdctl = le32_to_cpu(lp->rfd_cur->fd.FDCtl)) & FD_CownsFD)) {
1471 int status = le32_to_cpu(lp->rfd_cur->fd.FDStat);
1472 int pkt_len = fdctl & FD_FDLength_MASK;
1473 int bd_count = (fdctl & FD_BDCnt_MASK) >> FD_BDCnt_SHIFT;
1474 #ifdef DEBUG
1475 struct RxFD *next_rfd;
1476 #endif
1477 #if (RX_CTL_CMD & Rx_StripCRC) == 0
1478 pkt_len -= ETH_FCS_LEN;
1479 #endif
1480
1481 if (netif_msg_rx_status(lp))
1482 dump_rxfd(lp->rfd_cur);
1483 if (status & Rx_Good) {
1484 struct sk_buff *skb;
1485 unsigned char *data;
1486 int cur_bd;
1487
1488 if (--limit < 0)
1489 break;
1490 BUG_ON(bd_count > 1);
1491 cur_bd = (le32_to_cpu(lp->rfd_cur->bd[0].BDCtl)
1492 & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1493 #ifdef DEBUG
1494 if (cur_bd >= RX_BUF_NUM) {
1495 printk("%s: invalid BDID.\n", dev->name);
1496 panic_queues(dev);
1497 }
1498 BUG_ON(lp->rx_skbs[cur_bd].skb_dma !=
1499 (le32_to_cpu(lp->rfd_cur->bd[0].BuffData) & ~3));
1500 if (!lp->rx_skbs[cur_bd].skb) {
1501 printk("%s: NULL skb.\n", dev->name);
1502 panic_queues(dev);
1503 }
1504 #else
1505 BUG_ON(cur_bd >= RX_BUF_NUM);
1506 #endif
1507 skb = lp->rx_skbs[cur_bd].skb;
1508 prefetch(skb->data);
1509 lp->rx_skbs[cur_bd].skb = NULL;
1510 dma_unmap_single(&lp->pci_dev->dev,
1511 lp->rx_skbs[cur_bd].skb_dma,
1512 RX_BUF_SIZE, DMA_FROM_DEVICE);
1513 if (!HAVE_DMA_RXALIGN(lp) && NET_IP_ALIGN != 0)
1514 memmove(skb->data, skb->data - NET_IP_ALIGN,
1515 pkt_len);
1516 data = skb_put(skb, pkt_len);
1517 if (netif_msg_pktdata(lp))
1518 print_eth(data);
1519 skb->protocol = eth_type_trans(skb, dev);
1520 netif_receive_skb(skb);
1521 received++;
1522 dev->stats.rx_packets++;
1523 dev->stats.rx_bytes += pkt_len;
1524 } else {
1525 dev->stats.rx_errors++;
1526 if (netif_msg_rx_err(lp))
1527 dev_info(&dev->dev, "Rx error (status %x)\n",
1528 status & Rx_Stat_Mask);
1529 /* WORKAROUND: LongErr and CRCErr means Overflow. */
1530 if ((status & Rx_LongErr) && (status & Rx_CRCErr)) {
1531 status &= ~(Rx_LongErr|Rx_CRCErr);
1532 status |= Rx_Over;
1533 }
1534 if (status & Rx_LongErr)
1535 dev->stats.rx_length_errors++;
1536 if (status & Rx_Over)
1537 dev->stats.rx_fifo_errors++;
1538 if (status & Rx_CRCErr)
1539 dev->stats.rx_crc_errors++;
1540 if (status & Rx_Align)
1541 dev->stats.rx_frame_errors++;
1542 }
1543
1544 if (bd_count > 0) {
1545 /* put Free Buffer back to controller */
1546 int bdctl = le32_to_cpu(lp->rfd_cur->bd[bd_count - 1].BDCtl);
1547 unsigned char id =
1548 (bdctl & BD_RxBDID_MASK) >> BD_RxBDID_SHIFT;
1549 #ifdef DEBUG
1550 if (id >= RX_BUF_NUM) {
1551 printk("%s: invalid BDID.\n", dev->name);
1552 panic_queues(dev);
1553 }
1554 #else
1555 BUG_ON(id >= RX_BUF_NUM);
1556 #endif
1557 /* free old buffers */
1558 lp->fbl_count--;
1559 while (lp->fbl_count < RX_BUF_NUM)
1560 {
1561 unsigned char curid =
1562 (id + 1 + lp->fbl_count) % RX_BUF_NUM;
1563 struct BDesc *bd = &lp->fbl_ptr->bd[curid];
1564 #ifdef DEBUG
1565 bdctl = le32_to_cpu(bd->BDCtl);
1566 if (bdctl & BD_CownsBD) {
1567 printk("%s: Freeing invalid BD.\n",
1568 dev->name);
1569 panic_queues(dev);
1570 }
1571 #endif
1572 /* pass BD to controller */
1573 if (!lp->rx_skbs[curid].skb) {
1574 lp->rx_skbs[curid].skb =
1575 alloc_rxbuf_skb(dev,
1576 lp->pci_dev,
1577 &lp->rx_skbs[curid].skb_dma);
1578 if (!lp->rx_skbs[curid].skb)
1579 break; /* try on next reception */
1580 bd->BuffData = cpu_to_le32(lp->rx_skbs[curid].skb_dma);
1581 }
1582 /* Note: BDLength was modified by chip. */
1583 bd->BDCtl = cpu_to_le32(BD_CownsBD |
1584 (curid << BD_RxBDID_SHIFT) |
1585 RX_BUF_SIZE);
1586 lp->fbl_count++;
1587 }
1588 }
1589
1590 /* put RxFD back to controller */
1591 #ifdef DEBUG
1592 next_rfd = fd_bus_to_virt(lp,
1593 le32_to_cpu(lp->rfd_cur->fd.FDNext));
1594 if (next_rfd < lp->rfd_base || next_rfd > lp->rfd_limit) {
1595 printk("%s: RxFD FDNext invalid.\n", dev->name);
1596 panic_queues(dev);
1597 }
1598 #endif
1599 for (i = 0; i < (bd_count + 1) / 2 + 1; i++) {
1600 /* pass FD to controller */
1601 #ifdef DEBUG
1602 lp->rfd_cur->fd.FDNext = cpu_to_le32(0xdeaddead);
1603 #else
1604 lp->rfd_cur->fd.FDNext = cpu_to_le32(FD_Next_EOL);
1605 #endif
1606 lp->rfd_cur->fd.FDCtl = cpu_to_le32(FD_CownsFD);
1607 lp->rfd_cur++;
1608 }
1609 if (lp->rfd_cur > lp->rfd_limit)
1610 lp->rfd_cur = lp->rfd_base;
1611 #ifdef DEBUG
1612 if (lp->rfd_cur != next_rfd)
1613 printk("rfd_cur = %p, next_rfd %p\n",
1614 lp->rfd_cur, next_rfd);
1615 #endif
1616 }
1617
1618 return received;
1619 }
1620
tc35815_poll(struct napi_struct * napi,int budget)1621 static int tc35815_poll(struct napi_struct *napi, int budget)
1622 {
1623 struct tc35815_local *lp = container_of(napi, struct tc35815_local, napi);
1624 struct net_device *dev = lp->dev;
1625 struct tc35815_regs __iomem *tr =
1626 (struct tc35815_regs __iomem *)dev->base_addr;
1627 int received = 0, handled;
1628 u32 status;
1629
1630 if (budget <= 0)
1631 return received;
1632
1633 spin_lock(&lp->rx_lock);
1634 status = tc_readl(&tr->Int_Src);
1635 do {
1636 /* BLEx, FDAEx will be cleared later */
1637 tc_writel(status & ~(Int_BLEx | Int_FDAEx),
1638 &tr->Int_Src); /* write to clear */
1639
1640 handled = tc35815_do_interrupt(dev, status, budget - received);
1641 if (status & (Int_BLEx | Int_FDAEx))
1642 tc_writel(status & (Int_BLEx | Int_FDAEx),
1643 &tr->Int_Src);
1644 if (handled >= 0) {
1645 received += handled;
1646 if (received >= budget)
1647 break;
1648 }
1649 status = tc_readl(&tr->Int_Src);
1650 } while (status);
1651 spin_unlock(&lp->rx_lock);
1652
1653 if (received < budget) {
1654 napi_complete_done(napi, received);
1655 /* enable interrupts */
1656 tc_writel(tc_readl(&tr->DMA_Ctl) & ~DMA_IntMask, &tr->DMA_Ctl);
1657 }
1658 return received;
1659 }
1660
1661 #define TX_STA_ERR (Tx_ExColl|Tx_Under|Tx_Defer|Tx_NCarr|Tx_LateColl|Tx_TxPar|Tx_SQErr)
1662
1663 static void
tc35815_check_tx_stat(struct net_device * dev,int status)1664 tc35815_check_tx_stat(struct net_device *dev, int status)
1665 {
1666 struct tc35815_local *lp = netdev_priv(dev);
1667 const char *msg = NULL;
1668
1669 /* count collisions */
1670 if (status & Tx_ExColl)
1671 dev->stats.collisions += 16;
1672 if (status & Tx_TxColl_MASK)
1673 dev->stats.collisions += status & Tx_TxColl_MASK;
1674
1675 /* TX4939 does not have NCarr */
1676 if (lp->chiptype == TC35815_TX4939)
1677 status &= ~Tx_NCarr;
1678 /* WORKAROUND: ignore LostCrS in full duplex operation */
1679 if (!lp->link || lp->duplex == DUPLEX_FULL)
1680 status &= ~Tx_NCarr;
1681
1682 if (!(status & TX_STA_ERR)) {
1683 /* no error. */
1684 dev->stats.tx_packets++;
1685 return;
1686 }
1687
1688 dev->stats.tx_errors++;
1689 if (status & Tx_ExColl) {
1690 dev->stats.tx_aborted_errors++;
1691 msg = "Excessive Collision.";
1692 }
1693 if (status & Tx_Under) {
1694 dev->stats.tx_fifo_errors++;
1695 msg = "Tx FIFO Underrun.";
1696 if (lp->lstats.tx_underrun < TX_THRESHOLD_KEEP_LIMIT) {
1697 lp->lstats.tx_underrun++;
1698 if (lp->lstats.tx_underrun >= TX_THRESHOLD_KEEP_LIMIT) {
1699 struct tc35815_regs __iomem *tr =
1700 (struct tc35815_regs __iomem *)dev->base_addr;
1701 tc_writel(TX_THRESHOLD_MAX, &tr->TxThrsh);
1702 msg = "Tx FIFO Underrun.Change Tx threshold to max.";
1703 }
1704 }
1705 }
1706 if (status & Tx_Defer) {
1707 dev->stats.tx_fifo_errors++;
1708 msg = "Excessive Deferral.";
1709 }
1710 if (status & Tx_NCarr) {
1711 dev->stats.tx_carrier_errors++;
1712 msg = "Lost Carrier Sense.";
1713 }
1714 if (status & Tx_LateColl) {
1715 dev->stats.tx_aborted_errors++;
1716 msg = "Late Collision.";
1717 }
1718 if (status & Tx_TxPar) {
1719 dev->stats.tx_fifo_errors++;
1720 msg = "Transmit Parity Error.";
1721 }
1722 if (status & Tx_SQErr) {
1723 dev->stats.tx_heartbeat_errors++;
1724 msg = "Signal Quality Error.";
1725 }
1726 if (msg && netif_msg_tx_err(lp))
1727 printk(KERN_WARNING "%s: %s (%#x)\n", dev->name, msg, status);
1728 }
1729
1730 /* This handles TX complete events posted by the device
1731 * via interrupts.
1732 */
1733 static void
tc35815_txdone(struct net_device * dev)1734 tc35815_txdone(struct net_device *dev)
1735 {
1736 struct tc35815_local *lp = netdev_priv(dev);
1737 struct TxFD *txfd;
1738 unsigned int fdctl;
1739
1740 txfd = &lp->tfd_base[lp->tfd_end];
1741 while (lp->tfd_start != lp->tfd_end &&
1742 !((fdctl = le32_to_cpu(txfd->fd.FDCtl)) & FD_CownsFD)) {
1743 int status = le32_to_cpu(txfd->fd.FDStat);
1744 struct sk_buff *skb;
1745 unsigned long fdnext = le32_to_cpu(txfd->fd.FDNext);
1746 u32 fdsystem = le32_to_cpu(txfd->fd.FDSystem);
1747
1748 if (netif_msg_tx_done(lp)) {
1749 printk("%s: complete TxFD.\n", dev->name);
1750 dump_txfd(txfd);
1751 }
1752 tc35815_check_tx_stat(dev, status);
1753
1754 skb = fdsystem != 0xffffffff ?
1755 lp->tx_skbs[fdsystem].skb : NULL;
1756 #ifdef DEBUG
1757 if (lp->tx_skbs[lp->tfd_end].skb != skb) {
1758 printk("%s: tx_skbs mismatch.\n", dev->name);
1759 panic_queues(dev);
1760 }
1761 #else
1762 BUG_ON(lp->tx_skbs[lp->tfd_end].skb != skb);
1763 #endif
1764 if (skb) {
1765 dev->stats.tx_bytes += skb->len;
1766 dma_unmap_single(&lp->pci_dev->dev,
1767 lp->tx_skbs[lp->tfd_end].skb_dma,
1768 skb->len, DMA_TO_DEVICE);
1769 lp->tx_skbs[lp->tfd_end].skb = NULL;
1770 lp->tx_skbs[lp->tfd_end].skb_dma = 0;
1771 dev_kfree_skb_any(skb);
1772 }
1773 txfd->fd.FDSystem = cpu_to_le32(0xffffffff);
1774
1775 lp->tfd_end = (lp->tfd_end + 1) % TX_FD_NUM;
1776 txfd = &lp->tfd_base[lp->tfd_end];
1777 #ifdef DEBUG
1778 if ((fdnext & ~FD_Next_EOL) != fd_virt_to_bus(lp, txfd)) {
1779 printk("%s: TxFD FDNext invalid.\n", dev->name);
1780 panic_queues(dev);
1781 }
1782 #endif
1783 if (fdnext & FD_Next_EOL) {
1784 /* DMA Transmitter has been stopping... */
1785 if (lp->tfd_end != lp->tfd_start) {
1786 struct tc35815_regs __iomem *tr =
1787 (struct tc35815_regs __iomem *)dev->base_addr;
1788 int head = (lp->tfd_start + TX_FD_NUM - 1) % TX_FD_NUM;
1789 struct TxFD *txhead = &lp->tfd_base[head];
1790 int qlen = (lp->tfd_start + TX_FD_NUM
1791 - lp->tfd_end) % TX_FD_NUM;
1792
1793 #ifdef DEBUG
1794 if (!(le32_to_cpu(txfd->fd.FDCtl) & FD_CownsFD)) {
1795 printk("%s: TxFD FDCtl invalid.\n", dev->name);
1796 panic_queues(dev);
1797 }
1798 #endif
1799 /* log max queue length */
1800 if (lp->lstats.max_tx_qlen < qlen)
1801 lp->lstats.max_tx_qlen = qlen;
1802
1803
1804 /* start DMA Transmitter again */
1805 txhead->fd.FDNext |= cpu_to_le32(FD_Next_EOL);
1806 txhead->fd.FDCtl |= cpu_to_le32(FD_FrmOpt_IntTx);
1807 if (netif_msg_tx_queued(lp)) {
1808 printk("%s: start TxFD on queue.\n",
1809 dev->name);
1810 dump_txfd(txfd);
1811 }
1812 tc_writel(fd_virt_to_bus(lp, txfd), &tr->TxFrmPtr);
1813 }
1814 break;
1815 }
1816 }
1817
1818 /* If we had stopped the queue due to a "tx full"
1819 * condition, and space has now been made available,
1820 * wake up the queue.
1821 */
1822 if (netif_queue_stopped(dev) && !tc35815_tx_full(dev))
1823 netif_wake_queue(dev);
1824 }
1825
1826 /* The inverse routine to tc35815_open(). */
1827 static int
tc35815_close(struct net_device * dev)1828 tc35815_close(struct net_device *dev)
1829 {
1830 struct tc35815_local *lp = netdev_priv(dev);
1831
1832 netif_stop_queue(dev);
1833 napi_disable(&lp->napi);
1834 if (dev->phydev)
1835 phy_stop(dev->phydev);
1836 cancel_work_sync(&lp->restart_work);
1837
1838 /* Flush the Tx and disable Rx here. */
1839 tc35815_chip_reset(dev);
1840 free_irq(dev->irq, dev);
1841
1842 tc35815_free_queues(dev);
1843
1844 return 0;
1845
1846 }
1847
1848 /*
1849 * Get the current statistics.
1850 * This may be called with the card open or closed.
1851 */
tc35815_get_stats(struct net_device * dev)1852 static struct net_device_stats *tc35815_get_stats(struct net_device *dev)
1853 {
1854 struct tc35815_regs __iomem *tr =
1855 (struct tc35815_regs __iomem *)dev->base_addr;
1856 if (netif_running(dev))
1857 /* Update the statistics from the device registers. */
1858 dev->stats.rx_missed_errors += tc_readl(&tr->Miss_Cnt);
1859
1860 return &dev->stats;
1861 }
1862
tc35815_set_cam_entry(struct net_device * dev,int index,const unsigned char * addr)1863 static void tc35815_set_cam_entry(struct net_device *dev, int index,
1864 const unsigned char *addr)
1865 {
1866 struct tc35815_local *lp = netdev_priv(dev);
1867 struct tc35815_regs __iomem *tr =
1868 (struct tc35815_regs __iomem *)dev->base_addr;
1869 int cam_index = index * 6;
1870 u32 cam_data;
1871 u32 saved_addr;
1872
1873 saved_addr = tc_readl(&tr->CAM_Adr);
1874
1875 if (netif_msg_hw(lp))
1876 printk(KERN_DEBUG "%s: CAM %d: %pM\n",
1877 dev->name, index, addr);
1878 if (index & 1) {
1879 /* read modify write */
1880 tc_writel(cam_index - 2, &tr->CAM_Adr);
1881 cam_data = tc_readl(&tr->CAM_Data) & 0xffff0000;
1882 cam_data |= addr[0] << 8 | addr[1];
1883 tc_writel(cam_data, &tr->CAM_Data);
1884 /* write whole word */
1885 tc_writel(cam_index + 2, &tr->CAM_Adr);
1886 cam_data = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
1887 tc_writel(cam_data, &tr->CAM_Data);
1888 } else {
1889 /* write whole word */
1890 tc_writel(cam_index, &tr->CAM_Adr);
1891 cam_data = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
1892 tc_writel(cam_data, &tr->CAM_Data);
1893 /* read modify write */
1894 tc_writel(cam_index + 4, &tr->CAM_Adr);
1895 cam_data = tc_readl(&tr->CAM_Data) & 0x0000ffff;
1896 cam_data |= addr[4] << 24 | (addr[5] << 16);
1897 tc_writel(cam_data, &tr->CAM_Data);
1898 }
1899
1900 tc_writel(saved_addr, &tr->CAM_Adr);
1901 }
1902
1903
1904 /*
1905 * Set or clear the multicast filter for this adaptor.
1906 * num_addrs == -1 Promiscuous mode, receive all packets
1907 * num_addrs == 0 Normal mode, clear multicast list
1908 * num_addrs > 0 Multicast mode, receive normal and MC packets,
1909 * and do best-effort filtering.
1910 */
1911 static void
tc35815_set_multicast_list(struct net_device * dev)1912 tc35815_set_multicast_list(struct net_device *dev)
1913 {
1914 struct tc35815_regs __iomem *tr =
1915 (struct tc35815_regs __iomem *)dev->base_addr;
1916
1917 if (dev->flags & IFF_PROMISC) {
1918 /* With some (all?) 100MHalf HUB, controller will hang
1919 * if we enabled promiscuous mode before linkup...
1920 */
1921 struct tc35815_local *lp = netdev_priv(dev);
1922
1923 if (!lp->link)
1924 return;
1925 /* Enable promiscuous mode */
1926 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc | CAM_StationAcc, &tr->CAM_Ctl);
1927 } else if ((dev->flags & IFF_ALLMULTI) ||
1928 netdev_mc_count(dev) > CAM_ENTRY_MAX - 3) {
1929 /* CAM 0, 1, 20 are reserved. */
1930 /* Disable promiscuous mode, use normal mode. */
1931 tc_writel(CAM_CompEn | CAM_BroadAcc | CAM_GroupAcc, &tr->CAM_Ctl);
1932 } else if (!netdev_mc_empty(dev)) {
1933 struct netdev_hw_addr *ha;
1934 int i;
1935 int ena_bits = CAM_Ena_Bit(CAM_ENTRY_SOURCE);
1936
1937 tc_writel(0, &tr->CAM_Ctl);
1938 /* Walk the address list, and load the filter */
1939 i = 0;
1940 netdev_for_each_mc_addr(ha, dev) {
1941 /* entry 0,1 is reserved. */
1942 tc35815_set_cam_entry(dev, i + 2, ha->addr);
1943 ena_bits |= CAM_Ena_Bit(i + 2);
1944 i++;
1945 }
1946 tc_writel(ena_bits, &tr->CAM_Ena);
1947 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1948 } else {
1949 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
1950 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
1951 }
1952 }
1953
tc35815_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1954 static void tc35815_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1955 {
1956 struct tc35815_local *lp = netdev_priv(dev);
1957
1958 strscpy(info->driver, MODNAME, sizeof(info->driver));
1959 strscpy(info->version, DRV_VERSION, sizeof(info->version));
1960 strscpy(info->bus_info, pci_name(lp->pci_dev), sizeof(info->bus_info));
1961 }
1962
tc35815_get_msglevel(struct net_device * dev)1963 static u32 tc35815_get_msglevel(struct net_device *dev)
1964 {
1965 struct tc35815_local *lp = netdev_priv(dev);
1966 return lp->msg_enable;
1967 }
1968
tc35815_set_msglevel(struct net_device * dev,u32 datum)1969 static void tc35815_set_msglevel(struct net_device *dev, u32 datum)
1970 {
1971 struct tc35815_local *lp = netdev_priv(dev);
1972 lp->msg_enable = datum;
1973 }
1974
tc35815_get_sset_count(struct net_device * dev,int sset)1975 static int tc35815_get_sset_count(struct net_device *dev, int sset)
1976 {
1977 struct tc35815_local *lp = netdev_priv(dev);
1978
1979 switch (sset) {
1980 case ETH_SS_STATS:
1981 return sizeof(lp->lstats) / sizeof(int);
1982 default:
1983 return -EOPNOTSUPP;
1984 }
1985 }
1986
tc35815_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)1987 static void tc35815_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
1988 {
1989 struct tc35815_local *lp = netdev_priv(dev);
1990 data[0] = lp->lstats.max_tx_qlen;
1991 data[1] = lp->lstats.tx_ints;
1992 data[2] = lp->lstats.rx_ints;
1993 data[3] = lp->lstats.tx_underrun;
1994 }
1995
1996 static struct {
1997 const char str[ETH_GSTRING_LEN];
1998 } ethtool_stats_keys[] = {
1999 { "max_tx_qlen" },
2000 { "tx_ints" },
2001 { "rx_ints" },
2002 { "tx_underrun" },
2003 };
2004
tc35815_get_strings(struct net_device * dev,u32 stringset,u8 * data)2005 static void tc35815_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2006 {
2007 memcpy(data, ethtool_stats_keys, sizeof(ethtool_stats_keys));
2008 }
2009
2010 static const struct ethtool_ops tc35815_ethtool_ops = {
2011 .get_drvinfo = tc35815_get_drvinfo,
2012 .get_link = ethtool_op_get_link,
2013 .get_msglevel = tc35815_get_msglevel,
2014 .set_msglevel = tc35815_set_msglevel,
2015 .get_strings = tc35815_get_strings,
2016 .get_sset_count = tc35815_get_sset_count,
2017 .get_ethtool_stats = tc35815_get_ethtool_stats,
2018 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2019 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2020 };
2021
tc35815_chip_reset(struct net_device * dev)2022 static void tc35815_chip_reset(struct net_device *dev)
2023 {
2024 struct tc35815_regs __iomem *tr =
2025 (struct tc35815_regs __iomem *)dev->base_addr;
2026 int i;
2027 /* reset the controller */
2028 tc_writel(MAC_Reset, &tr->MAC_Ctl);
2029 udelay(4); /* 3200ns */
2030 i = 0;
2031 while (tc_readl(&tr->MAC_Ctl) & MAC_Reset) {
2032 if (i++ > 100) {
2033 printk(KERN_ERR "%s: MAC reset failed.\n", dev->name);
2034 break;
2035 }
2036 mdelay(1);
2037 }
2038 tc_writel(0, &tr->MAC_Ctl);
2039
2040 /* initialize registers to default value */
2041 tc_writel(0, &tr->DMA_Ctl);
2042 tc_writel(0, &tr->TxThrsh);
2043 tc_writel(0, &tr->TxPollCtr);
2044 tc_writel(0, &tr->RxFragSize);
2045 tc_writel(0, &tr->Int_En);
2046 tc_writel(0, &tr->FDA_Bas);
2047 tc_writel(0, &tr->FDA_Lim);
2048 tc_writel(0xffffffff, &tr->Int_Src); /* Write 1 to clear */
2049 tc_writel(0, &tr->CAM_Ctl);
2050 tc_writel(0, &tr->Tx_Ctl);
2051 tc_writel(0, &tr->Rx_Ctl);
2052 tc_writel(0, &tr->CAM_Ena);
2053 (void)tc_readl(&tr->Miss_Cnt); /* Read to clear */
2054
2055 /* initialize internal SRAM */
2056 tc_writel(DMA_TestMode, &tr->DMA_Ctl);
2057 for (i = 0; i < 0x1000; i += 4) {
2058 tc_writel(i, &tr->CAM_Adr);
2059 tc_writel(0, &tr->CAM_Data);
2060 }
2061 tc_writel(0, &tr->DMA_Ctl);
2062 }
2063
tc35815_chip_init(struct net_device * dev)2064 static void tc35815_chip_init(struct net_device *dev)
2065 {
2066 struct tc35815_local *lp = netdev_priv(dev);
2067 struct tc35815_regs __iomem *tr =
2068 (struct tc35815_regs __iomem *)dev->base_addr;
2069 unsigned long txctl = TX_CTL_CMD;
2070
2071 /* load station address to CAM */
2072 tc35815_set_cam_entry(dev, CAM_ENTRY_SOURCE, dev->dev_addr);
2073
2074 /* Enable CAM (broadcast and unicast) */
2075 tc_writel(CAM_Ena_Bit(CAM_ENTRY_SOURCE), &tr->CAM_Ena);
2076 tc_writel(CAM_CompEn | CAM_BroadAcc, &tr->CAM_Ctl);
2077
2078 /* Use DMA_RxAlign_2 to make IP header 4-byte aligned. */
2079 if (HAVE_DMA_RXALIGN(lp))
2080 tc_writel(DMA_BURST_SIZE | DMA_RxAlign_2, &tr->DMA_Ctl);
2081 else
2082 tc_writel(DMA_BURST_SIZE, &tr->DMA_Ctl);
2083 tc_writel(0, &tr->TxPollCtr); /* Batch mode */
2084 tc_writel(TX_THRESHOLD, &tr->TxThrsh);
2085 tc_writel(INT_EN_CMD, &tr->Int_En);
2086
2087 /* set queues */
2088 tc_writel(fd_virt_to_bus(lp, lp->rfd_base), &tr->FDA_Bas);
2089 tc_writel((unsigned long)lp->rfd_limit - (unsigned long)lp->rfd_base,
2090 &tr->FDA_Lim);
2091 /*
2092 * Activation method:
2093 * First, enable the MAC Transmitter and the DMA Receive circuits.
2094 * Then enable the DMA Transmitter and the MAC Receive circuits.
2095 */
2096 tc_writel(fd_virt_to_bus(lp, lp->fbl_ptr), &tr->BLFrmPtr); /* start DMA receiver */
2097 tc_writel(RX_CTL_CMD, &tr->Rx_Ctl); /* start MAC receiver */
2098
2099 /* start MAC transmitter */
2100 /* TX4939 does not have EnLCarr */
2101 if (lp->chiptype == TC35815_TX4939)
2102 txctl &= ~Tx_EnLCarr;
2103 /* WORKAROUND: ignore LostCrS in full duplex operation */
2104 if (!dev->phydev || !lp->link || lp->duplex == DUPLEX_FULL)
2105 txctl &= ~Tx_EnLCarr;
2106 tc_writel(txctl, &tr->Tx_Ctl);
2107 }
2108
2109 #ifdef CONFIG_PM
tc35815_suspend(struct pci_dev * pdev,pm_message_t state)2110 static int tc35815_suspend(struct pci_dev *pdev, pm_message_t state)
2111 {
2112 struct net_device *dev = pci_get_drvdata(pdev);
2113 struct tc35815_local *lp = netdev_priv(dev);
2114 unsigned long flags;
2115
2116 pci_save_state(pdev);
2117 if (!netif_running(dev))
2118 return 0;
2119 netif_device_detach(dev);
2120 if (dev->phydev)
2121 phy_stop(dev->phydev);
2122 spin_lock_irqsave(&lp->lock, flags);
2123 tc35815_chip_reset(dev);
2124 spin_unlock_irqrestore(&lp->lock, flags);
2125 pci_set_power_state(pdev, PCI_D3hot);
2126 return 0;
2127 }
2128
tc35815_resume(struct pci_dev * pdev)2129 static int tc35815_resume(struct pci_dev *pdev)
2130 {
2131 struct net_device *dev = pci_get_drvdata(pdev);
2132
2133 pci_restore_state(pdev);
2134 if (!netif_running(dev))
2135 return 0;
2136 pci_set_power_state(pdev, PCI_D0);
2137 tc35815_restart(dev);
2138 netif_carrier_off(dev);
2139 if (dev->phydev)
2140 phy_start(dev->phydev);
2141 netif_device_attach(dev);
2142 return 0;
2143 }
2144 #endif /* CONFIG_PM */
2145
2146 static struct pci_driver tc35815_pci_driver = {
2147 .name = MODNAME,
2148 .id_table = tc35815_pci_tbl,
2149 .probe = tc35815_init_one,
2150 .remove = tc35815_remove_one,
2151 #ifdef CONFIG_PM
2152 .suspend = tc35815_suspend,
2153 .resume = tc35815_resume,
2154 #endif
2155 };
2156
2157 module_param_named(speed, options.speed, int, 0);
2158 MODULE_PARM_DESC(speed, "0:auto, 10:10Mbps, 100:100Mbps");
2159 module_param_named(duplex, options.duplex, int, 0);
2160 MODULE_PARM_DESC(duplex, "0:auto, 1:half, 2:full");
2161
2162 module_pci_driver(tc35815_pci_driver);
2163 MODULE_DESCRIPTION("TOSHIBA TC35815 PCI 10M/100M Ethernet driver");
2164 MODULE_LICENSE("GPL");
2165