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[NET]: Avoid allocating skb in skb_pad
[deliverable/linux.git] / drivers / net / sis190.c
1 /*
2 sis190.c: Silicon Integrated Systems SiS190 ethernet driver
3
4 Copyright (c) 2003 K.M. Liu <kmliu@sis.com>
5 Copyright (c) 2003, 2004 Jeff Garzik <jgarzik@pobox.com>
6 Copyright (c) 2003, 2004, 2005 Francois Romieu <romieu@fr.zoreil.com>
7
8 Based on r8169.c, tg3.c, 8139cp.c, skge.c, epic100.c and SiS 190/191
9 genuine driver.
10
11 This software may be used and distributed according to the terms of
12 the GNU General Public License (GPL), incorporated herein by reference.
13 Drivers based on or derived from this code fall under the GPL and must
14 retain the authorship, copyright and license notice. This file is not
15 a complete program and may only be used when the entire operating
16 system is licensed under the GPL.
17
18 See the file COPYING in this distribution for more information.
19
20 */
21
22 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/netdevice.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
28 #include <linux/pci.h>
29 #include <linux/mii.h>
30 #include <linux/delay.h>
31 #include <linux/crc32.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/irq.h>
34
35 #define net_drv(p, arg...) if (netif_msg_drv(p)) \
36 printk(arg)
37 #define net_probe(p, arg...) if (netif_msg_probe(p)) \
38 printk(arg)
39 #define net_link(p, arg...) if (netif_msg_link(p)) \
40 printk(arg)
41 #define net_intr(p, arg...) if (netif_msg_intr(p)) \
42 printk(arg)
43 #define net_tx_err(p, arg...) if (netif_msg_tx_err(p)) \
44 printk(arg)
45
46 #define PHY_MAX_ADDR 32
47 #define PHY_ID_ANY 0x1f
48 #define MII_REG_ANY 0x1f
49
50 #ifdef CONFIG_SIS190_NAPI
51 #define NAPI_SUFFIX "-NAPI"
52 #else
53 #define NAPI_SUFFIX ""
54 #endif
55
56 #define DRV_VERSION "1.2" NAPI_SUFFIX
57 #define DRV_NAME "sis190"
58 #define SIS190_DRIVER_NAME DRV_NAME " Gigabit Ethernet driver " DRV_VERSION
59 #define PFX DRV_NAME ": "
60
61 #ifdef CONFIG_SIS190_NAPI
62 #define sis190_rx_skb netif_receive_skb
63 #define sis190_rx_quota(count, quota) min(count, quota)
64 #else
65 #define sis190_rx_skb netif_rx
66 #define sis190_rx_quota(count, quota) count
67 #endif
68
69 #define MAC_ADDR_LEN 6
70
71 #define NUM_TX_DESC 64 /* [8..1024] */
72 #define NUM_RX_DESC 64 /* [8..8192] */
73 #define TX_RING_BYTES (NUM_TX_DESC * sizeof(struct TxDesc))
74 #define RX_RING_BYTES (NUM_RX_DESC * sizeof(struct RxDesc))
75 #define RX_BUF_SIZE 1536
76 #define RX_BUF_MASK 0xfff8
77
78 #define SIS190_REGS_SIZE 0x80
79 #define SIS190_TX_TIMEOUT (6*HZ)
80 #define SIS190_PHY_TIMEOUT (10*HZ)
81 #define SIS190_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
82 NETIF_MSG_LINK | NETIF_MSG_IFUP | \
83 NETIF_MSG_IFDOWN)
84
85 /* Enhanced PHY access register bit definitions */
86 #define EhnMIIread 0x0000
87 #define EhnMIIwrite 0x0020
88 #define EhnMIIdataShift 16
89 #define EhnMIIpmdShift 6 /* 7016 only */
90 #define EhnMIIregShift 11
91 #define EhnMIIreq 0x0010
92 #define EhnMIInotDone 0x0010
93
94 /* Write/read MMIO register */
95 #define SIS_W8(reg, val) writeb ((val), ioaddr + (reg))
96 #define SIS_W16(reg, val) writew ((val), ioaddr + (reg))
97 #define SIS_W32(reg, val) writel ((val), ioaddr + (reg))
98 #define SIS_R8(reg) readb (ioaddr + (reg))
99 #define SIS_R16(reg) readw (ioaddr + (reg))
100 #define SIS_R32(reg) readl (ioaddr + (reg))
101
102 #define SIS_PCI_COMMIT() SIS_R32(IntrControl)
103
104 enum sis190_registers {
105 TxControl = 0x00,
106 TxDescStartAddr = 0x04,
107 rsv0 = 0x08, // reserved
108 TxSts = 0x0c, // unused (Control/Status)
109 RxControl = 0x10,
110 RxDescStartAddr = 0x14,
111 rsv1 = 0x18, // reserved
112 RxSts = 0x1c, // unused
113 IntrStatus = 0x20,
114 IntrMask = 0x24,
115 IntrControl = 0x28,
116 IntrTimer = 0x2c, // unused (Interupt Timer)
117 PMControl = 0x30, // unused (Power Mgmt Control/Status)
118 rsv2 = 0x34, // reserved
119 ROMControl = 0x38,
120 ROMInterface = 0x3c,
121 StationControl = 0x40,
122 GMIIControl = 0x44,
123 GIoCR = 0x48, // unused (GMAC IO Compensation)
124 GIoCtrl = 0x4c, // unused (GMAC IO Control)
125 TxMacControl = 0x50,
126 TxLimit = 0x54, // unused (Tx MAC Timer/TryLimit)
127 RGDelay = 0x58, // unused (RGMII Tx Internal Delay)
128 rsv3 = 0x5c, // reserved
129 RxMacControl = 0x60,
130 RxMacAddr = 0x62,
131 RxHashTable = 0x68,
132 // Undocumented = 0x6c,
133 RxWolCtrl = 0x70,
134 RxWolData = 0x74, // unused (Rx WOL Data Access)
135 RxMPSControl = 0x78, // unused (Rx MPS Control)
136 rsv4 = 0x7c, // reserved
137 };
138
139 enum sis190_register_content {
140 /* IntrStatus */
141 SoftInt = 0x40000000, // unused
142 Timeup = 0x20000000, // unused
143 PauseFrame = 0x00080000, // unused
144 MagicPacket = 0x00040000, // unused
145 WakeupFrame = 0x00020000, // unused
146 LinkChange = 0x00010000,
147 RxQEmpty = 0x00000080,
148 RxQInt = 0x00000040,
149 TxQ1Empty = 0x00000020, // unused
150 TxQ1Int = 0x00000010,
151 TxQ0Empty = 0x00000008, // unused
152 TxQ0Int = 0x00000004,
153 RxHalt = 0x00000002,
154 TxHalt = 0x00000001,
155
156 /* {Rx/Tx}CmdBits */
157 CmdReset = 0x10,
158 CmdRxEnb = 0x08, // unused
159 CmdTxEnb = 0x01,
160 RxBufEmpty = 0x01, // unused
161
162 /* Cfg9346Bits */
163 Cfg9346_Lock = 0x00, // unused
164 Cfg9346_Unlock = 0xc0, // unused
165
166 /* RxMacControl */
167 AcceptErr = 0x20, // unused
168 AcceptRunt = 0x10, // unused
169 AcceptBroadcast = 0x0800,
170 AcceptMulticast = 0x0400,
171 AcceptMyPhys = 0x0200,
172 AcceptAllPhys = 0x0100,
173
174 /* RxConfigBits */
175 RxCfgFIFOShift = 13,
176 RxCfgDMAShift = 8, // 0x1a in RxControl ?
177
178 /* TxConfigBits */
179 TxInterFrameGapShift = 24,
180 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
181
182 LinkStatus = 0x02, // unused
183 FullDup = 0x01, // unused
184
185 /* TBICSRBit */
186 TBILinkOK = 0x02000000, // unused
187 };
188
189 struct TxDesc {
190 __le32 PSize;
191 __le32 status;
192 __le32 addr;
193 __le32 size;
194 };
195
196 struct RxDesc {
197 __le32 PSize;
198 __le32 status;
199 __le32 addr;
200 __le32 size;
201 };
202
203 enum _DescStatusBit {
204 /* _Desc.status */
205 OWNbit = 0x80000000, // RXOWN/TXOWN
206 INTbit = 0x40000000, // RXINT/TXINT
207 CRCbit = 0x00020000, // CRCOFF/CRCEN
208 PADbit = 0x00010000, // PREADD/PADEN
209 /* _Desc.size */
210 RingEnd = 0x80000000,
211 /* TxDesc.status */
212 LSEN = 0x08000000, // TSO ? -- FR
213 IPCS = 0x04000000,
214 TCPCS = 0x02000000,
215 UDPCS = 0x01000000,
216 BSTEN = 0x00800000,
217 EXTEN = 0x00400000,
218 DEFEN = 0x00200000,
219 BKFEN = 0x00100000,
220 CRSEN = 0x00080000,
221 COLEN = 0x00040000,
222 THOL3 = 0x30000000,
223 THOL2 = 0x20000000,
224 THOL1 = 0x10000000,
225 THOL0 = 0x00000000,
226 /* RxDesc.status */
227 IPON = 0x20000000,
228 TCPON = 0x10000000,
229 UDPON = 0x08000000,
230 Wakup = 0x00400000,
231 Magic = 0x00200000,
232 Pause = 0x00100000,
233 DEFbit = 0x00200000,
234 BCAST = 0x000c0000,
235 MCAST = 0x00080000,
236 UCAST = 0x00040000,
237 /* RxDesc.PSize */
238 TAGON = 0x80000000,
239 RxDescCountMask = 0x7f000000, // multi-desc pkt when > 1 ? -- FR
240 ABORT = 0x00800000,
241 SHORT = 0x00400000,
242 LIMIT = 0x00200000,
243 MIIER = 0x00100000,
244 OVRUN = 0x00080000,
245 NIBON = 0x00040000,
246 COLON = 0x00020000,
247 CRCOK = 0x00010000,
248 RxSizeMask = 0x0000ffff
249 /*
250 * The asic could apparently do vlan, TSO, jumbo (sis191 only) and
251 * provide two (unused with Linux) Tx queues. No publically
252 * available documentation alas.
253 */
254 };
255
256 enum sis190_eeprom_access_register_bits {
257 EECS = 0x00000001, // unused
258 EECLK = 0x00000002, // unused
259 EEDO = 0x00000008, // unused
260 EEDI = 0x00000004, // unused
261 EEREQ = 0x00000080,
262 EEROP = 0x00000200,
263 EEWOP = 0x00000100 // unused
264 };
265
266 /* EEPROM Addresses */
267 enum sis190_eeprom_address {
268 EEPROMSignature = 0x00,
269 EEPROMCLK = 0x01, // unused
270 EEPROMInfo = 0x02,
271 EEPROMMACAddr = 0x03
272 };
273
274 enum sis190_feature {
275 F_HAS_RGMII = 1,
276 F_PHY_88E1111 = 2,
277 F_PHY_BCM5461 = 4
278 };
279
280 struct sis190_private {
281 void __iomem *mmio_addr;
282 struct pci_dev *pci_dev;
283 struct net_device_stats stats;
284 spinlock_t lock;
285 u32 rx_buf_sz;
286 u32 cur_rx;
287 u32 cur_tx;
288 u32 dirty_rx;
289 u32 dirty_tx;
290 dma_addr_t rx_dma;
291 dma_addr_t tx_dma;
292 struct RxDesc *RxDescRing;
293 struct TxDesc *TxDescRing;
294 struct sk_buff *Rx_skbuff[NUM_RX_DESC];
295 struct sk_buff *Tx_skbuff[NUM_TX_DESC];
296 struct work_struct phy_task;
297 struct timer_list timer;
298 u32 msg_enable;
299 struct mii_if_info mii_if;
300 struct list_head first_phy;
301 u32 features;
302 };
303
304 struct sis190_phy {
305 struct list_head list;
306 int phy_id;
307 u16 id[2];
308 u16 status;
309 u8 type;
310 };
311
312 enum sis190_phy_type {
313 UNKNOWN = 0x00,
314 HOME = 0x01,
315 LAN = 0x02,
316 MIX = 0x03
317 };
318
319 static struct mii_chip_info {
320 const char *name;
321 u16 id[2];
322 unsigned int type;
323 u32 feature;
324 } mii_chip_table[] = {
325 { "Broadcom PHY BCM5461", { 0x0020, 0x60c0 }, LAN, F_PHY_BCM5461 },
326 { "Agere PHY ET1101B", { 0x0282, 0xf010 }, LAN, 0 },
327 { "Marvell PHY 88E1111", { 0x0141, 0x0cc0 }, LAN, F_PHY_88E1111 },
328 { "Realtek PHY RTL8201", { 0x0000, 0x8200 }, LAN, 0 },
329 { NULL, }
330 };
331
332 static const struct {
333 const char *name;
334 } sis_chip_info[] = {
335 { "SiS 190 PCI Fast Ethernet adapter" },
336 { "SiS 191 PCI Gigabit Ethernet adapter" },
337 };
338
339 static struct pci_device_id sis190_pci_tbl[] __devinitdata = {
340 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0190), 0, 0, 0 },
341 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0191), 0, 0, 1 },
342 { 0, },
343 };
344
345 MODULE_DEVICE_TABLE(pci, sis190_pci_tbl);
346
347 static int rx_copybreak = 200;
348
349 static struct {
350 u32 msg_enable;
351 } debug = { -1 };
352
353 MODULE_DESCRIPTION("SiS sis190 Gigabit Ethernet driver");
354 module_param(rx_copybreak, int, 0);
355 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
356 module_param_named(debug, debug.msg_enable, int, 0);
357 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
358 MODULE_AUTHOR("K.M. Liu <kmliu@sis.com>, Ueimor <romieu@fr.zoreil.com>");
359 MODULE_VERSION(DRV_VERSION);
360 MODULE_LICENSE("GPL");
361
362 static const u32 sis190_intr_mask =
363 RxQEmpty | RxQInt | TxQ1Int | TxQ0Int | RxHalt | TxHalt | LinkChange;
364
365 /*
366 * Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
367 * The chips use a 64 element hash table based on the Ethernet CRC.
368 */
369 static const int multicast_filter_limit = 32;
370
371 static void __mdio_cmd(void __iomem *ioaddr, u32 ctl)
372 {
373 unsigned int i;
374
375 SIS_W32(GMIIControl, ctl);
376
377 msleep(1);
378
379 for (i = 0; i < 100; i++) {
380 if (!(SIS_R32(GMIIControl) & EhnMIInotDone))
381 break;
382 msleep(1);
383 }
384
385 if (i > 999)
386 printk(KERN_ERR PFX "PHY command failed !\n");
387 }
388
389 static void mdio_write(void __iomem *ioaddr, int phy_id, int reg, int val)
390 {
391 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIwrite |
392 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift) |
393 (((u32) val) << EhnMIIdataShift));
394 }
395
396 static int mdio_read(void __iomem *ioaddr, int phy_id, int reg)
397 {
398 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIread |
399 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift));
400
401 return (u16) (SIS_R32(GMIIControl) >> EhnMIIdataShift);
402 }
403
404 static void __mdio_write(struct net_device *dev, int phy_id, int reg, int val)
405 {
406 struct sis190_private *tp = netdev_priv(dev);
407
408 mdio_write(tp->mmio_addr, phy_id, reg, val);
409 }
410
411 static int __mdio_read(struct net_device *dev, int phy_id, int reg)
412 {
413 struct sis190_private *tp = netdev_priv(dev);
414
415 return mdio_read(tp->mmio_addr, phy_id, reg);
416 }
417
418 static u16 mdio_read_latched(void __iomem *ioaddr, int phy_id, int reg)
419 {
420 mdio_read(ioaddr, phy_id, reg);
421 return mdio_read(ioaddr, phy_id, reg);
422 }
423
424 static u16 __devinit sis190_read_eeprom(void __iomem *ioaddr, u32 reg)
425 {
426 u16 data = 0xffff;
427 unsigned int i;
428
429 if (!(SIS_R32(ROMControl) & 0x0002))
430 return 0;
431
432 SIS_W32(ROMInterface, EEREQ | EEROP | (reg << 10));
433
434 for (i = 0; i < 200; i++) {
435 if (!(SIS_R32(ROMInterface) & EEREQ)) {
436 data = (SIS_R32(ROMInterface) & 0xffff0000) >> 16;
437 break;
438 }
439 msleep(1);
440 }
441
442 return data;
443 }
444
445 static void sis190_irq_mask_and_ack(void __iomem *ioaddr)
446 {
447 SIS_W32(IntrMask, 0x00);
448 SIS_W32(IntrStatus, 0xffffffff);
449 SIS_PCI_COMMIT();
450 }
451
452 static void sis190_asic_down(void __iomem *ioaddr)
453 {
454 /* Stop the chip's Tx and Rx DMA processes. */
455
456 SIS_W32(TxControl, 0x1a00);
457 SIS_W32(RxControl, 0x1a00);
458
459 sis190_irq_mask_and_ack(ioaddr);
460 }
461
462 static void sis190_mark_as_last_descriptor(struct RxDesc *desc)
463 {
464 desc->size |= cpu_to_le32(RingEnd);
465 }
466
467 static inline void sis190_give_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
468 {
469 u32 eor = le32_to_cpu(desc->size) & RingEnd;
470
471 desc->PSize = 0x0;
472 desc->size = cpu_to_le32((rx_buf_sz & RX_BUF_MASK) | eor);
473 wmb();
474 desc->status = cpu_to_le32(OWNbit | INTbit);
475 }
476
477 static inline void sis190_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
478 u32 rx_buf_sz)
479 {
480 desc->addr = cpu_to_le32(mapping);
481 sis190_give_to_asic(desc, rx_buf_sz);
482 }
483
484 static inline void sis190_make_unusable_by_asic(struct RxDesc *desc)
485 {
486 desc->PSize = 0x0;
487 desc->addr = 0xdeadbeef;
488 desc->size &= cpu_to_le32(RingEnd);
489 wmb();
490 desc->status = 0x0;
491 }
492
493 static int sis190_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
494 struct RxDesc *desc, u32 rx_buf_sz)
495 {
496 struct sk_buff *skb;
497 dma_addr_t mapping;
498 int ret = 0;
499
500 skb = dev_alloc_skb(rx_buf_sz);
501 if (!skb)
502 goto err_out;
503
504 *sk_buff = skb;
505
506 mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
507 PCI_DMA_FROMDEVICE);
508
509 sis190_map_to_asic(desc, mapping, rx_buf_sz);
510 out:
511 return ret;
512
513 err_out:
514 ret = -ENOMEM;
515 sis190_make_unusable_by_asic(desc);
516 goto out;
517 }
518
519 static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
520 u32 start, u32 end)
521 {
522 u32 cur;
523
524 for (cur = start; cur < end; cur++) {
525 int ret, i = cur % NUM_RX_DESC;
526
527 if (tp->Rx_skbuff[i])
528 continue;
529
530 ret = sis190_alloc_rx_skb(tp->pci_dev, tp->Rx_skbuff + i,
531 tp->RxDescRing + i, tp->rx_buf_sz);
532 if (ret < 0)
533 break;
534 }
535 return cur - start;
536 }
537
538 static inline int sis190_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
539 struct RxDesc *desc, int rx_buf_sz)
540 {
541 int ret = -1;
542
543 if (pkt_size < rx_copybreak) {
544 struct sk_buff *skb;
545
546 skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN);
547 if (skb) {
548 skb_reserve(skb, NET_IP_ALIGN);
549 eth_copy_and_sum(skb, sk_buff[0]->data, pkt_size, 0);
550 *sk_buff = skb;
551 sis190_give_to_asic(desc, rx_buf_sz);
552 ret = 0;
553 }
554 }
555 return ret;
556 }
557
558 static inline int sis190_rx_pkt_err(u32 status, struct net_device_stats *stats)
559 {
560 #define ErrMask (OVRUN | SHORT | LIMIT | MIIER | NIBON | COLON | ABORT)
561
562 if ((status & CRCOK) && !(status & ErrMask))
563 return 0;
564
565 if (!(status & CRCOK))
566 stats->rx_crc_errors++;
567 else if (status & OVRUN)
568 stats->rx_over_errors++;
569 else if (status & (SHORT | LIMIT))
570 stats->rx_length_errors++;
571 else if (status & (MIIER | NIBON | COLON))
572 stats->rx_frame_errors++;
573
574 stats->rx_errors++;
575 return -1;
576 }
577
578 static int sis190_rx_interrupt(struct net_device *dev,
579 struct sis190_private *tp, void __iomem *ioaddr)
580 {
581 struct net_device_stats *stats = &tp->stats;
582 u32 rx_left, cur_rx = tp->cur_rx;
583 u32 delta, count;
584
585 rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
586 rx_left = sis190_rx_quota(rx_left, (u32) dev->quota);
587
588 for (; rx_left > 0; rx_left--, cur_rx++) {
589 unsigned int entry = cur_rx % NUM_RX_DESC;
590 struct RxDesc *desc = tp->RxDescRing + entry;
591 u32 status;
592
593 if (desc->status & OWNbit)
594 break;
595
596 status = le32_to_cpu(desc->PSize);
597
598 // net_intr(tp, KERN_INFO "%s: Rx PSize = %08x.\n", dev->name,
599 // status);
600
601 if (sis190_rx_pkt_err(status, stats) < 0)
602 sis190_give_to_asic(desc, tp->rx_buf_sz);
603 else {
604 struct sk_buff *skb = tp->Rx_skbuff[entry];
605 int pkt_size = (status & RxSizeMask) - 4;
606 void (*pci_action)(struct pci_dev *, dma_addr_t,
607 size_t, int) = pci_dma_sync_single_for_device;
608
609 if (unlikely(pkt_size > tp->rx_buf_sz)) {
610 net_intr(tp, KERN_INFO
611 "%s: (frag) status = %08x.\n",
612 dev->name, status);
613 stats->rx_dropped++;
614 stats->rx_length_errors++;
615 sis190_give_to_asic(desc, tp->rx_buf_sz);
616 continue;
617 }
618
619 pci_dma_sync_single_for_cpu(tp->pci_dev,
620 le32_to_cpu(desc->addr), tp->rx_buf_sz,
621 PCI_DMA_FROMDEVICE);
622
623 if (sis190_try_rx_copy(&skb, pkt_size, desc,
624 tp->rx_buf_sz)) {
625 pci_action = pci_unmap_single;
626 tp->Rx_skbuff[entry] = NULL;
627 sis190_make_unusable_by_asic(desc);
628 }
629
630 pci_action(tp->pci_dev, le32_to_cpu(desc->addr),
631 tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
632
633 skb->dev = dev;
634 skb_put(skb, pkt_size);
635 skb->protocol = eth_type_trans(skb, dev);
636
637 sis190_rx_skb(skb);
638
639 dev->last_rx = jiffies;
640 stats->rx_packets++;
641 stats->rx_bytes += pkt_size;
642 if ((status & BCAST) == MCAST)
643 stats->multicast++;
644 }
645 }
646 count = cur_rx - tp->cur_rx;
647 tp->cur_rx = cur_rx;
648
649 delta = sis190_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
650 if (!delta && count && netif_msg_intr(tp))
651 printk(KERN_INFO "%s: no Rx buffer allocated.\n", dev->name);
652 tp->dirty_rx += delta;
653
654 if (((tp->dirty_rx + NUM_RX_DESC) == tp->cur_rx) && netif_msg_intr(tp))
655 printk(KERN_EMERG "%s: Rx buffers exhausted.\n", dev->name);
656
657 return count;
658 }
659
660 static void sis190_unmap_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
661 struct TxDesc *desc)
662 {
663 unsigned int len;
664
665 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
666
667 pci_unmap_single(pdev, le32_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
668
669 memset(desc, 0x00, sizeof(*desc));
670 }
671
672 static void sis190_tx_interrupt(struct net_device *dev,
673 struct sis190_private *tp, void __iomem *ioaddr)
674 {
675 u32 pending, dirty_tx = tp->dirty_tx;
676 /*
677 * It would not be needed if queueing was allowed to be enabled
678 * again too early (hint: think preempt and unclocked smp systems).
679 */
680 unsigned int queue_stopped;
681
682 smp_rmb();
683 pending = tp->cur_tx - dirty_tx;
684 queue_stopped = (pending == NUM_TX_DESC);
685
686 for (; pending; pending--, dirty_tx++) {
687 unsigned int entry = dirty_tx % NUM_TX_DESC;
688 struct TxDesc *txd = tp->TxDescRing + entry;
689 struct sk_buff *skb;
690
691 if (le32_to_cpu(txd->status) & OWNbit)
692 break;
693
694 skb = tp->Tx_skbuff[entry];
695
696 tp->stats.tx_packets++;
697 tp->stats.tx_bytes += skb->len;
698
699 sis190_unmap_tx_skb(tp->pci_dev, skb, txd);
700 tp->Tx_skbuff[entry] = NULL;
701 dev_kfree_skb_irq(skb);
702 }
703
704 if (tp->dirty_tx != dirty_tx) {
705 tp->dirty_tx = dirty_tx;
706 smp_wmb();
707 if (queue_stopped)
708 netif_wake_queue(dev);
709 }
710 }
711
712 /*
713 * The interrupt handler does all of the Rx thread work and cleans up after
714 * the Tx thread.
715 */
716 static irqreturn_t sis190_interrupt(int irq, void *__dev, struct pt_regs *regs)
717 {
718 struct net_device *dev = __dev;
719 struct sis190_private *tp = netdev_priv(dev);
720 void __iomem *ioaddr = tp->mmio_addr;
721 unsigned int handled = 0;
722 u32 status;
723
724 status = SIS_R32(IntrStatus);
725
726 if ((status == 0xffffffff) || !status)
727 goto out;
728
729 handled = 1;
730
731 if (unlikely(!netif_running(dev))) {
732 sis190_asic_down(ioaddr);
733 goto out;
734 }
735
736 SIS_W32(IntrStatus, status);
737
738 // net_intr(tp, KERN_INFO "%s: status = %08x.\n", dev->name, status);
739
740 if (status & LinkChange) {
741 net_intr(tp, KERN_INFO "%s: link change.\n", dev->name);
742 schedule_work(&tp->phy_task);
743 }
744
745 if (status & RxQInt)
746 sis190_rx_interrupt(dev, tp, ioaddr);
747
748 if (status & TxQ0Int)
749 sis190_tx_interrupt(dev, tp, ioaddr);
750 out:
751 return IRQ_RETVAL(handled);
752 }
753
754 #ifdef CONFIG_NET_POLL_CONTROLLER
755 static void sis190_netpoll(struct net_device *dev)
756 {
757 struct sis190_private *tp = netdev_priv(dev);
758 struct pci_dev *pdev = tp->pci_dev;
759
760 disable_irq(pdev->irq);
761 sis190_interrupt(pdev->irq, dev, NULL);
762 enable_irq(pdev->irq);
763 }
764 #endif
765
766 static void sis190_free_rx_skb(struct sis190_private *tp,
767 struct sk_buff **sk_buff, struct RxDesc *desc)
768 {
769 struct pci_dev *pdev = tp->pci_dev;
770
771 pci_unmap_single(pdev, le32_to_cpu(desc->addr), tp->rx_buf_sz,
772 PCI_DMA_FROMDEVICE);
773 dev_kfree_skb(*sk_buff);
774 *sk_buff = NULL;
775 sis190_make_unusable_by_asic(desc);
776 }
777
778 static void sis190_rx_clear(struct sis190_private *tp)
779 {
780 unsigned int i;
781
782 for (i = 0; i < NUM_RX_DESC; i++) {
783 if (!tp->Rx_skbuff[i])
784 continue;
785 sis190_free_rx_skb(tp, tp->Rx_skbuff + i, tp->RxDescRing + i);
786 }
787 }
788
789 static void sis190_init_ring_indexes(struct sis190_private *tp)
790 {
791 tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
792 }
793
794 static int sis190_init_ring(struct net_device *dev)
795 {
796 struct sis190_private *tp = netdev_priv(dev);
797
798 sis190_init_ring_indexes(tp);
799
800 memset(tp->Tx_skbuff, 0x0, NUM_TX_DESC * sizeof(struct sk_buff *));
801 memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
802
803 if (sis190_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
804 goto err_rx_clear;
805
806 sis190_mark_as_last_descriptor(tp->RxDescRing + NUM_RX_DESC - 1);
807
808 return 0;
809
810 err_rx_clear:
811 sis190_rx_clear(tp);
812 return -ENOMEM;
813 }
814
815 static void sis190_set_rx_mode(struct net_device *dev)
816 {
817 struct sis190_private *tp = netdev_priv(dev);
818 void __iomem *ioaddr = tp->mmio_addr;
819 unsigned long flags;
820 u32 mc_filter[2]; /* Multicast hash filter */
821 u16 rx_mode;
822
823 if (dev->flags & IFF_PROMISC) {
824 /* Unconditionally log net taps. */
825 net_drv(tp, KERN_NOTICE "%s: Promiscuous mode enabled.\n",
826 dev->name);
827 rx_mode =
828 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
829 AcceptAllPhys;
830 mc_filter[1] = mc_filter[0] = 0xffffffff;
831 } else if ((dev->mc_count > multicast_filter_limit) ||
832 (dev->flags & IFF_ALLMULTI)) {
833 /* Too many to filter perfectly -- accept all multicasts. */
834 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
835 mc_filter[1] = mc_filter[0] = 0xffffffff;
836 } else {
837 struct dev_mc_list *mclist;
838 unsigned int i;
839
840 rx_mode = AcceptBroadcast | AcceptMyPhys;
841 mc_filter[1] = mc_filter[0] = 0;
842 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
843 i++, mclist = mclist->next) {
844 int bit_nr =
845 ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3f;
846 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
847 rx_mode |= AcceptMulticast;
848 }
849 }
850
851 spin_lock_irqsave(&tp->lock, flags);
852
853 SIS_W16(RxMacControl, rx_mode | 0x2);
854 SIS_W32(RxHashTable, mc_filter[0]);
855 SIS_W32(RxHashTable + 4, mc_filter[1]);
856
857 spin_unlock_irqrestore(&tp->lock, flags);
858 }
859
860 static void sis190_soft_reset(void __iomem *ioaddr)
861 {
862 SIS_W32(IntrControl, 0x8000);
863 SIS_PCI_COMMIT();
864 msleep(1);
865 SIS_W32(IntrControl, 0x0);
866 sis190_asic_down(ioaddr);
867 msleep(1);
868 }
869
870 static void sis190_hw_start(struct net_device *dev)
871 {
872 struct sis190_private *tp = netdev_priv(dev);
873 void __iomem *ioaddr = tp->mmio_addr;
874
875 sis190_soft_reset(ioaddr);
876
877 SIS_W32(TxDescStartAddr, tp->tx_dma);
878 SIS_W32(RxDescStartAddr, tp->rx_dma);
879
880 SIS_W32(IntrStatus, 0xffffffff);
881 SIS_W32(IntrMask, 0x0);
882 SIS_W32(GMIIControl, 0x0);
883 SIS_W32(TxMacControl, 0x60);
884 SIS_W16(RxMacControl, 0x02);
885 SIS_W32(RxHashTable, 0x0);
886 SIS_W32(0x6c, 0x0);
887 SIS_W32(RxWolCtrl, 0x0);
888 SIS_W32(RxWolData, 0x0);
889
890 SIS_PCI_COMMIT();
891
892 sis190_set_rx_mode(dev);
893
894 /* Enable all known interrupts by setting the interrupt mask. */
895 SIS_W32(IntrMask, sis190_intr_mask);
896
897 SIS_W32(TxControl, 0x1a00 | CmdTxEnb);
898 SIS_W32(RxControl, 0x1a1d);
899
900 netif_start_queue(dev);
901 }
902
903 static void sis190_phy_task(void * data)
904 {
905 struct net_device *dev = data;
906 struct sis190_private *tp = netdev_priv(dev);
907 void __iomem *ioaddr = tp->mmio_addr;
908 int phy_id = tp->mii_if.phy_id;
909 u16 val;
910
911 rtnl_lock();
912
913 val = mdio_read(ioaddr, phy_id, MII_BMCR);
914 if (val & BMCR_RESET) {
915 // FIXME: needlessly high ? -- FR 02/07/2005
916 mod_timer(&tp->timer, jiffies + HZ/10);
917 } else if (!(mdio_read_latched(ioaddr, phy_id, MII_BMSR) &
918 BMSR_ANEGCOMPLETE)) {
919 net_link(tp, KERN_WARNING "%s: PHY reset until link up.\n",
920 dev->name);
921 netif_carrier_off(dev);
922 mdio_write(ioaddr, phy_id, MII_BMCR, val | BMCR_RESET);
923 mod_timer(&tp->timer, jiffies + SIS190_PHY_TIMEOUT);
924 } else {
925 /* Rejoice ! */
926 struct {
927 int val;
928 u32 ctl;
929 const char *msg;
930 } reg31[] = {
931 { LPA_1000XFULL | LPA_SLCT, 0x07000c00 | 0x00001000,
932 "1000 Mbps Full Duplex" },
933 { LPA_1000XHALF | LPA_SLCT, 0x07000c00,
934 "1000 Mbps Half Duplex" },
935 { LPA_100FULL, 0x04000800 | 0x00001000,
936 "100 Mbps Full Duplex" },
937 { LPA_100HALF, 0x04000800,
938 "100 Mbps Half Duplex" },
939 { LPA_10FULL, 0x04000400 | 0x00001000,
940 "10 Mbps Full Duplex" },
941 { LPA_10HALF, 0x04000400,
942 "10 Mbps Half Duplex" },
943 { 0, 0x04000400, "unknown" }
944 }, *p;
945 u16 adv;
946
947 val = mdio_read(ioaddr, phy_id, 0x1f);
948 net_link(tp, KERN_INFO "%s: mii ext = %04x.\n", dev->name, val);
949
950 val = mdio_read(ioaddr, phy_id, MII_LPA);
951 adv = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
952 net_link(tp, KERN_INFO "%s: mii lpa = %04x adv = %04x.\n",
953 dev->name, val, adv);
954
955 val &= adv;
956
957 for (p = reg31; p->val; p++) {
958 if ((val & p->val) == p->val)
959 break;
960 }
961
962 p->ctl |= SIS_R32(StationControl) & ~0x0f001c00;
963
964 if ((tp->features & F_HAS_RGMII) &&
965 (tp->features & F_PHY_BCM5461)) {
966 // Set Tx Delay in RGMII mode.
967 mdio_write(ioaddr, phy_id, 0x18, 0xf1c7);
968 udelay(200);
969 mdio_write(ioaddr, phy_id, 0x1c, 0x8c00);
970 p->ctl |= 0x03000000;
971 }
972
973 SIS_W32(StationControl, p->ctl);
974
975 if (tp->features & F_HAS_RGMII) {
976 SIS_W32(RGDelay, 0x0441);
977 SIS_W32(RGDelay, 0x0440);
978 }
979
980 net_link(tp, KERN_INFO "%s: link on %s mode.\n", dev->name,
981 p->msg);
982 netif_carrier_on(dev);
983 }
984
985 rtnl_unlock();
986 }
987
988 static void sis190_phy_timer(unsigned long __opaque)
989 {
990 struct net_device *dev = (struct net_device *)__opaque;
991 struct sis190_private *tp = netdev_priv(dev);
992
993 if (likely(netif_running(dev)))
994 schedule_work(&tp->phy_task);
995 }
996
997 static inline void sis190_delete_timer(struct net_device *dev)
998 {
999 struct sis190_private *tp = netdev_priv(dev);
1000
1001 del_timer_sync(&tp->timer);
1002 }
1003
1004 static inline void sis190_request_timer(struct net_device *dev)
1005 {
1006 struct sis190_private *tp = netdev_priv(dev);
1007 struct timer_list *timer = &tp->timer;
1008
1009 init_timer(timer);
1010 timer->expires = jiffies + SIS190_PHY_TIMEOUT;
1011 timer->data = (unsigned long)dev;
1012 timer->function = sis190_phy_timer;
1013 add_timer(timer);
1014 }
1015
1016 static void sis190_set_rxbufsize(struct sis190_private *tp,
1017 struct net_device *dev)
1018 {
1019 unsigned int mtu = dev->mtu;
1020
1021 tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1022 /* RxDesc->size has a licence to kill the lower bits */
1023 if (tp->rx_buf_sz & 0x07) {
1024 tp->rx_buf_sz += 8;
1025 tp->rx_buf_sz &= RX_BUF_MASK;
1026 }
1027 }
1028
1029 static int sis190_open(struct net_device *dev)
1030 {
1031 struct sis190_private *tp = netdev_priv(dev);
1032 struct pci_dev *pdev = tp->pci_dev;
1033 int rc = -ENOMEM;
1034
1035 sis190_set_rxbufsize(tp, dev);
1036
1037 /*
1038 * Rx and Tx descriptors need 256 bytes alignment.
1039 * pci_alloc_consistent() guarantees a stronger alignment.
1040 */
1041 tp->TxDescRing = pci_alloc_consistent(pdev, TX_RING_BYTES, &tp->tx_dma);
1042 if (!tp->TxDescRing)
1043 goto out;
1044
1045 tp->RxDescRing = pci_alloc_consistent(pdev, RX_RING_BYTES, &tp->rx_dma);
1046 if (!tp->RxDescRing)
1047 goto err_free_tx_0;
1048
1049 rc = sis190_init_ring(dev);
1050 if (rc < 0)
1051 goto err_free_rx_1;
1052
1053 INIT_WORK(&tp->phy_task, sis190_phy_task, dev);
1054
1055 sis190_request_timer(dev);
1056
1057 rc = request_irq(dev->irq, sis190_interrupt, SA_SHIRQ, dev->name, dev);
1058 if (rc < 0)
1059 goto err_release_timer_2;
1060
1061 sis190_hw_start(dev);
1062 out:
1063 return rc;
1064
1065 err_release_timer_2:
1066 sis190_delete_timer(dev);
1067 sis190_rx_clear(tp);
1068 err_free_rx_1:
1069 pci_free_consistent(tp->pci_dev, RX_RING_BYTES, tp->RxDescRing,
1070 tp->rx_dma);
1071 err_free_tx_0:
1072 pci_free_consistent(tp->pci_dev, TX_RING_BYTES, tp->TxDescRing,
1073 tp->tx_dma);
1074 goto out;
1075 }
1076
1077 static void sis190_tx_clear(struct sis190_private *tp)
1078 {
1079 unsigned int i;
1080
1081 for (i = 0; i < NUM_TX_DESC; i++) {
1082 struct sk_buff *skb = tp->Tx_skbuff[i];
1083
1084 if (!skb)
1085 continue;
1086
1087 sis190_unmap_tx_skb(tp->pci_dev, skb, tp->TxDescRing + i);
1088 tp->Tx_skbuff[i] = NULL;
1089 dev_kfree_skb(skb);
1090
1091 tp->stats.tx_dropped++;
1092 }
1093 tp->cur_tx = tp->dirty_tx = 0;
1094 }
1095
1096 static void sis190_down(struct net_device *dev)
1097 {
1098 struct sis190_private *tp = netdev_priv(dev);
1099 void __iomem *ioaddr = tp->mmio_addr;
1100 unsigned int poll_locked = 0;
1101
1102 sis190_delete_timer(dev);
1103
1104 netif_stop_queue(dev);
1105
1106 flush_scheduled_work();
1107
1108 do {
1109 spin_lock_irq(&tp->lock);
1110
1111 sis190_asic_down(ioaddr);
1112
1113 spin_unlock_irq(&tp->lock);
1114
1115 synchronize_irq(dev->irq);
1116
1117 if (!poll_locked) {
1118 netif_poll_disable(dev);
1119 poll_locked++;
1120 }
1121
1122 synchronize_sched();
1123
1124 } while (SIS_R32(IntrMask));
1125
1126 sis190_tx_clear(tp);
1127 sis190_rx_clear(tp);
1128 }
1129
1130 static int sis190_close(struct net_device *dev)
1131 {
1132 struct sis190_private *tp = netdev_priv(dev);
1133 struct pci_dev *pdev = tp->pci_dev;
1134
1135 sis190_down(dev);
1136
1137 free_irq(dev->irq, dev);
1138
1139 netif_poll_enable(dev);
1140
1141 pci_free_consistent(pdev, TX_RING_BYTES, tp->TxDescRing, tp->tx_dma);
1142 pci_free_consistent(pdev, RX_RING_BYTES, tp->RxDescRing, tp->rx_dma);
1143
1144 tp->TxDescRing = NULL;
1145 tp->RxDescRing = NULL;
1146
1147 return 0;
1148 }
1149
1150 static int sis190_start_xmit(struct sk_buff *skb, struct net_device *dev)
1151 {
1152 struct sis190_private *tp = netdev_priv(dev);
1153 void __iomem *ioaddr = tp->mmio_addr;
1154 u32 len, entry, dirty_tx;
1155 struct TxDesc *desc;
1156 dma_addr_t mapping;
1157
1158 if (unlikely(skb->len < ETH_ZLEN)) {
1159 if (skb_padto(skb, ETH_ZLEN)) {
1160 tp->stats.tx_dropped++;
1161 goto out;
1162 }
1163 len = ETH_ZLEN;
1164 } else {
1165 len = skb->len;
1166 }
1167
1168 entry = tp->cur_tx % NUM_TX_DESC;
1169 desc = tp->TxDescRing + entry;
1170
1171 if (unlikely(le32_to_cpu(desc->status) & OWNbit)) {
1172 netif_stop_queue(dev);
1173 net_tx_err(tp, KERN_ERR PFX
1174 "%s: BUG! Tx Ring full when queue awake!\n",
1175 dev->name);
1176 return NETDEV_TX_BUSY;
1177 }
1178
1179 mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
1180
1181 tp->Tx_skbuff[entry] = skb;
1182
1183 desc->PSize = cpu_to_le32(len);
1184 desc->addr = cpu_to_le32(mapping);
1185
1186 desc->size = cpu_to_le32(len);
1187 if (entry == (NUM_TX_DESC - 1))
1188 desc->size |= cpu_to_le32(RingEnd);
1189
1190 wmb();
1191
1192 desc->status = cpu_to_le32(OWNbit | INTbit | DEFbit | CRCbit | PADbit);
1193
1194 tp->cur_tx++;
1195
1196 smp_wmb();
1197
1198 SIS_W32(TxControl, 0x1a00 | CmdReset | CmdTxEnb);
1199
1200 dev->trans_start = jiffies;
1201
1202 dirty_tx = tp->dirty_tx;
1203 if ((tp->cur_tx - NUM_TX_DESC) == dirty_tx) {
1204 netif_stop_queue(dev);
1205 smp_rmb();
1206 if (dirty_tx != tp->dirty_tx)
1207 netif_wake_queue(dev);
1208 }
1209 out:
1210 return NETDEV_TX_OK;
1211 }
1212
1213 static struct net_device_stats *sis190_get_stats(struct net_device *dev)
1214 {
1215 struct sis190_private *tp = netdev_priv(dev);
1216
1217 return &tp->stats;
1218 }
1219
1220 static void sis190_free_phy(struct list_head *first_phy)
1221 {
1222 struct sis190_phy *cur, *next;
1223
1224 list_for_each_entry_safe(cur, next, first_phy, list) {
1225 kfree(cur);
1226 }
1227 }
1228
1229 /**
1230 * sis190_default_phy - Select default PHY for sis190 mac.
1231 * @dev: the net device to probe for
1232 *
1233 * Select first detected PHY with link as default.
1234 * If no one is link on, select PHY whose types is HOME as default.
1235 * If HOME doesn't exist, select LAN.
1236 */
1237 static u16 sis190_default_phy(struct net_device *dev)
1238 {
1239 struct sis190_phy *phy, *phy_home, *phy_default, *phy_lan;
1240 struct sis190_private *tp = netdev_priv(dev);
1241 struct mii_if_info *mii_if = &tp->mii_if;
1242 void __iomem *ioaddr = tp->mmio_addr;
1243 u16 status;
1244
1245 phy_home = phy_default = phy_lan = NULL;
1246
1247 list_for_each_entry(phy, &tp->first_phy, list) {
1248 status = mdio_read_latched(ioaddr, phy->phy_id, MII_BMSR);
1249
1250 // Link ON & Not select default PHY & not ghost PHY.
1251 if ((status & BMSR_LSTATUS) &&
1252 !phy_default &&
1253 (phy->type != UNKNOWN)) {
1254 phy_default = phy;
1255 } else {
1256 status = mdio_read(ioaddr, phy->phy_id, MII_BMCR);
1257 mdio_write(ioaddr, phy->phy_id, MII_BMCR,
1258 status | BMCR_ANENABLE | BMCR_ISOLATE);
1259 if (phy->type == HOME)
1260 phy_home = phy;
1261 else if (phy->type == LAN)
1262 phy_lan = phy;
1263 }
1264 }
1265
1266 if (!phy_default) {
1267 if (phy_home)
1268 phy_default = phy_home;
1269 else if (phy_lan)
1270 phy_default = phy_lan;
1271 else
1272 phy_default = list_entry(&tp->first_phy,
1273 struct sis190_phy, list);
1274 }
1275
1276 if (mii_if->phy_id != phy_default->phy_id) {
1277 mii_if->phy_id = phy_default->phy_id;
1278 net_probe(tp, KERN_INFO
1279 "%s: Using transceiver at address %d as default.\n",
1280 pci_name(tp->pci_dev), mii_if->phy_id);
1281 }
1282
1283 status = mdio_read(ioaddr, mii_if->phy_id, MII_BMCR);
1284 status &= (~BMCR_ISOLATE);
1285
1286 mdio_write(ioaddr, mii_if->phy_id, MII_BMCR, status);
1287 status = mdio_read_latched(ioaddr, mii_if->phy_id, MII_BMSR);
1288
1289 return status;
1290 }
1291
1292 static void sis190_init_phy(struct net_device *dev, struct sis190_private *tp,
1293 struct sis190_phy *phy, unsigned int phy_id,
1294 u16 mii_status)
1295 {
1296 void __iomem *ioaddr = tp->mmio_addr;
1297 struct mii_chip_info *p;
1298
1299 INIT_LIST_HEAD(&phy->list);
1300 phy->status = mii_status;
1301 phy->phy_id = phy_id;
1302
1303 phy->id[0] = mdio_read(ioaddr, phy_id, MII_PHYSID1);
1304 phy->id[1] = mdio_read(ioaddr, phy_id, MII_PHYSID2);
1305
1306 for (p = mii_chip_table; p->type; p++) {
1307 if ((p->id[0] == phy->id[0]) &&
1308 (p->id[1] == (phy->id[1] & 0xfff0))) {
1309 break;
1310 }
1311 }
1312
1313 if (p->id[1]) {
1314 phy->type = (p->type == MIX) ?
1315 ((mii_status & (BMSR_100FULL | BMSR_100HALF)) ?
1316 LAN : HOME) : p->type;
1317 tp->features |= p->feature;
1318 } else
1319 phy->type = UNKNOWN;
1320
1321 net_probe(tp, KERN_INFO "%s: %s transceiver at address %d.\n",
1322 pci_name(tp->pci_dev),
1323 (phy->type == UNKNOWN) ? "Unknown PHY" : p->name, phy_id);
1324 }
1325
1326 static void sis190_mii_probe_88e1111_fixup(struct sis190_private *tp)
1327 {
1328 if (tp->features & F_PHY_88E1111) {
1329 void __iomem *ioaddr = tp->mmio_addr;
1330 int phy_id = tp->mii_if.phy_id;
1331 u16 reg[2][2] = {
1332 { 0x808b, 0x0ce1 },
1333 { 0x808f, 0x0c60 }
1334 }, *p;
1335
1336 p = (tp->features & F_HAS_RGMII) ? reg[0] : reg[1];
1337
1338 mdio_write(ioaddr, phy_id, 0x1b, p[0]);
1339 udelay(200);
1340 mdio_write(ioaddr, phy_id, 0x14, p[1]);
1341 udelay(200);
1342 }
1343 }
1344
1345 /**
1346 * sis190_mii_probe - Probe MII PHY for sis190
1347 * @dev: the net device to probe for
1348 *
1349 * Search for total of 32 possible mii phy addresses.
1350 * Identify and set current phy if found one,
1351 * return error if it failed to found.
1352 */
1353 static int __devinit sis190_mii_probe(struct net_device *dev)
1354 {
1355 struct sis190_private *tp = netdev_priv(dev);
1356 struct mii_if_info *mii_if = &tp->mii_if;
1357 void __iomem *ioaddr = tp->mmio_addr;
1358 int phy_id;
1359 int rc = 0;
1360
1361 INIT_LIST_HEAD(&tp->first_phy);
1362
1363 for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
1364 struct sis190_phy *phy;
1365 u16 status;
1366
1367 status = mdio_read_latched(ioaddr, phy_id, MII_BMSR);
1368
1369 // Try next mii if the current one is not accessible.
1370 if (status == 0xffff || status == 0x0000)
1371 continue;
1372
1373 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
1374 if (!phy) {
1375 sis190_free_phy(&tp->first_phy);
1376 rc = -ENOMEM;
1377 goto out;
1378 }
1379
1380 sis190_init_phy(dev, tp, phy, phy_id, status);
1381
1382 list_add(&tp->first_phy, &phy->list);
1383 }
1384
1385 if (list_empty(&tp->first_phy)) {
1386 net_probe(tp, KERN_INFO "%s: No MII transceivers found!\n",
1387 pci_name(tp->pci_dev));
1388 rc = -EIO;
1389 goto out;
1390 }
1391
1392 /* Select default PHY for mac */
1393 sis190_default_phy(dev);
1394
1395 sis190_mii_probe_88e1111_fixup(tp);
1396
1397 mii_if->dev = dev;
1398 mii_if->mdio_read = __mdio_read;
1399 mii_if->mdio_write = __mdio_write;
1400 mii_if->phy_id_mask = PHY_ID_ANY;
1401 mii_if->reg_num_mask = MII_REG_ANY;
1402 out:
1403 return rc;
1404 }
1405
1406 static void __devexit sis190_mii_remove(struct net_device *dev)
1407 {
1408 struct sis190_private *tp = netdev_priv(dev);
1409
1410 sis190_free_phy(&tp->first_phy);
1411 }
1412
1413 static void sis190_release_board(struct pci_dev *pdev)
1414 {
1415 struct net_device *dev = pci_get_drvdata(pdev);
1416 struct sis190_private *tp = netdev_priv(dev);
1417
1418 iounmap(tp->mmio_addr);
1419 pci_release_regions(pdev);
1420 pci_disable_device(pdev);
1421 free_netdev(dev);
1422 }
1423
1424 static struct net_device * __devinit sis190_init_board(struct pci_dev *pdev)
1425 {
1426 struct sis190_private *tp;
1427 struct net_device *dev;
1428 void __iomem *ioaddr;
1429 int rc;
1430
1431 dev = alloc_etherdev(sizeof(*tp));
1432 if (!dev) {
1433 net_drv(&debug, KERN_ERR PFX "unable to alloc new ethernet\n");
1434 rc = -ENOMEM;
1435 goto err_out_0;
1436 }
1437
1438 SET_MODULE_OWNER(dev);
1439 SET_NETDEV_DEV(dev, &pdev->dev);
1440
1441 tp = netdev_priv(dev);
1442 tp->msg_enable = netif_msg_init(debug.msg_enable, SIS190_MSG_DEFAULT);
1443
1444 rc = pci_enable_device(pdev);
1445 if (rc < 0) {
1446 net_probe(tp, KERN_ERR "%s: enable failure\n", pci_name(pdev));
1447 goto err_free_dev_1;
1448 }
1449
1450 rc = -ENODEV;
1451
1452 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1453 net_probe(tp, KERN_ERR "%s: region #0 is no MMIO resource.\n",
1454 pci_name(pdev));
1455 goto err_pci_disable_2;
1456 }
1457 if (pci_resource_len(pdev, 0) < SIS190_REGS_SIZE) {
1458 net_probe(tp, KERN_ERR "%s: invalid PCI region size(s).\n",
1459 pci_name(pdev));
1460 goto err_pci_disable_2;
1461 }
1462
1463 rc = pci_request_regions(pdev, DRV_NAME);
1464 if (rc < 0) {
1465 net_probe(tp, KERN_ERR PFX "%s: could not request regions.\n",
1466 pci_name(pdev));
1467 goto err_pci_disable_2;
1468 }
1469
1470 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1471 if (rc < 0) {
1472 net_probe(tp, KERN_ERR "%s: DMA configuration failed.\n",
1473 pci_name(pdev));
1474 goto err_free_res_3;
1475 }
1476
1477 pci_set_master(pdev);
1478
1479 ioaddr = ioremap(pci_resource_start(pdev, 0), SIS190_REGS_SIZE);
1480 if (!ioaddr) {
1481 net_probe(tp, KERN_ERR "%s: cannot remap MMIO, aborting\n",
1482 pci_name(pdev));
1483 rc = -EIO;
1484 goto err_free_res_3;
1485 }
1486
1487 tp->pci_dev = pdev;
1488 tp->mmio_addr = ioaddr;
1489
1490 sis190_irq_mask_and_ack(ioaddr);
1491
1492 sis190_soft_reset(ioaddr);
1493 out:
1494 return dev;
1495
1496 err_free_res_3:
1497 pci_release_regions(pdev);
1498 err_pci_disable_2:
1499 pci_disable_device(pdev);
1500 err_free_dev_1:
1501 free_netdev(dev);
1502 err_out_0:
1503 dev = ERR_PTR(rc);
1504 goto out;
1505 }
1506
1507 static void sis190_tx_timeout(struct net_device *dev)
1508 {
1509 struct sis190_private *tp = netdev_priv(dev);
1510 void __iomem *ioaddr = tp->mmio_addr;
1511 u8 tmp8;
1512
1513 /* Disable Tx, if not already */
1514 tmp8 = SIS_R8(TxControl);
1515 if (tmp8 & CmdTxEnb)
1516 SIS_W8(TxControl, tmp8 & ~CmdTxEnb);
1517
1518
1519 net_tx_err(tp, KERN_INFO "%s: Transmit timeout, status %08x %08x.\n",
1520 dev->name, SIS_R32(TxControl), SIS_R32(TxSts));
1521
1522 /* Disable interrupts by clearing the interrupt mask. */
1523 SIS_W32(IntrMask, 0x0000);
1524
1525 /* Stop a shared interrupt from scavenging while we are. */
1526 spin_lock_irq(&tp->lock);
1527 sis190_tx_clear(tp);
1528 spin_unlock_irq(&tp->lock);
1529
1530 /* ...and finally, reset everything. */
1531 sis190_hw_start(dev);
1532
1533 netif_wake_queue(dev);
1534 }
1535
1536 static void sis190_set_rgmii(struct sis190_private *tp, u8 reg)
1537 {
1538 tp->features |= (reg & 0x80) ? F_HAS_RGMII : 0;
1539 }
1540
1541 static int __devinit sis190_get_mac_addr_from_eeprom(struct pci_dev *pdev,
1542 struct net_device *dev)
1543 {
1544 struct sis190_private *tp = netdev_priv(dev);
1545 void __iomem *ioaddr = tp->mmio_addr;
1546 u16 sig;
1547 int i;
1548
1549 net_probe(tp, KERN_INFO "%s: Read MAC address from EEPROM\n",
1550 pci_name(pdev));
1551
1552 /* Check to see if there is a sane EEPROM */
1553 sig = (u16) sis190_read_eeprom(ioaddr, EEPROMSignature);
1554
1555 if ((sig == 0xffff) || (sig == 0x0000)) {
1556 net_probe(tp, KERN_INFO "%s: Error EEPROM read %x.\n",
1557 pci_name(pdev), sig);
1558 return -EIO;
1559 }
1560
1561 /* Get MAC address from EEPROM */
1562 for (i = 0; i < MAC_ADDR_LEN / 2; i++) {
1563 __le16 w = sis190_read_eeprom(ioaddr, EEPROMMACAddr + i);
1564
1565 ((u16 *)dev->dev_addr)[0] = le16_to_cpu(w);
1566 }
1567
1568 sis190_set_rgmii(tp, sis190_read_eeprom(ioaddr, EEPROMInfo));
1569
1570 return 0;
1571 }
1572
1573 /**
1574 * sis190_get_mac_addr_from_apc - Get MAC address for SiS965 model
1575 * @pdev: PCI device
1576 * @dev: network device to get address for
1577 *
1578 * SiS965 model, use APC CMOS RAM to store MAC address.
1579 * APC CMOS RAM is accessed through ISA bridge.
1580 * MAC address is read into @net_dev->dev_addr.
1581 */
1582 static int __devinit sis190_get_mac_addr_from_apc(struct pci_dev *pdev,
1583 struct net_device *dev)
1584 {
1585 struct sis190_private *tp = netdev_priv(dev);
1586 struct pci_dev *isa_bridge;
1587 u8 reg, tmp8;
1588 int i;
1589
1590 net_probe(tp, KERN_INFO "%s: Read MAC address from APC.\n",
1591 pci_name(pdev));
1592
1593 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, 0x0965, NULL);
1594 if (!isa_bridge) {
1595 net_probe(tp, KERN_INFO "%s: Can not find ISA bridge.\n",
1596 pci_name(pdev));
1597 return -EIO;
1598 }
1599
1600 /* Enable port 78h & 79h to access APC Registers. */
1601 pci_read_config_byte(isa_bridge, 0x48, &tmp8);
1602 reg = (tmp8 & ~0x02);
1603 pci_write_config_byte(isa_bridge, 0x48, reg);
1604 udelay(50);
1605 pci_read_config_byte(isa_bridge, 0x48, &reg);
1606
1607 for (i = 0; i < MAC_ADDR_LEN; i++) {
1608 outb(0x9 + i, 0x78);
1609 dev->dev_addr[i] = inb(0x79);
1610 }
1611
1612 outb(0x12, 0x78);
1613 reg = inb(0x79);
1614
1615 sis190_set_rgmii(tp, reg);
1616
1617 /* Restore the value to ISA Bridge */
1618 pci_write_config_byte(isa_bridge, 0x48, tmp8);
1619 pci_dev_put(isa_bridge);
1620
1621 return 0;
1622 }
1623
1624 /**
1625 * sis190_init_rxfilter - Initialize the Rx filter
1626 * @dev: network device to initialize
1627 *
1628 * Set receive filter address to our MAC address
1629 * and enable packet filtering.
1630 */
1631 static inline void sis190_init_rxfilter(struct net_device *dev)
1632 {
1633 struct sis190_private *tp = netdev_priv(dev);
1634 void __iomem *ioaddr = tp->mmio_addr;
1635 u16 ctl;
1636 int i;
1637
1638 ctl = SIS_R16(RxMacControl);
1639 /*
1640 * Disable packet filtering before setting filter.
1641 * Note: SiS's driver writes 32 bits but RxMacControl is 16 bits
1642 * only and followed by RxMacAddr (6 bytes). Strange. -- FR
1643 */
1644 SIS_W16(RxMacControl, ctl & ~0x0f00);
1645
1646 for (i = 0; i < MAC_ADDR_LEN; i++)
1647 SIS_W8(RxMacAddr + i, dev->dev_addr[i]);
1648
1649 SIS_W16(RxMacControl, ctl);
1650 SIS_PCI_COMMIT();
1651 }
1652
1653 static int sis190_get_mac_addr(struct pci_dev *pdev, struct net_device *dev)
1654 {
1655 u8 from;
1656
1657 pci_read_config_byte(pdev, 0x73, &from);
1658
1659 return (from & 0x00000001) ?
1660 sis190_get_mac_addr_from_apc(pdev, dev) :
1661 sis190_get_mac_addr_from_eeprom(pdev, dev);
1662 }
1663
1664 static void sis190_set_speed_auto(struct net_device *dev)
1665 {
1666 struct sis190_private *tp = netdev_priv(dev);
1667 void __iomem *ioaddr = tp->mmio_addr;
1668 int phy_id = tp->mii_if.phy_id;
1669 int val;
1670
1671 net_link(tp, KERN_INFO "%s: Enabling Auto-negotiation.\n", dev->name);
1672
1673 val = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
1674
1675 // Enable 10/100 Full/Half Mode, leave MII_ADVERTISE bit4:0
1676 // unchanged.
1677 mdio_write(ioaddr, phy_id, MII_ADVERTISE, (val & ADVERTISE_SLCT) |
1678 ADVERTISE_100FULL | ADVERTISE_10FULL |
1679 ADVERTISE_100HALF | ADVERTISE_10HALF);
1680
1681 // Enable 1000 Full Mode.
1682 mdio_write(ioaddr, phy_id, MII_CTRL1000, ADVERTISE_1000FULL);
1683
1684 // Enable auto-negotiation and restart auto-negotiation.
1685 mdio_write(ioaddr, phy_id, MII_BMCR,
1686 BMCR_ANENABLE | BMCR_ANRESTART | BMCR_RESET);
1687 }
1688
1689 static int sis190_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1690 {
1691 struct sis190_private *tp = netdev_priv(dev);
1692
1693 return mii_ethtool_gset(&tp->mii_if, cmd);
1694 }
1695
1696 static int sis190_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1697 {
1698 struct sis190_private *tp = netdev_priv(dev);
1699
1700 return mii_ethtool_sset(&tp->mii_if, cmd);
1701 }
1702
1703 static void sis190_get_drvinfo(struct net_device *dev,
1704 struct ethtool_drvinfo *info)
1705 {
1706 struct sis190_private *tp = netdev_priv(dev);
1707
1708 strcpy(info->driver, DRV_NAME);
1709 strcpy(info->version, DRV_VERSION);
1710 strcpy(info->bus_info, pci_name(tp->pci_dev));
1711 }
1712
1713 static int sis190_get_regs_len(struct net_device *dev)
1714 {
1715 return SIS190_REGS_SIZE;
1716 }
1717
1718 static void sis190_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1719 void *p)
1720 {
1721 struct sis190_private *tp = netdev_priv(dev);
1722 unsigned long flags;
1723
1724 if (regs->len > SIS190_REGS_SIZE)
1725 regs->len = SIS190_REGS_SIZE;
1726
1727 spin_lock_irqsave(&tp->lock, flags);
1728 memcpy_fromio(p, tp->mmio_addr, regs->len);
1729 spin_unlock_irqrestore(&tp->lock, flags);
1730 }
1731
1732 static int sis190_nway_reset(struct net_device *dev)
1733 {
1734 struct sis190_private *tp = netdev_priv(dev);
1735
1736 return mii_nway_restart(&tp->mii_if);
1737 }
1738
1739 static u32 sis190_get_msglevel(struct net_device *dev)
1740 {
1741 struct sis190_private *tp = netdev_priv(dev);
1742
1743 return tp->msg_enable;
1744 }
1745
1746 static void sis190_set_msglevel(struct net_device *dev, u32 value)
1747 {
1748 struct sis190_private *tp = netdev_priv(dev);
1749
1750 tp->msg_enable = value;
1751 }
1752
1753 static struct ethtool_ops sis190_ethtool_ops = {
1754 .get_settings = sis190_get_settings,
1755 .set_settings = sis190_set_settings,
1756 .get_drvinfo = sis190_get_drvinfo,
1757 .get_regs_len = sis190_get_regs_len,
1758 .get_regs = sis190_get_regs,
1759 .get_link = ethtool_op_get_link,
1760 .get_msglevel = sis190_get_msglevel,
1761 .set_msglevel = sis190_set_msglevel,
1762 .nway_reset = sis190_nway_reset,
1763 };
1764
1765 static int sis190_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1766 {
1767 struct sis190_private *tp = netdev_priv(dev);
1768
1769 return !netif_running(dev) ? -EINVAL :
1770 generic_mii_ioctl(&tp->mii_if, if_mii(ifr), cmd, NULL);
1771 }
1772
1773 static int __devinit sis190_init_one(struct pci_dev *pdev,
1774 const struct pci_device_id *ent)
1775 {
1776 static int printed_version = 0;
1777 struct sis190_private *tp;
1778 struct net_device *dev;
1779 void __iomem *ioaddr;
1780 int rc;
1781
1782 if (!printed_version) {
1783 net_drv(&debug, KERN_INFO SIS190_DRIVER_NAME " loaded.\n");
1784 printed_version = 1;
1785 }
1786
1787 dev = sis190_init_board(pdev);
1788 if (IS_ERR(dev)) {
1789 rc = PTR_ERR(dev);
1790 goto out;
1791 }
1792
1793 pci_set_drvdata(pdev, dev);
1794
1795 tp = netdev_priv(dev);
1796 ioaddr = tp->mmio_addr;
1797
1798 rc = sis190_get_mac_addr(pdev, dev);
1799 if (rc < 0)
1800 goto err_release_board;
1801
1802 sis190_init_rxfilter(dev);
1803
1804 INIT_WORK(&tp->phy_task, sis190_phy_task, dev);
1805
1806 dev->open = sis190_open;
1807 dev->stop = sis190_close;
1808 dev->do_ioctl = sis190_ioctl;
1809 dev->get_stats = sis190_get_stats;
1810 dev->tx_timeout = sis190_tx_timeout;
1811 dev->watchdog_timeo = SIS190_TX_TIMEOUT;
1812 dev->hard_start_xmit = sis190_start_xmit;
1813 #ifdef CONFIG_NET_POLL_CONTROLLER
1814 dev->poll_controller = sis190_netpoll;
1815 #endif
1816 dev->set_multicast_list = sis190_set_rx_mode;
1817 SET_ETHTOOL_OPS(dev, &sis190_ethtool_ops);
1818 dev->irq = pdev->irq;
1819 dev->base_addr = (unsigned long) 0xdead;
1820
1821 spin_lock_init(&tp->lock);
1822
1823 rc = sis190_mii_probe(dev);
1824 if (rc < 0)
1825 goto err_release_board;
1826
1827 rc = register_netdev(dev);
1828 if (rc < 0)
1829 goto err_remove_mii;
1830
1831 net_probe(tp, KERN_INFO "%s: %s at %p (IRQ: %d), "
1832 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1833 pci_name(pdev), sis_chip_info[ent->driver_data].name,
1834 ioaddr, dev->irq,
1835 dev->dev_addr[0], dev->dev_addr[1],
1836 dev->dev_addr[2], dev->dev_addr[3],
1837 dev->dev_addr[4], dev->dev_addr[5]);
1838
1839 net_probe(tp, KERN_INFO "%s: %s mode.\n", dev->name,
1840 (tp->features & F_HAS_RGMII) ? "RGMII" : "GMII");
1841
1842 netif_carrier_off(dev);
1843
1844 sis190_set_speed_auto(dev);
1845 out:
1846 return rc;
1847
1848 err_remove_mii:
1849 sis190_mii_remove(dev);
1850 err_release_board:
1851 sis190_release_board(pdev);
1852 goto out;
1853 }
1854
1855 static void __devexit sis190_remove_one(struct pci_dev *pdev)
1856 {
1857 struct net_device *dev = pci_get_drvdata(pdev);
1858
1859 sis190_mii_remove(dev);
1860 unregister_netdev(dev);
1861 sis190_release_board(pdev);
1862 pci_set_drvdata(pdev, NULL);
1863 }
1864
1865 static struct pci_driver sis190_pci_driver = {
1866 .name = DRV_NAME,
1867 .id_table = sis190_pci_tbl,
1868 .probe = sis190_init_one,
1869 .remove = __devexit_p(sis190_remove_one),
1870 };
1871
1872 static int __init sis190_init_module(void)
1873 {
1874 return pci_module_init(&sis190_pci_driver);
1875 }
1876
1877 static void __exit sis190_cleanup_module(void)
1878 {
1879 pci_unregister_driver(&sis190_pci_driver);
1880 }
1881
1882 module_init(sis190_init_module);
1883 module_exit(sis190_cleanup_module);
Linux kernel - Deliverables
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