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[linux-2.6/mini2440.git] / drivers / net / sundance.c
blob698893b92003d0f5022a86ba43f12f3a0fa064ce
1 /* sundance.c: A Linux device driver for the Sundance ST201 "Alta". */
2 /*
3 Written 1999-2000 by Donald Becker.
4
5 This software may be used and distributed according to the terms of
6 the GNU General Public License (GPL), incorporated herein by reference.
7 Drivers based on or derived from this code fall under the GPL and must
8 retain the authorship, copyright and license notice. This file is not
9 a complete program and may only be used when the entire operating
10 system is licensed under the GPL.
11
12 The author may be reached as becker@scyld.com, or C/O
13 Scyld Computing Corporation
14 410 Severn Ave., Suite 210
15 Annapolis MD 21403
16
17 Support and updates available at
18 http://www.scyld.com/network/sundance.html
19 [link no longer provides useful info -jgarzik]
20 Archives of the mailing list are still available at
21 http://www.beowulf.org/pipermail/netdrivers/
22
23 */
24
25 #define DRV_NAME "sundance"
26 #define DRV_VERSION "1.2"
27 #define DRV_RELDATE "11-Sep-2006"
28
29
30 /* The user-configurable values.
31 These may be modified when a driver module is loaded.*/
32 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
33 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
34 Typical is a 64 element hash table based on the Ethernet CRC. */
35 static const int multicast_filter_limit = 32;
36
37 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
38 Setting to > 1518 effectively disables this feature.
39 This chip can receive into offset buffers, so the Alpha does not
40 need a copy-align. */
41 static int rx_copybreak;
42 static int flowctrl=1;
43
44 /* media[] specifies the media type the NIC operates at.
45 autosense Autosensing active media.
46 10mbps_hd 10Mbps half duplex.
47 10mbps_fd 10Mbps full duplex.
48 100mbps_hd 100Mbps half duplex.
49 100mbps_fd 100Mbps full duplex.
50 0 Autosensing active media.
51 1 10Mbps half duplex.
52 2 10Mbps full duplex.
53 3 100Mbps half duplex.
54 4 100Mbps full duplex.
55 */
56 #define MAX_UNITS 8
57 static char *media[MAX_UNITS];
58
59
60 /* Operational parameters that are set at compile time. */
61
62 /* Keep the ring sizes a power of two for compile efficiency.
63 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
64 Making the Tx ring too large decreases the effectiveness of channel
65 bonding and packet priority, and more than 128 requires modifying the
66 Tx error recovery.
67 Large receive rings merely waste memory. */
68 #define TX_RING_SIZE 32
69 #define TX_QUEUE_LEN (TX_RING_SIZE - 1) /* Limit ring entries actually used. */
70 #define RX_RING_SIZE 64
71 #define RX_BUDGET 32
72 #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct netdev_desc)
73 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct netdev_desc)
74
75 /* Operational parameters that usually are not changed. */
76 /* Time in jiffies before concluding the transmitter is hung. */
77 #define TX_TIMEOUT (4*HZ)
78 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
79
80 /* Include files, designed to support most kernel versions 2.0.0 and later. */
81 #include <linux/module.h>
82 #include <linux/kernel.h>
83 #include <linux/string.h>
84 #include <linux/timer.h>
85 #include <linux/errno.h>
86 #include <linux/ioport.h>
87 #include <linux/slab.h>
88 #include <linux/interrupt.h>
89 #include <linux/pci.h>
90 #include <linux/netdevice.h>
91 #include <linux/etherdevice.h>
92 #include <linux/skbuff.h>
93 #include <linux/init.h>
94 #include <linux/bitops.h>
95 #include <asm/uaccess.h>
96 #include <asm/processor.h> /* Processor type for cache alignment. */
97 #include <asm/io.h>
98 #include <linux/delay.h>
99 #include <linux/spinlock.h>
100 #ifndef _COMPAT_WITH_OLD_KERNEL
101 #include <linux/crc32.h>
102 #include <linux/ethtool.h>
103 #include <linux/mii.h>
104 #else
105 #include "crc32.h"
106 #include "ethtool.h"
107 #include "mii.h"
108 #include "compat.h"
109 #endif
110
111 /* These identify the driver base version and may not be removed. */
112 static char version[] =
113 KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n";
114
115 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
116 MODULE_DESCRIPTION("Sundance Alta Ethernet driver");
117 MODULE_LICENSE("GPL");
118
119 module_param(debug, int, 0);
120 module_param(rx_copybreak, int, 0);
121 module_param_array(media, charp, NULL, 0);
122 module_param(flowctrl, int, 0);
123 MODULE_PARM_DESC(debug, "Sundance Alta debug level (0-5)");
124 MODULE_PARM_DESC(rx_copybreak, "Sundance Alta copy breakpoint for copy-only-tiny-frames");
125 MODULE_PARM_DESC(flowctrl, "Sundance Alta flow control [0|1]");
126
127 /*
128 Theory of Operation
129
130 I. Board Compatibility
131
132 This driver is designed for the Sundance Technologies "Alta" ST201 chip.
133
134 II. Board-specific settings
135
136 III. Driver operation
137
138 IIIa. Ring buffers
139
140 This driver uses two statically allocated fixed-size descriptor lists
141 formed into rings by a branch from the final descriptor to the beginning of
142 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
143 Some chips explicitly use only 2^N sized rings, while others use a
144 'next descriptor' pointer that the driver forms into rings.
145
146 IIIb/c. Transmit/Receive Structure
147
148 This driver uses a zero-copy receive and transmit scheme.
149 The driver allocates full frame size skbuffs for the Rx ring buffers at
150 open() time and passes the skb->data field to the chip as receive data
151 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
152 a fresh skbuff is allocated and the frame is copied to the new skbuff.
153 When the incoming frame is larger, the skbuff is passed directly up the
154 protocol stack. Buffers consumed this way are replaced by newly allocated
155 skbuffs in a later phase of receives.
156
157 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
158 using a full-sized skbuff for small frames vs. the copying costs of larger
159 frames. New boards are typically used in generously configured machines
160 and the underfilled buffers have negligible impact compared to the benefit of
161 a single allocation size, so the default value of zero results in never
162 copying packets. When copying is done, the cost is usually mitigated by using
163 a combined copy/checksum routine. Copying also preloads the cache, which is
164 most useful with small frames.
165
166 A subtle aspect of the operation is that the IP header at offset 14 in an
167 ethernet frame isn't longword aligned for further processing.
168 Unaligned buffers are permitted by the Sundance hardware, so
169 frames are received into the skbuff at an offset of "+2", 16-byte aligning
170 the IP header.
171
172 IIId. Synchronization
173
174 The driver runs as two independent, single-threaded flows of control. One
175 is the send-packet routine, which enforces single-threaded use by the
176 dev->tbusy flag. The other thread is the interrupt handler, which is single
177 threaded by the hardware and interrupt handling software.
178
179 The send packet thread has partial control over the Tx ring and 'dev->tbusy'
180 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
181 queue slot is empty, it clears the tbusy flag when finished otherwise it sets
182 the 'lp->tx_full' flag.
183
184 The interrupt handler has exclusive control over the Rx ring and records stats
185 from the Tx ring. After reaping the stats, it marks the Tx queue entry as
186 empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
187 clears both the tx_full and tbusy flags.
188
189 IV. Notes
190
191 IVb. References
192
193 The Sundance ST201 datasheet, preliminary version.
194 The Kendin KS8723 datasheet, preliminary version.
195 The ICplus IP100 datasheet, preliminary version.
196 http://www.scyld.com/expert/100mbps.html
197 http://www.scyld.com/expert/NWay.html
198
199 IVc. Errata
200
201 */
202
203 /* Work-around for Kendin chip bugs. */
204 #ifndef CONFIG_SUNDANCE_MMIO
205 #define USE_IO_OPS 1
206 #endif
207
208 static const struct pci_device_id sundance_pci_tbl[] = {
209 { 0x1186, 0x1002, 0x1186, 0x1002, 0, 0, 0 },
210 { 0x1186, 0x1002, 0x1186, 0x1003, 0, 0, 1 },
211 { 0x1186, 0x1002, 0x1186, 0x1012, 0, 0, 2 },
212 { 0x1186, 0x1002, 0x1186, 0x1040, 0, 0, 3 },
213 { 0x1186, 0x1002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
214 { 0x13F0, 0x0201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
215 { 0x13F0, 0x0200, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },
216 { }
217 };
218 MODULE_DEVICE_TABLE(pci, sundance_pci_tbl);
219
220 enum {
221 netdev_io_size = 128
222 };
223
224 struct pci_id_info {
225 const char *name;
226 };
227 static const struct pci_id_info pci_id_tbl[] __devinitdata = {
228 {"D-Link DFE-550TX FAST Ethernet Adapter"},
229 {"D-Link DFE-550FX 100Mbps Fiber-optics Adapter"},
230 {"D-Link DFE-580TX 4 port Server Adapter"},
231 {"D-Link DFE-530TXS FAST Ethernet Adapter"},
232 {"D-Link DL10050-based FAST Ethernet Adapter"},
233 {"Sundance Technology Alta"},
234 {"IC Plus Corporation IP100A FAST Ethernet Adapter"},
235 { } /* terminate list. */
236 };
237
238 /* This driver was written to use PCI memory space, however x86-oriented
239 hardware often uses I/O space accesses. */
240
241 /* Offsets to the device registers.
242 Unlike software-only systems, device drivers interact with complex hardware.
243 It's not useful to define symbolic names for every register bit in the
244 device. The name can only partially document the semantics and make
245 the driver longer and more difficult to read.
246 In general, only the important configuration values or bits changed
247 multiple times should be defined symbolically.
248 */
249 enum alta_offsets {
250 DMACtrl = 0x00,
251 TxListPtr = 0x04,
252 TxDMABurstThresh = 0x08,
253 TxDMAUrgentThresh = 0x09,
254 TxDMAPollPeriod = 0x0a,
255 RxDMAStatus = 0x0c,
256 RxListPtr = 0x10,
257 DebugCtrl0 = 0x1a,
258 DebugCtrl1 = 0x1c,
259 RxDMABurstThresh = 0x14,
260 RxDMAUrgentThresh = 0x15,
261 RxDMAPollPeriod = 0x16,
262 LEDCtrl = 0x1a,
263 ASICCtrl = 0x30,
264 EEData = 0x34,
265 EECtrl = 0x36,
266 FlashAddr = 0x40,
267 FlashData = 0x44,
268 TxStatus = 0x46,
269 TxFrameId = 0x47,
270 DownCounter = 0x18,
271 IntrClear = 0x4a,
272 IntrEnable = 0x4c,
273 IntrStatus = 0x4e,
274 MACCtrl0 = 0x50,
275 MACCtrl1 = 0x52,
276 StationAddr = 0x54,
277 MaxFrameSize = 0x5A,
278 RxMode = 0x5c,
279 MIICtrl = 0x5e,
280 MulticastFilter0 = 0x60,
281 MulticastFilter1 = 0x64,
282 RxOctetsLow = 0x68,
283 RxOctetsHigh = 0x6a,
284 TxOctetsLow = 0x6c,
285 TxOctetsHigh = 0x6e,
286 TxFramesOK = 0x70,
287 RxFramesOK = 0x72,
288 StatsCarrierError = 0x74,
289 StatsLateColl = 0x75,
290 StatsMultiColl = 0x76,
291 StatsOneColl = 0x77,
292 StatsTxDefer = 0x78,
293 RxMissed = 0x79,
294 StatsTxXSDefer = 0x7a,
295 StatsTxAbort = 0x7b,
296 StatsBcastTx = 0x7c,
297 StatsBcastRx = 0x7d,
298 StatsMcastTx = 0x7e,
299 StatsMcastRx = 0x7f,
300 /* Aliased and bogus values! */
301 RxStatus = 0x0c,
302 };
303 enum ASICCtrl_HiWord_bit {
304 GlobalReset = 0x0001,
305 RxReset = 0x0002,
306 TxReset = 0x0004,
307 DMAReset = 0x0008,
308 FIFOReset = 0x0010,
309 NetworkReset = 0x0020,
310 HostReset = 0x0040,
311 ResetBusy = 0x0400,
312 };
313
314 /* Bits in the interrupt status/mask registers. */
315 enum intr_status_bits {
316 IntrSummary=0x0001, IntrPCIErr=0x0002, IntrMACCtrl=0x0008,
317 IntrTxDone=0x0004, IntrRxDone=0x0010, IntrRxStart=0x0020,
318 IntrDrvRqst=0x0040,
319 StatsMax=0x0080, LinkChange=0x0100,
320 IntrTxDMADone=0x0200, IntrRxDMADone=0x0400,
321 };
322
323 /* Bits in the RxMode register. */
324 enum rx_mode_bits {
325 AcceptAllIPMulti=0x20, AcceptMultiHash=0x10, AcceptAll=0x08,
326 AcceptBroadcast=0x04, AcceptMulticast=0x02, AcceptMyPhys=0x01,
327 };
328 /* Bits in MACCtrl. */
329 enum mac_ctrl0_bits {
330 EnbFullDuplex=0x20, EnbRcvLargeFrame=0x40,
331 EnbFlowCtrl=0x100, EnbPassRxCRC=0x200,
332 };
333 enum mac_ctrl1_bits {
334 StatsEnable=0x0020, StatsDisable=0x0040, StatsEnabled=0x0080,
335 TxEnable=0x0100, TxDisable=0x0200, TxEnabled=0x0400,
336 RxEnable=0x0800, RxDisable=0x1000, RxEnabled=0x2000,
337 };
338
339 /* The Rx and Tx buffer descriptors. */
340 /* Note that using only 32 bit fields simplifies conversion to big-endian
341 architectures. */
342 struct netdev_desc {
343 __le32 next_desc;
344 __le32 status;
345 struct desc_frag { __le32 addr, length; } frag[1];
346 };
347
348 /* Bits in netdev_desc.status */
349 enum desc_status_bits {
350 DescOwn=0x8000,
351 DescEndPacket=0x4000,
352 DescEndRing=0x2000,
353 LastFrag=0x80000000,
354 DescIntrOnTx=0x8000,
355 DescIntrOnDMADone=0x80000000,
356 DisableAlign = 0x00000001,
357 };
358
359 #define PRIV_ALIGN 15 /* Required alignment mask */
360 /* Use __attribute__((aligned (L1_CACHE_BYTES))) to maintain alignment
361 within the structure. */
362 #define MII_CNT 4
363 struct netdev_private {
364 /* Descriptor rings first for alignment. */
365 struct netdev_desc *rx_ring;
366 struct netdev_desc *tx_ring;
367 struct sk_buff* rx_skbuff[RX_RING_SIZE];
368 struct sk_buff* tx_skbuff[TX_RING_SIZE];
369 dma_addr_t tx_ring_dma;
370 dma_addr_t rx_ring_dma;
371 struct net_device_stats stats;
372 struct timer_list timer; /* Media monitoring timer. */
373 /* Frequently used values: keep some adjacent for cache effect. */
374 spinlock_t lock;
375 spinlock_t rx_lock; /* Group with Tx control cache line. */
376 int msg_enable;
377 int chip_id;
378 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
379 unsigned int rx_buf_sz; /* Based on MTU+slack. */
380 struct netdev_desc *last_tx; /* Last Tx descriptor used. */
381 unsigned int cur_tx, dirty_tx;
382 /* These values are keep track of the transceiver/media in use. */
383 unsigned int flowctrl:1;
384 unsigned int default_port:4; /* Last dev->if_port value. */
385 unsigned int an_enable:1;
386 unsigned int speed;
387 struct tasklet_struct rx_tasklet;
388 struct tasklet_struct tx_tasklet;
389 int budget;
390 int cur_task;
391 /* Multicast and receive mode. */
392 spinlock_t mcastlock; /* SMP lock multicast updates. */
393 u16 mcast_filter[4];
394 /* MII transceiver section. */
395 struct mii_if_info mii_if;
396 int mii_preamble_required;
397 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
398 struct pci_dev *pci_dev;
399 void __iomem *base;
400 };
401
402 /* The station address location in the EEPROM. */
403 #define EEPROM_SA_OFFSET 0x10
404 #define DEFAULT_INTR (IntrRxDMADone | IntrPCIErr | \
405 IntrDrvRqst | IntrTxDone | StatsMax | \
406 LinkChange)
407
408 static int change_mtu(struct net_device *dev, int new_mtu);
409 static int eeprom_read(void __iomem *ioaddr, int location);
410 static int mdio_read(struct net_device *dev, int phy_id, int location);
411 static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
412 static int mdio_wait_link(struct net_device *dev, int wait);
413 static int netdev_open(struct net_device *dev);
414 static void check_duplex(struct net_device *dev);
415 static void netdev_timer(unsigned long data);
416 static void tx_timeout(struct net_device *dev);
417 static void init_ring(struct net_device *dev);
418 static int start_tx(struct sk_buff *skb, struct net_device *dev);
419 static int reset_tx (struct net_device *dev);
420 static irqreturn_t intr_handler(int irq, void *dev_instance);
421 static void rx_poll(unsigned long data);
422 static void tx_poll(unsigned long data);
423 static void refill_rx (struct net_device *dev);
424 static void netdev_error(struct net_device *dev, int intr_status);
425 static void netdev_error(struct net_device *dev, int intr_status);
426 static void set_rx_mode(struct net_device *dev);
427 static int __set_mac_addr(struct net_device *dev);
428 static struct net_device_stats *get_stats(struct net_device *dev);
429 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
430 static int netdev_close(struct net_device *dev);
431 static const struct ethtool_ops ethtool_ops;
432
433 static void sundance_reset(struct net_device *dev, unsigned long reset_cmd)
434 {
435 struct netdev_private *np = netdev_priv(dev);
436 void __iomem *ioaddr = np->base + ASICCtrl;
437 int countdown;
438
439 /* ST201 documentation states ASICCtrl is a 32bit register */
440 iowrite32 (reset_cmd | ioread32 (ioaddr), ioaddr);
441 /* ST201 documentation states reset can take up to 1 ms */
442 countdown = 10 + 1;
443 while (ioread32 (ioaddr) & (ResetBusy << 16)) {
444 if (--countdown == 0) {
445 printk(KERN_WARNING "%s : reset not completed !!\n", dev->name);
446 break;
447 }
448 udelay(100);
449 }
450 }
451
452 static int __devinit sundance_probe1 (struct pci_dev *pdev,
453 const struct pci_device_id *ent)
454 {
455 struct net_device *dev;
456 struct netdev_private *np;
457 static int card_idx;
458 int chip_idx = ent->driver_data;
459 int irq;
460 int i;
461 void __iomem *ioaddr;
462 u16 mii_ctl;
463 void *ring_space;
464 dma_addr_t ring_dma;
465 #ifdef USE_IO_OPS
466 int bar = 0;
467 #else
468 int bar = 1;
469 #endif
470 int phy, phy_end, phy_idx = 0;
471
472 /* when built into the kernel, we only print version if device is found */
473 #ifndef MODULE
474 static int printed_version;
475 if (!printed_version++)
476 printk(version);
477 #endif
478
479 if (pci_enable_device(pdev))
480 return -EIO;
481 pci_set_master(pdev);
482
483 irq = pdev->irq;
484
485 dev = alloc_etherdev(sizeof(*np));
486 if (!dev)
487 return -ENOMEM;
488 SET_NETDEV_DEV(dev, &pdev->dev);
489
490 if (pci_request_regions(pdev, DRV_NAME))
491 goto err_out_netdev;
492
493 ioaddr = pci_iomap(pdev, bar, netdev_io_size);
494 if (!ioaddr)
495 goto err_out_res;
496
497 for (i = 0; i < 3; i++)
498 ((__le16 *)dev->dev_addr)[i] =
499 cpu_to_le16(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET));
500 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
501
502 dev->base_addr = (unsigned long)ioaddr;
503 dev->irq = irq;
504
505 np = netdev_priv(dev);
506 np->base = ioaddr;
507 np->pci_dev = pdev;
508 np->chip_id = chip_idx;
509 np->msg_enable = (1 << debug) - 1;
510 spin_lock_init(&np->lock);
511 tasklet_init(&np->rx_tasklet, rx_poll, (unsigned long)dev);
512 tasklet_init(&np->tx_tasklet, tx_poll, (unsigned long)dev);
513
514 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
515 if (!ring_space)
516 goto err_out_cleardev;
517 np->tx_ring = (struct netdev_desc *)ring_space;
518 np->tx_ring_dma = ring_dma;
519
520 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
521 if (!ring_space)
522 goto err_out_unmap_tx;
523 np->rx_ring = (struct netdev_desc *)ring_space;
524 np->rx_ring_dma = ring_dma;
525
526 np->mii_if.dev = dev;
527 np->mii_if.mdio_read = mdio_read;
528 np->mii_if.mdio_write = mdio_write;
529 np->mii_if.phy_id_mask = 0x1f;
530 np->mii_if.reg_num_mask = 0x1f;
531
532 /* The chip-specific entries in the device structure. */
533 dev->open = &netdev_open;
534 dev->hard_start_xmit = &start_tx;
535 dev->stop = &netdev_close;
536 dev->get_stats = &get_stats;
537 dev->set_multicast_list = &set_rx_mode;
538 dev->do_ioctl = &netdev_ioctl;
539 SET_ETHTOOL_OPS(dev, &ethtool_ops);
540 dev->tx_timeout = &tx_timeout;
541 dev->watchdog_timeo = TX_TIMEOUT;
542 dev->change_mtu = &change_mtu;
543 pci_set_drvdata(pdev, dev);
544
545 i = register_netdev(dev);
546 if (i)
547 goto err_out_unmap_rx;
548
549 printk(KERN_INFO "%s: %s at %p, %pM, IRQ %d.\n",
550 dev->name, pci_id_tbl[chip_idx].name, ioaddr,
551 dev->dev_addr, irq);
552
553 np->phys[0] = 1; /* Default setting */
554 np->mii_preamble_required++;
555
556 /*
557 * It seems some phys doesn't deal well with address 0 being accessed
558 * first
559 */
560 if (sundance_pci_tbl[np->chip_id].device == 0x0200) {
561 phy = 0;
562 phy_end = 31;
563 } else {
564 phy = 1;
565 phy_end = 32; /* wraps to zero, due to 'phy & 0x1f' */
566 }
567 for (; phy <= phy_end && phy_idx < MII_CNT; phy++) {
568 int phyx = phy & 0x1f;
569 int mii_status = mdio_read(dev, phyx, MII_BMSR);
570 if (mii_status != 0xffff && mii_status != 0x0000) {
571 np->phys[phy_idx++] = phyx;
572 np->mii_if.advertising = mdio_read(dev, phyx, MII_ADVERTISE);
573 if ((mii_status & 0x0040) == 0)
574 np->mii_preamble_required++;
575 printk(KERN_INFO "%s: MII PHY found at address %d, status "
576 "0x%4.4x advertising %4.4x.\n",
577 dev->name, phyx, mii_status, np->mii_if.advertising);
578 }
579 }
580 np->mii_preamble_required--;
581
582 if (phy_idx == 0) {
583 printk(KERN_INFO "%s: No MII transceiver found, aborting. ASIC status %x\n",
584 dev->name, ioread32(ioaddr + ASICCtrl));
585 goto err_out_unregister;
586 }
587
588 np->mii_if.phy_id = np->phys[0];
589
590 /* Parse override configuration */
591 np->an_enable = 1;
592 if (card_idx < MAX_UNITS) {
593 if (media[card_idx] != NULL) {
594 np->an_enable = 0;
595 if (strcmp (media[card_idx], "100mbps_fd") == 0 ||
596 strcmp (media[card_idx], "4") == 0) {
597 np->speed = 100;
598 np->mii_if.full_duplex = 1;
599 } else if (strcmp (media[card_idx], "100mbps_hd") == 0
600 || strcmp (media[card_idx], "3") == 0) {
601 np->speed = 100;
602 np->mii_if.full_duplex = 0;
603 } else if (strcmp (media[card_idx], "10mbps_fd") == 0 ||
604 strcmp (media[card_idx], "2") == 0) {
605 np->speed = 10;
606 np->mii_if.full_duplex = 1;
607 } else if (strcmp (media[card_idx], "10mbps_hd") == 0 ||
608 strcmp (media[card_idx], "1") == 0) {
609 np->speed = 10;
610 np->mii_if.full_duplex = 0;
611 } else {
612 np->an_enable = 1;
613 }
614 }
615 if (flowctrl == 1)
616 np->flowctrl = 1;
617 }
618
619 /* Fibre PHY? */
620 if (ioread32 (ioaddr + ASICCtrl) & 0x80) {
621 /* Default 100Mbps Full */
622 if (np->an_enable) {
623 np->speed = 100;
624 np->mii_if.full_duplex = 1;
625 np->an_enable = 0;
626 }
627 }
628 /* Reset PHY */
629 mdio_write (dev, np->phys[0], MII_BMCR, BMCR_RESET);
630 mdelay (300);
631 /* If flow control enabled, we need to advertise it.*/
632 if (np->flowctrl)
633 mdio_write (dev, np->phys[0], MII_ADVERTISE, np->mii_if.advertising | 0x0400);
634 mdio_write (dev, np->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
635 /* Force media type */
636 if (!np->an_enable) {
637 mii_ctl = 0;
638 mii_ctl |= (np->speed == 100) ? BMCR_SPEED100 : 0;
639 mii_ctl |= (np->mii_if.full_duplex) ? BMCR_FULLDPLX : 0;
640 mdio_write (dev, np->phys[0], MII_BMCR, mii_ctl);
641 printk (KERN_INFO "Override speed=%d, %s duplex\n",
642 np->speed, np->mii_if.full_duplex ? "Full" : "Half");
643
644 }
645
646 /* Perhaps move the reset here? */
647 /* Reset the chip to erase previous misconfiguration. */
648 if (netif_msg_hw(np))
649 printk("ASIC Control is %x.\n", ioread32(ioaddr + ASICCtrl));
650 sundance_reset(dev, 0x00ff << 16);
651 if (netif_msg_hw(np))
652 printk("ASIC Control is now %x.\n", ioread32(ioaddr + ASICCtrl));
653
654 card_idx++;
655 return 0;
656
657 err_out_unregister:
658 unregister_netdev(dev);
659 err_out_unmap_rx:
660 pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma);
661 err_out_unmap_tx:
662 pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma);
663 err_out_cleardev:
664 pci_set_drvdata(pdev, NULL);
665 pci_iounmap(pdev, ioaddr);
666 err_out_res:
667 pci_release_regions(pdev);
668 err_out_netdev:
669 free_netdev (dev);
670 return -ENODEV;
671 }
672
673 static int change_mtu(struct net_device *dev, int new_mtu)
674 {
675 if ((new_mtu < 68) || (new_mtu > 8191)) /* Set by RxDMAFrameLen */
676 return -EINVAL;
677 if (netif_running(dev))
678 return -EBUSY;
679 dev->mtu = new_mtu;
680 return 0;
681 }
682
683 #define eeprom_delay(ee_addr) ioread32(ee_addr)
684 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. */
685 static int __devinit eeprom_read(void __iomem *ioaddr, int location)
686 {
687 int boguscnt = 10000; /* Typical 1900 ticks. */
688 iowrite16(0x0200 | (location & 0xff), ioaddr + EECtrl);
689 do {
690 eeprom_delay(ioaddr + EECtrl);
691 if (! (ioread16(ioaddr + EECtrl) & 0x8000)) {
692 return ioread16(ioaddr + EEData);
693 }
694 } while (--boguscnt > 0);
695 return 0;
696 }
697
698 /* MII transceiver control section.
699 Read and write the MII registers using software-generated serial
700 MDIO protocol. See the MII specifications or DP83840A data sheet
701 for details.
702
703 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
704 met by back-to-back 33Mhz PCI cycles. */
705 #define mdio_delay() ioread8(mdio_addr)
706
707 enum mii_reg_bits {
708 MDIO_ShiftClk=0x0001, MDIO_Data=0x0002, MDIO_EnbOutput=0x0004,
709 };
710 #define MDIO_EnbIn (0)
711 #define MDIO_WRITE0 (MDIO_EnbOutput)
712 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
713
714 /* Generate the preamble required for initial synchronization and
715 a few older transceivers. */
716 static void mdio_sync(void __iomem *mdio_addr)
717 {
718 int bits = 32;
719
720 /* Establish sync by sending at least 32 logic ones. */
721 while (--bits >= 0) {
722 iowrite8(MDIO_WRITE1, mdio_addr);
723 mdio_delay();
724 iowrite8(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
725 mdio_delay();
726 }
727 }
728
729 static int mdio_read(struct net_device *dev, int phy_id, int location)
730 {
731 struct netdev_private *np = netdev_priv(dev);
732 void __iomem *mdio_addr = np->base + MIICtrl;
733 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
734 int i, retval = 0;
735
736 if (np->mii_preamble_required)
737 mdio_sync(mdio_addr);
738
739 /* Shift the read command bits out. */
740 for (i = 15; i >= 0; i--) {
741 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
742
743 iowrite8(dataval, mdio_addr);
744 mdio_delay();
745 iowrite8(dataval | MDIO_ShiftClk, mdio_addr);
746 mdio_delay();
747 }
748 /* Read the two transition, 16 data, and wire-idle bits. */
749 for (i = 19; i > 0; i--) {
750 iowrite8(MDIO_EnbIn, mdio_addr);
751 mdio_delay();
752 retval = (retval << 1) | ((ioread8(mdio_addr) & MDIO_Data) ? 1 : 0);
753 iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
754 mdio_delay();
755 }
756 return (retval>>1) & 0xffff;
757 }
758
759 static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
760 {
761 struct netdev_private *np = netdev_priv(dev);
762 void __iomem *mdio_addr = np->base + MIICtrl;
763 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
764 int i;
765
766 if (np->mii_preamble_required)
767 mdio_sync(mdio_addr);
768
769 /* Shift the command bits out. */
770 for (i = 31; i >= 0; i--) {
771 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
772
773 iowrite8(dataval, mdio_addr);
774 mdio_delay();
775 iowrite8(dataval | MDIO_ShiftClk, mdio_addr);
776 mdio_delay();
777 }
778 /* Clear out extra bits. */
779 for (i = 2; i > 0; i--) {
780 iowrite8(MDIO_EnbIn, mdio_addr);
781 mdio_delay();
782 iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
783 mdio_delay();
784 }
785 return;
786 }
787
788 static int mdio_wait_link(struct net_device *dev, int wait)
789 {
790 int bmsr;
791 int phy_id;
792 struct netdev_private *np;
793
794 np = netdev_priv(dev);
795 phy_id = np->phys[0];
796
797 do {
798 bmsr = mdio_read(dev, phy_id, MII_BMSR);
799 if (bmsr & 0x0004)
800 return 0;
801 mdelay(1);
802 } while (--wait > 0);
803 return -1;
804 }
805
806 static int netdev_open(struct net_device *dev)
807 {
808 struct netdev_private *np = netdev_priv(dev);
809 void __iomem *ioaddr = np->base;
810 unsigned long flags;
811 int i;
812
813 /* Do we need to reset the chip??? */
814
815 i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev);
816 if (i)
817 return i;
818
819 if (netif_msg_ifup(np))
820 printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
821 dev->name, dev->irq);
822 init_ring(dev);
823
824 iowrite32(np->rx_ring_dma, ioaddr + RxListPtr);
825 /* The Tx list pointer is written as packets are queued. */
826
827 /* Initialize other registers. */
828 __set_mac_addr(dev);
829 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
830 iowrite16(dev->mtu + 18, ioaddr + MaxFrameSize);
831 #else
832 iowrite16(dev->mtu + 14, ioaddr + MaxFrameSize);
833 #endif
834 if (dev->mtu > 2047)
835 iowrite32(ioread32(ioaddr + ASICCtrl) | 0x0C, ioaddr + ASICCtrl);
836
837 /* Configure the PCI bus bursts and FIFO thresholds. */
838
839 if (dev->if_port == 0)
840 dev->if_port = np->default_port;
841
842 spin_lock_init(&np->mcastlock);
843
844 set_rx_mode(dev);
845 iowrite16(0, ioaddr + IntrEnable);
846 iowrite16(0, ioaddr + DownCounter);
847 /* Set the chip to poll every N*320nsec. */
848 iowrite8(100, ioaddr + RxDMAPollPeriod);
849 iowrite8(127, ioaddr + TxDMAPollPeriod);
850 /* Fix DFE-580TX packet drop issue */
851 if (np->pci_dev->revision >= 0x14)
852 iowrite8(0x01, ioaddr + DebugCtrl1);
853 netif_start_queue(dev);
854
855 spin_lock_irqsave(&np->lock, flags);
856 reset_tx(dev);
857 spin_unlock_irqrestore(&np->lock, flags);
858
859 iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
860
861 if (netif_msg_ifup(np))
862 printk(KERN_DEBUG "%s: Done netdev_open(), status: Rx %x Tx %x "
863 "MAC Control %x, %4.4x %4.4x.\n",
864 dev->name, ioread32(ioaddr + RxStatus), ioread8(ioaddr + TxStatus),
865 ioread32(ioaddr + MACCtrl0),
866 ioread16(ioaddr + MACCtrl1), ioread16(ioaddr + MACCtrl0));
867
868 /* Set the timer to check for link beat. */
869 init_timer(&np->timer);
870 np->timer.expires = jiffies + 3*HZ;
871 np->timer.data = (unsigned long)dev;
872 np->timer.function = &netdev_timer; /* timer handler */
873 add_timer(&np->timer);
874
875 /* Enable interrupts by setting the interrupt mask. */
876 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
877
878 return 0;
879 }
880
881 static void check_duplex(struct net_device *dev)
882 {
883 struct netdev_private *np = netdev_priv(dev);
884 void __iomem *ioaddr = np->base;
885 int mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
886 int negotiated = mii_lpa & np->mii_if.advertising;
887 int duplex;
888
889 /* Force media */
890 if (!np->an_enable || mii_lpa == 0xffff) {
891 if (np->mii_if.full_duplex)
892 iowrite16 (ioread16 (ioaddr + MACCtrl0) | EnbFullDuplex,
893 ioaddr + MACCtrl0);
894 return;
895 }
896
897 /* Autonegotiation */
898 duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
899 if (np->mii_if.full_duplex != duplex) {
900 np->mii_if.full_duplex = duplex;
901 if (netif_msg_link(np))
902 printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
903 "negotiated capability %4.4x.\n", dev->name,
904 duplex ? "full" : "half", np->phys[0], negotiated);
905 iowrite16(ioread16(ioaddr + MACCtrl0) | duplex ? 0x20 : 0, ioaddr + MACCtrl0);
906 }
907 }
908
909 static void netdev_timer(unsigned long data)
910 {
911 struct net_device *dev = (struct net_device *)data;
912 struct netdev_private *np = netdev_priv(dev);
913 void __iomem *ioaddr = np->base;
914 int next_tick = 10*HZ;
915
916 if (netif_msg_timer(np)) {
917 printk(KERN_DEBUG "%s: Media selection timer tick, intr status %4.4x, "
918 "Tx %x Rx %x.\n",
919 dev->name, ioread16(ioaddr + IntrEnable),
920 ioread8(ioaddr + TxStatus), ioread32(ioaddr + RxStatus));
921 }
922 check_duplex(dev);
923 np->timer.expires = jiffies + next_tick;
924 add_timer(&np->timer);
925 }
926
927 static void tx_timeout(struct net_device *dev)
928 {
929 struct netdev_private *np = netdev_priv(dev);
930 void __iomem *ioaddr = np->base;
931 unsigned long flag;
932
933 netif_stop_queue(dev);
934 tasklet_disable(&np->tx_tasklet);
935 iowrite16(0, ioaddr + IntrEnable);
936 printk(KERN_WARNING "%s: Transmit timed out, TxStatus %2.2x "
937 "TxFrameId %2.2x,"
938 " resetting...\n", dev->name, ioread8(ioaddr + TxStatus),
939 ioread8(ioaddr + TxFrameId));
940
941 {
942 int i;
943 for (i=0; i<TX_RING_SIZE; i++) {
944 printk(KERN_DEBUG "%02x %08llx %08x %08x(%02x) %08x %08x\n", i,
945 (unsigned long long)(np->tx_ring_dma + i*sizeof(*np->tx_ring)),
946 le32_to_cpu(np->tx_ring[i].next_desc),
947 le32_to_cpu(np->tx_ring[i].status),
948 (le32_to_cpu(np->tx_ring[i].status) >> 2) & 0xff,
949 le32_to_cpu(np->tx_ring[i].frag[0].addr),
950 le32_to_cpu(np->tx_ring[i].frag[0].length));
951 }
952 printk(KERN_DEBUG "TxListPtr=%08x netif_queue_stopped=%d\n",
953 ioread32(np->base + TxListPtr),
954 netif_queue_stopped(dev));
955 printk(KERN_DEBUG "cur_tx=%d(%02x) dirty_tx=%d(%02x)\n",
956 np->cur_tx, np->cur_tx % TX_RING_SIZE,
957 np->dirty_tx, np->dirty_tx % TX_RING_SIZE);
958 printk(KERN_DEBUG "cur_rx=%d dirty_rx=%d\n", np->cur_rx, np->dirty_rx);
959 printk(KERN_DEBUG "cur_task=%d\n", np->cur_task);
960 }
961 spin_lock_irqsave(&np->lock, flag);
962
963 /* Stop and restart the chip's Tx processes . */
964 reset_tx(dev);
965 spin_unlock_irqrestore(&np->lock, flag);
966
967 dev->if_port = 0;
968
969 dev->trans_start = jiffies;
970 np->stats.tx_errors++;
971 if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
972 netif_wake_queue(dev);
973 }
974 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
975 tasklet_enable(&np->tx_tasklet);
976 }
977
978
979 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
980 static void init_ring(struct net_device *dev)
981 {
982 struct netdev_private *np = netdev_priv(dev);
983 int i;
984
985 np->cur_rx = np->cur_tx = 0;
986 np->dirty_rx = np->dirty_tx = 0;
987 np->cur_task = 0;
988
989 np->rx_buf_sz = (dev->mtu <= 1520 ? PKT_BUF_SZ : dev->mtu + 16);
990
991 /* Initialize all Rx descriptors. */
992 for (i = 0; i < RX_RING_SIZE; i++) {
993 np->rx_ring[i].next_desc = cpu_to_le32(np->rx_ring_dma +
994 ((i+1)%RX_RING_SIZE)*sizeof(*np->rx_ring));
995 np->rx_ring[i].status = 0;
996 np->rx_ring[i].frag[0].length = 0;
997 np->rx_skbuff[i] = NULL;
998 }
999
1000 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1001 for (i = 0; i < RX_RING_SIZE; i++) {
1002 struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
1003 np->rx_skbuff[i] = skb;
1004 if (skb == NULL)
1005 break;
1006 skb->dev = dev; /* Mark as being used by this device. */
1007 skb_reserve(skb, 2); /* 16 byte align the IP header. */
1008 np->rx_ring[i].frag[0].addr = cpu_to_le32(
1009 pci_map_single(np->pci_dev, skb->data, np->rx_buf_sz,
1010 PCI_DMA_FROMDEVICE));
1011 np->rx_ring[i].frag[0].length = cpu_to_le32(np->rx_buf_sz | LastFrag);
1012 }
1013 np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1014
1015 for (i = 0; i < TX_RING_SIZE; i++) {
1016 np->tx_skbuff[i] = NULL;
1017 np->tx_ring[i].status = 0;
1018 }
1019 return;
1020 }
1021
1022 static void tx_poll (unsigned long data)
1023 {
1024 struct net_device *dev = (struct net_device *)data;
1025 struct netdev_private *np = netdev_priv(dev);
1026 unsigned head = np->cur_task % TX_RING_SIZE;
1027 struct netdev_desc *txdesc =
1028 &np->tx_ring[(np->cur_tx - 1) % TX_RING_SIZE];
1029
1030 /* Chain the next pointer */
1031 for (; np->cur_tx - np->cur_task > 0; np->cur_task++) {
1032 int entry = np->cur_task % TX_RING_SIZE;
1033 txdesc = &np->tx_ring[entry];
1034 if (np->last_tx) {
1035 np->last_tx->next_desc = cpu_to_le32(np->tx_ring_dma +
1036 entry*sizeof(struct netdev_desc));
1037 }
1038 np->last_tx = txdesc;
1039 }
1040 /* Indicate the latest descriptor of tx ring */
1041 txdesc->status |= cpu_to_le32(DescIntrOnTx);
1042
1043 if (ioread32 (np->base + TxListPtr) == 0)
1044 iowrite32 (np->tx_ring_dma + head * sizeof(struct netdev_desc),
1045 np->base + TxListPtr);
1046 return;
1047 }
1048
1049 static int
1050 start_tx (struct sk_buff *skb, struct net_device *dev)
1051 {
1052 struct netdev_private *np = netdev_priv(dev);
1053 struct netdev_desc *txdesc;
1054 unsigned entry;
1055
1056 /* Calculate the next Tx descriptor entry. */
1057 entry = np->cur_tx % TX_RING_SIZE;
1058 np->tx_skbuff[entry] = skb;
1059 txdesc = &np->tx_ring[entry];
1060
1061 txdesc->next_desc = 0;
1062 txdesc->status = cpu_to_le32 ((entry << 2) | DisableAlign);
1063 txdesc->frag[0].addr = cpu_to_le32 (pci_map_single (np->pci_dev, skb->data,
1064 skb->len,
1065 PCI_DMA_TODEVICE));
1066 txdesc->frag[0].length = cpu_to_le32 (skb->len | LastFrag);
1067
1068 /* Increment cur_tx before tasklet_schedule() */
1069 np->cur_tx++;
1070 mb();
1071 /* Schedule a tx_poll() task */
1072 tasklet_schedule(&np->tx_tasklet);
1073
1074 /* On some architectures: explicitly flush cache lines here. */
1075 if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 1
1076 && !netif_queue_stopped(dev)) {
1077 /* do nothing */
1078 } else {
1079 netif_stop_queue (dev);
1080 }
1081 dev->trans_start = jiffies;
1082 if (netif_msg_tx_queued(np)) {
1083 printk (KERN_DEBUG
1084 "%s: Transmit frame #%d queued in slot %d.\n",
1085 dev->name, np->cur_tx, entry);
1086 }
1087 return 0;
1088 }
1089
1090 /* Reset hardware tx and free all of tx buffers */
1091 static int
1092 reset_tx (struct net_device *dev)
1093 {
1094 struct netdev_private *np = netdev_priv(dev);
1095 void __iomem *ioaddr = np->base;
1096 struct sk_buff *skb;
1097 int i;
1098 int irq = in_interrupt();
1099
1100 /* Reset tx logic, TxListPtr will be cleaned */
1101 iowrite16 (TxDisable, ioaddr + MACCtrl1);
1102 sundance_reset(dev, (NetworkReset|FIFOReset|DMAReset|TxReset) << 16);
1103
1104 /* free all tx skbuff */
1105 for (i = 0; i < TX_RING_SIZE; i++) {
1106 np->tx_ring[i].next_desc = 0;
1107
1108 skb = np->tx_skbuff[i];
1109 if (skb) {
1110 pci_unmap_single(np->pci_dev,
1111 le32_to_cpu(np->tx_ring[i].frag[0].addr),
1112 skb->len, PCI_DMA_TODEVICE);
1113 if (irq)
1114 dev_kfree_skb_irq (skb);
1115 else
1116 dev_kfree_skb (skb);
1117 np->tx_skbuff[i] = NULL;
1118 np->stats.tx_dropped++;
1119 }
1120 }
1121 np->cur_tx = np->dirty_tx = 0;
1122 np->cur_task = 0;
1123
1124 np->last_tx = NULL;
1125 iowrite8(127, ioaddr + TxDMAPollPeriod);
1126
1127 iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
1128 return 0;
1129 }
1130
1131 /* The interrupt handler cleans up after the Tx thread,
1132 and schedule a Rx thread work */
1133 static irqreturn_t intr_handler(int irq, void *dev_instance)
1134 {
1135 struct net_device *dev = (struct net_device *)dev_instance;
1136 struct netdev_private *np = netdev_priv(dev);
1137 void __iomem *ioaddr = np->base;
1138 int hw_frame_id;
1139 int tx_cnt;
1140 int tx_status;
1141 int handled = 0;
1142 int i;
1143
1144
1145 do {
1146 int intr_status = ioread16(ioaddr + IntrStatus);
1147 iowrite16(intr_status, ioaddr + IntrStatus);
1148
1149 if (netif_msg_intr(np))
1150 printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
1151 dev->name, intr_status);
1152
1153 if (!(intr_status & DEFAULT_INTR))
1154 break;
1155
1156 handled = 1;
1157
1158 if (intr_status & (IntrRxDMADone)) {
1159 iowrite16(DEFAULT_INTR & ~(IntrRxDone|IntrRxDMADone),
1160 ioaddr + IntrEnable);
1161 if (np->budget < 0)
1162 np->budget = RX_BUDGET;
1163 tasklet_schedule(&np->rx_tasklet);
1164 }
1165 if (intr_status & (IntrTxDone | IntrDrvRqst)) {
1166 tx_status = ioread16 (ioaddr + TxStatus);
1167 for (tx_cnt=32; tx_status & 0x80; --tx_cnt) {
1168 if (netif_msg_tx_done(np))
1169 printk
1170 ("%s: Transmit status is %2.2x.\n",
1171 dev->name, tx_status);
1172 if (tx_status & 0x1e) {
1173 if (netif_msg_tx_err(np))
1174 printk("%s: Transmit error status %4.4x.\n",
1175 dev->name, tx_status);
1176 np->stats.tx_errors++;
1177 if (tx_status & 0x10)
1178 np->stats.tx_fifo_errors++;
1179 if (tx_status & 0x08)
1180 np->stats.collisions++;
1181 if (tx_status & 0x04)
1182 np->stats.tx_fifo_errors++;
1183 if (tx_status & 0x02)
1184 np->stats.tx_window_errors++;
1185
1186 /*
1187 ** This reset has been verified on
1188 ** DFE-580TX boards ! phdm@macqel.be.
1189 */
1190 if (tx_status & 0x10) { /* TxUnderrun */
1191 /* Restart Tx FIFO and transmitter */
1192 sundance_reset(dev, (NetworkReset|FIFOReset|TxReset) << 16);
1193 /* No need to reset the Tx pointer here */
1194 }
1195 /* Restart the Tx. Need to make sure tx enabled */
1196 i = 10;
1197 do {
1198 iowrite16(ioread16(ioaddr + MACCtrl1) | TxEnable, ioaddr + MACCtrl1);
1199 if (ioread16(ioaddr + MACCtrl1) & TxEnabled)
1200 break;
1201 mdelay(1);
1202 } while (--i);
1203 }
1204 /* Yup, this is a documentation bug. It cost me *hours*. */
1205 iowrite16 (0, ioaddr + TxStatus);
1206 if (tx_cnt < 0) {
1207 iowrite32(5000, ioaddr + DownCounter);
1208 break;
1209 }
1210 tx_status = ioread16 (ioaddr + TxStatus);
1211 }
1212 hw_frame_id = (tx_status >> 8) & 0xff;
1213 } else {
1214 hw_frame_id = ioread8(ioaddr + TxFrameId);
1215 }
1216
1217 if (np->pci_dev->revision >= 0x14) {
1218 spin_lock(&np->lock);
1219 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1220 int entry = np->dirty_tx % TX_RING_SIZE;
1221 struct sk_buff *skb;
1222 int sw_frame_id;
1223 sw_frame_id = (le32_to_cpu(
1224 np->tx_ring[entry].status) >> 2) & 0xff;
1225 if (sw_frame_id == hw_frame_id &&
1226 !(le32_to_cpu(np->tx_ring[entry].status)
1227 & 0x00010000))
1228 break;
1229 if (sw_frame_id == (hw_frame_id + 1) %
1230 TX_RING_SIZE)
1231 break;
1232 skb = np->tx_skbuff[entry];
1233 /* Free the original skb. */
1234 pci_unmap_single(np->pci_dev,
1235 le32_to_cpu(np->tx_ring[entry].frag[0].addr),
1236 skb->len, PCI_DMA_TODEVICE);
1237 dev_kfree_skb_irq (np->tx_skbuff[entry]);
1238 np->tx_skbuff[entry] = NULL;
1239 np->tx_ring[entry].frag[0].addr = 0;
1240 np->tx_ring[entry].frag[0].length = 0;
1241 }
1242 spin_unlock(&np->lock);
1243 } else {
1244 spin_lock(&np->lock);
1245 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1246 int entry = np->dirty_tx % TX_RING_SIZE;
1247 struct sk_buff *skb;
1248 if (!(le32_to_cpu(np->tx_ring[entry].status)
1249 & 0x00010000))
1250 break;
1251 skb = np->tx_skbuff[entry];
1252 /* Free the original skb. */
1253 pci_unmap_single(np->pci_dev,
1254 le32_to_cpu(np->tx_ring[entry].frag[0].addr),
1255 skb->len, PCI_DMA_TODEVICE);
1256 dev_kfree_skb_irq (np->tx_skbuff[entry]);
1257 np->tx_skbuff[entry] = NULL;
1258 np->tx_ring[entry].frag[0].addr = 0;
1259 np->tx_ring[entry].frag[0].length = 0;
1260 }
1261 spin_unlock(&np->lock);
1262 }
1263
1264 if (netif_queue_stopped(dev) &&
1265 np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
1266 /* The ring is no longer full, clear busy flag. */
1267 netif_wake_queue (dev);
1268 }
1269 /* Abnormal error summary/uncommon events handlers. */
1270 if (intr_status & (IntrPCIErr | LinkChange | StatsMax))
1271 netdev_error(dev, intr_status);
1272 } while (0);
1273 if (netif_msg_intr(np))
1274 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1275 dev->name, ioread16(ioaddr + IntrStatus));
1276 return IRQ_RETVAL(handled);
1277 }
1278
1279 static void rx_poll(unsigned long data)
1280 {
1281 struct net_device *dev = (struct net_device *)data;
1282 struct netdev_private *np = netdev_priv(dev);
1283 int entry = np->cur_rx % RX_RING_SIZE;
1284 int boguscnt = np->budget;
1285 void __iomem *ioaddr = np->base;
1286 int received = 0;
1287
1288 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1289 while (1) {
1290 struct netdev_desc *desc = &(np->rx_ring[entry]);
1291 u32 frame_status = le32_to_cpu(desc->status);
1292 int pkt_len;
1293
1294 if (--boguscnt < 0) {
1295 goto not_done;
1296 }
1297 if (!(frame_status & DescOwn))
1298 break;
1299 pkt_len = frame_status & 0x1fff; /* Chip omits the CRC. */
1300 if (netif_msg_rx_status(np))
1301 printk(KERN_DEBUG " netdev_rx() status was %8.8x.\n",
1302 frame_status);
1303 if (frame_status & 0x001f4000) {
1304 /* There was a error. */
1305 if (netif_msg_rx_err(np))
1306 printk(KERN_DEBUG " netdev_rx() Rx error was %8.8x.\n",
1307 frame_status);
1308 np->stats.rx_errors++;
1309 if (frame_status & 0x00100000) np->stats.rx_length_errors++;
1310 if (frame_status & 0x00010000) np->stats.rx_fifo_errors++;
1311 if (frame_status & 0x00060000) np->stats.rx_frame_errors++;
1312 if (frame_status & 0x00080000) np->stats.rx_crc_errors++;
1313 if (frame_status & 0x00100000) {
1314 printk(KERN_WARNING "%s: Oversized Ethernet frame,"
1315 " status %8.8x.\n",
1316 dev->name, frame_status);
1317 }
1318 } else {
1319 struct sk_buff *skb;
1320 #ifndef final_version
1321 if (netif_msg_rx_status(np))
1322 printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
1323 ", bogus_cnt %d.\n",
1324 pkt_len, boguscnt);
1325 #endif
1326 /* Check if the packet is long enough to accept without copying
1327 to a minimally-sized skbuff. */
1328 if (pkt_len < rx_copybreak
1329 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1330 skb_reserve(skb, 2); /* 16 byte align the IP header */
1331 pci_dma_sync_single_for_cpu(np->pci_dev,
1332 le32_to_cpu(desc->frag[0].addr),
1333 np->rx_buf_sz,
1334 PCI_DMA_FROMDEVICE);
1335
1336 skb_copy_to_linear_data(skb, np->rx_skbuff[entry]->data, pkt_len);
1337 pci_dma_sync_single_for_device(np->pci_dev,
1338 le32_to_cpu(desc->frag[0].addr),
1339 np->rx_buf_sz,
1340 PCI_DMA_FROMDEVICE);
1341 skb_put(skb, pkt_len);
1342 } else {
1343 pci_unmap_single(np->pci_dev,
1344 le32_to_cpu(desc->frag[0].addr),
1345 np->rx_buf_sz,
1346 PCI_DMA_FROMDEVICE);
1347 skb_put(skb = np->rx_skbuff[entry], pkt_len);
1348 np->rx_skbuff[entry] = NULL;
1349 }
1350 skb->protocol = eth_type_trans(skb, dev);
1351 /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
1352 netif_rx(skb);
1353 }
1354 entry = (entry + 1) % RX_RING_SIZE;
1355 received++;
1356 }
1357 np->cur_rx = entry;
1358 refill_rx (dev);
1359 np->budget -= received;
1360 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
1361 return;
1362
1363 not_done:
1364 np->cur_rx = entry;
1365 refill_rx (dev);
1366 if (!received)
1367 received = 1;
1368 np->budget -= received;
1369 if (np->budget <= 0)
1370 np->budget = RX_BUDGET;
1371 tasklet_schedule(&np->rx_tasklet);
1372 return;
1373 }
1374
1375 static void refill_rx (struct net_device *dev)
1376 {
1377 struct netdev_private *np = netdev_priv(dev);
1378 int entry;
1379 int cnt = 0;
1380
1381 /* Refill the Rx ring buffers. */
1382 for (;(np->cur_rx - np->dirty_rx + RX_RING_SIZE) % RX_RING_SIZE > 0;
1383 np->dirty_rx = (np->dirty_rx + 1) % RX_RING_SIZE) {
1384 struct sk_buff *skb;
1385 entry = np->dirty_rx % RX_RING_SIZE;
1386 if (np->rx_skbuff[entry] == NULL) {
1387 skb = dev_alloc_skb(np->rx_buf_sz);
1388 np->rx_skbuff[entry] = skb;
1389 if (skb == NULL)
1390 break; /* Better luck next round. */
1391 skb->dev = dev; /* Mark as being used by this device. */
1392 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1393 np->rx_ring[entry].frag[0].addr = cpu_to_le32(
1394 pci_map_single(np->pci_dev, skb->data,
1395 np->rx_buf_sz, PCI_DMA_FROMDEVICE));
1396 }
1397 /* Perhaps we need not reset this field. */
1398 np->rx_ring[entry].frag[0].length =
1399 cpu_to_le32(np->rx_buf_sz | LastFrag);
1400 np->rx_ring[entry].status = 0;
1401 cnt++;
1402 }
1403 return;
1404 }
1405 static void netdev_error(struct net_device *dev, int intr_status)
1406 {
1407 struct netdev_private *np = netdev_priv(dev);
1408 void __iomem *ioaddr = np->base;
1409 u16 mii_ctl, mii_advertise, mii_lpa;
1410 int speed;
1411
1412 if (intr_status & LinkChange) {
1413 if (mdio_wait_link(dev, 10) == 0) {
1414 printk(KERN_INFO "%s: Link up\n", dev->name);
1415 if (np->an_enable) {
1416 mii_advertise = mdio_read(dev, np->phys[0],
1417 MII_ADVERTISE);
1418 mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
1419 mii_advertise &= mii_lpa;
1420 printk(KERN_INFO "%s: Link changed: ",
1421 dev->name);
1422 if (mii_advertise & ADVERTISE_100FULL) {
1423 np->speed = 100;
1424 printk("100Mbps, full duplex\n");
1425 } else if (mii_advertise & ADVERTISE_100HALF) {
1426 np->speed = 100;
1427 printk("100Mbps, half duplex\n");
1428 } else if (mii_advertise & ADVERTISE_10FULL) {
1429 np->speed = 10;
1430 printk("10Mbps, full duplex\n");
1431 } else if (mii_advertise & ADVERTISE_10HALF) {
1432 np->speed = 10;
1433 printk("10Mbps, half duplex\n");
1434 } else
1435 printk("\n");
1436
1437 } else {
1438 mii_ctl = mdio_read(dev, np->phys[0], MII_BMCR);
1439 speed = (mii_ctl & BMCR_SPEED100) ? 100 : 10;
1440 np->speed = speed;
1441 printk(KERN_INFO "%s: Link changed: %dMbps ,",
1442 dev->name, speed);
1443 printk("%s duplex.\n",
1444 (mii_ctl & BMCR_FULLDPLX) ?
1445 "full" : "half");
1446 }
1447 check_duplex(dev);
1448 if (np->flowctrl && np->mii_if.full_duplex) {
1449 iowrite16(ioread16(ioaddr + MulticastFilter1+2) | 0x0200,
1450 ioaddr + MulticastFilter1+2);
1451 iowrite16(ioread16(ioaddr + MACCtrl0) | EnbFlowCtrl,
1452 ioaddr + MACCtrl0);
1453 }
1454 netif_carrier_on(dev);
1455 } else {
1456 printk(KERN_INFO "%s: Link down\n", dev->name);
1457 netif_carrier_off(dev);
1458 }
1459 }
1460 if (intr_status & StatsMax) {
1461 get_stats(dev);
1462 }
1463 if (intr_status & IntrPCIErr) {
1464 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
1465 dev->name, intr_status);
1466 /* We must do a global reset of DMA to continue. */
1467 }
1468 }
1469
1470 static struct net_device_stats *get_stats(struct net_device *dev)
1471 {
1472 struct netdev_private *np = netdev_priv(dev);
1473 void __iomem *ioaddr = np->base;
1474 int i;
1475
1476 /* We should lock this segment of code for SMP eventually, although
1477 the vulnerability window is very small and statistics are
1478 non-critical. */
1479 /* The chip only need report frame silently dropped. */
1480 np->stats.rx_missed_errors += ioread8(ioaddr + RxMissed);
1481 np->stats.tx_packets += ioread16(ioaddr + TxFramesOK);
1482 np->stats.rx_packets += ioread16(ioaddr + RxFramesOK);
1483 np->stats.collisions += ioread8(ioaddr + StatsLateColl);
1484 np->stats.collisions += ioread8(ioaddr + StatsMultiColl);
1485 np->stats.collisions += ioread8(ioaddr + StatsOneColl);
1486 np->stats.tx_carrier_errors += ioread8(ioaddr + StatsCarrierError);
1487 ioread8(ioaddr + StatsTxDefer);
1488 for (i = StatsTxDefer; i <= StatsMcastRx; i++)
1489 ioread8(ioaddr + i);
1490 np->stats.tx_bytes += ioread16(ioaddr + TxOctetsLow);
1491 np->stats.tx_bytes += ioread16(ioaddr + TxOctetsHigh) << 16;
1492 np->stats.rx_bytes += ioread16(ioaddr + RxOctetsLow);
1493 np->stats.rx_bytes += ioread16(ioaddr + RxOctetsHigh) << 16;
1494
1495 return &np->stats;
1496 }
1497
1498 static void set_rx_mode(struct net_device *dev)
1499 {
1500 struct netdev_private *np = netdev_priv(dev);
1501 void __iomem *ioaddr = np->base;
1502 u16 mc_filter[4]; /* Multicast hash filter */
1503 u32 rx_mode;
1504 int i;
1505
1506 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1507 memset(mc_filter, 0xff, sizeof(mc_filter));
1508 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAll | AcceptMyPhys;
1509 } else if ((dev->mc_count > multicast_filter_limit)
1510 || (dev->flags & IFF_ALLMULTI)) {
1511 /* Too many to match, or accept all multicasts. */
1512 memset(mc_filter, 0xff, sizeof(mc_filter));
1513 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1514 } else if (dev->mc_count) {
1515 struct dev_mc_list *mclist;
1516 int bit;
1517 int index;
1518 int crc;
1519 memset (mc_filter, 0, sizeof (mc_filter));
1520 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1521 i++, mclist = mclist->next) {
1522 crc = ether_crc_le (ETH_ALEN, mclist->dmi_addr);
1523 for (index=0, bit=0; bit < 6; bit++, crc <<= 1)
1524 if (crc & 0x80000000) index |= 1 << bit;
1525 mc_filter[index/16] |= (1 << (index % 16));
1526 }
1527 rx_mode = AcceptBroadcast | AcceptMultiHash | AcceptMyPhys;
1528 } else {
1529 iowrite8(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode);
1530 return;
1531 }
1532 if (np->mii_if.full_duplex && np->flowctrl)
1533 mc_filter[3] |= 0x0200;
1534
1535 for (i = 0; i < 4; i++)
1536 iowrite16(mc_filter[i], ioaddr + MulticastFilter0 + i*2);
1537 iowrite8(rx_mode, ioaddr + RxMode);
1538 }
1539
1540 static int __set_mac_addr(struct net_device *dev)
1541 {
1542 struct netdev_private *np = netdev_priv(dev);
1543 u16 addr16;
1544
1545 addr16 = (dev->dev_addr[0] | (dev->dev_addr[1] << 8));
1546 iowrite16(addr16, np->base + StationAddr);
1547 addr16 = (dev->dev_addr[2] | (dev->dev_addr[3] << 8));
1548 iowrite16(addr16, np->base + StationAddr+2);
1549 addr16 = (dev->dev_addr[4] | (dev->dev_addr[5] << 8));
1550 iowrite16(addr16, np->base + StationAddr+4);
1551 return 0;
1552 }
1553
1554 static int check_if_running(struct net_device *dev)
1555 {
1556 if (!netif_running(dev))
1557 return -EINVAL;
1558 return 0;
1559 }
1560
1561 static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1562 {
1563 struct netdev_private *np = netdev_priv(dev);
1564 strcpy(info->driver, DRV_NAME);
1565 strcpy(info->version, DRV_VERSION);
1566 strcpy(info->bus_info, pci_name(np->pci_dev));
1567 }
1568
1569 static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1570 {
1571 struct netdev_private *np = netdev_priv(dev);
1572 spin_lock_irq(&np->lock);
1573 mii_ethtool_gset(&np->mii_if, ecmd);
1574 spin_unlock_irq(&np->lock);
1575 return 0;
1576 }
1577
1578 static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1579 {
1580 struct netdev_private *np = netdev_priv(dev);
1581 int res;
1582 spin_lock_irq(&np->lock);
1583 res = mii_ethtool_sset(&np->mii_if, ecmd);
1584 spin_unlock_irq(&np->lock);
1585 return res;
1586 }
1587
1588 static int nway_reset(struct net_device *dev)
1589 {
1590 struct netdev_private *np = netdev_priv(dev);
1591 return mii_nway_restart(&np->mii_if);
1592 }
1593
1594 static u32 get_link(struct net_device *dev)
1595 {
1596 struct netdev_private *np = netdev_priv(dev);
1597 return mii_link_ok(&np->mii_if);
1598 }
1599
1600 static u32 get_msglevel(struct net_device *dev)
1601 {
1602 struct netdev_private *np = netdev_priv(dev);
1603 return np->msg_enable;
1604 }
1605
1606 static void set_msglevel(struct net_device *dev, u32 val)
1607 {
1608 struct netdev_private *np = netdev_priv(dev);
1609 np->msg_enable = val;
1610 }
1611
1612 static const struct ethtool_ops ethtool_ops = {
1613 .begin = check_if_running,
1614 .get_drvinfo = get_drvinfo,
1615 .get_settings = get_settings,
1616 .set_settings = set_settings,
1617 .nway_reset = nway_reset,
1618 .get_link = get_link,
1619 .get_msglevel = get_msglevel,
1620 .set_msglevel = set_msglevel,
1621 };
1622
1623 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1624 {
1625 struct netdev_private *np = netdev_priv(dev);
1626 int rc;
1627
1628 if (!netif_running(dev))
1629 return -EINVAL;
1630
1631 spin_lock_irq(&np->lock);
1632 rc = generic_mii_ioctl(&np->mii_if, if_mii(rq), cmd, NULL);
1633 spin_unlock_irq(&np->lock);
1634
1635 return rc;
1636 }
1637
1638 static int netdev_close(struct net_device *dev)
1639 {
1640 struct netdev_private *np = netdev_priv(dev);
1641 void __iomem *ioaddr = np->base;
1642 struct sk_buff *skb;
1643 int i;
1644
1645 /* Wait and kill tasklet */
1646 tasklet_kill(&np->rx_tasklet);
1647 tasklet_kill(&np->tx_tasklet);
1648 np->cur_tx = 0;
1649 np->dirty_tx = 0;
1650 np->cur_task = 0;
1651 np->last_tx = NULL;
1652
1653 netif_stop_queue(dev);
1654
1655 if (netif_msg_ifdown(np)) {
1656 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %2.2x "
1657 "Rx %4.4x Int %2.2x.\n",
1658 dev->name, ioread8(ioaddr + TxStatus),
1659 ioread32(ioaddr + RxStatus), ioread16(ioaddr + IntrStatus));
1660 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1661 dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
1662 }
1663
1664 /* Disable interrupts by clearing the interrupt mask. */
1665 iowrite16(0x0000, ioaddr + IntrEnable);
1666
1667 /* Disable Rx and Tx DMA for safely release resource */
1668 iowrite32(0x500, ioaddr + DMACtrl);
1669
1670 /* Stop the chip's Tx and Rx processes. */
1671 iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
1672
1673 for (i = 2000; i > 0; i--) {
1674 if ((ioread32(ioaddr + DMACtrl) & 0xc000) == 0)
1675 break;
1676 mdelay(1);
1677 }
1678
1679 iowrite16(GlobalReset | DMAReset | FIFOReset | NetworkReset,
1680 ioaddr +ASICCtrl + 2);
1681
1682 for (i = 2000; i > 0; i--) {
1683 if ((ioread16(ioaddr + ASICCtrl +2) & ResetBusy) == 0)
1684 break;
1685 mdelay(1);
1686 }
1687
1688 #ifdef __i386__
1689 if (netif_msg_hw(np)) {
1690 printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
1691 (int)(np->tx_ring_dma));
1692 for (i = 0; i < TX_RING_SIZE; i++)
1693 printk(" #%d desc. %4.4x %8.8x %8.8x.\n",
1694 i, np->tx_ring[i].status, np->tx_ring[i].frag[0].addr,
1695 np->tx_ring[i].frag[0].length);
1696 printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
1697 (int)(np->rx_ring_dma));
1698 for (i = 0; i < /*RX_RING_SIZE*/4 ; i++) {
1699 printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
1700 i, np->rx_ring[i].status, np->rx_ring[i].frag[0].addr,
1701 np->rx_ring[i].frag[0].length);
1702 }
1703 }
1704 #endif /* __i386__ debugging only */
1705
1706 free_irq(dev->irq, dev);
1707
1708 del_timer_sync(&np->timer);
1709
1710 /* Free all the skbuffs in the Rx queue. */
1711 for (i = 0; i < RX_RING_SIZE; i++) {
1712 np->rx_ring[i].status = 0;
1713 skb = np->rx_skbuff[i];
1714 if (skb) {
1715 pci_unmap_single(np->pci_dev,
1716 le32_to_cpu(np->rx_ring[i].frag[0].addr),
1717 np->rx_buf_sz, PCI_DMA_FROMDEVICE);
1718 dev_kfree_skb(skb);
1719 np->rx_skbuff[i] = NULL;
1720 }
1721 np->rx_ring[i].frag[0].addr = cpu_to_le32(0xBADF00D0); /* poison */
1722 }
1723 for (i = 0; i < TX_RING_SIZE; i++) {
1724 np->tx_ring[i].next_desc = 0;
1725 skb = np->tx_skbuff[i];
1726 if (skb) {
1727 pci_unmap_single(np->pci_dev,
1728 le32_to_cpu(np->tx_ring[i].frag[0].addr),
1729 skb->len, PCI_DMA_TODEVICE);
1730 dev_kfree_skb(skb);
1731 np->tx_skbuff[i] = NULL;
1732 }
1733 }
1734
1735 return 0;
1736 }
1737
1738 static void __devexit sundance_remove1 (struct pci_dev *pdev)
1739 {
1740 struct net_device *dev = pci_get_drvdata(pdev);
1741
1742 if (dev) {
1743 struct netdev_private *np = netdev_priv(dev);
1744
1745 unregister_netdev(dev);
1746 pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring,
1747 np->rx_ring_dma);
1748 pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring,
1749 np->tx_ring_dma);
1750 pci_iounmap(pdev, np->base);
1751 pci_release_regions(pdev);
1752 free_netdev(dev);
1753 pci_set_drvdata(pdev, NULL);
1754 }
1755 }
1756
1757 static struct pci_driver sundance_driver = {
1758 .name = DRV_NAME,
1759 .id_table = sundance_pci_tbl,
1760 .probe = sundance_probe1,
1761 .remove = __devexit_p(sundance_remove1),
1762 };
1763
1764 static int __init sundance_init(void)
1765 {
1766 /* when a module, this is printed whether or not devices are found in probe */
1767 #ifdef MODULE
1768 printk(version);
1769 #endif
1770 return pci_register_driver(&sundance_driver);
1771 }
1772
1773 static void __exit sundance_exit(void)
1774 {
1775 pci_unregister_driver(&sundance_driver);
1776 }
1777
1778 module_init(sundance_init);
1779 module_exit(sundance_exit);
1780
1781
Support for the Chinese Samsung S3C2440 based development boards