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 https://www.beowulf.org/pipermail/netdrivers/
22
23 */
24
25 #define DRV_NAME "sundance"
26
27 /* The user-configurable values.
28 These may be modified when a driver module is loaded.*/
29 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
30 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
31 Typical is a 64 element hash table based on the Ethernet CRC. */
32 static const int multicast_filter_limit = 32;
33
34 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
35 Setting to > 1518 effectively disables this feature.
36 This chip can receive into offset buffers, so the Alpha does not
37 need a copy-align. */
38 static int rx_copybreak;
39 static int flowctrl=1;
40
41 /* media[] specifies the media type the NIC operates at.
42 autosense Autosensing active media.
43 10mbps_hd 10Mbps half duplex.
44 10mbps_fd 10Mbps full duplex.
45 100mbps_hd 100Mbps half duplex.
46 100mbps_fd 100Mbps full duplex.
47 0 Autosensing active media.
48 1 10Mbps half duplex.
49 2 10Mbps full duplex.
50 3 100Mbps half duplex.
51 4 100Mbps full duplex.
52 */
53 #define MAX_UNITS 8
54 static char *media[MAX_UNITS];
55
56
57 /* Operational parameters that are set at compile time. */
58
59 /* Keep the ring sizes a power of two for compile efficiency.
60 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
61 Making the Tx ring too large decreases the effectiveness of channel
62 bonding and packet priority, and more than 128 requires modifying the
63 Tx error recovery.
64 Large receive rings merely waste memory. */
65 #define TX_RING_SIZE 32
66 #define TX_QUEUE_LEN (TX_RING_SIZE - 1) /* Limit ring entries actually used. */
67 #define RX_RING_SIZE 64
68 #define RX_BUDGET 32
69 #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct netdev_desc)
70 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct netdev_desc)
71
72 /* Operational parameters that usually are not changed. */
73 /* Time in jiffies before concluding the transmitter is hung. */
74 #define TX_TIMEOUT (4*HZ)
75 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
76
77 /* Include files, designed to support most kernel versions 2.0.0 and later. */
78 #include <linux/module.h>
79 #include <linux/kernel.h>
80 #include <linux/string.h>
81 #include <linux/timer.h>
82 #include <linux/errno.h>
83 #include <linux/ioport.h>
84 #include <linux/interrupt.h>
85 #include <linux/pci.h>
86 #include <linux/netdevice.h>
87 #include <linux/etherdevice.h>
88 #include <linux/skbuff.h>
89 #include <linux/init.h>
90 #include <linux/bitops.h>
91 #include <linux/uaccess.h>
92 #include <asm/processor.h> /* Processor type for cache alignment. */
93 #include <asm/io.h>
94 #include <linux/delay.h>
95 #include <linux/spinlock.h>
96 #include <linux/dma-mapping.h>
97 #include <linux/crc32.h>
98 #include <linux/ethtool.h>
99 #include <linux/mii.h>
100
101 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
102 MODULE_DESCRIPTION("Sundance Alta Ethernet driver");
103 MODULE_LICENSE("GPL");
104
105 module_param(debug, int, 0);
106 module_param(rx_copybreak, int, 0);
107 module_param_array(media, charp, NULL, 0);
108 module_param(flowctrl, int, 0);
109 MODULE_PARM_DESC(debug, "Sundance Alta debug level (0-5)");
110 MODULE_PARM_DESC(rx_copybreak, "Sundance Alta copy breakpoint for copy-only-tiny-frames");
111 MODULE_PARM_DESC(flowctrl, "Sundance Alta flow control [0|1]");
112
113 /*
114 Theory of Operation
115
116 I. Board Compatibility
117
118 This driver is designed for the Sundance Technologies "Alta" ST201 chip.
119
120 II. Board-specific settings
121
122 III. Driver operation
123
124 IIIa. Ring buffers
125
126 This driver uses two statically allocated fixed-size descriptor lists
127 formed into rings by a branch from the final descriptor to the beginning of
128 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
129 Some chips explicitly use only 2^N sized rings, while others use a
130 'next descriptor' pointer that the driver forms into rings.
131
132 IIIb/c. Transmit/Receive Structure
133
134 This driver uses a zero-copy receive and transmit scheme.
135 The driver allocates full frame size skbuffs for the Rx ring buffers at
136 open() time and passes the skb->data field to the chip as receive data
137 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
138 a fresh skbuff is allocated and the frame is copied to the new skbuff.
139 When the incoming frame is larger, the skbuff is passed directly up the
140 protocol stack. Buffers consumed this way are replaced by newly allocated
141 skbuffs in a later phase of receives.
142
143 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
144 using a full-sized skbuff for small frames vs. the copying costs of larger
145 frames. New boards are typically used in generously configured machines
146 and the underfilled buffers have negligible impact compared to the benefit of
147 a single allocation size, so the default value of zero results in never
148 copying packets. When copying is done, the cost is usually mitigated by using
149 a combined copy/checksum routine. Copying also preloads the cache, which is
150 most useful with small frames.
151
152 A subtle aspect of the operation is that the IP header at offset 14 in an
153 ethernet frame isn't longword aligned for further processing.
154 Unaligned buffers are permitted by the Sundance hardware, so
155 frames are received into the skbuff at an offset of "+2", 16-byte aligning
156 the IP header.
157
158 IIId. Synchronization
159
160 The driver runs as two independent, single-threaded flows of control. One
161 is the send-packet routine, which enforces single-threaded use by the
162 dev->tbusy flag. The other thread is the interrupt handler, which is single
163 threaded by the hardware and interrupt handling software.
164
165 The send packet thread has partial control over the Tx ring and 'dev->tbusy'
166 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
167 queue slot is empty, it clears the tbusy flag when finished otherwise it sets
168 the 'lp->tx_full' flag.
169
170 The interrupt handler has exclusive control over the Rx ring and records stats
171 from the Tx ring. After reaping the stats, it marks the Tx queue entry as
172 empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
173 clears both the tx_full and tbusy flags.
174
175 IV. Notes
176
177 IVb. References
178
179 The Sundance ST201 datasheet, preliminary version.
180 The Kendin KS8723 datasheet, preliminary version.
181 The ICplus IP100 datasheet, preliminary version.
182 http://www.scyld.com/expert/100mbps.html
183 http://www.scyld.com/expert/NWay.html
184
185 IVc. Errata
186
187 */
188
189 /* Work-around for Kendin chip bugs. */
190 #ifndef CONFIG_SUNDANCE_MMIO
191 #define USE_IO_OPS 1
192 #endif
193
194 static const struct pci_device_id sundance_pci_tbl[] = {
195 { 0x1186, 0x1002, 0x1186, 0x1002, 0, 0, 0 },
196 { 0x1186, 0x1002, 0x1186, 0x1003, 0, 0, 1 },
197 { 0x1186, 0x1002, 0x1186, 0x1012, 0, 0, 2 },
198 { 0x1186, 0x1002, 0x1186, 0x1040, 0, 0, 3 },
199 { 0x1186, 0x1002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
200 { 0x13F0, 0x0201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
201 { 0x13F0, 0x0200, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },
202 { }
203 };
204 MODULE_DEVICE_TABLE(pci, sundance_pci_tbl);
205
206 enum {
207 netdev_io_size = 128
208 };
209
210 struct pci_id_info {
211 const char *name;
212 };
213 static const struct pci_id_info pci_id_tbl[] = {
214 {"D-Link DFE-550TX FAST Ethernet Adapter"},
215 {"D-Link DFE-550FX 100Mbps Fiber-optics Adapter"},
216 {"D-Link DFE-580TX 4 port Server Adapter"},
217 {"D-Link DFE-530TXS FAST Ethernet Adapter"},
218 {"D-Link DL10050-based FAST Ethernet Adapter"},
219 {"Sundance Technology Alta"},
220 {"IC Plus Corporation IP100A FAST Ethernet Adapter"},
221 { } /* terminate list. */
222 };
223
224 /* This driver was written to use PCI memory space, however x86-oriented
225 hardware often uses I/O space accesses. */
226
227 /* Offsets to the device registers.
228 Unlike software-only systems, device drivers interact with complex hardware.
229 It's not useful to define symbolic names for every register bit in the
230 device. The name can only partially document the semantics and make
231 the driver longer and more difficult to read.
232 In general, only the important configuration values or bits changed
233 multiple times should be defined symbolically.
234 */
235 enum alta_offsets {
236 DMACtrl = 0x00,
237 TxListPtr = 0x04,
238 TxDMABurstThresh = 0x08,
239 TxDMAUrgentThresh = 0x09,
240 TxDMAPollPeriod = 0x0a,
241 RxDMAStatus = 0x0c,
242 RxListPtr = 0x10,
243 DebugCtrl0 = 0x1a,
244 DebugCtrl1 = 0x1c,
245 RxDMABurstThresh = 0x14,
246 RxDMAUrgentThresh = 0x15,
247 RxDMAPollPeriod = 0x16,
248 LEDCtrl = 0x1a,
249 ASICCtrl = 0x30,
250 EEData = 0x34,
251 EECtrl = 0x36,
252 FlashAddr = 0x40,
253 FlashData = 0x44,
254 WakeEvent = 0x45,
255 TxStatus = 0x46,
256 TxFrameId = 0x47,
257 DownCounter = 0x18,
258 IntrClear = 0x4a,
259 IntrEnable = 0x4c,
260 IntrStatus = 0x4e,
261 MACCtrl0 = 0x50,
262 MACCtrl1 = 0x52,
263 StationAddr = 0x54,
264 MaxFrameSize = 0x5A,
265 RxMode = 0x5c,
266 MIICtrl = 0x5e,
267 MulticastFilter0 = 0x60,
268 MulticastFilter1 = 0x64,
269 RxOctetsLow = 0x68,
270 RxOctetsHigh = 0x6a,
271 TxOctetsLow = 0x6c,
272 TxOctetsHigh = 0x6e,
273 TxFramesOK = 0x70,
274 RxFramesOK = 0x72,
275 StatsCarrierError = 0x74,
276 StatsLateColl = 0x75,
277 StatsMultiColl = 0x76,
278 StatsOneColl = 0x77,
279 StatsTxDefer = 0x78,
280 RxMissed = 0x79,
281 StatsTxXSDefer = 0x7a,
282 StatsTxAbort = 0x7b,
283 StatsBcastTx = 0x7c,
284 StatsBcastRx = 0x7d,
285 StatsMcastTx = 0x7e,
286 StatsMcastRx = 0x7f,
287 /* Aliased and bogus values! */
288 RxStatus = 0x0c,
289 };
290
291 #define ASIC_HI_WORD(x) ((x) + 2)
292
293 enum ASICCtrl_HiWord_bit {
294 GlobalReset = 0x0001,
295 RxReset = 0x0002,
296 TxReset = 0x0004,
297 DMAReset = 0x0008,
298 FIFOReset = 0x0010,
299 NetworkReset = 0x0020,
300 HostReset = 0x0040,
301 ResetBusy = 0x0400,
302 };
303
304 /* Bits in the interrupt status/mask registers. */
305 enum intr_status_bits {
306 IntrSummary=0x0001, IntrPCIErr=0x0002, IntrMACCtrl=0x0008,
307 IntrTxDone=0x0004, IntrRxDone=0x0010, IntrRxStart=0x0020,
308 IntrDrvRqst=0x0040,
309 StatsMax=0x0080, LinkChange=0x0100,
310 IntrTxDMADone=0x0200, IntrRxDMADone=0x0400,
311 };
312
313 /* Bits in the RxMode register. */
314 enum rx_mode_bits {
315 AcceptAllIPMulti=0x20, AcceptMultiHash=0x10, AcceptAll=0x08,
316 AcceptBroadcast=0x04, AcceptMulticast=0x02, AcceptMyPhys=0x01,
317 };
318 /* Bits in MACCtrl. */
319 enum mac_ctrl0_bits {
320 EnbFullDuplex=0x20, EnbRcvLargeFrame=0x40,
321 EnbFlowCtrl=0x100, EnbPassRxCRC=0x200,
322 };
323 enum mac_ctrl1_bits {
324 StatsEnable=0x0020, StatsDisable=0x0040, StatsEnabled=0x0080,
325 TxEnable=0x0100, TxDisable=0x0200, TxEnabled=0x0400,
326 RxEnable=0x0800, RxDisable=0x1000, RxEnabled=0x2000,
327 };
328
329 /* Bits in WakeEvent register. */
330 enum wake_event_bits {
331 WakePktEnable = 0x01,
332 MagicPktEnable = 0x02,
333 LinkEventEnable = 0x04,
334 WolEnable = 0x80,
335 };
336
337 /* The Rx and Tx buffer descriptors. */
338 /* Note that using only 32 bit fields simplifies conversion to big-endian
339 architectures. */
340 struct netdev_desc {
341 __le32 next_desc;
342 __le32 status;
343 struct desc_frag { __le32 addr, length; } frag;
344 };
345
346 /* Bits in netdev_desc.status */
347 enum desc_status_bits {
348 DescOwn=0x8000,
349 DescEndPacket=0x4000,
350 DescEndRing=0x2000,
351 LastFrag=0x80000000,
352 DescIntrOnTx=0x8000,
353 DescIntrOnDMADone=0x80000000,
354 DisableAlign = 0x00000001,
355 };
356
357 #define PRIV_ALIGN 15 /* Required alignment mask */
358 /* Use __attribute__((aligned (L1_CACHE_BYTES))) to maintain alignment
359 within the structure. */
360 #define MII_CNT 4
361 struct netdev_private {
362 /* Descriptor rings first for alignment. */
363 struct netdev_desc *rx_ring;
364 struct netdev_desc *tx_ring;
365 struct sk_buff* rx_skbuff[RX_RING_SIZE];
366 struct sk_buff* tx_skbuff[TX_RING_SIZE];
367 dma_addr_t tx_ring_dma;
368 dma_addr_t rx_ring_dma;
369 struct timer_list timer; /* Media monitoring timer. */
370 struct net_device *ndev; /* backpointer */
371 /* ethtool extra stats */
372 struct {
373 u64 tx_multiple_collisions;
374 u64 tx_single_collisions;
375 u64 tx_late_collisions;
376 u64 tx_deferred;
377 u64 tx_deferred_excessive;
378 u64 tx_aborted;
379 u64 tx_bcasts;
380 u64 rx_bcasts;
381 u64 tx_mcasts;
382 u64 rx_mcasts;
383 } xstats;
384 /* Frequently used values: keep some adjacent for cache effect. */
385 spinlock_t lock;
386 int msg_enable;
387 int chip_id;
388 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
389 unsigned int rx_buf_sz; /* Based on MTU+slack. */
390 struct netdev_desc *last_tx; /* Last Tx descriptor used. */
391 unsigned int cur_tx, dirty_tx;
392 /* These values are keep track of the transceiver/media in use. */
393 unsigned int flowctrl:1;
394 unsigned int default_port:4; /* Last dev->if_port value. */
395 unsigned int an_enable:1;
396 unsigned int speed;
397 unsigned int wol_enabled:1; /* Wake on LAN enabled */
398 struct tasklet_struct rx_tasklet;
399 struct tasklet_struct tx_tasklet;
400 int budget;
401 int cur_task;
402 /* Multicast and receive mode. */
403 spinlock_t mcastlock; /* SMP lock multicast updates. */
404 u16 mcast_filter[4];
405 /* MII transceiver section. */
406 struct mii_if_info mii_if;
407 int mii_preamble_required;
408 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
409 struct pci_dev *pci_dev;
410 void __iomem *base;
411 spinlock_t statlock;
412 };
413
414 /* The station address location in the EEPROM. */
415 #define EEPROM_SA_OFFSET 0x10
416 #define DEFAULT_INTR (IntrRxDMADone | IntrPCIErr | \
417 IntrDrvRqst | IntrTxDone | StatsMax | \
418 LinkChange)
419
420 static int change_mtu(struct net_device *dev, int new_mtu);
421 static int eeprom_read(void __iomem *ioaddr, int location);
422 static int mdio_read(struct net_device *dev, int phy_id, int location);
423 static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
424 static int mdio_wait_link(struct net_device *dev, int wait);
425 static int netdev_open(struct net_device *dev);
426 static void check_duplex(struct net_device *dev);
427 static void netdev_timer(struct timer_list *t);
428 static void tx_timeout(struct net_device *dev, unsigned int txqueue);
429 static void init_ring(struct net_device *dev);
430 static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev);
431 static int reset_tx (struct net_device *dev);
432 static irqreturn_t intr_handler(int irq, void *dev_instance);
433 static void rx_poll(struct tasklet_struct *t);
434 static void tx_poll(struct tasklet_struct *t);
435 static void refill_rx (struct net_device *dev);
436 static void netdev_error(struct net_device *dev, int intr_status);
437 static void netdev_error(struct net_device *dev, int intr_status);
438 static void set_rx_mode(struct net_device *dev);
439 static int __set_mac_addr(struct net_device *dev);
440 static int sundance_set_mac_addr(struct net_device *dev, void *data);
441 static struct net_device_stats *get_stats(struct net_device *dev);
442 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
443 static int netdev_close(struct net_device *dev);
444 static const struct ethtool_ops ethtool_ops;
445
sundance_reset(struct net_device * dev,unsigned long reset_cmd)446 static void sundance_reset(struct net_device *dev, unsigned long reset_cmd)
447 {
448 struct netdev_private *np = netdev_priv(dev);
449 void __iomem *ioaddr = np->base + ASICCtrl;
450 int countdown;
451
452 /* ST201 documentation states ASICCtrl is a 32bit register */
453 iowrite32 (reset_cmd | ioread32 (ioaddr), ioaddr);
454 /* ST201 documentation states reset can take up to 1 ms */
455 countdown = 10 + 1;
456 while (ioread32 (ioaddr) & (ResetBusy << 16)) {
457 if (--countdown == 0) {
458 printk(KERN_WARNING "%s : reset not completed !!\n", dev->name);
459 break;
460 }
461 udelay(100);
462 }
463 }
464
465 #ifdef CONFIG_NET_POLL_CONTROLLER
sundance_poll_controller(struct net_device * dev)466 static void sundance_poll_controller(struct net_device *dev)
467 {
468 struct netdev_private *np = netdev_priv(dev);
469
470 disable_irq(np->pci_dev->irq);
471 intr_handler(np->pci_dev->irq, dev);
472 enable_irq(np->pci_dev->irq);
473 }
474 #endif
475
476 static const struct net_device_ops netdev_ops = {
477 .ndo_open = netdev_open,
478 .ndo_stop = netdev_close,
479 .ndo_start_xmit = start_tx,
480 .ndo_get_stats = get_stats,
481 .ndo_set_rx_mode = set_rx_mode,
482 .ndo_eth_ioctl = netdev_ioctl,
483 .ndo_tx_timeout = tx_timeout,
484 .ndo_change_mtu = change_mtu,
485 .ndo_set_mac_address = sundance_set_mac_addr,
486 .ndo_validate_addr = eth_validate_addr,
487 #ifdef CONFIG_NET_POLL_CONTROLLER
488 .ndo_poll_controller = sundance_poll_controller,
489 #endif
490 };
491
sundance_probe1(struct pci_dev * pdev,const struct pci_device_id * ent)492 static int sundance_probe1(struct pci_dev *pdev,
493 const struct pci_device_id *ent)
494 {
495 struct net_device *dev;
496 struct netdev_private *np;
497 static int card_idx;
498 int chip_idx = ent->driver_data;
499 int irq;
500 int i;
501 void __iomem *ioaddr;
502 u16 mii_ctl;
503 void *ring_space;
504 dma_addr_t ring_dma;
505 #ifdef USE_IO_OPS
506 int bar = 0;
507 #else
508 int bar = 1;
509 #endif
510 int phy, phy_end, phy_idx = 0;
511 __le16 addr[ETH_ALEN / 2];
512
513 if (pci_enable_device(pdev))
514 return -EIO;
515 pci_set_master(pdev);
516
517 irq = pdev->irq;
518
519 dev = alloc_etherdev(sizeof(*np));
520 if (!dev)
521 return -ENOMEM;
522 SET_NETDEV_DEV(dev, &pdev->dev);
523
524 if (pci_request_regions(pdev, DRV_NAME))
525 goto err_out_netdev;
526
527 ioaddr = pci_iomap(pdev, bar, netdev_io_size);
528 if (!ioaddr)
529 goto err_out_res;
530
531 for (i = 0; i < 3; i++)
532 addr[i] =
533 cpu_to_le16(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET));
534 eth_hw_addr_set(dev, (u8 *)addr);
535
536 np = netdev_priv(dev);
537 np->ndev = dev;
538 np->base = ioaddr;
539 np->pci_dev = pdev;
540 np->chip_id = chip_idx;
541 np->msg_enable = (1 << debug) - 1;
542 spin_lock_init(&np->lock);
543 spin_lock_init(&np->statlock);
544 tasklet_setup(&np->rx_tasklet, rx_poll);
545 tasklet_setup(&np->tx_tasklet, tx_poll);
546
547 ring_space = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE,
548 &ring_dma, GFP_KERNEL);
549 if (!ring_space)
550 goto err_out_cleardev;
551 np->tx_ring = (struct netdev_desc *)ring_space;
552 np->tx_ring_dma = ring_dma;
553
554 ring_space = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE,
555 &ring_dma, GFP_KERNEL);
556 if (!ring_space)
557 goto err_out_unmap_tx;
558 np->rx_ring = (struct netdev_desc *)ring_space;
559 np->rx_ring_dma = ring_dma;
560
561 np->mii_if.dev = dev;
562 np->mii_if.mdio_read = mdio_read;
563 np->mii_if.mdio_write = mdio_write;
564 np->mii_if.phy_id_mask = 0x1f;
565 np->mii_if.reg_num_mask = 0x1f;
566
567 /* The chip-specific entries in the device structure. */
568 dev->netdev_ops = &netdev_ops;
569 dev->ethtool_ops = ðtool_ops;
570 dev->watchdog_timeo = TX_TIMEOUT;
571
572 /* MTU range: 68 - 8191 */
573 dev->min_mtu = ETH_MIN_MTU;
574 dev->max_mtu = 8191;
575
576 pci_set_drvdata(pdev, dev);
577
578 i = register_netdev(dev);
579 if (i)
580 goto err_out_unmap_rx;
581
582 printk(KERN_INFO "%s: %s at %p, %pM, IRQ %d.\n",
583 dev->name, pci_id_tbl[chip_idx].name, ioaddr,
584 dev->dev_addr, irq);
585
586 np->phys[0] = 1; /* Default setting */
587 np->mii_preamble_required++;
588
589 /*
590 * It seems some phys doesn't deal well with address 0 being accessed
591 * first
592 */
593 if (sundance_pci_tbl[np->chip_id].device == 0x0200) {
594 phy = 0;
595 phy_end = 31;
596 } else {
597 phy = 1;
598 phy_end = 32; /* wraps to zero, due to 'phy & 0x1f' */
599 }
600 for (; phy <= phy_end && phy_idx < MII_CNT; phy++) {
601 int phyx = phy & 0x1f;
602 int mii_status = mdio_read(dev, phyx, MII_BMSR);
603 if (mii_status != 0xffff && mii_status != 0x0000) {
604 np->phys[phy_idx++] = phyx;
605 np->mii_if.advertising = mdio_read(dev, phyx, MII_ADVERTISE);
606 if ((mii_status & 0x0040) == 0)
607 np->mii_preamble_required++;
608 printk(KERN_INFO "%s: MII PHY found at address %d, status "
609 "0x%4.4x advertising %4.4x.\n",
610 dev->name, phyx, mii_status, np->mii_if.advertising);
611 }
612 }
613 np->mii_preamble_required--;
614
615 if (phy_idx == 0) {
616 printk(KERN_INFO "%s: No MII transceiver found, aborting. ASIC status %x\n",
617 dev->name, ioread32(ioaddr + ASICCtrl));
618 goto err_out_unregister;
619 }
620
621 np->mii_if.phy_id = np->phys[0];
622
623 /* Parse override configuration */
624 np->an_enable = 1;
625 if (card_idx < MAX_UNITS) {
626 if (media[card_idx] != NULL) {
627 np->an_enable = 0;
628 if (strcmp (media[card_idx], "100mbps_fd") == 0 ||
629 strcmp (media[card_idx], "4") == 0) {
630 np->speed = 100;
631 np->mii_if.full_duplex = 1;
632 } else if (strcmp (media[card_idx], "100mbps_hd") == 0 ||
633 strcmp (media[card_idx], "3") == 0) {
634 np->speed = 100;
635 np->mii_if.full_duplex = 0;
636 } else if (strcmp (media[card_idx], "10mbps_fd") == 0 ||
637 strcmp (media[card_idx], "2") == 0) {
638 np->speed = 10;
639 np->mii_if.full_duplex = 1;
640 } else if (strcmp (media[card_idx], "10mbps_hd") == 0 ||
641 strcmp (media[card_idx], "1") == 0) {
642 np->speed = 10;
643 np->mii_if.full_duplex = 0;
644 } else {
645 np->an_enable = 1;
646 }
647 }
648 if (flowctrl == 1)
649 np->flowctrl = 1;
650 }
651
652 /* Fibre PHY? */
653 if (ioread32 (ioaddr + ASICCtrl) & 0x80) {
654 /* Default 100Mbps Full */
655 if (np->an_enable) {
656 np->speed = 100;
657 np->mii_if.full_duplex = 1;
658 np->an_enable = 0;
659 }
660 }
661 /* Reset PHY */
662 mdio_write (dev, np->phys[0], MII_BMCR, BMCR_RESET);
663 mdelay (300);
664 /* If flow control enabled, we need to advertise it.*/
665 if (np->flowctrl)
666 mdio_write (dev, np->phys[0], MII_ADVERTISE, np->mii_if.advertising | 0x0400);
667 mdio_write (dev, np->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
668 /* Force media type */
669 if (!np->an_enable) {
670 mii_ctl = 0;
671 mii_ctl |= (np->speed == 100) ? BMCR_SPEED100 : 0;
672 mii_ctl |= (np->mii_if.full_duplex) ? BMCR_FULLDPLX : 0;
673 mdio_write (dev, np->phys[0], MII_BMCR, mii_ctl);
674 printk (KERN_INFO "Override speed=%d, %s duplex\n",
675 np->speed, np->mii_if.full_duplex ? "Full" : "Half");
676
677 }
678
679 /* Perhaps move the reset here? */
680 /* Reset the chip to erase previous misconfiguration. */
681 if (netif_msg_hw(np))
682 printk("ASIC Control is %x.\n", ioread32(ioaddr + ASICCtrl));
683 sundance_reset(dev, 0x00ff << 16);
684 if (netif_msg_hw(np))
685 printk("ASIC Control is now %x.\n", ioread32(ioaddr + ASICCtrl));
686
687 card_idx++;
688 return 0;
689
690 err_out_unregister:
691 unregister_netdev(dev);
692 err_out_unmap_rx:
693 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE,
694 np->rx_ring, np->rx_ring_dma);
695 err_out_unmap_tx:
696 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE,
697 np->tx_ring, np->tx_ring_dma);
698 err_out_cleardev:
699 pci_iounmap(pdev, ioaddr);
700 err_out_res:
701 pci_release_regions(pdev);
702 err_out_netdev:
703 free_netdev (dev);
704 return -ENODEV;
705 }
706
change_mtu(struct net_device * dev,int new_mtu)707 static int change_mtu(struct net_device *dev, int new_mtu)
708 {
709 if (netif_running(dev))
710 return -EBUSY;
711 WRITE_ONCE(dev->mtu, new_mtu);
712 return 0;
713 }
714
715 #define eeprom_delay(ee_addr) ioread32(ee_addr)
716 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. */
eeprom_read(void __iomem * ioaddr,int location)717 static int eeprom_read(void __iomem *ioaddr, int location)
718 {
719 int boguscnt = 10000; /* Typical 1900 ticks. */
720 iowrite16(0x0200 | (location & 0xff), ioaddr + EECtrl);
721 do {
722 eeprom_delay(ioaddr + EECtrl);
723 if (! (ioread16(ioaddr + EECtrl) & 0x8000)) {
724 return ioread16(ioaddr + EEData);
725 }
726 } while (--boguscnt > 0);
727 return 0;
728 }
729
730 /* MII transceiver control section.
731 Read and write the MII registers using software-generated serial
732 MDIO protocol. See the MII specifications or DP83840A data sheet
733 for details.
734
735 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
736 met by back-to-back 33Mhz PCI cycles. */
737 #define mdio_delay() ioread8(mdio_addr)
738
739 enum mii_reg_bits {
740 MDIO_ShiftClk=0x0001, MDIO_Data=0x0002, MDIO_EnbOutput=0x0004,
741 };
742 #define MDIO_EnbIn (0)
743 #define MDIO_WRITE0 (MDIO_EnbOutput)
744 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
745
746 /* Generate the preamble required for initial synchronization and
747 a few older transceivers. */
mdio_sync(void __iomem * mdio_addr)748 static void mdio_sync(void __iomem *mdio_addr)
749 {
750 int bits = 32;
751
752 /* Establish sync by sending at least 32 logic ones. */
753 while (--bits >= 0) {
754 iowrite8(MDIO_WRITE1, mdio_addr);
755 mdio_delay();
756 iowrite8(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
757 mdio_delay();
758 }
759 }
760
mdio_read(struct net_device * dev,int phy_id,int location)761 static int mdio_read(struct net_device *dev, int phy_id, int location)
762 {
763 struct netdev_private *np = netdev_priv(dev);
764 void __iomem *mdio_addr = np->base + MIICtrl;
765 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
766 int i, retval = 0;
767
768 if (np->mii_preamble_required)
769 mdio_sync(mdio_addr);
770
771 /* Shift the read command bits out. */
772 for (i = 15; i >= 0; i--) {
773 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
774
775 iowrite8(dataval, mdio_addr);
776 mdio_delay();
777 iowrite8(dataval | MDIO_ShiftClk, mdio_addr);
778 mdio_delay();
779 }
780 /* Read the two transition, 16 data, and wire-idle bits. */
781 for (i = 19; i > 0; i--) {
782 iowrite8(MDIO_EnbIn, mdio_addr);
783 mdio_delay();
784 retval = (retval << 1) | ((ioread8(mdio_addr) & MDIO_Data) ? 1 : 0);
785 iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
786 mdio_delay();
787 }
788 return (retval>>1) & 0xffff;
789 }
790
mdio_write(struct net_device * dev,int phy_id,int location,int value)791 static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
792 {
793 struct netdev_private *np = netdev_priv(dev);
794 void __iomem *mdio_addr = np->base + MIICtrl;
795 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
796 int i;
797
798 if (np->mii_preamble_required)
799 mdio_sync(mdio_addr);
800
801 /* Shift the command bits out. */
802 for (i = 31; i >= 0; i--) {
803 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
804
805 iowrite8(dataval, mdio_addr);
806 mdio_delay();
807 iowrite8(dataval | MDIO_ShiftClk, mdio_addr);
808 mdio_delay();
809 }
810 /* Clear out extra bits. */
811 for (i = 2; i > 0; i--) {
812 iowrite8(MDIO_EnbIn, mdio_addr);
813 mdio_delay();
814 iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
815 mdio_delay();
816 }
817 }
818
mdio_wait_link(struct net_device * dev,int wait)819 static int mdio_wait_link(struct net_device *dev, int wait)
820 {
821 int bmsr;
822 int phy_id;
823 struct netdev_private *np;
824
825 np = netdev_priv(dev);
826 phy_id = np->phys[0];
827
828 do {
829 bmsr = mdio_read(dev, phy_id, MII_BMSR);
830 if (bmsr & 0x0004)
831 return 0;
832 mdelay(1);
833 } while (--wait > 0);
834 return -1;
835 }
836
netdev_open(struct net_device * dev)837 static int netdev_open(struct net_device *dev)
838 {
839 struct netdev_private *np = netdev_priv(dev);
840 void __iomem *ioaddr = np->base;
841 const int irq = np->pci_dev->irq;
842 unsigned long flags;
843 int i;
844
845 sundance_reset(dev, 0x00ff << 16);
846
847 i = request_irq(irq, intr_handler, IRQF_SHARED, dev->name, dev);
848 if (i)
849 return i;
850
851 if (netif_msg_ifup(np))
852 printk(KERN_DEBUG "%s: netdev_open() irq %d\n", dev->name, irq);
853
854 init_ring(dev);
855
856 iowrite32(np->rx_ring_dma, ioaddr + RxListPtr);
857 /* The Tx list pointer is written as packets are queued. */
858
859 /* Initialize other registers. */
860 __set_mac_addr(dev);
861 #if IS_ENABLED(CONFIG_VLAN_8021Q)
862 iowrite16(dev->mtu + 18, ioaddr + MaxFrameSize);
863 #else
864 iowrite16(dev->mtu + 14, ioaddr + MaxFrameSize);
865 #endif
866 if (dev->mtu > 2047)
867 iowrite32(ioread32(ioaddr + ASICCtrl) | 0x0C, ioaddr + ASICCtrl);
868
869 /* Configure the PCI bus bursts and FIFO thresholds. */
870
871 if (dev->if_port == 0)
872 dev->if_port = np->default_port;
873
874 spin_lock_init(&np->mcastlock);
875
876 set_rx_mode(dev);
877 iowrite16(0, ioaddr + IntrEnable);
878 iowrite16(0, ioaddr + DownCounter);
879 /* Set the chip to poll every N*320nsec. */
880 iowrite8(100, ioaddr + RxDMAPollPeriod);
881 iowrite8(127, ioaddr + TxDMAPollPeriod);
882 /* Fix DFE-580TX packet drop issue */
883 if (np->pci_dev->revision >= 0x14)
884 iowrite8(0x01, ioaddr + DebugCtrl1);
885 netif_start_queue(dev);
886
887 spin_lock_irqsave(&np->lock, flags);
888 reset_tx(dev);
889 spin_unlock_irqrestore(&np->lock, flags);
890
891 iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
892
893 /* Disable Wol */
894 iowrite8(ioread8(ioaddr + WakeEvent) | 0x00, ioaddr + WakeEvent);
895 np->wol_enabled = 0;
896
897 if (netif_msg_ifup(np))
898 printk(KERN_DEBUG "%s: Done netdev_open(), status: Rx %x Tx %x "
899 "MAC Control %x, %4.4x %4.4x.\n",
900 dev->name, ioread32(ioaddr + RxStatus), ioread8(ioaddr + TxStatus),
901 ioread32(ioaddr + MACCtrl0),
902 ioread16(ioaddr + MACCtrl1), ioread16(ioaddr + MACCtrl0));
903
904 /* Set the timer to check for link beat. */
905 timer_setup(&np->timer, netdev_timer, 0);
906 np->timer.expires = jiffies + 3*HZ;
907 add_timer(&np->timer);
908
909 /* Enable interrupts by setting the interrupt mask. */
910 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
911
912 return 0;
913 }
914
check_duplex(struct net_device * dev)915 static void check_duplex(struct net_device *dev)
916 {
917 struct netdev_private *np = netdev_priv(dev);
918 void __iomem *ioaddr = np->base;
919 int mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
920 int negotiated = mii_lpa & np->mii_if.advertising;
921 int duplex;
922
923 /* Force media */
924 if (!np->an_enable || mii_lpa == 0xffff) {
925 if (np->mii_if.full_duplex)
926 iowrite16 (ioread16 (ioaddr + MACCtrl0) | EnbFullDuplex,
927 ioaddr + MACCtrl0);
928 return;
929 }
930
931 /* Autonegotiation */
932 duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
933 if (np->mii_if.full_duplex != duplex) {
934 np->mii_if.full_duplex = duplex;
935 if (netif_msg_link(np))
936 printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
937 "negotiated capability %4.4x.\n", dev->name,
938 duplex ? "full" : "half", np->phys[0], negotiated);
939 iowrite16(ioread16(ioaddr + MACCtrl0) | (duplex ? 0x20 : 0), ioaddr + MACCtrl0);
940 }
941 }
942
netdev_timer(struct timer_list * t)943 static void netdev_timer(struct timer_list *t)
944 {
945 struct netdev_private *np = from_timer(np, t, timer);
946 struct net_device *dev = np->mii_if.dev;
947 void __iomem *ioaddr = np->base;
948 int next_tick = 10*HZ;
949
950 if (netif_msg_timer(np)) {
951 printk(KERN_DEBUG "%s: Media selection timer tick, intr status %4.4x, "
952 "Tx %x Rx %x.\n",
953 dev->name, ioread16(ioaddr + IntrEnable),
954 ioread8(ioaddr + TxStatus), ioread32(ioaddr + RxStatus));
955 }
956 check_duplex(dev);
957 np->timer.expires = jiffies + next_tick;
958 add_timer(&np->timer);
959 }
960
tx_timeout(struct net_device * dev,unsigned int txqueue)961 static void tx_timeout(struct net_device *dev, unsigned int txqueue)
962 {
963 struct netdev_private *np = netdev_priv(dev);
964 void __iomem *ioaddr = np->base;
965 unsigned long flag;
966
967 netif_stop_queue(dev);
968 tasklet_disable_in_atomic(&np->tx_tasklet);
969 iowrite16(0, ioaddr + IntrEnable);
970 printk(KERN_WARNING "%s: Transmit timed out, TxStatus %2.2x "
971 "TxFrameId %2.2x,"
972 " resetting...\n", dev->name, ioread8(ioaddr + TxStatus),
973 ioread8(ioaddr + TxFrameId));
974
975 {
976 int i;
977 for (i=0; i<TX_RING_SIZE; i++) {
978 printk(KERN_DEBUG "%02x %08llx %08x %08x(%02x) %08x %08x\n", i,
979 (unsigned long long)(np->tx_ring_dma + i*sizeof(*np->tx_ring)),
980 le32_to_cpu(np->tx_ring[i].next_desc),
981 le32_to_cpu(np->tx_ring[i].status),
982 (le32_to_cpu(np->tx_ring[i].status) >> 2) & 0xff,
983 le32_to_cpu(np->tx_ring[i].frag.addr),
984 le32_to_cpu(np->tx_ring[i].frag.length));
985 }
986 printk(KERN_DEBUG "TxListPtr=%08x netif_queue_stopped=%d\n",
987 ioread32(np->base + TxListPtr),
988 netif_queue_stopped(dev));
989 printk(KERN_DEBUG "cur_tx=%d(%02x) dirty_tx=%d(%02x)\n",
990 np->cur_tx, np->cur_tx % TX_RING_SIZE,
991 np->dirty_tx, np->dirty_tx % TX_RING_SIZE);
992 printk(KERN_DEBUG "cur_rx=%d dirty_rx=%d\n", np->cur_rx, np->dirty_rx);
993 printk(KERN_DEBUG "cur_task=%d\n", np->cur_task);
994 }
995 spin_lock_irqsave(&np->lock, flag);
996
997 /* Stop and restart the chip's Tx processes . */
998 reset_tx(dev);
999 spin_unlock_irqrestore(&np->lock, flag);
1000
1001 dev->if_port = 0;
1002
1003 netif_trans_update(dev); /* prevent tx timeout */
1004 dev->stats.tx_errors++;
1005 if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
1006 netif_wake_queue(dev);
1007 }
1008 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
1009 tasklet_enable(&np->tx_tasklet);
1010 }
1011
1012
1013 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
init_ring(struct net_device * dev)1014 static void init_ring(struct net_device *dev)
1015 {
1016 struct netdev_private *np = netdev_priv(dev);
1017 int i;
1018
1019 np->cur_rx = np->cur_tx = 0;
1020 np->dirty_rx = np->dirty_tx = 0;
1021 np->cur_task = 0;
1022
1023 np->rx_buf_sz = (dev->mtu <= 1520 ? PKT_BUF_SZ : dev->mtu + 16);
1024
1025 /* Initialize all Rx descriptors. */
1026 for (i = 0; i < RX_RING_SIZE; i++) {
1027 np->rx_ring[i].next_desc = cpu_to_le32(np->rx_ring_dma +
1028 ((i+1)%RX_RING_SIZE)*sizeof(*np->rx_ring));
1029 np->rx_ring[i].status = 0;
1030 np->rx_ring[i].frag.length = 0;
1031 np->rx_skbuff[i] = NULL;
1032 }
1033
1034 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1035 for (i = 0; i < RX_RING_SIZE; i++) {
1036 struct sk_buff *skb =
1037 netdev_alloc_skb(dev, np->rx_buf_sz + 2);
1038 np->rx_skbuff[i] = skb;
1039 if (skb == NULL)
1040 break;
1041 skb_reserve(skb, 2); /* 16 byte align the IP header. */
1042 np->rx_ring[i].frag.addr = cpu_to_le32(
1043 dma_map_single(&np->pci_dev->dev, skb->data,
1044 np->rx_buf_sz, DMA_FROM_DEVICE));
1045 if (dma_mapping_error(&np->pci_dev->dev,
1046 np->rx_ring[i].frag.addr)) {
1047 dev_kfree_skb(skb);
1048 np->rx_skbuff[i] = NULL;
1049 break;
1050 }
1051 np->rx_ring[i].frag.length = cpu_to_le32(np->rx_buf_sz | LastFrag);
1052 }
1053 np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1054
1055 for (i = 0; i < TX_RING_SIZE; i++) {
1056 np->tx_skbuff[i] = NULL;
1057 np->tx_ring[i].status = 0;
1058 }
1059 }
1060
tx_poll(struct tasklet_struct * t)1061 static void tx_poll(struct tasklet_struct *t)
1062 {
1063 struct netdev_private *np = from_tasklet(np, t, tx_tasklet);
1064 unsigned head = np->cur_task % TX_RING_SIZE;
1065 struct netdev_desc *txdesc =
1066 &np->tx_ring[(np->cur_tx - 1) % TX_RING_SIZE];
1067
1068 /* Chain the next pointer */
1069 for (; np->cur_tx - np->cur_task > 0; np->cur_task++) {
1070 int entry = np->cur_task % TX_RING_SIZE;
1071 txdesc = &np->tx_ring[entry];
1072 if (np->last_tx) {
1073 np->last_tx->next_desc = cpu_to_le32(np->tx_ring_dma +
1074 entry*sizeof(struct netdev_desc));
1075 }
1076 np->last_tx = txdesc;
1077 }
1078 /* Indicate the latest descriptor of tx ring */
1079 txdesc->status |= cpu_to_le32(DescIntrOnTx);
1080
1081 if (ioread32 (np->base + TxListPtr) == 0)
1082 iowrite32 (np->tx_ring_dma + head * sizeof(struct netdev_desc),
1083 np->base + TxListPtr);
1084 }
1085
1086 static netdev_tx_t
start_tx(struct sk_buff * skb,struct net_device * dev)1087 start_tx (struct sk_buff *skb, struct net_device *dev)
1088 {
1089 struct netdev_private *np = netdev_priv(dev);
1090 struct netdev_desc *txdesc;
1091 unsigned entry;
1092
1093 /* Calculate the next Tx descriptor entry. */
1094 entry = np->cur_tx % TX_RING_SIZE;
1095 np->tx_skbuff[entry] = skb;
1096 txdesc = &np->tx_ring[entry];
1097
1098 txdesc->next_desc = 0;
1099 txdesc->status = cpu_to_le32 ((entry << 2) | DisableAlign);
1100 txdesc->frag.addr = cpu_to_le32(dma_map_single(&np->pci_dev->dev,
1101 skb->data, skb->len, DMA_TO_DEVICE));
1102 if (dma_mapping_error(&np->pci_dev->dev,
1103 txdesc->frag.addr))
1104 goto drop_frame;
1105 txdesc->frag.length = cpu_to_le32 (skb->len | LastFrag);
1106
1107 /* Increment cur_tx before tasklet_schedule() */
1108 np->cur_tx++;
1109 mb();
1110 /* Schedule a tx_poll() task */
1111 tasklet_schedule(&np->tx_tasklet);
1112
1113 /* On some architectures: explicitly flush cache lines here. */
1114 if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 1 &&
1115 !netif_queue_stopped(dev)) {
1116 /* do nothing */
1117 } else {
1118 netif_stop_queue (dev);
1119 }
1120 if (netif_msg_tx_queued(np)) {
1121 printk (KERN_DEBUG
1122 "%s: Transmit frame #%d queued in slot %d.\n",
1123 dev->name, np->cur_tx, entry);
1124 }
1125 return NETDEV_TX_OK;
1126
1127 drop_frame:
1128 dev_kfree_skb_any(skb);
1129 np->tx_skbuff[entry] = NULL;
1130 dev->stats.tx_dropped++;
1131 return NETDEV_TX_OK;
1132 }
1133
1134 /* Reset hardware tx and free all of tx buffers */
1135 static int
reset_tx(struct net_device * dev)1136 reset_tx (struct net_device *dev)
1137 {
1138 struct netdev_private *np = netdev_priv(dev);
1139 void __iomem *ioaddr = np->base;
1140 struct sk_buff *skb;
1141 int i;
1142
1143 /* Reset tx logic, TxListPtr will be cleaned */
1144 iowrite16 (TxDisable, ioaddr + MACCtrl1);
1145 sundance_reset(dev, (NetworkReset|FIFOReset|DMAReset|TxReset) << 16);
1146
1147 /* free all tx skbuff */
1148 for (i = 0; i < TX_RING_SIZE; i++) {
1149 np->tx_ring[i].next_desc = 0;
1150
1151 skb = np->tx_skbuff[i];
1152 if (skb) {
1153 dma_unmap_single(&np->pci_dev->dev,
1154 le32_to_cpu(np->tx_ring[i].frag.addr),
1155 skb->len, DMA_TO_DEVICE);
1156 dev_kfree_skb_any(skb);
1157 np->tx_skbuff[i] = NULL;
1158 dev->stats.tx_dropped++;
1159 }
1160 }
1161 np->cur_tx = np->dirty_tx = 0;
1162 np->cur_task = 0;
1163
1164 np->last_tx = NULL;
1165 iowrite8(127, ioaddr + TxDMAPollPeriod);
1166
1167 iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
1168 return 0;
1169 }
1170
1171 /* The interrupt handler cleans up after the Tx thread,
1172 and schedule a Rx thread work */
intr_handler(int irq,void * dev_instance)1173 static irqreturn_t intr_handler(int irq, void *dev_instance)
1174 {
1175 struct net_device *dev = (struct net_device *)dev_instance;
1176 struct netdev_private *np = netdev_priv(dev);
1177 void __iomem *ioaddr = np->base;
1178 int hw_frame_id;
1179 int tx_cnt;
1180 int tx_status;
1181 int handled = 0;
1182 int i;
1183
1184 do {
1185 int intr_status = ioread16(ioaddr + IntrStatus);
1186 iowrite16(intr_status, ioaddr + IntrStatus);
1187
1188 if (netif_msg_intr(np))
1189 printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
1190 dev->name, intr_status);
1191
1192 if (!(intr_status & DEFAULT_INTR))
1193 break;
1194
1195 handled = 1;
1196
1197 if (intr_status & (IntrRxDMADone)) {
1198 iowrite16(DEFAULT_INTR & ~(IntrRxDone|IntrRxDMADone),
1199 ioaddr + IntrEnable);
1200 if (np->budget < 0)
1201 np->budget = RX_BUDGET;
1202 tasklet_schedule(&np->rx_tasklet);
1203 }
1204 if (intr_status & (IntrTxDone | IntrDrvRqst)) {
1205 tx_status = ioread16 (ioaddr + TxStatus);
1206 for (tx_cnt=32; tx_status & 0x80; --tx_cnt) {
1207 if (netif_msg_tx_done(np))
1208 printk
1209 ("%s: Transmit status is %2.2x.\n",
1210 dev->name, tx_status);
1211 if (tx_status & 0x1e) {
1212 if (netif_msg_tx_err(np))
1213 printk("%s: Transmit error status %4.4x.\n",
1214 dev->name, tx_status);
1215 dev->stats.tx_errors++;
1216 if (tx_status & 0x10)
1217 dev->stats.tx_fifo_errors++;
1218 if (tx_status & 0x08)
1219 dev->stats.collisions++;
1220 if (tx_status & 0x04)
1221 dev->stats.tx_fifo_errors++;
1222 if (tx_status & 0x02)
1223 dev->stats.tx_window_errors++;
1224
1225 /*
1226 ** This reset has been verified on
1227 ** DFE-580TX boards ! phdm@macqel.be.
1228 */
1229 if (tx_status & 0x10) { /* TxUnderrun */
1230 /* Restart Tx FIFO and transmitter */
1231 sundance_reset(dev, (NetworkReset|FIFOReset|TxReset) << 16);
1232 /* No need to reset the Tx pointer here */
1233 }
1234 /* Restart the Tx. Need to make sure tx enabled */
1235 i = 10;
1236 do {
1237 iowrite16(ioread16(ioaddr + MACCtrl1) | TxEnable, ioaddr + MACCtrl1);
1238 if (ioread16(ioaddr + MACCtrl1) & TxEnabled)
1239 break;
1240 mdelay(1);
1241 } while (--i);
1242 }
1243 /* Yup, this is a documentation bug. It cost me *hours*. */
1244 iowrite16 (0, ioaddr + TxStatus);
1245 if (tx_cnt < 0) {
1246 iowrite32(5000, ioaddr + DownCounter);
1247 break;
1248 }
1249 tx_status = ioread16 (ioaddr + TxStatus);
1250 }
1251 hw_frame_id = (tx_status >> 8) & 0xff;
1252 } else {
1253 hw_frame_id = ioread8(ioaddr + TxFrameId);
1254 }
1255
1256 if (np->pci_dev->revision >= 0x14) {
1257 spin_lock(&np->lock);
1258 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1259 int entry = np->dirty_tx % TX_RING_SIZE;
1260 struct sk_buff *skb;
1261 int sw_frame_id;
1262 sw_frame_id = (le32_to_cpu(
1263 np->tx_ring[entry].status) >> 2) & 0xff;
1264 if (sw_frame_id == hw_frame_id &&
1265 !(le32_to_cpu(np->tx_ring[entry].status)
1266 & 0x00010000))
1267 break;
1268 if (sw_frame_id == (hw_frame_id + 1) %
1269 TX_RING_SIZE)
1270 break;
1271 skb = np->tx_skbuff[entry];
1272 /* Free the original skb. */
1273 dma_unmap_single(&np->pci_dev->dev,
1274 le32_to_cpu(np->tx_ring[entry].frag.addr),
1275 skb->len, DMA_TO_DEVICE);
1276 dev_consume_skb_irq(np->tx_skbuff[entry]);
1277 np->tx_skbuff[entry] = NULL;
1278 np->tx_ring[entry].frag.addr = 0;
1279 np->tx_ring[entry].frag.length = 0;
1280 }
1281 spin_unlock(&np->lock);
1282 } else {
1283 spin_lock(&np->lock);
1284 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1285 int entry = np->dirty_tx % TX_RING_SIZE;
1286 struct sk_buff *skb;
1287 if (!(le32_to_cpu(np->tx_ring[entry].status)
1288 & 0x00010000))
1289 break;
1290 skb = np->tx_skbuff[entry];
1291 /* Free the original skb. */
1292 dma_unmap_single(&np->pci_dev->dev,
1293 le32_to_cpu(np->tx_ring[entry].frag.addr),
1294 skb->len, DMA_TO_DEVICE);
1295 dev_consume_skb_irq(np->tx_skbuff[entry]);
1296 np->tx_skbuff[entry] = NULL;
1297 np->tx_ring[entry].frag.addr = 0;
1298 np->tx_ring[entry].frag.length = 0;
1299 }
1300 spin_unlock(&np->lock);
1301 }
1302
1303 if (netif_queue_stopped(dev) &&
1304 np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
1305 /* The ring is no longer full, clear busy flag. */
1306 netif_wake_queue (dev);
1307 }
1308 /* Abnormal error summary/uncommon events handlers. */
1309 if (intr_status & (IntrPCIErr | LinkChange | StatsMax))
1310 netdev_error(dev, intr_status);
1311 } while (0);
1312 if (netif_msg_intr(np))
1313 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1314 dev->name, ioread16(ioaddr + IntrStatus));
1315 return IRQ_RETVAL(handled);
1316 }
1317
rx_poll(struct tasklet_struct * t)1318 static void rx_poll(struct tasklet_struct *t)
1319 {
1320 struct netdev_private *np = from_tasklet(np, t, rx_tasklet);
1321 struct net_device *dev = np->ndev;
1322 int entry = np->cur_rx % RX_RING_SIZE;
1323 int boguscnt = np->budget;
1324 void __iomem *ioaddr = np->base;
1325 int received = 0;
1326
1327 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1328 while (1) {
1329 struct netdev_desc *desc = &(np->rx_ring[entry]);
1330 u32 frame_status = le32_to_cpu(desc->status);
1331 int pkt_len;
1332
1333 if (--boguscnt < 0) {
1334 goto not_done;
1335 }
1336 if (!(frame_status & DescOwn))
1337 break;
1338 pkt_len = frame_status & 0x1fff; /* Chip omits the CRC. */
1339 if (netif_msg_rx_status(np))
1340 printk(KERN_DEBUG " netdev_rx() status was %8.8x.\n",
1341 frame_status);
1342 if (frame_status & 0x001f4000) {
1343 /* There was a error. */
1344 if (netif_msg_rx_err(np))
1345 printk(KERN_DEBUG " netdev_rx() Rx error was %8.8x.\n",
1346 frame_status);
1347 dev->stats.rx_errors++;
1348 if (frame_status & 0x00100000)
1349 dev->stats.rx_length_errors++;
1350 if (frame_status & 0x00010000)
1351 dev->stats.rx_fifo_errors++;
1352 if (frame_status & 0x00060000)
1353 dev->stats.rx_frame_errors++;
1354 if (frame_status & 0x00080000)
1355 dev->stats.rx_crc_errors++;
1356 if (frame_status & 0x00100000) {
1357 printk(KERN_WARNING "%s: Oversized Ethernet frame,"
1358 " status %8.8x.\n",
1359 dev->name, frame_status);
1360 }
1361 } else {
1362 struct sk_buff *skb;
1363 #ifndef final_version
1364 if (netif_msg_rx_status(np))
1365 printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
1366 ", bogus_cnt %d.\n",
1367 pkt_len, boguscnt);
1368 #endif
1369 /* Check if the packet is long enough to accept without copying
1370 to a minimally-sized skbuff. */
1371 if (pkt_len < rx_copybreak &&
1372 (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) {
1373 skb_reserve(skb, 2); /* 16 byte align the IP header */
1374 dma_sync_single_for_cpu(&np->pci_dev->dev,
1375 le32_to_cpu(desc->frag.addr),
1376 np->rx_buf_sz, DMA_FROM_DEVICE);
1377 skb_copy_to_linear_data(skb, np->rx_skbuff[entry]->data, pkt_len);
1378 dma_sync_single_for_device(&np->pci_dev->dev,
1379 le32_to_cpu(desc->frag.addr),
1380 np->rx_buf_sz, DMA_FROM_DEVICE);
1381 skb_put(skb, pkt_len);
1382 } else {
1383 dma_unmap_single(&np->pci_dev->dev,
1384 le32_to_cpu(desc->frag.addr),
1385 np->rx_buf_sz, DMA_FROM_DEVICE);
1386 skb_put(skb = np->rx_skbuff[entry], pkt_len);
1387 np->rx_skbuff[entry] = NULL;
1388 }
1389 skb->protocol = eth_type_trans(skb, dev);
1390 /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
1391 netif_rx(skb);
1392 }
1393 entry = (entry + 1) % RX_RING_SIZE;
1394 received++;
1395 }
1396 np->cur_rx = entry;
1397 refill_rx (dev);
1398 np->budget -= received;
1399 iowrite16(DEFAULT_INTR, ioaddr + IntrEnable);
1400 return;
1401
1402 not_done:
1403 np->cur_rx = entry;
1404 refill_rx (dev);
1405 if (!received)
1406 received = 1;
1407 np->budget -= received;
1408 if (np->budget <= 0)
1409 np->budget = RX_BUDGET;
1410 tasklet_schedule(&np->rx_tasklet);
1411 }
1412
refill_rx(struct net_device * dev)1413 static void refill_rx (struct net_device *dev)
1414 {
1415 struct netdev_private *np = netdev_priv(dev);
1416 int entry;
1417
1418 /* Refill the Rx ring buffers. */
1419 for (;(np->cur_rx - np->dirty_rx + RX_RING_SIZE) % RX_RING_SIZE > 0;
1420 np->dirty_rx = (np->dirty_rx + 1) % RX_RING_SIZE) {
1421 struct sk_buff *skb;
1422 entry = np->dirty_rx % RX_RING_SIZE;
1423 if (np->rx_skbuff[entry] == NULL) {
1424 skb = netdev_alloc_skb(dev, np->rx_buf_sz + 2);
1425 np->rx_skbuff[entry] = skb;
1426 if (skb == NULL)
1427 break; /* Better luck next round. */
1428 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1429 np->rx_ring[entry].frag.addr = cpu_to_le32(
1430 dma_map_single(&np->pci_dev->dev, skb->data,
1431 np->rx_buf_sz, DMA_FROM_DEVICE));
1432 if (dma_mapping_error(&np->pci_dev->dev,
1433 np->rx_ring[entry].frag.addr)) {
1434 dev_kfree_skb_irq(skb);
1435 np->rx_skbuff[entry] = NULL;
1436 break;
1437 }
1438 }
1439 /* Perhaps we need not reset this field. */
1440 np->rx_ring[entry].frag.length =
1441 cpu_to_le32(np->rx_buf_sz | LastFrag);
1442 np->rx_ring[entry].status = 0;
1443 }
1444 }
netdev_error(struct net_device * dev,int intr_status)1445 static void netdev_error(struct net_device *dev, int intr_status)
1446 {
1447 struct netdev_private *np = netdev_priv(dev);
1448 void __iomem *ioaddr = np->base;
1449 u16 mii_ctl, mii_advertise, mii_lpa;
1450 int speed;
1451
1452 if (intr_status & LinkChange) {
1453 if (mdio_wait_link(dev, 10) == 0) {
1454 printk(KERN_INFO "%s: Link up\n", dev->name);
1455 if (np->an_enable) {
1456 mii_advertise = mdio_read(dev, np->phys[0],
1457 MII_ADVERTISE);
1458 mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
1459 mii_advertise &= mii_lpa;
1460 printk(KERN_INFO "%s: Link changed: ",
1461 dev->name);
1462 if (mii_advertise & ADVERTISE_100FULL) {
1463 np->speed = 100;
1464 printk("100Mbps, full duplex\n");
1465 } else if (mii_advertise & ADVERTISE_100HALF) {
1466 np->speed = 100;
1467 printk("100Mbps, half duplex\n");
1468 } else if (mii_advertise & ADVERTISE_10FULL) {
1469 np->speed = 10;
1470 printk("10Mbps, full duplex\n");
1471 } else if (mii_advertise & ADVERTISE_10HALF) {
1472 np->speed = 10;
1473 printk("10Mbps, half duplex\n");
1474 } else
1475 printk("\n");
1476
1477 } else {
1478 mii_ctl = mdio_read(dev, np->phys[0], MII_BMCR);
1479 speed = (mii_ctl & BMCR_SPEED100) ? 100 : 10;
1480 np->speed = speed;
1481 printk(KERN_INFO "%s: Link changed: %dMbps ,",
1482 dev->name, speed);
1483 printk("%s duplex.\n",
1484 (mii_ctl & BMCR_FULLDPLX) ?
1485 "full" : "half");
1486 }
1487 check_duplex(dev);
1488 if (np->flowctrl && np->mii_if.full_duplex) {
1489 iowrite16(ioread16(ioaddr + MulticastFilter1+2) | 0x0200,
1490 ioaddr + MulticastFilter1+2);
1491 iowrite16(ioread16(ioaddr + MACCtrl0) | EnbFlowCtrl,
1492 ioaddr + MACCtrl0);
1493 }
1494 netif_carrier_on(dev);
1495 } else {
1496 printk(KERN_INFO "%s: Link down\n", dev->name);
1497 netif_carrier_off(dev);
1498 }
1499 }
1500 if (intr_status & StatsMax) {
1501 get_stats(dev);
1502 }
1503 if (intr_status & IntrPCIErr) {
1504 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
1505 dev->name, intr_status);
1506 /* We must do a global reset of DMA to continue. */
1507 }
1508 }
1509
get_stats(struct net_device * dev)1510 static struct net_device_stats *get_stats(struct net_device *dev)
1511 {
1512 struct netdev_private *np = netdev_priv(dev);
1513 void __iomem *ioaddr = np->base;
1514 unsigned long flags;
1515 u8 late_coll, single_coll, mult_coll;
1516
1517 spin_lock_irqsave(&np->statlock, flags);
1518 /* The chip only need report frame silently dropped. */
1519 dev->stats.rx_missed_errors += ioread8(ioaddr + RxMissed);
1520 dev->stats.tx_packets += ioread16(ioaddr + TxFramesOK);
1521 dev->stats.rx_packets += ioread16(ioaddr + RxFramesOK);
1522 dev->stats.tx_carrier_errors += ioread8(ioaddr + StatsCarrierError);
1523
1524 mult_coll = ioread8(ioaddr + StatsMultiColl);
1525 np->xstats.tx_multiple_collisions += mult_coll;
1526 single_coll = ioread8(ioaddr + StatsOneColl);
1527 np->xstats.tx_single_collisions += single_coll;
1528 late_coll = ioread8(ioaddr + StatsLateColl);
1529 np->xstats.tx_late_collisions += late_coll;
1530 dev->stats.collisions += mult_coll
1531 + single_coll
1532 + late_coll;
1533
1534 np->xstats.tx_deferred += ioread8(ioaddr + StatsTxDefer);
1535 np->xstats.tx_deferred_excessive += ioread8(ioaddr + StatsTxXSDefer);
1536 np->xstats.tx_aborted += ioread8(ioaddr + StatsTxAbort);
1537 np->xstats.tx_bcasts += ioread8(ioaddr + StatsBcastTx);
1538 np->xstats.rx_bcasts += ioread8(ioaddr + StatsBcastRx);
1539 np->xstats.tx_mcasts += ioread8(ioaddr + StatsMcastTx);
1540 np->xstats.rx_mcasts += ioread8(ioaddr + StatsMcastRx);
1541
1542 dev->stats.tx_bytes += ioread16(ioaddr + TxOctetsLow);
1543 dev->stats.tx_bytes += ioread16(ioaddr + TxOctetsHigh) << 16;
1544 dev->stats.rx_bytes += ioread16(ioaddr + RxOctetsLow);
1545 dev->stats.rx_bytes += ioread16(ioaddr + RxOctetsHigh) << 16;
1546
1547 spin_unlock_irqrestore(&np->statlock, flags);
1548
1549 return &dev->stats;
1550 }
1551
set_rx_mode(struct net_device * dev)1552 static void set_rx_mode(struct net_device *dev)
1553 {
1554 struct netdev_private *np = netdev_priv(dev);
1555 void __iomem *ioaddr = np->base;
1556 u16 mc_filter[4]; /* Multicast hash filter */
1557 u32 rx_mode;
1558 int i;
1559
1560 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1561 memset(mc_filter, 0xff, sizeof(mc_filter));
1562 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAll | AcceptMyPhys;
1563 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
1564 (dev->flags & IFF_ALLMULTI)) {
1565 /* Too many to match, or accept all multicasts. */
1566 memset(mc_filter, 0xff, sizeof(mc_filter));
1567 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1568 } else if (!netdev_mc_empty(dev)) {
1569 struct netdev_hw_addr *ha;
1570 int bit;
1571 int index;
1572 int crc;
1573 memset (mc_filter, 0, sizeof (mc_filter));
1574 netdev_for_each_mc_addr(ha, dev) {
1575 crc = ether_crc_le(ETH_ALEN, ha->addr);
1576 for (index=0, bit=0; bit < 6; bit++, crc <<= 1)
1577 if (crc & 0x80000000) index |= 1 << bit;
1578 mc_filter[index/16] |= (1 << (index % 16));
1579 }
1580 rx_mode = AcceptBroadcast | AcceptMultiHash | AcceptMyPhys;
1581 } else {
1582 iowrite8(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode);
1583 return;
1584 }
1585 if (np->mii_if.full_duplex && np->flowctrl)
1586 mc_filter[3] |= 0x0200;
1587
1588 for (i = 0; i < 4; i++)
1589 iowrite16(mc_filter[i], ioaddr + MulticastFilter0 + i*2);
1590 iowrite8(rx_mode, ioaddr + RxMode);
1591 }
1592
__set_mac_addr(struct net_device * dev)1593 static int __set_mac_addr(struct net_device *dev)
1594 {
1595 struct netdev_private *np = netdev_priv(dev);
1596 u16 addr16;
1597
1598 addr16 = (dev->dev_addr[0] | (dev->dev_addr[1] << 8));
1599 iowrite16(addr16, np->base + StationAddr);
1600 addr16 = (dev->dev_addr[2] | (dev->dev_addr[3] << 8));
1601 iowrite16(addr16, np->base + StationAddr+2);
1602 addr16 = (dev->dev_addr[4] | (dev->dev_addr[5] << 8));
1603 iowrite16(addr16, np->base + StationAddr+4);
1604 return 0;
1605 }
1606
1607 /* Invoked with rtnl_lock held */
sundance_set_mac_addr(struct net_device * dev,void * data)1608 static int sundance_set_mac_addr(struct net_device *dev, void *data)
1609 {
1610 const struct sockaddr *addr = data;
1611
1612 if (!is_valid_ether_addr(addr->sa_data))
1613 return -EADDRNOTAVAIL;
1614 eth_hw_addr_set(dev, addr->sa_data);
1615 __set_mac_addr(dev);
1616
1617 return 0;
1618 }
1619
1620 static const struct {
1621 const char name[ETH_GSTRING_LEN];
1622 } sundance_stats[] = {
1623 { "tx_multiple_collisions" },
1624 { "tx_single_collisions" },
1625 { "tx_late_collisions" },
1626 { "tx_deferred" },
1627 { "tx_deferred_excessive" },
1628 { "tx_aborted" },
1629 { "tx_bcasts" },
1630 { "rx_bcasts" },
1631 { "tx_mcasts" },
1632 { "rx_mcasts" },
1633 };
1634
check_if_running(struct net_device * dev)1635 static int check_if_running(struct net_device *dev)
1636 {
1637 if (!netif_running(dev))
1638 return -EINVAL;
1639 return 0;
1640 }
1641
get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1642 static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1643 {
1644 struct netdev_private *np = netdev_priv(dev);
1645 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1646 strscpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info));
1647 }
1648
get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)1649 static int get_link_ksettings(struct net_device *dev,
1650 struct ethtool_link_ksettings *cmd)
1651 {
1652 struct netdev_private *np = netdev_priv(dev);
1653 spin_lock_irq(&np->lock);
1654 mii_ethtool_get_link_ksettings(&np->mii_if, cmd);
1655 spin_unlock_irq(&np->lock);
1656 return 0;
1657 }
1658
set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)1659 static int set_link_ksettings(struct net_device *dev,
1660 const struct ethtool_link_ksettings *cmd)
1661 {
1662 struct netdev_private *np = netdev_priv(dev);
1663 int res;
1664 spin_lock_irq(&np->lock);
1665 res = mii_ethtool_set_link_ksettings(&np->mii_if, cmd);
1666 spin_unlock_irq(&np->lock);
1667 return res;
1668 }
1669
nway_reset(struct net_device * dev)1670 static int nway_reset(struct net_device *dev)
1671 {
1672 struct netdev_private *np = netdev_priv(dev);
1673 return mii_nway_restart(&np->mii_if);
1674 }
1675
get_link(struct net_device * dev)1676 static u32 get_link(struct net_device *dev)
1677 {
1678 struct netdev_private *np = netdev_priv(dev);
1679 return mii_link_ok(&np->mii_if);
1680 }
1681
get_msglevel(struct net_device * dev)1682 static u32 get_msglevel(struct net_device *dev)
1683 {
1684 struct netdev_private *np = netdev_priv(dev);
1685 return np->msg_enable;
1686 }
1687
set_msglevel(struct net_device * dev,u32 val)1688 static void set_msglevel(struct net_device *dev, u32 val)
1689 {
1690 struct netdev_private *np = netdev_priv(dev);
1691 np->msg_enable = val;
1692 }
1693
get_strings(struct net_device * dev,u32 stringset,u8 * data)1694 static void get_strings(struct net_device *dev, u32 stringset,
1695 u8 *data)
1696 {
1697 if (stringset == ETH_SS_STATS)
1698 memcpy(data, sundance_stats, sizeof(sundance_stats));
1699 }
1700
get_sset_count(struct net_device * dev,int sset)1701 static int get_sset_count(struct net_device *dev, int sset)
1702 {
1703 switch (sset) {
1704 case ETH_SS_STATS:
1705 return ARRAY_SIZE(sundance_stats);
1706 default:
1707 return -EOPNOTSUPP;
1708 }
1709 }
1710
get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)1711 static void get_ethtool_stats(struct net_device *dev,
1712 struct ethtool_stats *stats, u64 *data)
1713 {
1714 struct netdev_private *np = netdev_priv(dev);
1715 int i = 0;
1716
1717 get_stats(dev);
1718 data[i++] = np->xstats.tx_multiple_collisions;
1719 data[i++] = np->xstats.tx_single_collisions;
1720 data[i++] = np->xstats.tx_late_collisions;
1721 data[i++] = np->xstats.tx_deferred;
1722 data[i++] = np->xstats.tx_deferred_excessive;
1723 data[i++] = np->xstats.tx_aborted;
1724 data[i++] = np->xstats.tx_bcasts;
1725 data[i++] = np->xstats.rx_bcasts;
1726 data[i++] = np->xstats.tx_mcasts;
1727 data[i++] = np->xstats.rx_mcasts;
1728 }
1729
1730 #ifdef CONFIG_PM
1731
sundance_get_wol(struct net_device * dev,struct ethtool_wolinfo * wol)1732 static void sundance_get_wol(struct net_device *dev,
1733 struct ethtool_wolinfo *wol)
1734 {
1735 struct netdev_private *np = netdev_priv(dev);
1736 void __iomem *ioaddr = np->base;
1737 u8 wol_bits;
1738
1739 wol->wolopts = 0;
1740
1741 wol->supported = (WAKE_PHY | WAKE_MAGIC);
1742 if (!np->wol_enabled)
1743 return;
1744
1745 wol_bits = ioread8(ioaddr + WakeEvent);
1746 if (wol_bits & MagicPktEnable)
1747 wol->wolopts |= WAKE_MAGIC;
1748 if (wol_bits & LinkEventEnable)
1749 wol->wolopts |= WAKE_PHY;
1750 }
1751
sundance_set_wol(struct net_device * dev,struct ethtool_wolinfo * wol)1752 static int sundance_set_wol(struct net_device *dev,
1753 struct ethtool_wolinfo *wol)
1754 {
1755 struct netdev_private *np = netdev_priv(dev);
1756 void __iomem *ioaddr = np->base;
1757 u8 wol_bits;
1758
1759 if (!device_can_wakeup(&np->pci_dev->dev))
1760 return -EOPNOTSUPP;
1761
1762 np->wol_enabled = !!(wol->wolopts);
1763 wol_bits = ioread8(ioaddr + WakeEvent);
1764 wol_bits &= ~(WakePktEnable | MagicPktEnable |
1765 LinkEventEnable | WolEnable);
1766
1767 if (np->wol_enabled) {
1768 if (wol->wolopts & WAKE_MAGIC)
1769 wol_bits |= (MagicPktEnable | WolEnable);
1770 if (wol->wolopts & WAKE_PHY)
1771 wol_bits |= (LinkEventEnable | WolEnable);
1772 }
1773 iowrite8(wol_bits, ioaddr + WakeEvent);
1774
1775 device_set_wakeup_enable(&np->pci_dev->dev, np->wol_enabled);
1776
1777 return 0;
1778 }
1779 #else
1780 #define sundance_get_wol NULL
1781 #define sundance_set_wol NULL
1782 #endif /* CONFIG_PM */
1783
1784 static const struct ethtool_ops ethtool_ops = {
1785 .begin = check_if_running,
1786 .get_drvinfo = get_drvinfo,
1787 .nway_reset = nway_reset,
1788 .get_link = get_link,
1789 .get_wol = sundance_get_wol,
1790 .set_wol = sundance_set_wol,
1791 .get_msglevel = get_msglevel,
1792 .set_msglevel = set_msglevel,
1793 .get_strings = get_strings,
1794 .get_sset_count = get_sset_count,
1795 .get_ethtool_stats = get_ethtool_stats,
1796 .get_link_ksettings = get_link_ksettings,
1797 .set_link_ksettings = set_link_ksettings,
1798 };
1799
netdev_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)1800 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1801 {
1802 struct netdev_private *np = netdev_priv(dev);
1803 int rc;
1804
1805 if (!netif_running(dev))
1806 return -EINVAL;
1807
1808 spin_lock_irq(&np->lock);
1809 rc = generic_mii_ioctl(&np->mii_if, if_mii(rq), cmd, NULL);
1810 spin_unlock_irq(&np->lock);
1811
1812 return rc;
1813 }
1814
netdev_close(struct net_device * dev)1815 static int netdev_close(struct net_device *dev)
1816 {
1817 struct netdev_private *np = netdev_priv(dev);
1818 void __iomem *ioaddr = np->base;
1819 struct sk_buff *skb;
1820 int i;
1821
1822 /* Wait and kill tasklet */
1823 tasklet_kill(&np->rx_tasklet);
1824 tasklet_kill(&np->tx_tasklet);
1825 np->cur_tx = 0;
1826 np->dirty_tx = 0;
1827 np->cur_task = 0;
1828 np->last_tx = NULL;
1829
1830 netif_stop_queue(dev);
1831
1832 if (netif_msg_ifdown(np)) {
1833 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %2.2x "
1834 "Rx %4.4x Int %2.2x.\n",
1835 dev->name, ioread8(ioaddr + TxStatus),
1836 ioread32(ioaddr + RxStatus), ioread16(ioaddr + IntrStatus));
1837 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1838 dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
1839 }
1840
1841 /* Disable interrupts by clearing the interrupt mask. */
1842 iowrite16(0x0000, ioaddr + IntrEnable);
1843
1844 /* Disable Rx and Tx DMA for safely release resource */
1845 iowrite32(0x500, ioaddr + DMACtrl);
1846
1847 /* Stop the chip's Tx and Rx processes. */
1848 iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
1849
1850 for (i = 2000; i > 0; i--) {
1851 if ((ioread32(ioaddr + DMACtrl) & 0xc000) == 0)
1852 break;
1853 mdelay(1);
1854 }
1855
1856 iowrite16(GlobalReset | DMAReset | FIFOReset | NetworkReset,
1857 ioaddr + ASIC_HI_WORD(ASICCtrl));
1858
1859 for (i = 2000; i > 0; i--) {
1860 if ((ioread16(ioaddr + ASIC_HI_WORD(ASICCtrl)) & ResetBusy) == 0)
1861 break;
1862 mdelay(1);
1863 }
1864
1865 #ifdef __i386__
1866 if (netif_msg_hw(np)) {
1867 printk(KERN_DEBUG " Tx ring at %8.8x:\n",
1868 (int)(np->tx_ring_dma));
1869 for (i = 0; i < TX_RING_SIZE; i++)
1870 printk(KERN_DEBUG " #%d desc. %4.4x %8.8x %8.8x.\n",
1871 i, np->tx_ring[i].status, np->tx_ring[i].frag.addr,
1872 np->tx_ring[i].frag.length);
1873 printk(KERN_DEBUG " Rx ring %8.8x:\n",
1874 (int)(np->rx_ring_dma));
1875 for (i = 0; i < /*RX_RING_SIZE*/4 ; i++) {
1876 printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
1877 i, np->rx_ring[i].status, np->rx_ring[i].frag.addr,
1878 np->rx_ring[i].frag.length);
1879 }
1880 }
1881 #endif /* __i386__ debugging only */
1882
1883 free_irq(np->pci_dev->irq, dev);
1884
1885 del_timer_sync(&np->timer);
1886
1887 /* Free all the skbuffs in the Rx queue. */
1888 for (i = 0; i < RX_RING_SIZE; i++) {
1889 np->rx_ring[i].status = 0;
1890 skb = np->rx_skbuff[i];
1891 if (skb) {
1892 dma_unmap_single(&np->pci_dev->dev,
1893 le32_to_cpu(np->rx_ring[i].frag.addr),
1894 np->rx_buf_sz, DMA_FROM_DEVICE);
1895 dev_kfree_skb(skb);
1896 np->rx_skbuff[i] = NULL;
1897 }
1898 np->rx_ring[i].frag.addr = cpu_to_le32(0xBADF00D0); /* poison */
1899 }
1900 for (i = 0; i < TX_RING_SIZE; i++) {
1901 np->tx_ring[i].next_desc = 0;
1902 skb = np->tx_skbuff[i];
1903 if (skb) {
1904 dma_unmap_single(&np->pci_dev->dev,
1905 le32_to_cpu(np->tx_ring[i].frag.addr),
1906 skb->len, DMA_TO_DEVICE);
1907 dev_kfree_skb(skb);
1908 np->tx_skbuff[i] = NULL;
1909 }
1910 }
1911
1912 return 0;
1913 }
1914
sundance_remove1(struct pci_dev * pdev)1915 static void sundance_remove1(struct pci_dev *pdev)
1916 {
1917 struct net_device *dev = pci_get_drvdata(pdev);
1918
1919 if (dev) {
1920 struct netdev_private *np = netdev_priv(dev);
1921 unregister_netdev(dev);
1922 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE,
1923 np->rx_ring, np->rx_ring_dma);
1924 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE,
1925 np->tx_ring, np->tx_ring_dma);
1926 pci_iounmap(pdev, np->base);
1927 pci_release_regions(pdev);
1928 free_netdev(dev);
1929 }
1930 }
1931
sundance_suspend(struct device * dev_d)1932 static int __maybe_unused sundance_suspend(struct device *dev_d)
1933 {
1934 struct net_device *dev = dev_get_drvdata(dev_d);
1935 struct netdev_private *np = netdev_priv(dev);
1936 void __iomem *ioaddr = np->base;
1937
1938 if (!netif_running(dev))
1939 return 0;
1940
1941 netdev_close(dev);
1942 netif_device_detach(dev);
1943
1944 if (np->wol_enabled) {
1945 iowrite8(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode);
1946 iowrite16(RxEnable, ioaddr + MACCtrl1);
1947 }
1948
1949 device_set_wakeup_enable(dev_d, np->wol_enabled);
1950
1951 return 0;
1952 }
1953
sundance_resume(struct device * dev_d)1954 static int __maybe_unused sundance_resume(struct device *dev_d)
1955 {
1956 struct net_device *dev = dev_get_drvdata(dev_d);
1957 int err = 0;
1958
1959 if (!netif_running(dev))
1960 return 0;
1961
1962 err = netdev_open(dev);
1963 if (err) {
1964 printk(KERN_ERR "%s: Can't resume interface!\n",
1965 dev->name);
1966 goto out;
1967 }
1968
1969 netif_device_attach(dev);
1970
1971 out:
1972 return err;
1973 }
1974
1975 static SIMPLE_DEV_PM_OPS(sundance_pm_ops, sundance_suspend, sundance_resume);
1976
1977 static struct pci_driver sundance_driver = {
1978 .name = DRV_NAME,
1979 .id_table = sundance_pci_tbl,
1980 .probe = sundance_probe1,
1981 .remove = sundance_remove1,
1982 .driver.pm = &sundance_pm_ops,
1983 };
1984
1985 module_pci_driver(sundance_driver);
1986