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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* lance.c: An AMD LANCE/PCnet ethernet driver for Linux. */
2/*
3 Written/copyright 1993-1998 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7 This software may be used and distributed according to the terms
8 of the GNU General Public License, incorporated herein by reference.
9
10 This driver is for the Allied Telesis AT1500 and HP J2405A, and should work
11 with most other LANCE-based bus-master (NE2100/NE2500) ethercards.
12
13 The author may be reached as becker@scyld.com, or C/O
14 Scyld Computing Corporation
15 410 Severn Ave., Suite 210
16 Annapolis MD 21403
17
18 Andrey V. Savochkin:
19 - alignment problem with 1.3.* kernel and some minor changes.
20 Thomas Bogendoerfer (tsbogend@bigbug.franken.de):
21 - added support for Linux/Alpha, but removed most of it, because
Jeff Garzik6aa20a22006-09-13 13:24:59 -040022 it worked only for the PCI chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 - added hook for the 32bit lance driver
24 - added PCnetPCI II (79C970A) to chip table
25 Paul Gortmaker (gpg109@rsphy1.anu.edu.au):
26 - hopefully fix above so Linux/Alpha can use ISA cards too.
27 8/20/96 Fixed 7990 autoIRQ failure and reversed unneeded alignment -djb
28 v1.12 10/27/97 Module support -djb
29 v1.14 2/3/98 Module support modified, made PCI support optional -djb
30 v1.15 5/27/99 Fixed bug in the cleanup_module(). dev->priv was freed
31 before unregister_netdev() which caused NULL pointer
32 reference later in the chain (in rtnetlink_fill_ifinfo())
33 -- Mika Kuoppala <miku@iki.fi>
Jeff Garzik6aa20a22006-09-13 13:24:59 -040034
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 Forward ported v1.14 to 2.1.129, merged the PCI and misc changes from
36 the 2.1 version of the old driver - Alan Cox
37
38 Get rid of check_region, check kmalloc return in lance_probe1
39 Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
40
41 Reworked detection, added support for Racal InterLan EtherBlaster cards
42 Vesselin Kostadinov <vesok at yahoo dot com > - 22/4/2004
43*/
44
Andy Gospodarekd5b20692006-09-11 17:39:18 -040045static const char version[] = "lance.c:v1.16 2006/11/09 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47#include <linux/module.h>
48#include <linux/kernel.h>
49#include <linux/string.h>
50#include <linux/delay.h>
51#include <linux/errno.h>
52#include <linux/ioport.h>
53#include <linux/slab.h>
54#include <linux/interrupt.h>
55#include <linux/pci.h>
56#include <linux/init.h>
57#include <linux/netdevice.h>
58#include <linux/etherdevice.h>
59#include <linux/skbuff.h>
Al Virod7fe0f22006-12-03 23:15:30 -050060#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/bitops.h>
62
63#include <asm/io.h>
64#include <asm/dma.h>
65
66static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0};
67static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options);
68static int __init do_lance_probe(struct net_device *dev);
69
70
71static struct card {
72 char id_offset14;
73 char id_offset15;
74} cards[] = {
75 { //"normal"
76 .id_offset14 = 0x57,
77 .id_offset15 = 0x57,
78 },
79 { //NI6510EB
80 .id_offset14 = 0x52,
81 .id_offset15 = 0x44,
82 },
83 { //Racal InterLan EtherBlaster
84 .id_offset14 = 0x52,
85 .id_offset15 = 0x49,
86 },
87};
88#define NUM_CARDS 3
89
90#ifdef LANCE_DEBUG
91static int lance_debug = LANCE_DEBUG;
92#else
93static int lance_debug = 1;
94#endif
95
96/*
97 Theory of Operation
98
99I. Board Compatibility
100
101This device driver is designed for the AMD 79C960, the "PCnet-ISA
102single-chip ethernet controller for ISA". This chip is used in a wide
103variety of boards from vendors such as Allied Telesis, HP, Kingston,
104and Boca. This driver is also intended to work with older AMD 7990
105designs, such as the NE1500 and NE2100, and newer 79C961. For convenience,
106I use the name LANCE to refer to all of the AMD chips, even though it properly
107refers only to the original 7990.
108
109II. Board-specific settings
110
111The driver is designed to work the boards that use the faster
112bus-master mode, rather than in shared memory mode. (Only older designs
113have on-board buffer memory needed to support the slower shared memory mode.)
114
115Most ISA boards have jumpered settings for the I/O base, IRQ line, and DMA
116channel. This driver probes the likely base addresses:
117{0x300, 0x320, 0x340, 0x360}.
118After the board is found it generates a DMA-timeout interrupt and uses
119autoIRQ to find the IRQ line. The DMA channel can be set with the low bits
120of the otherwise-unused dev->mem_start value (aka PARAM1). If unset it is
121probed for by enabling each free DMA channel in turn and checking if
122initialization succeeds.
123
124The HP-J2405A board is an exception: with this board it is easy to read the
125EEPROM-set values for the base, IRQ, and DMA. (Of course you must already
126_know_ the base address -- that field is for writing the EEPROM.)
127
128III. Driver operation
129
130IIIa. Ring buffers
131The LANCE uses ring buffers of Tx and Rx descriptors. Each entry describes
132the base and length of the data buffer, along with status bits. The length
133of these buffers is set by LANCE_LOG_{RX,TX}_BUFFERS, which is log_2() of
134the buffer length (rather than being directly the buffer length) for
135implementation ease. The current values are 2 (Tx) and 4 (Rx), which leads to
136ring sizes of 4 (Tx) and 16 (Rx). Increasing the number of ring entries
137needlessly uses extra space and reduces the chance that an upper layer will
138be able to reorder queued Tx packets based on priority. Decreasing the number
139of entries makes it more difficult to achieve back-to-back packet transmission
140and increases the chance that Rx ring will overflow. (Consider the worst case
141of receiving back-to-back minimum-sized packets.)
142
143The LANCE has the capability to "chain" both Rx and Tx buffers, but this driver
144statically allocates full-sized (slightly oversized -- PKT_BUF_SZ) buffers to
145avoid the administrative overhead. For the Rx side this avoids dynamically
146allocating full-sized buffers "just in case", at the expense of a
147memory-to-memory data copy for each packet received. For most systems this
148is a good tradeoff: the Rx buffer will always be in low memory, the copy
149is inexpensive, and it primes the cache for later packet processing. For Tx
150the buffers are only used when needed as low-memory bounce buffers.
151
152IIIB. 16M memory limitations.
153For the ISA bus master mode all structures used directly by the LANCE,
154the initialization block, Rx and Tx rings, and data buffers, must be
155accessible from the ISA bus, i.e. in the lower 16M of real memory.
156This is a problem for current Linux kernels on >16M machines. The network
157devices are initialized after memory initialization, and the kernel doles out
158memory from the top of memory downward. The current solution is to have a
159special network initialization routine that's called before memory
160initialization; this will eventually be generalized for all network devices.
161As mentioned before, low-memory "bounce-buffers" are used when needed.
162
163IIIC. Synchronization
164The driver runs as two independent, single-threaded flows of control. One
165is the send-packet routine, which enforces single-threaded use by the
166dev->tbusy flag. The other thread is the interrupt handler, which is single
167threaded by the hardware and other software.
168
169The send packet thread has partial control over the Tx ring and 'dev->tbusy'
170flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
171queue slot is empty, it clears the tbusy flag when finished otherwise it sets
172the 'lp->tx_full' flag.
173
174The interrupt handler has exclusive control over the Rx ring and records stats
175from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so
176we can't avoid the interrupt overhead by having the Tx routine reap the Tx
177stats.) After reaping the stats, it marks the queue entry as empty by setting
178the 'base' to zero. Iff the 'lp->tx_full' flag is set, it clears both the
179tx_full and tbusy flags.
180
181*/
182
183/* Set the number of Tx and Rx buffers, using Log_2(# buffers).
184 Reasonable default values are 16 Tx buffers, and 16 Rx buffers.
185 That translates to 4 and 4 (16 == 2^^4).
186 This is a compile-time option for efficiency.
187 */
188#ifndef LANCE_LOG_TX_BUFFERS
189#define LANCE_LOG_TX_BUFFERS 4
190#define LANCE_LOG_RX_BUFFERS 4
191#endif
192
193#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
194#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
195#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
196
197#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
198#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
199#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
200
201#define PKT_BUF_SZ 1544
202
203/* Offsets from base I/O address. */
204#define LANCE_DATA 0x10
205#define LANCE_ADDR 0x12
206#define LANCE_RESET 0x14
207#define LANCE_BUS_IF 0x16
208#define LANCE_TOTAL_SIZE 0x18
209
210#define TX_TIMEOUT 20
211
212/* The LANCE Rx and Tx ring descriptors. */
213struct lance_rx_head {
214 s32 base;
215 s16 buf_length; /* This length is 2s complement (negative)! */
216 s16 msg_length; /* This length is "normal". */
217};
218
219struct lance_tx_head {
220 s32 base;
221 s16 length; /* Length is 2s complement (negative)! */
222 s16 misc;
223};
224
225/* The LANCE initialization block, described in databook. */
226struct lance_init_block {
227 u16 mode; /* Pre-set mode (reg. 15) */
228 u8 phys_addr[6]; /* Physical ethernet address */
229 u32 filter[2]; /* Multicast filter (unused). */
230 /* Receive and transmit ring base, along with extra bits. */
231 u32 rx_ring; /* Tx and Rx ring base pointers */
232 u32 tx_ring;
233};
234
235struct lance_private {
236 /* The Tx and Rx ring entries must be aligned on 8-byte boundaries. */
237 struct lance_rx_head rx_ring[RX_RING_SIZE];
238 struct lance_tx_head tx_ring[TX_RING_SIZE];
239 struct lance_init_block init_block;
240 const char *name;
241 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
242 struct sk_buff* tx_skbuff[TX_RING_SIZE];
243 /* The addresses of receive-in-place skbuffs. */
244 struct sk_buff* rx_skbuff[RX_RING_SIZE];
245 unsigned long rx_buffs; /* Address of Rx and Tx buffers. */
246 /* Tx low-memory "bounce buffer" address. */
247 char (*tx_bounce_buffs)[PKT_BUF_SZ];
248 int cur_rx, cur_tx; /* The next free ring entry */
249 int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
250 int dma;
251 struct net_device_stats stats;
252 unsigned char chip_version; /* See lance_chip_type. */
253 spinlock_t devlock;
254};
255
256#define LANCE_MUST_PAD 0x00000001
257#define LANCE_ENABLE_AUTOSELECT 0x00000002
258#define LANCE_MUST_REINIT_RING 0x00000004
259#define LANCE_MUST_UNRESET 0x00000008
260#define LANCE_HAS_MISSED_FRAME 0x00000010
261
262/* A mapping from the chip ID number to the part number and features.
263 These are from the datasheets -- in real life the '970 version
264 reportedly has the same ID as the '965. */
265static struct lance_chip_type {
266 int id_number;
267 const char *name;
268 int flags;
269} chip_table[] = {
270 {0x0000, "LANCE 7990", /* Ancient lance chip. */
271 LANCE_MUST_PAD + LANCE_MUST_UNRESET},
272 {0x0003, "PCnet/ISA 79C960", /* 79C960 PCnet/ISA. */
273 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
274 LANCE_HAS_MISSED_FRAME},
275 {0x2260, "PCnet/ISA+ 79C961", /* 79C961 PCnet/ISA+, Plug-n-Play. */
276 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
277 LANCE_HAS_MISSED_FRAME},
278 {0x2420, "PCnet/PCI 79C970", /* 79C970 or 79C974 PCnet-SCSI, PCI. */
279 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
280 LANCE_HAS_MISSED_FRAME},
281 /* Bug: the PCnet/PCI actually uses the PCnet/VLB ID number, so just call
282 it the PCnet32. */
283 {0x2430, "PCnet32", /* 79C965 PCnet for VL bus. */
284 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
285 LANCE_HAS_MISSED_FRAME},
286 {0x2621, "PCnet/PCI-II 79C970A", /* 79C970A PCInetPCI II. */
287 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
288 LANCE_HAS_MISSED_FRAME},
289 {0x0, "PCnet (unknown)",
290 LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
291 LANCE_HAS_MISSED_FRAME},
292};
293
294enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6};
295
296
297/* Non-zero if lance_probe1() needs to allocate low-memory bounce buffers.
298 Assume yes until we know the memory size. */
299static unsigned char lance_need_isa_bounce_buffers = 1;
300
301static int lance_open(struct net_device *dev);
Al Viro9e249742005-10-21 03:22:29 -0400302static void lance_init_ring(struct net_device *dev, gfp_t mode);
Stephen Hemminger613573252009-08-31 19:50:58 +0000303static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
304 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305static int lance_rx(struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100306static irqreturn_t lance_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307static int lance_close(struct net_device *dev);
308static struct net_device_stats *lance_get_stats(struct net_device *dev);
309static void set_multicast_list(struct net_device *dev);
310static void lance_tx_timeout (struct net_device *dev);
311
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314#ifdef MODULE
315#define MAX_CARDS 8 /* Max number of interfaces (cards) per module */
316
317static struct net_device *dev_lance[MAX_CARDS];
318static int io[MAX_CARDS];
319static int dma[MAX_CARDS];
320static int irq[MAX_CARDS];
321
322module_param_array(io, int, NULL, 0);
323module_param_array(dma, int, NULL, 0);
324module_param_array(irq, int, NULL, 0);
325module_param(lance_debug, int, 0);
326MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
327MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
328MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
329MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
330
Andrew Morton3805f0e2006-08-14 23:00:03 -0700331int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
333 struct net_device *dev;
334 int this_dev, found = 0;
335
336 for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
337 if (io[this_dev] == 0) {
338 if (this_dev != 0) /* only complain once */
339 break;
340 printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
341 return -EPERM;
342 }
343 dev = alloc_etherdev(0);
344 if (!dev)
345 break;
346 dev->irq = irq[this_dev];
347 dev->base_addr = io[this_dev];
348 dev->dma = dma[this_dev];
349 if (do_lance_probe(dev) == 0) {
b1fc5502005-05-12 20:11:55 -0400350 dev_lance[found++] = dev;
351 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 }
353 free_netdev(dev);
354 break;
355 }
356 if (found != 0)
357 return 0;
358 return -ENXIO;
359}
360
Denis Vlasenko64916f12006-01-05 22:45:47 -0800361static void cleanup_card(struct net_device *dev)
362{
Wang Chenc0103602008-11-20 04:05:56 -0800363 struct lance_private *lp = dev->ml_priv;
Denis Vlasenko64916f12006-01-05 22:45:47 -0800364 if (dev->dma != 4)
365 free_dma(dev->dma);
366 release_region(dev->base_addr, LANCE_TOTAL_SIZE);
367 kfree(lp->tx_bounce_buffs);
368 kfree((void*)lp->rx_buffs);
369 kfree(lp);
370}
371
Al Viroafc8eb42006-06-14 18:50:53 -0400372void __exit cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
374 int this_dev;
375
376 for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
377 struct net_device *dev = dev_lance[this_dev];
378 if (dev) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400379 unregister_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 cleanup_card(dev);
381 free_netdev(dev);
382 }
383 }
384}
385#endif /* MODULE */
386MODULE_LICENSE("GPL");
387
388
389/* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other
390 board probes now that kmalloc() can allocate ISA DMA-able regions.
391 This also allows the LANCE driver to be used as a module.
392 */
393static int __init do_lance_probe(struct net_device *dev)
394{
Hannes Eder00137da2009-02-14 11:13:24 +0000395 unsigned int *port;
396 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398 if (high_memory <= phys_to_virt(16*1024*1024))
399 lance_need_isa_bounce_buffers = 0;
400
401 for (port = lance_portlist; *port; port++) {
402 int ioaddr = *port;
403 struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
404 "lance-probe");
405
406 if (r) {
407 /* Detect the card with minimal I/O reads */
408 char offset14 = inb(ioaddr + 14);
409 int card;
410 for (card = 0; card < NUM_CARDS; ++card)
411 if (cards[card].id_offset14 == offset14)
412 break;
413 if (card < NUM_CARDS) {/*yes, the first byte matches*/
414 char offset15 = inb(ioaddr + 15);
415 for (card = 0; card < NUM_CARDS; ++card)
416 if ((cards[card].id_offset14 == offset14) &&
417 (cards[card].id_offset15 == offset15))
418 break;
419 }
420 if (card < NUM_CARDS) { /*Signature OK*/
421 result = lance_probe1(dev, ioaddr, 0, 0);
422 if (!result) {
Wang Chenc0103602008-11-20 04:05:56 -0800423 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 int ver = lp->chip_version;
425
426 r->name = chip_table[ver].name;
427 return 0;
428 }
429 }
430 release_region(ioaddr, LANCE_TOTAL_SIZE);
431 }
432 }
433 return -ENODEV;
434}
435
436#ifndef MODULE
437struct net_device * __init lance_probe(int unit)
438{
439 struct net_device *dev = alloc_etherdev(0);
440 int err;
441
442 if (!dev)
443 return ERR_PTR(-ENODEV);
444
445 sprintf(dev->name, "eth%d", unit);
446 netdev_boot_setup_check(dev);
447
448 err = do_lance_probe(dev);
449 if (err)
450 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452out:
453 free_netdev(dev);
454 return ERR_PTR(err);
455}
456#endif
457
Stephen Hemminger462540b2009-03-26 15:11:32 +0000458static const struct net_device_ops lance_netdev_ops = {
459 .ndo_open = lance_open,
460 .ndo_start_xmit = lance_start_xmit,
461 .ndo_stop = lance_close,
462 .ndo_get_stats = lance_get_stats,
463 .ndo_set_multicast_list = set_multicast_list,
464 .ndo_tx_timeout = lance_tx_timeout,
465 .ndo_change_mtu = eth_change_mtu,
466 .ndo_set_mac_address = eth_mac_addr,
467 .ndo_validate_addr = eth_validate_addr,
468};
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
471{
472 struct lance_private *lp;
Hannes Eder00137da2009-02-14 11:13:24 +0000473 unsigned long dma_channels; /* Mark spuriously-busy DMA channels */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 int i, reset_val, lance_version;
475 const char *chipname;
476 /* Flags for specific chips or boards. */
Hannes Eder00137da2009-02-14 11:13:24 +0000477 unsigned char hpJ2405A = 0; /* HP ISA adaptor */
478 int hp_builtin = 0; /* HP on-board ethernet. */
479 static int did_version; /* Already printed version info. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 unsigned long flags;
481 int err = -ENOMEM;
Al Viroc44fec12006-03-24 03:15:41 -0800482 void __iomem *bios;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
484 /* First we look for special cases.
485 Check for HP's on-board ethernet by looking for 'HP' in the BIOS.
486 There are two HP versions, check the BIOS for the configuration port.
487 This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com.
488 */
Al Viroc44fec12006-03-24 03:15:41 -0800489 bios = ioremap(0xf00f0, 0x14);
490 if (!bios)
491 return -ENOMEM;
492 if (readw(bios + 0x12) == 0x5048) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
Al Viroc44fec12006-03-24 03:15:41 -0800494 int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 /* We can have boards other than the built-in! Verify this is on-board. */
Joe Perches8e95a202009-12-03 07:58:21 +0000496 if ((inb(hp_port) & 0xc0) == 0x80 &&
497 ioaddr_table[inb(hp_port) & 3] == ioaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 hp_builtin = hp_port;
499 }
Al Viroc44fec12006-03-24 03:15:41 -0800500 iounmap(bios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 /* We also recognize the HP Vectra on-board here, but check below. */
Joe Perches8e95a202009-12-03 07:58:21 +0000502 hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00 &&
503 inb(ioaddr+2) == 0x09);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505 /* Reset the LANCE. */
506 reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */
507
508 /* The Un-Reset needed is only needed for the real NE2100, and will
509 confuse the HP board. */
510 if (!hpJ2405A)
511 outw(reset_val, ioaddr+LANCE_RESET);
512
513 outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */
514 if (inw(ioaddr+LANCE_DATA) != 0x0004)
515 return -ENODEV;
516
517 /* Get the version of the chip. */
518 outw(88, ioaddr+LANCE_ADDR);
519 if (inw(ioaddr+LANCE_ADDR) != 88) {
520 lance_version = 0;
521 } else { /* Good, it's a newer chip. */
522 int chip_version = inw(ioaddr+LANCE_DATA);
523 outw(89, ioaddr+LANCE_ADDR);
524 chip_version |= inw(ioaddr+LANCE_DATA) << 16;
525 if (lance_debug > 2)
526 printk(" LANCE chip version is %#x.\n", chip_version);
527 if ((chip_version & 0xfff) != 0x003)
528 return -ENODEV;
529 chip_version = (chip_version >> 12) & 0xffff;
530 for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
531 if (chip_table[lance_version].id_number == chip_version)
532 break;
533 }
534 }
535
Wang Chenb74ca3a2008-12-08 01:14:16 -0800536 /* We can't allocate private data from alloc_etherdev() because it must
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 a ISA DMA-able region. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 chipname = chip_table[lance_version].name;
Joe Perches0795af52007-10-03 17:59:30 -0700539 printk("%s: %s at %#3x, ", dev->name, chipname, ioaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 /* There is a 16 byte station address PROM at the base address.
542 The first six bytes are the station address. */
543 for (i = 0; i < 6; i++)
Joe Perches0795af52007-10-03 17:59:30 -0700544 dev->dev_addr[i] = inb(ioaddr + i);
Johannes Berge1749612008-10-27 15:59:26 -0700545 printk("%pM", dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 dev->base_addr = ioaddr;
548 /* Make certain the data structures used by the LANCE are aligned and DMAble. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400549
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700550 lp = kzalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 if(lp==NULL)
552 return -ENODEV;
553 if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
Wang Chenc0103602008-11-20 04:05:56 -0800554 dev->ml_priv = lp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 lp->name = chipname;
556 lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE,
557 GFP_DMA | GFP_KERNEL);
558 if (!lp->rx_buffs)
559 goto out_lp;
560 if (lance_need_isa_bounce_buffers) {
561 lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE,
562 GFP_DMA | GFP_KERNEL);
563 if (!lp->tx_bounce_buffs)
564 goto out_rx;
565 } else
566 lp->tx_bounce_buffs = NULL;
567
568 lp->chip_version = lance_version;
569 spin_lock_init(&lp->devlock);
570
571 lp->init_block.mode = 0x0003; /* Disable Rx and Tx. */
572 for (i = 0; i < 6; i++)
573 lp->init_block.phys_addr[i] = dev->dev_addr[i];
574 lp->init_block.filter[0] = 0x00000000;
575 lp->init_block.filter[1] = 0x00000000;
576 lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
577 lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
578
579 outw(0x0001, ioaddr+LANCE_ADDR);
580 inw(ioaddr+LANCE_ADDR);
581 outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
582 outw(0x0002, ioaddr+LANCE_ADDR);
583 inw(ioaddr+LANCE_ADDR);
584 outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
585 outw(0x0000, ioaddr+LANCE_ADDR);
586 inw(ioaddr+LANCE_ADDR);
587
588 if (irq) { /* Set iff PCI card. */
589 dev->dma = 4; /* Native bus-master, no DMA channel needed. */
590 dev->irq = irq;
591 } else if (hp_builtin) {
592 static const char dma_tbl[4] = {3, 5, 6, 0};
593 static const char irq_tbl[4] = {3, 4, 5, 9};
594 unsigned char port_val = inb(hp_builtin);
595 dev->dma = dma_tbl[(port_val >> 4) & 3];
596 dev->irq = irq_tbl[(port_val >> 2) & 3];
597 printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
598 } else if (hpJ2405A) {
599 static const char dma_tbl[4] = {3, 5, 6, 7};
600 static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
601 short reset_val = inw(ioaddr+LANCE_RESET);
602 dev->dma = dma_tbl[(reset_val >> 2) & 3];
603 dev->irq = irq_tbl[(reset_val >> 4) & 7];
604 printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
605 } else if (lance_version == PCNET_ISAP) { /* The plug-n-play version. */
606 short bus_info;
607 outw(8, ioaddr+LANCE_ADDR);
608 bus_info = inw(ioaddr+LANCE_BUS_IF);
609 dev->dma = bus_info & 0x07;
610 dev->irq = (bus_info >> 4) & 0x0F;
611 } else {
612 /* The DMA channel may be passed in PARAM1. */
613 if (dev->mem_start & 0x07)
614 dev->dma = dev->mem_start & 0x07;
615 }
616
617 if (dev->dma == 0) {
618 /* Read the DMA channel status register, so that we can avoid
619 stuck DMA channels in the DMA detection below. */
620 dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
621 (inb(DMA2_STAT_REG) & 0xf0);
622 }
623 err = -ENODEV;
624 if (dev->irq >= 2)
625 printk(" assigned IRQ %d", dev->irq);
626 else if (lance_version != 0) { /* 7990 boards need DMA detection first. */
627 unsigned long irq_mask;
628
629 /* To auto-IRQ we enable the initialization-done and DMA error
630 interrupts. For ISA boards we get a DMA error, but VLB and PCI
631 boards will work. */
632 irq_mask = probe_irq_on();
633
634 /* Trigger an initialization just for the interrupt. */
635 outw(0x0041, ioaddr+LANCE_DATA);
636
637 mdelay(20);
638 dev->irq = probe_irq_off(irq_mask);
639 if (dev->irq)
640 printk(", probed IRQ %d", dev->irq);
641 else {
642 printk(", failed to detect IRQ line.\n");
643 goto out_tx;
644 }
645
646 /* Check for the initialization done bit, 0x0100, which means
647 that we don't need a DMA channel. */
648 if (inw(ioaddr+LANCE_DATA) & 0x0100)
649 dev->dma = 4;
650 }
651
652 if (dev->dma == 4) {
653 printk(", no DMA needed.\n");
654 } else if (dev->dma) {
655 if (request_dma(dev->dma, chipname)) {
656 printk("DMA %d allocation failed.\n", dev->dma);
657 goto out_tx;
658 } else
659 printk(", assigned DMA %d.\n", dev->dma);
660 } else { /* OK, we have to auto-DMA. */
661 for (i = 0; i < 4; i++) {
662 static const char dmas[] = { 5, 6, 7, 3 };
663 int dma = dmas[i];
664 int boguscnt;
665
666 /* Don't enable a permanently busy DMA channel, or the machine
667 will hang. */
668 if (test_bit(dma, &dma_channels))
669 continue;
670 outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */
671 if (request_dma(dma, chipname))
672 continue;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400673
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 flags=claim_dma_lock();
675 set_dma_mode(dma, DMA_MODE_CASCADE);
676 enable_dma(dma);
677 release_dma_lock(flags);
678
679 /* Trigger an initialization. */
680 outw(0x0001, ioaddr+LANCE_DATA);
681 for (boguscnt = 100; boguscnt > 0; --boguscnt)
682 if (inw(ioaddr+LANCE_DATA) & 0x0900)
683 break;
684 if (inw(ioaddr+LANCE_DATA) & 0x0100) {
685 dev->dma = dma;
686 printk(", DMA %d.\n", dev->dma);
687 break;
688 } else {
689 flags=claim_dma_lock();
690 disable_dma(dma);
691 release_dma_lock(flags);
692 free_dma(dma);
693 }
694 }
695 if (i == 4) { /* Failure: bail. */
696 printk("DMA detection failed.\n");
697 goto out_tx;
698 }
699 }
700
701 if (lance_version == 0 && dev->irq == 0) {
702 /* We may auto-IRQ now that we have a DMA channel. */
703 /* Trigger an initialization just for the interrupt. */
704 unsigned long irq_mask;
705
706 irq_mask = probe_irq_on();
707 outw(0x0041, ioaddr+LANCE_DATA);
708
709 mdelay(40);
710 dev->irq = probe_irq_off(irq_mask);
711 if (dev->irq == 0) {
712 printk(" Failed to detect the 7990 IRQ line.\n");
713 goto out_dma;
714 }
715 printk(" Auto-IRQ detected IRQ%d.\n", dev->irq);
716 }
717
718 if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
719 /* Turn on auto-select of media (10baseT or BNC) so that the user
720 can watch the LEDs even if the board isn't opened. */
721 outw(0x0002, ioaddr+LANCE_ADDR);
722 /* Don't touch 10base2 power bit. */
723 outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
724 }
725
726 if (lance_debug > 0 && did_version++ == 0)
727 printk(version);
728
729 /* The LANCE-specific entries in the device structure. */
Stephen Hemminger462540b2009-03-26 15:11:32 +0000730 dev->netdev_ops = &lance_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 dev->watchdog_timeo = TX_TIMEOUT;
732
b1fc5502005-05-12 20:11:55 -0400733 err = register_netdev(dev);
734 if (err)
735 goto out_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 return 0;
737out_dma:
738 if (dev->dma != 4)
739 free_dma(dev->dma);
740out_tx:
741 kfree(lp->tx_bounce_buffs);
742out_rx:
743 kfree((void*)lp->rx_buffs);
744out_lp:
745 kfree(lp);
746 return err;
747}
748
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750static int
751lance_open(struct net_device *dev)
752{
Wang Chenc0103602008-11-20 04:05:56 -0800753 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 int ioaddr = dev->base_addr;
755 int i;
756
757 if (dev->irq == 0 ||
Joe Perchesa0607fd2009-11-18 23:29:17 -0800758 request_irq(dev->irq, lance_interrupt, 0, lp->name, dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 return -EAGAIN;
760 }
761
762 /* We used to allocate DMA here, but that was silly.
763 DMA lines can't be shared! We now permanently allocate them. */
764
765 /* Reset the LANCE */
766 inw(ioaddr+LANCE_RESET);
767
768 /* The DMA controller is used as a no-operation slave, "cascade mode". */
769 if (dev->dma != 4) {
770 unsigned long flags=claim_dma_lock();
771 enable_dma(dev->dma);
772 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
773 release_dma_lock(flags);
774 }
775
776 /* Un-Reset the LANCE, needed only for the NE2100. */
777 if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
778 outw(0, ioaddr+LANCE_RESET);
779
780 if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
781 /* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */
782 outw(0x0002, ioaddr+LANCE_ADDR);
783 /* Only touch autoselect bit. */
784 outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
785 }
786
787 if (lance_debug > 1)
788 printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
789 dev->name, dev->irq, dev->dma,
790 (u32) isa_virt_to_bus(lp->tx_ring),
791 (u32) isa_virt_to_bus(lp->rx_ring),
792 (u32) isa_virt_to_bus(&lp->init_block));
793
794 lance_init_ring(dev, GFP_KERNEL);
795 /* Re-initialize the LANCE, and start it when done. */
796 outw(0x0001, ioaddr+LANCE_ADDR);
797 outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
798 outw(0x0002, ioaddr+LANCE_ADDR);
799 outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
800
801 outw(0x0004, ioaddr+LANCE_ADDR);
802 outw(0x0915, ioaddr+LANCE_DATA);
803
804 outw(0x0000, ioaddr+LANCE_ADDR);
805 outw(0x0001, ioaddr+LANCE_DATA);
806
807 netif_start_queue (dev);
808
809 i = 0;
810 while (i++ < 100)
811 if (inw(ioaddr+LANCE_DATA) & 0x0100)
812 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400813 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
815 * reports that doing so triggers a bug in the '974.
816 */
817 outw(0x0042, ioaddr+LANCE_DATA);
818
819 if (lance_debug > 2)
820 printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
821 dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
822
823 return 0; /* Always succeed */
824}
825
826/* The LANCE has been halted for one reason or another (busmaster memory
827 arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
828 etc.). Modern LANCE variants always reload their ring-buffer
829 configuration when restarted, so we must reinitialize our ring
830 context before restarting. As part of this reinitialization,
831 find all packets still on the Tx ring and pretend that they had been
832 sent (in effect, drop the packets on the floor) - the higher-level
833 protocols will time out and retransmit. It'd be better to shuffle
834 these skbs to a temp list and then actually re-Tx them after
835 restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
836*/
837
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400838static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839lance_purge_ring(struct net_device *dev)
840{
Wang Chenc0103602008-11-20 04:05:56 -0800841 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 int i;
843
844 /* Free all the skbuffs in the Rx and Tx queues. */
845 for (i = 0; i < RX_RING_SIZE; i++) {
846 struct sk_buff *skb = lp->rx_skbuff[i];
847 lp->rx_skbuff[i] = NULL;
848 lp->rx_ring[i].base = 0; /* Not owned by LANCE chip. */
849 if (skb)
850 dev_kfree_skb_any(skb);
851 }
852 for (i = 0; i < TX_RING_SIZE; i++) {
853 if (lp->tx_skbuff[i]) {
854 dev_kfree_skb_any(lp->tx_skbuff[i]);
855 lp->tx_skbuff[i] = NULL;
856 }
857 }
858}
859
860
861/* Initialize the LANCE Rx and Tx rings. */
862static void
Al Viro9e249742005-10-21 03:22:29 -0400863lance_init_ring(struct net_device *dev, gfp_t gfp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864{
Wang Chenc0103602008-11-20 04:05:56 -0800865 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 int i;
867
868 lp->cur_rx = lp->cur_tx = 0;
869 lp->dirty_rx = lp->dirty_tx = 0;
870
871 for (i = 0; i < RX_RING_SIZE; i++) {
872 struct sk_buff *skb;
873 void *rx_buff;
874
875 skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
876 lp->rx_skbuff[i] = skb;
877 if (skb) {
878 skb->dev = dev;
David S. Miller689be432005-06-28 15:25:31 -0700879 rx_buff = skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 } else
881 rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
882 if (rx_buff == NULL)
883 lp->rx_ring[i].base = 0;
884 else
885 lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
886 lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
887 }
888 /* The Tx buffer address is filled in as needed, but we do need to clear
889 the upper ownership bit. */
890 for (i = 0; i < TX_RING_SIZE; i++) {
891 lp->tx_skbuff[i] = NULL;
892 lp->tx_ring[i].base = 0;
893 }
894
895 lp->init_block.mode = 0x0000;
896 for (i = 0; i < 6; i++)
897 lp->init_block.phys_addr[i] = dev->dev_addr[i];
898 lp->init_block.filter[0] = 0x00000000;
899 lp->init_block.filter[1] = 0x00000000;
900 lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
901 lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
902}
903
904static void
905lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
906{
Wang Chenc0103602008-11-20 04:05:56 -0800907 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 if (must_reinit ||
910 (chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
911 lance_purge_ring(dev);
912 lance_init_ring(dev, GFP_ATOMIC);
913 }
914 outw(0x0000, dev->base_addr + LANCE_ADDR);
915 outw(csr0_bits, dev->base_addr + LANCE_DATA);
916}
917
918
919static void lance_tx_timeout (struct net_device *dev)
920{
Wang Chenc0103602008-11-20 04:05:56 -0800921 struct lance_private *lp = (struct lance_private *) dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 int ioaddr = dev->base_addr;
923
924 outw (0, ioaddr + LANCE_ADDR);
925 printk ("%s: transmit timed out, status %4.4x, resetting.\n",
926 dev->name, inw (ioaddr + LANCE_DATA));
927 outw (0x0004, ioaddr + LANCE_DATA);
928 lp->stats.tx_errors++;
929#ifndef final_version
930 if (lance_debug > 3) {
931 int i;
932 printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
933 lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
934 lp->cur_rx);
935 for (i = 0; i < RX_RING_SIZE; i++)
936 printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
937 lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
938 lp->rx_ring[i].msg_length);
939 for (i = 0; i < TX_RING_SIZE; i++)
940 printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
941 lp->tx_ring[i].base, -lp->tx_ring[i].length,
942 lp->tx_ring[i].misc);
943 printk ("\n");
944 }
945#endif
946 lance_restart (dev, 0x0043, 1);
947
948 dev->trans_start = jiffies;
949 netif_wake_queue (dev);
950}
951
952
Stephen Hemminger613573252009-08-31 19:50:58 +0000953static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
954 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
Wang Chenc0103602008-11-20 04:05:56 -0800956 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 int ioaddr = dev->base_addr;
958 int entry;
959 unsigned long flags;
960
961 spin_lock_irqsave(&lp->devlock, flags);
962
963 if (lance_debug > 3) {
964 outw(0x0000, ioaddr+LANCE_ADDR);
965 printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
966 inw(ioaddr+LANCE_DATA));
967 outw(0x0000, ioaddr+LANCE_DATA);
968 }
969
970 /* Fill in a Tx ring entry */
971
972 /* Mask to ring buffer boundary. */
973 entry = lp->cur_tx & TX_RING_MOD_MASK;
974
975 /* Caution: the write order is important here, set the base address
976 with the "ownership" bits last. */
977
978 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
979 if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
980 if (skb->len < ETH_ZLEN) {
Herbert Xu5b057c62006-06-23 02:06:41 -0700981 if (skb_padto(skb, ETH_ZLEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 goto out;
983 lp->tx_ring[entry].length = -ETH_ZLEN;
984 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400985 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 lp->tx_ring[entry].length = -skb->len;
987 } else
988 lp->tx_ring[entry].length = -skb->len;
989
990 lp->tx_ring[entry].misc = 0x0000;
991
992 lp->stats.tx_bytes += skb->len;
993
994 /* If any part of this buffer is >16M we must copy it to a low-memory
995 buffer. */
996 if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
997 if (lance_debug > 5)
998 printk("%s: bouncing a high-memory packet (%#x).\n",
999 dev->name, (u32)isa_virt_to_bus(skb->data));
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -03001000 skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 lp->tx_ring[entry].base =
1002 ((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
1003 dev_kfree_skb(skb);
1004 } else {
1005 lp->tx_skbuff[entry] = skb;
1006 lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
1007 }
1008 lp->cur_tx++;
1009
1010 /* Trigger an immediate send poll. */
1011 outw(0x0000, ioaddr+LANCE_ADDR);
1012 outw(0x0048, ioaddr+LANCE_DATA);
1013
1014 dev->trans_start = jiffies;
1015
1016 if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
1017 netif_stop_queue(dev);
1018
1019out:
1020 spin_unlock_irqrestore(&lp->devlock, flags);
Patrick McHardy6ed10652009-06-23 06:03:08 +00001021 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022}
1023
1024/* The LANCE interrupt handler. */
David Howells7d12e782006-10-05 14:55:46 +01001025static irqreturn_t lance_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026{
1027 struct net_device *dev = dev_id;
1028 struct lance_private *lp;
1029 int csr0, ioaddr, boguscnt=10;
1030 int must_restart;
1031
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 ioaddr = dev->base_addr;
Wang Chenc0103602008-11-20 04:05:56 -08001033 lp = dev->ml_priv;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 spin_lock (&lp->devlock);
1036
1037 outw(0x00, dev->base_addr + LANCE_ADDR);
Joe Perches8e95a202009-12-03 07:58:21 +00001038 while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600 &&
1039 --boguscnt >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 /* Acknowledge all of the current interrupt sources ASAP. */
1041 outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
1042
1043 must_restart = 0;
1044
1045 if (lance_debug > 5)
1046 printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
1047 dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
1048
1049 if (csr0 & 0x0400) /* Rx interrupt */
1050 lance_rx(dev);
1051
1052 if (csr0 & 0x0200) { /* Tx-done interrupt */
1053 int dirty_tx = lp->dirty_tx;
1054
1055 while (dirty_tx < lp->cur_tx) {
1056 int entry = dirty_tx & TX_RING_MOD_MASK;
1057 int status = lp->tx_ring[entry].base;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001058
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 if (status < 0)
1060 break; /* It still hasn't been Txed */
1061
1062 lp->tx_ring[entry].base = 0;
1063
1064 if (status & 0x40000000) {
1065 /* There was an major error, log it. */
1066 int err_status = lp->tx_ring[entry].misc;
1067 lp->stats.tx_errors++;
1068 if (err_status & 0x0400) lp->stats.tx_aborted_errors++;
1069 if (err_status & 0x0800) lp->stats.tx_carrier_errors++;
1070 if (err_status & 0x1000) lp->stats.tx_window_errors++;
1071 if (err_status & 0x4000) {
1072 /* Ackk! On FIFO errors the Tx unit is turned off! */
1073 lp->stats.tx_fifo_errors++;
1074 /* Remove this verbosity later! */
1075 printk("%s: Tx FIFO error! Status %4.4x.\n",
1076 dev->name, csr0);
1077 /* Restart the chip. */
1078 must_restart = 1;
1079 }
1080 } else {
1081 if (status & 0x18000000)
1082 lp->stats.collisions++;
1083 lp->stats.tx_packets++;
1084 }
1085
1086 /* We must free the original skb if it's not a data-only copy
1087 in the bounce buffer. */
1088 if (lp->tx_skbuff[entry]) {
1089 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1090 lp->tx_skbuff[entry] = NULL;
1091 }
1092 dirty_tx++;
1093 }
1094
1095#ifndef final_version
1096 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
1097 printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
1098 dirty_tx, lp->cur_tx,
1099 netif_queue_stopped(dev) ? "yes" : "no");
1100 dirty_tx += TX_RING_SIZE;
1101 }
1102#endif
1103
1104 /* if the ring is no longer full, accept more packets */
1105 if (netif_queue_stopped(dev) &&
1106 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
1107 netif_wake_queue (dev);
1108
1109 lp->dirty_tx = dirty_tx;
1110 }
1111
1112 /* Log misc errors. */
1113 if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */
1114 if (csr0 & 0x1000) lp->stats.rx_errors++; /* Missed a Rx frame. */
1115 if (csr0 & 0x0800) {
1116 printk("%s: Bus master arbitration failure, status %4.4x.\n",
1117 dev->name, csr0);
1118 /* Restart the chip. */
1119 must_restart = 1;
1120 }
1121
1122 if (must_restart) {
1123 /* stop the chip to clear the error condition, then restart */
1124 outw(0x0000, dev->base_addr + LANCE_ADDR);
1125 outw(0x0004, dev->base_addr + LANCE_DATA);
1126 lance_restart(dev, 0x0002, 0);
1127 }
1128 }
1129
1130 /* Clear any other interrupt, and set interrupt enable. */
1131 outw(0x0000, dev->base_addr + LANCE_ADDR);
1132 outw(0x7940, dev->base_addr + LANCE_DATA);
1133
1134 if (lance_debug > 4)
1135 printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
1136 dev->name, inw(ioaddr + LANCE_ADDR),
1137 inw(dev->base_addr + LANCE_DATA));
1138
1139 spin_unlock (&lp->devlock);
1140 return IRQ_HANDLED;
1141}
1142
1143static int
1144lance_rx(struct net_device *dev)
1145{
Wang Chenc0103602008-11-20 04:05:56 -08001146 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 int entry = lp->cur_rx & RX_RING_MOD_MASK;
1148 int i;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001149
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 /* If we own the next entry, it's a new packet. Send it up. */
1151 while (lp->rx_ring[entry].base >= 0) {
1152 int status = lp->rx_ring[entry].base >> 24;
1153
1154 if (status != 0x03) { /* There was an error. */
1155 /* There is a tricky error noted by John Murphy,
1156 <murf@perftech.com> to Russ Nelson: Even with full-sized
1157 buffers it's possible for a jabber packet to use two
1158 buffers, with only the last correctly noting the error. */
1159 if (status & 0x01) /* Only count a general error at the */
1160 lp->stats.rx_errors++; /* end of a packet.*/
1161 if (status & 0x20) lp->stats.rx_frame_errors++;
1162 if (status & 0x10) lp->stats.rx_over_errors++;
1163 if (status & 0x08) lp->stats.rx_crc_errors++;
1164 if (status & 0x04) lp->stats.rx_fifo_errors++;
1165 lp->rx_ring[entry].base &= 0x03ffffff;
1166 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001167 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 {
1169 /* Malloc up new buffer, compatible with net3. */
1170 short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
1171 struct sk_buff *skb;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 if(pkt_len<60)
1174 {
1175 printk("%s: Runt packet!\n",dev->name);
1176 lp->stats.rx_errors++;
1177 }
1178 else
1179 {
1180 skb = dev_alloc_skb(pkt_len+2);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001181 if (skb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 {
1183 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1184 for (i=0; i < RX_RING_SIZE; i++)
1185 if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
1186 break;
1187
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001188 if (i > RX_RING_SIZE -2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 {
1190 lp->stats.rx_dropped++;
1191 lp->rx_ring[entry].base |= 0x80000000;
1192 lp->cur_rx++;
1193 }
1194 break;
1195 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 skb_reserve(skb,2); /* 16 byte align */
1197 skb_put(skb,pkt_len); /* Make room */
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001198 skb_copy_to_linear_data(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 (unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001200 pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 skb->protocol=eth_type_trans(skb,dev);
1202 netif_rx(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 lp->stats.rx_packets++;
1204 lp->stats.rx_bytes+=pkt_len;
1205 }
1206 }
1207 /* The docs say that the buffer length isn't touched, but Andrew Boyd
1208 of QNX reports that some revs of the 79C965 clear it. */
1209 lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
1210 lp->rx_ring[entry].base |= 0x80000000;
1211 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1212 }
1213
1214 /* We should check that at least two ring entries are free. If not,
1215 we should free one and mark stats->rx_dropped++. */
1216
1217 return 0;
1218}
1219
1220static int
1221lance_close(struct net_device *dev)
1222{
1223 int ioaddr = dev->base_addr;
Wang Chenc0103602008-11-20 04:05:56 -08001224 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226 netif_stop_queue (dev);
1227
1228 if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
1229 outw(112, ioaddr+LANCE_ADDR);
1230 lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
1231 }
1232 outw(0, ioaddr+LANCE_ADDR);
1233
1234 if (lance_debug > 1)
1235 printk("%s: Shutting down ethercard, status was %2.2x.\n",
1236 dev->name, inw(ioaddr+LANCE_DATA));
1237
1238 /* We stop the LANCE here -- it occasionally polls
1239 memory if we don't. */
1240 outw(0x0004, ioaddr+LANCE_DATA);
1241
1242 if (dev->dma != 4)
1243 {
1244 unsigned long flags=claim_dma_lock();
1245 disable_dma(dev->dma);
1246 release_dma_lock(flags);
1247 }
1248 free_irq(dev->irq, dev);
1249
1250 lance_purge_ring(dev);
1251
1252 return 0;
1253}
1254
1255static struct net_device_stats *lance_get_stats(struct net_device *dev)
1256{
Wang Chenc0103602008-11-20 04:05:56 -08001257 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
1260 short ioaddr = dev->base_addr;
1261 short saved_addr;
1262 unsigned long flags;
1263
1264 spin_lock_irqsave(&lp->devlock, flags);
1265 saved_addr = inw(ioaddr+LANCE_ADDR);
1266 outw(112, ioaddr+LANCE_ADDR);
1267 lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
1268 outw(saved_addr, ioaddr+LANCE_ADDR);
1269 spin_unlock_irqrestore(&lp->devlock, flags);
1270 }
1271
1272 return &lp->stats;
1273}
1274
1275/* Set or clear the multicast filter for this adaptor.
1276 */
1277
1278static void set_multicast_list(struct net_device *dev)
1279{
1280 short ioaddr = dev->base_addr;
1281
1282 outw(0, ioaddr+LANCE_ADDR);
1283 outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance. */
1284
1285 if (dev->flags&IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 outw(15, ioaddr+LANCE_ADDR);
1287 outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */
1288 } else {
1289 short multicast_table[4];
1290 int i;
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001291 int num_addrs=netdev_mc_count(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 if(dev->flags&IFF_ALLMULTI)
1293 num_addrs=1;
1294 /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */
1295 memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
1296 for (i = 0; i < 4; i++) {
1297 outw(8 + i, ioaddr+LANCE_ADDR);
1298 outw(multicast_table[i], ioaddr+LANCE_DATA);
1299 }
1300 outw(15, ioaddr+LANCE_ADDR);
1301 outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */
1302 }
1303
1304 lance_restart(dev, 0x0142, 0); /* Resume normal operation */
1305
1306}
1307