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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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev);
304static int lance_rx(struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100305static irqreturn_t lance_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306static int lance_close(struct net_device *dev);
307static struct net_device_stats *lance_get_stats(struct net_device *dev);
308static void set_multicast_list(struct net_device *dev);
309static void lance_tx_timeout (struct net_device *dev);
310
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313#ifdef MODULE
314#define MAX_CARDS 8 /* Max number of interfaces (cards) per module */
315
316static struct net_device *dev_lance[MAX_CARDS];
317static int io[MAX_CARDS];
318static int dma[MAX_CARDS];
319static int irq[MAX_CARDS];
320
321module_param_array(io, int, NULL, 0);
322module_param_array(dma, int, NULL, 0);
323module_param_array(irq, int, NULL, 0);
324module_param(lance_debug, int, 0);
325MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
326MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
327MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
328MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
329
Andrew Morton3805f0e2006-08-14 23:00:03 -0700330int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
332 struct net_device *dev;
333 int this_dev, found = 0;
334
335 for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
336 if (io[this_dev] == 0) {
337 if (this_dev != 0) /* only complain once */
338 break;
339 printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
340 return -EPERM;
341 }
342 dev = alloc_etherdev(0);
343 if (!dev)
344 break;
345 dev->irq = irq[this_dev];
346 dev->base_addr = io[this_dev];
347 dev->dma = dma[this_dev];
348 if (do_lance_probe(dev) == 0) {
b1fc5502005-05-12 20:11:55 -0400349 dev_lance[found++] = dev;
350 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
352 free_netdev(dev);
353 break;
354 }
355 if (found != 0)
356 return 0;
357 return -ENXIO;
358}
359
Denis Vlasenko64916f12006-01-05 22:45:47 -0800360static void cleanup_card(struct net_device *dev)
361{
Wang Chenc0103602008-11-20 04:05:56 -0800362 struct lance_private *lp = dev->ml_priv;
Denis Vlasenko64916f12006-01-05 22:45:47 -0800363 if (dev->dma != 4)
364 free_dma(dev->dma);
365 release_region(dev->base_addr, LANCE_TOTAL_SIZE);
366 kfree(lp->tx_bounce_buffs);
367 kfree((void*)lp->rx_buffs);
368 kfree(lp);
369}
370
Al Viroafc8eb42006-06-14 18:50:53 -0400371void __exit cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
373 int this_dev;
374
375 for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
376 struct net_device *dev = dev_lance[this_dev];
377 if (dev) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400378 unregister_netdev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 cleanup_card(dev);
380 free_netdev(dev);
381 }
382 }
383}
384#endif /* MODULE */
385MODULE_LICENSE("GPL");
386
387
388/* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other
389 board probes now that kmalloc() can allocate ISA DMA-able regions.
390 This also allows the LANCE driver to be used as a module.
391 */
392static int __init do_lance_probe(struct net_device *dev)
393{
Hannes Eder00137da2009-02-14 11:13:24 +0000394 unsigned int *port;
395 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 if (high_memory <= phys_to_virt(16*1024*1024))
398 lance_need_isa_bounce_buffers = 0;
399
400 for (port = lance_portlist; *port; port++) {
401 int ioaddr = *port;
402 struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
403 "lance-probe");
404
405 if (r) {
406 /* Detect the card with minimal I/O reads */
407 char offset14 = inb(ioaddr + 14);
408 int card;
409 for (card = 0; card < NUM_CARDS; ++card)
410 if (cards[card].id_offset14 == offset14)
411 break;
412 if (card < NUM_CARDS) {/*yes, the first byte matches*/
413 char offset15 = inb(ioaddr + 15);
414 for (card = 0; card < NUM_CARDS; ++card)
415 if ((cards[card].id_offset14 == offset14) &&
416 (cards[card].id_offset15 == offset15))
417 break;
418 }
419 if (card < NUM_CARDS) { /*Signature OK*/
420 result = lance_probe1(dev, ioaddr, 0, 0);
421 if (!result) {
Wang Chenc0103602008-11-20 04:05:56 -0800422 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 int ver = lp->chip_version;
424
425 r->name = chip_table[ver].name;
426 return 0;
427 }
428 }
429 release_region(ioaddr, LANCE_TOTAL_SIZE);
430 }
431 }
432 return -ENODEV;
433}
434
435#ifndef MODULE
436struct net_device * __init lance_probe(int unit)
437{
438 struct net_device *dev = alloc_etherdev(0);
439 int err;
440
441 if (!dev)
442 return ERR_PTR(-ENODEV);
443
444 sprintf(dev->name, "eth%d", unit);
445 netdev_boot_setup_check(dev);
446
447 err = do_lance_probe(dev);
448 if (err)
449 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451out:
452 free_netdev(dev);
453 return ERR_PTR(err);
454}
455#endif
456
Stephen Hemminger462540b2009-03-26 15:11:32 +0000457static const struct net_device_ops lance_netdev_ops = {
458 .ndo_open = lance_open,
459 .ndo_start_xmit = lance_start_xmit,
460 .ndo_stop = lance_close,
461 .ndo_get_stats = lance_get_stats,
462 .ndo_set_multicast_list = set_multicast_list,
463 .ndo_tx_timeout = lance_tx_timeout,
464 .ndo_change_mtu = eth_change_mtu,
465 .ndo_set_mac_address = eth_mac_addr,
466 .ndo_validate_addr = eth_validate_addr,
467};
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
470{
471 struct lance_private *lp;
Hannes Eder00137da2009-02-14 11:13:24 +0000472 unsigned long dma_channels; /* Mark spuriously-busy DMA channels */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 int i, reset_val, lance_version;
474 const char *chipname;
475 /* Flags for specific chips or boards. */
Hannes Eder00137da2009-02-14 11:13:24 +0000476 unsigned char hpJ2405A = 0; /* HP ISA adaptor */
477 int hp_builtin = 0; /* HP on-board ethernet. */
478 static int did_version; /* Already printed version info. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 unsigned long flags;
480 int err = -ENOMEM;
Al Viroc44fec12006-03-24 03:15:41 -0800481 void __iomem *bios;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 /* First we look for special cases.
484 Check for HP's on-board ethernet by looking for 'HP' in the BIOS.
485 There are two HP versions, check the BIOS for the configuration port.
486 This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com.
487 */
Al Viroc44fec12006-03-24 03:15:41 -0800488 bios = ioremap(0xf00f0, 0x14);
489 if (!bios)
490 return -ENOMEM;
491 if (readw(bios + 0x12) == 0x5048) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
Al Viroc44fec12006-03-24 03:15:41 -0800493 int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 /* We can have boards other than the built-in! Verify this is on-board. */
495 if ((inb(hp_port) & 0xc0) == 0x80
496 && ioaddr_table[inb(hp_port) & 3] == ioaddr)
497 hp_builtin = hp_port;
498 }
Al Viroc44fec12006-03-24 03:15:41 -0800499 iounmap(bios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 /* We also recognize the HP Vectra on-board here, but check below. */
501 hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00
502 && inb(ioaddr+2) == 0x09);
503
504 /* Reset the LANCE. */
505 reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */
506
507 /* The Un-Reset needed is only needed for the real NE2100, and will
508 confuse the HP board. */
509 if (!hpJ2405A)
510 outw(reset_val, ioaddr+LANCE_RESET);
511
512 outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */
513 if (inw(ioaddr+LANCE_DATA) != 0x0004)
514 return -ENODEV;
515
516 /* Get the version of the chip. */
517 outw(88, ioaddr+LANCE_ADDR);
518 if (inw(ioaddr+LANCE_ADDR) != 88) {
519 lance_version = 0;
520 } else { /* Good, it's a newer chip. */
521 int chip_version = inw(ioaddr+LANCE_DATA);
522 outw(89, ioaddr+LANCE_ADDR);
523 chip_version |= inw(ioaddr+LANCE_DATA) << 16;
524 if (lance_debug > 2)
525 printk(" LANCE chip version is %#x.\n", chip_version);
526 if ((chip_version & 0xfff) != 0x003)
527 return -ENODEV;
528 chip_version = (chip_version >> 12) & 0xffff;
529 for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
530 if (chip_table[lance_version].id_number == chip_version)
531 break;
532 }
533 }
534
Wang Chenb74ca3a2008-12-08 01:14:16 -0800535 /* We can't allocate private data from alloc_etherdev() because it must
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 a ISA DMA-able region. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 chipname = chip_table[lance_version].name;
Joe Perches0795af52007-10-03 17:59:30 -0700538 printk("%s: %s at %#3x, ", dev->name, chipname, ioaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540 /* There is a 16 byte station address PROM at the base address.
541 The first six bytes are the station address. */
542 for (i = 0; i < 6; i++)
Joe Perches0795af52007-10-03 17:59:30 -0700543 dev->dev_addr[i] = inb(ioaddr + i);
Johannes Berge1749612008-10-27 15:59:26 -0700544 printk("%pM", dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
546 dev->base_addr = ioaddr;
547 /* Make certain the data structures used by the LANCE are aligned and DMAble. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400548
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700549 lp = kzalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if(lp==NULL)
551 return -ENODEV;
552 if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
Wang Chenc0103602008-11-20 04:05:56 -0800553 dev->ml_priv = lp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 lp->name = chipname;
555 lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE,
556 GFP_DMA | GFP_KERNEL);
557 if (!lp->rx_buffs)
558 goto out_lp;
559 if (lance_need_isa_bounce_buffers) {
560 lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE,
561 GFP_DMA | GFP_KERNEL);
562 if (!lp->tx_bounce_buffs)
563 goto out_rx;
564 } else
565 lp->tx_bounce_buffs = NULL;
566
567 lp->chip_version = lance_version;
568 spin_lock_init(&lp->devlock);
569
570 lp->init_block.mode = 0x0003; /* Disable Rx and Tx. */
571 for (i = 0; i < 6; i++)
572 lp->init_block.phys_addr[i] = dev->dev_addr[i];
573 lp->init_block.filter[0] = 0x00000000;
574 lp->init_block.filter[1] = 0x00000000;
575 lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
576 lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
577
578 outw(0x0001, ioaddr+LANCE_ADDR);
579 inw(ioaddr+LANCE_ADDR);
580 outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
581 outw(0x0002, ioaddr+LANCE_ADDR);
582 inw(ioaddr+LANCE_ADDR);
583 outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
584 outw(0x0000, ioaddr+LANCE_ADDR);
585 inw(ioaddr+LANCE_ADDR);
586
587 if (irq) { /* Set iff PCI card. */
588 dev->dma = 4; /* Native bus-master, no DMA channel needed. */
589 dev->irq = irq;
590 } else if (hp_builtin) {
591 static const char dma_tbl[4] = {3, 5, 6, 0};
592 static const char irq_tbl[4] = {3, 4, 5, 9};
593 unsigned char port_val = inb(hp_builtin);
594 dev->dma = dma_tbl[(port_val >> 4) & 3];
595 dev->irq = irq_tbl[(port_val >> 2) & 3];
596 printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
597 } else if (hpJ2405A) {
598 static const char dma_tbl[4] = {3, 5, 6, 7};
599 static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
600 short reset_val = inw(ioaddr+LANCE_RESET);
601 dev->dma = dma_tbl[(reset_val >> 2) & 3];
602 dev->irq = irq_tbl[(reset_val >> 4) & 7];
603 printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
604 } else if (lance_version == PCNET_ISAP) { /* The plug-n-play version. */
605 short bus_info;
606 outw(8, ioaddr+LANCE_ADDR);
607 bus_info = inw(ioaddr+LANCE_BUS_IF);
608 dev->dma = bus_info & 0x07;
609 dev->irq = (bus_info >> 4) & 0x0F;
610 } else {
611 /* The DMA channel may be passed in PARAM1. */
612 if (dev->mem_start & 0x07)
613 dev->dma = dev->mem_start & 0x07;
614 }
615
616 if (dev->dma == 0) {
617 /* Read the DMA channel status register, so that we can avoid
618 stuck DMA channels in the DMA detection below. */
619 dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
620 (inb(DMA2_STAT_REG) & 0xf0);
621 }
622 err = -ENODEV;
623 if (dev->irq >= 2)
624 printk(" assigned IRQ %d", dev->irq);
625 else if (lance_version != 0) { /* 7990 boards need DMA detection first. */
626 unsigned long irq_mask;
627
628 /* To auto-IRQ we enable the initialization-done and DMA error
629 interrupts. For ISA boards we get a DMA error, but VLB and PCI
630 boards will work. */
631 irq_mask = probe_irq_on();
632
633 /* Trigger an initialization just for the interrupt. */
634 outw(0x0041, ioaddr+LANCE_DATA);
635
636 mdelay(20);
637 dev->irq = probe_irq_off(irq_mask);
638 if (dev->irq)
639 printk(", probed IRQ %d", dev->irq);
640 else {
641 printk(", failed to detect IRQ line.\n");
642 goto out_tx;
643 }
644
645 /* Check for the initialization done bit, 0x0100, which means
646 that we don't need a DMA channel. */
647 if (inw(ioaddr+LANCE_DATA) & 0x0100)
648 dev->dma = 4;
649 }
650
651 if (dev->dma == 4) {
652 printk(", no DMA needed.\n");
653 } else if (dev->dma) {
654 if (request_dma(dev->dma, chipname)) {
655 printk("DMA %d allocation failed.\n", dev->dma);
656 goto out_tx;
657 } else
658 printk(", assigned DMA %d.\n", dev->dma);
659 } else { /* OK, we have to auto-DMA. */
660 for (i = 0; i < 4; i++) {
661 static const char dmas[] = { 5, 6, 7, 3 };
662 int dma = dmas[i];
663 int boguscnt;
664
665 /* Don't enable a permanently busy DMA channel, or the machine
666 will hang. */
667 if (test_bit(dma, &dma_channels))
668 continue;
669 outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */
670 if (request_dma(dma, chipname))
671 continue;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 flags=claim_dma_lock();
674 set_dma_mode(dma, DMA_MODE_CASCADE);
675 enable_dma(dma);
676 release_dma_lock(flags);
677
678 /* Trigger an initialization. */
679 outw(0x0001, ioaddr+LANCE_DATA);
680 for (boguscnt = 100; boguscnt > 0; --boguscnt)
681 if (inw(ioaddr+LANCE_DATA) & 0x0900)
682 break;
683 if (inw(ioaddr+LANCE_DATA) & 0x0100) {
684 dev->dma = dma;
685 printk(", DMA %d.\n", dev->dma);
686 break;
687 } else {
688 flags=claim_dma_lock();
689 disable_dma(dma);
690 release_dma_lock(flags);
691 free_dma(dma);
692 }
693 }
694 if (i == 4) { /* Failure: bail. */
695 printk("DMA detection failed.\n");
696 goto out_tx;
697 }
698 }
699
700 if (lance_version == 0 && dev->irq == 0) {
701 /* We may auto-IRQ now that we have a DMA channel. */
702 /* Trigger an initialization just for the interrupt. */
703 unsigned long irq_mask;
704
705 irq_mask = probe_irq_on();
706 outw(0x0041, ioaddr+LANCE_DATA);
707
708 mdelay(40);
709 dev->irq = probe_irq_off(irq_mask);
710 if (dev->irq == 0) {
711 printk(" Failed to detect the 7990 IRQ line.\n");
712 goto out_dma;
713 }
714 printk(" Auto-IRQ detected IRQ%d.\n", dev->irq);
715 }
716
717 if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
718 /* Turn on auto-select of media (10baseT or BNC) so that the user
719 can watch the LEDs even if the board isn't opened. */
720 outw(0x0002, ioaddr+LANCE_ADDR);
721 /* Don't touch 10base2 power bit. */
722 outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
723 }
724
725 if (lance_debug > 0 && did_version++ == 0)
726 printk(version);
727
728 /* The LANCE-specific entries in the device structure. */
Stephen Hemminger462540b2009-03-26 15:11:32 +0000729 dev->netdev_ops = &lance_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 dev->watchdog_timeo = TX_TIMEOUT;
731
b1fc5502005-05-12 20:11:55 -0400732 err = register_netdev(dev);
733 if (err)
734 goto out_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 return 0;
736out_dma:
737 if (dev->dma != 4)
738 free_dma(dev->dma);
739out_tx:
740 kfree(lp->tx_bounce_buffs);
741out_rx:
742 kfree((void*)lp->rx_buffs);
743out_lp:
744 kfree(lp);
745 return err;
746}
747
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749static int
750lance_open(struct net_device *dev)
751{
Wang Chenc0103602008-11-20 04:05:56 -0800752 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 int ioaddr = dev->base_addr;
754 int i;
755
756 if (dev->irq == 0 ||
757 request_irq(dev->irq, &lance_interrupt, 0, lp->name, dev)) {
758 return -EAGAIN;
759 }
760
761 /* We used to allocate DMA here, but that was silly.
762 DMA lines can't be shared! We now permanently allocate them. */
763
764 /* Reset the LANCE */
765 inw(ioaddr+LANCE_RESET);
766
767 /* The DMA controller is used as a no-operation slave, "cascade mode". */
768 if (dev->dma != 4) {
769 unsigned long flags=claim_dma_lock();
770 enable_dma(dev->dma);
771 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
772 release_dma_lock(flags);
773 }
774
775 /* Un-Reset the LANCE, needed only for the NE2100. */
776 if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
777 outw(0, ioaddr+LANCE_RESET);
778
779 if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
780 /* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */
781 outw(0x0002, ioaddr+LANCE_ADDR);
782 /* Only touch autoselect bit. */
783 outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
784 }
785
786 if (lance_debug > 1)
787 printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
788 dev->name, dev->irq, dev->dma,
789 (u32) isa_virt_to_bus(lp->tx_ring),
790 (u32) isa_virt_to_bus(lp->rx_ring),
791 (u32) isa_virt_to_bus(&lp->init_block));
792
793 lance_init_ring(dev, GFP_KERNEL);
794 /* Re-initialize the LANCE, and start it when done. */
795 outw(0x0001, ioaddr+LANCE_ADDR);
796 outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
797 outw(0x0002, ioaddr+LANCE_ADDR);
798 outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
799
800 outw(0x0004, ioaddr+LANCE_ADDR);
801 outw(0x0915, ioaddr+LANCE_DATA);
802
803 outw(0x0000, ioaddr+LANCE_ADDR);
804 outw(0x0001, ioaddr+LANCE_DATA);
805
806 netif_start_queue (dev);
807
808 i = 0;
809 while (i++ < 100)
810 if (inw(ioaddr+LANCE_DATA) & 0x0100)
811 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400812 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
814 * reports that doing so triggers a bug in the '974.
815 */
816 outw(0x0042, ioaddr+LANCE_DATA);
817
818 if (lance_debug > 2)
819 printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
820 dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
821
822 return 0; /* Always succeed */
823}
824
825/* The LANCE has been halted for one reason or another (busmaster memory
826 arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
827 etc.). Modern LANCE variants always reload their ring-buffer
828 configuration when restarted, so we must reinitialize our ring
829 context before restarting. As part of this reinitialization,
830 find all packets still on the Tx ring and pretend that they had been
831 sent (in effect, drop the packets on the floor) - the higher-level
832 protocols will time out and retransmit. It'd be better to shuffle
833 these skbs to a temp list and then actually re-Tx them after
834 restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
835*/
836
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400837static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838lance_purge_ring(struct net_device *dev)
839{
Wang Chenc0103602008-11-20 04:05:56 -0800840 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 int i;
842
843 /* Free all the skbuffs in the Rx and Tx queues. */
844 for (i = 0; i < RX_RING_SIZE; i++) {
845 struct sk_buff *skb = lp->rx_skbuff[i];
846 lp->rx_skbuff[i] = NULL;
847 lp->rx_ring[i].base = 0; /* Not owned by LANCE chip. */
848 if (skb)
849 dev_kfree_skb_any(skb);
850 }
851 for (i = 0; i < TX_RING_SIZE; i++) {
852 if (lp->tx_skbuff[i]) {
853 dev_kfree_skb_any(lp->tx_skbuff[i]);
854 lp->tx_skbuff[i] = NULL;
855 }
856 }
857}
858
859
860/* Initialize the LANCE Rx and Tx rings. */
861static void
Al Viro9e249742005-10-21 03:22:29 -0400862lance_init_ring(struct net_device *dev, gfp_t gfp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863{
Wang Chenc0103602008-11-20 04:05:56 -0800864 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 int i;
866
867 lp->cur_rx = lp->cur_tx = 0;
868 lp->dirty_rx = lp->dirty_tx = 0;
869
870 for (i = 0; i < RX_RING_SIZE; i++) {
871 struct sk_buff *skb;
872 void *rx_buff;
873
874 skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
875 lp->rx_skbuff[i] = skb;
876 if (skb) {
877 skb->dev = dev;
David S. Miller689be432005-06-28 15:25:31 -0700878 rx_buff = skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 } else
880 rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
881 if (rx_buff == NULL)
882 lp->rx_ring[i].base = 0;
883 else
884 lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
885 lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
886 }
887 /* The Tx buffer address is filled in as needed, but we do need to clear
888 the upper ownership bit. */
889 for (i = 0; i < TX_RING_SIZE; i++) {
890 lp->tx_skbuff[i] = NULL;
891 lp->tx_ring[i].base = 0;
892 }
893
894 lp->init_block.mode = 0x0000;
895 for (i = 0; i < 6; i++)
896 lp->init_block.phys_addr[i] = dev->dev_addr[i];
897 lp->init_block.filter[0] = 0x00000000;
898 lp->init_block.filter[1] = 0x00000000;
899 lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
900 lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
901}
902
903static void
904lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
905{
Wang Chenc0103602008-11-20 04:05:56 -0800906 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
908 if (must_reinit ||
909 (chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
910 lance_purge_ring(dev);
911 lance_init_ring(dev, GFP_ATOMIC);
912 }
913 outw(0x0000, dev->base_addr + LANCE_ADDR);
914 outw(csr0_bits, dev->base_addr + LANCE_DATA);
915}
916
917
918static void lance_tx_timeout (struct net_device *dev)
919{
Wang Chenc0103602008-11-20 04:05:56 -0800920 struct lance_private *lp = (struct lance_private *) dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 int ioaddr = dev->base_addr;
922
923 outw (0, ioaddr + LANCE_ADDR);
924 printk ("%s: transmit timed out, status %4.4x, resetting.\n",
925 dev->name, inw (ioaddr + LANCE_DATA));
926 outw (0x0004, ioaddr + LANCE_DATA);
927 lp->stats.tx_errors++;
928#ifndef final_version
929 if (lance_debug > 3) {
930 int i;
931 printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
932 lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
933 lp->cur_rx);
934 for (i = 0; i < RX_RING_SIZE; i++)
935 printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
936 lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
937 lp->rx_ring[i].msg_length);
938 for (i = 0; i < TX_RING_SIZE; i++)
939 printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
940 lp->tx_ring[i].base, -lp->tx_ring[i].length,
941 lp->tx_ring[i].misc);
942 printk ("\n");
943 }
944#endif
945 lance_restart (dev, 0x0043, 1);
946
947 dev->trans_start = jiffies;
948 netif_wake_queue (dev);
949}
950
951
952static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
953{
Wang Chenc0103602008-11-20 04:05:56 -0800954 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 int ioaddr = dev->base_addr;
956 int entry;
957 unsigned long flags;
958
959 spin_lock_irqsave(&lp->devlock, flags);
960
961 if (lance_debug > 3) {
962 outw(0x0000, ioaddr+LANCE_ADDR);
963 printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
964 inw(ioaddr+LANCE_DATA));
965 outw(0x0000, ioaddr+LANCE_DATA);
966 }
967
968 /* Fill in a Tx ring entry */
969
970 /* Mask to ring buffer boundary. */
971 entry = lp->cur_tx & TX_RING_MOD_MASK;
972
973 /* Caution: the write order is important here, set the base address
974 with the "ownership" bits last. */
975
976 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
977 if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
978 if (skb->len < ETH_ZLEN) {
Herbert Xu5b057c62006-06-23 02:06:41 -0700979 if (skb_padto(skb, ETH_ZLEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 goto out;
981 lp->tx_ring[entry].length = -ETH_ZLEN;
982 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400983 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 lp->tx_ring[entry].length = -skb->len;
985 } else
986 lp->tx_ring[entry].length = -skb->len;
987
988 lp->tx_ring[entry].misc = 0x0000;
989
990 lp->stats.tx_bytes += skb->len;
991
992 /* If any part of this buffer is >16M we must copy it to a low-memory
993 buffer. */
994 if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
995 if (lance_debug > 5)
996 printk("%s: bouncing a high-memory packet (%#x).\n",
997 dev->name, (u32)isa_virt_to_bus(skb->data));
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300998 skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 lp->tx_ring[entry].base =
1000 ((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
1001 dev_kfree_skb(skb);
1002 } else {
1003 lp->tx_skbuff[entry] = skb;
1004 lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
1005 }
1006 lp->cur_tx++;
1007
1008 /* Trigger an immediate send poll. */
1009 outw(0x0000, ioaddr+LANCE_ADDR);
1010 outw(0x0048, ioaddr+LANCE_DATA);
1011
1012 dev->trans_start = jiffies;
1013
1014 if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
1015 netif_stop_queue(dev);
1016
1017out:
1018 spin_unlock_irqrestore(&lp->devlock, flags);
1019 return 0;
1020}
1021
1022/* The LANCE interrupt handler. */
David Howells7d12e782006-10-05 14:55:46 +01001023static irqreturn_t lance_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024{
1025 struct net_device *dev = dev_id;
1026 struct lance_private *lp;
1027 int csr0, ioaddr, boguscnt=10;
1028 int must_restart;
1029
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 ioaddr = dev->base_addr;
Wang Chenc0103602008-11-20 04:05:56 -08001031 lp = dev->ml_priv;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 spin_lock (&lp->devlock);
1034
1035 outw(0x00, dev->base_addr + LANCE_ADDR);
1036 while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600
1037 && --boguscnt >= 0) {
1038 /* Acknowledge all of the current interrupt sources ASAP. */
1039 outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
1040
1041 must_restart = 0;
1042
1043 if (lance_debug > 5)
1044 printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
1045 dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
1046
1047 if (csr0 & 0x0400) /* Rx interrupt */
1048 lance_rx(dev);
1049
1050 if (csr0 & 0x0200) { /* Tx-done interrupt */
1051 int dirty_tx = lp->dirty_tx;
1052
1053 while (dirty_tx < lp->cur_tx) {
1054 int entry = dirty_tx & TX_RING_MOD_MASK;
1055 int status = lp->tx_ring[entry].base;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001056
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 if (status < 0)
1058 break; /* It still hasn't been Txed */
1059
1060 lp->tx_ring[entry].base = 0;
1061
1062 if (status & 0x40000000) {
1063 /* There was an major error, log it. */
1064 int err_status = lp->tx_ring[entry].misc;
1065 lp->stats.tx_errors++;
1066 if (err_status & 0x0400) lp->stats.tx_aborted_errors++;
1067 if (err_status & 0x0800) lp->stats.tx_carrier_errors++;
1068 if (err_status & 0x1000) lp->stats.tx_window_errors++;
1069 if (err_status & 0x4000) {
1070 /* Ackk! On FIFO errors the Tx unit is turned off! */
1071 lp->stats.tx_fifo_errors++;
1072 /* Remove this verbosity later! */
1073 printk("%s: Tx FIFO error! Status %4.4x.\n",
1074 dev->name, csr0);
1075 /* Restart the chip. */
1076 must_restart = 1;
1077 }
1078 } else {
1079 if (status & 0x18000000)
1080 lp->stats.collisions++;
1081 lp->stats.tx_packets++;
1082 }
1083
1084 /* We must free the original skb if it's not a data-only copy
1085 in the bounce buffer. */
1086 if (lp->tx_skbuff[entry]) {
1087 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1088 lp->tx_skbuff[entry] = NULL;
1089 }
1090 dirty_tx++;
1091 }
1092
1093#ifndef final_version
1094 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
1095 printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
1096 dirty_tx, lp->cur_tx,
1097 netif_queue_stopped(dev) ? "yes" : "no");
1098 dirty_tx += TX_RING_SIZE;
1099 }
1100#endif
1101
1102 /* if the ring is no longer full, accept more packets */
1103 if (netif_queue_stopped(dev) &&
1104 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
1105 netif_wake_queue (dev);
1106
1107 lp->dirty_tx = dirty_tx;
1108 }
1109
1110 /* Log misc errors. */
1111 if (csr0 & 0x4000) lp->stats.tx_errors++; /* Tx babble. */
1112 if (csr0 & 0x1000) lp->stats.rx_errors++; /* Missed a Rx frame. */
1113 if (csr0 & 0x0800) {
1114 printk("%s: Bus master arbitration failure, status %4.4x.\n",
1115 dev->name, csr0);
1116 /* Restart the chip. */
1117 must_restart = 1;
1118 }
1119
1120 if (must_restart) {
1121 /* stop the chip to clear the error condition, then restart */
1122 outw(0x0000, dev->base_addr + LANCE_ADDR);
1123 outw(0x0004, dev->base_addr + LANCE_DATA);
1124 lance_restart(dev, 0x0002, 0);
1125 }
1126 }
1127
1128 /* Clear any other interrupt, and set interrupt enable. */
1129 outw(0x0000, dev->base_addr + LANCE_ADDR);
1130 outw(0x7940, dev->base_addr + LANCE_DATA);
1131
1132 if (lance_debug > 4)
1133 printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
1134 dev->name, inw(ioaddr + LANCE_ADDR),
1135 inw(dev->base_addr + LANCE_DATA));
1136
1137 spin_unlock (&lp->devlock);
1138 return IRQ_HANDLED;
1139}
1140
1141static int
1142lance_rx(struct net_device *dev)
1143{
Wang Chenc0103602008-11-20 04:05:56 -08001144 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 int entry = lp->cur_rx & RX_RING_MOD_MASK;
1146 int i;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001147
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 /* If we own the next entry, it's a new packet. Send it up. */
1149 while (lp->rx_ring[entry].base >= 0) {
1150 int status = lp->rx_ring[entry].base >> 24;
1151
1152 if (status != 0x03) { /* There was an error. */
1153 /* There is a tricky error noted by John Murphy,
1154 <murf@perftech.com> to Russ Nelson: Even with full-sized
1155 buffers it's possible for a jabber packet to use two
1156 buffers, with only the last correctly noting the error. */
1157 if (status & 0x01) /* Only count a general error at the */
1158 lp->stats.rx_errors++; /* end of a packet.*/
1159 if (status & 0x20) lp->stats.rx_frame_errors++;
1160 if (status & 0x10) lp->stats.rx_over_errors++;
1161 if (status & 0x08) lp->stats.rx_crc_errors++;
1162 if (status & 0x04) lp->stats.rx_fifo_errors++;
1163 lp->rx_ring[entry].base &= 0x03ffffff;
1164 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001165 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 {
1167 /* Malloc up new buffer, compatible with net3. */
1168 short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
1169 struct sk_buff *skb;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001170
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 if(pkt_len<60)
1172 {
1173 printk("%s: Runt packet!\n",dev->name);
1174 lp->stats.rx_errors++;
1175 }
1176 else
1177 {
1178 skb = dev_alloc_skb(pkt_len+2);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001179 if (skb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 {
1181 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1182 for (i=0; i < RX_RING_SIZE; i++)
1183 if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
1184 break;
1185
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001186 if (i > RX_RING_SIZE -2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 {
1188 lp->stats.rx_dropped++;
1189 lp->rx_ring[entry].base |= 0x80000000;
1190 lp->cur_rx++;
1191 }
1192 break;
1193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 skb_reserve(skb,2); /* 16 byte align */
1195 skb_put(skb,pkt_len); /* Make room */
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001196 skb_copy_to_linear_data(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 (unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001198 pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 skb->protocol=eth_type_trans(skb,dev);
1200 netif_rx(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 lp->stats.rx_packets++;
1202 lp->stats.rx_bytes+=pkt_len;
1203 }
1204 }
1205 /* The docs say that the buffer length isn't touched, but Andrew Boyd
1206 of QNX reports that some revs of the 79C965 clear it. */
1207 lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
1208 lp->rx_ring[entry].base |= 0x80000000;
1209 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1210 }
1211
1212 /* We should check that at least two ring entries are free. If not,
1213 we should free one and mark stats->rx_dropped++. */
1214
1215 return 0;
1216}
1217
1218static int
1219lance_close(struct net_device *dev)
1220{
1221 int ioaddr = dev->base_addr;
Wang Chenc0103602008-11-20 04:05:56 -08001222 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 netif_stop_queue (dev);
1225
1226 if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
1227 outw(112, ioaddr+LANCE_ADDR);
1228 lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
1229 }
1230 outw(0, ioaddr+LANCE_ADDR);
1231
1232 if (lance_debug > 1)
1233 printk("%s: Shutting down ethercard, status was %2.2x.\n",
1234 dev->name, inw(ioaddr+LANCE_DATA));
1235
1236 /* We stop the LANCE here -- it occasionally polls
1237 memory if we don't. */
1238 outw(0x0004, ioaddr+LANCE_DATA);
1239
1240 if (dev->dma != 4)
1241 {
1242 unsigned long flags=claim_dma_lock();
1243 disable_dma(dev->dma);
1244 release_dma_lock(flags);
1245 }
1246 free_irq(dev->irq, dev);
1247
1248 lance_purge_ring(dev);
1249
1250 return 0;
1251}
1252
1253static struct net_device_stats *lance_get_stats(struct net_device *dev)
1254{
Wang Chenc0103602008-11-20 04:05:56 -08001255 struct lance_private *lp = dev->ml_priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
1257 if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
1258 short ioaddr = dev->base_addr;
1259 short saved_addr;
1260 unsigned long flags;
1261
1262 spin_lock_irqsave(&lp->devlock, flags);
1263 saved_addr = inw(ioaddr+LANCE_ADDR);
1264 outw(112, ioaddr+LANCE_ADDR);
1265 lp->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
1266 outw(saved_addr, ioaddr+LANCE_ADDR);
1267 spin_unlock_irqrestore(&lp->devlock, flags);
1268 }
1269
1270 return &lp->stats;
1271}
1272
1273/* Set or clear the multicast filter for this adaptor.
1274 */
1275
1276static void set_multicast_list(struct net_device *dev)
1277{
1278 short ioaddr = dev->base_addr;
1279
1280 outw(0, ioaddr+LANCE_ADDR);
1281 outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance. */
1282
1283 if (dev->flags&IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 outw(15, ioaddr+LANCE_ADDR);
1285 outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */
1286 } else {
1287 short multicast_table[4];
1288 int i;
1289 int num_addrs=dev->mc_count;
1290 if(dev->flags&IFF_ALLMULTI)
1291 num_addrs=1;
1292 /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */
1293 memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
1294 for (i = 0; i < 4; i++) {
1295 outw(8 + i, ioaddr+LANCE_ADDR);
1296 outw(multicast_table[i], ioaddr+LANCE_DATA);
1297 }
1298 outw(15, ioaddr+LANCE_ADDR);
1299 outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */
1300 }
1301
1302 lance_restart(dev, 0x0142, 0); /* Resume normal operation */
1303
1304}
1305