ia64/linux-2.6.18-xen.hg

view drivers/net/depca.c @ 897:329ea0ccb344

balloon: try harder to balloon up under memory pressure.

Currently if the balloon driver is unable to increase the guest's
reservation it assumes the failure was due to reaching its full
allocation, gives up on the ballooning operation and records the limit
it reached as the "hard limit". The driver will not try again until
the target is set again (even to the same value).

However it is possible that ballooning has in fact failed due to
memory pressure in the host and therefore it is desirable to keep
attempting to reach the target in case memory becomes available. The
most likely scenario is that some guests are ballooning down while
others are ballooning up and therefore there is temporary memory
pressure while things stabilise. You would not expect a well behaved
toolstack to ask a domain to balloon to more than its allocation nor
would you expect it to deliberately over-commit memory by setting
balloon targets which exceed the total host memory.

This patch drops the concept of a hard limit and causes the balloon
driver to retry increasing the reservation on a timer in the same
manner as when decreasing the reservation.

Also if we partially succeed in increasing the reservation
(i.e. receive less pages than we asked for) then we may as well keep
those pages rather than returning them to Xen.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jun 05 14:01:20 2009 +0100 (2009-06-05)
parents 831230e53067
children
line source
1 /* depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
3 Written 1994, 1995 by David C. Davies.
6 Copyright 1994 David C. Davies
7 and
8 United States Government
9 (as represented by the Director, National Security Agency).
11 Copyright 1995 Digital Equipment Corporation.
14 This software may be used and distributed according to the terms of
15 the GNU General Public License, incorporated herein by reference.
17 This driver is written for the Digital Equipment Corporation series
18 of DEPCA and EtherWORKS ethernet cards:
20 DEPCA (the original)
21 DE100
22 DE101
23 DE200 Turbo
24 DE201 Turbo
25 DE202 Turbo (TP BNC)
26 DE210
27 DE422 (EISA)
29 The driver has been tested on DE100, DE200 and DE202 cards in a
30 relatively busy network. The DE422 has been tested a little.
32 This driver will NOT work for the DE203, DE204 and DE205 series of
33 cards, since they have a new custom ASIC in place of the AMD LANCE
34 chip. See the 'ewrk3.c' driver in the Linux source tree for running
35 those cards.
37 I have benchmarked the driver with a DE100 at 595kB/s to (542kB/s from)
38 a DECstation 5000/200.
40 The author may be reached at davies@maniac.ultranet.com
42 =========================================================================
44 The driver was originally based on the 'lance.c' driver from Donald
45 Becker which is included with the standard driver distribution for
46 linux. V0.4 is a complete re-write with only the kernel interface
47 remaining from the original code.
49 1) Lance.c code in /linux/drivers/net/
50 2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
51 AMD, 1992 [(800) 222-9323].
52 3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
53 AMD, Pub. #17881, May 1993.
54 4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
55 AMD, Pub. #16907, May 1992
56 5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
57 Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
58 6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
59 Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
60 7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
61 Digital Equipment Corporation, 1989
62 8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
63 Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
66 Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
67 driver.
69 The original DEPCA card requires that the ethernet ROM address counter
70 be enabled to count and has an 8 bit NICSR. The ROM counter enabling is
71 only done when a 0x08 is read as the first address octet (to minimise
72 the chances of writing over some other hardware's I/O register). The
73 NICSR accesses have been changed to byte accesses for all the cards
74 supported by this driver, since there is only one useful bit in the MSB
75 (remote boot timeout) and it is not used. Also, there is a maximum of
76 only 48kB network RAM for this card. My thanks to Torbjorn Lindh for
77 help debugging all this (and holding my feet to the fire until I got it
78 right).
80 The DE200 series boards have on-board 64kB RAM for use as a shared
81 memory network buffer. Only the DE100 cards make use of a 2kB buffer
82 mode which has not been implemented in this driver (only the 32kB and
83 64kB modes are supported [16kB/48kB for the original DEPCA]).
85 At the most only 2 DEPCA cards can be supported on the ISA bus because
86 there is only provision for two I/O base addresses on each card (0x300
87 and 0x200). The I/O address is detected by searching for a byte sequence
88 in the Ethernet station address PROM at the expected I/O address for the
89 Ethernet PROM. The shared memory base address is 'autoprobed' by
90 looking for the self test PROM and detecting the card name. When a
91 second DEPCA is detected, information is placed in the base_addr
92 variable of the next device structure (which is created if necessary),
93 thus enabling ethif_probe initialization for the device. More than 2
94 EISA cards can be supported, but care will be needed assigning the
95 shared memory to ensure that each slot has the correct IRQ, I/O address
96 and shared memory address assigned.
98 ************************************************************************
100 NOTE: If you are using two ISA DEPCAs, it is important that you assign
101 the base memory addresses correctly. The driver autoprobes I/O 0x300
102 then 0x200. The base memory address for the first device must be less
103 than that of the second so that the auto probe will correctly assign the
104 I/O and memory addresses on the same card. I can't think of a way to do
105 this unambiguously at the moment, since there is nothing on the cards to
106 tie I/O and memory information together.
108 I am unable to test 2 cards together for now, so this code is
109 unchecked. All reports, good or bad, are welcome.
111 ************************************************************************
113 The board IRQ setting must be at an unused IRQ which is auto-probed
114 using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
115 {2,3,4,5,7}, whereas the DE200 is at {5,9,10,11,15}. Note that IRQ2 is
116 really IRQ9 in machines with 16 IRQ lines.
118 No 16MB memory limitation should exist with this driver as DMA is not
119 used and the common memory area is in low memory on the network card (my
120 current system has 20MB and I've not had problems yet).
122 The ability to load this driver as a loadable module has been added. To
123 utilise this ability, you have to do <8 things:
125 0) have a copy of the loadable modules code installed on your system.
126 1) copy depca.c from the /linux/drivers/net directory to your favourite
127 temporary directory.
128 2) if you wish, edit the source code near line 1530 to reflect the I/O
129 address and IRQ you're using (see also 5).
130 3) compile depca.c, but include -DMODULE in the command line to ensure
131 that the correct bits are compiled (see end of source code).
132 4) if you are wanting to add a new card, goto 5. Otherwise, recompile a
133 kernel with the depca configuration turned off and reboot.
134 5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
135 [Alan Cox: Changed the code to allow command line irq/io assignments]
136 [Dave Davies: Changed the code to allow command line mem/name
137 assignments]
138 6) run the net startup bits for your eth?? interface manually
139 (usually /etc/rc.inet[12] at boot time).
140 7) enjoy!
142 Note that autoprobing is not allowed in loadable modules - the system is
143 already up and running and you're messing with interrupts.
145 To unload a module, turn off the associated interface
146 'ifconfig eth?? down' then 'rmmod depca'.
148 To assign a base memory address for the shared memory when running as a
149 loadable module, see 5 above. To include the adapter name (if you have
150 no PROM but know the card name) also see 5 above. Note that this last
151 option will not work with kernel built-in depca's.
153 The shared memory assignment for a loadable module makes sense to avoid
154 the 'memory autoprobe' picking the wrong shared memory (for the case of
155 2 depca's in a PC).
157 ************************************************************************
158 Support for MCA EtherWORKS cards added 11-3-98.
159 Verified to work with up to 2 DE212 cards in a system (although not
160 fully stress-tested).
162 Currently known bugs/limitations:
164 Note: with the MCA stuff as a module, it trusts the MCA configuration,
165 not the command line for IRQ and memory address. You can
166 specify them if you want, but it will throw your values out.
167 You still have to pass the IO address it was configured as
168 though.
170 ************************************************************************
171 TO DO:
172 ------
175 Revision History
176 ----------------
178 Version Date Description
180 0.1 25-jan-94 Initial writing.
181 0.2 27-jan-94 Added LANCE TX hardware buffer chaining.
182 0.3 1-feb-94 Added multiple DEPCA support.
183 0.31 4-feb-94 Added DE202 recognition.
184 0.32 19-feb-94 Tidy up. Improve multi-DEPCA support.
185 0.33 25-feb-94 Fix DEPCA ethernet ROM counter enable.
186 Add jabber packet fix from murf@perftech.com
187 and becker@super.org
188 0.34 7-mar-94 Fix DEPCA max network memory RAM & NICSR access.
189 0.35 8-mar-94 Added DE201 recognition. Tidied up.
190 0.351 30-apr-94 Added EISA support. Added DE422 recognition.
191 0.36 16-may-94 DE422 fix released.
192 0.37 22-jul-94 Added MODULE support
193 0.38 15-aug-94 Added DBR ROM switch in depca_close().
194 Multi DEPCA bug fix.
195 0.38axp 15-sep-94 Special version for Alpha AXP Linux V1.0.
196 0.381 12-dec-94 Added DE101 recognition, fix multicast bug.
197 0.382 9-feb-95 Fix recognition bug reported by <bkm@star.rl.ac.uk>.
198 0.383 22-feb-95 Fix for conflict with VESA SCSI reported by
199 <stromain@alf.dec.com>
200 0.384 17-mar-95 Fix a ring full bug reported by <bkm@star.rl.ac.uk>
201 0.385 3-apr-95 Fix a recognition bug reported by
202 <ryan.niemi@lastfrontier.com>
203 0.386 21-apr-95 Fix the last fix...sorry, must be galloping senility
204 0.40 25-May-95 Rewrite for portability & updated.
205 ALPHA support from <jestabro@amt.tay1.dec.com>
206 0.41 26-Jun-95 Added verify_area() calls in depca_ioctl() from
207 suggestion by <heiko@colossus.escape.de>
208 0.42 27-Dec-95 Add 'mem' shared memory assignment for loadable
209 modules.
210 Add 'adapter_name' for loadable modules when no PROM.
211 Both above from a suggestion by
212 <pchen@woodruffs121.residence.gatech.edu>.
213 Add new multicasting code.
214 0.421 22-Apr-96 Fix alloc_device() bug <jari@markkus2.fimr.fi>
215 0.422 29-Apr-96 Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
216 0.423 7-Jun-96 Fix module load bug <kmg@barco.be>
217 0.43 16-Aug-96 Update alloc_device() to conform to de4x5.c
218 0.44 1-Sep-97 Fix *_probe() to test check_region() first - bug
219 reported by <mmogilvi@elbert.uccs.edu>
220 0.45 3-Nov-98 Added support for MCA EtherWORKS (DE210/DE212) cards
221 by <tymm@computer.org>
222 0.451 5-Nov-98 Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
223 0.5 14-Nov-98 Re-spin for 2.1.x kernels.
224 0.51 27-Jun-99 Correct received packet length for CRC from
225 report by <worm@dkik.dk>
226 0.52 16-Oct-00 Fixes for 2.3 io memory accesses
227 Fix show-stopper (ints left masked) in depca_interrupt
228 by <peterd@pnd-pc.demon.co.uk>
229 0.53 12-Jan-01 Release resources on failure, bss tidbits
230 by acme@conectiva.com.br
231 0.54 08-Nov-01 use library crc32 functions
232 by Matt_Domsch@dell.com
233 0.55 01-Mar-03 Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
235 =========================================================================
236 */
238 #include <linux/module.h>
239 #include <linux/kernel.h>
240 #include <linux/string.h>
241 #include <linux/errno.h>
242 #include <linux/ioport.h>
243 #include <linux/slab.h>
244 #include <linux/interrupt.h>
245 #include <linux/delay.h>
246 #include <linux/init.h>
247 #include <linux/crc32.h>
248 #include <linux/netdevice.h>
249 #include <linux/etherdevice.h>
250 #include <linux/skbuff.h>
251 #include <linux/time.h>
252 #include <linux/types.h>
253 #include <linux/unistd.h>
254 #include <linux/ctype.h>
255 #include <linux/moduleparam.h>
256 #include <linux/platform_device.h>
257 #include <linux/bitops.h>
259 #include <asm/uaccess.h>
260 #include <asm/io.h>
261 #include <asm/dma.h>
263 #ifdef CONFIG_MCA
264 #include <linux/mca.h>
265 #endif
267 #ifdef CONFIG_EISA
268 #include <linux/eisa.h>
269 #endif
271 #include "depca.h"
273 static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
275 #ifdef DEPCA_DEBUG
276 static int depca_debug = DEPCA_DEBUG;
277 #else
278 static int depca_debug = 1;
279 #endif
281 #define DEPCA_NDA 0xffe0 /* No Device Address */
283 #define TX_TIMEOUT (1*HZ)
285 /*
286 ** Ethernet PROM defines
287 */
288 #define PROBE_LENGTH 32
289 #define ETH_PROM_SIG 0xAA5500FFUL
291 /*
292 ** Set the number of Tx and Rx buffers. Ensure that the memory requested
293 ** here is <= to the amount of shared memory set up by the board switches.
294 ** The number of descriptors MUST BE A POWER OF 2.
295 **
296 ** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
297 */
298 #define NUM_RX_DESC 8 /* Number of RX descriptors */
299 #define NUM_TX_DESC 8 /* Number of TX descriptors */
300 #define RX_BUFF_SZ 1536 /* Buffer size for each Rx buffer */
301 #define TX_BUFF_SZ 1536 /* Buffer size for each Tx buffer */
303 /*
304 ** EISA bus defines
305 */
306 #define DEPCA_EISA_IO_PORTS 0x0c00 /* I/O port base address, slot 0 */
308 /*
309 ** ISA Bus defines
310 */
311 #define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
312 #define DEPCA_TOTAL_SIZE 0x10
314 static struct {
315 u_long iobase;
316 struct platform_device *device;
317 } depca_io_ports[] = {
318 { 0x300, NULL },
319 { 0x200, NULL },
320 { 0 , NULL },
321 };
323 /*
324 ** Name <-> Adapter mapping
325 */
326 #define DEPCA_SIGNATURE {"DEPCA",\
327 "DE100","DE101",\
328 "DE200","DE201","DE202",\
329 "DE210","DE212",\
330 "DE422",\
331 ""}
333 static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
335 enum depca_type {
336 DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
337 };
339 static char depca_string[] = "depca";
341 static int depca_device_remove (struct device *device);
343 #ifdef CONFIG_EISA
344 static struct eisa_device_id depca_eisa_ids[] = {
345 { "DEC4220", de422 },
346 { "" }
347 };
348 MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
350 static int depca_eisa_probe (struct device *device);
352 static struct eisa_driver depca_eisa_driver = {
353 .id_table = depca_eisa_ids,
354 .driver = {
355 .name = depca_string,
356 .probe = depca_eisa_probe,
357 .remove = __devexit_p (depca_device_remove)
358 }
359 };
360 #endif
362 #ifdef CONFIG_MCA
363 /*
364 ** Adapter ID for the MCA EtherWORKS DE210/212 adapter
365 */
366 #define DE210_ID 0x628d
367 #define DE212_ID 0x6def
369 static short depca_mca_adapter_ids[] = {
370 DE210_ID,
371 DE212_ID,
372 0x0000
373 };
375 static char *depca_mca_adapter_name[] = {
376 "DEC EtherWORKS MC Adapter (DE210)",
377 "DEC EtherWORKS MC Adapter (DE212)",
378 NULL
379 };
381 static enum depca_type depca_mca_adapter_type[] = {
382 de210,
383 de212,
384 0
385 };
387 static int depca_mca_probe (struct device *);
389 static struct mca_driver depca_mca_driver = {
390 .id_table = depca_mca_adapter_ids,
391 .driver = {
392 .name = depca_string,
393 .bus = &mca_bus_type,
394 .probe = depca_mca_probe,
395 .remove = __devexit_p(depca_device_remove),
396 },
397 };
398 #endif
400 static int depca_isa_probe (struct platform_device *);
402 static int __devexit depca_isa_remove(struct platform_device *pdev)
403 {
404 return depca_device_remove(&pdev->dev);
405 }
407 static struct platform_driver depca_isa_driver = {
408 .probe = depca_isa_probe,
409 .remove = __devexit_p(depca_isa_remove),
410 .driver = {
411 .name = depca_string,
412 },
413 };
415 /*
416 ** Miscellaneous info...
417 */
418 #define DEPCA_STRLEN 16
420 /*
421 ** Memory Alignment. Each descriptor is 4 longwords long. To force a
422 ** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
423 ** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
424 ** and hence the RX descriptor ring's first entry.
425 */
426 #define DEPCA_ALIGN4 ((u_long)4 - 1) /* 1 longword align */
427 #define DEPCA_ALIGN8 ((u_long)8 - 1) /* 2 longword (quadword) align */
428 #define DEPCA_ALIGN DEPCA_ALIGN8 /* Keep the LANCE happy... */
430 /*
431 ** The DEPCA Rx and Tx ring descriptors.
432 */
433 struct depca_rx_desc {
434 volatile s32 base;
435 s16 buf_length; /* This length is negative 2's complement! */
436 s16 msg_length; /* This length is "normal". */
437 };
439 struct depca_tx_desc {
440 volatile s32 base;
441 s16 length; /* This length is negative 2's complement! */
442 s16 misc; /* Errors and TDR info */
443 };
445 #define LA_MASK 0x0000ffff /* LANCE address mask for mapping network RAM
446 to LANCE memory address space */
448 /*
449 ** The Lance initialization block, described in databook, in common memory.
450 */
451 struct depca_init {
452 u16 mode; /* Mode register */
453 u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
454 u8 mcast_table[8]; /* Multicast Hash Table. */
455 u32 rx_ring; /* Rx ring base pointer & ring length */
456 u32 tx_ring; /* Tx ring base pointer & ring length */
457 };
459 #define DEPCA_PKT_STAT_SZ 16
460 #define DEPCA_PKT_BIN_SZ 128 /* Should be >=100 unless you
461 increase DEPCA_PKT_STAT_SZ */
462 struct depca_private {
463 char adapter_name[DEPCA_STRLEN]; /* /proc/ioports string */
464 enum depca_type adapter; /* Adapter type */
465 enum {
466 DEPCA_BUS_MCA = 1,
467 DEPCA_BUS_ISA,
468 DEPCA_BUS_EISA,
469 } depca_bus; /* type of bus */
470 struct depca_init init_block; /* Shadow Initialization block */
471 /* CPU address space fields */
472 struct depca_rx_desc __iomem *rx_ring; /* Pointer to start of RX descriptor ring */
473 struct depca_tx_desc __iomem *tx_ring; /* Pointer to start of TX descriptor ring */
474 void __iomem *rx_buff[NUM_RX_DESC]; /* CPU virt address of sh'd memory buffs */
475 void __iomem *tx_buff[NUM_TX_DESC]; /* CPU virt address of sh'd memory buffs */
476 void __iomem *sh_mem; /* CPU mapped virt address of device RAM */
477 u_long mem_start; /* Bus address of device RAM (before remap) */
478 u_long mem_len; /* device memory size */
479 /* Device address space fields */
480 u_long device_ram_start; /* Start of RAM in device addr space */
481 /* Offsets used in both address spaces */
482 u_long rx_ring_offset; /* Offset from start of RAM to rx_ring */
483 u_long tx_ring_offset; /* Offset from start of RAM to tx_ring */
484 u_long buffs_offset; /* LANCE Rx and Tx buffers start address. */
485 /* Kernel-only (not device) fields */
486 int rx_new, tx_new; /* The next free ring entry */
487 int rx_old, tx_old; /* The ring entries to be free()ed. */
488 struct net_device_stats stats;
489 spinlock_t lock;
490 struct { /* Private stats counters */
491 u32 bins[DEPCA_PKT_STAT_SZ];
492 u32 unicast;
493 u32 multicast;
494 u32 broadcast;
495 u32 excessive_collisions;
496 u32 tx_underruns;
497 u32 excessive_underruns;
498 } pktStats;
499 int txRingMask; /* TX ring mask */
500 int rxRingMask; /* RX ring mask */
501 s32 rx_rlen; /* log2(rxRingMask+1) for the descriptors */
502 s32 tx_rlen; /* log2(txRingMask+1) for the descriptors */
503 };
505 /*
506 ** The transmit ring full condition is described by the tx_old and tx_new
507 ** pointers by:
508 ** tx_old = tx_new Empty ring
509 ** tx_old = tx_new+1 Full ring
510 ** tx_old+txRingMask = tx_new Full ring (wrapped condition)
511 */
512 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
513 lp->tx_old+lp->txRingMask-lp->tx_new:\
514 lp->tx_old -lp->tx_new-1)
516 /*
517 ** Public Functions
518 */
519 static int depca_open(struct net_device *dev);
520 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
521 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs);
522 static int depca_close(struct net_device *dev);
523 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524 static void depca_tx_timeout(struct net_device *dev);
525 static struct net_device_stats *depca_get_stats(struct net_device *dev);
526 static void set_multicast_list(struct net_device *dev);
528 /*
529 ** Private functions
530 */
531 static void depca_init_ring(struct net_device *dev);
532 static int depca_rx(struct net_device *dev);
533 static int depca_tx(struct net_device *dev);
535 static void LoadCSRs(struct net_device *dev);
536 static int InitRestartDepca(struct net_device *dev);
537 static int DepcaSignature(char *name, u_long paddr);
538 static int DevicePresent(u_long ioaddr);
539 static int get_hw_addr(struct net_device *dev);
540 static void SetMulticastFilter(struct net_device *dev);
541 static int load_packet(struct net_device *dev, struct sk_buff *skb);
542 static void depca_dbg_open(struct net_device *dev);
544 static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
545 static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
546 static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
547 static u_char *depca_irq;
549 static int irq;
550 static int io;
551 static char *adapter_name;
552 static int mem; /* For loadable module assignment
553 use insmod mem=0x????? .... */
554 module_param (irq, int, 0);
555 module_param (io, int, 0);
556 module_param (adapter_name, charp, 0);
557 module_param (mem, int, 0);
558 MODULE_PARM_DESC(irq, "DEPCA IRQ number");
559 MODULE_PARM_DESC(io, "DEPCA I/O base address");
560 MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
561 MODULE_PARM_DESC(mem, "DEPCA shared memory address");
562 MODULE_LICENSE("GPL");
564 /*
565 ** Miscellaneous defines...
566 */
567 #define STOP_DEPCA \
568 outw(CSR0, DEPCA_ADDR);\
569 outw(STOP, DEPCA_DATA)
571 static int __init depca_hw_init (struct net_device *dev, struct device *device)
572 {
573 struct depca_private *lp;
574 int i, j, offset, netRAM, mem_len, status = 0;
575 s16 nicsr;
576 u_long ioaddr;
577 u_long mem_start;
579 /*
580 * We are now supposed to enter this function with the
581 * following fields filled with proper values :
582 *
583 * dev->base_addr
584 * lp->mem_start
585 * lp->depca_bus
586 * lp->adapter
587 *
588 * dev->irq can be set if known from device configuration (on
589 * MCA or EISA) or module option. Otherwise, it will be auto
590 * detected.
591 */
593 ioaddr = dev->base_addr;
595 STOP_DEPCA;
597 nicsr = inb(DEPCA_NICSR);
598 nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
599 outb(nicsr, DEPCA_NICSR);
601 if (inw(DEPCA_DATA) != STOP) {
602 return -ENXIO;
603 }
605 lp = (struct depca_private *) dev->priv;
606 mem_start = lp->mem_start;
608 if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
609 return -ENXIO;
611 printk ("%s: %s at 0x%04lx",
612 device->bus_id, depca_signature[lp->adapter], ioaddr);
614 switch (lp->depca_bus) {
615 #ifdef CONFIG_MCA
616 case DEPCA_BUS_MCA:
617 printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
618 break;
619 #endif
621 #ifdef CONFIG_EISA
622 case DEPCA_BUS_EISA:
623 printk(" (EISA slot %d)", to_eisa_device(device)->slot);
624 break;
625 #endif
627 case DEPCA_BUS_ISA:
628 break;
630 default:
631 printk("Unknown DEPCA bus %d\n", lp->depca_bus);
632 return -ENXIO;
633 }
635 printk(", h/w address ");
636 status = get_hw_addr(dev);
637 if (status != 0) {
638 printk(" which has an Ethernet PROM CRC error.\n");
639 return -ENXIO;
640 }
641 for (i = 0; i < ETH_ALEN - 1; i++) { /* get the ethernet address */
642 printk("%2.2x:", dev->dev_addr[i]);
643 }
644 printk("%2.2x", dev->dev_addr[i]);
646 /* Set up the maximum amount of network RAM(kB) */
647 netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
648 if ((nicsr & _128KB) && (lp->adapter == de422))
649 netRAM = 128;
651 /* Shared Memory Base Address */
652 if (nicsr & BUF) {
653 nicsr &= ~BS; /* DEPCA RAM in top 32k */
654 netRAM -= 32;
656 /* Only EISA/ISA needs start address to be re-computed */
657 if (lp->depca_bus != DEPCA_BUS_MCA)
658 mem_start += 0x8000;
659 }
661 if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
662 > (netRAM << 10)) {
663 printk(",\n requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
664 return -ENXIO;
665 }
667 printk(",\n has %dkB RAM at 0x%.5lx", netRAM, mem_start);
669 /* Enable the shadow RAM. */
670 if (lp->adapter != DEPCA) {
671 nicsr |= SHE;
672 outb(nicsr, DEPCA_NICSR);
673 }
675 spin_lock_init(&lp->lock);
676 sprintf(lp->adapter_name, "%s (%s)",
677 depca_signature[lp->adapter], device->bus_id);
678 status = -EBUSY;
680 /* Initialisation Block */
681 if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
682 printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
683 goto out_priv;
684 }
686 status = -EIO;
687 lp->sh_mem = ioremap(mem_start, mem_len);
688 if (lp->sh_mem == NULL) {
689 printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
690 goto out1;
691 }
693 lp->mem_start = mem_start;
694 lp->mem_len = mem_len;
695 lp->device_ram_start = mem_start & LA_MASK;
697 offset = 0;
698 offset += sizeof(struct depca_init);
700 /* Tx & Rx descriptors (aligned to a quadword boundary) */
701 offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
702 lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
703 lp->rx_ring_offset = offset;
705 offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
706 lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
707 lp->tx_ring_offset = offset;
709 offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
711 lp->buffs_offset = offset;
713 /* Finish initialising the ring information. */
714 lp->rxRingMask = NUM_RX_DESC - 1;
715 lp->txRingMask = NUM_TX_DESC - 1;
717 /* Calculate Tx/Rx RLEN size for the descriptors. */
718 for (i = 0, j = lp->rxRingMask; j > 0; i++) {
719 j >>= 1;
720 }
721 lp->rx_rlen = (s32) (i << 29);
722 for (i = 0, j = lp->txRingMask; j > 0; i++) {
723 j >>= 1;
724 }
725 lp->tx_rlen = (s32) (i << 29);
727 /* Load the initialisation block */
728 depca_init_ring(dev);
730 /* Initialise the control and status registers */
731 LoadCSRs(dev);
733 /* Enable DEPCA board interrupts for autoprobing */
734 nicsr = ((nicsr & ~IM) | IEN);
735 outb(nicsr, DEPCA_NICSR);
737 /* To auto-IRQ we enable the initialization-done and DMA err,
738 interrupts. For now we will always get a DMA error. */
739 if (dev->irq < 2) {
740 unsigned char irqnum;
741 unsigned long irq_mask, delay;
743 irq_mask = probe_irq_on();
745 /* Assign the correct irq list */
746 switch (lp->adapter) {
747 case DEPCA:
748 case de100:
749 case de101:
750 depca_irq = de1xx_irq;
751 break;
752 case de200:
753 case de201:
754 case de202:
755 case de210:
756 case de212:
757 depca_irq = de2xx_irq;
758 break;
759 case de422:
760 depca_irq = de422_irq;
761 break;
763 default:
764 break; /* Not reached */
765 }
767 /* Trigger an initialization just for the interrupt. */
768 outw(INEA | INIT, DEPCA_DATA);
770 delay = jiffies + HZ/50;
771 while (time_before(jiffies, delay))
772 yield();
774 irqnum = probe_irq_off(irq_mask);
776 status = -ENXIO;
777 if (!irqnum) {
778 printk(" and failed to detect IRQ line.\n");
779 goto out2;
780 } else {
781 for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
782 if (irqnum == depca_irq[i]) {
783 dev->irq = irqnum;
784 printk(" and uses IRQ%d.\n", dev->irq);
785 }
787 if (!dev->irq) {
788 printk(" but incorrect IRQ line detected.\n");
789 goto out2;
790 }
791 }
792 } else {
793 printk(" and assigned IRQ%d.\n", dev->irq);
794 }
796 if (depca_debug > 1) {
797 printk(version);
798 }
800 /* The DEPCA-specific entries in the device structure. */
801 dev->open = &depca_open;
802 dev->hard_start_xmit = &depca_start_xmit;
803 dev->stop = &depca_close;
804 dev->get_stats = &depca_get_stats;
805 dev->set_multicast_list = &set_multicast_list;
806 dev->do_ioctl = &depca_ioctl;
807 dev->tx_timeout = depca_tx_timeout;
808 dev->watchdog_timeo = TX_TIMEOUT;
810 dev->mem_start = 0;
812 device->driver_data = dev;
813 SET_NETDEV_DEV (dev, device);
815 status = register_netdev(dev);
816 if (status == 0)
817 return 0;
818 out2:
819 iounmap(lp->sh_mem);
820 out1:
821 release_mem_region (mem_start, mem_len);
822 out_priv:
823 return status;
824 }
827 static int depca_open(struct net_device *dev)
828 {
829 struct depca_private *lp = (struct depca_private *) dev->priv;
830 u_long ioaddr = dev->base_addr;
831 s16 nicsr;
832 int status = 0;
834 STOP_DEPCA;
835 nicsr = inb(DEPCA_NICSR);
837 /* Make sure the shadow RAM is enabled */
838 if (lp->adapter != DEPCA) {
839 nicsr |= SHE;
840 outb(nicsr, DEPCA_NICSR);
841 }
843 /* Re-initialize the DEPCA... */
844 depca_init_ring(dev);
845 LoadCSRs(dev);
847 depca_dbg_open(dev);
849 if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
850 printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
851 status = -EAGAIN;
852 } else {
854 /* Enable DEPCA board interrupts and turn off LED */
855 nicsr = ((nicsr & ~IM & ~LED) | IEN);
856 outb(nicsr, DEPCA_NICSR);
857 outw(CSR0, DEPCA_ADDR);
859 netif_start_queue(dev);
861 status = InitRestartDepca(dev);
863 if (depca_debug > 1) {
864 printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
865 printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
866 }
867 }
868 return status;
869 }
871 /* Initialize the lance Rx and Tx descriptor rings. */
872 static void depca_init_ring(struct net_device *dev)
873 {
874 struct depca_private *lp = (struct depca_private *) dev->priv;
875 u_int i;
876 u_long offset;
878 /* Lock out other processes whilst setting up the hardware */
879 netif_stop_queue(dev);
881 lp->rx_new = lp->tx_new = 0;
882 lp->rx_old = lp->tx_old = 0;
884 /* Initialize the base address and length of each buffer in the ring */
885 for (i = 0; i <= lp->rxRingMask; i++) {
886 offset = lp->buffs_offset + i * RX_BUFF_SZ;
887 writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
888 writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
889 lp->rx_buff[i] = lp->sh_mem + offset;
890 }
892 for (i = 0; i <= lp->txRingMask; i++) {
893 offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
894 writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
895 lp->tx_buff[i] = lp->sh_mem + offset;
896 }
898 /* Set up the initialization block */
899 lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
900 lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
902 SetMulticastFilter(dev);
904 for (i = 0; i < ETH_ALEN; i++) {
905 lp->init_block.phys_addr[i] = dev->dev_addr[i];
906 }
908 lp->init_block.mode = 0x0000; /* Enable the Tx and Rx */
909 }
912 static void depca_tx_timeout(struct net_device *dev)
913 {
914 u_long ioaddr = dev->base_addr;
916 printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
918 STOP_DEPCA;
919 depca_init_ring(dev);
920 LoadCSRs(dev);
921 dev->trans_start = jiffies;
922 netif_wake_queue(dev);
923 InitRestartDepca(dev);
924 }
927 /*
928 ** Writes a socket buffer to TX descriptor ring and starts transmission
929 */
930 static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
931 {
932 struct depca_private *lp = (struct depca_private *) dev->priv;
933 u_long ioaddr = dev->base_addr;
934 int status = 0;
936 /* Transmitter timeout, serious problems. */
937 if (skb->len < 1)
938 goto out;
940 if (skb_padto(skb, ETH_ZLEN))
941 goto out;
943 netif_stop_queue(dev);
945 if (TX_BUFFS_AVAIL) { /* Fill in a Tx ring entry */
946 status = load_packet(dev, skb);
948 if (!status) {
949 /* Trigger an immediate send demand. */
950 outw(CSR0, DEPCA_ADDR);
951 outw(INEA | TDMD, DEPCA_DATA);
953 dev->trans_start = jiffies;
954 dev_kfree_skb(skb);
955 }
956 if (TX_BUFFS_AVAIL)
957 netif_start_queue(dev);
958 } else
959 status = -1;
961 out:
962 return status;
963 }
965 /*
966 ** The DEPCA interrupt handler.
967 */
968 static irqreturn_t depca_interrupt(int irq, void *dev_id, struct pt_regs *regs)
969 {
970 struct net_device *dev = dev_id;
971 struct depca_private *lp;
972 s16 csr0, nicsr;
973 u_long ioaddr;
975 if (dev == NULL) {
976 printk("depca_interrupt(): irq %d for unknown device.\n", irq);
977 return IRQ_NONE;
978 }
980 lp = (struct depca_private *) dev->priv;
981 ioaddr = dev->base_addr;
983 spin_lock(&lp->lock);
985 /* mask the DEPCA board interrupts and turn on the LED */
986 nicsr = inb(DEPCA_NICSR);
987 nicsr |= (IM | LED);
988 outb(nicsr, DEPCA_NICSR);
990 outw(CSR0, DEPCA_ADDR);
991 csr0 = inw(DEPCA_DATA);
993 /* Acknowledge all of the current interrupt sources ASAP. */
994 outw(csr0 & INTE, DEPCA_DATA);
996 if (csr0 & RINT) /* Rx interrupt (packet arrived) */
997 depca_rx(dev);
999 if (csr0 & TINT) /* Tx interrupt (packet sent) */
1000 depca_tx(dev);
1002 /* Any resources available? */
1003 if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
1004 netif_wake_queue(dev);
1007 /* Unmask the DEPCA board interrupts and turn off the LED */
1008 nicsr = (nicsr & ~IM & ~LED);
1009 outb(nicsr, DEPCA_NICSR);
1011 spin_unlock(&lp->lock);
1012 return IRQ_HANDLED;
1015 /* Called with lp->lock held */
1016 static int depca_rx(struct net_device *dev)
1018 struct depca_private *lp = (struct depca_private *) dev->priv;
1019 int i, entry;
1020 s32 status;
1022 for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1023 status = readl(&lp->rx_ring[entry].base) >> 16;
1024 if (status & R_STP) { /* Remember start of frame */
1025 lp->rx_old = entry;
1027 if (status & R_ENP) { /* Valid frame status */
1028 if (status & R_ERR) { /* There was an error. */
1029 lp->stats.rx_errors++; /* Update the error stats. */
1030 if (status & R_FRAM)
1031 lp->stats.rx_frame_errors++;
1032 if (status & R_OFLO)
1033 lp->stats.rx_over_errors++;
1034 if (status & R_CRC)
1035 lp->stats.rx_crc_errors++;
1036 if (status & R_BUFF)
1037 lp->stats.rx_fifo_errors++;
1038 } else {
1039 short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1040 struct sk_buff *skb;
1042 skb = dev_alloc_skb(pkt_len + 2);
1043 if (skb != NULL) {
1044 unsigned char *buf;
1045 skb_reserve(skb, 2); /* 16 byte align the IP header */
1046 buf = skb_put(skb, pkt_len);
1047 skb->dev = dev;
1048 if (entry < lp->rx_old) { /* Wrapped buffer */
1049 len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1050 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1051 memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1052 } else { /* Linear buffer */
1053 memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1056 /*
1057 ** Notify the upper protocol layers that there is another
1058 ** packet to handle
1059 */
1060 skb->protocol = eth_type_trans(skb, dev);
1061 netif_rx(skb);
1063 /*
1064 ** Update stats
1065 */
1066 dev->last_rx = jiffies;
1067 lp->stats.rx_packets++;
1068 lp->stats.rx_bytes += pkt_len;
1069 for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1070 if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1071 lp->pktStats.bins[i]++;
1072 i = DEPCA_PKT_STAT_SZ;
1075 if (buf[0] & 0x01) { /* Multicast/Broadcast */
1076 if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1077 lp->pktStats.broadcast++;
1078 } else {
1079 lp->pktStats.multicast++;
1081 } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1082 lp->pktStats.unicast++;
1085 lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1086 if (lp->pktStats.bins[0] == 0) { /* Reset counters */
1087 memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1089 } else {
1090 printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1091 lp->stats.rx_dropped++; /* Really, deferred. */
1092 break;
1095 /* Change buffer ownership for this last frame, back to the adapter */
1096 for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1097 writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1099 writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1102 /*
1103 ** Update entry information
1104 */
1105 lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1108 return 0;
1111 /*
1112 ** Buffer sent - check for buffer errors.
1113 ** Called with lp->lock held
1114 */
1115 static int depca_tx(struct net_device *dev)
1117 struct depca_private *lp = (struct depca_private *) dev->priv;
1118 int entry;
1119 s32 status;
1120 u_long ioaddr = dev->base_addr;
1122 for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1123 status = readl(&lp->tx_ring[entry].base) >> 16;
1125 if (status < 0) { /* Packet not yet sent! */
1126 break;
1127 } else if (status & T_ERR) { /* An error occurred. */
1128 status = readl(&lp->tx_ring[entry].misc);
1129 lp->stats.tx_errors++;
1130 if (status & TMD3_RTRY)
1131 lp->stats.tx_aborted_errors++;
1132 if (status & TMD3_LCAR)
1133 lp->stats.tx_carrier_errors++;
1134 if (status & TMD3_LCOL)
1135 lp->stats.tx_window_errors++;
1136 if (status & TMD3_UFLO)
1137 lp->stats.tx_fifo_errors++;
1138 if (status & (TMD3_BUFF | TMD3_UFLO)) {
1139 /* Trigger an immediate send demand. */
1140 outw(CSR0, DEPCA_ADDR);
1141 outw(INEA | TDMD, DEPCA_DATA);
1143 } else if (status & (T_MORE | T_ONE)) {
1144 lp->stats.collisions++;
1145 } else {
1146 lp->stats.tx_packets++;
1149 /* Update all the pointers */
1150 lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1153 return 0;
1156 static int depca_close(struct net_device *dev)
1158 struct depca_private *lp = (struct depca_private *) dev->priv;
1159 s16 nicsr;
1160 u_long ioaddr = dev->base_addr;
1162 netif_stop_queue(dev);
1164 outw(CSR0, DEPCA_ADDR);
1166 if (depca_debug > 1) {
1167 printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1170 /*
1171 ** We stop the DEPCA here -- it occasionally polls
1172 ** memory if we don't.
1173 */
1174 outw(STOP, DEPCA_DATA);
1176 /*
1177 ** Give back the ROM in case the user wants to go to DOS
1178 */
1179 if (lp->adapter != DEPCA) {
1180 nicsr = inb(DEPCA_NICSR);
1181 nicsr &= ~SHE;
1182 outb(nicsr, DEPCA_NICSR);
1185 /*
1186 ** Free the associated irq
1187 */
1188 free_irq(dev->irq, dev);
1189 return 0;
1192 static void LoadCSRs(struct net_device *dev)
1194 struct depca_private *lp = (struct depca_private *) dev->priv;
1195 u_long ioaddr = dev->base_addr;
1197 outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1198 outw((u16) lp->device_ram_start, DEPCA_DATA);
1199 outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1200 outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1201 outw(CSR3, DEPCA_ADDR); /* ALE control */
1202 outw(ACON, DEPCA_DATA);
1204 outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1206 return;
1209 static int InitRestartDepca(struct net_device *dev)
1211 struct depca_private *lp = (struct depca_private *) dev->priv;
1212 u_long ioaddr = dev->base_addr;
1213 int i, status = 0;
1215 /* Copy the shadow init_block to shared memory */
1216 memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1218 outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1219 outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1221 /* wait for lance to complete initialisation */
1222 for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1224 if (i != 100) {
1225 /* clear IDON by writing a "1", enable interrupts and start lance */
1226 outw(IDON | INEA | STRT, DEPCA_DATA);
1227 if (depca_debug > 2) {
1228 printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1230 } else {
1231 printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1232 status = -1;
1235 return status;
1238 static struct net_device_stats *depca_get_stats(struct net_device *dev)
1240 struct depca_private *lp = (struct depca_private *) dev->priv;
1242 /* Null body since there is no framing error counter */
1244 return &lp->stats;
1247 /*
1248 ** Set or clear the multicast filter for this adaptor.
1249 */
1250 static void set_multicast_list(struct net_device *dev)
1252 struct depca_private *lp = (struct depca_private *) dev->priv;
1253 u_long ioaddr = dev->base_addr;
1255 if (dev) {
1256 netif_stop_queue(dev);
1257 while (lp->tx_old != lp->tx_new); /* Wait for the ring to empty */
1259 STOP_DEPCA; /* Temporarily stop the depca. */
1260 depca_init_ring(dev); /* Initialize the descriptor rings */
1262 if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1263 lp->init_block.mode |= PROM;
1264 } else {
1265 SetMulticastFilter(dev);
1266 lp->init_block.mode &= ~PROM; /* Unset promiscuous mode */
1269 LoadCSRs(dev); /* Reload CSR3 */
1270 InitRestartDepca(dev); /* Resume normal operation. */
1271 netif_start_queue(dev); /* Unlock the TX ring */
1275 /*
1276 ** Calculate the hash code and update the logical address filter
1277 ** from a list of ethernet multicast addresses.
1278 ** Big endian crc one liner is mine, all mine, ha ha ha ha!
1279 ** LANCE calculates its hash codes big endian.
1280 */
1281 static void SetMulticastFilter(struct net_device *dev)
1283 struct depca_private *lp = (struct depca_private *) dev->priv;
1284 struct dev_mc_list *dmi = dev->mc_list;
1285 char *addrs;
1286 int i, j, bit, byte;
1287 u16 hashcode;
1288 u32 crc;
1290 if (dev->flags & IFF_ALLMULTI) { /* Set all multicast bits */
1291 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1292 lp->init_block.mcast_table[i] = (char) 0xff;
1294 } else {
1295 for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) { /* Clear the multicast table */
1296 lp->init_block.mcast_table[i] = 0;
1298 /* Add multicast addresses */
1299 for (i = 0; i < dev->mc_count; i++) { /* for each address in the list */
1300 addrs = dmi->dmi_addr;
1301 dmi = dmi->next;
1302 if ((*addrs & 0x01) == 1) { /* multicast address? */
1303 crc = ether_crc(ETH_ALEN, addrs);
1304 hashcode = (crc & 1); /* hashcode is 6 LSb of CRC ... */
1305 for (j = 0; j < 5; j++) { /* ... in reverse order. */
1306 hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1310 byte = hashcode >> 3; /* bit[3-5] -> byte in filter */
1311 bit = 1 << (hashcode & 0x07); /* bit[0-2] -> bit in byte */
1312 lp->init_block.mcast_table[byte] |= bit;
1317 return;
1320 static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1322 int status = 0;
1324 if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1325 status = -EBUSY;
1326 goto out;
1329 if (DevicePresent(ioaddr)) {
1330 status = -ENODEV;
1331 goto out_release;
1334 if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1335 status = -ENOMEM;
1336 goto out_release;
1339 return 0;
1341 out_release:
1342 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1343 out:
1344 return status;
1347 #ifdef CONFIG_MCA
1348 /*
1349 ** Microchannel bus I/O device probe
1350 */
1351 static int __init depca_mca_probe(struct device *device)
1353 unsigned char pos[2];
1354 unsigned char where;
1355 unsigned long iobase, mem_start;
1356 int irq, err;
1357 struct mca_device *mdev = to_mca_device (device);
1358 struct net_device *dev;
1359 struct depca_private *lp;
1361 /*
1362 ** Search for the adapter. If an address has been given, search
1363 ** specifically for the card at that address. Otherwise find the
1364 ** first card in the system.
1365 */
1367 pos[0] = mca_device_read_stored_pos(mdev, 2);
1368 pos[1] = mca_device_read_stored_pos(mdev, 3);
1370 /*
1371 ** IO of card is handled by bits 1 and 2 of pos0.
1372 **
1373 ** bit2 bit1 IO
1374 ** 0 0 0x2c00
1375 ** 0 1 0x2c10
1376 ** 1 0 0x2c20
1377 ** 1 1 0x2c30
1378 */
1379 where = (pos[0] & 6) >> 1;
1380 iobase = 0x2c00 + (0x10 * where);
1382 /*
1383 ** Found the adapter we were looking for. Now start setting it up.
1384 **
1385 ** First work on decoding the IRQ. It's stored in the lower 4 bits
1386 ** of pos1. Bits are as follows (from the ADF file):
1387 **
1388 ** Bits
1389 ** 3 2 1 0 IRQ
1390 ** --------------------
1391 ** 0 0 1 0 5
1392 ** 0 0 0 1 9
1393 ** 0 1 0 0 10
1394 ** 1 0 0 0 11
1395 */
1396 where = pos[1] & 0x0f;
1397 switch (where) {
1398 case 1:
1399 irq = 9;
1400 break;
1401 case 2:
1402 irq = 5;
1403 break;
1404 case 4:
1405 irq = 10;
1406 break;
1407 case 8:
1408 irq = 11;
1409 break;
1410 default:
1411 printk("%s: mca_probe IRQ error. You should never get here (%d).\n", mdev->name, where);
1412 return -EINVAL;
1415 /*
1416 ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1417 ** They are mapped as follows:
1418 **
1419 ** Bit
1420 ** 5 4 3 Memory Addresses
1421 ** 0 0 0 C0000-CFFFF (64K)
1422 ** 1 0 0 C8000-CFFFF (32K)
1423 ** 0 0 1 D0000-DFFFF (64K)
1424 ** 1 0 1 D8000-DFFFF (32K)
1425 ** 0 1 0 E0000-EFFFF (64K)
1426 ** 1 1 0 E8000-EFFFF (32K)
1427 */
1428 where = (pos[0] & 0x18) >> 3;
1429 mem_start = 0xc0000 + (where * 0x10000);
1430 if (pos[0] & 0x20) {
1431 mem_start += 0x8000;
1434 /* claim the slot */
1435 strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1436 sizeof(mdev->name));
1437 mca_device_set_claim(mdev, 1);
1439 /*
1440 ** Get everything allocated and initialized... (almost just
1441 ** like the ISA and EISA probes)
1442 */
1443 irq = mca_device_transform_irq(mdev, irq);
1444 iobase = mca_device_transform_ioport(mdev, iobase);
1446 if ((err = depca_common_init (iobase, &dev)))
1447 goto out_unclaim;
1449 dev->irq = irq;
1450 dev->base_addr = iobase;
1451 lp = dev->priv;
1452 lp->depca_bus = DEPCA_BUS_MCA;
1453 lp->adapter = depca_mca_adapter_type[mdev->index];
1454 lp->mem_start = mem_start;
1456 if ((err = depca_hw_init(dev, device)))
1457 goto out_free;
1459 return 0;
1461 out_free:
1462 free_netdev (dev);
1463 release_region (iobase, DEPCA_TOTAL_SIZE);
1464 out_unclaim:
1465 mca_device_set_claim(mdev, 0);
1467 return err;
1469 #endif
1471 /*
1472 ** ISA bus I/O device probe
1473 */
1475 static void __init depca_platform_probe (void)
1477 int i;
1478 struct platform_device *pldev;
1480 for (i = 0; depca_io_ports[i].iobase; i++) {
1481 depca_io_ports[i].device = NULL;
1483 /* if an address has been specified on the command
1484 * line, use it (if valid) */
1485 if (io && io != depca_io_ports[i].iobase)
1486 continue;
1488 pldev = platform_device_alloc(depca_string, i);
1489 if (!pldev)
1490 continue;
1492 pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1493 depca_io_ports[i].device = pldev;
1495 if (platform_device_add(pldev)) {
1496 platform_device_put(pldev);
1497 depca_io_ports[i].device = NULL;
1498 continue;
1501 if (!pldev->dev.driver) {
1502 /* The driver was not bound to this device, there was
1503 * no hardware at this address. Unregister it, as the
1504 * release fuction will take care of freeing the
1505 * allocated structure */
1507 depca_io_ports[i].device = NULL;
1508 pldev->dev.platform_data = NULL;
1509 platform_device_unregister (pldev);
1514 static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1516 u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1517 enum depca_type adapter = unknown;
1518 int i;
1520 for (i = 0; mem_base[i]; i++) {
1521 *mem_start = mem ? mem : mem_base[i];
1522 adapter = DepcaSignature (adapter_name, *mem_start);
1523 if (adapter != unknown)
1524 break;
1527 return adapter;
1530 static int __init depca_isa_probe (struct platform_device *device)
1532 struct net_device *dev;
1533 struct depca_private *lp;
1534 u_long ioaddr, mem_start = 0;
1535 enum depca_type adapter = unknown;
1536 int status = 0;
1538 ioaddr = (u_long) device->dev.platform_data;
1540 if ((status = depca_common_init (ioaddr, &dev)))
1541 goto out;
1543 adapter = depca_shmem_probe (&mem_start);
1545 if (adapter == unknown) {
1546 status = -ENODEV;
1547 goto out_free;
1550 dev->base_addr = ioaddr;
1551 dev->irq = irq; /* Use whatever value the user gave
1552 * us, and 0 if he didn't. */
1553 lp = dev->priv;
1554 lp->depca_bus = DEPCA_BUS_ISA;
1555 lp->adapter = adapter;
1556 lp->mem_start = mem_start;
1558 if ((status = depca_hw_init(dev, &device->dev)))
1559 goto out_free;
1561 return 0;
1563 out_free:
1564 free_netdev (dev);
1565 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1566 out:
1567 return status;
1570 /*
1571 ** EISA callbacks from sysfs.
1572 */
1574 #ifdef CONFIG_EISA
1575 static int __init depca_eisa_probe (struct device *device)
1577 struct eisa_device *edev;
1578 struct net_device *dev;
1579 struct depca_private *lp;
1580 u_long ioaddr, mem_start;
1581 int status = 0;
1583 edev = to_eisa_device (device);
1584 ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1586 if ((status = depca_common_init (ioaddr, &dev)))
1587 goto out;
1589 /* It would have been nice to get card configuration from the
1590 * card. Unfortunately, this register is write-only (shares
1591 * it's address with the ethernet prom)... As we don't parse
1592 * the EISA configuration structures (yet... :-), just rely on
1593 * the ISA probing to sort it out... */
1595 depca_shmem_probe (&mem_start);
1597 dev->base_addr = ioaddr;
1598 dev->irq = irq;
1599 lp = dev->priv;
1600 lp->depca_bus = DEPCA_BUS_EISA;
1601 lp->adapter = edev->id.driver_data;
1602 lp->mem_start = mem_start;
1604 if ((status = depca_hw_init(dev, device)))
1605 goto out_free;
1607 return 0;
1609 out_free:
1610 free_netdev (dev);
1611 release_region (ioaddr, DEPCA_TOTAL_SIZE);
1612 out:
1613 return status;
1615 #endif
1617 static int __devexit depca_device_remove (struct device *device)
1619 struct net_device *dev;
1620 struct depca_private *lp;
1621 int bus;
1623 dev = device->driver_data;
1624 lp = dev->priv;
1626 unregister_netdev (dev);
1627 iounmap (lp->sh_mem);
1628 release_mem_region (lp->mem_start, lp->mem_len);
1629 release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1630 bus = lp->depca_bus;
1631 free_netdev (dev);
1633 return 0;
1636 /*
1637 ** Look for a particular board name in the on-board Remote Diagnostics
1638 ** and Boot (readb) ROM. This will also give us a clue to the network RAM
1639 ** base address.
1640 */
1641 static int __init DepcaSignature(char *name, u_long base_addr)
1643 u_int i, j, k;
1644 void __iomem *ptr;
1645 char tmpstr[16];
1646 u_long prom_addr = base_addr + 0xc000;
1647 u_long mem_addr = base_addr + 0x8000; /* 32KB */
1649 /* Can't reserve the prom region, it is already marked as
1650 * used, at least on x86. Instead, reserve a memory region a
1651 * board would certainly use. If it works, go ahead. If not,
1652 * run like hell... */
1654 if (!request_mem_region (mem_addr, 16, depca_string))
1655 return unknown;
1657 /* Copy the first 16 bytes of ROM */
1659 ptr = ioremap(prom_addr, 16);
1660 if (ptr == NULL) {
1661 printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1662 return unknown;
1664 for (i = 0; i < 16; i++) {
1665 tmpstr[i] = readb(ptr + i);
1667 iounmap(ptr);
1669 release_mem_region (mem_addr, 16);
1671 /* Check if PROM contains a valid string */
1672 for (i = 0; *depca_signature[i] != '\0'; i++) {
1673 for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1674 if (depca_signature[i][k] == tmpstr[j]) { /* track signature */
1675 k++;
1676 } else { /* lost signature; begin search again */
1677 k = 0;
1680 if (k == strlen(depca_signature[i]))
1681 break;
1684 /* Check if name string is valid, provided there's no PROM */
1685 if (name && *name && (i == unknown)) {
1686 for (i = 0; *depca_signature[i] != '\0'; i++) {
1687 if (strcmp(name, depca_signature[i]) == 0)
1688 break;
1692 return i;
1695 /*
1696 ** Look for a special sequence in the Ethernet station address PROM that
1697 ** is common across all DEPCA products. Note that the original DEPCA needs
1698 ** its ROM address counter to be initialized and enabled. Only enable
1699 ** if the first address octet is a 0x08 - this minimises the chances of
1700 ** messing around with some other hardware, but it assumes that this DEPCA
1701 ** card initialized itself correctly.
1702 **
1703 ** Search the Ethernet address ROM for the signature. Since the ROM address
1704 ** counter can start at an arbitrary point, the search must include the entire
1705 ** probe sequence length plus the (length_of_the_signature - 1).
1706 ** Stop the search IMMEDIATELY after the signature is found so that the
1707 ** PROM address counter is correctly positioned at the start of the
1708 ** ethernet address for later read out.
1709 */
1710 static int __init DevicePresent(u_long ioaddr)
1712 union {
1713 struct {
1714 u32 a;
1715 u32 b;
1716 } llsig;
1717 char Sig[sizeof(u32) << 1];
1719 dev;
1720 short sigLength = 0;
1721 s8 data;
1722 s16 nicsr;
1723 int i, j, status = 0;
1725 data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1726 data = inb(DEPCA_PROM); /* read data */
1728 if (data == 0x08) { /* Enable counter on DEPCA */
1729 nicsr = inb(DEPCA_NICSR);
1730 nicsr |= AAC;
1731 outb(nicsr, DEPCA_NICSR);
1734 dev.llsig.a = ETH_PROM_SIG;
1735 dev.llsig.b = ETH_PROM_SIG;
1736 sigLength = sizeof(u32) << 1;
1738 for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1739 data = inb(DEPCA_PROM);
1740 if (dev.Sig[j] == data) { /* track signature */
1741 j++;
1742 } else { /* lost signature; begin search again */
1743 if (data == dev.Sig[0]) { /* rare case.... */
1744 j = 1;
1745 } else {
1746 j = 0;
1751 if (j != sigLength) {
1752 status = -ENODEV; /* search failed */
1755 return status;
1758 /*
1759 ** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1760 ** reason: access the upper half of the PROM with x=0; access the lower half
1761 ** with x=1.
1762 */
1763 static int __init get_hw_addr(struct net_device *dev)
1765 u_long ioaddr = dev->base_addr;
1766 struct depca_private *lp = dev->priv;
1767 int i, k, tmp, status = 0;
1768 u_short j, x, chksum;
1770 x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1772 for (i = 0, k = 0, j = 0; j < 3; j++) {
1773 k <<= 1;
1774 if (k > 0xffff)
1775 k -= 0xffff;
1777 k += (u_char) (tmp = inb(DEPCA_PROM + x));
1778 dev->dev_addr[i++] = (u_char) tmp;
1779 k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1780 dev->dev_addr[i++] = (u_char) tmp;
1782 if (k > 0xffff)
1783 k -= 0xffff;
1785 if (k == 0xffff)
1786 k = 0;
1788 chksum = (u_char) inb(DEPCA_PROM + x);
1789 chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1790 if (k != chksum)
1791 status = -1;
1793 return status;
1796 /*
1797 ** Load a packet into the shared memory
1798 */
1799 static int load_packet(struct net_device *dev, struct sk_buff *skb)
1801 struct depca_private *lp = (struct depca_private *) dev->priv;
1802 int i, entry, end, len, status = 0;
1804 entry = lp->tx_new; /* Ring around buffer number. */
1805 end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1806 if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1807 /*
1808 ** Caution: the write order is important here... don't set up the
1809 ** ownership rights until all the other information is in place.
1810 */
1811 if (end < entry) { /* wrapped buffer */
1812 len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1813 memcpy_toio(lp->tx_buff[entry], skb->data, len);
1814 memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1815 } else { /* linear buffer */
1816 memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1819 /* set up the buffer descriptors */
1820 len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1821 for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1822 /* clean out flags */
1823 writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1824 writew(0x0000, &lp->tx_ring[i].misc); /* clears other error flags */
1825 writew(-TX_BUFF_SZ, &lp->tx_ring[i].length); /* packet length in buffer */
1826 len -= TX_BUFF_SZ;
1828 /* clean out flags */
1829 writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1830 writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1831 writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1833 /* start of packet */
1834 writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1835 /* end of packet */
1836 writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1838 for (i = end; i != entry; --i) {
1839 /* ownership of packet */
1840 writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1841 if (i == 0)
1842 i = lp->txRingMask + 1;
1844 writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1846 lp->tx_new = (++end) & lp->txRingMask; /* update current pointers */
1847 } else {
1848 status = -1;
1851 return status;
1854 static void depca_dbg_open(struct net_device *dev)
1856 struct depca_private *lp = (struct depca_private *) dev->priv;
1857 u_long ioaddr = dev->base_addr;
1858 struct depca_init *p = &lp->init_block;
1859 int i;
1861 if (depca_debug > 1) {
1862 /* Do not copy the shadow init block into shared memory */
1863 /* Debugging should not affect normal operation! */
1864 /* The shadow init block will get copied across during InitRestartDepca */
1865 printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1866 printk("Descriptor head addresses (CPU):\n");
1867 printk(" 0x%lx 0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1868 printk("Descriptor addresses (CPU):\nRX: ");
1869 for (i = 0; i < lp->rxRingMask; i++) {
1870 if (i < 3) {
1871 printk("%p ", &lp->rx_ring[i].base);
1874 printk("...%p\n", &lp->rx_ring[i].base);
1875 printk("TX: ");
1876 for (i = 0; i < lp->txRingMask; i++) {
1877 if (i < 3) {
1878 printk("%p ", &lp->tx_ring[i].base);
1881 printk("...%p\n", &lp->tx_ring[i].base);
1882 printk("\nDescriptor buffers (Device):\nRX: ");
1883 for (i = 0; i < lp->rxRingMask; i++) {
1884 if (i < 3) {
1885 printk("0x%8.8x ", readl(&lp->rx_ring[i].base));
1888 printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1889 printk("TX: ");
1890 for (i = 0; i < lp->txRingMask; i++) {
1891 if (i < 3) {
1892 printk("0x%8.8x ", readl(&lp->tx_ring[i].base));
1895 printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1896 printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1897 printk(" mode: 0x%4.4x\n", p->mode);
1898 printk(" physical address: ");
1899 for (i = 0; i < ETH_ALEN - 1; i++) {
1900 printk("%2.2x:", p->phys_addr[i]);
1902 printk("%2.2x\n", p->phys_addr[i]);
1903 printk(" multicast hash table: ");
1904 for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1905 printk("%2.2x:", p->mcast_table[i]);
1907 printk("%2.2x\n", p->mcast_table[i]);
1908 printk(" rx_ring at: 0x%8.8x\n", p->rx_ring);
1909 printk(" tx_ring at: 0x%8.8x\n", p->tx_ring);
1910 printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1911 printk("Ring size:\nRX: %d Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1912 printk("TX: %d Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1913 outw(CSR2, DEPCA_ADDR);
1914 printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1915 outw(CSR1, DEPCA_ADDR);
1916 printk("%4.4x\n", inw(DEPCA_DATA));
1917 outw(CSR3, DEPCA_ADDR);
1918 printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1921 return;
1924 /*
1925 ** Perform IOCTL call functions here. Some are privileged operations and the
1926 ** effective uid is checked in those cases.
1927 ** All multicast IOCTLs will not work here and are for testing purposes only.
1928 */
1929 static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1931 struct depca_private *lp = (struct depca_private *) dev->priv;
1932 struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1933 int i, status = 0;
1934 u_long ioaddr = dev->base_addr;
1935 union {
1936 u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1937 u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1938 u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1939 } tmp;
1940 unsigned long flags;
1941 void *buf;
1943 switch (ioc->cmd) {
1944 case DEPCA_GET_HWADDR: /* Get the hardware address */
1945 for (i = 0; i < ETH_ALEN; i++) {
1946 tmp.addr[i] = dev->dev_addr[i];
1948 ioc->len = ETH_ALEN;
1949 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1950 return -EFAULT;
1951 break;
1953 case DEPCA_SET_HWADDR: /* Set the hardware address */
1954 if (!capable(CAP_NET_ADMIN))
1955 return -EPERM;
1956 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1957 return -EFAULT;
1958 for (i = 0; i < ETH_ALEN; i++) {
1959 dev->dev_addr[i] = tmp.addr[i];
1961 netif_stop_queue(dev);
1962 while (lp->tx_old != lp->tx_new)
1963 cpu_relax(); /* Wait for the ring to empty */
1965 STOP_DEPCA; /* Temporarily stop the depca. */
1966 depca_init_ring(dev); /* Initialize the descriptor rings */
1967 LoadCSRs(dev); /* Reload CSR3 */
1968 InitRestartDepca(dev); /* Resume normal operation. */
1969 netif_start_queue(dev); /* Unlock the TX ring */
1970 break;
1972 case DEPCA_SET_PROM: /* Set Promiscuous Mode */
1973 if (!capable(CAP_NET_ADMIN))
1974 return -EPERM;
1975 netif_stop_queue(dev);
1976 while (lp->tx_old != lp->tx_new)
1977 cpu_relax(); /* Wait for the ring to empty */
1979 STOP_DEPCA; /* Temporarily stop the depca. */
1980 depca_init_ring(dev); /* Initialize the descriptor rings */
1981 lp->init_block.mode |= PROM; /* Set promiscuous mode */
1983 LoadCSRs(dev); /* Reload CSR3 */
1984 InitRestartDepca(dev); /* Resume normal operation. */
1985 netif_start_queue(dev); /* Unlock the TX ring */
1986 break;
1988 case DEPCA_CLR_PROM: /* Clear Promiscuous Mode */
1989 if (!capable(CAP_NET_ADMIN))
1990 return -EPERM;
1991 netif_stop_queue(dev);
1992 while (lp->tx_old != lp->tx_new)
1993 cpu_relax(); /* Wait for the ring to empty */
1995 STOP_DEPCA; /* Temporarily stop the depca. */
1996 depca_init_ring(dev); /* Initialize the descriptor rings */
1997 lp->init_block.mode &= ~PROM; /* Clear promiscuous mode */
1999 LoadCSRs(dev); /* Reload CSR3 */
2000 InitRestartDepca(dev); /* Resume normal operation. */
2001 netif_start_queue(dev); /* Unlock the TX ring */
2002 break;
2004 case DEPCA_SAY_BOO: /* Say "Boo!" to the kernel log file */
2005 if(!capable(CAP_NET_ADMIN))
2006 return -EPERM;
2007 printk("%s: Boo!\n", dev->name);
2008 break;
2010 case DEPCA_GET_MCA: /* Get the multicast address table */
2011 ioc->len = (HASH_TABLE_LEN >> 3);
2012 if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
2013 return -EFAULT;
2014 break;
2016 case DEPCA_SET_MCA: /* Set a multicast address */
2017 if (!capable(CAP_NET_ADMIN))
2018 return -EPERM;
2019 if (ioc->len >= HASH_TABLE_LEN)
2020 return -EINVAL;
2021 if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2022 return -EFAULT;
2023 set_multicast_list(dev);
2024 break;
2026 case DEPCA_CLR_MCA: /* Clear all multicast addresses */
2027 if (!capable(CAP_NET_ADMIN))
2028 return -EPERM;
2029 set_multicast_list(dev);
2030 break;
2032 case DEPCA_MCA_EN: /* Enable pass all multicast addressing */
2033 if (!capable(CAP_NET_ADMIN))
2034 return -EPERM;
2035 set_multicast_list(dev);
2036 break;
2038 case DEPCA_GET_STATS: /* Get the driver statistics */
2039 ioc->len = sizeof(lp->pktStats);
2040 buf = kmalloc(ioc->len, GFP_KERNEL);
2041 if(!buf)
2042 return -ENOMEM;
2043 spin_lock_irqsave(&lp->lock, flags);
2044 memcpy(buf, &lp->pktStats, ioc->len);
2045 spin_unlock_irqrestore(&lp->lock, flags);
2046 if (copy_to_user(ioc->data, buf, ioc->len))
2047 status = -EFAULT;
2048 kfree(buf);
2049 break;
2051 case DEPCA_CLR_STATS: /* Zero out the driver statistics */
2052 if (!capable(CAP_NET_ADMIN))
2053 return -EPERM;
2054 spin_lock_irqsave(&lp->lock, flags);
2055 memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2056 spin_unlock_irqrestore(&lp->lock, flags);
2057 break;
2059 case DEPCA_GET_REG: /* Get the DEPCA Registers */
2060 i = 0;
2061 tmp.sval[i++] = inw(DEPCA_NICSR);
2062 outw(CSR0, DEPCA_ADDR); /* status register */
2063 tmp.sval[i++] = inw(DEPCA_DATA);
2064 memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2065 ioc->len = i + sizeof(struct depca_init);
2066 if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2067 return -EFAULT;
2068 break;
2070 default:
2071 return -EOPNOTSUPP;
2074 return status;
2077 static int __init depca_module_init (void)
2079 int err = 0;
2081 #ifdef CONFIG_MCA
2082 err = mca_register_driver (&depca_mca_driver);
2083 #endif
2084 #ifdef CONFIG_EISA
2085 err |= eisa_driver_register (&depca_eisa_driver);
2086 #endif
2087 err |= platform_driver_register (&depca_isa_driver);
2088 depca_platform_probe ();
2090 return err;
2093 static void __exit depca_module_exit (void)
2095 int i;
2096 #ifdef CONFIG_MCA
2097 mca_unregister_driver (&depca_mca_driver);
2098 #endif
2099 #ifdef CONFIG_EISA
2100 eisa_driver_unregister (&depca_eisa_driver);
2101 #endif
2102 platform_driver_unregister (&depca_isa_driver);
2104 for (i = 0; depca_io_ports[i].iobase; i++) {
2105 if (depca_io_ports[i].device) {
2106 depca_io_ports[i].device->dev.platform_data = NULL;
2107 platform_device_unregister (depca_io_ports[i].device);
2108 depca_io_ports[i].device = NULL;
2113 module_init (depca_module_init);
2114 module_exit (depca_module_exit);