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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */
2/*
3 Written 1998-2000 by Donald Becker.
4 Updates 2000 by Keith Underwood.
5
Jeff Garzik6aa20a22006-09-13 13:24:59 -04006 This software may be used and distributed according to the terms of
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 the GNU General Public License (GPL), incorporated herein by reference.
8 Drivers based on or derived from this code fall under the GPL and must
9 retain the authorship, copyright and license notice. This file is not
10 a complete program and may only be used when the entire operating
11 system is licensed under the GPL.
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 This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet
19 adapter.
20
21 Support and updates available at
22 http://www.scyld.com/network/hamachi.html
Jeff Garzik03a8c662006-06-27 07:57:22 -040023 [link no longer provides useful info -jgarzik]
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 or
25 http://www.parl.clemson.edu/~keithu/hamachi.html
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027*/
28
29#define DRV_NAME "hamachi"
Andy Gospodarekd5b20692006-09-11 17:39:18 -040030#define DRV_VERSION "2.1"
31#define DRV_RELDATE "Sept 11, 2006"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33
34/* A few user-configurable values. */
35
36static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
37#define final_version
38#define hamachi_debug debug
39/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
40static int max_interrupt_work = 40;
41static int mtu;
42/* Default values selected by testing on a dual processor PIII-450 */
43/* These six interrupt control parameters may be set directly when loading the
44 * module, or through the rx_params and tx_params variables
45 */
46static int max_rx_latency = 0x11;
47static int max_rx_gap = 0x05;
48static int min_rx_pkt = 0x18;
Jeff Garzik6aa20a22006-09-13 13:24:59 -040049static int max_tx_latency = 0x00;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050static int max_tx_gap = 0x00;
51static int min_tx_pkt = 0x30;
52
53/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
54 -Setting to > 1518 causes all frames to be copied
55 -Setting to 0 disables copies
56*/
57static int rx_copybreak;
58
59/* An override for the hardware detection of bus width.
60 Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit.
61 Add 2 to disable parity detection.
62*/
63static int force32;
64
65
66/* Used to pass the media type, etc.
67 These exist for driver interoperability.
68 No media types are currently defined.
69 - The lower 4 bits are reserved for the media type.
70 - The next three bits may be set to one of the following:
71 0x00000000 : Autodetect PCI bus
72 0x00000010 : Force 32 bit PCI bus
73 0x00000020 : Disable parity detection
74 0x00000040 : Force 64 bit PCI bus
75 Default is autodetect
76 - The next bit can be used to force half-duplex. This is a bad
77 idea since no known implementations implement half-duplex, and,
78 in general, half-duplex for gigabit ethernet is a bad idea.
Jeff Garzik6aa20a22006-09-13 13:24:59 -040079 0x00000080 : Force half-duplex
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 Default is full-duplex.
81 - In the original driver, the ninth bit could be used to force
82 full-duplex. Maintain that for compatibility
83 0x00000200 : Force full-duplex
84*/
85#define MAX_UNITS 8 /* More are supported, limit only on options */
86static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
87static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
88/* The Hamachi chipset supports 3 parameters each for Rx and Tx
89 * interruput management. Parameters will be loaded as specified into
Jeff Garzik6aa20a22006-09-13 13:24:59 -040090 * the TxIntControl and RxIntControl registers.
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 *
92 * The registers are arranged as follows:
93 * 23 - 16 15 - 8 7 - 0
94 * _________________________________
95 * | min_pkt | max_gap | max_latency |
96 * ---------------------------------
97 * min_pkt : The minimum number of packets processed between
Jeff Garzik6aa20a22006-09-13 13:24:59 -040098 * interrupts.
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 * max_gap : The maximum inter-packet gap in units of 8.192 us
100 * max_latency : The absolute time between interrupts in units of 8.192 us
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400101 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 */
103static int rx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
104static int tx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
105
106/* Operational parameters that are set at compile time. */
107
108/* Keep the ring sizes a power of two for compile efficiency.
109 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
110 Making the Tx ring too large decreases the effectiveness of channel
111 bonding and packet priority.
112 There are no ill effects from too-large receive rings, except for
113 excessive memory usage */
114/* Empirically it appears that the Tx ring needs to be a little bigger
115 for these Gbit adapters or you get into an overrun condition really
116 easily. Also, things appear to work a bit better in back-to-back
117 configurations if the Rx ring is 8 times the size of the Tx ring
118*/
119#define TX_RING_SIZE 64
120#define RX_RING_SIZE 512
121#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct hamachi_desc)
122#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct hamachi_desc)
123
124/*
125 * Enable netdev_ioctl. Added interrupt coalescing parameter adjustment.
126 * 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov>
127 */
128
129/* play with 64-bit addrlen; seems to be a teensy bit slower --pw */
130/* #define ADDRLEN 64 */
131
132/*
133 * RX_CHECKSUM turns on card-generated receive checksum generation for
134 * TCP and UDP packets. Otherwise the upper layers do the calculation.
135 * TX_CHECKSUM won't do anything too useful, even if it works. There's no
136 * easy mechanism by which to tell the TCP/UDP stack that it need not
137 * generate checksums for this device. But if somebody can find a way
138 * to get that to work, most of the card work is in here already.
139 * 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov>
140 */
141#undef TX_CHECKSUM
142#define RX_CHECKSUM
143
144/* Operational parameters that usually are not changed. */
145/* Time in jiffies before concluding the transmitter is hung. */
146#define TX_TIMEOUT (5*HZ)
147
148#include <linux/module.h>
149#include <linux/kernel.h>
150#include <linux/string.h>
151#include <linux/timer.h>
152#include <linux/time.h>
153#include <linux/errno.h>
154#include <linux/ioport.h>
155#include <linux/slab.h>
156#include <linux/interrupt.h>
157#include <linux/pci.h>
158#include <linux/init.h>
159#include <linux/ethtool.h>
160#include <linux/mii.h>
161#include <linux/netdevice.h>
162#include <linux/etherdevice.h>
163#include <linux/skbuff.h>
164#include <linux/ip.h>
165#include <linux/delay.h>
166#include <linux/bitops.h>
167
168#include <asm/uaccess.h>
169#include <asm/processor.h> /* Processor type for cache alignment. */
170#include <asm/io.h>
171#include <asm/unaligned.h>
172#include <asm/cache.h>
173
174static char version[] __devinitdata =
175KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"
176KERN_INFO " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
177KERN_INFO " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
178
179
180/* IP_MF appears to be only defined in <netinet/ip.h>, however,
181 we need it for hardware checksumming support. FYI... some of
182 the definitions in <netinet/ip.h> conflict/duplicate those in
183 other linux headers causing many compiler warnings.
184*/
185#ifndef IP_MF
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400186 #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187#endif
188
189/* Define IP_OFFSET to be IPOPT_OFFSET */
190#ifndef IP_OFFSET
191 #ifdef IPOPT_OFFSET
192 #define IP_OFFSET IPOPT_OFFSET
193 #else
194 #define IP_OFFSET 2
195 #endif
196#endif
197
198#define RUN_AT(x) (jiffies + (x))
199
viro@ZenIV.linux.org.ukf20badb2005-09-07 23:16:59 +0100200#ifndef ADDRLEN
201#define ADDRLEN 32
202#endif
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204/* Condensed bus+endian portability operations. */
205#if ADDRLEN == 64
206#define cpu_to_leXX(addr) cpu_to_le64(addr)
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400207#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208#define cpu_to_leXX(addr) cpu_to_le32(addr)
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400209#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211
212/*
213 Theory of Operation
214
215I. Board Compatibility
216
217This device driver is designed for the Packet Engines "Hamachi"
218Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
21966Mhz PCI card.
220
221II. Board-specific settings
222
223No jumpers exist on the board. The chip supports software correction of
224various motherboard wiring errors, however this driver does not support
225that feature.
226
227III. Driver operation
228
229IIIa. Ring buffers
230
231The Hamachi uses a typical descriptor based bus-master architecture.
232The descriptor list is similar to that used by the Digital Tulip.
233This driver uses two statically allocated fixed-size descriptor lists
234formed into rings by a branch from the final descriptor to the beginning of
235the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
236
237This driver uses a zero-copy receive and transmit scheme similar my other
238network drivers.
239The driver allocates full frame size skbuffs for the Rx ring buffers at
240open() time and passes the skb->data field to the Hamachi as receive data
241buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
242a fresh skbuff is allocated and the frame is copied to the new skbuff.
243When the incoming frame is larger, the skbuff is passed directly up the
244protocol stack and replaced by a newly allocated skbuff.
245
246The RX_COPYBREAK value is chosen to trade-off the memory wasted by
247using a full-sized skbuff for small frames vs. the copying costs of larger
248frames. Gigabit cards are typically used on generously configured machines
249and the underfilled buffers have negligible impact compared to the benefit of
250a single allocation size, so the default value of zero results in never
251copying packets.
252
253IIIb/c. Transmit/Receive Structure
254
255The Rx and Tx descriptor structure are straight-forward, with no historical
256baggage that must be explained. Unlike the awkward DBDMA structure, there
257are no unused fields or option bits that had only one allowable setting.
258
259Two details should be noted about the descriptors: The chip supports both 32
260bit and 64 bit address structures, and the length field is overwritten on
261the receive descriptors. The descriptor length is set in the control word
262for each channel. The development driver uses 32 bit addresses only, however
26364 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
264
265IIId. Synchronization
266
267This driver is very similar to my other network drivers.
268The driver runs as two independent, single-threaded flows of control. One
269is the send-packet routine, which enforces single-threaded use by the
270dev->tbusy flag. The other thread is the interrupt handler, which is single
271threaded by the hardware and other software.
272
273The send packet thread has partial control over the Tx ring and 'dev->tbusy'
274flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
275queue slot is empty, it clears the tbusy flag when finished otherwise it sets
276the 'hmp->tx_full' flag.
277
278The interrupt handler has exclusive control over the Rx ring and records stats
279from the Tx ring. After reaping the stats, it marks the Tx queue entry as
280empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
281clears both the tx_full and tbusy flags.
282
283IV. Notes
284
285Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
286
287IVb. References
288
289Hamachi Engineering Design Specification, 5/15/97
290(Note: This version was marked "Confidential".)
291
292IVc. Errata
293
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400294None noted.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296V. Recent Changes
297
Jeff Garzik6aa20a22006-09-13 13:24:59 -040029801/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 to help avoid some stall conditions -- this needs further research.
300
Jeff Garzik6aa20a22006-09-13 13:24:59 -040030101/15/1999 EPK Creation of the hamachi_tx function. This function cleans
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 the Tx ring and is called from hamachi_start_xmit (this used to be
303 called from hamachi_interrupt but it tends to delay execution of the
304 interrupt handler and thus reduce bandwidth by reducing the latency
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400305 between hamachi_rx()'s). Notably, some modification has been made so
306 that the cleaning loop checks only to make sure that the DescOwn bit
307 isn't set in the status flag since the card is not required
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 to set the entire flag to zero after processing.
309
Jeff Garzik6aa20a22006-09-13 13:24:59 -040031001/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 checked before attempting to add a buffer to the ring. If the ring is full
312 an attempt is made to free any dirty buffers and thus find space for
313 the new buffer or the function returns non-zero which should case the
314 scheduler to reschedule the buffer later.
315
Jeff Garzik6aa20a22006-09-13 13:24:59 -040031601/15/1999 EPK Some adjustments were made to the chip initialization.
317 End-to-end flow control should now be fully active and the interrupt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 algorithm vars have been changed. These could probably use further tuning.
319
32001/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
321 set the rx and tx latencies for the Hamachi interrupts. If you're having
322 problems with network stalls, try setting these to higher values.
323 Valid values are 0x00 through 0xff.
324
Jeff Garzik6aa20a22006-09-13 13:24:59 -040032501/15/1999 EPK In general, the overall bandwidth has increased and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 latencies are better (sometimes by a factor of 2). Stalls are rare at
327 this point, however there still appears to be a bug somewhere between the
328 hardware and driver. TCP checksum errors under load also appear to be
329 eliminated at this point.
330
33101/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
332 Rx and Tx rings. This appears to have been affecting whether a particular
333 peer-to-peer connection would hang under high load. I believe the Rx
334 rings was typically getting set correctly, but the Tx ring wasn't getting
335 the DescEndRing bit set during initialization. ??? Does this mean the
336 hamachi card is using the DescEndRing in processing even if a particular
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400337 slot isn't in use -- hypothetically, the card might be searching the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 entire Tx ring for slots with the DescOwn bit set and then processing
339 them. If the DescEndRing bit isn't set, then it might just wander off
340 through memory until it hits a chunk of data with that bit set
341 and then looping back.
342
Jeff Garzik6aa20a22006-09-13 13:24:59 -040034302/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 problem (TxCmd and RxCmd need only to be set when idle or stopped.
345
34602/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400347 (Michel Mueller pointed out the ``permanently busy'' potential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 problem here).
349
Jeff Garzik6aa20a22006-09-13 13:24:59 -040035002/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
35202/23/1999 EPK Verified that the interrupt status field bits for Tx were
353 incorrectly defined and corrected (as per Michel Mueller).
354
35502/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
356 were available before reseting the tbusy and tx_full flags
357 (as per Michel Mueller).
358
35903/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
360
36112/31/1999 KDU Cleaned up assorted things and added Don's code to force
36232 bit.
363
36402/20/2000 KDU Some of the control was just plain odd. Cleaned up the
365hamachi_start_xmit() and hamachi_interrupt() code. There is still some
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400366re-structuring I would like to do.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
36803/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
369parameters on a dual P3-450 setup yielded the new default interrupt
370mitigation parameters. Tx should interrupt VERY infrequently due to
371Eric's scheme. Rx should be more often...
372
37303/13/2000 KDU Added a patch to make the Rx Checksum code interact
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400374nicely with non-linux machines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Jeff Garzik6aa20a22006-09-13 13:24:59 -040037603/13/2000 KDU Experimented with some of the configuration values:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 -It seems that enabling PCI performance commands for descriptors
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400379 (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
380 performance impact for any of my tests. (ttcp, netpipe, netperf) I will
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 leave them that way until I hear further feedback.
382
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400383 -Increasing the PCI_LATENCY_TIMER to 130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
385 degrade performance. Leaving default at 64 pending further information.
386
Jeff Garzik6aa20a22006-09-13 13:24:59 -040038703/14/2000 KDU Further tuning:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
389 -adjusted boguscnt in hamachi_rx() to depend on interrupt
390 mitigation parameters chosen.
391
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400392 -Selected a set of interrupt parameters based on some extensive testing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 These may change with more testing.
394
395TO DO:
396
397-Consider borrowing from the acenic driver code to check PCI_COMMAND for
398PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
399that case.
400
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400401-fix the reset procedure. It doesn't quite work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402*/
403
404/* A few values that may be tweaked. */
405/* Size of each temporary Rx buffer, calculated as:
406 * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
407 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400408 * 2 more because we use skb_reserve.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 */
410#define PKT_BUF_SZ 1538
411
412/* For now, this is going to be set to the maximum size of an ethernet
413 * packet. Eventually, we may want to make it a variable that is
414 * related to the MTU
415 */
416#define MAX_FRAME_SIZE 1518
417
418/* The rest of these values should never change. */
419
420static void hamachi_timer(unsigned long data);
421
422enum capability_flags {CanHaveMII=1, };
Arjan van de Venf71e1302006-03-03 21:33:57 -0500423static const struct chip_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 u16 vendor_id, device_id, device_id_mask, pad;
425 const char *name;
426 void (*media_timer)(unsigned long data);
427 int flags;
428} chip_tbl[] = {
429 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
430 {0,},
431};
432
433/* Offsets to the Hamachi registers. Various sizes. */
434enum hamachi_offsets {
435 TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
436 RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
437 PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
438 LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
439 TxChecksum=0x074, RxChecksum=0x076,
440 TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
441 InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
442 EventStatus=0x08C,
443 MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
444 /* See enum MII_offsets below. */
445 MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
446 AddrMode=0x0D0, StationAddr=0x0D2,
447 /* Gigabit AutoNegotiation. */
448 ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
449 ANLinkPartnerAbility=0x0EA,
450 EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
451 FIFOcfg=0x0F8,
452};
453
454/* Offsets to the MII-mode registers. */
455enum MII_offsets {
456 MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
457 MII_Status=0xAE,
458};
459
460/* Bits in the interrupt status/mask registers. */
461enum intr_status_bits {
462 IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
463 IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
464 LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
465
466/* The Hamachi Rx and Tx buffer descriptors. */
467struct hamachi_desc {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400468 u32 status_n_length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469#if ADDRLEN == 64
470 u32 pad;
471 u64 addr;
472#else
473 u32 addr;
474#endif
475};
476
477/* Bits in hamachi_desc.status_n_length */
478enum desc_status_bits {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400479 DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 DescIntr=0x10000000,
481};
482
483#define PRIV_ALIGN 15 /* Required alignment mask */
484#define MII_CNT 4
485struct hamachi_private {
486 /* Descriptor rings first for alignment. Tx requires a second descriptor
487 for status. */
488 struct hamachi_desc *rx_ring;
489 struct hamachi_desc *tx_ring;
490 struct sk_buff* rx_skbuff[RX_RING_SIZE];
491 struct sk_buff* tx_skbuff[TX_RING_SIZE];
492 dma_addr_t tx_ring_dma;
493 dma_addr_t rx_ring_dma;
494 struct net_device_stats stats;
495 struct timer_list timer; /* Media selection timer. */
496 /* Frequently used and paired value: keep adjacent for cache effect. */
497 spinlock_t lock;
498 int chip_id;
499 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
500 unsigned int cur_tx, dirty_tx;
501 unsigned int rx_buf_sz; /* Based on MTU+slack. */
502 unsigned int tx_full:1; /* The Tx queue is full. */
503 unsigned int duplex_lock:1;
504 unsigned int default_port:4; /* Last dev->if_port value. */
505 /* MII transceiver section. */
506 int mii_cnt; /* MII device addresses. */
507 struct mii_if_info mii_if; /* MII lib hooks/info */
508 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
509 u32 rx_int_var, tx_int_var; /* interrupt control variables */
510 u32 option; /* Hold on to a copy of the options */
511 struct pci_dev *pci_dev;
512 void __iomem *base;
513};
514
515MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
516MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
517MODULE_LICENSE("GPL");
518
519module_param(max_interrupt_work, int, 0);
520module_param(mtu, int, 0);
521module_param(debug, int, 0);
522module_param(min_rx_pkt, int, 0);
523module_param(max_rx_gap, int, 0);
524module_param(max_rx_latency, int, 0);
525module_param(min_tx_pkt, int, 0);
526module_param(max_tx_gap, int, 0);
527module_param(max_tx_latency, int, 0);
528module_param(rx_copybreak, int, 0);
529module_param_array(rx_params, int, NULL, 0);
530module_param_array(tx_params, int, NULL, 0);
531module_param_array(options, int, NULL, 0);
532module_param_array(full_duplex, int, NULL, 0);
533module_param(force32, int, 0);
534MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt");
535MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)");
536MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)");
537MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts");
538MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
539MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
540MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts");
541MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
542MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
543MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames");
544MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
545MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
546MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
547MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)");
548MODULE_PARM_DESC(force32, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)");
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400549
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550static int read_eeprom(void __iomem *ioaddr, int location);
551static int mdio_read(struct net_device *dev, int phy_id, int location);
552static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
553static int hamachi_open(struct net_device *dev);
554static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
555static void hamachi_timer(unsigned long data);
556static void hamachi_tx_timeout(struct net_device *dev);
557static void hamachi_init_ring(struct net_device *dev);
558static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100559static irqreturn_t hamachi_interrupt(int irq, void *dev_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560static int hamachi_rx(struct net_device *dev);
561static inline int hamachi_tx(struct net_device *dev);
562static void hamachi_error(struct net_device *dev, int intr_status);
563static int hamachi_close(struct net_device *dev);
564static struct net_device_stats *hamachi_get_stats(struct net_device *dev);
565static void set_rx_mode(struct net_device *dev);
Jeff Garzik7282d492006-09-13 14:30:00 -0400566static const struct ethtool_ops ethtool_ops;
567static const struct ethtool_ops ethtool_ops_no_mii;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569static int __devinit hamachi_init_one (struct pci_dev *pdev,
570 const struct pci_device_id *ent)
571{
572 struct hamachi_private *hmp;
573 int option, i, rx_int_var, tx_int_var, boguscnt;
574 int chip_id = ent->driver_data;
575 int irq;
576 void __iomem *ioaddr;
577 unsigned long base;
578 static int card_idx;
579 struct net_device *dev;
580 void *ring_space;
581 dma_addr_t ring_dma;
582 int ret = -ENOMEM;
Joe Perches0795af52007-10-03 17:59:30 -0700583 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584
585/* when built into the kernel, we only print version if device is found */
586#ifndef MODULE
587 static int printed_version;
588 if (!printed_version++)
589 printk(version);
590#endif
591
592 if (pci_enable_device(pdev)) {
593 ret = -EIO;
594 goto err_out;
595 }
596
597 base = pci_resource_start(pdev, 0);
598#ifdef __alpha__ /* Really "64 bit addrs" */
599 base |= (pci_resource_start(pdev, 1) << 32);
600#endif
601
602 pci_set_master(pdev);
603
604 i = pci_request_regions(pdev, DRV_NAME);
Jeff Garzik2e8a5382006-06-27 10:47:51 -0400605 if (i)
606 return i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 irq = pdev->irq;
609 ioaddr = ioremap(base, 0x400);
610 if (!ioaddr)
611 goto err_out_release;
612
613 dev = alloc_etherdev(sizeof(struct hamachi_private));
614 if (!dev)
615 goto err_out_iounmap;
616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 SET_NETDEV_DEV(dev, &pdev->dev);
618
619#ifdef TX_CHECKSUM
620 printk("check that skbcopy in ip_queue_xmit isn't happening\n");
621 dev->hard_header_len += 8; /* for cksum tag */
622#endif
623
624 for (i = 0; i < 6; i++)
625 dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i)
626 : readb(ioaddr + StationAddr + i);
627
628#if ! defined(final_version)
629 if (hamachi_debug > 4)
630 for (i = 0; i < 0x10; i++)
631 printk("%2.2x%s",
632 read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n");
633#endif
634
635 hmp = netdev_priv(dev);
636 spin_lock_init(&hmp->lock);
637
638 hmp->mii_if.dev = dev;
639 hmp->mii_if.mdio_read = mdio_read;
640 hmp->mii_if.mdio_write = mdio_write;
641 hmp->mii_if.phy_id_mask = 0x1f;
642 hmp->mii_if.reg_num_mask = 0x1f;
643
644 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
645 if (!ring_space)
646 goto err_out_cleardev;
647 hmp->tx_ring = (struct hamachi_desc *)ring_space;
648 hmp->tx_ring_dma = ring_dma;
649
650 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
651 if (!ring_space)
652 goto err_out_unmap_tx;
653 hmp->rx_ring = (struct hamachi_desc *)ring_space;
654 hmp->rx_ring_dma = ring_dma;
655
656 /* Check for options being passed in */
657 option = card_idx < MAX_UNITS ? options[card_idx] : 0;
658 if (dev->mem_start)
659 option = dev->mem_start;
660
661 /* If the bus size is misidentified, do the following. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400662 force32 = force32 ? force32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 );
664 if (force32)
665 writeb(force32, ioaddr + VirtualJumpers);
666
667 /* Hmmm, do we really need to reset the chip???. */
668 writeb(0x01, ioaddr + ChipReset);
669
670 /* After a reset, the clock speed measurement of the PCI bus will not
671 * be valid for a moment. Wait for a little while until it is. If
672 * it takes more than 10ms, forget it.
673 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400674 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 i = readb(ioaddr + PCIClkMeas);
676 for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400677 udelay(10);
678 i = readb(ioaddr + PCIClkMeas);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 }
680
681 hmp->base = ioaddr;
682 dev->base_addr = (unsigned long)ioaddr;
683 dev->irq = irq;
684 pci_set_drvdata(pdev, dev);
685
686 hmp->chip_id = chip_id;
687 hmp->pci_dev = pdev;
688
689 /* The lower four bits are the media type. */
690 if (option > 0) {
691 hmp->option = option;
692 if (option & 0x200)
693 hmp->mii_if.full_duplex = 1;
694 else if (option & 0x080)
695 hmp->mii_if.full_duplex = 0;
696 hmp->default_port = option & 15;
697 if (hmp->default_port)
698 hmp->mii_if.force_media = 1;
699 }
700 if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
701 hmp->mii_if.full_duplex = 1;
702
703 /* lock the duplex mode if someone specified a value */
704 if (hmp->mii_if.full_duplex || (option & 0x080))
705 hmp->duplex_lock = 1;
706
707 /* Set interrupt tuning parameters */
708 max_rx_latency = max_rx_latency & 0x00ff;
709 max_rx_gap = max_rx_gap & 0x00ff;
710 min_rx_pkt = min_rx_pkt & 0x00ff;
711 max_tx_latency = max_tx_latency & 0x00ff;
712 max_tx_gap = max_tx_gap & 0x00ff;
713 min_tx_pkt = min_tx_pkt & 0x00ff;
714
715 rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1;
716 tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400717 hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400719 hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency);
721
722
723 /* The Hamachi-specific entries in the device structure. */
724 dev->open = &hamachi_open;
725 dev->hard_start_xmit = &hamachi_start_xmit;
726 dev->stop = &hamachi_close;
727 dev->get_stats = &hamachi_get_stats;
728 dev->set_multicast_list = &set_rx_mode;
729 dev->do_ioctl = &netdev_ioctl;
730 if (chip_tbl[hmp->chip_id].flags & CanHaveMII)
731 SET_ETHTOOL_OPS(dev, &ethtool_ops);
732 else
733 SET_ETHTOOL_OPS(dev, &ethtool_ops_no_mii);
734 dev->tx_timeout = &hamachi_tx_timeout;
735 dev->watchdog_timeo = TX_TIMEOUT;
736 if (mtu)
737 dev->mtu = mtu;
738
739 i = register_netdev(dev);
740 if (i) {
741 ret = i;
742 goto err_out_unmap_rx;
743 }
744
Joe Perches0795af52007-10-03 17:59:30 -0700745 printk(KERN_INFO "%s: %s type %x at %p, %s, IRQ %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
Joe Perches0795af52007-10-03 17:59:30 -0700747 ioaddr, print_mac(mac, dev->dev_addr), irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 i = readb(ioaddr + PCIClkMeas);
749 printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
750 "%2.2x, LPA %4.4x.\n",
751 dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
752 i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
753 readw(ioaddr + ANLinkPartnerAbility));
754
755 if (chip_tbl[hmp->chip_id].flags & CanHaveMII) {
756 int phy, phy_idx = 0;
757 for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
758 int mii_status = mdio_read(dev, phy, MII_BMSR);
759 if (mii_status != 0xffff &&
760 mii_status != 0x0000) {
761 hmp->phys[phy_idx++] = phy;
762 hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
763 printk(KERN_INFO "%s: MII PHY found at address %d, status "
764 "0x%4.4x advertising %4.4x.\n",
765 dev->name, phy, mii_status, hmp->mii_if.advertising);
766 }
767 }
768 hmp->mii_cnt = phy_idx;
769 if (hmp->mii_cnt > 0)
770 hmp->mii_if.phy_id = hmp->phys[0];
771 else
772 memset(&hmp->mii_if, 0, sizeof(hmp->mii_if));
773 }
774 /* Configure gigabit autonegotiation. */
775 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
776 writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */
777 writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */
778
779 card_idx++;
780 return 0;
781
782err_out_unmap_rx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400783 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 hmp->rx_ring_dma);
785err_out_unmap_tx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400786 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 hmp->tx_ring_dma);
788err_out_cleardev:
789 free_netdev (dev);
790err_out_iounmap:
791 iounmap(ioaddr);
792err_out_release:
793 pci_release_regions(pdev);
794err_out:
795 return ret;
796}
797
798static int __devinit read_eeprom(void __iomem *ioaddr, int location)
799{
800 int bogus_cnt = 1000;
801
802 /* We should check busy first - per docs -KDU */
803 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
804 writew(location, ioaddr + EEAddr);
805 writeb(0x02, ioaddr + EECmdStatus);
806 bogus_cnt = 1000;
807 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
808 if (hamachi_debug > 5)
809 printk(" EEPROM status is %2.2x after %d ticks.\n",
810 (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
811 return readb(ioaddr + EEData);
812}
813
814/* MII Managemen Data I/O accesses.
815 These routines assume the MDIO controller is idle, and do not exit until
816 the command is finished. */
817
818static int mdio_read(struct net_device *dev, int phy_id, int location)
819{
820 struct hamachi_private *hmp = netdev_priv(dev);
821 void __iomem *ioaddr = hmp->base;
822 int i;
823
824 /* We should check busy first - per docs -KDU */
825 for (i = 10000; i >= 0; i--)
826 if ((readw(ioaddr + MII_Status) & 1) == 0)
827 break;
828 writew((phy_id<<8) + location, ioaddr + MII_Addr);
829 writew(0x0001, ioaddr + MII_Cmd);
830 for (i = 10000; i >= 0; i--)
831 if ((readw(ioaddr + MII_Status) & 1) == 0)
832 break;
833 return readw(ioaddr + MII_Rd_Data);
834}
835
836static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
837{
838 struct hamachi_private *hmp = netdev_priv(dev);
839 void __iomem *ioaddr = hmp->base;
840 int i;
841
842 /* We should check busy first - per docs -KDU */
843 for (i = 10000; i >= 0; i--)
844 if ((readw(ioaddr + MII_Status) & 1) == 0)
845 break;
846 writew((phy_id<<8) + location, ioaddr + MII_Addr);
847 writew(value, ioaddr + MII_Wr_Data);
848
849 /* Wait for the command to finish. */
850 for (i = 10000; i >= 0; i--)
851 if ((readw(ioaddr + MII_Status) & 1) == 0)
852 break;
853 return;
854}
855
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857static int hamachi_open(struct net_device *dev)
858{
859 struct hamachi_private *hmp = netdev_priv(dev);
860 void __iomem *ioaddr = hmp->base;
861 int i;
862 u32 rx_int_var, tx_int_var;
863 u16 fifo_info;
864
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700865 i = request_irq(dev->irq, &hamachi_interrupt, IRQF_SHARED, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 if (i)
867 return i;
868
869 if (hamachi_debug > 1)
870 printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
871 dev->name, dev->irq);
872
873 hamachi_init_ring(dev);
874
875#if ADDRLEN == 64
876 /* writellll anyone ? */
877 writel(cpu_to_le64(hmp->rx_ring_dma), ioaddr + RxPtr);
878 writel(cpu_to_le64(hmp->rx_ring_dma) >> 32, ioaddr + RxPtr + 4);
879 writel(cpu_to_le64(hmp->tx_ring_dma), ioaddr + TxPtr);
880 writel(cpu_to_le64(hmp->tx_ring_dma) >> 32, ioaddr + TxPtr + 4);
881#else
882 writel(cpu_to_le32(hmp->rx_ring_dma), ioaddr + RxPtr);
883 writel(cpu_to_le32(hmp->tx_ring_dma), ioaddr + TxPtr);
884#endif
885
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400886 /* TODO: It would make sense to organize this as words since the card
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 * documentation does. -KDU
888 */
889 for (i = 0; i < 6; i++)
890 writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
891
892 /* Initialize other registers: with so many this eventually this will
893 converted to an offset/value list. */
894
895 /* Configure the FIFO */
896 fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
897 switch (fifo_info){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400898 case 0 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 /* No FIFO */
900 writew(0x0000, ioaddr + FIFOcfg);
901 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400902 case 1 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 /* Configure the FIFO for 512K external, 16K used for Tx. */
904 writew(0x0028, ioaddr + FIFOcfg);
905 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400906 case 2 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 /* Configure the FIFO for 1024 external, 32K used for Tx. */
908 writew(0x004C, ioaddr + FIFOcfg);
909 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400910 case 3 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 /* Configure the FIFO for 2048 external, 32K used for Tx. */
912 writew(0x006C, ioaddr + FIFOcfg);
913 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400914 default :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 printk(KERN_WARNING "%s: Unsupported external memory config!\n",
916 dev->name);
917 /* Default to no FIFO */
918 writew(0x0000, ioaddr + FIFOcfg);
919 break;
920 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 if (dev->if_port == 0)
923 dev->if_port = hmp->default_port;
924
925
926 /* Setting the Rx mode will start the Rx process. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400927 /* If someone didn't choose a duplex, default to full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 if (hmp->duplex_lock != 1)
929 hmp->mii_if.full_duplex = 1;
930
931 /* always 1, takes no more time to do it */
932 writew(0x0001, ioaddr + RxChecksum);
933#ifdef TX_CHECKSUM
934 writew(0x0001, ioaddr + TxChecksum);
935#else
936 writew(0x0000, ioaddr + TxChecksum);
937#endif
938 writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
939 writew(0x215F, ioaddr + MACCnfg);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400940 writew(0x000C, ioaddr + FrameGap0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
942 writew(0x1018, ioaddr + FrameGap1);
943 /* Why do we enable receives/transmits here? -KDU */
944 writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
945 /* Enable automatic generation of flow control frames, period 0xffff. */
946 writel(0x0030FFFF, ioaddr + FlowCtrl);
947 writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
948
949 /* Enable legacy links. */
950 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
951 /* Initial Link LED to blinking red. */
952 writeb(0x03, ioaddr + LEDCtrl);
953
954 /* Configure interrupt mitigation. This has a great effect on
955 performance, so systems tuning should start here!. */
956
957 rx_int_var = hmp->rx_int_var;
958 tx_int_var = hmp->tx_int_var;
959
960 if (hamachi_debug > 1) {
961 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400962 tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 (tx_int_var & 0x00ff0000) >> 16);
964 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400965 rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 (rx_int_var & 0x00ff0000) >> 16);
967 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
968 }
969
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400970 writel(tx_int_var, ioaddr + TxIntrCtrl);
971 writel(rx_int_var, ioaddr + RxIntrCtrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
973 set_rx_mode(dev);
974
975 netif_start_queue(dev);
976
977 /* Enable interrupts by setting the interrupt mask. */
978 writel(0x80878787, ioaddr + InterruptEnable);
979 writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
980
981 /* Configure and start the DMA channels. */
982 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
983#if ADDRLEN == 64
984 writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
985 writew(0x005D, ioaddr + TxDMACtrl);
986#else
987 writew(0x001D, ioaddr + RxDMACtrl);
988 writew(0x001D, ioaddr + TxDMACtrl);
989#endif
990 writew(0x0001, ioaddr + RxCmd);
991
992 if (hamachi_debug > 2) {
993 printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
994 dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
995 }
996 /* Set the timer to check for link beat. */
997 init_timer(&hmp->timer);
998 hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
999 hmp->timer.data = (unsigned long)dev;
1000 hmp->timer.function = &hamachi_timer; /* timer handler */
1001 add_timer(&hmp->timer);
1002
1003 return 0;
1004}
1005
1006static inline int hamachi_tx(struct net_device *dev)
1007{
1008 struct hamachi_private *hmp = netdev_priv(dev);
1009
1010 /* Update the dirty pointer until we find an entry that is
1011 still owned by the card */
1012 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
1013 int entry = hmp->dirty_tx % TX_RING_SIZE;
1014 struct sk_buff *skb;
1015
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001016 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 break;
1018 /* Free the original skb. */
1019 skb = hmp->tx_skbuff[entry];
Stephen Hemmingerddfce6b2007-10-05 17:19:47 -07001020 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001021 pci_unmap_single(hmp->pci_dev,
1022 hmp->tx_ring[entry].addr, skb->len,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 PCI_DMA_TODEVICE);
1024 dev_kfree_skb(skb);
1025 hmp->tx_skbuff[entry] = NULL;
1026 }
1027 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001028 if (entry >= TX_RING_SIZE-1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001030 cpu_to_le32(DescEndRing);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 hmp->stats.tx_packets++;
1032 }
1033
1034 return 0;
1035}
1036
1037static void hamachi_timer(unsigned long data)
1038{
1039 struct net_device *dev = (struct net_device *)data;
1040 struct hamachi_private *hmp = netdev_priv(dev);
1041 void __iomem *ioaddr = hmp->base;
1042 int next_tick = 10*HZ;
1043
1044 if (hamachi_debug > 2) {
1045 printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
1046 "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
1047 readw(ioaddr + ANLinkPartnerAbility));
1048 printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1049 "%4.4x %4.4x %4.4x.\n", dev->name,
1050 readw(ioaddr + 0x0e0),
1051 readw(ioaddr + 0x0e2),
1052 readw(ioaddr + 0x0e4),
1053 readw(ioaddr + 0x0e6),
1054 readw(ioaddr + 0x0e8),
1055 readw(ioaddr + 0x0eA));
1056 }
1057 /* We could do something here... nah. */
1058 hmp->timer.expires = RUN_AT(next_tick);
1059 add_timer(&hmp->timer);
1060}
1061
1062static void hamachi_tx_timeout(struct net_device *dev)
1063{
1064 int i;
1065 struct hamachi_private *hmp = netdev_priv(dev);
1066 void __iomem *ioaddr = hmp->base;
1067
1068 printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
1069 " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
1070
1071 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
1073 for (i = 0; i < RX_RING_SIZE; i++)
1074 printk(" %8.8x", (unsigned int)hmp->rx_ring[i].status_n_length);
1075 printk("\n"KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
1076 for (i = 0; i < TX_RING_SIZE; i++)
1077 printk(" %4.4x", hmp->tx_ring[i].status_n_length);
1078 printk("\n");
1079 }
1080
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001081 /* Reinit the hardware and make sure the Rx and Tx processes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 are up and running.
1083 */
1084 dev->if_port = 0;
1085 /* The right way to do Reset. -KDU
1086 * -Clear OWN bit in all Rx/Tx descriptors
1087 * -Wait 50 uS for channels to go idle
1088 * -Turn off MAC receiver
1089 * -Issue Reset
1090 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001091
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 for (i = 0; i < RX_RING_SIZE; i++)
1093 hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
1094
1095 /* Presume that all packets in the Tx queue are gone if we have to
1096 * re-init the hardware.
1097 */
1098 for (i = 0; i < TX_RING_SIZE; i++){
1099 struct sk_buff *skb;
1100
1101 if (i >= TX_RING_SIZE - 1)
1102 hmp->tx_ring[i].status_n_length = cpu_to_le32(
1103 DescEndRing |
1104 (hmp->tx_ring[i].status_n_length & 0x0000FFFF));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001105 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 hmp->tx_ring[i].status_n_length &= 0x0000ffff;
1107 skb = hmp->tx_skbuff[i];
1108 if (skb){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001109 pci_unmap_single(hmp->pci_dev, hmp->tx_ring[i].addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 skb->len, PCI_DMA_TODEVICE);
1111 dev_kfree_skb(skb);
1112 hmp->tx_skbuff[i] = NULL;
1113 }
1114 }
1115
1116 udelay(60); /* Sleep 60 us just for safety sake */
1117 writew(0x0002, ioaddr + RxCmd); /* STOP Rx */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001118
1119 writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
1121 hmp->tx_full = 0;
1122 hmp->cur_rx = hmp->cur_tx = 0;
1123 hmp->dirty_rx = hmp->dirty_tx = 0;
1124 /* Rx packets are also presumed lost; however, we need to make sure a
1125 * ring of buffers is in tact. -KDU
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001126 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 for (i = 0; i < RX_RING_SIZE; i++){
1128 struct sk_buff *skb = hmp->rx_skbuff[i];
1129
1130 if (skb){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001131 pci_unmap_single(hmp->pci_dev, hmp->rx_ring[i].addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1133 dev_kfree_skb(skb);
1134 hmp->rx_skbuff[i] = NULL;
1135 }
1136 }
1137 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1138 for (i = 0; i < RX_RING_SIZE; i++) {
1139 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1140 hmp->rx_skbuff[i] = skb;
1141 if (skb == NULL)
1142 break;
1143 skb->dev = dev; /* Mark as being used by this device. */
1144 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001145 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001146 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001147 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
1149 }
1150 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1151 /* Mark the last entry as wrapping the ring. */
1152 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1153
1154 /* Trigger an immediate transmit demand. */
1155 dev->trans_start = jiffies;
1156 hmp->stats.tx_errors++;
1157
1158 /* Restart the chip's Tx/Rx processes . */
1159 writew(0x0002, ioaddr + TxCmd); /* STOP Tx */
1160 writew(0x0001, ioaddr + TxCmd); /* START Tx */
1161 writew(0x0001, ioaddr + RxCmd); /* START Rx */
1162
1163 netif_wake_queue(dev);
1164}
1165
1166
1167/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1168static void hamachi_init_ring(struct net_device *dev)
1169{
1170 struct hamachi_private *hmp = netdev_priv(dev);
1171 int i;
1172
1173 hmp->tx_full = 0;
1174 hmp->cur_rx = hmp->cur_tx = 0;
1175 hmp->dirty_rx = hmp->dirty_tx = 0;
1176
1177#if 0
1178 /* This is wrong. I'm not sure what the original plan was, but this
1179 * is wrong. An MTU of 1 gets you a buffer of 1536, while an MTU
1180 * of 1501 gets a buffer of 1533? -KDU
1181 */
1182 hmp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
1183#endif
1184 /* My attempt at a reasonable correction */
1185 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001186 * card needs room to do 8 byte alignment, +2 so we can reserve
1187 * the first 2 bytes, and +16 gets room for the status word from the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 * card. -KDU
1189 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001190 hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 (((dev->mtu+26+7) & ~7) + 2 + 16));
1192
1193 /* Initialize all Rx descriptors. */
1194 for (i = 0; i < RX_RING_SIZE; i++) {
1195 hmp->rx_ring[i].status_n_length = 0;
1196 hmp->rx_skbuff[i] = NULL;
1197 }
1198 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1199 for (i = 0; i < RX_RING_SIZE; i++) {
1200 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1201 hmp->rx_skbuff[i] = skb;
1202 if (skb == NULL)
1203 break;
1204 skb->dev = dev; /* Mark as being used by this device. */
1205 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001206 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001207 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001209 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
1211 }
1212 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1213 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1214
1215 for (i = 0; i < TX_RING_SIZE; i++) {
1216 hmp->tx_skbuff[i] = NULL;
1217 hmp->tx_ring[i].status_n_length = 0;
1218 }
1219 /* Mark the last entry of the ring */
1220 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1221
1222 return;
1223}
1224
1225
1226#ifdef TX_CHECKSUM
1227#define csum_add(it, val) \
1228do { \
1229 it += (u16) (val); \
1230 if (it & 0xffff0000) { \
1231 it &= 0xffff; \
1232 ++it; \
1233 } \
1234} while (0)
1235 /* printk("add %04x --> %04x\n", val, it); \ */
1236
1237/* uh->len already network format, do not swap */
1238#define pseudo_csum_udp(sum,ih,uh) do { \
1239 sum = 0; \
1240 csum_add(sum, (ih)->saddr >> 16); \
1241 csum_add(sum, (ih)->saddr & 0xffff); \
1242 csum_add(sum, (ih)->daddr >> 16); \
1243 csum_add(sum, (ih)->daddr & 0xffff); \
1244 csum_add(sum, __constant_htons(IPPROTO_UDP)); \
1245 csum_add(sum, (uh)->len); \
1246} while (0)
1247
1248/* swap len */
1249#define pseudo_csum_tcp(sum,ih,len) do { \
1250 sum = 0; \
1251 csum_add(sum, (ih)->saddr >> 16); \
1252 csum_add(sum, (ih)->saddr & 0xffff); \
1253 csum_add(sum, (ih)->daddr >> 16); \
1254 csum_add(sum, (ih)->daddr & 0xffff); \
1255 csum_add(sum, __constant_htons(IPPROTO_TCP)); \
1256 csum_add(sum, htons(len)); \
1257} while (0)
1258#endif
1259
1260static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev)
1261{
1262 struct hamachi_private *hmp = netdev_priv(dev);
1263 unsigned entry;
1264 u16 status;
1265
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001266 /* Ok, now make sure that the queue has space before trying to
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 add another skbuff. if we return non-zero the scheduler
1268 should interpret this as a queue full and requeue the buffer
1269 for later.
1270 */
1271 if (hmp->tx_full) {
1272 /* We should NEVER reach this point -KDU */
1273 printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
1274
1275 /* Wake the potentially-idle transmit channel. */
1276 /* If we don't need to read status, DON'T -KDU */
1277 status=readw(hmp->base + TxStatus);
1278 if( !(status & 0x0001) || (status & 0x0002))
1279 writew(0x0001, hmp->base + TxCmd);
1280 return 1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283 /* Caution: the write order is important here, set the field
1284 with the "ownership" bits last. */
1285
1286 /* Calculate the next Tx descriptor entry. */
1287 entry = hmp->cur_tx % TX_RING_SIZE;
1288
1289 hmp->tx_skbuff[entry] = skb;
1290
1291#ifdef TX_CHECKSUM
1292 {
1293 /* tack on checksum tag */
1294 u32 tagval = 0;
1295 struct ethhdr *eh = (struct ethhdr *)skb->data;
1296 if (eh->h_proto == __constant_htons(ETH_P_IP)) {
1297 struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
1298 if (ih->protocol == IPPROTO_UDP) {
1299 struct udphdr *uh
1300 = (struct udphdr *)((char *)ih + ih->ihl*4);
1301 u32 offset = ((unsigned char *)uh + 6) - skb->data;
1302 u32 pseudo;
1303 pseudo_csum_udp(pseudo, ih, uh);
1304 pseudo = htons(pseudo);
1305 printk("udp cksum was %04x, sending pseudo %04x\n",
1306 uh->check, pseudo);
1307 uh->check = 0; /* zero out uh->check before card calc */
1308 /*
1309 * start at 14 (skip ethhdr), store at offset (uh->check),
1310 * use pseudo value given.
1311 */
1312 tagval = (14 << 24) | (offset << 16) | pseudo;
1313 } else if (ih->protocol == IPPROTO_TCP) {
1314 printk("tcp, no auto cksum\n");
1315 }
1316 }
1317 *(u32 *)skb_push(skb, 8) = tagval;
1318 }
1319#endif
1320
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001321 hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 skb->data, skb->len, PCI_DMA_TODEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 /* Hmmmm, could probably put a DescIntr on these, but the way
1325 the driver is currently coded makes Tx interrupts unnecessary
1326 since the clearing of the Tx ring is handled by the start_xmit
1327 routine. This organization helps mitigate the interrupts a
1328 bit and probably renders the max_tx_latency param useless.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001329
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 Update: Putting a DescIntr bit on all of the descriptors and
1331 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1332 */
1333 if (entry >= TX_RING_SIZE-1) /* Wrap ring */
1334 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1335 DescEndPacket | DescEndRing | DescIntr | skb->len);
1336 else
1337 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1338 DescEndPacket | DescIntr | skb->len);
1339 hmp->cur_tx++;
1340
1341 /* Non-x86 Todo: explicitly flush cache lines here. */
1342
1343 /* Wake the potentially-idle transmit channel. */
1344 /* If we don't need to read status, DON'T -KDU */
1345 status=readw(hmp->base + TxStatus);
1346 if( !(status & 0x0001) || (status & 0x0002))
1347 writew(0x0001, hmp->base + TxCmd);
1348
1349 /* Immediately before returning, let's clear as many entries as we can. */
1350 hamachi_tx(dev);
1351
1352 /* We should kick the bottom half here, since we are not accepting
1353 * interrupts with every packet. i.e. realize that Gigabit ethernet
1354 * can transmit faster than ordinary machines can load packets;
1355 * hence, any packet that got put off because we were in the transmit
1356 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1357 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001358 if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 netif_wake_queue(dev); /* Typical path */
1360 else {
1361 hmp->tx_full = 1;
1362 netif_stop_queue(dev);
1363 }
1364 dev->trans_start = jiffies;
1365
1366 if (hamachi_debug > 4) {
1367 printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n",
1368 dev->name, hmp->cur_tx, entry);
1369 }
1370 return 0;
1371}
1372
1373/* The interrupt handler does all of the Rx thread work and cleans up
1374 after the Tx thread. */
David Howells7d12e782006-10-05 14:55:46 +01001375static irqreturn_t hamachi_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376{
1377 struct net_device *dev = dev_instance;
1378 struct hamachi_private *hmp = netdev_priv(dev);
1379 void __iomem *ioaddr = hmp->base;
1380 long boguscnt = max_interrupt_work;
1381 int handled = 0;
1382
1383#ifndef final_version /* Can never occur. */
1384 if (dev == NULL) {
1385 printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
1386 return IRQ_NONE;
1387 }
1388#endif
1389
1390 spin_lock(&hmp->lock);
1391
1392 do {
1393 u32 intr_status = readl(ioaddr + InterruptClear);
1394
1395 if (hamachi_debug > 4)
1396 printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
1397 dev->name, intr_status);
1398
1399 if (intr_status == 0)
1400 break;
1401
1402 handled = 1;
1403
1404 if (intr_status & IntrRxDone)
1405 hamachi_rx(dev);
1406
1407 if (intr_status & IntrTxDone){
1408 /* This code should RARELY need to execute. After all, this is
1409 * a gigabit link, it should consume packets as fast as we put
1410 * them in AND we clear the Tx ring in hamachi_start_xmit().
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001411 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 if (hmp->tx_full){
1413 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){
1414 int entry = hmp->dirty_tx % TX_RING_SIZE;
1415 struct sk_buff *skb;
1416
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001417 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 break;
1419 skb = hmp->tx_skbuff[entry];
1420 /* Free the original skb. */
1421 if (skb){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001422 pci_unmap_single(hmp->pci_dev,
1423 hmp->tx_ring[entry].addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 skb->len,
1425 PCI_DMA_TODEVICE);
1426 dev_kfree_skb_irq(skb);
1427 hmp->tx_skbuff[entry] = NULL;
1428 }
1429 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001430 if (entry >= TX_RING_SIZE-1)
1431 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 cpu_to_le32(DescEndRing);
1433 hmp->stats.tx_packets++;
1434 }
1435 if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){
1436 /* The ring is no longer full */
1437 hmp->tx_full = 0;
1438 netif_wake_queue(dev);
1439 }
1440 } else {
1441 netif_wake_queue(dev);
1442 }
1443 }
1444
1445
1446 /* Abnormal error summary/uncommon events handlers. */
1447 if (intr_status &
1448 (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
1449 LinkChange | NegotiationChange | StatsMax))
1450 hamachi_error(dev, intr_status);
1451
1452 if (--boguscnt < 0) {
1453 printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n",
1454 dev->name, intr_status);
1455 break;
1456 }
1457 } while (1);
1458
1459 if (hamachi_debug > 3)
1460 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1461 dev->name, readl(ioaddr + IntrStatus));
1462
1463#ifndef final_version
1464 /* Code that should never be run! Perhaps remove after testing.. */
1465 {
1466 static int stopit = 10;
1467 if (dev->start == 0 && --stopit < 0) {
1468 printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
1469 dev->name);
1470 free_irq(irq, dev);
1471 }
1472 }
1473#endif
1474
1475 spin_unlock(&hmp->lock);
1476 return IRQ_RETVAL(handled);
1477}
1478
1479/* This routine is logically part of the interrupt handler, but separated
1480 for clarity and better register allocation. */
1481static int hamachi_rx(struct net_device *dev)
1482{
1483 struct hamachi_private *hmp = netdev_priv(dev);
1484 int entry = hmp->cur_rx % RX_RING_SIZE;
1485 int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx;
1486
1487 if (hamachi_debug > 4) {
1488 printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
1489 entry, hmp->rx_ring[entry].status_n_length);
1490 }
1491
1492 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1493 while (1) {
1494 struct hamachi_desc *desc = &(hmp->rx_ring[entry]);
1495 u32 desc_status = le32_to_cpu(desc->status_n_length);
1496 u16 data_size = desc_status; /* Implicit truncate */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001497 u8 *buf_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 s32 frame_status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001499
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 if (desc_status & DescOwn)
1501 break;
1502 pci_dma_sync_single_for_cpu(hmp->pci_dev,
1503 desc->addr,
1504 hmp->rx_buf_sz,
1505 PCI_DMA_FROMDEVICE);
David S. Miller689be432005-06-28 15:25:31 -07001506 buf_addr = (u8 *) hmp->rx_skbuff[entry]->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 frame_status = le32_to_cpu(get_unaligned((s32*)&(buf_addr[data_size - 12])));
1508 if (hamachi_debug > 4)
1509 printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n",
1510 frame_status);
1511 if (--boguscnt < 0)
1512 break;
1513 if ( ! (desc_status & DescEndPacket)) {
1514 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1515 "multiple buffers, entry %#x length %d status %4.4x!\n",
1516 dev->name, hmp->cur_rx, data_size, desc_status);
1517 printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
1518 dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
1519 printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1520 dev->name,
1521 hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0xffff0000,
1522 hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0x0000ffff,
1523 hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length);
1524 hmp->stats.rx_length_errors++;
1525 } /* else Omit for prototype errata??? */
1526 if (frame_status & 0x00380000) {
1527 /* There was an error. */
1528 if (hamachi_debug > 2)
1529 printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n",
1530 frame_status);
1531 hmp->stats.rx_errors++;
1532 if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
1533 if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
1534 if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
1535 if (frame_status < 0) hmp->stats.rx_dropped++;
1536 } else {
1537 struct sk_buff *skb;
1538 /* Omit CRC */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001539 u16 pkt_len = (frame_status & 0x07ff) - 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540#ifdef RX_CHECKSUM
1541 u32 pfck = *(u32 *) &buf_addr[data_size - 8];
1542#endif
1543
1544
1545#ifndef final_version
1546 if (hamachi_debug > 4)
1547 printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d"
1548 " of %d, bogus_cnt %d.\n",
1549 pkt_len, data_size, boguscnt);
1550 if (hamachi_debug > 5)
1551 printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1552 dev->name,
1553 *(s32*)&(buf_addr[data_size - 20]),
1554 *(s32*)&(buf_addr[data_size - 16]),
1555 *(s32*)&(buf_addr[data_size - 12]),
1556 *(s32*)&(buf_addr[data_size - 8]),
1557 *(s32*)&(buf_addr[data_size - 4]));
1558#endif
1559 /* Check if the packet is long enough to accept without copying
1560 to a minimally-sized skbuff. */
1561 if (pkt_len < rx_copybreak
1562 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1563#ifdef RX_CHECKSUM
1564 printk(KERN_ERR "%s: rx_copybreak non-zero "
1565 "not good with RX_CHECKSUM\n", dev->name);
1566#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 skb_reserve(skb, 2); /* 16 byte align the IP header */
1568 pci_dma_sync_single_for_cpu(hmp->pci_dev,
1569 hmp->rx_ring[entry].addr,
1570 hmp->rx_buf_sz,
1571 PCI_DMA_FROMDEVICE);
1572 /* Call copy + cksum if available. */
1573#if 1 || USE_IP_COPYSUM
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001574 skb_copy_to_linear_data(skb,
1575 hmp->rx_skbuff[entry]->data, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 skb_put(skb, pkt_len);
1577#else
1578 memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma
1579 + entry*sizeof(*desc), pkt_len);
1580#endif
1581 pci_dma_sync_single_for_device(hmp->pci_dev,
1582 hmp->rx_ring[entry].addr,
1583 hmp->rx_buf_sz,
1584 PCI_DMA_FROMDEVICE);
1585 } else {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001586 pci_unmap_single(hmp->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 hmp->rx_ring[entry].addr,
1588 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1589 skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
1590 hmp->rx_skbuff[entry] = NULL;
1591 }
1592 skb->protocol = eth_type_trans(skb, dev);
1593
1594
1595#ifdef RX_CHECKSUM
1596 /* TCP or UDP on ipv4, DIX encoding */
1597 if (pfck>>24 == 0x91 || pfck>>24 == 0x51) {
1598 struct iphdr *ih = (struct iphdr *) skb->data;
1599 /* Check that IP packet is at least 46 bytes, otherwise,
1600 * there may be pad bytes included in the hardware checksum.
1601 * This wouldn't happen if everyone padded with 0.
1602 */
1603 if (ntohs(ih->tot_len) >= 46){
1604 /* don't worry about frags */
1605 if (!(ih->frag_off & __constant_htons(IP_MF|IP_OFFSET))) {
1606 u32 inv = *(u32 *) &buf_addr[data_size - 16];
1607 u32 *p = (u32 *) &buf_addr[data_size - 20];
1608 register u32 crc, p_r, p_r1;
1609
1610 if (inv & 4) {
1611 inv &= ~4;
1612 --p;
1613 }
1614 p_r = *p;
1615 p_r1 = *(p-1);
1616 switch (inv) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001617 case 0:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 crc = (p_r & 0xffff) + (p_r >> 16);
1619 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001620 case 1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 crc = (p_r >> 16) + (p_r & 0xffff)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001622 + (p_r1 >> 16 & 0xff00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001624 case 2:
1625 crc = p_r + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001627 case 3:
1628 crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 break;
1630 default: /*NOTREACHED*/ crc = 0;
1631 }
1632 if (crc & 0xffff0000) {
1633 crc &= 0xffff;
1634 ++crc;
1635 }
1636 /* tcp/udp will add in pseudo */
1637 skb->csum = ntohs(pfck & 0xffff);
1638 if (skb->csum > crc)
1639 skb->csum -= crc;
1640 else
1641 skb->csum += (~crc & 0xffff);
1642 /*
1643 * could do the pseudo myself and return
1644 * CHECKSUM_UNNECESSARY
1645 */
Patrick McHardy84fa7932006-08-29 16:44:56 -07001646 skb->ip_summed = CHECKSUM_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001648 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 }
1650#endif /* RX_CHECKSUM */
1651
1652 netif_rx(skb);
1653 dev->last_rx = jiffies;
1654 hmp->stats.rx_packets++;
1655 }
1656 entry = (++hmp->cur_rx) % RX_RING_SIZE;
1657 }
1658
1659 /* Refill the Rx ring buffers. */
1660 for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
1661 struct hamachi_desc *desc;
1662
1663 entry = hmp->dirty_rx % RX_RING_SIZE;
1664 desc = &(hmp->rx_ring[entry]);
1665 if (hmp->rx_skbuff[entry] == NULL) {
1666 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1667
1668 hmp->rx_skbuff[entry] = skb;
1669 if (skb == NULL)
1670 break; /* Better luck next round. */
1671 skb->dev = dev; /* Mark as being used by this device. */
1672 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001673 desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001674 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 }
1676 desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
1677 if (entry >= RX_RING_SIZE-1)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001678 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 DescEndPacket | DescEndRing | DescIntr);
1680 else
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001681 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 DescEndPacket | DescIntr);
1683 }
1684
1685 /* Restart Rx engine if stopped. */
1686 /* If we don't need to check status, don't. -KDU */
1687 if (readw(hmp->base + RxStatus) & 0x0002)
1688 writew(0x0001, hmp->base + RxCmd);
1689
1690 return 0;
1691}
1692
1693/* This is more properly named "uncommon interrupt events", as it covers more
1694 than just errors. */
1695static void hamachi_error(struct net_device *dev, int intr_status)
1696{
1697 struct hamachi_private *hmp = netdev_priv(dev);
1698 void __iomem *ioaddr = hmp->base;
1699
1700 if (intr_status & (LinkChange|NegotiationChange)) {
1701 if (hamachi_debug > 1)
1702 printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
1703 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1704 dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
1705 readw(ioaddr + ANLinkPartnerAbility),
1706 readl(ioaddr + IntrStatus));
1707 if (readw(ioaddr + ANStatus) & 0x20)
1708 writeb(0x01, ioaddr + LEDCtrl);
1709 else
1710 writeb(0x03, ioaddr + LEDCtrl);
1711 }
1712 if (intr_status & StatsMax) {
1713 hamachi_get_stats(dev);
1714 /* Read the overflow bits to clear. */
1715 readl(ioaddr + 0x370);
1716 readl(ioaddr + 0x3F0);
1717 }
1718 if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone))
1719 && hamachi_debug)
1720 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
1721 dev->name, intr_status);
1722 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1723 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
1724 hmp->stats.tx_fifo_errors++;
1725 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
1726 hmp->stats.rx_fifo_errors++;
1727}
1728
1729static int hamachi_close(struct net_device *dev)
1730{
1731 struct hamachi_private *hmp = netdev_priv(dev);
1732 void __iomem *ioaddr = hmp->base;
1733 struct sk_buff *skb;
1734 int i;
1735
1736 netif_stop_queue(dev);
1737
1738 if (hamachi_debug > 1) {
1739 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1740 dev->name, readw(ioaddr + TxStatus),
1741 readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
1742 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1743 dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
1744 }
1745
1746 /* Disable interrupts by clearing the interrupt mask. */
1747 writel(0x0000, ioaddr + InterruptEnable);
1748
1749 /* Stop the chip's Tx and Rx processes. */
1750 writel(2, ioaddr + RxCmd);
1751 writew(2, ioaddr + TxCmd);
1752
1753#ifdef __i386__
1754 if (hamachi_debug > 2) {
1755 printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
1756 (int)hmp->tx_ring_dma);
1757 for (i = 0; i < TX_RING_SIZE; i++)
1758 printk(" %c #%d desc. %8.8x %8.8x.\n",
1759 readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
1760 i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
1761 printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
1762 (int)hmp->rx_ring_dma);
1763 for (i = 0; i < RX_RING_SIZE; i++) {
1764 printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
1765 readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
1766 i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
1767 if (hamachi_debug > 6) {
David S. Miller689be432005-06-28 15:25:31 -07001768 if (*(u8*)hmp->rx_skbuff[i]->data != 0x69) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 u16 *addr = (u16 *)
David S. Miller689be432005-06-28 15:25:31 -07001770 hmp->rx_skbuff[i]->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 int j;
1772
1773 for (j = 0; j < 0x50; j++)
1774 printk(" %4.4x", addr[j]);
1775 printk("\n");
1776 }
1777 }
1778 }
1779 }
1780#endif /* __i386__ debugging only */
1781
1782 free_irq(dev->irq, dev);
1783
1784 del_timer_sync(&hmp->timer);
1785
1786 /* Free all the skbuffs in the Rx queue. */
1787 for (i = 0; i < RX_RING_SIZE; i++) {
1788 skb = hmp->rx_skbuff[i];
1789 hmp->rx_ring[i].status_n_length = 0;
1790 hmp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
1791 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001792 pci_unmap_single(hmp->pci_dev,
1793 hmp->rx_ring[i].addr, hmp->rx_buf_sz,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 PCI_DMA_FROMDEVICE);
1795 dev_kfree_skb(skb);
1796 hmp->rx_skbuff[i] = NULL;
1797 }
1798 }
1799 for (i = 0; i < TX_RING_SIZE; i++) {
1800 skb = hmp->tx_skbuff[i];
1801 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001802 pci_unmap_single(hmp->pci_dev,
1803 hmp->tx_ring[i].addr, skb->len,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 PCI_DMA_TODEVICE);
1805 dev_kfree_skb(skb);
1806 hmp->tx_skbuff[i] = NULL;
1807 }
1808 }
1809
1810 writeb(0x00, ioaddr + LEDCtrl);
1811
1812 return 0;
1813}
1814
1815static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
1816{
1817 struct hamachi_private *hmp = netdev_priv(dev);
1818 void __iomem *ioaddr = hmp->base;
1819
1820 /* We should lock this segment of code for SMP eventually, although
1821 the vulnerability window is very small and statistics are
1822 non-critical. */
1823 /* Ok, what goes here? This appears to be stuck at 21 packets
1824 according to ifconfig. It does get incremented in hamachi_tx(),
1825 so I think I'll comment it out here and see if better things
1826 happen.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001827 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1829
1830 hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
1831 hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
1832 hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
1833
1834 hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
1835 hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
1836 hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
1837 hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
1838 hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
1839
1840 return &hmp->stats;
1841}
1842
1843static void set_rx_mode(struct net_device *dev)
1844{
1845 struct hamachi_private *hmp = netdev_priv(dev);
1846 void __iomem *ioaddr = hmp->base;
1847
1848 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 writew(0x000F, ioaddr + AddrMode);
1850 } else if ((dev->mc_count > 63) || (dev->flags & IFF_ALLMULTI)) {
1851 /* Too many to match, or accept all multicasts. */
1852 writew(0x000B, ioaddr + AddrMode);
1853 } else if (dev->mc_count > 0) { /* Must use the CAM filter. */
1854 struct dev_mc_list *mclist;
1855 int i;
1856 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1857 i++, mclist = mclist->next) {
1858 writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
1859 writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
1860 ioaddr + 0x104 + i*8);
1861 }
1862 /* Clear remaining entries. */
1863 for (; i < 64; i++)
1864 writel(0, ioaddr + 0x104 + i*8);
1865 writew(0x0003, ioaddr + AddrMode);
1866 } else { /* Normal, unicast/broadcast-only mode. */
1867 writew(0x0001, ioaddr + AddrMode);
1868 }
1869}
1870
1871static int check_if_running(struct net_device *dev)
1872{
1873 if (!netif_running(dev))
1874 return -EINVAL;
1875 return 0;
1876}
1877
1878static void hamachi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1879{
1880 struct hamachi_private *np = netdev_priv(dev);
1881 strcpy(info->driver, DRV_NAME);
1882 strcpy(info->version, DRV_VERSION);
1883 strcpy(info->bus_info, pci_name(np->pci_dev));
1884}
1885
1886static int hamachi_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1887{
1888 struct hamachi_private *np = netdev_priv(dev);
1889 spin_lock_irq(&np->lock);
1890 mii_ethtool_gset(&np->mii_if, ecmd);
1891 spin_unlock_irq(&np->lock);
1892 return 0;
1893}
1894
1895static int hamachi_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1896{
1897 struct hamachi_private *np = netdev_priv(dev);
1898 int res;
1899 spin_lock_irq(&np->lock);
1900 res = mii_ethtool_sset(&np->mii_if, ecmd);
1901 spin_unlock_irq(&np->lock);
1902 return res;
1903}
1904
1905static int hamachi_nway_reset(struct net_device *dev)
1906{
1907 struct hamachi_private *np = netdev_priv(dev);
1908 return mii_nway_restart(&np->mii_if);
1909}
1910
1911static u32 hamachi_get_link(struct net_device *dev)
1912{
1913 struct hamachi_private *np = netdev_priv(dev);
1914 return mii_link_ok(&np->mii_if);
1915}
1916
Jeff Garzik7282d492006-09-13 14:30:00 -04001917static const struct ethtool_ops ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 .begin = check_if_running,
1919 .get_drvinfo = hamachi_get_drvinfo,
1920 .get_settings = hamachi_get_settings,
1921 .set_settings = hamachi_set_settings,
1922 .nway_reset = hamachi_nway_reset,
1923 .get_link = hamachi_get_link,
1924};
1925
Jeff Garzik7282d492006-09-13 14:30:00 -04001926static const struct ethtool_ops ethtool_ops_no_mii = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 .begin = check_if_running,
1928 .get_drvinfo = hamachi_get_drvinfo,
1929};
1930
1931static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1932{
1933 struct hamachi_private *np = netdev_priv(dev);
1934 struct mii_ioctl_data *data = if_mii(rq);
1935 int rc;
1936
1937 if (!netif_running(dev))
1938 return -EINVAL;
1939
1940 if (cmd == (SIOCDEVPRIVATE+3)) { /* set rx,tx intr params */
1941 u32 *d = (u32 *)&rq->ifr_ifru;
1942 /* Should add this check here or an ordinary user can do nasty
1943 * things. -KDU
1944 *
1945 * TODO: Shut down the Rx and Tx engines while doing this.
1946 */
1947 if (!capable(CAP_NET_ADMIN))
1948 return -EPERM;
1949 writel(d[0], np->base + TxIntrCtrl);
1950 writel(d[1], np->base + RxIntrCtrl);
1951 printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name,
1952 (u32) readl(np->base + TxIntrCtrl),
1953 (u32) readl(np->base + RxIntrCtrl));
1954 rc = 0;
1955 }
1956
1957 else {
1958 spin_lock_irq(&np->lock);
1959 rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
1960 spin_unlock_irq(&np->lock);
1961 }
1962
1963 return rc;
1964}
1965
1966
1967static void __devexit hamachi_remove_one (struct pci_dev *pdev)
1968{
1969 struct net_device *dev = pci_get_drvdata(pdev);
1970
1971 if (dev) {
1972 struct hamachi_private *hmp = netdev_priv(dev);
1973
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001974 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 hmp->rx_ring_dma);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001976 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 hmp->tx_ring_dma);
1978 unregister_netdev(dev);
1979 iounmap(hmp->base);
1980 free_netdev(dev);
1981 pci_release_regions(pdev);
1982 pci_set_drvdata(pdev, NULL);
1983 }
1984}
1985
1986static struct pci_device_id hamachi_pci_tbl[] = {
1987 { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, },
1988 { 0, }
1989};
1990MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl);
1991
1992static struct pci_driver hamachi_driver = {
1993 .name = DRV_NAME,
1994 .id_table = hamachi_pci_tbl,
1995 .probe = hamachi_init_one,
1996 .remove = __devexit_p(hamachi_remove_one),
1997};
1998
1999static int __init hamachi_init (void)
2000{
2001/* when a module, this is printed whether or not devices are found in probe */
2002#ifdef MODULE
2003 printk(version);
2004#endif
2005 return pci_register_driver(&hamachi_driver);
2006}
2007
2008static void __exit hamachi_exit (void)
2009{
2010 pci_unregister_driver(&hamachi_driver);
2011}
2012
2013
2014module_init(hamachi_init);
2015module_exit(hamachi_exit);