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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)
Al Viro8e985912007-12-10 18:39:29 +0000207#define leXX_to_cpu(addr) le64_to_cpu(addr)
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400208#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209#define cpu_to_leXX(addr) cpu_to_le32(addr)
Al Viro8e985912007-12-10 18:39:29 +0000210#define leXX_to_cpu(addr) le32_to_cpu(addr)
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400211#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213
214/*
215 Theory of Operation
216
217I. Board Compatibility
218
219This device driver is designed for the Packet Engines "Hamachi"
220Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
22166Mhz PCI card.
222
223II. Board-specific settings
224
225No jumpers exist on the board. The chip supports software correction of
226various motherboard wiring errors, however this driver does not support
227that feature.
228
229III. Driver operation
230
231IIIa. Ring buffers
232
233The Hamachi uses a typical descriptor based bus-master architecture.
234The descriptor list is similar to that used by the Digital Tulip.
235This driver uses two statically allocated fixed-size descriptor lists
236formed into rings by a branch from the final descriptor to the beginning of
237the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
238
239This driver uses a zero-copy receive and transmit scheme similar my other
240network drivers.
241The driver allocates full frame size skbuffs for the Rx ring buffers at
242open() time and passes the skb->data field to the Hamachi as receive data
243buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
244a fresh skbuff is allocated and the frame is copied to the new skbuff.
245When the incoming frame is larger, the skbuff is passed directly up the
246protocol stack and replaced by a newly allocated skbuff.
247
248The RX_COPYBREAK value is chosen to trade-off the memory wasted by
249using a full-sized skbuff for small frames vs. the copying costs of larger
250frames. Gigabit cards are typically used on generously configured machines
251and the underfilled buffers have negligible impact compared to the benefit of
252a single allocation size, so the default value of zero results in never
253copying packets.
254
255IIIb/c. Transmit/Receive Structure
256
257The Rx and Tx descriptor structure are straight-forward, with no historical
258baggage that must be explained. Unlike the awkward DBDMA structure, there
259are no unused fields or option bits that had only one allowable setting.
260
261Two details should be noted about the descriptors: The chip supports both 32
262bit and 64 bit address structures, and the length field is overwritten on
263the receive descriptors. The descriptor length is set in the control word
264for each channel. The development driver uses 32 bit addresses only, however
26564 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
266
267IIId. Synchronization
268
269This driver is very similar to my other network drivers.
270The driver runs as two independent, single-threaded flows of control. One
271is the send-packet routine, which enforces single-threaded use by the
272dev->tbusy flag. The other thread is the interrupt handler, which is single
273threaded by the hardware and other software.
274
275The send packet thread has partial control over the Tx ring and 'dev->tbusy'
276flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
277queue slot is empty, it clears the tbusy flag when finished otherwise it sets
278the 'hmp->tx_full' flag.
279
280The interrupt handler has exclusive control over the Rx ring and records stats
281from the Tx ring. After reaping the stats, it marks the Tx queue entry as
282empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
283clears both the tx_full and tbusy flags.
284
285IV. Notes
286
287Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
288
289IVb. References
290
291Hamachi Engineering Design Specification, 5/15/97
292(Note: This version was marked "Confidential".)
293
294IVc. Errata
295
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400296None noted.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298V. Recent Changes
299
Jeff Garzik6aa20a22006-09-13 13:24:59 -040030001/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 to help avoid some stall conditions -- this needs further research.
302
Jeff Garzik6aa20a22006-09-13 13:24:59 -040030301/15/1999 EPK Creation of the hamachi_tx function. This function cleans
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 the Tx ring and is called from hamachi_start_xmit (this used to be
305 called from hamachi_interrupt but it tends to delay execution of the
306 interrupt handler and thus reduce bandwidth by reducing the latency
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400307 between hamachi_rx()'s). Notably, some modification has been made so
308 that the cleaning loop checks only to make sure that the DescOwn bit
309 isn't set in the status flag since the card is not required
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 to set the entire flag to zero after processing.
311
Jeff Garzik6aa20a22006-09-13 13:24:59 -040031201/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 checked before attempting to add a buffer to the ring. If the ring is full
314 an attempt is made to free any dirty buffers and thus find space for
315 the new buffer or the function returns non-zero which should case the
316 scheduler to reschedule the buffer later.
317
Jeff Garzik6aa20a22006-09-13 13:24:59 -040031801/15/1999 EPK Some adjustments were made to the chip initialization.
319 End-to-end flow control should now be fully active and the interrupt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 algorithm vars have been changed. These could probably use further tuning.
321
32201/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
323 set the rx and tx latencies for the Hamachi interrupts. If you're having
324 problems with network stalls, try setting these to higher values.
325 Valid values are 0x00 through 0xff.
326
Jeff Garzik6aa20a22006-09-13 13:24:59 -040032701/15/1999 EPK In general, the overall bandwidth has increased and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 latencies are better (sometimes by a factor of 2). Stalls are rare at
329 this point, however there still appears to be a bug somewhere between the
330 hardware and driver. TCP checksum errors under load also appear to be
331 eliminated at this point.
332
33301/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
334 Rx and Tx rings. This appears to have been affecting whether a particular
335 peer-to-peer connection would hang under high load. I believe the Rx
336 rings was typically getting set correctly, but the Tx ring wasn't getting
337 the DescEndRing bit set during initialization. ??? Does this mean the
338 hamachi card is using the DescEndRing in processing even if a particular
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400339 slot isn't in use -- hypothetically, the card might be searching the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 entire Tx ring for slots with the DescOwn bit set and then processing
341 them. If the DescEndRing bit isn't set, then it might just wander off
342 through memory until it hits a chunk of data with that bit set
343 and then looping back.
344
Jeff Garzik6aa20a22006-09-13 13:24:59 -040034502/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 problem (TxCmd and RxCmd need only to be set when idle or stopped.
347
34802/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400349 (Michel Mueller pointed out the ``permanently busy'' potential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 problem here).
351
Jeff Garzik6aa20a22006-09-13 13:24:59 -040035202/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
35402/23/1999 EPK Verified that the interrupt status field bits for Tx were
355 incorrectly defined and corrected (as per Michel Mueller).
356
35702/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
358 were available before reseting the tbusy and tx_full flags
359 (as per Michel Mueller).
360
36103/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
362
36312/31/1999 KDU Cleaned up assorted things and added Don's code to force
36432 bit.
365
36602/20/2000 KDU Some of the control was just plain odd. Cleaned up the
367hamachi_start_xmit() and hamachi_interrupt() code. There is still some
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400368re-structuring I would like to do.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
37003/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
371parameters on a dual P3-450 setup yielded the new default interrupt
372mitigation parameters. Tx should interrupt VERY infrequently due to
373Eric's scheme. Rx should be more often...
374
37503/13/2000 KDU Added a patch to make the Rx Checksum code interact
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400376nicely with non-linux machines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Jeff Garzik6aa20a22006-09-13 13:24:59 -040037803/13/2000 KDU Experimented with some of the configuration values:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380 -It seems that enabling PCI performance commands for descriptors
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400381 (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
382 performance impact for any of my tests. (ttcp, netpipe, netperf) I will
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 leave them that way until I hear further feedback.
384
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400385 -Increasing the PCI_LATENCY_TIMER to 130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
387 degrade performance. Leaving default at 64 pending further information.
388
Jeff Garzik6aa20a22006-09-13 13:24:59 -040038903/14/2000 KDU Further tuning:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 -adjusted boguscnt in hamachi_rx() to depend on interrupt
392 mitigation parameters chosen.
393
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400394 -Selected a set of interrupt parameters based on some extensive testing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 These may change with more testing.
396
397TO DO:
398
399-Consider borrowing from the acenic driver code to check PCI_COMMAND for
400PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
401that case.
402
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400403-fix the reset procedure. It doesn't quite work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404*/
405
406/* A few values that may be tweaked. */
407/* Size of each temporary Rx buffer, calculated as:
408 * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
409 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400410 * 2 more because we use skb_reserve.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 */
412#define PKT_BUF_SZ 1538
413
414/* For now, this is going to be set to the maximum size of an ethernet
415 * packet. Eventually, we may want to make it a variable that is
416 * related to the MTU
417 */
418#define MAX_FRAME_SIZE 1518
419
420/* The rest of these values should never change. */
421
422static void hamachi_timer(unsigned long data);
423
424enum capability_flags {CanHaveMII=1, };
Arjan van de Venf71e1302006-03-03 21:33:57 -0500425static const struct chip_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 u16 vendor_id, device_id, device_id_mask, pad;
427 const char *name;
428 void (*media_timer)(unsigned long data);
429 int flags;
430} chip_tbl[] = {
431 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
432 {0,},
433};
434
435/* Offsets to the Hamachi registers. Various sizes. */
436enum hamachi_offsets {
437 TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
438 RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
439 PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
440 LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
441 TxChecksum=0x074, RxChecksum=0x076,
442 TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
443 InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
444 EventStatus=0x08C,
445 MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
446 /* See enum MII_offsets below. */
447 MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
448 AddrMode=0x0D0, StationAddr=0x0D2,
449 /* Gigabit AutoNegotiation. */
450 ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
451 ANLinkPartnerAbility=0x0EA,
452 EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
453 FIFOcfg=0x0F8,
454};
455
456/* Offsets to the MII-mode registers. */
457enum MII_offsets {
458 MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
459 MII_Status=0xAE,
460};
461
462/* Bits in the interrupt status/mask registers. */
463enum intr_status_bits {
464 IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
465 IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
466 LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
467
468/* The Hamachi Rx and Tx buffer descriptors. */
469struct hamachi_desc {
Al Viro8e985912007-12-10 18:39:29 +0000470 __le32 status_n_length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471#if ADDRLEN == 64
472 u32 pad;
Al Viro8e985912007-12-10 18:39:29 +0000473 __le64 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474#else
Al Viro8e985912007-12-10 18:39:29 +0000475 __le32 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476#endif
477};
478
479/* Bits in hamachi_desc.status_n_length */
480enum desc_status_bits {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400481 DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 DescIntr=0x10000000,
483};
484
485#define PRIV_ALIGN 15 /* Required alignment mask */
486#define MII_CNT 4
487struct hamachi_private {
488 /* Descriptor rings first for alignment. Tx requires a second descriptor
489 for status. */
490 struct hamachi_desc *rx_ring;
491 struct hamachi_desc *tx_ring;
492 struct sk_buff* rx_skbuff[RX_RING_SIZE];
493 struct sk_buff* tx_skbuff[TX_RING_SIZE];
494 dma_addr_t tx_ring_dma;
495 dma_addr_t rx_ring_dma;
496 struct net_device_stats stats;
497 struct timer_list timer; /* Media selection timer. */
498 /* Frequently used and paired value: keep adjacent for cache effect. */
499 spinlock_t lock;
500 int chip_id;
501 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
502 unsigned int cur_tx, dirty_tx;
503 unsigned int rx_buf_sz; /* Based on MTU+slack. */
504 unsigned int tx_full:1; /* The Tx queue is full. */
505 unsigned int duplex_lock:1;
506 unsigned int default_port:4; /* Last dev->if_port value. */
507 /* MII transceiver section. */
508 int mii_cnt; /* MII device addresses. */
509 struct mii_if_info mii_if; /* MII lib hooks/info */
510 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
511 u32 rx_int_var, tx_int_var; /* interrupt control variables */
512 u32 option; /* Hold on to a copy of the options */
513 struct pci_dev *pci_dev;
514 void __iomem *base;
515};
516
517MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
518MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
519MODULE_LICENSE("GPL");
520
521module_param(max_interrupt_work, int, 0);
522module_param(mtu, int, 0);
523module_param(debug, int, 0);
524module_param(min_rx_pkt, int, 0);
525module_param(max_rx_gap, int, 0);
526module_param(max_rx_latency, int, 0);
527module_param(min_tx_pkt, int, 0);
528module_param(max_tx_gap, int, 0);
529module_param(max_tx_latency, int, 0);
530module_param(rx_copybreak, int, 0);
531module_param_array(rx_params, int, NULL, 0);
532module_param_array(tx_params, int, NULL, 0);
533module_param_array(options, int, NULL, 0);
534module_param_array(full_duplex, int, NULL, 0);
535module_param(force32, int, 0);
536MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt");
537MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)");
538MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)");
539MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts");
540MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
541MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
542MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts");
543MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
544MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
545MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames");
546MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
547MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
548MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
549MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)");
550MODULE_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 -0400551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552static int read_eeprom(void __iomem *ioaddr, int location);
553static int mdio_read(struct net_device *dev, int phy_id, int location);
554static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
555static int hamachi_open(struct net_device *dev);
556static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
557static void hamachi_timer(unsigned long data);
558static void hamachi_tx_timeout(struct net_device *dev);
559static void hamachi_init_ring(struct net_device *dev);
560static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev);
David Howells7d12e782006-10-05 14:55:46 +0100561static irqreturn_t hamachi_interrupt(int irq, void *dev_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562static int hamachi_rx(struct net_device *dev);
563static inline int hamachi_tx(struct net_device *dev);
564static void hamachi_error(struct net_device *dev, int intr_status);
565static int hamachi_close(struct net_device *dev);
566static struct net_device_stats *hamachi_get_stats(struct net_device *dev);
567static void set_rx_mode(struct net_device *dev);
Jeff Garzik7282d492006-09-13 14:30:00 -0400568static const struct ethtool_ops ethtool_ops;
569static const struct ethtool_ops ethtool_ops_no_mii;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
571static int __devinit hamachi_init_one (struct pci_dev *pdev,
572 const struct pci_device_id *ent)
573{
574 struct hamachi_private *hmp;
575 int option, i, rx_int_var, tx_int_var, boguscnt;
576 int chip_id = ent->driver_data;
577 int irq;
578 void __iomem *ioaddr;
579 unsigned long base;
580 static int card_idx;
581 struct net_device *dev;
582 void *ring_space;
583 dma_addr_t ring_dma;
584 int ret = -ENOMEM;
Joe Perches0795af52007-10-03 17:59:30 -0700585 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587/* when built into the kernel, we only print version if device is found */
588#ifndef MODULE
589 static int printed_version;
590 if (!printed_version++)
591 printk(version);
592#endif
593
594 if (pci_enable_device(pdev)) {
595 ret = -EIO;
596 goto err_out;
597 }
598
599 base = pci_resource_start(pdev, 0);
600#ifdef __alpha__ /* Really "64 bit addrs" */
601 base |= (pci_resource_start(pdev, 1) << 32);
602#endif
603
604 pci_set_master(pdev);
605
606 i = pci_request_regions(pdev, DRV_NAME);
Jeff Garzik2e8a5382006-06-27 10:47:51 -0400607 if (i)
608 return i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
610 irq = pdev->irq;
611 ioaddr = ioremap(base, 0x400);
612 if (!ioaddr)
613 goto err_out_release;
614
615 dev = alloc_etherdev(sizeof(struct hamachi_private));
616 if (!dev)
617 goto err_out_iounmap;
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 SET_NETDEV_DEV(dev, &pdev->dev);
620
621#ifdef TX_CHECKSUM
622 printk("check that skbcopy in ip_queue_xmit isn't happening\n");
623 dev->hard_header_len += 8; /* for cksum tag */
624#endif
625
626 for (i = 0; i < 6; i++)
627 dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i)
628 : readb(ioaddr + StationAddr + i);
629
630#if ! defined(final_version)
631 if (hamachi_debug > 4)
632 for (i = 0; i < 0x10; i++)
633 printk("%2.2x%s",
634 read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n");
635#endif
636
637 hmp = netdev_priv(dev);
638 spin_lock_init(&hmp->lock);
639
640 hmp->mii_if.dev = dev;
641 hmp->mii_if.mdio_read = mdio_read;
642 hmp->mii_if.mdio_write = mdio_write;
643 hmp->mii_if.phy_id_mask = 0x1f;
644 hmp->mii_if.reg_num_mask = 0x1f;
645
646 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
647 if (!ring_space)
648 goto err_out_cleardev;
649 hmp->tx_ring = (struct hamachi_desc *)ring_space;
650 hmp->tx_ring_dma = ring_dma;
651
652 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
653 if (!ring_space)
654 goto err_out_unmap_tx;
655 hmp->rx_ring = (struct hamachi_desc *)ring_space;
656 hmp->rx_ring_dma = ring_dma;
657
658 /* Check for options being passed in */
659 option = card_idx < MAX_UNITS ? options[card_idx] : 0;
660 if (dev->mem_start)
661 option = dev->mem_start;
662
663 /* If the bus size is misidentified, do the following. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400664 force32 = force32 ? force32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 );
666 if (force32)
667 writeb(force32, ioaddr + VirtualJumpers);
668
669 /* Hmmm, do we really need to reset the chip???. */
670 writeb(0x01, ioaddr + ChipReset);
671
672 /* After a reset, the clock speed measurement of the PCI bus will not
673 * be valid for a moment. Wait for a little while until it is. If
674 * it takes more than 10ms, forget it.
675 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400676 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 i = readb(ioaddr + PCIClkMeas);
678 for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400679 udelay(10);
680 i = readb(ioaddr + PCIClkMeas);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
682
683 hmp->base = ioaddr;
684 dev->base_addr = (unsigned long)ioaddr;
685 dev->irq = irq;
686 pci_set_drvdata(pdev, dev);
687
688 hmp->chip_id = chip_id;
689 hmp->pci_dev = pdev;
690
691 /* The lower four bits are the media type. */
692 if (option > 0) {
693 hmp->option = option;
694 if (option & 0x200)
695 hmp->mii_if.full_duplex = 1;
696 else if (option & 0x080)
697 hmp->mii_if.full_duplex = 0;
698 hmp->default_port = option & 15;
699 if (hmp->default_port)
700 hmp->mii_if.force_media = 1;
701 }
702 if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
703 hmp->mii_if.full_duplex = 1;
704
705 /* lock the duplex mode if someone specified a value */
706 if (hmp->mii_if.full_duplex || (option & 0x080))
707 hmp->duplex_lock = 1;
708
709 /* Set interrupt tuning parameters */
710 max_rx_latency = max_rx_latency & 0x00ff;
711 max_rx_gap = max_rx_gap & 0x00ff;
712 min_rx_pkt = min_rx_pkt & 0x00ff;
713 max_tx_latency = max_tx_latency & 0x00ff;
714 max_tx_gap = max_tx_gap & 0x00ff;
715 min_tx_pkt = min_tx_pkt & 0x00ff;
716
717 rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1;
718 tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400719 hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400721 hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency);
723
724
725 /* The Hamachi-specific entries in the device structure. */
726 dev->open = &hamachi_open;
727 dev->hard_start_xmit = &hamachi_start_xmit;
728 dev->stop = &hamachi_close;
729 dev->get_stats = &hamachi_get_stats;
730 dev->set_multicast_list = &set_rx_mode;
731 dev->do_ioctl = &netdev_ioctl;
732 if (chip_tbl[hmp->chip_id].flags & CanHaveMII)
733 SET_ETHTOOL_OPS(dev, &ethtool_ops);
734 else
735 SET_ETHTOOL_OPS(dev, &ethtool_ops_no_mii);
736 dev->tx_timeout = &hamachi_tx_timeout;
737 dev->watchdog_timeo = TX_TIMEOUT;
738 if (mtu)
739 dev->mtu = mtu;
740
741 i = register_netdev(dev);
742 if (i) {
743 ret = i;
744 goto err_out_unmap_rx;
745 }
746
Joe Perches0795af52007-10-03 17:59:30 -0700747 printk(KERN_INFO "%s: %s type %x at %p, %s, IRQ %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
Joe Perches0795af52007-10-03 17:59:30 -0700749 ioaddr, print_mac(mac, dev->dev_addr), irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 i = readb(ioaddr + PCIClkMeas);
751 printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
752 "%2.2x, LPA %4.4x.\n",
753 dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
754 i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
755 readw(ioaddr + ANLinkPartnerAbility));
756
757 if (chip_tbl[hmp->chip_id].flags & CanHaveMII) {
758 int phy, phy_idx = 0;
759 for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
760 int mii_status = mdio_read(dev, phy, MII_BMSR);
761 if (mii_status != 0xffff &&
762 mii_status != 0x0000) {
763 hmp->phys[phy_idx++] = phy;
764 hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
765 printk(KERN_INFO "%s: MII PHY found at address %d, status "
766 "0x%4.4x advertising %4.4x.\n",
767 dev->name, phy, mii_status, hmp->mii_if.advertising);
768 }
769 }
770 hmp->mii_cnt = phy_idx;
771 if (hmp->mii_cnt > 0)
772 hmp->mii_if.phy_id = hmp->phys[0];
773 else
774 memset(&hmp->mii_if, 0, sizeof(hmp->mii_if));
775 }
776 /* Configure gigabit autonegotiation. */
777 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
778 writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */
779 writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */
780
781 card_idx++;
782 return 0;
783
784err_out_unmap_rx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400785 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 hmp->rx_ring_dma);
787err_out_unmap_tx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400788 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 hmp->tx_ring_dma);
790err_out_cleardev:
791 free_netdev (dev);
792err_out_iounmap:
793 iounmap(ioaddr);
794err_out_release:
795 pci_release_regions(pdev);
796err_out:
797 return ret;
798}
799
800static int __devinit read_eeprom(void __iomem *ioaddr, int location)
801{
802 int bogus_cnt = 1000;
803
804 /* We should check busy first - per docs -KDU */
805 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
806 writew(location, ioaddr + EEAddr);
807 writeb(0x02, ioaddr + EECmdStatus);
808 bogus_cnt = 1000;
809 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
810 if (hamachi_debug > 5)
811 printk(" EEPROM status is %2.2x after %d ticks.\n",
812 (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
813 return readb(ioaddr + EEData);
814}
815
816/* MII Managemen Data I/O accesses.
817 These routines assume the MDIO controller is idle, and do not exit until
818 the command is finished. */
819
820static int mdio_read(struct net_device *dev, int phy_id, int location)
821{
822 struct hamachi_private *hmp = netdev_priv(dev);
823 void __iomem *ioaddr = hmp->base;
824 int i;
825
826 /* We should check busy first - per docs -KDU */
827 for (i = 10000; i >= 0; i--)
828 if ((readw(ioaddr + MII_Status) & 1) == 0)
829 break;
830 writew((phy_id<<8) + location, ioaddr + MII_Addr);
831 writew(0x0001, ioaddr + MII_Cmd);
832 for (i = 10000; i >= 0; i--)
833 if ((readw(ioaddr + MII_Status) & 1) == 0)
834 break;
835 return readw(ioaddr + MII_Rd_Data);
836}
837
838static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
839{
840 struct hamachi_private *hmp = netdev_priv(dev);
841 void __iomem *ioaddr = hmp->base;
842 int i;
843
844 /* We should check busy first - per docs -KDU */
845 for (i = 10000; i >= 0; i--)
846 if ((readw(ioaddr + MII_Status) & 1) == 0)
847 break;
848 writew((phy_id<<8) + location, ioaddr + MII_Addr);
849 writew(value, ioaddr + MII_Wr_Data);
850
851 /* Wait for the command to finish. */
852 for (i = 10000; i >= 0; i--)
853 if ((readw(ioaddr + MII_Status) & 1) == 0)
854 break;
855 return;
856}
857
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859static int hamachi_open(struct net_device *dev)
860{
861 struct hamachi_private *hmp = netdev_priv(dev);
862 void __iomem *ioaddr = hmp->base;
863 int i;
864 u32 rx_int_var, tx_int_var;
865 u16 fifo_info;
866
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700867 i = request_irq(dev->irq, &hamachi_interrupt, IRQF_SHARED, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 if (i)
869 return i;
870
871 if (hamachi_debug > 1)
872 printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
873 dev->name, dev->irq);
874
875 hamachi_init_ring(dev);
876
877#if ADDRLEN == 64
878 /* writellll anyone ? */
Al Viro8e985912007-12-10 18:39:29 +0000879 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
880 writel(hmp->rx_ring_dma >> 32, ioaddr + RxPtr + 4);
881 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
882 writel(hmp->tx_ring_dma >> 32, ioaddr + TxPtr + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883#else
Al Viro8e985912007-12-10 18:39:29 +0000884 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
885 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886#endif
887
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400888 /* TODO: It would make sense to organize this as words since the card
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 * documentation does. -KDU
890 */
891 for (i = 0; i < 6; i++)
892 writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
893
894 /* Initialize other registers: with so many this eventually this will
895 converted to an offset/value list. */
896
897 /* Configure the FIFO */
898 fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
899 switch (fifo_info){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400900 case 0 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 /* No FIFO */
902 writew(0x0000, ioaddr + FIFOcfg);
903 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400904 case 1 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 /* Configure the FIFO for 512K external, 16K used for Tx. */
906 writew(0x0028, ioaddr + FIFOcfg);
907 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400908 case 2 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 /* Configure the FIFO for 1024 external, 32K used for Tx. */
910 writew(0x004C, ioaddr + FIFOcfg);
911 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400912 case 3 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 /* Configure the FIFO for 2048 external, 32K used for Tx. */
914 writew(0x006C, ioaddr + FIFOcfg);
915 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400916 default :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 printk(KERN_WARNING "%s: Unsupported external memory config!\n",
918 dev->name);
919 /* Default to no FIFO */
920 writew(0x0000, ioaddr + FIFOcfg);
921 break;
922 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 if (dev->if_port == 0)
925 dev->if_port = hmp->default_port;
926
927
928 /* Setting the Rx mode will start the Rx process. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400929 /* If someone didn't choose a duplex, default to full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 if (hmp->duplex_lock != 1)
931 hmp->mii_if.full_duplex = 1;
932
933 /* always 1, takes no more time to do it */
934 writew(0x0001, ioaddr + RxChecksum);
935#ifdef TX_CHECKSUM
936 writew(0x0001, ioaddr + TxChecksum);
937#else
938 writew(0x0000, ioaddr + TxChecksum);
939#endif
940 writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
941 writew(0x215F, ioaddr + MACCnfg);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400942 writew(0x000C, ioaddr + FrameGap0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
944 writew(0x1018, ioaddr + FrameGap1);
945 /* Why do we enable receives/transmits here? -KDU */
946 writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
947 /* Enable automatic generation of flow control frames, period 0xffff. */
948 writel(0x0030FFFF, ioaddr + FlowCtrl);
949 writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
950
951 /* Enable legacy links. */
952 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
953 /* Initial Link LED to blinking red. */
954 writeb(0x03, ioaddr + LEDCtrl);
955
956 /* Configure interrupt mitigation. This has a great effect on
957 performance, so systems tuning should start here!. */
958
959 rx_int_var = hmp->rx_int_var;
960 tx_int_var = hmp->tx_int_var;
961
962 if (hamachi_debug > 1) {
963 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400964 tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 (tx_int_var & 0x00ff0000) >> 16);
966 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400967 rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 (rx_int_var & 0x00ff0000) >> 16);
969 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
970 }
971
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400972 writel(tx_int_var, ioaddr + TxIntrCtrl);
973 writel(rx_int_var, ioaddr + RxIntrCtrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
975 set_rx_mode(dev);
976
977 netif_start_queue(dev);
978
979 /* Enable interrupts by setting the interrupt mask. */
980 writel(0x80878787, ioaddr + InterruptEnable);
981 writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
982
983 /* Configure and start the DMA channels. */
984 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
985#if ADDRLEN == 64
986 writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
987 writew(0x005D, ioaddr + TxDMACtrl);
988#else
989 writew(0x001D, ioaddr + RxDMACtrl);
990 writew(0x001D, ioaddr + TxDMACtrl);
991#endif
992 writew(0x0001, ioaddr + RxCmd);
993
994 if (hamachi_debug > 2) {
995 printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
996 dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
997 }
998 /* Set the timer to check for link beat. */
999 init_timer(&hmp->timer);
1000 hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
1001 hmp->timer.data = (unsigned long)dev;
1002 hmp->timer.function = &hamachi_timer; /* timer handler */
1003 add_timer(&hmp->timer);
1004
1005 return 0;
1006}
1007
1008static inline int hamachi_tx(struct net_device *dev)
1009{
1010 struct hamachi_private *hmp = netdev_priv(dev);
1011
1012 /* Update the dirty pointer until we find an entry that is
1013 still owned by the card */
1014 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
1015 int entry = hmp->dirty_tx % TX_RING_SIZE;
1016 struct sk_buff *skb;
1017
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001018 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 break;
1020 /* Free the original skb. */
1021 skb = hmp->tx_skbuff[entry];
Stephen Hemmingerddfce6b2007-10-05 17:19:47 -07001022 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001023 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001024 leXX_to_cpu(hmp->tx_ring[entry].addr),
1025 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 dev_kfree_skb(skb);
1027 hmp->tx_skbuff[entry] = NULL;
1028 }
1029 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001030 if (entry >= TX_RING_SIZE-1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001032 cpu_to_le32(DescEndRing);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 hmp->stats.tx_packets++;
1034 }
1035
1036 return 0;
1037}
1038
1039static void hamachi_timer(unsigned long data)
1040{
1041 struct net_device *dev = (struct net_device *)data;
1042 struct hamachi_private *hmp = netdev_priv(dev);
1043 void __iomem *ioaddr = hmp->base;
1044 int next_tick = 10*HZ;
1045
1046 if (hamachi_debug > 2) {
1047 printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
1048 "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
1049 readw(ioaddr + ANLinkPartnerAbility));
1050 printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1051 "%4.4x %4.4x %4.4x.\n", dev->name,
1052 readw(ioaddr + 0x0e0),
1053 readw(ioaddr + 0x0e2),
1054 readw(ioaddr + 0x0e4),
1055 readw(ioaddr + 0x0e6),
1056 readw(ioaddr + 0x0e8),
1057 readw(ioaddr + 0x0eA));
1058 }
1059 /* We could do something here... nah. */
1060 hmp->timer.expires = RUN_AT(next_tick);
1061 add_timer(&hmp->timer);
1062}
1063
1064static void hamachi_tx_timeout(struct net_device *dev)
1065{
1066 int i;
1067 struct hamachi_private *hmp = netdev_priv(dev);
1068 void __iomem *ioaddr = hmp->base;
1069
1070 printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
1071 " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
1072
1073 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
1075 for (i = 0; i < RX_RING_SIZE; i++)
Al Viro8e985912007-12-10 18:39:29 +00001076 printk(" %8.8x", le32_to_cpu(hmp->rx_ring[i].status_n_length));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 printk("\n"KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
1078 for (i = 0; i < TX_RING_SIZE; i++)
Al Viro8e985912007-12-10 18:39:29 +00001079 printk(" %4.4x", le32_to_cpu(hmp->tx_ring[i].status_n_length));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 printk("\n");
1081 }
1082
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001083 /* Reinit the hardware and make sure the Rx and Tx processes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 are up and running.
1085 */
1086 dev->if_port = 0;
1087 /* The right way to do Reset. -KDU
1088 * -Clear OWN bit in all Rx/Tx descriptors
1089 * -Wait 50 uS for channels to go idle
1090 * -Turn off MAC receiver
1091 * -Issue Reset
1092 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 for (i = 0; i < RX_RING_SIZE; i++)
1095 hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
1096
1097 /* Presume that all packets in the Tx queue are gone if we have to
1098 * re-init the hardware.
1099 */
1100 for (i = 0; i < TX_RING_SIZE; i++){
1101 struct sk_buff *skb;
1102
1103 if (i >= TX_RING_SIZE - 1)
Al Viro8e985912007-12-10 18:39:29 +00001104 hmp->tx_ring[i].status_n_length =
1105 cpu_to_le32(DescEndRing) |
1106 (hmp->tx_ring[i].status_n_length &
1107 cpu_to_le32(0x0000ffff));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001108 else
Al Viro8e985912007-12-10 18:39:29 +00001109 hmp->tx_ring[i].status_n_length &= cpu_to_le32(0x0000ffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 skb = hmp->tx_skbuff[i];
1111 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001112 pci_unmap_single(hmp->pci_dev, leXX_to_cpu(hmp->tx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 skb->len, PCI_DMA_TODEVICE);
1114 dev_kfree_skb(skb);
1115 hmp->tx_skbuff[i] = NULL;
1116 }
1117 }
1118
1119 udelay(60); /* Sleep 60 us just for safety sake */
1120 writew(0x0002, ioaddr + RxCmd); /* STOP Rx */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001121
1122 writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
1124 hmp->tx_full = 0;
1125 hmp->cur_rx = hmp->cur_tx = 0;
1126 hmp->dirty_rx = hmp->dirty_tx = 0;
1127 /* Rx packets are also presumed lost; however, we need to make sure a
1128 * ring of buffers is in tact. -KDU
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001129 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 for (i = 0; i < RX_RING_SIZE; i++){
1131 struct sk_buff *skb = hmp->rx_skbuff[i];
1132
1133 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001134 pci_unmap_single(hmp->pci_dev,
1135 leXX_to_cpu(hmp->rx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1137 dev_kfree_skb(skb);
1138 hmp->rx_skbuff[i] = NULL;
1139 }
1140 }
1141 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1142 for (i = 0; i < RX_RING_SIZE; i++) {
1143 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1144 hmp->rx_skbuff[i] = skb;
1145 if (skb == NULL)
1146 break;
1147 skb->dev = dev; /* Mark as being used by this device. */
1148 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001149 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001150 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001151 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
1153 }
1154 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1155 /* Mark the last entry as wrapping the ring. */
1156 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1157
1158 /* Trigger an immediate transmit demand. */
1159 dev->trans_start = jiffies;
1160 hmp->stats.tx_errors++;
1161
1162 /* Restart the chip's Tx/Rx processes . */
1163 writew(0x0002, ioaddr + TxCmd); /* STOP Tx */
1164 writew(0x0001, ioaddr + TxCmd); /* START Tx */
1165 writew(0x0001, ioaddr + RxCmd); /* START Rx */
1166
1167 netif_wake_queue(dev);
1168}
1169
1170
1171/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1172static void hamachi_init_ring(struct net_device *dev)
1173{
1174 struct hamachi_private *hmp = netdev_priv(dev);
1175 int i;
1176
1177 hmp->tx_full = 0;
1178 hmp->cur_rx = hmp->cur_tx = 0;
1179 hmp->dirty_rx = hmp->dirty_tx = 0;
1180
1181#if 0
1182 /* This is wrong. I'm not sure what the original plan was, but this
1183 * is wrong. An MTU of 1 gets you a buffer of 1536, while an MTU
1184 * of 1501 gets a buffer of 1533? -KDU
1185 */
1186 hmp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
1187#endif
1188 /* My attempt at a reasonable correction */
1189 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001190 * card needs room to do 8 byte alignment, +2 so we can reserve
1191 * the first 2 bytes, and +16 gets room for the status word from the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 * card. -KDU
1193 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001194 hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 (((dev->mtu+26+7) & ~7) + 2 + 16));
1196
1197 /* Initialize all Rx descriptors. */
1198 for (i = 0; i < RX_RING_SIZE; i++) {
1199 hmp->rx_ring[i].status_n_length = 0;
1200 hmp->rx_skbuff[i] = NULL;
1201 }
1202 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1203 for (i = 0; i < RX_RING_SIZE; i++) {
1204 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1205 hmp->rx_skbuff[i] = skb;
1206 if (skb == NULL)
1207 break;
1208 skb->dev = dev; /* Mark as being used by this device. */
1209 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001210 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001211 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001213 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
1215 }
1216 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1217 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1218
1219 for (i = 0; i < TX_RING_SIZE; i++) {
1220 hmp->tx_skbuff[i] = NULL;
1221 hmp->tx_ring[i].status_n_length = 0;
1222 }
1223 /* Mark the last entry of the ring */
1224 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1225
1226 return;
1227}
1228
1229
1230#ifdef TX_CHECKSUM
1231#define csum_add(it, val) \
1232do { \
1233 it += (u16) (val); \
1234 if (it & 0xffff0000) { \
1235 it &= 0xffff; \
1236 ++it; \
1237 } \
1238} while (0)
1239 /* printk("add %04x --> %04x\n", val, it); \ */
1240
1241/* uh->len already network format, do not swap */
1242#define pseudo_csum_udp(sum,ih,uh) do { \
1243 sum = 0; \
1244 csum_add(sum, (ih)->saddr >> 16); \
1245 csum_add(sum, (ih)->saddr & 0xffff); \
1246 csum_add(sum, (ih)->daddr >> 16); \
1247 csum_add(sum, (ih)->daddr & 0xffff); \
1248 csum_add(sum, __constant_htons(IPPROTO_UDP)); \
1249 csum_add(sum, (uh)->len); \
1250} while (0)
1251
1252/* swap len */
1253#define pseudo_csum_tcp(sum,ih,len) do { \
1254 sum = 0; \
1255 csum_add(sum, (ih)->saddr >> 16); \
1256 csum_add(sum, (ih)->saddr & 0xffff); \
1257 csum_add(sum, (ih)->daddr >> 16); \
1258 csum_add(sum, (ih)->daddr & 0xffff); \
1259 csum_add(sum, __constant_htons(IPPROTO_TCP)); \
1260 csum_add(sum, htons(len)); \
1261} while (0)
1262#endif
1263
1264static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev)
1265{
1266 struct hamachi_private *hmp = netdev_priv(dev);
1267 unsigned entry;
1268 u16 status;
1269
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001270 /* Ok, now make sure that the queue has space before trying to
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 add another skbuff. if we return non-zero the scheduler
1272 should interpret this as a queue full and requeue the buffer
1273 for later.
1274 */
1275 if (hmp->tx_full) {
1276 /* We should NEVER reach this point -KDU */
1277 printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
1278
1279 /* Wake the potentially-idle transmit channel. */
1280 /* If we don't need to read status, DON'T -KDU */
1281 status=readw(hmp->base + TxStatus);
1282 if( !(status & 0x0001) || (status & 0x0002))
1283 writew(0x0001, hmp->base + TxCmd);
1284 return 1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001285 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286
1287 /* Caution: the write order is important here, set the field
1288 with the "ownership" bits last. */
1289
1290 /* Calculate the next Tx descriptor entry. */
1291 entry = hmp->cur_tx % TX_RING_SIZE;
1292
1293 hmp->tx_skbuff[entry] = skb;
1294
1295#ifdef TX_CHECKSUM
1296 {
1297 /* tack on checksum tag */
1298 u32 tagval = 0;
1299 struct ethhdr *eh = (struct ethhdr *)skb->data;
1300 if (eh->h_proto == __constant_htons(ETH_P_IP)) {
1301 struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
1302 if (ih->protocol == IPPROTO_UDP) {
1303 struct udphdr *uh
1304 = (struct udphdr *)((char *)ih + ih->ihl*4);
1305 u32 offset = ((unsigned char *)uh + 6) - skb->data;
1306 u32 pseudo;
1307 pseudo_csum_udp(pseudo, ih, uh);
1308 pseudo = htons(pseudo);
1309 printk("udp cksum was %04x, sending pseudo %04x\n",
1310 uh->check, pseudo);
1311 uh->check = 0; /* zero out uh->check before card calc */
1312 /*
1313 * start at 14 (skip ethhdr), store at offset (uh->check),
1314 * use pseudo value given.
1315 */
1316 tagval = (14 << 24) | (offset << 16) | pseudo;
1317 } else if (ih->protocol == IPPROTO_TCP) {
1318 printk("tcp, no auto cksum\n");
1319 }
1320 }
1321 *(u32 *)skb_push(skb, 8) = tagval;
1322 }
1323#endif
1324
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001325 hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 skb->data, skb->len, PCI_DMA_TODEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001327
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 /* Hmmmm, could probably put a DescIntr on these, but the way
1329 the driver is currently coded makes Tx interrupts unnecessary
1330 since the clearing of the Tx ring is handled by the start_xmit
1331 routine. This organization helps mitigate the interrupts a
1332 bit and probably renders the max_tx_latency param useless.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001333
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 Update: Putting a DescIntr bit on all of the descriptors and
1335 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1336 */
1337 if (entry >= TX_RING_SIZE-1) /* Wrap ring */
1338 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1339 DescEndPacket | DescEndRing | DescIntr | skb->len);
1340 else
1341 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1342 DescEndPacket | DescIntr | skb->len);
1343 hmp->cur_tx++;
1344
1345 /* Non-x86 Todo: explicitly flush cache lines here. */
1346
1347 /* Wake the potentially-idle transmit channel. */
1348 /* If we don't need to read status, DON'T -KDU */
1349 status=readw(hmp->base + TxStatus);
1350 if( !(status & 0x0001) || (status & 0x0002))
1351 writew(0x0001, hmp->base + TxCmd);
1352
1353 /* Immediately before returning, let's clear as many entries as we can. */
1354 hamachi_tx(dev);
1355
1356 /* We should kick the bottom half here, since we are not accepting
1357 * interrupts with every packet. i.e. realize that Gigabit ethernet
1358 * can transmit faster than ordinary machines can load packets;
1359 * hence, any packet that got put off because we were in the transmit
1360 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1361 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001362 if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 netif_wake_queue(dev); /* Typical path */
1364 else {
1365 hmp->tx_full = 1;
1366 netif_stop_queue(dev);
1367 }
1368 dev->trans_start = jiffies;
1369
1370 if (hamachi_debug > 4) {
1371 printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n",
1372 dev->name, hmp->cur_tx, entry);
1373 }
1374 return 0;
1375}
1376
1377/* The interrupt handler does all of the Rx thread work and cleans up
1378 after the Tx thread. */
David Howells7d12e782006-10-05 14:55:46 +01001379static irqreturn_t hamachi_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380{
1381 struct net_device *dev = dev_instance;
1382 struct hamachi_private *hmp = netdev_priv(dev);
1383 void __iomem *ioaddr = hmp->base;
1384 long boguscnt = max_interrupt_work;
1385 int handled = 0;
1386
1387#ifndef final_version /* Can never occur. */
1388 if (dev == NULL) {
1389 printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
1390 return IRQ_NONE;
1391 }
1392#endif
1393
1394 spin_lock(&hmp->lock);
1395
1396 do {
1397 u32 intr_status = readl(ioaddr + InterruptClear);
1398
1399 if (hamachi_debug > 4)
1400 printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
1401 dev->name, intr_status);
1402
1403 if (intr_status == 0)
1404 break;
1405
1406 handled = 1;
1407
1408 if (intr_status & IntrRxDone)
1409 hamachi_rx(dev);
1410
1411 if (intr_status & IntrTxDone){
1412 /* This code should RARELY need to execute. After all, this is
1413 * a gigabit link, it should consume packets as fast as we put
1414 * them in AND we clear the Tx ring in hamachi_start_xmit().
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001415 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 if (hmp->tx_full){
1417 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){
1418 int entry = hmp->dirty_tx % TX_RING_SIZE;
1419 struct sk_buff *skb;
1420
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001421 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 break;
1423 skb = hmp->tx_skbuff[entry];
1424 /* Free the original skb. */
1425 if (skb){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001426 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001427 leXX_to_cpu(hmp->tx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 skb->len,
1429 PCI_DMA_TODEVICE);
1430 dev_kfree_skb_irq(skb);
1431 hmp->tx_skbuff[entry] = NULL;
1432 }
1433 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001434 if (entry >= TX_RING_SIZE-1)
1435 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 cpu_to_le32(DescEndRing);
1437 hmp->stats.tx_packets++;
1438 }
1439 if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){
1440 /* The ring is no longer full */
1441 hmp->tx_full = 0;
1442 netif_wake_queue(dev);
1443 }
1444 } else {
1445 netif_wake_queue(dev);
1446 }
1447 }
1448
1449
1450 /* Abnormal error summary/uncommon events handlers. */
1451 if (intr_status &
1452 (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
1453 LinkChange | NegotiationChange | StatsMax))
1454 hamachi_error(dev, intr_status);
1455
1456 if (--boguscnt < 0) {
1457 printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n",
1458 dev->name, intr_status);
1459 break;
1460 }
1461 } while (1);
1462
1463 if (hamachi_debug > 3)
1464 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1465 dev->name, readl(ioaddr + IntrStatus));
1466
1467#ifndef final_version
1468 /* Code that should never be run! Perhaps remove after testing.. */
1469 {
1470 static int stopit = 10;
1471 if (dev->start == 0 && --stopit < 0) {
1472 printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
1473 dev->name);
1474 free_irq(irq, dev);
1475 }
1476 }
1477#endif
1478
1479 spin_unlock(&hmp->lock);
1480 return IRQ_RETVAL(handled);
1481}
1482
1483/* This routine is logically part of the interrupt handler, but separated
1484 for clarity and better register allocation. */
1485static int hamachi_rx(struct net_device *dev)
1486{
1487 struct hamachi_private *hmp = netdev_priv(dev);
1488 int entry = hmp->cur_rx % RX_RING_SIZE;
1489 int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx;
1490
1491 if (hamachi_debug > 4) {
1492 printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
1493 entry, hmp->rx_ring[entry].status_n_length);
1494 }
1495
1496 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1497 while (1) {
1498 struct hamachi_desc *desc = &(hmp->rx_ring[entry]);
1499 u32 desc_status = le32_to_cpu(desc->status_n_length);
1500 u16 data_size = desc_status; /* Implicit truncate */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001501 u8 *buf_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 s32 frame_status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001503
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 if (desc_status & DescOwn)
1505 break;
1506 pci_dma_sync_single_for_cpu(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001507 leXX_to_cpu(desc->addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 hmp->rx_buf_sz,
1509 PCI_DMA_FROMDEVICE);
David S. Miller689be432005-06-28 15:25:31 -07001510 buf_addr = (u8 *) hmp->rx_skbuff[entry]->data;
Al Viro8e985912007-12-10 18:39:29 +00001511 frame_status = le32_to_cpu(get_unaligned((__le32*)&(buf_addr[data_size - 12])));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 if (hamachi_debug > 4)
1513 printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n",
1514 frame_status);
1515 if (--boguscnt < 0)
1516 break;
1517 if ( ! (desc_status & DescEndPacket)) {
1518 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1519 "multiple buffers, entry %#x length %d status %4.4x!\n",
1520 dev->name, hmp->cur_rx, data_size, desc_status);
1521 printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
1522 dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
1523 printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1524 dev->name,
Al Viro8e985912007-12-10 18:39:29 +00001525 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0xffff0000,
1526 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0x0000ffff,
1527 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 hmp->stats.rx_length_errors++;
1529 } /* else Omit for prototype errata??? */
1530 if (frame_status & 0x00380000) {
1531 /* There was an error. */
1532 if (hamachi_debug > 2)
1533 printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n",
1534 frame_status);
1535 hmp->stats.rx_errors++;
1536 if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
1537 if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
1538 if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
1539 if (frame_status < 0) hmp->stats.rx_dropped++;
1540 } else {
1541 struct sk_buff *skb;
1542 /* Omit CRC */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001543 u16 pkt_len = (frame_status & 0x07ff) - 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544#ifdef RX_CHECKSUM
1545 u32 pfck = *(u32 *) &buf_addr[data_size - 8];
1546#endif
1547
1548
1549#ifndef final_version
1550 if (hamachi_debug > 4)
1551 printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d"
1552 " of %d, bogus_cnt %d.\n",
1553 pkt_len, data_size, boguscnt);
1554 if (hamachi_debug > 5)
1555 printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1556 dev->name,
1557 *(s32*)&(buf_addr[data_size - 20]),
1558 *(s32*)&(buf_addr[data_size - 16]),
1559 *(s32*)&(buf_addr[data_size - 12]),
1560 *(s32*)&(buf_addr[data_size - 8]),
1561 *(s32*)&(buf_addr[data_size - 4]));
1562#endif
1563 /* Check if the packet is long enough to accept without copying
1564 to a minimally-sized skbuff. */
1565 if (pkt_len < rx_copybreak
1566 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1567#ifdef RX_CHECKSUM
1568 printk(KERN_ERR "%s: rx_copybreak non-zero "
1569 "not good with RX_CHECKSUM\n", dev->name);
1570#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 skb_reserve(skb, 2); /* 16 byte align the IP header */
1572 pci_dma_sync_single_for_cpu(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001573 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 hmp->rx_buf_sz,
1575 PCI_DMA_FROMDEVICE);
1576 /* Call copy + cksum if available. */
1577#if 1 || USE_IP_COPYSUM
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001578 skb_copy_to_linear_data(skb,
1579 hmp->rx_skbuff[entry]->data, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 skb_put(skb, pkt_len);
1581#else
1582 memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma
1583 + entry*sizeof(*desc), pkt_len);
1584#endif
1585 pci_dma_sync_single_for_device(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001586 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 hmp->rx_buf_sz,
1588 PCI_DMA_FROMDEVICE);
1589 } else {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001590 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001591 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1593 skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
1594 hmp->rx_skbuff[entry] = NULL;
1595 }
1596 skb->protocol = eth_type_trans(skb, dev);
1597
1598
1599#ifdef RX_CHECKSUM
1600 /* TCP or UDP on ipv4, DIX encoding */
1601 if (pfck>>24 == 0x91 || pfck>>24 == 0x51) {
1602 struct iphdr *ih = (struct iphdr *) skb->data;
1603 /* Check that IP packet is at least 46 bytes, otherwise,
1604 * there may be pad bytes included in the hardware checksum.
1605 * This wouldn't happen if everyone padded with 0.
1606 */
1607 if (ntohs(ih->tot_len) >= 46){
1608 /* don't worry about frags */
1609 if (!(ih->frag_off & __constant_htons(IP_MF|IP_OFFSET))) {
1610 u32 inv = *(u32 *) &buf_addr[data_size - 16];
1611 u32 *p = (u32 *) &buf_addr[data_size - 20];
1612 register u32 crc, p_r, p_r1;
1613
1614 if (inv & 4) {
1615 inv &= ~4;
1616 --p;
1617 }
1618 p_r = *p;
1619 p_r1 = *(p-1);
1620 switch (inv) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001621 case 0:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 crc = (p_r & 0xffff) + (p_r >> 16);
1623 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001624 case 1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 crc = (p_r >> 16) + (p_r & 0xffff)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001626 + (p_r1 >> 16 & 0xff00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001628 case 2:
1629 crc = p_r + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001631 case 3:
1632 crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 break;
1634 default: /*NOTREACHED*/ crc = 0;
1635 }
1636 if (crc & 0xffff0000) {
1637 crc &= 0xffff;
1638 ++crc;
1639 }
1640 /* tcp/udp will add in pseudo */
1641 skb->csum = ntohs(pfck & 0xffff);
1642 if (skb->csum > crc)
1643 skb->csum -= crc;
1644 else
1645 skb->csum += (~crc & 0xffff);
1646 /*
1647 * could do the pseudo myself and return
1648 * CHECKSUM_UNNECESSARY
1649 */
Patrick McHardy84fa7932006-08-29 16:44:56 -07001650 skb->ip_summed = CHECKSUM_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001652 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 }
1654#endif /* RX_CHECKSUM */
1655
1656 netif_rx(skb);
1657 dev->last_rx = jiffies;
1658 hmp->stats.rx_packets++;
1659 }
1660 entry = (++hmp->cur_rx) % RX_RING_SIZE;
1661 }
1662
1663 /* Refill the Rx ring buffers. */
1664 for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
1665 struct hamachi_desc *desc;
1666
1667 entry = hmp->dirty_rx % RX_RING_SIZE;
1668 desc = &(hmp->rx_ring[entry]);
1669 if (hmp->rx_skbuff[entry] == NULL) {
1670 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1671
1672 hmp->rx_skbuff[entry] = skb;
1673 if (skb == NULL)
1674 break; /* Better luck next round. */
1675 skb->dev = dev; /* Mark as being used by this device. */
1676 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001677 desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001678 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 }
1680 desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
1681 if (entry >= RX_RING_SIZE-1)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001682 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 DescEndPacket | DescEndRing | DescIntr);
1684 else
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001685 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 DescEndPacket | DescIntr);
1687 }
1688
1689 /* Restart Rx engine if stopped. */
1690 /* If we don't need to check status, don't. -KDU */
1691 if (readw(hmp->base + RxStatus) & 0x0002)
1692 writew(0x0001, hmp->base + RxCmd);
1693
1694 return 0;
1695}
1696
1697/* This is more properly named "uncommon interrupt events", as it covers more
1698 than just errors. */
1699static void hamachi_error(struct net_device *dev, int intr_status)
1700{
1701 struct hamachi_private *hmp = netdev_priv(dev);
1702 void __iomem *ioaddr = hmp->base;
1703
1704 if (intr_status & (LinkChange|NegotiationChange)) {
1705 if (hamachi_debug > 1)
1706 printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
1707 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1708 dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
1709 readw(ioaddr + ANLinkPartnerAbility),
1710 readl(ioaddr + IntrStatus));
1711 if (readw(ioaddr + ANStatus) & 0x20)
1712 writeb(0x01, ioaddr + LEDCtrl);
1713 else
1714 writeb(0x03, ioaddr + LEDCtrl);
1715 }
1716 if (intr_status & StatsMax) {
1717 hamachi_get_stats(dev);
1718 /* Read the overflow bits to clear. */
1719 readl(ioaddr + 0x370);
1720 readl(ioaddr + 0x3F0);
1721 }
1722 if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone))
1723 && hamachi_debug)
1724 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
1725 dev->name, intr_status);
1726 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1727 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
1728 hmp->stats.tx_fifo_errors++;
1729 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
1730 hmp->stats.rx_fifo_errors++;
1731}
1732
1733static int hamachi_close(struct net_device *dev)
1734{
1735 struct hamachi_private *hmp = netdev_priv(dev);
1736 void __iomem *ioaddr = hmp->base;
1737 struct sk_buff *skb;
1738 int i;
1739
1740 netif_stop_queue(dev);
1741
1742 if (hamachi_debug > 1) {
1743 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1744 dev->name, readw(ioaddr + TxStatus),
1745 readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
1746 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1747 dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
1748 }
1749
1750 /* Disable interrupts by clearing the interrupt mask. */
1751 writel(0x0000, ioaddr + InterruptEnable);
1752
1753 /* Stop the chip's Tx and Rx processes. */
1754 writel(2, ioaddr + RxCmd);
1755 writew(2, ioaddr + TxCmd);
1756
1757#ifdef __i386__
1758 if (hamachi_debug > 2) {
1759 printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
1760 (int)hmp->tx_ring_dma);
1761 for (i = 0; i < TX_RING_SIZE; i++)
1762 printk(" %c #%d desc. %8.8x %8.8x.\n",
1763 readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
1764 i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
1765 printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
1766 (int)hmp->rx_ring_dma);
1767 for (i = 0; i < RX_RING_SIZE; i++) {
1768 printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
1769 readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
1770 i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
1771 if (hamachi_debug > 6) {
David S. Miller689be432005-06-28 15:25:31 -07001772 if (*(u8*)hmp->rx_skbuff[i]->data != 0x69) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 u16 *addr = (u16 *)
David S. Miller689be432005-06-28 15:25:31 -07001774 hmp->rx_skbuff[i]->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 int j;
1776
1777 for (j = 0; j < 0x50; j++)
1778 printk(" %4.4x", addr[j]);
1779 printk("\n");
1780 }
1781 }
1782 }
1783 }
1784#endif /* __i386__ debugging only */
1785
1786 free_irq(dev->irq, dev);
1787
1788 del_timer_sync(&hmp->timer);
1789
1790 /* Free all the skbuffs in the Rx queue. */
1791 for (i = 0; i < RX_RING_SIZE; i++) {
1792 skb = hmp->rx_skbuff[i];
1793 hmp->rx_ring[i].status_n_length = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001795 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001796 leXX_to_cpu(hmp->rx_ring[i].addr),
1797 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 dev_kfree_skb(skb);
1799 hmp->rx_skbuff[i] = NULL;
1800 }
Al Viro8e985912007-12-10 18:39:29 +00001801 hmp->rx_ring[i].addr = cpu_to_leXX(0xBADF00D0); /* An invalid address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 }
1803 for (i = 0; i < TX_RING_SIZE; i++) {
1804 skb = hmp->tx_skbuff[i];
1805 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001806 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001807 leXX_to_cpu(hmp->tx_ring[i].addr),
1808 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 dev_kfree_skb(skb);
1810 hmp->tx_skbuff[i] = NULL;
1811 }
1812 }
1813
1814 writeb(0x00, ioaddr + LEDCtrl);
1815
1816 return 0;
1817}
1818
1819static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
1820{
1821 struct hamachi_private *hmp = netdev_priv(dev);
1822 void __iomem *ioaddr = hmp->base;
1823
1824 /* We should lock this segment of code for SMP eventually, although
1825 the vulnerability window is very small and statistics are
1826 non-critical. */
1827 /* Ok, what goes here? This appears to be stuck at 21 packets
1828 according to ifconfig. It does get incremented in hamachi_tx(),
1829 so I think I'll comment it out here and see if better things
1830 happen.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001831 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1833
1834 hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
1835 hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
1836 hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
1837
1838 hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
1839 hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
1840 hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
1841 hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
1842 hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
1843
1844 return &hmp->stats;
1845}
1846
1847static void set_rx_mode(struct net_device *dev)
1848{
1849 struct hamachi_private *hmp = netdev_priv(dev);
1850 void __iomem *ioaddr = hmp->base;
1851
1852 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 writew(0x000F, ioaddr + AddrMode);
1854 } else if ((dev->mc_count > 63) || (dev->flags & IFF_ALLMULTI)) {
1855 /* Too many to match, or accept all multicasts. */
1856 writew(0x000B, ioaddr + AddrMode);
1857 } else if (dev->mc_count > 0) { /* Must use the CAM filter. */
1858 struct dev_mc_list *mclist;
1859 int i;
1860 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1861 i++, mclist = mclist->next) {
1862 writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
1863 writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
1864 ioaddr + 0x104 + i*8);
1865 }
1866 /* Clear remaining entries. */
1867 for (; i < 64; i++)
1868 writel(0, ioaddr + 0x104 + i*8);
1869 writew(0x0003, ioaddr + AddrMode);
1870 } else { /* Normal, unicast/broadcast-only mode. */
1871 writew(0x0001, ioaddr + AddrMode);
1872 }
1873}
1874
1875static int check_if_running(struct net_device *dev)
1876{
1877 if (!netif_running(dev))
1878 return -EINVAL;
1879 return 0;
1880}
1881
1882static void hamachi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1883{
1884 struct hamachi_private *np = netdev_priv(dev);
1885 strcpy(info->driver, DRV_NAME);
1886 strcpy(info->version, DRV_VERSION);
1887 strcpy(info->bus_info, pci_name(np->pci_dev));
1888}
1889
1890static int hamachi_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1891{
1892 struct hamachi_private *np = netdev_priv(dev);
1893 spin_lock_irq(&np->lock);
1894 mii_ethtool_gset(&np->mii_if, ecmd);
1895 spin_unlock_irq(&np->lock);
1896 return 0;
1897}
1898
1899static int hamachi_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1900{
1901 struct hamachi_private *np = netdev_priv(dev);
1902 int res;
1903 spin_lock_irq(&np->lock);
1904 res = mii_ethtool_sset(&np->mii_if, ecmd);
1905 spin_unlock_irq(&np->lock);
1906 return res;
1907}
1908
1909static int hamachi_nway_reset(struct net_device *dev)
1910{
1911 struct hamachi_private *np = netdev_priv(dev);
1912 return mii_nway_restart(&np->mii_if);
1913}
1914
1915static u32 hamachi_get_link(struct net_device *dev)
1916{
1917 struct hamachi_private *np = netdev_priv(dev);
1918 return mii_link_ok(&np->mii_if);
1919}
1920
Jeff Garzik7282d492006-09-13 14:30:00 -04001921static const struct ethtool_ops ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 .begin = check_if_running,
1923 .get_drvinfo = hamachi_get_drvinfo,
1924 .get_settings = hamachi_get_settings,
1925 .set_settings = hamachi_set_settings,
1926 .nway_reset = hamachi_nway_reset,
1927 .get_link = hamachi_get_link,
1928};
1929
Jeff Garzik7282d492006-09-13 14:30:00 -04001930static const struct ethtool_ops ethtool_ops_no_mii = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 .begin = check_if_running,
1932 .get_drvinfo = hamachi_get_drvinfo,
1933};
1934
1935static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1936{
1937 struct hamachi_private *np = netdev_priv(dev);
1938 struct mii_ioctl_data *data = if_mii(rq);
1939 int rc;
1940
1941 if (!netif_running(dev))
1942 return -EINVAL;
1943
1944 if (cmd == (SIOCDEVPRIVATE+3)) { /* set rx,tx intr params */
1945 u32 *d = (u32 *)&rq->ifr_ifru;
1946 /* Should add this check here or an ordinary user can do nasty
1947 * things. -KDU
1948 *
1949 * TODO: Shut down the Rx and Tx engines while doing this.
1950 */
1951 if (!capable(CAP_NET_ADMIN))
1952 return -EPERM;
1953 writel(d[0], np->base + TxIntrCtrl);
1954 writel(d[1], np->base + RxIntrCtrl);
1955 printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name,
1956 (u32) readl(np->base + TxIntrCtrl),
1957 (u32) readl(np->base + RxIntrCtrl));
1958 rc = 0;
1959 }
1960
1961 else {
1962 spin_lock_irq(&np->lock);
1963 rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
1964 spin_unlock_irq(&np->lock);
1965 }
1966
1967 return rc;
1968}
1969
1970
1971static void __devexit hamachi_remove_one (struct pci_dev *pdev)
1972{
1973 struct net_device *dev = pci_get_drvdata(pdev);
1974
1975 if (dev) {
1976 struct hamachi_private *hmp = netdev_priv(dev);
1977
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001978 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 hmp->rx_ring_dma);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001980 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 hmp->tx_ring_dma);
1982 unregister_netdev(dev);
1983 iounmap(hmp->base);
1984 free_netdev(dev);
1985 pci_release_regions(pdev);
1986 pci_set_drvdata(pdev, NULL);
1987 }
1988}
1989
1990static struct pci_device_id hamachi_pci_tbl[] = {
1991 { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, },
1992 { 0, }
1993};
1994MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl);
1995
1996static struct pci_driver hamachi_driver = {
1997 .name = DRV_NAME,
1998 .id_table = hamachi_pci_tbl,
1999 .probe = hamachi_init_one,
2000 .remove = __devexit_p(hamachi_remove_one),
2001};
2002
2003static int __init hamachi_init (void)
2004{
2005/* when a module, this is printed whether or not devices are found in probe */
2006#ifdef MODULE
2007 printk(version);
2008#endif
2009 return pci_register_driver(&hamachi_driver);
2010}
2011
2012static void __exit hamachi_exit (void)
2013{
2014 pci_unregister_driver(&hamachi_driver);
2015}
2016
2017
2018module_init(hamachi_init);
2019module_exit(hamachi_exit);