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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
Alexey Dobriyand43c36d2009-10-07 17:09:06 +0400148#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#include <linux/module.h>
150#include <linux/kernel.h>
151#include <linux/string.h>
152#include <linux/timer.h>
153#include <linux/time.h>
154#include <linux/errno.h>
155#include <linux/ioport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156#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
Stephen Hemminger98683952009-02-26 10:19:34 +0000174static const char version[] __devinitconst =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"
Joe Perchesad361c92009-07-06 13:05:40 -0700176" Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
177" Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
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
Eric Dumazet89d71a62009-10-13 05:34:20 +0000409 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 */
Eric Dumazet89d71a62009-10-13 05:34:20 +0000411#define PKT_BUF_SZ 1536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413/* For now, this is going to be set to the maximum size of an ethernet
414 * packet. Eventually, we may want to make it a variable that is
415 * related to the MTU
416 */
417#define MAX_FRAME_SIZE 1518
418
419/* The rest of these values should never change. */
420
421static void hamachi_timer(unsigned long data);
422
423enum capability_flags {CanHaveMII=1, };
Arjan van de Venf71e1302006-03-03 21:33:57 -0500424static const struct chip_info {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 u16 vendor_id, device_id, device_id_mask, pad;
426 const char *name;
427 void (*media_timer)(unsigned long data);
428 int flags;
429} chip_tbl[] = {
430 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
431 {0,},
432};
433
434/* Offsets to the Hamachi registers. Various sizes. */
435enum hamachi_offsets {
436 TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
437 RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
438 PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
439 LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
440 TxChecksum=0x074, RxChecksum=0x076,
441 TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
442 InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
443 EventStatus=0x08C,
444 MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
445 /* See enum MII_offsets below. */
446 MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
447 AddrMode=0x0D0, StationAddr=0x0D2,
448 /* Gigabit AutoNegotiation. */
449 ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
450 ANLinkPartnerAbility=0x0EA,
451 EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
452 FIFOcfg=0x0F8,
453};
454
455/* Offsets to the MII-mode registers. */
456enum MII_offsets {
457 MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
458 MII_Status=0xAE,
459};
460
461/* Bits in the interrupt status/mask registers. */
462enum intr_status_bits {
463 IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
464 IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
465 LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
466
467/* The Hamachi Rx and Tx buffer descriptors. */
468struct hamachi_desc {
Al Viro8e985912007-12-10 18:39:29 +0000469 __le32 status_n_length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470#if ADDRLEN == 64
471 u32 pad;
Al Viro8e985912007-12-10 18:39:29 +0000472 __le64 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473#else
Al Viro8e985912007-12-10 18:39:29 +0000474 __le32 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475#endif
476};
477
478/* Bits in hamachi_desc.status_n_length */
479enum desc_status_bits {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400480 DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 DescIntr=0x10000000,
482};
483
484#define PRIV_ALIGN 15 /* Required alignment mask */
485#define MII_CNT 4
486struct hamachi_private {
487 /* Descriptor rings first for alignment. Tx requires a second descriptor
488 for status. */
489 struct hamachi_desc *rx_ring;
490 struct hamachi_desc *tx_ring;
491 struct sk_buff* rx_skbuff[RX_RING_SIZE];
492 struct sk_buff* tx_skbuff[TX_RING_SIZE];
493 dma_addr_t tx_ring_dma;
494 dma_addr_t rx_ring_dma;
495 struct net_device_stats stats;
496 struct timer_list timer; /* Media selection timer. */
497 /* Frequently used and paired value: keep adjacent for cache effect. */
498 spinlock_t lock;
499 int chip_id;
500 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
501 unsigned int cur_tx, dirty_tx;
502 unsigned int rx_buf_sz; /* Based on MTU+slack. */
503 unsigned int tx_full:1; /* The Tx queue is full. */
504 unsigned int duplex_lock:1;
505 unsigned int default_port:4; /* Last dev->if_port value. */
506 /* MII transceiver section. */
507 int mii_cnt; /* MII device addresses. */
508 struct mii_if_info mii_if; /* MII lib hooks/info */
509 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
510 u32 rx_int_var, tx_int_var; /* interrupt control variables */
511 u32 option; /* Hold on to a copy of the options */
512 struct pci_dev *pci_dev;
513 void __iomem *base;
514};
515
516MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
517MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
518MODULE_LICENSE("GPL");
519
520module_param(max_interrupt_work, int, 0);
521module_param(mtu, int, 0);
522module_param(debug, int, 0);
523module_param(min_rx_pkt, int, 0);
524module_param(max_rx_gap, int, 0);
525module_param(max_rx_latency, int, 0);
526module_param(min_tx_pkt, int, 0);
527module_param(max_tx_gap, int, 0);
528module_param(max_tx_latency, int, 0);
529module_param(rx_copybreak, int, 0);
530module_param_array(rx_params, int, NULL, 0);
531module_param_array(tx_params, int, NULL, 0);
532module_param_array(options, int, NULL, 0);
533module_param_array(full_duplex, int, NULL, 0);
534module_param(force32, int, 0);
535MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt");
536MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)");
537MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)");
538MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts");
539MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
540MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
541MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts");
542MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
543MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
544MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames");
545MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
546MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
547MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
548MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)");
549MODULE_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 -0400550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551static int read_eeprom(void __iomem *ioaddr, int location);
552static int mdio_read(struct net_device *dev, int phy_id, int location);
553static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
554static int hamachi_open(struct net_device *dev);
555static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
556static void hamachi_timer(unsigned long data);
557static void hamachi_tx_timeout(struct net_device *dev);
558static void hamachi_init_ring(struct net_device *dev);
Stephen Hemminger613573252009-08-31 19:50:58 +0000559static netdev_tx_t hamachi_start_xmit(struct sk_buff *skb,
560 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
Stephen Hemmingera8652d22008-11-21 17:36:36 -0800571static const struct net_device_ops hamachi_netdev_ops = {
572 .ndo_open = hamachi_open,
573 .ndo_stop = hamachi_close,
574 .ndo_start_xmit = hamachi_start_xmit,
575 .ndo_get_stats = hamachi_get_stats,
576 .ndo_set_multicast_list = set_rx_mode,
577 .ndo_change_mtu = eth_change_mtu,
578 .ndo_validate_addr = eth_validate_addr,
Stephen Hemmingerfe96aaa2009-01-09 11:13:14 +0000579 .ndo_set_mac_address = eth_mac_addr,
Stephen Hemmingera8652d22008-11-21 17:36:36 -0800580 .ndo_tx_timeout = hamachi_tx_timeout,
581 .ndo_do_ioctl = netdev_ioctl,
582};
583
584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585static int __devinit hamachi_init_one (struct pci_dev *pdev,
586 const struct pci_device_id *ent)
587{
588 struct hamachi_private *hmp;
589 int option, i, rx_int_var, tx_int_var, boguscnt;
590 int chip_id = ent->driver_data;
591 int irq;
592 void __iomem *ioaddr;
593 unsigned long base;
594 static int card_idx;
595 struct net_device *dev;
596 void *ring_space;
597 dma_addr_t ring_dma;
598 int ret = -ENOMEM;
599
600/* when built into the kernel, we only print version if device is found */
601#ifndef MODULE
602 static int printed_version;
603 if (!printed_version++)
604 printk(version);
605#endif
606
607 if (pci_enable_device(pdev)) {
608 ret = -EIO;
609 goto err_out;
610 }
611
612 base = pci_resource_start(pdev, 0);
613#ifdef __alpha__ /* Really "64 bit addrs" */
614 base |= (pci_resource_start(pdev, 1) << 32);
615#endif
616
617 pci_set_master(pdev);
618
619 i = pci_request_regions(pdev, DRV_NAME);
Jeff Garzik2e8a5382006-06-27 10:47:51 -0400620 if (i)
621 return i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623 irq = pdev->irq;
624 ioaddr = ioremap(base, 0x400);
625 if (!ioaddr)
626 goto err_out_release;
627
628 dev = alloc_etherdev(sizeof(struct hamachi_private));
629 if (!dev)
630 goto err_out_iounmap;
631
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 SET_NETDEV_DEV(dev, &pdev->dev);
633
634#ifdef TX_CHECKSUM
635 printk("check that skbcopy in ip_queue_xmit isn't happening\n");
636 dev->hard_header_len += 8; /* for cksum tag */
637#endif
638
639 for (i = 0; i < 6; i++)
640 dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i)
641 : readb(ioaddr + StationAddr + i);
642
643#if ! defined(final_version)
644 if (hamachi_debug > 4)
645 for (i = 0; i < 0x10; i++)
646 printk("%2.2x%s",
647 read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n");
648#endif
649
650 hmp = netdev_priv(dev);
651 spin_lock_init(&hmp->lock);
652
653 hmp->mii_if.dev = dev;
654 hmp->mii_if.mdio_read = mdio_read;
655 hmp->mii_if.mdio_write = mdio_write;
656 hmp->mii_if.phy_id_mask = 0x1f;
657 hmp->mii_if.reg_num_mask = 0x1f;
658
659 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
660 if (!ring_space)
661 goto err_out_cleardev;
662 hmp->tx_ring = (struct hamachi_desc *)ring_space;
663 hmp->tx_ring_dma = ring_dma;
664
665 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
666 if (!ring_space)
667 goto err_out_unmap_tx;
668 hmp->rx_ring = (struct hamachi_desc *)ring_space;
669 hmp->rx_ring_dma = ring_dma;
670
671 /* Check for options being passed in */
672 option = card_idx < MAX_UNITS ? options[card_idx] : 0;
673 if (dev->mem_start)
674 option = dev->mem_start;
675
676 /* If the bus size is misidentified, do the following. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400677 force32 = force32 ? force32 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 );
679 if (force32)
680 writeb(force32, ioaddr + VirtualJumpers);
681
682 /* Hmmm, do we really need to reset the chip???. */
683 writeb(0x01, ioaddr + ChipReset);
684
685 /* After a reset, the clock speed measurement of the PCI bus will not
686 * be valid for a moment. Wait for a little while until it is. If
687 * it takes more than 10ms, forget it.
688 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400689 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 i = readb(ioaddr + PCIClkMeas);
691 for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400692 udelay(10);
693 i = readb(ioaddr + PCIClkMeas);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 }
695
696 hmp->base = ioaddr;
697 dev->base_addr = (unsigned long)ioaddr;
698 dev->irq = irq;
699 pci_set_drvdata(pdev, dev);
700
701 hmp->chip_id = chip_id;
702 hmp->pci_dev = pdev;
703
704 /* The lower four bits are the media type. */
705 if (option > 0) {
706 hmp->option = option;
707 if (option & 0x200)
708 hmp->mii_if.full_duplex = 1;
709 else if (option & 0x080)
710 hmp->mii_if.full_duplex = 0;
711 hmp->default_port = option & 15;
712 if (hmp->default_port)
713 hmp->mii_if.force_media = 1;
714 }
715 if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
716 hmp->mii_if.full_duplex = 1;
717
718 /* lock the duplex mode if someone specified a value */
719 if (hmp->mii_if.full_duplex || (option & 0x080))
720 hmp->duplex_lock = 1;
721
722 /* Set interrupt tuning parameters */
723 max_rx_latency = max_rx_latency & 0x00ff;
724 max_rx_gap = max_rx_gap & 0x00ff;
725 min_rx_pkt = min_rx_pkt & 0x00ff;
726 max_tx_latency = max_tx_latency & 0x00ff;
727 max_tx_gap = max_tx_gap & 0x00ff;
728 min_tx_pkt = min_tx_pkt & 0x00ff;
729
730 rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1;
731 tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400732 hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400734 hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency);
736
737
738 /* The Hamachi-specific entries in the device structure. */
Stephen Hemmingera8652d22008-11-21 17:36:36 -0800739 dev->netdev_ops = &hamachi_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 if (chip_tbl[hmp->chip_id].flags & CanHaveMII)
741 SET_ETHTOOL_OPS(dev, &ethtool_ops);
742 else
743 SET_ETHTOOL_OPS(dev, &ethtool_ops_no_mii);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 dev->watchdog_timeo = TX_TIMEOUT;
745 if (mtu)
746 dev->mtu = mtu;
747
748 i = register_netdev(dev);
749 if (i) {
750 ret = i;
751 goto err_out_unmap_rx;
752 }
753
Johannes Berge1749612008-10-27 15:59:26 -0700754 printk(KERN_INFO "%s: %s type %x at %p, %pM, IRQ %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
Johannes Berge1749612008-10-27 15:59:26 -0700756 ioaddr, dev->dev_addr, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 i = readb(ioaddr + PCIClkMeas);
758 printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
759 "%2.2x, LPA %4.4x.\n",
760 dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
761 i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
762 readw(ioaddr + ANLinkPartnerAbility));
763
764 if (chip_tbl[hmp->chip_id].flags & CanHaveMII) {
765 int phy, phy_idx = 0;
766 for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
767 int mii_status = mdio_read(dev, phy, MII_BMSR);
768 if (mii_status != 0xffff &&
769 mii_status != 0x0000) {
770 hmp->phys[phy_idx++] = phy;
771 hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
772 printk(KERN_INFO "%s: MII PHY found at address %d, status "
773 "0x%4.4x advertising %4.4x.\n",
774 dev->name, phy, mii_status, hmp->mii_if.advertising);
775 }
776 }
777 hmp->mii_cnt = phy_idx;
778 if (hmp->mii_cnt > 0)
779 hmp->mii_if.phy_id = hmp->phys[0];
780 else
781 memset(&hmp->mii_if, 0, sizeof(hmp->mii_if));
782 }
783 /* Configure gigabit autonegotiation. */
784 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
785 writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */
786 writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */
787
788 card_idx++;
789 return 0;
790
791err_out_unmap_rx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400792 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 hmp->rx_ring_dma);
794err_out_unmap_tx:
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400795 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 hmp->tx_ring_dma);
797err_out_cleardev:
798 free_netdev (dev);
799err_out_iounmap:
800 iounmap(ioaddr);
801err_out_release:
802 pci_release_regions(pdev);
803err_out:
804 return ret;
805}
806
807static int __devinit read_eeprom(void __iomem *ioaddr, int location)
808{
809 int bogus_cnt = 1000;
810
811 /* We should check busy first - per docs -KDU */
812 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
813 writew(location, ioaddr + EEAddr);
814 writeb(0x02, ioaddr + EECmdStatus);
815 bogus_cnt = 1000;
816 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
817 if (hamachi_debug > 5)
818 printk(" EEPROM status is %2.2x after %d ticks.\n",
819 (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
820 return readb(ioaddr + EEData);
821}
822
823/* MII Managemen Data I/O accesses.
824 These routines assume the MDIO controller is idle, and do not exit until
825 the command is finished. */
826
827static int mdio_read(struct net_device *dev, int phy_id, int location)
828{
829 struct hamachi_private *hmp = netdev_priv(dev);
830 void __iomem *ioaddr = hmp->base;
831 int i;
832
833 /* We should check busy first - per docs -KDU */
834 for (i = 10000; i >= 0; i--)
835 if ((readw(ioaddr + MII_Status) & 1) == 0)
836 break;
837 writew((phy_id<<8) + location, ioaddr + MII_Addr);
838 writew(0x0001, ioaddr + MII_Cmd);
839 for (i = 10000; i >= 0; i--)
840 if ((readw(ioaddr + MII_Status) & 1) == 0)
841 break;
842 return readw(ioaddr + MII_Rd_Data);
843}
844
845static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
846{
847 struct hamachi_private *hmp = netdev_priv(dev);
848 void __iomem *ioaddr = hmp->base;
849 int i;
850
851 /* We should check busy first - per docs -KDU */
852 for (i = 10000; i >= 0; i--)
853 if ((readw(ioaddr + MII_Status) & 1) == 0)
854 break;
855 writew((phy_id<<8) + location, ioaddr + MII_Addr);
856 writew(value, ioaddr + MII_Wr_Data);
857
858 /* Wait for the command to finish. */
859 for (i = 10000; i >= 0; i--)
860 if ((readw(ioaddr + MII_Status) & 1) == 0)
861 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862}
863
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865static int hamachi_open(struct net_device *dev)
866{
867 struct hamachi_private *hmp = netdev_priv(dev);
868 void __iomem *ioaddr = hmp->base;
869 int i;
870 u32 rx_int_var, tx_int_var;
871 u16 fifo_info;
872
Joe Perchesa0607fd2009-11-18 23:29:17 -0800873 i = request_irq(dev->irq, hamachi_interrupt, IRQF_SHARED, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 if (i)
875 return i;
876
877 if (hamachi_debug > 1)
878 printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
879 dev->name, dev->irq);
880
881 hamachi_init_ring(dev);
882
883#if ADDRLEN == 64
884 /* writellll anyone ? */
Al Viro8e985912007-12-10 18:39:29 +0000885 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
886 writel(hmp->rx_ring_dma >> 32, ioaddr + RxPtr + 4);
887 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
888 writel(hmp->tx_ring_dma >> 32, ioaddr + TxPtr + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889#else
Al Viro8e985912007-12-10 18:39:29 +0000890 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
891 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892#endif
893
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400894 /* TODO: It would make sense to organize this as words since the card
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 * documentation does. -KDU
896 */
897 for (i = 0; i < 6; i++)
898 writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
899
900 /* Initialize other registers: with so many this eventually this will
901 converted to an offset/value list. */
902
903 /* Configure the FIFO */
904 fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
905 switch (fifo_info){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400906 case 0 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 /* No FIFO */
908 writew(0x0000, ioaddr + FIFOcfg);
909 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400910 case 1 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 /* Configure the FIFO for 512K external, 16K used for Tx. */
912 writew(0x0028, ioaddr + FIFOcfg);
913 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400914 case 2 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 /* Configure the FIFO for 1024 external, 32K used for Tx. */
916 writew(0x004C, ioaddr + FIFOcfg);
917 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400918 case 3 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 /* Configure the FIFO for 2048 external, 32K used for Tx. */
920 writew(0x006C, ioaddr + FIFOcfg);
921 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400922 default :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 printk(KERN_WARNING "%s: Unsupported external memory config!\n",
924 dev->name);
925 /* Default to no FIFO */
926 writew(0x0000, ioaddr + FIFOcfg);
927 break;
928 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 if (dev->if_port == 0)
931 dev->if_port = hmp->default_port;
932
933
934 /* Setting the Rx mode will start the Rx process. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400935 /* If someone didn't choose a duplex, default to full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (hmp->duplex_lock != 1)
937 hmp->mii_if.full_duplex = 1;
938
939 /* always 1, takes no more time to do it */
940 writew(0x0001, ioaddr + RxChecksum);
941#ifdef TX_CHECKSUM
942 writew(0x0001, ioaddr + TxChecksum);
943#else
944 writew(0x0000, ioaddr + TxChecksum);
945#endif
946 writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
947 writew(0x215F, ioaddr + MACCnfg);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400948 writew(0x000C, ioaddr + FrameGap0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
950 writew(0x1018, ioaddr + FrameGap1);
951 /* Why do we enable receives/transmits here? -KDU */
952 writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
953 /* Enable automatic generation of flow control frames, period 0xffff. */
954 writel(0x0030FFFF, ioaddr + FlowCtrl);
955 writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
956
957 /* Enable legacy links. */
958 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
959 /* Initial Link LED to blinking red. */
960 writeb(0x03, ioaddr + LEDCtrl);
961
962 /* Configure interrupt mitigation. This has a great effect on
963 performance, so systems tuning should start here!. */
964
965 rx_int_var = hmp->rx_int_var;
966 tx_int_var = hmp->tx_int_var;
967
968 if (hamachi_debug > 1) {
969 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400970 tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 (tx_int_var & 0x00ff0000) >> 16);
972 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400973 rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 (rx_int_var & 0x00ff0000) >> 16);
975 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
976 }
977
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400978 writel(tx_int_var, ioaddr + TxIntrCtrl);
979 writel(rx_int_var, ioaddr + RxIntrCtrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
981 set_rx_mode(dev);
982
983 netif_start_queue(dev);
984
985 /* Enable interrupts by setting the interrupt mask. */
986 writel(0x80878787, ioaddr + InterruptEnable);
987 writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
988
989 /* Configure and start the DMA channels. */
990 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
991#if ADDRLEN == 64
992 writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
993 writew(0x005D, ioaddr + TxDMACtrl);
994#else
995 writew(0x001D, ioaddr + RxDMACtrl);
996 writew(0x001D, ioaddr + TxDMACtrl);
997#endif
998 writew(0x0001, ioaddr + RxCmd);
999
1000 if (hamachi_debug > 2) {
1001 printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
1002 dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
1003 }
1004 /* Set the timer to check for link beat. */
1005 init_timer(&hmp->timer);
1006 hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
1007 hmp->timer.data = (unsigned long)dev;
1008 hmp->timer.function = &hamachi_timer; /* timer handler */
1009 add_timer(&hmp->timer);
1010
1011 return 0;
1012}
1013
1014static inline int hamachi_tx(struct net_device *dev)
1015{
1016 struct hamachi_private *hmp = netdev_priv(dev);
1017
1018 /* Update the dirty pointer until we find an entry that is
1019 still owned by the card */
1020 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
1021 int entry = hmp->dirty_tx % TX_RING_SIZE;
1022 struct sk_buff *skb;
1023
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001024 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 break;
1026 /* Free the original skb. */
1027 skb = hmp->tx_skbuff[entry];
Stephen Hemmingerddfce6b2007-10-05 17:19:47 -07001028 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001029 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001030 leXX_to_cpu(hmp->tx_ring[entry].addr),
1031 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 dev_kfree_skb(skb);
1033 hmp->tx_skbuff[entry] = NULL;
1034 }
1035 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001036 if (entry >= TX_RING_SIZE-1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001038 cpu_to_le32(DescEndRing);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 hmp->stats.tx_packets++;
1040 }
1041
1042 return 0;
1043}
1044
1045static void hamachi_timer(unsigned long data)
1046{
1047 struct net_device *dev = (struct net_device *)data;
1048 struct hamachi_private *hmp = netdev_priv(dev);
1049 void __iomem *ioaddr = hmp->base;
1050 int next_tick = 10*HZ;
1051
1052 if (hamachi_debug > 2) {
1053 printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
1054 "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
1055 readw(ioaddr + ANLinkPartnerAbility));
1056 printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1057 "%4.4x %4.4x %4.4x.\n", dev->name,
1058 readw(ioaddr + 0x0e0),
1059 readw(ioaddr + 0x0e2),
1060 readw(ioaddr + 0x0e4),
1061 readw(ioaddr + 0x0e6),
1062 readw(ioaddr + 0x0e8),
1063 readw(ioaddr + 0x0eA));
1064 }
1065 /* We could do something here... nah. */
1066 hmp->timer.expires = RUN_AT(next_tick);
1067 add_timer(&hmp->timer);
1068}
1069
1070static void hamachi_tx_timeout(struct net_device *dev)
1071{
1072 int i;
1073 struct hamachi_private *hmp = netdev_priv(dev);
1074 void __iomem *ioaddr = hmp->base;
1075
1076 printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
1077 " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
1078
1079 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
1081 for (i = 0; i < RX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001082 printk(KERN_CONT " %8.8x",
1083 le32_to_cpu(hmp->rx_ring[i].status_n_length));
1084 printk(KERN_CONT "\n");
1085 printk(KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 for (i = 0; i < TX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001087 printk(KERN_CONT " %4.4x",
1088 le32_to_cpu(hmp->tx_ring[i].status_n_length));
1089 printk(KERN_CONT "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 }
1091
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001092 /* Reinit the hardware and make sure the Rx and Tx processes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 are up and running.
1094 */
1095 dev->if_port = 0;
1096 /* The right way to do Reset. -KDU
1097 * -Clear OWN bit in all Rx/Tx descriptors
1098 * -Wait 50 uS for channels to go idle
1099 * -Turn off MAC receiver
1100 * -Issue Reset
1101 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001102
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 for (i = 0; i < RX_RING_SIZE; i++)
1104 hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
1105
1106 /* Presume that all packets in the Tx queue are gone if we have to
1107 * re-init the hardware.
1108 */
1109 for (i = 0; i < TX_RING_SIZE; i++){
1110 struct sk_buff *skb;
1111
1112 if (i >= TX_RING_SIZE - 1)
Al Viro8e985912007-12-10 18:39:29 +00001113 hmp->tx_ring[i].status_n_length =
1114 cpu_to_le32(DescEndRing) |
1115 (hmp->tx_ring[i].status_n_length &
1116 cpu_to_le32(0x0000ffff));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001117 else
Al Viro8e985912007-12-10 18:39:29 +00001118 hmp->tx_ring[i].status_n_length &= cpu_to_le32(0x0000ffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 skb = hmp->tx_skbuff[i];
1120 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001121 pci_unmap_single(hmp->pci_dev, leXX_to_cpu(hmp->tx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 skb->len, PCI_DMA_TODEVICE);
1123 dev_kfree_skb(skb);
1124 hmp->tx_skbuff[i] = NULL;
1125 }
1126 }
1127
1128 udelay(60); /* Sleep 60 us just for safety sake */
1129 writew(0x0002, ioaddr + RxCmd); /* STOP Rx */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001130
1131 writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133 hmp->tx_full = 0;
1134 hmp->cur_rx = hmp->cur_tx = 0;
1135 hmp->dirty_rx = hmp->dirty_tx = 0;
1136 /* Rx packets are also presumed lost; however, we need to make sure a
1137 * ring of buffers is in tact. -KDU
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001138 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 for (i = 0; i < RX_RING_SIZE; i++){
1140 struct sk_buff *skb = hmp->rx_skbuff[i];
1141
1142 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001143 pci_unmap_single(hmp->pci_dev,
1144 leXX_to_cpu(hmp->rx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1146 dev_kfree_skb(skb);
1147 hmp->rx_skbuff[i] = NULL;
1148 }
1149 }
1150 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1151 for (i = 0; i < RX_RING_SIZE; i++) {
Eric Dumazet89d71a62009-10-13 05:34:20 +00001152 struct sk_buff *skb;
1153
1154 skb = netdev_alloc_skb_ip_align(dev, hmp->rx_buf_sz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 hmp->rx_skbuff[i] = skb;
1156 if (skb == NULL)
1157 break;
Stephen Hemminger8eb601312008-04-16 16:37:38 -07001158
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001159 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001160 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001161 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
1163 }
1164 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1165 /* Mark the last entry as wrapping the ring. */
1166 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1167
1168 /* Trigger an immediate transmit demand. */
Eric Dumazetcdd0db02009-05-28 00:00:41 +00001169 dev->trans_start = jiffies; /* prevent tx timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 hmp->stats.tx_errors++;
1171
1172 /* Restart the chip's Tx/Rx processes . */
1173 writew(0x0002, ioaddr + TxCmd); /* STOP Tx */
1174 writew(0x0001, ioaddr + TxCmd); /* START Tx */
1175 writew(0x0001, ioaddr + RxCmd); /* START Rx */
1176
1177 netif_wake_queue(dev);
1178}
1179
1180
1181/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1182static void hamachi_init_ring(struct net_device *dev)
1183{
1184 struct hamachi_private *hmp = netdev_priv(dev);
1185 int i;
1186
1187 hmp->tx_full = 0;
1188 hmp->cur_rx = hmp->cur_tx = 0;
1189 hmp->dirty_rx = hmp->dirty_tx = 0;
1190
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001192 * card needs room to do 8 byte alignment, +2 so we can reserve
1193 * the first 2 bytes, and +16 gets room for the status word from the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 * card. -KDU
1195 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001196 hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
Eric Dumazet89d71a62009-10-13 05:34:20 +00001197 (((dev->mtu+26+7) & ~7) + 16));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
1199 /* Initialize all Rx descriptors. */
1200 for (i = 0; i < RX_RING_SIZE; i++) {
1201 hmp->rx_ring[i].status_n_length = 0;
1202 hmp->rx_skbuff[i] = NULL;
1203 }
1204 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1205 for (i = 0; i < RX_RING_SIZE; i++) {
1206 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1207 hmp->rx_skbuff[i] = skb;
1208 if (skb == NULL)
1209 break;
1210 skb->dev = dev; /* Mark as being used by this device. */
1211 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001212 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001213 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001215 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
1217 }
1218 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1219 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1220
1221 for (i = 0; i < TX_RING_SIZE; i++) {
1222 hmp->tx_skbuff[i] = NULL;
1223 hmp->tx_ring[i].status_n_length = 0;
1224 }
1225 /* Mark the last entry of the ring */
1226 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227}
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); \
Harvey Harrison09640e62009-02-01 00:45:17 -08001248 csum_add(sum, cpu_to_be16(IPPROTO_UDP)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 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); \
Harvey Harrison09640e62009-02-01 00:45:17 -08001259 csum_add(sum, cpu_to_be16(IPPROTO_TCP)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 csum_add(sum, htons(len)); \
1261} while (0)
1262#endif
1263
Stephen Hemminger613573252009-08-31 19:50:58 +00001264static netdev_tx_t hamachi_start_xmit(struct sk_buff *skb,
1265 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266{
1267 struct hamachi_private *hmp = netdev_priv(dev);
1268 unsigned entry;
1269 u16 status;
1270
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001271 /* Ok, now make sure that the queue has space before trying to
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 add another skbuff. if we return non-zero the scheduler
1273 should interpret this as a queue full and requeue the buffer
1274 for later.
1275 */
1276 if (hmp->tx_full) {
1277 /* We should NEVER reach this point -KDU */
1278 printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
1279
1280 /* Wake the potentially-idle transmit channel. */
1281 /* If we don't need to read status, DON'T -KDU */
1282 status=readw(hmp->base + TxStatus);
1283 if( !(status & 0x0001) || (status & 0x0002))
1284 writew(0x0001, hmp->base + TxCmd);
Patrick McHardy5b548142009-06-12 06:22:29 +00001285 return NETDEV_TX_BUSY;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001286 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
1288 /* Caution: the write order is important here, set the field
1289 with the "ownership" bits last. */
1290
1291 /* Calculate the next Tx descriptor entry. */
1292 entry = hmp->cur_tx % TX_RING_SIZE;
1293
1294 hmp->tx_skbuff[entry] = skb;
1295
1296#ifdef TX_CHECKSUM
1297 {
1298 /* tack on checksum tag */
1299 u32 tagval = 0;
1300 struct ethhdr *eh = (struct ethhdr *)skb->data;
Harvey Harrison09640e62009-02-01 00:45:17 -08001301 if (eh->h_proto == cpu_to_be16(ETH_P_IP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
1303 if (ih->protocol == IPPROTO_UDP) {
1304 struct udphdr *uh
1305 = (struct udphdr *)((char *)ih + ih->ihl*4);
1306 u32 offset = ((unsigned char *)uh + 6) - skb->data;
1307 u32 pseudo;
1308 pseudo_csum_udp(pseudo, ih, uh);
1309 pseudo = htons(pseudo);
1310 printk("udp cksum was %04x, sending pseudo %04x\n",
1311 uh->check, pseudo);
1312 uh->check = 0; /* zero out uh->check before card calc */
1313 /*
1314 * start at 14 (skip ethhdr), store at offset (uh->check),
1315 * use pseudo value given.
1316 */
1317 tagval = (14 << 24) | (offset << 16) | pseudo;
1318 } else if (ih->protocol == IPPROTO_TCP) {
1319 printk("tcp, no auto cksum\n");
1320 }
1321 }
1322 *(u32 *)skb_push(skb, 8) = tagval;
1323 }
1324#endif
1325
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001326 hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 skb->data, skb->len, PCI_DMA_TODEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 /* Hmmmm, could probably put a DescIntr on these, but the way
1330 the driver is currently coded makes Tx interrupts unnecessary
1331 since the clearing of the Tx ring is handled by the start_xmit
1332 routine. This organization helps mitigate the interrupts a
1333 bit and probably renders the max_tx_latency param useless.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001334
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 Update: Putting a DescIntr bit on all of the descriptors and
1336 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1337 */
1338 if (entry >= TX_RING_SIZE-1) /* Wrap ring */
1339 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1340 DescEndPacket | DescEndRing | DescIntr | skb->len);
1341 else
1342 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1343 DescEndPacket | DescIntr | skb->len);
1344 hmp->cur_tx++;
1345
1346 /* Non-x86 Todo: explicitly flush cache lines here. */
1347
1348 /* Wake the potentially-idle transmit channel. */
1349 /* If we don't need to read status, DON'T -KDU */
1350 status=readw(hmp->base + TxStatus);
1351 if( !(status & 0x0001) || (status & 0x0002))
1352 writew(0x0001, hmp->base + TxCmd);
1353
1354 /* Immediately before returning, let's clear as many entries as we can. */
1355 hamachi_tx(dev);
1356
1357 /* We should kick the bottom half here, since we are not accepting
1358 * interrupts with every packet. i.e. realize that Gigabit ethernet
1359 * can transmit faster than ordinary machines can load packets;
1360 * hence, any packet that got put off because we were in the transmit
1361 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1362 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001363 if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 netif_wake_queue(dev); /* Typical path */
1365 else {
1366 hmp->tx_full = 1;
1367 netif_stop_queue(dev);
1368 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
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 }
Patrick McHardy6ed10652009-06-23 06:03:08 +00001374 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375}
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;
Harvey Harrison6caf52a42008-04-29 01:03:36 -07001511 frame_status = 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. */
Joe Perches8e95a202009-12-03 07:58:21 +00001565 if (pkt_len < rx_copybreak &&
1566 (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567#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 */
Harvey Harrison09640e62009-02-01 00:45:17 -08001609 if (!(ih->frag_off & cpu_to_be16(IP_MF|IP_OFFSET))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 hmp->stats.rx_packets++;
1658 }
1659 entry = (++hmp->cur_rx) % RX_RING_SIZE;
1660 }
1661
1662 /* Refill the Rx ring buffers. */
1663 for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
1664 struct hamachi_desc *desc;
1665
1666 entry = hmp->dirty_rx % RX_RING_SIZE;
1667 desc = &(hmp->rx_ring[entry]);
1668 if (hmp->rx_skbuff[entry] == NULL) {
1669 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1670
1671 hmp->rx_skbuff[entry] = skb;
1672 if (skb == NULL)
1673 break; /* Better luck next round. */
1674 skb->dev = dev; /* Mark as being used by this device. */
1675 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001676 desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001677 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678 }
1679 desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
1680 if (entry >= RX_RING_SIZE-1)
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 | DescEndRing | DescIntr);
1683 else
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001684 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 DescEndPacket | DescIntr);
1686 }
1687
1688 /* Restart Rx engine if stopped. */
1689 /* If we don't need to check status, don't. -KDU */
1690 if (readw(hmp->base + RxStatus) & 0x0002)
1691 writew(0x0001, hmp->base + RxCmd);
1692
1693 return 0;
1694}
1695
1696/* This is more properly named "uncommon interrupt events", as it covers more
1697 than just errors. */
1698static void hamachi_error(struct net_device *dev, int intr_status)
1699{
1700 struct hamachi_private *hmp = netdev_priv(dev);
1701 void __iomem *ioaddr = hmp->base;
1702
1703 if (intr_status & (LinkChange|NegotiationChange)) {
1704 if (hamachi_debug > 1)
1705 printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
1706 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1707 dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
1708 readw(ioaddr + ANLinkPartnerAbility),
1709 readl(ioaddr + IntrStatus));
1710 if (readw(ioaddr + ANStatus) & 0x20)
1711 writeb(0x01, ioaddr + LEDCtrl);
1712 else
1713 writeb(0x03, ioaddr + LEDCtrl);
1714 }
1715 if (intr_status & StatsMax) {
1716 hamachi_get_stats(dev);
1717 /* Read the overflow bits to clear. */
1718 readl(ioaddr + 0x370);
1719 readl(ioaddr + 0x3F0);
1720 }
Joe Perches8e95a202009-12-03 07:58:21 +00001721 if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone)) &&
1722 hamachi_debug)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
Joe Perches8e95a202009-12-03 07:58:21 +00001724 dev->name, intr_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1726 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
1727 hmp->stats.tx_fifo_errors++;
1728 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
1729 hmp->stats.rx_fifo_errors++;
1730}
1731
1732static int hamachi_close(struct net_device *dev)
1733{
1734 struct hamachi_private *hmp = netdev_priv(dev);
1735 void __iomem *ioaddr = hmp->base;
1736 struct sk_buff *skb;
1737 int i;
1738
1739 netif_stop_queue(dev);
1740
1741 if (hamachi_debug > 1) {
1742 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1743 dev->name, readw(ioaddr + TxStatus),
1744 readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
1745 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1746 dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
1747 }
1748
1749 /* Disable interrupts by clearing the interrupt mask. */
1750 writel(0x0000, ioaddr + InterruptEnable);
1751
1752 /* Stop the chip's Tx and Rx processes. */
1753 writel(2, ioaddr + RxCmd);
1754 writew(2, ioaddr + TxCmd);
1755
1756#ifdef __i386__
1757 if (hamachi_debug > 2) {
Joe Perchesad361c92009-07-06 13:05:40 -07001758 printk(KERN_DEBUG " Tx ring at %8.8x:\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 (int)hmp->tx_ring_dma);
1760 for (i = 0; i < TX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001761 printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
1763 i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
Joe Perchesad361c92009-07-06 13:05:40 -07001764 printk(KERN_DEBUG " Rx ring %8.8x:\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 (int)hmp->rx_ring_dma);
1766 for (i = 0; i < RX_RING_SIZE; i++) {
1767 printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
1768 readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
1769 i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
1770 if (hamachi_debug > 6) {
David S. Miller689be432005-06-28 15:25:31 -07001771 if (*(u8*)hmp->rx_skbuff[i]->data != 0x69) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772 u16 *addr = (u16 *)
David S. Miller689be432005-06-28 15:25:31 -07001773 hmp->rx_skbuff[i]->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 int j;
Joe Perchesad361c92009-07-06 13:05:40 -07001775 printk(KERN_DEBUG "Addr: ");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 for (j = 0; j < 0x50; j++)
1777 printk(" %4.4x", addr[j]);
1778 printk("\n");
1779 }
1780 }
1781 }
1782 }
1783#endif /* __i386__ debugging only */
1784
1785 free_irq(dev->irq, dev);
1786
1787 del_timer_sync(&hmp->timer);
1788
1789 /* Free all the skbuffs in the Rx queue. */
1790 for (i = 0; i < RX_RING_SIZE; i++) {
1791 skb = hmp->rx_skbuff[i];
1792 hmp->rx_ring[i].status_n_length = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001794 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001795 leXX_to_cpu(hmp->rx_ring[i].addr),
1796 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 dev_kfree_skb(skb);
1798 hmp->rx_skbuff[i] = NULL;
1799 }
Al Viro8e985912007-12-10 18:39:29 +00001800 hmp->rx_ring[i].addr = cpu_to_leXX(0xBADF00D0); /* An invalid address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 }
1802 for (i = 0; i < TX_RING_SIZE; i++) {
1803 skb = hmp->tx_skbuff[i];
1804 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001805 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001806 leXX_to_cpu(hmp->tx_ring[i].addr),
1807 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 dev_kfree_skb(skb);
1809 hmp->tx_skbuff[i] = NULL;
1810 }
1811 }
1812
1813 writeb(0x00, ioaddr + LEDCtrl);
1814
1815 return 0;
1816}
1817
1818static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
1819{
1820 struct hamachi_private *hmp = netdev_priv(dev);
1821 void __iomem *ioaddr = hmp->base;
1822
1823 /* We should lock this segment of code for SMP eventually, although
1824 the vulnerability window is very small and statistics are
1825 non-critical. */
1826 /* Ok, what goes here? This appears to be stuck at 21 packets
1827 according to ifconfig. It does get incremented in hamachi_tx(),
1828 so I think I'll comment it out here and see if better things
1829 happen.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001830 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1832
1833 hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
1834 hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
1835 hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
1836
1837 hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
1838 hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
1839 hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
1840 hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
1841 hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
1842
1843 return &hmp->stats;
1844}
1845
1846static void set_rx_mode(struct net_device *dev)
1847{
1848 struct hamachi_private *hmp = netdev_priv(dev);
1849 void __iomem *ioaddr = hmp->base;
1850
1851 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 writew(0x000F, ioaddr + AddrMode);
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001853 } else if ((netdev_mc_count(dev) > 63) || (dev->flags & IFF_ALLMULTI)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 /* Too many to match, or accept all multicasts. */
1855 writew(0x000B, ioaddr + AddrMode);
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001856 } else if (!netdev_mc_empty(dev)) { /* Must use the CAM filter. */
Jiri Pirko22bedad32010-04-01 21:22:57 +00001857 struct netdev_hw_addr *ha;
Jiri Pirko48e2f182010-02-22 09:22:26 +00001858 int i = 0;
1859
Jiri Pirko22bedad32010-04-01 21:22:57 +00001860 netdev_for_each_mc_addr(ha, dev) {
1861 writel(*(u32 *)(ha->addr), ioaddr + 0x100 + i*8);
1862 writel(0x20000 | (*(u16 *)&ha->addr[4]),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 ioaddr + 0x104 + i*8);
Jiri Pirko48e2f182010-02-22 09:22:26 +00001864 i++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 }
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
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00001990static DEFINE_PCI_DEVICE_TABLE(hamachi_pci_tbl) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 { 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);