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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;
862 return;
863}
864
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866static int hamachi_open(struct net_device *dev)
867{
868 struct hamachi_private *hmp = netdev_priv(dev);
869 void __iomem *ioaddr = hmp->base;
870 int i;
871 u32 rx_int_var, tx_int_var;
872 u16 fifo_info;
873
Joe Perchesa0607fd2009-11-18 23:29:17 -0800874 i = request_irq(dev->irq, hamachi_interrupt, IRQF_SHARED, dev->name, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 if (i)
876 return i;
877
878 if (hamachi_debug > 1)
879 printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
880 dev->name, dev->irq);
881
882 hamachi_init_ring(dev);
883
884#if ADDRLEN == 64
885 /* writellll anyone ? */
Al Viro8e985912007-12-10 18:39:29 +0000886 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
887 writel(hmp->rx_ring_dma >> 32, ioaddr + RxPtr + 4);
888 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
889 writel(hmp->tx_ring_dma >> 32, ioaddr + TxPtr + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890#else
Al Viro8e985912007-12-10 18:39:29 +0000891 writel(hmp->rx_ring_dma, ioaddr + RxPtr);
892 writel(hmp->tx_ring_dma, ioaddr + TxPtr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893#endif
894
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400895 /* TODO: It would make sense to organize this as words since the card
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 * documentation does. -KDU
897 */
898 for (i = 0; i < 6; i++)
899 writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
900
901 /* Initialize other registers: with so many this eventually this will
902 converted to an offset/value list. */
903
904 /* Configure the FIFO */
905 fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
906 switch (fifo_info){
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400907 case 0 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 /* No FIFO */
909 writew(0x0000, ioaddr + FIFOcfg);
910 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400911 case 1 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 /* Configure the FIFO for 512K external, 16K used for Tx. */
913 writew(0x0028, ioaddr + FIFOcfg);
914 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400915 case 2 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 /* Configure the FIFO for 1024 external, 32K used for Tx. */
917 writew(0x004C, ioaddr + FIFOcfg);
918 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400919 case 3 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 /* Configure the FIFO for 2048 external, 32K used for Tx. */
921 writew(0x006C, ioaddr + FIFOcfg);
922 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400923 default :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 printk(KERN_WARNING "%s: Unsupported external memory config!\n",
925 dev->name);
926 /* Default to no FIFO */
927 writew(0x0000, ioaddr + FIFOcfg);
928 break;
929 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 if (dev->if_port == 0)
932 dev->if_port = hmp->default_port;
933
934
935 /* Setting the Rx mode will start the Rx process. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400936 /* If someone didn't choose a duplex, default to full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 if (hmp->duplex_lock != 1)
938 hmp->mii_if.full_duplex = 1;
939
940 /* always 1, takes no more time to do it */
941 writew(0x0001, ioaddr + RxChecksum);
942#ifdef TX_CHECKSUM
943 writew(0x0001, ioaddr + TxChecksum);
944#else
945 writew(0x0000, ioaddr + TxChecksum);
946#endif
947 writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
948 writew(0x215F, ioaddr + MACCnfg);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400949 writew(0x000C, ioaddr + FrameGap0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
951 writew(0x1018, ioaddr + FrameGap1);
952 /* Why do we enable receives/transmits here? -KDU */
953 writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
954 /* Enable automatic generation of flow control frames, period 0xffff. */
955 writel(0x0030FFFF, ioaddr + FlowCtrl);
956 writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
957
958 /* Enable legacy links. */
959 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
960 /* Initial Link LED to blinking red. */
961 writeb(0x03, ioaddr + LEDCtrl);
962
963 /* Configure interrupt mitigation. This has a great effect on
964 performance, so systems tuning should start here!. */
965
966 rx_int_var = hmp->rx_int_var;
967 tx_int_var = hmp->tx_int_var;
968
969 if (hamachi_debug > 1) {
970 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400971 tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 (tx_int_var & 0x00ff0000) >> 16);
973 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400974 rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 (rx_int_var & 0x00ff0000) >> 16);
976 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
977 }
978
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400979 writel(tx_int_var, ioaddr + TxIntrCtrl);
980 writel(rx_int_var, ioaddr + RxIntrCtrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982 set_rx_mode(dev);
983
984 netif_start_queue(dev);
985
986 /* Enable interrupts by setting the interrupt mask. */
987 writel(0x80878787, ioaddr + InterruptEnable);
988 writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
989
990 /* Configure and start the DMA channels. */
991 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
992#if ADDRLEN == 64
993 writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
994 writew(0x005D, ioaddr + TxDMACtrl);
995#else
996 writew(0x001D, ioaddr + RxDMACtrl);
997 writew(0x001D, ioaddr + TxDMACtrl);
998#endif
999 writew(0x0001, ioaddr + RxCmd);
1000
1001 if (hamachi_debug > 2) {
1002 printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
1003 dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
1004 }
1005 /* Set the timer to check for link beat. */
1006 init_timer(&hmp->timer);
1007 hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
1008 hmp->timer.data = (unsigned long)dev;
1009 hmp->timer.function = &hamachi_timer; /* timer handler */
1010 add_timer(&hmp->timer);
1011
1012 return 0;
1013}
1014
1015static inline int hamachi_tx(struct net_device *dev)
1016{
1017 struct hamachi_private *hmp = netdev_priv(dev);
1018
1019 /* Update the dirty pointer until we find an entry that is
1020 still owned by the card */
1021 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
1022 int entry = hmp->dirty_tx % TX_RING_SIZE;
1023 struct sk_buff *skb;
1024
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001025 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 break;
1027 /* Free the original skb. */
1028 skb = hmp->tx_skbuff[entry];
Stephen Hemmingerddfce6b2007-10-05 17:19:47 -07001029 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001030 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001031 leXX_to_cpu(hmp->tx_ring[entry].addr),
1032 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 dev_kfree_skb(skb);
1034 hmp->tx_skbuff[entry] = NULL;
1035 }
1036 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001037 if (entry >= TX_RING_SIZE-1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001039 cpu_to_le32(DescEndRing);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 hmp->stats.tx_packets++;
1041 }
1042
1043 return 0;
1044}
1045
1046static void hamachi_timer(unsigned long data)
1047{
1048 struct net_device *dev = (struct net_device *)data;
1049 struct hamachi_private *hmp = netdev_priv(dev);
1050 void __iomem *ioaddr = hmp->base;
1051 int next_tick = 10*HZ;
1052
1053 if (hamachi_debug > 2) {
1054 printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
1055 "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
1056 readw(ioaddr + ANLinkPartnerAbility));
1057 printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1058 "%4.4x %4.4x %4.4x.\n", dev->name,
1059 readw(ioaddr + 0x0e0),
1060 readw(ioaddr + 0x0e2),
1061 readw(ioaddr + 0x0e4),
1062 readw(ioaddr + 0x0e6),
1063 readw(ioaddr + 0x0e8),
1064 readw(ioaddr + 0x0eA));
1065 }
1066 /* We could do something here... nah. */
1067 hmp->timer.expires = RUN_AT(next_tick);
1068 add_timer(&hmp->timer);
1069}
1070
1071static void hamachi_tx_timeout(struct net_device *dev)
1072{
1073 int i;
1074 struct hamachi_private *hmp = netdev_priv(dev);
1075 void __iomem *ioaddr = hmp->base;
1076
1077 printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
1078 " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
1079
1080 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
1082 for (i = 0; i < RX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001083 printk(KERN_CONT " %8.8x",
1084 le32_to_cpu(hmp->rx_ring[i].status_n_length));
1085 printk(KERN_CONT "\n");
1086 printk(KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 for (i = 0; i < TX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001088 printk(KERN_CONT " %4.4x",
1089 le32_to_cpu(hmp->tx_ring[i].status_n_length));
1090 printk(KERN_CONT "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 }
1092
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001093 /* Reinit the hardware and make sure the Rx and Tx processes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 are up and running.
1095 */
1096 dev->if_port = 0;
1097 /* The right way to do Reset. -KDU
1098 * -Clear OWN bit in all Rx/Tx descriptors
1099 * -Wait 50 uS for channels to go idle
1100 * -Turn off MAC receiver
1101 * -Issue Reset
1102 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001103
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 for (i = 0; i < RX_RING_SIZE; i++)
1105 hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
1106
1107 /* Presume that all packets in the Tx queue are gone if we have to
1108 * re-init the hardware.
1109 */
1110 for (i = 0; i < TX_RING_SIZE; i++){
1111 struct sk_buff *skb;
1112
1113 if (i >= TX_RING_SIZE - 1)
Al Viro8e985912007-12-10 18:39:29 +00001114 hmp->tx_ring[i].status_n_length =
1115 cpu_to_le32(DescEndRing) |
1116 (hmp->tx_ring[i].status_n_length &
1117 cpu_to_le32(0x0000ffff));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001118 else
Al Viro8e985912007-12-10 18:39:29 +00001119 hmp->tx_ring[i].status_n_length &= cpu_to_le32(0x0000ffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 skb = hmp->tx_skbuff[i];
1121 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001122 pci_unmap_single(hmp->pci_dev, leXX_to_cpu(hmp->tx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 skb->len, PCI_DMA_TODEVICE);
1124 dev_kfree_skb(skb);
1125 hmp->tx_skbuff[i] = NULL;
1126 }
1127 }
1128
1129 udelay(60); /* Sleep 60 us just for safety sake */
1130 writew(0x0002, ioaddr + RxCmd); /* STOP Rx */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001131
1132 writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134 hmp->tx_full = 0;
1135 hmp->cur_rx = hmp->cur_tx = 0;
1136 hmp->dirty_rx = hmp->dirty_tx = 0;
1137 /* Rx packets are also presumed lost; however, we need to make sure a
1138 * ring of buffers is in tact. -KDU
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001139 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 for (i = 0; i < RX_RING_SIZE; i++){
1141 struct sk_buff *skb = hmp->rx_skbuff[i];
1142
1143 if (skb){
Al Viro8e985912007-12-10 18:39:29 +00001144 pci_unmap_single(hmp->pci_dev,
1145 leXX_to_cpu(hmp->rx_ring[i].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1147 dev_kfree_skb(skb);
1148 hmp->rx_skbuff[i] = NULL;
1149 }
1150 }
1151 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1152 for (i = 0; i < RX_RING_SIZE; i++) {
Eric Dumazet89d71a62009-10-13 05:34:20 +00001153 struct sk_buff *skb;
1154
1155 skb = netdev_alloc_skb_ip_align(dev, hmp->rx_buf_sz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 hmp->rx_skbuff[i] = skb;
1157 if (skb == NULL)
1158 break;
Stephen Hemminger8eb601312008-04-16 16:37:38 -07001159
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001160 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001161 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001162 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
1164 }
1165 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1166 /* Mark the last entry as wrapping the ring. */
1167 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1168
1169 /* Trigger an immediate transmit demand. */
Eric Dumazetcdd0db02009-05-28 00:00:41 +00001170 dev->trans_start = jiffies; /* prevent tx timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 hmp->stats.tx_errors++;
1172
1173 /* Restart the chip's Tx/Rx processes . */
1174 writew(0x0002, ioaddr + TxCmd); /* STOP Tx */
1175 writew(0x0001, ioaddr + TxCmd); /* START Tx */
1176 writew(0x0001, ioaddr + RxCmd); /* START Rx */
1177
1178 netif_wake_queue(dev);
1179}
1180
1181
1182/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1183static void hamachi_init_ring(struct net_device *dev)
1184{
1185 struct hamachi_private *hmp = netdev_priv(dev);
1186 int i;
1187
1188 hmp->tx_full = 0;
1189 hmp->cur_rx = hmp->cur_tx = 0;
1190 hmp->dirty_rx = hmp->dirty_tx = 0;
1191
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001193 * card needs room to do 8 byte alignment, +2 so we can reserve
1194 * the first 2 bytes, and +16 gets room for the status word from the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 * card. -KDU
1196 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001197 hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
Eric Dumazet89d71a62009-10-13 05:34:20 +00001198 (((dev->mtu+26+7) & ~7) + 16));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200 /* Initialize all Rx descriptors. */
1201 for (i = 0; i < RX_RING_SIZE; i++) {
1202 hmp->rx_ring[i].status_n_length = 0;
1203 hmp->rx_skbuff[i] = NULL;
1204 }
1205 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1206 for (i = 0; i < RX_RING_SIZE; i++) {
1207 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1208 hmp->rx_skbuff[i] = skb;
1209 if (skb == NULL)
1210 break;
1211 skb->dev = dev; /* Mark as being used by this device. */
1212 skb_reserve(skb, 2); /* 16 byte align the IP header. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001213 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001214 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001216 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
1218 }
1219 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1220 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1221
1222 for (i = 0; i < TX_RING_SIZE; i++) {
1223 hmp->tx_skbuff[i] = NULL;
1224 hmp->tx_ring[i].status_n_length = 0;
1225 }
1226 /* Mark the last entry of the ring */
1227 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1228
1229 return;
1230}
1231
1232
1233#ifdef TX_CHECKSUM
1234#define csum_add(it, val) \
1235do { \
1236 it += (u16) (val); \
1237 if (it & 0xffff0000) { \
1238 it &= 0xffff; \
1239 ++it; \
1240 } \
1241} while (0)
1242 /* printk("add %04x --> %04x\n", val, it); \ */
1243
1244/* uh->len already network format, do not swap */
1245#define pseudo_csum_udp(sum,ih,uh) do { \
1246 sum = 0; \
1247 csum_add(sum, (ih)->saddr >> 16); \
1248 csum_add(sum, (ih)->saddr & 0xffff); \
1249 csum_add(sum, (ih)->daddr >> 16); \
1250 csum_add(sum, (ih)->daddr & 0xffff); \
Harvey Harrison09640e62009-02-01 00:45:17 -08001251 csum_add(sum, cpu_to_be16(IPPROTO_UDP)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 csum_add(sum, (uh)->len); \
1253} while (0)
1254
1255/* swap len */
1256#define pseudo_csum_tcp(sum,ih,len) do { \
1257 sum = 0; \
1258 csum_add(sum, (ih)->saddr >> 16); \
1259 csum_add(sum, (ih)->saddr & 0xffff); \
1260 csum_add(sum, (ih)->daddr >> 16); \
1261 csum_add(sum, (ih)->daddr & 0xffff); \
Harvey Harrison09640e62009-02-01 00:45:17 -08001262 csum_add(sum, cpu_to_be16(IPPROTO_TCP)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 csum_add(sum, htons(len)); \
1264} while (0)
1265#endif
1266
Stephen Hemminger613573252009-08-31 19:50:58 +00001267static netdev_tx_t hamachi_start_xmit(struct sk_buff *skb,
1268 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269{
1270 struct hamachi_private *hmp = netdev_priv(dev);
1271 unsigned entry;
1272 u16 status;
1273
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001274 /* Ok, now make sure that the queue has space before trying to
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 add another skbuff. if we return non-zero the scheduler
1276 should interpret this as a queue full and requeue the buffer
1277 for later.
1278 */
1279 if (hmp->tx_full) {
1280 /* We should NEVER reach this point -KDU */
1281 printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
1282
1283 /* Wake the potentially-idle transmit channel. */
1284 /* If we don't need to read status, DON'T -KDU */
1285 status=readw(hmp->base + TxStatus);
1286 if( !(status & 0x0001) || (status & 0x0002))
1287 writew(0x0001, hmp->base + TxCmd);
Patrick McHardy5b548142009-06-12 06:22:29 +00001288 return NETDEV_TX_BUSY;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001289 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
1291 /* Caution: the write order is important here, set the field
1292 with the "ownership" bits last. */
1293
1294 /* Calculate the next Tx descriptor entry. */
1295 entry = hmp->cur_tx % TX_RING_SIZE;
1296
1297 hmp->tx_skbuff[entry] = skb;
1298
1299#ifdef TX_CHECKSUM
1300 {
1301 /* tack on checksum tag */
1302 u32 tagval = 0;
1303 struct ethhdr *eh = (struct ethhdr *)skb->data;
Harvey Harrison09640e62009-02-01 00:45:17 -08001304 if (eh->h_proto == cpu_to_be16(ETH_P_IP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
1306 if (ih->protocol == IPPROTO_UDP) {
1307 struct udphdr *uh
1308 = (struct udphdr *)((char *)ih + ih->ihl*4);
1309 u32 offset = ((unsigned char *)uh + 6) - skb->data;
1310 u32 pseudo;
1311 pseudo_csum_udp(pseudo, ih, uh);
1312 pseudo = htons(pseudo);
1313 printk("udp cksum was %04x, sending pseudo %04x\n",
1314 uh->check, pseudo);
1315 uh->check = 0; /* zero out uh->check before card calc */
1316 /*
1317 * start at 14 (skip ethhdr), store at offset (uh->check),
1318 * use pseudo value given.
1319 */
1320 tagval = (14 << 24) | (offset << 16) | pseudo;
1321 } else if (ih->protocol == IPPROTO_TCP) {
1322 printk("tcp, no auto cksum\n");
1323 }
1324 }
1325 *(u32 *)skb_push(skb, 8) = tagval;
1326 }
1327#endif
1328
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001329 hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 skb->data, skb->len, PCI_DMA_TODEVICE));
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001331
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 /* Hmmmm, could probably put a DescIntr on these, but the way
1333 the driver is currently coded makes Tx interrupts unnecessary
1334 since the clearing of the Tx ring is handled by the start_xmit
1335 routine. This organization helps mitigate the interrupts a
1336 bit and probably renders the max_tx_latency param useless.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001337
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 Update: Putting a DescIntr bit on all of the descriptors and
1339 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1340 */
1341 if (entry >= TX_RING_SIZE-1) /* Wrap ring */
1342 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1343 DescEndPacket | DescEndRing | DescIntr | skb->len);
1344 else
1345 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1346 DescEndPacket | DescIntr | skb->len);
1347 hmp->cur_tx++;
1348
1349 /* Non-x86 Todo: explicitly flush cache lines here. */
1350
1351 /* Wake the potentially-idle transmit channel. */
1352 /* If we don't need to read status, DON'T -KDU */
1353 status=readw(hmp->base + TxStatus);
1354 if( !(status & 0x0001) || (status & 0x0002))
1355 writew(0x0001, hmp->base + TxCmd);
1356
1357 /* Immediately before returning, let's clear as many entries as we can. */
1358 hamachi_tx(dev);
1359
1360 /* We should kick the bottom half here, since we are not accepting
1361 * interrupts with every packet. i.e. realize that Gigabit ethernet
1362 * can transmit faster than ordinary machines can load packets;
1363 * hence, any packet that got put off because we were in the transmit
1364 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1365 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001366 if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 netif_wake_queue(dev); /* Typical path */
1368 else {
1369 hmp->tx_full = 1;
1370 netif_stop_queue(dev);
1371 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
1373 if (hamachi_debug > 4) {
1374 printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n",
1375 dev->name, hmp->cur_tx, entry);
1376 }
Patrick McHardy6ed10652009-06-23 06:03:08 +00001377 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378}
1379
1380/* The interrupt handler does all of the Rx thread work and cleans up
1381 after the Tx thread. */
David Howells7d12e782006-10-05 14:55:46 +01001382static irqreturn_t hamachi_interrupt(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383{
1384 struct net_device *dev = dev_instance;
1385 struct hamachi_private *hmp = netdev_priv(dev);
1386 void __iomem *ioaddr = hmp->base;
1387 long boguscnt = max_interrupt_work;
1388 int handled = 0;
1389
1390#ifndef final_version /* Can never occur. */
1391 if (dev == NULL) {
1392 printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
1393 return IRQ_NONE;
1394 }
1395#endif
1396
1397 spin_lock(&hmp->lock);
1398
1399 do {
1400 u32 intr_status = readl(ioaddr + InterruptClear);
1401
1402 if (hamachi_debug > 4)
1403 printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
1404 dev->name, intr_status);
1405
1406 if (intr_status == 0)
1407 break;
1408
1409 handled = 1;
1410
1411 if (intr_status & IntrRxDone)
1412 hamachi_rx(dev);
1413
1414 if (intr_status & IntrTxDone){
1415 /* This code should RARELY need to execute. After all, this is
1416 * a gigabit link, it should consume packets as fast as we put
1417 * them in AND we clear the Tx ring in hamachi_start_xmit().
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001418 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 if (hmp->tx_full){
1420 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){
1421 int entry = hmp->dirty_tx % TX_RING_SIZE;
1422 struct sk_buff *skb;
1423
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001424 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 break;
1426 skb = hmp->tx_skbuff[entry];
1427 /* Free the original skb. */
1428 if (skb){
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001429 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001430 leXX_to_cpu(hmp->tx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 skb->len,
1432 PCI_DMA_TODEVICE);
1433 dev_kfree_skb_irq(skb);
1434 hmp->tx_skbuff[entry] = NULL;
1435 }
1436 hmp->tx_ring[entry].status_n_length = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001437 if (entry >= TX_RING_SIZE-1)
1438 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 cpu_to_le32(DescEndRing);
1440 hmp->stats.tx_packets++;
1441 }
1442 if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){
1443 /* The ring is no longer full */
1444 hmp->tx_full = 0;
1445 netif_wake_queue(dev);
1446 }
1447 } else {
1448 netif_wake_queue(dev);
1449 }
1450 }
1451
1452
1453 /* Abnormal error summary/uncommon events handlers. */
1454 if (intr_status &
1455 (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
1456 LinkChange | NegotiationChange | StatsMax))
1457 hamachi_error(dev, intr_status);
1458
1459 if (--boguscnt < 0) {
1460 printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n",
1461 dev->name, intr_status);
1462 break;
1463 }
1464 } while (1);
1465
1466 if (hamachi_debug > 3)
1467 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1468 dev->name, readl(ioaddr + IntrStatus));
1469
1470#ifndef final_version
1471 /* Code that should never be run! Perhaps remove after testing.. */
1472 {
1473 static int stopit = 10;
1474 if (dev->start == 0 && --stopit < 0) {
1475 printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
1476 dev->name);
1477 free_irq(irq, dev);
1478 }
1479 }
1480#endif
1481
1482 spin_unlock(&hmp->lock);
1483 return IRQ_RETVAL(handled);
1484}
1485
1486/* This routine is logically part of the interrupt handler, but separated
1487 for clarity and better register allocation. */
1488static int hamachi_rx(struct net_device *dev)
1489{
1490 struct hamachi_private *hmp = netdev_priv(dev);
1491 int entry = hmp->cur_rx % RX_RING_SIZE;
1492 int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx;
1493
1494 if (hamachi_debug > 4) {
1495 printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
1496 entry, hmp->rx_ring[entry].status_n_length);
1497 }
1498
1499 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1500 while (1) {
1501 struct hamachi_desc *desc = &(hmp->rx_ring[entry]);
1502 u32 desc_status = le32_to_cpu(desc->status_n_length);
1503 u16 data_size = desc_status; /* Implicit truncate */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001504 u8 *buf_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 s32 frame_status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 if (desc_status & DescOwn)
1508 break;
1509 pci_dma_sync_single_for_cpu(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001510 leXX_to_cpu(desc->addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 hmp->rx_buf_sz,
1512 PCI_DMA_FROMDEVICE);
David S. Miller689be432005-06-28 15:25:31 -07001513 buf_addr = (u8 *) hmp->rx_skbuff[entry]->data;
Harvey Harrison6caf52a42008-04-29 01:03:36 -07001514 frame_status = get_unaligned_le32(&(buf_addr[data_size - 12]));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 if (hamachi_debug > 4)
1516 printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n",
1517 frame_status);
1518 if (--boguscnt < 0)
1519 break;
1520 if ( ! (desc_status & DescEndPacket)) {
1521 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1522 "multiple buffers, entry %#x length %d status %4.4x!\n",
1523 dev->name, hmp->cur_rx, data_size, desc_status);
1524 printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
1525 dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
1526 printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1527 dev->name,
Al Viro8e985912007-12-10 18:39:29 +00001528 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0xffff0000,
1529 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0x0000ffff,
1530 le32_to_cpu(hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 hmp->stats.rx_length_errors++;
1532 } /* else Omit for prototype errata??? */
1533 if (frame_status & 0x00380000) {
1534 /* There was an error. */
1535 if (hamachi_debug > 2)
1536 printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n",
1537 frame_status);
1538 hmp->stats.rx_errors++;
1539 if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
1540 if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
1541 if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
1542 if (frame_status < 0) hmp->stats.rx_dropped++;
1543 } else {
1544 struct sk_buff *skb;
1545 /* Omit CRC */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001546 u16 pkt_len = (frame_status & 0x07ff) - 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547#ifdef RX_CHECKSUM
1548 u32 pfck = *(u32 *) &buf_addr[data_size - 8];
1549#endif
1550
1551
1552#ifndef final_version
1553 if (hamachi_debug > 4)
1554 printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d"
1555 " of %d, bogus_cnt %d.\n",
1556 pkt_len, data_size, boguscnt);
1557 if (hamachi_debug > 5)
1558 printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1559 dev->name,
1560 *(s32*)&(buf_addr[data_size - 20]),
1561 *(s32*)&(buf_addr[data_size - 16]),
1562 *(s32*)&(buf_addr[data_size - 12]),
1563 *(s32*)&(buf_addr[data_size - 8]),
1564 *(s32*)&(buf_addr[data_size - 4]));
1565#endif
1566 /* Check if the packet is long enough to accept without copying
1567 to a minimally-sized skbuff. */
Joe Perches8e95a202009-12-03 07:58:21 +00001568 if (pkt_len < rx_copybreak &&
1569 (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570#ifdef RX_CHECKSUM
1571 printk(KERN_ERR "%s: rx_copybreak non-zero "
1572 "not good with RX_CHECKSUM\n", dev->name);
1573#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 skb_reserve(skb, 2); /* 16 byte align the IP header */
1575 pci_dma_sync_single_for_cpu(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001576 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 hmp->rx_buf_sz,
1578 PCI_DMA_FROMDEVICE);
1579 /* Call copy + cksum if available. */
1580#if 1 || USE_IP_COPYSUM
David S. Miller8c7b7fa2007-07-10 22:08:12 -07001581 skb_copy_to_linear_data(skb,
1582 hmp->rx_skbuff[entry]->data, pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 skb_put(skb, pkt_len);
1584#else
1585 memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma
1586 + entry*sizeof(*desc), pkt_len);
1587#endif
1588 pci_dma_sync_single_for_device(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001589 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 hmp->rx_buf_sz,
1591 PCI_DMA_FROMDEVICE);
1592 } else {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001593 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001594 leXX_to_cpu(hmp->rx_ring[entry].addr),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1596 skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
1597 hmp->rx_skbuff[entry] = NULL;
1598 }
1599 skb->protocol = eth_type_trans(skb, dev);
1600
1601
1602#ifdef RX_CHECKSUM
1603 /* TCP or UDP on ipv4, DIX encoding */
1604 if (pfck>>24 == 0x91 || pfck>>24 == 0x51) {
1605 struct iphdr *ih = (struct iphdr *) skb->data;
1606 /* Check that IP packet is at least 46 bytes, otherwise,
1607 * there may be pad bytes included in the hardware checksum.
1608 * This wouldn't happen if everyone padded with 0.
1609 */
1610 if (ntohs(ih->tot_len) >= 46){
1611 /* don't worry about frags */
Harvey Harrison09640e62009-02-01 00:45:17 -08001612 if (!(ih->frag_off & cpu_to_be16(IP_MF|IP_OFFSET))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 u32 inv = *(u32 *) &buf_addr[data_size - 16];
1614 u32 *p = (u32 *) &buf_addr[data_size - 20];
1615 register u32 crc, p_r, p_r1;
1616
1617 if (inv & 4) {
1618 inv &= ~4;
1619 --p;
1620 }
1621 p_r = *p;
1622 p_r1 = *(p-1);
1623 switch (inv) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001624 case 0:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 crc = (p_r & 0xffff) + (p_r >> 16);
1626 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001627 case 1:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 crc = (p_r >> 16) + (p_r & 0xffff)
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001629 + (p_r1 >> 16 & 0xff00);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001631 case 2:
1632 crc = p_r + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001634 case 3:
1635 crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 break;
1637 default: /*NOTREACHED*/ crc = 0;
1638 }
1639 if (crc & 0xffff0000) {
1640 crc &= 0xffff;
1641 ++crc;
1642 }
1643 /* tcp/udp will add in pseudo */
1644 skb->csum = ntohs(pfck & 0xffff);
1645 if (skb->csum > crc)
1646 skb->csum -= crc;
1647 else
1648 skb->csum += (~crc & 0xffff);
1649 /*
1650 * could do the pseudo myself and return
1651 * CHECKSUM_UNNECESSARY
1652 */
Patrick McHardy84fa7932006-08-29 16:44:56 -07001653 skb->ip_summed = CHECKSUM_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001655 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 }
1657#endif /* RX_CHECKSUM */
1658
1659 netif_rx(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 hmp->stats.rx_packets++;
1661 }
1662 entry = (++hmp->cur_rx) % RX_RING_SIZE;
1663 }
1664
1665 /* Refill the Rx ring buffers. */
1666 for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
1667 struct hamachi_desc *desc;
1668
1669 entry = hmp->dirty_rx % RX_RING_SIZE;
1670 desc = &(hmp->rx_ring[entry]);
1671 if (hmp->rx_skbuff[entry] == NULL) {
1672 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1673
1674 hmp->rx_skbuff[entry] = skb;
1675 if (skb == NULL)
1676 break; /* Better luck next round. */
1677 skb->dev = dev; /* Mark as being used by this device. */
1678 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001679 desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
David S. Miller689be432005-06-28 15:25:31 -07001680 skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 }
1682 desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
1683 if (entry >= RX_RING_SIZE-1)
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 | DescEndRing | DescIntr);
1686 else
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001687 desc->status_n_length |= cpu_to_le32(DescOwn |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 DescEndPacket | DescIntr);
1689 }
1690
1691 /* Restart Rx engine if stopped. */
1692 /* If we don't need to check status, don't. -KDU */
1693 if (readw(hmp->base + RxStatus) & 0x0002)
1694 writew(0x0001, hmp->base + RxCmd);
1695
1696 return 0;
1697}
1698
1699/* This is more properly named "uncommon interrupt events", as it covers more
1700 than just errors. */
1701static void hamachi_error(struct net_device *dev, int intr_status)
1702{
1703 struct hamachi_private *hmp = netdev_priv(dev);
1704 void __iomem *ioaddr = hmp->base;
1705
1706 if (intr_status & (LinkChange|NegotiationChange)) {
1707 if (hamachi_debug > 1)
1708 printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
1709 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1710 dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
1711 readw(ioaddr + ANLinkPartnerAbility),
1712 readl(ioaddr + IntrStatus));
1713 if (readw(ioaddr + ANStatus) & 0x20)
1714 writeb(0x01, ioaddr + LEDCtrl);
1715 else
1716 writeb(0x03, ioaddr + LEDCtrl);
1717 }
1718 if (intr_status & StatsMax) {
1719 hamachi_get_stats(dev);
1720 /* Read the overflow bits to clear. */
1721 readl(ioaddr + 0x370);
1722 readl(ioaddr + 0x3F0);
1723 }
Joe Perches8e95a202009-12-03 07:58:21 +00001724 if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone)) &&
1725 hamachi_debug)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
Joe Perches8e95a202009-12-03 07:58:21 +00001727 dev->name, intr_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1729 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
1730 hmp->stats.tx_fifo_errors++;
1731 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
1732 hmp->stats.rx_fifo_errors++;
1733}
1734
1735static int hamachi_close(struct net_device *dev)
1736{
1737 struct hamachi_private *hmp = netdev_priv(dev);
1738 void __iomem *ioaddr = hmp->base;
1739 struct sk_buff *skb;
1740 int i;
1741
1742 netif_stop_queue(dev);
1743
1744 if (hamachi_debug > 1) {
1745 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1746 dev->name, readw(ioaddr + TxStatus),
1747 readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
1748 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1749 dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
1750 }
1751
1752 /* Disable interrupts by clearing the interrupt mask. */
1753 writel(0x0000, ioaddr + InterruptEnable);
1754
1755 /* Stop the chip's Tx and Rx processes. */
1756 writel(2, ioaddr + RxCmd);
1757 writew(2, ioaddr + TxCmd);
1758
1759#ifdef __i386__
1760 if (hamachi_debug > 2) {
Joe Perchesad361c92009-07-06 13:05:40 -07001761 printk(KERN_DEBUG " Tx ring at %8.8x:\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 (int)hmp->tx_ring_dma);
1763 for (i = 0; i < TX_RING_SIZE; i++)
Joe Perchesad361c92009-07-06 13:05:40 -07001764 printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
1766 i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
Joe Perchesad361c92009-07-06 13:05:40 -07001767 printk(KERN_DEBUG " Rx ring %8.8x:\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 (int)hmp->rx_ring_dma);
1769 for (i = 0; i < RX_RING_SIZE; i++) {
1770 printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
1771 readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
1772 i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
1773 if (hamachi_debug > 6) {
David S. Miller689be432005-06-28 15:25:31 -07001774 if (*(u8*)hmp->rx_skbuff[i]->data != 0x69) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 u16 *addr = (u16 *)
David S. Miller689be432005-06-28 15:25:31 -07001776 hmp->rx_skbuff[i]->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 int j;
Joe Perchesad361c92009-07-06 13:05:40 -07001778 printk(KERN_DEBUG "Addr: ");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 for (j = 0; j < 0x50; j++)
1780 printk(" %4.4x", addr[j]);
1781 printk("\n");
1782 }
1783 }
1784 }
1785 }
1786#endif /* __i386__ debugging only */
1787
1788 free_irq(dev->irq, dev);
1789
1790 del_timer_sync(&hmp->timer);
1791
1792 /* Free all the skbuffs in the Rx queue. */
1793 for (i = 0; i < RX_RING_SIZE; i++) {
1794 skb = hmp->rx_skbuff[i];
1795 hmp->rx_ring[i].status_n_length = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001797 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001798 leXX_to_cpu(hmp->rx_ring[i].addr),
1799 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 dev_kfree_skb(skb);
1801 hmp->rx_skbuff[i] = NULL;
1802 }
Al Viro8e985912007-12-10 18:39:29 +00001803 hmp->rx_ring[i].addr = cpu_to_leXX(0xBADF00D0); /* An invalid address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 }
1805 for (i = 0; i < TX_RING_SIZE; i++) {
1806 skb = hmp->tx_skbuff[i];
1807 if (skb) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001808 pci_unmap_single(hmp->pci_dev,
Al Viro8e985912007-12-10 18:39:29 +00001809 leXX_to_cpu(hmp->tx_ring[i].addr),
1810 skb->len, PCI_DMA_TODEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 dev_kfree_skb(skb);
1812 hmp->tx_skbuff[i] = NULL;
1813 }
1814 }
1815
1816 writeb(0x00, ioaddr + LEDCtrl);
1817
1818 return 0;
1819}
1820
1821static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
1822{
1823 struct hamachi_private *hmp = netdev_priv(dev);
1824 void __iomem *ioaddr = hmp->base;
1825
1826 /* We should lock this segment of code for SMP eventually, although
1827 the vulnerability window is very small and statistics are
1828 non-critical. */
1829 /* Ok, what goes here? This appears to be stuck at 21 packets
1830 according to ifconfig. It does get incremented in hamachi_tx(),
1831 so I think I'll comment it out here and see if better things
1832 happen.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001833 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1835
1836 hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
1837 hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
1838 hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
1839
1840 hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
1841 hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
1842 hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
1843 hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
1844 hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
1845
1846 return &hmp->stats;
1847}
1848
1849static void set_rx_mode(struct net_device *dev)
1850{
1851 struct hamachi_private *hmp = netdev_priv(dev);
1852 void __iomem *ioaddr = hmp->base;
1853
1854 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 writew(0x000F, ioaddr + AddrMode);
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001856 } else if ((netdev_mc_count(dev) > 63) || (dev->flags & IFF_ALLMULTI)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 /* Too many to match, or accept all multicasts. */
1858 writew(0x000B, ioaddr + AddrMode);
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001859 } else if (!netdev_mc_empty(dev)) { /* Must use the CAM filter. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 struct dev_mc_list *mclist;
Jiri Pirko48e2f182010-02-22 09:22:26 +00001861 int i = 0;
1862
1863 netdev_for_each_mc_addr(mclist, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
1865 writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
1866 ioaddr + 0x104 + i*8);
Jiri Pirko48e2f182010-02-22 09:22:26 +00001867 i++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 }
1869 /* Clear remaining entries. */
1870 for (; i < 64; i++)
1871 writel(0, ioaddr + 0x104 + i*8);
1872 writew(0x0003, ioaddr + AddrMode);
1873 } else { /* Normal, unicast/broadcast-only mode. */
1874 writew(0x0001, ioaddr + AddrMode);
1875 }
1876}
1877
1878static int check_if_running(struct net_device *dev)
1879{
1880 if (!netif_running(dev))
1881 return -EINVAL;
1882 return 0;
1883}
1884
1885static void hamachi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1886{
1887 struct hamachi_private *np = netdev_priv(dev);
1888 strcpy(info->driver, DRV_NAME);
1889 strcpy(info->version, DRV_VERSION);
1890 strcpy(info->bus_info, pci_name(np->pci_dev));
1891}
1892
1893static int hamachi_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1894{
1895 struct hamachi_private *np = netdev_priv(dev);
1896 spin_lock_irq(&np->lock);
1897 mii_ethtool_gset(&np->mii_if, ecmd);
1898 spin_unlock_irq(&np->lock);
1899 return 0;
1900}
1901
1902static int hamachi_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1903{
1904 struct hamachi_private *np = netdev_priv(dev);
1905 int res;
1906 spin_lock_irq(&np->lock);
1907 res = mii_ethtool_sset(&np->mii_if, ecmd);
1908 spin_unlock_irq(&np->lock);
1909 return res;
1910}
1911
1912static int hamachi_nway_reset(struct net_device *dev)
1913{
1914 struct hamachi_private *np = netdev_priv(dev);
1915 return mii_nway_restart(&np->mii_if);
1916}
1917
1918static u32 hamachi_get_link(struct net_device *dev)
1919{
1920 struct hamachi_private *np = netdev_priv(dev);
1921 return mii_link_ok(&np->mii_if);
1922}
1923
Jeff Garzik7282d492006-09-13 14:30:00 -04001924static const struct ethtool_ops ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 .begin = check_if_running,
1926 .get_drvinfo = hamachi_get_drvinfo,
1927 .get_settings = hamachi_get_settings,
1928 .set_settings = hamachi_set_settings,
1929 .nway_reset = hamachi_nway_reset,
1930 .get_link = hamachi_get_link,
1931};
1932
Jeff Garzik7282d492006-09-13 14:30:00 -04001933static const struct ethtool_ops ethtool_ops_no_mii = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 .begin = check_if_running,
1935 .get_drvinfo = hamachi_get_drvinfo,
1936};
1937
1938static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1939{
1940 struct hamachi_private *np = netdev_priv(dev);
1941 struct mii_ioctl_data *data = if_mii(rq);
1942 int rc;
1943
1944 if (!netif_running(dev))
1945 return -EINVAL;
1946
1947 if (cmd == (SIOCDEVPRIVATE+3)) { /* set rx,tx intr params */
1948 u32 *d = (u32 *)&rq->ifr_ifru;
1949 /* Should add this check here or an ordinary user can do nasty
1950 * things. -KDU
1951 *
1952 * TODO: Shut down the Rx and Tx engines while doing this.
1953 */
1954 if (!capable(CAP_NET_ADMIN))
1955 return -EPERM;
1956 writel(d[0], np->base + TxIntrCtrl);
1957 writel(d[1], np->base + RxIntrCtrl);
1958 printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name,
1959 (u32) readl(np->base + TxIntrCtrl),
1960 (u32) readl(np->base + RxIntrCtrl));
1961 rc = 0;
1962 }
1963
1964 else {
1965 spin_lock_irq(&np->lock);
1966 rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
1967 spin_unlock_irq(&np->lock);
1968 }
1969
1970 return rc;
1971}
1972
1973
1974static void __devexit hamachi_remove_one (struct pci_dev *pdev)
1975{
1976 struct net_device *dev = pci_get_drvdata(pdev);
1977
1978 if (dev) {
1979 struct hamachi_private *hmp = netdev_priv(dev);
1980
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001981 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 hmp->rx_ring_dma);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001983 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 hmp->tx_ring_dma);
1985 unregister_netdev(dev);
1986 iounmap(hmp->base);
1987 free_netdev(dev);
1988 pci_release_regions(pdev);
1989 pci_set_drvdata(pdev, NULL);
1990 }
1991}
1992
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00001993static DEFINE_PCI_DEVICE_TABLE(hamachi_pci_tbl) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, },
1995 { 0, }
1996};
1997MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl);
1998
1999static struct pci_driver hamachi_driver = {
2000 .name = DRV_NAME,
2001 .id_table = hamachi_pci_tbl,
2002 .probe = hamachi_init_one,
2003 .remove = __devexit_p(hamachi_remove_one),
2004};
2005
2006static int __init hamachi_init (void)
2007{
2008/* when a module, this is printed whether or not devices are found in probe */
2009#ifdef MODULE
2010 printk(version);
2011#endif
2012 return pci_register_driver(&hamachi_driver);
2013}
2014
2015static void __exit hamachi_exit (void)
2016{
2017 pci_unregister_driver(&hamachi_driver);
2018}
2019
2020
2021module_init(hamachi_init);
2022module_exit(hamachi_exit);