1 /* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */
3 Written 1998-2000 by Donald Becker.
4 Updates 2000 by Keith Underwood.
6 This software may be used and distributed according to the terms of
7 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.
13 The author may be reached as becker@scyld.com, or C/O
14 Scyld Computing Corporation
15 410 Severn Ave., Suite 210
18 This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet
21 Support and updates available at
22 http://www.scyld.com/network/hamachi.html
24 http://www.parl.clemson.edu/~keithu/hamachi.html
28 Linux kernel changelog:
31 - fix lack of pci_dev<->dev association
32 - ethtool support (jgarzik)
36 #define DRV_NAME "hamachi"
37 #define DRV_VERSION "1.01+LK1.0.1"
38 #define DRV_RELDATE "5/18/2001"
41 /* A few user-configurable values. */
43 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
45 #define hamachi_debug debug
46 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
47 static int max_interrupt_work = 40;
49 /* Default values selected by testing on a dual processor PIII-450 */
50 /* These six interrupt control parameters may be set directly when loading the
51 * module, or through the rx_params and tx_params variables
53 static int max_rx_latency = 0x11;
54 static int max_rx_gap = 0x05;
55 static int min_rx_pkt = 0x18;
56 static int max_tx_latency = 0x00;
57 static int max_tx_gap = 0x00;
58 static int min_tx_pkt = 0x30;
60 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
61 -Setting to > 1518 causes all frames to be copied
62 -Setting to 0 disables copies
64 static int rx_copybreak;
66 /* An override for the hardware detection of bus width.
67 Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit.
68 Add 2 to disable parity detection.
73 /* Used to pass the media type, etc.
74 These exist for driver interoperability.
75 No media types are currently defined.
76 - The lower 4 bits are reserved for the media type.
77 - The next three bits may be set to one of the following:
78 0x00000000 : Autodetect PCI bus
79 0x00000010 : Force 32 bit PCI bus
80 0x00000020 : Disable parity detection
81 0x00000040 : Force 64 bit PCI bus
83 - The next bit can be used to force half-duplex. This is a bad
84 idea since no known implementations implement half-duplex, and,
85 in general, half-duplex for gigabit ethernet is a bad idea.
86 0x00000080 : Force half-duplex
87 Default is full-duplex.
88 - In the original driver, the ninth bit could be used to force
89 full-duplex. Maintain that for compatibility
90 0x00000200 : Force full-duplex
92 #define MAX_UNITS 8 /* More are supported, limit only on options */
93 static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
94 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
95 /* The Hamachi chipset supports 3 parameters each for Rx and Tx
96 * interruput management. Parameters will be loaded as specified into
97 * the TxIntControl and RxIntControl registers.
99 * The registers are arranged as follows:
100 * 23 - 16 15 - 8 7 - 0
101 * _________________________________
102 * | min_pkt | max_gap | max_latency |
103 * ---------------------------------
104 * min_pkt : The minimum number of packets processed between
106 * max_gap : The maximum inter-packet gap in units of 8.192 us
107 * max_latency : The absolute time between interrupts in units of 8.192 us
110 static int rx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
111 static int tx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
113 /* Operational parameters that are set at compile time. */
115 /* Keep the ring sizes a power of two for compile efficiency.
116 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
117 Making the Tx ring too large decreases the effectiveness of channel
118 bonding and packet priority.
119 There are no ill effects from too-large receive rings, except for
120 excessive memory usage */
121 /* Empirically it appears that the Tx ring needs to be a little bigger
122 for these Gbit adapters or you get into an overrun condition really
123 easily. Also, things appear to work a bit better in back-to-back
124 configurations if the Rx ring is 8 times the size of the Tx ring
126 #define TX_RING_SIZE 64
127 #define RX_RING_SIZE 512
128 #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct hamachi_desc)
129 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct hamachi_desc)
132 * Enable netdev_ioctl. Added interrupt coalescing parameter adjustment.
133 * 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov>
136 /* play with 64-bit addrlen; seems to be a teensy bit slower --pw */
137 /* #define ADDRLEN 64 */
140 * RX_CHECKSUM turns on card-generated receive checksum generation for
141 * TCP and UDP packets. Otherwise the upper layers do the calculation.
142 * TX_CHECKSUM won't do anything too useful, even if it works. There's no
143 * easy mechanism by which to tell the TCP/UDP stack that it need not
144 * generate checksums for this device. But if somebody can find a way
145 * to get that to work, most of the card work is in here already.
146 * 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov>
151 /* Operational parameters that usually are not changed. */
152 /* Time in jiffies before concluding the transmitter is hung. */
153 #define TX_TIMEOUT (5*HZ)
155 #include <linux/module.h>
156 #include <linux/kernel.h>
157 #include <linux/sched.h>
158 #include <linux/string.h>
159 #include <linux/timer.h>
160 #include <linux/time.h>
161 #include <linux/errno.h>
162 #include <linux/ioport.h>
163 #include <linux/slab.h>
164 #include <linux/interrupt.h>
165 #include <linux/pci.h>
166 #include <linux/init.h>
167 #include <linux/ethtool.h>
168 #include <linux/mii.h>
170 #include <asm/uaccess.h>
171 #include <asm/processor.h> /* Processor type for cache alignment. */
172 #include <asm/bitops.h>
174 #include <asm/unaligned.h>
175 #include <asm/cache.h>
177 #include <linux/netdevice.h>
178 #include <linux/etherdevice.h>
179 #include <linux/skbuff.h>
180 #include <linux/ip.h>
181 #include <linux/delay.h>
183 static char version[] __initdata =
184 KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"
185 KERN_INFO " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
186 KERN_INFO " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
189 /* IP_MF appears to be only defined in <netinet/ip.h>, however,
190 we need it for hardware checksumming support. FYI... some of
191 the definitions in <netinet/ip.h> conflict/duplicate those in
192 other linux headers causing many compiler warnings.
195 #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
198 /* Define IP_OFFSET to be IPOPT_OFFSET */
201 #define IP_OFFSET IPOPT_OFFSET
207 #define RUN_AT(x) (jiffies + (x))
209 /* Condensed bus+endian portability operations. */
211 #define cpu_to_leXX(addr) cpu_to_le64(addr)
212 #define desc_to_virt(addr) bus_to_virt(le64_to_cpu(addr))
214 #define cpu_to_leXX(addr) cpu_to_le32(addr)
215 #define desc_to_virt(addr) bus_to_virt(le32_to_cpu(addr))
222 I. Board Compatibility
224 This device driver is designed for the Packet Engines "Hamachi"
225 Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
228 II. Board-specific settings
230 No jumpers exist on the board. The chip supports software correction of
231 various motherboard wiring errors, however this driver does not support
234 III. Driver operation
238 The Hamachi uses a typical descriptor based bus-master architecture.
239 The descriptor list is similar to that used by the Digital Tulip.
240 This driver uses two statically allocated fixed-size descriptor lists
241 formed into rings by a branch from the final descriptor to the beginning of
242 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
244 This driver uses a zero-copy receive and transmit scheme similar my other
246 The driver allocates full frame size skbuffs for the Rx ring buffers at
247 open() time and passes the skb->data field to the Hamachi as receive data
248 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
249 a fresh skbuff is allocated and the frame is copied to the new skbuff.
250 When the incoming frame is larger, the skbuff is passed directly up the
251 protocol stack and replaced by a newly allocated skbuff.
253 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
254 using a full-sized skbuff for small frames vs. the copying costs of larger
255 frames. Gigabit cards are typically used on generously configured machines
256 and the underfilled buffers have negligible impact compared to the benefit of
257 a single allocation size, so the default value of zero results in never
260 IIIb/c. Transmit/Receive Structure
262 The Rx and Tx descriptor structure are straight-forward, with no historical
263 baggage that must be explained. Unlike the awkward DBDMA structure, there
264 are no unused fields or option bits that had only one allowable setting.
266 Two details should be noted about the descriptors: The chip supports both 32
267 bit and 64 bit address structures, and the length field is overwritten on
268 the receive descriptors. The descriptor length is set in the control word
269 for each channel. The development driver uses 32 bit addresses only, however
270 64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
272 IIId. Synchronization
274 This driver is very similar to my other network drivers.
275 The driver runs as two independent, single-threaded flows of control. One
276 is the send-packet routine, which enforces single-threaded use by the
277 dev->tbusy flag. The other thread is the interrupt handler, which is single
278 threaded by the hardware and other software.
280 The send packet thread has partial control over the Tx ring and 'dev->tbusy'
281 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
282 queue slot is empty, it clears the tbusy flag when finished otherwise it sets
283 the 'hmp->tx_full' flag.
285 The interrupt handler has exclusive control over the Rx ring and records stats
286 from the Tx ring. After reaping the stats, it marks the Tx queue entry as
287 empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
288 clears both the tx_full and tbusy flags.
292 Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
296 Hamachi Engineering Design Specification, 5/15/97
297 (Note: This version was marked "Confidential".)
305 01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
306 to help avoid some stall conditions -- this needs further research.
308 01/15/1999 EPK Creation of the hamachi_tx function. This function cleans
309 the Tx ring and is called from hamachi_start_xmit (this used to be
310 called from hamachi_interrupt but it tends to delay execution of the
311 interrupt handler and thus reduce bandwidth by reducing the latency
312 between hamachi_rx()'s). Notably, some modification has been made so
313 that the cleaning loop checks only to make sure that the DescOwn bit
314 isn't set in the status flag since the card is not required
315 to set the entire flag to zero after processing.
317 01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
318 checked before attempting to add a buffer to the ring. If the ring is full
319 an attempt is made to free any dirty buffers and thus find space for
320 the new buffer or the function returns non-zero which should case the
321 scheduler to reschedule the buffer later.
323 01/15/1999 EPK Some adjustments were made to the chip intialization.
324 End-to-end flow control should now be fully active and the interrupt
325 algorithm vars have been changed. These could probably use further tuning.
327 01/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
328 set the rx and tx latencies for the Hamachi interrupts. If you're having
329 problems with network stalls, try setting these to higher values.
330 Valid values are 0x00 through 0xff.
332 01/15/1999 EPK In general, the overall bandwidth has increased and
333 latencies are better (sometimes by a factor of 2). Stalls are rare at
334 this point, however there still appears to be a bug somewhere between the
335 hardware and driver. TCP checksum errors under load also appear to be
336 eliminated at this point.
338 01/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
339 Rx and Tx rings. This appears to have been affecting whether a particular
340 peer-to-peer connection would hang under high load. I believe the Rx
341 rings was typically getting set correctly, but the Tx ring wasn't getting
342 the DescEndRing bit set during initialization. ??? Does this mean the
343 hamachi card is using the DescEndRing in processing even if a particular
344 slot isn't in use -- hypothetically, the card might be searching the
345 entire Tx ring for slots with the DescOwn bit set and then processing
346 them. If the DescEndRing bit isn't set, then it might just wander off
347 through memory until it hits a chunk of data with that bit set
348 and then looping back.
350 02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
351 problem (TxCmd and RxCmd need only to be set when idle or stopped.
353 02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
354 (Michel Mueller pointed out the ``permanently busy'' potential
357 02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
359 02/23/1999 EPK Verified that the interrupt status field bits for Tx were
360 incorrectly defined and corrected (as per Michel Mueller).
362 02/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
363 were available before reseting the tbusy and tx_full flags
364 (as per Michel Mueller).
366 03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
368 12/31/1999 KDU Cleaned up assorted things and added Don's code to force
371 02/20/2000 KDU Some of the control was just plain odd. Cleaned up the
372 hamachi_start_xmit() and hamachi_interrupt() code. There is still some
373 re-structuring I would like to do.
375 03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
376 parameters on a dual P3-450 setup yielded the new default interrupt
377 mitigation parameters. Tx should interrupt VERY infrequently due to
378 Eric's scheme. Rx should be more often...
380 03/13/2000 KDU Added a patch to make the Rx Checksum code interact
381 nicely with non-linux machines.
383 03/13/2000 KDU Experimented with some of the configuration values:
385 -It seems that enabling PCI performance commands for descriptors
386 (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
387 performance impact for any of my tests. (ttcp, netpipe, netperf) I will
388 leave them that way until I hear further feedback.
390 -Increasing the PCI_LATENCY_TIMER to 130
391 (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
392 degrade performance. Leaving default at 64 pending further information.
394 03/14/2000 KDU Further tuning:
396 -adjusted boguscnt in hamachi_rx() to depend on interrupt
397 mitigation parameters chosen.
399 -Selected a set of interrupt parameters based on some extensive testing.
400 These may change with more testing.
404 -Consider borrowing from the acenic driver code to check PCI_COMMAND for
405 PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
408 -fix the reset procedure. It doesn't quite work.
411 /* A few values that may be tweaked. */
412 /* Size of each temporary Rx buffer, calculated as:
413 * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
414 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
415 * 2 more because we use skb_reserve.
417 #define PKT_BUF_SZ 1538
419 /* For now, this is going to be set to the maximum size of an ethernet
420 * packet. Eventually, we may want to make it a variable that is
423 #define MAX_FRAME_SIZE 1518
425 /* The rest of these values should never change. */
427 static void hamachi_timer(unsigned long data);
429 enum capability_flags {CanHaveMII=1, };
430 static struct chip_info {
431 u16 vendor_id, device_id, device_id_mask, pad;
433 void (*media_timer)(unsigned long data);
436 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
440 /* Offsets to the Hamachi registers. Various sizes. */
441 enum hamachi_offsets {
442 TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
443 RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
444 PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
445 LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
446 TxChecksum=0x074, RxChecksum=0x076,
447 TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
448 InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
450 MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
451 /* See enum MII_offsets below. */
452 MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
453 AddrMode=0x0D0, StationAddr=0x0D2,
454 /* Gigabit AutoNegotiation. */
455 ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
456 ANLinkPartnerAbility=0x0EA,
457 EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
461 /* Offsets to the MII-mode registers. */
463 MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
467 /* Bits in the interrupt status/mask registers. */
468 enum intr_status_bits {
469 IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
470 IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
471 LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
473 /* The Hamachi Rx and Tx buffer descriptors. */
474 struct hamachi_desc {
484 /* Bits in hamachi_desc.status_n_length */
485 enum desc_status_bits {
486 DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
490 #define PRIV_ALIGN 15 /* Required alignment mask */
492 struct hamachi_private {
493 /* Descriptor rings first for alignment. Tx requires a second descriptor
495 struct hamachi_desc *rx_ring;
496 struct hamachi_desc *tx_ring;
497 struct sk_buff* rx_skbuff[RX_RING_SIZE];
498 struct sk_buff* tx_skbuff[TX_RING_SIZE];
499 dma_addr_t tx_ring_dma;
500 dma_addr_t rx_ring_dma;
501 struct net_device_stats stats;
502 struct timer_list timer; /* Media selection timer. */
503 /* Frequently used and paired value: keep adjacent for cache effect. */
506 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
507 unsigned int cur_tx, dirty_tx;
508 unsigned int rx_buf_sz; /* Based on MTU+slack. */
509 unsigned int tx_full:1; /* The Tx queue is full. */
510 unsigned int duplex_lock:1;
511 unsigned int default_port:4; /* Last dev->if_port value. */
512 /* MII transceiver section. */
513 int mii_cnt; /* MII device addresses. */
514 struct mii_if_info mii_if; /* MII lib hooks/info */
515 unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
516 u32 rx_int_var, tx_int_var; /* interrupt control variables */
517 u32 option; /* Hold on to a copy of the options */
518 struct pci_dev *pci_dev;
521 MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
522 MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
523 MODULE_LICENSE("GPL");
525 MODULE_PARM(max_interrupt_work, "i");
526 MODULE_PARM(mtu, "i");
527 MODULE_PARM(debug, "i");
528 MODULE_PARM(min_rx_pkt, "i");
529 MODULE_PARM(max_rx_gap, "i");
530 MODULE_PARM(max_rx_latency, "i");
531 MODULE_PARM(min_tx_pkt, "i");
532 MODULE_PARM(max_tx_gap, "i");
533 MODULE_PARM(max_tx_latency, "i");
534 MODULE_PARM(rx_copybreak, "i");
535 MODULE_PARM(rx_params, "1-" __MODULE_STRING(MAX_UNITS) "i");
536 MODULE_PARM(tx_params, "1-" __MODULE_STRING(MAX_UNITS) "i");
537 MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
538 MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
539 MODULE_PARM(force32, "i");
540 MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt");
541 MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)");
542 MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)");
543 MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts");
544 MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
545 MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
546 MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts");
547 MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
548 MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
549 MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames");
550 MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
551 MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
552 MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
553 MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)");
554 MODULE_PARM_DESC(force32, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)");
556 static int read_eeprom(long ioaddr, int location);
557 static int mdio_read(struct net_device *dev, int phy_id, int location);
558 static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
559 static int hamachi_open(struct net_device *dev);
560 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
561 static void hamachi_timer(unsigned long data);
562 static void hamachi_tx_timeout(struct net_device *dev);
563 static void hamachi_init_ring(struct net_device *dev);
564 static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev);
565 static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
566 static inline int hamachi_rx(struct net_device *dev);
567 static inline int hamachi_tx(struct net_device *dev);
568 static void hamachi_error(struct net_device *dev, int intr_status);
569 static int hamachi_close(struct net_device *dev);
570 static struct net_device_stats *hamachi_get_stats(struct net_device *dev);
571 static void set_rx_mode(struct net_device *dev);
574 static int __init hamachi_init_one (struct pci_dev *pdev,
575 const struct pci_device_id *ent)
577 struct hamachi_private *hmp;
578 int option, i, rx_int_var, tx_int_var, boguscnt;
579 int chip_id = ent->driver_data;
583 struct net_device *dev;
588 /* when built into the kernel, we only print version if device is found */
590 static int printed_version;
591 if (!printed_version++)
595 if (pci_enable_device(pdev)) {
600 ioaddr = pci_resource_start(pdev, 0);
601 #ifdef __alpha__ /* Really "64 bit addrs" */
602 ioaddr |= (pci_resource_start(pdev, 1) << 32);
605 pci_set_master(pdev);
607 i = pci_request_regions(pdev, DRV_NAME);
611 ioaddr = (long) ioremap(ioaddr, 0x400);
613 goto err_out_release;
615 dev = alloc_etherdev(sizeof(struct hamachi_private));
617 goto err_out_iounmap;
619 SET_MODULE_OWNER(dev);
622 printk("check that skbcopy in ip_queue_xmit isn't happening\n");
623 dev->hard_header_len += 8; /* for cksum tag */
626 for (i = 0; i < 6; i++)
627 dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i)
628 : readb(ioaddr + StationAddr + i);
630 #if ! defined(final_version)
631 if (hamachi_debug > 4)
632 for (i = 0; i < 0x10; i++)
634 read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n");
638 spin_lock_init(&hmp->lock);
640 hmp->mii_if.dev = dev;
641 hmp->mii_if.mdio_read = mdio_read;
642 hmp->mii_if.mdio_write = mdio_write;
643 hmp->mii_if.phy_id_mask = 0x1f;
644 hmp->mii_if.reg_num_mask = 0x1f;
646 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
648 goto err_out_cleardev;
649 hmp->tx_ring = (struct hamachi_desc *)ring_space;
650 hmp->tx_ring_dma = ring_dma;
652 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
654 goto err_out_unmap_tx;
655 hmp->rx_ring = (struct hamachi_desc *)ring_space;
656 hmp->rx_ring_dma = ring_dma;
658 /* Check for options being passed in */
659 option = card_idx < MAX_UNITS ? options[card_idx] : 0;
661 option = dev->mem_start;
663 /* If the bus size is misidentified, do the following. */
664 force32 = force32 ? force32 :
665 ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 );
667 writeb(force32, ioaddr + VirtualJumpers);
669 /* Hmmm, do we really need to reset the chip???. */
670 writeb(0x01, ioaddr + ChipReset);
672 /* After a reset, the clock speed measurement of the PCI bus will not
673 * be valid for a moment. Wait for a little while until it is. If
674 * it takes more than 10ms, forget it.
677 i = readb(ioaddr + PCIClkMeas);
678 for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){
680 i = readb(ioaddr + PCIClkMeas);
683 dev->base_addr = ioaddr;
685 pci_set_drvdata(pdev, dev);
687 hmp->chip_id = chip_id;
690 /* The lower four bits are the media type. */
692 hmp->option = option;
694 hmp->mii_if.full_duplex = 1;
695 else if (option & 0x080)
696 hmp->mii_if.full_duplex = 0;
697 hmp->default_port = option & 15;
698 if (hmp->default_port)
699 hmp->mii_if.force_media = 1;
701 if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
702 hmp->mii_if.full_duplex = 1;
704 /* lock the duplex mode if someone specified a value */
705 if (hmp->mii_if.full_duplex || (option & 0x080))
706 hmp->duplex_lock = 1;
708 /* Set interrupt tuning parameters */
709 max_rx_latency = max_rx_latency & 0x00ff;
710 max_rx_gap = max_rx_gap & 0x00ff;
711 min_rx_pkt = min_rx_pkt & 0x00ff;
712 max_tx_latency = max_tx_latency & 0x00ff;
713 max_tx_gap = max_tx_gap & 0x00ff;
714 min_tx_pkt = min_tx_pkt & 0x00ff;
716 rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1;
717 tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1;
718 hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var :
719 (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency);
720 hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var :
721 (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency);
724 /* The Hamachi-specific entries in the device structure. */
725 dev->open = &hamachi_open;
726 dev->hard_start_xmit = &hamachi_start_xmit;
727 dev->stop = &hamachi_close;
728 dev->get_stats = &hamachi_get_stats;
729 dev->set_multicast_list = &set_rx_mode;
730 dev->do_ioctl = &netdev_ioctl;
731 dev->tx_timeout = &hamachi_tx_timeout;
732 dev->watchdog_timeo = TX_TIMEOUT;
736 i = register_netdev(dev);
739 goto err_out_unmap_rx;
742 printk(KERN_INFO "%s: %s type %x at 0x%lx, ",
743 dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
745 for (i = 0; i < 5; i++)
746 printk("%2.2x:", dev->dev_addr[i]);
747 printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
748 i = readb(ioaddr + PCIClkMeas);
749 printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
750 "%2.2x, LPA %4.4x.\n",
751 dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
752 i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
753 readw(ioaddr + ANLinkPartnerAbility));
755 if (chip_tbl[hmp->chip_id].flags & CanHaveMII) {
756 int phy, phy_idx = 0;
757 for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
758 int mii_status = mdio_read(dev, phy, MII_BMSR);
759 if (mii_status != 0xffff &&
760 mii_status != 0x0000) {
761 hmp->phys[phy_idx++] = phy;
762 hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
763 printk(KERN_INFO "%s: MII PHY found at address %d, status "
764 "0x%4.4x advertising %4.4x.\n",
765 dev->name, phy, mii_status, hmp->mii_if.advertising);
768 hmp->mii_cnt = phy_idx;
769 if (hmp->mii_cnt > 0)
770 hmp->mii_if.phy_id = hmp->phys[0];
772 memset(&hmp->mii_if, 0, sizeof(hmp->mii_if));
774 /* Configure gigabit autonegotiation. */
775 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
776 writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */
777 writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */
783 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
786 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
791 iounmap((char *)ioaddr);
793 pci_release_regions(pdev);
798 static int __init read_eeprom(long ioaddr, int location)
800 int bogus_cnt = 1000;
802 /* We should check busy first - per docs -KDU */
803 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
804 writew(location, ioaddr + EEAddr);
805 writeb(0x02, ioaddr + EECmdStatus);
807 while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
808 if (hamachi_debug > 5)
809 printk(" EEPROM status is %2.2x after %d ticks.\n",
810 (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
811 return readb(ioaddr + EEData);
814 /* MII Managemen Data I/O accesses.
815 These routines assume the MDIO controller is idle, and do not exit until
816 the command is finished. */
818 static int mdio_read(struct net_device *dev, int phy_id, int location)
820 long ioaddr = dev->base_addr;
823 /* We should check busy first - per docs -KDU */
824 for (i = 10000; i >= 0; i--)
825 if ((readw(ioaddr + MII_Status) & 1) == 0)
827 writew((phy_id<<8) + location, ioaddr + MII_Addr);
828 writew(0x0001, ioaddr + MII_Cmd);
829 for (i = 10000; i >= 0; i--)
830 if ((readw(ioaddr + MII_Status) & 1) == 0)
832 return readw(ioaddr + MII_Rd_Data);
835 static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
837 long ioaddr = dev->base_addr;
840 /* We should check busy first - per docs -KDU */
841 for (i = 10000; i >= 0; i--)
842 if ((readw(ioaddr + MII_Status) & 1) == 0)
844 writew((phy_id<<8) + location, ioaddr + MII_Addr);
845 writew(value, ioaddr + MII_Wr_Data);
847 /* Wait for the command to finish. */
848 for (i = 10000; i >= 0; i--)
849 if ((readw(ioaddr + MII_Status) & 1) == 0)
855 static int hamachi_open(struct net_device *dev)
857 struct hamachi_private *hmp = dev->priv;
858 long ioaddr = dev->base_addr;
860 u32 rx_int_var, tx_int_var;
863 i = request_irq(dev->irq, &hamachi_interrupt, SA_SHIRQ, dev->name, dev);
867 if (hamachi_debug > 1)
868 printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
869 dev->name, dev->irq);
871 hamachi_init_ring(dev);
874 /* writellll anyone ? */
875 writel(cpu_to_le64(hmp->rx_ring_dma), ioaddr + RxPtr);
876 writel(cpu_to_le64(hmp->rx_ring_dma) >> 32, ioaddr + RxPtr + 4);
877 writel(cpu_to_le64(hmp->tx_ring_dma), ioaddr + TxPtr);
878 writel(cpu_to_le64(hmp->tx_ring_dma) >> 32, ioaddr + TxPtr + 4);
880 writel(cpu_to_le32(hmp->rx_ring_dma), ioaddr + RxPtr);
881 writel(cpu_to_le32(hmp->tx_ring_dma), ioaddr + TxPtr);
884 /* TODO: It would make sense to organize this as words since the card
885 * documentation does. -KDU
887 for (i = 0; i < 6; i++)
888 writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
890 /* Initialize other registers: with so many this eventually this will
891 converted to an offset/value list. */
893 /* Configure the FIFO */
894 fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
898 writew(0x0000, ioaddr + FIFOcfg);
901 /* Configure the FIFO for 512K external, 16K used for Tx. */
902 writew(0x0028, ioaddr + FIFOcfg);
905 /* Configure the FIFO for 1024 external, 32K used for Tx. */
906 writew(0x004C, ioaddr + FIFOcfg);
909 /* Configure the FIFO for 2048 external, 32K used for Tx. */
910 writew(0x006C, ioaddr + FIFOcfg);
913 printk(KERN_WARNING "%s: Unsupported external memory config!\n",
915 /* Default to no FIFO */
916 writew(0x0000, ioaddr + FIFOcfg);
920 if (dev->if_port == 0)
921 dev->if_port = hmp->default_port;
924 /* Setting the Rx mode will start the Rx process. */
925 /* If someone didn't choose a duplex, default to full-duplex */
926 if (hmp->duplex_lock != 1)
927 hmp->mii_if.full_duplex = 1;
929 /* always 1, takes no more time to do it */
930 writew(0x0001, ioaddr + RxChecksum);
932 writew(0x0001, ioaddr + TxChecksum);
934 writew(0x0000, ioaddr + TxChecksum);
936 writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
937 writew(0x215F, ioaddr + MACCnfg);
938 writew(0x000C, ioaddr + FrameGap0);
939 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
940 writew(0x1018, ioaddr + FrameGap1);
941 /* Why do we enable receives/transmits here? -KDU */
942 writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
943 /* Enable automatic generation of flow control frames, period 0xffff. */
944 writel(0x0030FFFF, ioaddr + FlowCtrl);
945 writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
947 /* Enable legacy links. */
948 writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
949 /* Initial Link LED to blinking red. */
950 writeb(0x03, ioaddr + LEDCtrl);
952 /* Configure interrupt mitigation. This has a great effect on
953 performance, so systems tuning should start here!. */
955 rx_int_var = hmp->rx_int_var;
956 tx_int_var = hmp->tx_int_var;
958 if (hamachi_debug > 1) {
959 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
960 tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
961 (tx_int_var & 0x00ff0000) >> 16);
962 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
963 rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
964 (rx_int_var & 0x00ff0000) >> 16);
965 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
968 writel(tx_int_var, ioaddr + TxIntrCtrl);
969 writel(rx_int_var, ioaddr + RxIntrCtrl);
973 netif_start_queue(dev);
975 /* Enable interrupts by setting the interrupt mask. */
976 writel(0x80878787, ioaddr + InterruptEnable);
977 writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
979 /* Configure and start the DMA channels. */
980 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
982 writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
983 writew(0x005D, ioaddr + TxDMACtrl);
985 writew(0x001D, ioaddr + RxDMACtrl);
986 writew(0x001D, ioaddr + TxDMACtrl);
988 writew(0x0001, dev->base_addr + RxCmd);
990 if (hamachi_debug > 2) {
991 printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
992 dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
994 /* Set the timer to check for link beat. */
995 init_timer(&hmp->timer);
996 hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
997 hmp->timer.data = (unsigned long)dev;
998 hmp->timer.function = &hamachi_timer; /* timer handler */
999 add_timer(&hmp->timer);
1004 static inline int hamachi_tx(struct net_device *dev)
1006 struct hamachi_private *hmp = dev->priv;
1008 /* Update the dirty pointer until we find an entry that is
1009 still owned by the card */
1010 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
1011 int entry = hmp->dirty_tx % TX_RING_SIZE;
1012 struct sk_buff *skb;
1014 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
1016 /* Free the original skb. */
1017 skb = hmp->tx_skbuff[entry];
1019 pci_unmap_single(hmp->pci_dev,
1020 hmp->tx_ring[entry].addr, skb->len,
1023 hmp->tx_skbuff[entry] = 0;
1025 hmp->tx_ring[entry].status_n_length = 0;
1026 if (entry >= TX_RING_SIZE-1)
1027 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
1028 cpu_to_le32(DescEndRing);
1029 hmp->stats.tx_packets++;
1035 static void hamachi_timer(unsigned long data)
1037 struct net_device *dev = (struct net_device *)data;
1038 struct hamachi_private *hmp = dev->priv;
1039 long ioaddr = dev->base_addr;
1040 int next_tick = 10*HZ;
1042 if (hamachi_debug > 2) {
1043 printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
1044 "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
1045 readw(ioaddr + ANLinkPartnerAbility));
1046 printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1047 "%4.4x %4.4x %4.4x.\n", dev->name,
1048 readw(ioaddr + 0x0e0),
1049 readw(ioaddr + 0x0e2),
1050 readw(ioaddr + 0x0e4),
1051 readw(ioaddr + 0x0e6),
1052 readw(ioaddr + 0x0e8),
1053 readw(ioaddr + 0x0eA));
1055 /* We could do something here... nah. */
1056 hmp->timer.expires = RUN_AT(next_tick);
1057 add_timer(&hmp->timer);
1060 static void hamachi_tx_timeout(struct net_device *dev)
1063 struct hamachi_private *hmp = dev->priv;
1064 long ioaddr = dev->base_addr;
1066 printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
1067 " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
1071 printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
1072 for (i = 0; i < RX_RING_SIZE; i++)
1073 printk(" %8.8x", (unsigned int)hmp->rx_ring[i].status_n_length);
1074 printk("\n"KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
1075 for (i = 0; i < TX_RING_SIZE; i++)
1076 printk(" %4.4x", hmp->tx_ring[i].status_n_length);
1080 /* Reinit the hardware and make sure the Rx and Tx processes
1084 /* The right way to do Reset. -KDU
1085 * -Clear OWN bit in all Rx/Tx descriptors
1086 * -Wait 50 uS for channels to go idle
1087 * -Turn off MAC receiver
1091 for (i = 0; i < RX_RING_SIZE; i++)
1092 hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
1094 /* Presume that all packets in the Tx queue are gone if we have to
1095 * re-init the hardware.
1097 for (i = 0; i < TX_RING_SIZE; i++){
1098 struct sk_buff *skb;
1100 if (i >= TX_RING_SIZE - 1)
1101 hmp->tx_ring[i].status_n_length = cpu_to_le32(
1103 (hmp->tx_ring[i].status_n_length & 0x0000FFFF));
1105 hmp->tx_ring[i].status_n_length &= 0x0000ffff;
1106 skb = hmp->tx_skbuff[i];
1108 pci_unmap_single(hmp->pci_dev, hmp->tx_ring[i].addr,
1109 skb->len, PCI_DMA_TODEVICE);
1111 hmp->tx_skbuff[i] = 0;
1115 udelay(60); /* Sleep 60 us just for safety sake */
1116 writew(0x0002, dev->base_addr + RxCmd); /* STOP Rx */
1118 writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
1121 hmp->cur_rx = hmp->cur_tx = 0;
1122 hmp->dirty_rx = hmp->dirty_tx = 0;
1123 /* Rx packets are also presumed lost; however, we need to make sure a
1124 * ring of buffers is in tact. -KDU
1126 for (i = 0; i < RX_RING_SIZE; i++){
1127 struct sk_buff *skb = hmp->rx_skbuff[i];
1130 pci_unmap_single(hmp->pci_dev, hmp->rx_ring[i].addr,
1131 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1133 hmp->rx_skbuff[i] = 0;
1136 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1137 for (i = 0; i < RX_RING_SIZE; i++) {
1138 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1139 hmp->rx_skbuff[i] = skb;
1142 skb->dev = dev; /* Mark as being used by this device. */
1143 skb_reserve(skb, 2); /* 16 byte align the IP header. */
1144 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
1145 skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
1146 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
1147 DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
1149 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1150 /* Mark the last entry as wrapping the ring. */
1151 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1153 /* Trigger an immediate transmit demand. */
1154 dev->trans_start = jiffies;
1155 hmp->stats.tx_errors++;
1157 /* Restart the chip's Tx/Rx processes . */
1158 writew(0x0002, dev->base_addr + TxCmd); /* STOP Tx */
1159 writew(0x0001, dev->base_addr + TxCmd); /* START Tx */
1160 writew(0x0001, dev->base_addr + RxCmd); /* START Rx */
1162 netif_wake_queue(dev);
1166 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1167 static void hamachi_init_ring(struct net_device *dev)
1169 struct hamachi_private *hmp = dev->priv;
1173 hmp->cur_rx = hmp->cur_tx = 0;
1174 hmp->dirty_rx = hmp->dirty_tx = 0;
1177 /* This is wrong. I'm not sure what the original plan was, but this
1178 * is wrong. An MTU of 1 gets you a buffer of 1536, while an MTU
1179 * of 1501 gets a buffer of 1533? -KDU
1181 hmp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
1183 /* My attempt at a reasonable correction */
1184 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1185 * card needs room to do 8 byte alignment, +2 so we can reserve
1186 * the first 2 bytes, and +16 gets room for the status word from the
1189 hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
1190 (((dev->mtu+26+7) & ~7) + 2 + 16));
1192 /* Initialize all Rx descriptors. */
1193 for (i = 0; i < RX_RING_SIZE; i++) {
1194 hmp->rx_ring[i].status_n_length = 0;
1195 hmp->rx_skbuff[i] = 0;
1197 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1198 for (i = 0; i < RX_RING_SIZE; i++) {
1199 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1200 hmp->rx_skbuff[i] = skb;
1203 skb->dev = dev; /* Mark as being used by this device. */
1204 skb_reserve(skb, 2); /* 16 byte align the IP header. */
1205 hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
1206 skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
1207 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
1208 hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
1209 DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
1211 hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
1212 hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1214 for (i = 0; i < TX_RING_SIZE; i++) {
1215 hmp->tx_skbuff[i] = 0;
1216 hmp->tx_ring[i].status_n_length = 0;
1218 /* Mark the last entry of the ring */
1219 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
1226 #define csum_add(it, val) \
1228 it += (u16) (val); \
1229 if (it & 0xffff0000) { \
1234 /* printk("add %04x --> %04x\n", val, it); \ */
1236 /* uh->len already network format, do not swap */
1237 #define pseudo_csum_udp(sum,ih,uh) do { \
1239 csum_add(sum, (ih)->saddr >> 16); \
1240 csum_add(sum, (ih)->saddr & 0xffff); \
1241 csum_add(sum, (ih)->daddr >> 16); \
1242 csum_add(sum, (ih)->daddr & 0xffff); \
1243 csum_add(sum, __constant_htons(IPPROTO_UDP)); \
1244 csum_add(sum, (uh)->len); \
1248 #define pseudo_csum_tcp(sum,ih,len) do { \
1250 csum_add(sum, (ih)->saddr >> 16); \
1251 csum_add(sum, (ih)->saddr & 0xffff); \
1252 csum_add(sum, (ih)->daddr >> 16); \
1253 csum_add(sum, (ih)->daddr & 0xffff); \
1254 csum_add(sum, __constant_htons(IPPROTO_TCP)); \
1255 csum_add(sum, htons(len)); \
1259 static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev)
1261 struct hamachi_private *hmp = dev->priv;
1265 /* Ok, now make sure that the queue has space before trying to
1266 add another skbuff. if we return non-zero the scheduler
1267 should interpret this as a queue full and requeue the buffer
1271 /* We should NEVER reach this point -KDU */
1272 printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
1274 /* Wake the potentially-idle transmit channel. */
1275 /* If we don't need to read status, DON'T -KDU */
1276 status=readw(dev->base_addr + TxStatus);
1277 if( !(status & 0x0001) || (status & 0x0002))
1278 writew(0x0001, dev->base_addr + TxCmd);
1282 /* Caution: the write order is important here, set the field
1283 with the "ownership" bits last. */
1285 /* Calculate the next Tx descriptor entry. */
1286 entry = hmp->cur_tx % TX_RING_SIZE;
1288 hmp->tx_skbuff[entry] = skb;
1292 /* tack on checksum tag */
1294 struct ethhdr *eh = (struct ethhdr *)skb->data;
1295 if (eh->h_proto == __constant_htons(ETH_P_IP)) {
1296 struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
1297 if (ih->protocol == IPPROTO_UDP) {
1299 = (struct udphdr *)((char *)ih + ih->ihl*4);
1300 u32 offset = ((unsigned char *)uh + 6) - skb->data;
1302 pseudo_csum_udp(pseudo, ih, uh);
1303 pseudo = htons(pseudo);
1304 printk("udp cksum was %04x, sending pseudo %04x\n",
1306 uh->check = 0; /* zero out uh->check before card calc */
1308 * start at 14 (skip ethhdr), store at offset (uh->check),
1309 * use pseudo value given.
1311 tagval = (14 << 24) | (offset << 16) | pseudo;
1312 } else if (ih->protocol == IPPROTO_TCP) {
1313 printk("tcp, no auto cksum\n");
1316 *(u32 *)skb_push(skb, 8) = tagval;
1320 hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
1321 skb->data, skb->len, PCI_DMA_TODEVICE));
1323 /* Hmmmm, could probably put a DescIntr on these, but the way
1324 the driver is currently coded makes Tx interrupts unnecessary
1325 since the clearing of the Tx ring is handled by the start_xmit
1326 routine. This organization helps mitigate the interrupts a
1327 bit and probably renders the max_tx_latency param useless.
1329 Update: Putting a DescIntr bit on all of the descriptors and
1330 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1332 if (entry >= TX_RING_SIZE-1) /* Wrap ring */
1333 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1334 DescEndPacket | DescEndRing | DescIntr | skb->len);
1336 hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
1337 DescEndPacket | DescIntr | skb->len);
1340 /* Non-x86 Todo: explicitly flush cache lines here. */
1342 /* Wake the potentially-idle transmit channel. */
1343 /* If we don't need to read status, DON'T -KDU */
1344 status=readw(dev->base_addr + TxStatus);
1345 if( !(status & 0x0001) || (status & 0x0002))
1346 writew(0x0001, dev->base_addr + TxCmd);
1348 /* Immediately before returning, let's clear as many entries as we can. */
1351 /* We should kick the bottom half here, since we are not accepting
1352 * interrupts with every packet. i.e. realize that Gigabit ethernet
1353 * can transmit faster than ordinary machines can load packets;
1354 * hence, any packet that got put off because we were in the transmit
1355 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1357 if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
1358 netif_wake_queue(dev); /* Typical path */
1361 netif_stop_queue(dev);
1363 dev->trans_start = jiffies;
1365 if (hamachi_debug > 4) {
1366 printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n",
1367 dev->name, hmp->cur_tx, entry);
1372 /* The interrupt handler does all of the Rx thread work and cleans up
1373 after the Tx thread. */
1374 static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *rgs)
1376 struct net_device *dev = dev_instance;
1377 struct hamachi_private *hmp;
1378 long ioaddr, boguscnt = max_interrupt_work;
1380 #ifndef final_version /* Can never occur. */
1382 printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
1387 ioaddr = dev->base_addr;
1389 spin_lock(&hmp->lock);
1392 u32 intr_status = readl(ioaddr + InterruptClear);
1394 if (hamachi_debug > 4)
1395 printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
1396 dev->name, intr_status);
1398 if (intr_status == 0)
1401 if (intr_status & IntrRxDone)
1404 if (intr_status & IntrTxDone){
1405 /* This code should RARELY need to execute. After all, this is
1406 * a gigabit link, it should consume packets as fast as we put
1407 * them in AND we clear the Tx ring in hamachi_start_xmit().
1410 for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){
1411 int entry = hmp->dirty_tx % TX_RING_SIZE;
1412 struct sk_buff *skb;
1414 if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
1416 skb = hmp->tx_skbuff[entry];
1417 /* Free the original skb. */
1419 pci_unmap_single(hmp->pci_dev,
1420 hmp->tx_ring[entry].addr,
1423 dev_kfree_skb_irq(skb);
1424 hmp->tx_skbuff[entry] = 0;
1426 hmp->tx_ring[entry].status_n_length = 0;
1427 if (entry >= TX_RING_SIZE-1)
1428 hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
1429 cpu_to_le32(DescEndRing);
1430 hmp->stats.tx_packets++;
1432 if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){
1433 /* The ring is no longer full */
1435 netif_wake_queue(dev);
1438 netif_wake_queue(dev);
1443 /* Abnormal error summary/uncommon events handlers. */
1445 (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
1446 LinkChange | NegotiationChange | StatsMax))
1447 hamachi_error(dev, intr_status);
1449 if (--boguscnt < 0) {
1450 printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n",
1451 dev->name, intr_status);
1456 if (hamachi_debug > 3)
1457 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1458 dev->name, readl(ioaddr + IntrStatus));
1460 #ifndef final_version
1461 /* Code that should never be run! Perhaps remove after testing.. */
1463 static int stopit = 10;
1464 if (dev->start == 0 && --stopit < 0) {
1465 printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
1472 spin_unlock(&hmp->lock);
1475 /* This routine is logically part of the interrupt handler, but seperated
1476 for clarity and better register allocation. */
1477 static int hamachi_rx(struct net_device *dev)
1479 struct hamachi_private *hmp = dev->priv;
1480 int entry = hmp->cur_rx % RX_RING_SIZE;
1481 int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx;
1483 if (hamachi_debug > 4) {
1484 printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
1485 entry, hmp->rx_ring[entry].status_n_length);
1488 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1490 struct hamachi_desc *desc = &(hmp->rx_ring[entry]);
1491 u32 desc_status = le32_to_cpu(desc->status_n_length);
1492 u16 data_size = desc_status; /* Implicit truncate */
1496 if (desc_status & DescOwn)
1498 pci_dma_sync_single(hmp->pci_dev, desc->addr, hmp->rx_buf_sz,
1499 PCI_DMA_FROMDEVICE);
1500 buf_addr = desc_to_virt(desc->addr);
1501 frame_status = le32_to_cpu(get_unaligned((s32*)&(buf_addr[data_size - 12])));
1502 if (hamachi_debug > 4)
1503 printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n",
1507 if ( ! (desc_status & DescEndPacket)) {
1508 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1509 "multiple buffers, entry %#x length %d status %4.4x!\n",
1510 dev->name, hmp->cur_rx, data_size, desc_status);
1511 printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
1512 dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
1513 printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1515 hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0xffff0000,
1516 hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0x0000ffff,
1517 hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length);
1518 hmp->stats.rx_length_errors++;
1519 } /* else Omit for prototype errata??? */
1520 if (frame_status & 0x00380000) {
1521 /* There was an error. */
1522 if (hamachi_debug > 2)
1523 printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n",
1525 hmp->stats.rx_errors++;
1526 if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
1527 if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
1528 if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
1529 if (frame_status < 0) hmp->stats.rx_dropped++;
1531 struct sk_buff *skb;
1533 u16 pkt_len = (frame_status & 0x07ff) - 4;
1535 u32 pfck = *(u32 *) &buf_addr[data_size - 8];
1539 #ifndef final_version
1540 if (hamachi_debug > 4)
1541 printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d"
1542 " of %d, bogus_cnt %d.\n",
1543 pkt_len, data_size, boguscnt);
1544 if (hamachi_debug > 5)
1545 printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1547 *(s32*)&(buf_addr[data_size - 20]),
1548 *(s32*)&(buf_addr[data_size - 16]),
1549 *(s32*)&(buf_addr[data_size - 12]),
1550 *(s32*)&(buf_addr[data_size - 8]),
1551 *(s32*)&(buf_addr[data_size - 4]));
1553 /* Check if the packet is long enough to accept without copying
1554 to a minimally-sized skbuff. */
1555 if (pkt_len < rx_copybreak
1556 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1558 printk(KERN_ERR "%s: rx_copybreak non-zero "
1559 "not good with RX_CHECKSUM\n", dev->name);
1562 skb_reserve(skb, 2); /* 16 byte align the IP header */
1563 /* Call copy + cksum if available. */
1564 #if 1 || USE_IP_COPYSUM
1565 eth_copy_and_sum(skb,
1566 hmp->rx_skbuff[entry]->data, pkt_len, 0);
1567 skb_put(skb, pkt_len);
1569 memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma
1570 + entry*sizeof(*desc), pkt_len);
1573 pci_unmap_single(hmp->pci_dev,
1574 hmp->rx_ring[entry].addr,
1575 hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1576 skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
1577 hmp->rx_skbuff[entry] = NULL;
1579 skb->protocol = eth_type_trans(skb, dev);
1583 /* TCP or UDP on ipv4, DIX encoding */
1584 if (pfck>>24 == 0x91 || pfck>>24 == 0x51) {
1585 struct iphdr *ih = (struct iphdr *) skb->data;
1586 /* Check that IP packet is at least 46 bytes, otherwise,
1587 * there may be pad bytes included in the hardware checksum.
1588 * This wouldn't happen if everyone padded with 0.
1590 if (ntohs(ih->tot_len) >= 46){
1591 /* don't worry about frags */
1592 if (!(ih->frag_off & __constant_htons(IP_MF|IP_OFFSET))) {
1593 u32 inv = *(u32 *) &buf_addr[data_size - 16];
1594 u32 *p = (u32 *) &buf_addr[data_size - 20];
1595 register u32 crc, p_r, p_r1;
1605 crc = (p_r & 0xffff) + (p_r >> 16);
1608 crc = (p_r >> 16) + (p_r & 0xffff)
1609 + (p_r1 >> 16 & 0xff00);
1612 crc = p_r + (p_r1 >> 16);
1615 crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16);
1617 default: /*NOTREACHED*/ crc = 0;
1619 if (crc & 0xffff0000) {
1623 /* tcp/udp will add in pseudo */
1624 skb->csum = ntohs(pfck & 0xffff);
1625 if (skb->csum > crc)
1628 skb->csum += (~crc & 0xffff);
1630 * could do the pseudo myself and return
1631 * CHECKSUM_UNNECESSARY
1633 skb->ip_summed = CHECKSUM_HW;
1637 #endif /* RX_CHECKSUM */
1640 dev->last_rx = jiffies;
1641 hmp->stats.rx_packets++;
1643 entry = (++hmp->cur_rx) % RX_RING_SIZE;
1646 /* Refill the Rx ring buffers. */
1647 for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
1648 struct hamachi_desc *desc;
1650 entry = hmp->dirty_rx % RX_RING_SIZE;
1651 desc = &(hmp->rx_ring[entry]);
1652 if (hmp->rx_skbuff[entry] == NULL) {
1653 struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
1655 hmp->rx_skbuff[entry] = skb;
1657 break; /* Better luck next round. */
1658 skb->dev = dev; /* Mark as being used by this device. */
1659 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1660 desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
1661 skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
1663 desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
1664 if (entry >= RX_RING_SIZE-1)
1665 desc->status_n_length |= cpu_to_le32(DescOwn |
1666 DescEndPacket | DescEndRing | DescIntr);
1668 desc->status_n_length |= cpu_to_le32(DescOwn |
1669 DescEndPacket | DescIntr);
1672 /* Restart Rx engine if stopped. */
1673 /* If we don't need to check status, don't. -KDU */
1674 if (readw(dev->base_addr + RxStatus) & 0x0002)
1675 writew(0x0001, dev->base_addr + RxCmd);
1680 /* This is more properly named "uncommon interrupt events", as it covers more
1681 than just errors. */
1682 static void hamachi_error(struct net_device *dev, int intr_status)
1684 long ioaddr = dev->base_addr;
1685 struct hamachi_private *hmp = dev->priv;
1687 if (intr_status & (LinkChange|NegotiationChange)) {
1688 if (hamachi_debug > 1)
1689 printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
1690 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1691 dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
1692 readw(ioaddr + ANLinkPartnerAbility),
1693 readl(ioaddr + IntrStatus));
1694 if (readw(ioaddr + ANStatus) & 0x20)
1695 writeb(0x01, ioaddr + LEDCtrl);
1697 writeb(0x03, ioaddr + LEDCtrl);
1699 if (intr_status & StatsMax) {
1700 hamachi_get_stats(dev);
1701 /* Read the overflow bits to clear. */
1702 readl(ioaddr + 0x370);
1703 readl(ioaddr + 0x3F0);
1705 if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone))
1707 printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
1708 dev->name, intr_status);
1709 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1710 if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
1711 hmp->stats.tx_fifo_errors++;
1712 if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
1713 hmp->stats.rx_fifo_errors++;
1716 static int hamachi_close(struct net_device *dev)
1718 long ioaddr = dev->base_addr;
1719 struct hamachi_private *hmp = dev->priv;
1720 struct sk_buff *skb;
1723 netif_stop_queue(dev);
1725 if (hamachi_debug > 1) {
1726 printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1727 dev->name, readw(ioaddr + TxStatus),
1728 readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
1729 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1730 dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
1733 /* Disable interrupts by clearing the interrupt mask. */
1734 writel(0x0000, ioaddr + InterruptEnable);
1736 /* Stop the chip's Tx and Rx processes. */
1737 writel(2, ioaddr + RxCmd);
1738 writew(2, ioaddr + TxCmd);
1741 if (hamachi_debug > 2) {
1742 printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
1743 (int)hmp->tx_ring_dma);
1744 for (i = 0; i < TX_RING_SIZE; i++)
1745 printk(" %c #%d desc. %8.8x %8.8x.\n",
1746 readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
1747 i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
1748 printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
1749 (int)hmp->rx_ring_dma);
1750 for (i = 0; i < RX_RING_SIZE; i++) {
1751 printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
1752 readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
1753 i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
1754 if (hamachi_debug > 6) {
1755 if (*(u8*)hmp->rx_skbuff[i]->tail != 0x69) {
1757 hmp->rx_skbuff[i]->tail;
1760 for (j = 0; j < 0x50; j++)
1761 printk(" %4.4x", addr[j]);
1767 #endif /* __i386__ debugging only */
1769 free_irq(dev->irq, dev);
1771 del_timer_sync(&hmp->timer);
1773 /* Free all the skbuffs in the Rx queue. */
1774 for (i = 0; i < RX_RING_SIZE; i++) {
1775 skb = hmp->rx_skbuff[i];
1776 hmp->rx_ring[i].status_n_length = 0;
1777 hmp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
1779 pci_unmap_single(hmp->pci_dev,
1780 hmp->rx_ring[i].addr, hmp->rx_buf_sz,
1781 PCI_DMA_FROMDEVICE);
1783 hmp->rx_skbuff[i] = 0;
1786 for (i = 0; i < TX_RING_SIZE; i++) {
1787 skb = hmp->tx_skbuff[i];
1789 pci_unmap_single(hmp->pci_dev,
1790 hmp->tx_ring[i].addr, skb->len,
1793 hmp->tx_skbuff[i] = 0;
1797 writeb(0x00, ioaddr + LEDCtrl);
1802 static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
1804 long ioaddr = dev->base_addr;
1805 struct hamachi_private *hmp = dev->priv;
1807 /* We should lock this segment of code for SMP eventually, although
1808 the vulnerability window is very small and statistics are
1810 /* Ok, what goes here? This appears to be stuck at 21 packets
1811 according to ifconfig. It does get incremented in hamachi_tx(),
1812 so I think I'll comment it out here and see if better things
1815 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1817 hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
1818 hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
1819 hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
1821 hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
1822 hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
1823 hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
1824 hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
1825 hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
1830 static void set_rx_mode(struct net_device *dev)
1832 long ioaddr = dev->base_addr;
1834 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1835 /* Unconditionally log net taps. */
1836 printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
1837 writew(0x000F, ioaddr + AddrMode);
1838 } else if ((dev->mc_count > 63) || (dev->flags & IFF_ALLMULTI)) {
1839 /* Too many to match, or accept all multicasts. */
1840 writew(0x000B, ioaddr + AddrMode);
1841 } else if (dev->mc_count > 0) { /* Must use the CAM filter. */
1842 struct dev_mc_list *mclist;
1844 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1845 i++, mclist = mclist->next) {
1846 writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
1847 writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
1848 ioaddr + 0x104 + i*8);
1850 /* Clear remaining entries. */
1852 writel(0, ioaddr + 0x104 + i*8);
1853 writew(0x0003, ioaddr + AddrMode);
1854 } else { /* Normal, unicast/broadcast-only mode. */
1855 writew(0x0001, ioaddr + AddrMode);
1859 static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr)
1861 struct hamachi_private *np = dev->priv;
1864 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1868 case ETHTOOL_GDRVINFO: {
1869 struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
1870 strcpy(info.driver, DRV_NAME);
1871 strcpy(info.version, DRV_VERSION);
1872 strcpy(info.bus_info, np->pci_dev->slot_name);
1873 if (copy_to_user(useraddr, &info, sizeof(info)))
1879 case ETHTOOL_GSET: {
1880 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
1881 if (!(chip_tbl[np->chip_id].flags & CanHaveMII))
1883 spin_lock_irq(&np->lock);
1884 mii_ethtool_gset(&np->mii_if, &ecmd);
1885 spin_unlock_irq(&np->lock);
1886 if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
1891 case ETHTOOL_SSET: {
1893 struct ethtool_cmd ecmd;
1894 if (!(chip_tbl[np->chip_id].flags & CanHaveMII))
1896 if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
1898 spin_lock_irq(&np->lock);
1899 r = mii_ethtool_sset(&np->mii_if, &ecmd);
1900 spin_unlock_irq(&np->lock);
1903 /* restart autonegotiation */
1904 case ETHTOOL_NWAY_RST: {
1905 if (!(chip_tbl[np->chip_id].flags & CanHaveMII))
1907 return mii_nway_restart(&np->mii_if);
1909 /* get link status */
1910 case ETHTOOL_GLINK: {
1911 struct ethtool_value edata = {ETHTOOL_GLINK};
1912 if (!(chip_tbl[np->chip_id].flags & CanHaveMII))
1914 edata.data = mii_link_ok(&np->mii_if);
1915 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1924 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1926 struct hamachi_private *np = dev->priv;
1927 struct mii_ioctl_data *data = (struct mii_ioctl_data *) & rq->ifr_data;
1930 if (!netif_running(dev))
1933 if (cmd == SIOCETHTOOL)
1934 rc = netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
1936 else if (cmd == (SIOCDEVPRIVATE+3)) { /* set rx,tx intr params */
1937 u32 *d = (u32 *)&rq->ifr_data;
1938 /* Should add this check here or an ordinary user can do nasty
1941 * TODO: Shut down the Rx and Tx engines while doing this.
1943 if (!capable(CAP_NET_ADMIN))
1945 writel(d[0], dev->base_addr + TxIntrCtrl);
1946 writel(d[1], dev->base_addr + RxIntrCtrl);
1947 printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name,
1948 (u32) readl(dev->base_addr + TxIntrCtrl),
1949 (u32) readl(dev->base_addr + RxIntrCtrl));
1954 spin_lock_irq(&np->lock);
1955 rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
1956 spin_unlock_irq(&np->lock);
1963 static void __devexit hamachi_remove_one (struct pci_dev *pdev)
1965 struct net_device *dev = pci_get_drvdata(pdev);
1967 /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
1969 struct hamachi_private *hmp = dev->priv;
1971 pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
1973 pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
1975 unregister_netdev(dev);
1976 iounmap((char *)dev->base_addr);
1978 pci_release_regions(pdev);
1979 pci_set_drvdata(pdev, NULL);
1983 static struct pci_device_id hamachi_pci_tbl[] __initdata = {
1984 { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, },
1987 MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl);
1989 static struct pci_driver hamachi_driver = {
1991 .id_table = hamachi_pci_tbl,
1992 .probe = hamachi_init_one,
1993 .remove = __devexit_p(hamachi_remove_one),
1996 static int __init hamachi_init (void)
1998 /* when a module, this is printed whether or not devices are found in probe */
2002 if (pci_register_driver(&hamachi_driver) > 0)
2004 pci_unregister_driver(&hamachi_driver);
2008 static void __exit hamachi_exit (void)
2010 pci_unregister_driver(&hamachi_driver);
2014 module_init(hamachi_init);
2015 module_exit(hamachi_exit);