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
23 [link no longer provides useful info -jgarzik]
25 http://www.parl.clemson.edu/~keithu/hamachi.html
29 #define DRV_NAME "hamachi"
30 #define DRV_VERSION "2.1"
31 #define DRV_RELDATE "Sept 11, 2006"
34 /* A few user-configurable values. */
36 static int debug
= 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
38 #define hamachi_debug debug
39 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
40 static int max_interrupt_work
= 40;
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
46 static int max_rx_latency
= 0x11;
47 static int max_rx_gap
= 0x05;
48 static int min_rx_pkt
= 0x18;
49 static int max_tx_latency
= 0x00;
50 static int max_tx_gap
= 0x00;
51 static int min_tx_pkt
= 0x30;
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
57 static int rx_copybreak
;
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.
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
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.
79 0x00000080 : Force half-duplex
80 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
85 #define MAX_UNITS 8 /* More are supported, limit only on options */
86 static int options
[MAX_UNITS
] = {-1, -1, -1, -1, -1, -1, -1, -1};
87 static 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
90 * the TxIntControl and RxIntControl registers.
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
99 * 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
103 static int rx_params
[MAX_UNITS
] = {-1, -1, -1, -1, -1, -1, -1, -1};
104 static int tx_params
[MAX_UNITS
] = {-1, -1, -1, -1, -1, -1, -1, -1};
106 /* Operational parameters that are set at compile time. */
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
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)
125 * Enable netdev_ioctl. Added interrupt coalescing parameter adjustment.
126 * 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov>
129 /* play with 64-bit addrlen; seems to be a teensy bit slower --pw */
130 /* #define ADDRLEN 64 */
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>
144 /* Operational parameters that usually are not changed. */
145 /* Time in jiffies before concluding the transmitter is hung. */
146 #define TX_TIMEOUT (5*HZ)
148 #include <linux/module.h>
149 #include <linux/kernel.h>
150 #include <linux/string.h>
151 #include <linux/timer.h>
152 #include <linux/time.h>
153 #include <linux/errno.h>
154 #include <linux/ioport.h>
155 #include <linux/slab.h>
156 #include <linux/interrupt.h>
157 #include <linux/pci.h>
158 #include <linux/init.h>
159 #include <linux/ethtool.h>
160 #include <linux/mii.h>
161 #include <linux/netdevice.h>
162 #include <linux/etherdevice.h>
163 #include <linux/skbuff.h>
164 #include <linux/ip.h>
165 #include <linux/delay.h>
166 #include <linux/bitops.h>
168 #include <asm/uaccess.h>
169 #include <asm/processor.h> /* Processor type for cache alignment. */
171 #include <asm/unaligned.h>
172 #include <asm/cache.h>
174 static const char version
[] __devinitconst
=
175 KERN_INFO DRV_NAME
".c:v" DRV_VERSION
" " DRV_RELDATE
" Written by Donald Becker\n"
176 " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
177 " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
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.
186 #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
189 /* Define IP_OFFSET to be IPOPT_OFFSET */
192 #define IP_OFFSET IPOPT_OFFSET
198 #define RUN_AT(x) (jiffies + (x))
204 /* Condensed bus+endian portability operations. */
206 #define cpu_to_leXX(addr) cpu_to_le64(addr)
207 #define leXX_to_cpu(addr) le64_to_cpu(addr)
209 #define cpu_to_leXX(addr) cpu_to_le32(addr)
210 #define leXX_to_cpu(addr) le32_to_cpu(addr)
217 I. Board Compatibility
219 This device driver is designed for the Packet Engines "Hamachi"
220 Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
223 II. Board-specific settings
225 No jumpers exist on the board. The chip supports software correction of
226 various motherboard wiring errors, however this driver does not support
229 III. Driver operation
233 The Hamachi uses a typical descriptor based bus-master architecture.
234 The descriptor list is similar to that used by the Digital Tulip.
235 This driver uses two statically allocated fixed-size descriptor lists
236 formed into rings by a branch from the final descriptor to the beginning of
237 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
239 This driver uses a zero-copy receive and transmit scheme similar my other
241 The driver allocates full frame size skbuffs for the Rx ring buffers at
242 open() time and passes the skb->data field to the Hamachi as receive data
243 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
244 a fresh skbuff is allocated and the frame is copied to the new skbuff.
245 When the incoming frame is larger, the skbuff is passed directly up the
246 protocol stack and replaced by a newly allocated skbuff.
248 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
249 using a full-sized skbuff for small frames vs. the copying costs of larger
250 frames. Gigabit cards are typically used on generously configured machines
251 and the underfilled buffers have negligible impact compared to the benefit of
252 a single allocation size, so the default value of zero results in never
255 IIIb/c. Transmit/Receive Structure
257 The Rx and Tx descriptor structure are straight-forward, with no historical
258 baggage that must be explained. Unlike the awkward DBDMA structure, there
259 are no unused fields or option bits that had only one allowable setting.
261 Two details should be noted about the descriptors: The chip supports both 32
262 bit and 64 bit address structures, and the length field is overwritten on
263 the receive descriptors. The descriptor length is set in the control word
264 for each channel. The development driver uses 32 bit addresses only, however
265 64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
267 IIId. Synchronization
269 This driver is very similar to my other network drivers.
270 The driver runs as two independent, single-threaded flows of control. One
271 is the send-packet routine, which enforces single-threaded use by the
272 dev->tbusy flag. The other thread is the interrupt handler, which is single
273 threaded by the hardware and other software.
275 The send packet thread has partial control over the Tx ring and 'dev->tbusy'
276 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
277 queue slot is empty, it clears the tbusy flag when finished otherwise it sets
278 the 'hmp->tx_full' flag.
280 The interrupt handler has exclusive control over the Rx ring and records stats
281 from the Tx ring. After reaping the stats, it marks the Tx queue entry as
282 empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
283 clears both the tx_full and tbusy flags.
287 Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
291 Hamachi Engineering Design Specification, 5/15/97
292 (Note: This version was marked "Confidential".)
300 01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
301 to help avoid some stall conditions -- this needs further research.
303 01/15/1999 EPK Creation of the hamachi_tx function. This function cleans
304 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
307 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
310 to set the entire flag to zero after processing.
312 01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
313 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.
318 01/15/1999 EPK Some adjustments were made to the chip initialization.
319 End-to-end flow control should now be fully active and the interrupt
320 algorithm vars have been changed. These could probably use further tuning.
322 01/15/1999 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.
327 01/15/1999 EPK In general, the overall bandwidth has increased and
328 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.
333 01/18/1999 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
339 slot isn't in use -- hypothetically, the card might be searching the
340 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.
345 02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
346 problem (TxCmd and RxCmd need only to be set when idle or stopped.
348 02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
349 (Michel Mueller pointed out the ``permanently busy'' potential
352 02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
354 02/23/1999 EPK Verified that the interrupt status field bits for Tx were
355 incorrectly defined and corrected (as per Michel Mueller).
357 02/23/1999 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).
361 03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
363 12/31/1999 KDU Cleaned up assorted things and added Don's code to force
366 02/20/2000 KDU Some of the control was just plain odd. Cleaned up the
367 hamachi_start_xmit() and hamachi_interrupt() code. There is still some
368 re-structuring I would like to do.
370 03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
371 parameters on a dual P3-450 setup yielded the new default interrupt
372 mitigation parameters. Tx should interrupt VERY infrequently due to
373 Eric's scheme. Rx should be more often...
375 03/13/2000 KDU Added a patch to make the Rx Checksum code interact
376 nicely with non-linux machines.
378 03/13/2000 KDU Experimented with some of the configuration values:
380 -It seems that enabling PCI performance commands for descriptors
381 (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
383 leave them that way until I hear further feedback.
385 -Increasing the PCI_LATENCY_TIMER to 130
386 (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
387 degrade performance. Leaving default at 64 pending further information.
389 03/14/2000 KDU Further tuning:
391 -adjusted boguscnt in hamachi_rx() to depend on interrupt
392 mitigation parameters chosen.
394 -Selected a set of interrupt parameters based on some extensive testing.
395 These may change with more testing.
399 -Consider borrowing from the acenic driver code to check PCI_COMMAND for
400 PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
403 -fix the reset procedure. It doesn't quite work.
406 /* A few values that may be tweaked. */
407 /* Size of each temporary Rx buffer, calculated as:
408 * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
409 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
410 * 2 more because we use skb_reserve.
412 #define PKT_BUF_SZ 1538
414 /* For now, this is going to be set to the maximum size of an ethernet
415 * packet. Eventually, we may want to make it a variable that is
418 #define MAX_FRAME_SIZE 1518
420 /* The rest of these values should never change. */
422 static void hamachi_timer(unsigned long data
);
424 enum capability_flags
{CanHaveMII
=1, };
425 static const struct chip_info
{
426 u16 vendor_id
, device_id
, device_id_mask
, pad
;
428 void (*media_timer
)(unsigned long data
);
431 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer
, 0},
435 /* Offsets to the Hamachi registers. Various sizes. */
436 enum hamachi_offsets
{
437 TxDMACtrl
=0x00, TxCmd
=0x04, TxStatus
=0x06, TxPtr
=0x08, TxCurPtr
=0x10,
438 RxDMACtrl
=0x20, RxCmd
=0x24, RxStatus
=0x26, RxPtr
=0x28, RxCurPtr
=0x30,
439 PCIClkMeas
=0x060, MiscStatus
=0x066, ChipRev
=0x68, ChipReset
=0x06B,
440 LEDCtrl
=0x06C, VirtualJumpers
=0x06D, GPIO
=0x6E,
441 TxChecksum
=0x074, RxChecksum
=0x076,
442 TxIntrCtrl
=0x078, RxIntrCtrl
=0x07C,
443 InterruptEnable
=0x080, InterruptClear
=0x084, IntrStatus
=0x088,
445 MACCnfg
=0x0A0, FrameGap0
=0x0A2, FrameGap1
=0x0A4,
446 /* See enum MII_offsets below. */
447 MACCnfg2
=0x0B0, RxDepth
=0x0B8, FlowCtrl
=0x0BC, MaxFrameSize
=0x0CE,
448 AddrMode
=0x0D0, StationAddr
=0x0D2,
449 /* Gigabit AutoNegotiation. */
450 ANCtrl
=0x0E0, ANStatus
=0x0E2, ANXchngCtrl
=0x0E4, ANAdvertise
=0x0E8,
451 ANLinkPartnerAbility
=0x0EA,
452 EECmdStatus
=0x0F0, EEData
=0x0F1, EEAddr
=0x0F2,
456 /* Offsets to the MII-mode registers. */
458 MII_Cmd
=0xA6, MII_Addr
=0xA8, MII_Wr_Data
=0xAA, MII_Rd_Data
=0xAC,
462 /* Bits in the interrupt status/mask registers. */
463 enum intr_status_bits
{
464 IntrRxDone
=0x01, IntrRxPCIFault
=0x02, IntrRxPCIErr
=0x04,
465 IntrTxDone
=0x100, IntrTxPCIFault
=0x200, IntrTxPCIErr
=0x400,
466 LinkChange
=0x10000, NegotiationChange
=0x20000, StatsMax
=0x40000, };
468 /* The Hamachi Rx and Tx buffer descriptors. */
469 struct hamachi_desc
{
470 __le32 status_n_length
;
479 /* Bits in hamachi_desc.status_n_length */
480 enum desc_status_bits
{
481 DescOwn
=0x80000000, DescEndPacket
=0x40000000, DescEndRing
=0x20000000,
485 #define PRIV_ALIGN 15 /* Required alignment mask */
487 struct hamachi_private
{
488 /* Descriptor rings first for alignment. Tx requires a second descriptor
490 struct hamachi_desc
*rx_ring
;
491 struct hamachi_desc
*tx_ring
;
492 struct sk_buff
* rx_skbuff
[RX_RING_SIZE
];
493 struct sk_buff
* tx_skbuff
[TX_RING_SIZE
];
494 dma_addr_t tx_ring_dma
;
495 dma_addr_t rx_ring_dma
;
496 struct net_device_stats stats
;
497 struct timer_list timer
; /* Media selection timer. */
498 /* Frequently used and paired value: keep adjacent for cache effect. */
501 unsigned int cur_rx
, dirty_rx
; /* Producer/consumer ring indices */
502 unsigned int cur_tx
, dirty_tx
;
503 unsigned int rx_buf_sz
; /* Based on MTU+slack. */
504 unsigned int tx_full
:1; /* The Tx queue is full. */
505 unsigned int duplex_lock
:1;
506 unsigned int default_port
:4; /* Last dev->if_port value. */
507 /* MII transceiver section. */
508 int mii_cnt
; /* MII device addresses. */
509 struct mii_if_info mii_if
; /* MII lib hooks/info */
510 unsigned char phys
[MII_CNT
]; /* MII device addresses, only first one used. */
511 u32 rx_int_var
, tx_int_var
; /* interrupt control variables */
512 u32 option
; /* Hold on to a copy of the options */
513 struct pci_dev
*pci_dev
;
517 MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
518 MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
519 MODULE_LICENSE("GPL");
521 module_param(max_interrupt_work
, int, 0);
522 module_param(mtu
, int, 0);
523 module_param(debug
, int, 0);
524 module_param(min_rx_pkt
, int, 0);
525 module_param(max_rx_gap
, int, 0);
526 module_param(max_rx_latency
, int, 0);
527 module_param(min_tx_pkt
, int, 0);
528 module_param(max_tx_gap
, int, 0);
529 module_param(max_tx_latency
, int, 0);
530 module_param(rx_copybreak
, int, 0);
531 module_param_array(rx_params
, int, NULL
, 0);
532 module_param_array(tx_params
, int, NULL
, 0);
533 module_param_array(options
, int, NULL
, 0);
534 module_param_array(full_duplex
, int, NULL
, 0);
535 module_param(force32
, int, 0);
536 MODULE_PARM_DESC(max_interrupt_work
, "GNIC-II maximum events handled per interrupt");
537 MODULE_PARM_DESC(mtu
, "GNIC-II MTU (all boards)");
538 MODULE_PARM_DESC(debug
, "GNIC-II debug level (0-7)");
539 MODULE_PARM_DESC(min_rx_pkt
, "GNIC-II minimum Rx packets processed between interrupts");
540 MODULE_PARM_DESC(max_rx_gap
, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
541 MODULE_PARM_DESC(max_rx_latency
, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
542 MODULE_PARM_DESC(min_tx_pkt
, "GNIC-II minimum Tx packets processed between interrupts");
543 MODULE_PARM_DESC(max_tx_gap
, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
544 MODULE_PARM_DESC(max_tx_latency
, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
545 MODULE_PARM_DESC(rx_copybreak
, "GNIC-II copy breakpoint for copy-only-tiny-frames");
546 MODULE_PARM_DESC(rx_params
, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
547 MODULE_PARM_DESC(tx_params
, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
548 MODULE_PARM_DESC(options
, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
549 MODULE_PARM_DESC(full_duplex
, "GNIC-II full duplex setting(s) (1)");
550 MODULE_PARM_DESC(force32
, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)");
552 static int read_eeprom(void __iomem
*ioaddr
, int location
);
553 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
);
554 static void mdio_write(struct net_device
*dev
, int phy_id
, int location
, int value
);
555 static int hamachi_open(struct net_device
*dev
);
556 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
557 static void hamachi_timer(unsigned long data
);
558 static void hamachi_tx_timeout(struct net_device
*dev
);
559 static void hamachi_init_ring(struct net_device
*dev
);
560 static int hamachi_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
561 static irqreturn_t
hamachi_interrupt(int irq
, void *dev_instance
);
562 static int hamachi_rx(struct net_device
*dev
);
563 static inline int hamachi_tx(struct net_device
*dev
);
564 static void hamachi_error(struct net_device
*dev
, int intr_status
);
565 static int hamachi_close(struct net_device
*dev
);
566 static struct net_device_stats
*hamachi_get_stats(struct net_device
*dev
);
567 static void set_rx_mode(struct net_device
*dev
);
568 static const struct ethtool_ops ethtool_ops
;
569 static const struct ethtool_ops ethtool_ops_no_mii
;
571 static 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
,
579 .ndo_set_mac_address
= eth_mac_addr
,
580 .ndo_tx_timeout
= hamachi_tx_timeout
,
581 .ndo_do_ioctl
= netdev_ioctl
,
585 static int __devinit
hamachi_init_one (struct pci_dev
*pdev
,
586 const struct pci_device_id
*ent
)
588 struct hamachi_private
*hmp
;
589 int option
, i
, rx_int_var
, tx_int_var
, boguscnt
;
590 int chip_id
= ent
->driver_data
;
592 void __iomem
*ioaddr
;
595 struct net_device
*dev
;
600 /* when built into the kernel, we only print version if device is found */
602 static int printed_version
;
603 if (!printed_version
++)
607 if (pci_enable_device(pdev
)) {
612 base
= pci_resource_start(pdev
, 0);
613 #ifdef __alpha__ /* Really "64 bit addrs" */
614 base
|= (pci_resource_start(pdev
, 1) << 32);
617 pci_set_master(pdev
);
619 i
= pci_request_regions(pdev
, DRV_NAME
);
624 ioaddr
= ioremap(base
, 0x400);
626 goto err_out_release
;
628 dev
= alloc_etherdev(sizeof(struct hamachi_private
));
630 goto err_out_iounmap
;
632 SET_NETDEV_DEV(dev
, &pdev
->dev
);
635 printk("check that skbcopy in ip_queue_xmit isn't happening\n");
636 dev
->hard_header_len
+= 8; /* for cksum tag */
639 for (i
= 0; i
< 6; i
++)
640 dev
->dev_addr
[i
] = 1 ? read_eeprom(ioaddr
, 4 + i
)
641 : readb(ioaddr
+ StationAddr
+ i
);
643 #if ! defined(final_version)
644 if (hamachi_debug
> 4)
645 for (i
= 0; i
< 0x10; i
++)
647 read_eeprom(ioaddr
, i
), i
% 16 != 15 ? " " : "\n");
650 hmp
= netdev_priv(dev
);
651 spin_lock_init(&hmp
->lock
);
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;
659 ring_space
= pci_alloc_consistent(pdev
, TX_TOTAL_SIZE
, &ring_dma
);
661 goto err_out_cleardev
;
662 hmp
->tx_ring
= (struct hamachi_desc
*)ring_space
;
663 hmp
->tx_ring_dma
= ring_dma
;
665 ring_space
= pci_alloc_consistent(pdev
, RX_TOTAL_SIZE
, &ring_dma
);
667 goto err_out_unmap_tx
;
668 hmp
->rx_ring
= (struct hamachi_desc
*)ring_space
;
669 hmp
->rx_ring_dma
= ring_dma
;
671 /* Check for options being passed in */
672 option
= card_idx
< MAX_UNITS
? options
[card_idx
] : 0;
674 option
= dev
->mem_start
;
676 /* If the bus size is misidentified, do the following. */
677 force32
= force32
? force32
:
678 ((option
>= 0) ? ((option
& 0x00000070) >> 4) : 0 );
680 writeb(force32
, ioaddr
+ VirtualJumpers
);
682 /* Hmmm, do we really need to reset the chip???. */
683 writeb(0x01, ioaddr
+ ChipReset
);
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.
690 i
= readb(ioaddr
+ PCIClkMeas
);
691 for (boguscnt
= 0; (!(i
& 0x080)) && boguscnt
< 1000; boguscnt
++){
693 i
= readb(ioaddr
+ PCIClkMeas
);
697 dev
->base_addr
= (unsigned long)ioaddr
;
699 pci_set_drvdata(pdev
, dev
);
701 hmp
->chip_id
= chip_id
;
704 /* The lower four bits are the media type. */
706 hmp
->option
= option
;
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;
715 if (card_idx
< MAX_UNITS
&& full_duplex
[card_idx
] > 0)
716 hmp
->mii_if
.full_duplex
= 1;
718 /* lock the duplex mode if someone specified a value */
719 if (hmp
->mii_if
.full_duplex
|| (option
& 0x080))
720 hmp
->duplex_lock
= 1;
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;
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;
732 hmp
->rx_int_var
= rx_int_var
>= 0 ? rx_int_var
:
733 (min_rx_pkt
<< 16 | max_rx_gap
<< 8 | max_rx_latency
);
734 hmp
->tx_int_var
= tx_int_var
>= 0 ? tx_int_var
:
735 (min_tx_pkt
<< 16 | max_tx_gap
<< 8 | max_tx_latency
);
738 /* The Hamachi-specific entries in the device structure. */
739 dev
->netdev_ops
= &hamachi_netdev_ops
;
740 if (chip_tbl
[hmp
->chip_id
].flags
& CanHaveMII
)
741 SET_ETHTOOL_OPS(dev
, ðtool_ops
);
743 SET_ETHTOOL_OPS(dev
, ðtool_ops_no_mii
);
744 dev
->watchdog_timeo
= TX_TIMEOUT
;
748 i
= register_netdev(dev
);
751 goto err_out_unmap_rx
;
754 printk(KERN_INFO
"%s: %s type %x at %p, %pM, IRQ %d.\n",
755 dev
->name
, chip_tbl
[chip_id
].name
, readl(ioaddr
+ ChipRev
),
756 ioaddr
, dev
->dev_addr
, irq
);
757 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
));
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
);
777 hmp
->mii_cnt
= phy_idx
;
778 if (hmp
->mii_cnt
> 0)
779 hmp
->mii_if
.phy_id
= hmp
->phys
[0];
781 memset(&hmp
->mii_if
, 0, sizeof(hmp
->mii_if
));
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 */
792 pci_free_consistent(pdev
, RX_TOTAL_SIZE
, hmp
->rx_ring
,
795 pci_free_consistent(pdev
, TX_TOTAL_SIZE
, hmp
->tx_ring
,
802 pci_release_regions(pdev
);
807 static int __devinit
read_eeprom(void __iomem
*ioaddr
, int location
)
809 int bogus_cnt
= 1000;
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
);
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
);
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. */
827 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
)
829 struct hamachi_private
*hmp
= netdev_priv(dev
);
830 void __iomem
*ioaddr
= hmp
->base
;
833 /* We should check busy first - per docs -KDU */
834 for (i
= 10000; i
>= 0; i
--)
835 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
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)
842 return readw(ioaddr
+ MII_Rd_Data
);
845 static void mdio_write(struct net_device
*dev
, int phy_id
, int location
, int value
)
847 struct hamachi_private
*hmp
= netdev_priv(dev
);
848 void __iomem
*ioaddr
= hmp
->base
;
851 /* We should check busy first - per docs -KDU */
852 for (i
= 10000; i
>= 0; i
--)
853 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
855 writew((phy_id
<<8) + location
, ioaddr
+ MII_Addr
);
856 writew(value
, ioaddr
+ MII_Wr_Data
);
858 /* Wait for the command to finish. */
859 for (i
= 10000; i
>= 0; i
--)
860 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
866 static int hamachi_open(struct net_device
*dev
)
868 struct hamachi_private
*hmp
= netdev_priv(dev
);
869 void __iomem
*ioaddr
= hmp
->base
;
871 u32 rx_int_var
, tx_int_var
;
874 i
= request_irq(dev
->irq
, &hamachi_interrupt
, IRQF_SHARED
, dev
->name
, dev
);
878 if (hamachi_debug
> 1)
879 printk(KERN_DEBUG
"%s: hamachi_open() irq %d.\n",
880 dev
->name
, dev
->irq
);
882 hamachi_init_ring(dev
);
885 /* writellll anyone ? */
886 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);
891 writel(hmp
->rx_ring_dma
, ioaddr
+ RxPtr
);
892 writel(hmp
->tx_ring_dma
, ioaddr
+ TxPtr
);
895 /* TODO: It would make sense to organize this as words since the card
896 * documentation does. -KDU
898 for (i
= 0; i
< 6; i
++)
899 writeb(dev
->dev_addr
[i
], ioaddr
+ StationAddr
+ i
);
901 /* Initialize other registers: with so many this eventually this will
902 converted to an offset/value list. */
904 /* Configure the FIFO */
905 fifo_info
= (readw(ioaddr
+ GPIO
) & 0x00C0) >> 6;
909 writew(0x0000, ioaddr
+ FIFOcfg
);
912 /* Configure the FIFO for 512K external, 16K used for Tx. */
913 writew(0x0028, ioaddr
+ FIFOcfg
);
916 /* Configure the FIFO for 1024 external, 32K used for Tx. */
917 writew(0x004C, ioaddr
+ FIFOcfg
);
920 /* Configure the FIFO for 2048 external, 32K used for Tx. */
921 writew(0x006C, ioaddr
+ FIFOcfg
);
924 printk(KERN_WARNING
"%s: Unsupported external memory config!\n",
926 /* Default to no FIFO */
927 writew(0x0000, ioaddr
+ FIFOcfg
);
931 if (dev
->if_port
== 0)
932 dev
->if_port
= hmp
->default_port
;
935 /* Setting the Rx mode will start the Rx process. */
936 /* If someone didn't choose a duplex, default to full-duplex */
937 if (hmp
->duplex_lock
!= 1)
938 hmp
->mii_if
.full_duplex
= 1;
940 /* always 1, takes no more time to do it */
941 writew(0x0001, ioaddr
+ RxChecksum
);
943 writew(0x0001, ioaddr
+ TxChecksum
);
945 writew(0x0000, ioaddr
+ TxChecksum
);
947 writew(0x8000, ioaddr
+ MACCnfg
); /* Soft reset the MAC */
948 writew(0x215F, ioaddr
+ MACCnfg
);
949 writew(0x000C, ioaddr
+ FrameGap0
);
950 /* 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 ??? */
958 /* Enable legacy links. */
959 writew(0x0400, ioaddr
+ ANXchngCtrl
); /* Enable legacy links. */
960 /* Initial Link LED to blinking red. */
961 writeb(0x03, ioaddr
+ LEDCtrl
);
963 /* Configure interrupt mitigation. This has a great effect on
964 performance, so systems tuning should start here!. */
966 rx_int_var
= hmp
->rx_int_var
;
967 tx_int_var
= hmp
->tx_int_var
;
969 if (hamachi_debug
> 1) {
970 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
971 tx_int_var
& 0x00ff, (tx_int_var
& 0x00ff00) >> 8,
972 (tx_int_var
& 0x00ff0000) >> 16);
973 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
974 rx_int_var
& 0x00ff, (rx_int_var
& 0x00ff00) >> 8,
975 (rx_int_var
& 0x00ff0000) >> 16);
976 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var
, tx_int_var
);
979 writel(tx_int_var
, ioaddr
+ TxIntrCtrl
);
980 writel(rx_int_var
, ioaddr
+ RxIntrCtrl
);
984 netif_start_queue(dev
);
986 /* Enable interrupts by setting the interrupt mask. */
987 writel(0x80878787, ioaddr
+ InterruptEnable
);
988 writew(0x0000, ioaddr
+ EventStatus
); /* Clear non-interrupting events */
990 /* Configure and start the DMA channels. */
991 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
993 writew(0x005D, ioaddr
+ RxDMACtrl
); /* 128 dword bursts */
994 writew(0x005D, ioaddr
+ TxDMACtrl
);
996 writew(0x001D, ioaddr
+ RxDMACtrl
);
997 writew(0x001D, ioaddr
+ TxDMACtrl
);
999 writew(0x0001, ioaddr
+ RxCmd
);
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
));
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
);
1015 static inline int hamachi_tx(struct net_device
*dev
)
1017 struct hamachi_private
*hmp
= netdev_priv(dev
);
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
;
1025 if (hmp
->tx_ring
[entry
].status_n_length
& cpu_to_le32(DescOwn
))
1027 /* Free the original skb. */
1028 skb
= hmp
->tx_skbuff
[entry
];
1030 pci_unmap_single(hmp
->pci_dev
,
1031 leXX_to_cpu(hmp
->tx_ring
[entry
].addr
),
1032 skb
->len
, PCI_DMA_TODEVICE
);
1034 hmp
->tx_skbuff
[entry
] = NULL
;
1036 hmp
->tx_ring
[entry
].status_n_length
= 0;
1037 if (entry
>= TX_RING_SIZE
-1)
1038 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|=
1039 cpu_to_le32(DescEndRing
);
1040 hmp
->stats
.tx_packets
++;
1046 static void hamachi_timer(unsigned long data
)
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
;
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));
1066 /* We could do something here... nah. */
1067 hmp
->timer
.expires
= RUN_AT(next_tick
);
1068 add_timer(&hmp
->timer
);
1071 static void hamachi_tx_timeout(struct net_device
*dev
)
1074 struct hamachi_private
*hmp
= netdev_priv(dev
);
1075 void __iomem
*ioaddr
= hmp
->base
;
1077 printk(KERN_WARNING
"%s: Hamachi transmit timed out, status %8.8x,"
1078 " resetting...\n", dev
->name
, (int)readw(ioaddr
+ TxStatus
));
1081 printk(KERN_DEBUG
" Rx ring %p: ", hmp
->rx_ring
);
1082 for (i
= 0; i
< RX_RING_SIZE
; i
++)
1083 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
);
1087 for (i
= 0; i
< TX_RING_SIZE
; i
++)
1088 printk(KERN_CONT
" %4.4x",
1089 le32_to_cpu(hmp
->tx_ring
[i
].status_n_length
));
1090 printk(KERN_CONT
"\n");
1093 /* Reinit the hardware and make sure the Rx and Tx processes
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
1104 for (i
= 0; i
< RX_RING_SIZE
; i
++)
1105 hmp
->rx_ring
[i
].status_n_length
&= cpu_to_le32(~DescOwn
);
1107 /* Presume that all packets in the Tx queue are gone if we have to
1108 * re-init the hardware.
1110 for (i
= 0; i
< TX_RING_SIZE
; i
++){
1111 struct sk_buff
*skb
;
1113 if (i
>= TX_RING_SIZE
- 1)
1114 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));
1119 hmp
->tx_ring
[i
].status_n_length
&= cpu_to_le32(0x0000ffff);
1120 skb
= hmp
->tx_skbuff
[i
];
1122 pci_unmap_single(hmp
->pci_dev
, leXX_to_cpu(hmp
->tx_ring
[i
].addr
),
1123 skb
->len
, PCI_DMA_TODEVICE
);
1125 hmp
->tx_skbuff
[i
] = NULL
;
1129 udelay(60); /* Sleep 60 us just for safety sake */
1130 writew(0x0002, ioaddr
+ RxCmd
); /* STOP Rx */
1132 writeb(0x01, ioaddr
+ ChipReset
); /* Reinit the hardware */
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
1140 for (i
= 0; i
< RX_RING_SIZE
; i
++){
1141 struct sk_buff
*skb
= hmp
->rx_skbuff
[i
];
1144 pci_unmap_single(hmp
->pci_dev
,
1145 leXX_to_cpu(hmp
->rx_ring
[i
].addr
),
1146 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1148 hmp
->rx_skbuff
[i
] = NULL
;
1151 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1152 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1153 struct sk_buff
*skb
= netdev_alloc_skb(dev
, hmp
->rx_buf_sz
);
1154 hmp
->rx_skbuff
[i
] = skb
;
1158 skb_reserve(skb
, 2); /* 16 byte align the IP header. */
1159 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1160 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1161 hmp
->rx_ring
[i
].status_n_length
= cpu_to_le32(DescOwn
|
1162 DescEndPacket
| DescIntr
| (hmp
->rx_buf_sz
- 2));
1164 hmp
->dirty_rx
= (unsigned int)(i
- RX_RING_SIZE
);
1165 /* Mark the last entry as wrapping the ring. */
1166 hmp
->rx_ring
[RX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1168 /* Trigger an immediate transmit demand. */
1169 dev
->trans_start
= jiffies
; /* prevent tx timeout */
1170 hmp
->stats
.tx_errors
++;
1172 /* Restart the chip's Tx/Rx processes . */
1173 writew(0x0002, ioaddr
+ TxCmd
); /* STOP Tx */
1174 writew(0x0001, ioaddr
+ TxCmd
); /* START Tx */
1175 writew(0x0001, ioaddr
+ RxCmd
); /* START Rx */
1177 netif_wake_queue(dev
);
1181 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1182 static void hamachi_init_ring(struct net_device
*dev
)
1184 struct hamachi_private
*hmp
= netdev_priv(dev
);
1188 hmp
->cur_rx
= hmp
->cur_tx
= 0;
1189 hmp
->dirty_rx
= hmp
->dirty_tx
= 0;
1191 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1192 * card needs room to do 8 byte alignment, +2 so we can reserve
1193 * the first 2 bytes, and +16 gets room for the status word from the
1196 hmp
->rx_buf_sz
= (dev
->mtu
<= 1492 ? PKT_BUF_SZ
:
1197 (((dev
->mtu
+26+7) & ~7) + 2 + 16));
1199 /* Initialize all Rx descriptors. */
1200 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1201 hmp
->rx_ring
[i
].status_n_length
= 0;
1202 hmp
->rx_skbuff
[i
] = NULL
;
1204 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1205 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1206 struct sk_buff
*skb
= dev_alloc_skb(hmp
->rx_buf_sz
);
1207 hmp
->rx_skbuff
[i
] = skb
;
1210 skb
->dev
= dev
; /* Mark as being used by this device. */
1211 skb_reserve(skb
, 2); /* 16 byte align the IP header. */
1212 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1213 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1214 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
1215 hmp
->rx_ring
[i
].status_n_length
= cpu_to_le32(DescOwn
|
1216 DescEndPacket
| DescIntr
| (hmp
->rx_buf_sz
-2));
1218 hmp
->dirty_rx
= (unsigned int)(i
- RX_RING_SIZE
);
1219 hmp
->rx_ring
[RX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1221 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
1222 hmp
->tx_skbuff
[i
] = NULL
;
1223 hmp
->tx_ring
[i
].status_n_length
= 0;
1225 /* Mark the last entry of the ring */
1226 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1233 #define csum_add(it, val) \
1235 it += (u16) (val); \
1236 if (it & 0xffff0000) { \
1241 /* printk("add %04x --> %04x\n", val, it); \ */
1243 /* uh->len already network format, do not swap */
1244 #define pseudo_csum_udp(sum,ih,uh) do { \
1246 csum_add(sum, (ih)->saddr >> 16); \
1247 csum_add(sum, (ih)->saddr & 0xffff); \
1248 csum_add(sum, (ih)->daddr >> 16); \
1249 csum_add(sum, (ih)->daddr & 0xffff); \
1250 csum_add(sum, cpu_to_be16(IPPROTO_UDP)); \
1251 csum_add(sum, (uh)->len); \
1255 #define pseudo_csum_tcp(sum,ih,len) do { \
1257 csum_add(sum, (ih)->saddr >> 16); \
1258 csum_add(sum, (ih)->saddr & 0xffff); \
1259 csum_add(sum, (ih)->daddr >> 16); \
1260 csum_add(sum, (ih)->daddr & 0xffff); \
1261 csum_add(sum, cpu_to_be16(IPPROTO_TCP)); \
1262 csum_add(sum, htons(len)); \
1266 static int hamachi_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1268 struct hamachi_private
*hmp
= netdev_priv(dev
);
1272 /* Ok, now make sure that the queue has space before trying to
1273 add another skbuff. if we return non-zero the scheduler
1274 should interpret this as a queue full and requeue the buffer
1278 /* We should NEVER reach this point -KDU */
1279 printk(KERN_WARNING
"%s: Hamachi transmit queue full at slot %d.\n",dev
->name
, hmp
->cur_tx
);
1281 /* Wake the potentially-idle transmit channel. */
1282 /* If we don't need to read status, DON'T -KDU */
1283 status
=readw(hmp
->base
+ TxStatus
);
1284 if( !(status
& 0x0001) || (status
& 0x0002))
1285 writew(0x0001, hmp
->base
+ TxCmd
);
1286 return NETDEV_TX_BUSY
;
1289 /* Caution: the write order is important here, set the field
1290 with the "ownership" bits last. */
1292 /* Calculate the next Tx descriptor entry. */
1293 entry
= hmp
->cur_tx
% TX_RING_SIZE
;
1295 hmp
->tx_skbuff
[entry
] = skb
;
1299 /* tack on checksum tag */
1301 struct ethhdr
*eh
= (struct ethhdr
*)skb
->data
;
1302 if (eh
->h_proto
== cpu_to_be16(ETH_P_IP
)) {
1303 struct iphdr
*ih
= (struct iphdr
*)((char *)eh
+ ETH_HLEN
);
1304 if (ih
->protocol
== IPPROTO_UDP
) {
1306 = (struct udphdr
*)((char *)ih
+ ih
->ihl
*4);
1307 u32 offset
= ((unsigned char *)uh
+ 6) - skb
->data
;
1309 pseudo_csum_udp(pseudo
, ih
, uh
);
1310 pseudo
= htons(pseudo
);
1311 printk("udp cksum was %04x, sending pseudo %04x\n",
1313 uh
->check
= 0; /* zero out uh->check before card calc */
1315 * start at 14 (skip ethhdr), store at offset (uh->check),
1316 * use pseudo value given.
1318 tagval
= (14 << 24) | (offset
<< 16) | pseudo
;
1319 } else if (ih
->protocol
== IPPROTO_TCP
) {
1320 printk("tcp, no auto cksum\n");
1323 *(u32
*)skb_push(skb
, 8) = tagval
;
1327 hmp
->tx_ring
[entry
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1328 skb
->data
, skb
->len
, PCI_DMA_TODEVICE
));
1330 /* Hmmmm, could probably put a DescIntr on these, but the way
1331 the driver is currently coded makes Tx interrupts unnecessary
1332 since the clearing of the Tx ring is handled by the start_xmit
1333 routine. This organization helps mitigate the interrupts a
1334 bit and probably renders the max_tx_latency param useless.
1336 Update: Putting a DescIntr bit on all of the descriptors and
1337 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1339 if (entry
>= TX_RING_SIZE
-1) /* Wrap ring */
1340 hmp
->tx_ring
[entry
].status_n_length
= cpu_to_le32(DescOwn
|
1341 DescEndPacket
| DescEndRing
| DescIntr
| skb
->len
);
1343 hmp
->tx_ring
[entry
].status_n_length
= cpu_to_le32(DescOwn
|
1344 DescEndPacket
| DescIntr
| skb
->len
);
1347 /* Non-x86 Todo: explicitly flush cache lines here. */
1349 /* Wake the potentially-idle transmit channel. */
1350 /* If we don't need to read status, DON'T -KDU */
1351 status
=readw(hmp
->base
+ TxStatus
);
1352 if( !(status
& 0x0001) || (status
& 0x0002))
1353 writew(0x0001, hmp
->base
+ TxCmd
);
1355 /* Immediately before returning, let's clear as many entries as we can. */
1358 /* We should kick the bottom half here, since we are not accepting
1359 * interrupts with every packet. i.e. realize that Gigabit ethernet
1360 * can transmit faster than ordinary machines can load packets;
1361 * hence, any packet that got put off because we were in the transmit
1362 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1364 if ((hmp
->cur_tx
- hmp
->dirty_tx
) < (TX_RING_SIZE
- 4))
1365 netif_wake_queue(dev
); /* Typical path */
1368 netif_stop_queue(dev
);
1371 if (hamachi_debug
> 4) {
1372 printk(KERN_DEBUG
"%s: Hamachi transmit frame #%d queued in slot %d.\n",
1373 dev
->name
, hmp
->cur_tx
, entry
);
1375 return NETDEV_TX_OK
;
1378 /* The interrupt handler does all of the Rx thread work and cleans up
1379 after the Tx thread. */
1380 static irqreturn_t
hamachi_interrupt(int irq
, void *dev_instance
)
1382 struct net_device
*dev
= dev_instance
;
1383 struct hamachi_private
*hmp
= netdev_priv(dev
);
1384 void __iomem
*ioaddr
= hmp
->base
;
1385 long boguscnt
= max_interrupt_work
;
1388 #ifndef final_version /* Can never occur. */
1390 printk (KERN_ERR
"hamachi_interrupt(): irq %d for unknown device.\n", irq
);
1395 spin_lock(&hmp
->lock
);
1398 u32 intr_status
= readl(ioaddr
+ InterruptClear
);
1400 if (hamachi_debug
> 4)
1401 printk(KERN_DEBUG
"%s: Hamachi interrupt, status %4.4x.\n",
1402 dev
->name
, intr_status
);
1404 if (intr_status
== 0)
1409 if (intr_status
& IntrRxDone
)
1412 if (intr_status
& IntrTxDone
){
1413 /* This code should RARELY need to execute. After all, this is
1414 * a gigabit link, it should consume packets as fast as we put
1415 * them in AND we clear the Tx ring in hamachi_start_xmit().
1418 for (; hmp
->cur_tx
- hmp
->dirty_tx
> 0; hmp
->dirty_tx
++){
1419 int entry
= hmp
->dirty_tx
% TX_RING_SIZE
;
1420 struct sk_buff
*skb
;
1422 if (hmp
->tx_ring
[entry
].status_n_length
& cpu_to_le32(DescOwn
))
1424 skb
= hmp
->tx_skbuff
[entry
];
1425 /* Free the original skb. */
1427 pci_unmap_single(hmp
->pci_dev
,
1428 leXX_to_cpu(hmp
->tx_ring
[entry
].addr
),
1431 dev_kfree_skb_irq(skb
);
1432 hmp
->tx_skbuff
[entry
] = NULL
;
1434 hmp
->tx_ring
[entry
].status_n_length
= 0;
1435 if (entry
>= TX_RING_SIZE
-1)
1436 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|=
1437 cpu_to_le32(DescEndRing
);
1438 hmp
->stats
.tx_packets
++;
1440 if (hmp
->cur_tx
- hmp
->dirty_tx
< TX_RING_SIZE
- 4){
1441 /* The ring is no longer full */
1443 netif_wake_queue(dev
);
1446 netif_wake_queue(dev
);
1451 /* Abnormal error summary/uncommon events handlers. */
1453 (IntrTxPCIFault
| IntrTxPCIErr
| IntrRxPCIFault
| IntrRxPCIErr
|
1454 LinkChange
| NegotiationChange
| StatsMax
))
1455 hamachi_error(dev
, intr_status
);
1457 if (--boguscnt
< 0) {
1458 printk(KERN_WARNING
"%s: Too much work at interrupt, status=0x%4.4x.\n",
1459 dev
->name
, intr_status
);
1464 if (hamachi_debug
> 3)
1465 printk(KERN_DEBUG
"%s: exiting interrupt, status=%#4.4x.\n",
1466 dev
->name
, readl(ioaddr
+ IntrStatus
));
1468 #ifndef final_version
1469 /* Code that should never be run! Perhaps remove after testing.. */
1471 static int stopit
= 10;
1472 if (dev
->start
== 0 && --stopit
< 0) {
1473 printk(KERN_ERR
"%s: Emergency stop, looping startup interrupt.\n",
1480 spin_unlock(&hmp
->lock
);
1481 return IRQ_RETVAL(handled
);
1484 /* This routine is logically part of the interrupt handler, but separated
1485 for clarity and better register allocation. */
1486 static int hamachi_rx(struct net_device
*dev
)
1488 struct hamachi_private
*hmp
= netdev_priv(dev
);
1489 int entry
= hmp
->cur_rx
% RX_RING_SIZE
;
1490 int boguscnt
= (hmp
->dirty_rx
+ RX_RING_SIZE
) - hmp
->cur_rx
;
1492 if (hamachi_debug
> 4) {
1493 printk(KERN_DEBUG
" In hamachi_rx(), entry %d status %4.4x.\n",
1494 entry
, hmp
->rx_ring
[entry
].status_n_length
);
1497 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1499 struct hamachi_desc
*desc
= &(hmp
->rx_ring
[entry
]);
1500 u32 desc_status
= le32_to_cpu(desc
->status_n_length
);
1501 u16 data_size
= desc_status
; /* Implicit truncate */
1505 if (desc_status
& DescOwn
)
1507 pci_dma_sync_single_for_cpu(hmp
->pci_dev
,
1508 leXX_to_cpu(desc
->addr
),
1510 PCI_DMA_FROMDEVICE
);
1511 buf_addr
= (u8
*) hmp
->rx_skbuff
[entry
]->data
;
1512 frame_status
= get_unaligned_le32(&(buf_addr
[data_size
- 12]));
1513 if (hamachi_debug
> 4)
1514 printk(KERN_DEBUG
" hamachi_rx() status was %8.8x.\n",
1518 if ( ! (desc_status
& DescEndPacket
)) {
1519 printk(KERN_WARNING
"%s: Oversized Ethernet frame spanned "
1520 "multiple buffers, entry %#x length %d status %4.4x!\n",
1521 dev
->name
, hmp
->cur_rx
, data_size
, desc_status
);
1522 printk(KERN_WARNING
"%s: Oversized Ethernet frame %p vs %p.\n",
1523 dev
->name
, desc
, &hmp
->rx_ring
[hmp
->cur_rx
% RX_RING_SIZE
]);
1524 printk(KERN_WARNING
"%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1526 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
+1) % RX_RING_SIZE
].status_n_length
) & 0xffff0000,
1527 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
+1) % RX_RING_SIZE
].status_n_length
) & 0x0000ffff,
1528 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
-1) % RX_RING_SIZE
].status_n_length
));
1529 hmp
->stats
.rx_length_errors
++;
1530 } /* else Omit for prototype errata??? */
1531 if (frame_status
& 0x00380000) {
1532 /* There was an error. */
1533 if (hamachi_debug
> 2)
1534 printk(KERN_DEBUG
" hamachi_rx() Rx error was %8.8x.\n",
1536 hmp
->stats
.rx_errors
++;
1537 if (frame_status
& 0x00600000) hmp
->stats
.rx_length_errors
++;
1538 if (frame_status
& 0x00080000) hmp
->stats
.rx_frame_errors
++;
1539 if (frame_status
& 0x00100000) hmp
->stats
.rx_crc_errors
++;
1540 if (frame_status
< 0) hmp
->stats
.rx_dropped
++;
1542 struct sk_buff
*skb
;
1544 u16 pkt_len
= (frame_status
& 0x07ff) - 4;
1546 u32 pfck
= *(u32
*) &buf_addr
[data_size
- 8];
1550 #ifndef final_version
1551 if (hamachi_debug
> 4)
1552 printk(KERN_DEBUG
" hamachi_rx() normal Rx pkt length %d"
1553 " of %d, bogus_cnt %d.\n",
1554 pkt_len
, data_size
, boguscnt
);
1555 if (hamachi_debug
> 5)
1556 printk(KERN_DEBUG
"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1558 *(s32
*)&(buf_addr
[data_size
- 20]),
1559 *(s32
*)&(buf_addr
[data_size
- 16]),
1560 *(s32
*)&(buf_addr
[data_size
- 12]),
1561 *(s32
*)&(buf_addr
[data_size
- 8]),
1562 *(s32
*)&(buf_addr
[data_size
- 4]));
1564 /* Check if the packet is long enough to accept without copying
1565 to a minimally-sized skbuff. */
1566 if (pkt_len
< rx_copybreak
1567 && (skb
= dev_alloc_skb(pkt_len
+ 2)) != NULL
) {
1569 printk(KERN_ERR
"%s: rx_copybreak non-zero "
1570 "not good with RX_CHECKSUM\n", dev
->name
);
1572 skb_reserve(skb
, 2); /* 16 byte align the IP header */
1573 pci_dma_sync_single_for_cpu(hmp
->pci_dev
,
1574 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1576 PCI_DMA_FROMDEVICE
);
1577 /* Call copy + cksum if available. */
1578 #if 1 || USE_IP_COPYSUM
1579 skb_copy_to_linear_data(skb
,
1580 hmp
->rx_skbuff
[entry
]->data
, pkt_len
);
1581 skb_put(skb
, pkt_len
);
1583 memcpy(skb_put(skb
, pkt_len
), hmp
->rx_ring_dma
1584 + entry
*sizeof(*desc
), pkt_len
);
1586 pci_dma_sync_single_for_device(hmp
->pci_dev
,
1587 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1589 PCI_DMA_FROMDEVICE
);
1591 pci_unmap_single(hmp
->pci_dev
,
1592 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1593 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1594 skb_put(skb
= hmp
->rx_skbuff
[entry
], pkt_len
);
1595 hmp
->rx_skbuff
[entry
] = NULL
;
1597 skb
->protocol
= eth_type_trans(skb
, dev
);
1601 /* TCP or UDP on ipv4, DIX encoding */
1602 if (pfck
>>24 == 0x91 || pfck
>>24 == 0x51) {
1603 struct iphdr
*ih
= (struct iphdr
*) skb
->data
;
1604 /* Check that IP packet is at least 46 bytes, otherwise,
1605 * there may be pad bytes included in the hardware checksum.
1606 * This wouldn't happen if everyone padded with 0.
1608 if (ntohs(ih
->tot_len
) >= 46){
1609 /* don't worry about frags */
1610 if (!(ih
->frag_off
& cpu_to_be16(IP_MF
|IP_OFFSET
))) {
1611 u32 inv
= *(u32
*) &buf_addr
[data_size
- 16];
1612 u32
*p
= (u32
*) &buf_addr
[data_size
- 20];
1613 register u32 crc
, p_r
, p_r1
;
1623 crc
= (p_r
& 0xffff) + (p_r
>> 16);
1626 crc
= (p_r
>> 16) + (p_r
& 0xffff)
1627 + (p_r1
>> 16 & 0xff00);
1630 crc
= p_r
+ (p_r1
>> 16);
1633 crc
= p_r
+ (p_r1
& 0xff00) + (p_r1
>> 16);
1635 default: /*NOTREACHED*/ crc
= 0;
1637 if (crc
& 0xffff0000) {
1641 /* tcp/udp will add in pseudo */
1642 skb
->csum
= ntohs(pfck
& 0xffff);
1643 if (skb
->csum
> crc
)
1646 skb
->csum
+= (~crc
& 0xffff);
1648 * could do the pseudo myself and return
1649 * CHECKSUM_UNNECESSARY
1651 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1655 #endif /* RX_CHECKSUM */
1658 hmp
->stats
.rx_packets
++;
1660 entry
= (++hmp
->cur_rx
) % RX_RING_SIZE
;
1663 /* Refill the Rx ring buffers. */
1664 for (; hmp
->cur_rx
- hmp
->dirty_rx
> 0; hmp
->dirty_rx
++) {
1665 struct hamachi_desc
*desc
;
1667 entry
= hmp
->dirty_rx
% RX_RING_SIZE
;
1668 desc
= &(hmp
->rx_ring
[entry
]);
1669 if (hmp
->rx_skbuff
[entry
] == NULL
) {
1670 struct sk_buff
*skb
= dev_alloc_skb(hmp
->rx_buf_sz
);
1672 hmp
->rx_skbuff
[entry
] = skb
;
1674 break; /* Better luck next round. */
1675 skb
->dev
= dev
; /* Mark as being used by this device. */
1676 skb_reserve(skb
, 2); /* Align IP on 16 byte boundaries */
1677 desc
->addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1678 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1680 desc
->status_n_length
= cpu_to_le32(hmp
->rx_buf_sz
);
1681 if (entry
>= RX_RING_SIZE
-1)
1682 desc
->status_n_length
|= cpu_to_le32(DescOwn
|
1683 DescEndPacket
| DescEndRing
| DescIntr
);
1685 desc
->status_n_length
|= cpu_to_le32(DescOwn
|
1686 DescEndPacket
| DescIntr
);
1689 /* Restart Rx engine if stopped. */
1690 /* If we don't need to check status, don't. -KDU */
1691 if (readw(hmp
->base
+ RxStatus
) & 0x0002)
1692 writew(0x0001, hmp
->base
+ RxCmd
);
1697 /* This is more properly named "uncommon interrupt events", as it covers more
1698 than just errors. */
1699 static void hamachi_error(struct net_device
*dev
, int intr_status
)
1701 struct hamachi_private
*hmp
= netdev_priv(dev
);
1702 void __iomem
*ioaddr
= hmp
->base
;
1704 if (intr_status
& (LinkChange
|NegotiationChange
)) {
1705 if (hamachi_debug
> 1)
1706 printk(KERN_INFO
"%s: Link changed: AutoNegotiation Ctrl"
1707 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1708 dev
->name
, readw(ioaddr
+ 0x0E0), readw(ioaddr
+ 0x0E2),
1709 readw(ioaddr
+ ANLinkPartnerAbility
),
1710 readl(ioaddr
+ IntrStatus
));
1711 if (readw(ioaddr
+ ANStatus
) & 0x20)
1712 writeb(0x01, ioaddr
+ LEDCtrl
);
1714 writeb(0x03, ioaddr
+ LEDCtrl
);
1716 if (intr_status
& StatsMax
) {
1717 hamachi_get_stats(dev
);
1718 /* Read the overflow bits to clear. */
1719 readl(ioaddr
+ 0x370);
1720 readl(ioaddr
+ 0x3F0);
1722 if ((intr_status
& ~(LinkChange
|StatsMax
|NegotiationChange
|IntrRxDone
|IntrTxDone
))
1724 printk(KERN_ERR
"%s: Something Wicked happened! %4.4x.\n",
1725 dev
->name
, intr_status
);
1726 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1727 if (intr_status
& (IntrTxPCIErr
| IntrTxPCIFault
))
1728 hmp
->stats
.tx_fifo_errors
++;
1729 if (intr_status
& (IntrRxPCIErr
| IntrRxPCIFault
))
1730 hmp
->stats
.rx_fifo_errors
++;
1733 static int hamachi_close(struct net_device
*dev
)
1735 struct hamachi_private
*hmp
= netdev_priv(dev
);
1736 void __iomem
*ioaddr
= hmp
->base
;
1737 struct sk_buff
*skb
;
1740 netif_stop_queue(dev
);
1742 if (hamachi_debug
> 1) {
1743 printk(KERN_DEBUG
"%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1744 dev
->name
, readw(ioaddr
+ TxStatus
),
1745 readw(ioaddr
+ RxStatus
), readl(ioaddr
+ IntrStatus
));
1746 printk(KERN_DEBUG
"%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1747 dev
->name
, hmp
->cur_tx
, hmp
->dirty_tx
, hmp
->cur_rx
, hmp
->dirty_rx
);
1750 /* Disable interrupts by clearing the interrupt mask. */
1751 writel(0x0000, ioaddr
+ InterruptEnable
);
1753 /* Stop the chip's Tx and Rx processes. */
1754 writel(2, ioaddr
+ RxCmd
);
1755 writew(2, ioaddr
+ TxCmd
);
1758 if (hamachi_debug
> 2) {
1759 printk(KERN_DEBUG
" Tx ring at %8.8x:\n",
1760 (int)hmp
->tx_ring_dma
);
1761 for (i
= 0; i
< TX_RING_SIZE
; i
++)
1762 printk(KERN_DEBUG
" %c #%d desc. %8.8x %8.8x.\n",
1763 readl(ioaddr
+ TxCurPtr
) == (long)&hmp
->tx_ring
[i
] ? '>' : ' ',
1764 i
, hmp
->tx_ring
[i
].status_n_length
, hmp
->tx_ring
[i
].addr
);
1765 printk(KERN_DEBUG
" Rx ring %8.8x:\n",
1766 (int)hmp
->rx_ring_dma
);
1767 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1768 printk(KERN_DEBUG
" %c #%d desc. %4.4x %8.8x\n",
1769 readl(ioaddr
+ RxCurPtr
) == (long)&hmp
->rx_ring
[i
] ? '>' : ' ',
1770 i
, hmp
->rx_ring
[i
].status_n_length
, hmp
->rx_ring
[i
].addr
);
1771 if (hamachi_debug
> 6) {
1772 if (*(u8
*)hmp
->rx_skbuff
[i
]->data
!= 0x69) {
1774 hmp
->rx_skbuff
[i
]->data
;
1776 printk(KERN_DEBUG
"Addr: ");
1777 for (j
= 0; j
< 0x50; j
++)
1778 printk(" %4.4x", addr
[j
]);
1784 #endif /* __i386__ debugging only */
1786 free_irq(dev
->irq
, dev
);
1788 del_timer_sync(&hmp
->timer
);
1790 /* Free all the skbuffs in the Rx queue. */
1791 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1792 skb
= hmp
->rx_skbuff
[i
];
1793 hmp
->rx_ring
[i
].status_n_length
= 0;
1795 pci_unmap_single(hmp
->pci_dev
,
1796 leXX_to_cpu(hmp
->rx_ring
[i
].addr
),
1797 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1799 hmp
->rx_skbuff
[i
] = NULL
;
1801 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(0xBADF00D0); /* An invalid address. */
1803 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
1804 skb
= hmp
->tx_skbuff
[i
];
1806 pci_unmap_single(hmp
->pci_dev
,
1807 leXX_to_cpu(hmp
->tx_ring
[i
].addr
),
1808 skb
->len
, PCI_DMA_TODEVICE
);
1810 hmp
->tx_skbuff
[i
] = NULL
;
1814 writeb(0x00, ioaddr
+ LEDCtrl
);
1819 static struct net_device_stats
*hamachi_get_stats(struct net_device
*dev
)
1821 struct hamachi_private
*hmp
= netdev_priv(dev
);
1822 void __iomem
*ioaddr
= hmp
->base
;
1824 /* We should lock this segment of code for SMP eventually, although
1825 the vulnerability window is very small and statistics are
1827 /* Ok, what goes here? This appears to be stuck at 21 packets
1828 according to ifconfig. It does get incremented in hamachi_tx(),
1829 so I think I'll comment it out here and see if better things
1832 /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
1834 hmp
->stats
.rx_bytes
= readl(ioaddr
+ 0x330); /* Total Uni+Brd+Multi */
1835 hmp
->stats
.tx_bytes
= readl(ioaddr
+ 0x3B0); /* Total Uni+Brd+Multi */
1836 hmp
->stats
.multicast
= readl(ioaddr
+ 0x320); /* Multicast Rx */
1838 hmp
->stats
.rx_length_errors
= readl(ioaddr
+ 0x368); /* Over+Undersized */
1839 hmp
->stats
.rx_over_errors
= readl(ioaddr
+ 0x35C); /* Jabber */
1840 hmp
->stats
.rx_crc_errors
= readl(ioaddr
+ 0x360); /* Jabber */
1841 hmp
->stats
.rx_frame_errors
= readl(ioaddr
+ 0x364); /* Symbol Errs */
1842 hmp
->stats
.rx_missed_errors
= readl(ioaddr
+ 0x36C); /* Dropped */
1847 static void set_rx_mode(struct net_device
*dev
)
1849 struct hamachi_private
*hmp
= netdev_priv(dev
);
1850 void __iomem
*ioaddr
= hmp
->base
;
1852 if (dev
->flags
& IFF_PROMISC
) { /* Set promiscuous. */
1853 writew(0x000F, ioaddr
+ AddrMode
);
1854 } else if ((dev
->mc_count
> 63) || (dev
->flags
& IFF_ALLMULTI
)) {
1855 /* Too many to match, or accept all multicasts. */
1856 writew(0x000B, ioaddr
+ AddrMode
);
1857 } else if (dev
->mc_count
> 0) { /* Must use the CAM filter. */
1858 struct dev_mc_list
*mclist
;
1860 for (i
= 0, mclist
= dev
->mc_list
; mclist
&& i
< dev
->mc_count
;
1861 i
++, mclist
= mclist
->next
) {
1862 writel(*(u32
*)(mclist
->dmi_addr
), ioaddr
+ 0x100 + i
*8);
1863 writel(0x20000 | (*(u16
*)&mclist
->dmi_addr
[4]),
1864 ioaddr
+ 0x104 + i
*8);
1866 /* Clear remaining entries. */
1868 writel(0, ioaddr
+ 0x104 + i
*8);
1869 writew(0x0003, ioaddr
+ AddrMode
);
1870 } else { /* Normal, unicast/broadcast-only mode. */
1871 writew(0x0001, ioaddr
+ AddrMode
);
1875 static int check_if_running(struct net_device
*dev
)
1877 if (!netif_running(dev
))
1882 static void hamachi_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1884 struct hamachi_private
*np
= netdev_priv(dev
);
1885 strcpy(info
->driver
, DRV_NAME
);
1886 strcpy(info
->version
, DRV_VERSION
);
1887 strcpy(info
->bus_info
, pci_name(np
->pci_dev
));
1890 static int hamachi_get_settings(struct net_device
*dev
, struct ethtool_cmd
*ecmd
)
1892 struct hamachi_private
*np
= netdev_priv(dev
);
1893 spin_lock_irq(&np
->lock
);
1894 mii_ethtool_gset(&np
->mii_if
, ecmd
);
1895 spin_unlock_irq(&np
->lock
);
1899 static int hamachi_set_settings(struct net_device
*dev
, struct ethtool_cmd
*ecmd
)
1901 struct hamachi_private
*np
= netdev_priv(dev
);
1903 spin_lock_irq(&np
->lock
);
1904 res
= mii_ethtool_sset(&np
->mii_if
, ecmd
);
1905 spin_unlock_irq(&np
->lock
);
1909 static int hamachi_nway_reset(struct net_device
*dev
)
1911 struct hamachi_private
*np
= netdev_priv(dev
);
1912 return mii_nway_restart(&np
->mii_if
);
1915 static u32
hamachi_get_link(struct net_device
*dev
)
1917 struct hamachi_private
*np
= netdev_priv(dev
);
1918 return mii_link_ok(&np
->mii_if
);
1921 static const struct ethtool_ops ethtool_ops
= {
1922 .begin
= check_if_running
,
1923 .get_drvinfo
= hamachi_get_drvinfo
,
1924 .get_settings
= hamachi_get_settings
,
1925 .set_settings
= hamachi_set_settings
,
1926 .nway_reset
= hamachi_nway_reset
,
1927 .get_link
= hamachi_get_link
,
1930 static const struct ethtool_ops ethtool_ops_no_mii
= {
1931 .begin
= check_if_running
,
1932 .get_drvinfo
= hamachi_get_drvinfo
,
1935 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1937 struct hamachi_private
*np
= netdev_priv(dev
);
1938 struct mii_ioctl_data
*data
= if_mii(rq
);
1941 if (!netif_running(dev
))
1944 if (cmd
== (SIOCDEVPRIVATE
+3)) { /* set rx,tx intr params */
1945 u32
*d
= (u32
*)&rq
->ifr_ifru
;
1946 /* Should add this check here or an ordinary user can do nasty
1949 * TODO: Shut down the Rx and Tx engines while doing this.
1951 if (!capable(CAP_NET_ADMIN
))
1953 writel(d
[0], np
->base
+ TxIntrCtrl
);
1954 writel(d
[1], np
->base
+ RxIntrCtrl
);
1955 printk(KERN_NOTICE
"%s: tx %08x, rx %08x intr\n", dev
->name
,
1956 (u32
) readl(np
->base
+ TxIntrCtrl
),
1957 (u32
) readl(np
->base
+ RxIntrCtrl
));
1962 spin_lock_irq(&np
->lock
);
1963 rc
= generic_mii_ioctl(&np
->mii_if
, data
, cmd
, NULL
);
1964 spin_unlock_irq(&np
->lock
);
1971 static void __devexit
hamachi_remove_one (struct pci_dev
*pdev
)
1973 struct net_device
*dev
= pci_get_drvdata(pdev
);
1976 struct hamachi_private
*hmp
= netdev_priv(dev
);
1978 pci_free_consistent(pdev
, RX_TOTAL_SIZE
, hmp
->rx_ring
,
1980 pci_free_consistent(pdev
, TX_TOTAL_SIZE
, hmp
->tx_ring
,
1982 unregister_netdev(dev
);
1985 pci_release_regions(pdev
);
1986 pci_set_drvdata(pdev
, NULL
);
1990 static struct pci_device_id hamachi_pci_tbl
[] = {
1991 { 0x1318, 0x0911, PCI_ANY_ID
, PCI_ANY_ID
, },
1994 MODULE_DEVICE_TABLE(pci
, hamachi_pci_tbl
);
1996 static struct pci_driver hamachi_driver
= {
1998 .id_table
= hamachi_pci_tbl
,
1999 .probe
= hamachi_init_one
,
2000 .remove
= __devexit_p(hamachi_remove_one
),
2003 static int __init
hamachi_init (void)
2005 /* when a module, this is printed whether or not devices are found in probe */
2009 return pci_register_driver(&hamachi_driver
);
2012 static void __exit
hamachi_exit (void)
2014 pci_unregister_driver(&hamachi_driver
);
2018 module_init(hamachi_init
);
2019 module_exit(hamachi_exit
);