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 * 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov>
139 /* Operational parameters that usually are not changed. */
140 /* Time in jiffies before concluding the transmitter is hung. */
141 #define TX_TIMEOUT (5*HZ)
143 #include <linux/capability.h>
144 #include <linux/module.h>
145 #include <linux/kernel.h>
146 #include <linux/string.h>
147 #include <linux/timer.h>
148 #include <linux/time.h>
149 #include <linux/errno.h>
150 #include <linux/ioport.h>
151 #include <linux/interrupt.h>
152 #include <linux/pci.h>
153 #include <linux/init.h>
154 #include <linux/ethtool.h>
155 #include <linux/mii.h>
156 #include <linux/netdevice.h>
157 #include <linux/etherdevice.h>
158 #include <linux/skbuff.h>
159 #include <linux/ip.h>
160 #include <linux/delay.h>
161 #include <linux/bitops.h>
163 #include <linux/uaccess.h>
164 #include <asm/processor.h> /* Processor type for cache alignment. */
166 #include <asm/unaligned.h>
167 #include <asm/cache.h>
169 static const char version
[] =
170 KERN_INFO DRV_NAME
".c:v" DRV_VERSION
" " DRV_RELDATE
" Written by Donald Becker\n"
171 " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
172 " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
175 /* IP_MF appears to be only defined in <netinet/ip.h>, however,
176 we need it for hardware checksumming support. FYI... some of
177 the definitions in <netinet/ip.h> conflict/duplicate those in
178 other linux headers causing many compiler warnings.
181 #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
184 /* Define IP_OFFSET to be IPOPT_OFFSET */
187 #define IP_OFFSET IPOPT_OFFSET
193 #define RUN_AT(x) (jiffies + (x))
199 /* Condensed bus+endian portability operations. */
201 #define cpu_to_leXX(addr) cpu_to_le64(addr)
202 #define leXX_to_cpu(addr) le64_to_cpu(addr)
204 #define cpu_to_leXX(addr) cpu_to_le32(addr)
205 #define leXX_to_cpu(addr) le32_to_cpu(addr)
212 I. Board Compatibility
214 This device driver is designed for the Packet Engines "Hamachi"
215 Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
218 II. Board-specific settings
220 No jumpers exist on the board. The chip supports software correction of
221 various motherboard wiring errors, however this driver does not support
224 III. Driver operation
228 The Hamachi uses a typical descriptor based bus-master architecture.
229 The descriptor list is similar to that used by the Digital Tulip.
230 This driver uses two statically allocated fixed-size descriptor lists
231 formed into rings by a branch from the final descriptor to the beginning of
232 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
234 This driver uses a zero-copy receive and transmit scheme similar my other
236 The driver allocates full frame size skbuffs for the Rx ring buffers at
237 open() time and passes the skb->data field to the Hamachi as receive data
238 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
239 a fresh skbuff is allocated and the frame is copied to the new skbuff.
240 When the incoming frame is larger, the skbuff is passed directly up the
241 protocol stack and replaced by a newly allocated skbuff.
243 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
244 using a full-sized skbuff for small frames vs. the copying costs of larger
245 frames. Gigabit cards are typically used on generously configured machines
246 and the underfilled buffers have negligible impact compared to the benefit of
247 a single allocation size, so the default value of zero results in never
250 IIIb/c. Transmit/Receive Structure
252 The Rx and Tx descriptor structure are straight-forward, with no historical
253 baggage that must be explained. Unlike the awkward DBDMA structure, there
254 are no unused fields or option bits that had only one allowable setting.
256 Two details should be noted about the descriptors: The chip supports both 32
257 bit and 64 bit address structures, and the length field is overwritten on
258 the receive descriptors. The descriptor length is set in the control word
259 for each channel. The development driver uses 32 bit addresses only, however
260 64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
262 IIId. Synchronization
264 This driver is very similar to my other network drivers.
265 The driver runs as two independent, single-threaded flows of control. One
266 is the send-packet routine, which enforces single-threaded use by the
267 dev->tbusy flag. The other thread is the interrupt handler, which is single
268 threaded by the hardware and other software.
270 The send packet thread has partial control over the Tx ring and 'dev->tbusy'
271 flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
272 queue slot is empty, it clears the tbusy flag when finished otherwise it sets
273 the 'hmp->tx_full' flag.
275 The interrupt handler has exclusive control over the Rx ring and records stats
276 from the Tx ring. After reaping the stats, it marks the Tx queue entry as
277 empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
278 clears both the tx_full and tbusy flags.
282 Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
286 Hamachi Engineering Design Specification, 5/15/97
287 (Note: This version was marked "Confidential".)
295 01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
296 to help avoid some stall conditions -- this needs further research.
298 01/15/1999 EPK Creation of the hamachi_tx function. This function cleans
299 the Tx ring and is called from hamachi_start_xmit (this used to be
300 called from hamachi_interrupt but it tends to delay execution of the
301 interrupt handler and thus reduce bandwidth by reducing the latency
302 between hamachi_rx()'s). Notably, some modification has been made so
303 that the cleaning loop checks only to make sure that the DescOwn bit
304 isn't set in the status flag since the card is not required
305 to set the entire flag to zero after processing.
307 01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
308 checked before attempting to add a buffer to the ring. If the ring is full
309 an attempt is made to free any dirty buffers and thus find space for
310 the new buffer or the function returns non-zero which should case the
311 scheduler to reschedule the buffer later.
313 01/15/1999 EPK Some adjustments were made to the chip initialization.
314 End-to-end flow control should now be fully active and the interrupt
315 algorithm vars have been changed. These could probably use further tuning.
317 01/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
318 set the rx and tx latencies for the Hamachi interrupts. If you're having
319 problems with network stalls, try setting these to higher values.
320 Valid values are 0x00 through 0xff.
322 01/15/1999 EPK In general, the overall bandwidth has increased and
323 latencies are better (sometimes by a factor of 2). Stalls are rare at
324 this point, however there still appears to be a bug somewhere between the
325 hardware and driver. TCP checksum errors under load also appear to be
326 eliminated at this point.
328 01/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
329 Rx and Tx rings. This appears to have been affecting whether a particular
330 peer-to-peer connection would hang under high load. I believe the Rx
331 rings was typically getting set correctly, but the Tx ring wasn't getting
332 the DescEndRing bit set during initialization. ??? Does this mean the
333 hamachi card is using the DescEndRing in processing even if a particular
334 slot isn't in use -- hypothetically, the card might be searching the
335 entire Tx ring for slots with the DescOwn bit set and then processing
336 them. If the DescEndRing bit isn't set, then it might just wander off
337 through memory until it hits a chunk of data with that bit set
338 and then looping back.
340 02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
341 problem (TxCmd and RxCmd need only to be set when idle or stopped.
343 02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
344 (Michel Mueller pointed out the ``permanently busy'' potential
347 02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
349 02/23/1999 EPK Verified that the interrupt status field bits for Tx were
350 incorrectly defined and corrected (as per Michel Mueller).
352 02/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
353 were available before resetting the tbusy and tx_full flags
354 (as per Michel Mueller).
356 03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
358 12/31/1999 KDU Cleaned up assorted things and added Don's code to force
361 02/20/2000 KDU Some of the control was just plain odd. Cleaned up the
362 hamachi_start_xmit() and hamachi_interrupt() code. There is still some
363 re-structuring I would like to do.
365 03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
366 parameters on a dual P3-450 setup yielded the new default interrupt
367 mitigation parameters. Tx should interrupt VERY infrequently due to
368 Eric's scheme. Rx should be more often...
370 03/13/2000 KDU Added a patch to make the Rx Checksum code interact
371 nicely with non-linux machines.
373 03/13/2000 KDU Experimented with some of the configuration values:
375 -It seems that enabling PCI performance commands for descriptors
376 (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
377 performance impact for any of my tests. (ttcp, netpipe, netperf) I will
378 leave them that way until I hear further feedback.
380 -Increasing the PCI_LATENCY_TIMER to 130
381 (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
382 degrade performance. Leaving default at 64 pending further information.
384 03/14/2000 KDU Further tuning:
386 -adjusted boguscnt in hamachi_rx() to depend on interrupt
387 mitigation parameters chosen.
389 -Selected a set of interrupt parameters based on some extensive testing.
390 These may change with more testing.
394 -Consider borrowing from the acenic driver code to check PCI_COMMAND for
395 PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
398 -fix the reset procedure. It doesn't quite work.
401 /* A few values that may be tweaked. */
402 /* Size of each temporary Rx buffer, calculated as:
403 * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
404 * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum
406 #define PKT_BUF_SZ 1536
408 /* For now, this is going to be set to the maximum size of an ethernet
409 * packet. Eventually, we may want to make it a variable that is
412 #define MAX_FRAME_SIZE 1518
414 /* The rest of these values should never change. */
416 static void hamachi_timer(struct timer_list
*t
);
418 enum capability_flags
{CanHaveMII
=1, };
419 static const struct chip_info
{
420 u16 vendor_id
, device_id
, device_id_mask
, pad
;
422 void (*media_timer
)(struct timer_list
*t
);
425 {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer
, 0},
429 /* Offsets to the Hamachi registers. Various sizes. */
430 enum hamachi_offsets
{
431 TxDMACtrl
=0x00, TxCmd
=0x04, TxStatus
=0x06, TxPtr
=0x08, TxCurPtr
=0x10,
432 RxDMACtrl
=0x20, RxCmd
=0x24, RxStatus
=0x26, RxPtr
=0x28, RxCurPtr
=0x30,
433 PCIClkMeas
=0x060, MiscStatus
=0x066, ChipRev
=0x68, ChipReset
=0x06B,
434 LEDCtrl
=0x06C, VirtualJumpers
=0x06D, GPIO
=0x6E,
435 TxChecksum
=0x074, RxChecksum
=0x076,
436 TxIntrCtrl
=0x078, RxIntrCtrl
=0x07C,
437 InterruptEnable
=0x080, InterruptClear
=0x084, IntrStatus
=0x088,
439 MACCnfg
=0x0A0, FrameGap0
=0x0A2, FrameGap1
=0x0A4,
440 /* See enum MII_offsets below. */
441 MACCnfg2
=0x0B0, RxDepth
=0x0B8, FlowCtrl
=0x0BC, MaxFrameSize
=0x0CE,
442 AddrMode
=0x0D0, StationAddr
=0x0D2,
443 /* Gigabit AutoNegotiation. */
444 ANCtrl
=0x0E0, ANStatus
=0x0E2, ANXchngCtrl
=0x0E4, ANAdvertise
=0x0E8,
445 ANLinkPartnerAbility
=0x0EA,
446 EECmdStatus
=0x0F0, EEData
=0x0F1, EEAddr
=0x0F2,
450 /* Offsets to the MII-mode registers. */
452 MII_Cmd
=0xA6, MII_Addr
=0xA8, MII_Wr_Data
=0xAA, MII_Rd_Data
=0xAC,
456 /* Bits in the interrupt status/mask registers. */
457 enum intr_status_bits
{
458 IntrRxDone
=0x01, IntrRxPCIFault
=0x02, IntrRxPCIErr
=0x04,
459 IntrTxDone
=0x100, IntrTxPCIFault
=0x200, IntrTxPCIErr
=0x400,
460 LinkChange
=0x10000, NegotiationChange
=0x20000, StatsMax
=0x40000, };
462 /* The Hamachi Rx and Tx buffer descriptors. */
463 struct hamachi_desc
{
464 __le32 status_n_length
;
473 /* Bits in hamachi_desc.status_n_length */
474 enum desc_status_bits
{
475 DescOwn
=0x80000000, DescEndPacket
=0x40000000, DescEndRing
=0x20000000,
479 #define PRIV_ALIGN 15 /* Required alignment mask */
481 struct hamachi_private
{
482 /* Descriptor rings first for alignment. Tx requires a second descriptor
484 struct hamachi_desc
*rx_ring
;
485 struct hamachi_desc
*tx_ring
;
486 struct sk_buff
* rx_skbuff
[RX_RING_SIZE
];
487 struct sk_buff
* tx_skbuff
[TX_RING_SIZE
];
488 dma_addr_t tx_ring_dma
;
489 dma_addr_t rx_ring_dma
;
490 struct timer_list timer
; /* Media selection timer. */
491 /* Frequently used and paired value: keep adjacent for cache effect. */
494 unsigned int cur_rx
, dirty_rx
; /* Producer/consumer ring indices */
495 unsigned int cur_tx
, dirty_tx
;
496 unsigned int rx_buf_sz
; /* Based on MTU+slack. */
497 unsigned int tx_full
:1; /* The Tx queue is full. */
498 unsigned int duplex_lock
:1;
499 unsigned int default_port
:4; /* Last dev->if_port value. */
500 /* MII transceiver section. */
501 int mii_cnt
; /* MII device addresses. */
502 struct mii_if_info mii_if
; /* MII lib hooks/info */
503 unsigned char phys
[MII_CNT
]; /* MII device addresses, only first one used. */
504 u32 rx_int_var
, tx_int_var
; /* interrupt control variables */
505 u32 option
; /* Hold on to a copy of the options */
506 struct pci_dev
*pci_dev
;
510 MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
511 MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
512 MODULE_LICENSE("GPL");
514 module_param(max_interrupt_work
, int, 0);
515 module_param(mtu
, int, 0);
516 module_param(debug
, int, 0);
517 module_param(min_rx_pkt
, int, 0);
518 module_param(max_rx_gap
, int, 0);
519 module_param(max_rx_latency
, int, 0);
520 module_param(min_tx_pkt
, int, 0);
521 module_param(max_tx_gap
, int, 0);
522 module_param(max_tx_latency
, int, 0);
523 module_param(rx_copybreak
, int, 0);
524 module_param_array(rx_params
, int, NULL
, 0);
525 module_param_array(tx_params
, int, NULL
, 0);
526 module_param_array(options
, int, NULL
, 0);
527 module_param_array(full_duplex
, int, NULL
, 0);
528 module_param(force32
, int, 0);
529 MODULE_PARM_DESC(max_interrupt_work
, "GNIC-II maximum events handled per interrupt");
530 MODULE_PARM_DESC(mtu
, "GNIC-II MTU (all boards)");
531 MODULE_PARM_DESC(debug
, "GNIC-II debug level (0-7)");
532 MODULE_PARM_DESC(min_rx_pkt
, "GNIC-II minimum Rx packets processed between interrupts");
533 MODULE_PARM_DESC(max_rx_gap
, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
534 MODULE_PARM_DESC(max_rx_latency
, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
535 MODULE_PARM_DESC(min_tx_pkt
, "GNIC-II minimum Tx packets processed between interrupts");
536 MODULE_PARM_DESC(max_tx_gap
, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
537 MODULE_PARM_DESC(max_tx_latency
, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
538 MODULE_PARM_DESC(rx_copybreak
, "GNIC-II copy breakpoint for copy-only-tiny-frames");
539 MODULE_PARM_DESC(rx_params
, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
540 MODULE_PARM_DESC(tx_params
, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
541 MODULE_PARM_DESC(options
, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
542 MODULE_PARM_DESC(full_duplex
, "GNIC-II full duplex setting(s) (1)");
543 MODULE_PARM_DESC(force32
, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)");
545 static int read_eeprom(void __iomem
*ioaddr
, int location
);
546 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
);
547 static void mdio_write(struct net_device
*dev
, int phy_id
, int location
, int value
);
548 static int hamachi_open(struct net_device
*dev
);
549 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
550 static void hamachi_timer(struct timer_list
*t
);
551 static void hamachi_tx_timeout(struct net_device
*dev
);
552 static void hamachi_init_ring(struct net_device
*dev
);
553 static netdev_tx_t
hamachi_start_xmit(struct sk_buff
*skb
,
554 struct net_device
*dev
);
555 static irqreturn_t
hamachi_interrupt(int irq
, void *dev_instance
);
556 static int hamachi_rx(struct net_device
*dev
);
557 static inline int hamachi_tx(struct net_device
*dev
);
558 static void hamachi_error(struct net_device
*dev
, int intr_status
);
559 static int hamachi_close(struct net_device
*dev
);
560 static struct net_device_stats
*hamachi_get_stats(struct net_device
*dev
);
561 static void set_rx_mode(struct net_device
*dev
);
562 static const struct ethtool_ops ethtool_ops
;
563 static const struct ethtool_ops ethtool_ops_no_mii
;
565 static const struct net_device_ops hamachi_netdev_ops
= {
566 .ndo_open
= hamachi_open
,
567 .ndo_stop
= hamachi_close
,
568 .ndo_start_xmit
= hamachi_start_xmit
,
569 .ndo_get_stats
= hamachi_get_stats
,
570 .ndo_set_rx_mode
= set_rx_mode
,
571 .ndo_validate_addr
= eth_validate_addr
,
572 .ndo_set_mac_address
= eth_mac_addr
,
573 .ndo_tx_timeout
= hamachi_tx_timeout
,
574 .ndo_do_ioctl
= netdev_ioctl
,
578 static int hamachi_init_one(struct pci_dev
*pdev
,
579 const struct pci_device_id
*ent
)
581 struct hamachi_private
*hmp
;
582 int option
, i
, rx_int_var
, tx_int_var
, boguscnt
;
583 int chip_id
= ent
->driver_data
;
585 void __iomem
*ioaddr
;
588 struct net_device
*dev
;
593 /* when built into the kernel, we only print version if device is found */
595 static int printed_version
;
596 if (!printed_version
++)
600 if (pci_enable_device(pdev
)) {
605 base
= pci_resource_start(pdev
, 0);
606 #ifdef __alpha__ /* Really "64 bit addrs" */
607 base
|= (pci_resource_start(pdev
, 1) << 32);
610 pci_set_master(pdev
);
612 i
= pci_request_regions(pdev
, DRV_NAME
);
617 ioaddr
= ioremap(base
, 0x400);
619 goto err_out_release
;
621 dev
= alloc_etherdev(sizeof(struct hamachi_private
));
623 goto err_out_iounmap
;
625 SET_NETDEV_DEV(dev
, &pdev
->dev
);
627 for (i
= 0; i
< 6; i
++)
628 dev
->dev_addr
[i
] = 1 ? read_eeprom(ioaddr
, 4 + i
)
629 : readb(ioaddr
+ StationAddr
+ i
);
631 #if ! defined(final_version)
632 if (hamachi_debug
> 4)
633 for (i
= 0; i
< 0x10; i
++)
635 read_eeprom(ioaddr
, i
), i
% 16 != 15 ? " " : "\n");
638 hmp
= netdev_priv(dev
);
639 spin_lock_init(&hmp
->lock
);
641 hmp
->mii_if
.dev
= dev
;
642 hmp
->mii_if
.mdio_read
= mdio_read
;
643 hmp
->mii_if
.mdio_write
= mdio_write
;
644 hmp
->mii_if
.phy_id_mask
= 0x1f;
645 hmp
->mii_if
.reg_num_mask
= 0x1f;
647 ring_space
= pci_alloc_consistent(pdev
, TX_TOTAL_SIZE
, &ring_dma
);
649 goto err_out_cleardev
;
650 hmp
->tx_ring
= ring_space
;
651 hmp
->tx_ring_dma
= ring_dma
;
653 ring_space
= pci_alloc_consistent(pdev
, RX_TOTAL_SIZE
, &ring_dma
);
655 goto err_out_unmap_tx
;
656 hmp
->rx_ring
= ring_space
;
657 hmp
->rx_ring_dma
= ring_dma
;
659 /* Check for options being passed in */
660 option
= card_idx
< MAX_UNITS
? options
[card_idx
] : 0;
662 option
= dev
->mem_start
;
664 /* If the bus size is misidentified, do the following. */
665 force32
= force32
? force32
:
666 ((option
>= 0) ? ((option
& 0x00000070) >> 4) : 0 );
668 writeb(force32
, ioaddr
+ VirtualJumpers
);
670 /* Hmmm, do we really need to reset the chip???. */
671 writeb(0x01, ioaddr
+ ChipReset
);
673 /* After a reset, the clock speed measurement of the PCI bus will not
674 * be valid for a moment. Wait for a little while until it is. If
675 * it takes more than 10ms, forget it.
678 i
= readb(ioaddr
+ PCIClkMeas
);
679 for (boguscnt
= 0; (!(i
& 0x080)) && boguscnt
< 1000; boguscnt
++){
681 i
= readb(ioaddr
+ PCIClkMeas
);
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
->netdev_ops
= &hamachi_netdev_ops
;
726 dev
->ethtool_ops
= (chip_tbl
[hmp
->chip_id
].flags
& CanHaveMII
) ?
727 ðtool_ops
: ðtool_ops_no_mii
;
728 dev
->watchdog_timeo
= TX_TIMEOUT
;
732 i
= register_netdev(dev
);
735 goto err_out_unmap_rx
;
738 printk(KERN_INFO
"%s: %s type %x at %p, %pM, IRQ %d.\n",
739 dev
->name
, chip_tbl
[chip_id
].name
, readl(ioaddr
+ ChipRev
),
740 ioaddr
, dev
->dev_addr
, irq
);
741 i
= readb(ioaddr
+ PCIClkMeas
);
742 printk(KERN_INFO
"%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
743 "%2.2x, LPA %4.4x.\n",
744 dev
->name
, readw(ioaddr
+ MiscStatus
) & 1 ? 64 : 32,
745 i
? 2000/(i
&0x7f) : 0, i
&0x7f, (int)readb(ioaddr
+ VirtualJumpers
),
746 readw(ioaddr
+ ANLinkPartnerAbility
));
748 if (chip_tbl
[hmp
->chip_id
].flags
& CanHaveMII
) {
749 int phy
, phy_idx
= 0;
750 for (phy
= 0; phy
< 32 && phy_idx
< MII_CNT
; phy
++) {
751 int mii_status
= mdio_read(dev
, phy
, MII_BMSR
);
752 if (mii_status
!= 0xffff &&
753 mii_status
!= 0x0000) {
754 hmp
->phys
[phy_idx
++] = phy
;
755 hmp
->mii_if
.advertising
= mdio_read(dev
, phy
, MII_ADVERTISE
);
756 printk(KERN_INFO
"%s: MII PHY found at address %d, status "
757 "0x%4.4x advertising %4.4x.\n",
758 dev
->name
, phy
, mii_status
, hmp
->mii_if
.advertising
);
761 hmp
->mii_cnt
= phy_idx
;
762 if (hmp
->mii_cnt
> 0)
763 hmp
->mii_if
.phy_id
= hmp
->phys
[0];
765 memset(&hmp
->mii_if
, 0, sizeof(hmp
->mii_if
));
767 /* Configure gigabit autonegotiation. */
768 writew(0x0400, ioaddr
+ ANXchngCtrl
); /* Enable legacy links. */
769 writew(0x08e0, ioaddr
+ ANAdvertise
); /* Set our advertise word. */
770 writew(0x1000, ioaddr
+ ANCtrl
); /* Enable negotiation */
776 pci_free_consistent(pdev
, RX_TOTAL_SIZE
, hmp
->rx_ring
,
779 pci_free_consistent(pdev
, TX_TOTAL_SIZE
, hmp
->tx_ring
,
786 pci_release_regions(pdev
);
791 static int read_eeprom(void __iomem
*ioaddr
, int location
)
793 int bogus_cnt
= 1000;
795 /* We should check busy first - per docs -KDU */
796 while ((readb(ioaddr
+ EECmdStatus
) & 0x40) && --bogus_cnt
> 0);
797 writew(location
, ioaddr
+ EEAddr
);
798 writeb(0x02, ioaddr
+ EECmdStatus
);
800 while ((readb(ioaddr
+ EECmdStatus
) & 0x40) && --bogus_cnt
> 0);
801 if (hamachi_debug
> 5)
802 printk(" EEPROM status is %2.2x after %d ticks.\n",
803 (int)readb(ioaddr
+ EECmdStatus
), 1000- bogus_cnt
);
804 return readb(ioaddr
+ EEData
);
807 /* MII Managemen Data I/O accesses.
808 These routines assume the MDIO controller is idle, and do not exit until
809 the command is finished. */
811 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
)
813 struct hamachi_private
*hmp
= netdev_priv(dev
);
814 void __iomem
*ioaddr
= hmp
->base
;
817 /* We should check busy first - per docs -KDU */
818 for (i
= 10000; i
>= 0; i
--)
819 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
821 writew((phy_id
<<8) + location
, ioaddr
+ MII_Addr
);
822 writew(0x0001, ioaddr
+ MII_Cmd
);
823 for (i
= 10000; i
>= 0; i
--)
824 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
826 return readw(ioaddr
+ MII_Rd_Data
);
829 static void mdio_write(struct net_device
*dev
, int phy_id
, int location
, int value
)
831 struct hamachi_private
*hmp
= netdev_priv(dev
);
832 void __iomem
*ioaddr
= hmp
->base
;
835 /* We should check busy first - per docs -KDU */
836 for (i
= 10000; i
>= 0; i
--)
837 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
839 writew((phy_id
<<8) + location
, ioaddr
+ MII_Addr
);
840 writew(value
, ioaddr
+ MII_Wr_Data
);
842 /* Wait for the command to finish. */
843 for (i
= 10000; i
>= 0; i
--)
844 if ((readw(ioaddr
+ MII_Status
) & 1) == 0)
849 static int hamachi_open(struct net_device
*dev
)
851 struct hamachi_private
*hmp
= netdev_priv(dev
);
852 void __iomem
*ioaddr
= hmp
->base
;
854 u32 rx_int_var
, tx_int_var
;
857 i
= request_irq(hmp
->pci_dev
->irq
, hamachi_interrupt
, IRQF_SHARED
,
862 hamachi_init_ring(dev
);
865 /* writellll anyone ? */
866 writel(hmp
->rx_ring_dma
, ioaddr
+ RxPtr
);
867 writel(hmp
->rx_ring_dma
>> 32, ioaddr
+ RxPtr
+ 4);
868 writel(hmp
->tx_ring_dma
, ioaddr
+ TxPtr
);
869 writel(hmp
->tx_ring_dma
>> 32, ioaddr
+ TxPtr
+ 4);
871 writel(hmp
->rx_ring_dma
, ioaddr
+ RxPtr
);
872 writel(hmp
->tx_ring_dma
, ioaddr
+ TxPtr
);
875 /* TODO: It would make sense to organize this as words since the card
876 * documentation does. -KDU
878 for (i
= 0; i
< 6; i
++)
879 writeb(dev
->dev_addr
[i
], ioaddr
+ StationAddr
+ i
);
881 /* Initialize other registers: with so many this eventually this will
882 converted to an offset/value list. */
884 /* Configure the FIFO */
885 fifo_info
= (readw(ioaddr
+ GPIO
) & 0x00C0) >> 6;
889 writew(0x0000, ioaddr
+ FIFOcfg
);
892 /* Configure the FIFO for 512K external, 16K used for Tx. */
893 writew(0x0028, ioaddr
+ FIFOcfg
);
896 /* Configure the FIFO for 1024 external, 32K used for Tx. */
897 writew(0x004C, ioaddr
+ FIFOcfg
);
900 /* Configure the FIFO for 2048 external, 32K used for Tx. */
901 writew(0x006C, ioaddr
+ FIFOcfg
);
904 printk(KERN_WARNING
"%s: Unsupported external memory config!\n",
906 /* Default to no FIFO */
907 writew(0x0000, ioaddr
+ FIFOcfg
);
911 if (dev
->if_port
== 0)
912 dev
->if_port
= hmp
->default_port
;
915 /* Setting the Rx mode will start the Rx process. */
916 /* If someone didn't choose a duplex, default to full-duplex */
917 if (hmp
->duplex_lock
!= 1)
918 hmp
->mii_if
.full_duplex
= 1;
920 /* always 1, takes no more time to do it */
921 writew(0x0001, ioaddr
+ RxChecksum
);
922 writew(0x0000, ioaddr
+ TxChecksum
);
923 writew(0x8000, ioaddr
+ MACCnfg
); /* Soft reset the MAC */
924 writew(0x215F, ioaddr
+ MACCnfg
);
925 writew(0x000C, ioaddr
+ FrameGap0
);
926 /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
927 writew(0x1018, ioaddr
+ FrameGap1
);
928 /* Why do we enable receives/transmits here? -KDU */
929 writew(0x0780, ioaddr
+ MACCnfg2
); /* Upper 16 bits control LEDs. */
930 /* Enable automatic generation of flow control frames, period 0xffff. */
931 writel(0x0030FFFF, ioaddr
+ FlowCtrl
);
932 writew(MAX_FRAME_SIZE
, ioaddr
+ MaxFrameSize
); /* dev->mtu+14 ??? */
934 /* Enable legacy links. */
935 writew(0x0400, ioaddr
+ ANXchngCtrl
); /* Enable legacy links. */
936 /* Initial Link LED to blinking red. */
937 writeb(0x03, ioaddr
+ LEDCtrl
);
939 /* Configure interrupt mitigation. This has a great effect on
940 performance, so systems tuning should start here!. */
942 rx_int_var
= hmp
->rx_int_var
;
943 tx_int_var
= hmp
->tx_int_var
;
945 if (hamachi_debug
> 1) {
946 printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
947 tx_int_var
& 0x00ff, (tx_int_var
& 0x00ff00) >> 8,
948 (tx_int_var
& 0x00ff0000) >> 16);
949 printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
950 rx_int_var
& 0x00ff, (rx_int_var
& 0x00ff00) >> 8,
951 (rx_int_var
& 0x00ff0000) >> 16);
952 printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var
, tx_int_var
);
955 writel(tx_int_var
, ioaddr
+ TxIntrCtrl
);
956 writel(rx_int_var
, ioaddr
+ RxIntrCtrl
);
960 netif_start_queue(dev
);
962 /* Enable interrupts by setting the interrupt mask. */
963 writel(0x80878787, ioaddr
+ InterruptEnable
);
964 writew(0x0000, ioaddr
+ EventStatus
); /* Clear non-interrupting events */
966 /* Configure and start the DMA channels. */
967 /* Burst sizes are in the low three bits: size = 4<<(val&7) */
969 writew(0x005D, ioaddr
+ RxDMACtrl
); /* 128 dword bursts */
970 writew(0x005D, ioaddr
+ TxDMACtrl
);
972 writew(0x001D, ioaddr
+ RxDMACtrl
);
973 writew(0x001D, ioaddr
+ TxDMACtrl
);
975 writew(0x0001, ioaddr
+ RxCmd
);
977 if (hamachi_debug
> 2) {
978 printk(KERN_DEBUG
"%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
979 dev
->name
, readw(ioaddr
+ RxStatus
), readw(ioaddr
+ TxStatus
));
981 /* Set the timer to check for link beat. */
982 timer_setup(&hmp
->timer
, hamachi_timer
, 0);
983 hmp
->timer
.expires
= RUN_AT((24*HZ
)/10); /* 2.4 sec. */
984 add_timer(&hmp
->timer
);
989 static inline int hamachi_tx(struct net_device
*dev
)
991 struct hamachi_private
*hmp
= netdev_priv(dev
);
993 /* Update the dirty pointer until we find an entry that is
994 still owned by the card */
995 for (; hmp
->cur_tx
- hmp
->dirty_tx
> 0; hmp
->dirty_tx
++) {
996 int entry
= hmp
->dirty_tx
% TX_RING_SIZE
;
999 if (hmp
->tx_ring
[entry
].status_n_length
& cpu_to_le32(DescOwn
))
1001 /* Free the original skb. */
1002 skb
= hmp
->tx_skbuff
[entry
];
1004 pci_unmap_single(hmp
->pci_dev
,
1005 leXX_to_cpu(hmp
->tx_ring
[entry
].addr
),
1006 skb
->len
, PCI_DMA_TODEVICE
);
1008 hmp
->tx_skbuff
[entry
] = NULL
;
1010 hmp
->tx_ring
[entry
].status_n_length
= 0;
1011 if (entry
>= TX_RING_SIZE
-1)
1012 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|=
1013 cpu_to_le32(DescEndRing
);
1014 dev
->stats
.tx_packets
++;
1020 static void hamachi_timer(struct timer_list
*t
)
1022 struct hamachi_private
*hmp
= from_timer(hmp
, t
, timer
);
1023 struct net_device
*dev
= hmp
->mii_if
.dev
;
1024 void __iomem
*ioaddr
= hmp
->base
;
1025 int next_tick
= 10*HZ
;
1027 if (hamachi_debug
> 2) {
1028 printk(KERN_INFO
"%s: Hamachi Autonegotiation status %4.4x, LPA "
1029 "%4.4x.\n", dev
->name
, readw(ioaddr
+ ANStatus
),
1030 readw(ioaddr
+ ANLinkPartnerAbility
));
1031 printk(KERN_INFO
"%s: Autonegotiation regs %4.4x %4.4x %4.4x "
1032 "%4.4x %4.4x %4.4x.\n", dev
->name
,
1033 readw(ioaddr
+ 0x0e0),
1034 readw(ioaddr
+ 0x0e2),
1035 readw(ioaddr
+ 0x0e4),
1036 readw(ioaddr
+ 0x0e6),
1037 readw(ioaddr
+ 0x0e8),
1038 readw(ioaddr
+ 0x0eA));
1040 /* We could do something here... nah. */
1041 hmp
->timer
.expires
= RUN_AT(next_tick
);
1042 add_timer(&hmp
->timer
);
1045 static void hamachi_tx_timeout(struct net_device
*dev
)
1048 struct hamachi_private
*hmp
= netdev_priv(dev
);
1049 void __iomem
*ioaddr
= hmp
->base
;
1051 printk(KERN_WARNING
"%s: Hamachi transmit timed out, status %8.8x,"
1052 " resetting...\n", dev
->name
, (int)readw(ioaddr
+ TxStatus
));
1055 printk(KERN_DEBUG
" Rx ring %p: ", hmp
->rx_ring
);
1056 for (i
= 0; i
< RX_RING_SIZE
; i
++)
1057 printk(KERN_CONT
" %8.8x",
1058 le32_to_cpu(hmp
->rx_ring
[i
].status_n_length
));
1059 printk(KERN_CONT
"\n");
1060 printk(KERN_DEBUG
" Tx ring %p: ", hmp
->tx_ring
);
1061 for (i
= 0; i
< TX_RING_SIZE
; i
++)
1062 printk(KERN_CONT
" %4.4x",
1063 le32_to_cpu(hmp
->tx_ring
[i
].status_n_length
));
1064 printk(KERN_CONT
"\n");
1067 /* Reinit the hardware and make sure the Rx and Tx processes
1071 /* The right way to do Reset. -KDU
1072 * -Clear OWN bit in all Rx/Tx descriptors
1073 * -Wait 50 uS for channels to go idle
1074 * -Turn off MAC receiver
1078 for (i
= 0; i
< RX_RING_SIZE
; i
++)
1079 hmp
->rx_ring
[i
].status_n_length
&= cpu_to_le32(~DescOwn
);
1081 /* Presume that all packets in the Tx queue are gone if we have to
1082 * re-init the hardware.
1084 for (i
= 0; i
< TX_RING_SIZE
; i
++){
1085 struct sk_buff
*skb
;
1087 if (i
>= TX_RING_SIZE
- 1)
1088 hmp
->tx_ring
[i
].status_n_length
=
1089 cpu_to_le32(DescEndRing
) |
1090 (hmp
->tx_ring
[i
].status_n_length
&
1091 cpu_to_le32(0x0000ffff));
1093 hmp
->tx_ring
[i
].status_n_length
&= cpu_to_le32(0x0000ffff);
1094 skb
= hmp
->tx_skbuff
[i
];
1096 pci_unmap_single(hmp
->pci_dev
, leXX_to_cpu(hmp
->tx_ring
[i
].addr
),
1097 skb
->len
, PCI_DMA_TODEVICE
);
1099 hmp
->tx_skbuff
[i
] = NULL
;
1103 udelay(60); /* Sleep 60 us just for safety sake */
1104 writew(0x0002, ioaddr
+ RxCmd
); /* STOP Rx */
1106 writeb(0x01, ioaddr
+ ChipReset
); /* Reinit the hardware */
1109 hmp
->cur_rx
= hmp
->cur_tx
= 0;
1110 hmp
->dirty_rx
= hmp
->dirty_tx
= 0;
1111 /* Rx packets are also presumed lost; however, we need to make sure a
1112 * ring of buffers is in tact. -KDU
1114 for (i
= 0; i
< RX_RING_SIZE
; i
++){
1115 struct sk_buff
*skb
= hmp
->rx_skbuff
[i
];
1118 pci_unmap_single(hmp
->pci_dev
,
1119 leXX_to_cpu(hmp
->rx_ring
[i
].addr
),
1120 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1122 hmp
->rx_skbuff
[i
] = NULL
;
1125 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1126 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1127 struct sk_buff
*skb
;
1129 skb
= netdev_alloc_skb_ip_align(dev
, hmp
->rx_buf_sz
);
1130 hmp
->rx_skbuff
[i
] = skb
;
1134 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1135 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1136 hmp
->rx_ring
[i
].status_n_length
= cpu_to_le32(DescOwn
|
1137 DescEndPacket
| DescIntr
| (hmp
->rx_buf_sz
- 2));
1139 hmp
->dirty_rx
= (unsigned int)(i
- RX_RING_SIZE
);
1140 /* Mark the last entry as wrapping the ring. */
1141 hmp
->rx_ring
[RX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1143 /* Trigger an immediate transmit demand. */
1144 netif_trans_update(dev
); /* prevent tx timeout */
1145 dev
->stats
.tx_errors
++;
1147 /* Restart the chip's Tx/Rx processes . */
1148 writew(0x0002, ioaddr
+ TxCmd
); /* STOP Tx */
1149 writew(0x0001, ioaddr
+ TxCmd
); /* START Tx */
1150 writew(0x0001, ioaddr
+ RxCmd
); /* START Rx */
1152 netif_wake_queue(dev
);
1156 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1157 static void hamachi_init_ring(struct net_device
*dev
)
1159 struct hamachi_private
*hmp
= netdev_priv(dev
);
1163 hmp
->cur_rx
= hmp
->cur_tx
= 0;
1164 hmp
->dirty_rx
= hmp
->dirty_tx
= 0;
1166 /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1167 * card needs room to do 8 byte alignment, +2 so we can reserve
1168 * the first 2 bytes, and +16 gets room for the status word from the
1171 hmp
->rx_buf_sz
= (dev
->mtu
<= 1492 ? PKT_BUF_SZ
:
1172 (((dev
->mtu
+26+7) & ~7) + 16));
1174 /* Initialize all Rx descriptors. */
1175 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1176 hmp
->rx_ring
[i
].status_n_length
= 0;
1177 hmp
->rx_skbuff
[i
] = NULL
;
1179 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
1180 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1181 struct sk_buff
*skb
= netdev_alloc_skb(dev
, hmp
->rx_buf_sz
+ 2);
1182 hmp
->rx_skbuff
[i
] = skb
;
1185 skb_reserve(skb
, 2); /* 16 byte align the IP header. */
1186 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1187 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1188 /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
1189 hmp
->rx_ring
[i
].status_n_length
= cpu_to_le32(DescOwn
|
1190 DescEndPacket
| DescIntr
| (hmp
->rx_buf_sz
-2));
1192 hmp
->dirty_rx
= (unsigned int)(i
- RX_RING_SIZE
);
1193 hmp
->rx_ring
[RX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1195 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
1196 hmp
->tx_skbuff
[i
] = NULL
;
1197 hmp
->tx_ring
[i
].status_n_length
= 0;
1199 /* Mark the last entry of the ring */
1200 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|= cpu_to_le32(DescEndRing
);
1204 static netdev_tx_t
hamachi_start_xmit(struct sk_buff
*skb
,
1205 struct net_device
*dev
)
1207 struct hamachi_private
*hmp
= netdev_priv(dev
);
1211 /* Ok, now make sure that the queue has space before trying to
1212 add another skbuff. if we return non-zero the scheduler
1213 should interpret this as a queue full and requeue the buffer
1217 /* We should NEVER reach this point -KDU */
1218 printk(KERN_WARNING
"%s: Hamachi transmit queue full at slot %d.\n",dev
->name
, hmp
->cur_tx
);
1220 /* Wake the potentially-idle transmit channel. */
1221 /* If we don't need to read status, DON'T -KDU */
1222 status
=readw(hmp
->base
+ TxStatus
);
1223 if( !(status
& 0x0001) || (status
& 0x0002))
1224 writew(0x0001, hmp
->base
+ TxCmd
);
1225 return NETDEV_TX_BUSY
;
1228 /* Caution: the write order is important here, set the field
1229 with the "ownership" bits last. */
1231 /* Calculate the next Tx descriptor entry. */
1232 entry
= hmp
->cur_tx
% TX_RING_SIZE
;
1234 hmp
->tx_skbuff
[entry
] = skb
;
1236 hmp
->tx_ring
[entry
].addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1237 skb
->data
, skb
->len
, PCI_DMA_TODEVICE
));
1239 /* Hmmmm, could probably put a DescIntr on these, but the way
1240 the driver is currently coded makes Tx interrupts unnecessary
1241 since the clearing of the Tx ring is handled by the start_xmit
1242 routine. This organization helps mitigate the interrupts a
1243 bit and probably renders the max_tx_latency param useless.
1245 Update: Putting a DescIntr bit on all of the descriptors and
1246 mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
1248 if (entry
>= TX_RING_SIZE
-1) /* Wrap ring */
1249 hmp
->tx_ring
[entry
].status_n_length
= cpu_to_le32(DescOwn
|
1250 DescEndPacket
| DescEndRing
| DescIntr
| skb
->len
);
1252 hmp
->tx_ring
[entry
].status_n_length
= cpu_to_le32(DescOwn
|
1253 DescEndPacket
| DescIntr
| skb
->len
);
1256 /* Non-x86 Todo: explicitly flush cache lines here. */
1258 /* Wake the potentially-idle transmit channel. */
1259 /* If we don't need to read status, DON'T -KDU */
1260 status
=readw(hmp
->base
+ TxStatus
);
1261 if( !(status
& 0x0001) || (status
& 0x0002))
1262 writew(0x0001, hmp
->base
+ TxCmd
);
1264 /* Immediately before returning, let's clear as many entries as we can. */
1267 /* We should kick the bottom half here, since we are not accepting
1268 * interrupts with every packet. i.e. realize that Gigabit ethernet
1269 * can transmit faster than ordinary machines can load packets;
1270 * hence, any packet that got put off because we were in the transmit
1271 * routine should IMMEDIATELY get a chance to be re-queued. -KDU
1273 if ((hmp
->cur_tx
- hmp
->dirty_tx
) < (TX_RING_SIZE
- 4))
1274 netif_wake_queue(dev
); /* Typical path */
1277 netif_stop_queue(dev
);
1280 if (hamachi_debug
> 4) {
1281 printk(KERN_DEBUG
"%s: Hamachi transmit frame #%d queued in slot %d.\n",
1282 dev
->name
, hmp
->cur_tx
, entry
);
1284 return NETDEV_TX_OK
;
1287 /* The interrupt handler does all of the Rx thread work and cleans up
1288 after the Tx thread. */
1289 static irqreturn_t
hamachi_interrupt(int irq
, void *dev_instance
)
1291 struct net_device
*dev
= dev_instance
;
1292 struct hamachi_private
*hmp
= netdev_priv(dev
);
1293 void __iomem
*ioaddr
= hmp
->base
;
1294 long boguscnt
= max_interrupt_work
;
1297 #ifndef final_version /* Can never occur. */
1299 printk (KERN_ERR
"hamachi_interrupt(): irq %d for unknown device.\n", irq
);
1304 spin_lock(&hmp
->lock
);
1307 u32 intr_status
= readl(ioaddr
+ InterruptClear
);
1309 if (hamachi_debug
> 4)
1310 printk(KERN_DEBUG
"%s: Hamachi interrupt, status %4.4x.\n",
1311 dev
->name
, intr_status
);
1313 if (intr_status
== 0)
1318 if (intr_status
& IntrRxDone
)
1321 if (intr_status
& IntrTxDone
){
1322 /* This code should RARELY need to execute. After all, this is
1323 * a gigabit link, it should consume packets as fast as we put
1324 * them in AND we clear the Tx ring in hamachi_start_xmit().
1327 for (; hmp
->cur_tx
- hmp
->dirty_tx
> 0; hmp
->dirty_tx
++){
1328 int entry
= hmp
->dirty_tx
% TX_RING_SIZE
;
1329 struct sk_buff
*skb
;
1331 if (hmp
->tx_ring
[entry
].status_n_length
& cpu_to_le32(DescOwn
))
1333 skb
= hmp
->tx_skbuff
[entry
];
1334 /* Free the original skb. */
1336 pci_unmap_single(hmp
->pci_dev
,
1337 leXX_to_cpu(hmp
->tx_ring
[entry
].addr
),
1340 dev_kfree_skb_irq(skb
);
1341 hmp
->tx_skbuff
[entry
] = NULL
;
1343 hmp
->tx_ring
[entry
].status_n_length
= 0;
1344 if (entry
>= TX_RING_SIZE
-1)
1345 hmp
->tx_ring
[TX_RING_SIZE
-1].status_n_length
|=
1346 cpu_to_le32(DescEndRing
);
1347 dev
->stats
.tx_packets
++;
1349 if (hmp
->cur_tx
- hmp
->dirty_tx
< TX_RING_SIZE
- 4){
1350 /* The ring is no longer full */
1352 netif_wake_queue(dev
);
1355 netif_wake_queue(dev
);
1360 /* Abnormal error summary/uncommon events handlers. */
1362 (IntrTxPCIFault
| IntrTxPCIErr
| IntrRxPCIFault
| IntrRxPCIErr
|
1363 LinkChange
| NegotiationChange
| StatsMax
))
1364 hamachi_error(dev
, intr_status
);
1366 if (--boguscnt
< 0) {
1367 printk(KERN_WARNING
"%s: Too much work at interrupt, status=0x%4.4x.\n",
1368 dev
->name
, intr_status
);
1373 if (hamachi_debug
> 3)
1374 printk(KERN_DEBUG
"%s: exiting interrupt, status=%#4.4x.\n",
1375 dev
->name
, readl(ioaddr
+ IntrStatus
));
1377 #ifndef final_version
1378 /* Code that should never be run! Perhaps remove after testing.. */
1380 static int stopit
= 10;
1381 if (dev
->start
== 0 && --stopit
< 0) {
1382 printk(KERN_ERR
"%s: Emergency stop, looping startup interrupt.\n",
1389 spin_unlock(&hmp
->lock
);
1390 return IRQ_RETVAL(handled
);
1393 /* This routine is logically part of the interrupt handler, but separated
1394 for clarity and better register allocation. */
1395 static int hamachi_rx(struct net_device
*dev
)
1397 struct hamachi_private
*hmp
= netdev_priv(dev
);
1398 int entry
= hmp
->cur_rx
% RX_RING_SIZE
;
1399 int boguscnt
= (hmp
->dirty_rx
+ RX_RING_SIZE
) - hmp
->cur_rx
;
1401 if (hamachi_debug
> 4) {
1402 printk(KERN_DEBUG
" In hamachi_rx(), entry %d status %4.4x.\n",
1403 entry
, hmp
->rx_ring
[entry
].status_n_length
);
1406 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1408 struct hamachi_desc
*desc
= &(hmp
->rx_ring
[entry
]);
1409 u32 desc_status
= le32_to_cpu(desc
->status_n_length
);
1410 u16 data_size
= desc_status
; /* Implicit truncate */
1414 if (desc_status
& DescOwn
)
1416 pci_dma_sync_single_for_cpu(hmp
->pci_dev
,
1417 leXX_to_cpu(desc
->addr
),
1419 PCI_DMA_FROMDEVICE
);
1420 buf_addr
= (u8
*) hmp
->rx_skbuff
[entry
]->data
;
1421 frame_status
= get_unaligned_le32(&(buf_addr
[data_size
- 12]));
1422 if (hamachi_debug
> 4)
1423 printk(KERN_DEBUG
" hamachi_rx() status was %8.8x.\n",
1427 if ( ! (desc_status
& DescEndPacket
)) {
1428 printk(KERN_WARNING
"%s: Oversized Ethernet frame spanned "
1429 "multiple buffers, entry %#x length %d status %4.4x!\n",
1430 dev
->name
, hmp
->cur_rx
, data_size
, desc_status
);
1431 printk(KERN_WARNING
"%s: Oversized Ethernet frame %p vs %p.\n",
1432 dev
->name
, desc
, &hmp
->rx_ring
[hmp
->cur_rx
% RX_RING_SIZE
]);
1433 printk(KERN_WARNING
"%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
1435 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
+1) % RX_RING_SIZE
].status_n_length
) & 0xffff0000,
1436 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
+1) % RX_RING_SIZE
].status_n_length
) & 0x0000ffff,
1437 le32_to_cpu(hmp
->rx_ring
[(hmp
->cur_rx
-1) % RX_RING_SIZE
].status_n_length
));
1438 dev
->stats
.rx_length_errors
++;
1439 } /* else Omit for prototype errata??? */
1440 if (frame_status
& 0x00380000) {
1441 /* There was an error. */
1442 if (hamachi_debug
> 2)
1443 printk(KERN_DEBUG
" hamachi_rx() Rx error was %8.8x.\n",
1445 dev
->stats
.rx_errors
++;
1446 if (frame_status
& 0x00600000)
1447 dev
->stats
.rx_length_errors
++;
1448 if (frame_status
& 0x00080000)
1449 dev
->stats
.rx_frame_errors
++;
1450 if (frame_status
& 0x00100000)
1451 dev
->stats
.rx_crc_errors
++;
1452 if (frame_status
< 0)
1453 dev
->stats
.rx_dropped
++;
1455 struct sk_buff
*skb
;
1457 u16 pkt_len
= (frame_status
& 0x07ff) - 4;
1459 u32 pfck
= *(u32
*) &buf_addr
[data_size
- 8];
1463 #ifndef final_version
1464 if (hamachi_debug
> 4)
1465 printk(KERN_DEBUG
" hamachi_rx() normal Rx pkt length %d"
1466 " of %d, bogus_cnt %d.\n",
1467 pkt_len
, data_size
, boguscnt
);
1468 if (hamachi_debug
> 5)
1469 printk(KERN_DEBUG
"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
1471 *(s32
*)&(buf_addr
[data_size
- 20]),
1472 *(s32
*)&(buf_addr
[data_size
- 16]),
1473 *(s32
*)&(buf_addr
[data_size
- 12]),
1474 *(s32
*)&(buf_addr
[data_size
- 8]),
1475 *(s32
*)&(buf_addr
[data_size
- 4]));
1477 /* Check if the packet is long enough to accept without copying
1478 to a minimally-sized skbuff. */
1479 if (pkt_len
< rx_copybreak
&&
1480 (skb
= netdev_alloc_skb(dev
, pkt_len
+ 2)) != NULL
) {
1482 printk(KERN_ERR
"%s: rx_copybreak non-zero "
1483 "not good with RX_CHECKSUM\n", dev
->name
);
1485 skb_reserve(skb
, 2); /* 16 byte align the IP header */
1486 pci_dma_sync_single_for_cpu(hmp
->pci_dev
,
1487 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1489 PCI_DMA_FROMDEVICE
);
1490 /* Call copy + cksum if available. */
1491 #if 1 || USE_IP_COPYSUM
1492 skb_copy_to_linear_data(skb
,
1493 hmp
->rx_skbuff
[entry
]->data
, pkt_len
);
1494 skb_put(skb
, pkt_len
);
1496 skb_put_data(skb
, hmp
->rx_ring_dma
1497 + entry
*sizeof(*desc
), pkt_len
);
1499 pci_dma_sync_single_for_device(hmp
->pci_dev
,
1500 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1502 PCI_DMA_FROMDEVICE
);
1504 pci_unmap_single(hmp
->pci_dev
,
1505 leXX_to_cpu(hmp
->rx_ring
[entry
].addr
),
1506 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1507 skb_put(skb
= hmp
->rx_skbuff
[entry
], pkt_len
);
1508 hmp
->rx_skbuff
[entry
] = NULL
;
1510 skb
->protocol
= eth_type_trans(skb
, dev
);
1514 /* TCP or UDP on ipv4, DIX encoding */
1515 if (pfck
>>24 == 0x91 || pfck
>>24 == 0x51) {
1516 struct iphdr
*ih
= (struct iphdr
*) skb
->data
;
1517 /* Check that IP packet is at least 46 bytes, otherwise,
1518 * there may be pad bytes included in the hardware checksum.
1519 * This wouldn't happen if everyone padded with 0.
1521 if (ntohs(ih
->tot_len
) >= 46){
1522 /* don't worry about frags */
1523 if (!(ih
->frag_off
& cpu_to_be16(IP_MF
|IP_OFFSET
))) {
1524 u32 inv
= *(u32
*) &buf_addr
[data_size
- 16];
1525 u32
*p
= (u32
*) &buf_addr
[data_size
- 20];
1526 register u32 crc
, p_r
, p_r1
;
1536 crc
= (p_r
& 0xffff) + (p_r
>> 16);
1539 crc
= (p_r
>> 16) + (p_r
& 0xffff)
1540 + (p_r1
>> 16 & 0xff00);
1543 crc
= p_r
+ (p_r1
>> 16);
1546 crc
= p_r
+ (p_r1
& 0xff00) + (p_r1
>> 16);
1548 default: /*NOTREACHED*/ crc
= 0;
1550 if (crc
& 0xffff0000) {
1554 /* tcp/udp will add in pseudo */
1555 skb
->csum
= ntohs(pfck
& 0xffff);
1556 if (skb
->csum
> crc
)
1559 skb
->csum
+= (~crc
& 0xffff);
1561 * could do the pseudo myself and return
1562 * CHECKSUM_UNNECESSARY
1564 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1568 #endif /* RX_CHECKSUM */
1571 dev
->stats
.rx_packets
++;
1573 entry
= (++hmp
->cur_rx
) % RX_RING_SIZE
;
1576 /* Refill the Rx ring buffers. */
1577 for (; hmp
->cur_rx
- hmp
->dirty_rx
> 0; hmp
->dirty_rx
++) {
1578 struct hamachi_desc
*desc
;
1580 entry
= hmp
->dirty_rx
% RX_RING_SIZE
;
1581 desc
= &(hmp
->rx_ring
[entry
]);
1582 if (hmp
->rx_skbuff
[entry
] == NULL
) {
1583 struct sk_buff
*skb
= netdev_alloc_skb(dev
, hmp
->rx_buf_sz
+ 2);
1585 hmp
->rx_skbuff
[entry
] = skb
;
1587 break; /* Better luck next round. */
1588 skb_reserve(skb
, 2); /* Align IP on 16 byte boundaries */
1589 desc
->addr
= cpu_to_leXX(pci_map_single(hmp
->pci_dev
,
1590 skb
->data
, hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
));
1592 desc
->status_n_length
= cpu_to_le32(hmp
->rx_buf_sz
);
1593 if (entry
>= RX_RING_SIZE
-1)
1594 desc
->status_n_length
|= cpu_to_le32(DescOwn
|
1595 DescEndPacket
| DescEndRing
| DescIntr
);
1597 desc
->status_n_length
|= cpu_to_le32(DescOwn
|
1598 DescEndPacket
| DescIntr
);
1601 /* Restart Rx engine if stopped. */
1602 /* If we don't need to check status, don't. -KDU */
1603 if (readw(hmp
->base
+ RxStatus
) & 0x0002)
1604 writew(0x0001, hmp
->base
+ RxCmd
);
1609 /* This is more properly named "uncommon interrupt events", as it covers more
1610 than just errors. */
1611 static void hamachi_error(struct net_device
*dev
, int intr_status
)
1613 struct hamachi_private
*hmp
= netdev_priv(dev
);
1614 void __iomem
*ioaddr
= hmp
->base
;
1616 if (intr_status
& (LinkChange
|NegotiationChange
)) {
1617 if (hamachi_debug
> 1)
1618 printk(KERN_INFO
"%s: Link changed: AutoNegotiation Ctrl"
1619 " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
1620 dev
->name
, readw(ioaddr
+ 0x0E0), readw(ioaddr
+ 0x0E2),
1621 readw(ioaddr
+ ANLinkPartnerAbility
),
1622 readl(ioaddr
+ IntrStatus
));
1623 if (readw(ioaddr
+ ANStatus
) & 0x20)
1624 writeb(0x01, ioaddr
+ LEDCtrl
);
1626 writeb(0x03, ioaddr
+ LEDCtrl
);
1628 if (intr_status
& StatsMax
) {
1629 hamachi_get_stats(dev
);
1630 /* Read the overflow bits to clear. */
1631 readl(ioaddr
+ 0x370);
1632 readl(ioaddr
+ 0x3F0);
1634 if ((intr_status
& ~(LinkChange
|StatsMax
|NegotiationChange
|IntrRxDone
|IntrTxDone
)) &&
1636 printk(KERN_ERR
"%s: Something Wicked happened! %4.4x.\n",
1637 dev
->name
, intr_status
);
1638 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1639 if (intr_status
& (IntrTxPCIErr
| IntrTxPCIFault
))
1640 dev
->stats
.tx_fifo_errors
++;
1641 if (intr_status
& (IntrRxPCIErr
| IntrRxPCIFault
))
1642 dev
->stats
.rx_fifo_errors
++;
1645 static int hamachi_close(struct net_device
*dev
)
1647 struct hamachi_private
*hmp
= netdev_priv(dev
);
1648 void __iomem
*ioaddr
= hmp
->base
;
1649 struct sk_buff
*skb
;
1652 netif_stop_queue(dev
);
1654 if (hamachi_debug
> 1) {
1655 printk(KERN_DEBUG
"%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
1656 dev
->name
, readw(ioaddr
+ TxStatus
),
1657 readw(ioaddr
+ RxStatus
), readl(ioaddr
+ IntrStatus
));
1658 printk(KERN_DEBUG
"%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1659 dev
->name
, hmp
->cur_tx
, hmp
->dirty_tx
, hmp
->cur_rx
, hmp
->dirty_rx
);
1662 /* Disable interrupts by clearing the interrupt mask. */
1663 writel(0x0000, ioaddr
+ InterruptEnable
);
1665 /* Stop the chip's Tx and Rx processes. */
1666 writel(2, ioaddr
+ RxCmd
);
1667 writew(2, ioaddr
+ TxCmd
);
1670 if (hamachi_debug
> 2) {
1671 printk(KERN_DEBUG
" Tx ring at %8.8x:\n",
1672 (int)hmp
->tx_ring_dma
);
1673 for (i
= 0; i
< TX_RING_SIZE
; i
++)
1674 printk(KERN_DEBUG
" %c #%d desc. %8.8x %8.8x.\n",
1675 readl(ioaddr
+ TxCurPtr
) == (long)&hmp
->tx_ring
[i
] ? '>' : ' ',
1676 i
, hmp
->tx_ring
[i
].status_n_length
, hmp
->tx_ring
[i
].addr
);
1677 printk(KERN_DEBUG
" Rx ring %8.8x:\n",
1678 (int)hmp
->rx_ring_dma
);
1679 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1680 printk(KERN_DEBUG
" %c #%d desc. %4.4x %8.8x\n",
1681 readl(ioaddr
+ RxCurPtr
) == (long)&hmp
->rx_ring
[i
] ? '>' : ' ',
1682 i
, hmp
->rx_ring
[i
].status_n_length
, hmp
->rx_ring
[i
].addr
);
1683 if (hamachi_debug
> 6) {
1684 if (*(u8
*)hmp
->rx_skbuff
[i
]->data
!= 0x69) {
1686 hmp
->rx_skbuff
[i
]->data
;
1688 printk(KERN_DEBUG
"Addr: ");
1689 for (j
= 0; j
< 0x50; j
++)
1690 printk(" %4.4x", addr
[j
]);
1696 #endif /* __i386__ debugging only */
1698 free_irq(hmp
->pci_dev
->irq
, dev
);
1700 del_timer_sync(&hmp
->timer
);
1702 /* Free all the skbuffs in the Rx queue. */
1703 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1704 skb
= hmp
->rx_skbuff
[i
];
1705 hmp
->rx_ring
[i
].status_n_length
= 0;
1707 pci_unmap_single(hmp
->pci_dev
,
1708 leXX_to_cpu(hmp
->rx_ring
[i
].addr
),
1709 hmp
->rx_buf_sz
, PCI_DMA_FROMDEVICE
);
1711 hmp
->rx_skbuff
[i
] = NULL
;
1713 hmp
->rx_ring
[i
].addr
= cpu_to_leXX(0xBADF00D0); /* An invalid address. */
1715 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
1716 skb
= hmp
->tx_skbuff
[i
];
1718 pci_unmap_single(hmp
->pci_dev
,
1719 leXX_to_cpu(hmp
->tx_ring
[i
].addr
),
1720 skb
->len
, PCI_DMA_TODEVICE
);
1722 hmp
->tx_skbuff
[i
] = NULL
;
1726 writeb(0x00, ioaddr
+ LEDCtrl
);
1731 static struct net_device_stats
*hamachi_get_stats(struct net_device
*dev
)
1733 struct hamachi_private
*hmp
= netdev_priv(dev
);
1734 void __iomem
*ioaddr
= hmp
->base
;
1736 /* We should lock this segment of code for SMP eventually, although
1737 the vulnerability window is very small and statistics are
1739 /* Ok, what goes here? This appears to be stuck at 21 packets
1740 according to ifconfig. It does get incremented in hamachi_tx(),
1741 so I think I'll comment it out here and see if better things
1744 /* dev->stats.tx_packets = readl(ioaddr + 0x000); */
1746 /* Total Uni+Brd+Multi */
1747 dev
->stats
.rx_bytes
= readl(ioaddr
+ 0x330);
1748 /* Total Uni+Brd+Multi */
1749 dev
->stats
.tx_bytes
= readl(ioaddr
+ 0x3B0);
1751 dev
->stats
.multicast
= readl(ioaddr
+ 0x320);
1753 /* Over+Undersized */
1754 dev
->stats
.rx_length_errors
= readl(ioaddr
+ 0x368);
1756 dev
->stats
.rx_over_errors
= readl(ioaddr
+ 0x35C);
1758 dev
->stats
.rx_crc_errors
= readl(ioaddr
+ 0x360);
1760 dev
->stats
.rx_frame_errors
= readl(ioaddr
+ 0x364);
1762 dev
->stats
.rx_missed_errors
= readl(ioaddr
+ 0x36C);
1767 static void set_rx_mode(struct net_device
*dev
)
1769 struct hamachi_private
*hmp
= netdev_priv(dev
);
1770 void __iomem
*ioaddr
= hmp
->base
;
1772 if (dev
->flags
& IFF_PROMISC
) { /* Set promiscuous. */
1773 writew(0x000F, ioaddr
+ AddrMode
);
1774 } else if ((netdev_mc_count(dev
) > 63) || (dev
->flags
& IFF_ALLMULTI
)) {
1775 /* Too many to match, or accept all multicasts. */
1776 writew(0x000B, ioaddr
+ AddrMode
);
1777 } else if (!netdev_mc_empty(dev
)) { /* Must use the CAM filter. */
1778 struct netdev_hw_addr
*ha
;
1781 netdev_for_each_mc_addr(ha
, dev
) {
1782 writel(*(u32
*)(ha
->addr
), ioaddr
+ 0x100 + i
*8);
1783 writel(0x20000 | (*(u16
*)&ha
->addr
[4]),
1784 ioaddr
+ 0x104 + i
*8);
1787 /* Clear remaining entries. */
1789 writel(0, ioaddr
+ 0x104 + i
*8);
1790 writew(0x0003, ioaddr
+ AddrMode
);
1791 } else { /* Normal, unicast/broadcast-only mode. */
1792 writew(0x0001, ioaddr
+ AddrMode
);
1796 static int check_if_running(struct net_device
*dev
)
1798 if (!netif_running(dev
))
1803 static void hamachi_get_drvinfo(struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1805 struct hamachi_private
*np
= netdev_priv(dev
);
1807 strlcpy(info
->driver
, DRV_NAME
, sizeof(info
->driver
));
1808 strlcpy(info
->version
, DRV_VERSION
, sizeof(info
->version
));
1809 strlcpy(info
->bus_info
, pci_name(np
->pci_dev
), sizeof(info
->bus_info
));
1812 static int hamachi_get_link_ksettings(struct net_device
*dev
,
1813 struct ethtool_link_ksettings
*cmd
)
1815 struct hamachi_private
*np
= netdev_priv(dev
);
1816 spin_lock_irq(&np
->lock
);
1817 mii_ethtool_get_link_ksettings(&np
->mii_if
, cmd
);
1818 spin_unlock_irq(&np
->lock
);
1822 static int hamachi_set_link_ksettings(struct net_device
*dev
,
1823 const struct ethtool_link_ksettings
*cmd
)
1825 struct hamachi_private
*np
= netdev_priv(dev
);
1827 spin_lock_irq(&np
->lock
);
1828 res
= mii_ethtool_set_link_ksettings(&np
->mii_if
, cmd
);
1829 spin_unlock_irq(&np
->lock
);
1833 static int hamachi_nway_reset(struct net_device
*dev
)
1835 struct hamachi_private
*np
= netdev_priv(dev
);
1836 return mii_nway_restart(&np
->mii_if
);
1839 static u32
hamachi_get_link(struct net_device
*dev
)
1841 struct hamachi_private
*np
= netdev_priv(dev
);
1842 return mii_link_ok(&np
->mii_if
);
1845 static const struct ethtool_ops ethtool_ops
= {
1846 .begin
= check_if_running
,
1847 .get_drvinfo
= hamachi_get_drvinfo
,
1848 .nway_reset
= hamachi_nway_reset
,
1849 .get_link
= hamachi_get_link
,
1850 .get_link_ksettings
= hamachi_get_link_ksettings
,
1851 .set_link_ksettings
= hamachi_set_link_ksettings
,
1854 static const struct ethtool_ops ethtool_ops_no_mii
= {
1855 .begin
= check_if_running
,
1856 .get_drvinfo
= hamachi_get_drvinfo
,
1859 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1861 struct hamachi_private
*np
= netdev_priv(dev
);
1862 struct mii_ioctl_data
*data
= if_mii(rq
);
1865 if (!netif_running(dev
))
1868 if (cmd
== (SIOCDEVPRIVATE
+3)) { /* set rx,tx intr params */
1869 u32
*d
= (u32
*)&rq
->ifr_ifru
;
1870 /* Should add this check here or an ordinary user can do nasty
1873 * TODO: Shut down the Rx and Tx engines while doing this.
1875 if (!capable(CAP_NET_ADMIN
))
1877 writel(d
[0], np
->base
+ TxIntrCtrl
);
1878 writel(d
[1], np
->base
+ RxIntrCtrl
);
1879 printk(KERN_NOTICE
"%s: tx %08x, rx %08x intr\n", dev
->name
,
1880 (u32
) readl(np
->base
+ TxIntrCtrl
),
1881 (u32
) readl(np
->base
+ RxIntrCtrl
));
1886 spin_lock_irq(&np
->lock
);
1887 rc
= generic_mii_ioctl(&np
->mii_if
, data
, cmd
, NULL
);
1888 spin_unlock_irq(&np
->lock
);
1895 static void hamachi_remove_one(struct pci_dev
*pdev
)
1897 struct net_device
*dev
= pci_get_drvdata(pdev
);
1900 struct hamachi_private
*hmp
= netdev_priv(dev
);
1902 pci_free_consistent(pdev
, RX_TOTAL_SIZE
, hmp
->rx_ring
,
1904 pci_free_consistent(pdev
, TX_TOTAL_SIZE
, hmp
->tx_ring
,
1906 unregister_netdev(dev
);
1909 pci_release_regions(pdev
);
1913 static const struct pci_device_id hamachi_pci_tbl
[] = {
1914 { 0x1318, 0x0911, PCI_ANY_ID
, PCI_ANY_ID
, },
1917 MODULE_DEVICE_TABLE(pci
, hamachi_pci_tbl
);
1919 static struct pci_driver hamachi_driver
= {
1921 .id_table
= hamachi_pci_tbl
,
1922 .probe
= hamachi_init_one
,
1923 .remove
= hamachi_remove_one
,
1926 static int __init
hamachi_init (void)
1928 /* when a module, this is printed whether or not devices are found in probe */
1932 return pci_register_driver(&hamachi_driver
);
1935 static void __exit
hamachi_exit (void)
1937 pci_unregister_driver(&hamachi_driver
);
1941 module_init(hamachi_init
);
1942 module_exit(hamachi_exit
);