xen: netback: use __CONST_RING_SIZE not __RING_SIZE
[pandora-kernel.git] / drivers / net / pcnet32.c
1 /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
2 /*
3  *      Copyright 1996-1999 Thomas Bogendoerfer
4  *
5  *      Derived from the lance driver written 1993,1994,1995 by Donald Becker.
6  *
7  *      Copyright 1993 United States Government as represented by the
8  *      Director, National Security Agency.
9  *
10  *      This software may be used and distributed according to the terms
11  *      of the GNU General Public License, incorporated herein by reference.
12  *
13  *      This driver is for PCnet32 and PCnetPCI based ethercards
14  */
15 /**************************************************************************
16  *  23 Oct, 2000.
17  *  Fixed a few bugs, related to running the controller in 32bit mode.
18  *
19  *  Carsten Langgaard, carstenl@mips.com
20  *  Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
21  *
22  *************************************************************************/
23
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
26 #define DRV_NAME        "pcnet32"
27 #define DRV_VERSION     "1.35"
28 #define DRV_RELDATE     "21.Apr.2008"
29 #define PFX             DRV_NAME ": "
30
31 static const char *const version =
32     DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " tsbogend@alpha.franken.de\n";
33
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/sched.h>
37 #include <linux/string.h>
38 #include <linux/errno.h>
39 #include <linux/ioport.h>
40 #include <linux/slab.h>
41 #include <linux/interrupt.h>
42 #include <linux/pci.h>
43 #include <linux/delay.h>
44 #include <linux/init.h>
45 #include <linux/ethtool.h>
46 #include <linux/mii.h>
47 #include <linux/crc32.h>
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/if_ether.h>
51 #include <linux/skbuff.h>
52 #include <linux/spinlock.h>
53 #include <linux/moduleparam.h>
54 #include <linux/bitops.h>
55 #include <linux/io.h>
56 #include <linux/uaccess.h>
57
58 #include <asm/dma.h>
59 #include <asm/irq.h>
60
61 /*
62  * PCI device identifiers for "new style" Linux PCI Device Drivers
63  */
64 static DEFINE_PCI_DEVICE_TABLE(pcnet32_pci_tbl) = {
65         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME), },
66         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE), },
67
68         /*
69          * Adapters that were sold with IBM's RS/6000 or pSeries hardware have
70          * the incorrect vendor id.
71          */
72         { PCI_DEVICE(PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_AMD_LANCE),
73           .class = (PCI_CLASS_NETWORK_ETHERNET << 8), .class_mask = 0xffff00, },
74
75         { }     /* terminate list */
76 };
77
78 MODULE_DEVICE_TABLE(pci, pcnet32_pci_tbl);
79
80 static int cards_found;
81
82 /*
83  * VLB I/O addresses
84  */
85 static unsigned int pcnet32_portlist[] __initdata =
86     { 0x300, 0x320, 0x340, 0x360, 0 };
87
88 static int pcnet32_debug;
89 static int tx_start = 1;        /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
90 static int pcnet32vlb;          /* check for VLB cards ? */
91
92 static struct net_device *pcnet32_dev;
93
94 static int max_interrupt_work = 2;
95 static int rx_copybreak = 200;
96
97 #define PCNET32_PORT_AUI      0x00
98 #define PCNET32_PORT_10BT     0x01
99 #define PCNET32_PORT_GPSI     0x02
100 #define PCNET32_PORT_MII      0x03
101
102 #define PCNET32_PORT_PORTSEL  0x03
103 #define PCNET32_PORT_ASEL     0x04
104 #define PCNET32_PORT_100      0x40
105 #define PCNET32_PORT_FD       0x80
106
107 #define PCNET32_DMA_MASK 0xffffffff
108
109 #define PCNET32_WATCHDOG_TIMEOUT (jiffies + (2 * HZ))
110 #define PCNET32_BLINK_TIMEOUT   (jiffies + (HZ/4))
111
112 /*
113  * table to translate option values from tulip
114  * to internal options
115  */
116 static const unsigned char options_mapping[] = {
117         PCNET32_PORT_ASEL,                      /*  0 Auto-select      */
118         PCNET32_PORT_AUI,                       /*  1 BNC/AUI          */
119         PCNET32_PORT_AUI,                       /*  2 AUI/BNC          */
120         PCNET32_PORT_ASEL,                      /*  3 not supported    */
121         PCNET32_PORT_10BT | PCNET32_PORT_FD,    /*  4 10baseT-FD       */
122         PCNET32_PORT_ASEL,                      /*  5 not supported    */
123         PCNET32_PORT_ASEL,                      /*  6 not supported    */
124         PCNET32_PORT_ASEL,                      /*  7 not supported    */
125         PCNET32_PORT_ASEL,                      /*  8 not supported    */
126         PCNET32_PORT_MII,                       /*  9 MII 10baseT      */
127         PCNET32_PORT_MII | PCNET32_PORT_FD,     /* 10 MII 10baseT-FD   */
128         PCNET32_PORT_MII,                       /* 11 MII (autosel)    */
129         PCNET32_PORT_10BT,                      /* 12 10BaseT          */
130         PCNET32_PORT_MII | PCNET32_PORT_100,    /* 13 MII 100BaseTx    */
131                                                 /* 14 MII 100BaseTx-FD */
132         PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD,
133         PCNET32_PORT_ASEL                       /* 15 not supported    */
134 };
135
136 static const char pcnet32_gstrings_test[][ETH_GSTRING_LEN] = {
137         "Loopback test  (offline)"
138 };
139
140 #define PCNET32_TEST_LEN        ARRAY_SIZE(pcnet32_gstrings_test)
141
142 #define PCNET32_NUM_REGS 136
143
144 #define MAX_UNITS 8             /* More are supported, limit only on options */
145 static int options[MAX_UNITS];
146 static int full_duplex[MAX_UNITS];
147 static int homepna[MAX_UNITS];
148
149 /*
150  *                              Theory of Operation
151  *
152  * This driver uses the same software structure as the normal lance
153  * driver. So look for a verbose description in lance.c. The differences
154  * to the normal lance driver is the use of the 32bit mode of PCnet32
155  * and PCnetPCI chips. Because these chips are 32bit chips, there is no
156  * 16MB limitation and we don't need bounce buffers.
157  */
158
159 /*
160  * Set the number of Tx and Rx buffers, using Log_2(# buffers).
161  * Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
162  * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
163  */
164 #ifndef PCNET32_LOG_TX_BUFFERS
165 #define PCNET32_LOG_TX_BUFFERS          4
166 #define PCNET32_LOG_RX_BUFFERS          5
167 #define PCNET32_LOG_MAX_TX_BUFFERS      9       /* 2^9 == 512 */
168 #define PCNET32_LOG_MAX_RX_BUFFERS      9
169 #endif
170
171 #define TX_RING_SIZE            (1 << (PCNET32_LOG_TX_BUFFERS))
172 #define TX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_TX_BUFFERS))
173
174 #define RX_RING_SIZE            (1 << (PCNET32_LOG_RX_BUFFERS))
175 #define RX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_RX_BUFFERS))
176
177 #define PKT_BUF_SKB             1544
178 /* actual buffer length after being aligned */
179 #define PKT_BUF_SIZE            (PKT_BUF_SKB - NET_IP_ALIGN)
180 /* chip wants twos complement of the (aligned) buffer length */
181 #define NEG_BUF_SIZE            (NET_IP_ALIGN - PKT_BUF_SKB)
182
183 /* Offsets from base I/O address. */
184 #define PCNET32_WIO_RDP         0x10
185 #define PCNET32_WIO_RAP         0x12
186 #define PCNET32_WIO_RESET       0x14
187 #define PCNET32_WIO_BDP         0x16
188
189 #define PCNET32_DWIO_RDP        0x10
190 #define PCNET32_DWIO_RAP        0x14
191 #define PCNET32_DWIO_RESET      0x18
192 #define PCNET32_DWIO_BDP        0x1C
193
194 #define PCNET32_TOTAL_SIZE      0x20
195
196 #define CSR0            0
197 #define CSR0_INIT       0x1
198 #define CSR0_START      0x2
199 #define CSR0_STOP       0x4
200 #define CSR0_TXPOLL     0x8
201 #define CSR0_INTEN      0x40
202 #define CSR0_IDON       0x0100
203 #define CSR0_NORMAL     (CSR0_START | CSR0_INTEN)
204 #define PCNET32_INIT_LOW        1
205 #define PCNET32_INIT_HIGH       2
206 #define CSR3            3
207 #define CSR4            4
208 #define CSR5            5
209 #define CSR5_SUSPEND    0x0001
210 #define CSR15           15
211 #define PCNET32_MC_FILTER       8
212
213 #define PCNET32_79C970A 0x2621
214
215 /* The PCNET32 Rx and Tx ring descriptors. */
216 struct pcnet32_rx_head {
217         __le32  base;
218         __le16  buf_length;     /* two`s complement of length */
219         __le16  status;
220         __le32  msg_length;
221         __le32  reserved;
222 };
223
224 struct pcnet32_tx_head {
225         __le32  base;
226         __le16  length;         /* two`s complement of length */
227         __le16  status;
228         __le32  misc;
229         __le32  reserved;
230 };
231
232 /* The PCNET32 32-Bit initialization block, described in databook. */
233 struct pcnet32_init_block {
234         __le16  mode;
235         __le16  tlen_rlen;
236         u8      phys_addr[6];
237         __le16  reserved;
238         __le32  filter[2];
239         /* Receive and transmit ring base, along with extra bits. */
240         __le32  rx_ring;
241         __le32  tx_ring;
242 };
243
244 /* PCnet32 access functions */
245 struct pcnet32_access {
246         u16     (*read_csr) (unsigned long, int);
247         void    (*write_csr) (unsigned long, int, u16);
248         u16     (*read_bcr) (unsigned long, int);
249         void    (*write_bcr) (unsigned long, int, u16);
250         u16     (*read_rap) (unsigned long);
251         void    (*write_rap) (unsigned long, u16);
252         void    (*reset) (unsigned long);
253 };
254
255 /*
256  * The first field of pcnet32_private is read by the ethernet device
257  * so the structure should be allocated using pci_alloc_consistent().
258  */
259 struct pcnet32_private {
260         struct pcnet32_init_block *init_block;
261         /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
262         struct pcnet32_rx_head  *rx_ring;
263         struct pcnet32_tx_head  *tx_ring;
264         dma_addr_t              init_dma_addr;/* DMA address of beginning of the init block,
265                                    returned by pci_alloc_consistent */
266         struct pci_dev          *pci_dev;
267         const char              *name;
268         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
269         struct sk_buff          **tx_skbuff;
270         struct sk_buff          **rx_skbuff;
271         dma_addr_t              *tx_dma_addr;
272         dma_addr_t              *rx_dma_addr;
273         struct pcnet32_access   a;
274         spinlock_t              lock;           /* Guard lock */
275         unsigned int            cur_rx, cur_tx; /* The next free ring entry */
276         unsigned int            rx_ring_size;   /* current rx ring size */
277         unsigned int            tx_ring_size;   /* current tx ring size */
278         unsigned int            rx_mod_mask;    /* rx ring modular mask */
279         unsigned int            tx_mod_mask;    /* tx ring modular mask */
280         unsigned short          rx_len_bits;
281         unsigned short          tx_len_bits;
282         dma_addr_t              rx_ring_dma_addr;
283         dma_addr_t              tx_ring_dma_addr;
284         unsigned int            dirty_rx,       /* ring entries to be freed. */
285                                 dirty_tx;
286
287         struct net_device       *dev;
288         struct napi_struct      napi;
289         char                    tx_full;
290         char                    phycount;       /* number of phys found */
291         int                     options;
292         unsigned int            shared_irq:1,   /* shared irq possible */
293                                 dxsuflo:1,   /* disable transmit stop on uflo */
294                                 mii:1;          /* mii port available */
295         struct net_device       *next;
296         struct mii_if_info      mii_if;
297         struct timer_list       watchdog_timer;
298         u32                     msg_enable;     /* debug message level */
299
300         /* each bit indicates an available PHY */
301         u32                     phymask;
302         unsigned short          chip_version;   /* which variant this is */
303
304         /* saved registers during ethtool blink */
305         u16                     save_regs[4];
306 };
307
308 static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
309 static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
310 static int pcnet32_open(struct net_device *);
311 static int pcnet32_init_ring(struct net_device *);
312 static netdev_tx_t pcnet32_start_xmit(struct sk_buff *,
313                                       struct net_device *);
314 static void pcnet32_tx_timeout(struct net_device *dev);
315 static irqreturn_t pcnet32_interrupt(int, void *);
316 static int pcnet32_close(struct net_device *);
317 static struct net_device_stats *pcnet32_get_stats(struct net_device *);
318 static void pcnet32_load_multicast(struct net_device *dev);
319 static void pcnet32_set_multicast_list(struct net_device *);
320 static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
321 static void pcnet32_watchdog(struct net_device *);
322 static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
323 static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
324                        int val);
325 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
326 static void pcnet32_ethtool_test(struct net_device *dev,
327                                  struct ethtool_test *eth_test, u64 * data);
328 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
329 static int pcnet32_get_regs_len(struct net_device *dev);
330 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
331                              void *ptr);
332 static void pcnet32_purge_tx_ring(struct net_device *dev);
333 static int pcnet32_alloc_ring(struct net_device *dev, const char *name);
334 static void pcnet32_free_ring(struct net_device *dev);
335 static void pcnet32_check_media(struct net_device *dev, int verbose);
336
337 static u16 pcnet32_wio_read_csr(unsigned long addr, int index)
338 {
339         outw(index, addr + PCNET32_WIO_RAP);
340         return inw(addr + PCNET32_WIO_RDP);
341 }
342
343 static void pcnet32_wio_write_csr(unsigned long addr, int index, u16 val)
344 {
345         outw(index, addr + PCNET32_WIO_RAP);
346         outw(val, addr + PCNET32_WIO_RDP);
347 }
348
349 static u16 pcnet32_wio_read_bcr(unsigned long addr, int index)
350 {
351         outw(index, addr + PCNET32_WIO_RAP);
352         return inw(addr + PCNET32_WIO_BDP);
353 }
354
355 static void pcnet32_wio_write_bcr(unsigned long addr, int index, u16 val)
356 {
357         outw(index, addr + PCNET32_WIO_RAP);
358         outw(val, addr + PCNET32_WIO_BDP);
359 }
360
361 static u16 pcnet32_wio_read_rap(unsigned long addr)
362 {
363         return inw(addr + PCNET32_WIO_RAP);
364 }
365
366 static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
367 {
368         outw(val, addr + PCNET32_WIO_RAP);
369 }
370
371 static void pcnet32_wio_reset(unsigned long addr)
372 {
373         inw(addr + PCNET32_WIO_RESET);
374 }
375
376 static int pcnet32_wio_check(unsigned long addr)
377 {
378         outw(88, addr + PCNET32_WIO_RAP);
379         return inw(addr + PCNET32_WIO_RAP) == 88;
380 }
381
382 static struct pcnet32_access pcnet32_wio = {
383         .read_csr = pcnet32_wio_read_csr,
384         .write_csr = pcnet32_wio_write_csr,
385         .read_bcr = pcnet32_wio_read_bcr,
386         .write_bcr = pcnet32_wio_write_bcr,
387         .read_rap = pcnet32_wio_read_rap,
388         .write_rap = pcnet32_wio_write_rap,
389         .reset = pcnet32_wio_reset
390 };
391
392 static u16 pcnet32_dwio_read_csr(unsigned long addr, int index)
393 {
394         outl(index, addr + PCNET32_DWIO_RAP);
395         return inl(addr + PCNET32_DWIO_RDP) & 0xffff;
396 }
397
398 static void pcnet32_dwio_write_csr(unsigned long addr, int index, u16 val)
399 {
400         outl(index, addr + PCNET32_DWIO_RAP);
401         outl(val, addr + PCNET32_DWIO_RDP);
402 }
403
404 static u16 pcnet32_dwio_read_bcr(unsigned long addr, int index)
405 {
406         outl(index, addr + PCNET32_DWIO_RAP);
407         return inl(addr + PCNET32_DWIO_BDP) & 0xffff;
408 }
409
410 static void pcnet32_dwio_write_bcr(unsigned long addr, int index, u16 val)
411 {
412         outl(index, addr + PCNET32_DWIO_RAP);
413         outl(val, addr + PCNET32_DWIO_BDP);
414 }
415
416 static u16 pcnet32_dwio_read_rap(unsigned long addr)
417 {
418         return inl(addr + PCNET32_DWIO_RAP) & 0xffff;
419 }
420
421 static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
422 {
423         outl(val, addr + PCNET32_DWIO_RAP);
424 }
425
426 static void pcnet32_dwio_reset(unsigned long addr)
427 {
428         inl(addr + PCNET32_DWIO_RESET);
429 }
430
431 static int pcnet32_dwio_check(unsigned long addr)
432 {
433         outl(88, addr + PCNET32_DWIO_RAP);
434         return (inl(addr + PCNET32_DWIO_RAP) & 0xffff) == 88;
435 }
436
437 static struct pcnet32_access pcnet32_dwio = {
438         .read_csr = pcnet32_dwio_read_csr,
439         .write_csr = pcnet32_dwio_write_csr,
440         .read_bcr = pcnet32_dwio_read_bcr,
441         .write_bcr = pcnet32_dwio_write_bcr,
442         .read_rap = pcnet32_dwio_read_rap,
443         .write_rap = pcnet32_dwio_write_rap,
444         .reset = pcnet32_dwio_reset
445 };
446
447 static void pcnet32_netif_stop(struct net_device *dev)
448 {
449         struct pcnet32_private *lp = netdev_priv(dev);
450
451         dev->trans_start = jiffies; /* prevent tx timeout */
452         napi_disable(&lp->napi);
453         netif_tx_disable(dev);
454 }
455
456 static void pcnet32_netif_start(struct net_device *dev)
457 {
458         struct pcnet32_private *lp = netdev_priv(dev);
459         ulong ioaddr = dev->base_addr;
460         u16 val;
461
462         netif_wake_queue(dev);
463         val = lp->a.read_csr(ioaddr, CSR3);
464         val &= 0x00ff;
465         lp->a.write_csr(ioaddr, CSR3, val);
466         napi_enable(&lp->napi);
467 }
468
469 /*
470  * Allocate space for the new sized tx ring.
471  * Free old resources
472  * Save new resources.
473  * Any failure keeps old resources.
474  * Must be called with lp->lock held.
475  */
476 static void pcnet32_realloc_tx_ring(struct net_device *dev,
477                                     struct pcnet32_private *lp,
478                                     unsigned int size)
479 {
480         dma_addr_t new_ring_dma_addr;
481         dma_addr_t *new_dma_addr_list;
482         struct pcnet32_tx_head *new_tx_ring;
483         struct sk_buff **new_skb_list;
484
485         pcnet32_purge_tx_ring(dev);
486
487         new_tx_ring = pci_alloc_consistent(lp->pci_dev,
488                                            sizeof(struct pcnet32_tx_head) *
489                                            (1 << size),
490                                            &new_ring_dma_addr);
491         if (new_tx_ring == NULL) {
492                 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
493                 return;
494         }
495         memset(new_tx_ring, 0, sizeof(struct pcnet32_tx_head) * (1 << size));
496
497         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
498                                 GFP_ATOMIC);
499         if (!new_dma_addr_list) {
500                 netif_err(lp, drv, dev, "Memory allocation failed\n");
501                 goto free_new_tx_ring;
502         }
503
504         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
505                                 GFP_ATOMIC);
506         if (!new_skb_list) {
507                 netif_err(lp, drv, dev, "Memory allocation failed\n");
508                 goto free_new_lists;
509         }
510
511         kfree(lp->tx_skbuff);
512         kfree(lp->tx_dma_addr);
513         pci_free_consistent(lp->pci_dev,
514                             sizeof(struct pcnet32_tx_head) *
515                             lp->tx_ring_size, lp->tx_ring,
516                             lp->tx_ring_dma_addr);
517
518         lp->tx_ring_size = (1 << size);
519         lp->tx_mod_mask = lp->tx_ring_size - 1;
520         lp->tx_len_bits = (size << 12);
521         lp->tx_ring = new_tx_ring;
522         lp->tx_ring_dma_addr = new_ring_dma_addr;
523         lp->tx_dma_addr = new_dma_addr_list;
524         lp->tx_skbuff = new_skb_list;
525         return;
526
527 free_new_lists:
528         kfree(new_dma_addr_list);
529 free_new_tx_ring:
530         pci_free_consistent(lp->pci_dev,
531                             sizeof(struct pcnet32_tx_head) *
532                             (1 << size),
533                             new_tx_ring,
534                             new_ring_dma_addr);
535 }
536
537 /*
538  * Allocate space for the new sized rx ring.
539  * Re-use old receive buffers.
540  *   alloc extra buffers
541  *   free unneeded buffers
542  *   free unneeded buffers
543  * Save new resources.
544  * Any failure keeps old resources.
545  * Must be called with lp->lock held.
546  */
547 static void pcnet32_realloc_rx_ring(struct net_device *dev,
548                                     struct pcnet32_private *lp,
549                                     unsigned int size)
550 {
551         dma_addr_t new_ring_dma_addr;
552         dma_addr_t *new_dma_addr_list;
553         struct pcnet32_rx_head *new_rx_ring;
554         struct sk_buff **new_skb_list;
555         int new, overlap;
556
557         new_rx_ring = pci_alloc_consistent(lp->pci_dev,
558                                            sizeof(struct pcnet32_rx_head) *
559                                            (1 << size),
560                                            &new_ring_dma_addr);
561         if (new_rx_ring == NULL) {
562                 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
563                 return;
564         }
565         memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * (1 << size));
566
567         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
568                                 GFP_ATOMIC);
569         if (!new_dma_addr_list) {
570                 netif_err(lp, drv, dev, "Memory allocation failed\n");
571                 goto free_new_rx_ring;
572         }
573
574         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
575                                 GFP_ATOMIC);
576         if (!new_skb_list) {
577                 netif_err(lp, drv, dev, "Memory allocation failed\n");
578                 goto free_new_lists;
579         }
580
581         /* first copy the current receive buffers */
582         overlap = min(size, lp->rx_ring_size);
583         for (new = 0; new < overlap; new++) {
584                 new_rx_ring[new] = lp->rx_ring[new];
585                 new_dma_addr_list[new] = lp->rx_dma_addr[new];
586                 new_skb_list[new] = lp->rx_skbuff[new];
587         }
588         /* now allocate any new buffers needed */
589         for (; new < size; new++) {
590                 struct sk_buff *rx_skbuff;
591                 new_skb_list[new] = dev_alloc_skb(PKT_BUF_SKB);
592                 rx_skbuff = new_skb_list[new];
593                 if (!rx_skbuff) {
594                         /* keep the original lists and buffers */
595                         netif_err(lp, drv, dev, "%s dev_alloc_skb failed\n",
596                                   __func__);
597                         goto free_all_new;
598                 }
599                 skb_reserve(rx_skbuff, NET_IP_ALIGN);
600
601                 new_dma_addr_list[new] =
602                             pci_map_single(lp->pci_dev, rx_skbuff->data,
603                                            PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
604                 new_rx_ring[new].base = cpu_to_le32(new_dma_addr_list[new]);
605                 new_rx_ring[new].buf_length = cpu_to_le16(NEG_BUF_SIZE);
606                 new_rx_ring[new].status = cpu_to_le16(0x8000);
607         }
608         /* and free any unneeded buffers */
609         for (; new < lp->rx_ring_size; new++) {
610                 if (lp->rx_skbuff[new]) {
611                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[new],
612                                          PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
613                         dev_kfree_skb(lp->rx_skbuff[new]);
614                 }
615         }
616
617         kfree(lp->rx_skbuff);
618         kfree(lp->rx_dma_addr);
619         pci_free_consistent(lp->pci_dev,
620                             sizeof(struct pcnet32_rx_head) *
621                             lp->rx_ring_size, lp->rx_ring,
622                             lp->rx_ring_dma_addr);
623
624         lp->rx_ring_size = (1 << size);
625         lp->rx_mod_mask = lp->rx_ring_size - 1;
626         lp->rx_len_bits = (size << 4);
627         lp->rx_ring = new_rx_ring;
628         lp->rx_ring_dma_addr = new_ring_dma_addr;
629         lp->rx_dma_addr = new_dma_addr_list;
630         lp->rx_skbuff = new_skb_list;
631         return;
632
633 free_all_new:
634         while (--new >= lp->rx_ring_size) {
635                 if (new_skb_list[new]) {
636                         pci_unmap_single(lp->pci_dev, new_dma_addr_list[new],
637                                          PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
638                         dev_kfree_skb(new_skb_list[new]);
639                 }
640         }
641         kfree(new_skb_list);
642 free_new_lists:
643         kfree(new_dma_addr_list);
644 free_new_rx_ring:
645         pci_free_consistent(lp->pci_dev,
646                             sizeof(struct pcnet32_rx_head) *
647                             (1 << size),
648                             new_rx_ring,
649                             new_ring_dma_addr);
650 }
651
652 static void pcnet32_purge_rx_ring(struct net_device *dev)
653 {
654         struct pcnet32_private *lp = netdev_priv(dev);
655         int i;
656
657         /* free all allocated skbuffs */
658         for (i = 0; i < lp->rx_ring_size; i++) {
659                 lp->rx_ring[i].status = 0;      /* CPU owns buffer */
660                 wmb();          /* Make sure adapter sees owner change */
661                 if (lp->rx_skbuff[i]) {
662                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
663                                          PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
664                         dev_kfree_skb_any(lp->rx_skbuff[i]);
665                 }
666                 lp->rx_skbuff[i] = NULL;
667                 lp->rx_dma_addr[i] = 0;
668         }
669 }
670
671 #ifdef CONFIG_NET_POLL_CONTROLLER
672 static void pcnet32_poll_controller(struct net_device *dev)
673 {
674         disable_irq(dev->irq);
675         pcnet32_interrupt(0, dev);
676         enable_irq(dev->irq);
677 }
678 #endif
679
680 static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
681 {
682         struct pcnet32_private *lp = netdev_priv(dev);
683         unsigned long flags;
684         int r = -EOPNOTSUPP;
685
686         if (lp->mii) {
687                 spin_lock_irqsave(&lp->lock, flags);
688                 mii_ethtool_gset(&lp->mii_if, cmd);
689                 spin_unlock_irqrestore(&lp->lock, flags);
690                 r = 0;
691         }
692         return r;
693 }
694
695 static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
696 {
697         struct pcnet32_private *lp = netdev_priv(dev);
698         unsigned long flags;
699         int r = -EOPNOTSUPP;
700
701         if (lp->mii) {
702                 spin_lock_irqsave(&lp->lock, flags);
703                 r = mii_ethtool_sset(&lp->mii_if, cmd);
704                 spin_unlock_irqrestore(&lp->lock, flags);
705         }
706         return r;
707 }
708
709 static void pcnet32_get_drvinfo(struct net_device *dev,
710                                 struct ethtool_drvinfo *info)
711 {
712         struct pcnet32_private *lp = netdev_priv(dev);
713
714         strcpy(info->driver, DRV_NAME);
715         strcpy(info->version, DRV_VERSION);
716         if (lp->pci_dev)
717                 strcpy(info->bus_info, pci_name(lp->pci_dev));
718         else
719                 sprintf(info->bus_info, "VLB 0x%lx", dev->base_addr);
720 }
721
722 static u32 pcnet32_get_link(struct net_device *dev)
723 {
724         struct pcnet32_private *lp = netdev_priv(dev);
725         unsigned long flags;
726         int r;
727
728         spin_lock_irqsave(&lp->lock, flags);
729         if (lp->mii) {
730                 r = mii_link_ok(&lp->mii_if);
731         } else if (lp->chip_version >= PCNET32_79C970A) {
732                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
733                 r = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
734         } else {        /* can not detect link on really old chips */
735                 r = 1;
736         }
737         spin_unlock_irqrestore(&lp->lock, flags);
738
739         return r;
740 }
741
742 static u32 pcnet32_get_msglevel(struct net_device *dev)
743 {
744         struct pcnet32_private *lp = netdev_priv(dev);
745         return lp->msg_enable;
746 }
747
748 static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
749 {
750         struct pcnet32_private *lp = netdev_priv(dev);
751         lp->msg_enable = value;
752 }
753
754 static int pcnet32_nway_reset(struct net_device *dev)
755 {
756         struct pcnet32_private *lp = netdev_priv(dev);
757         unsigned long flags;
758         int r = -EOPNOTSUPP;
759
760         if (lp->mii) {
761                 spin_lock_irqsave(&lp->lock, flags);
762                 r = mii_nway_restart(&lp->mii_if);
763                 spin_unlock_irqrestore(&lp->lock, flags);
764         }
765         return r;
766 }
767
768 static void pcnet32_get_ringparam(struct net_device *dev,
769                                   struct ethtool_ringparam *ering)
770 {
771         struct pcnet32_private *lp = netdev_priv(dev);
772
773         ering->tx_max_pending = TX_MAX_RING_SIZE;
774         ering->tx_pending = lp->tx_ring_size;
775         ering->rx_max_pending = RX_MAX_RING_SIZE;
776         ering->rx_pending = lp->rx_ring_size;
777 }
778
779 static int pcnet32_set_ringparam(struct net_device *dev,
780                                  struct ethtool_ringparam *ering)
781 {
782         struct pcnet32_private *lp = netdev_priv(dev);
783         unsigned long flags;
784         unsigned int size;
785         ulong ioaddr = dev->base_addr;
786         int i;
787
788         if (ering->rx_mini_pending || ering->rx_jumbo_pending)
789                 return -EINVAL;
790
791         if (netif_running(dev))
792                 pcnet32_netif_stop(dev);
793
794         spin_lock_irqsave(&lp->lock, flags);
795         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
796
797         size = min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
798
799         /* set the minimum ring size to 4, to allow the loopback test to work
800          * unchanged.
801          */
802         for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
803                 if (size <= (1 << i))
804                         break;
805         }
806         if ((1 << i) != lp->tx_ring_size)
807                 pcnet32_realloc_tx_ring(dev, lp, i);
808
809         size = min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
810         for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
811                 if (size <= (1 << i))
812                         break;
813         }
814         if ((1 << i) != lp->rx_ring_size)
815                 pcnet32_realloc_rx_ring(dev, lp, i);
816
817         lp->napi.weight = lp->rx_ring_size / 2;
818
819         if (netif_running(dev)) {
820                 pcnet32_netif_start(dev);
821                 pcnet32_restart(dev, CSR0_NORMAL);
822         }
823
824         spin_unlock_irqrestore(&lp->lock, flags);
825
826         netif_info(lp, drv, dev, "Ring Param Settings: RX: %d, TX: %d\n",
827                    lp->rx_ring_size, lp->tx_ring_size);
828
829         return 0;
830 }
831
832 static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
833                                 u8 *data)
834 {
835         memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
836 }
837
838 static int pcnet32_get_sset_count(struct net_device *dev, int sset)
839 {
840         switch (sset) {
841         case ETH_SS_TEST:
842                 return PCNET32_TEST_LEN;
843         default:
844                 return -EOPNOTSUPP;
845         }
846 }
847
848 static void pcnet32_ethtool_test(struct net_device *dev,
849                                  struct ethtool_test *test, u64 * data)
850 {
851         struct pcnet32_private *lp = netdev_priv(dev);
852         int rc;
853
854         if (test->flags == ETH_TEST_FL_OFFLINE) {
855                 rc = pcnet32_loopback_test(dev, data);
856                 if (rc) {
857                         netif_printk(lp, hw, KERN_DEBUG, dev,
858                                      "Loopback test failed\n");
859                         test->flags |= ETH_TEST_FL_FAILED;
860                 } else
861                         netif_printk(lp, hw, KERN_DEBUG, dev,
862                                      "Loopback test passed\n");
863         } else
864                 netif_printk(lp, hw, KERN_DEBUG, dev,
865                              "No tests to run (specify 'Offline' on ethtool)\n");
866 }                               /* end pcnet32_ethtool_test */
867
868 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
869 {
870         struct pcnet32_private *lp = netdev_priv(dev);
871         struct pcnet32_access *a = &lp->a;      /* access to registers */
872         ulong ioaddr = dev->base_addr;  /* card base I/O address */
873         struct sk_buff *skb;    /* sk buff */
874         int x, i;               /* counters */
875         int numbuffs = 4;       /* number of TX/RX buffers and descs */
876         u16 status = 0x8300;    /* TX ring status */
877         __le16 teststatus;      /* test of ring status */
878         int rc;                 /* return code */
879         int size;               /* size of packets */
880         unsigned char *packet;  /* source packet data */
881         static const int data_len = 60; /* length of source packets */
882         unsigned long flags;
883         unsigned long ticks;
884
885         rc = 1;                 /* default to fail */
886
887         if (netif_running(dev))
888                 pcnet32_netif_stop(dev);
889
890         spin_lock_irqsave(&lp->lock, flags);
891         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
892
893         numbuffs = min(numbuffs, (int)min(lp->rx_ring_size, lp->tx_ring_size));
894
895         /* Reset the PCNET32 */
896         lp->a.reset(ioaddr);
897         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
898
899         /* switch pcnet32 to 32bit mode */
900         lp->a.write_bcr(ioaddr, 20, 2);
901
902         /* purge & init rings but don't actually restart */
903         pcnet32_restart(dev, 0x0000);
904
905         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
906
907         /* Initialize Transmit buffers. */
908         size = data_len + 15;
909         for (x = 0; x < numbuffs; x++) {
910                 skb = dev_alloc_skb(size);
911                 if (!skb) {
912                         netif_printk(lp, hw, KERN_DEBUG, dev,
913                                      "Cannot allocate skb at line: %d!\n",
914                                      __LINE__);
915                         goto clean_up;
916                 }
917                 packet = skb->data;
918                 skb_put(skb, size);     /* create space for data */
919                 lp->tx_skbuff[x] = skb;
920                 lp->tx_ring[x].length = cpu_to_le16(-skb->len);
921                 lp->tx_ring[x].misc = 0;
922
923                 /* put DA and SA into the skb */
924                 for (i = 0; i < 6; i++)
925                         *packet++ = dev->dev_addr[i];
926                 for (i = 0; i < 6; i++)
927                         *packet++ = dev->dev_addr[i];
928                 /* type */
929                 *packet++ = 0x08;
930                 *packet++ = 0x06;
931                 /* packet number */
932                 *packet++ = x;
933                 /* fill packet with data */
934                 for (i = 0; i < data_len; i++)
935                         *packet++ = i;
936
937                 lp->tx_dma_addr[x] =
938                         pci_map_single(lp->pci_dev, skb->data, skb->len,
939                                        PCI_DMA_TODEVICE);
940                 lp->tx_ring[x].base = cpu_to_le32(lp->tx_dma_addr[x]);
941                 wmb();  /* Make sure owner changes after all others are visible */
942                 lp->tx_ring[x].status = cpu_to_le16(status);
943         }
944
945         x = a->read_bcr(ioaddr, 32);    /* set internal loopback in BCR32 */
946         a->write_bcr(ioaddr, 32, x | 0x0002);
947
948         /* set int loopback in CSR15 */
949         x = a->read_csr(ioaddr, CSR15) & 0xfffc;
950         lp->a.write_csr(ioaddr, CSR15, x | 0x0044);
951
952         teststatus = cpu_to_le16(0x8000);
953         lp->a.write_csr(ioaddr, CSR0, CSR0_START);      /* Set STRT bit */
954
955         /* Check status of descriptors */
956         for (x = 0; x < numbuffs; x++) {
957                 ticks = 0;
958                 rmb();
959                 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
960                         spin_unlock_irqrestore(&lp->lock, flags);
961                         msleep(1);
962                         spin_lock_irqsave(&lp->lock, flags);
963                         rmb();
964                         ticks++;
965                 }
966                 if (ticks == 200) {
967                         netif_err(lp, hw, dev, "Desc %d failed to reset!\n", x);
968                         break;
969                 }
970         }
971
972         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
973         wmb();
974         if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
975                 netdev_printk(KERN_DEBUG, dev, "RX loopback packets:\n");
976
977                 for (x = 0; x < numbuffs; x++) {
978                         netdev_printk(KERN_DEBUG, dev, "Packet %d: ", x);
979                         skb = lp->rx_skbuff[x];
980                         for (i = 0; i < size; i++)
981                                 pr_cont(" %02x", *(skb->data + i));
982                         pr_cont("\n");
983                 }
984         }
985
986         x = 0;
987         rc = 0;
988         while (x < numbuffs && !rc) {
989                 skb = lp->rx_skbuff[x];
990                 packet = lp->tx_skbuff[x]->data;
991                 for (i = 0; i < size; i++) {
992                         if (*(skb->data + i) != packet[i]) {
993                                 netif_printk(lp, hw, KERN_DEBUG, dev,
994                                              "Error in compare! %2x - %02x %02x\n",
995                                              i, *(skb->data + i), packet[i]);
996                                 rc = 1;
997                                 break;
998                         }
999                 }
1000                 x++;
1001         }
1002
1003 clean_up:
1004         *data1 = rc;
1005         pcnet32_purge_tx_ring(dev);
1006
1007         x = a->read_csr(ioaddr, CSR15);
1008         a->write_csr(ioaddr, CSR15, (x & ~0x0044));     /* reset bits 6 and 2 */
1009
1010         x = a->read_bcr(ioaddr, 32);    /* reset internal loopback */
1011         a->write_bcr(ioaddr, 32, (x & ~0x0002));
1012
1013         if (netif_running(dev)) {
1014                 pcnet32_netif_start(dev);
1015                 pcnet32_restart(dev, CSR0_NORMAL);
1016         } else {
1017                 pcnet32_purge_rx_ring(dev);
1018                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1019         }
1020         spin_unlock_irqrestore(&lp->lock, flags);
1021
1022         return rc;
1023 }                               /* end pcnet32_loopback_test  */
1024
1025 static int pcnet32_set_phys_id(struct net_device *dev,
1026                                enum ethtool_phys_id_state state)
1027 {
1028         struct pcnet32_private *lp = netdev_priv(dev);
1029         struct pcnet32_access *a = &lp->a;
1030         ulong ioaddr = dev->base_addr;
1031         unsigned long flags;
1032         int i;
1033
1034         switch (state) {
1035         case ETHTOOL_ID_ACTIVE:
1036                 /* Save the current value of the bcrs */
1037                 spin_lock_irqsave(&lp->lock, flags);
1038                 for (i = 4; i < 8; i++)
1039                         lp->save_regs[i - 4] = a->read_bcr(ioaddr, i);
1040                 spin_unlock_irqrestore(&lp->lock, flags);
1041                 return 2;       /* cycle on/off twice per second */
1042
1043         case ETHTOOL_ID_ON:
1044         case ETHTOOL_ID_OFF:
1045                 /* Blink the led */
1046                 spin_lock_irqsave(&lp->lock, flags);
1047                 for (i = 4; i < 8; i++)
1048                         a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
1049                 spin_unlock_irqrestore(&lp->lock, flags);
1050                 break;
1051
1052         case ETHTOOL_ID_INACTIVE:
1053                 /* Restore the original value of the bcrs */
1054                 spin_lock_irqsave(&lp->lock, flags);
1055                 for (i = 4; i < 8; i++)
1056                         a->write_bcr(ioaddr, i, lp->save_regs[i - 4]);
1057                 spin_unlock_irqrestore(&lp->lock, flags);
1058         }
1059         return 0;
1060 }
1061
1062 /*
1063  * lp->lock must be held.
1064  */
1065 static int pcnet32_suspend(struct net_device *dev, unsigned long *flags,
1066                 int can_sleep)
1067 {
1068         int csr5;
1069         struct pcnet32_private *lp = netdev_priv(dev);
1070         struct pcnet32_access *a = &lp->a;
1071         ulong ioaddr = dev->base_addr;
1072         int ticks;
1073
1074         /* really old chips have to be stopped. */
1075         if (lp->chip_version < PCNET32_79C970A)
1076                 return 0;
1077
1078         /* set SUSPEND (SPND) - CSR5 bit 0 */
1079         csr5 = a->read_csr(ioaddr, CSR5);
1080         a->write_csr(ioaddr, CSR5, csr5 | CSR5_SUSPEND);
1081
1082         /* poll waiting for bit to be set */
1083         ticks = 0;
1084         while (!(a->read_csr(ioaddr, CSR5) & CSR5_SUSPEND)) {
1085                 spin_unlock_irqrestore(&lp->lock, *flags);
1086                 if (can_sleep)
1087                         msleep(1);
1088                 else
1089                         mdelay(1);
1090                 spin_lock_irqsave(&lp->lock, *flags);
1091                 ticks++;
1092                 if (ticks > 200) {
1093                         netif_printk(lp, hw, KERN_DEBUG, dev,
1094                                      "Error getting into suspend!\n");
1095                         return 0;
1096                 }
1097         }
1098         return 1;
1099 }
1100
1101 /*
1102  * process one receive descriptor entry
1103  */
1104
1105 static void pcnet32_rx_entry(struct net_device *dev,
1106                              struct pcnet32_private *lp,
1107                              struct pcnet32_rx_head *rxp,
1108                              int entry)
1109 {
1110         int status = (short)le16_to_cpu(rxp->status) >> 8;
1111         int rx_in_place = 0;
1112         struct sk_buff *skb;
1113         short pkt_len;
1114
1115         if (status != 0x03) {   /* There was an error. */
1116                 /*
1117                  * There is a tricky error noted by John Murphy,
1118                  * <murf@perftech.com> to Russ Nelson: Even with full-sized
1119                  * buffers it's possible for a jabber packet to use two
1120                  * buffers, with only the last correctly noting the error.
1121                  */
1122                 if (status & 0x01)      /* Only count a general error at the */
1123                         dev->stats.rx_errors++; /* end of a packet. */
1124                 if (status & 0x20)
1125                         dev->stats.rx_frame_errors++;
1126                 if (status & 0x10)
1127                         dev->stats.rx_over_errors++;
1128                 if (status & 0x08)
1129                         dev->stats.rx_crc_errors++;
1130                 if (status & 0x04)
1131                         dev->stats.rx_fifo_errors++;
1132                 return;
1133         }
1134
1135         pkt_len = (le32_to_cpu(rxp->msg_length) & 0xfff) - 4;
1136
1137         /* Discard oversize frames. */
1138         if (unlikely(pkt_len > PKT_BUF_SIZE)) {
1139                 netif_err(lp, drv, dev, "Impossible packet size %d!\n",
1140                           pkt_len);
1141                 dev->stats.rx_errors++;
1142                 return;
1143         }
1144         if (pkt_len < 60) {
1145                 netif_err(lp, rx_err, dev, "Runt packet!\n");
1146                 dev->stats.rx_errors++;
1147                 return;
1148         }
1149
1150         if (pkt_len > rx_copybreak) {
1151                 struct sk_buff *newskb;
1152
1153                 newskb = dev_alloc_skb(PKT_BUF_SKB);
1154                 if (newskb) {
1155                         skb_reserve(newskb, NET_IP_ALIGN);
1156                         skb = lp->rx_skbuff[entry];
1157                         pci_unmap_single(lp->pci_dev,
1158                                          lp->rx_dma_addr[entry],
1159                                          PKT_BUF_SIZE,
1160                                          PCI_DMA_FROMDEVICE);
1161                         skb_put(skb, pkt_len);
1162                         lp->rx_skbuff[entry] = newskb;
1163                         lp->rx_dma_addr[entry] =
1164                                             pci_map_single(lp->pci_dev,
1165                                                            newskb->data,
1166                                                            PKT_BUF_SIZE,
1167                                                            PCI_DMA_FROMDEVICE);
1168                         rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
1169                         rx_in_place = 1;
1170                 } else
1171                         skb = NULL;
1172         } else
1173                 skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
1174
1175         if (skb == NULL) {
1176                 netif_err(lp, drv, dev, "Memory squeeze, dropping packet\n");
1177                 dev->stats.rx_dropped++;
1178                 return;
1179         }
1180         if (!rx_in_place) {
1181                 skb_reserve(skb, NET_IP_ALIGN);
1182                 skb_put(skb, pkt_len);  /* Make room */
1183                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1184                                             lp->rx_dma_addr[entry],
1185                                             pkt_len,
1186                                             PCI_DMA_FROMDEVICE);
1187                 skb_copy_to_linear_data(skb,
1188                                  (unsigned char *)(lp->rx_skbuff[entry]->data),
1189                                  pkt_len);
1190                 pci_dma_sync_single_for_device(lp->pci_dev,
1191                                                lp->rx_dma_addr[entry],
1192                                                pkt_len,
1193                                                PCI_DMA_FROMDEVICE);
1194         }
1195         dev->stats.rx_bytes += skb->len;
1196         skb->protocol = eth_type_trans(skb, dev);
1197         netif_receive_skb(skb);
1198         dev->stats.rx_packets++;
1199 }
1200
1201 static int pcnet32_rx(struct net_device *dev, int budget)
1202 {
1203         struct pcnet32_private *lp = netdev_priv(dev);
1204         int entry = lp->cur_rx & lp->rx_mod_mask;
1205         struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
1206         int npackets = 0;
1207
1208         /* If we own the next entry, it's a new packet. Send it up. */
1209         while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
1210                 pcnet32_rx_entry(dev, lp, rxp, entry);
1211                 npackets += 1;
1212                 /*
1213                  * The docs say that the buffer length isn't touched, but Andrew
1214                  * Boyd of QNX reports that some revs of the 79C965 clear it.
1215                  */
1216                 rxp->buf_length = cpu_to_le16(NEG_BUF_SIZE);
1217                 wmb();  /* Make sure owner changes after others are visible */
1218                 rxp->status = cpu_to_le16(0x8000);
1219                 entry = (++lp->cur_rx) & lp->rx_mod_mask;
1220                 rxp = &lp->rx_ring[entry];
1221         }
1222
1223         return npackets;
1224 }
1225
1226 static int pcnet32_tx(struct net_device *dev)
1227 {
1228         struct pcnet32_private *lp = netdev_priv(dev);
1229         unsigned int dirty_tx = lp->dirty_tx;
1230         int delta;
1231         int must_restart = 0;
1232
1233         while (dirty_tx != lp->cur_tx) {
1234                 int entry = dirty_tx & lp->tx_mod_mask;
1235                 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
1236
1237                 if (status < 0)
1238                         break;  /* It still hasn't been Txed */
1239
1240                 lp->tx_ring[entry].base = 0;
1241
1242                 if (status & 0x4000) {
1243                         /* There was a major error, log it. */
1244                         int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
1245                         dev->stats.tx_errors++;
1246                         netif_err(lp, tx_err, dev,
1247                                   "Tx error status=%04x err_status=%08x\n",
1248                                   status, err_status);
1249                         if (err_status & 0x04000000)
1250                                 dev->stats.tx_aborted_errors++;
1251                         if (err_status & 0x08000000)
1252                                 dev->stats.tx_carrier_errors++;
1253                         if (err_status & 0x10000000)
1254                                 dev->stats.tx_window_errors++;
1255 #ifndef DO_DXSUFLO
1256                         if (err_status & 0x40000000) {
1257                                 dev->stats.tx_fifo_errors++;
1258                                 /* Ackk!  On FIFO errors the Tx unit is turned off! */
1259                                 /* Remove this verbosity later! */
1260                                 netif_err(lp, tx_err, dev, "Tx FIFO error!\n");
1261                                 must_restart = 1;
1262                         }
1263 #else
1264                         if (err_status & 0x40000000) {
1265                                 dev->stats.tx_fifo_errors++;
1266                                 if (!lp->dxsuflo) {     /* If controller doesn't recover ... */
1267                                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
1268                                         /* Remove this verbosity later! */
1269                                         netif_err(lp, tx_err, dev, "Tx FIFO error!\n");
1270                                         must_restart = 1;
1271                                 }
1272                         }
1273 #endif
1274                 } else {
1275                         if (status & 0x1800)
1276                                 dev->stats.collisions++;
1277                         dev->stats.tx_packets++;
1278                 }
1279
1280                 /* We must free the original skb */
1281                 if (lp->tx_skbuff[entry]) {
1282                         pci_unmap_single(lp->pci_dev,
1283                                          lp->tx_dma_addr[entry],
1284                                          lp->tx_skbuff[entry]->
1285                                          len, PCI_DMA_TODEVICE);
1286                         dev_kfree_skb_any(lp->tx_skbuff[entry]);
1287                         lp->tx_skbuff[entry] = NULL;
1288                         lp->tx_dma_addr[entry] = 0;
1289                 }
1290                 dirty_tx++;
1291         }
1292
1293         delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
1294         if (delta > lp->tx_ring_size) {
1295                 netif_err(lp, drv, dev, "out-of-sync dirty pointer, %d vs. %d, full=%d\n",
1296                           dirty_tx, lp->cur_tx, lp->tx_full);
1297                 dirty_tx += lp->tx_ring_size;
1298                 delta -= lp->tx_ring_size;
1299         }
1300
1301         if (lp->tx_full &&
1302             netif_queue_stopped(dev) &&
1303             delta < lp->tx_ring_size - 2) {
1304                 /* The ring is no longer full, clear tbusy. */
1305                 lp->tx_full = 0;
1306                 netif_wake_queue(dev);
1307         }
1308         lp->dirty_tx = dirty_tx;
1309
1310         return must_restart;
1311 }
1312
1313 static int pcnet32_poll(struct napi_struct *napi, int budget)
1314 {
1315         struct pcnet32_private *lp = container_of(napi, struct pcnet32_private, napi);
1316         struct net_device *dev = lp->dev;
1317         unsigned long ioaddr = dev->base_addr;
1318         unsigned long flags;
1319         int work_done;
1320         u16 val;
1321
1322         work_done = pcnet32_rx(dev, budget);
1323
1324         spin_lock_irqsave(&lp->lock, flags);
1325         if (pcnet32_tx(dev)) {
1326                 /* reset the chip to clear the error condition, then restart */
1327                 lp->a.reset(ioaddr);
1328                 lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
1329                 pcnet32_restart(dev, CSR0_START);
1330                 netif_wake_queue(dev);
1331         }
1332         spin_unlock_irqrestore(&lp->lock, flags);
1333
1334         if (work_done < budget) {
1335                 spin_lock_irqsave(&lp->lock, flags);
1336
1337                 __napi_complete(napi);
1338
1339                 /* clear interrupt masks */
1340                 val = lp->a.read_csr(ioaddr, CSR3);
1341                 val &= 0x00ff;
1342                 lp->a.write_csr(ioaddr, CSR3, val);
1343
1344                 /* Set interrupt enable. */
1345                 lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
1346
1347                 spin_unlock_irqrestore(&lp->lock, flags);
1348         }
1349         return work_done;
1350 }
1351
1352 #define PCNET32_REGS_PER_PHY    32
1353 #define PCNET32_MAX_PHYS        32
1354 static int pcnet32_get_regs_len(struct net_device *dev)
1355 {
1356         struct pcnet32_private *lp = netdev_priv(dev);
1357         int j = lp->phycount * PCNET32_REGS_PER_PHY;
1358
1359         return (PCNET32_NUM_REGS + j) * sizeof(u16);
1360 }
1361
1362 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1363                              void *ptr)
1364 {
1365         int i, csr0;
1366         u16 *buff = ptr;
1367         struct pcnet32_private *lp = netdev_priv(dev);
1368         struct pcnet32_access *a = &lp->a;
1369         ulong ioaddr = dev->base_addr;
1370         unsigned long flags;
1371
1372         spin_lock_irqsave(&lp->lock, flags);
1373
1374         csr0 = a->read_csr(ioaddr, CSR0);
1375         if (!(csr0 & CSR0_STOP))        /* If not stopped */
1376                 pcnet32_suspend(dev, &flags, 1);
1377
1378         /* read address PROM */
1379         for (i = 0; i < 16; i += 2)
1380                 *buff++ = inw(ioaddr + i);
1381
1382         /* read control and status registers */
1383         for (i = 0; i < 90; i++)
1384                 *buff++ = a->read_csr(ioaddr, i);
1385
1386         *buff++ = a->read_csr(ioaddr, 112);
1387         *buff++ = a->read_csr(ioaddr, 114);
1388
1389         /* read bus configuration registers */
1390         for (i = 0; i < 30; i++)
1391                 *buff++ = a->read_bcr(ioaddr, i);
1392
1393         *buff++ = 0;            /* skip bcr30 so as not to hang 79C976 */
1394
1395         for (i = 31; i < 36; i++)
1396                 *buff++ = a->read_bcr(ioaddr, i);
1397
1398         /* read mii phy registers */
1399         if (lp->mii) {
1400                 int j;
1401                 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
1402                         if (lp->phymask & (1 << j)) {
1403                                 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
1404                                         lp->a.write_bcr(ioaddr, 33,
1405                                                         (j << 5) | i);
1406                                         *buff++ = lp->a.read_bcr(ioaddr, 34);
1407                                 }
1408                         }
1409                 }
1410         }
1411
1412         if (!(csr0 & CSR0_STOP)) {      /* If not stopped */
1413                 int csr5;
1414
1415                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
1416                 csr5 = a->read_csr(ioaddr, CSR5);
1417                 a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
1418         }
1419
1420         spin_unlock_irqrestore(&lp->lock, flags);
1421 }
1422
1423 static const struct ethtool_ops pcnet32_ethtool_ops = {
1424         .get_settings           = pcnet32_get_settings,
1425         .set_settings           = pcnet32_set_settings,
1426         .get_drvinfo            = pcnet32_get_drvinfo,
1427         .get_msglevel           = pcnet32_get_msglevel,
1428         .set_msglevel           = pcnet32_set_msglevel,
1429         .nway_reset             = pcnet32_nway_reset,
1430         .get_link               = pcnet32_get_link,
1431         .get_ringparam          = pcnet32_get_ringparam,
1432         .set_ringparam          = pcnet32_set_ringparam,
1433         .get_strings            = pcnet32_get_strings,
1434         .self_test              = pcnet32_ethtool_test,
1435         .set_phys_id            = pcnet32_set_phys_id,
1436         .get_regs_len           = pcnet32_get_regs_len,
1437         .get_regs               = pcnet32_get_regs,
1438         .get_sset_count         = pcnet32_get_sset_count,
1439 };
1440
1441 /* only probes for non-PCI devices, the rest are handled by
1442  * pci_register_driver via pcnet32_probe_pci */
1443
1444 static void __devinit pcnet32_probe_vlbus(unsigned int *pcnet32_portlist)
1445 {
1446         unsigned int *port, ioaddr;
1447
1448         /* search for PCnet32 VLB cards at known addresses */
1449         for (port = pcnet32_portlist; (ioaddr = *port); port++) {
1450                 if (request_region
1451                     (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
1452                         /* check if there is really a pcnet chip on that ioaddr */
1453                         if ((inb(ioaddr + 14) == 0x57) &&
1454                             (inb(ioaddr + 15) == 0x57)) {
1455                                 pcnet32_probe1(ioaddr, 0, NULL);
1456                         } else {
1457                                 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1458                         }
1459                 }
1460         }
1461 }
1462
1463 static int __devinit
1464 pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
1465 {
1466         unsigned long ioaddr;
1467         int err;
1468
1469         err = pci_enable_device(pdev);
1470         if (err < 0) {
1471                 if (pcnet32_debug & NETIF_MSG_PROBE)
1472                         pr_err("failed to enable device -- err=%d\n", err);
1473                 return err;
1474         }
1475         pci_set_master(pdev);
1476
1477         ioaddr = pci_resource_start(pdev, 0);
1478         if (!ioaddr) {
1479                 if (pcnet32_debug & NETIF_MSG_PROBE)
1480                         pr_err("card has no PCI IO resources, aborting\n");
1481                 return -ENODEV;
1482         }
1483
1484         if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1485                 if (pcnet32_debug & NETIF_MSG_PROBE)
1486                         pr_err("architecture does not support 32bit PCI busmaster DMA\n");
1487                 return -ENODEV;
1488         }
1489         if (!request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci")) {
1490                 if (pcnet32_debug & NETIF_MSG_PROBE)
1491                         pr_err("io address range already allocated\n");
1492                 return -EBUSY;
1493         }
1494
1495         err = pcnet32_probe1(ioaddr, 1, pdev);
1496         if (err < 0)
1497                 pci_disable_device(pdev);
1498
1499         return err;
1500 }
1501
1502 static const struct net_device_ops pcnet32_netdev_ops = {
1503         .ndo_open               = pcnet32_open,
1504         .ndo_stop               = pcnet32_close,
1505         .ndo_start_xmit         = pcnet32_start_xmit,
1506         .ndo_tx_timeout         = pcnet32_tx_timeout,
1507         .ndo_get_stats          = pcnet32_get_stats,
1508         .ndo_set_multicast_list = pcnet32_set_multicast_list,
1509         .ndo_do_ioctl           = pcnet32_ioctl,
1510         .ndo_change_mtu         = eth_change_mtu,
1511         .ndo_set_mac_address    = eth_mac_addr,
1512         .ndo_validate_addr      = eth_validate_addr,
1513 #ifdef CONFIG_NET_POLL_CONTROLLER
1514         .ndo_poll_controller    = pcnet32_poll_controller,
1515 #endif
1516 };
1517
1518 /* pcnet32_probe1
1519  *  Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1520  *  pdev will be NULL when called from pcnet32_probe_vlbus.
1521  */
1522 static int __devinit
1523 pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1524 {
1525         struct pcnet32_private *lp;
1526         int i, media;
1527         int fdx, mii, fset, dxsuflo;
1528         int chip_version;
1529         char *chipname;
1530         struct net_device *dev;
1531         struct pcnet32_access *a = NULL;
1532         u8 promaddr[6];
1533         int ret = -ENODEV;
1534
1535         /* reset the chip */
1536         pcnet32_wio_reset(ioaddr);
1537
1538         /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1539         if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1540                 a = &pcnet32_wio;
1541         } else {
1542                 pcnet32_dwio_reset(ioaddr);
1543                 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4 &&
1544                     pcnet32_dwio_check(ioaddr)) {
1545                         a = &pcnet32_dwio;
1546                 } else {
1547                         if (pcnet32_debug & NETIF_MSG_PROBE)
1548                                 pr_err("No access methods\n");
1549                         goto err_release_region;
1550                 }
1551         }
1552
1553         chip_version =
1554             a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1555         if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1556                 pr_info("  PCnet chip version is %#x\n", chip_version);
1557         if ((chip_version & 0xfff) != 0x003) {
1558                 if (pcnet32_debug & NETIF_MSG_PROBE)
1559                         pr_info("Unsupported chip version\n");
1560                 goto err_release_region;
1561         }
1562
1563         /* initialize variables */
1564         fdx = mii = fset = dxsuflo = 0;
1565         chip_version = (chip_version >> 12) & 0xffff;
1566
1567         switch (chip_version) {
1568         case 0x2420:
1569                 chipname = "PCnet/PCI 79C970";  /* PCI */
1570                 break;
1571         case 0x2430:
1572                 if (shared)
1573                         chipname = "PCnet/PCI 79C970";  /* 970 gives the wrong chip id back */
1574                 else
1575                         chipname = "PCnet/32 79C965";   /* 486/VL bus */
1576                 break;
1577         case 0x2621:
1578                 chipname = "PCnet/PCI II 79C970A";      /* PCI */
1579                 fdx = 1;
1580                 break;
1581         case 0x2623:
1582                 chipname = "PCnet/FAST 79C971"; /* PCI */
1583                 fdx = 1;
1584                 mii = 1;
1585                 fset = 1;
1586                 break;
1587         case 0x2624:
1588                 chipname = "PCnet/FAST+ 79C972";        /* PCI */
1589                 fdx = 1;
1590                 mii = 1;
1591                 fset = 1;
1592                 break;
1593         case 0x2625:
1594                 chipname = "PCnet/FAST III 79C973";     /* PCI */
1595                 fdx = 1;
1596                 mii = 1;
1597                 break;
1598         case 0x2626:
1599                 chipname = "PCnet/Home 79C978"; /* PCI */
1600                 fdx = 1;
1601                 /*
1602                  * This is based on specs published at www.amd.com.  This section
1603                  * assumes that a card with a 79C978 wants to go into standard
1604                  * ethernet mode.  The 79C978 can also go into 1Mb HomePNA mode,
1605                  * and the module option homepna=1 can select this instead.
1606                  */
1607                 media = a->read_bcr(ioaddr, 49);
1608                 media &= ~3;    /* default to 10Mb ethernet */
1609                 if (cards_found < MAX_UNITS && homepna[cards_found])
1610                         media |= 1;     /* switch to home wiring mode */
1611                 if (pcnet32_debug & NETIF_MSG_PROBE)
1612                         printk(KERN_DEBUG PFX "media set to %sMbit mode\n",
1613                                (media & 1) ? "1" : "10");
1614                 a->write_bcr(ioaddr, 49, media);
1615                 break;
1616         case 0x2627:
1617                 chipname = "PCnet/FAST III 79C975";     /* PCI */
1618                 fdx = 1;
1619                 mii = 1;
1620                 break;
1621         case 0x2628:
1622                 chipname = "PCnet/PRO 79C976";
1623                 fdx = 1;
1624                 mii = 1;
1625                 break;
1626         default:
1627                 if (pcnet32_debug & NETIF_MSG_PROBE)
1628                         pr_info("PCnet version %#x, no PCnet32 chip\n",
1629                                 chip_version);
1630                 goto err_release_region;
1631         }
1632
1633         /*
1634          *  On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1635          *  starting until the packet is loaded. Strike one for reliability, lose
1636          *  one for latency - although on PCI this isn't a big loss. Older chips
1637          *  have FIFO's smaller than a packet, so you can't do this.
1638          *  Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1639          */
1640
1641         if (fset) {
1642                 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1643                 a->write_csr(ioaddr, 80,
1644                              (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1645                 dxsuflo = 1;
1646         }
1647
1648         dev = alloc_etherdev(sizeof(*lp));
1649         if (!dev) {
1650                 if (pcnet32_debug & NETIF_MSG_PROBE)
1651                         pr_err("Memory allocation failed\n");
1652                 ret = -ENOMEM;
1653                 goto err_release_region;
1654         }
1655
1656         if (pdev)
1657                 SET_NETDEV_DEV(dev, &pdev->dev);
1658
1659         if (pcnet32_debug & NETIF_MSG_PROBE)
1660                 pr_info("%s at %#3lx,", chipname, ioaddr);
1661
1662         /* In most chips, after a chip reset, the ethernet address is read from the
1663          * station address PROM at the base address and programmed into the
1664          * "Physical Address Registers" CSR12-14.
1665          * As a precautionary measure, we read the PROM values and complain if
1666          * they disagree with the CSRs.  If they miscompare, and the PROM addr
1667          * is valid, then the PROM addr is used.
1668          */
1669         for (i = 0; i < 3; i++) {
1670                 unsigned int val;
1671                 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1672                 /* There may be endianness issues here. */
1673                 dev->dev_addr[2 * i] = val & 0x0ff;
1674                 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1675         }
1676
1677         /* read PROM address and compare with CSR address */
1678         for (i = 0; i < 6; i++)
1679                 promaddr[i] = inb(ioaddr + i);
1680
1681         if (memcmp(promaddr, dev->dev_addr, 6) ||
1682             !is_valid_ether_addr(dev->dev_addr)) {
1683                 if (is_valid_ether_addr(promaddr)) {
1684                         if (pcnet32_debug & NETIF_MSG_PROBE) {
1685                                 pr_cont(" warning: CSR address invalid,\n");
1686                                 pr_info("    using instead PROM address of");
1687                         }
1688                         memcpy(dev->dev_addr, promaddr, 6);
1689                 }
1690         }
1691         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1692
1693         /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1694         if (!is_valid_ether_addr(dev->perm_addr))
1695                 memset(dev->dev_addr, 0, ETH_ALEN);
1696
1697         if (pcnet32_debug & NETIF_MSG_PROBE) {
1698                 pr_cont(" %pM", dev->dev_addr);
1699
1700                 /* Version 0x2623 and 0x2624 */
1701                 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1702                         i = a->read_csr(ioaddr, 80) & 0x0C00;   /* Check tx_start_pt */
1703                         pr_info("    tx_start_pt(0x%04x):", i);
1704                         switch (i >> 10) {
1705                         case 0:
1706                                 pr_cont("  20 bytes,");
1707                                 break;
1708                         case 1:
1709                                 pr_cont("  64 bytes,");
1710                                 break;
1711                         case 2:
1712                                 pr_cont(" 128 bytes,");
1713                                 break;
1714                         case 3:
1715                                 pr_cont("~220 bytes,");
1716                                 break;
1717                         }
1718                         i = a->read_bcr(ioaddr, 18);    /* Check Burst/Bus control */
1719                         pr_cont(" BCR18(%x):", i & 0xffff);
1720                         if (i & (1 << 5))
1721                                 pr_cont("BurstWrEn ");
1722                         if (i & (1 << 6))
1723                                 pr_cont("BurstRdEn ");
1724                         if (i & (1 << 7))
1725                                 pr_cont("DWordIO ");
1726                         if (i & (1 << 11))
1727                                 pr_cont("NoUFlow ");
1728                         i = a->read_bcr(ioaddr, 25);
1729                         pr_info("    SRAMSIZE=0x%04x,", i << 8);
1730                         i = a->read_bcr(ioaddr, 26);
1731                         pr_cont(" SRAM_BND=0x%04x,", i << 8);
1732                         i = a->read_bcr(ioaddr, 27);
1733                         if (i & (1 << 14))
1734                                 pr_cont("LowLatRx");
1735                 }
1736         }
1737
1738         dev->base_addr = ioaddr;
1739         lp = netdev_priv(dev);
1740         /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1741         lp->init_block = pci_alloc_consistent(pdev, sizeof(*lp->init_block),
1742                                               &lp->init_dma_addr);
1743         if (!lp->init_block) {
1744                 if (pcnet32_debug & NETIF_MSG_PROBE)
1745                         pr_err("Consistent memory allocation failed\n");
1746                 ret = -ENOMEM;
1747                 goto err_free_netdev;
1748         }
1749         lp->pci_dev = pdev;
1750
1751         lp->dev = dev;
1752
1753         spin_lock_init(&lp->lock);
1754
1755         lp->name = chipname;
1756         lp->shared_irq = shared;
1757         lp->tx_ring_size = TX_RING_SIZE;        /* default tx ring size */
1758         lp->rx_ring_size = RX_RING_SIZE;        /* default rx ring size */
1759         lp->tx_mod_mask = lp->tx_ring_size - 1;
1760         lp->rx_mod_mask = lp->rx_ring_size - 1;
1761         lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1762         lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1763         lp->mii_if.full_duplex = fdx;
1764         lp->mii_if.phy_id_mask = 0x1f;
1765         lp->mii_if.reg_num_mask = 0x1f;
1766         lp->dxsuflo = dxsuflo;
1767         lp->mii = mii;
1768         lp->chip_version = chip_version;
1769         lp->msg_enable = pcnet32_debug;
1770         if ((cards_found >= MAX_UNITS) ||
1771             (options[cards_found] >= sizeof(options_mapping)))
1772                 lp->options = PCNET32_PORT_ASEL;
1773         else
1774                 lp->options = options_mapping[options[cards_found]];
1775         lp->mii_if.dev = dev;
1776         lp->mii_if.mdio_read = mdio_read;
1777         lp->mii_if.mdio_write = mdio_write;
1778
1779         /* napi.weight is used in both the napi and non-napi cases */
1780         lp->napi.weight = lp->rx_ring_size / 2;
1781
1782         netif_napi_add(dev, &lp->napi, pcnet32_poll, lp->rx_ring_size / 2);
1783
1784         if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1785             ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1786                 lp->options |= PCNET32_PORT_FD;
1787
1788         lp->a = *a;
1789
1790         /* prior to register_netdev, dev->name is not yet correct */
1791         if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1792                 ret = -ENOMEM;
1793                 goto err_free_ring;
1794         }
1795         /* detect special T1/E1 WAN card by checking for MAC address */
1796         if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 &&
1797             dev->dev_addr[2] == 0x75)
1798                 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1799
1800         lp->init_block->mode = cpu_to_le16(0x0003);     /* Disable Rx and Tx. */
1801         lp->init_block->tlen_rlen =
1802             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
1803         for (i = 0; i < 6; i++)
1804                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
1805         lp->init_block->filter[0] = 0x00000000;
1806         lp->init_block->filter[1] = 0x00000000;
1807         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
1808         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
1809
1810         /* switch pcnet32 to 32bit mode */
1811         a->write_bcr(ioaddr, 20, 2);
1812
1813         a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
1814         a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
1815
1816         if (pdev) {             /* use the IRQ provided by PCI */
1817                 dev->irq = pdev->irq;
1818                 if (pcnet32_debug & NETIF_MSG_PROBE)
1819                         pr_cont(" assigned IRQ %d\n", dev->irq);
1820         } else {
1821                 unsigned long irq_mask = probe_irq_on();
1822
1823                 /*
1824                  * To auto-IRQ we enable the initialization-done and DMA error
1825                  * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1826                  * boards will work.
1827                  */
1828                 /* Trigger an initialization just for the interrupt. */
1829                 a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_INIT);
1830                 mdelay(1);
1831
1832                 dev->irq = probe_irq_off(irq_mask);
1833                 if (!dev->irq) {
1834                         if (pcnet32_debug & NETIF_MSG_PROBE)
1835                                 pr_cont(", failed to detect IRQ line\n");
1836                         ret = -ENODEV;
1837                         goto err_free_ring;
1838                 }
1839                 if (pcnet32_debug & NETIF_MSG_PROBE)
1840                         pr_cont(", probed IRQ %d\n", dev->irq);
1841         }
1842
1843         /* Set the mii phy_id so that we can query the link state */
1844         if (lp->mii) {
1845                 /* lp->phycount and lp->phymask are set to 0 by memset above */
1846
1847                 lp->mii_if.phy_id = ((lp->a.read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1848                 /* scan for PHYs */
1849                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1850                         unsigned short id1, id2;
1851
1852                         id1 = mdio_read(dev, i, MII_PHYSID1);
1853                         if (id1 == 0xffff)
1854                                 continue;
1855                         id2 = mdio_read(dev, i, MII_PHYSID2);
1856                         if (id2 == 0xffff)
1857                                 continue;
1858                         if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1859                                 continue;       /* 79C971 & 79C972 have phantom phy at id 31 */
1860                         lp->phycount++;
1861                         lp->phymask |= (1 << i);
1862                         lp->mii_if.phy_id = i;
1863                         if (pcnet32_debug & NETIF_MSG_PROBE)
1864                                 pr_info("Found PHY %04x:%04x at address %d\n",
1865                                         id1, id2, i);
1866                 }
1867                 lp->a.write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1868                 if (lp->phycount > 1)
1869                         lp->options |= PCNET32_PORT_MII;
1870         }
1871
1872         init_timer(&lp->watchdog_timer);
1873         lp->watchdog_timer.data = (unsigned long)dev;
1874         lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1875
1876         /* The PCNET32-specific entries in the device structure. */
1877         dev->netdev_ops = &pcnet32_netdev_ops;
1878         dev->ethtool_ops = &pcnet32_ethtool_ops;
1879         dev->watchdog_timeo = (5 * HZ);
1880
1881         /* Fill in the generic fields of the device structure. */
1882         if (register_netdev(dev))
1883                 goto err_free_ring;
1884
1885         if (pdev) {
1886                 pci_set_drvdata(pdev, dev);
1887         } else {
1888                 lp->next = pcnet32_dev;
1889                 pcnet32_dev = dev;
1890         }
1891
1892         if (pcnet32_debug & NETIF_MSG_PROBE)
1893                 pr_info("%s: registered as %s\n", dev->name, lp->name);
1894         cards_found++;
1895
1896         /* enable LED writes */
1897         a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1898
1899         return 0;
1900
1901 err_free_ring:
1902         pcnet32_free_ring(dev);
1903         pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
1904                             lp->init_block, lp->init_dma_addr);
1905 err_free_netdev:
1906         free_netdev(dev);
1907 err_release_region:
1908         release_region(ioaddr, PCNET32_TOTAL_SIZE);
1909         return ret;
1910 }
1911
1912 /* if any allocation fails, caller must also call pcnet32_free_ring */
1913 static int pcnet32_alloc_ring(struct net_device *dev, const char *name)
1914 {
1915         struct pcnet32_private *lp = netdev_priv(dev);
1916
1917         lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
1918                                            sizeof(struct pcnet32_tx_head) *
1919                                            lp->tx_ring_size,
1920                                            &lp->tx_ring_dma_addr);
1921         if (lp->tx_ring == NULL) {
1922                 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
1923                 return -ENOMEM;
1924         }
1925
1926         lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
1927                                            sizeof(struct pcnet32_rx_head) *
1928                                            lp->rx_ring_size,
1929                                            &lp->rx_ring_dma_addr);
1930         if (lp->rx_ring == NULL) {
1931                 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
1932                 return -ENOMEM;
1933         }
1934
1935         lp->tx_dma_addr = kcalloc(lp->tx_ring_size, sizeof(dma_addr_t),
1936                                   GFP_ATOMIC);
1937         if (!lp->tx_dma_addr) {
1938                 netif_err(lp, drv, dev, "Memory allocation failed\n");
1939                 return -ENOMEM;
1940         }
1941
1942         lp->rx_dma_addr = kcalloc(lp->rx_ring_size, sizeof(dma_addr_t),
1943                                   GFP_ATOMIC);
1944         if (!lp->rx_dma_addr) {
1945                 netif_err(lp, drv, dev, "Memory allocation failed\n");
1946                 return -ENOMEM;
1947         }
1948
1949         lp->tx_skbuff = kcalloc(lp->tx_ring_size, sizeof(struct sk_buff *),
1950                                 GFP_ATOMIC);
1951         if (!lp->tx_skbuff) {
1952                 netif_err(lp, drv, dev, "Memory allocation failed\n");
1953                 return -ENOMEM;
1954         }
1955
1956         lp->rx_skbuff = kcalloc(lp->rx_ring_size, sizeof(struct sk_buff *),
1957                                 GFP_ATOMIC);
1958         if (!lp->rx_skbuff) {
1959                 netif_err(lp, drv, dev, "Memory allocation failed\n");
1960                 return -ENOMEM;
1961         }
1962
1963         return 0;
1964 }
1965
1966 static void pcnet32_free_ring(struct net_device *dev)
1967 {
1968         struct pcnet32_private *lp = netdev_priv(dev);
1969
1970         kfree(lp->tx_skbuff);
1971         lp->tx_skbuff = NULL;
1972
1973         kfree(lp->rx_skbuff);
1974         lp->rx_skbuff = NULL;
1975
1976         kfree(lp->tx_dma_addr);
1977         lp->tx_dma_addr = NULL;
1978
1979         kfree(lp->rx_dma_addr);
1980         lp->rx_dma_addr = NULL;
1981
1982         if (lp->tx_ring) {
1983                 pci_free_consistent(lp->pci_dev,
1984                                     sizeof(struct pcnet32_tx_head) *
1985                                     lp->tx_ring_size, lp->tx_ring,
1986                                     lp->tx_ring_dma_addr);
1987                 lp->tx_ring = NULL;
1988         }
1989
1990         if (lp->rx_ring) {
1991                 pci_free_consistent(lp->pci_dev,
1992                                     sizeof(struct pcnet32_rx_head) *
1993                                     lp->rx_ring_size, lp->rx_ring,
1994                                     lp->rx_ring_dma_addr);
1995                 lp->rx_ring = NULL;
1996         }
1997 }
1998
1999 static int pcnet32_open(struct net_device *dev)
2000 {
2001         struct pcnet32_private *lp = netdev_priv(dev);
2002         struct pci_dev *pdev = lp->pci_dev;
2003         unsigned long ioaddr = dev->base_addr;
2004         u16 val;
2005         int i;
2006         int rc;
2007         unsigned long flags;
2008
2009         if (request_irq(dev->irq, pcnet32_interrupt,
2010                         lp->shared_irq ? IRQF_SHARED : 0, dev->name,
2011                         (void *)dev)) {
2012                 return -EAGAIN;
2013         }
2014
2015         spin_lock_irqsave(&lp->lock, flags);
2016         /* Check for a valid station address */
2017         if (!is_valid_ether_addr(dev->dev_addr)) {
2018                 rc = -EINVAL;
2019                 goto err_free_irq;
2020         }
2021
2022         /* Reset the PCNET32 */
2023         lp->a.reset(ioaddr);
2024
2025         /* switch pcnet32 to 32bit mode */
2026         lp->a.write_bcr(ioaddr, 20, 2);
2027
2028         netif_printk(lp, ifup, KERN_DEBUG, dev,
2029                      "%s() irq %d tx/rx rings %#x/%#x init %#x\n",
2030                      __func__, dev->irq, (u32) (lp->tx_ring_dma_addr),
2031                      (u32) (lp->rx_ring_dma_addr),
2032                      (u32) (lp->init_dma_addr));
2033
2034         /* set/reset autoselect bit */
2035         val = lp->a.read_bcr(ioaddr, 2) & ~2;
2036         if (lp->options & PCNET32_PORT_ASEL)
2037                 val |= 2;
2038         lp->a.write_bcr(ioaddr, 2, val);
2039
2040         /* handle full duplex setting */
2041         if (lp->mii_if.full_duplex) {
2042                 val = lp->a.read_bcr(ioaddr, 9) & ~3;
2043                 if (lp->options & PCNET32_PORT_FD) {
2044                         val |= 1;
2045                         if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
2046                                 val |= 2;
2047                 } else if (lp->options & PCNET32_PORT_ASEL) {
2048                         /* workaround of xSeries250, turn on for 79C975 only */
2049                         if (lp->chip_version == 0x2627)
2050                                 val |= 3;
2051                 }
2052                 lp->a.write_bcr(ioaddr, 9, val);
2053         }
2054
2055         /* set/reset GPSI bit in test register */
2056         val = lp->a.read_csr(ioaddr, 124) & ~0x10;
2057         if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
2058                 val |= 0x10;
2059         lp->a.write_csr(ioaddr, 124, val);
2060
2061         /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
2062         if (pdev && pdev->subsystem_vendor == PCI_VENDOR_ID_AT &&
2063             (pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
2064              pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
2065                 if (lp->options & PCNET32_PORT_ASEL) {
2066                         lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
2067                         netif_printk(lp, link, KERN_DEBUG, dev,
2068                                      "Setting 100Mb-Full Duplex\n");
2069                 }
2070         }
2071         if (lp->phycount < 2) {
2072                 /*
2073                  * 24 Jun 2004 according AMD, in order to change the PHY,
2074                  * DANAS (or DISPM for 79C976) must be set; then select the speed,
2075                  * duplex, and/or enable auto negotiation, and clear DANAS
2076                  */
2077                 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
2078                         lp->a.write_bcr(ioaddr, 32,
2079                                         lp->a.read_bcr(ioaddr, 32) | 0x0080);
2080                         /* disable Auto Negotiation, set 10Mpbs, HD */
2081                         val = lp->a.read_bcr(ioaddr, 32) & ~0xb8;
2082                         if (lp->options & PCNET32_PORT_FD)
2083                                 val |= 0x10;
2084                         if (lp->options & PCNET32_PORT_100)
2085                                 val |= 0x08;
2086                         lp->a.write_bcr(ioaddr, 32, val);
2087                 } else {
2088                         if (lp->options & PCNET32_PORT_ASEL) {
2089                                 lp->a.write_bcr(ioaddr, 32,
2090                                                 lp->a.read_bcr(ioaddr,
2091                                                                32) | 0x0080);
2092                                 /* enable auto negotiate, setup, disable fd */
2093                                 val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
2094                                 val |= 0x20;
2095                                 lp->a.write_bcr(ioaddr, 32, val);
2096                         }
2097                 }
2098         } else {
2099                 int first_phy = -1;
2100                 u16 bmcr;
2101                 u32 bcr9;
2102                 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
2103
2104                 /*
2105                  * There is really no good other way to handle multiple PHYs
2106                  * other than turning off all automatics
2107                  */
2108                 val = lp->a.read_bcr(ioaddr, 2);
2109                 lp->a.write_bcr(ioaddr, 2, val & ~2);
2110                 val = lp->a.read_bcr(ioaddr, 32);
2111                 lp->a.write_bcr(ioaddr, 32, val & ~(1 << 7));   /* stop MII manager */
2112
2113                 if (!(lp->options & PCNET32_PORT_ASEL)) {
2114                         /* setup ecmd */
2115                         ecmd.port = PORT_MII;
2116                         ecmd.transceiver = XCVR_INTERNAL;
2117                         ecmd.autoneg = AUTONEG_DISABLE;
2118                         ethtool_cmd_speed_set(&ecmd,
2119                                               (lp->options & PCNET32_PORT_100) ?
2120                                               SPEED_100 : SPEED_10);
2121                         bcr9 = lp->a.read_bcr(ioaddr, 9);
2122
2123                         if (lp->options & PCNET32_PORT_FD) {
2124                                 ecmd.duplex = DUPLEX_FULL;
2125                                 bcr9 |= (1 << 0);
2126                         } else {
2127                                 ecmd.duplex = DUPLEX_HALF;
2128                                 bcr9 |= ~(1 << 0);
2129                         }
2130                         lp->a.write_bcr(ioaddr, 9, bcr9);
2131                 }
2132
2133                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2134                         if (lp->phymask & (1 << i)) {
2135                                 /* isolate all but the first PHY */
2136                                 bmcr = mdio_read(dev, i, MII_BMCR);
2137                                 if (first_phy == -1) {
2138                                         first_phy = i;
2139                                         mdio_write(dev, i, MII_BMCR,
2140                                                    bmcr & ~BMCR_ISOLATE);
2141                                 } else {
2142                                         mdio_write(dev, i, MII_BMCR,
2143                                                    bmcr | BMCR_ISOLATE);
2144                                 }
2145                                 /* use mii_ethtool_sset to setup PHY */
2146                                 lp->mii_if.phy_id = i;
2147                                 ecmd.phy_address = i;
2148                                 if (lp->options & PCNET32_PORT_ASEL) {
2149                                         mii_ethtool_gset(&lp->mii_if, &ecmd);
2150                                         ecmd.autoneg = AUTONEG_ENABLE;
2151                                 }
2152                                 mii_ethtool_sset(&lp->mii_if, &ecmd);
2153                         }
2154                 }
2155                 lp->mii_if.phy_id = first_phy;
2156                 netif_info(lp, link, dev, "Using PHY number %d\n", first_phy);
2157         }
2158
2159 #ifdef DO_DXSUFLO
2160         if (lp->dxsuflo) {      /* Disable transmit stop on underflow */
2161                 val = lp->a.read_csr(ioaddr, CSR3);
2162                 val |= 0x40;
2163                 lp->a.write_csr(ioaddr, CSR3, val);
2164         }
2165 #endif
2166
2167         lp->init_block->mode =
2168             cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2169         pcnet32_load_multicast(dev);
2170
2171         if (pcnet32_init_ring(dev)) {
2172                 rc = -ENOMEM;
2173                 goto err_free_ring;
2174         }
2175
2176         napi_enable(&lp->napi);
2177
2178         /* Re-initialize the PCNET32, and start it when done. */
2179         lp->a.write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
2180         lp->a.write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
2181
2182         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
2183         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2184
2185         netif_start_queue(dev);
2186
2187         if (lp->chip_version >= PCNET32_79C970A) {
2188                 /* Print the link status and start the watchdog */
2189                 pcnet32_check_media(dev, 1);
2190                 mod_timer(&lp->watchdog_timer, PCNET32_WATCHDOG_TIMEOUT);
2191         }
2192
2193         i = 0;
2194         while (i++ < 100)
2195                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2196                         break;
2197         /*
2198          * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
2199          * reports that doing so triggers a bug in the '974.
2200          */
2201         lp->a.write_csr(ioaddr, CSR0, CSR0_NORMAL);
2202
2203         netif_printk(lp, ifup, KERN_DEBUG, dev,
2204                      "pcnet32 open after %d ticks, init block %#x csr0 %4.4x\n",
2205                      i,
2206                      (u32) (lp->init_dma_addr),
2207                      lp->a.read_csr(ioaddr, CSR0));
2208
2209         spin_unlock_irqrestore(&lp->lock, flags);
2210
2211         return 0;               /* Always succeed */
2212
2213 err_free_ring:
2214         /* free any allocated skbuffs */
2215         pcnet32_purge_rx_ring(dev);
2216
2217         /*
2218          * Switch back to 16bit mode to avoid problems with dumb
2219          * DOS packet driver after a warm reboot
2220          */
2221         lp->a.write_bcr(ioaddr, 20, 4);
2222
2223 err_free_irq:
2224         spin_unlock_irqrestore(&lp->lock, flags);
2225         free_irq(dev->irq, dev);
2226         return rc;
2227 }
2228
2229 /*
2230  * The LANCE has been halted for one reason or another (busmaster memory
2231  * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
2232  * etc.).  Modern LANCE variants always reload their ring-buffer
2233  * configuration when restarted, so we must reinitialize our ring
2234  * context before restarting.  As part of this reinitialization,
2235  * find all packets still on the Tx ring and pretend that they had been
2236  * sent (in effect, drop the packets on the floor) - the higher-level
2237  * protocols will time out and retransmit.  It'd be better to shuffle
2238  * these skbs to a temp list and then actually re-Tx them after
2239  * restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
2240  */
2241
2242 static void pcnet32_purge_tx_ring(struct net_device *dev)
2243 {
2244         struct pcnet32_private *lp = netdev_priv(dev);
2245         int i;
2246
2247         for (i = 0; i < lp->tx_ring_size; i++) {
2248                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2249                 wmb();          /* Make sure adapter sees owner change */
2250                 if (lp->tx_skbuff[i]) {
2251                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
2252                                          lp->tx_skbuff[i]->len,
2253                                          PCI_DMA_TODEVICE);
2254                         dev_kfree_skb_any(lp->tx_skbuff[i]);
2255                 }
2256                 lp->tx_skbuff[i] = NULL;
2257                 lp->tx_dma_addr[i] = 0;
2258         }
2259 }
2260
2261 /* Initialize the PCNET32 Rx and Tx rings. */
2262 static int pcnet32_init_ring(struct net_device *dev)
2263 {
2264         struct pcnet32_private *lp = netdev_priv(dev);
2265         int i;
2266
2267         lp->tx_full = 0;
2268         lp->cur_rx = lp->cur_tx = 0;
2269         lp->dirty_rx = lp->dirty_tx = 0;
2270
2271         for (i = 0; i < lp->rx_ring_size; i++) {
2272                 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
2273                 if (rx_skbuff == NULL) {
2274                         lp->rx_skbuff[i] = dev_alloc_skb(PKT_BUF_SKB);
2275                         rx_skbuff = lp->rx_skbuff[i];
2276                         if (!rx_skbuff) {
2277                                 /* there is not much we can do at this point */
2278                                 netif_err(lp, drv, dev, "%s dev_alloc_skb failed\n",
2279                                           __func__);
2280                                 return -1;
2281                         }
2282                         skb_reserve(rx_skbuff, NET_IP_ALIGN);
2283                 }
2284
2285                 rmb();
2286                 if (lp->rx_dma_addr[i] == 0)
2287                         lp->rx_dma_addr[i] =
2288                             pci_map_single(lp->pci_dev, rx_skbuff->data,
2289                                            PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
2290                 lp->rx_ring[i].base = cpu_to_le32(lp->rx_dma_addr[i]);
2291                 lp->rx_ring[i].buf_length = cpu_to_le16(NEG_BUF_SIZE);
2292                 wmb();          /* Make sure owner changes after all others are visible */
2293                 lp->rx_ring[i].status = cpu_to_le16(0x8000);
2294         }
2295         /* The Tx buffer address is filled in as needed, but we do need to clear
2296          * the upper ownership bit. */
2297         for (i = 0; i < lp->tx_ring_size; i++) {
2298                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2299                 wmb();          /* Make sure adapter sees owner change */
2300                 lp->tx_ring[i].base = 0;
2301                 lp->tx_dma_addr[i] = 0;
2302         }
2303
2304         lp->init_block->tlen_rlen =
2305             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
2306         for (i = 0; i < 6; i++)
2307                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
2308         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
2309         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
2310         wmb();                  /* Make sure all changes are visible */
2311         return 0;
2312 }
2313
2314 /* the pcnet32 has been issued a stop or reset.  Wait for the stop bit
2315  * then flush the pending transmit operations, re-initialize the ring,
2316  * and tell the chip to initialize.
2317  */
2318 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
2319 {
2320         struct pcnet32_private *lp = netdev_priv(dev);
2321         unsigned long ioaddr = dev->base_addr;
2322         int i;
2323
2324         /* wait for stop */
2325         for (i = 0; i < 100; i++)
2326                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_STOP)
2327                         break;
2328
2329         if (i >= 100)
2330                 netif_err(lp, drv, dev, "%s timed out waiting for stop\n",
2331                           __func__);
2332
2333         pcnet32_purge_tx_ring(dev);
2334         if (pcnet32_init_ring(dev))
2335                 return;
2336
2337         /* ReInit Ring */
2338         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2339         i = 0;
2340         while (i++ < 1000)
2341                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2342                         break;
2343
2344         lp->a.write_csr(ioaddr, CSR0, csr0_bits);
2345 }
2346
2347 static void pcnet32_tx_timeout(struct net_device *dev)
2348 {
2349         struct pcnet32_private *lp = netdev_priv(dev);
2350         unsigned long ioaddr = dev->base_addr, flags;
2351
2352         spin_lock_irqsave(&lp->lock, flags);
2353         /* Transmitter timeout, serious problems. */
2354         if (pcnet32_debug & NETIF_MSG_DRV)
2355                 pr_err("%s: transmit timed out, status %4.4x, resetting\n",
2356                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2357         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2358         dev->stats.tx_errors++;
2359         if (netif_msg_tx_err(lp)) {
2360                 int i;
2361                 printk(KERN_DEBUG
2362                        " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
2363                        lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
2364                        lp->cur_rx);
2365                 for (i = 0; i < lp->rx_ring_size; i++)
2366                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2367                                le32_to_cpu(lp->rx_ring[i].base),
2368                                (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
2369                                0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
2370                                le16_to_cpu(lp->rx_ring[i].status));
2371                 for (i = 0; i < lp->tx_ring_size; i++)
2372                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2373                                le32_to_cpu(lp->tx_ring[i].base),
2374                                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
2375                                le32_to_cpu(lp->tx_ring[i].misc),
2376                                le16_to_cpu(lp->tx_ring[i].status));
2377                 printk("\n");
2378         }
2379         pcnet32_restart(dev, CSR0_NORMAL);
2380
2381         dev->trans_start = jiffies; /* prevent tx timeout */
2382         netif_wake_queue(dev);
2383
2384         spin_unlock_irqrestore(&lp->lock, flags);
2385 }
2386
2387 static netdev_tx_t pcnet32_start_xmit(struct sk_buff *skb,
2388                                       struct net_device *dev)
2389 {
2390         struct pcnet32_private *lp = netdev_priv(dev);
2391         unsigned long ioaddr = dev->base_addr;
2392         u16 status;
2393         int entry;
2394         unsigned long flags;
2395
2396         spin_lock_irqsave(&lp->lock, flags);
2397
2398         netif_printk(lp, tx_queued, KERN_DEBUG, dev,
2399                      "%s() called, csr0 %4.4x\n",
2400                      __func__, lp->a.read_csr(ioaddr, CSR0));
2401
2402         /* Default status -- will not enable Successful-TxDone
2403          * interrupt when that option is available to us.
2404          */
2405         status = 0x8300;
2406
2407         /* Fill in a Tx ring entry */
2408
2409         /* Mask to ring buffer boundary. */
2410         entry = lp->cur_tx & lp->tx_mod_mask;
2411
2412         /* Caution: the write order is important here, set the status
2413          * with the "ownership" bits last. */
2414
2415         lp->tx_ring[entry].length = cpu_to_le16(-skb->len);
2416
2417         lp->tx_ring[entry].misc = 0x00000000;
2418
2419         lp->tx_skbuff[entry] = skb;
2420         lp->tx_dma_addr[entry] =
2421             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2422         lp->tx_ring[entry].base = cpu_to_le32(lp->tx_dma_addr[entry]);
2423         wmb();                  /* Make sure owner changes after all others are visible */
2424         lp->tx_ring[entry].status = cpu_to_le16(status);
2425
2426         lp->cur_tx++;
2427         dev->stats.tx_bytes += skb->len;
2428
2429         /* Trigger an immediate send poll. */
2430         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_TXPOLL);
2431
2432         if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2433                 lp->tx_full = 1;
2434                 netif_stop_queue(dev);
2435         }
2436         spin_unlock_irqrestore(&lp->lock, flags);
2437         return NETDEV_TX_OK;
2438 }
2439
2440 /* The PCNET32 interrupt handler. */
2441 static irqreturn_t
2442 pcnet32_interrupt(int irq, void *dev_id)
2443 {
2444         struct net_device *dev = dev_id;
2445         struct pcnet32_private *lp;
2446         unsigned long ioaddr;
2447         u16 csr0;
2448         int boguscnt = max_interrupt_work;
2449
2450         ioaddr = dev->base_addr;
2451         lp = netdev_priv(dev);
2452
2453         spin_lock(&lp->lock);
2454
2455         csr0 = lp->a.read_csr(ioaddr, CSR0);
2456         while ((csr0 & 0x8f00) && --boguscnt >= 0) {
2457                 if (csr0 == 0xffff)
2458                         break;  /* PCMCIA remove happened */
2459                 /* Acknowledge all of the current interrupt sources ASAP. */
2460                 lp->a.write_csr(ioaddr, CSR0, csr0 & ~0x004f);
2461
2462                 netif_printk(lp, intr, KERN_DEBUG, dev,
2463                              "interrupt  csr0=%#2.2x new csr=%#2.2x\n",
2464                              csr0, lp->a.read_csr(ioaddr, CSR0));
2465
2466                 /* Log misc errors. */
2467                 if (csr0 & 0x4000)
2468                         dev->stats.tx_errors++; /* Tx babble. */
2469                 if (csr0 & 0x1000) {
2470                         /*
2471                          * This happens when our receive ring is full. This
2472                          * shouldn't be a problem as we will see normal rx
2473                          * interrupts for the frames in the receive ring.  But
2474                          * there are some PCI chipsets (I can reproduce this
2475                          * on SP3G with Intel saturn chipset) which have
2476                          * sometimes problems and will fill up the receive
2477                          * ring with error descriptors.  In this situation we
2478                          * don't get a rx interrupt, but a missed frame
2479                          * interrupt sooner or later.
2480                          */
2481                         dev->stats.rx_errors++; /* Missed a Rx frame. */
2482                 }
2483                 if (csr0 & 0x0800) {
2484                         netif_err(lp, drv, dev, "Bus master arbitration failure, status %4.4x\n",
2485                                   csr0);
2486                         /* unlike for the lance, there is no restart needed */
2487                 }
2488                 if (napi_schedule_prep(&lp->napi)) {
2489                         u16 val;
2490                         /* set interrupt masks */
2491                         val = lp->a.read_csr(ioaddr, CSR3);
2492                         val |= 0x5f00;
2493                         lp->a.write_csr(ioaddr, CSR3, val);
2494
2495                         __napi_schedule(&lp->napi);
2496                         break;
2497                 }
2498                 csr0 = lp->a.read_csr(ioaddr, CSR0);
2499         }
2500
2501         netif_printk(lp, intr, KERN_DEBUG, dev,
2502                      "exiting interrupt, csr0=%#4.4x\n",
2503                      lp->a.read_csr(ioaddr, CSR0));
2504
2505         spin_unlock(&lp->lock);
2506
2507         return IRQ_HANDLED;
2508 }
2509
2510 static int pcnet32_close(struct net_device *dev)
2511 {
2512         unsigned long ioaddr = dev->base_addr;
2513         struct pcnet32_private *lp = netdev_priv(dev);
2514         unsigned long flags;
2515
2516         del_timer_sync(&lp->watchdog_timer);
2517
2518         netif_stop_queue(dev);
2519         napi_disable(&lp->napi);
2520
2521         spin_lock_irqsave(&lp->lock, flags);
2522
2523         dev->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2524
2525         netif_printk(lp, ifdown, KERN_DEBUG, dev,
2526                      "Shutting down ethercard, status was %2.2x\n",
2527                      lp->a.read_csr(ioaddr, CSR0));
2528
2529         /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2530         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2531
2532         /*
2533          * Switch back to 16bit mode to avoid problems with dumb
2534          * DOS packet driver after a warm reboot
2535          */
2536         lp->a.write_bcr(ioaddr, 20, 4);
2537
2538         spin_unlock_irqrestore(&lp->lock, flags);
2539
2540         free_irq(dev->irq, dev);
2541
2542         spin_lock_irqsave(&lp->lock, flags);
2543
2544         pcnet32_purge_rx_ring(dev);
2545         pcnet32_purge_tx_ring(dev);
2546
2547         spin_unlock_irqrestore(&lp->lock, flags);
2548
2549         return 0;
2550 }
2551
2552 static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2553 {
2554         struct pcnet32_private *lp = netdev_priv(dev);
2555         unsigned long ioaddr = dev->base_addr;
2556         unsigned long flags;
2557
2558         spin_lock_irqsave(&lp->lock, flags);
2559         dev->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2560         spin_unlock_irqrestore(&lp->lock, flags);
2561
2562         return &dev->stats;
2563 }
2564
2565 /* taken from the sunlance driver, which it took from the depca driver */
2566 static void pcnet32_load_multicast(struct net_device *dev)
2567 {
2568         struct pcnet32_private *lp = netdev_priv(dev);
2569         volatile struct pcnet32_init_block *ib = lp->init_block;
2570         volatile __le16 *mcast_table = (__le16 *)ib->filter;
2571         struct netdev_hw_addr *ha;
2572         unsigned long ioaddr = dev->base_addr;
2573         char *addrs;
2574         int i;
2575         u32 crc;
2576
2577         /* set all multicast bits */
2578         if (dev->flags & IFF_ALLMULTI) {
2579                 ib->filter[0] = cpu_to_le32(~0U);
2580                 ib->filter[1] = cpu_to_le32(~0U);
2581                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2582                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2583                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2584                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2585                 return;
2586         }
2587         /* clear the multicast filter */
2588         ib->filter[0] = 0;
2589         ib->filter[1] = 0;
2590
2591         /* Add addresses */
2592         netdev_for_each_mc_addr(ha, dev) {
2593                 addrs = ha->addr;
2594
2595                 /* multicast address? */
2596                 if (!(*addrs & 1))
2597                         continue;
2598
2599                 crc = ether_crc_le(6, addrs);
2600                 crc = crc >> 26;
2601                 mcast_table[crc >> 4] |= cpu_to_le16(1 << (crc & 0xf));
2602         }
2603         for (i = 0; i < 4; i++)
2604                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER + i,
2605                                 le16_to_cpu(mcast_table[i]));
2606 }
2607
2608 /*
2609  * Set or clear the multicast filter for this adaptor.
2610  */
2611 static void pcnet32_set_multicast_list(struct net_device *dev)
2612 {
2613         unsigned long ioaddr = dev->base_addr, flags;
2614         struct pcnet32_private *lp = netdev_priv(dev);
2615         int csr15, suspended;
2616
2617         spin_lock_irqsave(&lp->lock, flags);
2618         suspended = pcnet32_suspend(dev, &flags, 0);
2619         csr15 = lp->a.read_csr(ioaddr, CSR15);
2620         if (dev->flags & IFF_PROMISC) {
2621                 /* Log any net taps. */
2622                 netif_info(lp, hw, dev, "Promiscuous mode enabled\n");
2623                 lp->init_block->mode =
2624                     cpu_to_le16(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2625                                 7);
2626                 lp->a.write_csr(ioaddr, CSR15, csr15 | 0x8000);
2627         } else {
2628                 lp->init_block->mode =
2629                     cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2630                 lp->a.write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2631                 pcnet32_load_multicast(dev);
2632         }
2633
2634         if (suspended) {
2635                 int csr5;
2636                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2637                 csr5 = lp->a.read_csr(ioaddr, CSR5);
2638                 lp->a.write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2639         } else {
2640                 lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2641                 pcnet32_restart(dev, CSR0_NORMAL);
2642                 netif_wake_queue(dev);
2643         }
2644
2645         spin_unlock_irqrestore(&lp->lock, flags);
2646 }
2647
2648 /* This routine assumes that the lp->lock is held */
2649 static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2650 {
2651         struct pcnet32_private *lp = netdev_priv(dev);
2652         unsigned long ioaddr = dev->base_addr;
2653         u16 val_out;
2654
2655         if (!lp->mii)
2656                 return 0;
2657
2658         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2659         val_out = lp->a.read_bcr(ioaddr, 34);
2660
2661         return val_out;
2662 }
2663
2664 /* This routine assumes that the lp->lock is held */
2665 static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2666 {
2667         struct pcnet32_private *lp = netdev_priv(dev);
2668         unsigned long ioaddr = dev->base_addr;
2669
2670         if (!lp->mii)
2671                 return;
2672
2673         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2674         lp->a.write_bcr(ioaddr, 34, val);
2675 }
2676
2677 static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2678 {
2679         struct pcnet32_private *lp = netdev_priv(dev);
2680         int rc;
2681         unsigned long flags;
2682
2683         /* SIOC[GS]MIIxxx ioctls */
2684         if (lp->mii) {
2685                 spin_lock_irqsave(&lp->lock, flags);
2686                 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2687                 spin_unlock_irqrestore(&lp->lock, flags);
2688         } else {
2689                 rc = -EOPNOTSUPP;
2690         }
2691
2692         return rc;
2693 }
2694
2695 static int pcnet32_check_otherphy(struct net_device *dev)
2696 {
2697         struct pcnet32_private *lp = netdev_priv(dev);
2698         struct mii_if_info mii = lp->mii_if;
2699         u16 bmcr;
2700         int i;
2701
2702         for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2703                 if (i == lp->mii_if.phy_id)
2704                         continue;       /* skip active phy */
2705                 if (lp->phymask & (1 << i)) {
2706                         mii.phy_id = i;
2707                         if (mii_link_ok(&mii)) {
2708                                 /* found PHY with active link */
2709                                 netif_info(lp, link, dev, "Using PHY number %d\n",
2710                                            i);
2711
2712                                 /* isolate inactive phy */
2713                                 bmcr =
2714                                     mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2715                                 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2716                                            bmcr | BMCR_ISOLATE);
2717
2718                                 /* de-isolate new phy */
2719                                 bmcr = mdio_read(dev, i, MII_BMCR);
2720                                 mdio_write(dev, i, MII_BMCR,
2721                                            bmcr & ~BMCR_ISOLATE);
2722
2723                                 /* set new phy address */
2724                                 lp->mii_if.phy_id = i;
2725                                 return 1;
2726                         }
2727                 }
2728         }
2729         return 0;
2730 }
2731
2732 /*
2733  * Show the status of the media.  Similar to mii_check_media however it
2734  * correctly shows the link speed for all (tested) pcnet32 variants.
2735  * Devices with no mii just report link state without speed.
2736  *
2737  * Caller is assumed to hold and release the lp->lock.
2738  */
2739
2740 static void pcnet32_check_media(struct net_device *dev, int verbose)
2741 {
2742         struct pcnet32_private *lp = netdev_priv(dev);
2743         int curr_link;
2744         int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2745         u32 bcr9;
2746
2747         if (lp->mii) {
2748                 curr_link = mii_link_ok(&lp->mii_if);
2749         } else {
2750                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
2751                 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2752         }
2753         if (!curr_link) {
2754                 if (prev_link || verbose) {
2755                         netif_carrier_off(dev);
2756                         netif_info(lp, link, dev, "link down\n");
2757                 }
2758                 if (lp->phycount > 1) {
2759                         curr_link = pcnet32_check_otherphy(dev);
2760                         prev_link = 0;
2761                 }
2762         } else if (verbose || !prev_link) {
2763                 netif_carrier_on(dev);
2764                 if (lp->mii) {
2765                         if (netif_msg_link(lp)) {
2766                                 struct ethtool_cmd ecmd = {
2767                                         .cmd = ETHTOOL_GSET };
2768                                 mii_ethtool_gset(&lp->mii_if, &ecmd);
2769                                 netdev_info(dev, "link up, %uMbps, %s-duplex\n",
2770                                             ethtool_cmd_speed(&ecmd),
2771                                             (ecmd.duplex == DUPLEX_FULL)
2772                                             ? "full" : "half");
2773                         }
2774                         bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2775                         if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2776                                 if (lp->mii_if.full_duplex)
2777                                         bcr9 |= (1 << 0);
2778                                 else
2779                                         bcr9 &= ~(1 << 0);
2780                                 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2781                         }
2782                 } else {
2783                         netif_info(lp, link, dev, "link up\n");
2784                 }
2785         }
2786 }
2787
2788 /*
2789  * Check for loss of link and link establishment.
2790  * Can not use mii_check_media because it does nothing if mode is forced.
2791  */
2792
2793 static void pcnet32_watchdog(struct net_device *dev)
2794 {
2795         struct pcnet32_private *lp = netdev_priv(dev);
2796         unsigned long flags;
2797
2798         /* Print the link status if it has changed */
2799         spin_lock_irqsave(&lp->lock, flags);
2800         pcnet32_check_media(dev, 0);
2801         spin_unlock_irqrestore(&lp->lock, flags);
2802
2803         mod_timer(&lp->watchdog_timer, round_jiffies(PCNET32_WATCHDOG_TIMEOUT));
2804 }
2805
2806 static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
2807 {
2808         struct net_device *dev = pci_get_drvdata(pdev);
2809
2810         if (netif_running(dev)) {
2811                 netif_device_detach(dev);
2812                 pcnet32_close(dev);
2813         }
2814         pci_save_state(pdev);
2815         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2816         return 0;
2817 }
2818
2819 static int pcnet32_pm_resume(struct pci_dev *pdev)
2820 {
2821         struct net_device *dev = pci_get_drvdata(pdev);
2822
2823         pci_set_power_state(pdev, PCI_D0);
2824         pci_restore_state(pdev);
2825
2826         if (netif_running(dev)) {
2827                 pcnet32_open(dev);
2828                 netif_device_attach(dev);
2829         }
2830         return 0;
2831 }
2832
2833 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2834 {
2835         struct net_device *dev = pci_get_drvdata(pdev);
2836
2837         if (dev) {
2838                 struct pcnet32_private *lp = netdev_priv(dev);
2839
2840                 unregister_netdev(dev);
2841                 pcnet32_free_ring(dev);
2842                 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2843                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2844                                     lp->init_block, lp->init_dma_addr);
2845                 free_netdev(dev);
2846                 pci_disable_device(pdev);
2847                 pci_set_drvdata(pdev, NULL);
2848         }
2849 }
2850
2851 static struct pci_driver pcnet32_driver = {
2852         .name = DRV_NAME,
2853         .probe = pcnet32_probe_pci,
2854         .remove = __devexit_p(pcnet32_remove_one),
2855         .id_table = pcnet32_pci_tbl,
2856         .suspend = pcnet32_pm_suspend,
2857         .resume = pcnet32_pm_resume,
2858 };
2859
2860 /* An additional parameter that may be passed in... */
2861 static int debug = -1;
2862 static int tx_start_pt = -1;
2863 static int pcnet32_have_pci;
2864
2865 module_param(debug, int, 0);
2866 MODULE_PARM_DESC(debug, DRV_NAME " debug level");
2867 module_param(max_interrupt_work, int, 0);
2868 MODULE_PARM_DESC(max_interrupt_work,
2869                  DRV_NAME " maximum events handled per interrupt");
2870 module_param(rx_copybreak, int, 0);
2871 MODULE_PARM_DESC(rx_copybreak,
2872                  DRV_NAME " copy breakpoint for copy-only-tiny-frames");
2873 module_param(tx_start_pt, int, 0);
2874 MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
2875 module_param(pcnet32vlb, int, 0);
2876 MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
2877 module_param_array(options, int, NULL, 0);
2878 MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
2879 module_param_array(full_duplex, int, NULL, 0);
2880 MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
2881 /* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
2882 module_param_array(homepna, int, NULL, 0);
2883 MODULE_PARM_DESC(homepna,
2884                  DRV_NAME
2885                  " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
2886
2887 MODULE_AUTHOR("Thomas Bogendoerfer");
2888 MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
2889 MODULE_LICENSE("GPL");
2890
2891 #define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
2892
2893 static int __init pcnet32_init_module(void)
2894 {
2895         pr_info("%s", version);
2896
2897         pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
2898
2899         if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
2900                 tx_start = tx_start_pt;
2901
2902         /* find the PCI devices */
2903         if (!pci_register_driver(&pcnet32_driver))
2904                 pcnet32_have_pci = 1;
2905
2906         /* should we find any remaining VLbus devices ? */
2907         if (pcnet32vlb)
2908                 pcnet32_probe_vlbus(pcnet32_portlist);
2909
2910         if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
2911                 pr_info("%d cards_found\n", cards_found);
2912
2913         return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
2914 }
2915
2916 static void __exit pcnet32_cleanup_module(void)
2917 {
2918         struct net_device *next_dev;
2919
2920         while (pcnet32_dev) {
2921                 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
2922                 next_dev = lp->next;
2923                 unregister_netdev(pcnet32_dev);
2924                 pcnet32_free_ring(pcnet32_dev);
2925                 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
2926                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2927                                     lp->init_block, lp->init_dma_addr);
2928                 free_netdev(pcnet32_dev);
2929                 pcnet32_dev = next_dev;
2930         }
2931
2932         if (pcnet32_have_pci)
2933                 pci_unregister_driver(&pcnet32_driver);
2934 }
2935
2936 module_init(pcnet32_init_module);
2937 module_exit(pcnet32_cleanup_module);
2938
2939 /*
2940  * Local variables:
2941  *  c-indent-level: 4
2942  *  tab-width: 8
2943  * End:
2944  */