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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
31static 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 */
64static 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
78MODULE_DEVICE_TABLE(pci, pcnet32_pci_tbl);
79
80static int cards_found;
81
82/*
83 * VLB I/O addresses
84 */
85static unsigned int pcnet32_portlist[] =
86 { 0x300, 0x320, 0x340, 0x360, 0 };
87
88static int pcnet32_debug;
89static int tx_start = 1; /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
90static int pcnet32vlb; /* check for VLB cards ? */
91
92static struct net_device *pcnet32_dev;
93
94static int max_interrupt_work = 2;
95static 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 */
116static 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
136static 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 */
145static int options[MAX_UNITS];
146static int full_duplex[MAX_UNITS];
147static 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. */
216struct 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
224struct 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. */
233struct 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 */
245struct 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 */
259struct 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 const 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
308static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
309static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
310static int pcnet32_open(struct net_device *);
311static int pcnet32_init_ring(struct net_device *);
312static netdev_tx_t pcnet32_start_xmit(struct sk_buff *,
313 struct net_device *);
314static void pcnet32_tx_timeout(struct net_device *dev);
315static irqreturn_t pcnet32_interrupt(int, void *);
316static int pcnet32_close(struct net_device *);
317static struct net_device_stats *pcnet32_get_stats(struct net_device *);
318static void pcnet32_load_multicast(struct net_device *dev);
319static void pcnet32_set_multicast_list(struct net_device *);
320static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
321static void pcnet32_watchdog(struct net_device *);
322static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
323static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
324 int val);
325static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
326static void pcnet32_ethtool_test(struct net_device *dev,
327 struct ethtool_test *eth_test, u64 * data);
328static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
329static int pcnet32_get_regs_len(struct net_device *dev);
330static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
331 void *ptr);
332static void pcnet32_purge_tx_ring(struct net_device *dev);
333static int pcnet32_alloc_ring(struct net_device *dev, const char *name);
334static void pcnet32_free_ring(struct net_device *dev);
335static void pcnet32_check_media(struct net_device *dev, int verbose);
336
337static 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
343static 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
349static 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
355static 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
361static u16 pcnet32_wio_read_rap(unsigned long addr)
362{
363 return inw(addr + PCNET32_WIO_RAP);
364}
365
366static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
367{
368 outw(val, addr + PCNET32_WIO_RAP);
369}
370
371static void pcnet32_wio_reset(unsigned long addr)
372{
373 inw(addr + PCNET32_WIO_RESET);
374}
375
376static 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
382static const 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
392static 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
398static 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
404static 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
410static 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
416static u16 pcnet32_dwio_read_rap(unsigned long addr)
417{
418 return inl(addr + PCNET32_DWIO_RAP) & 0xffff;
419}
420
421static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
422{
423 outl(val, addr + PCNET32_DWIO_RAP);
424}
425
426static void pcnet32_dwio_reset(unsigned long addr)
427{
428 inl(addr + PCNET32_DWIO_RESET);
429}
430
431static 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
437static const 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
447static 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
456static 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 */
476static 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 goto free_new_tx_ring;
501
502 new_skb_list = kcalloc(1 << size, sizeof(struct sk_buff *),
503 GFP_ATOMIC);
504 if (!new_skb_list)
505 goto free_new_lists;
506
507 kfree(lp->tx_skbuff);
508 kfree(lp->tx_dma_addr);
509 pci_free_consistent(lp->pci_dev,
510 sizeof(struct pcnet32_tx_head) *
511 lp->tx_ring_size, lp->tx_ring,
512 lp->tx_ring_dma_addr);
513
514 lp->tx_ring_size = (1 << size);
515 lp->tx_mod_mask = lp->tx_ring_size - 1;
516 lp->tx_len_bits = (size << 12);
517 lp->tx_ring = new_tx_ring;
518 lp->tx_ring_dma_addr = new_ring_dma_addr;
519 lp->tx_dma_addr = new_dma_addr_list;
520 lp->tx_skbuff = new_skb_list;
521 return;
522
523free_new_lists:
524 kfree(new_dma_addr_list);
525free_new_tx_ring:
526 pci_free_consistent(lp->pci_dev,
527 sizeof(struct pcnet32_tx_head) *
528 (1 << size),
529 new_tx_ring,
530 new_ring_dma_addr);
531}
532
533/*
534 * Allocate space for the new sized rx ring.
535 * Re-use old receive buffers.
536 * alloc extra buffers
537 * free unneeded buffers
538 * free unneeded buffers
539 * Save new resources.
540 * Any failure keeps old resources.
541 * Must be called with lp->lock held.
542 */
543static void pcnet32_realloc_rx_ring(struct net_device *dev,
544 struct pcnet32_private *lp,
545 unsigned int size)
546{
547 dma_addr_t new_ring_dma_addr;
548 dma_addr_t *new_dma_addr_list;
549 struct pcnet32_rx_head *new_rx_ring;
550 struct sk_buff **new_skb_list;
551 int new, overlap;
552 unsigned int entries = 1 << size;
553
554 new_rx_ring = pci_alloc_consistent(lp->pci_dev,
555 sizeof(struct pcnet32_rx_head) *
556 entries,
557 &new_ring_dma_addr);
558 if (new_rx_ring == NULL) {
559 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
560 return;
561 }
562 memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * entries);
563
564 new_dma_addr_list = kcalloc(entries, sizeof(dma_addr_t), GFP_ATOMIC);
565 if (!new_dma_addr_list)
566 goto free_new_rx_ring;
567
568 new_skb_list = kcalloc(entries, sizeof(struct sk_buff *), GFP_ATOMIC);
569 if (!new_skb_list)
570 goto free_new_lists;
571
572 /* first copy the current receive buffers */
573 overlap = min(entries, lp->rx_ring_size);
574 for (new = 0; new < overlap; new++) {
575 new_rx_ring[new] = lp->rx_ring[new];
576 new_dma_addr_list[new] = lp->rx_dma_addr[new];
577 new_skb_list[new] = lp->rx_skbuff[new];
578 }
579 /* now allocate any new buffers needed */
580 for (; new < entries; new++) {
581 struct sk_buff *rx_skbuff;
582 new_skb_list[new] = netdev_alloc_skb(dev, PKT_BUF_SKB);
583 rx_skbuff = new_skb_list[new];
584 if (!rx_skbuff) {
585 /* keep the original lists and buffers */
586 netif_err(lp, drv, dev, "%s netdev_alloc_skb failed\n",
587 __func__);
588 goto free_all_new;
589 }
590 skb_reserve(rx_skbuff, NET_IP_ALIGN);
591
592 new_dma_addr_list[new] =
593 pci_map_single(lp->pci_dev, rx_skbuff->data,
594 PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
595 if (pci_dma_mapping_error(lp->pci_dev,
596 new_dma_addr_list[new])) {
597 netif_err(lp, drv, dev, "%s dma mapping failed\n",
598 __func__);
599 dev_kfree_skb(new_skb_list[new]);
600 goto free_all_new;
601 }
602 new_rx_ring[new].base = cpu_to_le32(new_dma_addr_list[new]);
603 new_rx_ring[new].buf_length = cpu_to_le16(NEG_BUF_SIZE);
604 new_rx_ring[new].status = cpu_to_le16(0x8000);
605 }
606 /* and free any unneeded buffers */
607 for (; new < lp->rx_ring_size; new++) {
608 if (lp->rx_skbuff[new]) {
609 if (!pci_dma_mapping_error(lp->pci_dev,
610 lp->rx_dma_addr[new]))
611 pci_unmap_single(lp->pci_dev,
612 lp->rx_dma_addr[new],
613 PKT_BUF_SIZE,
614 PCI_DMA_FROMDEVICE);
615 dev_kfree_skb(lp->rx_skbuff[new]);
616 }
617 }
618
619 kfree(lp->rx_skbuff);
620 kfree(lp->rx_dma_addr);
621 pci_free_consistent(lp->pci_dev,
622 sizeof(struct pcnet32_rx_head) *
623 lp->rx_ring_size, lp->rx_ring,
624 lp->rx_ring_dma_addr);
625
626 lp->rx_ring_size = entries;
627 lp->rx_mod_mask = lp->rx_ring_size - 1;
628 lp->rx_len_bits = (size << 4);
629 lp->rx_ring = new_rx_ring;
630 lp->rx_ring_dma_addr = new_ring_dma_addr;
631 lp->rx_dma_addr = new_dma_addr_list;
632 lp->rx_skbuff = new_skb_list;
633 return;
634
635free_all_new:
636 while (--new >= lp->rx_ring_size) {
637 if (new_skb_list[new]) {
638 if (!pci_dma_mapping_error(lp->pci_dev,
639 new_dma_addr_list[new]))
640 pci_unmap_single(lp->pci_dev,
641 new_dma_addr_list[new],
642 PKT_BUF_SIZE,
643 PCI_DMA_FROMDEVICE);
644 dev_kfree_skb(new_skb_list[new]);
645 }
646 }
647 kfree(new_skb_list);
648free_new_lists:
649 kfree(new_dma_addr_list);
650free_new_rx_ring:
651 pci_free_consistent(lp->pci_dev,
652 sizeof(struct pcnet32_rx_head) * entries,
653 new_rx_ring,
654 new_ring_dma_addr);
655}
656
657static void pcnet32_purge_rx_ring(struct net_device *dev)
658{
659 struct pcnet32_private *lp = netdev_priv(dev);
660 int i;
661
662 /* free all allocated skbuffs */
663 for (i = 0; i < lp->rx_ring_size; i++) {
664 lp->rx_ring[i].status = 0; /* CPU owns buffer */
665 wmb(); /* Make sure adapter sees owner change */
666 if (lp->rx_skbuff[i]) {
667 if (!pci_dma_mapping_error(lp->pci_dev,
668 lp->rx_dma_addr[i]))
669 pci_unmap_single(lp->pci_dev,
670 lp->rx_dma_addr[i],
671 PKT_BUF_SIZE,
672 PCI_DMA_FROMDEVICE);
673 dev_kfree_skb_any(lp->rx_skbuff[i]);
674 }
675 lp->rx_skbuff[i] = NULL;
676 lp->rx_dma_addr[i] = 0;
677 }
678}
679
680#ifdef CONFIG_NET_POLL_CONTROLLER
681static void pcnet32_poll_controller(struct net_device *dev)
682{
683 disable_irq(dev->irq);
684 pcnet32_interrupt(0, dev);
685 enable_irq(dev->irq);
686}
687#endif
688
689static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
690{
691 struct pcnet32_private *lp = netdev_priv(dev);
692 unsigned long flags;
693 int r = -EOPNOTSUPP;
694
695 if (lp->mii) {
696 spin_lock_irqsave(&lp->lock, flags);
697 mii_ethtool_gset(&lp->mii_if, cmd);
698 spin_unlock_irqrestore(&lp->lock, flags);
699 r = 0;
700 }
701 return r;
702}
703
704static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
705{
706 struct pcnet32_private *lp = netdev_priv(dev);
707 unsigned long flags;
708 int r = -EOPNOTSUPP;
709
710 if (lp->mii) {
711 spin_lock_irqsave(&lp->lock, flags);
712 r = mii_ethtool_sset(&lp->mii_if, cmd);
713 spin_unlock_irqrestore(&lp->lock, flags);
714 }
715 return r;
716}
717
718static void pcnet32_get_drvinfo(struct net_device *dev,
719 struct ethtool_drvinfo *info)
720{
721 struct pcnet32_private *lp = netdev_priv(dev);
722
723 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
724 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
725 if (lp->pci_dev)
726 strlcpy(info->bus_info, pci_name(lp->pci_dev),
727 sizeof(info->bus_info));
728 else
729 snprintf(info->bus_info, sizeof(info->bus_info),
730 "VLB 0x%lx", dev->base_addr);
731}
732
733static u32 pcnet32_get_link(struct net_device *dev)
734{
735 struct pcnet32_private *lp = netdev_priv(dev);
736 unsigned long flags;
737 int r;
738
739 spin_lock_irqsave(&lp->lock, flags);
740 if (lp->mii) {
741 r = mii_link_ok(&lp->mii_if);
742 } else if (lp->chip_version >= PCNET32_79C970A) {
743 ulong ioaddr = dev->base_addr; /* card base I/O address */
744 r = (lp->a->read_bcr(ioaddr, 4) != 0xc0);
745 } else { /* can not detect link on really old chips */
746 r = 1;
747 }
748 spin_unlock_irqrestore(&lp->lock, flags);
749
750 return r;
751}
752
753static u32 pcnet32_get_msglevel(struct net_device *dev)
754{
755 struct pcnet32_private *lp = netdev_priv(dev);
756 return lp->msg_enable;
757}
758
759static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
760{
761 struct pcnet32_private *lp = netdev_priv(dev);
762 lp->msg_enable = value;
763}
764
765static int pcnet32_nway_reset(struct net_device *dev)
766{
767 struct pcnet32_private *lp = netdev_priv(dev);
768 unsigned long flags;
769 int r = -EOPNOTSUPP;
770
771 if (lp->mii) {
772 spin_lock_irqsave(&lp->lock, flags);
773 r = mii_nway_restart(&lp->mii_if);
774 spin_unlock_irqrestore(&lp->lock, flags);
775 }
776 return r;
777}
778
779static void pcnet32_get_ringparam(struct net_device *dev,
780 struct ethtool_ringparam *ering)
781{
782 struct pcnet32_private *lp = netdev_priv(dev);
783
784 ering->tx_max_pending = TX_MAX_RING_SIZE;
785 ering->tx_pending = lp->tx_ring_size;
786 ering->rx_max_pending = RX_MAX_RING_SIZE;
787 ering->rx_pending = lp->rx_ring_size;
788}
789
790static int pcnet32_set_ringparam(struct net_device *dev,
791 struct ethtool_ringparam *ering)
792{
793 struct pcnet32_private *lp = netdev_priv(dev);
794 unsigned long flags;
795 unsigned int size;
796 ulong ioaddr = dev->base_addr;
797 int i;
798
799 if (ering->rx_mini_pending || ering->rx_jumbo_pending)
800 return -EINVAL;
801
802 if (netif_running(dev))
803 pcnet32_netif_stop(dev);
804
805 spin_lock_irqsave(&lp->lock, flags);
806 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP); /* stop the chip */
807
808 size = min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
809
810 /* set the minimum ring size to 4, to allow the loopback test to work
811 * unchanged.
812 */
813 for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
814 if (size <= (1 << i))
815 break;
816 }
817 if ((1 << i) != lp->tx_ring_size)
818 pcnet32_realloc_tx_ring(dev, lp, i);
819
820 size = min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
821 for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
822 if (size <= (1 << i))
823 break;
824 }
825 if ((1 << i) != lp->rx_ring_size)
826 pcnet32_realloc_rx_ring(dev, lp, i);
827
828 lp->napi.weight = lp->rx_ring_size / 2;
829
830 if (netif_running(dev)) {
831 pcnet32_netif_start(dev);
832 pcnet32_restart(dev, CSR0_NORMAL);
833 }
834
835 spin_unlock_irqrestore(&lp->lock, flags);
836
837 netif_info(lp, drv, dev, "Ring Param Settings: RX: %d, TX: %d\n",
838 lp->rx_ring_size, lp->tx_ring_size);
839
840 return 0;
841}
842
843static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
844 u8 *data)
845{
846 memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
847}
848
849static int pcnet32_get_sset_count(struct net_device *dev, int sset)
850{
851 switch (sset) {
852 case ETH_SS_TEST:
853 return PCNET32_TEST_LEN;
854 default:
855 return -EOPNOTSUPP;
856 }
857}
858
859static void pcnet32_ethtool_test(struct net_device *dev,
860 struct ethtool_test *test, u64 * data)
861{
862 struct pcnet32_private *lp = netdev_priv(dev);
863 int rc;
864
865 if (test->flags == ETH_TEST_FL_OFFLINE) {
866 rc = pcnet32_loopback_test(dev, data);
867 if (rc) {
868 netif_printk(lp, hw, KERN_DEBUG, dev,
869 "Loopback test failed\n");
870 test->flags |= ETH_TEST_FL_FAILED;
871 } else
872 netif_printk(lp, hw, KERN_DEBUG, dev,
873 "Loopback test passed\n");
874 } else
875 netif_printk(lp, hw, KERN_DEBUG, dev,
876 "No tests to run (specify 'Offline' on ethtool)\n");
877} /* end pcnet32_ethtool_test */
878
879static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
880{
881 struct pcnet32_private *lp = netdev_priv(dev);
882 const struct pcnet32_access *a = lp->a; /* access to registers */
883 ulong ioaddr = dev->base_addr; /* card base I/O address */
884 struct sk_buff *skb; /* sk buff */
885 int x, i; /* counters */
886 int numbuffs = 4; /* number of TX/RX buffers and descs */
887 u16 status = 0x8300; /* TX ring status */
888 __le16 teststatus; /* test of ring status */
889 int rc; /* return code */
890 int size; /* size of packets */
891 unsigned char *packet; /* source packet data */
892 static const int data_len = 60; /* length of source packets */
893 unsigned long flags;
894 unsigned long ticks;
895
896 rc = 1; /* default to fail */
897
898 if (netif_running(dev))
899 pcnet32_netif_stop(dev);
900
901 spin_lock_irqsave(&lp->lock, flags);
902 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP); /* stop the chip */
903
904 numbuffs = min(numbuffs, (int)min(lp->rx_ring_size, lp->tx_ring_size));
905
906 /* Reset the PCNET32 */
907 lp->a->reset(ioaddr);
908 lp->a->write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
909
910 /* switch pcnet32 to 32bit mode */
911 lp->a->write_bcr(ioaddr, 20, 2);
912
913 /* purge & init rings but don't actually restart */
914 pcnet32_restart(dev, 0x0000);
915
916 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP); /* Set STOP bit */
917
918 /* Initialize Transmit buffers. */
919 size = data_len + 15;
920 for (x = 0; x < numbuffs; x++) {
921 skb = netdev_alloc_skb(dev, size);
922 if (!skb) {
923 netif_printk(lp, hw, KERN_DEBUG, dev,
924 "Cannot allocate skb at line: %d!\n",
925 __LINE__);
926 goto clean_up;
927 }
928 packet = skb->data;
929 skb_put(skb, size); /* create space for data */
930 lp->tx_skbuff[x] = skb;
931 lp->tx_ring[x].length = cpu_to_le16(-skb->len);
932 lp->tx_ring[x].misc = 0;
933
934 /* put DA and SA into the skb */
935 for (i = 0; i < 6; i++)
936 *packet++ = dev->dev_addr[i];
937 for (i = 0; i < 6; i++)
938 *packet++ = dev->dev_addr[i];
939 /* type */
940 *packet++ = 0x08;
941 *packet++ = 0x06;
942 /* packet number */
943 *packet++ = x;
944 /* fill packet with data */
945 for (i = 0; i < data_len; i++)
946 *packet++ = i;
947
948 lp->tx_dma_addr[x] =
949 pci_map_single(lp->pci_dev, skb->data, skb->len,
950 PCI_DMA_TODEVICE);
951 if (pci_dma_mapping_error(lp->pci_dev, lp->tx_dma_addr[x])) {
952 netif_printk(lp, hw, KERN_DEBUG, dev,
953 "DMA mapping error at line: %d!\n",
954 __LINE__);
955 goto clean_up;
956 }
957 lp->tx_ring[x].base = cpu_to_le32(lp->tx_dma_addr[x]);
958 wmb(); /* Make sure owner changes after all others are visible */
959 lp->tx_ring[x].status = cpu_to_le16(status);
960 }
961
962 x = a->read_bcr(ioaddr, 32); /* set internal loopback in BCR32 */
963 a->write_bcr(ioaddr, 32, x | 0x0002);
964
965 /* set int loopback in CSR15 */
966 x = a->read_csr(ioaddr, CSR15) & 0xfffc;
967 lp->a->write_csr(ioaddr, CSR15, x | 0x0044);
968
969 teststatus = cpu_to_le16(0x8000);
970 lp->a->write_csr(ioaddr, CSR0, CSR0_START); /* Set STRT bit */
971
972 /* Check status of descriptors */
973 for (x = 0; x < numbuffs; x++) {
974 ticks = 0;
975 rmb();
976 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
977 spin_unlock_irqrestore(&lp->lock, flags);
978 msleep(1);
979 spin_lock_irqsave(&lp->lock, flags);
980 rmb();
981 ticks++;
982 }
983 if (ticks == 200) {
984 netif_err(lp, hw, dev, "Desc %d failed to reset!\n", x);
985 break;
986 }
987 }
988
989 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP); /* Set STOP bit */
990 wmb();
991 if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
992 netdev_printk(KERN_DEBUG, dev, "RX loopback packets:\n");
993
994 for (x = 0; x < numbuffs; x++) {
995 netdev_printk(KERN_DEBUG, dev, "Packet %d: ", x);
996 skb = lp->rx_skbuff[x];
997 for (i = 0; i < size; i++)
998 pr_cont(" %02x", *(skb->data + i));
999 pr_cont("\n");
1000 }
1001 }
1002
1003 x = 0;
1004 rc = 0;
1005 while (x < numbuffs && !rc) {
1006 skb = lp->rx_skbuff[x];
1007 packet = lp->tx_skbuff[x]->data;
1008 for (i = 0; i < size; i++) {
1009 if (*(skb->data + i) != packet[i]) {
1010 netif_printk(lp, hw, KERN_DEBUG, dev,
1011 "Error in compare! %2x - %02x %02x\n",
1012 i, *(skb->data + i), packet[i]);
1013 rc = 1;
1014 break;
1015 }
1016 }
1017 x++;
1018 }
1019
1020clean_up:
1021 *data1 = rc;
1022 pcnet32_purge_tx_ring(dev);
1023
1024 x = a->read_csr(ioaddr, CSR15);
1025 a->write_csr(ioaddr, CSR15, (x & ~0x0044)); /* reset bits 6 and 2 */
1026
1027 x = a->read_bcr(ioaddr, 32); /* reset internal loopback */
1028 a->write_bcr(ioaddr, 32, (x & ~0x0002));
1029
1030 if (netif_running(dev)) {
1031 pcnet32_netif_start(dev);
1032 pcnet32_restart(dev, CSR0_NORMAL);
1033 } else {
1034 pcnet32_purge_rx_ring(dev);
1035 lp->a->write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1036 }
1037 spin_unlock_irqrestore(&lp->lock, flags);
1038
1039 return rc;
1040} /* end pcnet32_loopback_test */
1041
1042static int pcnet32_set_phys_id(struct net_device *dev,
1043 enum ethtool_phys_id_state state)
1044{
1045 struct pcnet32_private *lp = netdev_priv(dev);
1046 const struct pcnet32_access *a = lp->a;
1047 ulong ioaddr = dev->base_addr;
1048 unsigned long flags;
1049 int i;
1050
1051 switch (state) {
1052 case ETHTOOL_ID_ACTIVE:
1053 /* Save the current value of the bcrs */
1054 spin_lock_irqsave(&lp->lock, flags);
1055 for (i = 4; i < 8; i++)
1056 lp->save_regs[i - 4] = a->read_bcr(ioaddr, i);
1057 spin_unlock_irqrestore(&lp->lock, flags);
1058 return 2; /* cycle on/off twice per second */
1059
1060 case ETHTOOL_ID_ON:
1061 case ETHTOOL_ID_OFF:
1062 /* Blink the led */
1063 spin_lock_irqsave(&lp->lock, flags);
1064 for (i = 4; i < 8; i++)
1065 a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
1066 spin_unlock_irqrestore(&lp->lock, flags);
1067 break;
1068
1069 case ETHTOOL_ID_INACTIVE:
1070 /* Restore the original value of the bcrs */
1071 spin_lock_irqsave(&lp->lock, flags);
1072 for (i = 4; i < 8; i++)
1073 a->write_bcr(ioaddr, i, lp->save_regs[i - 4]);
1074 spin_unlock_irqrestore(&lp->lock, flags);
1075 }
1076 return 0;
1077}
1078
1079/*
1080 * lp->lock must be held.
1081 */
1082static int pcnet32_suspend(struct net_device *dev, unsigned long *flags,
1083 int can_sleep)
1084{
1085 int csr5;
1086 struct pcnet32_private *lp = netdev_priv(dev);
1087 const struct pcnet32_access *a = lp->a;
1088 ulong ioaddr = dev->base_addr;
1089 int ticks;
1090
1091 /* really old chips have to be stopped. */
1092 if (lp->chip_version < PCNET32_79C970A)
1093 return 0;
1094
1095 /* set SUSPEND (SPND) - CSR5 bit 0 */
1096 csr5 = a->read_csr(ioaddr, CSR5);
1097 a->write_csr(ioaddr, CSR5, csr5 | CSR5_SUSPEND);
1098
1099 /* poll waiting for bit to be set */
1100 ticks = 0;
1101 while (!(a->read_csr(ioaddr, CSR5) & CSR5_SUSPEND)) {
1102 spin_unlock_irqrestore(&lp->lock, *flags);
1103 if (can_sleep)
1104 msleep(1);
1105 else
1106 mdelay(1);
1107 spin_lock_irqsave(&lp->lock, *flags);
1108 ticks++;
1109 if (ticks > 200) {
1110 netif_printk(lp, hw, KERN_DEBUG, dev,
1111 "Error getting into suspend!\n");
1112 return 0;
1113 }
1114 }
1115 return 1;
1116}
1117
1118/*
1119 * process one receive descriptor entry
1120 */
1121
1122static void pcnet32_rx_entry(struct net_device *dev,
1123 struct pcnet32_private *lp,
1124 struct pcnet32_rx_head *rxp,
1125 int entry)
1126{
1127 int status = (short)le16_to_cpu(rxp->status) >> 8;
1128 int rx_in_place = 0;
1129 struct sk_buff *skb;
1130 short pkt_len;
1131
1132 if (status != 0x03) { /* There was an error. */
1133 /*
1134 * There is a tricky error noted by John Murphy,
1135 * <murf@perftech.com> to Russ Nelson: Even with full-sized
1136 * buffers it's possible for a jabber packet to use two
1137 * buffers, with only the last correctly noting the error.
1138 */
1139 if (status & 0x01) /* Only count a general error at the */
1140 dev->stats.rx_errors++; /* end of a packet. */
1141 if (status & 0x20)
1142 dev->stats.rx_frame_errors++;
1143 if (status & 0x10)
1144 dev->stats.rx_over_errors++;
1145 if (status & 0x08)
1146 dev->stats.rx_crc_errors++;
1147 if (status & 0x04)
1148 dev->stats.rx_fifo_errors++;
1149 return;
1150 }
1151
1152 pkt_len = (le32_to_cpu(rxp->msg_length) & 0xfff) - 4;
1153
1154 /* Discard oversize frames. */
1155 if (unlikely(pkt_len > PKT_BUF_SIZE)) {
1156 netif_err(lp, drv, dev, "Impossible packet size %d!\n",
1157 pkt_len);
1158 dev->stats.rx_errors++;
1159 return;
1160 }
1161 if (pkt_len < 60) {
1162 netif_err(lp, rx_err, dev, "Runt packet!\n");
1163 dev->stats.rx_errors++;
1164 return;
1165 }
1166
1167 if (pkt_len > rx_copybreak) {
1168 struct sk_buff *newskb;
1169 dma_addr_t new_dma_addr;
1170
1171 newskb = netdev_alloc_skb(dev, PKT_BUF_SKB);
1172 /*
1173 * map the new buffer, if mapping fails, drop the packet and
1174 * reuse the old buffer
1175 */
1176 if (newskb) {
1177 skb_reserve(newskb, NET_IP_ALIGN);
1178 new_dma_addr = pci_map_single(lp->pci_dev,
1179 newskb->data,
1180 PKT_BUF_SIZE,
1181 PCI_DMA_FROMDEVICE);
1182 if (pci_dma_mapping_error(lp->pci_dev, new_dma_addr)) {
1183 netif_err(lp, rx_err, dev,
1184 "DMA mapping error.\n");
1185 dev_kfree_skb(newskb);
1186 skb = NULL;
1187 } else {
1188 skb = lp->rx_skbuff[entry];
1189 pci_unmap_single(lp->pci_dev,
1190 lp->rx_dma_addr[entry],
1191 PKT_BUF_SIZE,
1192 PCI_DMA_FROMDEVICE);
1193 skb_put(skb, pkt_len);
1194 lp->rx_skbuff[entry] = newskb;
1195 lp->rx_dma_addr[entry] = new_dma_addr;
1196 rxp->base = cpu_to_le32(new_dma_addr);
1197 rx_in_place = 1;
1198 }
1199 } else
1200 skb = NULL;
1201 } else
1202 skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN);
1203
1204 if (skb == NULL) {
1205 dev->stats.rx_dropped++;
1206 return;
1207 }
1208 if (!rx_in_place) {
1209 skb_reserve(skb, NET_IP_ALIGN);
1210 skb_put(skb, pkt_len); /* Make room */
1211 pci_dma_sync_single_for_cpu(lp->pci_dev,
1212 lp->rx_dma_addr[entry],
1213 pkt_len,
1214 PCI_DMA_FROMDEVICE);
1215 skb_copy_to_linear_data(skb,
1216 (unsigned char *)(lp->rx_skbuff[entry]->data),
1217 pkt_len);
1218 pci_dma_sync_single_for_device(lp->pci_dev,
1219 lp->rx_dma_addr[entry],
1220 pkt_len,
1221 PCI_DMA_FROMDEVICE);
1222 }
1223 dev->stats.rx_bytes += skb->len;
1224 skb->protocol = eth_type_trans(skb, dev);
1225 netif_receive_skb(skb);
1226 dev->stats.rx_packets++;
1227}
1228
1229static int pcnet32_rx(struct net_device *dev, int budget)
1230{
1231 struct pcnet32_private *lp = netdev_priv(dev);
1232 int entry = lp->cur_rx & lp->rx_mod_mask;
1233 struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
1234 int npackets = 0;
1235
1236 /* If we own the next entry, it's a new packet. Send it up. */
1237 while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
1238 pcnet32_rx_entry(dev, lp, rxp, entry);
1239 npackets += 1;
1240 /*
1241 * The docs say that the buffer length isn't touched, but Andrew
1242 * Boyd of QNX reports that some revs of the 79C965 clear it.
1243 */
1244 rxp->buf_length = cpu_to_le16(NEG_BUF_SIZE);
1245 wmb(); /* Make sure owner changes after others are visible */
1246 rxp->status = cpu_to_le16(0x8000);
1247 entry = (++lp->cur_rx) & lp->rx_mod_mask;
1248 rxp = &lp->rx_ring[entry];
1249 }
1250
1251 return npackets;
1252}
1253
1254static int pcnet32_tx(struct net_device *dev)
1255{
1256 struct pcnet32_private *lp = netdev_priv(dev);
1257 unsigned int dirty_tx = lp->dirty_tx;
1258 int delta;
1259 int must_restart = 0;
1260
1261 while (dirty_tx != lp->cur_tx) {
1262 int entry = dirty_tx & lp->tx_mod_mask;
1263 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
1264
1265 if (status < 0)
1266 break; /* It still hasn't been Txed */
1267
1268 lp->tx_ring[entry].base = 0;
1269
1270 if (status & 0x4000) {
1271 /* There was a major error, log it. */
1272 int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
1273 dev->stats.tx_errors++;
1274 netif_err(lp, tx_err, dev,
1275 "Tx error status=%04x err_status=%08x\n",
1276 status, err_status);
1277 if (err_status & 0x04000000)
1278 dev->stats.tx_aborted_errors++;
1279 if (err_status & 0x08000000)
1280 dev->stats.tx_carrier_errors++;
1281 if (err_status & 0x10000000)
1282 dev->stats.tx_window_errors++;
1283#ifndef DO_DXSUFLO
1284 if (err_status & 0x40000000) {
1285 dev->stats.tx_fifo_errors++;
1286 /* Ackk! On FIFO errors the Tx unit is turned off! */
1287 /* Remove this verbosity later! */
1288 netif_err(lp, tx_err, dev, "Tx FIFO error!\n");
1289 must_restart = 1;
1290 }
1291#else
1292 if (err_status & 0x40000000) {
1293 dev->stats.tx_fifo_errors++;
1294 if (!lp->dxsuflo) { /* If controller doesn't recover ... */
1295 /* Ackk! On FIFO errors the Tx unit is turned off! */
1296 /* Remove this verbosity later! */
1297 netif_err(lp, tx_err, dev, "Tx FIFO error!\n");
1298 must_restart = 1;
1299 }
1300 }
1301#endif
1302 } else {
1303 if (status & 0x1800)
1304 dev->stats.collisions++;
1305 dev->stats.tx_packets++;
1306 }
1307
1308 /* We must free the original skb */
1309 if (lp->tx_skbuff[entry]) {
1310 pci_unmap_single(lp->pci_dev,
1311 lp->tx_dma_addr[entry],
1312 lp->tx_skbuff[entry]->
1313 len, PCI_DMA_TODEVICE);
1314 dev_kfree_skb_any(lp->tx_skbuff[entry]);
1315 lp->tx_skbuff[entry] = NULL;
1316 lp->tx_dma_addr[entry] = 0;
1317 }
1318 dirty_tx++;
1319 }
1320
1321 delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
1322 if (delta > lp->tx_ring_size) {
1323 netif_err(lp, drv, dev, "out-of-sync dirty pointer, %d vs. %d, full=%d\n",
1324 dirty_tx, lp->cur_tx, lp->tx_full);
1325 dirty_tx += lp->tx_ring_size;
1326 delta -= lp->tx_ring_size;
1327 }
1328
1329 if (lp->tx_full &&
1330 netif_queue_stopped(dev) &&
1331 delta < lp->tx_ring_size - 2) {
1332 /* The ring is no longer full, clear tbusy. */
1333 lp->tx_full = 0;
1334 netif_wake_queue(dev);
1335 }
1336 lp->dirty_tx = dirty_tx;
1337
1338 return must_restart;
1339}
1340
1341static int pcnet32_poll(struct napi_struct *napi, int budget)
1342{
1343 struct pcnet32_private *lp = container_of(napi, struct pcnet32_private, napi);
1344 struct net_device *dev = lp->dev;
1345 unsigned long ioaddr = dev->base_addr;
1346 unsigned long flags;
1347 int work_done;
1348 u16 val;
1349
1350 work_done = pcnet32_rx(dev, budget);
1351
1352 spin_lock_irqsave(&lp->lock, flags);
1353 if (pcnet32_tx(dev)) {
1354 /* reset the chip to clear the error condition, then restart */
1355 lp->a->reset(ioaddr);
1356 lp->a->write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
1357 pcnet32_restart(dev, CSR0_START);
1358 netif_wake_queue(dev);
1359 }
1360 spin_unlock_irqrestore(&lp->lock, flags);
1361
1362 if (work_done < budget) {
1363 spin_lock_irqsave(&lp->lock, flags);
1364
1365 __napi_complete(napi);
1366
1367 /* clear interrupt masks */
1368 val = lp->a->read_csr(ioaddr, CSR3);
1369 val &= 0x00ff;
1370 lp->a->write_csr(ioaddr, CSR3, val);
1371
1372 /* Set interrupt enable. */
1373 lp->a->write_csr(ioaddr, CSR0, CSR0_INTEN);
1374
1375 spin_unlock_irqrestore(&lp->lock, flags);
1376 }
1377 return work_done;
1378}
1379
1380#define PCNET32_REGS_PER_PHY 32
1381#define PCNET32_MAX_PHYS 32
1382static int pcnet32_get_regs_len(struct net_device *dev)
1383{
1384 struct pcnet32_private *lp = netdev_priv(dev);
1385 int j = lp->phycount * PCNET32_REGS_PER_PHY;
1386
1387 return (PCNET32_NUM_REGS + j) * sizeof(u16);
1388}
1389
1390static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1391 void *ptr)
1392{
1393 int i, csr0;
1394 u16 *buff = ptr;
1395 struct pcnet32_private *lp = netdev_priv(dev);
1396 const struct pcnet32_access *a = lp->a;
1397 ulong ioaddr = dev->base_addr;
1398 unsigned long flags;
1399
1400 spin_lock_irqsave(&lp->lock, flags);
1401
1402 csr0 = a->read_csr(ioaddr, CSR0);
1403 if (!(csr0 & CSR0_STOP)) /* If not stopped */
1404 pcnet32_suspend(dev, &flags, 1);
1405
1406 /* read address PROM */
1407 for (i = 0; i < 16; i += 2)
1408 *buff++ = inw(ioaddr + i);
1409
1410 /* read control and status registers */
1411 for (i = 0; i < 90; i++)
1412 *buff++ = a->read_csr(ioaddr, i);
1413
1414 *buff++ = a->read_csr(ioaddr, 112);
1415 *buff++ = a->read_csr(ioaddr, 114);
1416
1417 /* read bus configuration registers */
1418 for (i = 0; i < 30; i++)
1419 *buff++ = a->read_bcr(ioaddr, i);
1420
1421 *buff++ = 0; /* skip bcr30 so as not to hang 79C976 */
1422
1423 for (i = 31; i < 36; i++)
1424 *buff++ = a->read_bcr(ioaddr, i);
1425
1426 /* read mii phy registers */
1427 if (lp->mii) {
1428 int j;
1429 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
1430 if (lp->phymask & (1 << j)) {
1431 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
1432 lp->a->write_bcr(ioaddr, 33,
1433 (j << 5) | i);
1434 *buff++ = lp->a->read_bcr(ioaddr, 34);
1435 }
1436 }
1437 }
1438 }
1439
1440 if (!(csr0 & CSR0_STOP)) { /* If not stopped */
1441 int csr5;
1442
1443 /* clear SUSPEND (SPND) - CSR5 bit 0 */
1444 csr5 = a->read_csr(ioaddr, CSR5);
1445 a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
1446 }
1447
1448 spin_unlock_irqrestore(&lp->lock, flags);
1449}
1450
1451static const struct ethtool_ops pcnet32_ethtool_ops = {
1452 .get_settings = pcnet32_get_settings,
1453 .set_settings = pcnet32_set_settings,
1454 .get_drvinfo = pcnet32_get_drvinfo,
1455 .get_msglevel = pcnet32_get_msglevel,
1456 .set_msglevel = pcnet32_set_msglevel,
1457 .nway_reset = pcnet32_nway_reset,
1458 .get_link = pcnet32_get_link,
1459 .get_ringparam = pcnet32_get_ringparam,
1460 .set_ringparam = pcnet32_set_ringparam,
1461 .get_strings = pcnet32_get_strings,
1462 .self_test = pcnet32_ethtool_test,
1463 .set_phys_id = pcnet32_set_phys_id,
1464 .get_regs_len = pcnet32_get_regs_len,
1465 .get_regs = pcnet32_get_regs,
1466 .get_sset_count = pcnet32_get_sset_count,
1467};
1468
1469/* only probes for non-PCI devices, the rest are handled by
1470 * pci_register_driver via pcnet32_probe_pci */
1471
1472static void pcnet32_probe_vlbus(unsigned int *pcnet32_portlist)
1473{
1474 unsigned int *port, ioaddr;
1475
1476 /* search for PCnet32 VLB cards at known addresses */
1477 for (port = pcnet32_portlist; (ioaddr = *port); port++) {
1478 if (request_region
1479 (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
1480 /* check if there is really a pcnet chip on that ioaddr */
1481 if ((inb(ioaddr + 14) == 0x57) &&
1482 (inb(ioaddr + 15) == 0x57)) {
1483 pcnet32_probe1(ioaddr, 0, NULL);
1484 } else {
1485 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1486 }
1487 }
1488 }
1489}
1490
1491static int
1492pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
1493{
1494 unsigned long ioaddr;
1495 int err;
1496
1497 err = pci_enable_device(pdev);
1498 if (err < 0) {
1499 if (pcnet32_debug & NETIF_MSG_PROBE)
1500 pr_err("failed to enable device -- err=%d\n", err);
1501 return err;
1502 }
1503 pci_set_master(pdev);
1504
1505 ioaddr = pci_resource_start(pdev, 0);
1506 if (!ioaddr) {
1507 if (pcnet32_debug & NETIF_MSG_PROBE)
1508 pr_err("card has no PCI IO resources, aborting\n");
1509 return -ENODEV;
1510 }
1511
1512 if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1513 if (pcnet32_debug & NETIF_MSG_PROBE)
1514 pr_err("architecture does not support 32bit PCI busmaster DMA\n");
1515 return -ENODEV;
1516 }
1517 if (!request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci")) {
1518 if (pcnet32_debug & NETIF_MSG_PROBE)
1519 pr_err("io address range already allocated\n");
1520 return -EBUSY;
1521 }
1522
1523 err = pcnet32_probe1(ioaddr, 1, pdev);
1524 if (err < 0)
1525 pci_disable_device(pdev);
1526
1527 return err;
1528}
1529
1530static const struct net_device_ops pcnet32_netdev_ops = {
1531 .ndo_open = pcnet32_open,
1532 .ndo_stop = pcnet32_close,
1533 .ndo_start_xmit = pcnet32_start_xmit,
1534 .ndo_tx_timeout = pcnet32_tx_timeout,
1535 .ndo_get_stats = pcnet32_get_stats,
1536 .ndo_set_rx_mode = pcnet32_set_multicast_list,
1537 .ndo_do_ioctl = pcnet32_ioctl,
1538 .ndo_change_mtu = eth_change_mtu,
1539 .ndo_set_mac_address = eth_mac_addr,
1540 .ndo_validate_addr = eth_validate_addr,
1541#ifdef CONFIG_NET_POLL_CONTROLLER
1542 .ndo_poll_controller = pcnet32_poll_controller,
1543#endif
1544};
1545
1546/* pcnet32_probe1
1547 * Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1548 * pdev will be NULL when called from pcnet32_probe_vlbus.
1549 */
1550static int
1551pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1552{
1553 struct pcnet32_private *lp;
1554 int i, media;
1555 int fdx, mii, fset, dxsuflo;
1556 int chip_version;
1557 char *chipname;
1558 struct net_device *dev;
1559 const struct pcnet32_access *a = NULL;
1560 u8 promaddr[ETH_ALEN];
1561 int ret = -ENODEV;
1562
1563 /* reset the chip */
1564 pcnet32_wio_reset(ioaddr);
1565
1566 /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1567 if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1568 a = &pcnet32_wio;
1569 } else {
1570 pcnet32_dwio_reset(ioaddr);
1571 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4 &&
1572 pcnet32_dwio_check(ioaddr)) {
1573 a = &pcnet32_dwio;
1574 } else {
1575 if (pcnet32_debug & NETIF_MSG_PROBE)
1576 pr_err("No access methods\n");
1577 goto err_release_region;
1578 }
1579 }
1580
1581 chip_version =
1582 a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1583 if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1584 pr_info(" PCnet chip version is %#x\n", chip_version);
1585 if ((chip_version & 0xfff) != 0x003) {
1586 if (pcnet32_debug & NETIF_MSG_PROBE)
1587 pr_info("Unsupported chip version\n");
1588 goto err_release_region;
1589 }
1590
1591 /* initialize variables */
1592 fdx = mii = fset = dxsuflo = 0;
1593 chip_version = (chip_version >> 12) & 0xffff;
1594
1595 switch (chip_version) {
1596 case 0x2420:
1597 chipname = "PCnet/PCI 79C970"; /* PCI */
1598 break;
1599 case 0x2430:
1600 if (shared)
1601 chipname = "PCnet/PCI 79C970"; /* 970 gives the wrong chip id back */
1602 else
1603 chipname = "PCnet/32 79C965"; /* 486/VL bus */
1604 break;
1605 case 0x2621:
1606 chipname = "PCnet/PCI II 79C970A"; /* PCI */
1607 fdx = 1;
1608 break;
1609 case 0x2623:
1610 chipname = "PCnet/FAST 79C971"; /* PCI */
1611 fdx = 1;
1612 mii = 1;
1613 fset = 1;
1614 break;
1615 case 0x2624:
1616 chipname = "PCnet/FAST+ 79C972"; /* PCI */
1617 fdx = 1;
1618 mii = 1;
1619 fset = 1;
1620 break;
1621 case 0x2625:
1622 chipname = "PCnet/FAST III 79C973"; /* PCI */
1623 fdx = 1;
1624 mii = 1;
1625 break;
1626 case 0x2626:
1627 chipname = "PCnet/Home 79C978"; /* PCI */
1628 fdx = 1;
1629 /*
1630 * This is based on specs published at www.amd.com. This section
1631 * assumes that a card with a 79C978 wants to go into standard
1632 * ethernet mode. The 79C978 can also go into 1Mb HomePNA mode,
1633 * and the module option homepna=1 can select this instead.
1634 */
1635 media = a->read_bcr(ioaddr, 49);
1636 media &= ~3; /* default to 10Mb ethernet */
1637 if (cards_found < MAX_UNITS && homepna[cards_found])
1638 media |= 1; /* switch to home wiring mode */
1639 if (pcnet32_debug & NETIF_MSG_PROBE)
1640 printk(KERN_DEBUG PFX "media set to %sMbit mode\n",
1641 (media & 1) ? "1" : "10");
1642 a->write_bcr(ioaddr, 49, media);
1643 break;
1644 case 0x2627:
1645 chipname = "PCnet/FAST III 79C975"; /* PCI */
1646 fdx = 1;
1647 mii = 1;
1648 break;
1649 case 0x2628:
1650 chipname = "PCnet/PRO 79C976";
1651 fdx = 1;
1652 mii = 1;
1653 break;
1654 default:
1655 if (pcnet32_debug & NETIF_MSG_PROBE)
1656 pr_info("PCnet version %#x, no PCnet32 chip\n",
1657 chip_version);
1658 goto err_release_region;
1659 }
1660
1661 /*
1662 * On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1663 * starting until the packet is loaded. Strike one for reliability, lose
1664 * one for latency - although on PCI this isn't a big loss. Older chips
1665 * have FIFO's smaller than a packet, so you can't do this.
1666 * Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1667 */
1668
1669 if (fset) {
1670 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1671 a->write_csr(ioaddr, 80,
1672 (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1673 dxsuflo = 1;
1674 }
1675
1676 dev = alloc_etherdev(sizeof(*lp));
1677 if (!dev) {
1678 ret = -ENOMEM;
1679 goto err_release_region;
1680 }
1681
1682 if (pdev)
1683 SET_NETDEV_DEV(dev, &pdev->dev);
1684
1685 if (pcnet32_debug & NETIF_MSG_PROBE)
1686 pr_info("%s at %#3lx,", chipname, ioaddr);
1687
1688 /* In most chips, after a chip reset, the ethernet address is read from the
1689 * station address PROM at the base address and programmed into the
1690 * "Physical Address Registers" CSR12-14.
1691 * As a precautionary measure, we read the PROM values and complain if
1692 * they disagree with the CSRs. If they miscompare, and the PROM addr
1693 * is valid, then the PROM addr is used.
1694 */
1695 for (i = 0; i < 3; i++) {
1696 unsigned int val;
1697 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1698 /* There may be endianness issues here. */
1699 dev->dev_addr[2 * i] = val & 0x0ff;
1700 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1701 }
1702
1703 /* read PROM address and compare with CSR address */
1704 for (i = 0; i < ETH_ALEN; i++)
1705 promaddr[i] = inb(ioaddr + i);
1706
1707 if (!ether_addr_equal(promaddr, dev->dev_addr) ||
1708 !is_valid_ether_addr(dev->dev_addr)) {
1709 if (is_valid_ether_addr(promaddr)) {
1710 if (pcnet32_debug & NETIF_MSG_PROBE) {
1711 pr_cont(" warning: CSR address invalid,\n");
1712 pr_info(" using instead PROM address of");
1713 }
1714 memcpy(dev->dev_addr, promaddr, ETH_ALEN);
1715 }
1716 }
1717
1718 /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1719 if (!is_valid_ether_addr(dev->dev_addr))
1720 memset(dev->dev_addr, 0, ETH_ALEN);
1721
1722 if (pcnet32_debug & NETIF_MSG_PROBE) {
1723 pr_cont(" %pM", dev->dev_addr);
1724
1725 /* Version 0x2623 and 0x2624 */
1726 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1727 i = a->read_csr(ioaddr, 80) & 0x0C00; /* Check tx_start_pt */
1728 pr_info(" tx_start_pt(0x%04x):", i);
1729 switch (i >> 10) {
1730 case 0:
1731 pr_cont(" 20 bytes,");
1732 break;
1733 case 1:
1734 pr_cont(" 64 bytes,");
1735 break;
1736 case 2:
1737 pr_cont(" 128 bytes,");
1738 break;
1739 case 3:
1740 pr_cont("~220 bytes,");
1741 break;
1742 }
1743 i = a->read_bcr(ioaddr, 18); /* Check Burst/Bus control */
1744 pr_cont(" BCR18(%x):", i & 0xffff);
1745 if (i & (1 << 5))
1746 pr_cont("BurstWrEn ");
1747 if (i & (1 << 6))
1748 pr_cont("BurstRdEn ");
1749 if (i & (1 << 7))
1750 pr_cont("DWordIO ");
1751 if (i & (1 << 11))
1752 pr_cont("NoUFlow ");
1753 i = a->read_bcr(ioaddr, 25);
1754 pr_info(" SRAMSIZE=0x%04x,", i << 8);
1755 i = a->read_bcr(ioaddr, 26);
1756 pr_cont(" SRAM_BND=0x%04x,", i << 8);
1757 i = a->read_bcr(ioaddr, 27);
1758 if (i & (1 << 14))
1759 pr_cont("LowLatRx");
1760 }
1761 }
1762
1763 dev->base_addr = ioaddr;
1764 lp = netdev_priv(dev);
1765 /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1766 lp->init_block = pci_alloc_consistent(pdev, sizeof(*lp->init_block),
1767 &lp->init_dma_addr);
1768 if (!lp->init_block) {
1769 if (pcnet32_debug & NETIF_MSG_PROBE)
1770 pr_err("Consistent memory allocation failed\n");
1771 ret = -ENOMEM;
1772 goto err_free_netdev;
1773 }
1774 lp->pci_dev = pdev;
1775
1776 lp->dev = dev;
1777
1778 spin_lock_init(&lp->lock);
1779
1780 lp->name = chipname;
1781 lp->shared_irq = shared;
1782 lp->tx_ring_size = TX_RING_SIZE; /* default tx ring size */
1783 lp->rx_ring_size = RX_RING_SIZE; /* default rx ring size */
1784 lp->tx_mod_mask = lp->tx_ring_size - 1;
1785 lp->rx_mod_mask = lp->rx_ring_size - 1;
1786 lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1787 lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1788 lp->mii_if.full_duplex = fdx;
1789 lp->mii_if.phy_id_mask = 0x1f;
1790 lp->mii_if.reg_num_mask = 0x1f;
1791 lp->dxsuflo = dxsuflo;
1792 lp->mii = mii;
1793 lp->chip_version = chip_version;
1794 lp->msg_enable = pcnet32_debug;
1795 if ((cards_found >= MAX_UNITS) ||
1796 (options[cards_found] >= sizeof(options_mapping)))
1797 lp->options = PCNET32_PORT_ASEL;
1798 else
1799 lp->options = options_mapping[options[cards_found]];
1800 lp->mii_if.dev = dev;
1801 lp->mii_if.mdio_read = mdio_read;
1802 lp->mii_if.mdio_write = mdio_write;
1803
1804 /* napi.weight is used in both the napi and non-napi cases */
1805 lp->napi.weight = lp->rx_ring_size / 2;
1806
1807 netif_napi_add(dev, &lp->napi, pcnet32_poll, lp->rx_ring_size / 2);
1808
1809 if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1810 ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1811 lp->options |= PCNET32_PORT_FD;
1812
1813 lp->a = a;
1814
1815 /* prior to register_netdev, dev->name is not yet correct */
1816 if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1817 ret = -ENOMEM;
1818 goto err_free_ring;
1819 }
1820 /* detect special T1/E1 WAN card by checking for MAC address */
1821 if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0 &&
1822 dev->dev_addr[2] == 0x75)
1823 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1824
1825 lp->init_block->mode = cpu_to_le16(0x0003); /* Disable Rx and Tx. */
1826 lp->init_block->tlen_rlen =
1827 cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
1828 for (i = 0; i < 6; i++)
1829 lp->init_block->phys_addr[i] = dev->dev_addr[i];
1830 lp->init_block->filter[0] = 0x00000000;
1831 lp->init_block->filter[1] = 0x00000000;
1832 lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
1833 lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
1834
1835 /* switch pcnet32 to 32bit mode */
1836 a->write_bcr(ioaddr, 20, 2);
1837
1838 a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
1839 a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
1840
1841 if (pdev) { /* use the IRQ provided by PCI */
1842 dev->irq = pdev->irq;
1843 if (pcnet32_debug & NETIF_MSG_PROBE)
1844 pr_cont(" assigned IRQ %d\n", dev->irq);
1845 } else {
1846 unsigned long irq_mask = probe_irq_on();
1847
1848 /*
1849 * To auto-IRQ we enable the initialization-done and DMA error
1850 * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1851 * boards will work.
1852 */
1853 /* Trigger an initialization just for the interrupt. */
1854 a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_INIT);
1855 mdelay(1);
1856
1857 dev->irq = probe_irq_off(irq_mask);
1858 if (!dev->irq) {
1859 if (pcnet32_debug & NETIF_MSG_PROBE)
1860 pr_cont(", failed to detect IRQ line\n");
1861 ret = -ENODEV;
1862 goto err_free_ring;
1863 }
1864 if (pcnet32_debug & NETIF_MSG_PROBE)
1865 pr_cont(", probed IRQ %d\n", dev->irq);
1866 }
1867
1868 /* Set the mii phy_id so that we can query the link state */
1869 if (lp->mii) {
1870 /* lp->phycount and lp->phymask are set to 0 by memset above */
1871
1872 lp->mii_if.phy_id = ((lp->a->read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1873 /* scan for PHYs */
1874 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1875 unsigned short id1, id2;
1876
1877 id1 = mdio_read(dev, i, MII_PHYSID1);
1878 if (id1 == 0xffff)
1879 continue;
1880 id2 = mdio_read(dev, i, MII_PHYSID2);
1881 if (id2 == 0xffff)
1882 continue;
1883 if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1884 continue; /* 79C971 & 79C972 have phantom phy at id 31 */
1885 lp->phycount++;
1886 lp->phymask |= (1 << i);
1887 lp->mii_if.phy_id = i;
1888 if (pcnet32_debug & NETIF_MSG_PROBE)
1889 pr_info("Found PHY %04x:%04x at address %d\n",
1890 id1, id2, i);
1891 }
1892 lp->a->write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1893 if (lp->phycount > 1)
1894 lp->options |= PCNET32_PORT_MII;
1895 }
1896
1897 init_timer(&lp->watchdog_timer);
1898 lp->watchdog_timer.data = (unsigned long)dev;
1899 lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1900
1901 /* The PCNET32-specific entries in the device structure. */
1902 dev->netdev_ops = &pcnet32_netdev_ops;
1903 dev->ethtool_ops = &pcnet32_ethtool_ops;
1904 dev->watchdog_timeo = (5 * HZ);
1905
1906 /* Fill in the generic fields of the device structure. */
1907 if (register_netdev(dev))
1908 goto err_free_ring;
1909
1910 if (pdev) {
1911 pci_set_drvdata(pdev, dev);
1912 } else {
1913 lp->next = pcnet32_dev;
1914 pcnet32_dev = dev;
1915 }
1916
1917 if (pcnet32_debug & NETIF_MSG_PROBE)
1918 pr_info("%s: registered as %s\n", dev->name, lp->name);
1919 cards_found++;
1920
1921 /* enable LED writes */
1922 a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1923
1924 return 0;
1925
1926err_free_ring:
1927 pcnet32_free_ring(dev);
1928 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
1929 lp->init_block, lp->init_dma_addr);
1930err_free_netdev:
1931 free_netdev(dev);
1932err_release_region:
1933 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1934 return ret;
1935}
1936
1937/* if any allocation fails, caller must also call pcnet32_free_ring */
1938static int pcnet32_alloc_ring(struct net_device *dev, const char *name)
1939{
1940 struct pcnet32_private *lp = netdev_priv(dev);
1941
1942 lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
1943 sizeof(struct pcnet32_tx_head) *
1944 lp->tx_ring_size,
1945 &lp->tx_ring_dma_addr);
1946 if (lp->tx_ring == NULL) {
1947 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
1948 return -ENOMEM;
1949 }
1950
1951 lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
1952 sizeof(struct pcnet32_rx_head) *
1953 lp->rx_ring_size,
1954 &lp->rx_ring_dma_addr);
1955 if (lp->rx_ring == NULL) {
1956 netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
1957 return -ENOMEM;
1958 }
1959
1960 lp->tx_dma_addr = kcalloc(lp->tx_ring_size, sizeof(dma_addr_t),
1961 GFP_ATOMIC);
1962 if (!lp->tx_dma_addr)
1963 return -ENOMEM;
1964
1965 lp->rx_dma_addr = kcalloc(lp->rx_ring_size, sizeof(dma_addr_t),
1966 GFP_ATOMIC);
1967 if (!lp->rx_dma_addr)
1968 return -ENOMEM;
1969
1970 lp->tx_skbuff = kcalloc(lp->tx_ring_size, sizeof(struct sk_buff *),
1971 GFP_ATOMIC);
1972 if (!lp->tx_skbuff)
1973 return -ENOMEM;
1974
1975 lp->rx_skbuff = kcalloc(lp->rx_ring_size, sizeof(struct sk_buff *),
1976 GFP_ATOMIC);
1977 if (!lp->rx_skbuff)
1978 return -ENOMEM;
1979
1980 return 0;
1981}
1982
1983static void pcnet32_free_ring(struct net_device *dev)
1984{
1985 struct pcnet32_private *lp = netdev_priv(dev);
1986
1987 kfree(lp->tx_skbuff);
1988 lp->tx_skbuff = NULL;
1989
1990 kfree(lp->rx_skbuff);
1991 lp->rx_skbuff = NULL;
1992
1993 kfree(lp->tx_dma_addr);
1994 lp->tx_dma_addr = NULL;
1995
1996 kfree(lp->rx_dma_addr);
1997 lp->rx_dma_addr = NULL;
1998
1999 if (lp->tx_ring) {
2000 pci_free_consistent(lp->pci_dev,
2001 sizeof(struct pcnet32_tx_head) *
2002 lp->tx_ring_size, lp->tx_ring,
2003 lp->tx_ring_dma_addr);
2004 lp->tx_ring = NULL;
2005 }
2006
2007 if (lp->rx_ring) {
2008 pci_free_consistent(lp->pci_dev,
2009 sizeof(struct pcnet32_rx_head) *
2010 lp->rx_ring_size, lp->rx_ring,
2011 lp->rx_ring_dma_addr);
2012 lp->rx_ring = NULL;
2013 }
2014}
2015
2016static int pcnet32_open(struct net_device *dev)
2017{
2018 struct pcnet32_private *lp = netdev_priv(dev);
2019 struct pci_dev *pdev = lp->pci_dev;
2020 unsigned long ioaddr = dev->base_addr;
2021 u16 val;
2022 int i;
2023 int rc;
2024 unsigned long flags;
2025
2026 if (request_irq(dev->irq, pcnet32_interrupt,
2027 lp->shared_irq ? IRQF_SHARED : 0, dev->name,
2028 (void *)dev)) {
2029 return -EAGAIN;
2030 }
2031
2032 spin_lock_irqsave(&lp->lock, flags);
2033 /* Check for a valid station address */
2034 if (!is_valid_ether_addr(dev->dev_addr)) {
2035 rc = -EINVAL;
2036 goto err_free_irq;
2037 }
2038
2039 /* Reset the PCNET32 */
2040 lp->a->reset(ioaddr);
2041
2042 /* switch pcnet32 to 32bit mode */
2043 lp->a->write_bcr(ioaddr, 20, 2);
2044
2045 netif_printk(lp, ifup, KERN_DEBUG, dev,
2046 "%s() irq %d tx/rx rings %#x/%#x init %#x\n",
2047 __func__, dev->irq, (u32) (lp->tx_ring_dma_addr),
2048 (u32) (lp->rx_ring_dma_addr),
2049 (u32) (lp->init_dma_addr));
2050
2051 /* set/reset autoselect bit */
2052 val = lp->a->read_bcr(ioaddr, 2) & ~2;
2053 if (lp->options & PCNET32_PORT_ASEL)
2054 val |= 2;
2055 lp->a->write_bcr(ioaddr, 2, val);
2056
2057 /* handle full duplex setting */
2058 if (lp->mii_if.full_duplex) {
2059 val = lp->a->read_bcr(ioaddr, 9) & ~3;
2060 if (lp->options & PCNET32_PORT_FD) {
2061 val |= 1;
2062 if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
2063 val |= 2;
2064 } else if (lp->options & PCNET32_PORT_ASEL) {
2065 /* workaround of xSeries250, turn on for 79C975 only */
2066 if (lp->chip_version == 0x2627)
2067 val |= 3;
2068 }
2069 lp->a->write_bcr(ioaddr, 9, val);
2070 }
2071
2072 /* set/reset GPSI bit in test register */
2073 val = lp->a->read_csr(ioaddr, 124) & ~0x10;
2074 if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
2075 val |= 0x10;
2076 lp->a->write_csr(ioaddr, 124, val);
2077
2078 /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
2079 if (pdev && pdev->subsystem_vendor == PCI_VENDOR_ID_AT &&
2080 (pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
2081 pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
2082 if (lp->options & PCNET32_PORT_ASEL) {
2083 lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
2084 netif_printk(lp, link, KERN_DEBUG, dev,
2085 "Setting 100Mb-Full Duplex\n");
2086 }
2087 }
2088 if (lp->phycount < 2) {
2089 /*
2090 * 24 Jun 2004 according AMD, in order to change the PHY,
2091 * DANAS (or DISPM for 79C976) must be set; then select the speed,
2092 * duplex, and/or enable auto negotiation, and clear DANAS
2093 */
2094 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
2095 lp->a->write_bcr(ioaddr, 32,
2096 lp->a->read_bcr(ioaddr, 32) | 0x0080);
2097 /* disable Auto Negotiation, set 10Mpbs, HD */
2098 val = lp->a->read_bcr(ioaddr, 32) & ~0xb8;
2099 if (lp->options & PCNET32_PORT_FD)
2100 val |= 0x10;
2101 if (lp->options & PCNET32_PORT_100)
2102 val |= 0x08;
2103 lp->a->write_bcr(ioaddr, 32, val);
2104 } else {
2105 if (lp->options & PCNET32_PORT_ASEL) {
2106 lp->a->write_bcr(ioaddr, 32,
2107 lp->a->read_bcr(ioaddr,
2108 32) | 0x0080);
2109 /* enable auto negotiate, setup, disable fd */
2110 val = lp->a->read_bcr(ioaddr, 32) & ~0x98;
2111 val |= 0x20;
2112 lp->a->write_bcr(ioaddr, 32, val);
2113 }
2114 }
2115 } else {
2116 int first_phy = -1;
2117 u16 bmcr;
2118 u32 bcr9;
2119 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
2120
2121 /*
2122 * There is really no good other way to handle multiple PHYs
2123 * other than turning off all automatics
2124 */
2125 val = lp->a->read_bcr(ioaddr, 2);
2126 lp->a->write_bcr(ioaddr, 2, val & ~2);
2127 val = lp->a->read_bcr(ioaddr, 32);
2128 lp->a->write_bcr(ioaddr, 32, val & ~(1 << 7)); /* stop MII manager */
2129
2130 if (!(lp->options & PCNET32_PORT_ASEL)) {
2131 /* setup ecmd */
2132 ecmd.port = PORT_MII;
2133 ecmd.transceiver = XCVR_INTERNAL;
2134 ecmd.autoneg = AUTONEG_DISABLE;
2135 ethtool_cmd_speed_set(&ecmd,
2136 (lp->options & PCNET32_PORT_100) ?
2137 SPEED_100 : SPEED_10);
2138 bcr9 = lp->a->read_bcr(ioaddr, 9);
2139
2140 if (lp->options & PCNET32_PORT_FD) {
2141 ecmd.duplex = DUPLEX_FULL;
2142 bcr9 |= (1 << 0);
2143 } else {
2144 ecmd.duplex = DUPLEX_HALF;
2145 bcr9 |= ~(1 << 0);
2146 }
2147 lp->a->write_bcr(ioaddr, 9, bcr9);
2148 }
2149
2150 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2151 if (lp->phymask & (1 << i)) {
2152 /* isolate all but the first PHY */
2153 bmcr = mdio_read(dev, i, MII_BMCR);
2154 if (first_phy == -1) {
2155 first_phy = i;
2156 mdio_write(dev, i, MII_BMCR,
2157 bmcr & ~BMCR_ISOLATE);
2158 } else {
2159 mdio_write(dev, i, MII_BMCR,
2160 bmcr | BMCR_ISOLATE);
2161 }
2162 /* use mii_ethtool_sset to setup PHY */
2163 lp->mii_if.phy_id = i;
2164 ecmd.phy_address = i;
2165 if (lp->options & PCNET32_PORT_ASEL) {
2166 mii_ethtool_gset(&lp->mii_if, &ecmd);
2167 ecmd.autoneg = AUTONEG_ENABLE;
2168 }
2169 mii_ethtool_sset(&lp->mii_if, &ecmd);
2170 }
2171 }
2172 lp->mii_if.phy_id = first_phy;
2173 netif_info(lp, link, dev, "Using PHY number %d\n", first_phy);
2174 }
2175
2176#ifdef DO_DXSUFLO
2177 if (lp->dxsuflo) { /* Disable transmit stop on underflow */
2178 val = lp->a->read_csr(ioaddr, CSR3);
2179 val |= 0x40;
2180 lp->a->write_csr(ioaddr, CSR3, val);
2181 }
2182#endif
2183
2184 lp->init_block->mode =
2185 cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2186 pcnet32_load_multicast(dev);
2187
2188 if (pcnet32_init_ring(dev)) {
2189 rc = -ENOMEM;
2190 goto err_free_ring;
2191 }
2192
2193 napi_enable(&lp->napi);
2194
2195 /* Re-initialize the PCNET32, and start it when done. */
2196 lp->a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
2197 lp->a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
2198
2199 lp->a->write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
2200 lp->a->write_csr(ioaddr, CSR0, CSR0_INIT);
2201
2202 netif_start_queue(dev);
2203
2204 if (lp->chip_version >= PCNET32_79C970A) {
2205 /* Print the link status and start the watchdog */
2206 pcnet32_check_media(dev, 1);
2207 mod_timer(&lp->watchdog_timer, PCNET32_WATCHDOG_TIMEOUT);
2208 }
2209
2210 i = 0;
2211 while (i++ < 100)
2212 if (lp->a->read_csr(ioaddr, CSR0) & CSR0_IDON)
2213 break;
2214 /*
2215 * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
2216 * reports that doing so triggers a bug in the '974.
2217 */
2218 lp->a->write_csr(ioaddr, CSR0, CSR0_NORMAL);
2219
2220 netif_printk(lp, ifup, KERN_DEBUG, dev,
2221 "pcnet32 open after %d ticks, init block %#x csr0 %4.4x\n",
2222 i,
2223 (u32) (lp->init_dma_addr),
2224 lp->a->read_csr(ioaddr, CSR0));
2225
2226 spin_unlock_irqrestore(&lp->lock, flags);
2227
2228 return 0; /* Always succeed */
2229
2230err_free_ring:
2231 /* free any allocated skbuffs */
2232 pcnet32_purge_rx_ring(dev);
2233
2234 /*
2235 * Switch back to 16bit mode to avoid problems with dumb
2236 * DOS packet driver after a warm reboot
2237 */
2238 lp->a->write_bcr(ioaddr, 20, 4);
2239
2240err_free_irq:
2241 spin_unlock_irqrestore(&lp->lock, flags);
2242 free_irq(dev->irq, dev);
2243 return rc;
2244}
2245
2246/*
2247 * The LANCE has been halted for one reason or another (busmaster memory
2248 * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
2249 * etc.). Modern LANCE variants always reload their ring-buffer
2250 * configuration when restarted, so we must reinitialize our ring
2251 * context before restarting. As part of this reinitialization,
2252 * find all packets still on the Tx ring and pretend that they had been
2253 * sent (in effect, drop the packets on the floor) - the higher-level
2254 * protocols will time out and retransmit. It'd be better to shuffle
2255 * these skbs to a temp list and then actually re-Tx them after
2256 * restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
2257 */
2258
2259static void pcnet32_purge_tx_ring(struct net_device *dev)
2260{
2261 struct pcnet32_private *lp = netdev_priv(dev);
2262 int i;
2263
2264 for (i = 0; i < lp->tx_ring_size; i++) {
2265 lp->tx_ring[i].status = 0; /* CPU owns buffer */
2266 wmb(); /* Make sure adapter sees owner change */
2267 if (lp->tx_skbuff[i]) {
2268 if (!pci_dma_mapping_error(lp->pci_dev,
2269 lp->tx_dma_addr[i]))
2270 pci_unmap_single(lp->pci_dev,
2271 lp->tx_dma_addr[i],
2272 lp->tx_skbuff[i]->len,
2273 PCI_DMA_TODEVICE);
2274 dev_kfree_skb_any(lp->tx_skbuff[i]);
2275 }
2276 lp->tx_skbuff[i] = NULL;
2277 lp->tx_dma_addr[i] = 0;
2278 }
2279}
2280
2281/* Initialize the PCNET32 Rx and Tx rings. */
2282static int pcnet32_init_ring(struct net_device *dev)
2283{
2284 struct pcnet32_private *lp = netdev_priv(dev);
2285 int i;
2286
2287 lp->tx_full = 0;
2288 lp->cur_rx = lp->cur_tx = 0;
2289 lp->dirty_rx = lp->dirty_tx = 0;
2290
2291 for (i = 0; i < lp->rx_ring_size; i++) {
2292 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
2293 if (rx_skbuff == NULL) {
2294 lp->rx_skbuff[i] = netdev_alloc_skb(dev, PKT_BUF_SKB);
2295 rx_skbuff = lp->rx_skbuff[i];
2296 if (!rx_skbuff) {
2297 /* there is not much we can do at this point */
2298 netif_err(lp, drv, dev, "%s netdev_alloc_skb failed\n",
2299 __func__);
2300 return -1;
2301 }
2302 skb_reserve(rx_skbuff, NET_IP_ALIGN);
2303 }
2304
2305 rmb();
2306 if (lp->rx_dma_addr[i] == 0) {
2307 lp->rx_dma_addr[i] =
2308 pci_map_single(lp->pci_dev, rx_skbuff->data,
2309 PKT_BUF_SIZE, PCI_DMA_FROMDEVICE);
2310 if (pci_dma_mapping_error(lp->pci_dev,
2311 lp->rx_dma_addr[i])) {
2312 /* there is not much we can do at this point */
2313 netif_err(lp, drv, dev,
2314 "%s pci dma mapping error\n",
2315 __func__);
2316 return -1;
2317 }
2318 }
2319 lp->rx_ring[i].base = cpu_to_le32(lp->rx_dma_addr[i]);
2320 lp->rx_ring[i].buf_length = cpu_to_le16(NEG_BUF_SIZE);
2321 wmb(); /* Make sure owner changes after all others are visible */
2322 lp->rx_ring[i].status = cpu_to_le16(0x8000);
2323 }
2324 /* The Tx buffer address is filled in as needed, but we do need to clear
2325 * the upper ownership bit. */
2326 for (i = 0; i < lp->tx_ring_size; i++) {
2327 lp->tx_ring[i].status = 0; /* CPU owns buffer */
2328 wmb(); /* Make sure adapter sees owner change */
2329 lp->tx_ring[i].base = 0;
2330 lp->tx_dma_addr[i] = 0;
2331 }
2332
2333 lp->init_block->tlen_rlen =
2334 cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
2335 for (i = 0; i < 6; i++)
2336 lp->init_block->phys_addr[i] = dev->dev_addr[i];
2337 lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
2338 lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
2339 wmb(); /* Make sure all changes are visible */
2340 return 0;
2341}
2342
2343/* the pcnet32 has been issued a stop or reset. Wait for the stop bit
2344 * then flush the pending transmit operations, re-initialize the ring,
2345 * and tell the chip to initialize.
2346 */
2347static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
2348{
2349 struct pcnet32_private *lp = netdev_priv(dev);
2350 unsigned long ioaddr = dev->base_addr;
2351 int i;
2352
2353 /* wait for stop */
2354 for (i = 0; i < 100; i++)
2355 if (lp->a->read_csr(ioaddr, CSR0) & CSR0_STOP)
2356 break;
2357
2358 if (i >= 100)
2359 netif_err(lp, drv, dev, "%s timed out waiting for stop\n",
2360 __func__);
2361
2362 pcnet32_purge_tx_ring(dev);
2363 if (pcnet32_init_ring(dev))
2364 return;
2365
2366 /* ReInit Ring */
2367 lp->a->write_csr(ioaddr, CSR0, CSR0_INIT);
2368 i = 0;
2369 while (i++ < 1000)
2370 if (lp->a->read_csr(ioaddr, CSR0) & CSR0_IDON)
2371 break;
2372
2373 lp->a->write_csr(ioaddr, CSR0, csr0_bits);
2374}
2375
2376static void pcnet32_tx_timeout(struct net_device *dev)
2377{
2378 struct pcnet32_private *lp = netdev_priv(dev);
2379 unsigned long ioaddr = dev->base_addr, flags;
2380
2381 spin_lock_irqsave(&lp->lock, flags);
2382 /* Transmitter timeout, serious problems. */
2383 if (pcnet32_debug & NETIF_MSG_DRV)
2384 pr_err("%s: transmit timed out, status %4.4x, resetting\n",
2385 dev->name, lp->a->read_csr(ioaddr, CSR0));
2386 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP);
2387 dev->stats.tx_errors++;
2388 if (netif_msg_tx_err(lp)) {
2389 int i;
2390 printk(KERN_DEBUG
2391 " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
2392 lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
2393 lp->cur_rx);
2394 for (i = 0; i < lp->rx_ring_size; i++)
2395 printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2396 le32_to_cpu(lp->rx_ring[i].base),
2397 (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
2398 0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
2399 le16_to_cpu(lp->rx_ring[i].status));
2400 for (i = 0; i < lp->tx_ring_size; i++)
2401 printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2402 le32_to_cpu(lp->tx_ring[i].base),
2403 (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
2404 le32_to_cpu(lp->tx_ring[i].misc),
2405 le16_to_cpu(lp->tx_ring[i].status));
2406 printk("\n");
2407 }
2408 pcnet32_restart(dev, CSR0_NORMAL);
2409
2410 dev->trans_start = jiffies; /* prevent tx timeout */
2411 netif_wake_queue(dev);
2412
2413 spin_unlock_irqrestore(&lp->lock, flags);
2414}
2415
2416static netdev_tx_t pcnet32_start_xmit(struct sk_buff *skb,
2417 struct net_device *dev)
2418{
2419 struct pcnet32_private *lp = netdev_priv(dev);
2420 unsigned long ioaddr = dev->base_addr;
2421 u16 status;
2422 int entry;
2423 unsigned long flags;
2424
2425 spin_lock_irqsave(&lp->lock, flags);
2426
2427 netif_printk(lp, tx_queued, KERN_DEBUG, dev,
2428 "%s() called, csr0 %4.4x\n",
2429 __func__, lp->a->read_csr(ioaddr, CSR0));
2430
2431 /* Default status -- will not enable Successful-TxDone
2432 * interrupt when that option is available to us.
2433 */
2434 status = 0x8300;
2435
2436 /* Fill in a Tx ring entry */
2437
2438 /* Mask to ring buffer boundary. */
2439 entry = lp->cur_tx & lp->tx_mod_mask;
2440
2441 /* Caution: the write order is important here, set the status
2442 * with the "ownership" bits last. */
2443
2444 lp->tx_ring[entry].length = cpu_to_le16(-skb->len);
2445
2446 lp->tx_ring[entry].misc = 0x00000000;
2447
2448 lp->tx_dma_addr[entry] =
2449 pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2450 if (pci_dma_mapping_error(lp->pci_dev, lp->tx_dma_addr[entry])) {
2451 dev_kfree_skb_any(skb);
2452 dev->stats.tx_dropped++;
2453 goto drop_packet;
2454 }
2455 lp->tx_skbuff[entry] = skb;
2456 lp->tx_ring[entry].base = cpu_to_le32(lp->tx_dma_addr[entry]);
2457 wmb(); /* Make sure owner changes after all others are visible */
2458 lp->tx_ring[entry].status = cpu_to_le16(status);
2459
2460 lp->cur_tx++;
2461 dev->stats.tx_bytes += skb->len;
2462
2463 /* Trigger an immediate send poll. */
2464 lp->a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_TXPOLL);
2465
2466 if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2467 lp->tx_full = 1;
2468 netif_stop_queue(dev);
2469 }
2470drop_packet:
2471 spin_unlock_irqrestore(&lp->lock, flags);
2472 return NETDEV_TX_OK;
2473}
2474
2475/* The PCNET32 interrupt handler. */
2476static irqreturn_t
2477pcnet32_interrupt(int irq, void *dev_id)
2478{
2479 struct net_device *dev = dev_id;
2480 struct pcnet32_private *lp;
2481 unsigned long ioaddr;
2482 u16 csr0;
2483 int boguscnt = max_interrupt_work;
2484
2485 ioaddr = dev->base_addr;
2486 lp = netdev_priv(dev);
2487
2488 spin_lock(&lp->lock);
2489
2490 csr0 = lp->a->read_csr(ioaddr, CSR0);
2491 while ((csr0 & 0x8f00) && --boguscnt >= 0) {
2492 if (csr0 == 0xffff)
2493 break; /* PCMCIA remove happened */
2494 /* Acknowledge all of the current interrupt sources ASAP. */
2495 lp->a->write_csr(ioaddr, CSR0, csr0 & ~0x004f);
2496
2497 netif_printk(lp, intr, KERN_DEBUG, dev,
2498 "interrupt csr0=%#2.2x new csr=%#2.2x\n",
2499 csr0, lp->a->read_csr(ioaddr, CSR0));
2500
2501 /* Log misc errors. */
2502 if (csr0 & 0x4000)
2503 dev->stats.tx_errors++; /* Tx babble. */
2504 if (csr0 & 0x1000) {
2505 /*
2506 * This happens when our receive ring is full. This
2507 * shouldn't be a problem as we will see normal rx
2508 * interrupts for the frames in the receive ring. But
2509 * there are some PCI chipsets (I can reproduce this
2510 * on SP3G with Intel saturn chipset) which have
2511 * sometimes problems and will fill up the receive
2512 * ring with error descriptors. In this situation we
2513 * don't get a rx interrupt, but a missed frame
2514 * interrupt sooner or later.
2515 */
2516 dev->stats.rx_errors++; /* Missed a Rx frame. */
2517 }
2518 if (csr0 & 0x0800) {
2519 netif_err(lp, drv, dev, "Bus master arbitration failure, status %4.4x\n",
2520 csr0);
2521 /* unlike for the lance, there is no restart needed */
2522 }
2523 if (napi_schedule_prep(&lp->napi)) {
2524 u16 val;
2525 /* set interrupt masks */
2526 val = lp->a->read_csr(ioaddr, CSR3);
2527 val |= 0x5f00;
2528 lp->a->write_csr(ioaddr, CSR3, val);
2529
2530 __napi_schedule(&lp->napi);
2531 break;
2532 }
2533 csr0 = lp->a->read_csr(ioaddr, CSR0);
2534 }
2535
2536 netif_printk(lp, intr, KERN_DEBUG, dev,
2537 "exiting interrupt, csr0=%#4.4x\n",
2538 lp->a->read_csr(ioaddr, CSR0));
2539
2540 spin_unlock(&lp->lock);
2541
2542 return IRQ_HANDLED;
2543}
2544
2545static int pcnet32_close(struct net_device *dev)
2546{
2547 unsigned long ioaddr = dev->base_addr;
2548 struct pcnet32_private *lp = netdev_priv(dev);
2549 unsigned long flags;
2550
2551 del_timer_sync(&lp->watchdog_timer);
2552
2553 netif_stop_queue(dev);
2554 napi_disable(&lp->napi);
2555
2556 spin_lock_irqsave(&lp->lock, flags);
2557
2558 dev->stats.rx_missed_errors = lp->a->read_csr(ioaddr, 112);
2559
2560 netif_printk(lp, ifdown, KERN_DEBUG, dev,
2561 "Shutting down ethercard, status was %2.2x\n",
2562 lp->a->read_csr(ioaddr, CSR0));
2563
2564 /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2565 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP);
2566
2567 /*
2568 * Switch back to 16bit mode to avoid problems with dumb
2569 * DOS packet driver after a warm reboot
2570 */
2571 lp->a->write_bcr(ioaddr, 20, 4);
2572
2573 spin_unlock_irqrestore(&lp->lock, flags);
2574
2575 free_irq(dev->irq, dev);
2576
2577 spin_lock_irqsave(&lp->lock, flags);
2578
2579 pcnet32_purge_rx_ring(dev);
2580 pcnet32_purge_tx_ring(dev);
2581
2582 spin_unlock_irqrestore(&lp->lock, flags);
2583
2584 return 0;
2585}
2586
2587static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2588{
2589 struct pcnet32_private *lp = netdev_priv(dev);
2590 unsigned long ioaddr = dev->base_addr;
2591 unsigned long flags;
2592
2593 spin_lock_irqsave(&lp->lock, flags);
2594 dev->stats.rx_missed_errors = lp->a->read_csr(ioaddr, 112);
2595 spin_unlock_irqrestore(&lp->lock, flags);
2596
2597 return &dev->stats;
2598}
2599
2600/* taken from the sunlance driver, which it took from the depca driver */
2601static void pcnet32_load_multicast(struct net_device *dev)
2602{
2603 struct pcnet32_private *lp = netdev_priv(dev);
2604 volatile struct pcnet32_init_block *ib = lp->init_block;
2605 volatile __le16 *mcast_table = (__le16 *)ib->filter;
2606 struct netdev_hw_addr *ha;
2607 unsigned long ioaddr = dev->base_addr;
2608 int i;
2609 u32 crc;
2610
2611 /* set all multicast bits */
2612 if (dev->flags & IFF_ALLMULTI) {
2613 ib->filter[0] = cpu_to_le32(~0U);
2614 ib->filter[1] = cpu_to_le32(~0U);
2615 lp->a->write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2616 lp->a->write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2617 lp->a->write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2618 lp->a->write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2619 return;
2620 }
2621 /* clear the multicast filter */
2622 ib->filter[0] = 0;
2623 ib->filter[1] = 0;
2624
2625 /* Add addresses */
2626 netdev_for_each_mc_addr(ha, dev) {
2627 crc = ether_crc_le(6, ha->addr);
2628 crc = crc >> 26;
2629 mcast_table[crc >> 4] |= cpu_to_le16(1 << (crc & 0xf));
2630 }
2631 for (i = 0; i < 4; i++)
2632 lp->a->write_csr(ioaddr, PCNET32_MC_FILTER + i,
2633 le16_to_cpu(mcast_table[i]));
2634}
2635
2636/*
2637 * Set or clear the multicast filter for this adaptor.
2638 */
2639static void pcnet32_set_multicast_list(struct net_device *dev)
2640{
2641 unsigned long ioaddr = dev->base_addr, flags;
2642 struct pcnet32_private *lp = netdev_priv(dev);
2643 int csr15, suspended;
2644
2645 spin_lock_irqsave(&lp->lock, flags);
2646 suspended = pcnet32_suspend(dev, &flags, 0);
2647 csr15 = lp->a->read_csr(ioaddr, CSR15);
2648 if (dev->flags & IFF_PROMISC) {
2649 /* Log any net taps. */
2650 netif_info(lp, hw, dev, "Promiscuous mode enabled\n");
2651 lp->init_block->mode =
2652 cpu_to_le16(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2653 7);
2654 lp->a->write_csr(ioaddr, CSR15, csr15 | 0x8000);
2655 } else {
2656 lp->init_block->mode =
2657 cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2658 lp->a->write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2659 pcnet32_load_multicast(dev);
2660 }
2661
2662 if (suspended) {
2663 int csr5;
2664 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2665 csr5 = lp->a->read_csr(ioaddr, CSR5);
2666 lp->a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2667 } else {
2668 lp->a->write_csr(ioaddr, CSR0, CSR0_STOP);
2669 pcnet32_restart(dev, CSR0_NORMAL);
2670 netif_wake_queue(dev);
2671 }
2672
2673 spin_unlock_irqrestore(&lp->lock, flags);
2674}
2675
2676/* This routine assumes that the lp->lock is held */
2677static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2678{
2679 struct pcnet32_private *lp = netdev_priv(dev);
2680 unsigned long ioaddr = dev->base_addr;
2681 u16 val_out;
2682
2683 if (!lp->mii)
2684 return 0;
2685
2686 lp->a->write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2687 val_out = lp->a->read_bcr(ioaddr, 34);
2688
2689 return val_out;
2690}
2691
2692/* This routine assumes that the lp->lock is held */
2693static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2694{
2695 struct pcnet32_private *lp = netdev_priv(dev);
2696 unsigned long ioaddr = dev->base_addr;
2697
2698 if (!lp->mii)
2699 return;
2700
2701 lp->a->write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2702 lp->a->write_bcr(ioaddr, 34, val);
2703}
2704
2705static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2706{
2707 struct pcnet32_private *lp = netdev_priv(dev);
2708 int rc;
2709 unsigned long flags;
2710
2711 /* SIOC[GS]MIIxxx ioctls */
2712 if (lp->mii) {
2713 spin_lock_irqsave(&lp->lock, flags);
2714 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2715 spin_unlock_irqrestore(&lp->lock, flags);
2716 } else {
2717 rc = -EOPNOTSUPP;
2718 }
2719
2720 return rc;
2721}
2722
2723static int pcnet32_check_otherphy(struct net_device *dev)
2724{
2725 struct pcnet32_private *lp = netdev_priv(dev);
2726 struct mii_if_info mii = lp->mii_if;
2727 u16 bmcr;
2728 int i;
2729
2730 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2731 if (i == lp->mii_if.phy_id)
2732 continue; /* skip active phy */
2733 if (lp->phymask & (1 << i)) {
2734 mii.phy_id = i;
2735 if (mii_link_ok(&mii)) {
2736 /* found PHY with active link */
2737 netif_info(lp, link, dev, "Using PHY number %d\n",
2738 i);
2739
2740 /* isolate inactive phy */
2741 bmcr =
2742 mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2743 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2744 bmcr | BMCR_ISOLATE);
2745
2746 /* de-isolate new phy */
2747 bmcr = mdio_read(dev, i, MII_BMCR);
2748 mdio_write(dev, i, MII_BMCR,
2749 bmcr & ~BMCR_ISOLATE);
2750
2751 /* set new phy address */
2752 lp->mii_if.phy_id = i;
2753 return 1;
2754 }
2755 }
2756 }
2757 return 0;
2758}
2759
2760/*
2761 * Show the status of the media. Similar to mii_check_media however it
2762 * correctly shows the link speed for all (tested) pcnet32 variants.
2763 * Devices with no mii just report link state without speed.
2764 *
2765 * Caller is assumed to hold and release the lp->lock.
2766 */
2767
2768static void pcnet32_check_media(struct net_device *dev, int verbose)
2769{
2770 struct pcnet32_private *lp = netdev_priv(dev);
2771 int curr_link;
2772 int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2773 u32 bcr9;
2774
2775 if (lp->mii) {
2776 curr_link = mii_link_ok(&lp->mii_if);
2777 } else {
2778 ulong ioaddr = dev->base_addr; /* card base I/O address */
2779 curr_link = (lp->a->read_bcr(ioaddr, 4) != 0xc0);
2780 }
2781 if (!curr_link) {
2782 if (prev_link || verbose) {
2783 netif_carrier_off(dev);
2784 netif_info(lp, link, dev, "link down\n");
2785 }
2786 if (lp->phycount > 1) {
2787 curr_link = pcnet32_check_otherphy(dev);
2788 prev_link = 0;
2789 }
2790 } else if (verbose || !prev_link) {
2791 netif_carrier_on(dev);
2792 if (lp->mii) {
2793 if (netif_msg_link(lp)) {
2794 struct ethtool_cmd ecmd = {
2795 .cmd = ETHTOOL_GSET };
2796 mii_ethtool_gset(&lp->mii_if, &ecmd);
2797 netdev_info(dev, "link up, %uMbps, %s-duplex\n",
2798 ethtool_cmd_speed(&ecmd),
2799 (ecmd.duplex == DUPLEX_FULL)
2800 ? "full" : "half");
2801 }
2802 bcr9 = lp->a->read_bcr(dev->base_addr, 9);
2803 if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2804 if (lp->mii_if.full_duplex)
2805 bcr9 |= (1 << 0);
2806 else
2807 bcr9 &= ~(1 << 0);
2808 lp->a->write_bcr(dev->base_addr, 9, bcr9);
2809 }
2810 } else {
2811 netif_info(lp, link, dev, "link up\n");
2812 }
2813 }
2814}
2815
2816/*
2817 * Check for loss of link and link establishment.
2818 * Can not use mii_check_media because it does nothing if mode is forced.
2819 */
2820
2821static void pcnet32_watchdog(struct net_device *dev)
2822{
2823 struct pcnet32_private *lp = netdev_priv(dev);
2824 unsigned long flags;
2825
2826 /* Print the link status if it has changed */
2827 spin_lock_irqsave(&lp->lock, flags);
2828 pcnet32_check_media(dev, 0);
2829 spin_unlock_irqrestore(&lp->lock, flags);
2830
2831 mod_timer(&lp->watchdog_timer, round_jiffies(PCNET32_WATCHDOG_TIMEOUT));
2832}
2833
2834static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
2835{
2836 struct net_device *dev = pci_get_drvdata(pdev);
2837
2838 if (netif_running(dev)) {
2839 netif_device_detach(dev);
2840 pcnet32_close(dev);
2841 }
2842 pci_save_state(pdev);
2843 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2844 return 0;
2845}
2846
2847static int pcnet32_pm_resume(struct pci_dev *pdev)
2848{
2849 struct net_device *dev = pci_get_drvdata(pdev);
2850
2851 pci_set_power_state(pdev, PCI_D0);
2852 pci_restore_state(pdev);
2853
2854 if (netif_running(dev)) {
2855 pcnet32_open(dev);
2856 netif_device_attach(dev);
2857 }
2858 return 0;
2859}
2860
2861static void pcnet32_remove_one(struct pci_dev *pdev)
2862{
2863 struct net_device *dev = pci_get_drvdata(pdev);
2864
2865 if (dev) {
2866 struct pcnet32_private *lp = netdev_priv(dev);
2867
2868 unregister_netdev(dev);
2869 pcnet32_free_ring(dev);
2870 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2871 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2872 lp->init_block, lp->init_dma_addr);
2873 free_netdev(dev);
2874 pci_disable_device(pdev);
2875 }
2876}
2877
2878static struct pci_driver pcnet32_driver = {
2879 .name = DRV_NAME,
2880 .probe = pcnet32_probe_pci,
2881 .remove = pcnet32_remove_one,
2882 .id_table = pcnet32_pci_tbl,
2883 .suspend = pcnet32_pm_suspend,
2884 .resume = pcnet32_pm_resume,
2885};
2886
2887/* An additional parameter that may be passed in... */
2888static int debug = -1;
2889static int tx_start_pt = -1;
2890static int pcnet32_have_pci;
2891
2892module_param(debug, int, 0);
2893MODULE_PARM_DESC(debug, DRV_NAME " debug level");
2894module_param(max_interrupt_work, int, 0);
2895MODULE_PARM_DESC(max_interrupt_work,
2896 DRV_NAME " maximum events handled per interrupt");
2897module_param(rx_copybreak, int, 0);
2898MODULE_PARM_DESC(rx_copybreak,
2899 DRV_NAME " copy breakpoint for copy-only-tiny-frames");
2900module_param(tx_start_pt, int, 0);
2901MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
2902module_param(pcnet32vlb, int, 0);
2903MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
2904module_param_array(options, int, NULL, 0);
2905MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
2906module_param_array(full_duplex, int, NULL, 0);
2907MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
2908/* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
2909module_param_array(homepna, int, NULL, 0);
2910MODULE_PARM_DESC(homepna,
2911 DRV_NAME
2912 " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
2913
2914MODULE_AUTHOR("Thomas Bogendoerfer");
2915MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
2916MODULE_LICENSE("GPL");
2917
2918#define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
2919
2920static int __init pcnet32_init_module(void)
2921{
2922 pr_info("%s", version);
2923
2924 pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
2925
2926 if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
2927 tx_start = tx_start_pt;
2928
2929 /* find the PCI devices */
2930 if (!pci_register_driver(&pcnet32_driver))
2931 pcnet32_have_pci = 1;
2932
2933 /* should we find any remaining VLbus devices ? */
2934 if (pcnet32vlb)
2935 pcnet32_probe_vlbus(pcnet32_portlist);
2936
2937 if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
2938 pr_info("%d cards_found\n", cards_found);
2939
2940 return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
2941}
2942
2943static void __exit pcnet32_cleanup_module(void)
2944{
2945 struct net_device *next_dev;
2946
2947 while (pcnet32_dev) {
2948 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
2949 next_dev = lp->next;
2950 unregister_netdev(pcnet32_dev);
2951 pcnet32_free_ring(pcnet32_dev);
2952 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
2953 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2954 lp->init_block, lp->init_dma_addr);
2955 free_netdev(pcnet32_dev);
2956 pcnet32_dev = next_dev;
2957 }
2958
2959 if (pcnet32_have_pci)
2960 pci_unregister_driver(&pcnet32_driver);
2961}
2962
2963module_init(pcnet32_init_module);
2964module_exit(pcnet32_cleanup_module);
2965
2966/*
2967 * Local variables:
2968 * c-indent-level: 4
2969 * tab-width: 8
2970 * End:
2971 */