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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 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 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 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 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
527free_new_lists:
528 kfree(new_dma_addr_list);
529free_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 */
547static 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
633free_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);
642free_new_lists:
643 kfree(new_dma_addr_list);
644free_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
652static 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
672static 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
680static 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
695static 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
709static 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
722static 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
742static u32 pcnet32_get_msglevel(struct net_device *dev)
743{
744 struct pcnet32_private *lp = netdev_priv(dev);
745 return lp->msg_enable;
746}
747
748static 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
754static 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
768static 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
779static 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
832static 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
838static 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
848static 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
868static 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
1003clean_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
1025static 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 */
1065static 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
1105static 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
1201static 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
1226static 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
1313static 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
1354static 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
1362static 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
1423static 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
1444static 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
1463static int __devinit
1464pcnet32_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
1502static 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 */
1522static int __devinit
1523pcnet32_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
1901err_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);
1905err_free_netdev:
1906 free_netdev(dev);
1907err_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 */
1913static 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
1966static 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
1999static 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
2213err_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
2223err_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
2242static 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. */
2262static 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 */
2318static 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
2347static 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
2387static 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. */
2441static irqreturn_t
2442pcnet32_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
2510static 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
2552static 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 */
2566static 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 int i;
2574 u32 crc;
2575
2576 /* set all multicast bits */
2577 if (dev->flags & IFF_ALLMULTI) {
2578 ib->filter[0] = cpu_to_le32(~0U);
2579 ib->filter[1] = cpu_to_le32(~0U);
2580 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2581 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2582 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2583 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2584 return;
2585 }
2586 /* clear the multicast filter */
2587 ib->filter[0] = 0;
2588 ib->filter[1] = 0;
2589
2590 /* Add addresses */
2591 netdev_for_each_mc_addr(ha, dev) {
2592 crc = ether_crc_le(6, ha->addr);
2593 crc = crc >> 26;
2594 mcast_table[crc >> 4] |= cpu_to_le16(1 << (crc & 0xf));
2595 }
2596 for (i = 0; i < 4; i++)
2597 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER + i,
2598 le16_to_cpu(mcast_table[i]));
2599}
2600
2601/*
2602 * Set or clear the multicast filter for this adaptor.
2603 */
2604static void pcnet32_set_multicast_list(struct net_device *dev)
2605{
2606 unsigned long ioaddr = dev->base_addr, flags;
2607 struct pcnet32_private *lp = netdev_priv(dev);
2608 int csr15, suspended;
2609
2610 spin_lock_irqsave(&lp->lock, flags);
2611 suspended = pcnet32_suspend(dev, &flags, 0);
2612 csr15 = lp->a.read_csr(ioaddr, CSR15);
2613 if (dev->flags & IFF_PROMISC) {
2614 /* Log any net taps. */
2615 netif_info(lp, hw, dev, "Promiscuous mode enabled\n");
2616 lp->init_block->mode =
2617 cpu_to_le16(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2618 7);
2619 lp->a.write_csr(ioaddr, CSR15, csr15 | 0x8000);
2620 } else {
2621 lp->init_block->mode =
2622 cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2623 lp->a.write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2624 pcnet32_load_multicast(dev);
2625 }
2626
2627 if (suspended) {
2628 int csr5;
2629 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2630 csr5 = lp->a.read_csr(ioaddr, CSR5);
2631 lp->a.write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2632 } else {
2633 lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2634 pcnet32_restart(dev, CSR0_NORMAL);
2635 netif_wake_queue(dev);
2636 }
2637
2638 spin_unlock_irqrestore(&lp->lock, flags);
2639}
2640
2641/* This routine assumes that the lp->lock is held */
2642static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2643{
2644 struct pcnet32_private *lp = netdev_priv(dev);
2645 unsigned long ioaddr = dev->base_addr;
2646 u16 val_out;
2647
2648 if (!lp->mii)
2649 return 0;
2650
2651 lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2652 val_out = lp->a.read_bcr(ioaddr, 34);
2653
2654 return val_out;
2655}
2656
2657/* This routine assumes that the lp->lock is held */
2658static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2659{
2660 struct pcnet32_private *lp = netdev_priv(dev);
2661 unsigned long ioaddr = dev->base_addr;
2662
2663 if (!lp->mii)
2664 return;
2665
2666 lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2667 lp->a.write_bcr(ioaddr, 34, val);
2668}
2669
2670static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2671{
2672 struct pcnet32_private *lp = netdev_priv(dev);
2673 int rc;
2674 unsigned long flags;
2675
2676 /* SIOC[GS]MIIxxx ioctls */
2677 if (lp->mii) {
2678 spin_lock_irqsave(&lp->lock, flags);
2679 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2680 spin_unlock_irqrestore(&lp->lock, flags);
2681 } else {
2682 rc = -EOPNOTSUPP;
2683 }
2684
2685 return rc;
2686}
2687
2688static int pcnet32_check_otherphy(struct net_device *dev)
2689{
2690 struct pcnet32_private *lp = netdev_priv(dev);
2691 struct mii_if_info mii = lp->mii_if;
2692 u16 bmcr;
2693 int i;
2694
2695 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2696 if (i == lp->mii_if.phy_id)
2697 continue; /* skip active phy */
2698 if (lp->phymask & (1 << i)) {
2699 mii.phy_id = i;
2700 if (mii_link_ok(&mii)) {
2701 /* found PHY with active link */
2702 netif_info(lp, link, dev, "Using PHY number %d\n",
2703 i);
2704
2705 /* isolate inactive phy */
2706 bmcr =
2707 mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2708 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2709 bmcr | BMCR_ISOLATE);
2710
2711 /* de-isolate new phy */
2712 bmcr = mdio_read(dev, i, MII_BMCR);
2713 mdio_write(dev, i, MII_BMCR,
2714 bmcr & ~BMCR_ISOLATE);
2715
2716 /* set new phy address */
2717 lp->mii_if.phy_id = i;
2718 return 1;
2719 }
2720 }
2721 }
2722 return 0;
2723}
2724
2725/*
2726 * Show the status of the media. Similar to mii_check_media however it
2727 * correctly shows the link speed for all (tested) pcnet32 variants.
2728 * Devices with no mii just report link state without speed.
2729 *
2730 * Caller is assumed to hold and release the lp->lock.
2731 */
2732
2733static void pcnet32_check_media(struct net_device *dev, int verbose)
2734{
2735 struct pcnet32_private *lp = netdev_priv(dev);
2736 int curr_link;
2737 int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2738 u32 bcr9;
2739
2740 if (lp->mii) {
2741 curr_link = mii_link_ok(&lp->mii_if);
2742 } else {
2743 ulong ioaddr = dev->base_addr; /* card base I/O address */
2744 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2745 }
2746 if (!curr_link) {
2747 if (prev_link || verbose) {
2748 netif_carrier_off(dev);
2749 netif_info(lp, link, dev, "link down\n");
2750 }
2751 if (lp->phycount > 1) {
2752 curr_link = pcnet32_check_otherphy(dev);
2753 prev_link = 0;
2754 }
2755 } else if (verbose || !prev_link) {
2756 netif_carrier_on(dev);
2757 if (lp->mii) {
2758 if (netif_msg_link(lp)) {
2759 struct ethtool_cmd ecmd = {
2760 .cmd = ETHTOOL_GSET };
2761 mii_ethtool_gset(&lp->mii_if, &ecmd);
2762 netdev_info(dev, "link up, %uMbps, %s-duplex\n",
2763 ethtool_cmd_speed(&ecmd),
2764 (ecmd.duplex == DUPLEX_FULL)
2765 ? "full" : "half");
2766 }
2767 bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2768 if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2769 if (lp->mii_if.full_duplex)
2770 bcr9 |= (1 << 0);
2771 else
2772 bcr9 &= ~(1 << 0);
2773 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2774 }
2775 } else {
2776 netif_info(lp, link, dev, "link up\n");
2777 }
2778 }
2779}
2780
2781/*
2782 * Check for loss of link and link establishment.
2783 * Can not use mii_check_media because it does nothing if mode is forced.
2784 */
2785
2786static void pcnet32_watchdog(struct net_device *dev)
2787{
2788 struct pcnet32_private *lp = netdev_priv(dev);
2789 unsigned long flags;
2790
2791 /* Print the link status if it has changed */
2792 spin_lock_irqsave(&lp->lock, flags);
2793 pcnet32_check_media(dev, 0);
2794 spin_unlock_irqrestore(&lp->lock, flags);
2795
2796 mod_timer(&lp->watchdog_timer, round_jiffies(PCNET32_WATCHDOG_TIMEOUT));
2797}
2798
2799static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
2800{
2801 struct net_device *dev = pci_get_drvdata(pdev);
2802
2803 if (netif_running(dev)) {
2804 netif_device_detach(dev);
2805 pcnet32_close(dev);
2806 }
2807 pci_save_state(pdev);
2808 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2809 return 0;
2810}
2811
2812static int pcnet32_pm_resume(struct pci_dev *pdev)
2813{
2814 struct net_device *dev = pci_get_drvdata(pdev);
2815
2816 pci_set_power_state(pdev, PCI_D0);
2817 pci_restore_state(pdev);
2818
2819 if (netif_running(dev)) {
2820 pcnet32_open(dev);
2821 netif_device_attach(dev);
2822 }
2823 return 0;
2824}
2825
2826static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2827{
2828 struct net_device *dev = pci_get_drvdata(pdev);
2829
2830 if (dev) {
2831 struct pcnet32_private *lp = netdev_priv(dev);
2832
2833 unregister_netdev(dev);
2834 pcnet32_free_ring(dev);
2835 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2836 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2837 lp->init_block, lp->init_dma_addr);
2838 free_netdev(dev);
2839 pci_disable_device(pdev);
2840 pci_set_drvdata(pdev, NULL);
2841 }
2842}
2843
2844static struct pci_driver pcnet32_driver = {
2845 .name = DRV_NAME,
2846 .probe = pcnet32_probe_pci,
2847 .remove = __devexit_p(pcnet32_remove_one),
2848 .id_table = pcnet32_pci_tbl,
2849 .suspend = pcnet32_pm_suspend,
2850 .resume = pcnet32_pm_resume,
2851};
2852
2853/* An additional parameter that may be passed in... */
2854static int debug = -1;
2855static int tx_start_pt = -1;
2856static int pcnet32_have_pci;
2857
2858module_param(debug, int, 0);
2859MODULE_PARM_DESC(debug, DRV_NAME " debug level");
2860module_param(max_interrupt_work, int, 0);
2861MODULE_PARM_DESC(max_interrupt_work,
2862 DRV_NAME " maximum events handled per interrupt");
2863module_param(rx_copybreak, int, 0);
2864MODULE_PARM_DESC(rx_copybreak,
2865 DRV_NAME " copy breakpoint for copy-only-tiny-frames");
2866module_param(tx_start_pt, int, 0);
2867MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
2868module_param(pcnet32vlb, int, 0);
2869MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
2870module_param_array(options, int, NULL, 0);
2871MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
2872module_param_array(full_duplex, int, NULL, 0);
2873MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
2874/* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
2875module_param_array(homepna, int, NULL, 0);
2876MODULE_PARM_DESC(homepna,
2877 DRV_NAME
2878 " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
2879
2880MODULE_AUTHOR("Thomas Bogendoerfer");
2881MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
2882MODULE_LICENSE("GPL");
2883
2884#define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
2885
2886static int __init pcnet32_init_module(void)
2887{
2888 pr_info("%s", version);
2889
2890 pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
2891
2892 if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
2893 tx_start = tx_start_pt;
2894
2895 /* find the PCI devices */
2896 if (!pci_register_driver(&pcnet32_driver))
2897 pcnet32_have_pci = 1;
2898
2899 /* should we find any remaining VLbus devices ? */
2900 if (pcnet32vlb)
2901 pcnet32_probe_vlbus(pcnet32_portlist);
2902
2903 if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
2904 pr_info("%d cards_found\n", cards_found);
2905
2906 return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
2907}
2908
2909static void __exit pcnet32_cleanup_module(void)
2910{
2911 struct net_device *next_dev;
2912
2913 while (pcnet32_dev) {
2914 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
2915 next_dev = lp->next;
2916 unregister_netdev(pcnet32_dev);
2917 pcnet32_free_ring(pcnet32_dev);
2918 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
2919 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2920 lp->init_block, lp->init_dma_addr);
2921 free_netdev(pcnet32_dev);
2922 pcnet32_dev = next_dev;
2923 }
2924
2925 if (pcnet32_have_pci)
2926 pci_unregister_driver(&pcnet32_driver);
2927}
2928
2929module_init(pcnet32_init_module);
2930module_exit(pcnet32_cleanup_module);
2931
2932/*
2933 * Local variables:
2934 * c-indent-level: 4
2935 * tab-width: 8
2936 * End:
2937 */