ni65.c 30 KB

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  1. /*
  2. * ni6510 (am7990 'lance' chip) driver for Linux-net-3
  3. * BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
  4. * copyrights (c) 1994,1995,1996 by M.Hipp
  5. *
  6. * This driver can handle the old ni6510 board and the newer ni6510
  7. * EtherBlaster. (probably it also works with every full NE2100
  8. * compatible card)
  9. *
  10. * To compile as module, type:
  11. * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni65.c
  12. * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
  13. *
  14. * This is an extension to the Linux operating system, and is covered by the
  15. * same GNU General Public License that covers the Linux-kernel.
  16. *
  17. * comments/bugs/suggestions can be sent to:
  18. * Michael Hipp
  19. * email: hippm@informatik.uni-tuebingen.de
  20. *
  21. * sources:
  22. * some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
  23. * and from the original drivers by D.Becker
  24. *
  25. * known problems:
  26. * - on some PCI boards (including my own) the card/board/ISA-bridge has
  27. * problems with bus master DMA. This results in lotsa overruns.
  28. * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
  29. * the XMT and RCV_VIA_SKB option .. this reduces driver performance.
  30. * Or just play with your BIOS options to optimize ISA-DMA access.
  31. * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
  32. * defines -> please report me your experience then
  33. * - Harald reported for ASUS SP3G mainboards, that you should use
  34. * the 'optimal settings' from the user's manual on page 3-12!
  35. *
  36. * credits:
  37. * thanx to Jason Sullivan for sending me a ni6510 card!
  38. * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
  39. *
  40. * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
  41. * average: FTP -> 8384421 bytes received in 8.5 seconds
  42. * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
  43. * peak: FTP -> 8384421 bytes received in 7.5 seconds
  44. * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
  45. */
  46. /*
  47. * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
  48. * 96.Sept.29: virt_to_bus stuff added for new memory modell
  49. * 96.April.29: Added Harald Koenig's Patches (MH)
  50. * 96.April.13: enhanced error handling .. more tests (MH)
  51. * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
  52. * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
  53. * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
  54. * hopefully no more 16MB limit
  55. *
  56. * 95.Nov.18: multicast tweaked (AC).
  57. *
  58. * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
  59. *
  60. * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
  61. */
  62. #include <linux/kernel.h>
  63. #include <linux/string.h>
  64. #include <linux/errno.h>
  65. #include <linux/ioport.h>
  66. #include <linux/slab.h>
  67. #include <linux/interrupt.h>
  68. #include <linux/delay.h>
  69. #include <linux/init.h>
  70. #include <linux/netdevice.h>
  71. #include <linux/etherdevice.h>
  72. #include <linux/skbuff.h>
  73. #include <linux/module.h>
  74. #include <linux/bitops.h>
  75. #include <asm/io.h>
  76. #include <asm/dma.h>
  77. #include "ni65.h"
  78. /*
  79. * the current setting allows an acceptable performance
  80. * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
  81. * the header of this file
  82. * 'invert' the defines for max. performance. This may cause DMA problems
  83. * on some boards (e.g on my ASUS SP3G)
  84. */
  85. #undef XMT_VIA_SKB
  86. #undef RCV_VIA_SKB
  87. #define RCV_PARANOIA_CHECK
  88. #define MID_PERFORMANCE
  89. #if defined( LOW_PERFORMANCE )
  90. static int isa0=7,isa1=7,csr80=0x0c10;
  91. #elif defined( MID_PERFORMANCE )
  92. static int isa0=5,isa1=5,csr80=0x2810;
  93. #else /* high performance */
  94. static int isa0=4,isa1=4,csr80=0x0017;
  95. #endif
  96. /*
  97. * a few card/vendor specific defines
  98. */
  99. #define NI65_ID0 0x00
  100. #define NI65_ID1 0x55
  101. #define NI65_EB_ID0 0x52
  102. #define NI65_EB_ID1 0x44
  103. #define NE2100_ID0 0x57
  104. #define NE2100_ID1 0x57
  105. #define PORT p->cmdr_addr
  106. /*
  107. * buffer configuration
  108. */
  109. #if 1
  110. #define RMDNUM 16
  111. #define RMDNUMMASK 0x80000000
  112. #else
  113. #define RMDNUM 8
  114. #define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
  115. #endif
  116. #if 0
  117. #define TMDNUM 1
  118. #define TMDNUMMASK 0x00000000
  119. #else
  120. #define TMDNUM 4
  121. #define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
  122. #endif
  123. /* slightly oversized */
  124. #define R_BUF_SIZE 1544
  125. #define T_BUF_SIZE 1544
  126. /*
  127. * lance register defines
  128. */
  129. #define L_DATAREG 0x00
  130. #define L_ADDRREG 0x02
  131. #define L_RESET 0x04
  132. #define L_CONFIG 0x05
  133. #define L_BUSIF 0x06
  134. /*
  135. * to access the lance/am7990-regs, you have to write
  136. * reg-number into L_ADDRREG, then you can access it using L_DATAREG
  137. */
  138. #define CSR0 0x00
  139. #define CSR1 0x01
  140. #define CSR2 0x02
  141. #define CSR3 0x03
  142. #define INIT_RING_BEFORE_START 0x1
  143. #define FULL_RESET_ON_ERROR 0x2
  144. #if 0
  145. #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
  146. outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
  147. #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
  148. inw(PORT+L_DATAREG))
  149. #if 0
  150. #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
  151. #else
  152. #define writedatareg(val) { writereg(val,CSR0); }
  153. #endif
  154. #else
  155. #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
  156. #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
  157. #define writedatareg(val) { writereg(val,CSR0); }
  158. #endif
  159. static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
  160. static struct card {
  161. unsigned char id0,id1;
  162. short id_offset;
  163. short total_size;
  164. short cmd_offset;
  165. short addr_offset;
  166. unsigned char *vendor_id;
  167. char *cardname;
  168. long config;
  169. } cards[] = {
  170. {
  171. .id0 = NI65_ID0,
  172. .id1 = NI65_ID1,
  173. .id_offset = 0x0e,
  174. .total_size = 0x10,
  175. .cmd_offset = 0x0,
  176. .addr_offset = 0x8,
  177. .vendor_id = ni_vendor,
  178. .cardname = "ni6510",
  179. .config = 0x1,
  180. },
  181. {
  182. .id0 = NI65_EB_ID0,
  183. .id1 = NI65_EB_ID1,
  184. .id_offset = 0x0e,
  185. .total_size = 0x18,
  186. .cmd_offset = 0x10,
  187. .addr_offset = 0x0,
  188. .vendor_id = ni_vendor,
  189. .cardname = "ni6510 EtherBlaster",
  190. .config = 0x2,
  191. },
  192. {
  193. .id0 = NE2100_ID0,
  194. .id1 = NE2100_ID1,
  195. .id_offset = 0x0e,
  196. .total_size = 0x18,
  197. .cmd_offset = 0x10,
  198. .addr_offset = 0x0,
  199. .vendor_id = NULL,
  200. .cardname = "generic NE2100",
  201. .config = 0x0,
  202. },
  203. };
  204. #define NUM_CARDS 3
  205. struct priv
  206. {
  207. struct rmd rmdhead[RMDNUM];
  208. struct tmd tmdhead[TMDNUM];
  209. struct init_block ib;
  210. int rmdnum;
  211. int tmdnum,tmdlast;
  212. #ifdef RCV_VIA_SKB
  213. struct sk_buff *recv_skb[RMDNUM];
  214. #else
  215. void *recvbounce[RMDNUM];
  216. #endif
  217. #ifdef XMT_VIA_SKB
  218. struct sk_buff *tmd_skb[TMDNUM];
  219. #endif
  220. void *tmdbounce[TMDNUM];
  221. int tmdbouncenum;
  222. int lock,xmit_queued;
  223. struct net_device_stats stats;
  224. void *self;
  225. int cmdr_addr;
  226. int cardno;
  227. int features;
  228. spinlock_t ring_lock;
  229. };
  230. static int ni65_probe1(struct net_device *dev,int);
  231. static irqreturn_t ni65_interrupt(int irq, void * dev_id);
  232. static void ni65_recv_intr(struct net_device *dev,int);
  233. static void ni65_xmit_intr(struct net_device *dev,int);
  234. static int ni65_open(struct net_device *dev);
  235. static int ni65_lance_reinit(struct net_device *dev);
  236. static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
  237. static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev);
  238. static void ni65_timeout(struct net_device *dev);
  239. static int ni65_close(struct net_device *dev);
  240. static int ni65_alloc_buffer(struct net_device *dev);
  241. static void ni65_free_buffer(struct priv *p);
  242. static struct net_device_stats *ni65_get_stats(struct net_device *);
  243. static void set_multicast_list(struct net_device *dev);
  244. static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
  245. static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
  246. static int debuglevel = 1;
  247. /*
  248. * set 'performance' registers .. we must STOP lance for that
  249. */
  250. static void ni65_set_performance(struct priv *p)
  251. {
  252. writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
  253. if( !(cards[p->cardno].config & 0x02) )
  254. return;
  255. outw(80,PORT+L_ADDRREG);
  256. if(inw(PORT+L_ADDRREG) != 80)
  257. return;
  258. writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
  259. outw(0,PORT+L_ADDRREG);
  260. outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
  261. outw(1,PORT+L_ADDRREG);
  262. outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
  263. outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
  264. }
  265. /*
  266. * open interface (up)
  267. */
  268. static int ni65_open(struct net_device *dev)
  269. {
  270. struct priv *p = (struct priv *) dev->priv;
  271. int irqval = request_irq(dev->irq, &ni65_interrupt,0,
  272. cards[p->cardno].cardname,dev);
  273. if (irqval) {
  274. printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
  275. dev->name,dev->irq, irqval);
  276. return -EAGAIN;
  277. }
  278. if(ni65_lance_reinit(dev))
  279. {
  280. netif_start_queue(dev);
  281. return 0;
  282. }
  283. else
  284. {
  285. free_irq(dev->irq,dev);
  286. return -EAGAIN;
  287. }
  288. }
  289. /*
  290. * close interface (down)
  291. */
  292. static int ni65_close(struct net_device *dev)
  293. {
  294. struct priv *p = (struct priv *) dev->priv;
  295. netif_stop_queue(dev);
  296. outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
  297. #ifdef XMT_VIA_SKB
  298. {
  299. int i;
  300. for(i=0;i<TMDNUM;i++)
  301. {
  302. if(p->tmd_skb[i]) {
  303. dev_kfree_skb(p->tmd_skb[i]);
  304. p->tmd_skb[i] = NULL;
  305. }
  306. }
  307. }
  308. #endif
  309. free_irq(dev->irq,dev);
  310. return 0;
  311. }
  312. static void cleanup_card(struct net_device *dev)
  313. {
  314. struct priv *p = (struct priv *) dev->priv;
  315. disable_dma(dev->dma);
  316. free_dma(dev->dma);
  317. release_region(dev->base_addr, cards[p->cardno].total_size);
  318. ni65_free_buffer(p);
  319. }
  320. /* set: io,irq,dma or set it when calling insmod */
  321. static int irq;
  322. static int io;
  323. static int dma;
  324. /*
  325. * Probe The Card (not the lance-chip)
  326. */
  327. struct net_device * __init ni65_probe(int unit)
  328. {
  329. struct net_device *dev = alloc_etherdev(0);
  330. static int ports[] = {0x360,0x300,0x320,0x340, 0};
  331. int *port;
  332. int err = 0;
  333. if (!dev)
  334. return ERR_PTR(-ENOMEM);
  335. if (unit >= 0) {
  336. sprintf(dev->name, "eth%d", unit);
  337. netdev_boot_setup_check(dev);
  338. irq = dev->irq;
  339. dma = dev->dma;
  340. } else {
  341. dev->base_addr = io;
  342. }
  343. if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
  344. err = ni65_probe1(dev, dev->base_addr);
  345. } else if (dev->base_addr > 0) { /* Don't probe at all. */
  346. err = -ENXIO;
  347. } else {
  348. for (port = ports; *port && ni65_probe1(dev, *port); port++)
  349. ;
  350. if (!*port)
  351. err = -ENODEV;
  352. }
  353. if (err)
  354. goto out;
  355. err = register_netdev(dev);
  356. if (err)
  357. goto out1;
  358. return dev;
  359. out1:
  360. cleanup_card(dev);
  361. out:
  362. free_netdev(dev);
  363. return ERR_PTR(err);
  364. }
  365. /*
  366. * this is the real card probe ..
  367. */
  368. static int __init ni65_probe1(struct net_device *dev,int ioaddr)
  369. {
  370. int i,j;
  371. struct priv *p;
  372. unsigned long flags;
  373. dev->irq = irq;
  374. dev->dma = dma;
  375. for(i=0;i<NUM_CARDS;i++) {
  376. if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
  377. continue;
  378. if(cards[i].id_offset >= 0) {
  379. if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
  380. inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
  381. release_region(ioaddr, cards[i].total_size);
  382. continue;
  383. }
  384. }
  385. if(cards[i].vendor_id) {
  386. for(j=0;j<3;j++)
  387. if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
  388. release_region(ioaddr, cards[i].total_size);
  389. continue;
  390. }
  391. }
  392. break;
  393. }
  394. if(i == NUM_CARDS)
  395. return -ENODEV;
  396. for(j=0;j<6;j++)
  397. dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
  398. if( (j=ni65_alloc_buffer(dev)) < 0) {
  399. release_region(ioaddr, cards[i].total_size);
  400. return j;
  401. }
  402. p = (struct priv *) dev->priv;
  403. p->cmdr_addr = ioaddr + cards[i].cmd_offset;
  404. p->cardno = i;
  405. spin_lock_init(&p->ring_lock);
  406. printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
  407. outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
  408. if( (j=readreg(CSR0)) != 0x4) {
  409. printk("failed.\n");
  410. printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
  411. ni65_free_buffer(p);
  412. release_region(ioaddr, cards[p->cardno].total_size);
  413. return -EAGAIN;
  414. }
  415. outw(88,PORT+L_ADDRREG);
  416. if(inw(PORT+L_ADDRREG) == 88) {
  417. unsigned long v;
  418. v = inw(PORT+L_DATAREG);
  419. v <<= 16;
  420. outw(89,PORT+L_ADDRREG);
  421. v |= inw(PORT+L_DATAREG);
  422. printk("Version %#08lx, ",v);
  423. p->features = INIT_RING_BEFORE_START;
  424. }
  425. else {
  426. printk("ancient LANCE, ");
  427. p->features = 0x0;
  428. }
  429. if(test_bit(0,&cards[i].config)) {
  430. dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
  431. dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
  432. printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
  433. }
  434. else {
  435. if(dev->dma == 0) {
  436. /* 'stuck test' from lance.c */
  437. long dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
  438. (inb(DMA2_STAT_REG) & 0xf0);
  439. for(i=1;i<5;i++) {
  440. int dma = dmatab[i];
  441. if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
  442. continue;
  443. flags=claim_dma_lock();
  444. disable_dma(dma);
  445. set_dma_mode(dma,DMA_MODE_CASCADE);
  446. enable_dma(dma);
  447. release_dma_lock(flags);
  448. ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
  449. flags=claim_dma_lock();
  450. disable_dma(dma);
  451. free_dma(dma);
  452. release_dma_lock(flags);
  453. if(readreg(CSR0) & CSR0_IDON)
  454. break;
  455. }
  456. if(i == 5) {
  457. printk("failed.\n");
  458. printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
  459. ni65_free_buffer(p);
  460. release_region(ioaddr, cards[p->cardno].total_size);
  461. return -EAGAIN;
  462. }
  463. dev->dma = dmatab[i];
  464. printk("DMA %d (autodetected), ",dev->dma);
  465. }
  466. else
  467. printk("DMA %d (assigned), ",dev->dma);
  468. if(dev->irq < 2)
  469. {
  470. unsigned long irq_mask;
  471. ni65_init_lance(p,dev->dev_addr,0,0);
  472. irq_mask = probe_irq_on();
  473. writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
  474. msleep(20);
  475. dev->irq = probe_irq_off(irq_mask);
  476. if(!dev->irq)
  477. {
  478. printk("Failed to detect IRQ line!\n");
  479. ni65_free_buffer(p);
  480. release_region(ioaddr, cards[p->cardno].total_size);
  481. return -EAGAIN;
  482. }
  483. printk("IRQ %d (autodetected).\n",dev->irq);
  484. }
  485. else
  486. printk("IRQ %d (assigned).\n",dev->irq);
  487. }
  488. if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
  489. {
  490. printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
  491. ni65_free_buffer(p);
  492. release_region(ioaddr, cards[p->cardno].total_size);
  493. return -EAGAIN;
  494. }
  495. dev->base_addr = ioaddr;
  496. SET_MODULE_OWNER(dev);
  497. dev->open = ni65_open;
  498. dev->stop = ni65_close;
  499. dev->hard_start_xmit = ni65_send_packet;
  500. dev->tx_timeout = ni65_timeout;
  501. dev->watchdog_timeo = HZ/2;
  502. dev->get_stats = ni65_get_stats;
  503. dev->set_multicast_list = set_multicast_list;
  504. return 0; /* everything is OK */
  505. }
  506. /*
  507. * set lance register and trigger init
  508. */
  509. static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
  510. {
  511. int i;
  512. u32 pib;
  513. writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
  514. for(i=0;i<6;i++)
  515. p->ib.eaddr[i] = daddr[i];
  516. for(i=0;i<8;i++)
  517. p->ib.filter[i] = filter;
  518. p->ib.mode = mode;
  519. p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
  520. p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
  521. writereg(0,CSR3); /* busmaster/no word-swap */
  522. pib = (u32) isa_virt_to_bus(&p->ib);
  523. writereg(pib & 0xffff,CSR1);
  524. writereg(pib >> 16,CSR2);
  525. writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
  526. for(i=0;i<32;i++)
  527. {
  528. mdelay(4);
  529. if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
  530. break; /* init ok ? */
  531. }
  532. }
  533. /*
  534. * allocate memory area and check the 16MB border
  535. */
  536. static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
  537. {
  538. struct sk_buff *skb=NULL;
  539. unsigned char *ptr;
  540. void *ret;
  541. if(type) {
  542. ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
  543. if(!skb) {
  544. printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
  545. return NULL;
  546. }
  547. skb->dev = dev;
  548. skb_reserve(skb,2+16);
  549. skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
  550. ptr = skb->data;
  551. }
  552. else {
  553. ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
  554. if(!ret) {
  555. printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
  556. return NULL;
  557. }
  558. }
  559. if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
  560. printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
  561. if(type)
  562. kfree_skb(skb);
  563. else
  564. kfree(ptr);
  565. return NULL;
  566. }
  567. return ret;
  568. }
  569. /*
  570. * allocate all memory structures .. send/recv buffers etc ...
  571. */
  572. static int ni65_alloc_buffer(struct net_device *dev)
  573. {
  574. unsigned char *ptr;
  575. struct priv *p;
  576. int i;
  577. /*
  578. * we need 8-aligned memory ..
  579. */
  580. ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
  581. if(!ptr)
  582. return -ENOMEM;
  583. p = dev->priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
  584. memset((char *) dev->priv,0,sizeof(struct priv));
  585. p->self = ptr;
  586. for(i=0;i<TMDNUM;i++)
  587. {
  588. #ifdef XMT_VIA_SKB
  589. p->tmd_skb[i] = NULL;
  590. #endif
  591. p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
  592. if(!p->tmdbounce[i]) {
  593. ni65_free_buffer(p);
  594. return -ENOMEM;
  595. }
  596. }
  597. for(i=0;i<RMDNUM;i++)
  598. {
  599. #ifdef RCV_VIA_SKB
  600. p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
  601. if(!p->recv_skb[i]) {
  602. ni65_free_buffer(p);
  603. return -ENOMEM;
  604. }
  605. #else
  606. p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
  607. if(!p->recvbounce[i]) {
  608. ni65_free_buffer(p);
  609. return -ENOMEM;
  610. }
  611. #endif
  612. }
  613. return 0; /* everything is OK */
  614. }
  615. /*
  616. * free buffers and private struct
  617. */
  618. static void ni65_free_buffer(struct priv *p)
  619. {
  620. int i;
  621. if(!p)
  622. return;
  623. for(i=0;i<TMDNUM;i++) {
  624. kfree(p->tmdbounce[i]);
  625. #ifdef XMT_VIA_SKB
  626. if(p->tmd_skb[i])
  627. dev_kfree_skb(p->tmd_skb[i]);
  628. #endif
  629. }
  630. for(i=0;i<RMDNUM;i++)
  631. {
  632. #ifdef RCV_VIA_SKB
  633. if(p->recv_skb[i])
  634. dev_kfree_skb(p->recv_skb[i]);
  635. #else
  636. kfree(p->recvbounce[i]);
  637. #endif
  638. }
  639. kfree(p->self);
  640. }
  641. /*
  642. * stop and (re)start lance .. e.g after an error
  643. */
  644. static void ni65_stop_start(struct net_device *dev,struct priv *p)
  645. {
  646. int csr0 = CSR0_INEA;
  647. writedatareg(CSR0_STOP);
  648. if(debuglevel > 1)
  649. printk(KERN_DEBUG "ni65_stop_start\n");
  650. if(p->features & INIT_RING_BEFORE_START) {
  651. int i;
  652. #ifdef XMT_VIA_SKB
  653. struct sk_buff *skb_save[TMDNUM];
  654. #endif
  655. unsigned long buffer[TMDNUM];
  656. short blen[TMDNUM];
  657. if(p->xmit_queued) {
  658. while(1) {
  659. if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
  660. break;
  661. p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
  662. if(p->tmdlast == p->tmdnum)
  663. break;
  664. }
  665. }
  666. for(i=0;i<TMDNUM;i++) {
  667. struct tmd *tmdp = p->tmdhead + i;
  668. #ifdef XMT_VIA_SKB
  669. skb_save[i] = p->tmd_skb[i];
  670. #endif
  671. buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
  672. blen[i] = tmdp->blen;
  673. tmdp->u.s.status = 0x0;
  674. }
  675. for(i=0;i<RMDNUM;i++) {
  676. struct rmd *rmdp = p->rmdhead + i;
  677. rmdp->u.s.status = RCV_OWN;
  678. }
  679. p->tmdnum = p->xmit_queued = 0;
  680. writedatareg(CSR0_STRT | csr0);
  681. for(i=0;i<TMDNUM;i++) {
  682. int num = (i + p->tmdlast) & (TMDNUM-1);
  683. p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
  684. p->tmdhead[i].blen = blen[num];
  685. if(p->tmdhead[i].u.s.status & XMIT_OWN) {
  686. p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
  687. p->xmit_queued = 1;
  688. writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
  689. }
  690. #ifdef XMT_VIA_SKB
  691. p->tmd_skb[i] = skb_save[num];
  692. #endif
  693. }
  694. p->rmdnum = p->tmdlast = 0;
  695. if(!p->lock)
  696. if (p->tmdnum || !p->xmit_queued)
  697. netif_wake_queue(dev);
  698. dev->trans_start = jiffies;
  699. }
  700. else
  701. writedatareg(CSR0_STRT | csr0);
  702. }
  703. /*
  704. * init lance (write init-values .. init-buffers) (open-helper)
  705. */
  706. static int ni65_lance_reinit(struct net_device *dev)
  707. {
  708. int i;
  709. struct priv *p = (struct priv *) dev->priv;
  710. unsigned long flags;
  711. p->lock = 0;
  712. p->xmit_queued = 0;
  713. flags=claim_dma_lock();
  714. disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
  715. set_dma_mode(dev->dma,DMA_MODE_CASCADE);
  716. enable_dma(dev->dma);
  717. release_dma_lock(flags);
  718. outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
  719. if( (i=readreg(CSR0) ) != 0x4)
  720. {
  721. printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
  722. cards[p->cardno].cardname,(int) i);
  723. flags=claim_dma_lock();
  724. disable_dma(dev->dma);
  725. release_dma_lock(flags);
  726. return 0;
  727. }
  728. p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
  729. for(i=0;i<TMDNUM;i++)
  730. {
  731. struct tmd *tmdp = p->tmdhead + i;
  732. #ifdef XMT_VIA_SKB
  733. if(p->tmd_skb[i]) {
  734. dev_kfree_skb(p->tmd_skb[i]);
  735. p->tmd_skb[i] = NULL;
  736. }
  737. #endif
  738. tmdp->u.buffer = 0x0;
  739. tmdp->u.s.status = XMIT_START | XMIT_END;
  740. tmdp->blen = tmdp->status2 = 0;
  741. }
  742. for(i=0;i<RMDNUM;i++)
  743. {
  744. struct rmd *rmdp = p->rmdhead + i;
  745. #ifdef RCV_VIA_SKB
  746. rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
  747. #else
  748. rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
  749. #endif
  750. rmdp->blen = -(R_BUF_SIZE-8);
  751. rmdp->mlen = 0;
  752. rmdp->u.s.status = RCV_OWN;
  753. }
  754. if(dev->flags & IFF_PROMISC)
  755. ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
  756. else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
  757. ni65_init_lance(p,dev->dev_addr,0xff,0x0);
  758. else
  759. ni65_init_lance(p,dev->dev_addr,0x00,0x00);
  760. /*
  761. * ni65_set_lance_mem() sets L_ADDRREG to CSR0
  762. * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
  763. */
  764. if(inw(PORT+L_DATAREG) & CSR0_IDON) {
  765. ni65_set_performance(p);
  766. /* init OK: start lance , enable interrupts */
  767. writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
  768. return 1; /* ->OK */
  769. }
  770. printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
  771. flags=claim_dma_lock();
  772. disable_dma(dev->dma);
  773. release_dma_lock(flags);
  774. return 0; /* ->Error */
  775. }
  776. /*
  777. * interrupt handler
  778. */
  779. static irqreturn_t ni65_interrupt(int irq, void * dev_id)
  780. {
  781. int csr0 = 0;
  782. struct net_device *dev = dev_id;
  783. struct priv *p;
  784. int bcnt = 32;
  785. p = (struct priv *) dev->priv;
  786. spin_lock(&p->ring_lock);
  787. while(--bcnt) {
  788. csr0 = inw(PORT+L_DATAREG);
  789. #if 0
  790. writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
  791. #else
  792. writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
  793. #endif
  794. if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
  795. break;
  796. if(csr0 & CSR0_RINT) /* RECV-int? */
  797. ni65_recv_intr(dev,csr0);
  798. if(csr0 & CSR0_TINT) /* XMIT-int? */
  799. ni65_xmit_intr(dev,csr0);
  800. if(csr0 & CSR0_ERR)
  801. {
  802. struct priv *p = (struct priv *) dev->priv;
  803. if(debuglevel > 1)
  804. printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
  805. if(csr0 & CSR0_BABL)
  806. p->stats.tx_errors++;
  807. if(csr0 & CSR0_MISS) {
  808. int i;
  809. for(i=0;i<RMDNUM;i++)
  810. printk("%02x ",p->rmdhead[i].u.s.status);
  811. printk("\n");
  812. p->stats.rx_errors++;
  813. }
  814. if(csr0 & CSR0_MERR) {
  815. if(debuglevel > 1)
  816. printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
  817. ni65_stop_start(dev,p);
  818. }
  819. }
  820. }
  821. #ifdef RCV_PARANOIA_CHECK
  822. {
  823. int j;
  824. for(j=0;j<RMDNUM;j++)
  825. {
  826. struct priv *p = (struct priv *) dev->priv;
  827. int i,k,num1,num2;
  828. for(i=RMDNUM-1;i>0;i--) {
  829. num2 = (p->rmdnum + i) & (RMDNUM-1);
  830. if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
  831. break;
  832. }
  833. if(i) {
  834. for(k=0;k<RMDNUM;k++) {
  835. num1 = (p->rmdnum + k) & (RMDNUM-1);
  836. if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
  837. break;
  838. }
  839. if(!k)
  840. break;
  841. if(debuglevel > 0)
  842. {
  843. char buf[256],*buf1;
  844. int k;
  845. buf1 = buf;
  846. for(k=0;k<RMDNUM;k++) {
  847. sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
  848. buf1 += 3;
  849. }
  850. *buf1 = 0;
  851. printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
  852. }
  853. p->rmdnum = num1;
  854. ni65_recv_intr(dev,csr0);
  855. if((p->rmdhead[num2].u.s.status & RCV_OWN))
  856. break; /* ok, we are 'in sync' again */
  857. }
  858. else
  859. break;
  860. }
  861. }
  862. #endif
  863. if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
  864. printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
  865. ni65_stop_start(dev,p);
  866. }
  867. else
  868. writedatareg(CSR0_INEA);
  869. spin_unlock(&p->ring_lock);
  870. return IRQ_HANDLED;
  871. }
  872. /*
  873. * We have received an Xmit-Interrupt ..
  874. * send a new packet if necessary
  875. */
  876. static void ni65_xmit_intr(struct net_device *dev,int csr0)
  877. {
  878. struct priv *p = (struct priv *) dev->priv;
  879. while(p->xmit_queued)
  880. {
  881. struct tmd *tmdp = p->tmdhead + p->tmdlast;
  882. int tmdstat = tmdp->u.s.status;
  883. if(tmdstat & XMIT_OWN)
  884. break;
  885. if(tmdstat & XMIT_ERR)
  886. {
  887. #if 0
  888. if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
  889. printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
  890. #endif
  891. /* checking some errors */
  892. if(tmdp->status2 & XMIT_RTRY)
  893. p->stats.tx_aborted_errors++;
  894. if(tmdp->status2 & XMIT_LCAR)
  895. p->stats.tx_carrier_errors++;
  896. if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
  897. /* this stops the xmitter */
  898. p->stats.tx_fifo_errors++;
  899. if(debuglevel > 0)
  900. printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
  901. if(p->features & INIT_RING_BEFORE_START) {
  902. tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
  903. ni65_stop_start(dev,p);
  904. break; /* no more Xmit processing .. */
  905. }
  906. else
  907. ni65_stop_start(dev,p);
  908. }
  909. if(debuglevel > 2)
  910. printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
  911. if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
  912. p->stats.tx_errors++;
  913. tmdp->status2 = 0;
  914. }
  915. else {
  916. p->stats.tx_bytes -= (short)(tmdp->blen);
  917. p->stats.tx_packets++;
  918. }
  919. #ifdef XMT_VIA_SKB
  920. if(p->tmd_skb[p->tmdlast]) {
  921. dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
  922. p->tmd_skb[p->tmdlast] = NULL;
  923. }
  924. #endif
  925. p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
  926. if(p->tmdlast == p->tmdnum)
  927. p->xmit_queued = 0;
  928. }
  929. netif_wake_queue(dev);
  930. }
  931. /*
  932. * We have received a packet
  933. */
  934. static void ni65_recv_intr(struct net_device *dev,int csr0)
  935. {
  936. struct rmd *rmdp;
  937. int rmdstat,len;
  938. int cnt=0;
  939. struct priv *p = (struct priv *) dev->priv;
  940. rmdp = p->rmdhead + p->rmdnum;
  941. while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
  942. {
  943. cnt++;
  944. if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
  945. {
  946. if(!(rmdstat & RCV_ERR)) {
  947. if(rmdstat & RCV_START)
  948. {
  949. p->stats.rx_length_errors++;
  950. printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
  951. }
  952. }
  953. else {
  954. if(debuglevel > 2)
  955. printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
  956. dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
  957. if(rmdstat & RCV_FRAM)
  958. p->stats.rx_frame_errors++;
  959. if(rmdstat & RCV_OFLO)
  960. p->stats.rx_over_errors++;
  961. if(rmdstat & RCV_CRC)
  962. p->stats.rx_crc_errors++;
  963. if(rmdstat & RCV_BUF_ERR)
  964. p->stats.rx_fifo_errors++;
  965. }
  966. if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
  967. p->stats.rx_errors++;
  968. }
  969. else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
  970. {
  971. #ifdef RCV_VIA_SKB
  972. struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
  973. if (skb)
  974. skb_reserve(skb,16);
  975. #else
  976. struct sk_buff *skb = dev_alloc_skb(len+2);
  977. #endif
  978. if(skb)
  979. {
  980. skb_reserve(skb,2);
  981. skb->dev = dev;
  982. #ifdef RCV_VIA_SKB
  983. if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
  984. skb_put(skb,len);
  985. eth_copy_and_sum(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len,0);
  986. }
  987. else {
  988. struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
  989. skb_put(skb,R_BUF_SIZE);
  990. p->recv_skb[p->rmdnum] = skb;
  991. rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
  992. skb = skb1;
  993. skb_trim(skb,len);
  994. }
  995. #else
  996. skb_put(skb,len);
  997. eth_copy_and_sum(skb, (unsigned char *) p->recvbounce[p->rmdnum],len,0);
  998. #endif
  999. p->stats.rx_packets++;
  1000. p->stats.rx_bytes += len;
  1001. skb->protocol=eth_type_trans(skb,dev);
  1002. netif_rx(skb);
  1003. dev->last_rx = jiffies;
  1004. }
  1005. else
  1006. {
  1007. printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
  1008. p->stats.rx_dropped++;
  1009. }
  1010. }
  1011. else {
  1012. printk(KERN_INFO "%s: received runt packet\n",dev->name);
  1013. p->stats.rx_errors++;
  1014. }
  1015. rmdp->blen = -(R_BUF_SIZE-8);
  1016. rmdp->mlen = 0;
  1017. rmdp->u.s.status = RCV_OWN; /* change owner */
  1018. p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
  1019. rmdp = p->rmdhead + p->rmdnum;
  1020. }
  1021. }
  1022. /*
  1023. * kick xmitter ..
  1024. */
  1025. static void ni65_timeout(struct net_device *dev)
  1026. {
  1027. int i;
  1028. struct priv *p = (struct priv *) dev->priv;
  1029. printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
  1030. for(i=0;i<TMDNUM;i++)
  1031. printk("%02x ",p->tmdhead[i].u.s.status);
  1032. printk("\n");
  1033. ni65_lance_reinit(dev);
  1034. dev->trans_start = jiffies;
  1035. netif_wake_queue(dev);
  1036. }
  1037. /*
  1038. * Send a packet
  1039. */
  1040. static int ni65_send_packet(struct sk_buff *skb, struct net_device *dev)
  1041. {
  1042. struct priv *p = (struct priv *) dev->priv;
  1043. netif_stop_queue(dev);
  1044. if (test_and_set_bit(0, (void*)&p->lock)) {
  1045. printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
  1046. return 1;
  1047. }
  1048. {
  1049. short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
  1050. struct tmd *tmdp;
  1051. unsigned long flags;
  1052. #ifdef XMT_VIA_SKB
  1053. if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
  1054. #endif
  1055. memcpy((char *) p->tmdbounce[p->tmdbouncenum] ,(char *)skb->data,
  1056. (skb->len > T_BUF_SIZE) ? T_BUF_SIZE : skb->len);
  1057. if (len > skb->len)
  1058. memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
  1059. dev_kfree_skb (skb);
  1060. spin_lock_irqsave(&p->ring_lock, flags);
  1061. tmdp = p->tmdhead + p->tmdnum;
  1062. tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
  1063. p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
  1064. #ifdef XMT_VIA_SKB
  1065. }
  1066. else {
  1067. spin_lock_irqsave(&p->ring_lock, flags);
  1068. tmdp = p->tmdhead + p->tmdnum;
  1069. tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
  1070. p->tmd_skb[p->tmdnum] = skb;
  1071. }
  1072. #endif
  1073. tmdp->blen = -len;
  1074. tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
  1075. writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
  1076. p->xmit_queued = 1;
  1077. p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
  1078. if(p->tmdnum != p->tmdlast)
  1079. netif_wake_queue(dev);
  1080. p->lock = 0;
  1081. dev->trans_start = jiffies;
  1082. spin_unlock_irqrestore(&p->ring_lock, flags);
  1083. }
  1084. return 0;
  1085. }
  1086. static struct net_device_stats *ni65_get_stats(struct net_device *dev)
  1087. {
  1088. #if 0
  1089. int i;
  1090. struct priv *p = (struct priv *) dev->priv;
  1091. for(i=0;i<RMDNUM;i++)
  1092. {
  1093. struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
  1094. printk("%02x ",rmdp->u.s.status);
  1095. }
  1096. printk("\n");
  1097. #endif
  1098. return &((struct priv *) dev->priv)->stats;
  1099. }
  1100. static void set_multicast_list(struct net_device *dev)
  1101. {
  1102. if(!ni65_lance_reinit(dev))
  1103. printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
  1104. netif_wake_queue(dev);
  1105. }
  1106. #ifdef MODULE
  1107. static struct net_device *dev_ni65;
  1108. module_param(irq, int, 0);
  1109. module_param(io, int, 0);
  1110. module_param(dma, int, 0);
  1111. MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
  1112. MODULE_PARM_DESC(io, "ni6510 I/O base address");
  1113. MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
  1114. int __init init_module(void)
  1115. {
  1116. dev_ni65 = ni65_probe(-1);
  1117. return IS_ERR(dev_ni65) ? PTR_ERR(dev_ni65) : 0;
  1118. }
  1119. void __exit cleanup_module(void)
  1120. {
  1121. unregister_netdev(dev_ni65);
  1122. cleanup_card(dev_ni65);
  1123. free_netdev(dev_ni65);
  1124. }
  1125. #endif /* MODULE */
  1126. MODULE_LICENSE("GPL");
  1127. /*
  1128. * END of ni65.c
  1129. */