eni.c 61 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
  3. /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
  4. #include <linux/module.h>
  5. #include <linux/kernel.h>
  6. #include <linux/mm.h>
  7. #include <linux/pci.h>
  8. #include <linux/errno.h>
  9. #include <linux/atm.h>
  10. #include <linux/atmdev.h>
  11. #include <linux/sonet.h>
  12. #include <linux/skbuff.h>
  13. #include <linux/time.h>
  14. #include <linux/delay.h>
  15. #include <linux/uio.h>
  16. #include <linux/init.h>
  17. #include <linux/atm_eni.h>
  18. #include <linux/bitops.h>
  19. #include <linux/slab.h>
  20. #include <asm/io.h>
  21. #include <linux/atomic.h>
  22. #include <linux/uaccess.h>
  23. #include <asm/string.h>
  24. #include <asm/byteorder.h>
  25. #include "tonga.h"
  26. #include "midway.h"
  27. #include "suni.h"
  28. #include "eni.h"
  29. /*
  30. * TODO:
  31. *
  32. * Show stoppers
  33. * none
  34. *
  35. * Minor
  36. * - OAM support
  37. * - fix bugs listed below
  38. */
  39. /*
  40. * KNOWN BUGS:
  41. *
  42. * - may run into JK-JK bug and deadlock
  43. * - should allocate UBR channel first
  44. * - buffer space allocation algorithm is stupid
  45. * (RX: should be maxSDU+maxdelay*rate
  46. * TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  47. * - doesn't support OAM cells
  48. * - eni_put_free may hang if not putting memory fragments that _complete_
  49. * 2^n block (never happens in real life, though)
  50. */
  51. #if 0
  52. #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  53. #else
  54. #define DPRINTK(format,args...)
  55. #endif
  56. #ifndef CONFIG_ATM_ENI_TUNE_BURST
  57. #define CONFIG_ATM_ENI_BURST_TX_8W
  58. #define CONFIG_ATM_ENI_BURST_RX_4W
  59. #endif
  60. #ifndef CONFIG_ATM_ENI_DEBUG
  61. #define NULLCHECK(x)
  62. #define EVENT(s,a,b)
  63. static void event_dump(void)
  64. {
  65. }
  66. #else
  67. /*
  68. * NULL pointer checking
  69. */
  70. #define NULLCHECK(x) \
  71. if ((unsigned long) (x) < 0x30) \
  72. printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
  73. /*
  74. * Very extensive activity logging. Greatly improves bug detection speed but
  75. * costs a few Mbps if enabled.
  76. */
  77. #define EV 64
  78. static const char *ev[EV];
  79. static unsigned long ev_a[EV],ev_b[EV];
  80. static int ec = 0;
  81. static void EVENT(const char *s,unsigned long a,unsigned long b)
  82. {
  83. ev[ec] = s;
  84. ev_a[ec] = a;
  85. ev_b[ec] = b;
  86. ec = (ec+1) % EV;
  87. }
  88. static void event_dump(void)
  89. {
  90. int n,i;
  91. for (n = 0; n < EV; n++) {
  92. i = (ec+n) % EV;
  93. printk(KERN_NOTICE);
  94. printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
  95. }
  96. }
  97. #endif /* CONFIG_ATM_ENI_DEBUG */
  98. /*
  99. * NExx must not be equal at end
  100. * EExx may be equal at end
  101. * xxPJOK verify validity of pointer jumps
  102. * xxPMOK operating on a circular buffer of "c" words
  103. */
  104. #define NEPJOK(a0,a1,b) \
  105. ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
  106. #define EEPJOK(a0,a1,b) \
  107. ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
  108. #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
  109. #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
  110. static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
  111. backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
  112. putting = 0;
  113. static struct atm_dev *eni_boards = NULL;
  114. /* Read/write registers on card */
  115. #define eni_in(r) readl(eni_dev->reg+(r)*4)
  116. #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4)
  117. /*-------------------------------- utilities --------------------------------*/
  118. static void dump_mem(struct eni_dev *eni_dev)
  119. {
  120. int i;
  121. for (i = 0; i < eni_dev->free_len; i++)
  122. printk(KERN_DEBUG " %d: %p %d\n",i,
  123. eni_dev->free_list[i].start,
  124. 1 << eni_dev->free_list[i].order);
  125. }
  126. static void dump(struct atm_dev *dev)
  127. {
  128. struct eni_dev *eni_dev;
  129. int i;
  130. eni_dev = ENI_DEV(dev);
  131. printk(KERN_NOTICE "Free memory\n");
  132. dump_mem(eni_dev);
  133. printk(KERN_NOTICE "TX buffers\n");
  134. for (i = 0; i < NR_CHAN; i++)
  135. if (eni_dev->tx[i].send)
  136. printk(KERN_NOTICE " TX %d @ %p: %ld\n",i,
  137. eni_dev->tx[i].send,eni_dev->tx[i].words*4);
  138. printk(KERN_NOTICE "RX buffers\n");
  139. for (i = 0; i < 1024; i++)
  140. if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
  141. printk(KERN_NOTICE " RX %d @ %p: %ld\n",i,
  142. ENI_VCC(eni_dev->rx_map[i])->recv,
  143. ENI_VCC(eni_dev->rx_map[i])->words*4);
  144. printk(KERN_NOTICE "----\n");
  145. }
  146. static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
  147. unsigned long size)
  148. {
  149. struct eni_free *list;
  150. int len,order;
  151. DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
  152. start += eni_dev->base_diff;
  153. list = eni_dev->free_list;
  154. len = eni_dev->free_len;
  155. while (size) {
  156. if (len >= eni_dev->free_list_size) {
  157. printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
  158. start,size);
  159. break;
  160. }
  161. for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
  162. if (MID_MIN_BUF_SIZE > (1 << order)) {
  163. printk(KERN_CRIT "eni_put_free: order %d too small\n",
  164. order);
  165. break;
  166. }
  167. list[len].start = (void __iomem *) start;
  168. list[len].order = order;
  169. len++;
  170. start += 1 << order;
  171. size -= 1 << order;
  172. }
  173. eni_dev->free_len = len;
  174. /*dump_mem(eni_dev);*/
  175. }
  176. static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
  177. {
  178. struct eni_free *list;
  179. void __iomem *start;
  180. int len,i,order,best_order,index;
  181. list = eni_dev->free_list;
  182. len = eni_dev->free_len;
  183. if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
  184. if (*size > MID_MAX_BUF_SIZE) return NULL;
  185. for (order = 0; (1 << order) < *size; order++)
  186. ;
  187. DPRINTK("trying: %ld->%d\n",*size,order);
  188. best_order = 65; /* we don't have more than 2^64 of anything ... */
  189. index = 0; /* silence GCC */
  190. for (i = 0; i < len; i++)
  191. if (list[i].order == order) {
  192. best_order = order;
  193. index = i;
  194. break;
  195. }
  196. else if (best_order > list[i].order && list[i].order > order) {
  197. best_order = list[i].order;
  198. index = i;
  199. }
  200. if (best_order == 65) return NULL;
  201. start = list[index].start-eni_dev->base_diff;
  202. list[index] = list[--len];
  203. eni_dev->free_len = len;
  204. *size = 1 << order;
  205. eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
  206. DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
  207. memset_io(start,0,*size); /* never leak data */
  208. /*dump_mem(eni_dev);*/
  209. return start;
  210. }
  211. static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
  212. unsigned long size)
  213. {
  214. struct eni_free *list;
  215. int len,i,order;
  216. start += eni_dev->base_diff;
  217. list = eni_dev->free_list;
  218. len = eni_dev->free_len;
  219. for (order = -1; size; order++) size >>= 1;
  220. DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
  221. for (i = 0; i < len; i++)
  222. if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
  223. list[i].order == order) {
  224. DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
  225. list[i].start,start,1 << order,list[i].order,order);
  226. list[i] = list[--len];
  227. start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
  228. order++;
  229. i = -1;
  230. continue;
  231. }
  232. if (len >= eni_dev->free_list_size) {
  233. printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
  234. order);
  235. return;
  236. }
  237. list[len].start = start;
  238. list[len].order = order;
  239. eni_dev->free_len = len+1;
  240. /*dump_mem(eni_dev);*/
  241. }
  242. /*----------------------------------- RX ------------------------------------*/
  243. #define ENI_VCC_NOS ((struct atm_vcc *) 1)
  244. static void rx_ident_err(struct atm_vcc *vcc)
  245. {
  246. struct atm_dev *dev;
  247. struct eni_dev *eni_dev;
  248. struct eni_vcc *eni_vcc;
  249. dev = vcc->dev;
  250. eni_dev = ENI_DEV(dev);
  251. /* immediately halt adapter */
  252. eni_out(eni_in(MID_MC_S) &
  253. ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
  254. /* dump useful information */
  255. eni_vcc = ENI_VCC(vcc);
  256. printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
  257. "mismatch\n",dev->number);
  258. printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci,
  259. eni_vcc->rxing,eni_vcc->words);
  260. printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value "
  261. "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
  262. (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
  263. printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last,
  264. eni_vcc->servicing);
  265. EVENT("---dump ends here---\n",0,0);
  266. printk(KERN_NOTICE "---recent events---\n");
  267. event_dump();
  268. ENI_DEV(dev)->fast = NULL; /* really stop it */
  269. ENI_DEV(dev)->slow = NULL;
  270. skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
  271. }
  272. static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
  273. unsigned long skip,unsigned long size,unsigned long eff)
  274. {
  275. struct eni_dev *eni_dev;
  276. struct eni_vcc *eni_vcc;
  277. u32 dma_rd,dma_wr;
  278. u32 dma[RX_DMA_BUF*2];
  279. dma_addr_t paddr;
  280. unsigned long here;
  281. int i,j;
  282. eni_dev = ENI_DEV(vcc->dev);
  283. eni_vcc = ENI_VCC(vcc);
  284. paddr = 0; /* GCC, shut up */
  285. if (skb) {
  286. paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
  287. DMA_FROM_DEVICE);
  288. if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
  289. goto dma_map_error;
  290. ENI_PRV_PADDR(skb) = paddr;
  291. if (paddr & 3)
  292. printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
  293. "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
  294. vcc->vci,(unsigned long) paddr);
  295. ENI_PRV_SIZE(skb) = size+skip;
  296. /* PDU plus descriptor */
  297. ATM_SKB(skb)->vcc = vcc;
  298. }
  299. j = 0;
  300. if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
  301. here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
  302. dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
  303. << MID_DMA_VCI_SHIFT) | MID_DT_JK;
  304. dma[j++] = 0;
  305. }
  306. here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
  307. if (!eff) size += skip;
  308. else {
  309. unsigned long words;
  310. if (!size) {
  311. DPRINTK("strange things happen ...\n");
  312. EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
  313. size,eff);
  314. }
  315. words = eff;
  316. if (paddr & 15) {
  317. unsigned long init;
  318. init = 4-((paddr & 15) >> 2);
  319. if (init > words) init = words;
  320. dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
  321. (vcc->vci << MID_DMA_VCI_SHIFT);
  322. dma[j++] = paddr;
  323. paddr += init << 2;
  324. words -= init;
  325. }
  326. #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
  327. if (words & ~15) {
  328. dma[j++] = MID_DT_16W | ((words >> 4) <<
  329. MID_DMA_COUNT_SHIFT) | (vcc->vci <<
  330. MID_DMA_VCI_SHIFT);
  331. dma[j++] = paddr;
  332. paddr += (words & ~15) << 2;
  333. words &= 15;
  334. }
  335. #endif
  336. #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */
  337. if (words & ~7) {
  338. dma[j++] = MID_DT_8W | ((words >> 3) <<
  339. MID_DMA_COUNT_SHIFT) | (vcc->vci <<
  340. MID_DMA_VCI_SHIFT);
  341. dma[j++] = paddr;
  342. paddr += (words & ~7) << 2;
  343. words &= 7;
  344. }
  345. #endif
  346. #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
  347. if (words & ~3) {
  348. dma[j++] = MID_DT_4W | ((words >> 2) <<
  349. MID_DMA_COUNT_SHIFT) | (vcc->vci <<
  350. MID_DMA_VCI_SHIFT);
  351. dma[j++] = paddr;
  352. paddr += (words & ~3) << 2;
  353. words &= 3;
  354. }
  355. #endif
  356. #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
  357. if (words & ~1) {
  358. dma[j++] = MID_DT_2W | ((words >> 1) <<
  359. MID_DMA_COUNT_SHIFT) | (vcc->vci <<
  360. MID_DMA_VCI_SHIFT);
  361. dma[j++] = paddr;
  362. paddr += (words & ~1) << 2;
  363. words &= 1;
  364. }
  365. #endif
  366. if (words) {
  367. dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
  368. | (vcc->vci << MID_DMA_VCI_SHIFT);
  369. dma[j++] = paddr;
  370. }
  371. }
  372. if (size != eff) {
  373. dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
  374. (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
  375. dma[j++] = 0;
  376. }
  377. if (!j || j > 2*RX_DMA_BUF) {
  378. printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
  379. goto trouble;
  380. }
  381. dma[j-2] |= MID_DMA_END;
  382. j = j >> 1;
  383. dma_wr = eni_in(MID_DMA_WR_RX);
  384. dma_rd = eni_in(MID_DMA_RD_RX);
  385. /*
  386. * Can I move the dma_wr pointer by 2j+1 positions without overwriting
  387. * data that hasn't been read (position of dma_rd) yet ?
  388. */
  389. if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
  390. printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
  391. vcc->dev->number);
  392. goto trouble;
  393. }
  394. for (i = 0; i < j; i++) {
  395. writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
  396. writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
  397. dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
  398. }
  399. if (skb) {
  400. ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
  401. skb_queue_tail(&eni_dev->rx_queue,skb);
  402. eni_vcc->last = skb;
  403. rx_enqueued++;
  404. }
  405. eni_vcc->descr = here;
  406. eni_out(dma_wr,MID_DMA_WR_RX);
  407. return 0;
  408. trouble:
  409. if (paddr)
  410. dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
  411. DMA_FROM_DEVICE);
  412. dma_map_error:
  413. if (skb) dev_kfree_skb_irq(skb);
  414. return -1;
  415. }
  416. static void discard(struct atm_vcc *vcc,unsigned long size)
  417. {
  418. struct eni_vcc *eni_vcc;
  419. eni_vcc = ENI_VCC(vcc);
  420. EVENT("discard (size=%ld)\n",size,0);
  421. while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
  422. /* could do a full fallback, but that might be more expensive */
  423. if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
  424. else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
  425. }
  426. /*
  427. * TODO: should check whether direct copies (without DMA setup, dequeuing on
  428. * interrupt, etc.) aren't much faster for AAL0
  429. */
  430. static int rx_aal0(struct atm_vcc *vcc)
  431. {
  432. struct eni_vcc *eni_vcc;
  433. unsigned long descr;
  434. unsigned long length;
  435. struct sk_buff *skb;
  436. DPRINTK(">rx_aal0\n");
  437. eni_vcc = ENI_VCC(vcc);
  438. descr = readl(eni_vcc->recv+eni_vcc->descr*4);
  439. if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
  440. rx_ident_err(vcc);
  441. return 1;
  442. }
  443. if (descr & MID_RED_T) {
  444. DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
  445. vcc->dev->number);
  446. length = 0;
  447. atomic_inc(&vcc->stats->rx_err);
  448. }
  449. else {
  450. length = ATM_CELL_SIZE-1; /* no HEC */
  451. }
  452. skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
  453. if (!skb) {
  454. discard(vcc,length >> 2);
  455. return 0;
  456. }
  457. skb_put(skb,length);
  458. skb->tstamp = eni_vcc->timestamp;
  459. DPRINTK("got len %ld\n",length);
  460. if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
  461. eni_vcc->rxing++;
  462. return 0;
  463. }
  464. static int rx_aal5(struct atm_vcc *vcc)
  465. {
  466. struct eni_vcc *eni_vcc;
  467. unsigned long descr;
  468. unsigned long size,eff,length;
  469. struct sk_buff *skb;
  470. EVENT("rx_aal5\n",0,0);
  471. DPRINTK(">rx_aal5\n");
  472. eni_vcc = ENI_VCC(vcc);
  473. descr = readl(eni_vcc->recv+eni_vcc->descr*4);
  474. if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
  475. rx_ident_err(vcc);
  476. return 1;
  477. }
  478. if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
  479. if (descr & MID_RED_T) {
  480. EVENT("empty cell (descr=0x%lx)\n",descr,0);
  481. DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
  482. vcc->dev->number);
  483. size = 0;
  484. }
  485. else {
  486. static unsigned long silence = 0;
  487. if (time_after(jiffies, silence) || silence == 0) {
  488. printk(KERN_WARNING DEV_LABEL "(itf %d): "
  489. "discarding PDU(s) with CRC error\n",
  490. vcc->dev->number);
  491. silence = (jiffies+2*HZ)|1;
  492. }
  493. size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
  494. EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
  495. size);
  496. }
  497. eff = length = 0;
  498. atomic_inc(&vcc->stats->rx_err);
  499. }
  500. else {
  501. size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
  502. DPRINTK("size=%ld\n",size);
  503. length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
  504. (eni_vcc->words-1)))*4) & 0xffff;
  505. /* -trailer(2)+header(1) */
  506. if (length && length <= (size << 2)-8 && length <=
  507. ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
  508. else { /* ^ trailer length (8) */
  509. EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
  510. length);
  511. printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
  512. "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
  513. vcc->dev->number,vcc->vci,length,size << 2,descr);
  514. length = eff = 0;
  515. atomic_inc(&vcc->stats->rx_err);
  516. }
  517. }
  518. skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
  519. if (!skb) {
  520. discard(vcc,size);
  521. return 0;
  522. }
  523. skb_put(skb,length);
  524. DPRINTK("got len %ld\n",length);
  525. if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
  526. eni_vcc->rxing++;
  527. return 0;
  528. }
  529. static inline int rx_vcc(struct atm_vcc *vcc)
  530. {
  531. void __iomem *vci_dsc;
  532. unsigned long tmp;
  533. struct eni_vcc *eni_vcc;
  534. eni_vcc = ENI_VCC(vcc);
  535. vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
  536. EVENT("rx_vcc(1)\n",0,0);
  537. while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
  538. MID_VCI_DESCR_SHIFT)) {
  539. EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
  540. eni_vcc->descr,tmp);
  541. DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
  542. (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
  543. MID_VCI_DESCR_SHIFT));
  544. if (ENI_VCC(vcc)->rx(vcc)) return 1;
  545. }
  546. /* clear IN_SERVICE flag */
  547. writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
  548. /*
  549. * If new data has arrived between evaluating the while condition and
  550. * clearing IN_SERVICE, we wouldn't be notified until additional data
  551. * follows. So we have to loop again to be sure.
  552. */
  553. EVENT("rx_vcc(3)\n",0,0);
  554. while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
  555. >> MID_VCI_DESCR_SHIFT)) {
  556. EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
  557. eni_vcc->descr,tmp);
  558. DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
  559. (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
  560. MID_VCI_DESCR_SHIFT));
  561. if (ENI_VCC(vcc)->rx(vcc)) return 1;
  562. }
  563. return 0;
  564. }
  565. static void poll_rx(struct atm_dev *dev)
  566. {
  567. struct eni_dev *eni_dev;
  568. struct atm_vcc *curr;
  569. eni_dev = ENI_DEV(dev);
  570. while ((curr = eni_dev->fast)) {
  571. EVENT("poll_rx.fast\n",0,0);
  572. if (rx_vcc(curr)) return;
  573. eni_dev->fast = ENI_VCC(curr)->next;
  574. ENI_VCC(curr)->next = ENI_VCC_NOS;
  575. barrier();
  576. ENI_VCC(curr)->servicing--;
  577. }
  578. while ((curr = eni_dev->slow)) {
  579. EVENT("poll_rx.slow\n",0,0);
  580. if (rx_vcc(curr)) return;
  581. eni_dev->slow = ENI_VCC(curr)->next;
  582. ENI_VCC(curr)->next = ENI_VCC_NOS;
  583. barrier();
  584. ENI_VCC(curr)->servicing--;
  585. }
  586. }
  587. static void get_service(struct atm_dev *dev)
  588. {
  589. struct eni_dev *eni_dev;
  590. struct atm_vcc *vcc;
  591. unsigned long vci;
  592. DPRINTK(">get_service\n");
  593. eni_dev = ENI_DEV(dev);
  594. while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
  595. vci = readl(eni_dev->service+eni_dev->serv_read*4);
  596. eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
  597. vcc = eni_dev->rx_map[vci & 1023];
  598. if (!vcc) {
  599. printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
  600. "found\n",dev->number,vci);
  601. continue; /* nasty but we try to go on anyway */
  602. /* @@@ nope, doesn't work */
  603. }
  604. EVENT("getting from service\n",0,0);
  605. if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
  606. EVENT("double service\n",0,0);
  607. DPRINTK("Grr, servicing VCC %ld twice\n",vci);
  608. continue;
  609. }
  610. ENI_VCC(vcc)->timestamp = ktime_get_real();
  611. ENI_VCC(vcc)->next = NULL;
  612. if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
  613. if (eni_dev->fast)
  614. ENI_VCC(eni_dev->last_fast)->next = vcc;
  615. else eni_dev->fast = vcc;
  616. eni_dev->last_fast = vcc;
  617. }
  618. else {
  619. if (eni_dev->slow)
  620. ENI_VCC(eni_dev->last_slow)->next = vcc;
  621. else eni_dev->slow = vcc;
  622. eni_dev->last_slow = vcc;
  623. }
  624. putting++;
  625. ENI_VCC(vcc)->servicing++;
  626. }
  627. }
  628. static void dequeue_rx(struct atm_dev *dev)
  629. {
  630. struct eni_dev *eni_dev;
  631. struct eni_vcc *eni_vcc;
  632. struct atm_vcc *vcc;
  633. struct sk_buff *skb;
  634. void __iomem *vci_dsc;
  635. int first;
  636. eni_dev = ENI_DEV(dev);
  637. first = 1;
  638. while (1) {
  639. skb = skb_dequeue(&eni_dev->rx_queue);
  640. if (!skb) {
  641. if (first) {
  642. DPRINTK(DEV_LABEL "(itf %d): RX but not "
  643. "rxing\n",dev->number);
  644. EVENT("nothing to dequeue\n",0,0);
  645. }
  646. break;
  647. }
  648. EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
  649. ENI_PRV_POS(skb));
  650. rx_dequeued++;
  651. vcc = ATM_SKB(skb)->vcc;
  652. eni_vcc = ENI_VCC(vcc);
  653. first = 0;
  654. vci_dsc = eni_dev->vci+vcc->vci*16;
  655. if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
  656. (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
  657. eni_vcc->words)) {
  658. EVENT("requeuing\n",0,0);
  659. skb_queue_head(&eni_dev->rx_queue,skb);
  660. break;
  661. }
  662. eni_vcc->rxing--;
  663. eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
  664. dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
  665. DMA_TO_DEVICE);
  666. if (!skb->len) dev_kfree_skb_irq(skb);
  667. else {
  668. EVENT("pushing (len=%ld)\n",skb->len,0);
  669. if (vcc->qos.aal == ATM_AAL0)
  670. *(unsigned long *) skb->data =
  671. ntohl(*(unsigned long *) skb->data);
  672. memset(skb->cb,0,sizeof(struct eni_skb_prv));
  673. vcc->push(vcc,skb);
  674. pushed++;
  675. }
  676. atomic_inc(&vcc->stats->rx);
  677. }
  678. wake_up(&eni_dev->rx_wait);
  679. }
  680. static int open_rx_first(struct atm_vcc *vcc)
  681. {
  682. struct eni_dev *eni_dev;
  683. struct eni_vcc *eni_vcc;
  684. unsigned long size;
  685. DPRINTK("open_rx_first\n");
  686. eni_dev = ENI_DEV(vcc->dev);
  687. eni_vcc = ENI_VCC(vcc);
  688. eni_vcc->rx = NULL;
  689. if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
  690. size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
  691. if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
  692. MID_MAX_BUF_SIZE)
  693. size = MID_MAX_BUF_SIZE;
  694. eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
  695. DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
  696. eni_vcc->words = size >> 2;
  697. if (!eni_vcc->recv) return -ENOBUFS;
  698. eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
  699. eni_vcc->descr = 0;
  700. eni_vcc->rx_pos = 0;
  701. eni_vcc->rxing = 0;
  702. eni_vcc->servicing = 0;
  703. eni_vcc->next = ENI_VCC_NOS;
  704. return 0;
  705. }
  706. static int open_rx_second(struct atm_vcc *vcc)
  707. {
  708. void __iomem *here;
  709. struct eni_dev *eni_dev;
  710. struct eni_vcc *eni_vcc;
  711. unsigned long size;
  712. int order;
  713. DPRINTK("open_rx_second\n");
  714. eni_dev = ENI_DEV(vcc->dev);
  715. eni_vcc = ENI_VCC(vcc);
  716. if (!eni_vcc->rx) return 0;
  717. /* set up VCI descriptor */
  718. here = eni_dev->vci+vcc->vci*16;
  719. DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
  720. size = eni_vcc->words >> 8;
  721. for (order = -1; size; order++) size >>= 1;
  722. writel(0,here+4); /* descr, read = 0 */
  723. writel(0,here+8); /* write, state, count = 0 */
  724. if (eni_dev->rx_map[vcc->vci])
  725. printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
  726. "in use\n",vcc->dev->number,vcc->vci);
  727. eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
  728. writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
  729. MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
  730. (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
  731. MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
  732. return 0;
  733. }
  734. static void close_rx(struct atm_vcc *vcc)
  735. {
  736. DECLARE_WAITQUEUE(wait,current);
  737. void __iomem *here;
  738. struct eni_dev *eni_dev;
  739. struct eni_vcc *eni_vcc;
  740. eni_vcc = ENI_VCC(vcc);
  741. if (!eni_vcc->rx) return;
  742. eni_dev = ENI_DEV(vcc->dev);
  743. if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
  744. here = eni_dev->vci+vcc->vci*16;
  745. /* block receiver */
  746. writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
  747. MID_VCI_MODE_SHIFT),here);
  748. /* wait for receiver to become idle */
  749. udelay(27);
  750. /* discard pending cell */
  751. writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
  752. /* don't accept any new ones */
  753. eni_dev->rx_map[vcc->vci] = NULL;
  754. /* wait for RX queue to drain */
  755. DPRINTK("eni_close: waiting for RX ...\n");
  756. EVENT("RX closing\n",0,0);
  757. add_wait_queue(&eni_dev->rx_wait,&wait);
  758. set_current_state(TASK_UNINTERRUPTIBLE);
  759. barrier();
  760. for (;;) {
  761. /* transition service->rx: rxing++, servicing-- */
  762. if (!eni_vcc->servicing) {
  763. barrier();
  764. if (!eni_vcc->rxing) break;
  765. }
  766. EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
  767. eni_vcc->servicing);
  768. printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
  769. eni_vcc->rxing);
  770. schedule();
  771. set_current_state(TASK_UNINTERRUPTIBLE);
  772. }
  773. for (;;) {
  774. int at_end;
  775. u32 tmp;
  776. tasklet_disable(&eni_dev->task);
  777. tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
  778. at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
  779. tasklet_enable(&eni_dev->task);
  780. if (at_end) break;
  781. EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
  782. eni_vcc->rx_pos,tmp);
  783. printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
  784. eni_vcc->rx_pos,tmp);
  785. schedule();
  786. set_current_state(TASK_UNINTERRUPTIBLE);
  787. }
  788. set_current_state(TASK_RUNNING);
  789. remove_wait_queue(&eni_dev->rx_wait,&wait);
  790. }
  791. eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
  792. eni_vcc->rx = NULL;
  793. }
  794. static int start_rx(struct atm_dev *dev)
  795. {
  796. struct eni_dev *eni_dev;
  797. eni_dev = ENI_DEV(dev);
  798. eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
  799. if (!eni_dev->rx_map) {
  800. printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
  801. dev->number);
  802. free_page((unsigned long) eni_dev->free_list);
  803. return -ENOMEM;
  804. }
  805. eni_dev->rx_mult = DEFAULT_RX_MULT;
  806. eni_dev->fast = eni_dev->last_fast = NULL;
  807. eni_dev->slow = eni_dev->last_slow = NULL;
  808. init_waitqueue_head(&eni_dev->rx_wait);
  809. skb_queue_head_init(&eni_dev->rx_queue);
  810. eni_dev->serv_read = eni_in(MID_SERV_WRITE);
  811. eni_out(0,MID_DMA_WR_RX);
  812. return 0;
  813. }
  814. /*----------------------------------- TX ------------------------------------*/
  815. enum enq_res { enq_ok,enq_next,enq_jam };
  816. static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
  817. u32 size)
  818. {
  819. u32 init,words;
  820. DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
  821. EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
  822. #if 0 /* don't complain anymore */
  823. if (paddr & 3)
  824. printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
  825. if (size & 3)
  826. printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
  827. #endif
  828. if (paddr & 3) {
  829. init = 4-(paddr & 3);
  830. if (init > size || size < 7) init = size;
  831. DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
  832. (unsigned long) paddr,init,size);
  833. dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
  834. (chan << MID_DMA_CHAN_SHIFT);
  835. dma[(*j)++] = paddr;
  836. paddr += init;
  837. size -= init;
  838. }
  839. words = size >> 2;
  840. size &= 3;
  841. if (words && (paddr & 31)) {
  842. init = 8-((paddr & 31) >> 2);
  843. if (init > words) init = words;
  844. DPRINTK("put_dma: %lx DMA: %d/%d words\n",
  845. (unsigned long) paddr,init,words);
  846. dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
  847. (chan << MID_DMA_CHAN_SHIFT);
  848. dma[(*j)++] = paddr;
  849. paddr += init << 2;
  850. words -= init;
  851. }
  852. #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
  853. if (words & ~15) {
  854. DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
  855. (unsigned long) paddr,words >> 4,words);
  856. dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
  857. | (chan << MID_DMA_CHAN_SHIFT);
  858. dma[(*j)++] = paddr;
  859. paddr += (words & ~15) << 2;
  860. words &= 15;
  861. }
  862. #endif
  863. #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
  864. if (words & ~7) {
  865. DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
  866. (unsigned long) paddr,words >> 3,words);
  867. dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
  868. | (chan << MID_DMA_CHAN_SHIFT);
  869. dma[(*j)++] = paddr;
  870. paddr += (words & ~7) << 2;
  871. words &= 7;
  872. }
  873. #endif
  874. #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
  875. if (words & ~3) {
  876. DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
  877. (unsigned long) paddr,words >> 2,words);
  878. dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
  879. | (chan << MID_DMA_CHAN_SHIFT);
  880. dma[(*j)++] = paddr;
  881. paddr += (words & ~3) << 2;
  882. words &= 3;
  883. }
  884. #endif
  885. #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
  886. if (words & ~1) {
  887. DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
  888. (unsigned long) paddr,words >> 1,words);
  889. dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
  890. | (chan << MID_DMA_CHAN_SHIFT);
  891. dma[(*j)++] = paddr;
  892. paddr += (words & ~1) << 2;
  893. words &= 1;
  894. }
  895. #endif
  896. if (words) {
  897. DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
  898. words);
  899. dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
  900. (chan << MID_DMA_CHAN_SHIFT);
  901. dma[(*j)++] = paddr;
  902. paddr += words << 2;
  903. }
  904. if (size) {
  905. DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
  906. size);
  907. dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
  908. (chan << MID_DMA_CHAN_SHIFT);
  909. dma[(*j)++] = paddr;
  910. }
  911. }
  912. static enum enq_res do_tx(struct sk_buff *skb)
  913. {
  914. struct atm_vcc *vcc;
  915. struct eni_dev *eni_dev;
  916. struct eni_vcc *eni_vcc;
  917. struct eni_tx *tx;
  918. dma_addr_t paddr;
  919. u32 dma_rd,dma_wr;
  920. u32 size; /* in words */
  921. int aal5,dma_size,i,j;
  922. unsigned char skb_data3;
  923. DPRINTK(">do_tx\n");
  924. NULLCHECK(skb);
  925. EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
  926. vcc = ATM_SKB(skb)->vcc;
  927. NULLCHECK(vcc);
  928. eni_dev = ENI_DEV(vcc->dev);
  929. NULLCHECK(eni_dev);
  930. eni_vcc = ENI_VCC(vcc);
  931. tx = eni_vcc->tx;
  932. NULLCHECK(tx);
  933. #if 0 /* Enable this for testing with the "align" program */
  934. {
  935. unsigned int hack = *((char *) skb->data)-'0';
  936. if (hack < 8) {
  937. skb->data += hack;
  938. skb->len -= hack;
  939. }
  940. }
  941. #endif
  942. #if 0 /* should work now */
  943. if ((unsigned long) skb->data & 3)
  944. printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
  945. "TX data\n",vcc->dev->number,vcc->vci);
  946. #endif
  947. /*
  948. * Potential future IP speedup: make hard_header big enough to put
  949. * segmentation descriptor directly into PDU. Saves: 4 slave writes,
  950. * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
  951. */
  952. aal5 = vcc->qos.aal == ATM_AAL5;
  953. /* check space in buffer */
  954. if (!aal5)
  955. size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
  956. /* cell without HEC plus segmentation header (includes
  957. four-byte cell header) */
  958. else {
  959. size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
  960. /* add AAL5 trailer */
  961. size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
  962. /* add segmentation header */
  963. }
  964. /*
  965. * Can I move tx_pos by size bytes without getting closer than TX_GAP
  966. * to the read pointer ? TX_GAP means to leave some space for what
  967. * the manual calls "too close".
  968. */
  969. if (!NEPMOK(tx->tx_pos,size+TX_GAP,
  970. eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
  971. DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
  972. vcc->dev->number,size);
  973. return enq_next;
  974. }
  975. /* check DMA */
  976. dma_wr = eni_in(MID_DMA_WR_TX);
  977. dma_rd = eni_in(MID_DMA_RD_TX);
  978. dma_size = 3; /* JK for descriptor and final fill, plus final size
  979. mis-alignment fix */
  980. DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
  981. if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
  982. else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
  983. if (dma_size > TX_DMA_BUF) {
  984. printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
  985. "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
  986. }
  987. DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
  988. if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
  989. dma_size) {
  990. printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
  991. vcc->dev->number);
  992. return enq_jam;
  993. }
  994. skb_data3 = skb->data[3];
  995. paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
  996. DMA_TO_DEVICE);
  997. if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
  998. return enq_next;
  999. ENI_PRV_PADDR(skb) = paddr;
  1000. /* prepare DMA queue entries */
  1001. j = 0;
  1002. eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
  1003. MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
  1004. MID_DT_JK;
  1005. j++;
  1006. if (!skb_shinfo(skb)->nr_frags)
  1007. if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
  1008. else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
  1009. else {
  1010. DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
  1011. for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
  1012. if (i == -1)
  1013. put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
  1014. skb->data,
  1015. skb_headlen(skb));
  1016. else
  1017. put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
  1018. skb_frag_page(&skb_shinfo(skb)->frags[i]) +
  1019. skb_frag_off(&skb_shinfo(skb)->frags[i]),
  1020. skb_frag_size(&skb_shinfo(skb)->frags[i]));
  1021. }
  1022. if (skb->len & 3) {
  1023. put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
  1024. 4 - (skb->len & 3));
  1025. }
  1026. /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
  1027. eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
  1028. MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
  1029. MID_DMA_END | MID_DT_JK;
  1030. j++;
  1031. DPRINTK("DMA at end: %d\n",j);
  1032. /* store frame */
  1033. writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
  1034. (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
  1035. (tx->resolution << MID_SEG_RATE_SHIFT) |
  1036. (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
  1037. /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
  1038. writel((vcc->vci << MID_SEG_VCI_SHIFT) |
  1039. (aal5 ? 0 : (skb_data3 & 0xf)) |
  1040. (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
  1041. tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
  1042. DPRINTK("size: %d, len:%d\n",size,skb->len);
  1043. if (aal5)
  1044. writel(skb->len,tx->send+
  1045. ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
  1046. j = j >> 1;
  1047. for (i = 0; i < j; i++) {
  1048. writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
  1049. writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
  1050. dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
  1051. }
  1052. ENI_PRV_POS(skb) = tx->tx_pos;
  1053. ENI_PRV_SIZE(skb) = size;
  1054. ENI_VCC(vcc)->txing += size;
  1055. tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
  1056. DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
  1057. eni_out(dma_wr,MID_DMA_WR_TX);
  1058. skb_queue_tail(&eni_dev->tx_queue,skb);
  1059. queued++;
  1060. return enq_ok;
  1061. }
  1062. static void poll_tx(struct atm_dev *dev)
  1063. {
  1064. struct eni_tx *tx;
  1065. struct sk_buff *skb;
  1066. enum enq_res res;
  1067. int i;
  1068. DPRINTK(">poll_tx\n");
  1069. for (i = NR_CHAN-1; i >= 0; i--) {
  1070. tx = &ENI_DEV(dev)->tx[i];
  1071. if (tx->send)
  1072. while ((skb = skb_dequeue(&tx->backlog))) {
  1073. res = do_tx(skb);
  1074. if (res == enq_ok) continue;
  1075. DPRINTK("re-queuing TX PDU\n");
  1076. skb_queue_head(&tx->backlog,skb);
  1077. requeued++;
  1078. if (res == enq_jam) return;
  1079. break;
  1080. }
  1081. }
  1082. }
  1083. static void dequeue_tx(struct atm_dev *dev)
  1084. {
  1085. struct eni_dev *eni_dev;
  1086. struct atm_vcc *vcc;
  1087. struct sk_buff *skb;
  1088. struct eni_tx *tx;
  1089. NULLCHECK(dev);
  1090. eni_dev = ENI_DEV(dev);
  1091. NULLCHECK(eni_dev);
  1092. while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
  1093. vcc = ATM_SKB(skb)->vcc;
  1094. NULLCHECK(vcc);
  1095. tx = ENI_VCC(vcc)->tx;
  1096. NULLCHECK(ENI_VCC(vcc)->tx);
  1097. DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
  1098. (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
  1099. if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
  1100. eni_in(MID_TX_DESCRSTART(tx->index))) {
  1101. skb_queue_head(&eni_dev->tx_queue,skb);
  1102. break;
  1103. }
  1104. ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
  1105. dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
  1106. DMA_TO_DEVICE);
  1107. if (vcc->pop) vcc->pop(vcc,skb);
  1108. else dev_kfree_skb_irq(skb);
  1109. atomic_inc(&vcc->stats->tx);
  1110. wake_up(&eni_dev->tx_wait);
  1111. dma_complete++;
  1112. }
  1113. }
  1114. static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
  1115. {
  1116. int i;
  1117. for (i = !ubr; i < NR_CHAN; i++)
  1118. if (!eni_dev->tx[i].send) return eni_dev->tx+i;
  1119. return NULL;
  1120. }
  1121. static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
  1122. int *res,int unlimited)
  1123. {
  1124. static const int pre_div[] = { 4,16,128,2048 };
  1125. /* 2^(((x+2)^2-(x+2))/2+1) */
  1126. if (unlimited) *pre = *res = 0;
  1127. else {
  1128. if (*pcr > 0) {
  1129. int div;
  1130. for (*pre = 0; *pre < 3; (*pre)++)
  1131. if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
  1132. div = pre_div[*pre]**pcr;
  1133. DPRINTK("min div %d\n",div);
  1134. *res = TS_CLOCK/div-1;
  1135. }
  1136. else {
  1137. int div;
  1138. if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
  1139. for (*pre = 3; *pre >= 0; (*pre)--)
  1140. if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
  1141. if (*pre < 3) (*pre)++; /* else fail later */
  1142. div = pre_div[*pre]*-*pcr;
  1143. DPRINTK("max div %d\n",div);
  1144. *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
  1145. }
  1146. if (*res < 0) *res = 0;
  1147. if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
  1148. }
  1149. *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
  1150. DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
  1151. return 0;
  1152. }
  1153. static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
  1154. int set_rsv,int set_shp)
  1155. {
  1156. struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
  1157. struct eni_vcc *eni_vcc = ENI_VCC(vcc);
  1158. struct eni_tx *tx;
  1159. unsigned long size;
  1160. void __iomem *mem;
  1161. int rate,ubr,unlimited,new_tx;
  1162. int pre,res,order;
  1163. int error;
  1164. rate = atm_pcr_goal(txtp);
  1165. ubr = txtp->traffic_class == ATM_UBR;
  1166. unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
  1167. rate >= ATM_OC3_PCR);
  1168. if (!unlimited) {
  1169. size = txtp->max_sdu*eni_dev->tx_mult/100;
  1170. if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
  1171. MID_MAX_BUF_SIZE)
  1172. size = MID_MAX_BUF_SIZE;
  1173. }
  1174. else {
  1175. if (eni_dev->ubr) {
  1176. eni_vcc->tx = eni_dev->ubr;
  1177. txtp->pcr = ATM_OC3_PCR;
  1178. return 0;
  1179. }
  1180. size = UBR_BUFFER;
  1181. }
  1182. new_tx = !eni_vcc->tx;
  1183. mem = NULL; /* for gcc */
  1184. if (!new_tx) tx = eni_vcc->tx;
  1185. else {
  1186. mem = eni_alloc_mem(eni_dev,&size);
  1187. if (!mem) return -ENOBUFS;
  1188. tx = alloc_tx(eni_dev,unlimited);
  1189. if (!tx) {
  1190. eni_free_mem(eni_dev,mem,size);
  1191. return -EBUSY;
  1192. }
  1193. DPRINTK("got chan %d\n",tx->index);
  1194. tx->reserved = tx->shaping = 0;
  1195. tx->send = mem;
  1196. tx->words = size >> 2;
  1197. skb_queue_head_init(&tx->backlog);
  1198. for (order = 0; size > (1 << (order+10)); order++);
  1199. eni_out((order << MID_SIZE_SHIFT) |
  1200. ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
  1201. MID_TX_PLACE(tx->index));
  1202. tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
  1203. MID_DESCR_START;
  1204. }
  1205. error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
  1206. if (!error && txtp->min_pcr > rate) error = -EINVAL;
  1207. if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
  1208. txtp->max_pcr < rate) error = -EINVAL;
  1209. if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
  1210. error = -EINVAL;
  1211. if (!error && set_rsv && !set_shp && rate < tx->shaping)
  1212. error = -EINVAL;
  1213. if (!error && !set_rsv && rate > tx->reserved && !ubr)
  1214. error = -EINVAL;
  1215. if (error) {
  1216. if (new_tx) {
  1217. tx->send = NULL;
  1218. eni_free_mem(eni_dev,mem,size);
  1219. }
  1220. return error;
  1221. }
  1222. txtp->pcr = rate;
  1223. if (set_rsv && !ubr) {
  1224. eni_dev->tx_bw += tx->reserved;
  1225. tx->reserved = rate;
  1226. eni_dev->tx_bw -= rate;
  1227. }
  1228. if (set_shp || (unlimited && new_tx)) {
  1229. if (unlimited && new_tx) eni_dev->ubr = tx;
  1230. tx->prescaler = pre;
  1231. tx->resolution = res;
  1232. tx->shaping = rate;
  1233. }
  1234. if (set_shp) eni_vcc->tx = tx;
  1235. DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
  1236. return 0;
  1237. }
  1238. static int open_tx_first(struct atm_vcc *vcc)
  1239. {
  1240. ENI_VCC(vcc)->tx = NULL;
  1241. if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
  1242. ENI_VCC(vcc)->txing = 0;
  1243. return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
  1244. }
  1245. static int open_tx_second(struct atm_vcc *vcc)
  1246. {
  1247. return 0; /* nothing to do */
  1248. }
  1249. static void close_tx(struct atm_vcc *vcc)
  1250. {
  1251. DECLARE_WAITQUEUE(wait,current);
  1252. struct eni_dev *eni_dev;
  1253. struct eni_vcc *eni_vcc;
  1254. eni_vcc = ENI_VCC(vcc);
  1255. if (!eni_vcc->tx) return;
  1256. eni_dev = ENI_DEV(vcc->dev);
  1257. /* wait for TX queue to drain */
  1258. DPRINTK("eni_close: waiting for TX ...\n");
  1259. add_wait_queue(&eni_dev->tx_wait,&wait);
  1260. set_current_state(TASK_UNINTERRUPTIBLE);
  1261. for (;;) {
  1262. int txing;
  1263. tasklet_disable(&eni_dev->task);
  1264. txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
  1265. tasklet_enable(&eni_dev->task);
  1266. if (!txing) break;
  1267. DPRINTK("%d TX left\n",eni_vcc->txing);
  1268. schedule();
  1269. set_current_state(TASK_UNINTERRUPTIBLE);
  1270. }
  1271. set_current_state(TASK_RUNNING);
  1272. remove_wait_queue(&eni_dev->tx_wait,&wait);
  1273. if (eni_vcc->tx != eni_dev->ubr) {
  1274. /*
  1275. * Looping a few times in here is probably far cheaper than
  1276. * keeping track of TX completions all the time, so let's poll
  1277. * a bit ...
  1278. */
  1279. while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
  1280. eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
  1281. schedule();
  1282. eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
  1283. eni_vcc->tx->send = NULL;
  1284. eni_dev->tx_bw += eni_vcc->tx->reserved;
  1285. }
  1286. eni_vcc->tx = NULL;
  1287. }
  1288. static int start_tx(struct atm_dev *dev)
  1289. {
  1290. struct eni_dev *eni_dev;
  1291. int i;
  1292. eni_dev = ENI_DEV(dev);
  1293. eni_dev->lost = 0;
  1294. eni_dev->tx_bw = ATM_OC3_PCR;
  1295. eni_dev->tx_mult = DEFAULT_TX_MULT;
  1296. init_waitqueue_head(&eni_dev->tx_wait);
  1297. eni_dev->ubr = NULL;
  1298. skb_queue_head_init(&eni_dev->tx_queue);
  1299. eni_out(0,MID_DMA_WR_TX);
  1300. for (i = 0; i < NR_CHAN; i++) {
  1301. eni_dev->tx[i].send = NULL;
  1302. eni_dev->tx[i].index = i;
  1303. }
  1304. return 0;
  1305. }
  1306. /*--------------------------------- common ----------------------------------*/
  1307. #if 0 /* may become useful again when tuning things */
  1308. static void foo(void)
  1309. {
  1310. printk(KERN_INFO
  1311. "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
  1312. "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
  1313. tx_complete,dma_complete,queued,requeued,submitted,backlogged,
  1314. rx_enqueued,rx_dequeued,putting,pushed);
  1315. if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
  1316. }
  1317. #endif
  1318. static void bug_int(struct atm_dev *dev,unsigned long reason)
  1319. {
  1320. DPRINTK(">bug_int\n");
  1321. if (reason & MID_DMA_ERR_ACK)
  1322. printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
  1323. "error\n",dev->number);
  1324. if (reason & MID_TX_IDENT_MISM)
  1325. printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
  1326. "mismatch\n",dev->number);
  1327. if (reason & MID_TX_DMA_OVFL)
  1328. printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
  1329. "overflow\n",dev->number);
  1330. EVENT("---dump ends here---\n",0,0);
  1331. printk(KERN_NOTICE "---recent events---\n");
  1332. event_dump();
  1333. }
  1334. static irqreturn_t eni_int(int irq,void *dev_id)
  1335. {
  1336. struct atm_dev *dev;
  1337. struct eni_dev *eni_dev;
  1338. u32 reason;
  1339. DPRINTK(">eni_int\n");
  1340. dev = dev_id;
  1341. eni_dev = ENI_DEV(dev);
  1342. reason = eni_in(MID_ISA);
  1343. DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
  1344. /*
  1345. * Must handle these two right now, because reading ISA doesn't clear
  1346. * them, so they re-occur and we never make it to the tasklet. Since
  1347. * they're rare, we don't mind the occasional invocation of eni_tasklet
  1348. * with eni_dev->events == 0.
  1349. */
  1350. if (reason & MID_STAT_OVFL) {
  1351. EVENT("stat overflow\n",0,0);
  1352. eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
  1353. }
  1354. if (reason & MID_SUNI_INT) {
  1355. EVENT("SUNI int\n",0,0);
  1356. dev->phy->interrupt(dev);
  1357. #if 0
  1358. foo();
  1359. #endif
  1360. }
  1361. spin_lock(&eni_dev->lock);
  1362. eni_dev->events |= reason;
  1363. spin_unlock(&eni_dev->lock);
  1364. tasklet_schedule(&eni_dev->task);
  1365. return IRQ_HANDLED;
  1366. }
  1367. static void eni_tasklet(unsigned long data)
  1368. {
  1369. struct atm_dev *dev = (struct atm_dev *) data;
  1370. struct eni_dev *eni_dev = ENI_DEV(dev);
  1371. unsigned long flags;
  1372. u32 events;
  1373. DPRINTK("eni_tasklet (dev %p)\n",dev);
  1374. spin_lock_irqsave(&eni_dev->lock,flags);
  1375. events = xchg(&eni_dev->events,0);
  1376. spin_unlock_irqrestore(&eni_dev->lock,flags);
  1377. if (events & MID_RX_DMA_COMPLETE) {
  1378. EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
  1379. dequeue_rx(dev);
  1380. EVENT("dequeue_rx done, starting poll_rx\n",0,0);
  1381. poll_rx(dev);
  1382. EVENT("poll_rx done\n",0,0);
  1383. /* poll_tx ? */
  1384. }
  1385. if (events & MID_SERVICE) {
  1386. EVENT("INT: service, starting get_service\n",0,0);
  1387. get_service(dev);
  1388. EVENT("get_service done, starting poll_rx\n",0,0);
  1389. poll_rx(dev);
  1390. EVENT("poll_rx done\n",0,0);
  1391. }
  1392. if (events & MID_TX_DMA_COMPLETE) {
  1393. EVENT("INT: TX DMA COMPLETE\n",0,0);
  1394. dequeue_tx(dev);
  1395. }
  1396. if (events & MID_TX_COMPLETE) {
  1397. EVENT("INT: TX COMPLETE\n",0,0);
  1398. tx_complete++;
  1399. wake_up(&eni_dev->tx_wait);
  1400. /* poll_rx ? */
  1401. }
  1402. if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
  1403. EVENT("bug interrupt\n",0,0);
  1404. bug_int(dev,events);
  1405. }
  1406. poll_tx(dev);
  1407. }
  1408. /*--------------------------------- entries ---------------------------------*/
  1409. static char * const media_name[] = {
  1410. "MMF", "SMF", "MMF", "03?", /* 0- 3 */
  1411. "UTP", "05?", "06?", "07?", /* 4- 7 */
  1412. "TAXI","09?", "10?", "11?", /* 8-11 */
  1413. "12?", "13?", "14?", "15?", /* 12-15 */
  1414. "MMF", "SMF", "18?", "19?", /* 16-19 */
  1415. "UTP", "21?", "22?", "23?", /* 20-23 */
  1416. "24?", "25?", "26?", "27?", /* 24-27 */
  1417. "28?", "29?", "30?", "31?" /* 28-31 */
  1418. };
  1419. #define SET_SEPROM \
  1420. ({ if (!error && !pci_error) { \
  1421. pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
  1422. udelay(10); /* 10 usecs */ \
  1423. } })
  1424. #define GET_SEPROM \
  1425. ({ if (!error && !pci_error) { \
  1426. pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
  1427. udelay(10); /* 10 usecs */ \
  1428. } })
  1429. static int get_esi_asic(struct atm_dev *dev)
  1430. {
  1431. struct eni_dev *eni_dev;
  1432. unsigned char tonga;
  1433. int error,failed,pci_error;
  1434. int address,i,j;
  1435. eni_dev = ENI_DEV(dev);
  1436. error = pci_error = 0;
  1437. tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
  1438. SET_SEPROM;
  1439. for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
  1440. /* start operation */
  1441. tonga |= SEPROM_DATA;
  1442. SET_SEPROM;
  1443. tonga |= SEPROM_CLK;
  1444. SET_SEPROM;
  1445. tonga &= ~SEPROM_DATA;
  1446. SET_SEPROM;
  1447. tonga &= ~SEPROM_CLK;
  1448. SET_SEPROM;
  1449. /* send address */
  1450. address = ((i+SEPROM_ESI_BASE) << 1)+1;
  1451. for (j = 7; j >= 0; j--) {
  1452. tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
  1453. tonga & ~SEPROM_DATA;
  1454. SET_SEPROM;
  1455. tonga |= SEPROM_CLK;
  1456. SET_SEPROM;
  1457. tonga &= ~SEPROM_CLK;
  1458. SET_SEPROM;
  1459. }
  1460. /* get ack */
  1461. tonga |= SEPROM_DATA;
  1462. SET_SEPROM;
  1463. tonga |= SEPROM_CLK;
  1464. SET_SEPROM;
  1465. GET_SEPROM;
  1466. failed = tonga & SEPROM_DATA;
  1467. tonga &= ~SEPROM_CLK;
  1468. SET_SEPROM;
  1469. tonga |= SEPROM_DATA;
  1470. SET_SEPROM;
  1471. if (failed) error = -EIO;
  1472. else {
  1473. dev->esi[i] = 0;
  1474. for (j = 7; j >= 0; j--) {
  1475. dev->esi[i] <<= 1;
  1476. tonga |= SEPROM_DATA;
  1477. SET_SEPROM;
  1478. tonga |= SEPROM_CLK;
  1479. SET_SEPROM;
  1480. GET_SEPROM;
  1481. if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
  1482. tonga &= ~SEPROM_CLK;
  1483. SET_SEPROM;
  1484. tonga |= SEPROM_DATA;
  1485. SET_SEPROM;
  1486. }
  1487. /* get ack */
  1488. tonga |= SEPROM_DATA;
  1489. SET_SEPROM;
  1490. tonga |= SEPROM_CLK;
  1491. SET_SEPROM;
  1492. GET_SEPROM;
  1493. if (!(tonga & SEPROM_DATA)) error = -EIO;
  1494. tonga &= ~SEPROM_CLK;
  1495. SET_SEPROM;
  1496. tonga |= SEPROM_DATA;
  1497. SET_SEPROM;
  1498. }
  1499. /* stop operation */
  1500. tonga &= ~SEPROM_DATA;
  1501. SET_SEPROM;
  1502. tonga |= SEPROM_CLK;
  1503. SET_SEPROM;
  1504. tonga |= SEPROM_DATA;
  1505. SET_SEPROM;
  1506. }
  1507. if (pci_error) {
  1508. printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
  1509. "(0x%02x)\n",dev->number,pci_error);
  1510. error = -EIO;
  1511. }
  1512. return error;
  1513. }
  1514. #undef SET_SEPROM
  1515. #undef GET_SEPROM
  1516. static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
  1517. {
  1518. void __iomem *mac_base;
  1519. int i;
  1520. mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
  1521. for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
  1522. return 0;
  1523. }
  1524. static int eni_do_init(struct atm_dev *dev)
  1525. {
  1526. struct midway_eprom __iomem *eprom;
  1527. struct eni_dev *eni_dev;
  1528. struct pci_dev *pci_dev;
  1529. unsigned long real_base;
  1530. void __iomem *base;
  1531. int error,i,last;
  1532. DPRINTK(">eni_init\n");
  1533. dev->ci_range.vpi_bits = 0;
  1534. dev->ci_range.vci_bits = NR_VCI_LD;
  1535. dev->link_rate = ATM_OC3_PCR;
  1536. eni_dev = ENI_DEV(dev);
  1537. pci_dev = eni_dev->pci_dev;
  1538. real_base = pci_resource_start(pci_dev, 0);
  1539. eni_dev->irq = pci_dev->irq;
  1540. if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
  1541. PCI_COMMAND_MEMORY |
  1542. (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
  1543. printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
  1544. "(0x%02x)\n",dev->number,error);
  1545. return -EIO;
  1546. }
  1547. printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
  1548. dev->number,pci_dev->revision,real_base,eni_dev->irq);
  1549. if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
  1550. printk("\n");
  1551. printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
  1552. "mapping\n",dev->number);
  1553. return -ENOMEM;
  1554. }
  1555. eni_dev->ioaddr = base;
  1556. eni_dev->base_diff = real_base - (unsigned long) base;
  1557. /* id may not be present in ASIC Tonga boards - check this @@@ */
  1558. if (!eni_dev->asic) {
  1559. eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
  1560. if (readl(&eprom->magic) != ENI155_MAGIC) {
  1561. printk("\n");
  1562. printk(KERN_ERR DEV_LABEL
  1563. "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
  1564. dev->number, ENI155_MAGIC,
  1565. (unsigned)readl(&eprom->magic));
  1566. error = -EINVAL;
  1567. goto unmap;
  1568. }
  1569. }
  1570. eni_dev->phy = base+PHY_BASE;
  1571. eni_dev->reg = base+REG_BASE;
  1572. eni_dev->ram = base+RAM_BASE;
  1573. last = MAP_MAX_SIZE-RAM_BASE;
  1574. for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
  1575. writel(0x55555555,eni_dev->ram+i);
  1576. if (readl(eni_dev->ram+i) != 0x55555555) last = i;
  1577. else {
  1578. writel(0xAAAAAAAA,eni_dev->ram+i);
  1579. if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
  1580. else writel(i,eni_dev->ram+i);
  1581. }
  1582. }
  1583. for (i = 0; i < last; i += RAM_INCREMENT)
  1584. if (readl(eni_dev->ram+i) != i) break;
  1585. eni_dev->mem = i;
  1586. memset_io(eni_dev->ram,0,eni_dev->mem);
  1587. /* TODO: should shrink allocation now */
  1588. printk("mem=%dkB (",eni_dev->mem >> 10);
  1589. /* TODO: check for non-SUNI, check for TAXI ? */
  1590. if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
  1591. printk(")\n");
  1592. printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
  1593. dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
  1594. error = -EINVAL;
  1595. goto unmap;
  1596. }
  1597. error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
  1598. if (error)
  1599. goto unmap;
  1600. for (i = 0; i < ESI_LEN; i++)
  1601. printk("%s%02X",i ? "-" : "",dev->esi[i]);
  1602. printk(")\n");
  1603. printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
  1604. eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
  1605. media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
  1606. error = suni_init(dev);
  1607. if (error)
  1608. goto unmap;
  1609. out:
  1610. return error;
  1611. unmap:
  1612. iounmap(base);
  1613. goto out;
  1614. }
  1615. static void eni_do_release(struct atm_dev *dev)
  1616. {
  1617. struct eni_dev *ed = ENI_DEV(dev);
  1618. dev->phy->stop(dev);
  1619. dev->phy = NULL;
  1620. iounmap(ed->ioaddr);
  1621. }
  1622. static int eni_start(struct atm_dev *dev)
  1623. {
  1624. struct eni_dev *eni_dev;
  1625. void __iomem *buf;
  1626. unsigned long buffer_mem;
  1627. int error;
  1628. DPRINTK(">eni_start\n");
  1629. eni_dev = ENI_DEV(dev);
  1630. if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
  1631. printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
  1632. dev->number,eni_dev->irq);
  1633. error = -EAGAIN;
  1634. goto out;
  1635. }
  1636. pci_set_master(eni_dev->pci_dev);
  1637. if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
  1638. PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
  1639. (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
  1640. printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
  1641. "master (0x%02x)\n",dev->number,error);
  1642. goto free_irq;
  1643. }
  1644. if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
  1645. END_SWAP_DMA))) {
  1646. printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
  1647. "(0x%02x)\n",dev->number,error);
  1648. goto free_irq;
  1649. }
  1650. /* determine addresses of internal tables */
  1651. eni_dev->vci = eni_dev->ram;
  1652. eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
  1653. eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
  1654. eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
  1655. buf = eni_dev->service+NR_SERVICE*4;
  1656. DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
  1657. eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
  1658. eni_dev->service,buf);
  1659. spin_lock_init(&eni_dev->lock);
  1660. tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
  1661. eni_dev->events = 0;
  1662. /* initialize memory management */
  1663. buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
  1664. eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
  1665. eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
  1666. sizeof(*eni_dev->free_list),
  1667. GFP_KERNEL);
  1668. if (!eni_dev->free_list) {
  1669. printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
  1670. dev->number);
  1671. error = -ENOMEM;
  1672. goto free_irq;
  1673. }
  1674. eni_dev->free_len = 0;
  1675. eni_put_free(eni_dev,buf,buffer_mem);
  1676. memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
  1677. /*
  1678. * byte_addr free (k)
  1679. * 0x00000000 512 VCI table
  1680. * 0x00004000 496 RX DMA
  1681. * 0x00005000 492 TX DMA
  1682. * 0x00006000 488 service list
  1683. * 0x00007000 484 buffers
  1684. * 0x00080000 0 end (512kB)
  1685. */
  1686. eni_out(0xffffffff,MID_IE);
  1687. error = start_tx(dev);
  1688. if (error) goto free_list;
  1689. error = start_rx(dev);
  1690. if (error) goto free_list;
  1691. error = dev->phy->start(dev);
  1692. if (error) goto free_list;
  1693. eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
  1694. MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
  1695. MID_MC_S);
  1696. /* Tonga uses SBus INTReq1 */
  1697. (void) eni_in(MID_ISA); /* clear Midway interrupts */
  1698. return 0;
  1699. free_list:
  1700. kfree(eni_dev->free_list);
  1701. free_irq:
  1702. free_irq(eni_dev->irq, dev);
  1703. out:
  1704. return error;
  1705. }
  1706. static void eni_close(struct atm_vcc *vcc)
  1707. {
  1708. DPRINTK(">eni_close\n");
  1709. if (!ENI_VCC(vcc)) return;
  1710. clear_bit(ATM_VF_READY,&vcc->flags);
  1711. close_rx(vcc);
  1712. close_tx(vcc);
  1713. DPRINTK("eni_close: done waiting\n");
  1714. /* deallocate memory */
  1715. kfree(ENI_VCC(vcc));
  1716. vcc->dev_data = NULL;
  1717. clear_bit(ATM_VF_ADDR,&vcc->flags);
  1718. /*foo();*/
  1719. }
  1720. static int eni_open(struct atm_vcc *vcc)
  1721. {
  1722. struct eni_vcc *eni_vcc;
  1723. int error;
  1724. short vpi = vcc->vpi;
  1725. int vci = vcc->vci;
  1726. DPRINTK(">eni_open\n");
  1727. EVENT("eni_open\n",0,0);
  1728. if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
  1729. vcc->dev_data = NULL;
  1730. if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
  1731. set_bit(ATM_VF_ADDR,&vcc->flags);
  1732. if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
  1733. return -EINVAL;
  1734. DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
  1735. vcc->vci);
  1736. if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
  1737. eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
  1738. if (!eni_vcc) return -ENOMEM;
  1739. vcc->dev_data = eni_vcc;
  1740. eni_vcc->tx = NULL; /* for eni_close after open_rx */
  1741. if ((error = open_rx_first(vcc))) {
  1742. eni_close(vcc);
  1743. return error;
  1744. }
  1745. if ((error = open_tx_first(vcc))) {
  1746. eni_close(vcc);
  1747. return error;
  1748. }
  1749. }
  1750. if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
  1751. if ((error = open_rx_second(vcc))) {
  1752. eni_close(vcc);
  1753. return error;
  1754. }
  1755. if ((error = open_tx_second(vcc))) {
  1756. eni_close(vcc);
  1757. return error;
  1758. }
  1759. set_bit(ATM_VF_READY,&vcc->flags);
  1760. /* should power down SUNI while !ref_count @@@ */
  1761. return 0;
  1762. }
  1763. static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
  1764. {
  1765. struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
  1766. struct eni_tx *tx = ENI_VCC(vcc)->tx;
  1767. struct sk_buff *skb;
  1768. int error,rate,rsv,shp;
  1769. if (qos->txtp.traffic_class == ATM_NONE) return 0;
  1770. if (tx == eni_dev->ubr) return -EBADFD;
  1771. rate = atm_pcr_goal(&qos->txtp);
  1772. if (rate < 0) rate = -rate;
  1773. rsv = shp = 0;
  1774. if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
  1775. if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
  1776. if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
  1777. if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
  1778. if (!rsv && !shp) return 0;
  1779. error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
  1780. if (error) return error;
  1781. if (shp && !(flgs & ATM_MF_IMMED)) return 0;
  1782. /*
  1783. * Walk through the send buffer and patch the rate information in all
  1784. * segmentation buffer descriptors of this VCC.
  1785. */
  1786. tasklet_disable(&eni_dev->task);
  1787. skb_queue_walk(&eni_dev->tx_queue, skb) {
  1788. void __iomem *dsc;
  1789. if (ATM_SKB(skb)->vcc != vcc) continue;
  1790. dsc = tx->send+ENI_PRV_POS(skb)*4;
  1791. writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
  1792. (tx->prescaler << MID_SEG_PR_SHIFT) |
  1793. (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
  1794. }
  1795. tasklet_enable(&eni_dev->task);
  1796. return 0;
  1797. }
  1798. static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
  1799. {
  1800. struct eni_dev *eni_dev = ENI_DEV(dev);
  1801. if (cmd == ENI_MEMDUMP) {
  1802. if (!capable(CAP_NET_ADMIN)) return -EPERM;
  1803. printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
  1804. "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
  1805. dump(dev);
  1806. return 0;
  1807. }
  1808. if (cmd == ENI_SETMULT) {
  1809. struct eni_multipliers mult;
  1810. if (!capable(CAP_NET_ADMIN)) return -EPERM;
  1811. if (copy_from_user(&mult, arg,
  1812. sizeof(struct eni_multipliers)))
  1813. return -EFAULT;
  1814. if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
  1815. mult.tx > 65536 || mult.rx > 65536)
  1816. return -EINVAL;
  1817. if (mult.tx) eni_dev->tx_mult = mult.tx;
  1818. if (mult.rx) eni_dev->rx_mult = mult.rx;
  1819. return 0;
  1820. }
  1821. if (cmd == ATM_SETCIRANGE) {
  1822. struct atm_cirange ci;
  1823. if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
  1824. return -EFAULT;
  1825. if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
  1826. (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
  1827. return 0;
  1828. return -EINVAL;
  1829. }
  1830. if (!dev->phy->ioctl) return -ENOIOCTLCMD;
  1831. return dev->phy->ioctl(dev,cmd,arg);
  1832. }
  1833. static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
  1834. {
  1835. enum enq_res res;
  1836. DPRINTK(">eni_send\n");
  1837. if (!ENI_VCC(vcc)->tx) {
  1838. if (vcc->pop) vcc->pop(vcc,skb);
  1839. else dev_kfree_skb(skb);
  1840. return -EINVAL;
  1841. }
  1842. if (!skb) {
  1843. printk(KERN_CRIT "!skb in eni_send ?\n");
  1844. if (vcc->pop) vcc->pop(vcc,skb);
  1845. return -EINVAL;
  1846. }
  1847. if (vcc->qos.aal == ATM_AAL0) {
  1848. if (skb->len != ATM_CELL_SIZE-1) {
  1849. if (vcc->pop) vcc->pop(vcc,skb);
  1850. else dev_kfree_skb(skb);
  1851. return -EINVAL;
  1852. }
  1853. *(u32 *) skb->data = htonl(*(u32 *) skb->data);
  1854. }
  1855. submitted++;
  1856. ATM_SKB(skb)->vcc = vcc;
  1857. tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);
  1858. res = do_tx(skb);
  1859. tasklet_enable(&ENI_DEV(vcc->dev)->task);
  1860. if (res == enq_ok) return 0;
  1861. skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
  1862. backlogged++;
  1863. tasklet_schedule(&ENI_DEV(vcc->dev)->task);
  1864. return 0;
  1865. }
  1866. static void eni_phy_put(struct atm_dev *dev,unsigned char value,
  1867. unsigned long addr)
  1868. {
  1869. writel(value,ENI_DEV(dev)->phy+addr*4);
  1870. }
  1871. static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
  1872. {
  1873. return readl(ENI_DEV(dev)->phy+addr*4);
  1874. }
  1875. static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
  1876. {
  1877. struct sock *s;
  1878. static const char *signal[] = { "LOST","unknown","okay" };
  1879. struct eni_dev *eni_dev = ENI_DEV(dev);
  1880. struct atm_vcc *vcc;
  1881. int left,i;
  1882. left = *pos;
  1883. if (!left)
  1884. return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
  1885. "%d cps remaining\n",dev->number,signal[(int) dev->signal],
  1886. eni_dev->mem >> 10,eni_dev->tx_bw);
  1887. if (!--left)
  1888. return sprintf(page,"%4sBursts: TX"
  1889. #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
  1890. !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
  1891. !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
  1892. !defined(CONFIG_ATM_ENI_BURST_TX_2W)
  1893. " none"
  1894. #endif
  1895. #ifdef CONFIG_ATM_ENI_BURST_TX_16W
  1896. " 16W"
  1897. #endif
  1898. #ifdef CONFIG_ATM_ENI_BURST_TX_8W
  1899. " 8W"
  1900. #endif
  1901. #ifdef CONFIG_ATM_ENI_BURST_TX_4W
  1902. " 4W"
  1903. #endif
  1904. #ifdef CONFIG_ATM_ENI_BURST_TX_2W
  1905. " 2W"
  1906. #endif
  1907. ", RX"
  1908. #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
  1909. !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
  1910. !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
  1911. !defined(CONFIG_ATM_ENI_BURST_RX_2W)
  1912. " none"
  1913. #endif
  1914. #ifdef CONFIG_ATM_ENI_BURST_RX_16W
  1915. " 16W"
  1916. #endif
  1917. #ifdef CONFIG_ATM_ENI_BURST_RX_8W
  1918. " 8W"
  1919. #endif
  1920. #ifdef CONFIG_ATM_ENI_BURST_RX_4W
  1921. " 4W"
  1922. #endif
  1923. #ifdef CONFIG_ATM_ENI_BURST_RX_2W
  1924. " 2W"
  1925. #endif
  1926. #ifndef CONFIG_ATM_ENI_TUNE_BURST
  1927. " (default)"
  1928. #endif
  1929. "\n","");
  1930. if (!--left)
  1931. return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
  1932. "",eni_dev->tx_mult,eni_dev->rx_mult);
  1933. for (i = 0; i < NR_CHAN; i++) {
  1934. struct eni_tx *tx = eni_dev->tx+i;
  1935. if (!tx->send) continue;
  1936. if (!--left) {
  1937. return sprintf(page, "tx[%d]: 0x%lx-0x%lx "
  1938. "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
  1939. (unsigned long) (tx->send - eni_dev->ram),
  1940. tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
  1941. tx->reserved,tx->shaping,
  1942. tx == eni_dev->ubr ? " (UBR)" : "");
  1943. }
  1944. if (--left) continue;
  1945. return sprintf(page,"%10sbacklog %u packets\n","",
  1946. skb_queue_len(&tx->backlog));
  1947. }
  1948. read_lock(&vcc_sklist_lock);
  1949. for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
  1950. struct hlist_head *head = &vcc_hash[i];
  1951. sk_for_each(s, head) {
  1952. struct eni_vcc *eni_vcc;
  1953. int length;
  1954. vcc = atm_sk(s);
  1955. if (vcc->dev != dev)
  1956. continue;
  1957. eni_vcc = ENI_VCC(vcc);
  1958. if (--left) continue;
  1959. length = sprintf(page,"vcc %4d: ",vcc->vci);
  1960. if (eni_vcc->rx) {
  1961. length += sprintf(page+length, "0x%lx-0x%lx "
  1962. "(%6ld bytes)",
  1963. (unsigned long) (eni_vcc->recv - eni_dev->ram),
  1964. eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
  1965. eni_vcc->words*4);
  1966. if (eni_vcc->tx) length += sprintf(page+length,", ");
  1967. }
  1968. if (eni_vcc->tx)
  1969. length += sprintf(page+length,"tx[%d], txing %d bytes",
  1970. eni_vcc->tx->index,eni_vcc->txing);
  1971. page[length] = '\n';
  1972. read_unlock(&vcc_sklist_lock);
  1973. return length+1;
  1974. }
  1975. }
  1976. read_unlock(&vcc_sklist_lock);
  1977. for (i = 0; i < eni_dev->free_len; i++) {
  1978. struct eni_free *fe = eni_dev->free_list+i;
  1979. unsigned long offset;
  1980. if (--left) continue;
  1981. offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
  1982. return sprintf(page,"free %p-%p (%6d bytes)\n",
  1983. fe->start-offset,fe->start-offset+(1 << fe->order)-1,
  1984. 1 << fe->order);
  1985. }
  1986. return 0;
  1987. }
  1988. static const struct atmdev_ops ops = {
  1989. .open = eni_open,
  1990. .close = eni_close,
  1991. .ioctl = eni_ioctl,
  1992. .send = eni_send,
  1993. .phy_put = eni_phy_put,
  1994. .phy_get = eni_phy_get,
  1995. .change_qos = eni_change_qos,
  1996. .proc_read = eni_proc_read
  1997. };
  1998. static int eni_init_one(struct pci_dev *pci_dev,
  1999. const struct pci_device_id *ent)
  2000. {
  2001. struct atm_dev *dev;
  2002. struct eni_dev *eni_dev;
  2003. struct eni_zero *zero;
  2004. int rc;
  2005. rc = pci_enable_device(pci_dev);
  2006. if (rc < 0)
  2007. goto out;
  2008. rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
  2009. if (rc < 0)
  2010. goto err_disable;
  2011. rc = -ENOMEM;
  2012. eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
  2013. if (!eni_dev)
  2014. goto err_disable;
  2015. zero = &eni_dev->zero;
  2016. zero->addr = dma_alloc_coherent(&pci_dev->dev,
  2017. ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
  2018. if (!zero->addr)
  2019. goto err_kfree;
  2020. dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
  2021. if (!dev)
  2022. goto err_free_consistent;
  2023. dev->dev_data = eni_dev;
  2024. pci_set_drvdata(pci_dev, dev);
  2025. eni_dev->pci_dev = pci_dev;
  2026. eni_dev->asic = ent->driver_data;
  2027. rc = eni_do_init(dev);
  2028. if (rc < 0)
  2029. goto err_unregister;
  2030. rc = eni_start(dev);
  2031. if (rc < 0)
  2032. goto err_eni_release;
  2033. eni_dev->more = eni_boards;
  2034. eni_boards = dev;
  2035. out:
  2036. return rc;
  2037. err_eni_release:
  2038. dev->phy = NULL;
  2039. iounmap(ENI_DEV(dev)->ioaddr);
  2040. err_unregister:
  2041. atm_dev_deregister(dev);
  2042. err_free_consistent:
  2043. dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
  2044. err_kfree:
  2045. kfree(eni_dev);
  2046. err_disable:
  2047. pci_disable_device(pci_dev);
  2048. goto out;
  2049. }
  2050. static const struct pci_device_id eni_pci_tbl[] = {
  2051. { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
  2052. { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
  2053. { 0, }
  2054. };
  2055. MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
  2056. static void eni_remove_one(struct pci_dev *pdev)
  2057. {
  2058. struct atm_dev *dev = pci_get_drvdata(pdev);
  2059. struct eni_dev *ed = ENI_DEV(dev);
  2060. struct eni_zero *zero = &ed->zero;
  2061. eni_do_release(dev);
  2062. atm_dev_deregister(dev);
  2063. dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
  2064. kfree(ed);
  2065. pci_disable_device(pdev);
  2066. }
  2067. static struct pci_driver eni_driver = {
  2068. .name = DEV_LABEL,
  2069. .id_table = eni_pci_tbl,
  2070. .probe = eni_init_one,
  2071. .remove = eni_remove_one,
  2072. };
  2073. static int __init eni_init(void)
  2074. {
  2075. struct sk_buff *skb; /* dummy for sizeof */
  2076. BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
  2077. return pci_register_driver(&eni_driver);
  2078. }
  2079. module_init(eni_init);
  2080. /* @@@ since exit routine not defined, this module can not be unloaded */
  2081. MODULE_LICENSE("GPL");