Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ |
3 | ||
4 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
5 | ||
6 | ||
7 | #include <linux/module.h> | |
1da177e4 LT |
8 | #include <linux/kernel.h> |
9 | #include <linux/mm.h> | |
10 | #include <linux/pci.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/atm.h> | |
13 | #include <linux/atmdev.h> | |
14 | #include <linux/sonet.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/uio.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/atm_eni.h> | |
21 | #include <linux/bitops.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1da177e4 | 23 | #include <asm/io.h> |
60063497 | 24 | #include <linux/atomic.h> |
7c0f6ba6 | 25 | #include <linux/uaccess.h> |
1da177e4 LT |
26 | #include <asm/string.h> |
27 | #include <asm/byteorder.h> | |
28 | ||
29 | #include "tonga.h" | |
30 | #include "midway.h" | |
31 | #include "suni.h" | |
32 | #include "eni.h" | |
33 | ||
34 | #if !defined(__i386__) && !defined(__x86_64__) | |
35 | #ifndef ioremap_nocache | |
36 | #define ioremap_nocache(X,Y) ioremap(X,Y) | |
37 | #endif | |
38 | #endif | |
39 | ||
40 | /* | |
41 | * TODO: | |
42 | * | |
43 | * Show stoppers | |
44 | * none | |
45 | * | |
46 | * Minor | |
47 | * - OAM support | |
48 | * - fix bugs listed below | |
49 | */ | |
50 | ||
51 | /* | |
52 | * KNOWN BUGS: | |
53 | * | |
54 | * - may run into JK-JK bug and deadlock | |
55 | * - should allocate UBR channel first | |
56 | * - buffer space allocation algorithm is stupid | |
57 | * (RX: should be maxSDU+maxdelay*rate | |
58 | * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) | |
59 | * - doesn't support OAM cells | |
60 | * - eni_put_free may hang if not putting memory fragments that _complete_ | |
61 | * 2^n block (never happens in real life, though) | |
1da177e4 LT |
62 | */ |
63 | ||
64 | ||
65 | #if 0 | |
66 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
67 | #else | |
68 | #define DPRINTK(format,args...) | |
69 | #endif | |
70 | ||
71 | ||
72 | #ifndef CONFIG_ATM_ENI_TUNE_BURST | |
73 | #define CONFIG_ATM_ENI_BURST_TX_8W | |
74 | #define CONFIG_ATM_ENI_BURST_RX_4W | |
75 | #endif | |
76 | ||
77 | ||
78 | #ifndef CONFIG_ATM_ENI_DEBUG | |
79 | ||
80 | ||
81 | #define NULLCHECK(x) | |
82 | ||
83 | #define EVENT(s,a,b) | |
84 | ||
85 | ||
86 | static void event_dump(void) | |
87 | { | |
88 | } | |
89 | ||
90 | ||
91 | #else | |
92 | ||
93 | ||
94 | /* | |
95 | * NULL pointer checking | |
96 | */ | |
97 | ||
98 | #define NULLCHECK(x) \ | |
99 | if ((unsigned long) (x) < 0x30) \ | |
100 | printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) | |
101 | ||
102 | /* | |
103 | * Very extensive activity logging. Greatly improves bug detection speed but | |
104 | * costs a few Mbps if enabled. | |
105 | */ | |
106 | ||
107 | #define EV 64 | |
108 | ||
109 | static const char *ev[EV]; | |
110 | static unsigned long ev_a[EV],ev_b[EV]; | |
111 | static int ec = 0; | |
112 | ||
113 | ||
114 | static void EVENT(const char *s,unsigned long a,unsigned long b) | |
115 | { | |
116 | ev[ec] = s; | |
117 | ev_a[ec] = a; | |
118 | ev_b[ec] = b; | |
119 | ec = (ec+1) % EV; | |
120 | } | |
121 | ||
122 | ||
123 | static void event_dump(void) | |
124 | { | |
125 | int n,i; | |
126 | ||
127 | for (n = 0; n < EV; n++) { | |
128 | i = (ec+n) % EV; | |
129 | printk(KERN_NOTICE); | |
130 | printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); | |
131 | } | |
132 | } | |
133 | ||
134 | ||
135 | #endif /* CONFIG_ATM_ENI_DEBUG */ | |
136 | ||
137 | ||
138 | /* | |
139 | * NExx must not be equal at end | |
140 | * EExx may be equal at end | |
141 | * xxPJOK verify validity of pointer jumps | |
142 | * xxPMOK operating on a circular buffer of "c" words | |
143 | */ | |
144 | ||
145 | #define NEPJOK(a0,a1,b) \ | |
146 | ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) | |
147 | #define EEPJOK(a0,a1,b) \ | |
148 | ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) | |
149 | #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) | |
150 | #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) | |
151 | ||
152 | ||
153 | static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, | |
154 | backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, | |
155 | putting = 0; | |
156 | ||
157 | static struct atm_dev *eni_boards = NULL; | |
158 | ||
1da177e4 LT |
159 | /* Read/write registers on card */ |
160 | #define eni_in(r) readl(eni_dev->reg+(r)*4) | |
161 | #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) | |
162 | ||
163 | ||
164 | /*-------------------------------- utilities --------------------------------*/ | |
165 | ||
166 | ||
167 | static void dump_mem(struct eni_dev *eni_dev) | |
168 | { | |
169 | int i; | |
170 | ||
171 | for (i = 0; i < eni_dev->free_len; i++) | |
172 | printk(KERN_DEBUG " %d: %p %d\n",i, | |
173 | eni_dev->free_list[i].start, | |
174 | 1 << eni_dev->free_list[i].order); | |
175 | } | |
176 | ||
177 | ||
178 | static void dump(struct atm_dev *dev) | |
179 | { | |
180 | struct eni_dev *eni_dev; | |
181 | ||
182 | int i; | |
183 | ||
184 | eni_dev = ENI_DEV(dev); | |
185 | printk(KERN_NOTICE "Free memory\n"); | |
186 | dump_mem(eni_dev); | |
187 | printk(KERN_NOTICE "TX buffers\n"); | |
188 | for (i = 0; i < NR_CHAN; i++) | |
189 | if (eni_dev->tx[i].send) | |
190 | printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, | |
191 | eni_dev->tx[i].send,eni_dev->tx[i].words*4); | |
192 | printk(KERN_NOTICE "RX buffers\n"); | |
193 | for (i = 0; i < 1024; i++) | |
194 | if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) | |
195 | printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, | |
196 | ENI_VCC(eni_dev->rx_map[i])->recv, | |
197 | ENI_VCC(eni_dev->rx_map[i])->words*4); | |
198 | printk(KERN_NOTICE "----\n"); | |
199 | } | |
200 | ||
201 | ||
202 | static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, | |
203 | unsigned long size) | |
204 | { | |
205 | struct eni_free *list; | |
206 | int len,order; | |
207 | ||
208 | DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); | |
209 | start += eni_dev->base_diff; | |
210 | list = eni_dev->free_list; | |
211 | len = eni_dev->free_len; | |
212 | while (size) { | |
213 | if (len >= eni_dev->free_list_size) { | |
214 | printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", | |
215 | start,size); | |
216 | break; | |
217 | } | |
218 | for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); | |
219 | if (MID_MIN_BUF_SIZE > (1 << order)) { | |
220 | printk(KERN_CRIT "eni_put_free: order %d too small\n", | |
221 | order); | |
222 | break; | |
223 | } | |
224 | list[len].start = (void __iomem *) start; | |
225 | list[len].order = order; | |
226 | len++; | |
227 | start += 1 << order; | |
228 | size -= 1 << order; | |
229 | } | |
230 | eni_dev->free_len = len; | |
231 | /*dump_mem(eni_dev);*/ | |
232 | } | |
233 | ||
234 | ||
235 | static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) | |
236 | { | |
237 | struct eni_free *list; | |
238 | void __iomem *start; | |
239 | int len,i,order,best_order,index; | |
240 | ||
241 | list = eni_dev->free_list; | |
242 | len = eni_dev->free_len; | |
243 | if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; | |
244 | if (*size > MID_MAX_BUF_SIZE) return NULL; | |
3e73cc5c NC |
245 | for (order = 0; (1 << order) < *size; order++) |
246 | ; | |
1da177e4 LT |
247 | DPRINTK("trying: %ld->%d\n",*size,order); |
248 | best_order = 65; /* we don't have more than 2^64 of anything ... */ | |
249 | index = 0; /* silence GCC */ | |
250 | for (i = 0; i < len; i++) | |
251 | if (list[i].order == order) { | |
252 | best_order = order; | |
253 | index = i; | |
254 | break; | |
255 | } | |
256 | else if (best_order > list[i].order && list[i].order > order) { | |
257 | best_order = list[i].order; | |
258 | index = i; | |
259 | } | |
260 | if (best_order == 65) return NULL; | |
261 | start = list[index].start-eni_dev->base_diff; | |
262 | list[index] = list[--len]; | |
263 | eni_dev->free_len = len; | |
264 | *size = 1 << order; | |
265 | eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); | |
266 | DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); | |
267 | memset_io(start,0,*size); /* never leak data */ | |
268 | /*dump_mem(eni_dev);*/ | |
269 | return start; | |
270 | } | |
271 | ||
272 | ||
273 | static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, | |
274 | unsigned long size) | |
275 | { | |
276 | struct eni_free *list; | |
277 | int len,i,order; | |
278 | ||
279 | start += eni_dev->base_diff; | |
280 | list = eni_dev->free_list; | |
281 | len = eni_dev->free_len; | |
282 | for (order = -1; size; order++) size >>= 1; | |
283 | DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); | |
284 | for (i = 0; i < len; i++) | |
285 | if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && | |
286 | list[i].order == order) { | |
287 | DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, | |
288 | list[i].start,start,1 << order,list[i].order,order); | |
289 | list[i] = list[--len]; | |
290 | start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); | |
291 | order++; | |
292 | i = -1; | |
293 | continue; | |
294 | } | |
295 | if (len >= eni_dev->free_list_size) { | |
296 | printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, | |
297 | order); | |
298 | return; | |
299 | } | |
300 | list[len].start = start; | |
301 | list[len].order = order; | |
302 | eni_dev->free_len = len+1; | |
303 | /*dump_mem(eni_dev);*/ | |
304 | } | |
305 | ||
306 | ||
307 | /*----------------------------------- RX ------------------------------------*/ | |
308 | ||
309 | ||
310 | #define ENI_VCC_NOS ((struct atm_vcc *) 1) | |
311 | ||
312 | ||
313 | static void rx_ident_err(struct atm_vcc *vcc) | |
314 | { | |
315 | struct atm_dev *dev; | |
316 | struct eni_dev *eni_dev; | |
317 | struct eni_vcc *eni_vcc; | |
318 | ||
319 | dev = vcc->dev; | |
320 | eni_dev = ENI_DEV(dev); | |
321 | /* immediately halt adapter */ | |
322 | eni_out(eni_in(MID_MC_S) & | |
323 | ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); | |
324 | /* dump useful information */ | |
325 | eni_vcc = ENI_VCC(vcc); | |
326 | printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " | |
327 | "mismatch\n",dev->number); | |
328 | printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, | |
329 | eni_vcc->rxing,eni_vcc->words); | |
330 | printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " | |
331 | "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, | |
332 | (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); | |
333 | printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, | |
334 | eni_vcc->servicing); | |
335 | EVENT("---dump ends here---\n",0,0); | |
336 | printk(KERN_NOTICE "---recent events---\n"); | |
337 | event_dump(); | |
338 | ENI_DEV(dev)->fast = NULL; /* really stop it */ | |
339 | ENI_DEV(dev)->slow = NULL; | |
340 | skb_queue_head_init(&ENI_DEV(dev)->rx_queue); | |
341 | } | |
342 | ||
343 | ||
344 | static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, | |
345 | unsigned long skip,unsigned long size,unsigned long eff) | |
346 | { | |
347 | struct eni_dev *eni_dev; | |
348 | struct eni_vcc *eni_vcc; | |
349 | u32 dma_rd,dma_wr; | |
350 | u32 dma[RX_DMA_BUF*2]; | |
351 | dma_addr_t paddr; | |
352 | unsigned long here; | |
353 | int i,j; | |
354 | ||
355 | eni_dev = ENI_DEV(vcc->dev); | |
356 | eni_vcc = ENI_VCC(vcc); | |
357 | paddr = 0; /* GCC, shut up */ | |
358 | if (skb) { | |
ede58ef2 C |
359 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
360 | DMA_FROM_DEVICE); | |
361 | if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) | |
54167558 | 362 | goto dma_map_error; |
1da177e4 LT |
363 | ENI_PRV_PADDR(skb) = paddr; |
364 | if (paddr & 3) | |
365 | printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " | |
366 | "mis-aligned RX data (0x%lx)\n",vcc->dev->number, | |
367 | vcc->vci,(unsigned long) paddr); | |
368 | ENI_PRV_SIZE(skb) = size+skip; | |
369 | /* PDU plus descriptor */ | |
370 | ATM_SKB(skb)->vcc = vcc; | |
371 | } | |
372 | j = 0; | |
373 | if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ | |
374 | here = (eni_vcc->descr+skip) & (eni_vcc->words-1); | |
375 | dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci | |
376 | << MID_DMA_VCI_SHIFT) | MID_DT_JK; | |
377 | j++; | |
378 | } | |
379 | here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); | |
380 | if (!eff) size += skip; | |
381 | else { | |
382 | unsigned long words; | |
383 | ||
384 | if (!size) { | |
385 | DPRINTK("strange things happen ...\n"); | |
386 | EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", | |
387 | size,eff); | |
388 | } | |
389 | words = eff; | |
390 | if (paddr & 15) { | |
391 | unsigned long init; | |
392 | ||
393 | init = 4-((paddr & 15) >> 2); | |
394 | if (init > words) init = words; | |
395 | dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | | |
396 | (vcc->vci << MID_DMA_VCI_SHIFT); | |
397 | dma[j++] = paddr; | |
398 | paddr += init << 2; | |
399 | words -= init; | |
400 | } | |
401 | #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ | |
402 | if (words & ~15) { | |
403 | dma[j++] = MID_DT_16W | ((words >> 4) << | |
404 | MID_DMA_COUNT_SHIFT) | (vcc->vci << | |
405 | MID_DMA_VCI_SHIFT); | |
406 | dma[j++] = paddr; | |
407 | paddr += (words & ~15) << 2; | |
408 | words &= 15; | |
409 | } | |
410 | #endif | |
411 | #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ | |
412 | if (words & ~7) { | |
413 | dma[j++] = MID_DT_8W | ((words >> 3) << | |
414 | MID_DMA_COUNT_SHIFT) | (vcc->vci << | |
415 | MID_DMA_VCI_SHIFT); | |
416 | dma[j++] = paddr; | |
417 | paddr += (words & ~7) << 2; | |
418 | words &= 7; | |
419 | } | |
420 | #endif | |
421 | #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ | |
422 | if (words & ~3) { | |
423 | dma[j++] = MID_DT_4W | ((words >> 2) << | |
424 | MID_DMA_COUNT_SHIFT) | (vcc->vci << | |
425 | MID_DMA_VCI_SHIFT); | |
426 | dma[j++] = paddr; | |
427 | paddr += (words & ~3) << 2; | |
428 | words &= 3; | |
429 | } | |
430 | #endif | |
431 | #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ | |
432 | if (words & ~1) { | |
433 | dma[j++] = MID_DT_2W | ((words >> 1) << | |
434 | MID_DMA_COUNT_SHIFT) | (vcc->vci << | |
435 | MID_DMA_VCI_SHIFT); | |
436 | dma[j++] = paddr; | |
437 | paddr += (words & ~1) << 2; | |
438 | words &= 1; | |
439 | } | |
440 | #endif | |
441 | if (words) { | |
442 | dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | |
443 | | (vcc->vci << MID_DMA_VCI_SHIFT); | |
444 | dma[j++] = paddr; | |
445 | } | |
446 | } | |
447 | if (size != eff) { | |
448 | dma[j++] = (here << MID_DMA_COUNT_SHIFT) | | |
449 | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; | |
450 | j++; | |
451 | } | |
452 | if (!j || j > 2*RX_DMA_BUF) { | |
453 | printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); | |
454 | goto trouble; | |
455 | } | |
456 | dma[j-2] |= MID_DMA_END; | |
457 | j = j >> 1; | |
458 | dma_wr = eni_in(MID_DMA_WR_RX); | |
459 | dma_rd = eni_in(MID_DMA_RD_RX); | |
460 | /* | |
461 | * Can I move the dma_wr pointer by 2j+1 positions without overwriting | |
462 | * data that hasn't been read (position of dma_rd) yet ? | |
463 | */ | |
464 | if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ | |
465 | printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", | |
466 | vcc->dev->number); | |
467 | goto trouble; | |
468 | } | |
469 | for (i = 0; i < j; i++) { | |
470 | writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); | |
471 | writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); | |
472 | dma_wr = (dma_wr+1) & (NR_DMA_RX-1); | |
473 | } | |
474 | if (skb) { | |
475 | ENI_PRV_POS(skb) = eni_vcc->descr+size+1; | |
476 | skb_queue_tail(&eni_dev->rx_queue,skb); | |
477 | eni_vcc->last = skb; | |
59c03699 | 478 | rx_enqueued++; |
1da177e4 LT |
479 | } |
480 | eni_vcc->descr = here; | |
481 | eni_out(dma_wr,MID_DMA_WR_RX); | |
482 | return 0; | |
483 | ||
484 | trouble: | |
485 | if (paddr) | |
ede58ef2 C |
486 | dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, |
487 | DMA_FROM_DEVICE); | |
54167558 | 488 | dma_map_error: |
1da177e4 LT |
489 | if (skb) dev_kfree_skb_irq(skb); |
490 | return -1; | |
491 | } | |
492 | ||
493 | ||
494 | static void discard(struct atm_vcc *vcc,unsigned long size) | |
495 | { | |
496 | struct eni_vcc *eni_vcc; | |
497 | ||
498 | eni_vcc = ENI_VCC(vcc); | |
499 | EVENT("discard (size=%ld)\n",size,0); | |
500 | while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); | |
501 | /* could do a full fallback, but that might be more expensive */ | |
502 | if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; | |
503 | else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); | |
504 | } | |
505 | ||
506 | ||
507 | /* | |
508 | * TODO: should check whether direct copies (without DMA setup, dequeuing on | |
509 | * interrupt, etc.) aren't much faster for AAL0 | |
510 | */ | |
511 | ||
512 | static int rx_aal0(struct atm_vcc *vcc) | |
513 | { | |
514 | struct eni_vcc *eni_vcc; | |
515 | unsigned long descr; | |
516 | unsigned long length; | |
517 | struct sk_buff *skb; | |
518 | ||
519 | DPRINTK(">rx_aal0\n"); | |
520 | eni_vcc = ENI_VCC(vcc); | |
521 | descr = readl(eni_vcc->recv+eni_vcc->descr*4); | |
522 | if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { | |
523 | rx_ident_err(vcc); | |
524 | return 1; | |
525 | } | |
526 | if (descr & MID_RED_T) { | |
527 | DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", | |
528 | vcc->dev->number); | |
529 | length = 0; | |
530 | atomic_inc(&vcc->stats->rx_err); | |
531 | } | |
532 | else { | |
533 | length = ATM_CELL_SIZE-1; /* no HEC */ | |
534 | } | |
535 | skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; | |
536 | if (!skb) { | |
537 | discard(vcc,length >> 2); | |
538 | return 0; | |
539 | } | |
540 | skb_put(skb,length); | |
8570419f | 541 | skb->tstamp = eni_vcc->timestamp; |
1da177e4 LT |
542 | DPRINTK("got len %ld\n",length); |
543 | if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; | |
544 | eni_vcc->rxing++; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | ||
549 | static int rx_aal5(struct atm_vcc *vcc) | |
550 | { | |
551 | struct eni_vcc *eni_vcc; | |
552 | unsigned long descr; | |
553 | unsigned long size,eff,length; | |
554 | struct sk_buff *skb; | |
555 | ||
556 | EVENT("rx_aal5\n",0,0); | |
557 | DPRINTK(">rx_aal5\n"); | |
558 | eni_vcc = ENI_VCC(vcc); | |
559 | descr = readl(eni_vcc->recv+eni_vcc->descr*4); | |
560 | if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { | |
561 | rx_ident_err(vcc); | |
562 | return 1; | |
563 | } | |
564 | if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { | |
565 | if (descr & MID_RED_T) { | |
566 | EVENT("empty cell (descr=0x%lx)\n",descr,0); | |
567 | DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", | |
568 | vcc->dev->number); | |
569 | size = 0; | |
570 | } | |
571 | else { | |
572 | static unsigned long silence = 0; | |
573 | ||
574 | if (time_after(jiffies, silence) || silence == 0) { | |
575 | printk(KERN_WARNING DEV_LABEL "(itf %d): " | |
576 | "discarding PDU(s) with CRC error\n", | |
577 | vcc->dev->number); | |
578 | silence = (jiffies+2*HZ)|1; | |
579 | } | |
580 | size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); | |
581 | EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, | |
582 | size); | |
583 | } | |
584 | eff = length = 0; | |
585 | atomic_inc(&vcc->stats->rx_err); | |
586 | } | |
587 | else { | |
588 | size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); | |
589 | DPRINTK("size=%ld\n",size); | |
590 | length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & | |
591 | (eni_vcc->words-1)))*4) & 0xffff; | |
592 | /* -trailer(2)+header(1) */ | |
593 | if (length && length <= (size << 2)-8 && length <= | |
594 | ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; | |
595 | else { /* ^ trailer length (8) */ | |
596 | EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, | |
597 | length); | |
598 | printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " | |
599 | "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", | |
600 | vcc->dev->number,vcc->vci,length,size << 2,descr); | |
601 | length = eff = 0; | |
602 | atomic_inc(&vcc->stats->rx_err); | |
603 | } | |
604 | } | |
605 | skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; | |
606 | if (!skb) { | |
607 | discard(vcc,size); | |
608 | return 0; | |
609 | } | |
610 | skb_put(skb,length); | |
611 | DPRINTK("got len %ld\n",length); | |
612 | if (do_rx_dma(vcc,skb,1,size,eff)) return 1; | |
613 | eni_vcc->rxing++; | |
614 | return 0; | |
615 | } | |
616 | ||
617 | ||
618 | static inline int rx_vcc(struct atm_vcc *vcc) | |
619 | { | |
620 | void __iomem *vci_dsc; | |
621 | unsigned long tmp; | |
622 | struct eni_vcc *eni_vcc; | |
623 | ||
624 | eni_vcc = ENI_VCC(vcc); | |
625 | vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; | |
626 | EVENT("rx_vcc(1)\n",0,0); | |
627 | while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> | |
628 | MID_VCI_DESCR_SHIFT)) { | |
629 | EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", | |
630 | eni_vcc->descr,tmp); | |
631 | DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, | |
632 | (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> | |
633 | MID_VCI_DESCR_SHIFT)); | |
634 | if (ENI_VCC(vcc)->rx(vcc)) return 1; | |
635 | } | |
636 | /* clear IN_SERVICE flag */ | |
637 | writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); | |
638 | /* | |
639 | * If new data has arrived between evaluating the while condition and | |
640 | * clearing IN_SERVICE, we wouldn't be notified until additional data | |
641 | * follows. So we have to loop again to be sure. | |
642 | */ | |
643 | EVENT("rx_vcc(3)\n",0,0); | |
644 | while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) | |
645 | >> MID_VCI_DESCR_SHIFT)) { | |
646 | EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", | |
647 | eni_vcc->descr,tmp); | |
648 | DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, | |
649 | (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> | |
650 | MID_VCI_DESCR_SHIFT)); | |
651 | if (ENI_VCC(vcc)->rx(vcc)) return 1; | |
652 | } | |
653 | return 0; | |
654 | } | |
655 | ||
656 | ||
657 | static void poll_rx(struct atm_dev *dev) | |
658 | { | |
659 | struct eni_dev *eni_dev; | |
660 | struct atm_vcc *curr; | |
661 | ||
662 | eni_dev = ENI_DEV(dev); | |
663 | while ((curr = eni_dev->fast)) { | |
664 | EVENT("poll_rx.fast\n",0,0); | |
665 | if (rx_vcc(curr)) return; | |
666 | eni_dev->fast = ENI_VCC(curr)->next; | |
667 | ENI_VCC(curr)->next = ENI_VCC_NOS; | |
668 | barrier(); | |
669 | ENI_VCC(curr)->servicing--; | |
670 | } | |
671 | while ((curr = eni_dev->slow)) { | |
672 | EVENT("poll_rx.slow\n",0,0); | |
673 | if (rx_vcc(curr)) return; | |
674 | eni_dev->slow = ENI_VCC(curr)->next; | |
675 | ENI_VCC(curr)->next = ENI_VCC_NOS; | |
676 | barrier(); | |
677 | ENI_VCC(curr)->servicing--; | |
678 | } | |
679 | } | |
680 | ||
681 | ||
682 | static void get_service(struct atm_dev *dev) | |
683 | { | |
684 | struct eni_dev *eni_dev; | |
685 | struct atm_vcc *vcc; | |
686 | unsigned long vci; | |
687 | ||
688 | DPRINTK(">get_service\n"); | |
689 | eni_dev = ENI_DEV(dev); | |
690 | while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { | |
691 | vci = readl(eni_dev->service+eni_dev->serv_read*4); | |
692 | eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); | |
693 | vcc = eni_dev->rx_map[vci & 1023]; | |
694 | if (!vcc) { | |
695 | printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " | |
696 | "found\n",dev->number,vci); | |
697 | continue; /* nasty but we try to go on anyway */ | |
698 | /* @@@ nope, doesn't work */ | |
699 | } | |
700 | EVENT("getting from service\n",0,0); | |
701 | if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { | |
702 | EVENT("double service\n",0,0); | |
703 | DPRINTK("Grr, servicing VCC %ld twice\n",vci); | |
704 | continue; | |
705 | } | |
8570419f | 706 | ENI_VCC(vcc)->timestamp = ktime_get_real(); |
1da177e4 LT |
707 | ENI_VCC(vcc)->next = NULL; |
708 | if (vcc->qos.rxtp.traffic_class == ATM_CBR) { | |
709 | if (eni_dev->fast) | |
710 | ENI_VCC(eni_dev->last_fast)->next = vcc; | |
711 | else eni_dev->fast = vcc; | |
712 | eni_dev->last_fast = vcc; | |
713 | } | |
714 | else { | |
715 | if (eni_dev->slow) | |
716 | ENI_VCC(eni_dev->last_slow)->next = vcc; | |
717 | else eni_dev->slow = vcc; | |
718 | eni_dev->last_slow = vcc; | |
719 | } | |
59c03699 | 720 | putting++; |
1da177e4 LT |
721 | ENI_VCC(vcc)->servicing++; |
722 | } | |
723 | } | |
724 | ||
725 | ||
726 | static void dequeue_rx(struct atm_dev *dev) | |
727 | { | |
728 | struct eni_dev *eni_dev; | |
729 | struct eni_vcc *eni_vcc; | |
730 | struct atm_vcc *vcc; | |
731 | struct sk_buff *skb; | |
732 | void __iomem *vci_dsc; | |
733 | int first; | |
734 | ||
735 | eni_dev = ENI_DEV(dev); | |
736 | first = 1; | |
737 | while (1) { | |
738 | skb = skb_dequeue(&eni_dev->rx_queue); | |
739 | if (!skb) { | |
740 | if (first) { | |
741 | DPRINTK(DEV_LABEL "(itf %d): RX but not " | |
742 | "rxing\n",dev->number); | |
743 | EVENT("nothing to dequeue\n",0,0); | |
744 | } | |
745 | break; | |
746 | } | |
747 | EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), | |
748 | ENI_PRV_POS(skb)); | |
59c03699 | 749 | rx_dequeued++; |
1da177e4 LT |
750 | vcc = ATM_SKB(skb)->vcc; |
751 | eni_vcc = ENI_VCC(vcc); | |
752 | first = 0; | |
753 | vci_dsc = eni_dev->vci+vcc->vci*16; | |
754 | if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), | |
755 | (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, | |
756 | eni_vcc->words)) { | |
757 | EVENT("requeuing\n",0,0); | |
758 | skb_queue_head(&eni_dev->rx_queue,skb); | |
759 | break; | |
760 | } | |
761 | eni_vcc->rxing--; | |
762 | eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); | |
ede58ef2 C |
763 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
764 | DMA_TO_DEVICE); | |
1da177e4 LT |
765 | if (!skb->len) dev_kfree_skb_irq(skb); |
766 | else { | |
767 | EVENT("pushing (len=%ld)\n",skb->len,0); | |
768 | if (vcc->qos.aal == ATM_AAL0) | |
769 | *(unsigned long *) skb->data = | |
770 | ntohl(*(unsigned long *) skb->data); | |
771 | memset(skb->cb,0,sizeof(struct eni_skb_prv)); | |
772 | vcc->push(vcc,skb); | |
773 | pushed++; | |
774 | } | |
775 | atomic_inc(&vcc->stats->rx); | |
776 | } | |
777 | wake_up(&eni_dev->rx_wait); | |
778 | } | |
779 | ||
780 | ||
781 | static int open_rx_first(struct atm_vcc *vcc) | |
782 | { | |
783 | struct eni_dev *eni_dev; | |
784 | struct eni_vcc *eni_vcc; | |
785 | unsigned long size; | |
786 | ||
787 | DPRINTK("open_rx_first\n"); | |
788 | eni_dev = ENI_DEV(vcc->dev); | |
789 | eni_vcc = ENI_VCC(vcc); | |
790 | eni_vcc->rx = NULL; | |
791 | if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; | |
792 | size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; | |
793 | if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= | |
794 | MID_MAX_BUF_SIZE) | |
795 | size = MID_MAX_BUF_SIZE; | |
796 | eni_vcc->recv = eni_alloc_mem(eni_dev,&size); | |
797 | DPRINTK("rx at 0x%lx\n",eni_vcc->recv); | |
798 | eni_vcc->words = size >> 2; | |
799 | if (!eni_vcc->recv) return -ENOBUFS; | |
800 | eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; | |
801 | eni_vcc->descr = 0; | |
802 | eni_vcc->rx_pos = 0; | |
803 | eni_vcc->rxing = 0; | |
804 | eni_vcc->servicing = 0; | |
805 | eni_vcc->next = ENI_VCC_NOS; | |
806 | return 0; | |
807 | } | |
808 | ||
809 | ||
810 | static int open_rx_second(struct atm_vcc *vcc) | |
811 | { | |
812 | void __iomem *here; | |
813 | struct eni_dev *eni_dev; | |
814 | struct eni_vcc *eni_vcc; | |
815 | unsigned long size; | |
816 | int order; | |
817 | ||
818 | DPRINTK("open_rx_second\n"); | |
819 | eni_dev = ENI_DEV(vcc->dev); | |
820 | eni_vcc = ENI_VCC(vcc); | |
821 | if (!eni_vcc->rx) return 0; | |
822 | /* set up VCI descriptor */ | |
823 | here = eni_dev->vci+vcc->vci*16; | |
824 | DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); | |
825 | size = eni_vcc->words >> 8; | |
826 | for (order = -1; size; order++) size >>= 1; | |
827 | writel(0,here+4); /* descr, read = 0 */ | |
828 | writel(0,here+8); /* write, state, count = 0 */ | |
829 | if (eni_dev->rx_map[vcc->vci]) | |
830 | printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " | |
831 | "in use\n",vcc->dev->number,vcc->vci); | |
832 | eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ | |
833 | writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << | |
834 | MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | | |
835 | (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << | |
836 | MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); | |
837 | return 0; | |
838 | } | |
839 | ||
840 | ||
841 | static void close_rx(struct atm_vcc *vcc) | |
842 | { | |
843 | DECLARE_WAITQUEUE(wait,current); | |
844 | void __iomem *here; | |
845 | struct eni_dev *eni_dev; | |
846 | struct eni_vcc *eni_vcc; | |
847 | ||
848 | eni_vcc = ENI_VCC(vcc); | |
849 | if (!eni_vcc->rx) return; | |
850 | eni_dev = ENI_DEV(vcc->dev); | |
851 | if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { | |
852 | here = eni_dev->vci+vcc->vci*16; | |
853 | /* block receiver */ | |
854 | writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << | |
855 | MID_VCI_MODE_SHIFT),here); | |
856 | /* wait for receiver to become idle */ | |
857 | udelay(27); | |
858 | /* discard pending cell */ | |
859 | writel(readl(here) & ~MID_VCI_IN_SERVICE,here); | |
860 | /* don't accept any new ones */ | |
861 | eni_dev->rx_map[vcc->vci] = NULL; | |
862 | /* wait for RX queue to drain */ | |
863 | DPRINTK("eni_close: waiting for RX ...\n"); | |
864 | EVENT("RX closing\n",0,0); | |
865 | add_wait_queue(&eni_dev->rx_wait,&wait); | |
866 | set_current_state(TASK_UNINTERRUPTIBLE); | |
867 | barrier(); | |
868 | for (;;) { | |
869 | /* transition service->rx: rxing++, servicing-- */ | |
870 | if (!eni_vcc->servicing) { | |
871 | barrier(); | |
872 | if (!eni_vcc->rxing) break; | |
873 | } | |
874 | EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, | |
875 | eni_vcc->servicing); | |
876 | printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, | |
877 | eni_vcc->rxing); | |
878 | schedule(); | |
879 | set_current_state(TASK_UNINTERRUPTIBLE); | |
880 | } | |
881 | for (;;) { | |
882 | int at_end; | |
883 | u32 tmp; | |
884 | ||
885 | tasklet_disable(&eni_dev->task); | |
886 | tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; | |
887 | at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; | |
888 | tasklet_enable(&eni_dev->task); | |
889 | if (at_end) break; | |
890 | EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", | |
891 | eni_vcc->rx_pos,tmp); | |
892 | printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", | |
893 | eni_vcc->rx_pos,tmp); | |
894 | schedule(); | |
895 | set_current_state(TASK_UNINTERRUPTIBLE); | |
896 | } | |
897 | set_current_state(TASK_RUNNING); | |
898 | remove_wait_queue(&eni_dev->rx_wait,&wait); | |
899 | } | |
900 | eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); | |
901 | eni_vcc->rx = NULL; | |
902 | } | |
903 | ||
904 | ||
905 | static int start_rx(struct atm_dev *dev) | |
906 | { | |
907 | struct eni_dev *eni_dev; | |
908 | ||
909 | eni_dev = ENI_DEV(dev); | |
910 | eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); | |
911 | if (!eni_dev->rx_map) { | |
912 | printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", | |
913 | dev->number); | |
914 | free_page((unsigned long) eni_dev->free_list); | |
915 | return -ENOMEM; | |
916 | } | |
1da177e4 LT |
917 | eni_dev->rx_mult = DEFAULT_RX_MULT; |
918 | eni_dev->fast = eni_dev->last_fast = NULL; | |
919 | eni_dev->slow = eni_dev->last_slow = NULL; | |
920 | init_waitqueue_head(&eni_dev->rx_wait); | |
921 | skb_queue_head_init(&eni_dev->rx_queue); | |
922 | eni_dev->serv_read = eni_in(MID_SERV_WRITE); | |
923 | eni_out(0,MID_DMA_WR_RX); | |
924 | return 0; | |
925 | } | |
926 | ||
927 | ||
928 | /*----------------------------------- TX ------------------------------------*/ | |
929 | ||
930 | ||
931 | enum enq_res { enq_ok,enq_next,enq_jam }; | |
932 | ||
933 | ||
934 | static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, | |
935 | u32 size) | |
936 | { | |
937 | u32 init,words; | |
938 | ||
939 | DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); | |
940 | EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); | |
941 | #if 0 /* don't complain anymore */ | |
942 | if (paddr & 3) | |
943 | printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); | |
944 | if (size & 3) | |
945 | printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); | |
946 | #endif | |
947 | if (paddr & 3) { | |
948 | init = 4-(paddr & 3); | |
949 | if (init > size || size < 7) init = size; | |
950 | DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", | |
951 | (unsigned long) paddr,init,size); | |
952 | dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | | |
953 | (chan << MID_DMA_CHAN_SHIFT); | |
954 | dma[(*j)++] = paddr; | |
955 | paddr += init; | |
956 | size -= init; | |
957 | } | |
958 | words = size >> 2; | |
959 | size &= 3; | |
960 | if (words && (paddr & 31)) { | |
961 | init = 8-((paddr & 31) >> 2); | |
962 | if (init > words) init = words; | |
963 | DPRINTK("put_dma: %lx DMA: %d/%d words\n", | |
964 | (unsigned long) paddr,init,words); | |
965 | dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | | |
966 | (chan << MID_DMA_CHAN_SHIFT); | |
967 | dma[(*j)++] = paddr; | |
968 | paddr += init << 2; | |
969 | words -= init; | |
970 | } | |
971 | #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ | |
972 | if (words & ~15) { | |
973 | DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", | |
974 | (unsigned long) paddr,words >> 4,words); | |
975 | dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) | |
976 | | (chan << MID_DMA_CHAN_SHIFT); | |
977 | dma[(*j)++] = paddr; | |
978 | paddr += (words & ~15) << 2; | |
979 | words &= 15; | |
980 | } | |
981 | #endif | |
982 | #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ | |
983 | if (words & ~7) { | |
984 | DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", | |
985 | (unsigned long) paddr,words >> 3,words); | |
986 | dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) | |
987 | | (chan << MID_DMA_CHAN_SHIFT); | |
988 | dma[(*j)++] = paddr; | |
989 | paddr += (words & ~7) << 2; | |
990 | words &= 7; | |
991 | } | |
992 | #endif | |
993 | #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ | |
994 | if (words & ~3) { | |
995 | DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", | |
996 | (unsigned long) paddr,words >> 2,words); | |
997 | dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) | |
998 | | (chan << MID_DMA_CHAN_SHIFT); | |
999 | dma[(*j)++] = paddr; | |
1000 | paddr += (words & ~3) << 2; | |
1001 | words &= 3; | |
1002 | } | |
1003 | #endif | |
1004 | #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ | |
1005 | if (words & ~1) { | |
1006 | DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", | |
1007 | (unsigned long) paddr,words >> 1,words); | |
1008 | dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) | |
1009 | | (chan << MID_DMA_CHAN_SHIFT); | |
1010 | dma[(*j)++] = paddr; | |
1011 | paddr += (words & ~1) << 2; | |
1012 | words &= 1; | |
1013 | } | |
1014 | #endif | |
1015 | if (words) { | |
1016 | DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, | |
1017 | words); | |
1018 | dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | | |
1019 | (chan << MID_DMA_CHAN_SHIFT); | |
1020 | dma[(*j)++] = paddr; | |
1021 | paddr += words << 2; | |
1022 | } | |
1023 | if (size) { | |
1024 | DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, | |
1025 | size); | |
1026 | dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | | |
1027 | (chan << MID_DMA_CHAN_SHIFT); | |
1028 | dma[(*j)++] = paddr; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | ||
1033 | static enum enq_res do_tx(struct sk_buff *skb) | |
1034 | { | |
1035 | struct atm_vcc *vcc; | |
1036 | struct eni_dev *eni_dev; | |
1037 | struct eni_vcc *eni_vcc; | |
1038 | struct eni_tx *tx; | |
1039 | dma_addr_t paddr; | |
1040 | u32 dma_rd,dma_wr; | |
1041 | u32 size; /* in words */ | |
1042 | int aal5,dma_size,i,j; | |
1043 | ||
1044 | DPRINTK(">do_tx\n"); | |
1045 | NULLCHECK(skb); | |
1046 | EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); | |
1047 | vcc = ATM_SKB(skb)->vcc; | |
1048 | NULLCHECK(vcc); | |
1049 | eni_dev = ENI_DEV(vcc->dev); | |
1050 | NULLCHECK(eni_dev); | |
1051 | eni_vcc = ENI_VCC(vcc); | |
1052 | tx = eni_vcc->tx; | |
1053 | NULLCHECK(tx); | |
1054 | #if 0 /* Enable this for testing with the "align" program */ | |
1055 | { | |
1056 | unsigned int hack = *((char *) skb->data)-'0'; | |
1057 | ||
1058 | if (hack < 8) { | |
1059 | skb->data += hack; | |
1060 | skb->len -= hack; | |
1061 | } | |
1062 | } | |
1063 | #endif | |
1064 | #if 0 /* should work now */ | |
1065 | if ((unsigned long) skb->data & 3) | |
1066 | printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " | |
1067 | "TX data\n",vcc->dev->number,vcc->vci); | |
1068 | #endif | |
1069 | /* | |
1070 | * Potential future IP speedup: make hard_header big enough to put | |
1071 | * segmentation descriptor directly into PDU. Saves: 4 slave writes, | |
1072 | * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) | |
1073 | */ | |
1074 | ||
1075 | aal5 = vcc->qos.aal == ATM_AAL5; | |
1076 | /* check space in buffer */ | |
1077 | if (!aal5) | |
1078 | size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; | |
1079 | /* cell without HEC plus segmentation header (includes | |
1080 | four-byte cell header) */ | |
1081 | else { | |
1082 | size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; | |
1083 | /* add AAL5 trailer */ | |
1084 | size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; | |
1085 | /* add segmentation header */ | |
1086 | } | |
1087 | /* | |
1088 | * Can I move tx_pos by size bytes without getting closer than TX_GAP | |
1089 | * to the read pointer ? TX_GAP means to leave some space for what | |
1090 | * the manual calls "too close". | |
1091 | */ | |
1092 | if (!NEPMOK(tx->tx_pos,size+TX_GAP, | |
1093 | eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { | |
1094 | DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", | |
1095 | vcc->dev->number,size); | |
1096 | return enq_next; | |
1097 | } | |
1098 | /* check DMA */ | |
1099 | dma_wr = eni_in(MID_DMA_WR_TX); | |
1100 | dma_rd = eni_in(MID_DMA_RD_TX); | |
1101 | dma_size = 3; /* JK for descriptor and final fill, plus final size | |
1102 | mis-alignment fix */ | |
1103 | DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); | |
1104 | if (!skb_shinfo(skb)->nr_frags) dma_size += 5; | |
1105 | else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); | |
1106 | if (dma_size > TX_DMA_BUF) { | |
1107 | printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " | |
1108 | "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); | |
1109 | } | |
1110 | DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); | |
1111 | if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < | |
1112 | dma_size) { | |
1113 | printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", | |
1114 | vcc->dev->number); | |
1115 | return enq_jam; | |
1116 | } | |
ede58ef2 C |
1117 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
1118 | DMA_TO_DEVICE); | |
1da177e4 LT |
1119 | ENI_PRV_PADDR(skb) = paddr; |
1120 | /* prepare DMA queue entries */ | |
1121 | j = 0; | |
1122 | eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << | |
1123 | MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | | |
1124 | MID_DT_JK; | |
1125 | j++; | |
1126 | if (!skb_shinfo(skb)->nr_frags) | |
1127 | if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); | |
1128 | else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); | |
1129 | else { | |
1130 | DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ | |
1131 | for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) | |
1132 | if (i == -1) | |
1133 | put_dma(tx->index,eni_dev->dma,&j,(unsigned long) | |
1134 | skb->data, | |
e743d313 | 1135 | skb_headlen(skb)); |
1da177e4 LT |
1136 | else |
1137 | put_dma(tx->index,eni_dev->dma,&j,(unsigned long) | |
c517202f | 1138 | skb_frag_page(&skb_shinfo(skb)->frags[i]) + |
b54c9d5b | 1139 | skb_frag_off(&skb_shinfo(skb)->frags[i]), |
9e903e08 | 1140 | skb_frag_size(&skb_shinfo(skb)->frags[i])); |
1da177e4 | 1141 | } |
126a3fd2 | 1142 | if (skb->len & 3) { |
1143 | put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, | |
1144 | 4 - (skb->len & 3)); | |
1145 | } | |
1da177e4 LT |
1146 | /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ |
1147 | eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << | |
1148 | MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | | |
1149 | MID_DMA_END | MID_DT_JK; | |
1150 | j++; | |
1151 | DPRINTK("DMA at end: %d\n",j); | |
1152 | /* store frame */ | |
1153 | writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | | |
1154 | (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | | |
1155 | (tx->resolution << MID_SEG_RATE_SHIFT) | | |
1156 | (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); | |
1157 | /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ | |
1158 | writel((vcc->vci << MID_SEG_VCI_SHIFT) | | |
1159 | (aal5 ? 0 : (skb->data[3] & 0xf)) | | |
1160 | (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), | |
1161 | tx->send+((tx->tx_pos+1) & (tx->words-1))*4); | |
1162 | DPRINTK("size: %d, len:%d\n",size,skb->len); | |
1163 | if (aal5) | |
1164 | writel(skb->len,tx->send+ | |
1165 | ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); | |
1166 | j = j >> 1; | |
1167 | for (i = 0; i < j; i++) { | |
1168 | writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); | |
1169 | writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); | |
1170 | dma_wr = (dma_wr+1) & (NR_DMA_TX-1); | |
1171 | } | |
1172 | ENI_PRV_POS(skb) = tx->tx_pos; | |
1173 | ENI_PRV_SIZE(skb) = size; | |
1174 | ENI_VCC(vcc)->txing += size; | |
1175 | tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); | |
1176 | DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); | |
1177 | eni_out(dma_wr,MID_DMA_WR_TX); | |
1178 | skb_queue_tail(&eni_dev->tx_queue,skb); | |
59c03699 | 1179 | queued++; |
1da177e4 LT |
1180 | return enq_ok; |
1181 | } | |
1182 | ||
1183 | ||
1184 | static void poll_tx(struct atm_dev *dev) | |
1185 | { | |
1186 | struct eni_tx *tx; | |
1187 | struct sk_buff *skb; | |
1188 | enum enq_res res; | |
1189 | int i; | |
1190 | ||
1191 | DPRINTK(">poll_tx\n"); | |
1192 | for (i = NR_CHAN-1; i >= 0; i--) { | |
1193 | tx = &ENI_DEV(dev)->tx[i]; | |
1194 | if (tx->send) | |
1195 | while ((skb = skb_dequeue(&tx->backlog))) { | |
1196 | res = do_tx(skb); | |
1197 | if (res == enq_ok) continue; | |
1198 | DPRINTK("re-queuing TX PDU\n"); | |
1199 | skb_queue_head(&tx->backlog,skb); | |
59c03699 | 1200 | requeued++; |
1da177e4 LT |
1201 | if (res == enq_jam) return; |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | ||
1208 | static void dequeue_tx(struct atm_dev *dev) | |
1209 | { | |
1210 | struct eni_dev *eni_dev; | |
1211 | struct atm_vcc *vcc; | |
1212 | struct sk_buff *skb; | |
1213 | struct eni_tx *tx; | |
1214 | ||
1215 | NULLCHECK(dev); | |
1216 | eni_dev = ENI_DEV(dev); | |
1217 | NULLCHECK(eni_dev); | |
1218 | while ((skb = skb_dequeue(&eni_dev->tx_queue))) { | |
1219 | vcc = ATM_SKB(skb)->vcc; | |
1220 | NULLCHECK(vcc); | |
1221 | tx = ENI_VCC(vcc)->tx; | |
1222 | NULLCHECK(ENI_VCC(vcc)->tx); | |
1223 | DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), | |
1224 | (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); | |
1225 | if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == | |
1226 | eni_in(MID_TX_DESCRSTART(tx->index))) { | |
1227 | skb_queue_head(&eni_dev->tx_queue,skb); | |
1228 | break; | |
1229 | } | |
1230 | ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); | |
ede58ef2 C |
1231 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
1232 | DMA_TO_DEVICE); | |
1da177e4 LT |
1233 | if (vcc->pop) vcc->pop(vcc,skb); |
1234 | else dev_kfree_skb_irq(skb); | |
1235 | atomic_inc(&vcc->stats->tx); | |
1236 | wake_up(&eni_dev->tx_wait); | |
59c03699 | 1237 | dma_complete++; |
1da177e4 LT |
1238 | } |
1239 | } | |
1240 | ||
1241 | ||
1242 | static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) | |
1243 | { | |
1244 | int i; | |
1245 | ||
1246 | for (i = !ubr; i < NR_CHAN; i++) | |
1247 | if (!eni_dev->tx[i].send) return eni_dev->tx+i; | |
1248 | return NULL; | |
1249 | } | |
1250 | ||
1251 | ||
1252 | static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, | |
1253 | int *res,int unlimited) | |
1254 | { | |
1255 | static const int pre_div[] = { 4,16,128,2048 }; | |
1256 | /* 2^(((x+2)^2-(x+2))/2+1) */ | |
1257 | ||
1258 | if (unlimited) *pre = *res = 0; | |
1259 | else { | |
1260 | if (*pcr > 0) { | |
1261 | int div; | |
1262 | ||
1263 | for (*pre = 0; *pre < 3; (*pre)++) | |
1264 | if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; | |
1265 | div = pre_div[*pre]**pcr; | |
1266 | DPRINTK("min div %d\n",div); | |
1267 | *res = TS_CLOCK/div-1; | |
1268 | } | |
1269 | else { | |
1270 | int div; | |
1271 | ||
1272 | if (!*pcr) *pcr = eni_dev->tx_bw+reserved; | |
1273 | for (*pre = 3; *pre >= 0; (*pre)--) | |
1274 | if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; | |
1275 | if (*pre < 3) (*pre)++; /* else fail later */ | |
1276 | div = pre_div[*pre]*-*pcr; | |
1277 | DPRINTK("max div %d\n",div); | |
6a19309d | 1278 | *res = DIV_ROUND_UP(TS_CLOCK, div)-1; |
1da177e4 LT |
1279 | } |
1280 | if (*res < 0) *res = 0; | |
1281 | if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; | |
1282 | } | |
1283 | *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); | |
1284 | DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); | |
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | ||
1289 | static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, | |
1290 | int set_rsv,int set_shp) | |
1291 | { | |
1292 | struct eni_dev *eni_dev = ENI_DEV(vcc->dev); | |
1293 | struct eni_vcc *eni_vcc = ENI_VCC(vcc); | |
1294 | struct eni_tx *tx; | |
1295 | unsigned long size; | |
1296 | void __iomem *mem; | |
1297 | int rate,ubr,unlimited,new_tx; | |
1298 | int pre,res,order; | |
1299 | int error; | |
1300 | ||
1301 | rate = atm_pcr_goal(txtp); | |
1302 | ubr = txtp->traffic_class == ATM_UBR; | |
1303 | unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || | |
1304 | rate >= ATM_OC3_PCR); | |
1305 | if (!unlimited) { | |
1306 | size = txtp->max_sdu*eni_dev->tx_mult/100; | |
1307 | if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= | |
1308 | MID_MAX_BUF_SIZE) | |
1309 | size = MID_MAX_BUF_SIZE; | |
1310 | } | |
1311 | else { | |
1312 | if (eni_dev->ubr) { | |
1313 | eni_vcc->tx = eni_dev->ubr; | |
1314 | txtp->pcr = ATM_OC3_PCR; | |
1315 | return 0; | |
1316 | } | |
1317 | size = UBR_BUFFER; | |
1318 | } | |
1319 | new_tx = !eni_vcc->tx; | |
1320 | mem = NULL; /* for gcc */ | |
1321 | if (!new_tx) tx = eni_vcc->tx; | |
1322 | else { | |
1323 | mem = eni_alloc_mem(eni_dev,&size); | |
1324 | if (!mem) return -ENOBUFS; | |
1325 | tx = alloc_tx(eni_dev,unlimited); | |
1326 | if (!tx) { | |
1327 | eni_free_mem(eni_dev,mem,size); | |
1328 | return -EBUSY; | |
1329 | } | |
1330 | DPRINTK("got chan %d\n",tx->index); | |
1331 | tx->reserved = tx->shaping = 0; | |
1332 | tx->send = mem; | |
1333 | tx->words = size >> 2; | |
1334 | skb_queue_head_init(&tx->backlog); | |
1335 | for (order = 0; size > (1 << (order+10)); order++); | |
1336 | eni_out((order << MID_SIZE_SHIFT) | | |
1337 | ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), | |
1338 | MID_TX_PLACE(tx->index)); | |
1339 | tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & | |
1340 | MID_DESCR_START; | |
1341 | } | |
1342 | error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); | |
1343 | if (!error && txtp->min_pcr > rate) error = -EINVAL; | |
1344 | if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && | |
1345 | txtp->max_pcr < rate) error = -EINVAL; | |
1346 | if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) | |
1347 | error = -EINVAL; | |
1348 | if (!error && set_rsv && !set_shp && rate < tx->shaping) | |
1349 | error = -EINVAL; | |
1350 | if (!error && !set_rsv && rate > tx->reserved && !ubr) | |
1351 | error = -EINVAL; | |
1352 | if (error) { | |
1353 | if (new_tx) { | |
1354 | tx->send = NULL; | |
1355 | eni_free_mem(eni_dev,mem,size); | |
1356 | } | |
1357 | return error; | |
1358 | } | |
1359 | txtp->pcr = rate; | |
1360 | if (set_rsv && !ubr) { | |
1361 | eni_dev->tx_bw += tx->reserved; | |
1362 | tx->reserved = rate; | |
1363 | eni_dev->tx_bw -= rate; | |
1364 | } | |
1365 | if (set_shp || (unlimited && new_tx)) { | |
1366 | if (unlimited && new_tx) eni_dev->ubr = tx; | |
1367 | tx->prescaler = pre; | |
1368 | tx->resolution = res; | |
1369 | tx->shaping = rate; | |
1370 | } | |
1371 | if (set_shp) eni_vcc->tx = tx; | |
1372 | DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | ||
1377 | static int open_tx_first(struct atm_vcc *vcc) | |
1378 | { | |
1379 | ENI_VCC(vcc)->tx = NULL; | |
1380 | if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; | |
1381 | ENI_VCC(vcc)->txing = 0; | |
1382 | return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); | |
1383 | } | |
1384 | ||
1385 | ||
1386 | static int open_tx_second(struct atm_vcc *vcc) | |
1387 | { | |
1388 | return 0; /* nothing to do */ | |
1389 | } | |
1390 | ||
1391 | ||
1392 | static void close_tx(struct atm_vcc *vcc) | |
1393 | { | |
1394 | DECLARE_WAITQUEUE(wait,current); | |
1395 | struct eni_dev *eni_dev; | |
1396 | struct eni_vcc *eni_vcc; | |
1397 | ||
1398 | eni_vcc = ENI_VCC(vcc); | |
1399 | if (!eni_vcc->tx) return; | |
1400 | eni_dev = ENI_DEV(vcc->dev); | |
1401 | /* wait for TX queue to drain */ | |
1402 | DPRINTK("eni_close: waiting for TX ...\n"); | |
1403 | add_wait_queue(&eni_dev->tx_wait,&wait); | |
1404 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1405 | for (;;) { | |
1406 | int txing; | |
1407 | ||
1408 | tasklet_disable(&eni_dev->task); | |
1409 | txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; | |
1410 | tasklet_enable(&eni_dev->task); | |
1411 | if (!txing) break; | |
1412 | DPRINTK("%d TX left\n",eni_vcc->txing); | |
1413 | schedule(); | |
1414 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1415 | } | |
1416 | set_current_state(TASK_RUNNING); | |
1417 | remove_wait_queue(&eni_dev->tx_wait,&wait); | |
1418 | if (eni_vcc->tx != eni_dev->ubr) { | |
1419 | /* | |
1420 | * Looping a few times in here is probably far cheaper than | |
1421 | * keeping track of TX completions all the time, so let's poll | |
1422 | * a bit ... | |
1423 | */ | |
1424 | while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != | |
1425 | eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) | |
1426 | schedule(); | |
1427 | eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); | |
1428 | eni_vcc->tx->send = NULL; | |
1429 | eni_dev->tx_bw += eni_vcc->tx->reserved; | |
1430 | } | |
1431 | eni_vcc->tx = NULL; | |
1432 | } | |
1433 | ||
1434 | ||
1435 | static int start_tx(struct atm_dev *dev) | |
1436 | { | |
1437 | struct eni_dev *eni_dev; | |
1438 | int i; | |
1439 | ||
1440 | eni_dev = ENI_DEV(dev); | |
1441 | eni_dev->lost = 0; | |
1442 | eni_dev->tx_bw = ATM_OC3_PCR; | |
1443 | eni_dev->tx_mult = DEFAULT_TX_MULT; | |
1444 | init_waitqueue_head(&eni_dev->tx_wait); | |
1445 | eni_dev->ubr = NULL; | |
1446 | skb_queue_head_init(&eni_dev->tx_queue); | |
1447 | eni_out(0,MID_DMA_WR_TX); | |
1448 | for (i = 0; i < NR_CHAN; i++) { | |
1449 | eni_dev->tx[i].send = NULL; | |
1450 | eni_dev->tx[i].index = i; | |
1451 | } | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | ||
1456 | /*--------------------------------- common ----------------------------------*/ | |
1457 | ||
1458 | ||
1459 | #if 0 /* may become useful again when tuning things */ | |
1460 | ||
1461 | static void foo(void) | |
1462 | { | |
1463 | printk(KERN_INFO | |
1464 | "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" | |
1465 | "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", | |
1466 | tx_complete,dma_complete,queued,requeued,submitted,backlogged, | |
1467 | rx_enqueued,rx_dequeued,putting,pushed); | |
1468 | if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); | |
1469 | } | |
1470 | ||
1471 | #endif | |
1472 | ||
1473 | ||
1474 | static void bug_int(struct atm_dev *dev,unsigned long reason) | |
1475 | { | |
1da177e4 | 1476 | DPRINTK(">bug_int\n"); |
1da177e4 LT |
1477 | if (reason & MID_DMA_ERR_ACK) |
1478 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " | |
1479 | "error\n",dev->number); | |
1480 | if (reason & MID_TX_IDENT_MISM) | |
1481 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " | |
1482 | "mismatch\n",dev->number); | |
1483 | if (reason & MID_TX_DMA_OVFL) | |
1484 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " | |
1485 | "overflow\n",dev->number); | |
1486 | EVENT("---dump ends here---\n",0,0); | |
1487 | printk(KERN_NOTICE "---recent events---\n"); | |
1488 | event_dump(); | |
1489 | } | |
1490 | ||
1491 | ||
7d12e780 | 1492 | static irqreturn_t eni_int(int irq,void *dev_id) |
1da177e4 LT |
1493 | { |
1494 | struct atm_dev *dev; | |
1495 | struct eni_dev *eni_dev; | |
1496 | u32 reason; | |
1497 | ||
1498 | DPRINTK(">eni_int\n"); | |
1499 | dev = dev_id; | |
1500 | eni_dev = ENI_DEV(dev); | |
1501 | reason = eni_in(MID_ISA); | |
1502 | DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); | |
1503 | /* | |
1504 | * Must handle these two right now, because reading ISA doesn't clear | |
1505 | * them, so they re-occur and we never make it to the tasklet. Since | |
1506 | * they're rare, we don't mind the occasional invocation of eni_tasklet | |
1507 | * with eni_dev->events == 0. | |
1508 | */ | |
1509 | if (reason & MID_STAT_OVFL) { | |
1510 | EVENT("stat overflow\n",0,0); | |
1511 | eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; | |
1512 | } | |
1513 | if (reason & MID_SUNI_INT) { | |
1514 | EVENT("SUNI int\n",0,0); | |
1515 | dev->phy->interrupt(dev); | |
1516 | #if 0 | |
1517 | foo(); | |
1518 | #endif | |
1519 | } | |
1520 | spin_lock(&eni_dev->lock); | |
1521 | eni_dev->events |= reason; | |
1522 | spin_unlock(&eni_dev->lock); | |
1523 | tasklet_schedule(&eni_dev->task); | |
1524 | return IRQ_HANDLED; | |
1525 | } | |
1526 | ||
1527 | ||
1528 | static void eni_tasklet(unsigned long data) | |
1529 | { | |
1530 | struct atm_dev *dev = (struct atm_dev *) data; | |
1531 | struct eni_dev *eni_dev = ENI_DEV(dev); | |
1532 | unsigned long flags; | |
1533 | u32 events; | |
1534 | ||
1535 | DPRINTK("eni_tasklet (dev %p)\n",dev); | |
1536 | spin_lock_irqsave(&eni_dev->lock,flags); | |
1537 | events = xchg(&eni_dev->events,0); | |
1538 | spin_unlock_irqrestore(&eni_dev->lock,flags); | |
1539 | if (events & MID_RX_DMA_COMPLETE) { | |
1540 | EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); | |
1541 | dequeue_rx(dev); | |
1542 | EVENT("dequeue_rx done, starting poll_rx\n",0,0); | |
1543 | poll_rx(dev); | |
1544 | EVENT("poll_rx done\n",0,0); | |
1545 | /* poll_tx ? */ | |
1546 | } | |
1547 | if (events & MID_SERVICE) { | |
1548 | EVENT("INT: service, starting get_service\n",0,0); | |
1549 | get_service(dev); | |
1550 | EVENT("get_service done, starting poll_rx\n",0,0); | |
1551 | poll_rx(dev); | |
1552 | EVENT("poll_rx done\n",0,0); | |
1553 | } | |
1554 | if (events & MID_TX_DMA_COMPLETE) { | |
1555 | EVENT("INT: TX DMA COMPLETE\n",0,0); | |
1556 | dequeue_tx(dev); | |
1557 | } | |
1558 | if (events & MID_TX_COMPLETE) { | |
1559 | EVENT("INT: TX COMPLETE\n",0,0); | |
59c03699 | 1560 | tx_complete++; |
1da177e4 LT |
1561 | wake_up(&eni_dev->tx_wait); |
1562 | /* poll_rx ? */ | |
1563 | } | |
1564 | if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { | |
1565 | EVENT("bug interrupt\n",0,0); | |
1566 | bug_int(dev,events); | |
1567 | } | |
1568 | poll_tx(dev); | |
1569 | } | |
1570 | ||
1571 | ||
1572 | /*--------------------------------- entries ---------------------------------*/ | |
1573 | ||
1574 | ||
6c44512d | 1575 | static char * const media_name[] = { |
1da177e4 LT |
1576 | "MMF", "SMF", "MMF", "03?", /* 0- 3 */ |
1577 | "UTP", "05?", "06?", "07?", /* 4- 7 */ | |
1578 | "TAXI","09?", "10?", "11?", /* 8-11 */ | |
1579 | "12?", "13?", "14?", "15?", /* 12-15 */ | |
1580 | "MMF", "SMF", "18?", "19?", /* 16-19 */ | |
1581 | "UTP", "21?", "22?", "23?", /* 20-23 */ | |
1582 | "24?", "25?", "26?", "27?", /* 24-27 */ | |
1583 | "28?", "29?", "30?", "31?" /* 28-31 */ | |
1584 | }; | |
1585 | ||
1586 | ||
1587 | #define SET_SEPROM \ | |
1588 | ({ if (!error && !pci_error) { \ | |
1589 | pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ | |
1590 | udelay(10); /* 10 usecs */ \ | |
1591 | } }) | |
1592 | #define GET_SEPROM \ | |
1593 | ({ if (!error && !pci_error) { \ | |
1594 | pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ | |
1595 | udelay(10); /* 10 usecs */ \ | |
1596 | } }) | |
1597 | ||
1598 | ||
6c44512d | 1599 | static int get_esi_asic(struct atm_dev *dev) |
1da177e4 LT |
1600 | { |
1601 | struct eni_dev *eni_dev; | |
1602 | unsigned char tonga; | |
1603 | int error,failed,pci_error; | |
1604 | int address,i,j; | |
1605 | ||
1606 | eni_dev = ENI_DEV(dev); | |
1607 | error = pci_error = 0; | |
1608 | tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; | |
1609 | SET_SEPROM; | |
1610 | for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { | |
1611 | /* start operation */ | |
1612 | tonga |= SEPROM_DATA; | |
1613 | SET_SEPROM; | |
1614 | tonga |= SEPROM_CLK; | |
1615 | SET_SEPROM; | |
1616 | tonga &= ~SEPROM_DATA; | |
1617 | SET_SEPROM; | |
1618 | tonga &= ~SEPROM_CLK; | |
1619 | SET_SEPROM; | |
1620 | /* send address */ | |
1621 | address = ((i+SEPROM_ESI_BASE) << 1)+1; | |
1622 | for (j = 7; j >= 0; j--) { | |
1623 | tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : | |
1624 | tonga & ~SEPROM_DATA; | |
1625 | SET_SEPROM; | |
1626 | tonga |= SEPROM_CLK; | |
1627 | SET_SEPROM; | |
1628 | tonga &= ~SEPROM_CLK; | |
1629 | SET_SEPROM; | |
1630 | } | |
1631 | /* get ack */ | |
1632 | tonga |= SEPROM_DATA; | |
1633 | SET_SEPROM; | |
1634 | tonga |= SEPROM_CLK; | |
1635 | SET_SEPROM; | |
1636 | GET_SEPROM; | |
1637 | failed = tonga & SEPROM_DATA; | |
1638 | tonga &= ~SEPROM_CLK; | |
1639 | SET_SEPROM; | |
1640 | tonga |= SEPROM_DATA; | |
1641 | SET_SEPROM; | |
1642 | if (failed) error = -EIO; | |
1643 | else { | |
1644 | dev->esi[i] = 0; | |
1645 | for (j = 7; j >= 0; j--) { | |
1646 | dev->esi[i] <<= 1; | |
1647 | tonga |= SEPROM_DATA; | |
1648 | SET_SEPROM; | |
1649 | tonga |= SEPROM_CLK; | |
1650 | SET_SEPROM; | |
1651 | GET_SEPROM; | |
1652 | if (tonga & SEPROM_DATA) dev->esi[i] |= 1; | |
1653 | tonga &= ~SEPROM_CLK; | |
1654 | SET_SEPROM; | |
1655 | tonga |= SEPROM_DATA; | |
1656 | SET_SEPROM; | |
1657 | } | |
1658 | /* get ack */ | |
1659 | tonga |= SEPROM_DATA; | |
1660 | SET_SEPROM; | |
1661 | tonga |= SEPROM_CLK; | |
1662 | SET_SEPROM; | |
1663 | GET_SEPROM; | |
1664 | if (!(tonga & SEPROM_DATA)) error = -EIO; | |
1665 | tonga &= ~SEPROM_CLK; | |
1666 | SET_SEPROM; | |
1667 | tonga |= SEPROM_DATA; | |
1668 | SET_SEPROM; | |
1669 | } | |
1670 | /* stop operation */ | |
1671 | tonga &= ~SEPROM_DATA; | |
1672 | SET_SEPROM; | |
1673 | tonga |= SEPROM_CLK; | |
1674 | SET_SEPROM; | |
1675 | tonga |= SEPROM_DATA; | |
1676 | SET_SEPROM; | |
1677 | } | |
1678 | if (pci_error) { | |
1679 | printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " | |
1680 | "(0x%02x)\n",dev->number,pci_error); | |
1681 | error = -EIO; | |
1682 | } | |
1683 | return error; | |
1684 | } | |
1685 | ||
1686 | ||
1687 | #undef SET_SEPROM | |
1688 | #undef GET_SEPROM | |
1689 | ||
1690 | ||
6c44512d | 1691 | static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) |
1da177e4 LT |
1692 | { |
1693 | void __iomem *mac_base; | |
1694 | int i; | |
1695 | ||
1696 | mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); | |
1697 | for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); | |
1698 | return 0; | |
1699 | } | |
1700 | ||
1701 | ||
6c44512d | 1702 | static int eni_do_init(struct atm_dev *dev) |
1da177e4 LT |
1703 | { |
1704 | struct midway_eprom __iomem *eprom; | |
1705 | struct eni_dev *eni_dev; | |
1706 | struct pci_dev *pci_dev; | |
1707 | unsigned long real_base; | |
1708 | void __iomem *base; | |
1da177e4 LT |
1709 | int error,i,last; |
1710 | ||
1711 | DPRINTK(">eni_init\n"); | |
1712 | dev->ci_range.vpi_bits = 0; | |
1713 | dev->ci_range.vci_bits = NR_VCI_LD; | |
1714 | dev->link_rate = ATM_OC3_PCR; | |
1715 | eni_dev = ENI_DEV(dev); | |
1716 | pci_dev = eni_dev->pci_dev; | |
1717 | real_base = pci_resource_start(pci_dev, 0); | |
1718 | eni_dev->irq = pci_dev->irq; | |
1da177e4 LT |
1719 | if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, |
1720 | PCI_COMMAND_MEMORY | | |
1721 | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { | |
1722 | printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " | |
1723 | "(0x%02x)\n",dev->number,error); | |
1724 | return -EIO; | |
1725 | } | |
1726 | printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", | |
44c10138 | 1727 | dev->number,pci_dev->revision,real_base,eni_dev->irq); |
1da177e4 LT |
1728 | if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { |
1729 | printk("\n"); | |
1730 | printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " | |
1731 | "mapping\n",dev->number); | |
7cf61566 | 1732 | return -ENOMEM; |
1da177e4 | 1733 | } |
126a3fd2 | 1734 | eni_dev->ioaddr = base; |
1da177e4 LT |
1735 | eni_dev->base_diff = real_base - (unsigned long) base; |
1736 | /* id may not be present in ASIC Tonga boards - check this @@@ */ | |
1737 | if (!eni_dev->asic) { | |
1738 | eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); | |
1739 | if (readl(&eprom->magic) != ENI155_MAGIC) { | |
1740 | printk("\n"); | |
1941bf8c JP |
1741 | printk(KERN_ERR DEV_LABEL |
1742 | "(itf %d): bad magic - expected 0x%x, got 0x%x\n", | |
1743 | dev->number, ENI155_MAGIC, | |
1744 | (unsigned)readl(&eprom->magic)); | |
78e4be16 AL |
1745 | error = -EINVAL; |
1746 | goto unmap; | |
1da177e4 LT |
1747 | } |
1748 | } | |
1749 | eni_dev->phy = base+PHY_BASE; | |
1750 | eni_dev->reg = base+REG_BASE; | |
1751 | eni_dev->ram = base+RAM_BASE; | |
1752 | last = MAP_MAX_SIZE-RAM_BASE; | |
1753 | for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { | |
1754 | writel(0x55555555,eni_dev->ram+i); | |
1755 | if (readl(eni_dev->ram+i) != 0x55555555) last = i; | |
1756 | else { | |
1757 | writel(0xAAAAAAAA,eni_dev->ram+i); | |
1758 | if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; | |
1759 | else writel(i,eni_dev->ram+i); | |
1760 | } | |
1761 | } | |
1762 | for (i = 0; i < last; i += RAM_INCREMENT) | |
1763 | if (readl(eni_dev->ram+i) != i) break; | |
1764 | eni_dev->mem = i; | |
1765 | memset_io(eni_dev->ram,0,eni_dev->mem); | |
1766 | /* TODO: should shrink allocation now */ | |
1767 | printk("mem=%dkB (",eni_dev->mem >> 10); | |
1768 | /* TODO: check for non-SUNI, check for TAXI ? */ | |
1769 | if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { | |
1770 | printk(")\n"); | |
1771 | printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", | |
1772 | dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); | |
78e4be16 AL |
1773 | error = -EINVAL; |
1774 | goto unmap; | |
1da177e4 LT |
1775 | } |
1776 | error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); | |
78e4be16 AL |
1777 | if (error) |
1778 | goto unmap; | |
1da177e4 LT |
1779 | for (i = 0; i < ESI_LEN; i++) |
1780 | printk("%s%02X",i ? "-" : "",dev->esi[i]); | |
1781 | printk(")\n"); | |
1782 | printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, | |
1783 | eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", | |
ae7cd93e | 1784 | media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); |
78e4be16 AL |
1785 | |
1786 | error = suni_init(dev); | |
1787 | if (error) | |
1788 | goto unmap; | |
1789 | out: | |
1790 | return error; | |
1791 | unmap: | |
1792 | iounmap(base); | |
1793 | goto out; | |
1da177e4 LT |
1794 | } |
1795 | ||
126a3fd2 | 1796 | static void eni_do_release(struct atm_dev *dev) |
1797 | { | |
1798 | struct eni_dev *ed = ENI_DEV(dev); | |
1799 | ||
1800 | dev->phy->stop(dev); | |
1801 | dev->phy = NULL; | |
1802 | iounmap(ed->ioaddr); | |
1803 | } | |
1da177e4 | 1804 | |
6c44512d | 1805 | static int eni_start(struct atm_dev *dev) |
1da177e4 LT |
1806 | { |
1807 | struct eni_dev *eni_dev; | |
1808 | ||
1809 | void __iomem *buf; | |
1810 | unsigned long buffer_mem; | |
1811 | int error; | |
1812 | ||
1813 | DPRINTK(">eni_start\n"); | |
1814 | eni_dev = ENI_DEV(dev); | |
dace1453 | 1815 | if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { |
1da177e4 LT |
1816 | printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", |
1817 | dev->number,eni_dev->irq); | |
758d11bf AM |
1818 | error = -EAGAIN; |
1819 | goto out; | |
1da177e4 | 1820 | } |
1da177e4 LT |
1821 | pci_set_master(eni_dev->pci_dev); |
1822 | if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, | |
1823 | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | | |
1824 | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { | |
1825 | printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" | |
1826 | "master (0x%02x)\n",dev->number,error); | |
758d11bf | 1827 | goto free_irq; |
1da177e4 LT |
1828 | } |
1829 | if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, | |
1830 | END_SWAP_DMA))) { | |
1831 | printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " | |
1832 | "(0x%02x)\n",dev->number,error); | |
758d11bf | 1833 | goto free_irq; |
1da177e4 LT |
1834 | } |
1835 | /* determine addresses of internal tables */ | |
1836 | eni_dev->vci = eni_dev->ram; | |
1837 | eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; | |
1838 | eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; | |
1839 | eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; | |
1840 | buf = eni_dev->service+NR_SERVICE*4; | |
1841 | DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", | |
1842 | eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, | |
1843 | eni_dev->service,buf); | |
1844 | spin_lock_init(&eni_dev->lock); | |
1845 | tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); | |
1846 | eni_dev->events = 0; | |
1847 | /* initialize memory management */ | |
1848 | buffer_mem = eni_dev->mem - (buf - eni_dev->ram); | |
1849 | eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; | |
d9e6620c ME |
1850 | eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, |
1851 | sizeof(*eni_dev->free_list), | |
1852 | GFP_KERNEL); | |
1da177e4 LT |
1853 | if (!eni_dev->free_list) { |
1854 | printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", | |
1855 | dev->number); | |
758d11bf AM |
1856 | error = -ENOMEM; |
1857 | goto free_irq; | |
1da177e4 LT |
1858 | } |
1859 | eni_dev->free_len = 0; | |
1860 | eni_put_free(eni_dev,buf,buffer_mem); | |
1861 | memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ | |
1862 | /* | |
1863 | * byte_addr free (k) | |
1864 | * 0x00000000 512 VCI table | |
1865 | * 0x00004000 496 RX DMA | |
1866 | * 0x00005000 492 TX DMA | |
1867 | * 0x00006000 488 service list | |
1868 | * 0x00007000 484 buffers | |
1869 | * 0x00080000 0 end (512kB) | |
1870 | */ | |
1871 | eni_out(0xffffffff,MID_IE); | |
1872 | error = start_tx(dev); | |
758d11bf | 1873 | if (error) goto free_list; |
1da177e4 | 1874 | error = start_rx(dev); |
758d11bf | 1875 | if (error) goto free_list; |
1da177e4 | 1876 | error = dev->phy->start(dev); |
758d11bf | 1877 | if (error) goto free_list; |
1da177e4 LT |
1878 | eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | |
1879 | MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, | |
1880 | MID_MC_S); | |
1881 | /* Tonga uses SBus INTReq1 */ | |
1882 | (void) eni_in(MID_ISA); /* clear Midway interrupts */ | |
1883 | return 0; | |
758d11bf AM |
1884 | |
1885 | free_list: | |
1886 | kfree(eni_dev->free_list); | |
1887 | ||
1888 | free_irq: | |
5eac5f6d | 1889 | free_irq(eni_dev->irq, dev); |
758d11bf AM |
1890 | |
1891 | out: | |
1892 | return error; | |
1da177e4 LT |
1893 | } |
1894 | ||
1895 | ||
1896 | static void eni_close(struct atm_vcc *vcc) | |
1897 | { | |
1898 | DPRINTK(">eni_close\n"); | |
1899 | if (!ENI_VCC(vcc)) return; | |
1900 | clear_bit(ATM_VF_READY,&vcc->flags); | |
1901 | close_rx(vcc); | |
1902 | close_tx(vcc); | |
1903 | DPRINTK("eni_close: done waiting\n"); | |
1904 | /* deallocate memory */ | |
1905 | kfree(ENI_VCC(vcc)); | |
1906 | vcc->dev_data = NULL; | |
1907 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1908 | /*foo();*/ | |
1909 | } | |
1910 | ||
1911 | ||
1912 | static int eni_open(struct atm_vcc *vcc) | |
1913 | { | |
1da177e4 LT |
1914 | struct eni_vcc *eni_vcc; |
1915 | int error; | |
1916 | short vpi = vcc->vpi; | |
1917 | int vci = vcc->vci; | |
1918 | ||
1919 | DPRINTK(">eni_open\n"); | |
1920 | EVENT("eni_open\n",0,0); | |
1921 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) | |
1922 | vcc->dev_data = NULL; | |
1da177e4 LT |
1923 | if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) |
1924 | set_bit(ATM_VF_ADDR,&vcc->flags); | |
1925 | if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) | |
1926 | return -EINVAL; | |
1927 | DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, | |
1928 | vcc->vci); | |
1929 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { | |
1930 | eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); | |
1931 | if (!eni_vcc) return -ENOMEM; | |
1932 | vcc->dev_data = eni_vcc; | |
1933 | eni_vcc->tx = NULL; /* for eni_close after open_rx */ | |
1934 | if ((error = open_rx_first(vcc))) { | |
1935 | eni_close(vcc); | |
1936 | return error; | |
1937 | } | |
1938 | if ((error = open_tx_first(vcc))) { | |
1939 | eni_close(vcc); | |
1940 | return error; | |
1941 | } | |
1942 | } | |
1943 | if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; | |
1944 | if ((error = open_rx_second(vcc))) { | |
1945 | eni_close(vcc); | |
1946 | return error; | |
1947 | } | |
1948 | if ((error = open_tx_second(vcc))) { | |
1949 | eni_close(vcc); | |
1950 | return error; | |
1951 | } | |
1952 | set_bit(ATM_VF_READY,&vcc->flags); | |
1953 | /* should power down SUNI while !ref_count @@@ */ | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | ||
1958 | static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) | |
1959 | { | |
1960 | struct eni_dev *eni_dev = ENI_DEV(vcc->dev); | |
1961 | struct eni_tx *tx = ENI_VCC(vcc)->tx; | |
1962 | struct sk_buff *skb; | |
1963 | int error,rate,rsv,shp; | |
1964 | ||
1965 | if (qos->txtp.traffic_class == ATM_NONE) return 0; | |
1966 | if (tx == eni_dev->ubr) return -EBADFD; | |
1967 | rate = atm_pcr_goal(&qos->txtp); | |
1968 | if (rate < 0) rate = -rate; | |
1969 | rsv = shp = 0; | |
1970 | if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; | |
1971 | if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; | |
1972 | if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; | |
1973 | if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; | |
1974 | if (!rsv && !shp) return 0; | |
1975 | error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); | |
1976 | if (error) return error; | |
1977 | if (shp && !(flgs & ATM_MF_IMMED)) return 0; | |
1978 | /* | |
1979 | * Walk through the send buffer and patch the rate information in all | |
1980 | * segmentation buffer descriptors of this VCC. | |
1981 | */ | |
1982 | tasklet_disable(&eni_dev->task); | |
1983 | skb_queue_walk(&eni_dev->tx_queue, skb) { | |
1984 | void __iomem *dsc; | |
1985 | ||
1986 | if (ATM_SKB(skb)->vcc != vcc) continue; | |
1987 | dsc = tx->send+ENI_PRV_POS(skb)*4; | |
1988 | writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | | |
1989 | (tx->prescaler << MID_SEG_PR_SHIFT) | | |
1990 | (tx->resolution << MID_SEG_RATE_SHIFT), dsc); | |
1991 | } | |
1992 | tasklet_enable(&eni_dev->task); | |
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | ||
1997 | static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) | |
1998 | { | |
1999 | struct eni_dev *eni_dev = ENI_DEV(dev); | |
2000 | ||
2001 | if (cmd == ENI_MEMDUMP) { | |
2002 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
2003 | printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " | |
2004 | "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); | |
2005 | dump(dev); | |
2006 | return 0; | |
2007 | } | |
2008 | if (cmd == ENI_SETMULT) { | |
2009 | struct eni_multipliers mult; | |
2010 | ||
2011 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
2012 | if (copy_from_user(&mult, arg, | |
2013 | sizeof(struct eni_multipliers))) | |
2014 | return -EFAULT; | |
2015 | if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || | |
2016 | mult.tx > 65536 || mult.rx > 65536) | |
2017 | return -EINVAL; | |
2018 | if (mult.tx) eni_dev->tx_mult = mult.tx; | |
2019 | if (mult.rx) eni_dev->rx_mult = mult.rx; | |
2020 | return 0; | |
2021 | } | |
2022 | if (cmd == ATM_SETCIRANGE) { | |
2023 | struct atm_cirange ci; | |
2024 | ||
2025 | if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) | |
2026 | return -EFAULT; | |
2027 | if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && | |
2028 | (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) | |
2029 | return 0; | |
2030 | return -EINVAL; | |
2031 | } | |
2032 | if (!dev->phy->ioctl) return -ENOIOCTLCMD; | |
2033 | return dev->phy->ioctl(dev,cmd,arg); | |
2034 | } | |
2035 | ||
2036 | ||
2037 | static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, | |
2038 | void __user *optval,int optlen) | |
2039 | { | |
2040 | return -EINVAL; | |
2041 | } | |
2042 | ||
2043 | ||
2044 | static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, | |
b7058842 | 2045 | void __user *optval,unsigned int optlen) |
1da177e4 LT |
2046 | { |
2047 | return -EINVAL; | |
2048 | } | |
2049 | ||
2050 | ||
2051 | static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) | |
2052 | { | |
2053 | enum enq_res res; | |
2054 | ||
2055 | DPRINTK(">eni_send\n"); | |
2056 | if (!ENI_VCC(vcc)->tx) { | |
2057 | if (vcc->pop) vcc->pop(vcc,skb); | |
2058 | else dev_kfree_skb(skb); | |
2059 | return -EINVAL; | |
2060 | } | |
2061 | if (!skb) { | |
2062 | printk(KERN_CRIT "!skb in eni_send ?\n"); | |
2063 | if (vcc->pop) vcc->pop(vcc,skb); | |
2064 | return -EINVAL; | |
2065 | } | |
2066 | if (vcc->qos.aal == ATM_AAL0) { | |
2067 | if (skb->len != ATM_CELL_SIZE-1) { | |
2068 | if (vcc->pop) vcc->pop(vcc,skb); | |
2069 | else dev_kfree_skb(skb); | |
2070 | return -EINVAL; | |
2071 | } | |
2072 | *(u32 *) skb->data = htonl(*(u32 *) skb->data); | |
2073 | } | |
59c03699 | 2074 | submitted++; |
1da177e4 LT |
2075 | ATM_SKB(skb)->vcc = vcc; |
2076 | tasklet_disable(&ENI_DEV(vcc->dev)->task); | |
2077 | res = do_tx(skb); | |
2078 | tasklet_enable(&ENI_DEV(vcc->dev)->task); | |
2079 | if (res == enq_ok) return 0; | |
2080 | skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); | |
59c03699 | 2081 | backlogged++; |
1da177e4 LT |
2082 | tasklet_schedule(&ENI_DEV(vcc->dev)->task); |
2083 | return 0; | |
2084 | } | |
2085 | ||
2086 | static void eni_phy_put(struct atm_dev *dev,unsigned char value, | |
2087 | unsigned long addr) | |
2088 | { | |
2089 | writel(value,ENI_DEV(dev)->phy+addr*4); | |
2090 | } | |
2091 | ||
2092 | ||
2093 | ||
2094 | static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) | |
2095 | { | |
2096 | return readl(ENI_DEV(dev)->phy+addr*4); | |
2097 | } | |
2098 | ||
2099 | ||
2100 | static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) | |
2101 | { | |
1da177e4 LT |
2102 | struct sock *s; |
2103 | static const char *signal[] = { "LOST","unknown","okay" }; | |
2104 | struct eni_dev *eni_dev = ENI_DEV(dev); | |
2105 | struct atm_vcc *vcc; | |
2106 | int left,i; | |
2107 | ||
2108 | left = *pos; | |
2109 | if (!left) | |
2110 | return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " | |
2111 | "%d cps remaining\n",dev->number,signal[(int) dev->signal], | |
2112 | eni_dev->mem >> 10,eni_dev->tx_bw); | |
2113 | if (!--left) | |
2114 | return sprintf(page,"%4sBursts: TX" | |
2115 | #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ | |
2116 | !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ | |
2117 | !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ | |
2118 | !defined(CONFIG_ATM_ENI_BURST_TX_2W) | |
2119 | " none" | |
2120 | #endif | |
2121 | #ifdef CONFIG_ATM_ENI_BURST_TX_16W | |
2122 | " 16W" | |
2123 | #endif | |
2124 | #ifdef CONFIG_ATM_ENI_BURST_TX_8W | |
2125 | " 8W" | |
2126 | #endif | |
2127 | #ifdef CONFIG_ATM_ENI_BURST_TX_4W | |
2128 | " 4W" | |
2129 | #endif | |
2130 | #ifdef CONFIG_ATM_ENI_BURST_TX_2W | |
2131 | " 2W" | |
2132 | #endif | |
2133 | ", RX" | |
2134 | #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ | |
2135 | !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ | |
2136 | !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ | |
2137 | !defined(CONFIG_ATM_ENI_BURST_RX_2W) | |
2138 | " none" | |
2139 | #endif | |
2140 | #ifdef CONFIG_ATM_ENI_BURST_RX_16W | |
2141 | " 16W" | |
2142 | #endif | |
2143 | #ifdef CONFIG_ATM_ENI_BURST_RX_8W | |
2144 | " 8W" | |
2145 | #endif | |
2146 | #ifdef CONFIG_ATM_ENI_BURST_RX_4W | |
2147 | " 4W" | |
2148 | #endif | |
2149 | #ifdef CONFIG_ATM_ENI_BURST_RX_2W | |
2150 | " 2W" | |
2151 | #endif | |
2152 | #ifndef CONFIG_ATM_ENI_TUNE_BURST | |
2153 | " (default)" | |
2154 | #endif | |
2155 | "\n",""); | |
2156 | if (!--left) | |
2157 | return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", | |
2158 | "",eni_dev->tx_mult,eni_dev->rx_mult); | |
2159 | for (i = 0; i < NR_CHAN; i++) { | |
2160 | struct eni_tx *tx = eni_dev->tx+i; | |
2161 | ||
2162 | if (!tx->send) continue; | |
2163 | if (!--left) { | |
597aec3f | 2164 | return sprintf(page, "tx[%d]: 0x%lx-0x%lx " |
1da177e4 LT |
2165 | "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, |
2166 | (unsigned long) (tx->send - eni_dev->ram), | |
2167 | tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, | |
2168 | tx->reserved,tx->shaping, | |
2169 | tx == eni_dev->ubr ? " (UBR)" : ""); | |
2170 | } | |
2171 | if (--left) continue; | |
2172 | return sprintf(page,"%10sbacklog %u packets\n","", | |
2173 | skb_queue_len(&tx->backlog)); | |
2174 | } | |
2175 | read_lock(&vcc_sklist_lock); | |
2176 | for(i = 0; i < VCC_HTABLE_SIZE; ++i) { | |
2177 | struct hlist_head *head = &vcc_hash[i]; | |
2178 | ||
b67bfe0d | 2179 | sk_for_each(s, head) { |
1da177e4 LT |
2180 | struct eni_vcc *eni_vcc; |
2181 | int length; | |
2182 | ||
2183 | vcc = atm_sk(s); | |
2184 | if (vcc->dev != dev) | |
2185 | continue; | |
2186 | eni_vcc = ENI_VCC(vcc); | |
2187 | if (--left) continue; | |
2188 | length = sprintf(page,"vcc %4d: ",vcc->vci); | |
2189 | if (eni_vcc->rx) { | |
597aec3f | 2190 | length += sprintf(page+length, "0x%lx-0x%lx " |
1da177e4 LT |
2191 | "(%6ld bytes)", |
2192 | (unsigned long) (eni_vcc->recv - eni_dev->ram), | |
2193 | eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, | |
2194 | eni_vcc->words*4); | |
2195 | if (eni_vcc->tx) length += sprintf(page+length,", "); | |
2196 | } | |
2197 | if (eni_vcc->tx) | |
2198 | length += sprintf(page+length,"tx[%d], txing %d bytes", | |
2199 | eni_vcc->tx->index,eni_vcc->txing); | |
2200 | page[length] = '\n'; | |
2201 | read_unlock(&vcc_sklist_lock); | |
2202 | return length+1; | |
2203 | } | |
2204 | } | |
2205 | read_unlock(&vcc_sklist_lock); | |
2206 | for (i = 0; i < eni_dev->free_len; i++) { | |
2207 | struct eni_free *fe = eni_dev->free_list+i; | |
2208 | unsigned long offset; | |
2209 | ||
2210 | if (--left) continue; | |
2211 | offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; | |
2212 | return sprintf(page,"free %p-%p (%6d bytes)\n", | |
2213 | fe->start-offset,fe->start-offset+(1 << fe->order)-1, | |
2214 | 1 << fe->order); | |
2215 | } | |
2216 | return 0; | |
2217 | } | |
2218 | ||
2219 | ||
2220 | static const struct atmdev_ops ops = { | |
2221 | .open = eni_open, | |
2222 | .close = eni_close, | |
2223 | .ioctl = eni_ioctl, | |
2224 | .getsockopt = eni_getsockopt, | |
2225 | .setsockopt = eni_setsockopt, | |
2226 | .send = eni_send, | |
2227 | .phy_put = eni_phy_put, | |
2228 | .phy_get = eni_phy_get, | |
2229 | .change_qos = eni_change_qos, | |
2230 | .proc_read = eni_proc_read | |
2231 | }; | |
2232 | ||
2233 | ||
6c44512d GKH |
2234 | static int eni_init_one(struct pci_dev *pci_dev, |
2235 | const struct pci_device_id *ent) | |
1da177e4 LT |
2236 | { |
2237 | struct atm_dev *dev; | |
2238 | struct eni_dev *eni_dev; | |
126a3fd2 | 2239 | struct eni_zero *zero; |
2240 | int rc; | |
2241 | ||
2242 | rc = pci_enable_device(pci_dev); | |
2243 | if (rc < 0) | |
2244 | goto out; | |
1da177e4 | 2245 | |
ede58ef2 C |
2246 | rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); |
2247 | if (rc < 0) | |
2248 | goto out; | |
2249 | ||
126a3fd2 | 2250 | rc = -ENOMEM; |
2251 | eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); | |
2252 | if (!eni_dev) | |
2253 | goto err_disable; | |
1da177e4 | 2254 | |
126a3fd2 | 2255 | zero = &eni_dev->zero; |
ede58ef2 C |
2256 | zero->addr = dma_alloc_coherent(&pci_dev->dev, |
2257 | ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); | |
126a3fd2 | 2258 | if (!zero->addr) |
2259 | goto err_kfree; | |
1da177e4 | 2260 | |
d9ca676b | 2261 | dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); |
126a3fd2 | 2262 | if (!dev) |
2263 | goto err_free_consistent; | |
2264 | ||
2265 | dev->dev_data = eni_dev; | |
1da177e4 LT |
2266 | pci_set_drvdata(pci_dev, dev); |
2267 | eni_dev->pci_dev = pci_dev; | |
1da177e4 | 2268 | eni_dev->asic = ent->driver_data; |
126a3fd2 | 2269 | |
2270 | rc = eni_do_init(dev); | |
2271 | if (rc < 0) | |
2272 | goto err_unregister; | |
2273 | ||
2274 | rc = eni_start(dev); | |
2275 | if (rc < 0) | |
2276 | goto err_eni_release; | |
2277 | ||
1da177e4 LT |
2278 | eni_dev->more = eni_boards; |
2279 | eni_boards = dev; | |
126a3fd2 | 2280 | out: |
2281 | return rc; | |
2282 | ||
2283 | err_eni_release: | |
2284 | eni_do_release(dev); | |
2285 | err_unregister: | |
1da177e4 | 2286 | atm_dev_deregister(dev); |
126a3fd2 | 2287 | err_free_consistent: |
ede58ef2 | 2288 | dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); |
126a3fd2 | 2289 | err_kfree: |
1da177e4 | 2290 | kfree(eni_dev); |
126a3fd2 | 2291 | err_disable: |
2292 | pci_disable_device(pci_dev); | |
2293 | goto out; | |
1da177e4 LT |
2294 | } |
2295 | ||
2296 | ||
f283974c | 2297 | static const struct pci_device_id eni_pci_tbl[] = { |
53522288 PH |
2298 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, |
2299 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, | |
1da177e4 LT |
2300 | { 0, } |
2301 | }; | |
2302 | MODULE_DEVICE_TABLE(pci,eni_pci_tbl); | |
2303 | ||
2304 | ||
6c44512d | 2305 | static void eni_remove_one(struct pci_dev *pdev) |
1da177e4 | 2306 | { |
126a3fd2 | 2307 | struct atm_dev *dev = pci_get_drvdata(pdev); |
2308 | struct eni_dev *ed = ENI_DEV(dev); | |
2309 | struct eni_zero *zero = &ed->zero; | |
2310 | ||
2311 | eni_do_release(dev); | |
2312 | atm_dev_deregister(dev); | |
ede58ef2 | 2313 | dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); |
126a3fd2 | 2314 | kfree(ed); |
2315 | pci_disable_device(pdev); | |
1da177e4 LT |
2316 | } |
2317 | ||
2318 | ||
2319 | static struct pci_driver eni_driver = { | |
2320 | .name = DEV_LABEL, | |
2321 | .id_table = eni_pci_tbl, | |
2322 | .probe = eni_init_one, | |
6c44512d | 2323 | .remove = eni_remove_one, |
1da177e4 LT |
2324 | }; |
2325 | ||
2326 | ||
2327 | static int __init eni_init(void) | |
2328 | { | |
2329 | struct sk_buff *skb; /* dummy for sizeof */ | |
2330 | ||
5b5e0928 | 2331 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); |
1da177e4 LT |
2332 | return pci_register_driver(&eni_driver); |
2333 | } | |
2334 | ||
2335 | ||
2336 | module_init(eni_init); | |
2337 | /* @@@ since exit routine not defined, this module can not be unloaded */ | |
2338 | ||
2339 | MODULE_LICENSE("GPL"); |