1 | // SPDX-License-Identifier: GPL-2.0-only |
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> |
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> |
22 | #include <linux/slab.h> |
23 | #include <asm/io.h> |
24 | #include <linux/atomic.h> |
25 | #include <linux/uaccess.h> |
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 | /* |
35 | * TODO: |
36 | * |
37 | * Show stoppers |
38 | * none |
39 | * |
40 | * Minor |
41 | * - OAM support |
42 | * - fix bugs listed below |
43 | */ |
44 | |
45 | /* |
46 | * KNOWN BUGS: |
47 | * |
48 | * - may run into JK-JK bug and deadlock |
49 | * - should allocate UBR channel first |
50 | * - buffer space allocation algorithm is stupid |
51 | * (RX: should be maxSDU+maxdelay*rate |
52 | * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) |
53 | * - doesn't support OAM cells |
54 | * - eni_put_free may hang if not putting memory fragments that _complete_ |
55 | * 2^n block (never happens in real life, though) |
56 | */ |
57 | |
58 | |
59 | #if 0 |
60 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) |
61 | #else |
62 | #define DPRINTK(format,args...) |
63 | #endif |
64 | |
65 | |
66 | #ifndef CONFIG_ATM_ENI_TUNE_BURST |
67 | #define CONFIG_ATM_ENI_BURST_TX_8W |
68 | #define CONFIG_ATM_ENI_BURST_RX_4W |
69 | #endif |
70 | |
71 | |
72 | #ifndef CONFIG_ATM_ENI_DEBUG |
73 | |
74 | |
75 | #define NULLCHECK(x) |
76 | |
77 | #define EVENT(s,a,b) |
78 | |
79 | |
80 | static void event_dump(void) |
81 | { |
82 | } |
83 | |
84 | |
85 | #else |
86 | |
87 | |
88 | /* |
89 | * NULL pointer checking |
90 | */ |
91 | |
92 | #define NULLCHECK(x) \ |
93 | if ((unsigned long) (x) < 0x30) \ |
94 | printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) |
95 | |
96 | /* |
97 | * Very extensive activity logging. Greatly improves bug detection speed but |
98 | * costs a few Mbps if enabled. |
99 | */ |
100 | |
101 | #define EV 64 |
102 | |
103 | static const char *ev[EV]; |
104 | static unsigned long ev_a[EV],ev_b[EV]; |
105 | static int ec = 0; |
106 | |
107 | |
108 | static void EVENT(const char *s,unsigned long a,unsigned long b) |
109 | { |
110 | ev[ec] = s; |
111 | ev_a[ec] = a; |
112 | ev_b[ec] = b; |
113 | ec = (ec+1) % EV; |
114 | } |
115 | |
116 | |
117 | static void event_dump(void) |
118 | { |
119 | int n,i; |
120 | |
121 | for (n = 0; n < EV; n++) { |
122 | i = (ec+n) % EV; |
123 | printk(KERN_NOTICE); |
124 | printk(ev[i] ? ev[i] : "(null)" ,ev_a[i],ev_b[i]); |
125 | } |
126 | } |
127 | |
128 | |
129 | #endif /* CONFIG_ATM_ENI_DEBUG */ |
130 | |
131 | |
132 | /* |
133 | * NExx must not be equal at end |
134 | * EExx may be equal at end |
135 | * xxPJOK verify validity of pointer jumps |
136 | * xxPMOK operating on a circular buffer of "c" words |
137 | */ |
138 | |
139 | #define NEPJOK(a0,a1,b) \ |
140 | ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) |
141 | #define EEPJOK(a0,a1,b) \ |
142 | ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) |
143 | #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) |
144 | #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) |
145 | |
146 | |
147 | static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, |
148 | backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, |
149 | putting = 0; |
150 | |
151 | static struct atm_dev *eni_boards = NULL; |
152 | |
153 | /* Read/write registers on card */ |
154 | #define eni_in(r) readl(eni_dev->reg+(r)*4) |
155 | #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) |
156 | |
157 | |
158 | /*-------------------------------- utilities --------------------------------*/ |
159 | |
160 | |
161 | static void dump_mem(struct eni_dev *eni_dev) |
162 | { |
163 | int i; |
164 | |
165 | for (i = 0; i < eni_dev->free_len; i++) |
166 | printk(KERN_DEBUG " %d: %p %d\n" ,i, |
167 | eni_dev->free_list[i].start, |
168 | 1 << eni_dev->free_list[i].order); |
169 | } |
170 | |
171 | |
172 | static void dump(struct atm_dev *dev) |
173 | { |
174 | struct eni_dev *eni_dev; |
175 | |
176 | int i; |
177 | |
178 | eni_dev = ENI_DEV(dev); |
179 | printk(KERN_NOTICE "Free memory\n" ); |
180 | dump_mem(eni_dev); |
181 | printk(KERN_NOTICE "TX buffers\n" ); |
182 | for (i = 0; i < NR_CHAN; i++) |
183 | if (eni_dev->tx[i].send) |
184 | printk(KERN_NOTICE " TX %d @ %p: %ld\n" ,i, |
185 | eni_dev->tx[i].send,eni_dev->tx[i].words*4); |
186 | printk(KERN_NOTICE "RX buffers\n" ); |
187 | for (i = 0; i < 1024; i++) |
188 | if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) |
189 | printk(KERN_NOTICE " RX %d @ %p: %ld\n" ,i, |
190 | ENI_VCC(eni_dev->rx_map[i])->recv, |
191 | ENI_VCC(eni_dev->rx_map[i])->words*4); |
192 | printk(KERN_NOTICE "----\n" ); |
193 | } |
194 | |
195 | |
196 | static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, |
197 | unsigned long size) |
198 | { |
199 | struct eni_free *list; |
200 | int len,order; |
201 | |
202 | DPRINTK("init 0x%lx+%ld(0x%lx)\n" ,start,size,size); |
203 | start += eni_dev->base_diff; |
204 | list = eni_dev->free_list; |
205 | len = eni_dev->free_len; |
206 | while (size) { |
207 | if (len >= eni_dev->free_list_size) { |
208 | printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n" , |
209 | start,size); |
210 | break; |
211 | } |
212 | for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); |
213 | if (MID_MIN_BUF_SIZE > (1 << order)) { |
214 | printk(KERN_CRIT "eni_put_free: order %d too small\n" , |
215 | order); |
216 | break; |
217 | } |
218 | list[len].start = (void __iomem *) start; |
219 | list[len].order = order; |
220 | len++; |
221 | start += 1 << order; |
222 | size -= 1 << order; |
223 | } |
224 | eni_dev->free_len = len; |
225 | /*dump_mem(eni_dev);*/ |
226 | } |
227 | |
228 | |
229 | static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) |
230 | { |
231 | struct eni_free *list; |
232 | void __iomem *start; |
233 | int len,i,order,best_order,index; |
234 | |
235 | list = eni_dev->free_list; |
236 | len = eni_dev->free_len; |
237 | if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; |
238 | if (*size > MID_MAX_BUF_SIZE) return NULL; |
239 | for (order = 0; (1 << order) < *size; order++) |
240 | ; |
241 | DPRINTK("trying: %ld->%d\n" ,*size,order); |
242 | best_order = 65; /* we don't have more than 2^64 of anything ... */ |
243 | index = 0; /* silence GCC */ |
244 | for (i = 0; i < len; i++) |
245 | if (list[i].order == order) { |
246 | best_order = order; |
247 | index = i; |
248 | break; |
249 | } |
250 | else if (best_order > list[i].order && list[i].order > order) { |
251 | best_order = list[i].order; |
252 | index = i; |
253 | } |
254 | if (best_order == 65) return NULL; |
255 | start = list[index].start-eni_dev->base_diff; |
256 | list[index] = list[--len]; |
257 | eni_dev->free_len = len; |
258 | *size = 1 << order; |
259 | eni_put_free(eni_dev,start: start+*size,size: (1 << best_order)-*size); |
260 | DPRINTK("%ld bytes (order %d) at 0x%lx\n" ,*size,order,start); |
261 | memset_io(start,0,*size); /* never leak data */ |
262 | /*dump_mem(eni_dev);*/ |
263 | return start; |
264 | } |
265 | |
266 | |
267 | static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, |
268 | unsigned long size) |
269 | { |
270 | struct eni_free *list; |
271 | int len,i,order; |
272 | |
273 | start += eni_dev->base_diff; |
274 | list = eni_dev->free_list; |
275 | len = eni_dev->free_len; |
276 | for (order = -1; size; order++) size >>= 1; |
277 | DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n" ,start,size,order); |
278 | for (i = 0; i < len; i++) |
279 | if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && |
280 | list[i].order == order) { |
281 | DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n" ,i, |
282 | list[i].start,start,1 << order,list[i].order,order); |
283 | list[i] = list[--len]; |
284 | start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); |
285 | order++; |
286 | i = -1; |
287 | continue; |
288 | } |
289 | if (len >= eni_dev->free_list_size) { |
290 | printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n" ,start, |
291 | order); |
292 | return; |
293 | } |
294 | list[len].start = start; |
295 | list[len].order = order; |
296 | eni_dev->free_len = len+1; |
297 | /*dump_mem(eni_dev);*/ |
298 | } |
299 | |
300 | |
301 | /*----------------------------------- RX ------------------------------------*/ |
302 | |
303 | |
304 | #define ENI_VCC_NOS ((struct atm_vcc *) 1) |
305 | |
306 | |
307 | static void rx_ident_err(struct atm_vcc *vcc) |
308 | { |
309 | struct atm_dev *dev; |
310 | struct eni_dev *eni_dev; |
311 | struct eni_vcc *eni_vcc; |
312 | |
313 | dev = vcc->dev; |
314 | eni_dev = ENI_DEV(dev); |
315 | /* immediately halt adapter */ |
316 | eni_out(eni_in(MID_MC_S) & |
317 | ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); |
318 | /* dump useful information */ |
319 | eni_vcc = ENI_VCC(vcc); |
320 | printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " |
321 | "mismatch\n" ,dev->number); |
322 | printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n" ,vcc->vci, |
323 | eni_vcc->rxing,eni_vcc->words); |
324 | printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " |
325 | "0x%x\n" ,eni_vcc->descr,eni_vcc->rx_pos, |
326 | (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); |
327 | printk(KERN_ALERT " last %p, servicing %d\n" ,eni_vcc->last, |
328 | eni_vcc->servicing); |
329 | EVENT(s: "---dump ends here---\n" ,a: 0,b: 0); |
330 | printk(KERN_NOTICE "---recent events---\n" ); |
331 | event_dump(); |
332 | ENI_DEV(dev)->fast = NULL; /* really stop it */ |
333 | ENI_DEV(dev)->slow = NULL; |
334 | skb_queue_head_init(list: &ENI_DEV(dev)->rx_queue); |
335 | } |
336 | |
337 | |
338 | static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, |
339 | unsigned long skip,unsigned long size,unsigned long eff) |
340 | { |
341 | struct eni_dev *eni_dev; |
342 | struct eni_vcc *eni_vcc; |
343 | u32 dma_rd,dma_wr; |
344 | u32 dma[RX_DMA_BUF*2]; |
345 | dma_addr_t paddr; |
346 | unsigned long here; |
347 | int i,j; |
348 | |
349 | eni_dev = ENI_DEV(vcc->dev); |
350 | eni_vcc = ENI_VCC(vcc); |
351 | paddr = 0; /* GCC, shut up */ |
352 | if (skb) { |
353 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
354 | DMA_FROM_DEVICE); |
355 | if (dma_mapping_error(dev: &eni_dev->pci_dev->dev, dma_addr: paddr)) |
356 | goto dma_map_error; |
357 | ENI_PRV_PADDR(skb) = paddr; |
358 | if (paddr & 3) |
359 | printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " |
360 | "mis-aligned RX data (0x%lx)\n" ,vcc->dev->number, |
361 | vcc->vci,(unsigned long) paddr); |
362 | ENI_PRV_SIZE(skb) = size+skip; |
363 | /* PDU plus descriptor */ |
364 | ATM_SKB(skb)->vcc = vcc; |
365 | } |
366 | j = 0; |
367 | if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ |
368 | here = (eni_vcc->descr+skip) & (eni_vcc->words-1); |
369 | dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci |
370 | << MID_DMA_VCI_SHIFT) | MID_DT_JK; |
371 | dma[j++] = 0; |
372 | } |
373 | here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); |
374 | if (!eff) size += skip; |
375 | else { |
376 | unsigned long words; |
377 | |
378 | if (!size) { |
379 | DPRINTK("strange things happen ...\n" ); |
380 | EVENT(s: "strange things happen ... (skip=%ld,eff=%ld)\n" , |
381 | a: size,b: eff); |
382 | } |
383 | words = eff; |
384 | if (paddr & 15) { |
385 | unsigned long init; |
386 | |
387 | init = 4-((paddr & 15) >> 2); |
388 | if (init > words) init = words; |
389 | dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | |
390 | (vcc->vci << MID_DMA_VCI_SHIFT); |
391 | dma[j++] = paddr; |
392 | paddr += init << 2; |
393 | words -= init; |
394 | } |
395 | #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ |
396 | if (words & ~15) { |
397 | dma[j++] = MID_DT_16W | ((words >> 4) << |
398 | MID_DMA_COUNT_SHIFT) | (vcc->vci << |
399 | MID_DMA_VCI_SHIFT); |
400 | dma[j++] = paddr; |
401 | paddr += (words & ~15) << 2; |
402 | words &= 15; |
403 | } |
404 | #endif |
405 | #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ |
406 | if (words & ~7) { |
407 | dma[j++] = MID_DT_8W | ((words >> 3) << |
408 | MID_DMA_COUNT_SHIFT) | (vcc->vci << |
409 | MID_DMA_VCI_SHIFT); |
410 | dma[j++] = paddr; |
411 | paddr += (words & ~7) << 2; |
412 | words &= 7; |
413 | } |
414 | #endif |
415 | #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ |
416 | if (words & ~3) { |
417 | dma[j++] = MID_DT_4W | ((words >> 2) << |
418 | MID_DMA_COUNT_SHIFT) | (vcc->vci << |
419 | MID_DMA_VCI_SHIFT); |
420 | dma[j++] = paddr; |
421 | paddr += (words & ~3) << 2; |
422 | words &= 3; |
423 | } |
424 | #endif |
425 | #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ |
426 | if (words & ~1) { |
427 | dma[j++] = MID_DT_2W | ((words >> 1) << |
428 | MID_DMA_COUNT_SHIFT) | (vcc->vci << |
429 | MID_DMA_VCI_SHIFT); |
430 | dma[j++] = paddr; |
431 | paddr += (words & ~1) << 2; |
432 | words &= 1; |
433 | } |
434 | #endif |
435 | if (words) { |
436 | dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
437 | | (vcc->vci << MID_DMA_VCI_SHIFT); |
438 | dma[j++] = paddr; |
439 | } |
440 | } |
441 | if (size != eff) { |
442 | dma[j++] = (here << MID_DMA_COUNT_SHIFT) | |
443 | (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; |
444 | dma[j++] = 0; |
445 | } |
446 | if (!j || j > 2*RX_DMA_BUF) { |
447 | printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n" ); |
448 | goto trouble; |
449 | } |
450 | dma[j-2] |= MID_DMA_END; |
451 | j = j >> 1; |
452 | dma_wr = eni_in(MID_DMA_WR_RX); |
453 | dma_rd = eni_in(MID_DMA_RD_RX); |
454 | /* |
455 | * Can I move the dma_wr pointer by 2j+1 positions without overwriting |
456 | * data that hasn't been read (position of dma_rd) yet ? |
457 | */ |
458 | if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ |
459 | printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n" , |
460 | vcc->dev->number); |
461 | goto trouble; |
462 | } |
463 | for (i = 0; i < j; i++) { |
464 | writel(val: dma[i*2],addr: eni_dev->rx_dma+dma_wr*8); |
465 | writel(val: dma[i*2+1],addr: eni_dev->rx_dma+dma_wr*8+4); |
466 | dma_wr = (dma_wr+1) & (NR_DMA_RX-1); |
467 | } |
468 | if (skb) { |
469 | ENI_PRV_POS(skb) = eni_vcc->descr+size+1; |
470 | skb_queue_tail(list: &eni_dev->rx_queue,newsk: skb); |
471 | eni_vcc->last = skb; |
472 | rx_enqueued++; |
473 | } |
474 | eni_vcc->descr = here; |
475 | eni_out(dma_wr,MID_DMA_WR_RX); |
476 | return 0; |
477 | |
478 | trouble: |
479 | if (paddr) |
480 | dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, |
481 | DMA_FROM_DEVICE); |
482 | dma_map_error: |
483 | if (skb) dev_kfree_skb_irq(skb); |
484 | return -1; |
485 | } |
486 | |
487 | |
488 | static void discard(struct atm_vcc *vcc,unsigned long size) |
489 | { |
490 | struct eni_vcc *eni_vcc; |
491 | |
492 | eni_vcc = ENI_VCC(vcc); |
493 | EVENT(s: "discard (size=%ld)\n" ,a: size,b: 0); |
494 | while (do_rx_dma(vcc,NULL,skip: 1,size,eff: 0)) EVENT(s: "BUSY LOOP" ,a: 0,b: 0); |
495 | /* could do a full fallback, but that might be more expensive */ |
496 | if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; |
497 | else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); |
498 | } |
499 | |
500 | |
501 | /* |
502 | * TODO: should check whether direct copies (without DMA setup, dequeuing on |
503 | * interrupt, etc.) aren't much faster for AAL0 |
504 | */ |
505 | |
506 | static int rx_aal0(struct atm_vcc *vcc) |
507 | { |
508 | struct eni_vcc *eni_vcc; |
509 | unsigned long descr; |
510 | unsigned long length; |
511 | struct sk_buff *skb; |
512 | |
513 | DPRINTK(">rx_aal0\n" ); |
514 | eni_vcc = ENI_VCC(vcc); |
515 | descr = readl(addr: eni_vcc->recv+eni_vcc->descr*4); |
516 | if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { |
517 | rx_ident_err(vcc); |
518 | return 1; |
519 | } |
520 | if (descr & MID_RED_T) { |
521 | DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n" , |
522 | vcc->dev->number); |
523 | length = 0; |
524 | atomic_inc(v: &vcc->stats->rx_err); |
525 | } |
526 | else { |
527 | length = ATM_CELL_SIZE-1; /* no HEC */ |
528 | } |
529 | skb = length ? atm_alloc_charge(vcc,pdu_size: length,GFP_ATOMIC) : NULL; |
530 | if (!skb) { |
531 | discard(vcc,size: length >> 2); |
532 | return 0; |
533 | } |
534 | skb_put(skb,len: length); |
535 | skb->tstamp = eni_vcc->timestamp; |
536 | DPRINTK("got len %ld\n" ,length); |
537 | if (do_rx_dma(vcc,skb,skip: 1,size: length >> 2,eff: length >> 2)) return 1; |
538 | eni_vcc->rxing++; |
539 | return 0; |
540 | } |
541 | |
542 | |
543 | static int rx_aal5(struct atm_vcc *vcc) |
544 | { |
545 | struct eni_vcc *eni_vcc; |
546 | unsigned long descr; |
547 | unsigned long size,eff,length; |
548 | struct sk_buff *skb; |
549 | |
550 | EVENT(s: "rx_aal5\n" ,a: 0,b: 0); |
551 | DPRINTK(">rx_aal5\n" ); |
552 | eni_vcc = ENI_VCC(vcc); |
553 | descr = readl(addr: eni_vcc->recv+eni_vcc->descr*4); |
554 | if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { |
555 | rx_ident_err(vcc); |
556 | return 1; |
557 | } |
558 | if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { |
559 | if (descr & MID_RED_T) { |
560 | EVENT(s: "empty cell (descr=0x%lx)\n" ,a: descr,b: 0); |
561 | DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n" , |
562 | vcc->dev->number); |
563 | size = 0; |
564 | } |
565 | else { |
566 | static unsigned long silence = 0; |
567 | |
568 | if (time_after(jiffies, silence) || silence == 0) { |
569 | printk(KERN_WARNING DEV_LABEL "(itf %d): " |
570 | "discarding PDU(s) with CRC error\n" , |
571 | vcc->dev->number); |
572 | silence = (jiffies+2*HZ)|1; |
573 | } |
574 | size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); |
575 | EVENT(s: "CRC error (descr=0x%lx,size=%ld)\n" ,a: descr, |
576 | b: size); |
577 | } |
578 | eff = length = 0; |
579 | atomic_inc(v: &vcc->stats->rx_err); |
580 | } |
581 | else { |
582 | size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); |
583 | DPRINTK("size=%ld\n" ,size); |
584 | length = readl(addr: eni_vcc->recv+(((eni_vcc->descr+size-1) & |
585 | (eni_vcc->words-1)))*4) & 0xffff; |
586 | /* -trailer(2)+header(1) */ |
587 | if (length && length <= (size << 2)-8 && length <= |
588 | ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; |
589 | else { /* ^ trailer length (8) */ |
590 | EVENT(s: "bad PDU (descr=0x08%lx,length=%ld)\n" ,a: descr, |
591 | b: length); |
592 | printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " |
593 | "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n" , |
594 | vcc->dev->number,vcc->vci,length,size << 2,descr); |
595 | length = eff = 0; |
596 | atomic_inc(v: &vcc->stats->rx_err); |
597 | } |
598 | } |
599 | skb = eff ? atm_alloc_charge(vcc,pdu_size: eff << 2,GFP_ATOMIC) : NULL; |
600 | if (!skb) { |
601 | discard(vcc,size); |
602 | return 0; |
603 | } |
604 | skb_put(skb,len: length); |
605 | DPRINTK("got len %ld\n" ,length); |
606 | if (do_rx_dma(vcc,skb,skip: 1,size,eff)) return 1; |
607 | eni_vcc->rxing++; |
608 | return 0; |
609 | } |
610 | |
611 | |
612 | static inline int rx_vcc(struct atm_vcc *vcc) |
613 | { |
614 | void __iomem *vci_dsc; |
615 | unsigned long tmp; |
616 | struct eni_vcc *eni_vcc; |
617 | |
618 | eni_vcc = ENI_VCC(vcc); |
619 | vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; |
620 | EVENT(s: "rx_vcc(1)\n" ,a: 0,b: 0); |
621 | while (eni_vcc->descr != (tmp = (readl(addr: vci_dsc+4) & MID_VCI_DESCR) >> |
622 | MID_VCI_DESCR_SHIFT)) { |
623 | EVENT(s: "rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n" , |
624 | a: eni_vcc->descr,b: tmp); |
625 | DPRINTK("CB_DESCR %ld REG_DESCR %d\n" ,ENI_VCC(vcc)->descr, |
626 | (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> |
627 | MID_VCI_DESCR_SHIFT)); |
628 | if (ENI_VCC(vcc)->rx(vcc)) return 1; |
629 | } |
630 | /* clear IN_SERVICE flag */ |
631 | writel(readl(addr: vci_dsc) & ~MID_VCI_IN_SERVICE,addr: vci_dsc); |
632 | /* |
633 | * If new data has arrived between evaluating the while condition and |
634 | * clearing IN_SERVICE, we wouldn't be notified until additional data |
635 | * follows. So we have to loop again to be sure. |
636 | */ |
637 | EVENT(s: "rx_vcc(3)\n" ,a: 0,b: 0); |
638 | while (ENI_VCC(vcc)->descr != (tmp = (readl(addr: vci_dsc+4) & MID_VCI_DESCR) |
639 | >> MID_VCI_DESCR_SHIFT)) { |
640 | EVENT(s: "rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n" , |
641 | a: eni_vcc->descr,b: tmp); |
642 | DPRINTK("CB_DESCR %ld REG_DESCR %d\n" ,ENI_VCC(vcc)->descr, |
643 | (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> |
644 | MID_VCI_DESCR_SHIFT)); |
645 | if (ENI_VCC(vcc)->rx(vcc)) return 1; |
646 | } |
647 | return 0; |
648 | } |
649 | |
650 | |
651 | static void poll_rx(struct atm_dev *dev) |
652 | { |
653 | struct eni_dev *eni_dev; |
654 | struct atm_vcc *curr; |
655 | |
656 | eni_dev = ENI_DEV(dev); |
657 | while ((curr = eni_dev->fast)) { |
658 | EVENT(s: "poll_rx.fast\n" ,a: 0,b: 0); |
659 | if (rx_vcc(vcc: curr)) return; |
660 | eni_dev->fast = ENI_VCC(curr)->next; |
661 | ENI_VCC(curr)->next = ENI_VCC_NOS; |
662 | barrier(); |
663 | ENI_VCC(curr)->servicing--; |
664 | } |
665 | while ((curr = eni_dev->slow)) { |
666 | EVENT(s: "poll_rx.slow\n" ,a: 0,b: 0); |
667 | if (rx_vcc(vcc: curr)) return; |
668 | eni_dev->slow = ENI_VCC(curr)->next; |
669 | ENI_VCC(curr)->next = ENI_VCC_NOS; |
670 | barrier(); |
671 | ENI_VCC(curr)->servicing--; |
672 | } |
673 | } |
674 | |
675 | |
676 | static void get_service(struct atm_dev *dev) |
677 | { |
678 | struct eni_dev *eni_dev; |
679 | struct atm_vcc *vcc; |
680 | unsigned long vci; |
681 | |
682 | DPRINTK(">get_service\n" ); |
683 | eni_dev = ENI_DEV(dev); |
684 | while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { |
685 | vci = readl(addr: eni_dev->service+eni_dev->serv_read*4); |
686 | eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); |
687 | vcc = eni_dev->rx_map[vci & 1023]; |
688 | if (!vcc) { |
689 | printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " |
690 | "found\n" ,dev->number,vci); |
691 | continue; /* nasty but we try to go on anyway */ |
692 | /* @@@ nope, doesn't work */ |
693 | } |
694 | EVENT(s: "getting from service\n" ,a: 0,b: 0); |
695 | if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { |
696 | EVENT(s: "double service\n" ,a: 0,b: 0); |
697 | DPRINTK("Grr, servicing VCC %ld twice\n" ,vci); |
698 | continue; |
699 | } |
700 | ENI_VCC(vcc)->timestamp = ktime_get_real(); |
701 | ENI_VCC(vcc)->next = NULL; |
702 | if (vcc->qos.rxtp.traffic_class == ATM_CBR) { |
703 | if (eni_dev->fast) |
704 | ENI_VCC(eni_dev->last_fast)->next = vcc; |
705 | else eni_dev->fast = vcc; |
706 | eni_dev->last_fast = vcc; |
707 | } |
708 | else { |
709 | if (eni_dev->slow) |
710 | ENI_VCC(eni_dev->last_slow)->next = vcc; |
711 | else eni_dev->slow = vcc; |
712 | eni_dev->last_slow = vcc; |
713 | } |
714 | putting++; |
715 | ENI_VCC(vcc)->servicing++; |
716 | } |
717 | } |
718 | |
719 | |
720 | static void dequeue_rx(struct atm_dev *dev) |
721 | { |
722 | struct eni_dev *eni_dev; |
723 | struct eni_vcc *eni_vcc; |
724 | struct atm_vcc *vcc; |
725 | struct sk_buff *skb; |
726 | void __iomem *vci_dsc; |
727 | int first; |
728 | |
729 | eni_dev = ENI_DEV(dev); |
730 | first = 1; |
731 | while (1) { |
732 | skb = skb_dequeue(list: &eni_dev->rx_queue); |
733 | if (!skb) { |
734 | if (first) { |
735 | DPRINTK(DEV_LABEL "(itf %d): RX but not " |
736 | "rxing\n" ,dev->number); |
737 | EVENT(s: "nothing to dequeue\n" ,a: 0,b: 0); |
738 | } |
739 | break; |
740 | } |
741 | EVENT(s: "dequeued (size=%ld,pos=0x%lx)\n" ,ENI_PRV_SIZE(skb), |
742 | ENI_PRV_POS(skb)); |
743 | rx_dequeued++; |
744 | vcc = ATM_SKB(skb)->vcc; |
745 | eni_vcc = ENI_VCC(vcc); |
746 | first = 0; |
747 | vci_dsc = eni_dev->vci+vcc->vci*16; |
748 | if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), |
749 | (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, |
750 | eni_vcc->words)) { |
751 | EVENT(s: "requeuing\n" ,a: 0,b: 0); |
752 | skb_queue_head(list: &eni_dev->rx_queue,newsk: skb); |
753 | break; |
754 | } |
755 | eni_vcc->rxing--; |
756 | eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); |
757 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
758 | DMA_TO_DEVICE); |
759 | if (!skb->len) dev_kfree_skb_irq(skb); |
760 | else { |
761 | EVENT(s: "pushing (len=%ld)\n" ,a: skb->len,b: 0); |
762 | if (vcc->qos.aal == ATM_AAL0) |
763 | *(unsigned long *) skb->data = |
764 | ntohl(*(unsigned long *) skb->data); |
765 | memset(skb->cb,0,sizeof(struct eni_skb_prv)); |
766 | vcc->push(vcc,skb); |
767 | pushed++; |
768 | } |
769 | atomic_inc(v: &vcc->stats->rx); |
770 | } |
771 | wake_up(&eni_dev->rx_wait); |
772 | } |
773 | |
774 | |
775 | static int open_rx_first(struct atm_vcc *vcc) |
776 | { |
777 | struct eni_dev *eni_dev; |
778 | struct eni_vcc *eni_vcc; |
779 | unsigned long size; |
780 | |
781 | DPRINTK("open_rx_first\n" ); |
782 | eni_dev = ENI_DEV(vcc->dev); |
783 | eni_vcc = ENI_VCC(vcc); |
784 | eni_vcc->rx = NULL; |
785 | if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; |
786 | size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; |
787 | if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= |
788 | MID_MAX_BUF_SIZE) |
789 | size = MID_MAX_BUF_SIZE; |
790 | eni_vcc->recv = eni_alloc_mem(eni_dev,size: &size); |
791 | DPRINTK("rx at 0x%lx\n" ,eni_vcc->recv); |
792 | eni_vcc->words = size >> 2; |
793 | if (!eni_vcc->recv) return -ENOBUFS; |
794 | eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; |
795 | eni_vcc->descr = 0; |
796 | eni_vcc->rx_pos = 0; |
797 | eni_vcc->rxing = 0; |
798 | eni_vcc->servicing = 0; |
799 | eni_vcc->next = ENI_VCC_NOS; |
800 | return 0; |
801 | } |
802 | |
803 | |
804 | static int open_rx_second(struct atm_vcc *vcc) |
805 | { |
806 | void __iomem *here; |
807 | struct eni_dev *eni_dev; |
808 | struct eni_vcc *eni_vcc; |
809 | unsigned long size; |
810 | int order; |
811 | |
812 | DPRINTK("open_rx_second\n" ); |
813 | eni_dev = ENI_DEV(vcc->dev); |
814 | eni_vcc = ENI_VCC(vcc); |
815 | if (!eni_vcc->rx) return 0; |
816 | /* set up VCI descriptor */ |
817 | here = eni_dev->vci+vcc->vci*16; |
818 | DPRINTK("loc 0x%x\n" ,(unsigned) (eni_vcc->recv-eni_dev->ram)/4); |
819 | size = eni_vcc->words >> 8; |
820 | for (order = -1; size; order++) size >>= 1; |
821 | writel(val: 0,addr: here+4); /* descr, read = 0 */ |
822 | writel(val: 0,addr: here+8); /* write, state, count = 0 */ |
823 | if (eni_dev->rx_map[vcc->vci]) |
824 | printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " |
825 | "in use\n" ,vcc->dev->number,vcc->vci); |
826 | eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ |
827 | writel(val: ((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << |
828 | MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | |
829 | (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << |
830 | MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),addr: here); |
831 | return 0; |
832 | } |
833 | |
834 | |
835 | static void close_rx(struct atm_vcc *vcc) |
836 | { |
837 | DECLARE_WAITQUEUE(wait,current); |
838 | void __iomem *here; |
839 | struct eni_dev *eni_dev; |
840 | struct eni_vcc *eni_vcc; |
841 | |
842 | eni_vcc = ENI_VCC(vcc); |
843 | if (!eni_vcc->rx) return; |
844 | eni_dev = ENI_DEV(vcc->dev); |
845 | if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { |
846 | here = eni_dev->vci+vcc->vci*16; |
847 | /* block receiver */ |
848 | writel(val: (readl(addr: here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << |
849 | MID_VCI_MODE_SHIFT),addr: here); |
850 | /* wait for receiver to become idle */ |
851 | udelay(27); |
852 | /* discard pending cell */ |
853 | writel(readl(addr: here) & ~MID_VCI_IN_SERVICE,addr: here); |
854 | /* don't accept any new ones */ |
855 | eni_dev->rx_map[vcc->vci] = NULL; |
856 | /* wait for RX queue to drain */ |
857 | DPRINTK("eni_close: waiting for RX ...\n" ); |
858 | EVENT(s: "RX closing\n" ,a: 0,b: 0); |
859 | add_wait_queue(wq_head: &eni_dev->rx_wait,wq_entry: &wait); |
860 | set_current_state(TASK_UNINTERRUPTIBLE); |
861 | barrier(); |
862 | for (;;) { |
863 | /* transition service->rx: rxing++, servicing-- */ |
864 | if (!eni_vcc->servicing) { |
865 | barrier(); |
866 | if (!eni_vcc->rxing) break; |
867 | } |
868 | EVENT(s: "drain PDUs (rx %ld, serv %ld)\n" ,a: eni_vcc->rxing, |
869 | b: eni_vcc->servicing); |
870 | printk(KERN_INFO "%d+%d RX left\n" ,eni_vcc->servicing, |
871 | eni_vcc->rxing); |
872 | schedule(); |
873 | set_current_state(TASK_UNINTERRUPTIBLE); |
874 | } |
875 | for (;;) { |
876 | int at_end; |
877 | u32 tmp; |
878 | |
879 | tasklet_disable(t: &eni_dev->task); |
880 | tmp = readl(addr: eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; |
881 | at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; |
882 | tasklet_enable(t: &eni_dev->task); |
883 | if (at_end) break; |
884 | EVENT(s: "drain discard (host 0x%lx, nic 0x%lx)\n" , |
885 | a: eni_vcc->rx_pos,b: tmp); |
886 | printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n" , |
887 | eni_vcc->rx_pos,tmp); |
888 | schedule(); |
889 | set_current_state(TASK_UNINTERRUPTIBLE); |
890 | } |
891 | set_current_state(TASK_RUNNING); |
892 | remove_wait_queue(wq_head: &eni_dev->rx_wait,wq_entry: &wait); |
893 | } |
894 | eni_free_mem(eni_dev,start: eni_vcc->recv,size: eni_vcc->words << 2); |
895 | eni_vcc->rx = NULL; |
896 | } |
897 | |
898 | |
899 | static int start_rx(struct atm_dev *dev) |
900 | { |
901 | struct eni_dev *eni_dev; |
902 | |
903 | eni_dev = ENI_DEV(dev); |
904 | eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); |
905 | if (!eni_dev->rx_map) { |
906 | printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n" , |
907 | dev->number); |
908 | free_page((unsigned long) eni_dev->free_list); |
909 | return -ENOMEM; |
910 | } |
911 | eni_dev->rx_mult = DEFAULT_RX_MULT; |
912 | eni_dev->fast = eni_dev->last_fast = NULL; |
913 | eni_dev->slow = eni_dev->last_slow = NULL; |
914 | init_waitqueue_head(&eni_dev->rx_wait); |
915 | skb_queue_head_init(list: &eni_dev->rx_queue); |
916 | eni_dev->serv_read = eni_in(MID_SERV_WRITE); |
917 | eni_out(0,MID_DMA_WR_RX); |
918 | return 0; |
919 | } |
920 | |
921 | |
922 | /*----------------------------------- TX ------------------------------------*/ |
923 | |
924 | |
925 | enum enq_res { enq_ok,enq_next,enq_jam }; |
926 | |
927 | |
928 | static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, |
929 | u32 size) |
930 | { |
931 | u32 init,words; |
932 | |
933 | DPRINTK("put_dma: 0x%lx+0x%x\n" ,(unsigned long) paddr,size); |
934 | EVENT(s: "put_dma: 0x%lx+0x%lx\n" ,a: (unsigned long) paddr,b: size); |
935 | #if 0 /* don't complain anymore */ |
936 | if (paddr & 3) |
937 | printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n" ,paddr); |
938 | if (size & 3) |
939 | printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n" ,size); |
940 | #endif |
941 | if (paddr & 3) { |
942 | init = 4-(paddr & 3); |
943 | if (init > size || size < 7) init = size; |
944 | DPRINTK("put_dma: %lx DMA: %d/%d bytes\n" , |
945 | (unsigned long) paddr,init,size); |
946 | dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | |
947 | (chan << MID_DMA_CHAN_SHIFT); |
948 | dma[(*j)++] = paddr; |
949 | paddr += init; |
950 | size -= init; |
951 | } |
952 | words = size >> 2; |
953 | size &= 3; |
954 | if (words && (paddr & 31)) { |
955 | init = 8-((paddr & 31) >> 2); |
956 | if (init > words) init = words; |
957 | DPRINTK("put_dma: %lx DMA: %d/%d words\n" , |
958 | (unsigned long) paddr,init,words); |
959 | dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | |
960 | (chan << MID_DMA_CHAN_SHIFT); |
961 | dma[(*j)++] = paddr; |
962 | paddr += init << 2; |
963 | words -= init; |
964 | } |
965 | #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ |
966 | if (words & ~15) { |
967 | DPRINTK("put_dma: %lx DMA: %d*16/%d words\n" , |
968 | (unsigned long) paddr,words >> 4,words); |
969 | dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) |
970 | | (chan << MID_DMA_CHAN_SHIFT); |
971 | dma[(*j)++] = paddr; |
972 | paddr += (words & ~15) << 2; |
973 | words &= 15; |
974 | } |
975 | #endif |
976 | #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ |
977 | if (words & ~7) { |
978 | DPRINTK("put_dma: %lx DMA: %d*8/%d words\n" , |
979 | (unsigned long) paddr,words >> 3,words); |
980 | dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) |
981 | | (chan << MID_DMA_CHAN_SHIFT); |
982 | dma[(*j)++] = paddr; |
983 | paddr += (words & ~7) << 2; |
984 | words &= 7; |
985 | } |
986 | #endif |
987 | #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ |
988 | if (words & ~3) { |
989 | DPRINTK("put_dma: %lx DMA: %d*4/%d words\n" , |
990 | (unsigned long) paddr,words >> 2,words); |
991 | dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) |
992 | | (chan << MID_DMA_CHAN_SHIFT); |
993 | dma[(*j)++] = paddr; |
994 | paddr += (words & ~3) << 2; |
995 | words &= 3; |
996 | } |
997 | #endif |
998 | #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ |
999 | if (words & ~1) { |
1000 | DPRINTK("put_dma: %lx DMA: %d*2/%d words\n" , |
1001 | (unsigned long) paddr,words >> 1,words); |
1002 | dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) |
1003 | | (chan << MID_DMA_CHAN_SHIFT); |
1004 | dma[(*j)++] = paddr; |
1005 | paddr += (words & ~1) << 2; |
1006 | words &= 1; |
1007 | } |
1008 | #endif |
1009 | if (words) { |
1010 | DPRINTK("put_dma: %lx DMA: %d words\n" ,(unsigned long) paddr, |
1011 | words); |
1012 | dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | |
1013 | (chan << MID_DMA_CHAN_SHIFT); |
1014 | dma[(*j)++] = paddr; |
1015 | paddr += words << 2; |
1016 | } |
1017 | if (size) { |
1018 | DPRINTK("put_dma: %lx DMA: %d bytes\n" ,(unsigned long) paddr, |
1019 | size); |
1020 | dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | |
1021 | (chan << MID_DMA_CHAN_SHIFT); |
1022 | dma[(*j)++] = paddr; |
1023 | } |
1024 | } |
1025 | |
1026 | |
1027 | static enum enq_res do_tx(struct sk_buff *skb) |
1028 | { |
1029 | struct atm_vcc *vcc; |
1030 | struct eni_dev *eni_dev; |
1031 | struct eni_vcc *eni_vcc; |
1032 | struct eni_tx *tx; |
1033 | dma_addr_t paddr; |
1034 | u32 dma_rd,dma_wr; |
1035 | u32 size; /* in words */ |
1036 | int aal5,dma_size,i,j; |
1037 | unsigned char skb_data3; |
1038 | |
1039 | DPRINTK(">do_tx\n" ); |
1040 | NULLCHECK(skb); |
1041 | EVENT(s: "do_tx: skb=0x%lx, %ld bytes\n" ,a: (unsigned long) skb,b: skb->len); |
1042 | vcc = ATM_SKB(skb)->vcc; |
1043 | NULLCHECK(vcc); |
1044 | eni_dev = ENI_DEV(vcc->dev); |
1045 | NULLCHECK(eni_dev); |
1046 | eni_vcc = ENI_VCC(vcc); |
1047 | tx = eni_vcc->tx; |
1048 | NULLCHECK(tx); |
1049 | #if 0 /* Enable this for testing with the "align" program */ |
1050 | { |
1051 | unsigned int hack = *((char *) skb->data)-'0'; |
1052 | |
1053 | if (hack < 8) { |
1054 | skb->data += hack; |
1055 | skb->len -= hack; |
1056 | } |
1057 | } |
1058 | #endif |
1059 | #if 0 /* should work now */ |
1060 | if ((unsigned long) skb->data & 3) |
1061 | printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " |
1062 | "TX data\n" ,vcc->dev->number,vcc->vci); |
1063 | #endif |
1064 | /* |
1065 | * Potential future IP speedup: make hard_header big enough to put |
1066 | * segmentation descriptor directly into PDU. Saves: 4 slave writes, |
1067 | * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) |
1068 | */ |
1069 | |
1070 | aal5 = vcc->qos.aal == ATM_AAL5; |
1071 | /* check space in buffer */ |
1072 | if (!aal5) |
1073 | size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; |
1074 | /* cell without HEC plus segmentation header (includes |
1075 | four-byte cell header) */ |
1076 | else { |
1077 | size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; |
1078 | /* add AAL5 trailer */ |
1079 | size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; |
1080 | /* add segmentation header */ |
1081 | } |
1082 | /* |
1083 | * Can I move tx_pos by size bytes without getting closer than TX_GAP |
1084 | * to the read pointer ? TX_GAP means to leave some space for what |
1085 | * the manual calls "too close". |
1086 | */ |
1087 | if (!NEPMOK(tx->tx_pos,size+TX_GAP, |
1088 | eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { |
1089 | DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n" , |
1090 | vcc->dev->number,size); |
1091 | return enq_next; |
1092 | } |
1093 | /* check DMA */ |
1094 | dma_wr = eni_in(MID_DMA_WR_TX); |
1095 | dma_rd = eni_in(MID_DMA_RD_TX); |
1096 | dma_size = 3; /* JK for descriptor and final fill, plus final size |
1097 | mis-alignment fix */ |
1098 | DPRINTK("iovcnt = %d\n" ,skb_shinfo(skb)->nr_frags); |
1099 | if (!skb_shinfo(skb)->nr_frags) dma_size += 5; |
1100 | else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); |
1101 | if (dma_size > TX_DMA_BUF) { |
1102 | printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " |
1103 | "(got only %d)\n" ,vcc->dev->number,dma_size,TX_DMA_BUF); |
1104 | } |
1105 | DPRINTK("dma_wr is %d, tx_pos is %ld\n" ,dma_wr,tx->tx_pos); |
1106 | if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < |
1107 | dma_size) { |
1108 | printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n" , |
1109 | vcc->dev->number); |
1110 | return enq_jam; |
1111 | } |
1112 | skb_data3 = skb->data[3]; |
1113 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
1114 | DMA_TO_DEVICE); |
1115 | if (dma_mapping_error(dev: &eni_dev->pci_dev->dev, dma_addr: paddr)) |
1116 | return enq_next; |
1117 | ENI_PRV_PADDR(skb) = paddr; |
1118 | /* prepare DMA queue entries */ |
1119 | j = 0; |
1120 | eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << |
1121 | MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | |
1122 | MID_DT_JK; |
1123 | j++; |
1124 | if (!skb_shinfo(skb)->nr_frags) |
1125 | if (aal5) put_dma(chan: tx->index,dma: eni_dev->dma,j: &j,paddr,size: skb->len); |
1126 | else put_dma(chan: tx->index,dma: eni_dev->dma,j: &j,paddr: paddr+4,size: skb->len-4); |
1127 | else { |
1128 | DPRINTK("doing direct send\n" ); /* @@@ well, this doesn't work anyway */ |
1129 | for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) |
1130 | if (i == -1) |
1131 | put_dma(chan: tx->index,dma: eni_dev->dma,j: &j,paddr: (unsigned long) |
1132 | skb->data, |
1133 | size: skb_headlen(skb)); |
1134 | else |
1135 | put_dma(chan: tx->index,dma: eni_dev->dma,j: &j,paddr: (unsigned long) |
1136 | skb_frag_page(frag: &skb_shinfo(skb)->frags[i]) + |
1137 | skb_frag_off(frag: &skb_shinfo(skb)->frags[i]), |
1138 | size: skb_frag_size(frag: &skb_shinfo(skb)->frags[i])); |
1139 | } |
1140 | if (skb->len & 3) { |
1141 | put_dma(chan: tx->index, dma: eni_dev->dma, j: &j, paddr: eni_dev->zero.dma, |
1142 | size: 4 - (skb->len & 3)); |
1143 | } |
1144 | /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ |
1145 | eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << |
1146 | MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | |
1147 | MID_DMA_END | MID_DT_JK; |
1148 | j++; |
1149 | DPRINTK("DMA at end: %d\n" ,j); |
1150 | /* store frame */ |
1151 | writel(val: (MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | |
1152 | (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | |
1153 | (tx->resolution << MID_SEG_RATE_SHIFT) | |
1154 | (size/(ATM_CELL_PAYLOAD/4)),addr: tx->send+tx->tx_pos*4); |
1155 | /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ |
1156 | writel(val: (vcc->vci << MID_SEG_VCI_SHIFT) | |
1157 | (aal5 ? 0 : (skb_data3 & 0xf)) | |
1158 | (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), |
1159 | addr: tx->send+((tx->tx_pos+1) & (tx->words-1))*4); |
1160 | DPRINTK("size: %d, len:%d\n" ,size,skb->len); |
1161 | if (aal5) |
1162 | writel(val: skb->len,addr: tx->send+ |
1163 | ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); |
1164 | j = j >> 1; |
1165 | for (i = 0; i < j; i++) { |
1166 | writel(val: eni_dev->dma[i*2],addr: eni_dev->tx_dma+dma_wr*8); |
1167 | writel(val: eni_dev->dma[i*2+1],addr: eni_dev->tx_dma+dma_wr*8+4); |
1168 | dma_wr = (dma_wr+1) & (NR_DMA_TX-1); |
1169 | } |
1170 | ENI_PRV_POS(skb) = tx->tx_pos; |
1171 | ENI_PRV_SIZE(skb) = size; |
1172 | ENI_VCC(vcc)->txing += size; |
1173 | tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); |
1174 | DPRINTK("dma_wr set to %d, tx_pos is now %ld\n" ,dma_wr,tx->tx_pos); |
1175 | eni_out(dma_wr,MID_DMA_WR_TX); |
1176 | skb_queue_tail(list: &eni_dev->tx_queue,newsk: skb); |
1177 | queued++; |
1178 | return enq_ok; |
1179 | } |
1180 | |
1181 | |
1182 | static void poll_tx(struct atm_dev *dev) |
1183 | { |
1184 | struct eni_tx *tx; |
1185 | struct sk_buff *skb; |
1186 | enum enq_res res; |
1187 | int i; |
1188 | |
1189 | DPRINTK(">poll_tx\n" ); |
1190 | for (i = NR_CHAN-1; i >= 0; i--) { |
1191 | tx = &ENI_DEV(dev)->tx[i]; |
1192 | if (tx->send) |
1193 | while ((skb = skb_dequeue(list: &tx->backlog))) { |
1194 | res = do_tx(skb); |
1195 | if (res == enq_ok) continue; |
1196 | DPRINTK("re-queuing TX PDU\n" ); |
1197 | skb_queue_head(list: &tx->backlog,newsk: skb); |
1198 | requeued++; |
1199 | if (res == enq_jam) return; |
1200 | break; |
1201 | } |
1202 | } |
1203 | } |
1204 | |
1205 | |
1206 | static void dequeue_tx(struct atm_dev *dev) |
1207 | { |
1208 | struct eni_dev *eni_dev; |
1209 | struct atm_vcc *vcc; |
1210 | struct sk_buff *skb; |
1211 | struct eni_tx *tx; |
1212 | |
1213 | NULLCHECK(dev); |
1214 | eni_dev = ENI_DEV(dev); |
1215 | NULLCHECK(eni_dev); |
1216 | while ((skb = skb_dequeue(list: &eni_dev->tx_queue))) { |
1217 | vcc = ATM_SKB(skb)->vcc; |
1218 | NULLCHECK(vcc); |
1219 | tx = ENI_VCC(vcc)->tx; |
1220 | NULLCHECK(ENI_VCC(vcc)->tx); |
1221 | DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n" ,ENI_PRV_POS(skb), |
1222 | (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); |
1223 | if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == |
1224 | eni_in(MID_TX_DESCRSTART(tx->index))) { |
1225 | skb_queue_head(list: &eni_dev->tx_queue,newsk: skb); |
1226 | break; |
1227 | } |
1228 | ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); |
1229 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
1230 | DMA_TO_DEVICE); |
1231 | if (vcc->pop) vcc->pop(vcc,skb); |
1232 | else dev_kfree_skb_irq(skb); |
1233 | atomic_inc(v: &vcc->stats->tx); |
1234 | wake_up(&eni_dev->tx_wait); |
1235 | dma_complete++; |
1236 | } |
1237 | } |
1238 | |
1239 | |
1240 | static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) |
1241 | { |
1242 | int i; |
1243 | |
1244 | for (i = !ubr; i < NR_CHAN; i++) |
1245 | if (!eni_dev->tx[i].send) return eni_dev->tx+i; |
1246 | return NULL; |
1247 | } |
1248 | |
1249 | |
1250 | static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, |
1251 | int *res,int unlimited) |
1252 | { |
1253 | static const int pre_div[] = { 4,16,128,2048 }; |
1254 | /* 2^(((x+2)^2-(x+2))/2+1) */ |
1255 | |
1256 | if (unlimited) *pre = *res = 0; |
1257 | else { |
1258 | if (*pcr > 0) { |
1259 | int div; |
1260 | |
1261 | for (*pre = 0; *pre < 3; (*pre)++) |
1262 | if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; |
1263 | div = pre_div[*pre]**pcr; |
1264 | DPRINTK("min div %d\n" ,div); |
1265 | *res = TS_CLOCK/div-1; |
1266 | } |
1267 | else { |
1268 | int div; |
1269 | |
1270 | if (!*pcr) *pcr = eni_dev->tx_bw+reserved; |
1271 | for (*pre = 3; *pre >= 0; (*pre)--) |
1272 | if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; |
1273 | if (*pre < 3) (*pre)++; /* else fail later */ |
1274 | div = pre_div[*pre]*-*pcr; |
1275 | DPRINTK("max div %d\n" ,div); |
1276 | *res = DIV_ROUND_UP(TS_CLOCK, div)-1; |
1277 | } |
1278 | if (*res < 0) *res = 0; |
1279 | if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; |
1280 | } |
1281 | *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); |
1282 | DPRINTK("out pcr: %d (%d:%d)\n" ,*pcr,*pre,*res); |
1283 | return 0; |
1284 | } |
1285 | |
1286 | |
1287 | static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, |
1288 | int set_rsv,int set_shp) |
1289 | { |
1290 | struct eni_dev *eni_dev = ENI_DEV(vcc->dev); |
1291 | struct eni_vcc *eni_vcc = ENI_VCC(vcc); |
1292 | struct eni_tx *tx; |
1293 | unsigned long size; |
1294 | void __iomem *mem; |
1295 | int rate,ubr,unlimited,new_tx; |
1296 | int pre,res,order; |
1297 | int error; |
1298 | |
1299 | rate = atm_pcr_goal(tp: txtp); |
1300 | ubr = txtp->traffic_class == ATM_UBR; |
1301 | unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || |
1302 | rate >= ATM_OC3_PCR); |
1303 | if (!unlimited) { |
1304 | size = txtp->max_sdu*eni_dev->tx_mult/100; |
1305 | if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= |
1306 | MID_MAX_BUF_SIZE) |
1307 | size = MID_MAX_BUF_SIZE; |
1308 | } |
1309 | else { |
1310 | if (eni_dev->ubr) { |
1311 | eni_vcc->tx = eni_dev->ubr; |
1312 | txtp->pcr = ATM_OC3_PCR; |
1313 | return 0; |
1314 | } |
1315 | size = UBR_BUFFER; |
1316 | } |
1317 | new_tx = !eni_vcc->tx; |
1318 | mem = NULL; /* for gcc */ |
1319 | if (!new_tx) tx = eni_vcc->tx; |
1320 | else { |
1321 | mem = eni_alloc_mem(eni_dev,size: &size); |
1322 | if (!mem) return -ENOBUFS; |
1323 | tx = alloc_tx(eni_dev,ubr: unlimited); |
1324 | if (!tx) { |
1325 | eni_free_mem(eni_dev,start: mem,size); |
1326 | return -EBUSY; |
1327 | } |
1328 | DPRINTK("got chan %d\n" ,tx->index); |
1329 | tx->reserved = tx->shaping = 0; |
1330 | tx->send = mem; |
1331 | tx->words = size >> 2; |
1332 | skb_queue_head_init(list: &tx->backlog); |
1333 | for (order = 0; size > (1 << (order+10)); order++); |
1334 | eni_out((order << MID_SIZE_SHIFT) | |
1335 | ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), |
1336 | MID_TX_PLACE(tx->index)); |
1337 | tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & |
1338 | MID_DESCR_START; |
1339 | } |
1340 | error = comp_tx(eni_dev,pcr: &rate,reserved: tx->reserved,pre: &pre,res: &res,unlimited); |
1341 | if (!error && txtp->min_pcr > rate) error = -EINVAL; |
1342 | if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && |
1343 | txtp->max_pcr < rate) error = -EINVAL; |
1344 | if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) |
1345 | error = -EINVAL; |
1346 | if (!error && set_rsv && !set_shp && rate < tx->shaping) |
1347 | error = -EINVAL; |
1348 | if (!error && !set_rsv && rate > tx->reserved && !ubr) |
1349 | error = -EINVAL; |
1350 | if (error) { |
1351 | if (new_tx) { |
1352 | tx->send = NULL; |
1353 | eni_free_mem(eni_dev,start: mem,size); |
1354 | } |
1355 | return error; |
1356 | } |
1357 | txtp->pcr = rate; |
1358 | if (set_rsv && !ubr) { |
1359 | eni_dev->tx_bw += tx->reserved; |
1360 | tx->reserved = rate; |
1361 | eni_dev->tx_bw -= rate; |
1362 | } |
1363 | if (set_shp || (unlimited && new_tx)) { |
1364 | if (unlimited && new_tx) eni_dev->ubr = tx; |
1365 | tx->prescaler = pre; |
1366 | tx->resolution = res; |
1367 | tx->shaping = rate; |
1368 | } |
1369 | if (set_shp) eni_vcc->tx = tx; |
1370 | DPRINTK("rsv %d shp %d\n" ,tx->reserved,tx->shaping); |
1371 | return 0; |
1372 | } |
1373 | |
1374 | |
1375 | static int open_tx_first(struct atm_vcc *vcc) |
1376 | { |
1377 | ENI_VCC(vcc)->tx = NULL; |
1378 | if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; |
1379 | ENI_VCC(vcc)->txing = 0; |
1380 | return reserve_or_set_tx(vcc,txtp: &vcc->qos.txtp,set_rsv: 1,set_shp: 1); |
1381 | } |
1382 | |
1383 | |
1384 | static int open_tx_second(struct atm_vcc *vcc) |
1385 | { |
1386 | return 0; /* nothing to do */ |
1387 | } |
1388 | |
1389 | |
1390 | static void close_tx(struct atm_vcc *vcc) |
1391 | { |
1392 | DECLARE_WAITQUEUE(wait,current); |
1393 | struct eni_dev *eni_dev; |
1394 | struct eni_vcc *eni_vcc; |
1395 | |
1396 | eni_vcc = ENI_VCC(vcc); |
1397 | if (!eni_vcc->tx) return; |
1398 | eni_dev = ENI_DEV(vcc->dev); |
1399 | /* wait for TX queue to drain */ |
1400 | DPRINTK("eni_close: waiting for TX ...\n" ); |
1401 | add_wait_queue(wq_head: &eni_dev->tx_wait,wq_entry: &wait); |
1402 | set_current_state(TASK_UNINTERRUPTIBLE); |
1403 | for (;;) { |
1404 | int txing; |
1405 | |
1406 | tasklet_disable(t: &eni_dev->task); |
1407 | txing = skb_peek(list_: &eni_vcc->tx->backlog) || eni_vcc->txing; |
1408 | tasklet_enable(t: &eni_dev->task); |
1409 | if (!txing) break; |
1410 | DPRINTK("%d TX left\n" ,eni_vcc->txing); |
1411 | schedule(); |
1412 | set_current_state(TASK_UNINTERRUPTIBLE); |
1413 | } |
1414 | set_current_state(TASK_RUNNING); |
1415 | remove_wait_queue(wq_head: &eni_dev->tx_wait,wq_entry: &wait); |
1416 | if (eni_vcc->tx != eni_dev->ubr) { |
1417 | /* |
1418 | * Looping a few times in here is probably far cheaper than |
1419 | * keeping track of TX completions all the time, so let's poll |
1420 | * a bit ... |
1421 | */ |
1422 | while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != |
1423 | eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) |
1424 | schedule(); |
1425 | eni_free_mem(eni_dev,start: eni_vcc->tx->send,size: eni_vcc->tx->words << 2); |
1426 | eni_vcc->tx->send = NULL; |
1427 | eni_dev->tx_bw += eni_vcc->tx->reserved; |
1428 | } |
1429 | eni_vcc->tx = NULL; |
1430 | } |
1431 | |
1432 | |
1433 | static int start_tx(struct atm_dev *dev) |
1434 | { |
1435 | struct eni_dev *eni_dev; |
1436 | int i; |
1437 | |
1438 | eni_dev = ENI_DEV(dev); |
1439 | eni_dev->lost = 0; |
1440 | eni_dev->tx_bw = ATM_OC3_PCR; |
1441 | eni_dev->tx_mult = DEFAULT_TX_MULT; |
1442 | init_waitqueue_head(&eni_dev->tx_wait); |
1443 | eni_dev->ubr = NULL; |
1444 | skb_queue_head_init(list: &eni_dev->tx_queue); |
1445 | eni_out(0,MID_DMA_WR_TX); |
1446 | for (i = 0; i < NR_CHAN; i++) { |
1447 | eni_dev->tx[i].send = NULL; |
1448 | eni_dev->tx[i].index = i; |
1449 | } |
1450 | return 0; |
1451 | } |
1452 | |
1453 | |
1454 | /*--------------------------------- common ----------------------------------*/ |
1455 | |
1456 | |
1457 | #if 0 /* may become useful again when tuning things */ |
1458 | |
1459 | static void foo(void) |
1460 | { |
1461 | printk(KERN_INFO |
1462 | "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" |
1463 | "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n" , |
1464 | tx_complete,dma_complete,queued,requeued,submitted,backlogged, |
1465 | rx_enqueued,rx_dequeued,putting,pushed); |
1466 | if (eni_boards) printk(KERN_INFO "loss: %ld\n" ,ENI_DEV(eni_boards)->lost); |
1467 | } |
1468 | |
1469 | #endif |
1470 | |
1471 | |
1472 | static void bug_int(struct atm_dev *dev,unsigned long reason) |
1473 | { |
1474 | DPRINTK(">bug_int\n" ); |
1475 | if (reason & MID_DMA_ERR_ACK) |
1476 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " |
1477 | "error\n" ,dev->number); |
1478 | if (reason & MID_TX_IDENT_MISM) |
1479 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " |
1480 | "mismatch\n" ,dev->number); |
1481 | if (reason & MID_TX_DMA_OVFL) |
1482 | printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " |
1483 | "overflow\n" ,dev->number); |
1484 | EVENT(s: "---dump ends here---\n" ,a: 0,b: 0); |
1485 | printk(KERN_NOTICE "---recent events---\n" ); |
1486 | event_dump(); |
1487 | } |
1488 | |
1489 | |
1490 | static irqreturn_t eni_int(int irq,void *dev_id) |
1491 | { |
1492 | struct atm_dev *dev; |
1493 | struct eni_dev *eni_dev; |
1494 | u32 reason; |
1495 | |
1496 | DPRINTK(">eni_int\n" ); |
1497 | dev = dev_id; |
1498 | eni_dev = ENI_DEV(dev); |
1499 | reason = eni_in(MID_ISA); |
1500 | DPRINTK(DEV_LABEL ": int 0x%lx\n" ,(unsigned long) reason); |
1501 | /* |
1502 | * Must handle these two right now, because reading ISA doesn't clear |
1503 | * them, so they re-occur and we never make it to the tasklet. Since |
1504 | * they're rare, we don't mind the occasional invocation of eni_tasklet |
1505 | * with eni_dev->events == 0. |
1506 | */ |
1507 | if (reason & MID_STAT_OVFL) { |
1508 | EVENT(s: "stat overflow\n" ,a: 0,b: 0); |
1509 | eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; |
1510 | } |
1511 | if (reason & MID_SUNI_INT) { |
1512 | EVENT(s: "SUNI int\n" ,a: 0,b: 0); |
1513 | dev->phy->interrupt(dev); |
1514 | #if 0 |
1515 | foo(); |
1516 | #endif |
1517 | } |
1518 | spin_lock(lock: &eni_dev->lock); |
1519 | eni_dev->events |= reason; |
1520 | spin_unlock(lock: &eni_dev->lock); |
1521 | tasklet_schedule(t: &eni_dev->task); |
1522 | return IRQ_HANDLED; |
1523 | } |
1524 | |
1525 | |
1526 | static void eni_tasklet(unsigned long data) |
1527 | { |
1528 | struct atm_dev *dev = (struct atm_dev *) data; |
1529 | struct eni_dev *eni_dev = ENI_DEV(dev); |
1530 | unsigned long flags; |
1531 | u32 events; |
1532 | |
1533 | DPRINTK("eni_tasklet (dev %p)\n" ,dev); |
1534 | spin_lock_irqsave(&eni_dev->lock,flags); |
1535 | events = xchg(&eni_dev->events,0); |
1536 | spin_unlock_irqrestore(lock: &eni_dev->lock,flags); |
1537 | if (events & MID_RX_DMA_COMPLETE) { |
1538 | EVENT(s: "INT: RX DMA complete, starting dequeue_rx\n" ,a: 0,b: 0); |
1539 | dequeue_rx(dev); |
1540 | EVENT(s: "dequeue_rx done, starting poll_rx\n" ,a: 0,b: 0); |
1541 | poll_rx(dev); |
1542 | EVENT(s: "poll_rx done\n" ,a: 0,b: 0); |
1543 | /* poll_tx ? */ |
1544 | } |
1545 | if (events & MID_SERVICE) { |
1546 | EVENT(s: "INT: service, starting get_service\n" ,a: 0,b: 0); |
1547 | get_service(dev); |
1548 | EVENT(s: "get_service done, starting poll_rx\n" ,a: 0,b: 0); |
1549 | poll_rx(dev); |
1550 | EVENT(s: "poll_rx done\n" ,a: 0,b: 0); |
1551 | } |
1552 | if (events & MID_TX_DMA_COMPLETE) { |
1553 | EVENT(s: "INT: TX DMA COMPLETE\n" ,a: 0,b: 0); |
1554 | dequeue_tx(dev); |
1555 | } |
1556 | if (events & MID_TX_COMPLETE) { |
1557 | EVENT(s: "INT: TX COMPLETE\n" ,a: 0,b: 0); |
1558 | tx_complete++; |
1559 | wake_up(&eni_dev->tx_wait); |
1560 | /* poll_rx ? */ |
1561 | } |
1562 | if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { |
1563 | EVENT(s: "bug interrupt\n" ,a: 0,b: 0); |
1564 | bug_int(dev,reason: events); |
1565 | } |
1566 | poll_tx(dev); |
1567 | } |
1568 | |
1569 | |
1570 | /*--------------------------------- entries ---------------------------------*/ |
1571 | |
1572 | |
1573 | static char * const media_name[] = { |
1574 | "MMF" , "SMF" , "MMF" , "03?" , /* 0- 3 */ |
1575 | "UTP" , "05?" , "06?" , "07?" , /* 4- 7 */ |
1576 | "TAXI" ,"09?" , "10?" , "11?" , /* 8-11 */ |
1577 | "12?" , "13?" , "14?" , "15?" , /* 12-15 */ |
1578 | "MMF" , "SMF" , "18?" , "19?" , /* 16-19 */ |
1579 | "UTP" , "21?" , "22?" , "23?" , /* 20-23 */ |
1580 | "24?" , "25?" , "26?" , "27?" , /* 24-27 */ |
1581 | "28?" , "29?" , "30?" , "31?" /* 28-31 */ |
1582 | }; |
1583 | |
1584 | |
1585 | #define SET_SEPROM \ |
1586 | ({ if (!error && !pci_error) { \ |
1587 | pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ |
1588 | udelay(10); /* 10 usecs */ \ |
1589 | } }) |
1590 | #define GET_SEPROM \ |
1591 | ({ if (!error && !pci_error) { \ |
1592 | pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ |
1593 | udelay(10); /* 10 usecs */ \ |
1594 | } }) |
1595 | |
1596 | |
1597 | static int get_esi_asic(struct atm_dev *dev) |
1598 | { |
1599 | struct eni_dev *eni_dev; |
1600 | unsigned char tonga; |
1601 | int error,failed,pci_error; |
1602 | int address,i,j; |
1603 | |
1604 | eni_dev = ENI_DEV(dev); |
1605 | error = pci_error = 0; |
1606 | tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; |
1607 | SET_SEPROM; |
1608 | for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { |
1609 | /* start operation */ |
1610 | tonga |= SEPROM_DATA; |
1611 | SET_SEPROM; |
1612 | tonga |= SEPROM_CLK; |
1613 | SET_SEPROM; |
1614 | tonga &= ~SEPROM_DATA; |
1615 | SET_SEPROM; |
1616 | tonga &= ~SEPROM_CLK; |
1617 | SET_SEPROM; |
1618 | /* send address */ |
1619 | address = ((i+SEPROM_ESI_BASE) << 1)+1; |
1620 | for (j = 7; j >= 0; j--) { |
1621 | tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : |
1622 | tonga & ~SEPROM_DATA; |
1623 | SET_SEPROM; |
1624 | tonga |= SEPROM_CLK; |
1625 | SET_SEPROM; |
1626 | tonga &= ~SEPROM_CLK; |
1627 | SET_SEPROM; |
1628 | } |
1629 | /* get ack */ |
1630 | tonga |= SEPROM_DATA; |
1631 | SET_SEPROM; |
1632 | tonga |= SEPROM_CLK; |
1633 | SET_SEPROM; |
1634 | GET_SEPROM; |
1635 | failed = tonga & SEPROM_DATA; |
1636 | tonga &= ~SEPROM_CLK; |
1637 | SET_SEPROM; |
1638 | tonga |= SEPROM_DATA; |
1639 | SET_SEPROM; |
1640 | if (failed) error = -EIO; |
1641 | else { |
1642 | dev->esi[i] = 0; |
1643 | for (j = 7; j >= 0; j--) { |
1644 | dev->esi[i] <<= 1; |
1645 | tonga |= SEPROM_DATA; |
1646 | SET_SEPROM; |
1647 | tonga |= SEPROM_CLK; |
1648 | SET_SEPROM; |
1649 | GET_SEPROM; |
1650 | if (tonga & SEPROM_DATA) dev->esi[i] |= 1; |
1651 | tonga &= ~SEPROM_CLK; |
1652 | SET_SEPROM; |
1653 | tonga |= SEPROM_DATA; |
1654 | SET_SEPROM; |
1655 | } |
1656 | /* get ack */ |
1657 | tonga |= SEPROM_DATA; |
1658 | SET_SEPROM; |
1659 | tonga |= SEPROM_CLK; |
1660 | SET_SEPROM; |
1661 | GET_SEPROM; |
1662 | if (!(tonga & SEPROM_DATA)) error = -EIO; |
1663 | tonga &= ~SEPROM_CLK; |
1664 | SET_SEPROM; |
1665 | tonga |= SEPROM_DATA; |
1666 | SET_SEPROM; |
1667 | } |
1668 | /* stop operation */ |
1669 | tonga &= ~SEPROM_DATA; |
1670 | SET_SEPROM; |
1671 | tonga |= SEPROM_CLK; |
1672 | SET_SEPROM; |
1673 | tonga |= SEPROM_DATA; |
1674 | SET_SEPROM; |
1675 | } |
1676 | if (pci_error) { |
1677 | printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " |
1678 | "(0x%02x)\n" ,dev->number,pci_error); |
1679 | error = -EIO; |
1680 | } |
1681 | return error; |
1682 | } |
1683 | |
1684 | |
1685 | #undef SET_SEPROM |
1686 | #undef GET_SEPROM |
1687 | |
1688 | |
1689 | static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) |
1690 | { |
1691 | void __iomem *mac_base; |
1692 | int i; |
1693 | |
1694 | mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); |
1695 | for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(addr: mac_base+(i^3)); |
1696 | return 0; |
1697 | } |
1698 | |
1699 | |
1700 | static int eni_do_init(struct atm_dev *dev) |
1701 | { |
1702 | struct midway_eprom __iomem *eprom; |
1703 | struct eni_dev *eni_dev; |
1704 | struct pci_dev *pci_dev; |
1705 | unsigned long real_base; |
1706 | void __iomem *base; |
1707 | int error,i,last; |
1708 | |
1709 | DPRINTK(">eni_init\n" ); |
1710 | dev->ci_range.vpi_bits = 0; |
1711 | dev->ci_range.vci_bits = NR_VCI_LD; |
1712 | dev->link_rate = ATM_OC3_PCR; |
1713 | eni_dev = ENI_DEV(dev); |
1714 | pci_dev = eni_dev->pci_dev; |
1715 | real_base = pci_resource_start(pci_dev, 0); |
1716 | eni_dev->irq = pci_dev->irq; |
1717 | if ((error = pci_write_config_word(dev: pci_dev,PCI_COMMAND, |
1718 | PCI_COMMAND_MEMORY | |
1719 | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { |
1720 | printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " |
1721 | "(0x%02x)\n" ,dev->number,error); |
1722 | return -EIO; |
1723 | } |
1724 | printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d," , |
1725 | dev->number,pci_dev->revision,real_base,eni_dev->irq); |
1726 | if (!(base = ioremap(offset: real_base,MAP_MAX_SIZE))) { |
1727 | printk("\n" ); |
1728 | printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " |
1729 | "mapping\n" ,dev->number); |
1730 | return -ENOMEM; |
1731 | } |
1732 | eni_dev->ioaddr = base; |
1733 | eni_dev->base_diff = real_base - (unsigned long) base; |
1734 | /* id may not be present in ASIC Tonga boards - check this @@@ */ |
1735 | if (!eni_dev->asic) { |
1736 | eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); |
1737 | if (readl(addr: &eprom->magic) != ENI155_MAGIC) { |
1738 | printk("\n" ); |
1739 | printk(KERN_ERR DEV_LABEL |
1740 | "(itf %d): bad magic - expected 0x%x, got 0x%x\n" , |
1741 | dev->number, ENI155_MAGIC, |
1742 | (unsigned)readl(&eprom->magic)); |
1743 | error = -EINVAL; |
1744 | goto unmap; |
1745 | } |
1746 | } |
1747 | eni_dev->phy = base+PHY_BASE; |
1748 | eni_dev->reg = base+REG_BASE; |
1749 | eni_dev->ram = base+RAM_BASE; |
1750 | last = MAP_MAX_SIZE-RAM_BASE; |
1751 | for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { |
1752 | writel(val: 0x55555555,addr: eni_dev->ram+i); |
1753 | if (readl(addr: eni_dev->ram+i) != 0x55555555) last = i; |
1754 | else { |
1755 | writel(val: 0xAAAAAAAA,addr: eni_dev->ram+i); |
1756 | if (readl(addr: eni_dev->ram+i) != 0xAAAAAAAA) last = i; |
1757 | else writel(val: i,addr: eni_dev->ram+i); |
1758 | } |
1759 | } |
1760 | for (i = 0; i < last; i += RAM_INCREMENT) |
1761 | if (readl(addr: eni_dev->ram+i) != i) break; |
1762 | eni_dev->mem = i; |
1763 | memset_io(eni_dev->ram,0,eni_dev->mem); |
1764 | /* TODO: should shrink allocation now */ |
1765 | printk("mem=%dkB (" ,eni_dev->mem >> 10); |
1766 | /* TODO: check for non-SUNI, check for TAXI ? */ |
1767 | if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { |
1768 | printk(")\n" ); |
1769 | printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n" , |
1770 | dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); |
1771 | error = -EINVAL; |
1772 | goto unmap; |
1773 | } |
1774 | error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); |
1775 | if (error) |
1776 | goto unmap; |
1777 | for (i = 0; i < ESI_LEN; i++) |
1778 | printk("%s%02X" ,i ? "-" : "" ,dev->esi[i]); |
1779 | printk(")\n" ); |
1780 | printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n" ,dev->number, |
1781 | eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA" , |
1782 | media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); |
1783 | |
1784 | error = suni_init(dev); |
1785 | if (error) |
1786 | goto unmap; |
1787 | out: |
1788 | return error; |
1789 | unmap: |
1790 | iounmap(addr: base); |
1791 | goto out; |
1792 | } |
1793 | |
1794 | static void eni_do_release(struct atm_dev *dev) |
1795 | { |
1796 | struct eni_dev *ed = ENI_DEV(dev); |
1797 | |
1798 | dev->phy->stop(dev); |
1799 | dev->phy = NULL; |
1800 | iounmap(addr: ed->ioaddr); |
1801 | } |
1802 | |
1803 | static int eni_start(struct atm_dev *dev) |
1804 | { |
1805 | struct eni_dev *eni_dev; |
1806 | |
1807 | void __iomem *buf; |
1808 | unsigned long buffer_mem; |
1809 | int error; |
1810 | |
1811 | DPRINTK(">eni_start\n" ); |
1812 | eni_dev = ENI_DEV(dev); |
1813 | if (request_irq(irq: eni_dev->irq,handler: &eni_int,IRQF_SHARED,DEV_LABEL,dev)) { |
1814 | printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n" , |
1815 | dev->number,eni_dev->irq); |
1816 | error = -EAGAIN; |
1817 | goto out; |
1818 | } |
1819 | pci_set_master(dev: eni_dev->pci_dev); |
1820 | if ((error = pci_write_config_word(dev: eni_dev->pci_dev,PCI_COMMAND, |
1821 | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | |
1822 | (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { |
1823 | printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" |
1824 | "master (0x%02x)\n" ,dev->number,error); |
1825 | goto free_irq; |
1826 | } |
1827 | if ((error = pci_write_config_byte(dev: eni_dev->pci_dev,PCI_TONGA_CTRL, |
1828 | END_SWAP_DMA))) { |
1829 | printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " |
1830 | "(0x%02x)\n" ,dev->number,error); |
1831 | goto free_irq; |
1832 | } |
1833 | /* determine addresses of internal tables */ |
1834 | eni_dev->vci = eni_dev->ram; |
1835 | eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; |
1836 | eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; |
1837 | eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; |
1838 | buf = eni_dev->service+NR_SERVICE*4; |
1839 | DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n" , |
1840 | eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, |
1841 | eni_dev->service,buf); |
1842 | spin_lock_init(&eni_dev->lock); |
1843 | tasklet_init(t: &eni_dev->task,func: eni_tasklet,data: (unsigned long) dev); |
1844 | eni_dev->events = 0; |
1845 | /* initialize memory management */ |
1846 | buffer_mem = eni_dev->mem - (buf - eni_dev->ram); |
1847 | eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; |
1848 | eni_dev->free_list = kmalloc_array(n: eni_dev->free_list_size + 1, |
1849 | size: sizeof(*eni_dev->free_list), |
1850 | GFP_KERNEL); |
1851 | if (!eni_dev->free_list) { |
1852 | printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n" , |
1853 | dev->number); |
1854 | error = -ENOMEM; |
1855 | goto free_irq; |
1856 | } |
1857 | eni_dev->free_len = 0; |
1858 | eni_put_free(eni_dev,start: buf,size: buffer_mem); |
1859 | memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ |
1860 | /* |
1861 | * byte_addr free (k) |
1862 | * 0x00000000 512 VCI table |
1863 | * 0x00004000 496 RX DMA |
1864 | * 0x00005000 492 TX DMA |
1865 | * 0x00006000 488 service list |
1866 | * 0x00007000 484 buffers |
1867 | * 0x00080000 0 end (512kB) |
1868 | */ |
1869 | eni_out(0xffffffff,MID_IE); |
1870 | error = start_tx(dev); |
1871 | if (error) goto free_list; |
1872 | error = start_rx(dev); |
1873 | if (error) goto free_list; |
1874 | error = dev->phy->start(dev); |
1875 | if (error) goto free_list; |
1876 | eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | |
1877 | MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, |
1878 | MID_MC_S); |
1879 | /* Tonga uses SBus INTReq1 */ |
1880 | (void) eni_in(MID_ISA); /* clear Midway interrupts */ |
1881 | return 0; |
1882 | |
1883 | free_list: |
1884 | kfree(objp: eni_dev->free_list); |
1885 | |
1886 | free_irq: |
1887 | free_irq(eni_dev->irq, dev); |
1888 | |
1889 | out: |
1890 | return error; |
1891 | } |
1892 | |
1893 | |
1894 | static void eni_close(struct atm_vcc *vcc) |
1895 | { |
1896 | DPRINTK(">eni_close\n" ); |
1897 | if (!ENI_VCC(vcc)) return; |
1898 | clear_bit(nr: ATM_VF_READY,addr: &vcc->flags); |
1899 | close_rx(vcc); |
1900 | close_tx(vcc); |
1901 | DPRINTK("eni_close: done waiting\n" ); |
1902 | /* deallocate memory */ |
1903 | kfree(ENI_VCC(vcc)); |
1904 | vcc->dev_data = NULL; |
1905 | clear_bit(nr: ATM_VF_ADDR,addr: &vcc->flags); |
1906 | /*foo();*/ |
1907 | } |
1908 | |
1909 | |
1910 | static int eni_open(struct atm_vcc *vcc) |
1911 | { |
1912 | struct eni_vcc *eni_vcc; |
1913 | int error; |
1914 | short vpi = vcc->vpi; |
1915 | int vci = vcc->vci; |
1916 | |
1917 | DPRINTK(">eni_open\n" ); |
1918 | EVENT(s: "eni_open\n" ,a: 0,b: 0); |
1919 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) |
1920 | vcc->dev_data = NULL; |
1921 | if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) |
1922 | set_bit(nr: ATM_VF_ADDR,addr: &vcc->flags); |
1923 | if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) |
1924 | return -EINVAL; |
1925 | DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n" ,vcc->dev->number,vcc->vpi, |
1926 | vcc->vci); |
1927 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { |
1928 | eni_vcc = kmalloc(size: sizeof(struct eni_vcc),GFP_KERNEL); |
1929 | if (!eni_vcc) return -ENOMEM; |
1930 | vcc->dev_data = eni_vcc; |
1931 | eni_vcc->tx = NULL; /* for eni_close after open_rx */ |
1932 | if ((error = open_rx_first(vcc))) { |
1933 | eni_close(vcc); |
1934 | return error; |
1935 | } |
1936 | if ((error = open_tx_first(vcc))) { |
1937 | eni_close(vcc); |
1938 | return error; |
1939 | } |
1940 | } |
1941 | if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; |
1942 | if ((error = open_rx_second(vcc))) { |
1943 | eni_close(vcc); |
1944 | return error; |
1945 | } |
1946 | if ((error = open_tx_second(vcc))) { |
1947 | eni_close(vcc); |
1948 | return error; |
1949 | } |
1950 | set_bit(nr: ATM_VF_READY,addr: &vcc->flags); |
1951 | /* should power down SUNI while !ref_count @@@ */ |
1952 | return 0; |
1953 | } |
1954 | |
1955 | |
1956 | static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) |
1957 | { |
1958 | struct eni_dev *eni_dev = ENI_DEV(vcc->dev); |
1959 | struct eni_tx *tx = ENI_VCC(vcc)->tx; |
1960 | struct sk_buff *skb; |
1961 | int error,rate,rsv,shp; |
1962 | |
1963 | if (qos->txtp.traffic_class == ATM_NONE) return 0; |
1964 | if (tx == eni_dev->ubr) return -EBADFD; |
1965 | rate = atm_pcr_goal(tp: &qos->txtp); |
1966 | if (rate < 0) rate = -rate; |
1967 | rsv = shp = 0; |
1968 | if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; |
1969 | if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; |
1970 | if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; |
1971 | if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; |
1972 | if (!rsv && !shp) return 0; |
1973 | error = reserve_or_set_tx(vcc,txtp: &qos->txtp,set_rsv: rsv,set_shp: shp); |
1974 | if (error) return error; |
1975 | if (shp && !(flgs & ATM_MF_IMMED)) return 0; |
1976 | /* |
1977 | * Walk through the send buffer and patch the rate information in all |
1978 | * segmentation buffer descriptors of this VCC. |
1979 | */ |
1980 | tasklet_disable(t: &eni_dev->task); |
1981 | skb_queue_walk(&eni_dev->tx_queue, skb) { |
1982 | void __iomem *dsc; |
1983 | |
1984 | if (ATM_SKB(skb)->vcc != vcc) continue; |
1985 | dsc = tx->send+ENI_PRV_POS(skb)*4; |
1986 | writel(val: (readl(addr: dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | |
1987 | (tx->prescaler << MID_SEG_PR_SHIFT) | |
1988 | (tx->resolution << MID_SEG_RATE_SHIFT), addr: dsc); |
1989 | } |
1990 | tasklet_enable(t: &eni_dev->task); |
1991 | return 0; |
1992 | } |
1993 | |
1994 | |
1995 | static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) |
1996 | { |
1997 | struct eni_dev *eni_dev = ENI_DEV(dev); |
1998 | |
1999 | if (cmd == ENI_MEMDUMP) { |
2000 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
2001 | printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " |
2002 | "instead of obsolete ioctl ENI_MEMDUMP\n" ,dev->number); |
2003 | dump(dev); |
2004 | return 0; |
2005 | } |
2006 | if (cmd == ENI_SETMULT) { |
2007 | struct eni_multipliers mult; |
2008 | |
2009 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
2010 | if (copy_from_user(to: &mult, from: arg, |
2011 | n: sizeof(struct eni_multipliers))) |
2012 | return -EFAULT; |
2013 | if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || |
2014 | mult.tx > 65536 || mult.rx > 65536) |
2015 | return -EINVAL; |
2016 | if (mult.tx) eni_dev->tx_mult = mult.tx; |
2017 | if (mult.rx) eni_dev->rx_mult = mult.rx; |
2018 | return 0; |
2019 | } |
2020 | if (cmd == ATM_SETCIRANGE) { |
2021 | struct atm_cirange ci; |
2022 | |
2023 | if (copy_from_user(to: &ci, from: arg,n: sizeof(struct atm_cirange))) |
2024 | return -EFAULT; |
2025 | if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && |
2026 | (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) |
2027 | return 0; |
2028 | return -EINVAL; |
2029 | } |
2030 | if (!dev->phy->ioctl) return -ENOIOCTLCMD; |
2031 | return dev->phy->ioctl(dev,cmd,arg); |
2032 | } |
2033 | |
2034 | static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) |
2035 | { |
2036 | enum enq_res res; |
2037 | |
2038 | DPRINTK(">eni_send\n" ); |
2039 | if (!ENI_VCC(vcc)->tx) { |
2040 | if (vcc->pop) vcc->pop(vcc,skb); |
2041 | else dev_kfree_skb(skb); |
2042 | return -EINVAL; |
2043 | } |
2044 | if (!skb) { |
2045 | printk(KERN_CRIT "!skb in eni_send ?\n" ); |
2046 | if (vcc->pop) vcc->pop(vcc,skb); |
2047 | return -EINVAL; |
2048 | } |
2049 | if (vcc->qos.aal == ATM_AAL0) { |
2050 | if (skb->len != ATM_CELL_SIZE-1) { |
2051 | if (vcc->pop) vcc->pop(vcc,skb); |
2052 | else dev_kfree_skb(skb); |
2053 | return -EINVAL; |
2054 | } |
2055 | *(u32 *) skb->data = htonl(*(u32 *) skb->data); |
2056 | } |
2057 | submitted++; |
2058 | ATM_SKB(skb)->vcc = vcc; |
2059 | tasklet_disable_in_atomic(t: &ENI_DEV(vcc->dev)->task); |
2060 | res = do_tx(skb); |
2061 | tasklet_enable(t: &ENI_DEV(vcc->dev)->task); |
2062 | if (res == enq_ok) return 0; |
2063 | skb_queue_tail(list: &ENI_VCC(vcc)->tx->backlog,newsk: skb); |
2064 | backlogged++; |
2065 | tasklet_schedule(t: &ENI_DEV(vcc->dev)->task); |
2066 | return 0; |
2067 | } |
2068 | |
2069 | static void eni_phy_put(struct atm_dev *dev,unsigned char value, |
2070 | unsigned long addr) |
2071 | { |
2072 | writel(val: value,ENI_DEV(dev)->phy+addr*4); |
2073 | } |
2074 | |
2075 | |
2076 | |
2077 | static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) |
2078 | { |
2079 | return readl(ENI_DEV(dev)->phy+addr*4); |
2080 | } |
2081 | |
2082 | |
2083 | static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) |
2084 | { |
2085 | struct sock *s; |
2086 | static const char *signal[] = { "LOST" ,"unknown" ,"okay" }; |
2087 | struct eni_dev *eni_dev = ENI_DEV(dev); |
2088 | struct atm_vcc *vcc; |
2089 | int left,i; |
2090 | |
2091 | left = *pos; |
2092 | if (!left) |
2093 | return sprintf(buf: page,DEV_LABEL "(itf %d) signal %s, %dkB, " |
2094 | "%d cps remaining\n" ,dev->number,signal[(int) dev->signal], |
2095 | eni_dev->mem >> 10,eni_dev->tx_bw); |
2096 | if (!--left) |
2097 | return sprintf(buf: page,fmt: "%4sBursts: TX" |
2098 | #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ |
2099 | !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ |
2100 | !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ |
2101 | !defined(CONFIG_ATM_ENI_BURST_TX_2W) |
2102 | " none" |
2103 | #endif |
2104 | #ifdef CONFIG_ATM_ENI_BURST_TX_16W |
2105 | " 16W" |
2106 | #endif |
2107 | #ifdef CONFIG_ATM_ENI_BURST_TX_8W |
2108 | " 8W" |
2109 | #endif |
2110 | #ifdef CONFIG_ATM_ENI_BURST_TX_4W |
2111 | " 4W" |
2112 | #endif |
2113 | #ifdef CONFIG_ATM_ENI_BURST_TX_2W |
2114 | " 2W" |
2115 | #endif |
2116 | ", RX" |
2117 | #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ |
2118 | !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ |
2119 | !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ |
2120 | !defined(CONFIG_ATM_ENI_BURST_RX_2W) |
2121 | " none" |
2122 | #endif |
2123 | #ifdef CONFIG_ATM_ENI_BURST_RX_16W |
2124 | " 16W" |
2125 | #endif |
2126 | #ifdef CONFIG_ATM_ENI_BURST_RX_8W |
2127 | " 8W" |
2128 | #endif |
2129 | #ifdef CONFIG_ATM_ENI_BURST_RX_4W |
2130 | " 4W" |
2131 | #endif |
2132 | #ifdef CONFIG_ATM_ENI_BURST_RX_2W |
2133 | " 2W" |
2134 | #endif |
2135 | #ifndef CONFIG_ATM_ENI_TUNE_BURST |
2136 | " (default)" |
2137 | #endif |
2138 | "\n" ,"" ); |
2139 | if (!--left) |
2140 | return sprintf(buf: page,fmt: "%4sBuffer multipliers: tx %d%%, rx %d%%\n" , |
2141 | "" ,eni_dev->tx_mult,eni_dev->rx_mult); |
2142 | for (i = 0; i < NR_CHAN; i++) { |
2143 | struct eni_tx *tx = eni_dev->tx+i; |
2144 | |
2145 | if (!tx->send) continue; |
2146 | if (!--left) { |
2147 | return sprintf(buf: page, fmt: "tx[%d]: 0x%lx-0x%lx " |
2148 | "(%6ld bytes), rsv %d cps, shp %d cps%s\n" ,i, |
2149 | (unsigned long) (tx->send - eni_dev->ram), |
2150 | tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, |
2151 | tx->reserved,tx->shaping, |
2152 | tx == eni_dev->ubr ? " (UBR)" : "" ); |
2153 | } |
2154 | if (--left) continue; |
2155 | return sprintf(buf: page,fmt: "%10sbacklog %u packets\n" ,"" , |
2156 | skb_queue_len(list_: &tx->backlog)); |
2157 | } |
2158 | read_lock(&vcc_sklist_lock); |
2159 | for(i = 0; i < VCC_HTABLE_SIZE; ++i) { |
2160 | struct hlist_head *head = &vcc_hash[i]; |
2161 | |
2162 | sk_for_each(s, head) { |
2163 | struct eni_vcc *eni_vcc; |
2164 | int length; |
2165 | |
2166 | vcc = atm_sk(sk: s); |
2167 | if (vcc->dev != dev) |
2168 | continue; |
2169 | eni_vcc = ENI_VCC(vcc); |
2170 | if (--left) continue; |
2171 | length = sprintf(buf: page,fmt: "vcc %4d: " ,vcc->vci); |
2172 | if (eni_vcc->rx) { |
2173 | length += sprintf(buf: page+length, fmt: "0x%lx-0x%lx " |
2174 | "(%6ld bytes)" , |
2175 | (unsigned long) (eni_vcc->recv - eni_dev->ram), |
2176 | eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, |
2177 | eni_vcc->words*4); |
2178 | if (eni_vcc->tx) length += sprintf(buf: page+length,fmt: ", " ); |
2179 | } |
2180 | if (eni_vcc->tx) |
2181 | length += sprintf(buf: page+length,fmt: "tx[%d], txing %d bytes" , |
2182 | eni_vcc->tx->index,eni_vcc->txing); |
2183 | page[length] = '\n'; |
2184 | read_unlock(&vcc_sklist_lock); |
2185 | return length+1; |
2186 | } |
2187 | } |
2188 | read_unlock(&vcc_sklist_lock); |
2189 | for (i = 0; i < eni_dev->free_len; i++) { |
2190 | struct eni_free *fe = eni_dev->free_list+i; |
2191 | unsigned long offset; |
2192 | |
2193 | if (--left) continue; |
2194 | offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; |
2195 | return sprintf(buf: page,fmt: "free %p-%p (%6d bytes)\n" , |
2196 | fe->start-offset,fe->start-offset+(1 << fe->order)-1, |
2197 | 1 << fe->order); |
2198 | } |
2199 | return 0; |
2200 | } |
2201 | |
2202 | |
2203 | static const struct atmdev_ops ops = { |
2204 | .open = eni_open, |
2205 | .close = eni_close, |
2206 | .ioctl = eni_ioctl, |
2207 | .send = eni_send, |
2208 | .phy_put = eni_phy_put, |
2209 | .phy_get = eni_phy_get, |
2210 | .change_qos = eni_change_qos, |
2211 | .proc_read = eni_proc_read |
2212 | }; |
2213 | |
2214 | |
2215 | static int eni_init_one(struct pci_dev *pci_dev, |
2216 | const struct pci_device_id *ent) |
2217 | { |
2218 | struct atm_dev *dev; |
2219 | struct eni_dev *eni_dev; |
2220 | struct eni_zero *zero; |
2221 | int rc; |
2222 | |
2223 | rc = pci_enable_device(dev: pci_dev); |
2224 | if (rc < 0) |
2225 | goto out; |
2226 | |
2227 | rc = dma_set_mask_and_coherent(dev: &pci_dev->dev, DMA_BIT_MASK(32)); |
2228 | if (rc < 0) |
2229 | goto err_disable; |
2230 | |
2231 | rc = -ENOMEM; |
2232 | eni_dev = kmalloc(size: sizeof(struct eni_dev), GFP_KERNEL); |
2233 | if (!eni_dev) |
2234 | goto err_disable; |
2235 | |
2236 | zero = &eni_dev->zero; |
2237 | zero->addr = dma_alloc_coherent(dev: &pci_dev->dev, |
2238 | ENI_ZEROES_SIZE, dma_handle: &zero->dma, GFP_KERNEL); |
2239 | if (!zero->addr) |
2240 | goto err_kfree; |
2241 | |
2242 | dev = atm_dev_register(DEV_LABEL, parent: &pci_dev->dev, ops: &ops, number: -1, NULL); |
2243 | if (!dev) |
2244 | goto err_free_consistent; |
2245 | |
2246 | dev->dev_data = eni_dev; |
2247 | pci_set_drvdata(pdev: pci_dev, data: dev); |
2248 | eni_dev->pci_dev = pci_dev; |
2249 | eni_dev->asic = ent->driver_data; |
2250 | |
2251 | rc = eni_do_init(dev); |
2252 | if (rc < 0) |
2253 | goto err_unregister; |
2254 | |
2255 | rc = eni_start(dev); |
2256 | if (rc < 0) |
2257 | goto err_eni_release; |
2258 | |
2259 | eni_dev->more = eni_boards; |
2260 | eni_boards = dev; |
2261 | out: |
2262 | return rc; |
2263 | |
2264 | err_eni_release: |
2265 | dev->phy = NULL; |
2266 | iounmap(ENI_DEV(dev)->ioaddr); |
2267 | err_unregister: |
2268 | atm_dev_deregister(dev); |
2269 | err_free_consistent: |
2270 | dma_free_coherent(dev: &pci_dev->dev, ENI_ZEROES_SIZE, cpu_addr: zero->addr, dma_handle: zero->dma); |
2271 | err_kfree: |
2272 | kfree(objp: eni_dev); |
2273 | err_disable: |
2274 | pci_disable_device(dev: pci_dev); |
2275 | goto out; |
2276 | } |
2277 | |
2278 | |
2279 | static const struct pci_device_id eni_pci_tbl[] = { |
2280 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, |
2281 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, |
2282 | { 0, } |
2283 | }; |
2284 | MODULE_DEVICE_TABLE(pci,eni_pci_tbl); |
2285 | |
2286 | |
2287 | static void eni_remove_one(struct pci_dev *pdev) |
2288 | { |
2289 | struct atm_dev *dev = pci_get_drvdata(pdev); |
2290 | struct eni_dev *ed = ENI_DEV(dev); |
2291 | struct eni_zero *zero = &ed->zero; |
2292 | |
2293 | eni_do_release(dev); |
2294 | atm_dev_deregister(dev); |
2295 | dma_free_coherent(dev: &pdev->dev, ENI_ZEROES_SIZE, cpu_addr: zero->addr, dma_handle: zero->dma); |
2296 | kfree(objp: ed); |
2297 | pci_disable_device(dev: pdev); |
2298 | } |
2299 | |
2300 | |
2301 | static struct pci_driver eni_driver = { |
2302 | .name = DEV_LABEL, |
2303 | .id_table = eni_pci_tbl, |
2304 | .probe = eni_init_one, |
2305 | .remove = eni_remove_one, |
2306 | }; |
2307 | |
2308 | |
2309 | static int __init eni_init(void) |
2310 | { |
2311 | struct sk_buff *skb; /* dummy for sizeof */ |
2312 | |
2313 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); |
2314 | return pci_register_driver(&eni_driver); |
2315 | } |
2316 | |
2317 | |
2318 | module_init(eni_init); |
2319 | /* @@@ since exit routine not defined, this module can not be unloaded */ |
2320 | |
2321 | MODULE_LICENSE("GPL" ); |
2322 | |