Commit | Line | Data |
---|---|---|
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 | ||
1da177e4 LT |
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) | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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; | |
3e73cc5c NC |
239 | for (order = 0; (1 << order) < *size; order++) |
240 | ; | |
1da177e4 LT |
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+*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("---dump ends here---\n",0,0); | |
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(&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) { | |
ede58ef2 C |
353 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
354 | DMA_FROM_DEVICE); | |
355 | if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) | |
54167558 | 356 | goto dma_map_error; |
1da177e4 LT |
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; | |
30780d08 | 371 | dma[j++] = 0; |
1da177e4 LT |
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("strange things happen ... (skip=%ld,eff=%ld)\n", | |
381 | size,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; | |
30780d08 | 444 | dma[j++] = 0; |
1da177e4 LT |
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(dma[i*2],eni_dev->rx_dma+dma_wr*8); | |
465 | writel(dma[i*2+1],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(&eni_dev->rx_queue,skb); | |
471 | eni_vcc->last = skb; | |
59c03699 | 472 | rx_enqueued++; |
1da177e4 LT |
473 | } |
474 | eni_vcc->descr = here; | |
475 | eni_out(dma_wr,MID_DMA_WR_RX); | |
476 | return 0; | |
477 | ||
478 | trouble: | |
479 | if (paddr) | |
ede58ef2 C |
480 | dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, |
481 | DMA_FROM_DEVICE); | |
54167558 | 482 | dma_map_error: |
1da177e4 LT |
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("discard (size=%ld)\n",size,0); | |
494 | while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); | |
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(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(&vcc->stats->rx_err); | |
525 | } | |
526 | else { | |
527 | length = ATM_CELL_SIZE-1; /* no HEC */ | |
528 | } | |
529 | skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; | |
530 | if (!skb) { | |
531 | discard(vcc,length >> 2); | |
532 | return 0; | |
533 | } | |
534 | skb_put(skb,length); | |
8570419f | 535 | skb->tstamp = eni_vcc->timestamp; |
1da177e4 LT |
536 | DPRINTK("got len %ld\n",length); |
537 | if (do_rx_dma(vcc,skb,1,length >> 2,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("rx_aal5\n",0,0); | |
551 | DPRINTK(">rx_aal5\n"); | |
552 | eni_vcc = ENI_VCC(vcc); | |
553 | descr = readl(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("empty cell (descr=0x%lx)\n",descr,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("CRC error (descr=0x%lx,size=%ld)\n",descr, | |
576 | size); | |
577 | } | |
578 | eff = length = 0; | |
579 | atomic_inc(&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(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("bad PDU (descr=0x08%lx,length=%ld)\n",descr, | |
591 | 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(&vcc->stats->rx_err); | |
597 | } | |
598 | } | |
599 | skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; | |
600 | if (!skb) { | |
601 | discard(vcc,size); | |
602 | return 0; | |
603 | } | |
604 | skb_put(skb,length); | |
605 | DPRINTK("got len %ld\n",length); | |
606 | if (do_rx_dma(vcc,skb,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("rx_vcc(1)\n",0,0); | |
621 | while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> | |
622 | MID_VCI_DESCR_SHIFT)) { | |
623 | EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", | |
624 | eni_vcc->descr,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(vci_dsc) & ~MID_VCI_IN_SERVICE,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("rx_vcc(3)\n",0,0); | |
638 | while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) | |
639 | >> MID_VCI_DESCR_SHIFT)) { | |
640 | EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", | |
641 | eni_vcc->descr,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("poll_rx.fast\n",0,0); | |
659 | if (rx_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("poll_rx.slow\n",0,0); | |
667 | if (rx_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(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("getting from service\n",0,0); | |
695 | if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { | |
696 | EVENT("double service\n",0,0); | |
697 | DPRINTK("Grr, servicing VCC %ld twice\n",vci); | |
698 | continue; | |
699 | } | |
8570419f | 700 | ENI_VCC(vcc)->timestamp = ktime_get_real(); |
1da177e4 LT |
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 | } | |
59c03699 | 714 | putting++; |
1da177e4 LT |
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(&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("nothing to dequeue\n",0,0); | |
738 | } | |
739 | break; | |
740 | } | |
741 | EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), | |
742 | ENI_PRV_POS(skb)); | |
59c03699 | 743 | rx_dequeued++; |
1da177e4 LT |
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("requeuing\n",0,0); | |
752 | skb_queue_head(&eni_dev->rx_queue,skb); | |
753 | break; | |
754 | } | |
755 | eni_vcc->rxing--; | |
756 | eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); | |
ede58ef2 C |
757 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
758 | DMA_TO_DEVICE); | |
1da177e4 LT |
759 | if (!skb->len) dev_kfree_skb_irq(skb); |
760 | else { | |
761 | EVENT("pushing (len=%ld)\n",skb->len,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(&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); | |
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(0,here+4); /* descr, read = 0 */ | |
822 | writel(0,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(((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),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((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << | |
849 | MID_VCI_MODE_SHIFT),here); | |
850 | /* wait for receiver to become idle */ | |
851 | udelay(27); | |
852 | /* discard pending cell */ | |
853 | writel(readl(here) & ~MID_VCI_IN_SERVICE,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("RX closing\n",0,0); | |
859 | add_wait_queue(&eni_dev->rx_wait,&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("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, | |
869 | 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(&eni_dev->task); | |
880 | tmp = readl(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(&eni_dev->task); | |
883 | if (at_end) break; | |
884 | EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", | |
885 | eni_vcc->rx_pos,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(&eni_dev->rx_wait,&wait); | |
893 | } | |
894 | eni_free_mem(eni_dev,eni_vcc->recv,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 | } | |
1da177e4 LT |
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(&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("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,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; | |
a45a9e8a | 1037 | unsigned char skb_data3; |
1da177e4 LT |
1038 | |
1039 | DPRINTK(">do_tx\n"); | |
1040 | NULLCHECK(skb); | |
1041 | EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,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 | } | |
a45a9e8a | 1112 | skb_data3 = skb->data[3]; |
ede58ef2 C |
1113 | paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, |
1114 | DMA_TO_DEVICE); | |
0f74b29a JJ |
1115 | if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) |
1116 | return enq_next; | |
1da177e4 LT |
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(tx->index,eni_dev->dma,&j,paddr,skb->len); | |
1126 | else put_dma(tx->index,eni_dev->dma,&j,paddr+4,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(tx->index,eni_dev->dma,&j,(unsigned long) | |
1132 | skb->data, | |
e743d313 | 1133 | skb_headlen(skb)); |
1da177e4 LT |
1134 | else |
1135 | put_dma(tx->index,eni_dev->dma,&j,(unsigned long) | |
c517202f | 1136 | skb_frag_page(&skb_shinfo(skb)->frags[i]) + |
b54c9d5b | 1137 | skb_frag_off(&skb_shinfo(skb)->frags[i]), |
9e903e08 | 1138 | skb_frag_size(&skb_shinfo(skb)->frags[i])); |
1da177e4 | 1139 | } |
126a3fd2 | 1140 | if (skb->len & 3) { |
1141 | put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, | |
1142 | 4 - (skb->len & 3)); | |
1143 | } | |
1da177e4 LT |
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((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)),tx->send+tx->tx_pos*4); | |
1155 | /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ | |
1156 | writel((vcc->vci << MID_SEG_VCI_SHIFT) | | |
a45a9e8a | 1157 | (aal5 ? 0 : (skb_data3 & 0xf)) | |
1da177e4 LT |
1158 | (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), |
1159 | 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(skb->len,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(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); | |
1167 | writel(eni_dev->dma[i*2+1],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(&eni_dev->tx_queue,skb); | |
59c03699 | 1177 | queued++; |
1da177e4 LT |
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(&tx->backlog))) { | |
1194 | res = do_tx(skb); | |
1195 | if (res == enq_ok) continue; | |
1196 | DPRINTK("re-queuing TX PDU\n"); | |
1197 | skb_queue_head(&tx->backlog,skb); | |
59c03699 | 1198 | requeued++; |
1da177e4 LT |
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(&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(&eni_dev->tx_queue,skb); | |
1226 | break; | |
1227 | } | |
1228 | ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); | |
ede58ef2 C |
1229 | dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, |
1230 | DMA_TO_DEVICE); | |
1da177e4 LT |
1231 | if (vcc->pop) vcc->pop(vcc,skb); |
1232 | else dev_kfree_skb_irq(skb); | |
1233 | atomic_inc(&vcc->stats->tx); | |
1234 | wake_up(&eni_dev->tx_wait); | |
59c03699 | 1235 | dma_complete++; |
1da177e4 LT |
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); | |
6a19309d | 1276 | *res = DIV_ROUND_UP(TS_CLOCK, div)-1; |
1da177e4 LT |
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(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); | |
1322 | if (!mem) return -ENOBUFS; | |
1323 | tx = alloc_tx(eni_dev,unlimited); | |
1324 | if (!tx) { | |
1325 | eni_free_mem(eni_dev,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(&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,&rate,tx->reserved,&pre,&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,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,&vcc->qos.txtp,1,1); | |
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(&eni_dev->tx_wait,&wait); | |
1402 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1403 | for (;;) { | |
1404 | int txing; | |
1405 | ||
1406 | tasklet_disable(&eni_dev->task); | |
1407 | txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; | |
1408 | tasklet_enable(&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(&eni_dev->tx_wait,&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,eni_vcc->tx->send,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(&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 | { | |
1da177e4 | 1474 | DPRINTK(">bug_int\n"); |
1da177e4 LT |
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("---dump ends here---\n",0,0); | |
1485 | printk(KERN_NOTICE "---recent events---\n"); | |
1486 | event_dump(); | |
1487 | } | |
1488 | ||
1489 | ||
7d12e780 | 1490 | static irqreturn_t eni_int(int irq,void *dev_id) |
1da177e4 LT |
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("stat overflow\n",0,0); | |
1509 | eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; | |
1510 | } | |
1511 | if (reason & MID_SUNI_INT) { | |
1512 | EVENT("SUNI int\n",0,0); | |
1513 | dev->phy->interrupt(dev); | |
1514 | #if 0 | |
1515 | foo(); | |
1516 | #endif | |
1517 | } | |
1518 | spin_lock(&eni_dev->lock); | |
1519 | eni_dev->events |= reason; | |
1520 | spin_unlock(&eni_dev->lock); | |
1521 | tasklet_schedule(&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(&eni_dev->lock,flags); | |
1537 | if (events & MID_RX_DMA_COMPLETE) { | |
1538 | EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); | |
1539 | dequeue_rx(dev); | |
1540 | EVENT("dequeue_rx done, starting poll_rx\n",0,0); | |
1541 | poll_rx(dev); | |
1542 | EVENT("poll_rx done\n",0,0); | |
1543 | /* poll_tx ? */ | |
1544 | } | |
1545 | if (events & MID_SERVICE) { | |
1546 | EVENT("INT: service, starting get_service\n",0,0); | |
1547 | get_service(dev); | |
1548 | EVENT("get_service done, starting poll_rx\n",0,0); | |
1549 | poll_rx(dev); | |
1550 | EVENT("poll_rx done\n",0,0); | |
1551 | } | |
1552 | if (events & MID_TX_DMA_COMPLETE) { | |
1553 | EVENT("INT: TX DMA COMPLETE\n",0,0); | |
1554 | dequeue_tx(dev); | |
1555 | } | |
1556 | if (events & MID_TX_COMPLETE) { | |
1557 | EVENT("INT: TX COMPLETE\n",0,0); | |
59c03699 | 1558 | tx_complete++; |
1da177e4 LT |
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("bug interrupt\n",0,0); | |
1564 | bug_int(dev,events); | |
1565 | } | |
1566 | poll_tx(dev); | |
1567 | } | |
1568 | ||
1569 | ||
1570 | /*--------------------------------- entries ---------------------------------*/ | |
1571 | ||
1572 | ||
6c44512d | 1573 | static char * const media_name[] = { |
1da177e4 LT |
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 | ||
6c44512d | 1597 | static int get_esi_asic(struct atm_dev *dev) |
1da177e4 LT |
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 | ||
6c44512d | 1689 | static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) |
1da177e4 LT |
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(mac_base+(i^3)); | |
1696 | return 0; | |
1697 | } | |
1698 | ||
1699 | ||
6c44512d | 1700 | static int eni_do_init(struct atm_dev *dev) |
1da177e4 LT |
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; | |
1da177e4 LT |
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; | |
1da177e4 LT |
1717 | if ((error = pci_write_config_word(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,", | |
44c10138 | 1725 | dev->number,pci_dev->revision,real_base,eni_dev->irq); |
4bdc0d67 | 1726 | if (!(base = ioremap(real_base,MAP_MAX_SIZE))) { |
1da177e4 LT |
1727 | printk("\n"); |
1728 | printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " | |
1729 | "mapping\n",dev->number); | |
7cf61566 | 1730 | return -ENOMEM; |
1da177e4 | 1731 | } |
126a3fd2 | 1732 | eni_dev->ioaddr = base; |
1da177e4 LT |
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(&eprom->magic) != ENI155_MAGIC) { | |
1738 | printk("\n"); | |
1941bf8c JP |
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)); | |
78e4be16 AL |
1743 | error = -EINVAL; |
1744 | goto unmap; | |
1da177e4 LT |
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(0x55555555,eni_dev->ram+i); | |
1753 | if (readl(eni_dev->ram+i) != 0x55555555) last = i; | |
1754 | else { | |
1755 | writel(0xAAAAAAAA,eni_dev->ram+i); | |
1756 | if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; | |
1757 | else writel(i,eni_dev->ram+i); | |
1758 | } | |
1759 | } | |
1760 | for (i = 0; i < last; i += RAM_INCREMENT) | |
1761 | if (readl(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)); | |
78e4be16 AL |
1771 | error = -EINVAL; |
1772 | goto unmap; | |
1da177e4 LT |
1773 | } |
1774 | error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); | |
78e4be16 AL |
1775 | if (error) |
1776 | goto unmap; | |
1da177e4 LT |
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", | |
ae7cd93e | 1782 | media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); |
78e4be16 AL |
1783 | |
1784 | error = suni_init(dev); | |
1785 | if (error) | |
1786 | goto unmap; | |
1787 | out: | |
1788 | return error; | |
1789 | unmap: | |
1790 | iounmap(base); | |
1791 | goto out; | |
1da177e4 LT |
1792 | } |
1793 | ||
126a3fd2 | 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(ed->ioaddr); | |
1801 | } | |
1da177e4 | 1802 | |
6c44512d | 1803 | static int eni_start(struct atm_dev *dev) |
1da177e4 LT |
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); | |
dace1453 | 1813 | if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { |
1da177e4 LT |
1814 | printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", |
1815 | dev->number,eni_dev->irq); | |
758d11bf AM |
1816 | error = -EAGAIN; |
1817 | goto out; | |
1da177e4 | 1818 | } |
1da177e4 LT |
1819 | pci_set_master(eni_dev->pci_dev); |
1820 | if ((error = pci_write_config_word(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); | |
758d11bf | 1825 | goto free_irq; |
1da177e4 LT |
1826 | } |
1827 | if ((error = pci_write_config_byte(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); | |
758d11bf | 1831 | goto free_irq; |
1da177e4 LT |
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(&eni_dev->task,eni_tasklet,(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; | |
d9e6620c ME |
1848 | eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, |
1849 | sizeof(*eni_dev->free_list), | |
1850 | GFP_KERNEL); | |
1da177e4 LT |
1851 | if (!eni_dev->free_list) { |
1852 | printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", | |
1853 | dev->number); | |
758d11bf AM |
1854 | error = -ENOMEM; |
1855 | goto free_irq; | |
1da177e4 LT |
1856 | } |
1857 | eni_dev->free_len = 0; | |
1858 | eni_put_free(eni_dev,buf,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); | |
758d11bf | 1871 | if (error) goto free_list; |
1da177e4 | 1872 | error = start_rx(dev); |
758d11bf | 1873 | if (error) goto free_list; |
1da177e4 | 1874 | error = dev->phy->start(dev); |
758d11bf | 1875 | if (error) goto free_list; |
1da177e4 LT |
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; | |
758d11bf AM |
1882 | |
1883 | free_list: | |
1884 | kfree(eni_dev->free_list); | |
1885 | ||
1886 | free_irq: | |
5eac5f6d | 1887 | free_irq(eni_dev->irq, dev); |
758d11bf AM |
1888 | |
1889 | out: | |
1890 | return error; | |
1da177e4 LT |
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(ATM_VF_READY,&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(ATM_VF_ADDR,&vcc->flags); | |
1906 | /*foo();*/ | |
1907 | } | |
1908 | ||
1909 | ||
1910 | static int eni_open(struct atm_vcc *vcc) | |
1911 | { | |
1da177e4 LT |
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("eni_open\n",0,0); | |
1919 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) | |
1920 | vcc->dev_data = NULL; | |
1da177e4 LT |
1921 | if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) |
1922 | set_bit(ATM_VF_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(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(ATM_VF_READY,&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(&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,&qos->txtp,rsv,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(&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((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | | |
1987 | (tx->prescaler << MID_SEG_PR_SHIFT) | | |
1988 | (tx->resolution << MID_SEG_RATE_SHIFT), dsc); | |
1989 | } | |
1990 | tasklet_enable(&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(&mult, arg, | |
2011 | 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(&ci, arg,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 | ||
1da177e4 LT |
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 | } | |
59c03699 | 2057 | submitted++; |
1da177e4 | 2058 | ATM_SKB(skb)->vcc = vcc; |
405698ca | 2059 | tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task); |
1da177e4 LT |
2060 | res = do_tx(skb); |
2061 | tasklet_enable(&ENI_DEV(vcc->dev)->task); | |
2062 | if (res == enq_ok) return 0; | |
2063 | skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); | |
59c03699 | 2064 | backlogged++; |
1da177e4 LT |
2065 | tasklet_schedule(&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(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 | { | |
1da177e4 LT |
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(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(page,"%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(page,"%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) { | |
597aec3f | 2147 | return sprintf(page, "tx[%d]: 0x%lx-0x%lx " |
1da177e4 LT |
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(page,"%10sbacklog %u packets\n","", | |
2156 | skb_queue_len(&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 | ||
b67bfe0d | 2162 | sk_for_each(s, head) { |
1da177e4 LT |
2163 | struct eni_vcc *eni_vcc; |
2164 | int length; | |
2165 | ||
2166 | vcc = atm_sk(s); | |
2167 | if (vcc->dev != dev) | |
2168 | continue; | |
2169 | eni_vcc = ENI_VCC(vcc); | |
2170 | if (--left) continue; | |
2171 | length = sprintf(page,"vcc %4d: ",vcc->vci); | |
2172 | if (eni_vcc->rx) { | |
597aec3f | 2173 | length += sprintf(page+length, "0x%lx-0x%lx " |
1da177e4 LT |
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(page+length,", "); | |
2179 | } | |
2180 | if (eni_vcc->tx) | |
2181 | length += sprintf(page+length,"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(page,"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, | |
1da177e4 LT |
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 | ||
6c44512d GKH |
2215 | static int eni_init_one(struct pci_dev *pci_dev, |
2216 | const struct pci_device_id *ent) | |
1da177e4 LT |
2217 | { |
2218 | struct atm_dev *dev; | |
2219 | struct eni_dev *eni_dev; | |
126a3fd2 | 2220 | struct eni_zero *zero; |
2221 | int rc; | |
2222 | ||
2223 | rc = pci_enable_device(pci_dev); | |
2224 | if (rc < 0) | |
2225 | goto out; | |
1da177e4 | 2226 | |
ede58ef2 C |
2227 | rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); |
2228 | if (rc < 0) | |
c2b94787 | 2229 | goto err_disable; |
ede58ef2 | 2230 | |
126a3fd2 | 2231 | rc = -ENOMEM; |
2232 | eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); | |
2233 | if (!eni_dev) | |
2234 | goto err_disable; | |
1da177e4 | 2235 | |
126a3fd2 | 2236 | zero = &eni_dev->zero; |
ede58ef2 C |
2237 | zero->addr = dma_alloc_coherent(&pci_dev->dev, |
2238 | ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); | |
126a3fd2 | 2239 | if (!zero->addr) |
2240 | goto err_kfree; | |
1da177e4 | 2241 | |
d9ca676b | 2242 | dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); |
126a3fd2 | 2243 | if (!dev) |
2244 | goto err_free_consistent; | |
2245 | ||
2246 | dev->dev_data = eni_dev; | |
1da177e4 LT |
2247 | pci_set_drvdata(pci_dev, dev); |
2248 | eni_dev->pci_dev = pci_dev; | |
1da177e4 | 2249 | eni_dev->asic = ent->driver_data; |
126a3fd2 | 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 | ||
1da177e4 LT |
2259 | eni_dev->more = eni_boards; |
2260 | eni_boards = dev; | |
126a3fd2 | 2261 | out: |
2262 | return rc; | |
2263 | ||
2264 | err_eni_release: | |
4deb550b TZ |
2265 | dev->phy = NULL; |
2266 | iounmap(ENI_DEV(dev)->ioaddr); | |
126a3fd2 | 2267 | err_unregister: |
1da177e4 | 2268 | atm_dev_deregister(dev); |
126a3fd2 | 2269 | err_free_consistent: |
ede58ef2 | 2270 | dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); |
126a3fd2 | 2271 | err_kfree: |
1da177e4 | 2272 | kfree(eni_dev); |
126a3fd2 | 2273 | err_disable: |
2274 | pci_disable_device(pci_dev); | |
2275 | goto out; | |
1da177e4 LT |
2276 | } |
2277 | ||
2278 | ||
f283974c | 2279 | static const struct pci_device_id eni_pci_tbl[] = { |
53522288 PH |
2280 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, |
2281 | { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, | |
1da177e4 LT |
2282 | { 0, } |
2283 | }; | |
2284 | MODULE_DEVICE_TABLE(pci,eni_pci_tbl); | |
2285 | ||
2286 | ||
6c44512d | 2287 | static void eni_remove_one(struct pci_dev *pdev) |
1da177e4 | 2288 | { |
126a3fd2 | 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); | |
ede58ef2 | 2295 | dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); |
126a3fd2 | 2296 | kfree(ed); |
2297 | pci_disable_device(pdev); | |
1da177e4 LT |
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, | |
6c44512d | 2305 | .remove = eni_remove_one, |
1da177e4 LT |
2306 | }; |
2307 | ||
2308 | ||
2309 | static int __init eni_init(void) | |
2310 | { | |
2311 | struct sk_buff *skb; /* dummy for sizeof */ | |
2312 | ||
5b5e0928 | 2313 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); |
1da177e4 LT |
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 | ||
fc0caed8 | 2321 | MODULE_DESCRIPTION("Efficient Networks ENI155P ATM NIC driver"); |
1da177e4 | 2322 | MODULE_LICENSE("GPL"); |