Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * nicstar.c | |
4 | * | |
5 | * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards. | |
6 | * | |
7 | * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME. | |
8 | * It was taken from the frle-0.22 device driver. | |
9 | * As the file doesn't have a copyright notice, in the file | |
10 | * nicstarmac.copyright I put the copyright notice from the | |
11 | * frle-0.22 device driver. | |
12 | * Some code is based on the nicstar driver by M. Welsh. | |
13 | * | |
14 | * Author: Rui Prior (rprior@inescn.pt) | |
15 | * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999 | |
16 | * | |
17 | * | |
18 | * (C) INESC 1999 | |
19 | * | |
20 | * | |
21 | ******************************************************************************/ | |
22 | ||
23 | ||
24 | /**** IMPORTANT INFORMATION *************************************************** | |
25 | * | |
26 | * There are currently three types of spinlocks: | |
27 | * | |
28 | * 1 - Per card interrupt spinlock (to protect structures and such) | |
29 | * 2 - Per SCQ scq spinlock | |
30 | * 3 - Per card resource spinlock (to access registers, etc.) | |
31 | * | |
32 | * These must NEVER be grabbed in reverse order. | |
33 | * | |
34 | ******************************************************************************/ | |
35 | ||
36 | /* Header files ***************************************************************/ | |
37 | ||
38 | #include <linux/module.h> | |
39 | #include <linux/config.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/atmdev.h> | |
43 | #include <linux/atm.h> | |
44 | #include <linux/pci.h> | |
45 | #include <linux/types.h> | |
46 | #include <linux/string.h> | |
47 | #include <linux/delay.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/sched.h> | |
50 | #include <linux/timer.h> | |
51 | #include <linux/interrupt.h> | |
52 | #include <linux/bitops.h> | |
53 | #include <asm/io.h> | |
54 | #include <asm/uaccess.h> | |
55 | #include <asm/atomic.h> | |
56 | #include "nicstar.h" | |
57 | #ifdef CONFIG_ATM_NICSTAR_USE_SUNI | |
58 | #include "suni.h" | |
59 | #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */ | |
60 | #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105 | |
61 | #include "idt77105.h" | |
62 | #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */ | |
63 | ||
64 | #if BITS_PER_LONG != 32 | |
65 | # error FIXME: this driver requires a 32-bit platform | |
66 | #endif | |
67 | ||
68 | /* Additional code ************************************************************/ | |
69 | ||
70 | #include "nicstarmac.c" | |
71 | ||
72 | ||
73 | /* Configurable parameters ****************************************************/ | |
74 | ||
75 | #undef PHY_LOOPBACK | |
76 | #undef TX_DEBUG | |
77 | #undef RX_DEBUG | |
78 | #undef GENERAL_DEBUG | |
79 | #undef EXTRA_DEBUG | |
80 | ||
81 | #undef NS_USE_DESTRUCTORS /* For now keep this undefined unless you know | |
82 | you're going to use only raw ATM */ | |
83 | ||
84 | ||
85 | /* Do not touch these *********************************************************/ | |
86 | ||
87 | #ifdef TX_DEBUG | |
88 | #define TXPRINTK(args...) printk(args) | |
89 | #else | |
90 | #define TXPRINTK(args...) | |
91 | #endif /* TX_DEBUG */ | |
92 | ||
93 | #ifdef RX_DEBUG | |
94 | #define RXPRINTK(args...) printk(args) | |
95 | #else | |
96 | #define RXPRINTK(args...) | |
97 | #endif /* RX_DEBUG */ | |
98 | ||
99 | #ifdef GENERAL_DEBUG | |
100 | #define PRINTK(args...) printk(args) | |
101 | #else | |
102 | #define PRINTK(args...) | |
103 | #endif /* GENERAL_DEBUG */ | |
104 | ||
105 | #ifdef EXTRA_DEBUG | |
106 | #define XPRINTK(args...) printk(args) | |
107 | #else | |
108 | #define XPRINTK(args...) | |
109 | #endif /* EXTRA_DEBUG */ | |
110 | ||
111 | ||
112 | /* Macros *********************************************************************/ | |
113 | ||
114 | #define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ) | |
115 | ||
116 | #define NS_DELAY mdelay(1) | |
117 | ||
118 | #define ALIGN_BUS_ADDR(addr, alignment) \ | |
119 | ((((u32) (addr)) + (((u32) (alignment)) - 1)) & ~(((u32) (alignment)) - 1)) | |
120 | #define ALIGN_ADDRESS(addr, alignment) \ | |
121 | bus_to_virt(ALIGN_BUS_ADDR(virt_to_bus(addr), alignment)) | |
122 | ||
123 | #undef CEIL | |
124 | ||
125 | #ifndef ATM_SKB | |
126 | #define ATM_SKB(s) (&(s)->atm) | |
127 | #endif | |
128 | ||
129 | /* Spinlock debugging stuff */ | |
130 | #ifdef NS_DEBUG_SPINLOCKS /* See nicstar.h */ | |
131 | #define ns_grab_int_lock(card,flags) \ | |
132 | do { \ | |
133 | unsigned long nsdsf, nsdsf2; \ | |
134 | local_irq_save(flags); \ | |
135 | save_flags(nsdsf); cli();\ | |
136 | if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \ | |
137 | (flags)&(1<<9)?"en":"dis"); \ | |
138 | if (spin_is_locked(&(card)->int_lock) && \ | |
139 | (card)->cpu_int == smp_processor_id()) { \ | |
140 | printk("nicstar.c: line %d (cpu %d) int_lock already locked at line %d (cpu %d)\n", \ | |
141 | __LINE__, smp_processor_id(), (card)->has_int_lock, \ | |
142 | (card)->cpu_int); \ | |
143 | printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \ | |
144 | } \ | |
145 | if (spin_is_locked(&(card)->res_lock) && \ | |
146 | (card)->cpu_res == smp_processor_id()) { \ | |
147 | printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying int)\n", \ | |
148 | __LINE__, smp_processor_id(), (card)->has_res_lock, \ | |
149 | (card)->cpu_res); \ | |
150 | printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \ | |
151 | } \ | |
152 | spin_lock_irq(&(card)->int_lock); \ | |
153 | (card)->has_int_lock = __LINE__; \ | |
154 | (card)->cpu_int = smp_processor_id(); \ | |
155 | restore_flags(nsdsf); } while (0) | |
156 | #define ns_grab_res_lock(card,flags) \ | |
157 | do { \ | |
158 | unsigned long nsdsf, nsdsf2; \ | |
159 | local_irq_save(flags); \ | |
160 | save_flags(nsdsf); cli();\ | |
161 | if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \ | |
162 | (flags)&(1<<9)?"en":"dis"); \ | |
163 | if (spin_is_locked(&(card)->res_lock) && \ | |
164 | (card)->cpu_res == smp_processor_id()) { \ | |
165 | printk("nicstar.c: line %d (cpu %d) res_lock already locked at line %d (cpu %d)\n", \ | |
166 | __LINE__, smp_processor_id(), (card)->has_res_lock, \ | |
167 | (card)->cpu_res); \ | |
168 | printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \ | |
169 | } \ | |
170 | spin_lock_irq(&(card)->res_lock); \ | |
171 | (card)->has_res_lock = __LINE__; \ | |
172 | (card)->cpu_res = smp_processor_id(); \ | |
173 | restore_flags(nsdsf); } while (0) | |
174 | #define ns_grab_scq_lock(card,scq,flags) \ | |
175 | do { \ | |
176 | unsigned long nsdsf, nsdsf2; \ | |
177 | local_irq_save(flags); \ | |
178 | save_flags(nsdsf); cli();\ | |
179 | if (nsdsf & (1<<9)) printk ("nicstar.c: ints %sabled -> enabled.\n", \ | |
180 | (flags)&(1<<9)?"en":"dis"); \ | |
181 | if (spin_is_locked(&(scq)->lock) && \ | |
182 | (scq)->cpu_lock == smp_processor_id()) { \ | |
183 | printk("nicstar.c: line %d (cpu %d) this scq_lock already locked at line %d (cpu %d)\n", \ | |
184 | __LINE__, smp_processor_id(), (scq)->has_lock, \ | |
185 | (scq)->cpu_lock); \ | |
186 | printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \ | |
187 | } \ | |
188 | if (spin_is_locked(&(card)->res_lock) && \ | |
189 | (card)->cpu_res == smp_processor_id()) { \ | |
190 | printk("nicstar.c: line %d (cpu %d) res_lock locked at line %d (cpu %d)(trying scq)\n", \ | |
191 | __LINE__, smp_processor_id(), (card)->has_res_lock, \ | |
192 | (card)->cpu_res); \ | |
193 | printk("nicstar.c: ints were %sabled.\n", ((flags)&(1<<9)?"en":"dis")); \ | |
194 | } \ | |
195 | spin_lock_irq(&(scq)->lock); \ | |
196 | (scq)->has_lock = __LINE__; \ | |
197 | (scq)->cpu_lock = smp_processor_id(); \ | |
198 | restore_flags(nsdsf); } while (0) | |
199 | #else /* !NS_DEBUG_SPINLOCKS */ | |
200 | #define ns_grab_int_lock(card,flags) \ | |
201 | spin_lock_irqsave(&(card)->int_lock,(flags)) | |
202 | #define ns_grab_res_lock(card,flags) \ | |
203 | spin_lock_irqsave(&(card)->res_lock,(flags)) | |
204 | #define ns_grab_scq_lock(card,scq,flags) \ | |
205 | spin_lock_irqsave(&(scq)->lock,flags) | |
206 | #endif /* NS_DEBUG_SPINLOCKS */ | |
207 | ||
208 | ||
209 | /* Function declarations ******************************************************/ | |
210 | ||
211 | static u32 ns_read_sram(ns_dev *card, u32 sram_address); | |
212 | static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count); | |
213 | static int __devinit ns_init_card(int i, struct pci_dev *pcidev); | |
214 | static void __devinit ns_init_card_error(ns_dev *card, int error); | |
215 | static scq_info *get_scq(int size, u32 scd); | |
216 | static void free_scq(scq_info *scq, struct atm_vcc *vcc); | |
217 | static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1, | |
218 | u32 handle2, u32 addr2); | |
219 | static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs); | |
220 | static int ns_open(struct atm_vcc *vcc); | |
221 | static void ns_close(struct atm_vcc *vcc); | |
222 | static void fill_tst(ns_dev *card, int n, vc_map *vc); | |
223 | static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb); | |
224 | static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd, | |
225 | struct sk_buff *skb); | |
226 | static void process_tsq(ns_dev *card); | |
227 | static void drain_scq(ns_dev *card, scq_info *scq, int pos); | |
228 | static void process_rsq(ns_dev *card); | |
229 | static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe); | |
230 | #ifdef NS_USE_DESTRUCTORS | |
231 | static void ns_sb_destructor(struct sk_buff *sb); | |
232 | static void ns_lb_destructor(struct sk_buff *lb); | |
233 | static void ns_hb_destructor(struct sk_buff *hb); | |
234 | #endif /* NS_USE_DESTRUCTORS */ | |
235 | static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb); | |
236 | static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count); | |
237 | static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb); | |
238 | static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb); | |
239 | static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb); | |
240 | static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page); | |
241 | static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg); | |
242 | static void which_list(ns_dev *card, struct sk_buff *skb); | |
243 | static void ns_poll(unsigned long arg); | |
244 | static int ns_parse_mac(char *mac, unsigned char *esi); | |
245 | static short ns_h2i(char c); | |
246 | static void ns_phy_put(struct atm_dev *dev, unsigned char value, | |
247 | unsigned long addr); | |
248 | static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr); | |
249 | ||
250 | ||
251 | ||
252 | /* Global variables ***********************************************************/ | |
253 | ||
254 | static struct ns_dev *cards[NS_MAX_CARDS]; | |
255 | static unsigned num_cards; | |
256 | static struct atmdev_ops atm_ops = | |
257 | { | |
258 | .open = ns_open, | |
259 | .close = ns_close, | |
260 | .ioctl = ns_ioctl, | |
261 | .send = ns_send, | |
262 | .phy_put = ns_phy_put, | |
263 | .phy_get = ns_phy_get, | |
264 | .proc_read = ns_proc_read, | |
265 | .owner = THIS_MODULE, | |
266 | }; | |
267 | static struct timer_list ns_timer; | |
268 | static char *mac[NS_MAX_CARDS]; | |
269 | module_param_array(mac, charp, NULL, 0); | |
270 | MODULE_LICENSE("GPL"); | |
271 | ||
272 | ||
273 | /* Functions*******************************************************************/ | |
274 | ||
275 | static int __devinit nicstar_init_one(struct pci_dev *pcidev, | |
276 | const struct pci_device_id *ent) | |
277 | { | |
278 | static int index = -1; | |
279 | unsigned int error; | |
280 | ||
281 | index++; | |
282 | cards[index] = NULL; | |
283 | ||
284 | error = ns_init_card(index, pcidev); | |
285 | if (error) { | |
286 | cards[index--] = NULL; /* don't increment index */ | |
287 | goto err_out; | |
288 | } | |
289 | ||
290 | return 0; | |
291 | err_out: | |
292 | return -ENODEV; | |
293 | } | |
294 | ||
295 | ||
296 | ||
297 | static void __devexit nicstar_remove_one(struct pci_dev *pcidev) | |
298 | { | |
299 | int i, j; | |
300 | ns_dev *card = pci_get_drvdata(pcidev); | |
301 | struct sk_buff *hb; | |
302 | struct sk_buff *iovb; | |
303 | struct sk_buff *lb; | |
304 | struct sk_buff *sb; | |
305 | ||
306 | i = card->index; | |
307 | ||
308 | if (cards[i] == NULL) | |
309 | return; | |
310 | ||
311 | if (card->atmdev->phy && card->atmdev->phy->stop) | |
312 | card->atmdev->phy->stop(card->atmdev); | |
313 | ||
314 | /* Stop everything */ | |
315 | writel(0x00000000, card->membase + CFG); | |
316 | ||
317 | /* De-register device */ | |
318 | atm_dev_deregister(card->atmdev); | |
319 | ||
320 | /* Disable PCI device */ | |
321 | pci_disable_device(pcidev); | |
322 | ||
323 | /* Free up resources */ | |
324 | j = 0; | |
325 | PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count); | |
326 | while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) | |
327 | { | |
328 | dev_kfree_skb_any(hb); | |
329 | j++; | |
330 | } | |
331 | PRINTK("nicstar%d: %d huge buffers freed.\n", i, j); | |
332 | j = 0; | |
333 | PRINTK("nicstar%d: freeing %d iovec buffers.\n", i, card->iovpool.count); | |
334 | while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) | |
335 | { | |
336 | dev_kfree_skb_any(iovb); | |
337 | j++; | |
338 | } | |
339 | PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j); | |
340 | while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL) | |
341 | dev_kfree_skb_any(lb); | |
342 | while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL) | |
343 | dev_kfree_skb_any(sb); | |
344 | free_scq(card->scq0, NULL); | |
345 | for (j = 0; j < NS_FRSCD_NUM; j++) | |
346 | { | |
347 | if (card->scd2vc[j] != NULL) | |
348 | free_scq(card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc); | |
349 | } | |
350 | kfree(card->rsq.org); | |
351 | kfree(card->tsq.org); | |
352 | free_irq(card->pcidev->irq, card); | |
353 | iounmap(card->membase); | |
354 | kfree(card); | |
355 | } | |
356 | ||
357 | ||
358 | ||
359 | static struct pci_device_id nicstar_pci_tbl[] __devinitdata = | |
360 | { | |
361 | {PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77201, | |
362 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
363 | {0,} /* terminate list */ | |
364 | }; | |
365 | MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl); | |
366 | ||
367 | ||
368 | ||
369 | static struct pci_driver nicstar_driver = { | |
370 | .name = "nicstar", | |
371 | .id_table = nicstar_pci_tbl, | |
372 | .probe = nicstar_init_one, | |
373 | .remove = __devexit_p(nicstar_remove_one), | |
374 | }; | |
375 | ||
376 | ||
377 | ||
378 | static int __init nicstar_init(void) | |
379 | { | |
380 | unsigned error = 0; /* Initialized to remove compile warning */ | |
381 | ||
382 | XPRINTK("nicstar: nicstar_init() called.\n"); | |
383 | ||
384 | error = pci_register_driver(&nicstar_driver); | |
385 | ||
386 | TXPRINTK("nicstar: TX debug enabled.\n"); | |
387 | RXPRINTK("nicstar: RX debug enabled.\n"); | |
388 | PRINTK("nicstar: General debug enabled.\n"); | |
389 | #ifdef PHY_LOOPBACK | |
390 | printk("nicstar: using PHY loopback.\n"); | |
391 | #endif /* PHY_LOOPBACK */ | |
392 | XPRINTK("nicstar: nicstar_init() returned.\n"); | |
393 | ||
394 | if (!error) { | |
395 | init_timer(&ns_timer); | |
396 | ns_timer.expires = jiffies + NS_POLL_PERIOD; | |
397 | ns_timer.data = 0UL; | |
398 | ns_timer.function = ns_poll; | |
399 | add_timer(&ns_timer); | |
400 | } | |
401 | ||
402 | return error; | |
403 | } | |
404 | ||
405 | ||
406 | ||
407 | static void __exit nicstar_cleanup(void) | |
408 | { | |
409 | XPRINTK("nicstar: nicstar_cleanup() called.\n"); | |
410 | ||
411 | del_timer(&ns_timer); | |
412 | ||
413 | pci_unregister_driver(&nicstar_driver); | |
414 | ||
415 | XPRINTK("nicstar: nicstar_cleanup() returned.\n"); | |
416 | } | |
417 | ||
418 | ||
419 | ||
420 | static u32 ns_read_sram(ns_dev *card, u32 sram_address) | |
421 | { | |
422 | unsigned long flags; | |
423 | u32 data; | |
424 | sram_address <<= 2; | |
425 | sram_address &= 0x0007FFFC; /* address must be dword aligned */ | |
426 | sram_address |= 0x50000000; /* SRAM read command */ | |
427 | ns_grab_res_lock(card, flags); | |
428 | while (CMD_BUSY(card)); | |
429 | writel(sram_address, card->membase + CMD); | |
430 | while (CMD_BUSY(card)); | |
431 | data = readl(card->membase + DR0); | |
432 | spin_unlock_irqrestore(&card->res_lock, flags); | |
433 | return data; | |
434 | } | |
435 | ||
436 | ||
437 | ||
438 | static void ns_write_sram(ns_dev *card, u32 sram_address, u32 *value, int count) | |
439 | { | |
440 | unsigned long flags; | |
441 | int i, c; | |
442 | count--; /* count range now is 0..3 instead of 1..4 */ | |
443 | c = count; | |
444 | c <<= 2; /* to use increments of 4 */ | |
445 | ns_grab_res_lock(card, flags); | |
446 | while (CMD_BUSY(card)); | |
447 | for (i = 0; i <= c; i += 4) | |
448 | writel(*(value++), card->membase + i); | |
449 | /* Note: DR# registers are the first 4 dwords in nicstar's memspace, | |
450 | so card->membase + DR0 == card->membase */ | |
451 | sram_address <<= 2; | |
452 | sram_address &= 0x0007FFFC; | |
453 | sram_address |= (0x40000000 | count); | |
454 | writel(sram_address, card->membase + CMD); | |
455 | spin_unlock_irqrestore(&card->res_lock, flags); | |
456 | } | |
457 | ||
458 | ||
459 | static int __devinit ns_init_card(int i, struct pci_dev *pcidev) | |
460 | { | |
461 | int j; | |
462 | struct ns_dev *card = NULL; | |
463 | unsigned char pci_latency; | |
464 | unsigned error; | |
465 | u32 data; | |
466 | u32 u32d[4]; | |
467 | u32 ns_cfg_rctsize; | |
468 | int bcount; | |
469 | unsigned long membase; | |
470 | ||
471 | error = 0; | |
472 | ||
473 | if (pci_enable_device(pcidev)) | |
474 | { | |
475 | printk("nicstar%d: can't enable PCI device\n", i); | |
476 | error = 2; | |
477 | ns_init_card_error(card, error); | |
478 | return error; | |
479 | } | |
480 | ||
481 | if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) | |
482 | { | |
483 | printk("nicstar%d: can't allocate memory for device structure.\n", i); | |
484 | error = 2; | |
485 | ns_init_card_error(card, error); | |
486 | return error; | |
487 | } | |
488 | cards[i] = card; | |
489 | spin_lock_init(&card->int_lock); | |
490 | spin_lock_init(&card->res_lock); | |
491 | ||
492 | pci_set_drvdata(pcidev, card); | |
493 | ||
494 | card->index = i; | |
495 | card->atmdev = NULL; | |
496 | card->pcidev = pcidev; | |
497 | membase = pci_resource_start(pcidev, 1); | |
498 | card->membase = ioremap(membase, NS_IOREMAP_SIZE); | |
499 | if (card->membase == 0) | |
500 | { | |
501 | printk("nicstar%d: can't ioremap() membase.\n",i); | |
502 | error = 3; | |
503 | ns_init_card_error(card, error); | |
504 | return error; | |
505 | } | |
506 | PRINTK("nicstar%d: membase at 0x%x.\n", i, card->membase); | |
507 | ||
508 | pci_set_master(pcidev); | |
509 | ||
510 | if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) | |
511 | { | |
512 | printk("nicstar%d: can't read PCI latency timer.\n", i); | |
513 | error = 6; | |
514 | ns_init_card_error(card, error); | |
515 | return error; | |
516 | } | |
517 | #ifdef NS_PCI_LATENCY | |
518 | if (pci_latency < NS_PCI_LATENCY) | |
519 | { | |
520 | PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i, NS_PCI_LATENCY); | |
521 | for (j = 1; j < 4; j++) | |
522 | { | |
523 | if (pci_write_config_byte(pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0) | |
524 | break; | |
525 | } | |
526 | if (j == 4) | |
527 | { | |
528 | printk("nicstar%d: can't set PCI latency timer to %d.\n", i, NS_PCI_LATENCY); | |
529 | error = 7; | |
530 | ns_init_card_error(card, error); | |
531 | return error; | |
532 | } | |
533 | } | |
534 | #endif /* NS_PCI_LATENCY */ | |
535 | ||
536 | /* Clear timer overflow */ | |
537 | data = readl(card->membase + STAT); | |
538 | if (data & NS_STAT_TMROF) | |
539 | writel(NS_STAT_TMROF, card->membase + STAT); | |
540 | ||
541 | /* Software reset */ | |
542 | writel(NS_CFG_SWRST, card->membase + CFG); | |
543 | NS_DELAY; | |
544 | writel(0x00000000, card->membase + CFG); | |
545 | ||
546 | /* PHY reset */ | |
547 | writel(0x00000008, card->membase + GP); | |
548 | NS_DELAY; | |
549 | writel(0x00000001, card->membase + GP); | |
550 | NS_DELAY; | |
551 | while (CMD_BUSY(card)); | |
552 | writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD); /* Sync UTOPIA with SAR clock */ | |
553 | NS_DELAY; | |
554 | ||
555 | /* Detect PHY type */ | |
556 | while (CMD_BUSY(card)); | |
557 | writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD); | |
558 | while (CMD_BUSY(card)); | |
559 | data = readl(card->membase + DR0); | |
560 | switch(data) { | |
561 | case 0x00000009: | |
562 | printk("nicstar%d: PHY seems to be 25 Mbps.\n", i); | |
563 | card->max_pcr = ATM_25_PCR; | |
564 | while(CMD_BUSY(card)); | |
565 | writel(0x00000008, card->membase + DR0); | |
566 | writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD); | |
567 | /* Clear an eventual pending interrupt */ | |
568 | writel(NS_STAT_SFBQF, card->membase + STAT); | |
569 | #ifdef PHY_LOOPBACK | |
570 | while(CMD_BUSY(card)); | |
571 | writel(0x00000022, card->membase + DR0); | |
572 | writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD); | |
573 | #endif /* PHY_LOOPBACK */ | |
574 | break; | |
575 | case 0x00000030: | |
576 | case 0x00000031: | |
577 | printk("nicstar%d: PHY seems to be 155 Mbps.\n", i); | |
578 | card->max_pcr = ATM_OC3_PCR; | |
579 | #ifdef PHY_LOOPBACK | |
580 | while(CMD_BUSY(card)); | |
581 | writel(0x00000002, card->membase + DR0); | |
582 | writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD); | |
583 | #endif /* PHY_LOOPBACK */ | |
584 | break; | |
585 | default: | |
586 | printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data); | |
587 | error = 8; | |
588 | ns_init_card_error(card, error); | |
589 | return error; | |
590 | } | |
591 | writel(0x00000000, card->membase + GP); | |
592 | ||
593 | /* Determine SRAM size */ | |
594 | data = 0x76543210; | |
595 | ns_write_sram(card, 0x1C003, &data, 1); | |
596 | data = 0x89ABCDEF; | |
597 | ns_write_sram(card, 0x14003, &data, 1); | |
598 | if (ns_read_sram(card, 0x14003) == 0x89ABCDEF && | |
599 | ns_read_sram(card, 0x1C003) == 0x76543210) | |
600 | card->sram_size = 128; | |
601 | else | |
602 | card->sram_size = 32; | |
603 | PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size); | |
604 | ||
605 | card->rct_size = NS_MAX_RCTSIZE; | |
606 | ||
607 | #if (NS_MAX_RCTSIZE == 4096) | |
608 | if (card->sram_size == 128) | |
609 | printk("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n", i); | |
610 | #elif (NS_MAX_RCTSIZE == 16384) | |
611 | if (card->sram_size == 32) | |
612 | { | |
613 | printk("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n", i); | |
614 | card->rct_size = 4096; | |
615 | } | |
616 | #else | |
617 | #error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c | |
618 | #endif | |
619 | ||
620 | card->vpibits = NS_VPIBITS; | |
621 | if (card->rct_size == 4096) | |
622 | card->vcibits = 12 - NS_VPIBITS; | |
623 | else /* card->rct_size == 16384 */ | |
624 | card->vcibits = 14 - NS_VPIBITS; | |
625 | ||
626 | /* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */ | |
627 | if (mac[i] == NULL) | |
628 | nicstar_init_eprom(card->membase); | |
629 | ||
630 | if (request_irq(pcidev->irq, &ns_irq_handler, SA_INTERRUPT | SA_SHIRQ, "nicstar", card) != 0) | |
631 | { | |
632 | printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq); | |
633 | error = 9; | |
634 | ns_init_card_error(card, error); | |
635 | return error; | |
636 | } | |
637 | ||
638 | /* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */ | |
639 | writel(0x00000000, card->membase + VPM); | |
640 | ||
641 | /* Initialize TSQ */ | |
642 | card->tsq.org = kmalloc(NS_TSQSIZE + NS_TSQ_ALIGNMENT, GFP_KERNEL); | |
643 | if (card->tsq.org == NULL) | |
644 | { | |
645 | printk("nicstar%d: can't allocate TSQ.\n", i); | |
646 | error = 10; | |
647 | ns_init_card_error(card, error); | |
648 | return error; | |
649 | } | |
650 | card->tsq.base = (ns_tsi *) ALIGN_ADDRESS(card->tsq.org, NS_TSQ_ALIGNMENT); | |
651 | card->tsq.next = card->tsq.base; | |
652 | card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1); | |
653 | for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++) | |
654 | ns_tsi_init(card->tsq.base + j); | |
655 | writel(0x00000000, card->membase + TSQH); | |
656 | writel((u32) virt_to_bus(card->tsq.base), card->membase + TSQB); | |
657 | PRINTK("nicstar%d: TSQ base at 0x%x 0x%x 0x%x.\n", i, (u32) card->tsq.base, | |
658 | (u32) virt_to_bus(card->tsq.base), readl(card->membase + TSQB)); | |
659 | ||
660 | /* Initialize RSQ */ | |
661 | card->rsq.org = kmalloc(NS_RSQSIZE + NS_RSQ_ALIGNMENT, GFP_KERNEL); | |
662 | if (card->rsq.org == NULL) | |
663 | { | |
664 | printk("nicstar%d: can't allocate RSQ.\n", i); | |
665 | error = 11; | |
666 | ns_init_card_error(card, error); | |
667 | return error; | |
668 | } | |
669 | card->rsq.base = (ns_rsqe *) ALIGN_ADDRESS(card->rsq.org, NS_RSQ_ALIGNMENT); | |
670 | card->rsq.next = card->rsq.base; | |
671 | card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1); | |
672 | for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++) | |
673 | ns_rsqe_init(card->rsq.base + j); | |
674 | writel(0x00000000, card->membase + RSQH); | |
675 | writel((u32) virt_to_bus(card->rsq.base), card->membase + RSQB); | |
676 | PRINTK("nicstar%d: RSQ base at 0x%x.\n", i, (u32) card->rsq.base); | |
677 | ||
678 | /* Initialize SCQ0, the only VBR SCQ used */ | |
679 | card->scq1 = (scq_info *) NULL; | |
680 | card->scq2 = (scq_info *) NULL; | |
681 | card->scq0 = get_scq(VBR_SCQSIZE, NS_VRSCD0); | |
682 | if (card->scq0 == (scq_info *) NULL) | |
683 | { | |
684 | printk("nicstar%d: can't get SCQ0.\n", i); | |
685 | error = 12; | |
686 | ns_init_card_error(card, error); | |
687 | return error; | |
688 | } | |
689 | u32d[0] = (u32) virt_to_bus(card->scq0->base); | |
690 | u32d[1] = (u32) 0x00000000; | |
691 | u32d[2] = (u32) 0xffffffff; | |
692 | u32d[3] = (u32) 0x00000000; | |
693 | ns_write_sram(card, NS_VRSCD0, u32d, 4); | |
694 | ns_write_sram(card, NS_VRSCD1, u32d, 4); /* These last two won't be used */ | |
695 | ns_write_sram(card, NS_VRSCD2, u32d, 4); /* but are initialized, just in case... */ | |
696 | card->scq0->scd = NS_VRSCD0; | |
697 | PRINTK("nicstar%d: VBR-SCQ0 base at 0x%x.\n", i, (u32) card->scq0->base); | |
698 | ||
699 | /* Initialize TSTs */ | |
700 | card->tst_addr = NS_TST0; | |
701 | card->tst_free_entries = NS_TST_NUM_ENTRIES; | |
702 | data = NS_TST_OPCODE_VARIABLE; | |
703 | for (j = 0; j < NS_TST_NUM_ENTRIES; j++) | |
704 | ns_write_sram(card, NS_TST0 + j, &data, 1); | |
705 | data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0); | |
706 | ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1); | |
707 | for (j = 0; j < NS_TST_NUM_ENTRIES; j++) | |
708 | ns_write_sram(card, NS_TST1 + j, &data, 1); | |
709 | data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1); | |
710 | ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1); | |
711 | for (j = 0; j < NS_TST_NUM_ENTRIES; j++) | |
712 | card->tste2vc[j] = NULL; | |
713 | writel(NS_TST0 << 2, card->membase + TSTB); | |
714 | ||
715 | ||
716 | /* Initialize RCT. AAL type is set on opening the VC. */ | |
717 | #ifdef RCQ_SUPPORT | |
718 | u32d[0] = NS_RCTE_RAWCELLINTEN; | |
719 | #else | |
720 | u32d[0] = 0x00000000; | |
721 | #endif /* RCQ_SUPPORT */ | |
722 | u32d[1] = 0x00000000; | |
723 | u32d[2] = 0x00000000; | |
724 | u32d[3] = 0xFFFFFFFF; | |
725 | for (j = 0; j < card->rct_size; j++) | |
726 | ns_write_sram(card, j * 4, u32d, 4); | |
727 | ||
728 | memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map)); | |
729 | ||
730 | for (j = 0; j < NS_FRSCD_NUM; j++) | |
731 | card->scd2vc[j] = NULL; | |
732 | ||
733 | /* Initialize buffer levels */ | |
734 | card->sbnr.min = MIN_SB; | |
735 | card->sbnr.init = NUM_SB; | |
736 | card->sbnr.max = MAX_SB; | |
737 | card->lbnr.min = MIN_LB; | |
738 | card->lbnr.init = NUM_LB; | |
739 | card->lbnr.max = MAX_LB; | |
740 | card->iovnr.min = MIN_IOVB; | |
741 | card->iovnr.init = NUM_IOVB; | |
742 | card->iovnr.max = MAX_IOVB; | |
743 | card->hbnr.min = MIN_HB; | |
744 | card->hbnr.init = NUM_HB; | |
745 | card->hbnr.max = MAX_HB; | |
746 | ||
747 | card->sm_handle = 0x00000000; | |
748 | card->sm_addr = 0x00000000; | |
749 | card->lg_handle = 0x00000000; | |
750 | card->lg_addr = 0x00000000; | |
751 | ||
752 | card->efbie = 1; /* To prevent push_rxbufs from enabling the interrupt */ | |
753 | ||
754 | /* Pre-allocate some huge buffers */ | |
755 | skb_queue_head_init(&card->hbpool.queue); | |
756 | card->hbpool.count = 0; | |
757 | for (j = 0; j < NUM_HB; j++) | |
758 | { | |
759 | struct sk_buff *hb; | |
760 | hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL); | |
761 | if (hb == NULL) | |
762 | { | |
763 | printk("nicstar%d: can't allocate %dth of %d huge buffers.\n", | |
764 | i, j, NUM_HB); | |
765 | error = 13; | |
766 | ns_init_card_error(card, error); | |
767 | return error; | |
768 | } | |
769 | skb_queue_tail(&card->hbpool.queue, hb); | |
770 | card->hbpool.count++; | |
771 | } | |
772 | ||
773 | ||
774 | /* Allocate large buffers */ | |
775 | skb_queue_head_init(&card->lbpool.queue); | |
776 | card->lbpool.count = 0; /* Not used */ | |
777 | for (j = 0; j < NUM_LB; j++) | |
778 | { | |
779 | struct sk_buff *lb; | |
780 | lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL); | |
781 | if (lb == NULL) | |
782 | { | |
783 | printk("nicstar%d: can't allocate %dth of %d large buffers.\n", | |
784 | i, j, NUM_LB); | |
785 | error = 14; | |
786 | ns_init_card_error(card, error); | |
787 | return error; | |
788 | } | |
789 | skb_queue_tail(&card->lbpool.queue, lb); | |
790 | skb_reserve(lb, NS_SMBUFSIZE); | |
791 | push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0); | |
792 | /* Due to the implementation of push_rxbufs() this is 1, not 0 */ | |
793 | if (j == 1) | |
794 | { | |
795 | card->rcbuf = lb; | |
796 | card->rawch = (u32) virt_to_bus(lb->data); | |
797 | } | |
798 | } | |
799 | /* Test for strange behaviour which leads to crashes */ | |
800 | if ((bcount = ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) | |
801 | { | |
802 | printk("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n", | |
803 | i, j, bcount); | |
804 | error = 14; | |
805 | ns_init_card_error(card, error); | |
806 | return error; | |
807 | } | |
808 | ||
809 | ||
810 | /* Allocate small buffers */ | |
811 | skb_queue_head_init(&card->sbpool.queue); | |
812 | card->sbpool.count = 0; /* Not used */ | |
813 | for (j = 0; j < NUM_SB; j++) | |
814 | { | |
815 | struct sk_buff *sb; | |
816 | sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL); | |
817 | if (sb == NULL) | |
818 | { | |
819 | printk("nicstar%d: can't allocate %dth of %d small buffers.\n", | |
820 | i, j, NUM_SB); | |
821 | error = 15; | |
822 | ns_init_card_error(card, error); | |
823 | return error; | |
824 | } | |
825 | skb_queue_tail(&card->sbpool.queue, sb); | |
826 | skb_reserve(sb, NS_AAL0_HEADER); | |
827 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0); | |
828 | } | |
829 | /* Test for strange behaviour which leads to crashes */ | |
830 | if ((bcount = ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) | |
831 | { | |
832 | printk("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n", | |
833 | i, j, bcount); | |
834 | error = 15; | |
835 | ns_init_card_error(card, error); | |
836 | return error; | |
837 | } | |
838 | ||
839 | ||
840 | /* Allocate iovec buffers */ | |
841 | skb_queue_head_init(&card->iovpool.queue); | |
842 | card->iovpool.count = 0; | |
843 | for (j = 0; j < NUM_IOVB; j++) | |
844 | { | |
845 | struct sk_buff *iovb; | |
846 | iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL); | |
847 | if (iovb == NULL) | |
848 | { | |
849 | printk("nicstar%d: can't allocate %dth of %d iovec buffers.\n", | |
850 | i, j, NUM_IOVB); | |
851 | error = 16; | |
852 | ns_init_card_error(card, error); | |
853 | return error; | |
854 | } | |
855 | skb_queue_tail(&card->iovpool.queue, iovb); | |
856 | card->iovpool.count++; | |
857 | } | |
858 | ||
859 | card->intcnt = 0; | |
860 | ||
861 | /* Configure NICStAR */ | |
862 | if (card->rct_size == 4096) | |
863 | ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES; | |
864 | else /* (card->rct_size == 16384) */ | |
865 | ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES; | |
866 | ||
867 | card->efbie = 1; | |
868 | ||
869 | /* Register device */ | |
870 | card->atmdev = atm_dev_register("nicstar", &atm_ops, -1, NULL); | |
871 | if (card->atmdev == NULL) | |
872 | { | |
873 | printk("nicstar%d: can't register device.\n", i); | |
874 | error = 17; | |
875 | ns_init_card_error(card, error); | |
876 | return error; | |
877 | } | |
878 | ||
879 | if (ns_parse_mac(mac[i], card->atmdev->esi)) { | |
880 | nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET, | |
881 | card->atmdev->esi, 6); | |
882 | if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) == 0) { | |
883 | nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT, | |
884 | card->atmdev->esi, 6); | |
885 | } | |
886 | } | |
887 | ||
888 | printk("nicstar%d: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n", i, | |
889 | card->atmdev->esi[0], card->atmdev->esi[1], card->atmdev->esi[2], | |
890 | card->atmdev->esi[3], card->atmdev->esi[4], card->atmdev->esi[5]); | |
891 | ||
892 | card->atmdev->dev_data = card; | |
893 | card->atmdev->ci_range.vpi_bits = card->vpibits; | |
894 | card->atmdev->ci_range.vci_bits = card->vcibits; | |
895 | card->atmdev->link_rate = card->max_pcr; | |
896 | card->atmdev->phy = NULL; | |
897 | ||
898 | #ifdef CONFIG_ATM_NICSTAR_USE_SUNI | |
899 | if (card->max_pcr == ATM_OC3_PCR) | |
900 | suni_init(card->atmdev); | |
901 | #endif /* CONFIG_ATM_NICSTAR_USE_SUNI */ | |
902 | ||
903 | #ifdef CONFIG_ATM_NICSTAR_USE_IDT77105 | |
904 | if (card->max_pcr == ATM_25_PCR) | |
905 | idt77105_init(card->atmdev); | |
906 | #endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */ | |
907 | ||
908 | if (card->atmdev->phy && card->atmdev->phy->start) | |
909 | card->atmdev->phy->start(card->atmdev); | |
910 | ||
911 | writel(NS_CFG_RXPATH | | |
912 | NS_CFG_SMBUFSIZE | | |
913 | NS_CFG_LGBUFSIZE | | |
914 | NS_CFG_EFBIE | | |
915 | NS_CFG_RSQSIZE | | |
916 | NS_CFG_VPIBITS | | |
917 | ns_cfg_rctsize | | |
918 | NS_CFG_RXINT_NODELAY | | |
919 | NS_CFG_RAWIE | /* Only enabled if RCQ_SUPPORT */ | |
920 | NS_CFG_RSQAFIE | | |
921 | NS_CFG_TXEN | | |
922 | NS_CFG_TXIE | | |
923 | NS_CFG_TSQFIE_OPT | /* Only enabled if ENABLE_TSQFIE */ | |
924 | NS_CFG_PHYIE, | |
925 | card->membase + CFG); | |
926 | ||
927 | num_cards++; | |
928 | ||
929 | return error; | |
930 | } | |
931 | ||
932 | ||
933 | ||
934 | static void __devinit ns_init_card_error(ns_dev *card, int error) | |
935 | { | |
936 | if (error >= 17) | |
937 | { | |
938 | writel(0x00000000, card->membase + CFG); | |
939 | } | |
940 | if (error >= 16) | |
941 | { | |
942 | struct sk_buff *iovb; | |
943 | while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) | |
944 | dev_kfree_skb_any(iovb); | |
945 | } | |
946 | if (error >= 15) | |
947 | { | |
948 | struct sk_buff *sb; | |
949 | while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL) | |
950 | dev_kfree_skb_any(sb); | |
951 | free_scq(card->scq0, NULL); | |
952 | } | |
953 | if (error >= 14) | |
954 | { | |
955 | struct sk_buff *lb; | |
956 | while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL) | |
957 | dev_kfree_skb_any(lb); | |
958 | } | |
959 | if (error >= 13) | |
960 | { | |
961 | struct sk_buff *hb; | |
962 | while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) | |
963 | dev_kfree_skb_any(hb); | |
964 | } | |
965 | if (error >= 12) | |
966 | { | |
967 | kfree(card->rsq.org); | |
968 | } | |
969 | if (error >= 11) | |
970 | { | |
971 | kfree(card->tsq.org); | |
972 | } | |
973 | if (error >= 10) | |
974 | { | |
975 | free_irq(card->pcidev->irq, card); | |
976 | } | |
977 | if (error >= 4) | |
978 | { | |
979 | iounmap(card->membase); | |
980 | } | |
981 | if (error >= 3) | |
982 | { | |
983 | pci_disable_device(card->pcidev); | |
984 | kfree(card); | |
985 | } | |
986 | } | |
987 | ||
988 | ||
989 | ||
990 | static scq_info *get_scq(int size, u32 scd) | |
991 | { | |
992 | scq_info *scq; | |
993 | int i; | |
994 | ||
995 | if (size != VBR_SCQSIZE && size != CBR_SCQSIZE) | |
996 | return (scq_info *) NULL; | |
997 | ||
998 | scq = (scq_info *) kmalloc(sizeof(scq_info), GFP_KERNEL); | |
999 | if (scq == (scq_info *) NULL) | |
1000 | return (scq_info *) NULL; | |
1001 | scq->org = kmalloc(2 * size, GFP_KERNEL); | |
1002 | if (scq->org == NULL) | |
1003 | { | |
1004 | kfree(scq); | |
1005 | return (scq_info *) NULL; | |
1006 | } | |
1007 | scq->skb = (struct sk_buff **) kmalloc(sizeof(struct sk_buff *) * | |
1008 | (size / NS_SCQE_SIZE), GFP_KERNEL); | |
1009 | if (scq->skb == (struct sk_buff **) NULL) | |
1010 | { | |
1011 | kfree(scq->org); | |
1012 | kfree(scq); | |
1013 | return (scq_info *) NULL; | |
1014 | } | |
1015 | scq->num_entries = size / NS_SCQE_SIZE; | |
1016 | scq->base = (ns_scqe *) ALIGN_ADDRESS(scq->org, size); | |
1017 | scq->next = scq->base; | |
1018 | scq->last = scq->base + (scq->num_entries - 1); | |
1019 | scq->tail = scq->last; | |
1020 | scq->scd = scd; | |
1021 | scq->num_entries = size / NS_SCQE_SIZE; | |
1022 | scq->tbd_count = 0; | |
1023 | init_waitqueue_head(&scq->scqfull_waitq); | |
1024 | scq->full = 0; | |
1025 | spin_lock_init(&scq->lock); | |
1026 | ||
1027 | for (i = 0; i < scq->num_entries; i++) | |
1028 | scq->skb[i] = NULL; | |
1029 | ||
1030 | return scq; | |
1031 | } | |
1032 | ||
1033 | ||
1034 | ||
1035 | /* For variable rate SCQ vcc must be NULL */ | |
1036 | static void free_scq(scq_info *scq, struct atm_vcc *vcc) | |
1037 | { | |
1038 | int i; | |
1039 | ||
1040 | if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) | |
1041 | for (i = 0; i < scq->num_entries; i++) | |
1042 | { | |
1043 | if (scq->skb[i] != NULL) | |
1044 | { | |
1045 | vcc = ATM_SKB(scq->skb[i])->vcc; | |
1046 | if (vcc->pop != NULL) | |
1047 | vcc->pop(vcc, scq->skb[i]); | |
1048 | else | |
1049 | dev_kfree_skb_any(scq->skb[i]); | |
1050 | } | |
1051 | } | |
1052 | else /* vcc must be != NULL */ | |
1053 | { | |
1054 | if (vcc == NULL) | |
1055 | { | |
1056 | printk("nicstar: free_scq() called with vcc == NULL for fixed rate scq."); | |
1057 | for (i = 0; i < scq->num_entries; i++) | |
1058 | dev_kfree_skb_any(scq->skb[i]); | |
1059 | } | |
1060 | else | |
1061 | for (i = 0; i < scq->num_entries; i++) | |
1062 | { | |
1063 | if (scq->skb[i] != NULL) | |
1064 | { | |
1065 | if (vcc->pop != NULL) | |
1066 | vcc->pop(vcc, scq->skb[i]); | |
1067 | else | |
1068 | dev_kfree_skb_any(scq->skb[i]); | |
1069 | } | |
1070 | } | |
1071 | } | |
1072 | kfree(scq->skb); | |
1073 | kfree(scq->org); | |
1074 | kfree(scq); | |
1075 | } | |
1076 | ||
1077 | ||
1078 | ||
1079 | /* The handles passed must be pointers to the sk_buff containing the small | |
1080 | or large buffer(s) cast to u32. */ | |
1081 | static void push_rxbufs(ns_dev *card, u32 type, u32 handle1, u32 addr1, | |
1082 | u32 handle2, u32 addr2) | |
1083 | { | |
1084 | u32 stat; | |
1085 | unsigned long flags; | |
1086 | ||
1087 | ||
1088 | #ifdef GENERAL_DEBUG | |
1089 | if (!addr1) | |
1090 | printk("nicstar%d: push_rxbufs called with addr1 = 0.\n", card->index); | |
1091 | #endif /* GENERAL_DEBUG */ | |
1092 | ||
1093 | stat = readl(card->membase + STAT); | |
1094 | card->sbfqc = ns_stat_sfbqc_get(stat); | |
1095 | card->lbfqc = ns_stat_lfbqc_get(stat); | |
1096 | if (type == BUF_SM) | |
1097 | { | |
1098 | if (!addr2) | |
1099 | { | |
1100 | if (card->sm_addr) | |
1101 | { | |
1102 | addr2 = card->sm_addr; | |
1103 | handle2 = card->sm_handle; | |
1104 | card->sm_addr = 0x00000000; | |
1105 | card->sm_handle = 0x00000000; | |
1106 | } | |
1107 | else /* (!sm_addr) */ | |
1108 | { | |
1109 | card->sm_addr = addr1; | |
1110 | card->sm_handle = handle1; | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | else /* type == BUF_LG */ | |
1115 | { | |
1116 | if (!addr2) | |
1117 | { | |
1118 | if (card->lg_addr) | |
1119 | { | |
1120 | addr2 = card->lg_addr; | |
1121 | handle2 = card->lg_handle; | |
1122 | card->lg_addr = 0x00000000; | |
1123 | card->lg_handle = 0x00000000; | |
1124 | } | |
1125 | else /* (!lg_addr) */ | |
1126 | { | |
1127 | card->lg_addr = addr1; | |
1128 | card->lg_handle = handle1; | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | if (addr2) | |
1134 | { | |
1135 | if (type == BUF_SM) | |
1136 | { | |
1137 | if (card->sbfqc >= card->sbnr.max) | |
1138 | { | |
1139 | skb_unlink((struct sk_buff *) handle1); | |
1140 | dev_kfree_skb_any((struct sk_buff *) handle1); | |
1141 | skb_unlink((struct sk_buff *) handle2); | |
1142 | dev_kfree_skb_any((struct sk_buff *) handle2); | |
1143 | return; | |
1144 | } | |
1145 | else | |
1146 | card->sbfqc += 2; | |
1147 | } | |
1148 | else /* (type == BUF_LG) */ | |
1149 | { | |
1150 | if (card->lbfqc >= card->lbnr.max) | |
1151 | { | |
1152 | skb_unlink((struct sk_buff *) handle1); | |
1153 | dev_kfree_skb_any((struct sk_buff *) handle1); | |
1154 | skb_unlink((struct sk_buff *) handle2); | |
1155 | dev_kfree_skb_any((struct sk_buff *) handle2); | |
1156 | return; | |
1157 | } | |
1158 | else | |
1159 | card->lbfqc += 2; | |
1160 | } | |
1161 | ||
1162 | ns_grab_res_lock(card, flags); | |
1163 | ||
1164 | while (CMD_BUSY(card)); | |
1165 | writel(addr2, card->membase + DR3); | |
1166 | writel(handle2, card->membase + DR2); | |
1167 | writel(addr1, card->membase + DR1); | |
1168 | writel(handle1, card->membase + DR0); | |
1169 | writel(NS_CMD_WRITE_FREEBUFQ | (u32) type, card->membase + CMD); | |
1170 | ||
1171 | spin_unlock_irqrestore(&card->res_lock, flags); | |
1172 | ||
1173 | XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n", card->index, | |
1174 | (type == BUF_SM ? "small" : "large"), addr1, addr2); | |
1175 | } | |
1176 | ||
1177 | if (!card->efbie && card->sbfqc >= card->sbnr.min && | |
1178 | card->lbfqc >= card->lbnr.min) | |
1179 | { | |
1180 | card->efbie = 1; | |
1181 | writel((readl(card->membase + CFG) | NS_CFG_EFBIE), card->membase + CFG); | |
1182 | } | |
1183 | ||
1184 | return; | |
1185 | } | |
1186 | ||
1187 | ||
1188 | ||
1189 | static irqreturn_t ns_irq_handler(int irq, void *dev_id, struct pt_regs *regs) | |
1190 | { | |
1191 | u32 stat_r; | |
1192 | ns_dev *card; | |
1193 | struct atm_dev *dev; | |
1194 | unsigned long flags; | |
1195 | ||
1196 | card = (ns_dev *) dev_id; | |
1197 | dev = card->atmdev; | |
1198 | card->intcnt++; | |
1199 | ||
1200 | PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index); | |
1201 | ||
1202 | ns_grab_int_lock(card, flags); | |
1203 | ||
1204 | stat_r = readl(card->membase + STAT); | |
1205 | ||
1206 | /* Transmit Status Indicator has been written to T. S. Queue */ | |
1207 | if (stat_r & NS_STAT_TSIF) | |
1208 | { | |
1209 | TXPRINTK("nicstar%d: TSI interrupt\n", card->index); | |
1210 | process_tsq(card); | |
1211 | writel(NS_STAT_TSIF, card->membase + STAT); | |
1212 | } | |
1213 | ||
1214 | /* Incomplete CS-PDU has been transmitted */ | |
1215 | if (stat_r & NS_STAT_TXICP) | |
1216 | { | |
1217 | writel(NS_STAT_TXICP, card->membase + STAT); | |
1218 | TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n", | |
1219 | card->index); | |
1220 | } | |
1221 | ||
1222 | /* Transmit Status Queue 7/8 full */ | |
1223 | if (stat_r & NS_STAT_TSQF) | |
1224 | { | |
1225 | writel(NS_STAT_TSQF, card->membase + STAT); | |
1226 | PRINTK("nicstar%d: TSQ full.\n", card->index); | |
1227 | process_tsq(card); | |
1228 | } | |
1229 | ||
1230 | /* Timer overflow */ | |
1231 | if (stat_r & NS_STAT_TMROF) | |
1232 | { | |
1233 | writel(NS_STAT_TMROF, card->membase + STAT); | |
1234 | PRINTK("nicstar%d: Timer overflow.\n", card->index); | |
1235 | } | |
1236 | ||
1237 | /* PHY device interrupt signal active */ | |
1238 | if (stat_r & NS_STAT_PHYI) | |
1239 | { | |
1240 | writel(NS_STAT_PHYI, card->membase + STAT); | |
1241 | PRINTK("nicstar%d: PHY interrupt.\n", card->index); | |
1242 | if (dev->phy && dev->phy->interrupt) { | |
1243 | dev->phy->interrupt(dev); | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | /* Small Buffer Queue is full */ | |
1248 | if (stat_r & NS_STAT_SFBQF) | |
1249 | { | |
1250 | writel(NS_STAT_SFBQF, card->membase + STAT); | |
1251 | printk("nicstar%d: Small free buffer queue is full.\n", card->index); | |
1252 | } | |
1253 | ||
1254 | /* Large Buffer Queue is full */ | |
1255 | if (stat_r & NS_STAT_LFBQF) | |
1256 | { | |
1257 | writel(NS_STAT_LFBQF, card->membase + STAT); | |
1258 | printk("nicstar%d: Large free buffer queue is full.\n", card->index); | |
1259 | } | |
1260 | ||
1261 | /* Receive Status Queue is full */ | |
1262 | if (stat_r & NS_STAT_RSQF) | |
1263 | { | |
1264 | writel(NS_STAT_RSQF, card->membase + STAT); | |
1265 | printk("nicstar%d: RSQ full.\n", card->index); | |
1266 | process_rsq(card); | |
1267 | } | |
1268 | ||
1269 | /* Complete CS-PDU received */ | |
1270 | if (stat_r & NS_STAT_EOPDU) | |
1271 | { | |
1272 | RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index); | |
1273 | process_rsq(card); | |
1274 | writel(NS_STAT_EOPDU, card->membase + STAT); | |
1275 | } | |
1276 | ||
1277 | /* Raw cell received */ | |
1278 | if (stat_r & NS_STAT_RAWCF) | |
1279 | { | |
1280 | writel(NS_STAT_RAWCF, card->membase + STAT); | |
1281 | #ifndef RCQ_SUPPORT | |
1282 | printk("nicstar%d: Raw cell received and no support yet...\n", | |
1283 | card->index); | |
1284 | #endif /* RCQ_SUPPORT */ | |
1285 | /* NOTE: the following procedure may keep a raw cell pending until the | |
1286 | next interrupt. As this preliminary support is only meant to | |
1287 | avoid buffer leakage, this is not an issue. */ | |
1288 | while (readl(card->membase + RAWCT) != card->rawch) | |
1289 | { | |
1290 | ns_rcqe *rawcell; | |
1291 | ||
1292 | rawcell = (ns_rcqe *) bus_to_virt(card->rawch); | |
1293 | if (ns_rcqe_islast(rawcell)) | |
1294 | { | |
1295 | struct sk_buff *oldbuf; | |
1296 | ||
1297 | oldbuf = card->rcbuf; | |
1298 | card->rcbuf = (struct sk_buff *) ns_rcqe_nextbufhandle(rawcell); | |
1299 | card->rawch = (u32) virt_to_bus(card->rcbuf->data); | |
1300 | recycle_rx_buf(card, oldbuf); | |
1301 | } | |
1302 | else | |
1303 | card->rawch += NS_RCQE_SIZE; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | /* Small buffer queue is empty */ | |
1308 | if (stat_r & NS_STAT_SFBQE) | |
1309 | { | |
1310 | int i; | |
1311 | struct sk_buff *sb; | |
1312 | ||
1313 | writel(NS_STAT_SFBQE, card->membase + STAT); | |
1314 | printk("nicstar%d: Small free buffer queue empty.\n", | |
1315 | card->index); | |
1316 | for (i = 0; i < card->sbnr.min; i++) | |
1317 | { | |
1318 | sb = dev_alloc_skb(NS_SMSKBSIZE); | |
1319 | if (sb == NULL) | |
1320 | { | |
1321 | writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG); | |
1322 | card->efbie = 0; | |
1323 | break; | |
1324 | } | |
1325 | skb_queue_tail(&card->sbpool.queue, sb); | |
1326 | skb_reserve(sb, NS_AAL0_HEADER); | |
1327 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0); | |
1328 | } | |
1329 | card->sbfqc = i; | |
1330 | process_rsq(card); | |
1331 | } | |
1332 | ||
1333 | /* Large buffer queue empty */ | |
1334 | if (stat_r & NS_STAT_LFBQE) | |
1335 | { | |
1336 | int i; | |
1337 | struct sk_buff *lb; | |
1338 | ||
1339 | writel(NS_STAT_LFBQE, card->membase + STAT); | |
1340 | printk("nicstar%d: Large free buffer queue empty.\n", | |
1341 | card->index); | |
1342 | for (i = 0; i < card->lbnr.min; i++) | |
1343 | { | |
1344 | lb = dev_alloc_skb(NS_LGSKBSIZE); | |
1345 | if (lb == NULL) | |
1346 | { | |
1347 | writel(readl(card->membase + CFG) & ~NS_CFG_EFBIE, card->membase + CFG); | |
1348 | card->efbie = 0; | |
1349 | break; | |
1350 | } | |
1351 | skb_queue_tail(&card->lbpool.queue, lb); | |
1352 | skb_reserve(lb, NS_SMBUFSIZE); | |
1353 | push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0); | |
1354 | } | |
1355 | card->lbfqc = i; | |
1356 | process_rsq(card); | |
1357 | } | |
1358 | ||
1359 | /* Receive Status Queue is 7/8 full */ | |
1360 | if (stat_r & NS_STAT_RSQAF) | |
1361 | { | |
1362 | writel(NS_STAT_RSQAF, card->membase + STAT); | |
1363 | RXPRINTK("nicstar%d: RSQ almost full.\n", card->index); | |
1364 | process_rsq(card); | |
1365 | } | |
1366 | ||
1367 | spin_unlock_irqrestore(&card->int_lock, flags); | |
1368 | PRINTK("nicstar%d: end of interrupt service\n", card->index); | |
1369 | return IRQ_HANDLED; | |
1370 | } | |
1371 | ||
1372 | ||
1373 | ||
1374 | static int ns_open(struct atm_vcc *vcc) | |
1375 | { | |
1376 | ns_dev *card; | |
1377 | vc_map *vc; | |
1378 | unsigned long tmpl, modl; | |
1379 | int tcr, tcra; /* target cell rate, and absolute value */ | |
1380 | int n = 0; /* Number of entries in the TST. Initialized to remove | |
1381 | the compiler warning. */ | |
1382 | u32 u32d[4]; | |
1383 | int frscdi = 0; /* Index of the SCD. Initialized to remove the compiler | |
1384 | warning. How I wish compilers were clever enough to | |
1385 | tell which variables can truly be used | |
1386 | uninitialized... */ | |
1387 | int inuse; /* tx or rx vc already in use by another vcc */ | |
1388 | short vpi = vcc->vpi; | |
1389 | int vci = vcc->vci; | |
1390 | ||
1391 | card = (ns_dev *) vcc->dev->dev_data; | |
1392 | PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int) vpi, vci); | |
1393 | if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) | |
1394 | { | |
1395 | PRINTK("nicstar%d: unsupported AAL.\n", card->index); | |
1396 | return -EINVAL; | |
1397 | } | |
1398 | ||
1399 | vc = &(card->vcmap[vpi << card->vcibits | vci]); | |
1400 | vcc->dev_data = vc; | |
1401 | ||
1402 | inuse = 0; | |
1403 | if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx) | |
1404 | inuse = 1; | |
1405 | if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx) | |
1406 | inuse += 2; | |
1407 | if (inuse) | |
1408 | { | |
1409 | printk("nicstar%d: %s vci already in use.\n", card->index, | |
1410 | inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx"); | |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
1414 | set_bit(ATM_VF_ADDR,&vcc->flags); | |
1415 | ||
1416 | /* NOTE: You are not allowed to modify an open connection's QOS. To change | |
1417 | that, remove the ATM_VF_PARTIAL flag checking. There may be other changes | |
1418 | needed to do that. */ | |
1419 | if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) | |
1420 | { | |
1421 | scq_info *scq; | |
1422 | ||
1423 | set_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1424 | if (vcc->qos.txtp.traffic_class == ATM_CBR) | |
1425 | { | |
1426 | /* Check requested cell rate and availability of SCD */ | |
1427 | if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0 && | |
1428 | vcc->qos.txtp.min_pcr == 0) | |
1429 | { | |
1430 | PRINTK("nicstar%d: trying to open a CBR vc with cell rate = 0 \n", | |
1431 | card->index); | |
1432 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1433 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1434 | return -EINVAL; | |
1435 | } | |
1436 | ||
1437 | tcr = atm_pcr_goal(&(vcc->qos.txtp)); | |
1438 | tcra = tcr >= 0 ? tcr : -tcr; | |
1439 | ||
1440 | PRINTK("nicstar%d: target cell rate = %d.\n", card->index, | |
1441 | vcc->qos.txtp.max_pcr); | |
1442 | ||
1443 | tmpl = (unsigned long)tcra * (unsigned long)NS_TST_NUM_ENTRIES; | |
1444 | modl = tmpl % card->max_pcr; | |
1445 | ||
1446 | n = (int)(tmpl / card->max_pcr); | |
1447 | if (tcr > 0) | |
1448 | { | |
1449 | if (modl > 0) n++; | |
1450 | } | |
1451 | else if (tcr == 0) | |
1452 | { | |
1453 | if ((n = (card->tst_free_entries - NS_TST_RESERVED)) <= 0) | |
1454 | { | |
1455 | PRINTK("nicstar%d: no CBR bandwidth free.\n", card->index); | |
1456 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1457 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1458 | return -EINVAL; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | if (n == 0) | |
1463 | { | |
1464 | printk("nicstar%d: selected bandwidth < granularity.\n", card->index); | |
1465 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1466 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1467 | return -EINVAL; | |
1468 | } | |
1469 | ||
1470 | if (n > (card->tst_free_entries - NS_TST_RESERVED)) | |
1471 | { | |
1472 | PRINTK("nicstar%d: not enough free CBR bandwidth.\n", card->index); | |
1473 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1474 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1475 | return -EINVAL; | |
1476 | } | |
1477 | else | |
1478 | card->tst_free_entries -= n; | |
1479 | ||
1480 | XPRINTK("nicstar%d: writing %d tst entries.\n", card->index, n); | |
1481 | for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) | |
1482 | { | |
1483 | if (card->scd2vc[frscdi] == NULL) | |
1484 | { | |
1485 | card->scd2vc[frscdi] = vc; | |
1486 | break; | |
1487 | } | |
1488 | } | |
1489 | if (frscdi == NS_FRSCD_NUM) | |
1490 | { | |
1491 | PRINTK("nicstar%d: no SCD available for CBR channel.\n", card->index); | |
1492 | card->tst_free_entries += n; | |
1493 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1494 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1495 | return -EBUSY; | |
1496 | } | |
1497 | ||
1498 | vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE; | |
1499 | ||
1500 | scq = get_scq(CBR_SCQSIZE, vc->cbr_scd); | |
1501 | if (scq == (scq_info *) NULL) | |
1502 | { | |
1503 | PRINTK("nicstar%d: can't get fixed rate SCQ.\n", card->index); | |
1504 | card->scd2vc[frscdi] = NULL; | |
1505 | card->tst_free_entries += n; | |
1506 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1507 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1508 | return -ENOMEM; | |
1509 | } | |
1510 | vc->scq = scq; | |
1511 | u32d[0] = (u32) virt_to_bus(scq->base); | |
1512 | u32d[1] = (u32) 0x00000000; | |
1513 | u32d[2] = (u32) 0xffffffff; | |
1514 | u32d[3] = (u32) 0x00000000; | |
1515 | ns_write_sram(card, vc->cbr_scd, u32d, 4); | |
1516 | ||
1517 | fill_tst(card, n, vc); | |
1518 | } | |
1519 | else if (vcc->qos.txtp.traffic_class == ATM_UBR) | |
1520 | { | |
1521 | vc->cbr_scd = 0x00000000; | |
1522 | vc->scq = card->scq0; | |
1523 | } | |
1524 | ||
1525 | if (vcc->qos.txtp.traffic_class != ATM_NONE) | |
1526 | { | |
1527 | vc->tx = 1; | |
1528 | vc->tx_vcc = vcc; | |
1529 | vc->tbd_count = 0; | |
1530 | } | |
1531 | if (vcc->qos.rxtp.traffic_class != ATM_NONE) | |
1532 | { | |
1533 | u32 status; | |
1534 | ||
1535 | vc->rx = 1; | |
1536 | vc->rx_vcc = vcc; | |
1537 | vc->rx_iov = NULL; | |
1538 | ||
1539 | /* Open the connection in hardware */ | |
1540 | if (vcc->qos.aal == ATM_AAL5) | |
1541 | status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN; | |
1542 | else /* vcc->qos.aal == ATM_AAL0 */ | |
1543 | status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN; | |
1544 | #ifdef RCQ_SUPPORT | |
1545 | status |= NS_RCTE_RAWCELLINTEN; | |
1546 | #endif /* RCQ_SUPPORT */ | |
1547 | ns_write_sram(card, NS_RCT + (vpi << card->vcibits | vci) * | |
1548 | NS_RCT_ENTRY_SIZE, &status, 1); | |
1549 | } | |
1550 | ||
1551 | } | |
1552 | ||
1553 | set_bit(ATM_VF_READY,&vcc->flags); | |
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | ||
1558 | ||
1559 | static void ns_close(struct atm_vcc *vcc) | |
1560 | { | |
1561 | vc_map *vc; | |
1562 | ns_dev *card; | |
1563 | u32 data; | |
1564 | int i; | |
1565 | ||
1566 | vc = vcc->dev_data; | |
1567 | card = vcc->dev->dev_data; | |
1568 | PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index, | |
1569 | (int) vcc->vpi, vcc->vci); | |
1570 | ||
1571 | clear_bit(ATM_VF_READY,&vcc->flags); | |
1572 | ||
1573 | if (vcc->qos.rxtp.traffic_class != ATM_NONE) | |
1574 | { | |
1575 | u32 addr; | |
1576 | unsigned long flags; | |
1577 | ||
1578 | addr = NS_RCT + (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE; | |
1579 | ns_grab_res_lock(card, flags); | |
1580 | while(CMD_BUSY(card)); | |
1581 | writel(NS_CMD_CLOSE_CONNECTION | addr << 2, card->membase + CMD); | |
1582 | spin_unlock_irqrestore(&card->res_lock, flags); | |
1583 | ||
1584 | vc->rx = 0; | |
1585 | if (vc->rx_iov != NULL) | |
1586 | { | |
1587 | struct sk_buff *iovb; | |
1588 | u32 stat; | |
1589 | ||
1590 | stat = readl(card->membase + STAT); | |
1591 | card->sbfqc = ns_stat_sfbqc_get(stat); | |
1592 | card->lbfqc = ns_stat_lfbqc_get(stat); | |
1593 | ||
1594 | PRINTK("nicstar%d: closing a VC with pending rx buffers.\n", | |
1595 | card->index); | |
1596 | iovb = vc->rx_iov; | |
1597 | recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, | |
1598 | NS_SKB(iovb)->iovcnt); | |
1599 | NS_SKB(iovb)->iovcnt = 0; | |
1600 | NS_SKB(iovb)->vcc = NULL; | |
1601 | ns_grab_int_lock(card, flags); | |
1602 | recycle_iov_buf(card, iovb); | |
1603 | spin_unlock_irqrestore(&card->int_lock, flags); | |
1604 | vc->rx_iov = NULL; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | if (vcc->qos.txtp.traffic_class != ATM_NONE) | |
1609 | { | |
1610 | vc->tx = 0; | |
1611 | } | |
1612 | ||
1613 | if (vcc->qos.txtp.traffic_class == ATM_CBR) | |
1614 | { | |
1615 | unsigned long flags; | |
1616 | ns_scqe *scqep; | |
1617 | scq_info *scq; | |
1618 | ||
1619 | scq = vc->scq; | |
1620 | ||
1621 | for (;;) | |
1622 | { | |
1623 | ns_grab_scq_lock(card, scq, flags); | |
1624 | scqep = scq->next; | |
1625 | if (scqep == scq->base) | |
1626 | scqep = scq->last; | |
1627 | else | |
1628 | scqep--; | |
1629 | if (scqep == scq->tail) | |
1630 | { | |
1631 | spin_unlock_irqrestore(&scq->lock, flags); | |
1632 | break; | |
1633 | } | |
1634 | /* If the last entry is not a TSR, place one in the SCQ in order to | |
1635 | be able to completely drain it and then close. */ | |
1636 | if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) | |
1637 | { | |
1638 | ns_scqe tsr; | |
1639 | u32 scdi, scqi; | |
1640 | u32 data; | |
1641 | int index; | |
1642 | ||
1643 | tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE); | |
1644 | scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE; | |
1645 | scqi = scq->next - scq->base; | |
1646 | tsr.word_2 = ns_tsr_mkword_2(scdi, scqi); | |
1647 | tsr.word_3 = 0x00000000; | |
1648 | tsr.word_4 = 0x00000000; | |
1649 | *scq->next = tsr; | |
1650 | index = (int) scqi; | |
1651 | scq->skb[index] = NULL; | |
1652 | if (scq->next == scq->last) | |
1653 | scq->next = scq->base; | |
1654 | else | |
1655 | scq->next++; | |
1656 | data = (u32) virt_to_bus(scq->next); | |
1657 | ns_write_sram(card, scq->scd, &data, 1); | |
1658 | } | |
1659 | spin_unlock_irqrestore(&scq->lock, flags); | |
1660 | schedule(); | |
1661 | } | |
1662 | ||
1663 | /* Free all TST entries */ | |
1664 | data = NS_TST_OPCODE_VARIABLE; | |
1665 | for (i = 0; i < NS_TST_NUM_ENTRIES; i++) | |
1666 | { | |
1667 | if (card->tste2vc[i] == vc) | |
1668 | { | |
1669 | ns_write_sram(card, card->tst_addr + i, &data, 1); | |
1670 | card->tste2vc[i] = NULL; | |
1671 | card->tst_free_entries++; | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL; | |
1676 | free_scq(vc->scq, vcc); | |
1677 | } | |
1678 | ||
1679 | /* remove all references to vcc before deleting it */ | |
1680 | if (vcc->qos.txtp.traffic_class != ATM_NONE) | |
1681 | { | |
1682 | unsigned long flags; | |
1683 | scq_info *scq = card->scq0; | |
1684 | ||
1685 | ns_grab_scq_lock(card, scq, flags); | |
1686 | ||
1687 | for(i = 0; i < scq->num_entries; i++) { | |
1688 | if(scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) { | |
1689 | ATM_SKB(scq->skb[i])->vcc = NULL; | |
1690 | atm_return(vcc, scq->skb[i]->truesize); | |
1691 | PRINTK("nicstar: deleted pending vcc mapping\n"); | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | spin_unlock_irqrestore(&scq->lock, flags); | |
1696 | } | |
1697 | ||
1698 | vcc->dev_data = NULL; | |
1699 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
1700 | clear_bit(ATM_VF_ADDR,&vcc->flags); | |
1701 | ||
1702 | #ifdef RX_DEBUG | |
1703 | { | |
1704 | u32 stat, cfg; | |
1705 | stat = readl(card->membase + STAT); | |
1706 | cfg = readl(card->membase + CFG); | |
1707 | printk("STAT = 0x%08X CFG = 0x%08X \n", stat, cfg); | |
1708 | printk("TSQ: base = 0x%08X next = 0x%08X last = 0x%08X TSQT = 0x%08X \n", | |
1709 | (u32) card->tsq.base, (u32) card->tsq.next,(u32) card->tsq.last, | |
1710 | readl(card->membase + TSQT)); | |
1711 | printk("RSQ: base = 0x%08X next = 0x%08X last = 0x%08X RSQT = 0x%08X \n", | |
1712 | (u32) card->rsq.base, (u32) card->rsq.next,(u32) card->rsq.last, | |
1713 | readl(card->membase + RSQT)); | |
1714 | printk("Empty free buffer queue interrupt %s \n", | |
1715 | card->efbie ? "enabled" : "disabled"); | |
1716 | printk("SBCNT = %d count = %d LBCNT = %d count = %d \n", | |
1717 | ns_stat_sfbqc_get(stat), card->sbpool.count, | |
1718 | ns_stat_lfbqc_get(stat), card->lbpool.count); | |
1719 | printk("hbpool.count = %d iovpool.count = %d \n", | |
1720 | card->hbpool.count, card->iovpool.count); | |
1721 | } | |
1722 | #endif /* RX_DEBUG */ | |
1723 | } | |
1724 | ||
1725 | ||
1726 | ||
1727 | static void fill_tst(ns_dev *card, int n, vc_map *vc) | |
1728 | { | |
1729 | u32 new_tst; | |
1730 | unsigned long cl; | |
1731 | int e, r; | |
1732 | u32 data; | |
1733 | ||
1734 | /* It would be very complicated to keep the two TSTs synchronized while | |
1735 | assuring that writes are only made to the inactive TST. So, for now I | |
1736 | will use only one TST. If problems occur, I will change this again */ | |
1737 | ||
1738 | new_tst = card->tst_addr; | |
1739 | ||
1740 | /* Fill procedure */ | |
1741 | ||
1742 | for (e = 0; e < NS_TST_NUM_ENTRIES; e++) | |
1743 | { | |
1744 | if (card->tste2vc[e] == NULL) | |
1745 | break; | |
1746 | } | |
1747 | if (e == NS_TST_NUM_ENTRIES) { | |
1748 | printk("nicstar%d: No free TST entries found. \n", card->index); | |
1749 | return; | |
1750 | } | |
1751 | ||
1752 | r = n; | |
1753 | cl = NS_TST_NUM_ENTRIES; | |
1754 | data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd); | |
1755 | ||
1756 | while (r > 0) | |
1757 | { | |
1758 | if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) | |
1759 | { | |
1760 | card->tste2vc[e] = vc; | |
1761 | ns_write_sram(card, new_tst + e, &data, 1); | |
1762 | cl -= NS_TST_NUM_ENTRIES; | |
1763 | r--; | |
1764 | } | |
1765 | ||
1766 | if (++e == NS_TST_NUM_ENTRIES) { | |
1767 | e = 0; | |
1768 | } | |
1769 | cl += n; | |
1770 | } | |
1771 | ||
1772 | /* End of fill procedure */ | |
1773 | ||
1774 | data = ns_tste_make(NS_TST_OPCODE_END, new_tst); | |
1775 | ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1); | |
1776 | ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1); | |
1777 | card->tst_addr = new_tst; | |
1778 | } | |
1779 | ||
1780 | ||
1781 | ||
1782 | static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb) | |
1783 | { | |
1784 | ns_dev *card; | |
1785 | vc_map *vc; | |
1786 | scq_info *scq; | |
1787 | unsigned long buflen; | |
1788 | ns_scqe scqe; | |
1789 | u32 flags; /* TBD flags, not CPU flags */ | |
1790 | ||
1791 | card = vcc->dev->dev_data; | |
1792 | TXPRINTK("nicstar%d: ns_send() called.\n", card->index); | |
1793 | if ((vc = (vc_map *) vcc->dev_data) == NULL) | |
1794 | { | |
1795 | printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n", card->index); | |
1796 | atomic_inc(&vcc->stats->tx_err); | |
1797 | dev_kfree_skb_any(skb); | |
1798 | return -EINVAL; | |
1799 | } | |
1800 | ||
1801 | if (!vc->tx) | |
1802 | { | |
1803 | printk("nicstar%d: Trying to transmit on a non-tx VC.\n", card->index); | |
1804 | atomic_inc(&vcc->stats->tx_err); | |
1805 | dev_kfree_skb_any(skb); | |
1806 | return -EINVAL; | |
1807 | } | |
1808 | ||
1809 | if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) | |
1810 | { | |
1811 | printk("nicstar%d: Only AAL0 and AAL5 are supported.\n", card->index); | |
1812 | atomic_inc(&vcc->stats->tx_err); | |
1813 | dev_kfree_skb_any(skb); | |
1814 | return -EINVAL; | |
1815 | } | |
1816 | ||
1817 | if (skb_shinfo(skb)->nr_frags != 0) | |
1818 | { | |
1819 | printk("nicstar%d: No scatter-gather yet.\n", card->index); | |
1820 | atomic_inc(&vcc->stats->tx_err); | |
1821 | dev_kfree_skb_any(skb); | |
1822 | return -EINVAL; | |
1823 | } | |
1824 | ||
1825 | ATM_SKB(skb)->vcc = vcc; | |
1826 | ||
1827 | if (vcc->qos.aal == ATM_AAL5) | |
1828 | { | |
1829 | buflen = (skb->len + 47 + 8) / 48 * 48; /* Multiple of 48 */ | |
1830 | flags = NS_TBD_AAL5; | |
1831 | scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data)); | |
1832 | scqe.word_3 = cpu_to_le32((u32) skb->len); | |
1833 | scqe.word_4 = ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0, | |
1834 | ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? 1 : 0); | |
1835 | flags |= NS_TBD_EOPDU; | |
1836 | } | |
1837 | else /* (vcc->qos.aal == ATM_AAL0) */ | |
1838 | { | |
1839 | buflen = ATM_CELL_PAYLOAD; /* i.e., 48 bytes */ | |
1840 | flags = NS_TBD_AAL0; | |
1841 | scqe.word_2 = cpu_to_le32((u32) virt_to_bus(skb->data) + NS_AAL0_HEADER); | |
1842 | scqe.word_3 = cpu_to_le32(0x00000000); | |
1843 | if (*skb->data & 0x02) /* Payload type 1 - end of pdu */ | |
1844 | flags |= NS_TBD_EOPDU; | |
1845 | scqe.word_4 = cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK); | |
1846 | /* Force the VPI/VCI to be the same as in VCC struct */ | |
1847 | scqe.word_4 |= cpu_to_le32((((u32) vcc->vpi) << NS_TBD_VPI_SHIFT | | |
1848 | ((u32) vcc->vci) << NS_TBD_VCI_SHIFT) & | |
1849 | NS_TBD_VC_MASK); | |
1850 | } | |
1851 | ||
1852 | if (vcc->qos.txtp.traffic_class == ATM_CBR) | |
1853 | { | |
1854 | scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen); | |
1855 | scq = ((vc_map *) vcc->dev_data)->scq; | |
1856 | } | |
1857 | else | |
1858 | { | |
1859 | scqe.word_1 = ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen); | |
1860 | scq = card->scq0; | |
1861 | } | |
1862 | ||
1863 | if (push_scqe(card, vc, scq, &scqe, skb) != 0) | |
1864 | { | |
1865 | atomic_inc(&vcc->stats->tx_err); | |
1866 | dev_kfree_skb_any(skb); | |
1867 | return -EIO; | |
1868 | } | |
1869 | atomic_inc(&vcc->stats->tx); | |
1870 | ||
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | ||
1875 | ||
1876 | static int push_scqe(ns_dev *card, vc_map *vc, scq_info *scq, ns_scqe *tbd, | |
1877 | struct sk_buff *skb) | |
1878 | { | |
1879 | unsigned long flags; | |
1880 | ns_scqe tsr; | |
1881 | u32 scdi, scqi; | |
1882 | int scq_is_vbr; | |
1883 | u32 data; | |
1884 | int index; | |
1885 | ||
1886 | ns_grab_scq_lock(card, scq, flags); | |
1887 | while (scq->tail == scq->next) | |
1888 | { | |
1889 | if (in_interrupt()) { | |
1890 | spin_unlock_irqrestore(&scq->lock, flags); | |
1891 | printk("nicstar%d: Error pushing TBD.\n", card->index); | |
1892 | return 1; | |
1893 | } | |
1894 | ||
1895 | scq->full = 1; | |
1896 | spin_unlock_irqrestore(&scq->lock, flags); | |
1897 | interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT); | |
1898 | ns_grab_scq_lock(card, scq, flags); | |
1899 | ||
1900 | if (scq->full) { | |
1901 | spin_unlock_irqrestore(&scq->lock, flags); | |
1902 | printk("nicstar%d: Timeout pushing TBD.\n", card->index); | |
1903 | return 1; | |
1904 | } | |
1905 | } | |
1906 | *scq->next = *tbd; | |
1907 | index = (int) (scq->next - scq->base); | |
1908 | scq->skb[index] = skb; | |
1909 | XPRINTK("nicstar%d: sending skb at 0x%x (pos %d).\n", | |
1910 | card->index, (u32) skb, index); | |
1911 | XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n", | |
1912 | card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2), | |
1913 | le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4), | |
1914 | (u32) scq->next); | |
1915 | if (scq->next == scq->last) | |
1916 | scq->next = scq->base; | |
1917 | else | |
1918 | scq->next++; | |
1919 | ||
1920 | vc->tbd_count++; | |
1921 | if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) | |
1922 | { | |
1923 | scq->tbd_count++; | |
1924 | scq_is_vbr = 1; | |
1925 | } | |
1926 | else | |
1927 | scq_is_vbr = 0; | |
1928 | ||
1929 | if (vc->tbd_count >= MAX_TBD_PER_VC || scq->tbd_count >= MAX_TBD_PER_SCQ) | |
1930 | { | |
1931 | int has_run = 0; | |
1932 | ||
1933 | while (scq->tail == scq->next) | |
1934 | { | |
1935 | if (in_interrupt()) { | |
1936 | data = (u32) virt_to_bus(scq->next); | |
1937 | ns_write_sram(card, scq->scd, &data, 1); | |
1938 | spin_unlock_irqrestore(&scq->lock, flags); | |
1939 | printk("nicstar%d: Error pushing TSR.\n", card->index); | |
1940 | return 0; | |
1941 | } | |
1942 | ||
1943 | scq->full = 1; | |
1944 | if (has_run++) break; | |
1945 | spin_unlock_irqrestore(&scq->lock, flags); | |
1946 | interruptible_sleep_on_timeout(&scq->scqfull_waitq, SCQFULL_TIMEOUT); | |
1947 | ns_grab_scq_lock(card, scq, flags); | |
1948 | } | |
1949 | ||
1950 | if (!scq->full) | |
1951 | { | |
1952 | tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE); | |
1953 | if (scq_is_vbr) | |
1954 | scdi = NS_TSR_SCDISVBR; | |
1955 | else | |
1956 | scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE; | |
1957 | scqi = scq->next - scq->base; | |
1958 | tsr.word_2 = ns_tsr_mkword_2(scdi, scqi); | |
1959 | tsr.word_3 = 0x00000000; | |
1960 | tsr.word_4 = 0x00000000; | |
1961 | ||
1962 | *scq->next = tsr; | |
1963 | index = (int) scqi; | |
1964 | scq->skb[index] = NULL; | |
1965 | XPRINTK("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%x.\n", | |
1966 | card->index, le32_to_cpu(tsr.word_1), le32_to_cpu(tsr.word_2), | |
1967 | le32_to_cpu(tsr.word_3), le32_to_cpu(tsr.word_4), | |
1968 | (u32) scq->next); | |
1969 | if (scq->next == scq->last) | |
1970 | scq->next = scq->base; | |
1971 | else | |
1972 | scq->next++; | |
1973 | vc->tbd_count = 0; | |
1974 | scq->tbd_count = 0; | |
1975 | } | |
1976 | else | |
1977 | PRINTK("nicstar%d: Timeout pushing TSR.\n", card->index); | |
1978 | } | |
1979 | data = (u32) virt_to_bus(scq->next); | |
1980 | ns_write_sram(card, scq->scd, &data, 1); | |
1981 | ||
1982 | spin_unlock_irqrestore(&scq->lock, flags); | |
1983 | ||
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | ||
1988 | ||
1989 | static void process_tsq(ns_dev *card) | |
1990 | { | |
1991 | u32 scdi; | |
1992 | scq_info *scq; | |
1993 | ns_tsi *previous = NULL, *one_ahead, *two_ahead; | |
1994 | int serviced_entries; /* flag indicating at least on entry was serviced */ | |
1995 | ||
1996 | serviced_entries = 0; | |
1997 | ||
1998 | if (card->tsq.next == card->tsq.last) | |
1999 | one_ahead = card->tsq.base; | |
2000 | else | |
2001 | one_ahead = card->tsq.next + 1; | |
2002 | ||
2003 | if (one_ahead == card->tsq.last) | |
2004 | two_ahead = card->tsq.base; | |
2005 | else | |
2006 | two_ahead = one_ahead + 1; | |
2007 | ||
2008 | while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) || | |
2009 | !ns_tsi_isempty(two_ahead)) | |
2010 | /* At most two empty, as stated in the 77201 errata */ | |
2011 | { | |
2012 | serviced_entries = 1; | |
2013 | ||
2014 | /* Skip the one or two possible empty entries */ | |
2015 | while (ns_tsi_isempty(card->tsq.next)) { | |
2016 | if (card->tsq.next == card->tsq.last) | |
2017 | card->tsq.next = card->tsq.base; | |
2018 | else | |
2019 | card->tsq.next++; | |
2020 | } | |
2021 | ||
2022 | if (!ns_tsi_tmrof(card->tsq.next)) | |
2023 | { | |
2024 | scdi = ns_tsi_getscdindex(card->tsq.next); | |
2025 | if (scdi == NS_TSI_SCDISVBR) | |
2026 | scq = card->scq0; | |
2027 | else | |
2028 | { | |
2029 | if (card->scd2vc[scdi] == NULL) | |
2030 | { | |
2031 | printk("nicstar%d: could not find VC from SCD index.\n", | |
2032 | card->index); | |
2033 | ns_tsi_init(card->tsq.next); | |
2034 | return; | |
2035 | } | |
2036 | scq = card->scd2vc[scdi]->scq; | |
2037 | } | |
2038 | drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next)); | |
2039 | scq->full = 0; | |
2040 | wake_up_interruptible(&(scq->scqfull_waitq)); | |
2041 | } | |
2042 | ||
2043 | ns_tsi_init(card->tsq.next); | |
2044 | previous = card->tsq.next; | |
2045 | if (card->tsq.next == card->tsq.last) | |
2046 | card->tsq.next = card->tsq.base; | |
2047 | else | |
2048 | card->tsq.next++; | |
2049 | ||
2050 | if (card->tsq.next == card->tsq.last) | |
2051 | one_ahead = card->tsq.base; | |
2052 | else | |
2053 | one_ahead = card->tsq.next + 1; | |
2054 | ||
2055 | if (one_ahead == card->tsq.last) | |
2056 | two_ahead = card->tsq.base; | |
2057 | else | |
2058 | two_ahead = one_ahead + 1; | |
2059 | } | |
2060 | ||
2061 | if (serviced_entries) { | |
2062 | writel((((u32) previous) - ((u32) card->tsq.base)), | |
2063 | card->membase + TSQH); | |
2064 | } | |
2065 | } | |
2066 | ||
2067 | ||
2068 | ||
2069 | static void drain_scq(ns_dev *card, scq_info *scq, int pos) | |
2070 | { | |
2071 | struct atm_vcc *vcc; | |
2072 | struct sk_buff *skb; | |
2073 | int i; | |
2074 | unsigned long flags; | |
2075 | ||
2076 | XPRINTK("nicstar%d: drain_scq() called, scq at 0x%x, pos %d.\n", | |
2077 | card->index, (u32) scq, pos); | |
2078 | if (pos >= scq->num_entries) | |
2079 | { | |
2080 | printk("nicstar%d: Bad index on drain_scq().\n", card->index); | |
2081 | return; | |
2082 | } | |
2083 | ||
2084 | ns_grab_scq_lock(card, scq, flags); | |
2085 | i = (int) (scq->tail - scq->base); | |
2086 | if (++i == scq->num_entries) | |
2087 | i = 0; | |
2088 | while (i != pos) | |
2089 | { | |
2090 | skb = scq->skb[i]; | |
2091 | XPRINTK("nicstar%d: freeing skb at 0x%x (index %d).\n", | |
2092 | card->index, (u32) skb, i); | |
2093 | if (skb != NULL) | |
2094 | { | |
2095 | vcc = ATM_SKB(skb)->vcc; | |
2096 | if (vcc && vcc->pop != NULL) { | |
2097 | vcc->pop(vcc, skb); | |
2098 | } else { | |
2099 | dev_kfree_skb_irq(skb); | |
2100 | } | |
2101 | scq->skb[i] = NULL; | |
2102 | } | |
2103 | if (++i == scq->num_entries) | |
2104 | i = 0; | |
2105 | } | |
2106 | scq->tail = scq->base + pos; | |
2107 | spin_unlock_irqrestore(&scq->lock, flags); | |
2108 | } | |
2109 | ||
2110 | ||
2111 | ||
2112 | static void process_rsq(ns_dev *card) | |
2113 | { | |
2114 | ns_rsqe *previous; | |
2115 | ||
2116 | if (!ns_rsqe_valid(card->rsq.next)) | |
2117 | return; | |
2118 | while (ns_rsqe_valid(card->rsq.next)) | |
2119 | { | |
2120 | dequeue_rx(card, card->rsq.next); | |
2121 | ns_rsqe_init(card->rsq.next); | |
2122 | previous = card->rsq.next; | |
2123 | if (card->rsq.next == card->rsq.last) | |
2124 | card->rsq.next = card->rsq.base; | |
2125 | else | |
2126 | card->rsq.next++; | |
2127 | } | |
2128 | writel((((u32) previous) - ((u32) card->rsq.base)), | |
2129 | card->membase + RSQH); | |
2130 | } | |
2131 | ||
2132 | ||
2133 | ||
2134 | static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe) | |
2135 | { | |
2136 | u32 vpi, vci; | |
2137 | vc_map *vc; | |
2138 | struct sk_buff *iovb; | |
2139 | struct iovec *iov; | |
2140 | struct atm_vcc *vcc; | |
2141 | struct sk_buff *skb; | |
2142 | unsigned short aal5_len; | |
2143 | int len; | |
2144 | u32 stat; | |
2145 | ||
2146 | stat = readl(card->membase + STAT); | |
2147 | card->sbfqc = ns_stat_sfbqc_get(stat); | |
2148 | card->lbfqc = ns_stat_lfbqc_get(stat); | |
2149 | ||
2150 | skb = (struct sk_buff *) le32_to_cpu(rsqe->buffer_handle); | |
2151 | vpi = ns_rsqe_vpi(rsqe); | |
2152 | vci = ns_rsqe_vci(rsqe); | |
2153 | if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) | |
2154 | { | |
2155 | printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n", | |
2156 | card->index, vpi, vci); | |
2157 | recycle_rx_buf(card, skb); | |
2158 | return; | |
2159 | } | |
2160 | ||
2161 | vc = &(card->vcmap[vpi << card->vcibits | vci]); | |
2162 | if (!vc->rx) | |
2163 | { | |
2164 | RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n", | |
2165 | card->index, vpi, vci); | |
2166 | recycle_rx_buf(card, skb); | |
2167 | return; | |
2168 | } | |
2169 | ||
2170 | vcc = vc->rx_vcc; | |
2171 | ||
2172 | if (vcc->qos.aal == ATM_AAL0) | |
2173 | { | |
2174 | struct sk_buff *sb; | |
2175 | unsigned char *cell; | |
2176 | int i; | |
2177 | ||
2178 | cell = skb->data; | |
2179 | for (i = ns_rsqe_cellcount(rsqe); i; i--) | |
2180 | { | |
2181 | if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) | |
2182 | { | |
2183 | printk("nicstar%d: Can't allocate buffers for aal0.\n", | |
2184 | card->index); | |
2185 | atomic_add(i,&vcc->stats->rx_drop); | |
2186 | break; | |
2187 | } | |
2188 | if (!atm_charge(vcc, sb->truesize)) | |
2189 | { | |
2190 | RXPRINTK("nicstar%d: atm_charge() dropped aal0 packets.\n", | |
2191 | card->index); | |
2192 | atomic_add(i-1,&vcc->stats->rx_drop); /* already increased by 1 */ | |
2193 | dev_kfree_skb_any(sb); | |
2194 | break; | |
2195 | } | |
2196 | /* Rebuild the header */ | |
2197 | *((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 | | |
2198 | (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000); | |
2199 | if (i == 1 && ns_rsqe_eopdu(rsqe)) | |
2200 | *((u32 *) sb->data) |= 0x00000002; | |
2201 | skb_put(sb, NS_AAL0_HEADER); | |
2202 | memcpy(sb->tail, cell, ATM_CELL_PAYLOAD); | |
2203 | skb_put(sb, ATM_CELL_PAYLOAD); | |
2204 | ATM_SKB(sb)->vcc = vcc; | |
2205 | do_gettimeofday(&sb->stamp); | |
2206 | vcc->push(vcc, sb); | |
2207 | atomic_inc(&vcc->stats->rx); | |
2208 | cell += ATM_CELL_PAYLOAD; | |
2209 | } | |
2210 | ||
2211 | recycle_rx_buf(card, skb); | |
2212 | return; | |
2213 | } | |
2214 | ||
2215 | /* To reach this point, the AAL layer can only be AAL5 */ | |
2216 | ||
2217 | if ((iovb = vc->rx_iov) == NULL) | |
2218 | { | |
2219 | iovb = skb_dequeue(&(card->iovpool.queue)); | |
2220 | if (iovb == NULL) /* No buffers in the queue */ | |
2221 | { | |
2222 | iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC); | |
2223 | if (iovb == NULL) | |
2224 | { | |
2225 | printk("nicstar%d: Out of iovec buffers.\n", card->index); | |
2226 | atomic_inc(&vcc->stats->rx_drop); | |
2227 | recycle_rx_buf(card, skb); | |
2228 | return; | |
2229 | } | |
2230 | } | |
2231 | else | |
2232 | if (--card->iovpool.count < card->iovnr.min) | |
2233 | { | |
2234 | struct sk_buff *new_iovb; | |
2235 | if ((new_iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) | |
2236 | { | |
2237 | skb_queue_tail(&card->iovpool.queue, new_iovb); | |
2238 | card->iovpool.count++; | |
2239 | } | |
2240 | } | |
2241 | vc->rx_iov = iovb; | |
2242 | NS_SKB(iovb)->iovcnt = 0; | |
2243 | iovb->len = 0; | |
2244 | iovb->tail = iovb->data = iovb->head; | |
2245 | NS_SKB(iovb)->vcc = vcc; | |
2246 | /* IMPORTANT: a pointer to the sk_buff containing the small or large | |
2247 | buffer is stored as iovec base, NOT a pointer to the | |
2248 | small or large buffer itself. */ | |
2249 | } | |
2250 | else if (NS_SKB(iovb)->iovcnt >= NS_MAX_IOVECS) | |
2251 | { | |
2252 | printk("nicstar%d: received too big AAL5 SDU.\n", card->index); | |
2253 | atomic_inc(&vcc->stats->rx_err); | |
2254 | recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, NS_MAX_IOVECS); | |
2255 | NS_SKB(iovb)->iovcnt = 0; | |
2256 | iovb->len = 0; | |
2257 | iovb->tail = iovb->data = iovb->head; | |
2258 | NS_SKB(iovb)->vcc = vcc; | |
2259 | } | |
2260 | iov = &((struct iovec *) iovb->data)[NS_SKB(iovb)->iovcnt++]; | |
2261 | iov->iov_base = (void *) skb; | |
2262 | iov->iov_len = ns_rsqe_cellcount(rsqe) * 48; | |
2263 | iovb->len += iov->iov_len; | |
2264 | ||
2265 | if (NS_SKB(iovb)->iovcnt == 1) | |
2266 | { | |
2267 | if (skb->list != &card->sbpool.queue) | |
2268 | { | |
2269 | printk("nicstar%d: Expected a small buffer, and this is not one.\n", | |
2270 | card->index); | |
2271 | which_list(card, skb); | |
2272 | atomic_inc(&vcc->stats->rx_err); | |
2273 | recycle_rx_buf(card, skb); | |
2274 | vc->rx_iov = NULL; | |
2275 | recycle_iov_buf(card, iovb); | |
2276 | return; | |
2277 | } | |
2278 | } | |
2279 | else /* NS_SKB(iovb)->iovcnt >= 2 */ | |
2280 | { | |
2281 | if (skb->list != &card->lbpool.queue) | |
2282 | { | |
2283 | printk("nicstar%d: Expected a large buffer, and this is not one.\n", | |
2284 | card->index); | |
2285 | which_list(card, skb); | |
2286 | atomic_inc(&vcc->stats->rx_err); | |
2287 | recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, | |
2288 | NS_SKB(iovb)->iovcnt); | |
2289 | vc->rx_iov = NULL; | |
2290 | recycle_iov_buf(card, iovb); | |
2291 | return; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | if (ns_rsqe_eopdu(rsqe)) | |
2296 | { | |
2297 | /* This works correctly regardless of the endianness of the host */ | |
2298 | unsigned char *L1L2 = (unsigned char *)((u32)skb->data + | |
2299 | iov->iov_len - 6); | |
2300 | aal5_len = L1L2[0] << 8 | L1L2[1]; | |
2301 | len = (aal5_len == 0x0000) ? 0x10000 : aal5_len; | |
2302 | if (ns_rsqe_crcerr(rsqe) || | |
2303 | len + 8 > iovb->len || len + (47 + 8) < iovb->len) | |
2304 | { | |
2305 | printk("nicstar%d: AAL5 CRC error", card->index); | |
2306 | if (len + 8 > iovb->len || len + (47 + 8) < iovb->len) | |
2307 | printk(" - PDU size mismatch.\n"); | |
2308 | else | |
2309 | printk(".\n"); | |
2310 | atomic_inc(&vcc->stats->rx_err); | |
2311 | recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, | |
2312 | NS_SKB(iovb)->iovcnt); | |
2313 | vc->rx_iov = NULL; | |
2314 | recycle_iov_buf(card, iovb); | |
2315 | return; | |
2316 | } | |
2317 | ||
2318 | /* By this point we (hopefully) have a complete SDU without errors. */ | |
2319 | ||
2320 | if (NS_SKB(iovb)->iovcnt == 1) /* Just a small buffer */ | |
2321 | { | |
2322 | /* skb points to a small buffer */ | |
2323 | if (!atm_charge(vcc, skb->truesize)) | |
2324 | { | |
2325 | push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), | |
2326 | 0, 0); | |
2327 | atomic_inc(&vcc->stats->rx_drop); | |
2328 | } | |
2329 | else | |
2330 | { | |
2331 | skb_put(skb, len); | |
2332 | dequeue_sm_buf(card, skb); | |
2333 | #ifdef NS_USE_DESTRUCTORS | |
2334 | skb->destructor = ns_sb_destructor; | |
2335 | #endif /* NS_USE_DESTRUCTORS */ | |
2336 | ATM_SKB(skb)->vcc = vcc; | |
2337 | do_gettimeofday(&skb->stamp); | |
2338 | vcc->push(vcc, skb); | |
2339 | atomic_inc(&vcc->stats->rx); | |
2340 | } | |
2341 | } | |
2342 | else if (NS_SKB(iovb)->iovcnt == 2) /* One small plus one large buffer */ | |
2343 | { | |
2344 | struct sk_buff *sb; | |
2345 | ||
2346 | sb = (struct sk_buff *) (iov - 1)->iov_base; | |
2347 | /* skb points to a large buffer */ | |
2348 | ||
2349 | if (len <= NS_SMBUFSIZE) | |
2350 | { | |
2351 | if (!atm_charge(vcc, sb->truesize)) | |
2352 | { | |
2353 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), | |
2354 | 0, 0); | |
2355 | atomic_inc(&vcc->stats->rx_drop); | |
2356 | } | |
2357 | else | |
2358 | { | |
2359 | skb_put(sb, len); | |
2360 | dequeue_sm_buf(card, sb); | |
2361 | #ifdef NS_USE_DESTRUCTORS | |
2362 | sb->destructor = ns_sb_destructor; | |
2363 | #endif /* NS_USE_DESTRUCTORS */ | |
2364 | ATM_SKB(sb)->vcc = vcc; | |
2365 | do_gettimeofday(&sb->stamp); | |
2366 | vcc->push(vcc, sb); | |
2367 | atomic_inc(&vcc->stats->rx); | |
2368 | } | |
2369 | ||
2370 | push_rxbufs(card, BUF_LG, (u32) skb, | |
2371 | (u32) virt_to_bus(skb->data), 0, 0); | |
2372 | ||
2373 | } | |
2374 | else /* len > NS_SMBUFSIZE, the usual case */ | |
2375 | { | |
2376 | if (!atm_charge(vcc, skb->truesize)) | |
2377 | { | |
2378 | push_rxbufs(card, BUF_LG, (u32) skb, | |
2379 | (u32) virt_to_bus(skb->data), 0, 0); | |
2380 | atomic_inc(&vcc->stats->rx_drop); | |
2381 | } | |
2382 | else | |
2383 | { | |
2384 | dequeue_lg_buf(card, skb); | |
2385 | #ifdef NS_USE_DESTRUCTORS | |
2386 | skb->destructor = ns_lb_destructor; | |
2387 | #endif /* NS_USE_DESTRUCTORS */ | |
2388 | skb_push(skb, NS_SMBUFSIZE); | |
2389 | memcpy(skb->data, sb->data, NS_SMBUFSIZE); | |
2390 | skb_put(skb, len - NS_SMBUFSIZE); | |
2391 | ATM_SKB(skb)->vcc = vcc; | |
2392 | do_gettimeofday(&skb->stamp); | |
2393 | vcc->push(vcc, skb); | |
2394 | atomic_inc(&vcc->stats->rx); | |
2395 | } | |
2396 | ||
2397 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), | |
2398 | 0, 0); | |
2399 | ||
2400 | } | |
2401 | ||
2402 | } | |
2403 | else /* Must push a huge buffer */ | |
2404 | { | |
2405 | struct sk_buff *hb, *sb, *lb; | |
2406 | int remaining, tocopy; | |
2407 | int j; | |
2408 | ||
2409 | hb = skb_dequeue(&(card->hbpool.queue)); | |
2410 | if (hb == NULL) /* No buffers in the queue */ | |
2411 | { | |
2412 | ||
2413 | hb = dev_alloc_skb(NS_HBUFSIZE); | |
2414 | if (hb == NULL) | |
2415 | { | |
2416 | printk("nicstar%d: Out of huge buffers.\n", card->index); | |
2417 | atomic_inc(&vcc->stats->rx_drop); | |
2418 | recycle_iovec_rx_bufs(card, (struct iovec *) iovb->data, | |
2419 | NS_SKB(iovb)->iovcnt); | |
2420 | vc->rx_iov = NULL; | |
2421 | recycle_iov_buf(card, iovb); | |
2422 | return; | |
2423 | } | |
2424 | else if (card->hbpool.count < card->hbnr.min) | |
2425 | { | |
2426 | struct sk_buff *new_hb; | |
2427 | if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL) | |
2428 | { | |
2429 | skb_queue_tail(&card->hbpool.queue, new_hb); | |
2430 | card->hbpool.count++; | |
2431 | } | |
2432 | } | |
2433 | } | |
2434 | else | |
2435 | if (--card->hbpool.count < card->hbnr.min) | |
2436 | { | |
2437 | struct sk_buff *new_hb; | |
2438 | if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL) | |
2439 | { | |
2440 | skb_queue_tail(&card->hbpool.queue, new_hb); | |
2441 | card->hbpool.count++; | |
2442 | } | |
2443 | if (card->hbpool.count < card->hbnr.min) | |
2444 | { | |
2445 | if ((new_hb = dev_alloc_skb(NS_HBUFSIZE)) != NULL) | |
2446 | { | |
2447 | skb_queue_tail(&card->hbpool.queue, new_hb); | |
2448 | card->hbpool.count++; | |
2449 | } | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | iov = (struct iovec *) iovb->data; | |
2454 | ||
2455 | if (!atm_charge(vcc, hb->truesize)) | |
2456 | { | |
2457 | recycle_iovec_rx_bufs(card, iov, NS_SKB(iovb)->iovcnt); | |
2458 | if (card->hbpool.count < card->hbnr.max) | |
2459 | { | |
2460 | skb_queue_tail(&card->hbpool.queue, hb); | |
2461 | card->hbpool.count++; | |
2462 | } | |
2463 | else | |
2464 | dev_kfree_skb_any(hb); | |
2465 | atomic_inc(&vcc->stats->rx_drop); | |
2466 | } | |
2467 | else | |
2468 | { | |
2469 | /* Copy the small buffer to the huge buffer */ | |
2470 | sb = (struct sk_buff *) iov->iov_base; | |
2471 | memcpy(hb->data, sb->data, iov->iov_len); | |
2472 | skb_put(hb, iov->iov_len); | |
2473 | remaining = len - iov->iov_len; | |
2474 | iov++; | |
2475 | /* Free the small buffer */ | |
2476 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), | |
2477 | 0, 0); | |
2478 | ||
2479 | /* Copy all large buffers to the huge buffer and free them */ | |
2480 | for (j = 1; j < NS_SKB(iovb)->iovcnt; j++) | |
2481 | { | |
2482 | lb = (struct sk_buff *) iov->iov_base; | |
2483 | tocopy = min_t(int, remaining, iov->iov_len); | |
2484 | memcpy(hb->tail, lb->data, tocopy); | |
2485 | skb_put(hb, tocopy); | |
2486 | iov++; | |
2487 | remaining -= tocopy; | |
2488 | push_rxbufs(card, BUF_LG, (u32) lb, | |
2489 | (u32) virt_to_bus(lb->data), 0, 0); | |
2490 | } | |
2491 | #ifdef EXTRA_DEBUG | |
2492 | if (remaining != 0 || hb->len != len) | |
2493 | printk("nicstar%d: Huge buffer len mismatch.\n", card->index); | |
2494 | #endif /* EXTRA_DEBUG */ | |
2495 | ATM_SKB(hb)->vcc = vcc; | |
2496 | #ifdef NS_USE_DESTRUCTORS | |
2497 | hb->destructor = ns_hb_destructor; | |
2498 | #endif /* NS_USE_DESTRUCTORS */ | |
2499 | do_gettimeofday(&hb->stamp); | |
2500 | vcc->push(vcc, hb); | |
2501 | atomic_inc(&vcc->stats->rx); | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | vc->rx_iov = NULL; | |
2506 | recycle_iov_buf(card, iovb); | |
2507 | } | |
2508 | ||
2509 | } | |
2510 | ||
2511 | ||
2512 | ||
2513 | #ifdef NS_USE_DESTRUCTORS | |
2514 | ||
2515 | static void ns_sb_destructor(struct sk_buff *sb) | |
2516 | { | |
2517 | ns_dev *card; | |
2518 | u32 stat; | |
2519 | ||
2520 | card = (ns_dev *) ATM_SKB(sb)->vcc->dev->dev_data; | |
2521 | stat = readl(card->membase + STAT); | |
2522 | card->sbfqc = ns_stat_sfbqc_get(stat); | |
2523 | card->lbfqc = ns_stat_lfbqc_get(stat); | |
2524 | ||
2525 | do | |
2526 | { | |
2527 | sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL); | |
2528 | if (sb == NULL) | |
2529 | break; | |
2530 | skb_queue_tail(&card->sbpool.queue, sb); | |
2531 | skb_reserve(sb, NS_AAL0_HEADER); | |
2532 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0); | |
2533 | } while (card->sbfqc < card->sbnr.min); | |
2534 | } | |
2535 | ||
2536 | ||
2537 | ||
2538 | static void ns_lb_destructor(struct sk_buff *lb) | |
2539 | { | |
2540 | ns_dev *card; | |
2541 | u32 stat; | |
2542 | ||
2543 | card = (ns_dev *) ATM_SKB(lb)->vcc->dev->dev_data; | |
2544 | stat = readl(card->membase + STAT); | |
2545 | card->sbfqc = ns_stat_sfbqc_get(stat); | |
2546 | card->lbfqc = ns_stat_lfbqc_get(stat); | |
2547 | ||
2548 | do | |
2549 | { | |
2550 | lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL); | |
2551 | if (lb == NULL) | |
2552 | break; | |
2553 | skb_queue_tail(&card->lbpool.queue, lb); | |
2554 | skb_reserve(lb, NS_SMBUFSIZE); | |
2555 | push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0); | |
2556 | } while (card->lbfqc < card->lbnr.min); | |
2557 | } | |
2558 | ||
2559 | ||
2560 | ||
2561 | static void ns_hb_destructor(struct sk_buff *hb) | |
2562 | { | |
2563 | ns_dev *card; | |
2564 | ||
2565 | card = (ns_dev *) ATM_SKB(hb)->vcc->dev->dev_data; | |
2566 | ||
2567 | while (card->hbpool.count < card->hbnr.init) | |
2568 | { | |
2569 | hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL); | |
2570 | if (hb == NULL) | |
2571 | break; | |
2572 | skb_queue_tail(&card->hbpool.queue, hb); | |
2573 | card->hbpool.count++; | |
2574 | } | |
2575 | } | |
2576 | ||
2577 | #endif /* NS_USE_DESTRUCTORS */ | |
2578 | ||
2579 | ||
2580 | ||
2581 | static void recycle_rx_buf(ns_dev *card, struct sk_buff *skb) | |
2582 | { | |
2583 | if (skb->list == &card->sbpool.queue) | |
2584 | push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0); | |
2585 | else if (skb->list == &card->lbpool.queue) | |
2586 | push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), 0, 0); | |
2587 | else | |
2588 | { | |
2589 | printk("nicstar%d: What kind of rx buffer is this?\n", card->index); | |
2590 | dev_kfree_skb_any(skb); | |
2591 | } | |
2592 | } | |
2593 | ||
2594 | ||
2595 | ||
2596 | static void recycle_iovec_rx_bufs(ns_dev *card, struct iovec *iov, int count) | |
2597 | { | |
2598 | struct sk_buff *skb; | |
2599 | ||
2600 | for (; count > 0; count--) | |
2601 | { | |
2602 | skb = (struct sk_buff *) (iov++)->iov_base; | |
2603 | if (skb->list == &card->sbpool.queue) | |
2604 | push_rxbufs(card, BUF_SM, (u32) skb, (u32) virt_to_bus(skb->data), | |
2605 | 0, 0); | |
2606 | else if (skb->list == &card->lbpool.queue) | |
2607 | push_rxbufs(card, BUF_LG, (u32) skb, (u32) virt_to_bus(skb->data), | |
2608 | 0, 0); | |
2609 | else | |
2610 | { | |
2611 | printk("nicstar%d: What kind of rx buffer is this?\n", card->index); | |
2612 | dev_kfree_skb_any(skb); | |
2613 | } | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | ||
2618 | ||
2619 | static void recycle_iov_buf(ns_dev *card, struct sk_buff *iovb) | |
2620 | { | |
2621 | if (card->iovpool.count < card->iovnr.max) | |
2622 | { | |
2623 | skb_queue_tail(&card->iovpool.queue, iovb); | |
2624 | card->iovpool.count++; | |
2625 | } | |
2626 | else | |
2627 | dev_kfree_skb_any(iovb); | |
2628 | } | |
2629 | ||
2630 | ||
2631 | ||
2632 | static void dequeue_sm_buf(ns_dev *card, struct sk_buff *sb) | |
2633 | { | |
2634 | skb_unlink(sb); | |
2635 | #ifdef NS_USE_DESTRUCTORS | |
2636 | if (card->sbfqc < card->sbnr.min) | |
2637 | #else | |
2638 | if (card->sbfqc < card->sbnr.init) | |
2639 | { | |
2640 | struct sk_buff *new_sb; | |
2641 | if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) | |
2642 | { | |
2643 | skb_queue_tail(&card->sbpool.queue, new_sb); | |
2644 | skb_reserve(new_sb, NS_AAL0_HEADER); | |
2645 | push_rxbufs(card, BUF_SM, (u32) new_sb, | |
2646 | (u32) virt_to_bus(new_sb->data), 0, 0); | |
2647 | } | |
2648 | } | |
2649 | if (card->sbfqc < card->sbnr.init) | |
2650 | #endif /* NS_USE_DESTRUCTORS */ | |
2651 | { | |
2652 | struct sk_buff *new_sb; | |
2653 | if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) | |
2654 | { | |
2655 | skb_queue_tail(&card->sbpool.queue, new_sb); | |
2656 | skb_reserve(new_sb, NS_AAL0_HEADER); | |
2657 | push_rxbufs(card, BUF_SM, (u32) new_sb, | |
2658 | (u32) virt_to_bus(new_sb->data), 0, 0); | |
2659 | } | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | ||
2664 | ||
2665 | static void dequeue_lg_buf(ns_dev *card, struct sk_buff *lb) | |
2666 | { | |
2667 | skb_unlink(lb); | |
2668 | #ifdef NS_USE_DESTRUCTORS | |
2669 | if (card->lbfqc < card->lbnr.min) | |
2670 | #else | |
2671 | if (card->lbfqc < card->lbnr.init) | |
2672 | { | |
2673 | struct sk_buff *new_lb; | |
2674 | if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) | |
2675 | { | |
2676 | skb_queue_tail(&card->lbpool.queue, new_lb); | |
2677 | skb_reserve(new_lb, NS_SMBUFSIZE); | |
2678 | push_rxbufs(card, BUF_LG, (u32) new_lb, | |
2679 | (u32) virt_to_bus(new_lb->data), 0, 0); | |
2680 | } | |
2681 | } | |
2682 | if (card->lbfqc < card->lbnr.init) | |
2683 | #endif /* NS_USE_DESTRUCTORS */ | |
2684 | { | |
2685 | struct sk_buff *new_lb; | |
2686 | if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) | |
2687 | { | |
2688 | skb_queue_tail(&card->lbpool.queue, new_lb); | |
2689 | skb_reserve(new_lb, NS_SMBUFSIZE); | |
2690 | push_rxbufs(card, BUF_LG, (u32) new_lb, | |
2691 | (u32) virt_to_bus(new_lb->data), 0, 0); | |
2692 | } | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | ||
2697 | ||
2698 | static int ns_proc_read(struct atm_dev *dev, loff_t *pos, char *page) | |
2699 | { | |
2700 | u32 stat; | |
2701 | ns_dev *card; | |
2702 | int left; | |
2703 | ||
2704 | left = (int) *pos; | |
2705 | card = (ns_dev *) dev->dev_data; | |
2706 | stat = readl(card->membase + STAT); | |
2707 | if (!left--) | |
2708 | return sprintf(page, "Pool count min init max \n"); | |
2709 | if (!left--) | |
2710 | return sprintf(page, "Small %5d %5d %5d %5d \n", | |
2711 | ns_stat_sfbqc_get(stat), card->sbnr.min, card->sbnr.init, | |
2712 | card->sbnr.max); | |
2713 | if (!left--) | |
2714 | return sprintf(page, "Large %5d %5d %5d %5d \n", | |
2715 | ns_stat_lfbqc_get(stat), card->lbnr.min, card->lbnr.init, | |
2716 | card->lbnr.max); | |
2717 | if (!left--) | |
2718 | return sprintf(page, "Huge %5d %5d %5d %5d \n", card->hbpool.count, | |
2719 | card->hbnr.min, card->hbnr.init, card->hbnr.max); | |
2720 | if (!left--) | |
2721 | return sprintf(page, "Iovec %5d %5d %5d %5d \n", card->iovpool.count, | |
2722 | card->iovnr.min, card->iovnr.init, card->iovnr.max); | |
2723 | if (!left--) | |
2724 | { | |
2725 | int retval; | |
2726 | retval = sprintf(page, "Interrupt counter: %u \n", card->intcnt); | |
2727 | card->intcnt = 0; | |
2728 | return retval; | |
2729 | } | |
2730 | #if 0 | |
2731 | /* Dump 25.6 Mbps PHY registers */ | |
2732 | /* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it | |
2733 | here just in case it's needed for debugging. */ | |
2734 | if (card->max_pcr == ATM_25_PCR && !left--) | |
2735 | { | |
2736 | u32 phy_regs[4]; | |
2737 | u32 i; | |
2738 | ||
2739 | for (i = 0; i < 4; i++) | |
2740 | { | |
2741 | while (CMD_BUSY(card)); | |
2742 | writel(NS_CMD_READ_UTILITY | 0x00000200 | i, card->membase + CMD); | |
2743 | while (CMD_BUSY(card)); | |
2744 | phy_regs[i] = readl(card->membase + DR0) & 0x000000FF; | |
2745 | } | |
2746 | ||
2747 | return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n", | |
2748 | phy_regs[0], phy_regs[1], phy_regs[2], phy_regs[3]); | |
2749 | } | |
2750 | #endif /* 0 - Dump 25.6 Mbps PHY registers */ | |
2751 | #if 0 | |
2752 | /* Dump TST */ | |
2753 | if (left-- < NS_TST_NUM_ENTRIES) | |
2754 | { | |
2755 | if (card->tste2vc[left + 1] == NULL) | |
2756 | return sprintf(page, "%5d - VBR/UBR \n", left + 1); | |
2757 | else | |
2758 | return sprintf(page, "%5d - %d %d \n", left + 1, | |
2759 | card->tste2vc[left + 1]->tx_vcc->vpi, | |
2760 | card->tste2vc[left + 1]->tx_vcc->vci); | |
2761 | } | |
2762 | #endif /* 0 */ | |
2763 | return 0; | |
2764 | } | |
2765 | ||
2766 | ||
2767 | ||
2768 | static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user *arg) | |
2769 | { | |
2770 | ns_dev *card; | |
2771 | pool_levels pl; | |
2772 | int btype; | |
2773 | unsigned long flags; | |
2774 | ||
2775 | card = dev->dev_data; | |
2776 | switch (cmd) | |
2777 | { | |
2778 | case NS_GETPSTAT: | |
2779 | if (get_user(pl.buftype, &((pool_levels __user *) arg)->buftype)) | |
2780 | return -EFAULT; | |
2781 | switch (pl.buftype) | |
2782 | { | |
2783 | case NS_BUFTYPE_SMALL: | |
2784 | pl.count = ns_stat_sfbqc_get(readl(card->membase + STAT)); | |
2785 | pl.level.min = card->sbnr.min; | |
2786 | pl.level.init = card->sbnr.init; | |
2787 | pl.level.max = card->sbnr.max; | |
2788 | break; | |
2789 | ||
2790 | case NS_BUFTYPE_LARGE: | |
2791 | pl.count = ns_stat_lfbqc_get(readl(card->membase + STAT)); | |
2792 | pl.level.min = card->lbnr.min; | |
2793 | pl.level.init = card->lbnr.init; | |
2794 | pl.level.max = card->lbnr.max; | |
2795 | break; | |
2796 | ||
2797 | case NS_BUFTYPE_HUGE: | |
2798 | pl.count = card->hbpool.count; | |
2799 | pl.level.min = card->hbnr.min; | |
2800 | pl.level.init = card->hbnr.init; | |
2801 | pl.level.max = card->hbnr.max; | |
2802 | break; | |
2803 | ||
2804 | case NS_BUFTYPE_IOVEC: | |
2805 | pl.count = card->iovpool.count; | |
2806 | pl.level.min = card->iovnr.min; | |
2807 | pl.level.init = card->iovnr.init; | |
2808 | pl.level.max = card->iovnr.max; | |
2809 | break; | |
2810 | ||
2811 | default: | |
2812 | return -ENOIOCTLCMD; | |
2813 | ||
2814 | } | |
2815 | if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl))) | |
2816 | return (sizeof(pl)); | |
2817 | else | |
2818 | return -EFAULT; | |
2819 | ||
2820 | case NS_SETBUFLEV: | |
2821 | if (!capable(CAP_NET_ADMIN)) | |
2822 | return -EPERM; | |
2823 | if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl))) | |
2824 | return -EFAULT; | |
2825 | if (pl.level.min >= pl.level.init || pl.level.init >= pl.level.max) | |
2826 | return -EINVAL; | |
2827 | if (pl.level.min == 0) | |
2828 | return -EINVAL; | |
2829 | switch (pl.buftype) | |
2830 | { | |
2831 | case NS_BUFTYPE_SMALL: | |
2832 | if (pl.level.max > TOP_SB) | |
2833 | return -EINVAL; | |
2834 | card->sbnr.min = pl.level.min; | |
2835 | card->sbnr.init = pl.level.init; | |
2836 | card->sbnr.max = pl.level.max; | |
2837 | break; | |
2838 | ||
2839 | case NS_BUFTYPE_LARGE: | |
2840 | if (pl.level.max > TOP_LB) | |
2841 | return -EINVAL; | |
2842 | card->lbnr.min = pl.level.min; | |
2843 | card->lbnr.init = pl.level.init; | |
2844 | card->lbnr.max = pl.level.max; | |
2845 | break; | |
2846 | ||
2847 | case NS_BUFTYPE_HUGE: | |
2848 | if (pl.level.max > TOP_HB) | |
2849 | return -EINVAL; | |
2850 | card->hbnr.min = pl.level.min; | |
2851 | card->hbnr.init = pl.level.init; | |
2852 | card->hbnr.max = pl.level.max; | |
2853 | break; | |
2854 | ||
2855 | case NS_BUFTYPE_IOVEC: | |
2856 | if (pl.level.max > TOP_IOVB) | |
2857 | return -EINVAL; | |
2858 | card->iovnr.min = pl.level.min; | |
2859 | card->iovnr.init = pl.level.init; | |
2860 | card->iovnr.max = pl.level.max; | |
2861 | break; | |
2862 | ||
2863 | default: | |
2864 | return -EINVAL; | |
2865 | ||
2866 | } | |
2867 | return 0; | |
2868 | ||
2869 | case NS_ADJBUFLEV: | |
2870 | if (!capable(CAP_NET_ADMIN)) | |
2871 | return -EPERM; | |
2872 | btype = (int) arg; /* an int is the same size as a pointer */ | |
2873 | switch (btype) | |
2874 | { | |
2875 | case NS_BUFTYPE_SMALL: | |
2876 | while (card->sbfqc < card->sbnr.init) | |
2877 | { | |
2878 | struct sk_buff *sb; | |
2879 | ||
2880 | sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL); | |
2881 | if (sb == NULL) | |
2882 | return -ENOMEM; | |
2883 | skb_queue_tail(&card->sbpool.queue, sb); | |
2884 | skb_reserve(sb, NS_AAL0_HEADER); | |
2885 | push_rxbufs(card, BUF_SM, (u32) sb, (u32) virt_to_bus(sb->data), 0, 0); | |
2886 | } | |
2887 | break; | |
2888 | ||
2889 | case NS_BUFTYPE_LARGE: | |
2890 | while (card->lbfqc < card->lbnr.init) | |
2891 | { | |
2892 | struct sk_buff *lb; | |
2893 | ||
2894 | lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL); | |
2895 | if (lb == NULL) | |
2896 | return -ENOMEM; | |
2897 | skb_queue_tail(&card->lbpool.queue, lb); | |
2898 | skb_reserve(lb, NS_SMBUFSIZE); | |
2899 | push_rxbufs(card, BUF_LG, (u32) lb, (u32) virt_to_bus(lb->data), 0, 0); | |
2900 | } | |
2901 | break; | |
2902 | ||
2903 | case NS_BUFTYPE_HUGE: | |
2904 | while (card->hbpool.count > card->hbnr.init) | |
2905 | { | |
2906 | struct sk_buff *hb; | |
2907 | ||
2908 | ns_grab_int_lock(card, flags); | |
2909 | hb = skb_dequeue(&card->hbpool.queue); | |
2910 | card->hbpool.count--; | |
2911 | spin_unlock_irqrestore(&card->int_lock, flags); | |
2912 | if (hb == NULL) | |
2913 | printk("nicstar%d: huge buffer count inconsistent.\n", | |
2914 | card->index); | |
2915 | else | |
2916 | dev_kfree_skb_any(hb); | |
2917 | ||
2918 | } | |
2919 | while (card->hbpool.count < card->hbnr.init) | |
2920 | { | |
2921 | struct sk_buff *hb; | |
2922 | ||
2923 | hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL); | |
2924 | if (hb == NULL) | |
2925 | return -ENOMEM; | |
2926 | ns_grab_int_lock(card, flags); | |
2927 | skb_queue_tail(&card->hbpool.queue, hb); | |
2928 | card->hbpool.count++; | |
2929 | spin_unlock_irqrestore(&card->int_lock, flags); | |
2930 | } | |
2931 | break; | |
2932 | ||
2933 | case NS_BUFTYPE_IOVEC: | |
2934 | while (card->iovpool.count > card->iovnr.init) | |
2935 | { | |
2936 | struct sk_buff *iovb; | |
2937 | ||
2938 | ns_grab_int_lock(card, flags); | |
2939 | iovb = skb_dequeue(&card->iovpool.queue); | |
2940 | card->iovpool.count--; | |
2941 | spin_unlock_irqrestore(&card->int_lock, flags); | |
2942 | if (iovb == NULL) | |
2943 | printk("nicstar%d: iovec buffer count inconsistent.\n", | |
2944 | card->index); | |
2945 | else | |
2946 | dev_kfree_skb_any(iovb); | |
2947 | ||
2948 | } | |
2949 | while (card->iovpool.count < card->iovnr.init) | |
2950 | { | |
2951 | struct sk_buff *iovb; | |
2952 | ||
2953 | iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL); | |
2954 | if (iovb == NULL) | |
2955 | return -ENOMEM; | |
2956 | ns_grab_int_lock(card, flags); | |
2957 | skb_queue_tail(&card->iovpool.queue, iovb); | |
2958 | card->iovpool.count++; | |
2959 | spin_unlock_irqrestore(&card->int_lock, flags); | |
2960 | } | |
2961 | break; | |
2962 | ||
2963 | default: | |
2964 | return -EINVAL; | |
2965 | ||
2966 | } | |
2967 | return 0; | |
2968 | ||
2969 | default: | |
2970 | if (dev->phy && dev->phy->ioctl) { | |
2971 | return dev->phy->ioctl(dev, cmd, arg); | |
2972 | } | |
2973 | else { | |
2974 | printk("nicstar%d: %s == NULL \n", card->index, | |
2975 | dev->phy ? "dev->phy->ioctl" : "dev->phy"); | |
2976 | return -ENOIOCTLCMD; | |
2977 | } | |
2978 | } | |
2979 | } | |
2980 | ||
2981 | ||
2982 | ||
2983 | static void which_list(ns_dev *card, struct sk_buff *skb) | |
2984 | { | |
2985 | printk("It's a %s buffer.\n", skb->list == &card->sbpool.queue ? | |
2986 | "small" : skb->list == &card->lbpool.queue ? "large" : | |
2987 | skb->list == &card->hbpool.queue ? "huge" : | |
2988 | skb->list == &card->iovpool.queue ? "iovec" : "unknown"); | |
2989 | } | |
2990 | ||
2991 | ||
2992 | ||
2993 | static void ns_poll(unsigned long arg) | |
2994 | { | |
2995 | int i; | |
2996 | ns_dev *card; | |
2997 | unsigned long flags; | |
2998 | u32 stat_r, stat_w; | |
2999 | ||
3000 | PRINTK("nicstar: Entering ns_poll().\n"); | |
3001 | for (i = 0; i < num_cards; i++) | |
3002 | { | |
3003 | card = cards[i]; | |
3004 | if (spin_is_locked(&card->int_lock)) { | |
3005 | /* Probably it isn't worth spinning */ | |
3006 | continue; | |
3007 | } | |
3008 | ns_grab_int_lock(card, flags); | |
3009 | ||
3010 | stat_w = 0; | |
3011 | stat_r = readl(card->membase + STAT); | |
3012 | if (stat_r & NS_STAT_TSIF) | |
3013 | stat_w |= NS_STAT_TSIF; | |
3014 | if (stat_r & NS_STAT_EOPDU) | |
3015 | stat_w |= NS_STAT_EOPDU; | |
3016 | ||
3017 | process_tsq(card); | |
3018 | process_rsq(card); | |
3019 | ||
3020 | writel(stat_w, card->membase + STAT); | |
3021 | spin_unlock_irqrestore(&card->int_lock, flags); | |
3022 | } | |
3023 | mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD); | |
3024 | PRINTK("nicstar: Leaving ns_poll().\n"); | |
3025 | } | |
3026 | ||
3027 | ||
3028 | ||
3029 | static int ns_parse_mac(char *mac, unsigned char *esi) | |
3030 | { | |
3031 | int i, j; | |
3032 | short byte1, byte0; | |
3033 | ||
3034 | if (mac == NULL || esi == NULL) | |
3035 | return -1; | |
3036 | j = 0; | |
3037 | for (i = 0; i < 6; i++) | |
3038 | { | |
3039 | if ((byte1 = ns_h2i(mac[j++])) < 0) | |
3040 | return -1; | |
3041 | if ((byte0 = ns_h2i(mac[j++])) < 0) | |
3042 | return -1; | |
3043 | esi[i] = (unsigned char) (byte1 * 16 + byte0); | |
3044 | if (i < 5) | |
3045 | { | |
3046 | if (mac[j++] != ':') | |
3047 | return -1; | |
3048 | } | |
3049 | } | |
3050 | return 0; | |
3051 | } | |
3052 | ||
3053 | ||
3054 | ||
3055 | static short ns_h2i(char c) | |
3056 | { | |
3057 | if (c >= '0' && c <= '9') | |
3058 | return (short) (c - '0'); | |
3059 | if (c >= 'A' && c <= 'F') | |
3060 | return (short) (c - 'A' + 10); | |
3061 | if (c >= 'a' && c <= 'f') | |
3062 | return (short) (c - 'a' + 10); | |
3063 | return -1; | |
3064 | } | |
3065 | ||
3066 | ||
3067 | ||
3068 | static void ns_phy_put(struct atm_dev *dev, unsigned char value, | |
3069 | unsigned long addr) | |
3070 | { | |
3071 | ns_dev *card; | |
3072 | unsigned long flags; | |
3073 | ||
3074 | card = dev->dev_data; | |
3075 | ns_grab_res_lock(card, flags); | |
3076 | while(CMD_BUSY(card)); | |
3077 | writel((unsigned long) value, card->membase + DR0); | |
3078 | writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF), | |
3079 | card->membase + CMD); | |
3080 | spin_unlock_irqrestore(&card->res_lock, flags); | |
3081 | } | |
3082 | ||
3083 | ||
3084 | ||
3085 | static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr) | |
3086 | { | |
3087 | ns_dev *card; | |
3088 | unsigned long flags; | |
3089 | unsigned long data; | |
3090 | ||
3091 | card = dev->dev_data; | |
3092 | ns_grab_res_lock(card, flags); | |
3093 | while(CMD_BUSY(card)); | |
3094 | writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF), | |
3095 | card->membase + CMD); | |
3096 | while(CMD_BUSY(card)); | |
3097 | data = readl(card->membase + DR0) & 0x000000FF; | |
3098 | spin_unlock_irqrestore(&card->res_lock, flags); | |
3099 | return (unsigned char) data; | |
3100 | } | |
3101 | ||
3102 | ||
3103 | ||
3104 | module_init(nicstar_init); | |
3105 | module_exit(nicstar_cleanup); |