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kernel: rename is_single_threaded(task) to current_is_single_threaded(void)
[linux-2.6/mini2440.git] / drivers / atm / solos-pci.c
blob9359613addc5a7290e8190d0417e6cda7d8cebe9
1 /*
2 * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
3 * Traverse Technologies -- http://www.traverse.com.au/
4 * Xrio Limited -- http://www.xrio.com/
5 *
6 *
7 * Copyright © 2008 Traverse Technologies
8 * Copyright © 2008 Intel Corporation
9 *
10 * Authors: Nathan Williams <nathan@traverse.com.au>
11 * David Woodhouse <dwmw2@infradead.org>
12 * Treker Chen <treker@xrio.com>
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * version 2, as published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 */
23
24 #define DEBUG
25 #define VERBOSE_DEBUG
26
27 #include <linux/interrupt.h>
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/errno.h>
31 #include <linux/ioport.h>
32 #include <linux/types.h>
33 #include <linux/pci.h>
34 #include <linux/atm.h>
35 #include <linux/atmdev.h>
36 #include <linux/skbuff.h>
37 #include <linux/sysfs.h>
38 #include <linux/device.h>
39 #include <linux/kobject.h>
40 #include <linux/firmware.h>
41 #include <linux/ctype.h>
42 #include <linux/swab.h>
43
44 #define VERSION "0.07"
45 #define PTAG "solos-pci"
46
47 #define CONFIG_RAM_SIZE 128
48 #define FLAGS_ADDR 0x7C
49 #define IRQ_EN_ADDR 0x78
50 #define FPGA_VER 0x74
51 #define IRQ_CLEAR 0x70
52 #define WRITE_FLASH 0x6C
53 #define PORTS 0x68
54 #define FLASH_BLOCK 0x64
55 #define FLASH_BUSY 0x60
56 #define FPGA_MODE 0x5C
57 #define FLASH_MODE 0x58
58 #define TX_DMA_ADDR(port) (0x40 + (4 * (port)))
59 #define RX_DMA_ADDR(port) (0x30 + (4 * (port)))
60
61 #define DATA_RAM_SIZE 32768
62 #define BUF_SIZE 4096
63 #define FPGA_PAGE 528 /* FPGA flash page size*/
64 #define SOLOS_PAGE 512 /* Solos flash page size*/
65 #define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
66 #define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
67
68 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
69 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
70
71 #define RX_DMA_SIZE 2048
72
73 static int reset = 0;
74 static int atmdebug = 0;
75 static int firmware_upgrade = 0;
76 static int fpga_upgrade = 0;
77
78 struct pkt_hdr {
79 __le16 size;
80 __le16 vpi;
81 __le16 vci;
82 __le16 type;
83 };
84
85 struct solos_skb_cb {
86 struct atm_vcc *vcc;
87 uint32_t dma_addr;
88 };
89
90
91 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
92
93 #define PKT_DATA 0
94 #define PKT_COMMAND 1
95 #define PKT_POPEN 3
96 #define PKT_PCLOSE 4
97 #define PKT_STATUS 5
98
99 struct solos_card {
100 void __iomem *config_regs;
101 void __iomem *buffers;
102 int nr_ports;
103 int tx_mask;
104 struct pci_dev *dev;
105 struct atm_dev *atmdev[4];
106 struct tasklet_struct tlet;
107 spinlock_t tx_lock;
108 spinlock_t tx_queue_lock;
109 spinlock_t cli_queue_lock;
110 spinlock_t param_queue_lock;
111 struct list_head param_queue;
112 struct sk_buff_head tx_queue[4];
113 struct sk_buff_head cli_queue[4];
114 struct sk_buff *tx_skb[4];
115 struct sk_buff *rx_skb[4];
116 wait_queue_head_t param_wq;
117 wait_queue_head_t fw_wq;
118 int using_dma;
119 };
120
121
122 struct solos_param {
123 struct list_head list;
124 pid_t pid;
125 int port;
126 struct sk_buff *response;
127 };
128
129 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
130
131 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
132 MODULE_DESCRIPTION("Solos PCI driver");
133 MODULE_VERSION(VERSION);
134 MODULE_LICENSE("GPL");
135 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
136 MODULE_PARM_DESC(atmdebug, "Print ATM data");
137 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
138 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
139 module_param(reset, int, 0444);
140 module_param(atmdebug, int, 0644);
141 module_param(firmware_upgrade, int, 0444);
142 module_param(fpga_upgrade, int, 0444);
143
144 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
145 struct atm_vcc *vcc);
146 static uint32_t fpga_tx(struct solos_card *);
147 static irqreturn_t solos_irq(int irq, void *dev_id);
148 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
149 static int list_vccs(int vci);
150 static void release_vccs(struct atm_dev *dev);
151 static int atm_init(struct solos_card *);
152 static void atm_remove(struct solos_card *);
153 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
154 static void solos_bh(unsigned long);
155 static int print_buffer(struct sk_buff *buf);
156
157 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
158 {
159 if (vcc->pop)
160 vcc->pop(vcc, skb);
161 else
162 dev_kfree_skb_any(skb);
163 }
164
165 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
166 char *buf)
167 {
168 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
169 struct solos_card *card = atmdev->dev_data;
170 struct solos_param prm;
171 struct sk_buff *skb;
172 struct pkt_hdr *header;
173 int buflen;
174
175 buflen = strlen(attr->attr.name) + 10;
176
177 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
178 if (!skb) {
179 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
180 return -ENOMEM;
181 }
182
183 header = (void *)skb_put(skb, sizeof(*header));
184
185 buflen = snprintf((void *)&header[1], buflen - 1,
186 "L%05d\n%s\n", current->pid, attr->attr.name);
187 skb_put(skb, buflen);
188
189 header->size = cpu_to_le16(buflen);
190 header->vpi = cpu_to_le16(0);
191 header->vci = cpu_to_le16(0);
192 header->type = cpu_to_le16(PKT_COMMAND);
193
194 prm.pid = current->pid;
195 prm.response = NULL;
196 prm.port = SOLOS_CHAN(atmdev);
197
198 spin_lock_irq(&card->param_queue_lock);
199 list_add(&prm.list, &card->param_queue);
200 spin_unlock_irq(&card->param_queue_lock);
201
202 fpga_queue(card, prm.port, skb, NULL);
203
204 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
205
206 spin_lock_irq(&card->param_queue_lock);
207 list_del(&prm.list);
208 spin_unlock_irq(&card->param_queue_lock);
209
210 if (!prm.response)
211 return -EIO;
212
213 buflen = prm.response->len;
214 memcpy(buf, prm.response->data, buflen);
215 kfree_skb(prm.response);
216
217 return buflen;
218 }
219
220 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
221 const char *buf, size_t count)
222 {
223 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
224 struct solos_card *card = atmdev->dev_data;
225 struct solos_param prm;
226 struct sk_buff *skb;
227 struct pkt_hdr *header;
228 int buflen;
229 ssize_t ret;
230
231 buflen = strlen(attr->attr.name) + 11 + count;
232
233 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
234 if (!skb) {
235 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
236 return -ENOMEM;
237 }
238
239 header = (void *)skb_put(skb, sizeof(*header));
240
241 buflen = snprintf((void *)&header[1], buflen - 1,
242 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
243
244 skb_put(skb, buflen);
245 header->size = cpu_to_le16(buflen);
246 header->vpi = cpu_to_le16(0);
247 header->vci = cpu_to_le16(0);
248 header->type = cpu_to_le16(PKT_COMMAND);
249
250 prm.pid = current->pid;
251 prm.response = NULL;
252 prm.port = SOLOS_CHAN(atmdev);
253
254 spin_lock_irq(&card->param_queue_lock);
255 list_add(&prm.list, &card->param_queue);
256 spin_unlock_irq(&card->param_queue_lock);
257
258 fpga_queue(card, prm.port, skb, NULL);
259
260 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
261
262 spin_lock_irq(&card->param_queue_lock);
263 list_del(&prm.list);
264 spin_unlock_irq(&card->param_queue_lock);
265
266 skb = prm.response;
267
268 if (!skb)
269 return -EIO;
270
271 buflen = skb->len;
272
273 /* Sometimes it has a newline, sometimes it doesn't. */
274 if (skb->data[buflen - 1] == '\n')
275 buflen--;
276
277 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
278 ret = count;
279 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
280 ret = -EIO;
281 else {
282 /* We know we have enough space allocated for this; we allocated
283 it ourselves */
284 skb->data[buflen] = 0;
285
286 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
287 skb->data);
288 ret = -EIO;
289 }
290 kfree_skb(skb);
291
292 return ret;
293 }
294
295 static char *next_string(struct sk_buff *skb)
296 {
297 int i = 0;
298 char *this = skb->data;
299
300 for (i = 0; i < skb->len; i++) {
301 if (this[i] == '\n') {
302 this[i] = 0;
303 skb_pull(skb, i + 1);
304 return this;
305 }
306 if (!isprint(this[i]))
307 return NULL;
308 }
309 return NULL;
310 }
311
312 /*
313 * Status packet has fields separated by \n, starting with a version number
314 * for the information therein. Fields are....
315 *
316 * packet version
317 * RxBitRate (version >= 1)
318 * TxBitRate (version >= 1)
319 * State (version >= 1)
320 * LocalSNRMargin (version >= 1)
321 * LocalLineAttn (version >= 1)
322 */
323 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
324 {
325 char *str, *end, *state_str, *snr, *attn;
326 int ver, rate_up, rate_down;
327
328 if (!card->atmdev[port])
329 return -ENODEV;
330
331 str = next_string(skb);
332 if (!str)
333 return -EIO;
334
335 ver = simple_strtol(str, NULL, 10);
336 if (ver < 1) {
337 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
338 ver);
339 return -EIO;
340 }
341
342 str = next_string(skb);
343 if (!str)
344 return -EIO;
345 if (!strcmp(str, "ERROR")) {
346 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
347 port);
348 return 0;
349 }
350
351 rate_down = simple_strtol(str, &end, 10);
352 if (*end)
353 return -EIO;
354
355 str = next_string(skb);
356 if (!str)
357 return -EIO;
358 rate_up = simple_strtol(str, &end, 10);
359 if (*end)
360 return -EIO;
361
362 state_str = next_string(skb);
363 if (!state_str)
364 return -EIO;
365
366 /* Anything but 'Showtime' is down */
367 if (strcmp(state_str, "Showtime")) {
368 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
369 release_vccs(card->atmdev[port]);
370 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
371 return 0;
372 }
373
374 snr = next_string(skb);
375 if (!str)
376 return -EIO;
377 attn = next_string(skb);
378 if (!attn)
379 return -EIO;
380
381 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
382 port, state_str, rate_down/1000, rate_up/1000,
383 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
384
385 card->atmdev[port]->link_rate = rate_down / 424;
386 card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
387
388 return 0;
389 }
390
391 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
392 {
393 struct solos_param *prm;
394 unsigned long flags;
395 int cmdpid;
396 int found = 0;
397
398 if (skb->len < 7)
399 return 0;
400
401 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
402 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
403 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
404 skb->data[6] != '\n')
405 return 0;
406
407 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
408
409 spin_lock_irqsave(&card->param_queue_lock, flags);
410 list_for_each_entry(prm, &card->param_queue, list) {
411 if (prm->port == port && prm->pid == cmdpid) {
412 prm->response = skb;
413 skb_pull(skb, 7);
414 wake_up(&card->param_wq);
415 found = 1;
416 break;
417 }
418 }
419 spin_unlock_irqrestore(&card->param_queue_lock, flags);
420 return found;
421 }
422
423 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
424 char *buf)
425 {
426 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
427 struct solos_card *card = atmdev->dev_data;
428 struct sk_buff *skb;
429
430 spin_lock(&card->cli_queue_lock);
431 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
432 spin_unlock(&card->cli_queue_lock);
433 if(skb == NULL)
434 return sprintf(buf, "No data.\n");
435
436 memcpy(buf, skb->data, skb->len);
437 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
438
439 kfree_skb(skb);
440 return skb->len;
441 }
442
443 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
444 {
445 struct sk_buff *skb;
446 struct pkt_hdr *header;
447
448 if (size > (BUF_SIZE - sizeof(*header))) {
449 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
450 return 0;
451 }
452 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
453 if (!skb) {
454 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
455 return 0;
456 }
457
458 header = (void *)skb_put(skb, sizeof(*header));
459
460 header->size = cpu_to_le16(size);
461 header->vpi = cpu_to_le16(0);
462 header->vci = cpu_to_le16(0);
463 header->type = cpu_to_le16(PKT_COMMAND);
464
465 memcpy(skb_put(skb, size), buf, size);
466
467 fpga_queue(card, dev, skb, NULL);
468
469 return 0;
470 }
471
472 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
473 const char *buf, size_t count)
474 {
475 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
476 struct solos_card *card = atmdev->dev_data;
477 int err;
478
479 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
480
481 return err?:count;
482 }
483
484 static DEVICE_ATTR(console, 0644, console_show, console_store);
485
486
487 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
488 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
489
490 #include "solos-attrlist.c"
491
492 #undef SOLOS_ATTR_RO
493 #undef SOLOS_ATTR_RW
494
495 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
496 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
497
498 static struct attribute *solos_attrs[] = {
499 #include "solos-attrlist.c"
500 NULL
501 };
502
503 static struct attribute_group solos_attr_group = {
504 .attrs = solos_attrs,
505 .name = "parameters",
506 };
507
508 static int flash_upgrade(struct solos_card *card, int chip)
509 {
510 const struct firmware *fw;
511 const char *fw_name;
512 uint32_t data32 = 0;
513 int blocksize = 0;
514 int numblocks = 0;
515 int offset;
516
517 if (chip == 0) {
518 fw_name = "solos-FPGA.bin";
519 blocksize = FPGA_BLOCK;
520 } else {
521 fw_name = "solos-Firmware.bin";
522 blocksize = SOLOS_BLOCK;
523 }
524
525 if (request_firmware(&fw, fw_name, &card->dev->dev))
526 return -ENOENT;
527
528 dev_info(&card->dev->dev, "Flash upgrade starting\n");
529
530 numblocks = fw->size / blocksize;
531 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
532 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
533
534 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
535 iowrite32(1, card->config_regs + FPGA_MODE);
536 data32 = ioread32(card->config_regs + FPGA_MODE);
537
538 /* Set mode to Chip Erase */
539 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
540 chip?"Solos":"FPGA");
541 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
542
543
544 iowrite32(1, card->config_regs + WRITE_FLASH);
545 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
546
547 for (offset = 0; offset < fw->size; offset += blocksize) {
548 int i;
549
550 /* Clear write flag */
551 iowrite32(0, card->config_regs + WRITE_FLASH);
552
553 /* Set mode to Block Write */
554 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
555 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
556
557 /* Copy block to buffer, swapping each 16 bits */
558 for(i = 0; i < blocksize; i += 4) {
559 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
560 iowrite32(word, RX_BUF(card, 3) + i);
561 }
562
563 /* Specify block number and then trigger flash write */
564 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
565 iowrite32(1, card->config_regs + WRITE_FLASH);
566 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
567 }
568
569 release_firmware(fw);
570 iowrite32(0, card->config_regs + WRITE_FLASH);
571 iowrite32(0, card->config_regs + FPGA_MODE);
572 iowrite32(0, card->config_regs + FLASH_MODE);
573 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
574 return 0;
575 }
576
577 static irqreturn_t solos_irq(int irq, void *dev_id)
578 {
579 struct solos_card *card = dev_id;
580 int handled = 1;
581
582 iowrite32(0, card->config_regs + IRQ_CLEAR);
583
584 /* If we're up and running, just kick the tasklet to process TX/RX */
585 if (card->atmdev[0])
586 tasklet_schedule(&card->tlet);
587 else
588 wake_up(&card->fw_wq);
589
590 return IRQ_RETVAL(handled);
591 }
592
593 void solos_bh(unsigned long card_arg)
594 {
595 struct solos_card *card = (void *)card_arg;
596 uint32_t card_flags;
597 uint32_t rx_done = 0;
598 int port;
599
600 /*
601 * Since fpga_tx() is going to need to read the flags under its lock,
602 * it can return them to us so that we don't have to hit PCI MMIO
603 * again for the same information
604 */
605 card_flags = fpga_tx(card);
606
607 for (port = 0; port < card->nr_ports; port++) {
608 if (card_flags & (0x10 << port)) {
609 struct pkt_hdr _hdr, *header;
610 struct sk_buff *skb;
611 struct atm_vcc *vcc;
612 int size;
613
614 if (card->using_dma) {
615 skb = card->rx_skb[port];
616 card->rx_skb[port] = NULL;
617
618 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
619 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
620
621 header = (void *)skb->data;
622 size = le16_to_cpu(header->size);
623 skb_put(skb, size + sizeof(*header));
624 skb_pull(skb, sizeof(*header));
625 } else {
626 header = &_hdr;
627
628 rx_done |= 0x10 << port;
629
630 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
631
632 size = le16_to_cpu(header->size);
633
634 skb = alloc_skb(size + 1, GFP_ATOMIC);
635 if (!skb) {
636 if (net_ratelimit())
637 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
638 continue;
639 }
640
641 memcpy_fromio(skb_put(skb, size),
642 RX_BUF(card, port) + sizeof(*header),
643 size);
644 }
645 if (atmdebug) {
646 dev_info(&card->dev->dev, "Received: device %d\n", port);
647 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
648 size, le16_to_cpu(header->vpi),
649 le16_to_cpu(header->vci));
650 print_buffer(skb);
651 }
652
653 switch (le16_to_cpu(header->type)) {
654 case PKT_DATA:
655 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
656 le16_to_cpu(header->vci));
657 if (!vcc) {
658 if (net_ratelimit())
659 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
660 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
661 port);
662 continue;
663 }
664 atm_charge(vcc, skb->truesize);
665 vcc->push(vcc, skb);
666 atomic_inc(&vcc->stats->rx);
667 break;
668
669 case PKT_STATUS:
670 if (process_status(card, port, skb) &&
671 net_ratelimit()) {
672 dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
673 print_buffer(skb);
674 }
675 dev_kfree_skb_any(skb);
676 break;
677
678 case PKT_COMMAND:
679 default: /* FIXME: Not really, surely? */
680 if (process_command(card, port, skb))
681 break;
682 spin_lock(&card->cli_queue_lock);
683 if (skb_queue_len(&card->cli_queue[port]) > 10) {
684 if (net_ratelimit())
685 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
686 port);
687 dev_kfree_skb_any(skb);
688 } else
689 skb_queue_tail(&card->cli_queue[port], skb);
690 spin_unlock(&card->cli_queue_lock);
691 break;
692 }
693 }
694 /* Allocate RX skbs for any ports which need them */
695 if (card->using_dma && card->atmdev[port] &&
696 !card->rx_skb[port]) {
697 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
698 if (skb) {
699 SKB_CB(skb)->dma_addr =
700 pci_map_single(card->dev, skb->data,
701 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
702 iowrite32(SKB_CB(skb)->dma_addr,
703 card->config_regs + RX_DMA_ADDR(port));
704 card->rx_skb[port] = skb;
705 } else {
706 if (net_ratelimit())
707 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
708
709 /* We'll have to try again later */
710 tasklet_schedule(&card->tlet);
711 }
712 }
713 }
714 if (rx_done)
715 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
716
717 return;
718 }
719
720 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
721 {
722 struct hlist_head *head;
723 struct atm_vcc *vcc = NULL;
724 struct hlist_node *node;
725 struct sock *s;
726
727 read_lock(&vcc_sklist_lock);
728 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
729 sk_for_each(s, node, head) {
730 vcc = atm_sk(s);
731 if (vcc->dev == dev && vcc->vci == vci &&
732 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
733 goto out;
734 }
735 vcc = NULL;
736 out:
737 read_unlock(&vcc_sklist_lock);
738 return vcc;
739 }
740
741 static int list_vccs(int vci)
742 {
743 struct hlist_head *head;
744 struct atm_vcc *vcc;
745 struct hlist_node *node;
746 struct sock *s;
747 int num_found = 0;
748 int i;
749
750 read_lock(&vcc_sklist_lock);
751 if (vci != 0){
752 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
753 sk_for_each(s, node, head) {
754 num_found ++;
755 vcc = atm_sk(s);
756 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
757 vcc->dev->number,
758 vcc->vpi,
759 vcc->vci);
760 }
761 } else {
762 for(i = 0; i < VCC_HTABLE_SIZE; i++){
763 head = &vcc_hash[i];
764 sk_for_each(s, node, head) {
765 num_found ++;
766 vcc = atm_sk(s);
767 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
768 vcc->dev->number,
769 vcc->vpi,
770 vcc->vci);
771 }
772 }
773 }
774 read_unlock(&vcc_sklist_lock);
775 return num_found;
776 }
777
778 static void release_vccs(struct atm_dev *dev)
779 {
780 int i;
781
782 write_lock_irq(&vcc_sklist_lock);
783 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
784 struct hlist_head *head = &vcc_hash[i];
785 struct hlist_node *node, *tmp;
786 struct sock *s;
787 struct atm_vcc *vcc;
788
789 sk_for_each_safe(s, node, tmp, head) {
790 vcc = atm_sk(s);
791 if (vcc->dev == dev) {
792 vcc_release_async(vcc, -EPIPE);
793 sk_del_node_init(s);
794 }
795 }
796 }
797 write_unlock_irq(&vcc_sklist_lock);
798 }
799
800
801 static int popen(struct atm_vcc *vcc)
802 {
803 struct solos_card *card = vcc->dev->dev_data;
804 struct sk_buff *skb;
805 struct pkt_hdr *header;
806
807 if (vcc->qos.aal != ATM_AAL5) {
808 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
809 vcc->qos.aal);
810 return -EINVAL;
811 }
812
813 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
814 if (!skb && net_ratelimit()) {
815 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
816 return -ENOMEM;
817 }
818 header = (void *)skb_put(skb, sizeof(*header));
819
820 header->size = cpu_to_le16(0);
821 header->vpi = cpu_to_le16(vcc->vpi);
822 header->vci = cpu_to_le16(vcc->vci);
823 header->type = cpu_to_le16(PKT_POPEN);
824
825 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
826
827 set_bit(ATM_VF_ADDR, &vcc->flags);
828 set_bit(ATM_VF_READY, &vcc->flags);
829 list_vccs(0);
830
831
832 return 0;
833 }
834
835 static void pclose(struct atm_vcc *vcc)
836 {
837 struct solos_card *card = vcc->dev->dev_data;
838 struct sk_buff *skb;
839 struct pkt_hdr *header;
840
841 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
842 if (!skb) {
843 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
844 return;
845 }
846 header = (void *)skb_put(skb, sizeof(*header));
847
848 header->size = cpu_to_le16(0);
849 header->vpi = cpu_to_le16(vcc->vpi);
850 header->vci = cpu_to_le16(vcc->vci);
851 header->type = cpu_to_le16(PKT_PCLOSE);
852
853 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
854
855 clear_bit(ATM_VF_ADDR, &vcc->flags);
856 clear_bit(ATM_VF_READY, &vcc->flags);
857
858 return;
859 }
860
861 static int print_buffer(struct sk_buff *buf)
862 {
863 int len,i;
864 char msg[500];
865 char item[10];
866
867 len = buf->len;
868 for (i = 0; i < len; i++){
869 if(i % 8 == 0)
870 sprintf(msg, "%02X: ", i);
871
872 sprintf(item,"%02X ",*(buf->data + i));
873 strcat(msg, item);
874 if(i % 8 == 7) {
875 sprintf(item, "\n");
876 strcat(msg, item);
877 printk(KERN_DEBUG "%s", msg);
878 }
879 }
880 if (i % 8 != 0) {
881 sprintf(item, "\n");
882 strcat(msg, item);
883 printk(KERN_DEBUG "%s", msg);
884 }
885 printk(KERN_DEBUG "\n");
886
887 return 0;
888 }
889
890 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
891 struct atm_vcc *vcc)
892 {
893 int old_len;
894 unsigned long flags;
895
896 SKB_CB(skb)->vcc = vcc;
897
898 spin_lock_irqsave(&card->tx_queue_lock, flags);
899 old_len = skb_queue_len(&card->tx_queue[port]);
900 skb_queue_tail(&card->tx_queue[port], skb);
901 if (!old_len)
902 card->tx_mask |= (1 << port);
903 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
904
905 /* Theoretically we could just schedule the tasklet here, but
906 that introduces latency we don't want -- it's noticeable */
907 if (!old_len)
908 fpga_tx(card);
909 }
910
911 static uint32_t fpga_tx(struct solos_card *card)
912 {
913 uint32_t tx_pending, card_flags;
914 uint32_t tx_started = 0;
915 struct sk_buff *skb;
916 struct atm_vcc *vcc;
917 unsigned char port;
918 unsigned long flags;
919
920 spin_lock_irqsave(&card->tx_lock, flags);
921
922 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
923 /*
924 * The queue lock is required for _writing_ to tx_mask, but we're
925 * OK to read it here without locking. The only potential update
926 * that we could race with is in fpga_queue() where it sets a bit
927 * for a new port... but it's going to call this function again if
928 * it's doing that, anyway.
929 */
930 tx_pending = card->tx_mask & ~card_flags;
931
932 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
933 if (tx_pending & 1) {
934 struct sk_buff *oldskb = card->tx_skb[port];
935 if (oldskb)
936 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
937 oldskb->len, PCI_DMA_TODEVICE);
938
939 spin_lock(&card->tx_queue_lock);
940 skb = skb_dequeue(&card->tx_queue[port]);
941 if (!skb)
942 card->tx_mask &= ~(1 << port);
943 spin_unlock(&card->tx_queue_lock);
944
945 if (skb && !card->using_dma) {
946 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
947 tx_started |= 1 << port;
948 oldskb = skb; /* We're done with this skb already */
949 } else if (skb && card->using_dma) {
950 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
951 skb->len, PCI_DMA_TODEVICE);
952 iowrite32(SKB_CB(skb)->dma_addr,
953 card->config_regs + TX_DMA_ADDR(port));
954 }
955
956 if (!oldskb)
957 continue;
958
959 /* Clean up and free oldskb now it's gone */
960 if (atmdebug) {
961 dev_info(&card->dev->dev, "Transmitted: port %d\n",
962 port);
963 print_buffer(oldskb);
964 }
965
966 vcc = SKB_CB(oldskb)->vcc;
967
968 if (vcc) {
969 atomic_inc(&vcc->stats->tx);
970 solos_pop(vcc, oldskb);
971 } else
972 dev_kfree_skb_irq(oldskb);
973
974 }
975 }
976 /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
977 if (tx_started)
978 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
979
980 spin_unlock_irqrestore(&card->tx_lock, flags);
981 return card_flags;
982 }
983
984 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
985 {
986 struct solos_card *card = vcc->dev->dev_data;
987 struct pkt_hdr *header;
988 int pktlen;
989
990 pktlen = skb->len;
991 if (pktlen > (BUF_SIZE - sizeof(*header))) {
992 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
993 solos_pop(vcc, skb);
994 return 0;
995 }
996
997 if (!skb_clone_writable(skb, sizeof(*header))) {
998 int expand_by = 0;
999 int ret;
1000
1001 if (skb_headroom(skb) < sizeof(*header))
1002 expand_by = sizeof(*header) - skb_headroom(skb);
1003
1004 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1005 if (ret) {
1006 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1007 solos_pop(vcc, skb);
1008 return ret;
1009 }
1010 }
1011
1012 header = (void *)skb_push(skb, sizeof(*header));
1013
1014 /* This does _not_ include the size of the header */
1015 header->size = cpu_to_le16(pktlen);
1016 header->vpi = cpu_to_le16(vcc->vpi);
1017 header->vci = cpu_to_le16(vcc->vci);
1018 header->type = cpu_to_le16(PKT_DATA);
1019
1020 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1021
1022 return 0;
1023 }
1024
1025 static struct atmdev_ops fpga_ops = {
1026 .open = popen,
1027 .close = pclose,
1028 .ioctl = NULL,
1029 .getsockopt = NULL,
1030 .setsockopt = NULL,
1031 .send = psend,
1032 .send_oam = NULL,
1033 .phy_put = NULL,
1034 .phy_get = NULL,
1035 .change_qos = NULL,
1036 .proc_read = NULL,
1037 .owner = THIS_MODULE
1038 };
1039
1040 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1041 {
1042 int err;
1043 uint16_t fpga_ver;
1044 uint8_t major_ver, minor_ver;
1045 uint32_t data32;
1046 struct solos_card *card;
1047
1048 card = kzalloc(sizeof(*card), GFP_KERNEL);
1049 if (!card)
1050 return -ENOMEM;
1051
1052 card->dev = dev;
1053 init_waitqueue_head(&card->fw_wq);
1054 init_waitqueue_head(&card->param_wq);
1055
1056 err = pci_enable_device(dev);
1057 if (err) {
1058 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1059 goto out;
1060 }
1061
1062 err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1063 if (err) {
1064 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1065 goto out;
1066 }
1067
1068 err = pci_request_regions(dev, "solos");
1069 if (err) {
1070 dev_warn(&dev->dev, "Failed to request regions\n");
1071 goto out;
1072 }
1073
1074 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1075 if (!card->config_regs) {
1076 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1077 goto out_release_regions;
1078 }
1079 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1080 if (!card->buffers) {
1081 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1082 goto out_unmap_config;
1083 }
1084
1085 if (reset) {
1086 iowrite32(1, card->config_regs + FPGA_MODE);
1087 data32 = ioread32(card->config_regs + FPGA_MODE);
1088
1089 iowrite32(0, card->config_regs + FPGA_MODE);
1090 data32 = ioread32(card->config_regs + FPGA_MODE);
1091 }
1092
1093 data32 = ioread32(card->config_regs + FPGA_VER);
1094 fpga_ver = (data32 & 0x0000FFFF);
1095 major_ver = ((data32 & 0xFF000000) >> 24);
1096 minor_ver = ((data32 & 0x00FF0000) >> 16);
1097 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1098 major_ver, minor_ver, fpga_ver);
1099
1100 if (0 && fpga_ver > 27)
1101 card->using_dma = 1;
1102 else {
1103 /* Set RX empty flag for all ports */
1104 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1105 }
1106
1107 data32 = ioread32(card->config_regs + PORTS);
1108 card->nr_ports = (data32 & 0x000000FF);
1109
1110 pci_set_drvdata(dev, card);
1111
1112 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1113 spin_lock_init(&card->tx_lock);
1114 spin_lock_init(&card->tx_queue_lock);
1115 spin_lock_init(&card->cli_queue_lock);
1116 spin_lock_init(&card->param_queue_lock);
1117 INIT_LIST_HEAD(&card->param_queue);
1118
1119 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1120 "solos-pci", card);
1121 if (err) {
1122 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1123 goto out_unmap_both;
1124 }
1125
1126 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1127
1128 if (fpga_upgrade)
1129 flash_upgrade(card, 0);
1130
1131 if (firmware_upgrade)
1132 flash_upgrade(card, 1);
1133
1134 err = atm_init(card);
1135 if (err)
1136 goto out_free_irq;
1137
1138 return 0;
1139
1140 out_free_irq:
1141 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1142 free_irq(dev->irq, card);
1143 tasklet_kill(&card->tlet);
1144
1145 out_unmap_both:
1146 pci_set_drvdata(dev, NULL);
1147 pci_iounmap(dev, card->config_regs);
1148 out_unmap_config:
1149 pci_iounmap(dev, card->buffers);
1150 out_release_regions:
1151 pci_release_regions(dev);
1152 out:
1153 kfree(card);
1154 return err;
1155 }
1156
1157 static int atm_init(struct solos_card *card)
1158 {
1159 int i;
1160
1161 for (i = 0; i < card->nr_ports; i++) {
1162 struct sk_buff *skb;
1163 struct pkt_hdr *header;
1164
1165 skb_queue_head_init(&card->tx_queue[i]);
1166 skb_queue_head_init(&card->cli_queue[i]);
1167
1168 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1169 if (!card->atmdev[i]) {
1170 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1171 atm_remove(card);
1172 return -ENODEV;
1173 }
1174 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1175 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1176 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1177 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1178
1179 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1180
1181 card->atmdev[i]->ci_range.vpi_bits = 8;
1182 card->atmdev[i]->ci_range.vci_bits = 16;
1183 card->atmdev[i]->dev_data = card;
1184 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1185 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1186
1187 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1188 if (!skb) {
1189 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1190 continue;
1191 }
1192
1193 header = (void *)skb_put(skb, sizeof(*header));
1194
1195 header->size = cpu_to_le16(0);
1196 header->vpi = cpu_to_le16(0);
1197 header->vci = cpu_to_le16(0);
1198 header->type = cpu_to_le16(PKT_STATUS);
1199
1200 fpga_queue(card, i, skb, NULL);
1201 }
1202 return 0;
1203 }
1204
1205 static void atm_remove(struct solos_card *card)
1206 {
1207 int i;
1208
1209 for (i = 0; i < card->nr_ports; i++) {
1210 if (card->atmdev[i]) {
1211 struct sk_buff *skb;
1212
1213 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1214
1215 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1216 atm_dev_deregister(card->atmdev[i]);
1217
1218 skb = card->rx_skb[i];
1219 if (skb) {
1220 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1221 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1222 dev_kfree_skb(skb);
1223 }
1224 skb = card->tx_skb[i];
1225 if (skb) {
1226 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1227 skb->len, PCI_DMA_TODEVICE);
1228 dev_kfree_skb(skb);
1229 }
1230 while ((skb = skb_dequeue(&card->tx_queue[i])))
1231 dev_kfree_skb(skb);
1232
1233 }
1234 }
1235 }
1236
1237 static void fpga_remove(struct pci_dev *dev)
1238 {
1239 struct solos_card *card = pci_get_drvdata(dev);
1240
1241 /* Disable IRQs */
1242 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1243
1244 /* Reset FPGA */
1245 iowrite32(1, card->config_regs + FPGA_MODE);
1246 (void)ioread32(card->config_regs + FPGA_MODE);
1247
1248 atm_remove(card);
1249
1250 free_irq(dev->irq, card);
1251 tasklet_kill(&card->tlet);
1252
1253 /* Release device from reset */
1254 iowrite32(0, card->config_regs + FPGA_MODE);
1255 (void)ioread32(card->config_regs + FPGA_MODE);
1256
1257 pci_iounmap(dev, card->buffers);
1258 pci_iounmap(dev, card->config_regs);
1259
1260 pci_release_regions(dev);
1261 pci_disable_device(dev);
1262
1263 pci_set_drvdata(dev, NULL);
1264 kfree(card);
1265 }
1266
1267 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1268 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1269 { 0, }
1270 };
1271
1272 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1273
1274 static struct pci_driver fpga_driver = {
1275 .name = "solos",
1276 .id_table = fpga_pci_tbl,
1277 .probe = fpga_probe,
1278 .remove = fpga_remove,
1279 };
1280
1281
1282 static int __init solos_pci_init(void)
1283 {
1284 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1285 return pci_register_driver(&fpga_driver);
1286 }
1287
1288 static void __exit solos_pci_exit(void)
1289 {
1290 pci_unregister_driver(&fpga_driver);
1291 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1292 }
1293
1294 module_init(solos_pci_init);
1295 module_exit(solos_pci_exit);
Support for the Chinese Samsung S3C2440 based development boards