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solos: Reject non-AAL5 connections.... for now
[deliverable/linux.git] / drivers / atm / solos-pci.c
CommitLineData
9c54004e
DW		 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>
7c4015bd 12 * Treker Chen <treker@xrio.com>
9c54004e
DW		 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>
7c4015bd 40#include <linux/firmware.h>
01e2ffac
DW		 41#include <linux/ctype.h>
42#include <linux/swab.h>
9c54004e 43
7c4015bd 44#define VERSION "0.07"
9c54004e
DW		 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
7c4015bd
SF		 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
9c54004e
DW		 58
59#define DATA_RAM_SIZE 32768
60#define BUF_SIZE 4096
7c4015bd
SF		 61#define FPGA_PAGE 528 /* FPGA flash page size*/
62#define SOLOS_PAGE 512 /* Solos flash page size*/
63#define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
64#define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
9c54004e
DW		 65
66#define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
67#define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
68
69static int debug = 0;
70static int atmdebug = 0;
7c4015bd
SF		 71static int firmware_upgrade = 0;
72static int fpga_upgrade = 0;
9c54004e
DW		 73
74struct pkt_hdr {
75 __le16 size;
76 __le16 vpi;
77 __le16 vci;
78 __le16 type;
79};
80
81#define PKT_DATA 0
82#define PKT_COMMAND 1
83#define PKT_POPEN 3
84#define PKT_PCLOSE 4
87ebb186 85#define PKT_STATUS 5
9c54004e
DW		 86
87struct solos_card {
88 void __iomem *config_regs;
89 void __iomem *buffers;
90 int nr_ports;
91 struct pci_dev *dev;
92 struct atm_dev *atmdev[4];
93 struct tasklet_struct tlet;
94 spinlock_t tx_lock;
95 spinlock_t tx_queue_lock;
96 spinlock_t cli_queue_lock;
01e2ffac
DW		 97 spinlock_t param_queue_lock;
98 struct list_head param_queue;
9c54004e
DW		 99 struct sk_buff_head tx_queue[4];
100 struct sk_buff_head cli_queue[4];
01e2ffac 101 wait_queue_head_t param_wq;
fa755b9f 102 wait_queue_head_t fw_wq;
9c54004e
DW		 103};
104
01e2ffac
DW		 105
106struct solos_param {
107 struct list_head list;
108 pid_t pid;
109 int port;
110 struct sk_buff *response;
111 wait_queue_head_t wq;
112};
113
9c54004e
DW		 114#define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
115
116MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
117MODULE_DESCRIPTION("Solos PCI driver");
118MODULE_VERSION(VERSION);
119MODULE_LICENSE("GPL");
120MODULE_PARM_DESC(debug, "Enable Loopback");
121MODULE_PARM_DESC(atmdebug, "Print ATM data");
7c4015bd
SF		 122MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
123MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
9c54004e 124module_param(debug, int, 0444);
4306cad6 125module_param(atmdebug, int, 0644);
7c4015bd
SF		 126module_param(firmware_upgrade, int, 0444);
127module_param(fpga_upgrade, int, 0444);
9c54004e 128
9c54004e
DW		 129static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
130 struct atm_vcc *vcc);
131static int fpga_tx(struct solos_card *);
132static irqreturn_t solos_irq(int irq, void *dev_id);
133static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
134static int list_vccs(int vci);
1e615df6 135static void release_vccs(struct atm_dev *dev);
9c54004e
DW		 136static int atm_init(struct solos_card *);
137static void atm_remove(struct solos_card *);
138static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
139static void solos_bh(unsigned long);
140static int print_buffer(struct sk_buff *buf);
141
142static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
143{
144 if (vcc->pop)
145 vcc->pop(vcc, skb);
146 else
147 dev_kfree_skb_any(skb);
148}
149
01e2ffac
DW		 150static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
151 char *buf)
152{
153 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
154 struct solos_card *card = atmdev->dev_data;
155 struct solos_param prm;
156 struct sk_buff *skb;
157 struct pkt_hdr *header;
158 int buflen;
159
160 buflen = strlen(attr->attr.name) + 10;
161
162 skb = alloc_skb(buflen, GFP_KERNEL);
163 if (!skb) {
164 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
165 return -ENOMEM;
166 }
167
168 header = (void *)skb_put(skb, sizeof(*header));
169
170 buflen = snprintf((void *)&header[1], buflen - 1,
171 "L%05d\n%s\n", current->pid, attr->attr.name);
172 skb_put(skb, buflen);
173
174 header->size = cpu_to_le16(buflen);
175 header->vpi = cpu_to_le16(0);
176 header->vci = cpu_to_le16(0);
177 header->type = cpu_to_le16(PKT_COMMAND);
178
179 prm.pid = current->pid;
180 prm.response = NULL;
181 prm.port = SOLOS_CHAN(atmdev);
182
183 spin_lock_irq(&card->param_queue_lock);
184 list_add(&prm.list, &card->param_queue);
185 spin_unlock_irq(&card->param_queue_lock);
186
187 fpga_queue(card, prm.port, skb, NULL);
188
189 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
190
191 spin_lock_irq(&card->param_queue_lock);
192 list_del(&prm.list);
193 spin_unlock_irq(&card->param_queue_lock);
194
195 if (!prm.response)
196 return -EIO;
197
198 buflen = prm.response->len;
199 memcpy(buf, prm.response->data, buflen);
200 kfree_skb(prm.response);
201
202 return buflen;
203}
204
205static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
206 const char *buf, size_t count)
207{
208 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
209 struct solos_card *card = atmdev->dev_data;
210 struct solos_param prm;
211 struct sk_buff *skb;
212 struct pkt_hdr *header;
213 int buflen;
214 ssize_t ret;
215
216 buflen = strlen(attr->attr.name) + 11 + count;
217
218 skb = alloc_skb(buflen, GFP_KERNEL);
219 if (!skb) {
220 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
221 return -ENOMEM;
222 }
223
224 header = (void *)skb_put(skb, sizeof(*header));
225
226 buflen = snprintf((void *)&header[1], buflen - 1,
227 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
228
229 skb_put(skb, buflen);
230 header->size = cpu_to_le16(buflen);
231 header->vpi = cpu_to_le16(0);
232 header->vci = cpu_to_le16(0);
233 header->type = cpu_to_le16(PKT_COMMAND);
234
235 prm.pid = current->pid;
236 prm.response = NULL;
237 prm.port = SOLOS_CHAN(atmdev);
238
239 spin_lock_irq(&card->param_queue_lock);
240 list_add(&prm.list, &card->param_queue);
241 spin_unlock_irq(&card->param_queue_lock);
242
243 fpga_queue(card, prm.port, skb, NULL);
244
245 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
246
247 spin_lock_irq(&card->param_queue_lock);
248 list_del(&prm.list);
249 spin_unlock_irq(&card->param_queue_lock);
250
251 skb = prm.response;
252
253 if (!skb)
254 return -EIO;
255
256 buflen = skb->len;
257
258 /* Sometimes it has a newline, sometimes it doesn't. */
259 if (skb->data[buflen - 1] == '\n')
260 buflen--;
261
262 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
263 ret = count;
264 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
265 ret = -EIO;
266 else {
267 /* We know we have enough space allocated for this; we allocated
268 it ourselves */
269 skb->data[buflen] = 0;
270
271 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
272 skb->data);
273 ret = -EIO;
274 }
275 kfree_skb(skb);
276
277 return ret;
278}
279
87ebb186
DW		 280static char *next_string(struct sk_buff *skb)
281{
282 int i = 0;
283 char *this = skb->data;
284
285 while (i < skb->len) {
286 if (this[i] == '\n') {
287 this[i] = 0;
288 skb_pull(skb, i);
289 return this;
290 }
291 }
292 return NULL;
293}
294
295/*
296 * Status packet has fields separated by \n, starting with a version number
297 * for the information therein. Fields are....
298 *
299 * packet version
300 * TxBitRate (version >= 1)
301 * RxBitRate (version >= 1)
302 * State (version >= 1)
303 */
304static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
305{
306 char *str, *end;
307 int ver, rate_up, rate_down, state;
308
309 if (!card->atmdev[port])
310 return -ENODEV;
311
312 str = next_string(skb);
313 if (!str)
314 return -EIO;
315
316 ver = simple_strtol(str, NULL, 10);
317 if (ver < 1) {
318 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
319 ver);
320 return -EIO;
321 }
322
323 str = next_string(skb);
324 rate_up = simple_strtol(str, &end, 10);
325 if (*end)
326 return -EIO;
327
328 str = next_string(skb);
329 rate_down = simple_strtol(str, &end, 10);
330 if (*end)
331 return -EIO;
332
333 str = next_string(skb);
334 if (!strcmp(str, "Showtime"))
335 state = ATM_PHY_SIG_FOUND;
1e615df6
DW		 336 else {
337 state = ATM_PHY_SIG_LOST;
338 release_vccs(card->atmdev[port]);
339 }
87ebb186
DW		 340
341 card->atmdev[port]->link_rate = rate_down;
342 card->atmdev[port]->signal = state;
343
344 dev_info(&card->dev->dev, "ATM state: '%s', %d/%d kb/s up/down.\n",
345 str, rate_up/1000, rate_down/1000);
346 return 0;
347}
348
01e2ffac
DW		 349static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
350{
351 struct solos_param *prm;
352 unsigned long flags;
353 int cmdpid;
354 int found = 0;
355
356 if (skb->len < 7)
357 return 0;
358
359 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
360 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
361 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
362 skb->data[6] != '\n')
363 return 0;
364
365 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
366
367 spin_lock_irqsave(&card->param_queue_lock, flags);
368 list_for_each_entry(prm, &card->param_queue, list) {
369 if (prm->port == port && prm->pid == cmdpid) {
370 prm->response = skb;
371 skb_pull(skb, 7);
372 wake_up(&card->param_wq);
373 found = 1;
374 break;
375 }
376 }
377 spin_unlock_irqrestore(&card->param_queue_lock, flags);
378 return found;
379}
380
9c54004e
DW		 381static ssize_t console_show(struct device *dev, struct device_attribute *attr,
382 char *buf)
383{
384 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
385 struct solos_card *card = atmdev->dev_data;
386 struct sk_buff *skb;
387
388 spin_lock(&card->cli_queue_lock);
389 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
390 spin_unlock(&card->cli_queue_lock);
391 if(skb == NULL)
392 return sprintf(buf, "No data.\n");
393
394 memcpy(buf, skb->data, skb->len);
395 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
396
397 kfree_skb(skb);
398 return skb->len;
399}
400
401static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
402{
403 struct sk_buff *skb;
404 struct pkt_hdr *header;
405
406// dev_dbg(&card->dev->dev, "size: %d\n", size);
407
408 if (size > (BUF_SIZE - sizeof(*header))) {
409 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
410 return 0;
411 }
412 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
413 if (!skb) {
414 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
415 return 0;
416 }
417
418 header = (void *)skb_put(skb, sizeof(*header));
419
420 header->size = cpu_to_le16(size);
421 header->vpi = cpu_to_le16(0);
422 header->vci = cpu_to_le16(0);
423 header->type = cpu_to_le16(PKT_COMMAND);
424
425 memcpy(skb_put(skb, size), buf, size);
426
427 fpga_queue(card, dev, skb, NULL);
428
429 return 0;
430}
431
432static ssize_t console_store(struct device *dev, struct device_attribute *attr,
433 const char *buf, size_t count)
434{
435 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
436 struct solos_card *card = atmdev->dev_data;
437 int err;
438
439 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
440
441 return err?:count;
442}
443
444static DEVICE_ATTR(console, 0644, console_show, console_store);
d057f0a4
DW		 445
446
447#define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
448#define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
449
450#include "solos-attrlist.c"
451
452#undef SOLOS_ATTR_RO
453#undef SOLOS_ATTR_RW
454
455#define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
456#define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
457
458static struct attribute *solos_attrs[] = {
459#include "solos-attrlist.c"
460 NULL
461};
462
463static struct attribute_group solos_attr_group = {
464 .attrs = solos_attrs,
465 .name = "parameters",
466};
9c54004e 467
fa755b9f
DW		 468static int flash_upgrade(struct solos_card *card, int chip)
469{
470 const struct firmware *fw;
471 const char *fw_name;
7c4015bd
SF		 472 uint32_t data32 = 0;
473 int blocksize = 0;
474 int numblocks = 0;
fa755b9f
DW		 475 int offset;
476
477 if (chip == 0) {
478 fw_name = "solos-FPGA.bin";
7c4015bd
SF		 479 blocksize = FPGA_BLOCK;
480 } else {
fa755b9f 481 fw_name = "solos-Firmware.bin";
7c4015bd
SF		 482 blocksize = SOLOS_BLOCK;
483 }
fa755b9f
DW		 484
485 if (request_firmware(&fw, fw_name, &card->dev->dev))
486 return -ENOENT;
487
488 dev_info(&card->dev->dev, "Flash upgrade starting\n");
489
490 numblocks = fw->size / blocksize;
491 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
7c4015bd
SF		 492 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
493
7c4015bd
SF		 494 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
495 iowrite32(1, card->config_regs + FPGA_MODE);
496 data32 = ioread32(card->config_regs + FPGA_MODE);
7c4015bd 497
fa755b9f
DW		 498 /* Set mode to Chip Erase */
499 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
500 chip?"Solos":"FPGA");
501 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
7c4015bd 502
7c4015bd 503
fa755b9f
DW		 504 iowrite32(1, card->config_regs + WRITE_FLASH);
505 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
506
507 for (offset = 0; offset < fw->size; offset += blocksize) {
508 int i;
509
510 /* Clear write flag */
7c4015bd 511 iowrite32(0, card->config_regs + WRITE_FLASH);
7c4015bd 512
fa755b9f
DW		 513 /* Set mode to Block Write */
514 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
515 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
516
517 /* Copy block to buffer, swapping each 16 bits */
518 for(i = 0; i < blocksize; i += 4) {
519 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
520 iowrite32(word, RX_BUF(card, 3) + i);
7c4015bd 521 }
fa755b9f
DW		 522
523 /* Specify block number and then trigger flash write */
524 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
525 iowrite32(1, card->config_regs + WRITE_FLASH);
526 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
7c4015bd
SF		 527 }
528
fa755b9f
DW		 529 release_firmware(fw);
530 iowrite32(0, card->config_regs + WRITE_FLASH);
531 iowrite32(0, card->config_regs + FPGA_MODE);
532 iowrite32(0, card->config_regs + FLASH_MODE);
533 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
534 return 0;
7c4015bd
SF		 535}
536
9c54004e
DW		 537static irqreturn_t solos_irq(int irq, void *dev_id)
538{
539 struct solos_card *card = dev_id;
540 int handled = 1;
541
542 //ACK IRQ
543 iowrite32(0, card->config_regs + IRQ_CLEAR);
544 //Disable IRQs from FPGA
545 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
546
fa755b9f 547 if (card->atmdev[0])
9c54004e 548 tasklet_schedule(&card->tlet);
fa755b9f
DW		 549 else
550 wake_up(&card->fw_wq);
9c54004e
DW		 551
552 //Enable IRQs from FPGA
553 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
554 return IRQ_RETVAL(handled);
555}
556
557void solos_bh(unsigned long card_arg)
558{
559 struct solos_card *card = (void *)card_arg;
560 int port;
561 uint32_t card_flags;
562 uint32_t tx_mask;
563 uint32_t rx_done = 0;
564
565 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
566
567 /* The TX bits are set if the channel is busy; clear if not. We want to
568 invoke fpga_tx() unless _all_ the bits for active channels are set */
569 tx_mask = (1 << card->nr_ports) - 1;
570 if ((card_flags & tx_mask) != tx_mask)
571 fpga_tx(card);
572
573 for (port = 0; port < card->nr_ports; port++) {
574 if (card_flags & (0x10 << port)) {
575 struct pkt_hdr header;
576 struct sk_buff *skb;
577 struct atm_vcc *vcc;
578 int size;
579
580 rx_done |= 0x10 << port;
581
582 memcpy_fromio(&header, RX_BUF(card, port), sizeof(header));
583
584 size = le16_to_cpu(header.size);
585
87ebb186 586 skb = alloc_skb(size + 1, GFP_ATOMIC);
9c54004e
DW		 587 if (!skb) {
588 if (net_ratelimit())
589 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
590 continue;
591 }
592
593 memcpy_fromio(skb_put(skb, size),
594 RX_BUF(card, port) + sizeof(header),
595 size);
596
597 if (atmdebug) {
598 dev_info(&card->dev->dev, "Received: device %d\n", port);
599 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
600 size, le16_to_cpu(header.vpi),
601 le16_to_cpu(header.vci));
602 print_buffer(skb);
603 }
604
605 switch (le16_to_cpu(header.type)) {
606 case PKT_DATA:
607 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header.vpi),
608 le16_to_cpu(header.vci));
609 if (!vcc) {
610 if (net_ratelimit())
611 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
612 le16_to_cpu(header.vci), le16_to_cpu(header.vpi),
613 port);
614 continue;
615 }
616 atm_charge(vcc, skb->truesize);
617 vcc->push(vcc, skb);
618 atomic_inc(&vcc->stats->rx);
619 break;
620
87ebb186
DW		 621 case PKT_STATUS:
622 process_status(card, port, skb);
623 dev_kfree_skb(skb);
624 break;
625
9c54004e
DW		 626 case PKT_COMMAND:
627 default: /* FIXME: Not really, surely? */
01e2ffac
DW		 628 if (process_command(card, port, skb))
629 break;
9c54004e
DW		 630 spin_lock(&card->cli_queue_lock);
631 if (skb_queue_len(&card->cli_queue[port]) > 10) {
632 if (net_ratelimit())
633 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
634 port);
635 } else
636 skb_queue_tail(&card->cli_queue[port], skb);
637 spin_unlock(&card->cli_queue_lock);
638 break;
639 }
640 }
641 }
642 if (rx_done)
643 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
644
645 return;
646}
647
648static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
649{
650 struct hlist_head *head;
651 struct atm_vcc *vcc = NULL;
652 struct hlist_node *node;
653 struct sock *s;
654
655 read_lock(&vcc_sklist_lock);
656 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
657 sk_for_each(s, node, head) {
658 vcc = atm_sk(s);
659 if (vcc->dev == dev && vcc->vci == vci &&
660 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
661 goto out;
662 }
663 vcc = NULL;
664 out:
665 read_unlock(&vcc_sklist_lock);
666 return vcc;
667}
668
669static int list_vccs(int vci)
670{
671 struct hlist_head *head;
672 struct atm_vcc *vcc;
673 struct hlist_node *node;
674 struct sock *s;
675 int num_found = 0;
676 int i;
677
678 read_lock(&vcc_sklist_lock);
679 if (vci != 0){
680 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
681 sk_for_each(s, node, head) {
682 num_found ++;
683 vcc = atm_sk(s);
684 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
685 vcc->dev->number,
686 vcc->vpi,
687 vcc->vci);
688 }
689 } else {
1e615df6 690 for(i = 0; i < VCC_HTABLE_SIZE; i++){
9c54004e
DW		 691 head = &vcc_hash[i];
692 sk_for_each(s, node, head) {
693 num_found ++;
694 vcc = atm_sk(s);
695 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
696 vcc->dev->number,
697 vcc->vpi,
698 vcc->vci);
699 }
700 }
701 }
702 read_unlock(&vcc_sklist_lock);
703 return num_found;
704}
705
1e615df6
DW		 706static void release_vccs(struct atm_dev *dev)
707{
708 int i;
709
710 write_lock_irq(&vcc_sklist_lock);
711 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
712 struct hlist_head *head = &vcc_hash[i];
713 struct hlist_node *node, *tmp;
714 struct sock *s;
715 struct atm_vcc *vcc;
716
717 sk_for_each_safe(s, node, tmp, head) {
718 vcc = atm_sk(s);
719 if (vcc->dev == dev) {
720 vcc_release_async(vcc, -EPIPE);
721 sk_del_node_init(s);
722 }
723 }
724 }
725 write_unlock_irq(&vcc_sklist_lock);
726}
727
9c54004e
DW		 728
729static int popen(struct atm_vcc *vcc)
730{
731 struct solos_card *card = vcc->dev->dev_data;
732 struct sk_buff *skb;
733 struct pkt_hdr *header;
734
b28a4b9a
DW		 735 if (vcc->qos.aal != ATM_AAL5) {
736 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
737 vcc->qos.aal);
738 return -EINVAL;
739 }
740
9c54004e
DW		 741 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
742 if (!skb && net_ratelimit()) {
743 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
744 return -ENOMEM;
745 }
746 header = (void *)skb_put(skb, sizeof(*header));
747
b76811af 748 header->size = cpu_to_le16(0);
9c54004e
DW		 749 header->vpi = cpu_to_le16(vcc->vpi);
750 header->vci = cpu_to_le16(vcc->vci);
751 header->type = cpu_to_le16(PKT_POPEN);
752
753 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
754
755// dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
756 set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
757 set_bit(ATM_VF_READY, &vcc->flags);
758 list_vccs(0);
759
9c54004e
DW		 760
761 return 0;
762}
763
764static void pclose(struct atm_vcc *vcc)
765{
766 struct solos_card *card = vcc->dev->dev_data;
767 struct sk_buff *skb;
768 struct pkt_hdr *header;
769
770 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
771 if (!skb) {
772 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
773 return;
774 }
775 header = (void *)skb_put(skb, sizeof(*header));
776
b76811af 777 header->size = cpu_to_le16(0);
9c54004e
DW		 778 header->vpi = cpu_to_le16(vcc->vpi);
779 header->vci = cpu_to_le16(vcc->vci);
780 header->type = cpu_to_le16(PKT_PCLOSE);
781
782 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
783
784// dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
9c54004e
DW		 785
786 clear_bit(ATM_VF_ADDR, &vcc->flags);
787 clear_bit(ATM_VF_READY, &vcc->flags);
788
789 return;
790}
791
792static int print_buffer(struct sk_buff *buf)
793{
794 int len,i;
795 char msg[500];
796 char item[10];
797
798 len = buf->len;
799 for (i = 0; i < len; i++){
800 if(i % 8 == 0)
801 sprintf(msg, "%02X: ", i);
802
803 sprintf(item,"%02X ",*(buf->data + i));
804 strcat(msg, item);
805 if(i % 8 == 7) {
806 sprintf(item, "\n");
807 strcat(msg, item);
808 printk(KERN_DEBUG "%s", msg);
809 }
810 }
811 if (i % 8 != 0) {
812 sprintf(item, "\n");
813 strcat(msg, item);
814 printk(KERN_DEBUG "%s", msg);
815 }
816 printk(KERN_DEBUG "\n");
817
818 return 0;
819}
820
821static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
822 struct atm_vcc *vcc)
823{
824 int old_len;
825
826 *(void **)skb->cb = vcc;
827
828 spin_lock(&card->tx_queue_lock);
829 old_len = skb_queue_len(&card->tx_queue[port]);
830 skb_queue_tail(&card->tx_queue[port], skb);
831 spin_unlock(&card->tx_queue_lock);
832
833 /* If TX might need to be started, do so */
834 if (!old_len)
835 fpga_tx(card);
836}
837
838static int fpga_tx(struct solos_card *card)
839{
840 uint32_t tx_pending;
841 uint32_t tx_started = 0;
842 struct sk_buff *skb;
843 struct atm_vcc *vcc;
844 unsigned char port;
845 unsigned long flags;
846
847 spin_lock_irqsave(&card->tx_lock, flags);
848
849 tx_pending = ioread32(card->config_regs + FLAGS_ADDR);
850
851 dev_vdbg(&card->dev->dev, "TX Flags are %X\n", tx_pending);
852
853 for (port = 0; port < card->nr_ports; port++) {
854 if (!(tx_pending & (1 << port))) {
855
856 spin_lock(&card->tx_queue_lock);
857 skb = skb_dequeue(&card->tx_queue[port]);
858 spin_unlock(&card->tx_queue_lock);
859
860 if (!skb)
861 continue;
862
863 if (atmdebug) {
864 dev_info(&card->dev->dev, "Transmitted: port %d\n",
865 port);
866 print_buffer(skb);
867 }
868 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
869
870 vcc = *(void **)skb->cb;
871
872 if (vcc) {
873 atomic_inc(&vcc->stats->tx);
874 solos_pop(vcc, skb);
875 } else
876 dev_kfree_skb_irq(skb);
877
878 tx_started |= 1 << port; //Set TX full flag
879 }
880 }
881 if (tx_started)
882 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
883
884 spin_unlock_irqrestore(&card->tx_lock, flags);
885 return 0;
886}
887
888static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
889{
890 struct solos_card *card = vcc->dev->dev_data;
891 struct sk_buff *skb2 = NULL;
892 struct pkt_hdr *header;
b76811af 893 int pktlen;
9c54004e
DW		 894
895 //dev_dbg(&card->dev->dev, "psend called.\n");
896 //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
897
898 if (debug) {
899 skb2 = atm_alloc_charge(vcc, skb->len, GFP_ATOMIC);
900 if (skb2) {
901 memcpy(skb2->data, skb->data, skb->len);
902 skb_put(skb2, skb->len);
903 vcc->push(vcc, skb2);
904 atomic_inc(&vcc->stats->rx);
905 }
906 atomic_inc(&vcc->stats->tx);
907 solos_pop(vcc, skb);
908 return 0;
909 }
910
b76811af
DW		 911 pktlen = skb->len;
912 if (pktlen > (BUF_SIZE - sizeof(*header))) {
9c54004e
DW		 913 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
914 solos_pop(vcc, skb);
915 return 0;
916 }
917
918 if (!skb_clone_writable(skb, sizeof(*header))) {
919 int expand_by = 0;
920 int ret;
921
922 if (skb_headroom(skb) < sizeof(*header))
923 expand_by = sizeof(*header) - skb_headroom(skb);
924
925 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
926 if (ret) {
4306cad6 927 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
9c54004e
DW		 928 solos_pop(vcc, skb);
929 return ret;
930 }
931 }
932
933 header = (void *)skb_push(skb, sizeof(*header));
934
b76811af
DW		 935 /* This does _not_ include the size of the header */
936 header->size = cpu_to_le16(pktlen);
9c54004e
DW		 937 header->vpi = cpu_to_le16(vcc->vpi);
938 header->vci = cpu_to_le16(vcc->vci);
939 header->type = cpu_to_le16(PKT_DATA);
940
941 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
942
943 return 0;
944}
945
946static struct atmdev_ops fpga_ops = {
947 .open = popen,
948 .close = pclose,
949 .ioctl = NULL,
950 .getsockopt = NULL,
951 .setsockopt = NULL,
952 .send = psend,
953 .send_oam = NULL,
954 .phy_put = NULL,
955 .phy_get = NULL,
956 .change_qos = NULL,
957 .proc_read = NULL,
958 .owner = THIS_MODULE
959};
960
961static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
962{
963 int err, i;
964 uint16_t fpga_ver;
965 uint8_t major_ver, minor_ver;
966 uint32_t data32;
967 struct solos_card *card;
968
969 if (debug)
970 return 0;
971
972 card = kzalloc(sizeof(*card), GFP_KERNEL);
973 if (!card)
974 return -ENOMEM;
975
976 card->dev = dev;
fa755b9f 977 init_waitqueue_head(&card->fw_wq);
01e2ffac 978 init_waitqueue_head(&card->param_wq);
9c54004e
DW		 979
980 err = pci_enable_device(dev);
981 if (err) {
982 dev_warn(&dev->dev, "Failed to enable PCI device\n");
983 goto out;
984 }
985
986 err = pci_request_regions(dev, "solos");
987 if (err) {
988 dev_warn(&dev->dev, "Failed to request regions\n");
989 goto out;
990 }
991
992 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
993 if (!card->config_regs) {
994 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
995 goto out_release_regions;
996 }
997 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
998 if (!card->buffers) {
999 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1000 goto out_unmap_config;
1001 }
1002
1003// for(i=0;i<64 ;i+=4){
1004// data32=ioread32(card->buffers + i);
1005// dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1006// }
1007
1008 //Fill Config Mem with zeros
1009 for(i = 0; i < 128; i += 4)
1010 iowrite32(0, card->config_regs + i);
1011
1012 //Set RX empty flags
1013 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1014
1015 data32 = ioread32(card->config_regs + FPGA_VER);
1016 fpga_ver = (data32 & 0x0000FFFF);
1017 major_ver = ((data32 & 0xFF000000) >> 24);
1018 minor_ver = ((data32 & 0x00FF0000) >> 16);
1019 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1020 major_ver, minor_ver, fpga_ver);
1021
1022 card->nr_ports = 2; /* FIXME: Detect daughterboard */
1023
9c54004e 1024 pci_set_drvdata(dev, card);
fa755b9f 1025
9c54004e
DW		 1026 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1027 spin_lock_init(&card->tx_lock);
1028 spin_lock_init(&card->tx_queue_lock);
1029 spin_lock_init(&card->cli_queue_lock);
01e2ffac
DW		 1030 spin_lock_init(&card->param_queue_lock);
1031 INIT_LIST_HEAD(&card->param_queue);
fa755b9f 1032
9c54004e
DW		 1033/*
1034 // Set Loopback mode
1035 data32 = 0x00010000;
1036 iowrite32(data32,card->config_regs + FLAGS_ADDR);
1037*/
1038/*
1039 // Fill Buffers with zeros
1040 for (i = 0; i < BUF_SIZE * 8; i += 4)
1041 iowrite32(0, card->buffers + i);
1042*/
1043/*
1044 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1045 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1046 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1047 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1048
1049 // Read Config Memory
1050 printk(KERN_DEBUG "Reading Config MEM\n");
1051 i = 0;
1052 for(i = 0; i < 16; i++) {
1053 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1054 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1055 (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1056 (unsigned long)data32);
1057 }
1058*/
1059 //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1060 err = request_irq(dev->irq, solos_irq, IRQF_DISABLED|IRQF_SHARED,
1061 "solos-pci", card);
fa755b9f 1062 if (err) {
9c54004e 1063 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
fa755b9f
DW		 1064 goto out_unmap_both;
1065 }
9c54004e
DW		 1066
1067 // Enable IRQs
1068 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1069
fa755b9f
DW		 1070 if (fpga_upgrade)
1071 flash_upgrade(card, 0);
1072
1073 if (firmware_upgrade)
1074 flash_upgrade(card, 1);
1075
1076 err = atm_init(card);
1077 if (err)
1078 goto out_free_irq;
1079
9c54004e
DW		 1080 return 0;
1081
fa755b9f
DW		 1082 out_free_irq:
1083 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1084 free_irq(dev->irq, card);
1085 tasklet_kill(&card->tlet);
1086
9c54004e 1087 out_unmap_both:
fa755b9f 1088 pci_set_drvdata(dev, NULL);
9c54004e
DW		 1089 pci_iounmap(dev, card->config_regs);
1090 out_unmap_config:
1091 pci_iounmap(dev, card->buffers);
1092 out_release_regions:
1093 pci_release_regions(dev);
1094 out:
1095 return err;
1096}
1097
1098static int atm_init(struct solos_card *card)
1099{
1100 int i;
1101
9c54004e 1102 for (i = 0; i < card->nr_ports; i++) {
87ebb186
DW		 1103 struct sk_buff *skb;
1104 struct pkt_hdr *header;
1105
9c54004e
DW		 1106 skb_queue_head_init(&card->tx_queue[i]);
1107 skb_queue_head_init(&card->cli_queue[i]);
1108
1109 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1110 if (!card->atmdev[i]) {
1111 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1112 atm_remove(card);
1113 return -ENODEV;
1114 }
1115 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1116 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
d057f0a4
DW		 1117 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1118 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
9c54004e
DW		 1119
1120 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1121
1122 card->atmdev[i]->ci_range.vpi_bits = 8;
1123 card->atmdev[i]->ci_range.vci_bits = 16;
1124 card->atmdev[i]->dev_data = card;
1125 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
87ebb186
DW		 1126 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1127
1128 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1129 if (!skb) {
1130 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1131 continue;
1132 }
1133
1134 header = (void *)skb_put(skb, sizeof(*header));
1135
1136 header->size = cpu_to_le16(0);
1137 header->vpi = cpu_to_le16(0);
1138 header->vci = cpu_to_le16(0);
1139 header->type = cpu_to_le16(PKT_STATUS);
1140
1141 fpga_queue(card, i, skb, NULL);
9c54004e
DW		 1142 }
1143 return 0;
1144}
1145
1146static void atm_remove(struct solos_card *card)
1147{
1148 int i;
1149
1150 for (i = 0; i < card->nr_ports; i++) {
1151 if (card->atmdev[i]) {
1152 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1153 atm_dev_deregister(card->atmdev[i]);
1154 }
1155 }
1156}
1157
1158static void fpga_remove(struct pci_dev *dev)
1159{
1160 struct solos_card *card = pci_get_drvdata(dev);
1161
1162 if (debug)
1163 return;
1164
1165 atm_remove(card);
1166
1167 dev_vdbg(&dev->dev, "Freeing IRQ\n");
1168 // Disable IRQs from FPGA
1169 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1170 free_irq(dev->irq, card);
1171 tasklet_kill(&card->tlet);
1172
1173 // iowrite32(0x01,pciregs);
1174 dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1175 pci_iounmap(dev, card->buffers);
1176 pci_iounmap(dev, card->config_regs);
1177
1178 dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1179 pci_release_regions(dev);
1180 pci_disable_device(dev);
1181
1182 pci_set_drvdata(dev, NULL);
1183 kfree(card);
1184// dev_dbg(&card->dev->dev, "fpga_remove\n");
1185 return;
1186}
1187
1188static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1189 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1190 { 0, }
1191};
1192
1193MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1194
1195static struct pci_driver fpga_driver = {
1196 .name = "solos",
1197 .id_table = fpga_pci_tbl,
1198 .probe = fpga_probe,
1199 .remove = fpga_remove,
1200};
1201
1202
1203static int __init solos_pci_init(void)
1204{
1205 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1206 return pci_register_driver(&fpga_driver);
1207}
1208
1209static void __exit solos_pci_exit(void)
1210{
1211 pci_unregister_driver(&fpga_driver);
1212 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1213}
1214
1215module_init(solos_pci_init);
1216module_exit(solos_pci_exit);
Linux kernel - Deliverables
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