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solos: Clean up handling of card->tx_mask a little
[linux-2.6/linux-2.6-openrd.git] / drivers / atm / solos-pci.c
blobe7691b3328f9d1b602fd29a02bb49953ca683c8a
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 atmdebug = 0;
74 static int firmware_upgrade = 0;
75 static int fpga_upgrade = 0;
76
77 struct pkt_hdr {
78 __le16 size;
79 __le16 vpi;
80 __le16 vci;
81 __le16 type;
82 };
83
84 struct solos_skb_cb {
85 struct atm_vcc *vcc;
86 uint32_t dma_addr;
87 };
88
89
90 #define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
91
92 #define PKT_DATA 0
93 #define PKT_COMMAND 1
94 #define PKT_POPEN 3
95 #define PKT_PCLOSE 4
96 #define PKT_STATUS 5
97
98 struct solos_card {
99 void __iomem *config_regs;
100 void __iomem *buffers;
101 int nr_ports;
102 int tx_mask;
103 struct pci_dev *dev;
104 struct atm_dev *atmdev[4];
105 struct tasklet_struct tlet;
106 spinlock_t tx_lock;
107 spinlock_t tx_queue_lock;
108 spinlock_t cli_queue_lock;
109 spinlock_t param_queue_lock;
110 struct list_head param_queue;
111 struct sk_buff_head tx_queue[4];
112 struct sk_buff_head cli_queue[4];
113 struct sk_buff *tx_skb[4];
114 struct sk_buff *rx_skb[4];
115 wait_queue_head_t param_wq;
116 wait_queue_head_t fw_wq;
117 int using_dma;
118 };
119
120
121 struct solos_param {
122 struct list_head list;
123 pid_t pid;
124 int port;
125 struct sk_buff *response;
126 };
127
128 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
129
130 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
131 MODULE_DESCRIPTION("Solos PCI driver");
132 MODULE_VERSION(VERSION);
133 MODULE_LICENSE("GPL");
134 MODULE_PARM_DESC(atmdebug, "Print ATM data");
135 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
136 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
137 module_param(atmdebug, int, 0644);
138 module_param(firmware_upgrade, int, 0444);
139 module_param(fpga_upgrade, int, 0444);
140
141 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
142 struct atm_vcc *vcc);
143 static uint32_t fpga_tx(struct solos_card *);
144 static irqreturn_t solos_irq(int irq, void *dev_id);
145 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
146 static int list_vccs(int vci);
147 static void release_vccs(struct atm_dev *dev);
148 static int atm_init(struct solos_card *);
149 static void atm_remove(struct solos_card *);
150 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
151 static void solos_bh(unsigned long);
152 static int print_buffer(struct sk_buff *buf);
153
154 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
155 {
156 if (vcc->pop)
157 vcc->pop(vcc, skb);
158 else
159 dev_kfree_skb_any(skb);
160 }
161
162 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
163 char *buf)
164 {
165 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
166 struct solos_card *card = atmdev->dev_data;
167 struct solos_param prm;
168 struct sk_buff *skb;
169 struct pkt_hdr *header;
170 int buflen;
171
172 buflen = strlen(attr->attr.name) + 10;
173
174 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
175 if (!skb) {
176 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
177 return -ENOMEM;
178 }
179
180 header = (void *)skb_put(skb, sizeof(*header));
181
182 buflen = snprintf((void *)&header[1], buflen - 1,
183 "L%05d\n%s\n", current->pid, attr->attr.name);
184 skb_put(skb, buflen);
185
186 header->size = cpu_to_le16(buflen);
187 header->vpi = cpu_to_le16(0);
188 header->vci = cpu_to_le16(0);
189 header->type = cpu_to_le16(PKT_COMMAND);
190
191 prm.pid = current->pid;
192 prm.response = NULL;
193 prm.port = SOLOS_CHAN(atmdev);
194
195 spin_lock_irq(&card->param_queue_lock);
196 list_add(&prm.list, &card->param_queue);
197 spin_unlock_irq(&card->param_queue_lock);
198
199 fpga_queue(card, prm.port, skb, NULL);
200
201 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
202
203 spin_lock_irq(&card->param_queue_lock);
204 list_del(&prm.list);
205 spin_unlock_irq(&card->param_queue_lock);
206
207 if (!prm.response)
208 return -EIO;
209
210 buflen = prm.response->len;
211 memcpy(buf, prm.response->data, buflen);
212 kfree_skb(prm.response);
213
214 return buflen;
215 }
216
217 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
218 const char *buf, size_t count)
219 {
220 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
221 struct solos_card *card = atmdev->dev_data;
222 struct solos_param prm;
223 struct sk_buff *skb;
224 struct pkt_hdr *header;
225 int buflen;
226 ssize_t ret;
227
228 buflen = strlen(attr->attr.name) + 11 + count;
229
230 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
231 if (!skb) {
232 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
233 return -ENOMEM;
234 }
235
236 header = (void *)skb_put(skb, sizeof(*header));
237
238 buflen = snprintf((void *)&header[1], buflen - 1,
239 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
240
241 skb_put(skb, buflen);
242 header->size = cpu_to_le16(buflen);
243 header->vpi = cpu_to_le16(0);
244 header->vci = cpu_to_le16(0);
245 header->type = cpu_to_le16(PKT_COMMAND);
246
247 prm.pid = current->pid;
248 prm.response = NULL;
249 prm.port = SOLOS_CHAN(atmdev);
250
251 spin_lock_irq(&card->param_queue_lock);
252 list_add(&prm.list, &card->param_queue);
253 spin_unlock_irq(&card->param_queue_lock);
254
255 fpga_queue(card, prm.port, skb, NULL);
256
257 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
258
259 spin_lock_irq(&card->param_queue_lock);
260 list_del(&prm.list);
261 spin_unlock_irq(&card->param_queue_lock);
262
263 skb = prm.response;
264
265 if (!skb)
266 return -EIO;
267
268 buflen = skb->len;
269
270 /* Sometimes it has a newline, sometimes it doesn't. */
271 if (skb->data[buflen - 1] == '\n')
272 buflen--;
273
274 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
275 ret = count;
276 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
277 ret = -EIO;
278 else {
279 /* We know we have enough space allocated for this; we allocated
280 it ourselves */
281 skb->data[buflen] = 0;
282
283 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
284 skb->data);
285 ret = -EIO;
286 }
287 kfree_skb(skb);
288
289 return ret;
290 }
291
292 static char *next_string(struct sk_buff *skb)
293 {
294 int i = 0;
295 char *this = skb->data;
296
297 for (i = 0; i < skb->len; i++) {
298 if (this[i] == '\n') {
299 this[i] = 0;
300 skb_pull(skb, i + 1);
301 return this;
302 }
303 if (!isprint(this[i]))
304 return NULL;
305 }
306 return NULL;
307 }
308
309 /*
310 * Status packet has fields separated by \n, starting with a version number
311 * for the information therein. Fields are....
312 *
313 * packet version
314 * TxBitRate (version >= 1)
315 * RxBitRate (version >= 1)
316 * State (version >= 1)
317 */
318 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
319 {
320 char *str, *end, *state_str;
321 int ver, rate_up, rate_down, state;
322
323 if (!card->atmdev[port])
324 return -ENODEV;
325
326 str = next_string(skb);
327 if (!str)
328 return -EIO;
329
330 ver = simple_strtol(str, NULL, 10);
331 if (ver < 1) {
332 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
333 ver);
334 return -EIO;
335 }
336
337 str = next_string(skb);
338 if (!str)
339 return -EIO;
340 rate_up = simple_strtol(str, &end, 10);
341 if (*end)
342 return -EIO;
343
344 str = next_string(skb);
345 if (!str)
346 return -EIO;
347 rate_down = simple_strtol(str, &end, 10);
348 if (*end)
349 return -EIO;
350
351 state_str = next_string(skb);
352 if (!state_str)
353 return -EIO;
354 if (!strcmp(state_str, "Showtime"))
355 state = ATM_PHY_SIG_FOUND;
356 else {
357 state = ATM_PHY_SIG_LOST;
358 release_vccs(card->atmdev[port]);
359 }
360
361 if (state == ATM_PHY_SIG_LOST) {
362 dev_info(&card->dev->dev, "Port %d ATM state: %s\n",
363 port, state_str);
364 } else {
365 char *snr, *attn;
366
367 snr = next_string(skb);
368 if (!str)
369 return -EIO;
370 attn = next_string(skb);
371 if (!attn)
372 return -EIO;
373
374 dev_info(&card->dev->dev, "Port %d: %s (%d/%d kb/s%s%s%s%s)\n",
375 port, state_str, rate_down/1000, rate_up/1000,
376 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
377 }
378 card->atmdev[port]->link_rate = rate_down / 424;
379 card->atmdev[port]->signal = state;
380
381 return 0;
382 }
383
384 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
385 {
386 struct solos_param *prm;
387 unsigned long flags;
388 int cmdpid;
389 int found = 0;
390
391 if (skb->len < 7)
392 return 0;
393
394 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
395 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
396 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
397 skb->data[6] != '\n')
398 return 0;
399
400 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
401
402 spin_lock_irqsave(&card->param_queue_lock, flags);
403 list_for_each_entry(prm, &card->param_queue, list) {
404 if (prm->port == port && prm->pid == cmdpid) {
405 prm->response = skb;
406 skb_pull(skb, 7);
407 wake_up(&card->param_wq);
408 found = 1;
409 break;
410 }
411 }
412 spin_unlock_irqrestore(&card->param_queue_lock, flags);
413 return found;
414 }
415
416 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
417 char *buf)
418 {
419 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
420 struct solos_card *card = atmdev->dev_data;
421 struct sk_buff *skb;
422
423 spin_lock(&card->cli_queue_lock);
424 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
425 spin_unlock(&card->cli_queue_lock);
426 if(skb == NULL)
427 return sprintf(buf, "No data.\n");
428
429 memcpy(buf, skb->data, skb->len);
430 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
431
432 kfree_skb(skb);
433 return skb->len;
434 }
435
436 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
437 {
438 struct sk_buff *skb;
439 struct pkt_hdr *header;
440
441 if (size > (BUF_SIZE - sizeof(*header))) {
442 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
443 return 0;
444 }
445 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
446 if (!skb) {
447 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
448 return 0;
449 }
450
451 header = (void *)skb_put(skb, sizeof(*header));
452
453 header->size = cpu_to_le16(size);
454 header->vpi = cpu_to_le16(0);
455 header->vci = cpu_to_le16(0);
456 header->type = cpu_to_le16(PKT_COMMAND);
457
458 memcpy(skb_put(skb, size), buf, size);
459
460 fpga_queue(card, dev, skb, NULL);
461
462 return 0;
463 }
464
465 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
466 const char *buf, size_t count)
467 {
468 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
469 struct solos_card *card = atmdev->dev_data;
470 int err;
471
472 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
473
474 return err?:count;
475 }
476
477 static DEVICE_ATTR(console, 0644, console_show, console_store);
478
479
480 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
481 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
482
483 #include "solos-attrlist.c"
484
485 #undef SOLOS_ATTR_RO
486 #undef SOLOS_ATTR_RW
487
488 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
489 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
490
491 static struct attribute *solos_attrs[] = {
492 #include "solos-attrlist.c"
493 NULL
494 };
495
496 static struct attribute_group solos_attr_group = {
497 .attrs = solos_attrs,
498 .name = "parameters",
499 };
500
501 static int flash_upgrade(struct solos_card *card, int chip)
502 {
503 const struct firmware *fw;
504 const char *fw_name;
505 uint32_t data32 = 0;
506 int blocksize = 0;
507 int numblocks = 0;
508 int offset;
509
510 if (chip == 0) {
511 fw_name = "solos-FPGA.bin";
512 blocksize = FPGA_BLOCK;
513 } else {
514 fw_name = "solos-Firmware.bin";
515 blocksize = SOLOS_BLOCK;
516 }
517
518 if (request_firmware(&fw, fw_name, &card->dev->dev))
519 return -ENOENT;
520
521 dev_info(&card->dev->dev, "Flash upgrade starting\n");
522
523 numblocks = fw->size / blocksize;
524 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
525 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
526
527 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
528 iowrite32(1, card->config_regs + FPGA_MODE);
529 data32 = ioread32(card->config_regs + FPGA_MODE);
530
531 /* Set mode to Chip Erase */
532 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
533 chip?"Solos":"FPGA");
534 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
535
536
537 iowrite32(1, card->config_regs + WRITE_FLASH);
538 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
539
540 for (offset = 0; offset < fw->size; offset += blocksize) {
541 int i;
542
543 /* Clear write flag */
544 iowrite32(0, card->config_regs + WRITE_FLASH);
545
546 /* Set mode to Block Write */
547 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
548 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
549
550 /* Copy block to buffer, swapping each 16 bits */
551 for(i = 0; i < blocksize; i += 4) {
552 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
553 iowrite32(word, RX_BUF(card, 3) + i);
554 }
555
556 /* Specify block number and then trigger flash write */
557 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
558 iowrite32(1, card->config_regs + WRITE_FLASH);
559 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
560 }
561
562 release_firmware(fw);
563 iowrite32(0, card->config_regs + WRITE_FLASH);
564 iowrite32(0, card->config_regs + FPGA_MODE);
565 iowrite32(0, card->config_regs + FLASH_MODE);
566 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
567 return 0;
568 }
569
570 static irqreturn_t solos_irq(int irq, void *dev_id)
571 {
572 struct solos_card *card = dev_id;
573 int handled = 1;
574
575 iowrite32(0, card->config_regs + IRQ_CLEAR);
576
577 /* If we're up and running, just kick the tasklet to process TX/RX */
578 if (card->atmdev[0])
579 tasklet_schedule(&card->tlet);
580 else
581 wake_up(&card->fw_wq);
582
583 return IRQ_RETVAL(handled);
584 }
585
586 void solos_bh(unsigned long card_arg)
587 {
588 struct solos_card *card = (void *)card_arg;
589 uint32_t card_flags;
590 uint32_t rx_done = 0;
591 int port;
592
593 /*
594 * Since fpga_tx() is going to need to read the flags under its lock,
595 * it can return them to us so that we don't have to hit PCI MMIO
596 * again for the same information
597 */
598 card_flags = fpga_tx(card);
599
600 for (port = 0; port < card->nr_ports; port++) {
601 if (card_flags & (0x10 << port)) {
602 struct pkt_hdr _hdr, *header;
603 struct sk_buff *skb;
604 struct atm_vcc *vcc;
605 int size;
606
607 if (card->using_dma) {
608 skb = card->rx_skb[port];
609 card->rx_skb[port] = NULL;
610
611 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
612 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
613
614 header = (void *)skb->data;
615 size = le16_to_cpu(header->size);
616 skb_put(skb, size + sizeof(*header));
617 skb_pull(skb, sizeof(*header));
618 } else {
619 header = &_hdr;
620
621 rx_done |= 0x10 << port;
622
623 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
624
625 size = le16_to_cpu(header->size);
626
627 skb = alloc_skb(size + 1, GFP_ATOMIC);
628 if (!skb) {
629 if (net_ratelimit())
630 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
631 continue;
632 }
633
634 memcpy_fromio(skb_put(skb, size),
635 RX_BUF(card, port) + sizeof(*header),
636 size);
637 }
638 if (atmdebug) {
639 dev_info(&card->dev->dev, "Received: device %d\n", port);
640 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
641 size, le16_to_cpu(header->vpi),
642 le16_to_cpu(header->vci));
643 print_buffer(skb);
644 }
645
646 switch (le16_to_cpu(header->type)) {
647 case PKT_DATA:
648 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
649 le16_to_cpu(header->vci));
650 if (!vcc) {
651 if (net_ratelimit())
652 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
653 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
654 port);
655 continue;
656 }
657 atm_charge(vcc, skb->truesize);
658 vcc->push(vcc, skb);
659 atomic_inc(&vcc->stats->rx);
660 break;
661
662 case PKT_STATUS:
663 process_status(card, port, skb);
664 dev_kfree_skb_any(skb);
665 break;
666
667 case PKT_COMMAND:
668 default: /* FIXME: Not really, surely? */
669 if (process_command(card, port, skb))
670 break;
671 spin_lock(&card->cli_queue_lock);
672 if (skb_queue_len(&card->cli_queue[port]) > 10) {
673 if (net_ratelimit())
674 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
675 port);
676 dev_kfree_skb_any(skb);
677 } else
678 skb_queue_tail(&card->cli_queue[port], skb);
679 spin_unlock(&card->cli_queue_lock);
680 break;
681 }
682 }
683 /* Allocate RX skbs for any ports which need them */
684 if (card->using_dma && card->atmdev[port] &&
685 !card->rx_skb[port]) {
686 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
687 if (skb) {
688 SKB_CB(skb)->dma_addr =
689 pci_map_single(card->dev, skb->data,
690 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
691 iowrite32(SKB_CB(skb)->dma_addr,
692 card->config_regs + RX_DMA_ADDR(port));
693 card->rx_skb[port] = skb;
694 } else {
695 if (net_ratelimit())
696 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
697
698 /* We'll have to try again later */
699 tasklet_schedule(&card->tlet);
700 }
701 }
702 }
703 if (rx_done)
704 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
705
706 return;
707 }
708
709 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
710 {
711 struct hlist_head *head;
712 struct atm_vcc *vcc = NULL;
713 struct hlist_node *node;
714 struct sock *s;
715
716 read_lock(&vcc_sklist_lock);
717 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
718 sk_for_each(s, node, head) {
719 vcc = atm_sk(s);
720 if (vcc->dev == dev && vcc->vci == vci &&
721 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
722 goto out;
723 }
724 vcc = NULL;
725 out:
726 read_unlock(&vcc_sklist_lock);
727 return vcc;
728 }
729
730 static int list_vccs(int vci)
731 {
732 struct hlist_head *head;
733 struct atm_vcc *vcc;
734 struct hlist_node *node;
735 struct sock *s;
736 int num_found = 0;
737 int i;
738
739 read_lock(&vcc_sklist_lock);
740 if (vci != 0){
741 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
742 sk_for_each(s, node, head) {
743 num_found ++;
744 vcc = atm_sk(s);
745 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
746 vcc->dev->number,
747 vcc->vpi,
748 vcc->vci);
749 }
750 } else {
751 for(i = 0; i < VCC_HTABLE_SIZE; i++){
752 head = &vcc_hash[i];
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 }
762 }
763 read_unlock(&vcc_sklist_lock);
764 return num_found;
765 }
766
767 static void release_vccs(struct atm_dev *dev)
768 {
769 int i;
770
771 write_lock_irq(&vcc_sklist_lock);
772 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
773 struct hlist_head *head = &vcc_hash[i];
774 struct hlist_node *node, *tmp;
775 struct sock *s;
776 struct atm_vcc *vcc;
777
778 sk_for_each_safe(s, node, tmp, head) {
779 vcc = atm_sk(s);
780 if (vcc->dev == dev) {
781 vcc_release_async(vcc, -EPIPE);
782 sk_del_node_init(s);
783 }
784 }
785 }
786 write_unlock_irq(&vcc_sklist_lock);
787 }
788
789
790 static int popen(struct atm_vcc *vcc)
791 {
792 struct solos_card *card = vcc->dev->dev_data;
793 struct sk_buff *skb;
794 struct pkt_hdr *header;
795
796 if (vcc->qos.aal != ATM_AAL5) {
797 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
798 vcc->qos.aal);
799 return -EINVAL;
800 }
801
802 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
803 if (!skb && net_ratelimit()) {
804 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
805 return -ENOMEM;
806 }
807 header = (void *)skb_put(skb, sizeof(*header));
808
809 header->size = cpu_to_le16(0);
810 header->vpi = cpu_to_le16(vcc->vpi);
811 header->vci = cpu_to_le16(vcc->vci);
812 header->type = cpu_to_le16(PKT_POPEN);
813
814 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
815
816 // dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
817 set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
818 set_bit(ATM_VF_READY, &vcc->flags);
819 list_vccs(0);
820
821
822 return 0;
823 }
824
825 static void pclose(struct atm_vcc *vcc)
826 {
827 struct solos_card *card = vcc->dev->dev_data;
828 struct sk_buff *skb;
829 struct pkt_hdr *header;
830
831 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
832 if (!skb) {
833 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
834 return;
835 }
836 header = (void *)skb_put(skb, sizeof(*header));
837
838 header->size = cpu_to_le16(0);
839 header->vpi = cpu_to_le16(vcc->vpi);
840 header->vci = cpu_to_le16(vcc->vci);
841 header->type = cpu_to_le16(PKT_PCLOSE);
842
843 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
844
845 // dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
846
847 clear_bit(ATM_VF_ADDR, &vcc->flags);
848 clear_bit(ATM_VF_READY, &vcc->flags);
849
850 return;
851 }
852
853 static int print_buffer(struct sk_buff *buf)
854 {
855 int len,i;
856 char msg[500];
857 char item[10];
858
859 len = buf->len;
860 for (i = 0; i < len; i++){
861 if(i % 8 == 0)
862 sprintf(msg, "%02X: ", i);
863
864 sprintf(item,"%02X ",*(buf->data + i));
865 strcat(msg, item);
866 if(i % 8 == 7) {
867 sprintf(item, "\n");
868 strcat(msg, item);
869 printk(KERN_DEBUG "%s", msg);
870 }
871 }
872 if (i % 8 != 0) {
873 sprintf(item, "\n");
874 strcat(msg, item);
875 printk(KERN_DEBUG "%s", msg);
876 }
877 printk(KERN_DEBUG "\n");
878
879 return 0;
880 }
881
882 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
883 struct atm_vcc *vcc)
884 {
885 int old_len;
886 unsigned long flags;
887
888 SKB_CB(skb)->vcc = vcc;
889
890 spin_lock_irqsave(&card->tx_queue_lock, flags);
891 old_len = skb_queue_len(&card->tx_queue[port]);
892 skb_queue_tail(&card->tx_queue[port], skb);
893 if (!old_len)
894 card->tx_mask |= (1 << port);
895 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
896
897 /* Theoretically we could just schedule the tasklet here, but
898 that introduces latency we don't want -- it's noticeable */
899 if (!old_len)
900 fpga_tx(card);
901 }
902
903 static uint32_t fpga_tx(struct solos_card *card)
904 {
905 uint32_t tx_pending, card_flags;
906 uint32_t tx_started = 0;
907 struct sk_buff *skb;
908 struct atm_vcc *vcc;
909 unsigned char port;
910 unsigned long flags;
911
912 spin_lock_irqsave(&card->tx_lock, flags);
913
914 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
915 /*
916 * The queue lock is required for _writing_ to tx_mask, but we're
917 * OK to read it here without locking. The only potential update
918 * that we could race with is in fpga_queue() where it sets a bit
919 * for a new port... but it's going to call this function again if
920 * it's doing that, anyway.
921 */
922 tx_pending = card->tx_mask & ~card_flags;
923
924 for (port = 0; tx_pending; tx_pending >>= 1, port++) {
925 if (tx_pending & 1) {
926 struct sk_buff *oldskb = card->tx_skb[port];
927 if (oldskb)
928 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
929 oldskb->len, PCI_DMA_TODEVICE);
930
931 spin_lock(&card->tx_queue_lock);
932 skb = skb_dequeue(&card->tx_queue[port]);
933 if (!skb)
934 card->tx_mask &= ~(1 << port);
935 spin_unlock(&card->tx_queue_lock);
936
937 if (skb && !card->using_dma) {
938 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
939 tx_started |= 1 << port; //Set TX full flag
940 oldskb = skb; /* We're done with this skb already */
941 } else if (skb && card->using_dma) {
942 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
943 skb->len, PCI_DMA_TODEVICE);
944 iowrite32(SKB_CB(skb)->dma_addr,
945 card->config_regs + TX_DMA_ADDR(port));
946 }
947
948 if (!oldskb)
949 continue;
950
951 /* Clean up and free oldskb now it's gone */
952 if (atmdebug) {
953 dev_info(&card->dev->dev, "Transmitted: port %d\n",
954 port);
955 print_buffer(oldskb);
956 }
957
958 vcc = SKB_CB(oldskb)->vcc;
959
960 if (vcc) {
961 atomic_inc(&vcc->stats->tx);
962 solos_pop(vcc, oldskb);
963 } else
964 dev_kfree_skb_irq(oldskb);
965
966 }
967 }
968 if (tx_started)
969 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
970
971 out:
972 spin_unlock_irqrestore(&card->tx_lock, flags);
973 return card_flags;
974 }
975
976 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
977 {
978 struct solos_card *card = vcc->dev->dev_data;
979 struct pkt_hdr *header;
980 int pktlen;
981
982 //dev_dbg(&card->dev->dev, "psend called.\n");
983 //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
984
985 pktlen = skb->len;
986 if (pktlen > (BUF_SIZE - sizeof(*header))) {
987 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
988 solos_pop(vcc, skb);
989 return 0;
990 }
991
992 if (!skb_clone_writable(skb, sizeof(*header))) {
993 int expand_by = 0;
994 int ret;
995
996 if (skb_headroom(skb) < sizeof(*header))
997 expand_by = sizeof(*header) - skb_headroom(skb);
998
999 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1000 if (ret) {
1001 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1002 solos_pop(vcc, skb);
1003 return ret;
1004 }
1005 }
1006
1007 header = (void *)skb_push(skb, sizeof(*header));
1008
1009 /* This does _not_ include the size of the header */
1010 header->size = cpu_to_le16(pktlen);
1011 header->vpi = cpu_to_le16(vcc->vpi);
1012 header->vci = cpu_to_le16(vcc->vci);
1013 header->type = cpu_to_le16(PKT_DATA);
1014
1015 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1016
1017 return 0;
1018 }
1019
1020 static struct atmdev_ops fpga_ops = {
1021 .open = popen,
1022 .close = pclose,
1023 .ioctl = NULL,
1024 .getsockopt = NULL,
1025 .setsockopt = NULL,
1026 .send = psend,
1027 .send_oam = NULL,
1028 .phy_put = NULL,
1029 .phy_get = NULL,
1030 .change_qos = NULL,
1031 .proc_read = NULL,
1032 .owner = THIS_MODULE
1033 };
1034
1035 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1036 {
1037 int err, i;
1038 uint16_t fpga_ver;
1039 uint8_t major_ver, minor_ver;
1040 uint32_t data32;
1041 struct solos_card *card;
1042
1043 card = kzalloc(sizeof(*card), GFP_KERNEL);
1044 if (!card)
1045 return -ENOMEM;
1046
1047 card->dev = dev;
1048 init_waitqueue_head(&card->fw_wq);
1049 init_waitqueue_head(&card->param_wq);
1050
1051 err = pci_enable_device(dev);
1052 if (err) {
1053 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1054 goto out;
1055 }
1056
1057 err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1058 if (err) {
1059 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1060 goto out;
1061 }
1062
1063 err = pci_request_regions(dev, "solos");
1064 if (err) {
1065 dev_warn(&dev->dev, "Failed to request regions\n");
1066 goto out;
1067 }
1068
1069 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1070 if (!card->config_regs) {
1071 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1072 goto out_release_regions;
1073 }
1074 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1075 if (!card->buffers) {
1076 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1077 goto out_unmap_config;
1078 }
1079
1080 // for(i=0;i<64 ;i+=4){
1081 // data32=ioread32(card->buffers + i);
1082 // dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1083 // }
1084
1085 //Fill Config Mem with zeros
1086 for(i = 0; i < 128; i += 4)
1087 iowrite32(0, card->config_regs + i);
1088
1089 //Set RX empty flags
1090 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1091
1092 data32 = ioread32(card->config_regs + FPGA_VER);
1093 fpga_ver = (data32 & 0x0000FFFF);
1094 major_ver = ((data32 & 0xFF000000) >> 24);
1095 minor_ver = ((data32 & 0x00FF0000) >> 16);
1096 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1097 major_ver, minor_ver, fpga_ver);
1098
1099 if (fpga_ver > 27)
1100 card->using_dma = 1;
1101
1102 card->nr_ports = 2; /* FIXME: Detect daughterboard */
1103
1104 pci_set_drvdata(dev, card);
1105
1106 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1107 spin_lock_init(&card->tx_lock);
1108 spin_lock_init(&card->tx_queue_lock);
1109 spin_lock_init(&card->cli_queue_lock);
1110 spin_lock_init(&card->param_queue_lock);
1111 INIT_LIST_HEAD(&card->param_queue);
1112
1113 /*
1114 // Set Loopback mode
1115 data32 = 0x00010000;
1116 iowrite32(data32,card->config_regs + FLAGS_ADDR);
1117 */
1118 /*
1119 // Fill Buffers with zeros
1120 for (i = 0; i < BUF_SIZE * 8; i += 4)
1121 iowrite32(0, card->buffers + i);
1122 */
1123 /*
1124 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1125 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1126 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1127 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1128
1129 // Read Config Memory
1130 printk(KERN_DEBUG "Reading Config MEM\n");
1131 i = 0;
1132 for(i = 0; i < 16; i++) {
1133 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1134 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1135 (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1136 (unsigned long)data32);
1137 }
1138 */
1139 //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1140 err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1141 "solos-pci", card);
1142 if (err) {
1143 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1144 goto out_unmap_both;
1145 }
1146
1147 // Enable IRQs
1148 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1149
1150 if (fpga_upgrade)
1151 flash_upgrade(card, 0);
1152
1153 if (firmware_upgrade)
1154 flash_upgrade(card, 1);
1155
1156 err = atm_init(card);
1157 if (err)
1158 goto out_free_irq;
1159
1160 return 0;
1161
1162 out_free_irq:
1163 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1164 free_irq(dev->irq, card);
1165 tasklet_kill(&card->tlet);
1166
1167 out_unmap_both:
1168 pci_set_drvdata(dev, NULL);
1169 pci_iounmap(dev, card->config_regs);
1170 out_unmap_config:
1171 pci_iounmap(dev, card->buffers);
1172 out_release_regions:
1173 pci_release_regions(dev);
1174 out:
1175 return err;
1176 }
1177
1178 static int atm_init(struct solos_card *card)
1179 {
1180 int i;
1181
1182 for (i = 0; i < card->nr_ports; i++) {
1183 struct sk_buff *skb;
1184 struct pkt_hdr *header;
1185
1186 skb_queue_head_init(&card->tx_queue[i]);
1187 skb_queue_head_init(&card->cli_queue[i]);
1188
1189 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1190 if (!card->atmdev[i]) {
1191 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1192 atm_remove(card);
1193 return -ENODEV;
1194 }
1195 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1196 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1197 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1198 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1199
1200 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1201
1202 card->atmdev[i]->ci_range.vpi_bits = 8;
1203 card->atmdev[i]->ci_range.vci_bits = 16;
1204 card->atmdev[i]->dev_data = card;
1205 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1206 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1207
1208 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1209 if (!skb) {
1210 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1211 continue;
1212 }
1213
1214 header = (void *)skb_put(skb, sizeof(*header));
1215
1216 header->size = cpu_to_le16(0);
1217 header->vpi = cpu_to_le16(0);
1218 header->vci = cpu_to_le16(0);
1219 header->type = cpu_to_le16(PKT_STATUS);
1220
1221 fpga_queue(card, i, skb, NULL);
1222 }
1223 return 0;
1224 }
1225
1226 static void atm_remove(struct solos_card *card)
1227 {
1228 int i;
1229
1230 for (i = 0; i < card->nr_ports; i++) {
1231 if (card->atmdev[i]) {
1232 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1233
1234 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1235 atm_dev_deregister(card->atmdev[i]);
1236 }
1237 }
1238 }
1239
1240 static void fpga_remove(struct pci_dev *dev)
1241 {
1242 struct solos_card *card = pci_get_drvdata(dev);
1243
1244 atm_remove(card);
1245
1246 dev_vdbg(&dev->dev, "Freeing IRQ\n");
1247 // Disable IRQs from FPGA
1248 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1249 free_irq(dev->irq, card);
1250 tasklet_kill(&card->tlet);
1251
1252 // iowrite32(0x01,pciregs);
1253 dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1254 pci_iounmap(dev, card->buffers);
1255 pci_iounmap(dev, card->config_regs);
1256
1257 dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1258 pci_release_regions(dev);
1259 pci_disable_device(dev);
1260
1261 pci_set_drvdata(dev, NULL);
1262 kfree(card);
1263 // dev_dbg(&card->dev->dev, "fpga_remove\n");
1264 return;
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);
linux 2.6 git repository for openrd