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solos: Tidy up tx_mask handling for ports which need TX
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / atm / solos-pci.c
blobbf59c407fec9fdab2f4f558ee262778f1e6c5c64
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 debug = 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 wait_queue_head_t wq;
128 };
129
130 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
131
132 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
133 MODULE_DESCRIPTION("Solos PCI driver");
134 MODULE_VERSION(VERSION);
135 MODULE_LICENSE("GPL");
136 MODULE_PARM_DESC(debug, "Enable Loopback");
137 MODULE_PARM_DESC(atmdebug, "Print ATM data");
138 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
139 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
140 module_param(debug, int, 0444);
141 module_param(atmdebug, int, 0644);
142 module_param(firmware_upgrade, int, 0444);
143 module_param(fpga_upgrade, int, 0444);
144
145 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
146 struct atm_vcc *vcc);
147 static int fpga_tx(struct solos_card *);
148 static irqreturn_t solos_irq(int irq, void *dev_id);
149 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
150 static int list_vccs(int vci);
151 static void release_vccs(struct atm_dev *dev);
152 static int atm_init(struct solos_card *);
153 static void atm_remove(struct solos_card *);
154 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
155 static void solos_bh(unsigned long);
156 static int print_buffer(struct sk_buff *buf);
157
158 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
159 {
160 if (vcc->pop)
161 vcc->pop(vcc, skb);
162 else
163 dev_kfree_skb_any(skb);
164 }
165
166 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
167 char *buf)
168 {
169 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
170 struct solos_card *card = atmdev->dev_data;
171 struct solos_param prm;
172 struct sk_buff *skb;
173 struct pkt_hdr *header;
174 int buflen;
175
176 buflen = strlen(attr->attr.name) + 10;
177
178 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
179 if (!skb) {
180 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
181 return -ENOMEM;
182 }
183
184 header = (void *)skb_put(skb, sizeof(*header));
185
186 buflen = snprintf((void *)&header[1], buflen - 1,
187 "L%05d\n%s\n", current->pid, attr->attr.name);
188 skb_put(skb, buflen);
189
190 header->size = cpu_to_le16(buflen);
191 header->vpi = cpu_to_le16(0);
192 header->vci = cpu_to_le16(0);
193 header->type = cpu_to_le16(PKT_COMMAND);
194
195 prm.pid = current->pid;
196 prm.response = NULL;
197 prm.port = SOLOS_CHAN(atmdev);
198
199 spin_lock_irq(&card->param_queue_lock);
200 list_add(&prm.list, &card->param_queue);
201 spin_unlock_irq(&card->param_queue_lock);
202
203 fpga_queue(card, prm.port, skb, NULL);
204
205 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
206
207 spin_lock_irq(&card->param_queue_lock);
208 list_del(&prm.list);
209 spin_unlock_irq(&card->param_queue_lock);
210
211 if (!prm.response)
212 return -EIO;
213
214 buflen = prm.response->len;
215 memcpy(buf, prm.response->data, buflen);
216 kfree_skb(prm.response);
217
218 return buflen;
219 }
220
221 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
222 const char *buf, size_t count)
223 {
224 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
225 struct solos_card *card = atmdev->dev_data;
226 struct solos_param prm;
227 struct sk_buff *skb;
228 struct pkt_hdr *header;
229 int buflen;
230 ssize_t ret;
231
232 buflen = strlen(attr->attr.name) + 11 + count;
233
234 skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
235 if (!skb) {
236 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
237 return -ENOMEM;
238 }
239
240 header = (void *)skb_put(skb, sizeof(*header));
241
242 buflen = snprintf((void *)&header[1], buflen - 1,
243 "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
244
245 skb_put(skb, buflen);
246 header->size = cpu_to_le16(buflen);
247 header->vpi = cpu_to_le16(0);
248 header->vci = cpu_to_le16(0);
249 header->type = cpu_to_le16(PKT_COMMAND);
250
251 prm.pid = current->pid;
252 prm.response = NULL;
253 prm.port = SOLOS_CHAN(atmdev);
254
255 spin_lock_irq(&card->param_queue_lock);
256 list_add(&prm.list, &card->param_queue);
257 spin_unlock_irq(&card->param_queue_lock);
258
259 fpga_queue(card, prm.port, skb, NULL);
260
261 wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
262
263 spin_lock_irq(&card->param_queue_lock);
264 list_del(&prm.list);
265 spin_unlock_irq(&card->param_queue_lock);
266
267 skb = prm.response;
268
269 if (!skb)
270 return -EIO;
271
272 buflen = skb->len;
273
274 /* Sometimes it has a newline, sometimes it doesn't. */
275 if (skb->data[buflen - 1] == '\n')
276 buflen--;
277
278 if (buflen == 2 && !strncmp(skb->data, "OK", 2))
279 ret = count;
280 else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
281 ret = -EIO;
282 else {
283 /* We know we have enough space allocated for this; we allocated
284 it ourselves */
285 skb->data[buflen] = 0;
286
287 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
288 skb->data);
289 ret = -EIO;
290 }
291 kfree_skb(skb);
292
293 return ret;
294 }
295
296 static char *next_string(struct sk_buff *skb)
297 {
298 int i = 0;
299 char *this = skb->data;
300
301 while (i < skb->len) {
302 if (this[i] == '\n') {
303 this[i] = 0;
304 skb_pull(skb, i);
305 return this;
306 }
307 }
308 return NULL;
309 }
310
311 /*
312 * Status packet has fields separated by \n, starting with a version number
313 * for the information therein. Fields are....
314 *
315 * packet version
316 * TxBitRate (version >= 1)
317 * RxBitRate (version >= 1)
318 * State (version >= 1)
319 */
320 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
321 {
322 char *str, *end, *state_str;
323 int ver, rate_up, rate_down, state, snr, attn;
324
325 if (!card->atmdev[port])
326 return -ENODEV;
327
328 str = next_string(skb);
329 if (!str)
330 return -EIO;
331
332 ver = simple_strtol(str, NULL, 10);
333 if (ver < 1) {
334 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
335 ver);
336 return -EIO;
337 }
338
339 str = next_string(skb);
340 rate_up = simple_strtol(str, &end, 10);
341 if (*end)
342 return -EIO;
343
344 str = next_string(skb);
345 rate_down = simple_strtol(str, &end, 10);
346 if (*end)
347 return -EIO;
348
349 state_str = next_string(skb);
350 if (!strcmp(state_str, "Showtime"))
351 state = ATM_PHY_SIG_FOUND;
352 else {
353 state = ATM_PHY_SIG_LOST;
354 release_vccs(card->atmdev[port]);
355 }
356
357 str = next_string(skb);
358 snr = simple_strtol(str, &end, 10);
359 if (*end)
360 return -EIO;
361
362 str = next_string(skb);
363 attn = simple_strtol(str, &end, 10);
364 if (*end)
365 return -EIO;
366
367 if (state == ATM_PHY_SIG_LOST && !rate_up && !rate_down)
368 dev_info(&card->dev->dev, "Port %d ATM state: %s\n",
369 port, state_str);
370 else
371 dev_info(&card->dev->dev, "Port %d ATM state: %s (%d/%d kb/s, SNR %ddB, Attn %ddB)\n",
372 port, state_str, rate_up/1000, rate_down/1000,
373 snr, attn);
374
375 card->atmdev[port]->link_rate = rate_down;
376 card->atmdev[port]->signal = state;
377
378 return 0;
379 }
380
381 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
382 {
383 struct solos_param *prm;
384 unsigned long flags;
385 int cmdpid;
386 int found = 0;
387
388 if (skb->len < 7)
389 return 0;
390
391 if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
392 !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
393 !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
394 skb->data[6] != '\n')
395 return 0;
396
397 cmdpid = simple_strtol(&skb->data[1], NULL, 10);
398
399 spin_lock_irqsave(&card->param_queue_lock, flags);
400 list_for_each_entry(prm, &card->param_queue, list) {
401 if (prm->port == port && prm->pid == cmdpid) {
402 prm->response = skb;
403 skb_pull(skb, 7);
404 wake_up(&card->param_wq);
405 found = 1;
406 break;
407 }
408 }
409 spin_unlock_irqrestore(&card->param_queue_lock, flags);
410 return found;
411 }
412
413 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
414 char *buf)
415 {
416 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
417 struct solos_card *card = atmdev->dev_data;
418 struct sk_buff *skb;
419
420 spin_lock(&card->cli_queue_lock);
421 skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
422 spin_unlock(&card->cli_queue_lock);
423 if(skb == NULL)
424 return sprintf(buf, "No data.\n");
425
426 memcpy(buf, skb->data, skb->len);
427 dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
428
429 kfree_skb(skb);
430 return skb->len;
431 }
432
433 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
434 {
435 struct sk_buff *skb;
436 struct pkt_hdr *header;
437
438 // dev_dbg(&card->dev->dev, "size: %d\n", size);
439
440 if (size > (BUF_SIZE - sizeof(*header))) {
441 dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
442 return 0;
443 }
444 skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
445 if (!skb) {
446 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
447 return 0;
448 }
449
450 header = (void *)skb_put(skb, sizeof(*header));
451
452 header->size = cpu_to_le16(size);
453 header->vpi = cpu_to_le16(0);
454 header->vci = cpu_to_le16(0);
455 header->type = cpu_to_le16(PKT_COMMAND);
456
457 memcpy(skb_put(skb, size), buf, size);
458
459 fpga_queue(card, dev, skb, NULL);
460
461 return 0;
462 }
463
464 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
465 const char *buf, size_t count)
466 {
467 struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
468 struct solos_card *card = atmdev->dev_data;
469 int err;
470
471 err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
472
473 return err?:count;
474 }
475
476 static DEVICE_ATTR(console, 0644, console_show, console_store);
477
478
479 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
480 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
481
482 #include "solos-attrlist.c"
483
484 #undef SOLOS_ATTR_RO
485 #undef SOLOS_ATTR_RW
486
487 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
488 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
489
490 static struct attribute *solos_attrs[] = {
491 #include "solos-attrlist.c"
492 NULL
493 };
494
495 static struct attribute_group solos_attr_group = {
496 .attrs = solos_attrs,
497 .name = "parameters",
498 };
499
500 static int flash_upgrade(struct solos_card *card, int chip)
501 {
502 const struct firmware *fw;
503 const char *fw_name;
504 uint32_t data32 = 0;
505 int blocksize = 0;
506 int numblocks = 0;
507 int offset;
508
509 if (chip == 0) {
510 fw_name = "solos-FPGA.bin";
511 blocksize = FPGA_BLOCK;
512 } else {
513 fw_name = "solos-Firmware.bin";
514 blocksize = SOLOS_BLOCK;
515 }
516
517 if (request_firmware(&fw, fw_name, &card->dev->dev))
518 return -ENOENT;
519
520 dev_info(&card->dev->dev, "Flash upgrade starting\n");
521
522 numblocks = fw->size / blocksize;
523 dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
524 dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
525
526 dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
527 iowrite32(1, card->config_regs + FPGA_MODE);
528 data32 = ioread32(card->config_regs + FPGA_MODE);
529
530 /* Set mode to Chip Erase */
531 dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
532 chip?"Solos":"FPGA");
533 iowrite32((chip * 2), card->config_regs + FLASH_MODE);
534
535
536 iowrite32(1, card->config_regs + WRITE_FLASH);
537 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
538
539 for (offset = 0; offset < fw->size; offset += blocksize) {
540 int i;
541
542 /* Clear write flag */
543 iowrite32(0, card->config_regs + WRITE_FLASH);
544
545 /* Set mode to Block Write */
546 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
547 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
548
549 /* Copy block to buffer, swapping each 16 bits */
550 for(i = 0; i < blocksize; i += 4) {
551 uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
552 iowrite32(word, RX_BUF(card, 3) + i);
553 }
554
555 /* Specify block number and then trigger flash write */
556 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
557 iowrite32(1, card->config_regs + WRITE_FLASH);
558 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
559 }
560
561 release_firmware(fw);
562 iowrite32(0, card->config_regs + WRITE_FLASH);
563 iowrite32(0, card->config_regs + FPGA_MODE);
564 iowrite32(0, card->config_regs + FLASH_MODE);
565 dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
566 return 0;
567 }
568
569 static irqreturn_t solos_irq(int irq, void *dev_id)
570 {
571 struct solos_card *card = dev_id;
572 int handled = 1;
573
574 //ACK IRQ
575 iowrite32(0, card->config_regs + IRQ_CLEAR);
576 //Disable IRQs from FPGA
577 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
578
579 if (card->atmdev[0])
580 tasklet_schedule(&card->tlet);
581 else
582 wake_up(&card->fw_wq);
583
584 //Enable IRQs from FPGA
585 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
586 return IRQ_RETVAL(handled);
587 }
588
589 void solos_bh(unsigned long card_arg)
590 {
591 struct solos_card *card = (void *)card_arg;
592 int port;
593 uint32_t card_flags;
594 uint32_t rx_done = 0;
595
596 card_flags = ioread32(card->config_regs + FLAGS_ADDR);
597
598 /* The TX bits are set if the channel is busy; clear if not. We want to
599 invoke fpga_tx() unless _all_ the bits for active channels are set */
600 if ((card_flags & card->tx_mask) != card->tx_mask)
601 fpga_tx(card);
602
603 for (port = 0; port < card->nr_ports; port++) {
604 if (card_flags & (0x10 << port)) {
605 struct pkt_hdr _hdr, *header;
606 struct sk_buff *skb;
607 struct atm_vcc *vcc;
608 int size;
609
610 if (card->using_dma) {
611 skb = card->rx_skb[port];
612 card->rx_skb[port] = NULL;
613
614 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
615 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
616
617 header = (void *)skb->data;
618 size = le16_to_cpu(header->size);
619 skb_put(skb, size + sizeof(*header));
620 skb_pull(skb, sizeof(*header));
621 } else {
622 header = &_hdr;
623
624 rx_done |= 0x10 << port;
625
626 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
627
628 size = le16_to_cpu(header->size);
629
630 skb = alloc_skb(size + 1, GFP_ATOMIC);
631 if (!skb) {
632 if (net_ratelimit())
633 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
634 continue;
635 }
636
637 memcpy_fromio(skb_put(skb, size),
638 RX_BUF(card, port) + sizeof(*header),
639 size);
640 }
641 if (atmdebug) {
642 dev_info(&card->dev->dev, "Received: device %d\n", port);
643 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
644 size, le16_to_cpu(header->vpi),
645 le16_to_cpu(header->vci));
646 print_buffer(skb);
647 }
648
649 switch (le16_to_cpu(header->type)) {
650 case PKT_DATA:
651 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
652 le16_to_cpu(header->vci));
653 if (!vcc) {
654 if (net_ratelimit())
655 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
656 le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
657 port);
658 continue;
659 }
660 atm_charge(vcc, skb->truesize);
661 vcc->push(vcc, skb);
662 atomic_inc(&vcc->stats->rx);
663 break;
664
665 case PKT_STATUS:
666 process_status(card, port, skb);
667 dev_kfree_skb_any(skb);
668 break;
669
670 case PKT_COMMAND:
671 default: /* FIXME: Not really, surely? */
672 if (process_command(card, port, skb))
673 break;
674 spin_lock(&card->cli_queue_lock);
675 if (skb_queue_len(&card->cli_queue[port]) > 10) {
676 if (net_ratelimit())
677 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
678 port);
679 dev_kfree_skb_any(skb);
680 } else
681 skb_queue_tail(&card->cli_queue[port], skb);
682 spin_unlock(&card->cli_queue_lock);
683 break;
684 }
685 }
686 /* Allocate RX skbs for any ports which need them */
687 if (card->using_dma && card->atmdev[port] &&
688 !card->rx_skb[port]) {
689 struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
690 if (skb) {
691 SKB_CB(skb)->dma_addr =
692 pci_map_single(card->dev, skb->data,
693 RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
694 iowrite32(SKB_CB(skb)->dma_addr,
695 card->config_regs + RX_DMA_ADDR(port));
696 card->rx_skb[port] = skb;
697 } else {
698 if (net_ratelimit())
699 dev_warn(&card->dev->dev, "Failed to allocate RX skb");
700
701 /* We'll have to try again later */
702 tasklet_schedule(&card->tlet);
703 }
704 }
705 }
706 if (rx_done)
707 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
708
709 return;
710 }
711
712 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
713 {
714 struct hlist_head *head;
715 struct atm_vcc *vcc = NULL;
716 struct hlist_node *node;
717 struct sock *s;
718
719 read_lock(&vcc_sklist_lock);
720 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
721 sk_for_each(s, node, head) {
722 vcc = atm_sk(s);
723 if (vcc->dev == dev && vcc->vci == vci &&
724 vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
725 goto out;
726 }
727 vcc = NULL;
728 out:
729 read_unlock(&vcc_sklist_lock);
730 return vcc;
731 }
732
733 static int list_vccs(int vci)
734 {
735 struct hlist_head *head;
736 struct atm_vcc *vcc;
737 struct hlist_node *node;
738 struct sock *s;
739 int num_found = 0;
740 int i;
741
742 read_lock(&vcc_sklist_lock);
743 if (vci != 0){
744 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
745 sk_for_each(s, node, head) {
746 num_found ++;
747 vcc = atm_sk(s);
748 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
749 vcc->dev->number,
750 vcc->vpi,
751 vcc->vci);
752 }
753 } else {
754 for(i = 0; i < VCC_HTABLE_SIZE; i++){
755 head = &vcc_hash[i];
756 sk_for_each(s, node, head) {
757 num_found ++;
758 vcc = atm_sk(s);
759 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
760 vcc->dev->number,
761 vcc->vpi,
762 vcc->vci);
763 }
764 }
765 }
766 read_unlock(&vcc_sklist_lock);
767 return num_found;
768 }
769
770 static void release_vccs(struct atm_dev *dev)
771 {
772 int i;
773
774 write_lock_irq(&vcc_sklist_lock);
775 for (i = 0; i < VCC_HTABLE_SIZE; i++) {
776 struct hlist_head *head = &vcc_hash[i];
777 struct hlist_node *node, *tmp;
778 struct sock *s;
779 struct atm_vcc *vcc;
780
781 sk_for_each_safe(s, node, tmp, head) {
782 vcc = atm_sk(s);
783 if (vcc->dev == dev) {
784 vcc_release_async(vcc, -EPIPE);
785 sk_del_node_init(s);
786 }
787 }
788 }
789 write_unlock_irq(&vcc_sklist_lock);
790 }
791
792
793 static int popen(struct atm_vcc *vcc)
794 {
795 struct solos_card *card = vcc->dev->dev_data;
796 struct sk_buff *skb;
797 struct pkt_hdr *header;
798
799 if (vcc->qos.aal != ATM_AAL5) {
800 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
801 vcc->qos.aal);
802 return -EINVAL;
803 }
804
805 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
806 if (!skb && net_ratelimit()) {
807 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
808 return -ENOMEM;
809 }
810 header = (void *)skb_put(skb, sizeof(*header));
811
812 header->size = cpu_to_le16(0);
813 header->vpi = cpu_to_le16(vcc->vpi);
814 header->vci = cpu_to_le16(vcc->vci);
815 header->type = cpu_to_le16(PKT_POPEN);
816
817 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
818
819 // dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
820 set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
821 set_bit(ATM_VF_READY, &vcc->flags);
822 list_vccs(0);
823
824
825 return 0;
826 }
827
828 static void pclose(struct atm_vcc *vcc)
829 {
830 struct solos_card *card = vcc->dev->dev_data;
831 struct sk_buff *skb;
832 struct pkt_hdr *header;
833
834 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
835 if (!skb) {
836 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
837 return;
838 }
839 header = (void *)skb_put(skb, sizeof(*header));
840
841 header->size = cpu_to_le16(0);
842 header->vpi = cpu_to_le16(vcc->vpi);
843 header->vci = cpu_to_le16(vcc->vci);
844 header->type = cpu_to_le16(PKT_PCLOSE);
845
846 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
847
848 // dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
849
850 clear_bit(ATM_VF_ADDR, &vcc->flags);
851 clear_bit(ATM_VF_READY, &vcc->flags);
852
853 return;
854 }
855
856 static int print_buffer(struct sk_buff *buf)
857 {
858 int len,i;
859 char msg[500];
860 char item[10];
861
862 len = buf->len;
863 for (i = 0; i < len; i++){
864 if(i % 8 == 0)
865 sprintf(msg, "%02X: ", i);
866
867 sprintf(item,"%02X ",*(buf->data + i));
868 strcat(msg, item);
869 if(i % 8 == 7) {
870 sprintf(item, "\n");
871 strcat(msg, item);
872 printk(KERN_DEBUG "%s", msg);
873 }
874 }
875 if (i % 8 != 0) {
876 sprintf(item, "\n");
877 strcat(msg, item);
878 printk(KERN_DEBUG "%s", msg);
879 }
880 printk(KERN_DEBUG "\n");
881
882 return 0;
883 }
884
885 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
886 struct atm_vcc *vcc)
887 {
888 int old_len;
889 unsigned long flags;
890
891 SKB_CB(skb)->vcc = vcc;
892
893 spin_lock_irqsave(&card->tx_queue_lock, flags);
894 old_len = skb_queue_len(&card->tx_queue[port]);
895 skb_queue_tail(&card->tx_queue[port], skb);
896 if (!old_len) {
897 card->tx_mask |= (1 << port);
898 }
899 spin_unlock_irqrestore(&card->tx_queue_lock, flags);
900
901 /* Theoretically we could just schedule the tasklet here, but
902 that introduces latency we don't want -- it's noticeable */
903 if (!old_len)
904 fpga_tx(card);
905 }
906
907 static int fpga_tx(struct solos_card *card)
908 {
909 uint32_t tx_pending;
910 uint32_t tx_started = 0;
911 struct sk_buff *skb;
912 struct atm_vcc *vcc;
913 unsigned char port;
914 unsigned long flags;
915
916 spin_lock_irqsave(&card->tx_lock, flags);
917
918 tx_pending = ioread32(card->config_regs + FLAGS_ADDR) & card->tx_mask;
919
920 dev_vdbg(&card->dev->dev, "TX Flags are %X\n", tx_pending);
921
922 for (port = 0; port < card->nr_ports; port++) {
923 if (card->atmdev[port] && !(tx_pending & (1 << port))) {
924 struct sk_buff *oldskb = card->tx_skb[port];
925
926 if (oldskb)
927 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
928 oldskb->len, PCI_DMA_TODEVICE);
929
930 spin_lock(&card->tx_queue_lock);
931 skb = skb_dequeue(&card->tx_queue[port]);
932 if (!skb)
933 card->tx_mask &= ~(1 << port);
934 spin_unlock(&card->tx_queue_lock);
935
936 if (skb && !card->using_dma) {
937 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
938 tx_started |= 1 << port; //Set TX full flag
939 oldskb = skb; /* We're done with this skb already */
940 } else if (skb && card->using_dma) {
941 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
942 skb->len, PCI_DMA_TODEVICE);
943 iowrite32(SKB_CB(skb)->dma_addr,
944 card->config_regs + TX_DMA_ADDR(port));
945 }
946
947 if (!oldskb)
948 continue;
949
950 /* Clean up and free oldskb now it's gone */
951 if (atmdebug) {
952 dev_info(&card->dev->dev, "Transmitted: port %d\n",
953 port);
954 print_buffer(oldskb);
955 }
956
957 vcc = SKB_CB(oldskb)->vcc;
958
959 if (vcc) {
960 atomic_inc(&vcc->stats->tx);
961 solos_pop(vcc, oldskb);
962 } else
963 dev_kfree_skb_irq(oldskb);
964
965 }
966 }
967 if (tx_started)
968 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
969
970 spin_unlock_irqrestore(&card->tx_lock, flags);
971 return 0;
972 }
973
974 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
975 {
976 struct solos_card *card = vcc->dev->dev_data;
977 struct sk_buff *skb2 = NULL;
978 struct pkt_hdr *header;
979 int pktlen;
980
981 //dev_dbg(&card->dev->dev, "psend called.\n");
982 //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
983
984 if (debug) {
985 skb2 = atm_alloc_charge(vcc, skb->len, GFP_ATOMIC);
986 if (skb2) {
987 memcpy(skb2->data, skb->data, skb->len);
988 skb_put(skb2, skb->len);
989 vcc->push(vcc, skb2);
990 atomic_inc(&vcc->stats->rx);
991 }
992 atomic_inc(&vcc->stats->tx);
993 solos_pop(vcc, skb);
994 return 0;
995 }
996
997 pktlen = skb->len;
998 if (pktlen > (BUF_SIZE - sizeof(*header))) {
999 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1000 solos_pop(vcc, skb);
1001 return 0;
1002 }
1003
1004 if (!skb_clone_writable(skb, sizeof(*header))) {
1005 int expand_by = 0;
1006 int ret;
1007
1008 if (skb_headroom(skb) < sizeof(*header))
1009 expand_by = sizeof(*header) - skb_headroom(skb);
1010
1011 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1012 if (ret) {
1013 dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1014 solos_pop(vcc, skb);
1015 return ret;
1016 }
1017 }
1018
1019 header = (void *)skb_push(skb, sizeof(*header));
1020
1021 /* This does _not_ include the size of the header */
1022 header->size = cpu_to_le16(pktlen);
1023 header->vpi = cpu_to_le16(vcc->vpi);
1024 header->vci = cpu_to_le16(vcc->vci);
1025 header->type = cpu_to_le16(PKT_DATA);
1026
1027 fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1028
1029 return 0;
1030 }
1031
1032 static struct atmdev_ops fpga_ops = {
1033 .open = popen,
1034 .close = pclose,
1035 .ioctl = NULL,
1036 .getsockopt = NULL,
1037 .setsockopt = NULL,
1038 .send = psend,
1039 .send_oam = NULL,
1040 .phy_put = NULL,
1041 .phy_get = NULL,
1042 .change_qos = NULL,
1043 .proc_read = NULL,
1044 .owner = THIS_MODULE
1045 };
1046
1047 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1048 {
1049 int err, i;
1050 uint16_t fpga_ver;
1051 uint8_t major_ver, minor_ver;
1052 uint32_t data32;
1053 struct solos_card *card;
1054
1055 if (debug)
1056 return 0;
1057
1058 card = kzalloc(sizeof(*card), GFP_KERNEL);
1059 if (!card)
1060 return -ENOMEM;
1061
1062 card->dev = dev;
1063 init_waitqueue_head(&card->fw_wq);
1064 init_waitqueue_head(&card->param_wq);
1065
1066 err = pci_enable_device(dev);
1067 if (err) {
1068 dev_warn(&dev->dev, "Failed to enable PCI device\n");
1069 goto out;
1070 }
1071
1072 err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1073 if (err) {
1074 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1075 goto out;
1076 }
1077
1078 err = pci_request_regions(dev, "solos");
1079 if (err) {
1080 dev_warn(&dev->dev, "Failed to request regions\n");
1081 goto out;
1082 }
1083
1084 card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1085 if (!card->config_regs) {
1086 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1087 goto out_release_regions;
1088 }
1089 card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1090 if (!card->buffers) {
1091 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1092 goto out_unmap_config;
1093 }
1094
1095 // for(i=0;i<64 ;i+=4){
1096 // data32=ioread32(card->buffers + i);
1097 // dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1098 // }
1099
1100 //Fill Config Mem with zeros
1101 for(i = 0; i < 128; i += 4)
1102 iowrite32(0, card->config_regs + i);
1103
1104 //Set RX empty flags
1105 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1106
1107 data32 = ioread32(card->config_regs + FPGA_VER);
1108 fpga_ver = (data32 & 0x0000FFFF);
1109 major_ver = ((data32 & 0xFF000000) >> 24);
1110 minor_ver = ((data32 & 0x00FF0000) >> 16);
1111 dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1112 major_ver, minor_ver, fpga_ver);
1113
1114 if (fpga_ver > 27)
1115 card->using_dma = 1;
1116
1117 card->nr_ports = 2; /* FIXME: Detect daughterboard */
1118
1119 pci_set_drvdata(dev, card);
1120
1121 tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1122 spin_lock_init(&card->tx_lock);
1123 spin_lock_init(&card->tx_queue_lock);
1124 spin_lock_init(&card->cli_queue_lock);
1125 spin_lock_init(&card->param_queue_lock);
1126 INIT_LIST_HEAD(&card->param_queue);
1127
1128 /*
1129 // Set Loopback mode
1130 data32 = 0x00010000;
1131 iowrite32(data32,card->config_regs + FLAGS_ADDR);
1132 */
1133 /*
1134 // Fill Buffers with zeros
1135 for (i = 0; i < BUF_SIZE * 8; i += 4)
1136 iowrite32(0, card->buffers + i);
1137 */
1138 /*
1139 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1140 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1141 for(i = 0; i < (BUF_SIZE * 1); i += 4)
1142 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1143
1144 // Read Config Memory
1145 printk(KERN_DEBUG "Reading Config MEM\n");
1146 i = 0;
1147 for(i = 0; i < 16; i++) {
1148 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1149 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1150 (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1151 (unsigned long)data32);
1152 }
1153 */
1154 //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1155 err = request_irq(dev->irq, solos_irq, IRQF_DISABLED|IRQF_SHARED,
1156 "solos-pci", card);
1157 if (err) {
1158 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1159 goto out_unmap_both;
1160 }
1161
1162 // Enable IRQs
1163 iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1164
1165 if (fpga_upgrade)
1166 flash_upgrade(card, 0);
1167
1168 if (firmware_upgrade)
1169 flash_upgrade(card, 1);
1170
1171 err = atm_init(card);
1172 if (err)
1173 goto out_free_irq;
1174
1175 return 0;
1176
1177 out_free_irq:
1178 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1179 free_irq(dev->irq, card);
1180 tasklet_kill(&card->tlet);
1181
1182 out_unmap_both:
1183 pci_set_drvdata(dev, NULL);
1184 pci_iounmap(dev, card->config_regs);
1185 out_unmap_config:
1186 pci_iounmap(dev, card->buffers);
1187 out_release_regions:
1188 pci_release_regions(dev);
1189 out:
1190 return err;
1191 }
1192
1193 static int atm_init(struct solos_card *card)
1194 {
1195 int i;
1196
1197 for (i = 0; i < card->nr_ports; i++) {
1198 struct sk_buff *skb;
1199 struct pkt_hdr *header;
1200
1201 skb_queue_head_init(&card->tx_queue[i]);
1202 skb_queue_head_init(&card->cli_queue[i]);
1203
1204 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1205 if (!card->atmdev[i]) {
1206 dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1207 atm_remove(card);
1208 return -ENODEV;
1209 }
1210 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1211 dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1212 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1213 dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1214
1215 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1216
1217 card->atmdev[i]->ci_range.vpi_bits = 8;
1218 card->atmdev[i]->ci_range.vci_bits = 16;
1219 card->atmdev[i]->dev_data = card;
1220 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1221 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1222
1223 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1224 if (!skb) {
1225 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1226 continue;
1227 }
1228
1229 header = (void *)skb_put(skb, sizeof(*header));
1230
1231 header->size = cpu_to_le16(0);
1232 header->vpi = cpu_to_le16(0);
1233 header->vci = cpu_to_le16(0);
1234 header->type = cpu_to_le16(PKT_STATUS);
1235
1236 fpga_queue(card, i, skb, NULL);
1237 }
1238 return 0;
1239 }
1240
1241 static void atm_remove(struct solos_card *card)
1242 {
1243 int i;
1244
1245 for (i = 0; i < card->nr_ports; i++) {
1246 if (card->atmdev[i]) {
1247 dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1248
1249 sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1250 atm_dev_deregister(card->atmdev[i]);
1251 }
1252 }
1253 }
1254
1255 static void fpga_remove(struct pci_dev *dev)
1256 {
1257 struct solos_card *card = pci_get_drvdata(dev);
1258
1259 if (debug)
1260 return;
1261
1262 atm_remove(card);
1263
1264 dev_vdbg(&dev->dev, "Freeing IRQ\n");
1265 // Disable IRQs from FPGA
1266 iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1267 free_irq(dev->irq, card);
1268 tasklet_kill(&card->tlet);
1269
1270 // iowrite32(0x01,pciregs);
1271 dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1272 pci_iounmap(dev, card->buffers);
1273 pci_iounmap(dev, card->config_regs);
1274
1275 dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1276 pci_release_regions(dev);
1277 pci_disable_device(dev);
1278
1279 pci_set_drvdata(dev, NULL);
1280 kfree(card);
1281 // dev_dbg(&card->dev->dev, "fpga_remove\n");
1282 return;
1283 }
1284
1285 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1286 { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1287 { 0, }
1288 };
1289
1290 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1291
1292 static struct pci_driver fpga_driver = {
1293 .name = "solos",
1294 .id_table = fpga_pci_tbl,
1295 .probe = fpga_probe,
1296 .remove = fpga_remove,
1297 };
1298
1299
1300 static int __init solos_pci_init(void)
1301 {
1302 printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1303 return pci_register_driver(&fpga_driver);
1304 }
1305
1306 static void __exit solos_pci_exit(void)
1307 {
1308 pci_unregister_driver(&fpga_driver);
1309 printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1310 }
1311
1312 module_init(solos_pci_init);
1313 module_exit(solos_pci_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree