1 /*
2 *
3 * Copyright (C) 2002 Intersil Americas Inc.
4 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
5 * Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <linux/version.h>
23 #include <linux/module.h>
24
25 #include <linux/netdevice.h>
26 #include <linux/pci.h>
27 #include <linux/etherdevice.h>
28 #include <linux/delay.h>
29 #include <linux/if_arp.h>
30
31 #include <asm/io.h>
32
33 #include "prismcompat.h"
34 #include "isl_38xx.h"
35 #include "isl_ioctl.h"
36 #include "islpci_dev.h"
37 #include "islpci_mgt.h"
38 #include "islpci_eth.h"
39 #include "oid_mgt.h"
40
41 #define ISL3877_IMAGE_FILE "isl3877"
42 #define ISL3886_IMAGE_FILE "isl3886"
43 #define ISL3890_IMAGE_FILE "isl3890"
44
45 static int prism54_bring_down(islpci_private *);
46 static int islpci_alloc_memory(islpci_private *);
47
48 /* Temporary dummy MAC address to use until firmware is loaded.
49 * The idea there is that some tools (such as nameif) may query
50 * the MAC address before the netdev is 'open'. By using a valid
51 * OUI prefix, they can process the netdev properly.
52 * Of course, this is not the final/real MAC address. It doesn't
53 * matter, as you are suppose to be able to change it anytime via
54 * ndev->set_mac_address. Jean II */
55 const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
56
57 static int
isl_upload_firmware(islpci_private * priv)58 isl_upload_firmware(islpci_private *priv)
59 {
60 u32 reg, rc;
61 void __iomem *device_base = priv->device_base;
62
63 /* clear the RAMBoot and the Reset bit */
64 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
65 reg &= ~ISL38XX_CTRL_STAT_RESET;
66 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
67 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
68 wmb();
69 udelay(ISL38XX_WRITEIO_DELAY);
70
71 /* set the Reset bit without reading the register ! */
72 reg |= ISL38XX_CTRL_STAT_RESET;
73 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
74 wmb();
75 udelay(ISL38XX_WRITEIO_DELAY);
76
77 /* clear the Reset bit */
78 reg &= ~ISL38XX_CTRL_STAT_RESET;
79 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
80 wmb();
81
82 /* wait a while for the device to reboot */
83 mdelay(50);
84
85 {
86 const struct firmware *fw_entry = NULL;
87 long fw_len;
88 const u32 *fw_ptr;
89
90 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
91 if (rc) {
92 printk(KERN_ERR
93 "%s: request_firmware() failed for '%s'\n",
94 "prism54", priv->firmware);
95 return rc;
96 }
97 /* prepare the Direct Memory Base register */
98 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
99
100 fw_ptr = (u32 *) fw_entry->data;
101 fw_len = fw_entry->size;
102
103 if (fw_len % 4) {
104 printk(KERN_ERR
105 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
106 "prism54", priv->firmware);
107 release_firmware(fw_entry);
108 return -EILSEQ; /* Illegal byte sequence */;
109 }
110
111 while (fw_len > 0) {
112 long _fw_len =
113 (fw_len >
114 ISL38XX_MEMORY_WINDOW_SIZE) ?
115 ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
116 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
117
118 /* set the cards base address for writting the data */
119 isl38xx_w32_flush(device_base, reg,
120 ISL38XX_DIR_MEM_BASE_REG);
121 wmb(); /* be paranoid */
122
123 /* increment the write address for next iteration */
124 reg += _fw_len;
125 fw_len -= _fw_len;
126
127 /* write the data to the Direct Memory Window 32bit-wise */
128 /* memcpy_toio() doesn't guarantee 32bit writes :-| */
129 while (_fw_len > 0) {
130 /* use non-swapping writel() */
131 __raw_writel(*fw_ptr, dev_fw_ptr);
132 fw_ptr++, dev_fw_ptr++;
133 _fw_len -= 4;
134 }
135
136 /* flush PCI posting */
137 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
138 wmb(); /* be paranoid again */
139
140 BUG_ON(_fw_len != 0);
141 }
142
143 BUG_ON(fw_len != 0);
144
145 /* Firmware version is at offset 40 (also for "newmac") */
146 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
147 priv->ndev->name, fw_entry->data + 40);
148
149 release_firmware(fw_entry);
150 }
151
152 /* now reset the device
153 * clear the Reset & ClkRun bit, set the RAMBoot bit */
154 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
155 reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
156 reg &= ~ISL38XX_CTRL_STAT_RESET;
157 reg |= ISL38XX_CTRL_STAT_RAMBOOT;
158 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
159 wmb();
160 udelay(ISL38XX_WRITEIO_DELAY);
161
162 /* set the reset bit latches the host override and RAMBoot bits
163 * into the device for operation when the reset bit is reset */
164 reg |= ISL38XX_CTRL_STAT_RESET;
165 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
166 /* don't do flush PCI posting here! */
167 wmb();
168 udelay(ISL38XX_WRITEIO_DELAY);
169
170 /* clear the reset bit should start the whole circus */
171 reg &= ~ISL38XX_CTRL_STAT_RESET;
172 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
173 /* don't do flush PCI posting here! */
174 wmb();
175 udelay(ISL38XX_WRITEIO_DELAY);
176
177 return 0;
178 }
179
180 /******************************************************************************
181 Device Interrupt Handler
182 ******************************************************************************/
183
184 irqreturn_t
islpci_interrupt(int irq,void * config,struct pt_regs * regs)185 islpci_interrupt(int irq, void *config, struct pt_regs *regs)
186 {
187 u32 reg;
188 islpci_private *priv = config;
189 struct net_device *ndev = priv->ndev;
190 void __iomem *device = priv->device_base;
191 int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
192
193 /* lock the interrupt handler */
194 spin_lock(&priv->slock);
195
196 /* received an interrupt request on a shared IRQ line
197 * first check whether the device is in sleep mode */
198 reg = readl(device + ISL38XX_CTRL_STAT_REG);
199 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
200 /* device is in sleep mode, IRQ was generated by someone else */
201 {
202 #if VERBOSE > SHOW_ERROR_MESSAGES
203 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
204 #endif
205 spin_unlock(&priv->slock);
206 return IRQ_NONE;
207 }
208
209
210 /* check whether there is any source of interrupt on the device */
211 reg = readl(device + ISL38XX_INT_IDENT_REG);
212
213 /* also check the contents of the Interrupt Enable Register, because this
214 * will filter out interrupt sources from other devices on the same irq ! */
215 reg &= readl(device + ISL38XX_INT_EN_REG);
216 reg &= ISL38XX_INT_SOURCES;
217
218 if (reg != 0) {
219 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
220 powerstate = ISL38XX_PSM_ACTIVE_STATE;
221
222 /* reset the request bits in the Identification register */
223 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
224
225 #if VERBOSE > SHOW_ERROR_MESSAGES
226 DEBUG(SHOW_FUNCTION_CALLS,
227 "IRQ: Identification register 0x%p 0x%x \n", device, reg);
228 #endif
229
230 /* check for each bit in the register separately */
231 if (reg & ISL38XX_INT_IDENT_UPDATE) {
232 #if VERBOSE > SHOW_ERROR_MESSAGES
233 /* Queue has been updated */
234 DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
235
236 DEBUG(SHOW_QUEUE_INDEXES,
237 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
238 le32_to_cpu(priv->control_block->
239 driver_curr_frag[0]),
240 le32_to_cpu(priv->control_block->
241 driver_curr_frag[1]),
242 le32_to_cpu(priv->control_block->
243 driver_curr_frag[2]),
244 le32_to_cpu(priv->control_block->
245 driver_curr_frag[3]),
246 le32_to_cpu(priv->control_block->
247 driver_curr_frag[4]),
248 le32_to_cpu(priv->control_block->
249 driver_curr_frag[5])
250 );
251
252 DEBUG(SHOW_QUEUE_INDEXES,
253 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
254 le32_to_cpu(priv->control_block->
255 device_curr_frag[0]),
256 le32_to_cpu(priv->control_block->
257 device_curr_frag[1]),
258 le32_to_cpu(priv->control_block->
259 device_curr_frag[2]),
260 le32_to_cpu(priv->control_block->
261 device_curr_frag[3]),
262 le32_to_cpu(priv->control_block->
263 device_curr_frag[4]),
264 le32_to_cpu(priv->control_block->
265 device_curr_frag[5])
266 );
267 #endif
268
269 /* cleanup the data low transmit queue */
270 islpci_eth_cleanup_transmit(priv, priv->control_block);
271
272 /* device is in active state, update the
273 * powerstate flag if necessary */
274 powerstate = ISL38XX_PSM_ACTIVE_STATE;
275
276 /* check all three queues in priority order
277 * call the PIMFOR receive function until the
278 * queue is empty */
279 if (isl38xx_in_queue(priv->control_block,
280 ISL38XX_CB_RX_MGMTQ) != 0) {
281 #if VERBOSE > SHOW_ERROR_MESSAGES
282 DEBUG(SHOW_TRACING,
283 "Received frame in Management Queue\n");
284 #endif
285 islpci_mgt_receive(ndev);
286
287 islpci_mgt_cleanup_transmit(ndev);
288
289 /* Refill slots in receive queue */
290 islpci_mgmt_rx_fill(ndev);
291
292 /* no need to trigger the device, next
293 islpci_mgt_transaction does it */
294 }
295
296 while (isl38xx_in_queue(priv->control_block,
297 ISL38XX_CB_RX_DATA_LQ) != 0) {
298 #if VERBOSE > SHOW_ERROR_MESSAGES
299 DEBUG(SHOW_TRACING,
300 "Received frame in Data Low Queue \n");
301 #endif
302 islpci_eth_receive(priv);
303 }
304
305 /* check whether the data transmit queues were full */
306 if (priv->data_low_tx_full) {
307 /* check whether the transmit is not full anymore */
308 if (ISL38XX_CB_TX_QSIZE -
309 isl38xx_in_queue(priv->control_block,
310 ISL38XX_CB_TX_DATA_LQ) >=
311 ISL38XX_MIN_QTHRESHOLD) {
312 /* nope, the driver is ready for more network frames */
313 netif_wake_queue(priv->ndev);
314
315 /* reset the full flag */
316 priv->data_low_tx_full = 0;
317 }
318 }
319 }
320
321 if (reg & ISL38XX_INT_IDENT_INIT) {
322 /* Device has been initialized */
323 #if VERBOSE > SHOW_ERROR_MESSAGES
324 DEBUG(SHOW_TRACING,
325 "IRQ: Init flag, device initialized \n");
326 #endif
327 wake_up(&priv->reset_done);
328 }
329
330 if (reg & ISL38XX_INT_IDENT_SLEEP) {
331 /* Device intends to move to powersave state */
332 #if VERBOSE > SHOW_ERROR_MESSAGES
333 DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
334 #endif
335 isl38xx_handle_sleep_request(priv->control_block,
336 &powerstate,
337 priv->device_base);
338 }
339
340 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
341 /* Device has been woken up to active state */
342 #if VERBOSE > SHOW_ERROR_MESSAGES
343 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
344 #endif
345
346 isl38xx_handle_wakeup(priv->control_block,
347 &powerstate, priv->device_base);
348 }
349 } else {
350 #if VERBOSE > SHOW_ERROR_MESSAGES
351 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
352 #endif
353 spin_unlock(&priv->slock);
354 return IRQ_NONE;
355 }
356
357 /* sleep -> ready */
358 if (islpci_get_state(priv) == PRV_STATE_SLEEP
359 && powerstate == ISL38XX_PSM_ACTIVE_STATE)
360 islpci_set_state(priv, PRV_STATE_READY);
361
362 /* !sleep -> sleep */
363 if (islpci_get_state(priv) != PRV_STATE_SLEEP
364 && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
365 islpci_set_state(priv, PRV_STATE_SLEEP);
366
367 /* unlock the interrupt handler */
368 spin_unlock(&priv->slock);
369
370 return IRQ_HANDLED;
371 }
372
373 /******************************************************************************
374 Network Interface Control & Statistical functions
375 ******************************************************************************/
376 static int
islpci_open(struct net_device * ndev)377 islpci_open(struct net_device *ndev)
378 {
379 u32 rc;
380 islpci_private *priv = netdev_priv(ndev);
381
382 /* reset data structures, upload firmware and reset device */
383 rc = islpci_reset(priv,1);
384 if (rc) {
385 prism54_bring_down(priv);
386 return rc; /* Returns informative message */
387 }
388
389 netif_start_queue(ndev);
390 /* netif_mark_up( ndev ); */
391
392 return 0;
393 }
394
395 static int
islpci_close(struct net_device * ndev)396 islpci_close(struct net_device *ndev)
397 {
398 islpci_private *priv = netdev_priv(ndev);
399
400 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
401
402 netif_stop_queue(ndev);
403
404 return prism54_bring_down(priv);
405 }
406
407 static int
prism54_bring_down(islpci_private * priv)408 prism54_bring_down(islpci_private *priv)
409 {
410 void __iomem *device_base = priv->device_base;
411 u32 reg;
412 /* we are going to shutdown the device */
413 islpci_set_state(priv, PRV_STATE_PREBOOT);
414
415 /* disable all device interrupts in case they weren't */
416 isl38xx_disable_interrupts(priv->device_base);
417
418 /* For safety reasons, we may want to ensure that no DMA transfer is
419 * currently in progress by emptying the TX and RX queues. */
420
421 /* wait until interrupts have finished executing on other CPUs */
422 prism54_synchronize_irq(priv->pdev->irq);
423
424 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
425 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
426 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
427 wmb();
428 udelay(ISL38XX_WRITEIO_DELAY);
429
430 reg |= ISL38XX_CTRL_STAT_RESET;
431 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
432 wmb();
433 udelay(ISL38XX_WRITEIO_DELAY);
434
435 /* clear the Reset bit */
436 reg &= ~ISL38XX_CTRL_STAT_RESET;
437 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
438 wmb();
439
440 /* wait a while for the device to reset */
441 set_current_state(TASK_UNINTERRUPTIBLE);
442 schedule_timeout(50*HZ/1000);
443
444 return 0;
445 }
446
447 static int
islpci_upload_fw(islpci_private * priv)448 islpci_upload_fw(islpci_private *priv)
449 {
450 islpci_state_t old_state;
451 u32 rc;
452
453 old_state = islpci_set_state(priv, PRV_STATE_BOOT);
454
455 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
456
457 rc = isl_upload_firmware(priv);
458 if (rc) {
459 /* error uploading the firmware */
460 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
461 priv->ndev->name, priv->firmware);
462
463 islpci_set_state(priv, old_state);
464 return rc;
465 }
466
467 printk(KERN_DEBUG "%s: firmware upload complete\n",
468 priv->ndev->name);
469
470 islpci_set_state(priv, PRV_STATE_POSTBOOT);
471
472 return 0;
473 }
474
475 static int
islpci_reset_if(islpci_private * priv)476 islpci_reset_if(islpci_private *priv)
477 {
478 long remaining;
479 int result = -ETIME;
480 int count;
481
482 DEFINE_WAIT(wait);
483 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
484
485 /* now the last step is to reset the interface */
486 isl38xx_interface_reset(priv->device_base, priv->device_host_address);
487 islpci_set_state(priv, PRV_STATE_PREINIT);
488
489 for(count = 0; count < 2 && result; count++) {
490 /* The software reset acknowledge needs about 220 msec here.
491 * Be conservative and wait for up to one second. */
492
493 set_current_state(TASK_UNINTERRUPTIBLE);
494 remaining = schedule_timeout(HZ);
495
496 if(remaining > 0) {
497 result = 0;
498 break;
499 }
500
501 /* If we're here it's because our IRQ hasn't yet gone through.
502 * Retry a bit more...
503 */
504 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
505 priv->ndev->name);
506 }
507
508 finish_wait(&priv->reset_done, &wait);
509
510 if (result) {
511 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
512 return result;
513 }
514
515 islpci_set_state(priv, PRV_STATE_INIT);
516
517 /* Now that the device is 100% up, let's allow
518 * for the other interrupts --
519 * NOTE: this is not *yet* true since we've only allowed the
520 * INIT interrupt on the IRQ line. We can perhaps poll
521 * the IRQ line until we know for sure the reset went through */
522 isl38xx_enable_common_interrupts(priv->device_base);
523
524 down_write(&priv->mib_sem);
525 result = mgt_commit(priv);
526 if (result) {
527 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
528 up_write(&priv->mib_sem);
529 return result;
530 }
531 up_write(&priv->mib_sem);
532
533 islpci_set_state(priv, PRV_STATE_READY);
534
535 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
536 return 0;
537 }
538
539 int
islpci_reset(islpci_private * priv,int reload_firmware)540 islpci_reset(islpci_private *priv, int reload_firmware)
541 {
542 isl38xx_control_block *cb = /* volatile not needed */
543 (isl38xx_control_block *) priv->control_block;
544 unsigned counter;
545 int rc;
546
547 if (reload_firmware)
548 islpci_set_state(priv, PRV_STATE_PREBOOT);
549 else
550 islpci_set_state(priv, PRV_STATE_POSTBOOT);
551
552 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
553
554 /* disable all device interrupts in case they weren't */
555 isl38xx_disable_interrupts(priv->device_base);
556
557 /* flush all management queues */
558 priv->index_mgmt_tx = 0;
559 priv->index_mgmt_rx = 0;
560
561 /* clear the indexes in the frame pointer */
562 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
563 cb->driver_curr_frag[counter] = cpu_to_le32(0);
564 cb->device_curr_frag[counter] = cpu_to_le32(0);
565 }
566
567 /* reset the mgmt receive queue */
568 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
569 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
570 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
571 frag->flags = 0;
572 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
573 }
574
575 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
576 cb->rx_data_low[counter].address =
577 cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
578 }
579
580 /* since the receive queues are filled with empty fragments, now we can
581 * set the corresponding indexes in the Control Block */
582 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
583 cpu_to_le32(ISL38XX_CB_RX_QSIZE);
584 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
585 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
586
587 /* reset the remaining real index registers and full flags */
588 priv->free_data_rx = 0;
589 priv->free_data_tx = 0;
590 priv->data_low_tx_full = 0;
591
592 if (reload_firmware) { /* Should we load the firmware ? */
593 /* now that the data structures are cleaned up, upload
594 * firmware and reset interface */
595 rc = islpci_upload_fw(priv);
596 if (rc) {
597 printk(KERN_ERR "%s: islpci_reset: failure\n",
598 priv->ndev->name);
599 return rc;
600 }
601 }
602
603 /* finally reset interface */
604 rc = islpci_reset_if(priv);
605 if (rc)
606 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
607 return rc;
608 }
609
610 struct net_device_stats *
islpci_statistics(struct net_device * ndev)611 islpci_statistics(struct net_device *ndev)
612 {
613 islpci_private *priv = netdev_priv(ndev);
614
615 #if VERBOSE > SHOW_ERROR_MESSAGES
616 DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n");
617 #endif
618
619 return &priv->statistics;
620 }
621
622 /******************************************************************************
623 Network device configuration functions
624 ******************************************************************************/
625 static int
islpci_alloc_memory(islpci_private * priv)626 islpci_alloc_memory(islpci_private *priv)
627 {
628 int counter;
629
630 #if VERBOSE > SHOW_ERROR_MESSAGES
631 printk(KERN_DEBUG "islpci_alloc_memory\n");
632 #endif
633
634 /* remap the PCI device base address to accessable */
635 if (!(priv->device_base =
636 ioremap(pci_resource_start(priv->pdev, 0),
637 ISL38XX_PCI_MEM_SIZE))) {
638 /* error in remapping the PCI device memory address range */
639 printk(KERN_ERR "PCI memory remapping failed \n");
640 return -1;
641 }
642
643 /* memory layout for consistent DMA region:
644 *
645 * Area 1: Control Block for the device interface
646 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
647 * the number of supported stations in the AP determines the minimal
648 * size of the buffer !
649 */
650
651 /* perform the allocation */
652 priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
653 HOST_MEM_BLOCK,
654 &priv->
655 device_host_address);
656
657 if (!priv->driver_mem_address) {
658 /* error allocating the block of PCI memory */
659 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
660 "prism54");
661 return -1;
662 }
663
664 /* assign the Control Block to the first address of the allocated area */
665 priv->control_block =
666 (isl38xx_control_block *) priv->driver_mem_address;
667
668 /* set the Power Save Buffer pointer directly behind the CB */
669 priv->device_psm_buffer =
670 priv->device_host_address + CONTROL_BLOCK_SIZE;
671
672 /* make sure all buffer pointers are initialized */
673 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
674 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
675 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
676 }
677
678 priv->index_mgmt_rx = 0;
679 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
680 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
681
682 /* allocate rx queue for management frames */
683 if (islpci_mgmt_rx_fill(priv->ndev) < 0)
684 goto out_free;
685
686 /* now get the data rx skb's */
687 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
688 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
689
690 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
691 struct sk_buff *skb;
692
693 /* allocate an sk_buff for received data frames storage
694 * each frame on receive size consists of 1 fragment
695 * include any required allignment operations */
696 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
697 /* error allocating an sk_buff structure elements */
698 printk(KERN_ERR "Error allocating skb.\n");
699 skb = NULL;
700 goto out_free;
701 }
702 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
703 /* add the new allocated sk_buff to the buffer array */
704 priv->data_low_rx[counter] = skb;
705
706 /* map the allocated skb data area to pci */
707 priv->pci_map_rx_address[counter] =
708 pci_map_single(priv->pdev, (void *) skb->data,
709 MAX_FRAGMENT_SIZE_RX + 2,
710 PCI_DMA_FROMDEVICE);
711 if (!priv->pci_map_rx_address[counter]) {
712 /* error mapping the buffer to device
713 accessable memory address */
714 printk(KERN_ERR "failed to map skb DMA'able\n");
715 goto out_free;
716 }
717 }
718
719 prism54_acl_init(&priv->acl);
720 prism54_wpa_ie_init(priv);
721 if (mgt_init(priv))
722 goto out_free;
723
724 return 0;
725 out_free:
726 islpci_free_memory(priv);
727 return -1;
728 }
729
730 int
islpci_free_memory(islpci_private * priv)731 islpci_free_memory(islpci_private *priv)
732 {
733 int counter;
734
735 if (priv->device_base)
736 iounmap(priv->device_base);
737 priv->device_base = NULL;
738
739 /* free consistent DMA area... */
740 if (priv->driver_mem_address)
741 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
742 priv->driver_mem_address,
743 priv->device_host_address);
744
745 /* clear some dangling pointers */
746 priv->driver_mem_address = NULL;
747 priv->device_host_address = 0;
748 priv->device_psm_buffer = 0;
749 priv->control_block = NULL;
750
751 /* clean up mgmt rx buffers */
752 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
753 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
754 if (buf->pci_addr)
755 pci_unmap_single(priv->pdev, buf->pci_addr,
756 buf->size, PCI_DMA_FROMDEVICE);
757 buf->pci_addr = 0;
758 if (buf->mem)
759 kfree(buf->mem);
760 buf->size = 0;
761 buf->mem = NULL;
762 }
763
764 /* clean up data rx buffers */
765 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
766 if (priv->pci_map_rx_address[counter])
767 pci_unmap_single(priv->pdev,
768 priv->pci_map_rx_address[counter],
769 MAX_FRAGMENT_SIZE_RX + 2,
770 PCI_DMA_FROMDEVICE);
771 priv->pci_map_rx_address[counter] = 0;
772
773 if (priv->data_low_rx[counter])
774 dev_kfree_skb(priv->data_low_rx[counter]);
775 priv->data_low_rx[counter] = NULL;
776 }
777
778 /* Free the acces control list and the WPA list */
779 prism54_acl_clean(&priv->acl);
780 prism54_wpa_ie_clean(priv);
781 mgt_clean(priv);
782
783 return 0;
784 }
785
786 #if 0
787 static void
788 islpci_set_multicast_list(struct net_device *dev)
789 {
790 /* put device into promisc mode and let network layer handle it */
791 }
792 #endif
793
794 struct net_device *
islpci_setup(struct pci_dev * pdev)795 islpci_setup(struct pci_dev *pdev)
796 {
797 islpci_private *priv;
798 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
799
800 if (!ndev)
801 return ndev;
802
803 SET_MODULE_OWNER(ndev);
804 pci_set_drvdata(pdev, ndev);
805 #if defined(SET_NETDEV_DEV)
806 SET_NETDEV_DEV(ndev, &pdev->dev);
807 #endif
808
809 /* setup the structure members */
810 ndev->base_addr = pci_resource_start(pdev, 0);
811 ndev->irq = pdev->irq;
812
813 /* initialize the function pointers */
814 ndev->open = &islpci_open;
815 ndev->stop = &islpci_close;
816 ndev->get_stats = &islpci_statistics;
817 ndev->get_wireless_stats = &prism54_get_wireless_stats;
818 ndev->do_ioctl = &prism54_ioctl;
819 ndev->wireless_handlers =
820 (struct iw_handler_def *) &prism54_handler_def;
821
822 ndev->hard_start_xmit = &islpci_eth_transmit;
823 /* ndev->set_multicast_list = &islpci_set_multicast_list; */
824 ndev->addr_len = ETH_ALEN;
825 ndev->set_mac_address = &prism54_set_mac_address;
826 /* Get a non-zero dummy MAC address for nameif. Jean II */
827 memcpy(ndev->dev_addr, dummy_mac, 6);
828
829 #ifdef HAVE_TX_TIMEOUT
830 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
831 ndev->tx_timeout = &islpci_eth_tx_timeout;
832 #endif
833
834 /* allocate a private device structure to the network device */
835 priv = netdev_priv(ndev);
836 priv->ndev = ndev;
837 priv->pdev = pdev;
838 priv->monitor_type = ARPHRD_IEEE80211;
839 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
840 priv->monitor_type : ARPHRD_ETHER;
841
842 #if WIRELESS_EXT > 16
843 /* Add pointers to enable iwspy support. */
844 priv->wireless_data.spy_data = &priv->spy_data;
845 ndev->wireless_data = &priv->wireless_data;
846 #endif /* WIRELESS_EXT > 16 */
847
848 /* save the start and end address of the PCI memory area */
849 ndev->mem_start = (unsigned long) priv->device_base;
850 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
851
852 #if VERBOSE > SHOW_ERROR_MESSAGES
853 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
854 #endif
855
856 init_waitqueue_head(&priv->reset_done);
857
858 /* init the queue read locks, process wait counter */
859 sema_init(&priv->mgmt_sem, 1);
860 priv->mgmt_received = NULL;
861 init_waitqueue_head(&priv->mgmt_wqueue);
862 sema_init(&priv->stats_sem, 1);
863 spin_lock_init(&priv->slock);
864
865 /* init state machine with off#1 state */
866 priv->state = PRV_STATE_OFF;
867 priv->state_off = 1;
868
869 /* initialize workqueue's */
870 INIT_WORK(&priv->stats_work,
871 (void (*)(void *)) prism54_update_stats, priv);
872 priv->stats_timestamp = 0;
873
874 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake, priv);
875 priv->reset_task_pending = 0;
876
877 /* allocate various memory areas */
878 if (islpci_alloc_memory(priv))
879 goto do_free_netdev;
880
881 /* select the firmware file depending on the device id */
882 switch (pdev->device) {
883 case 0x3877:
884 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
885 break;
886
887 case 0x3886:
888 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
889 break;
890
891 default:
892 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
893 break;
894 }
895
896 if (register_netdev(ndev)) {
897 DEBUG(SHOW_ERROR_MESSAGES,
898 "ERROR: register_netdev() failed \n");
899 goto do_islpci_free_memory;
900 }
901
902 return ndev;
903
904 do_islpci_free_memory:
905 islpci_free_memory(priv);
906 do_free_netdev:
907 pci_set_drvdata(pdev, NULL);
908 free_netdev(ndev);
909 priv = NULL;
910 return NULL;
911 }
912
913 islpci_state_t
islpci_set_state(islpci_private * priv,islpci_state_t new_state)914 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
915 {
916 islpci_state_t old_state;
917
918 /* lock */
919 old_state = priv->state;
920
921 /* this means either a race condition or some serious error in
922 * the driver code */
923 switch (new_state) {
924 case PRV_STATE_OFF:
925 priv->state_off++;
926 default:
927 priv->state = new_state;
928 break;
929
930 case PRV_STATE_PREBOOT:
931 /* there are actually many off-states, enumerated by
932 * state_off */
933 if (old_state == PRV_STATE_OFF)
934 priv->state_off--;
935
936 /* only if hw_unavailable is zero now it means we either
937 * were in off#1 state, or came here from
938 * somewhere else */
939 if (!priv->state_off)
940 priv->state = new_state;
941 break;
942 };
943 #if 0
944 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
945 priv->ndev->name, old_state, new_state, priv->state_off);
946 #endif
947
948 /* invariants */
949 BUG_ON(priv->state_off < 0);
950 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
951 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
952
953 /* unlock */
954 return old_state;
955 }
956