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Last change on this file since 969585f was 969585f, checked in by Vojtech Horky <vojtechhorky@…>, 14 years ago
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1	/*
2	* Copyright (c) 2010 Lenka Trochtova
3	* Copyright (c) 2011 Jiri Svoboda
4	* All rights reserved.
5	*
6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions
8	* are met:
9	*
10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.
17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/
29
30	/**
31	* @defgroup pciintel pci bus driver for intel method 1.
32	* @brief HelenOS root pci bus driver for intel method 1.
33	* @{
34	*/
35
36	/** @file
37	*/
38
39	#include <assert.h>
40	#include <stdio.h>
41	#include <errno.h>
42	#include <bool.h>
43	#include <fibril_synch.h>
44	#include <str.h>
45	#include <ctype.h>
46	#include <macros.h>
47	#include <str_error.h>
48
49	#include <ddf/driver.h>
50	#include <ddf/log.h>
51	#include <devman.h>
52	#include <ipc/devman.h>
53	#include <ipc/dev_iface.h>
54	#include <ipc/irc.h>
55	#include <ipc/ns.h>
56	#include <ipc/services.h>
57	#include <sysinfo.h>
58	#include <ops/hw_res.h>
59	#include <device/hw_res.h>
60	#include <ddi.h>
61	#include <libarch/ddi.h>
62	#include <pci_dev_iface.h>
63
64	#include "pci.h"
65
66	#define NAME "pciintel"
67
68	#define CONF_ADDR(bus, dev, fn, reg) \
69	((1 << 31) \| (bus << 16) \| (dev << 11) \| (fn << 8) \| (reg & ~3))
70
71	/** Obtain PCI function soft-state from DDF function node */
72	#define PCI_FUN(fnode) ((pci_fun_t *) (fnode)->driver_data)
73
74	/** Obtain PCI bus soft-state from DDF device node */
75	#define PCI_BUS(dnode) ((pci_bus_t *) (dnode)->driver_data)
76
77	/** Obtain PCI bus soft-state from function soft-state */
78	#define PCI_BUS_FROM_FUN(fun) ((fun)->busptr)
79
80	static hw_resource_list_t pciintel_get_resources(ddf_fun_t fnode)
81	{
82	pci_fun_t *fun = PCI_FUN(fnode);
83
84	if (fun == NULL)
85	return NULL;
86	return &fun->hw_resources;
87	}
88
89	static bool pciintel_enable_interrupt(ddf_fun_t *fnode)
90	{
91	/* This is an old ugly way, copied from ne2000 driver */
92	assert(fnode);
93	pci_fun_t dev_data = (pci_fun_t ) fnode->driver_data;
94
95	sysarg_t apic;
96	sysarg_t i8259;
97
98	int irc_phone = ENOTSUP;
99
100	if (((sysinfo_get_value("apic", &apic) == EOK) && (apic))
101	\|\| ((sysinfo_get_value("i8259", &i8259) == EOK) && (i8259))) {
102	irc_phone = service_connect_blocking(SERVICE_IRC, 0, 0);
103	}
104
105	if (irc_phone < 0) {
106	return false;
107	}
108
109	size_t i;
110	for (i = 0; i < dev_data->hw_resources.count; i++) {
111	if (dev_data->hw_resources.resources[i].type == INTERRUPT) {
112	int irq = dev_data->hw_resources.resources[i].res.interrupt.irq;
113	int rc = async_req_1_0(irc_phone, IRC_ENABLE_INTERRUPT, irq);
114	if (rc != EOK) {
115	async_hangup(irc_phone);
116	return false;
117	}
118	}
119	}
120
121	async_hangup(irc_phone);
122	return true;
123	}
124
125	static int pci_config_space_write_32(
126	ddf_fun_t *fun, uint32_t address, uint32_t data)
127	{
128	if (address > 252)
129	return EINVAL;
130	pci_conf_write_32(PCI_FUN(fun), address, data);
131	return EOK;
132	}
133
134	static int pci_config_space_write_16(
135	ddf_fun_t *fun, uint32_t address, uint16_t data)
136	{
137	if (address > 254)
138	return EINVAL;
139	pci_conf_write_16(PCI_FUN(fun), address, data);
140	return EOK;
141	}
142
143	static int pci_config_space_write_8(
144	ddf_fun_t *fun, uint32_t address, uint8_t data)
145	{
146	if (address > 255)
147	return EINVAL;
148	pci_conf_write_8(PCI_FUN(fun), address, data);
149	return EOK;
150	}
151
152	static int pci_config_space_read_32(
153	ddf_fun_t fun, uint32_t address, uint32_t data)
154	{
155	if (address > 252)
156	return EINVAL;
157	*data = pci_conf_read_32(PCI_FUN(fun), address);
158	return EOK;
159	}
160
161	static int pci_config_space_read_16(
162	ddf_fun_t fun, uint32_t address, uint16_t data)
163	{
164	if (address > 254)
165	return EINVAL;
166	*data = pci_conf_read_16(PCI_FUN(fun), address);
167	return EOK;
168	}
169
170	static int pci_config_space_read_8(
171	ddf_fun_t fun, uint32_t address, uint8_t data)
172	{
173	if (address > 255)
174	return EINVAL;
175	*data = pci_conf_read_8(PCI_FUN(fun), address);
176	return EOK;
177	}
178
179	static hw_res_ops_t pciintel_hw_res_ops = {
180	&pciintel_get_resources,
181	&pciintel_enable_interrupt
182	};
183
184	static pci_dev_iface_t pci_dev_ops = {
185	.config_space_read_8 = &pci_config_space_read_8,
186	.config_space_read_16 = &pci_config_space_read_16,
187	.config_space_read_32 = &pci_config_space_read_32,
188	.config_space_write_8 = &pci_config_space_write_8,
189	.config_space_write_16 = &pci_config_space_write_16,
190	.config_space_write_32 = &pci_config_space_write_32
191	};
192
193	static ddf_dev_ops_t pci_fun_ops = {
194	.interfaces[HW_RES_DEV_IFACE] = &pciintel_hw_res_ops,
195	.interfaces[PCI_DEV_IFACE] = &pci_dev_ops
196	};
197
198	static int pci_add_device(ddf_dev_t *);
199
200	/** PCI bus driver standard operations */
201	static driver_ops_t pci_ops = {
202	.add_device = &pci_add_device
203	};
204
205	/** PCI bus driver structure */
206	static driver_t pci_driver = {
207	.name = NAME,
208	.driver_ops = &pci_ops
209	};
210
211	static pci_bus_t *pci_bus_new(void)
212	{
213	pci_bus_t *bus;
214
215	bus = (pci_bus_t *) calloc(1, sizeof(pci_bus_t));
216	if (bus == NULL)
217	return NULL;
218
219	fibril_mutex_initialize(&bus->conf_mutex);
220	return bus;
221	}
222
223	static void pci_bus_delete(pci_bus_t *bus)
224	{
225	assert(bus != NULL);
226	free(bus);
227	}
228
229	static void pci_conf_read(pci_fun_t fun, int reg, uint8_t buf, size_t len)
230	{
231	pci_bus_t *bus = PCI_BUS_FROM_FUN(fun);
232
233	fibril_mutex_lock(&bus->conf_mutex);
234
235	uint32_t conf_addr;
236	conf_addr = CONF_ADDR(fun->bus, fun->dev, fun->fn, reg);
237	void *addr = bus->conf_data_port + (reg & 3);
238
239	pio_write_32(bus->conf_addr_port, conf_addr);
240
241	switch (len) {
242	case 1:
243	buf[0] = pio_read_8(addr);
244	break;
245	case 2:
246	((uint16_t *) buf)[0] = pio_read_16(addr);
247	break;
248	case 4:
249	((uint32_t *) buf)[0] = pio_read_32(addr);
250	break;
251	}
252
253	fibril_mutex_unlock(&bus->conf_mutex);
254	}
255
256	static void pci_conf_write(pci_fun_t fun, int reg, uint8_t buf, size_t len)
257	{
258	pci_bus_t *bus = PCI_BUS_FROM_FUN(fun);
259
260	fibril_mutex_lock(&bus->conf_mutex);
261
262	uint32_t conf_addr;
263	conf_addr = CONF_ADDR(fun->bus, fun->dev, fun->fn, reg);
264	void *addr = bus->conf_data_port + (reg & 3);
265
266	pio_write_32(bus->conf_addr_port, conf_addr);
267
268	switch (len) {
269	case 1:
270	pio_write_8(addr, buf[0]);
271	break;
272	case 2:
273	pio_write_16(addr, ((uint16_t *) buf)[0]);
274	break;
275	case 4:
276	pio_write_32(addr, ((uint32_t *) buf)[0]);
277	break;
278	}
279
280	fibril_mutex_unlock(&bus->conf_mutex);
281	}
282
283	uint8_t pci_conf_read_8(pci_fun_t *fun, int reg)
284	{
285	uint8_t res;
286	pci_conf_read(fun, reg, &res, 1);
287	return res;
288	}
289
290	uint16_t pci_conf_read_16(pci_fun_t *fun, int reg)
291	{
292	uint16_t res;
293	pci_conf_read(fun, reg, (uint8_t *) &res, 2);
294	return res;
295	}
296
297	uint32_t pci_conf_read_32(pci_fun_t *fun, int reg)
298	{
299	uint32_t res;
300	pci_conf_read(fun, reg, (uint8_t *) &res, 4);
301	return res;
302	}
303
304	void pci_conf_write_8(pci_fun_t *fun, int reg, uint8_t val)
305	{
306	pci_conf_write(fun, reg, (uint8_t *) &val, 1);
307	}
308
309	void pci_conf_write_16(pci_fun_t *fun, int reg, uint16_t val)
310	{
311	pci_conf_write(fun, reg, (uint8_t *) &val, 2);
312	}
313
314	void pci_conf_write_32(pci_fun_t *fun, int reg, uint32_t val)
315	{
316	pci_conf_write(fun, reg, (uint8_t *) &val, 4);
317	}
318
319	void pci_fun_create_match_ids(pci_fun_t *fun)
320	{
321	char *match_id_str;
322	int rc;
323
324	asprintf(&match_id_str, "pci/ven=%04x&dev=%04x",
325	fun->vendor_id, fun->device_id);
326
327	if (match_id_str == NULL) {
328	ddf_msg(LVL_ERROR, "Out of memory creating match ID.");
329	return;
330	}
331
332	rc = ddf_fun_add_match_id(fun->fnode, match_id_str, 90);
333	if (rc != EOK) {
334	ddf_msg(LVL_ERROR, "Failed adding match ID: %s",
335	str_error(rc));
336	}
337
338	/* TODO add more ids (with subsys ids, using class id etc.) */
339	}
340
341	void pci_add_range(pci_fun_t *fun, uint64_t range_addr, size_t range_size,
342	bool io)
343	{
344	hw_resource_list_t *hw_res_list = &fun->hw_resources;
345	hw_resource_t *hw_resources = hw_res_list->resources;
346	size_t count = hw_res_list->count;
347
348	assert(hw_resources != NULL);
349	assert(count < PCI_MAX_HW_RES);
350
351	if (io) {
352	hw_resources[count].type = IO_RANGE;
353	hw_resources[count].res.io_range.address = range_addr;
354	hw_resources[count].res.io_range.size = range_size;
355	hw_resources[count].res.io_range.endianness = LITTLE_ENDIAN;
356	} else {
357	hw_resources[count].type = MEM_RANGE;
358	hw_resources[count].res.mem_range.address = range_addr;
359	hw_resources[count].res.mem_range.size = range_size;
360	hw_resources[count].res.mem_range.endianness = LITTLE_ENDIAN;
361	}
362
363	hw_res_list->count++;
364	}
365
366	/** Read the base address register (BAR) of the device and if it contains valid
367	* address add it to the devices hw resource list.
368	*
369	* @param fun PCI function
370	* @param addr The address of the BAR in the PCI configuration address space of
371	* the device
372	* @return The addr the address of the BAR which should be read next
373	*/
374	int pci_read_bar(pci_fun_t *fun, int addr)
375	{
376	/* Value of the BAR */
377	uint32_t val, mask;
378	/* IO space address */
379	bool io;
380	/* 64-bit wide address */
381	bool addrw64;
382
383	/* Size of the io or memory range specified by the BAR */
384	size_t range_size;
385	/* Beginning of the io or memory range specified by the BAR */
386	uint64_t range_addr;
387
388	/* Get the value of the BAR. */
389	val = pci_conf_read_32(fun, addr);
390
391	#define IO_MASK (~0x3)
392	#define MEM_MASK (~0xf)
393
394	io = (bool) (val & 1);
395	if (io) {
396	addrw64 = false;
397	mask = IO_MASK;
398	} else {
399	mask = MEM_MASK;
400	switch ((val >> 1) & 3) {
401	case 0:
402	addrw64 = false;
403	break;
404	case 2:
405	addrw64 = true;
406	break;
407	default:
408	/* reserved, go to the next BAR */
409	return addr + 4;
410	}
411	}
412
413	/* Get the address mask. */
414	pci_conf_write_32(fun, addr, 0xffffffff);
415	mask &= pci_conf_read_32(fun, addr);
416
417	/* Restore the original value. */
418	pci_conf_write_32(fun, addr, val);
419	val = pci_conf_read_32(fun, addr);
420
421	range_size = pci_bar_mask_to_size(mask);
422
423	if (addrw64) {
424	range_addr = ((uint64_t)pci_conf_read_32(fun, addr + 4) << 32) \|
425	(val & 0xfffffff0);
426	} else {
427	range_addr = (val & 0xfffffff0);
428	}
429
430	if (range_addr != 0) {
431	ddf_msg(LVL_DEBUG, "Function %s : address = %" PRIx64
432	", size = %x", fun->fnode->name, range_addr,
433	(unsigned int) range_size);
434	}
435
436	pci_add_range(fun, range_addr, range_size, io);
437
438	if (addrw64)
439	return addr + 8;
440
441	return addr + 4;
442	}
443
444	void pci_add_interrupt(pci_fun_t *fun, int irq)
445	{
446	hw_resource_list_t *hw_res_list = &fun->hw_resources;
447	hw_resource_t *hw_resources = hw_res_list->resources;
448	size_t count = hw_res_list->count;
449
450	assert(NULL != hw_resources);
451	assert(count < PCI_MAX_HW_RES);
452
453	hw_resources[count].type = INTERRUPT;
454	hw_resources[count].res.interrupt.irq = irq;
455
456	hw_res_list->count++;
457
458	ddf_msg(LVL_NOTE, "Function %s uses irq %x.", fun->fnode->name, irq);
459	}
460
461	void pci_read_interrupt(pci_fun_t *fun)
462	{
463	uint8_t irq = pci_conf_read_8(fun, PCI_BRIDGE_INT_LINE);
464	if (irq != 0xff)
465	pci_add_interrupt(fun, irq);
466	}
467
468	/** Enumerate (recursively) and register the devices connected to a pci bus.
469	*
470	* @param bus Host-to-PCI bridge
471	* @param bus_num Bus number
472	*/
473	void pci_bus_scan(pci_bus_t *bus, int bus_num)
474	{
475	ddf_fun_t *fnode;
476	pci_fun_t *fun;
477
478	int child_bus = 0;
479	int dnum, fnum;
480	bool multi;
481	uint8_t header_type;
482
483	fun = pci_fun_new(bus);
484
485	for (dnum = 0; dnum < 32; dnum++) {
486	multi = true;
487	for (fnum = 0; multi && fnum < 8; fnum++) {
488	pci_fun_init(fun, bus_num, dnum, fnum);
489	fun->vendor_id = pci_conf_read_16(fun,
490	PCI_VENDOR_ID);
491	fun->device_id = pci_conf_read_16(fun,
492	PCI_DEVICE_ID);
493	if (fun->vendor_id == 0xffff) {
494	/*
495	* The device is not present, go on scanning the
496	* bus.
497	*/
498	if (fnum == 0)
499	break;
500	else
501	continue;
502	}
503
504	header_type = pci_conf_read_8(fun, PCI_HEADER_TYPE);
505	if (fnum == 0) {
506	/* Is the device multifunction? */
507	multi = header_type >> 7;
508	}
509	/* Clear the multifunction bit. */
510	header_type = header_type & 0x7F;
511
512	char *fun_name = pci_fun_create_name(fun);
513	if (fun_name == NULL) {
514	ddf_msg(LVL_ERROR, "Out of memory.");
515	return;
516	}
517
518	fnode = ddf_fun_create(bus->dnode, fun_inner, fun_name);
519	if (fnode == NULL) {
520	ddf_msg(LVL_ERROR, "Failed creating function.");
521	return;
522	}
523
524	free(fun_name);
525	fun->fnode = fnode;
526
527	pci_alloc_resource_list(fun);
528	pci_read_bars(fun);
529	pci_read_interrupt(fun);
530
531	fnode->ops = &pci_fun_ops;
532	fnode->driver_data = fun;
533
534	ddf_msg(LVL_DEBUG, "Adding new function %s.",
535	fnode->name);
536
537	pci_fun_create_match_ids(fun);
538
539	if (ddf_fun_bind(fnode) != EOK) {
540	pci_clean_resource_list(fun);
541	clean_match_ids(&fnode->match_ids);
542	free((char *) fnode->name);
543	fnode->name = NULL;
544	continue;
545	}
546
547	if (header_type == PCI_HEADER_TYPE_BRIDGE \|\|
548	header_type == PCI_HEADER_TYPE_CARDBUS) {
549	child_bus = pci_conf_read_8(fun,
550	PCI_BRIDGE_SEC_BUS_NUM);
551	ddf_msg(LVL_DEBUG, "Device is pci-to-pci "
552	"bridge, secondary bus number = %d.",
553	bus_num);
554	if (child_bus > bus_num)
555	pci_bus_scan(bus, child_bus);
556	}
557
558	fun = pci_fun_new(bus);
559	}
560	}
561
562	if (fun->vendor_id == 0xffff) {
563	/* Free the auxiliary function structure. */
564	pci_fun_delete(fun);
565	}
566	}
567
568	static int pci_add_device(ddf_dev_t *dnode)
569	{
570	pci_bus_t *bus = NULL;
571	ddf_fun_t *ctl = NULL;
572	bool got_res = false;
573	int rc;
574
575	ddf_msg(LVL_DEBUG, "pci_add_device");
576	dnode->parent_phone = -1;
577
578	bus = pci_bus_new();
579	if (bus == NULL) {
580	ddf_msg(LVL_ERROR, "pci_add_device allocation failed.");
581	rc = ENOMEM;
582	goto fail;
583	}
584	bus->dnode = dnode;
585	dnode->driver_data = bus;
586
587	dnode->parent_phone = devman_parent_device_connect(dnode->handle,
588	IPC_FLAG_BLOCKING);
589	if (dnode->parent_phone < 0) {
590	ddf_msg(LVL_ERROR, "pci_add_device failed to connect to the "
591	"parent's driver.");
592	rc = dnode->parent_phone;
593	goto fail;
594	}
595
596	hw_resource_list_t hw_resources;
597
598	rc = hw_res_get_resource_list(dnode->parent_phone, &hw_resources);
599	if (rc != EOK) {
600	ddf_msg(LVL_ERROR, "pci_add_device failed to get hw resources "
601	"for the device.");
602	goto fail;
603	}
604	got_res = true;
605
606	ddf_msg(LVL_DEBUG, "conf_addr = %" PRIx64 ".",
607	hw_resources.resources[0].res.io_range.address);
608
609	assert(hw_resources.count > 0);
610	assert(hw_resources.resources[0].type == IO_RANGE);
611	assert(hw_resources.resources[0].res.io_range.size == 8);
612
613	bus->conf_io_addr =
614	(uint32_t) hw_resources.resources[0].res.io_range.address;
615
616	if (pio_enable((void *)(uintptr_t)bus->conf_io_addr, 8,
617	&bus->conf_addr_port)) {
618	ddf_msg(LVL_ERROR, "Failed to enable configuration ports.");
619	rc = EADDRNOTAVAIL;
620	goto fail;
621	}
622	bus->conf_data_port = (char *) bus->conf_addr_port + 4;
623
624	/* Make the bus device more visible. It has no use yet. */
625	ddf_msg(LVL_DEBUG, "Adding a 'ctl' function");
626
627	ctl = ddf_fun_create(bus->dnode, fun_exposed, "ctl");
628	if (ctl == NULL) {
629	ddf_msg(LVL_ERROR, "Failed creating control function.");
630	rc = ENOMEM;
631	goto fail;
632	}
633
634	rc = ddf_fun_bind(ctl);
635	if (rc != EOK) {
636	ddf_msg(LVL_ERROR, "Failed binding control function.");
637	goto fail;
638	}
639
640	/* Enumerate functions. */
641	ddf_msg(LVL_DEBUG, "Scanning the bus");
642	pci_bus_scan(bus, 0);
643
644	hw_res_clean_resource_list(&hw_resources);
645
646	return EOK;
647
648	fail:
649	if (bus != NULL)
650	pci_bus_delete(bus);
651	if (dnode->parent_phone >= 0)
652	async_hangup(dnode->parent_phone);
653	if (got_res)
654	hw_res_clean_resource_list(&hw_resources);
655	if (ctl != NULL)
656	ddf_fun_destroy(ctl);
657
658	return rc;
659	}
660
661	static void pciintel_init(void)
662	{
663	ddf_log_init(NAME, LVL_ERROR);
664	pci_fun_ops.interfaces[HW_RES_DEV_IFACE] = &pciintel_hw_res_ops;
665	pci_fun_ops.interfaces[PCI_DEV_IFACE] = &pci_dev_ops;
666	}
667
668	pci_fun_t pci_fun_new(pci_bus_t bus)
669	{
670	pci_fun_t *fun;
671
672	fun = (pci_fun_t *) calloc(1, sizeof(pci_fun_t));
673	if (fun == NULL)
674	return NULL;
675
676	fun->busptr = bus;
677	return fun;
678	}
679
680	void pci_fun_init(pci_fun_t *fun, int bus, int dev, int fn)
681	{
682	fun->bus = bus;
683	fun->dev = dev;
684	fun->fn = fn;
685	}
686
687	void pci_fun_delete(pci_fun_t *fun)
688	{
689	assert(fun != NULL);
690	hw_res_clean_resource_list(&fun->hw_resources);
691	free(fun);
692	}
693
694	char pci_fun_create_name(pci_fun_t fun)
695	{
696	char *name = NULL;
697
698	asprintf(&name, "%02x:%02x.%01x", fun->bus, fun->dev,
699	fun->fn);
700	return name;
701	}
702
703	bool pci_alloc_resource_list(pci_fun_t *fun)
704	{
705	fun->hw_resources.resources =
706	(hw_resource_t ) malloc(PCI_MAX_HW_RES sizeof(hw_resource_t));
707	return fun->hw_resources.resources != NULL;
708	}
709
710	void pci_clean_resource_list(pci_fun_t *fun)
711	{
712	if (fun->hw_resources.resources != NULL) {
713	free(fun->hw_resources.resources);
714	fun->hw_resources.resources = NULL;
715	}
716	}
717
718	/** Read the base address registers (BARs) of the function and add the addresses
719	* to its HW resource list.
720	*
721	* @param fun PCI function
722	*/
723	void pci_read_bars(pci_fun_t *fun)
724	{
725	/*
726	* Position of the BAR in the PCI configuration address space of the
727	* device.
728	*/
729	int addr = PCI_BASE_ADDR_0;
730
731	while (addr <= PCI_BASE_ADDR_5)
732	addr = pci_read_bar(fun, addr);
733	}
734
735	size_t pci_bar_mask_to_size(uint32_t mask)
736	{
737	size_t size = mask & ~(mask - 1);
738	return size;
739	}
740
741	int main(int argc, char *argv[])
742	{
743	printf(NAME ": HelenOS PCI bus driver (Intel method 1).\n");
744	pciintel_init();
745	return ddf_driver_main(&pci_driver);
746	}
747
748	/**
749	* @}
750	*/

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