VBoxPci-linux.c@ 45300

Last change on this file since 45300 was 45300, checked in by vboxsync, 12 years ago
Linux: more CONFIG_UIDGID_STRICT_TYPE_CHECKS fixes
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File size: 28.1 KB

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1	/* $Id: VBoxPci-linux.c 45300 2013-04-03 09:48:39Z vboxsync $ */
2	/** @file
3	* VBoxPci - PCI Driver (Host), Linux Specific Code.
4	*/
5
6	/*
7	* Copyright (C) 2011 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/*******************************************************************************
19	* Header Files *
20	*******************************************************************************/
21	#include "the-linux-kernel.h"
22	#include "version-generated.h"
23	#include "product-generated.h"
24
25	#define LOG_GROUP LOG_GROUP_DEV_PCI_RAW
26	#include <VBox/log.h>
27	#include <VBox/err.h>
28	#include <iprt/process.h>
29	#include <iprt/initterm.h>
30	#include <iprt/string.h>
31	#include <iprt/mem.h>
32
33	#include "VBoxPciInternal.h"
34
35	#ifdef VBOX_WITH_IOMMU
36	# include <linux/dmar.h>
37	# include <linux/intel-iommu.h>
38	# include <linux/pci.h>
39	# if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0) && \
40	(LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 41) \|\| LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0))
41	# include <asm/amd_iommu.h>
42	# else
43	# include <linux/amd-iommu.h>
44	# endif
45	# if LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
46	# define IOMMU_PRESENT() iommu_found()
47	# define IOMMU_DOMAIN_ALLOC() iommu_domain_alloc()
48	# else
49	# define IOMMU_PRESENT() iommu_present(&pci_bus_type)
50	# define IOMMU_DOMAIN_ALLOC() iommu_domain_alloc(&pci_bus_type)
51	# endif
52	#endif /* VBOX_WITH_IOMMU */
53
54
55	/*******************************************************************************
56	* Internal Functions *
57	*******************************************************************************/
58	static int VBoxPciLinuxInit(void);
59	static void VBoxPciLinuxUnload(void);
60
61	/*******************************************************************************
62	* Global Variables *
63	*******************************************************************************/
64	static VBOXRAWPCIGLOBALS g_VBoxPciGlobals;
65
66	module_init(VBoxPciLinuxInit);
67	module_exit(VBoxPciLinuxUnload);
68
69	MODULE_AUTHOR(VBOX_VENDOR);
70	MODULE_DESCRIPTION(VBOX_PRODUCT " PCI access Driver");
71	MODULE_LICENSE("GPL");
72	#ifdef MODULE_VERSION
73	MODULE_VERSION(VBOX_VERSION_STRING);
74	#endif
75
76
77	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
78	# define PCI_DEV_GET(v,d,p) pci_get_device(v,d,p)
79	# define PCI_DEV_PUT(x) pci_dev_put(x)
80	# define PCI_DEV_GET_SLOT(bus, devfn) pci_get_bus_and_slot(bus, devfn)
81	#else
82	# define PCI_DEV_GET(v,d,p) pci_find_device(v,d,p)
83	# define PCI_DEV_PUT(x) do {} while(0)
84	# define PCI_DEV_GET_SLOT(bus, devfn) pci_find_slot(bus, devfn)
85	#endif
86
87	/**
88	* Name of module used to attach to the host PCI device, when
89	* PCI device passthrough is used.
90	*/
91	#define PCI_STUB_MODULE "pci-stub"
92	/* For some reasons my kernel names module for find_module() this way,
93	* while device name seems to be above one.
94	*/
95	#define PCI_STUB_MODULE_NAME "pci_stub"
96
97	/**
98	* Our driver name.
99	*/
100	#define DRIVER_NAME "vboxpci"
101
102	/**
103	* Initialize module.
104	*
105	* @returns appropriate status code.
106	*/
107	static int __init VBoxPciLinuxInit(void)
108	{
109	int rc;
110	/*
111	* Initialize IPRT.
112	*/
113	rc = RTR0Init(0);
114
115	if (RT_FAILURE(rc))
116	goto error;
117
118
119	LogRel(("VBoxPciLinuxInit\n"));
120
121	RT_ZERO(g_VBoxPciGlobals);
122
123	rc = vboxPciInit(&g_VBoxPciGlobals);
124	if (RT_FAILURE(rc))
125	{
126	LogRel(("cannot do VBoxPciInit: %Rc\n", rc));
127	goto error;
128	}
129
130	#if defined(CONFIG_PCI_STUB)
131	/* nothing to do, pci_stub module part of the kernel */
132	g_VBoxPciGlobals.fPciStubModuleAvail = true;
133
134	#elif defined(CONFIG_PCI_STUB_MODULE)
135	if (request_module(PCI_STUB_MODULE) == 0)
136	{
137	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
138	/* find_module() is static before Linux 2.6.30 */
139	g_VBoxPciGlobals.pciStubModule = find_module(PCI_STUB_MODULE_NAME);
140	if (g_VBoxPciGlobals.pciStubModule)
141	{
142	if (try_module_get(g_VBoxPciGlobals.pciStubModule))
143	g_VBoxPciGlobals.fPciStubModuleAvail = true;
144	}
145	else
146	printk(KERN_INFO "vboxpci: find_module %s failed\n", PCI_STUB_MODULE);
147	# endif
148	}
149	else
150	printk(KERN_INFO "vboxpci: cannot load %s\n", PCI_STUB_MODULE);
151
152	#else
153	printk(KERN_INFO "vboxpci: %s module not available, cannot detach PCI devices\n",
154	PCI_STUB_MODULE);
155	#endif
156
157	#ifdef VBOX_WITH_IOMMU
158	if (IOMMU_PRESENT())
159	printk(KERN_INFO "vboxpci: IOMMU found\n");
160	else
161	printk(KERN_INFO "vboxpci: IOMMU not found (not registered)\n");
162	#else
163	printk(KERN_INFO "vboxpci: IOMMU not found (not compiled)\n");
164	#endif
165
166	return 0;
167
168	error:
169	return -RTErrConvertToErrno(rc);
170	}
171
172	/**
173	* Unload the module.
174	*/
175	static void __exit VBoxPciLinuxUnload(void)
176	{
177	LogRel(("VBoxPciLinuxLinuxUnload\n"));
178
179	/*
180	* Undo the work done during start (in reverse order).
181	*/
182	vboxPciShutdown(&g_VBoxPciGlobals);
183
184	RTR0Term();
185
186	if (g_VBoxPciGlobals.pciStubModule)
187	{
188	module_put(g_VBoxPciGlobals.pciStubModule);
189	g_VBoxPciGlobals.pciStubModule = NULL;
190	}
191
192	Log(("VBoxPciLinuxUnload - done\n"));
193	}
194
195	int vboxPciOsDevRegisterWithIommu(PVBOXRAWPCIINS pIns)
196	{
197	#ifdef VBOX_WITH_IOMMU
198	int rc;
199	int status;
200	PVBOXRAWPCIDRVVM pData = VBOX_DRV_VMDATA(pIns);
201
202	if (!pData)
203	{
204	printk(KERN_DEBUG "vboxpci: VM data not initialized (attach)\n");
205	return VERR_INVALID_PARAMETER;
206	}
207
208	if (!pData->pIommuDomain)
209	{
210	printk(KERN_DEBUG "vboxpci: No IOMMU domain (attach)\n");
211	return VERR_NOT_FOUND;
212	}
213
214	status = iommu_attach_device(pData->pIommuDomain, &pIns->pPciDev->dev);
215	if (status == 0)
216	{
217	printk(KERN_DEBUG "vboxpci: iommu_attach_device() success\n");
218	pIns->fIommuUsed = true;
219	rc = VINF_SUCCESS;;
220	}
221	else
222	{
223	printk(KERN_DEBUG "vboxpci: iommu_attach_device() failed\n");
224	rc = VERR_INTERNAL_ERROR;
225	}
226
227	/* @todo: KVM checks IOMMU_CAP_CACHE_COHERENCY and sets
228	flag IOMMU_CACHE later used when mapping physical
229	addresses, which could improve performance. */
230
231	return rc;
232	#else
233	return VERR_NOT_SUPPORTED;
234	#endif
235	}
236
237	int vboxPciOsDevUnregisterWithIommu(PVBOXRAWPCIINS pIns)
238	{
239	#ifdef VBOX_WITH_IOMMU
240	int rc = VINF_SUCCESS;
241	PVBOXRAWPCIDRVVM pData = VBOX_DRV_VMDATA(pIns);
242
243	if (!pData)
244	{
245	printk(KERN_DEBUG "vboxpci: VM data not inited (detach)\n");
246	return VERR_INVALID_PARAMETER;
247	}
248
249	if (!pData->pIommuDomain)
250	{
251	printk(KERN_DEBUG "vboxpci: No IOMMU domain (detach)\n");
252	return VERR_NOT_FOUND;
253	}
254
255	if (pIns->fIommuUsed)
256	{
257	iommu_detach_device(pData->pIommuDomain, &pIns->pPciDev->dev);
258	printk(KERN_DEBUG "vboxpci: iommu_detach_device()\n");
259	pIns->fIommuUsed = false;
260	}
261
262	return rc;
263	#else
264	return VERR_NOT_SUPPORTED;
265	#endif
266	}
267
268	int vboxPciOsDevReset(PVBOXRAWPCIINS pIns)
269	{
270	int rc = VINF_SUCCESS;
271
272	if (pIns->pPciDev)
273	{
274	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
275	if (pci_reset_function(pIns->pPciDev))
276	{
277	printk(KERN_DEBUG "vboxpci: pci_reset_function() failed\n");
278	rc = VERR_INTERNAL_ERROR;
279	}
280	#else
281	rc = VERR_NOT_SUPPORTED;
282	#endif
283	}
284
285	return rc;
286	}
287
288	static struct file* vboxPciFileOpen(const char* path, int flags)
289	{
290	struct file* filp = NULL;
291	int err = 0;
292
293	filp = filp_open(path, flags, 0);
294
295	if (IS_ERR(filp))
296	{
297	err = PTR_ERR(filp);
298	printk(KERN_DEBUG "vboxPciFileOpen: error %d\n", err);
299	return NULL;
300	}
301
302	if (!filp->f_op \|\| !filp->f_op->write)
303	{
304	printk(KERN_DEBUG "Not writable FS\n");
305	filp_close(filp, NULL);
306	return NULL;
307	}
308
309	return filp;
310	}
311
312	static void vboxPciFileClose(struct file* file)
313	{
314	filp_close(file, NULL);
315	}
316
317	static int vboxPciFileWrite(struct file* file, unsigned long long offset, unsigned char* data, unsigned int size)
318	{
319	int ret;
320	mm_segment_t fs_save;
321
322	fs_save = get_fs();
323	set_fs(get_ds());
324	ret = vfs_write(file, data, size, &offset);
325	set_fs(fs_save);
326	if (ret < 0)
327	printk(KERN_DEBUG "vboxPciFileWrite: error %d\n", ret);
328
329	return ret;
330	}
331
332	#if 0
333	static int vboxPciFileRead(struct file* file, unsigned long long offset, unsigned char* data, unsigned int size)
334	{
335	int ret;
336	mm_segment_t fs_save;
337
338	fs_save = get_fs();
339	set_fs(get_ds());
340	ret = vfs_read(file, data, size, &offset);
341	set_fs(fs_save);
342
343	return ret;
344	}
345	#endif
346
347	int vboxPciOsDevDetachHostDriver(PVBOXRAWPCIINS pIns)
348	{
349	struct pci_dev *pPciDev = NULL;
350	uint8_t uBus = (pIns->HostPciAddress) >> 8;
351	uint8_t uDevFn = (pIns->HostPciAddress) & 0xff;
352	const char* currentDriver;
353	uint16_t uVendor, uDevice;
354	int fDetach = 0;
355
356	if (!g_VBoxPciGlobals.fPciStubModuleAvail)
357	{
358	printk(KERN_INFO "vboxpci: stub module %s not detected: cannot detach\n",
359	PCI_STUB_MODULE);
360	return VERR_ACCESS_DENIED;
361	}
362
363	pPciDev = PCI_DEV_GET_SLOT(uBus, uDevFn);
364
365	if (!pPciDev)
366	{
367	printk(KERN_INFO "vboxpci: device at %02x:%02x.%d not found\n",
368	uBus, uDevFn>>3, uDevFn&7);
369	return VERR_NOT_FOUND;
370	}
371
372	uVendor = pPciDev->vendor;
373	uDevice = pPciDev->device;
374
375	currentDriver = pPciDev->driver ? pPciDev->driver->name : NULL;
376
377	printk(KERN_DEBUG "vboxpci: detected device: %04x:%04x at %02x:%02x.%d, driver %s\n",
378	uVendor, uDevice, uBus, uDevFn>>3, uDevFn&7,
379	currentDriver ? currentDriver : "<none>");
380
381	fDetach = (currentDriver == NULL \|\| (strcmp(currentDriver, PCI_STUB_MODULE) != 0)) ? 1 : 0;
382
383	/* Init previous driver data. */
384	pIns->szPrevDriver[0] = '\0';
385
386	if (fDetach && currentDriver)
387	{
388	/* Dangerous: if device name for some reasons contains slashes - arbitrary file could be written to. */
389	if (strchr(currentDriver, '/') != 0)
390	{
391	printk(KERN_DEBUG "vboxpci: ERROR: %s contains invalid symbols\n", currentDriver);
392	return VERR_ACCESS_DENIED;
393	}
394	/** @todo: RTStrCopy not exported. */
395	strncpy(pIns->szPrevDriver, currentDriver, sizeof(pIns->szPrevDriver));
396	}
397
398	PCI_DEV_PUT(pPciDev);
399	pPciDev = NULL;
400
401	if (fDetach)
402	{
403	char* szCmdBuf;
404	char* szFileBuf;
405	struct file* pFile;
406	int iCmdLen;
407	const int cMaxBuf = 128;
408	const struct cred *pOldCreds;
409	struct cred *pNewCreds;
410
411	/*
412	* Now perform kernel analog of:
413	*
414	* echo -n "10de 040a" > /sys/bus/pci/drivers/pci-stub/new_id
415	* echo -n 0000:03:00.0 > /sys/bus/pci/drivers/nvidia/unbind
416	* echo -n 0000:03:00.0 > /sys/bus/pci/drivers/pci-stub/bind
417	*
418	* We do this way, as this interface is presumingly more stable than
419	* in-kernel ones.
420	*/
421	szCmdBuf = kmalloc(cMaxBuf, GFP_KERNEL);
422	szFileBuf = kmalloc(cMaxBuf, GFP_KERNEL);
423	if (!szCmdBuf \|\| !szFileBuf)
424	goto done;
425
426	/* Somewhat ugly hack - override current credentials */
427	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
428	pNewCreds = prepare_creds();
429	if (!pNewCreds)
430	goto done;
431
432	# if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
433	pNewCreds->fsuid = GLOBAL_ROOT_UID;
434	# else
435	pNewCreds->fsuid = 0;
436	# endif
437	pOldCreds = override_creds(pNewCreds);
438	#endif
439
440	RTStrPrintf(szFileBuf, cMaxBuf,
441	"/sys/bus/pci/drivers/%s/new_id",
442	PCI_STUB_MODULE);
443	pFile = vboxPciFileOpen(szFileBuf, O_WRONLY);
444	if (pFile)
445	{
446	iCmdLen = RTStrPrintf(szCmdBuf, cMaxBuf,
447	"%04x %04x",
448	uVendor, uDevice);
449	/* Don't write trailing \0 */
450	vboxPciFileWrite(pFile, 0, szCmdBuf, iCmdLen);
451	vboxPciFileClose(pFile);
452	}
453	else
454	printk(KERN_DEBUG "vboxpci: cannot open %s\n", szFileBuf);
455
456	iCmdLen = RTStrPrintf(szCmdBuf, cMaxBuf,
457	"0000:%02x:%02x.%d",
458	uBus, uDevFn>>3, uDevFn&7);
459
460	/* Unbind if bound to smth */
461	if (pIns->szPrevDriver[0])
462	{
463	RTStrPrintf(szFileBuf, cMaxBuf,
464	"/sys/bus/pci/drivers/%s/unbind",
465	pIns->szPrevDriver);
466	pFile = vboxPciFileOpen(szFileBuf, O_WRONLY);
467	if (pFile)
468	{
469
470	/* Don't write trailing \0 */
471	vboxPciFileWrite(pFile, 0, szCmdBuf, iCmdLen);
472	vboxPciFileClose(pFile);
473	}
474	else
475	printk(KERN_DEBUG "vboxpci: cannot open %s\n", szFileBuf);
476	}
477
478	RTStrPrintf(szFileBuf, cMaxBuf,
479	"/sys/bus/pci/drivers/%s/bind",
480	PCI_STUB_MODULE);
481	pFile = vboxPciFileOpen(szFileBuf, O_WRONLY);
482	if (pFile)
483	{
484	/* Don't write trailing \0 */
485	vboxPciFileWrite(pFile, 0, szCmdBuf, iCmdLen);
486	vboxPciFileClose(pFile);
487	}
488	else
489	printk(KERN_DEBUG "vboxpci: cannot open %s\n", szFileBuf);
490
491	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
492	revert_creds(pOldCreds);
493	put_cred(pNewCreds);
494	#endif
495
496	done:
497	kfree(szCmdBuf);
498	kfree(szFileBuf);
499	}
500
501	return 0;
502	}
503
504	int vboxPciOsDevReattachHostDriver(PVBOXRAWPCIINS pIns)
505	{
506	struct pci_dev *pPciDev = pIns->pPciDev;
507
508	if (!pPciDev)
509	return VINF_SUCCESS;
510
511	if (pIns->szPrevDriver[0])
512	{
513	char* szCmdBuf;
514	char* szFileBuf;
515	struct file* pFile;
516	int iCmdLen;
517	const int cMaxBuf = 128;
518	const struct cred *pOldCreds;
519	struct cred *pNewCreds;
520	uint8_t uBus = (pIns->HostPciAddress) >> 8;
521	uint8_t uDevFn = (pIns->HostPciAddress) & 0xff;
522
523	printk(KERN_DEBUG "vboxpci: reattaching old host driver %s\n", pIns->szPrevDriver);
524	/*
525	* Now perform kernel analog of:
526	*
527	* echo -n 0000:03:00.0 > /sys/bus/pci/drivers/pci-stub/unbind
528	* echo -n 0000:03:00.0 > /sys/bus/pci/drivers/nvidia/bind
529	*/
530	szCmdBuf = kmalloc(cMaxBuf, GFP_KERNEL);
531	szFileBuf = kmalloc(cMaxBuf, GFP_KERNEL);
532
533	if (!szCmdBuf \|\| !szFileBuf)
534	goto done;
535
536	iCmdLen = RTStrPrintf(szCmdBuf, cMaxBuf,
537	"0000:%02x:%02x.%d",
538	uBus, uDevFn>>3, uDevFn&7);
539
540	/* Somewhat ugly hack - override current credentials */
541	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
542	pNewCreds = prepare_creds();
543	if (!pNewCreds)
544	goto done;
545
546	# if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
547	pNewCreds->fsuid = GLOBAL_ROOT_UID;
548	# else
549	pNewCreds->fsuid = 0;
550	# endif
551	pOldCreds = override_creds(pNewCreds);
552	#endif
553	RTStrPrintf(szFileBuf, cMaxBuf,
554	"/sys/bus/pci/drivers/%s/unbind",
555	PCI_STUB_MODULE);
556	pFile = vboxPciFileOpen(szFileBuf, O_WRONLY);
557	if (pFile)
558	{
559
560	/* Don't write trailing \0 */
561	vboxPciFileWrite(pFile, 0, szCmdBuf, iCmdLen);
562	vboxPciFileClose(pFile);
563	}
564	else
565	printk(KERN_DEBUG "vboxpci: cannot open %s\n", szFileBuf);
566
567	RTStrPrintf(szFileBuf, cMaxBuf,
568	"/sys/bus/pci/drivers/%s/bind",
569	pIns->szPrevDriver);
570	pFile = vboxPciFileOpen(szFileBuf, O_WRONLY);
571	if (pFile)
572	{
573
574	/* Don't write trailing \0 */
575	vboxPciFileWrite(pFile, 0, szCmdBuf, iCmdLen);
576	vboxPciFileClose(pFile);
577	pIns->szPrevDriver[0] = '\0';
578	}
579	else
580	printk(KERN_DEBUG "vboxpci: cannot open %s\n", szFileBuf);
581
582	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
583	revert_creds(pOldCreds);
584	put_cred(pNewCreds);
585	#endif
586
587	done:
588	kfree(szCmdBuf);
589	kfree(szFileBuf);
590	}
591
592	return VINF_SUCCESS;
593	}
594
595	int vboxPciOsDevInit(PVBOXRAWPCIINS pIns, uint32_t fFlags)
596	{
597	struct pci_dev *pPciDev = NULL;
598	int rc;
599
600	printk(KERN_DEBUG "vboxpci: vboxPciOsDevInit: dev=%x\n", pIns->HostPciAddress);
601
602	if (fFlags & PCIRAWDRIVERRFLAG_DETACH_HOST_DRIVER)
603	{
604	rc = vboxPciOsDevDetachHostDriver(pIns);
605	if (RT_FAILURE(rc))
606	{
607	printk(KERN_DEBUG "Cannot detach host driver for device %x: %d\n",
608	pIns->HostPciAddress, rc);
609	return VERR_ACCESS_DENIED;
610	}
611	}
612
613
614	pPciDev = PCI_DEV_GET_SLOT((pIns->HostPciAddress) >> 8,
615	(pIns->HostPciAddress) & 0xff);
616
617	printk(KERN_DEBUG "vboxpci: vboxPciOsDevInit: dev=%x pdev=%p\n",
618	pIns->HostPciAddress, pPciDev);
619
620	if (!pPciDev)
621	return 0;
622
623	pIns->pPciDev = pPciDev;
624
625	rc = pci_enable_device(pPciDev);
626
627	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 1)
628	if (pci_enable_msi(pPciDev) == 0)
629	{
630	printk(KERN_DEBUG "vboxpci: enabled MSI\n");
631	pIns->fMsiUsed = true;
632	}
633	#endif
634
635	// pci_enable_msix(pPciDev, entries, nvec)
636
637	/* In fact, if device uses interrupts, and cannot be forced to use MSI or MSI-X
638	we have to refuse using it, as we cannot work with shared PCI interrupts (unless we're lucky
639	to grab unshared PCI interrupt). */
640
641	return VINF_SUCCESS;
642	}
643
644	int vboxPciOsDevDeinit(PVBOXRAWPCIINS pIns, uint32_t fFlags)
645	{
646	struct pci_dev *pPciDev = NULL;
647
648	printk(KERN_DEBUG "vboxpci: vboxPciOsDevDeinit: dev=%x\n", pIns->HostPciAddress);
649
650	pPciDev = pIns->pPciDev;
651
652	if (pPciDev)
653	{
654	vboxPciOsDevUnregisterWithIommu(pIns);
655
656	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 1)
657	if (pIns->fMsiUsed)
658	pci_disable_msi(pPciDev);
659	#endif
660	// pci_disable_msix(pPciDev);
661	pci_disable_device(pPciDev);
662	vboxPciOsDevReattachHostDriver(pIns);
663
664	PCI_DEV_PUT(pPciDev);
665	pIns->pPciDev = NULL;
666	}
667
668	return 0;
669	}
670
671	int vboxPciOsDevDestroy(PVBOXRAWPCIINS pIns)
672	{
673	return 0;
674	}
675
676	int vboxPciOsDevGetRegionInfo(PVBOXRAWPCIINS pIns,
677	int32_t iRegion,
678	RTHCPHYS *pRegionStart,
679	uint64_t *pu64RegionSize,
680	bool *pfPresent,
681	uint32_t *pfFlags)
682	{
683	int flags;
684	struct pci_dev *pPciDev = pIns->pPciDev;
685	uint32_t fResFlags;
686
687	if (!pPciDev)
688	{
689	*pfPresent = false;
690	return 0;
691	}
692
693	printk(KERN_DEBUG "%x: linux vboxPciOsDevGetRegionInfo: reg=%d\n",
694	pIns->HostPciAddress, iRegion);
695
696	flags = pci_resource_flags(pPciDev, iRegion);
697	if (((flags & (IORESOURCE_MEM \| IORESOURCE_IO)) == 0)
698	\|\|
699	((flags & IORESOURCE_DISABLED) != 0))
700	{
701	*pfPresent = false;
702	return 0;
703	}
704
705	*pfPresent = true;
706	fResFlags = 0;
707
708	if (flags & IORESOURCE_MEM)
709	fResFlags \|= PCIRAW_ADDRESS_SPACE_MEM;
710
711	if (flags & IORESOURCE_IO)
712	fResFlags \|= PCIRAW_ADDRESS_SPACE_IO;
713
714	#ifdef IORESOURCE_MEM_64
715	if (flags & IORESOURCE_MEM_64)
716	fResFlags \|= PCIRAW_ADDRESS_SPACE_BAR64;
717	#endif
718
719	if (flags & IORESOURCE_PREFETCH)
720	fResFlags \|= PCIRAW_ADDRESS_SPACE_MEM_PREFETCH;
721
722	*pfFlags = fResFlags;
723	*pRegionStart = pci_resource_start(pPciDev, iRegion);
724	*pu64RegionSize = pci_resource_len (pPciDev, iRegion);
725
726	printk(KERN_DEBUG "got %s region: %llx:%lld\n",
727	(flags & IORESOURCE_MEM) ? "mmio" : "pio", pRegionStart, pu64RegionSize);
728
729	return 0;
730	}
731
732	int vboxPciOsDevMapRegion(PVBOXRAWPCIINS pIns,
733	int32_t iRegion,
734	RTHCPHYS RegionStart,
735	uint64_t u64RegionSize,
736	uint32_t fFlags,
737	RTR0PTR *pRegionBase)
738	{
739	struct pci_dev *pPciDev = pIns->pPciDev;
740	struct resource *pRegion;
741	RTR0PTR result = 0;
742
743	printk(KERN_DEBUG "linux vboxPciOsDevMapRegion: reg=%d start=%llx size=%lld\n", iRegion, RegionStart, u64RegionSize);
744
745	if (!pPciDev)
746	return 0;
747
748	if (iRegion < 0 \|\| iRegion > 6)
749	{
750	printk(KERN_DEBUG "vboxPciOsDevMapRegion: invalid region: %d\n", iRegion);
751	return VERR_INVALID_PARAMETER;
752	}
753
754	pRegion = request_mem_region(RegionStart, u64RegionSize, "vboxpci");
755	if (!pRegion)
756	{
757	/** @todo: need to make sure if thise error indeed can be ignored. */
758	printk(KERN_DEBUG "request_mem_region() failed, don't care\n");
759	}
760
761	/* For now no caching, try to optimize later. */
762	result = ioremap_nocache(RegionStart, u64RegionSize);
763
764	if (!result)
765	{
766	printk(KERN_DEBUG "cannot ioremap_nocache\n");
767	if (pRegion)
768	release_mem_region(RegionStart, u64RegionSize);
769	return 0;
770	}
771
772	*pRegionBase = result;
773
774	return 0;
775	}
776
777	int vboxPciOsDevUnmapRegion(PVBOXRAWPCIINS pIns,
778	int32_t iRegion,
779	RTHCPHYS RegionStart,
780	uint64_t u64RegionSize,
781	RTR0PTR RegionBase)
782	{
783
784	iounmap(RegionBase);
785	release_mem_region(RegionStart, u64RegionSize);
786
787	return VINF_SUCCESS;
788	}
789
790	int vboxPciOsDevPciCfgWrite(PVBOXRAWPCIINS pIns, uint32_t Register, PCIRAWMEMLOC *pValue)
791	{
792	struct pci_dev *pPciDev = pIns->pPciDev;
793
794	if (!pPciDev)
795	return VINF_SUCCESS;
796
797	switch (pValue->cb)
798	{
799	case 1:
800	pci_write_config_byte(pPciDev, Register, pValue->u.u8);
801	break;
802	case 2:
803	pci_write_config_word(pPciDev, Register, pValue->u.u16);
804	break;
805	case 4:
806	pci_write_config_dword(pPciDev, Register, pValue->u.u32);
807	break;
808	}
809
810	return VINF_SUCCESS;
811	}
812
813	int vboxPciOsDevPciCfgRead (PVBOXRAWPCIINS pIns, uint32_t Register, PCIRAWMEMLOC *pValue)
814	{
815	struct pci_dev *pPciDev = pIns->pPciDev;
816
817	if (!pPciDev)
818	return VINF_SUCCESS;
819
820	switch (pValue->cb)
821	{
822	case 1:
823	pci_read_config_byte(pPciDev, Register, &pValue->u.u8);
824	break;
825	case 2:
826	pci_read_config_word(pPciDev, Register, &pValue->u.u16);
827	break;
828	case 4:
829	pci_read_config_dword(pPciDev, Register, &pValue->u.u32);
830	break;
831	}
832
833	return VINF_SUCCESS;
834	}
835
836	/**
837	* Interrupt service routine.
838	*
839	* @returns In 2.6 we indicate whether we've handled the IRQ or not.
840	*
841	* @param iIrq The IRQ number.
842	* @param pvDevId The device ID, a pointer to PVBOXRAWPCIINS.
843	* @param pvRegs Register set. Removed in 2.6.19.
844	*/
845	#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
846	static irqreturn_t vboxPciOsIrqHandler(int iIrq, void *pvDevId)
847	#else
848	static irqreturn_t vboxPciOsIrqHandler(int iIrq, void pvDevId, struct pt_regs pRegs)
849	#endif
850	{
851	PVBOXRAWPCIINS pIns = (PVBOXRAWPCIINS)pvDevId;
852	bool fTaken = true;
853
854	if (pIns && pIns->IrqHandler.pfnIrqHandler)
855	fTaken = pIns->IrqHandler.pfnIrqHandler(pIns->IrqHandler.pIrqContext, iIrq);
856	#ifndef VBOX_WITH_SHARED_PCI_INTERRUPTS
857	/* If we don't allow interrupts sharing, we consider all interrupts as non-shared, thus targetted to us. */
858	fTaken = true;
859	#endif
860
861	return fTaken;
862	}
863
864	int vboxPciOsDevRegisterIrqHandler(PVBOXRAWPCIINS pIns, PFNRAWPCIISR pfnHandler, void* pIrqContext, int32_t *piHostIrq)
865	{
866	int rc;
867	int32_t iIrq = pIns->pPciDev->irq;
868
869	if (iIrq == 0)
870	{
871	printk(KERN_DEBUG "device not assigned host interrupt\n");
872	return VERR_INVALID_PARAMETER;
873	}
874
875	rc = request_irq(iIrq,
876	vboxPciOsIrqHandler,
877	#ifdef VBOX_WITH_SHARED_PCI_INTERRUPTS
878	/* Allow interrupts sharing. */
879	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
880	IRQF_SHARED,
881	# else
882	SA_SHIRQ,
883	# endif
884
885	#else
886
887	/* We don't allow interrupts sharing */
888	# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
889	IRQF_DISABLED, /* keep irqs disabled when calling the action handler */
890	# else
891	0,
892	# endif
893	#endif
894	DRIVER_NAME,
895	pIns);
896	if (rc)
897	{
898	printk(KERN_DEBUG "could not request IRQ %d: err=%d\n", iIrq, rc);
899	return VERR_RESOURCE_BUSY;
900	}
901
902	printk(KERN_DEBUG "got PCI IRQ: %d\n", iIrq);
903	*piHostIrq = iIrq;
904	return VINF_SUCCESS;
905	}
906
907	int vboxPciOsDevUnregisterIrqHandler(PVBOXRAWPCIINS pIns, int32_t iHostIrq)
908	{
909	printk(KERN_DEBUG "free PCI IRQ: %d\n", iHostIrq);
910	free_irq(iHostIrq, pIns);
911	return VINF_SUCCESS;
912	}
913
914	int vboxPciOsDevPowerStateChange(PVBOXRAWPCIINS pIns, PCIRAWPOWERSTATE aState)
915	{
916	int rc;
917
918	printk(KERN_DEBUG "power state: %d\n", (int)aState);
919
920	switch (aState)
921	{
922	case PCIRAW_POWER_ON:
923	/* Reset device, just in case. */
924	vboxPciOsDevReset(pIns);
925	/* register us with IOMMU */
926	rc = vboxPciOsDevRegisterWithIommu(pIns);
927	break;
928	case PCIRAW_POWER_RESET:
929	rc = vboxPciOsDevReset(pIns);
930	break;
931	case PCIRAW_POWER_OFF:
932	/* unregister us from IOMMU */
933	rc = vboxPciOsDevUnregisterWithIommu(pIns);
934	break;
935	case PCIRAW_POWER_SUSPEND:
936	case PCIRAW_POWER_RESUME:
937	rc = VINF_SUCCESS;
938	/// @todo: what do we do here?
939	break;
940	default:
941	/* to make compiler happy */
942	rc = VERR_NOT_SUPPORTED;
943	break;
944	}
945
946	return rc;
947	}
948
949
950	#ifdef VBOX_WITH_IOMMU
951	/** Callback for FNRAWPCICONTIGPHYSMEMINFO. */
952	static int vboxPciOsContigMemInfo(PRAWPCIPERVM pVmCtx, RTHCPHYS HostStart, RTGCPHYS GuestStart, uint64_t cMemSize, PCIRAWMEMINFOACTION Action)
953	{
954	struct iommu_domain* domain = ((PVBOXRAWPCIDRVVM)(pVmCtx->pDriverData))->pIommuDomain;
955	int rc = VINF_SUCCESS;
956
957	switch (Action)
958	{
959	case PCIRAW_MEMINFO_MAP:
960	{
961	int flags, r;
962
963	if (iommu_iova_to_phys(domain, GuestStart))
964	break;
965
966	flags = IOMMU_READ \| IOMMU_WRITE;
967	/* @todo: flags \|= IOMMU_CACHE; */
968
969	r = iommu_map(domain, GuestStart, HostStart, get_order(cMemSize), flags);
970	if (r)
971	{
972	printk(KERN_ERR "vboxPciOsContigMemInfo:"
973	"iommu failed to map pfn=%llx\n", HostStart);
974	rc = VERR_GENERAL_FAILURE;
975	break;
976	}
977	rc = VINF_SUCCESS;
978	break;
979	}
980	case PCIRAW_MEMINFO_UNMAP:
981	{
982	int order;
983	order = iommu_unmap(domain, GuestStart, get_order(cMemSize));
984	NOREF(order);
985	break;
986	}
987
988	default:
989	printk(KERN_DEBUG "Unsupported action: %d\n", (int)Action);
990	rc = VERR_NOT_SUPPORTED;
991	break;
992	}
993
994	return rc;
995	}
996	#endif
997
998	int vboxPciOsInitVm(PVBOXRAWPCIDRVVM pThis, PVM pVM, PRAWPCIPERVM pVmData)
999	{
1000	#ifdef DEBUG
1001	printk(KERN_DEBUG "vboxPciOsInitVm: %p\n", pThis);
1002	#endif
1003	#ifdef VBOX_WITH_IOMMU
1004	if (IOMMU_PRESENT())
1005	{
1006	pThis->pIommuDomain = IOMMU_DOMAIN_ALLOC();
1007	if (!pThis->pIommuDomain)
1008	{
1009	printk(KERN_DEBUG "cannot allocate IOMMU domain\n");
1010	return VERR_NO_MEMORY;
1011	}
1012
1013	pVmData->pfnContigMemInfo = vboxPciOsContigMemInfo;
1014
1015	printk(KERN_DEBUG "created IOMMU domain %p\n", pThis->pIommuDomain);
1016	}
1017	#endif
1018	return VINF_SUCCESS;
1019	}
1020
1021	void vboxPciOsDeinitVm(PVBOXRAWPCIDRVVM pThis, PVM pVM)
1022	{
1023	#ifdef DEBUG
1024	printk(KERN_DEBUG "vboxPciOsDeinitVm: %p\n", pThis);
1025	#endif
1026	#ifdef VBOX_WITH_IOMMU
1027	if (pThis->pIommuDomain)
1028	{
1029	iommu_domain_free(pThis->pIommuDomain);
1030	pThis->pIommuDomain = NULL;
1031	}
1032	#endif
1033	}

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source: vbox/trunk/src/VBox/HostDrivers/VBoxPci/linux/VBoxPci-linux.c@ 45300

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