VirtioPci-solaris.c@ 63100

Last change on this file since 63100 was 62529, checked in by vboxsync, 8 years ago
(C) 2016
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1	/* $Id: VirtioPci-solaris.c 62529 2016-07-22 19:19:25Z vboxsync $ */
2	/** @file
3	* VirtualBox Guest Additions - Virtio Driver for Solaris, PCI Hypervisor Interface.
4	*/
5
6	/*
7	* Copyright (C) 2010-2016 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include "VirtioPci-solaris.h"
32
33	#include <iprt/asm.h>
34	#include <iprt/assert.h>
35	#include <iprt/mem.h>
36	#include <iprt/param.h>
37	#include <VBox/log.h>
38
39	#include <sys/pci.h>
40	#include <sys/param.h>
41
42
43	/*********************************************************************************************************************************
44	* Defined Constants And Macros *
45	*********************************************************************************************************************************/
46	/*
47	* Pci Register offsets.
48	*/
49	#define VIRTIO_PCI_HOST_FEATURES 0x00
50	#define VIRTIO_PCI_GUEST_FEATURES 0x04
51	#define VIRTIO_PCI_QUEUE_PFN 0x08
52	#define VIRTIO_PCI_QUEUE_NUM 0x0C
53	#define VIRTIO_PCI_QUEUE_SEL 0x0E
54	#define VIRTIO_PCI_QUEUE_NOTIFY 0x10
55	#define VIRTIO_PCI_STATUS 0x12
56	#define VIRTIO_PCI_ISR 0x13
57	#define VIRTIO_PCI_CONFIG 0x14
58
59	#define VIRTIO_PCI_RING_ALIGN PAGE_SIZE
60	#define VIRTIO_PCI_QUEUE_ADDR_SHIFT PAGE_SHIFT
61
62	/**
63	* virtio_pci_t: Private data per device instance.
64	*/
65	typedef struct virtio_pci_t
66	{
67	ddi_acc_handle_t hIO; /* IO handle */
68	caddr_t addrIOBase; /* IO base address */
69	} virtio_pci_t;
70
71	/**
72	* virtio_pci_queue_t: Private data per queue instance.
73	*/
74	typedef struct virtio_pci_queue_t
75	{
76	ddi_dma_handle_t hDMA; /* DMA handle. */
77	ddi_acc_handle_t hIO; /* IO handle. */
78	size_t cbBuf; /* Physical address of buffer. */
79	paddr_t physBuf; /* Size of buffer. */
80	pfn_t pageBuf; /* Page frame number of buffer. */
81	} virtio_pci_queue_t;
82
83	static ddi_device_acc_attr_t g_VirtioPciAccAttrRegs =
84	{
85	DDI_DEVICE_ATTR_V0, /* Version */
86	DDI_STRUCTURE_LE_ACC, /* Structural data access in little endian. */
87	DDI_STRICTORDER_ACC, /* Strict ordering. */
88	DDI_DEFAULT_ACC /* Default access, possible panic on errors*/
89	};
90
91	static ddi_device_acc_attr_t g_VirtioPciAccAttrRing =
92	{
93	DDI_DEVICE_ATTR_V0, /* Version. */
94	DDI_NEVERSWAP_ACC, /* Data access with no byte swapping*/
95	DDI_STRICTORDER_ACC, /* Strict ordering. */
96	DDI_DEFAULT_ACC /* Default access, possible panic on errors*/
97	};
98
99	static ddi_dma_attr_t g_VirtioPciDmaAttrRing =
100	{
101	DMA_ATTR_V0, /* Version. */
102	0, /* Lowest usable address. */
103	0xffffffffffffffffULL, /* Highest usable address. */
104	0x7fffffff, /* Maximum DMAable byte count. */
105	VIRTIO_PCI_RING_ALIGN, /* Alignment in bytes. */
106	0x7ff, /* Bitmap of burst sizes */
107	1, /* Minimum transfer. */
108	0xffffffffU, /* Maximum transfer. */
109	0xffffffffffffffffULL, /* Maximum segment length. */
110	1, /* Maximum number of segments. */
111	1, /* Granularity. */
112	0 /* Flags (reserved). */
113	};
114
115	/** Pointer to the interrupt handle vector */
116	static ddi_intr_handle_t *g_pIntr;
117	/** Number of actually allocated interrupt handles */
118	static size_t g_cIntrAllocated;
119	/** The IRQ Mutex */
120	static kmutex_t g_IrqMtx;
121
122
123	/*********************************************************************************************************************************
124	* Internal Functions *
125	*********************************************************************************************************************************/
126	static void *VirtioPciAlloc(PVIRTIODEVICE pDevice);
127	static void VirtioPciFree(PVIRTIODEVICE pDevice);
128	static int VirtioPciAttach(PVIRTIODEVICE pDevice);
129	static int VirtioPciDetach(PVIRTIODEVICE pDevice);
130	static uint32_t VirtioPciGetFeatures(PVIRTIODEVICE pDevice);
131	static void VirtioPciSetFeatures(PVIRTIODEVICE pDevice, uint32_t fFeatures);
132	static int VirtioPciNotifyQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
133	static void VirtioPciGet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb);
134	static void VirtioPciSet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb);
135	static void *VirtioPciGetQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
136	static void VirtioPciPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue);
137	static void VirtioPciSetStatus(PVIRTIODEVICE pDevice, uint8_t Status);
138
139	static uint_t VirtioPciISR(caddr_t Arg);
140	static int VirtioPciSetupIRQ(dev_info_t *pDip);
141	static void VirtioPciRemoveIRQ(dev_info_t *pDip);
142
143	/**
144	* Hypervisor operations for Virtio Pci.
145	*/
146	VIRTIOHYPEROPS g_VirtioHyperOpsPci =
147	{
148	VirtioPciAlloc,
149	VirtioPciFree,
150	VirtioPciAttach,
151	VirtioPciDetach,
152	VirtioPciGetFeatures,
153	VirtioPciSetFeatures,
154	VirtioPciNotifyQueue,
155	VirtioPciGet,
156	VirtioPciSet,
157	VirtioPciGetQueue,
158	VirtioPciPutQueue,
159	VirtioPciSetStatus
160	};
161
162
163	/**
164	* Virtio Pci private data allocation routine.
165	*
166	* @param pDevice Pointer to the Virtio device instance.
167	* @return Allocated private data structure which must only be freed by calling
168	* VirtioPciFree().
169	*/
170	static void *VirtioPciAlloc(PVIRTIODEVICE pDevice)
171	{
172	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciAlloc pDevice=%p\n", pDevice));
173	virtio_pci_t *pPciData = RTMemAllocZ(sizeof(virtio_pci_t));
174	return pPciData;
175	}
176
177
178	/**
179	* Virtio Pci private data deallocation routine.
180	*
181	* @param pDevice Pointer to the Virtio device instance.
182	*/
183	static void VirtioPciFree(PVIRTIODEVICE pDevice)
184	{
185	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciFree pDevice=%p\n", pDevice));
186	virtio_pci_t *pPciData = pDevice->pvHyper;
187	if (pPciData)
188	{
189	RTMemFree(pDevice->pvHyper);
190	pDevice->pvHyper = NULL;
191	}
192	}
193
194
195	/**
196	* Virtio Pci attach routine, called from driver attach.
197	*
198	* @param pDevice Pointer to the Virtio device instance.
199	*
200	* @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
201	*/
202	static int VirtioPciAttach(PVIRTIODEVICE pDevice)
203	{
204	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciAttach pDevice=%p\n", pDevice));
205	virtio_pci_t *pPciData = pDevice->pvHyper;
206	AssertReturn(pPciData, DDI_FAILURE);
207
208	int rc = ddi_regs_map_setup(pDevice->pDip,
209	1, /* reg. num */
210	&pPciData->addrIOBase,
211	0, /* offset */
212	0, /* length */
213	&g_VirtioPciAccAttrRegs,
214	&pPciData->hIO);
215	if (rc == DDI_SUCCESS)
216	{
217	/*
218	* Reset the device.
219	*/
220	VirtioPciSetStatus(pDevice, 0);
221
222	/*
223	* Add interrupt handler.
224	*/
225	VirtioPciSetupIRQ(pDevice->pDip);
226
227	LogFlow((VIRTIOLOGNAME ":VirtioPciAttach: successfully mapped registers.\n"));
228	return DDI_SUCCESS;
229	}
230	else
231	LogRel((VIRTIOLOGNAME ":VirtioPciAttach: ddi_regs_map_setup failed. rc=%d\n", rc));
232	return DDI_FAILURE;
233	}
234
235
236	/**
237	* Virtio Pci detach routine, called from driver detach.
238	*
239	* @param pDevice Pointer to the Virtio device instance.
240	*
241	* @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
242	*/
243	static int VirtioPciDetach(PVIRTIODEVICE pDevice)
244	{
245	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciDetach pDevice=%p\n", pDevice));
246	virtio_pci_t *pPciData = pDevice->pvHyper;
247	AssertReturn(pPciData, DDI_FAILURE);
248
249	VirtioPciRemoveIRQ(pDevice->pDip);
250	ddi_regs_map_free(&pPciData->hIO);
251	return DDI_SUCCESS;
252	}
253
254
255	/**
256	* Get host supported features.
257	*
258	* @param pDevice Pointer to the Virtio device instance.
259	*
260	* @return Mask of host features.
261	*/
262	static uint32_t VirtioPciGetFeatures(PVIRTIODEVICE pDevice)
263	{
264	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGetFeatures pDevice=%p\n", pDevice));
265	virtio_pci_t *pPciData = pDevice->pvHyper;
266	AssertReturn(pPciData, 0);
267
268	return ddi_get32(pPciData->hIO, (uint32_t *)(pPciData->addrIOBase + VIRTIO_PCI_HOST_FEATURES));
269	}
270
271
272	/**
273	* Set guest supported features.
274	*
275	* @param pDevice Pointer to the Virtio device instance.
276	* @param u32Features Mask of guest supported features.
277	*/
278	static void VirtioPciSetFeatures(PVIRTIODEVICE pDevice, uint32_t u32Features)
279	{
280	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciSetFeatures pDevice=%p\n", pDevice));
281	virtio_pci_t *pPciData = pDevice->pvHyper;
282	AssertReturnVoid(pPciData);
283
284	ddi_put32(pPciData->hIO, (uint32_t *)(pPciData->addrIOBase + VIRTIO_PCI_GUEST_FEATURES), u32Features);
285	}
286
287
288	/**
289	* Update the queue, notify the host.
290	*
291	* @param pDevice Pointer to the Virtio device instance.
292	* @param pQueue Pointer to the Queue that is doing the notification.
293	*
294	* @return Solaris DDI error code. DDI_SUCCESS or DDI_FAILURE.
295	*/
296	static int VirtioPciNotifyQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
297	{
298	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciNotifyQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
299	virtio_pci_t *pPciData = pDevice->pvHyper;
300	AssertReturn(pPciData, DDI_FAILURE);
301
302	pQueue->Ring.pRingAvail->Index += pQueue->cBufs;
303	pQueue->cBufs = 0;
304
305	ASMCompilerBarrier();
306
307	ddi_put16(pPciData->hIO, (uint16_t *)(pPciData->addrIOBase + VIRTIO_PCI_QUEUE_NOTIFY), pQueue->QueueIndex);
308	cmn_err(CE_NOTE, "VirtioPciNotifyQueue\n");
309	}
310
311
312
313	/**
314	* Virtio Pci set (write) routine.
315	*
316	* @param pDevice Pointer to the Virtio device instance.
317	* @param off Offset into the PCI config space.
318	* @param pv Pointer to the buffer to write from.
319	* @param cb Size of the buffer in bytes.
320	*/
321	static void VirtioPciSet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb)
322	{
323	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciSet pDevice=%p\n", pDevice));
324	virtio_pci_t *pPciData = pDevice->pvHyper;
325	AssertReturnVoid(pPciData);
326
327	uint8_t *pb = pv;
328	for (size_t i = 0; i < cb; i++, pb++)
329	ddi_put8(pPciData->hIO, (uint8_t )(pPciData->addrIOBase + VIRTIO_PCI_CONFIG + off + i), pb);
330	}
331
332
333	/**
334	* Virtio Pci get (read) routine.
335	*
336	* @param pDevice Pointer to the Virtio device instance.
337	* @param off Offset into the PCI config space.
338	* @param pv Where to store the read data.
339	* @param cb Size of the buffer in bytes.
340	*/
341	static void VirtioPciGet(PVIRTIODEVICE pDevice, off_t off, void *pv, size_t cb)
342	{
343	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGet pDevice=%p off=%u pv=%p cb=%u\n", pDevice, off, pv, cb));
344	virtio_pci_t *pPciData = pDevice->pvHyper;
345	AssertReturnVoid(pPciData);
346
347	uint8_t *pb = pv;
348	for (size_t i = 0; i < cb; i++, pb++)
349	pb = ddi_get8(pPciData->hIO, (uint8_t )(pPciData->addrIOBase + VIRTIO_PCI_CONFIG + off + i));
350	}
351
352
353	/**
354	* Virtio Pci put queue routine. Places the queue and frees associated queue.
355	*
356	* @param pDevice Pointer to the Virtio device instance.
357	* @param pQueue Pointer to the queue.
358	*/
359	static void VirtioPciPutQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
360	{
361	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciPutQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
362	AssertReturnVoid(pDevice);
363	AssertReturnVoid(pQueue);
364
365	virtio_pci_t *pPci = pDevice->pvHyper;
366	AssertReturnVoid(pPci);
367	virtio_pci_queue_t *pPciQueue = pQueue->pvData;
368	if (RT_UNLIKELY(!pPciQueue))
369	{
370	LogRel((VIRTIOLOGNAME ":VirtioPciPutQueue missing Pci queue.\n"));
371	return;
372	}
373
374	ddi_put16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_SEL), pQueue->QueueIndex);
375	ddi_put32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN), 0);
376
377	ddi_dma_unbind_handle(pPciQueue->hDMA);
378	ddi_dma_mem_free(&pPciQueue->hIO);
379	ddi_dma_free_handle(&pPciQueue->hDMA);
380	RTMemFree(pPciQueue);
381	}
382
383
384	/**
385	* Virtio Pci get queue routine. Allocates a PCI queue and DMA resources.
386	*
387	* @param pDevice Pointer to the Virtio device instance.
388	* @param pQueue Where to store the queue.
389	*
390	* @return An allocated Virtio Pci queue, or NULL in case of errors.
391	*/
392	static void *VirtioPciGetQueue(PVIRTIODEVICE pDevice, PVIRTIOQUEUE pQueue)
393	{
394	LogFlowFunc((VIRTIOLOGNAME ":VirtioPciGetQueue pDevice=%p pQueue=%p\n", pDevice, pQueue));
395	AssertReturn(pDevice, NULL);
396
397	virtio_pci_t *pPci = pDevice->pvHyper;
398	AssertReturn(pPci, NULL);
399
400	/*
401	* Select a Queue.
402	*/
403	ddi_put16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_SEL), pQueue->QueueIndex);
404
405	/*
406	* Get the currently selected Queue's size.
407	*/
408	pQueue->Ring.cDesc = ddi_get16(pPci->hIO, (uint16_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_NUM));
409	if (RT_UNLIKELY(!pQueue->Ring.cDesc))
410	{
411	LogRel((VIRTIOLOGNAME ": VirtioPciGetQueue: Queue[%d] has no descriptors.\n", pQueue->QueueIndex));
412	return NULL;
413	}
414
415	/*
416	* Check if it's already active.
417	*/
418	uint32_t QueuePFN = ddi_get32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN));
419	if (QueuePFN != 0)
420	{
421	LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: Queue[%d] is already used.\n", pQueue->QueueIndex));
422	return NULL;
423	}
424
425	LogFlow(("Queue[%d] has %d slots.\n", pQueue->QueueIndex, pQueue->Ring.cDesc));
426
427	/*
428	* Allocate and initialize Pci queue data.
429	*/
430	virtio_pci_queue_t *pPciQueue = RTMemAllocZ(sizeof(virtio_pci_queue_t));
431	if (pPciQueue)
432	{
433	/*
434	* Setup DMA.
435	*/
436	size_t cbQueue = VirtioRingSize(pQueue->Ring.cDesc, VIRTIO_PCI_RING_ALIGN);
437	int rc = ddi_dma_alloc_handle(pDevice->pDip, &g_VirtioPciDmaAttrRing, DDI_DMA_SLEEP, 0 /* addr */, &pPciQueue->hDMA);
438	if (rc == DDI_SUCCESS)
439	{
440	rc = ddi_dma_mem_alloc(pPciQueue->hDMA, cbQueue, &g_VirtioPciAccAttrRing, DDI_DMA_CONSISTENT,
441	DDI_DMA_SLEEP, 0 /* addr */, &pQueue->pQueue, &pPciQueue->cbBuf,
442	&pPciQueue->hIO);
443	if (rc == DDI_SUCCESS)
444	{
445	AssertRelease(pPciQueue->cbBuf >= cbQueue);
446	ddi_dma_cookie_t DmaCookie;
447	uint_t cCookies;
448	rc = ddi_dma_addr_bind_handle(pPciQueue->hDMA, NULL /* addrspace */, pQueue->pQueue, pPciQueue->cbBuf,
449	DDI_DMA_RDWR \| DDI_DMA_CONSISTENT, DDI_DMA_SLEEP,
450	0 /* addr */, &DmaCookie, &cCookies);
451	if (rc == DDI_SUCCESS)
452	{
453	pPciQueue->physBuf = DmaCookie.dmac_laddress;
454	pPciQueue->pageBuf = pPciQueue->physBuf >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
455
456	LogFlow((VIRTIOLOGNAME ":VirtioPciGetQueue: Queue[%d]%p physBuf=%x pfn of Buf %#x\n", pQueue->QueueIndex,
457	pQueue->pQueue, pPciQueue->physBuf, pPciQueue->pageBuf));
458	cmn_err(CE_NOTE, ":VirtioPciGetQueue: Queue[%d]%p physBuf=%x pfn of Buf %x\n", pQueue->QueueIndex,
459	pQueue->pQueue, pPciQueue->physBuf, pPciQueue->pageBuf);
460
461	/*
462	* Activate the queue and initialize a ring for the queue.
463	*/
464	memset(pQueue->pQueue, 0, pPciQueue->cbBuf);
465	ddi_put32(pPci->hIO, (uint32_t *)(pPci->addrIOBase + VIRTIO_PCI_QUEUE_PFN), pPciQueue->pageBuf);
466	VirtioRingInit(pQueue, pQueue->Ring.cDesc, pQueue->pQueue, VIRTIO_PCI_RING_ALIGN);
467	return pPciQueue;
468	}
469	else
470	LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_addr_bind_handle failed. rc=%d\n", rc));
471
472	ddi_dma_mem_free(&pPciQueue->hIO);
473	}
474	else
475	LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_mem_alloc failed for %u bytes rc=%d\n", cbQueue, rc));
476
477	ddi_dma_free_handle(&pPciQueue->hDMA);
478	}
479	else
480	LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: ddi_dma_alloc_handle failed. rc=%d\n", rc));
481
482	RTMemFree(pPciQueue);
483	}
484	else
485	LogRel((VIRTIOLOGNAME ":VirtioPciGetQueue: failed to alloc %u bytes for Pci Queue data.\n", sizeof(virtio_pci_queue_t)));
486
487	return NULL;
488	}
489
490
491	/**
492	* Set the Virtio PCI status bit.
493	*
494	* @param pDevice Pointer to the Virtio device instance.
495	* @param Status The status to set.
496	*/
497	static void VirtioPciSetStatus(PVIRTIODEVICE pDevice, uint8_t Status)
498	{
499	virtio_pci_t *pPciData = pDevice->pvHyper;
500	ddi_put8(pPciData->hIO, (uint8_t *)(pPciData->addrIOBase + VIRTIO_PCI_STATUS), Status);
501	}
502
503
504	/**
505	* Sets up IRQ for Virtio PCI.
506	*
507	* @param pDip Pointer to the device info structure.
508	*
509	* @return Solaris error code.
510	*/
511	static int VirtioPciSetupIRQ(dev_info_t *pDip)
512	{
513	LogFlow((VIRTIOLOGNAME ":VirtioPciSetupIRQ: pDip=%p\n", pDip));
514	cmn_err(CE_NOTE, "VirtioPciSetupIRQ\n");
515
516	int IntrType = 0;
517	int rc = ddi_intr_get_supported_types(pDip, &IntrType);
518	if (rc == DDI_SUCCESS)
519	{
520	/* We won't need to bother about MSIs. */
521	if (IntrType & DDI_INTR_TYPE_FIXED)
522	{
523	int IntrCount = 0;
524	rc = ddi_intr_get_nintrs(pDip, IntrType, &IntrCount);
525	if ( rc == DDI_SUCCESS
526	&& IntrCount > 0)
527	{
528	int IntrAvail = 0;
529	rc = ddi_intr_get_navail(pDip, IntrType, &IntrAvail);
530	if ( rc == DDI_SUCCESS
531	&& IntrAvail > 0)
532	{
533	/* Allocated kernel memory for the interrupt handles. The allocation size is stored internally. */
534	g_pIntr = RTMemAllocZ(IntrCount * sizeof(ddi_intr_handle_t));
535	if (g_pIntr)
536	{
537	int IntrAllocated;
538	rc = ddi_intr_alloc(pDip, g_pIntr, IntrType, 0, IntrCount, &IntrAllocated, DDI_INTR_ALLOC_NORMAL);
539	if ( rc == DDI_SUCCESS
540	&& IntrAllocated > 0)
541	{
542	g_cIntrAllocated = IntrAllocated;
543	uint_t uIntrPriority;
544	rc = ddi_intr_get_pri(g_pIntr[0], &uIntrPriority);
545	if (rc == DDI_SUCCESS)
546	{
547	/* Initialize the mutex. */
548	mutex_init(&g_IrqMtx, NULL, MUTEX_DRIVER, DDI_INTR_PRI(uIntrPriority));
549
550	/* Assign interrupt handler functions and enable interrupts. */
551	for (int i = 0; i < IntrAllocated; i++)
552	{
553	rc = ddi_intr_add_handler(g_pIntr[i], (ddi_intr_handler_t *)VirtioPciISR,
554	NULL /* No Private Data */, NULL);
555	if (rc == DDI_SUCCESS)
556	rc = ddi_intr_enable(g_pIntr[i]);
557	if (rc != DDI_SUCCESS)
558	{
559	/* Changing local IntrAllocated to hold so-far allocated handles for freeing. */
560	IntrAllocated = i;
561	break;
562	}
563	}
564	if (rc == DDI_SUCCESS)
565	{
566	cmn_err(CE_NOTE, "VirtioPciSetupIRQ success\n");
567	return rc;
568	}
569
570	/* Remove any assigned handlers */
571	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ failed to assign IRQs allocated=%d\n", IntrAllocated));
572	for (int x = 0; x < IntrAllocated; x++)
573	ddi_intr_remove_handler(g_pIntr[x]);
574	}
575	else
576	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ failed to get priority of interrupt. rc=%d\n", rc));
577
578	/* Remove allocated IRQs, too bad we can free only one handle at a time. */
579	for (int k = 0; k < g_cIntrAllocated; k++)
580	ddi_intr_free(g_pIntr[k]);
581	}
582	else
583	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to allocated IRQs. count=%d\n", IntrCount));
584	RTMemFree(g_pIntr);
585	}
586	else
587	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to allocated IRQs. count=%d\n", IntrCount));
588	}
589	else
590	{
591	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get or insufficient available IRQs. rc=%d IntrAvail=%d\n",
592	rc, IntrAvail));
593	}
594	}
595	else
596	{
597	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get or insufficient number of IRQs. rc=%d IntrCount=%d\n", rc,
598	IntrCount));
599	}
600	}
601	else
602	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: invalid irq type. IntrType=%#x\n", IntrType));
603	}
604	else
605	LogRel((VIRTIOLOGNAME ":VirtioPciSetupIRQ: failed to get supported interrupt types\n"));
606	return rc;
607	}
608
609
610	/**
611	* Removes IRQ for Virtio PCI device.
612	*
613	* @param pDip Pointer to the device info structure.
614	*/
615	static void VirtioPciRemoveIRQ(dev_info_t *pDip)
616	{
617	LogFlow((VIRTIOLOGNAME ":VirtioPciRemoveIRQ pDip=%p:\n", pDip));
618
619	for (int i = 0; i < g_cIntrAllocated; i++)
620	{
621	int rc = ddi_intr_disable(g_pIntr[i]);
622	if (rc == DDI_SUCCESS)
623	{
624	rc = ddi_intr_remove_handler(g_pIntr[i]);
625	if (rc == DDI_SUCCESS)
626	ddi_intr_free(g_pIntr[i]);
627	}
628	}
629	RTMemFree(g_pIntr);
630	mutex_destroy(&g_IrqMtx);
631	}
632
633
634	/**
635	* Interrupt Service Routine for Virtio PCI device.
636	*
637	* @param Arg Private data (unused, will be NULL).
638	* @returns DDI_INTR_CLAIMED if it's our interrupt, DDI_INTR_UNCLAIMED if it isn't.
639	*/
640	static uint_t VirtioPciISR(caddr_t Arg)
641	{
642	LogFlow((VIRTIOLOGNAME ":VBoxGuestSolarisISR\n"));
643	cmn_err(CE_NOTE, "VBoxGuestSolarisISRd Arg=%p\n", Arg);
644
645	mutex_enter(&g_IrqMtx);
646	bool fOurIRQ = false;
647	/*
648	* Call the DeviceOps ISR routine somehow which should notify all Virtio queues
649	* on the interrupt.
650	*/
651	mutex_exit(&g_IrqMtx);
652
653	return fOurIRQ ? DDI_INTR_CLAIMED : DDI_INTR_UNCLAIMED;
654	}
655

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source: vbox/trunk/src/VBox/Additions/solaris/Virtio/VirtioPci-solaris.c@ 63100

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