VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/os2/SUPDrv-os2.cpp@ 15941

Last change on this file since 15941 was 13998, checked in by vboxsync, 16 years ago

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1/* $Id: SUPDrv-os2.cpp 13998 2008-11-10 12:08:56Z vboxsync $ */
2/** @file
3 * VBoxDrv - The VirtualBox Support Driver - OS/2 specifics.
4 */
5
6/*
7 * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
8 *
9 * Permission is hereby granted, free of charge, to any person
10 * obtaining a copy of this software and associated documentation
11 * files (the "Software"), to deal in the Software without
12 * restriction, including without limitation the rights to use,
13 * copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following
16 * conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
29 */
30
31/*******************************************************************************
32* Header Files *
33*******************************************************************************/
34#define LOG_GROUP LOG_GROUP_SUP_DRV
35#define __STDC_CONSTANT_MACROS
36#define __STDC_LIMIT_MACROS
37
38#include <os2ddk/bsekee.h>
39#undef RT_MAX
40
41#include "SUPDrvInternal.h"
42#include <VBox/version.h>
43#include <iprt/initterm.h>
44#include <iprt/string.h>
45#include <iprt/spinlock.h>
46#include <iprt/process.h>
47#include <iprt/assert.h>
48#include <VBox/log.h>
49#include <iprt/param.h>
50
51
52/*******************************************************************************
53* Global Variables *
54*******************************************************************************/
55/**
56 * Device extention & session data association structure.
57 */
58static SUPDRVDEVEXT g_DevExt;
59/** Spinlock protecting g_apSessionHashTab. */
60static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
61/** Hash table */
62static PSUPDRVSESSION g_apSessionHashTab[19];
63/** Calculates the index into g_apSessionHashTab.*/
64#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
65
66__BEGIN_DECLS
67/* Defined in SUPDrvA-os2.asm */
68extern uint16_t g_offLogHead;
69extern uint16_t volatile g_offLogTail;
70extern uint16_t const g_cchLogMax;
71extern char g_szLog[];
72/* (init only:) */
73extern char g_szInitText[];
74extern uint16_t g_cchInitText;
75extern uint16_t g_cchInitTextMax;
76__END_DECLS
77
78
79/*******************************************************************************
80* Internal Functions *
81*******************************************************************************/
82
83
84
85/**
86 * 32-bit Ring-0 initialization.
87 *
88 * @returns 0 on success, non-zero on failure.
89 * @param pszArgs Pointer to the device arguments.
90 */
91DECLASM(int) VBoxDrvInit(const char *pszArgs)
92{
93 dprintf(("VBoxDrvInit: pszArgs=%s\n", pszArgs));
94
95 /*
96 * Initialize the runtime.
97 */
98 int rc = RTR0Init(0);
99 if (RT_SUCCESS(rc))
100 {
101 /*
102 * Initialize the device extension.
103 */
104 rc = supdrvInitDevExt(&g_DevExt);
105 if (RT_SUCCESS(rc))
106 {
107 /*
108 * Initialize the session hash table.
109 */
110 rc = RTSpinlockCreate(&g_Spinlock);
111 if (RT_SUCCESS(rc))
112 {
113 /*
114 * Process the commandline. Later.
115 */
116 bool fVerbose = true;
117
118 /*
119 * Success
120 */
121 if (fVerbose)
122 {
123 strcpy(&g_szInitText[0],
124 "\r\n"
125 "VirtualBox.org Support Driver for OS/2 version " VBOX_VERSION_STRING "\r\n"
126 "Copyright (C) 2007 Knut St. Osmundsen\r\n"
127 "Copyright (C) 2007 Sun Microsystems, Inc.\r\n");
128 g_cchInitText = strlen(&g_szInitText[0]);
129 }
130 return VINF_SUCCESS;
131 }
132 g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: RTSpinlockCreate failed, rc=%Rrc\n", rc);
133 supdrvDeleteDevExt(&g_DevExt);
134 }
135 else
136 g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: supdrvInitDevExt failed, rc=%Rrc\n", rc);
137 RTR0Term();
138 }
139 else
140 g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: RTR0Init failed, rc=%Rrc\n", rc);
141 return rc;
142}
143
144
145DECLASM(int) VBoxDrvOpen(uint16_t sfn)
146{
147 int rc;
148 PSUPDRVSESSION pSession;
149
150 /*
151 * Create a new session.
152 */
153 rc = supdrvCreateSession(&g_DevExt, true /* fUser */, &pSession);
154 if (RT_SUCCESS(rc))
155 {
156 pSession->sfn = sfn;
157
158 /*
159 * Insert it into the hash table.
160 */
161 unsigned iHash = SESSION_HASH(sfn);
162 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
163 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
164 pSession->pNextHash = g_apSessionHashTab[iHash];
165 g_apSessionHashTab[iHash] = pSession;
166 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
167 }
168
169 dprintf(("VBoxDrvOpen: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
170 return rc;
171}
172
173
174DECLASM(int) VBoxDrvClose(uint16_t sfn)
175{
176 dprintf(("VBoxDrvClose: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
177
178 /*
179 * Remove from the hash table.
180 */
181 PSUPDRVSESSION pSession;
182 const RTPROCESS Process = RTProcSelf();
183 const unsigned iHash = SESSION_HASH(sfn);
184 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
185 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
186
187 pSession = g_apSessionHashTab[iHash];
188 if (pSession)
189 {
190 if ( pSession->sfn == sfn
191 && pSession->Process == Process)
192 {
193 g_apSessionHashTab[iHash] = pSession->pNextHash;
194 pSession->pNextHash = NULL;
195 }
196 else
197 {
198 PSUPDRVSESSION pPrev = pSession;
199 pSession = pSession->pNextHash;
200 while (pSession)
201 {
202 if ( pSession->sfn == sfn
203 && pSession->Process == Process)
204 {
205 pPrev->pNextHash = pSession->pNextHash;
206 pSession->pNextHash = NULL;
207 break;
208 }
209
210 /* next */
211 pPrev = pSession;
212 pSession = pSession->pNextHash;
213 }
214 }
215 }
216 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
217 if (!pSession)
218 {
219 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
220 return VERR_INVALID_PARAMETER;
221 }
222
223 /*
224 * Close the session.
225 */
226 supdrvCloseSession(&g_DevExt, pSession);
227 return 0;
228}
229
230
231DECLASM(int) VBoxDrvIOCtlFast(uint16_t sfn, uint8_t iFunction)
232{
233 /*
234 * Find the session.
235 */
236 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
237 const RTPROCESS Process = RTProcSelf();
238 const unsigned iHash = SESSION_HASH(sfn);
239 PSUPDRVSESSION pSession;
240
241 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
242 pSession = g_apSessionHashTab[iHash];
243 if (pSession && pSession->Process != Process)
244 {
245 do pSession = pSession->pNextHash;
246 while ( pSession
247 && ( pSession->sfn != sfn
248 || pSession->Process != Process));
249 }
250 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
251 if (RT_UNLIKELY(!pSession))
252 {
253 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
254 return VERR_INVALID_PARAMETER;
255 }
256
257 /*
258 * Dispatch the fast IOCtl.
259 */
260 supdrvIOCtlFast(iFunction, 0, &g_DevExt, pSession);
261 return 0;
262}
263
264
265DECLASM(int) VBoxDrvIOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void *pvParm, void *pvData, uint16_t *pcbParm, uint16_t *pcbData)
266{
267 /*
268 * Find the session.
269 */
270 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
271 const RTPROCESS Process = RTProcSelf();
272 const unsigned iHash = SESSION_HASH(sfn);
273 PSUPDRVSESSION pSession;
274
275 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
276 pSession = g_apSessionHashTab[iHash];
277 if (pSession && pSession->Process != Process)
278 {
279 do pSession = pSession->pNextHash;
280 while ( pSession
281 && ( pSession->sfn != sfn
282 || pSession->Process != Process));
283 }
284 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
285 if (!pSession)
286 {
287 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
288 return VERR_INVALID_PARAMETER;
289 }
290
291 /*
292 * Verify the category and dispatch the IOCtl.
293 */
294 if (RT_LIKELY(iCat == SUP_CTL_CATEGORY))
295 {
296 dprintf(("VBoxDrvIOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p *pcbParm=%d *pcbData=%d\n", pSession, iFunction, pvParm, pvData, *pcbParm, *pcbData));
297 Assert(pvParm);
298 Assert(!pvData);
299
300 /*
301 * Lock the header.
302 */
303 PSUPREQHDR pHdr = (PSUPREQHDR)pvParm;
304 AssertReturn(*pcbParm == sizeof(*pHdr), VERR_INVALID_PARAMETER);
305 KernVMLock_t Lock;
306 int rc = KernVMLock(VMDHL_WRITE, pHdr, *pcbParm, &Lock, (KernPageList_t *)-1, NULL);
307 AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, *pcbParm, &Lock, rc), VERR_LOCK_FAILED);
308
309 /*
310 * Validate the header.
311 */
312 if (RT_LIKELY((pHdr->fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) == SUPREQHDR_FLAGS_MAGIC))
313 {
314 uint32_t cbReq = RT_MAX(pHdr->cbIn, pHdr->cbOut);
315 if (RT_LIKELY( pHdr->cbIn >= sizeof(*pHdr)
316 && pHdr->cbOut >= sizeof(*pHdr)
317 && cbReq <= _1M*16))
318 {
319 /*
320 * Lock the rest of the buffer if necessary.
321 */
322 if (((uintptr_t)pHdr & PAGE_OFFSET_MASK) + cbReq > PAGE_SIZE)
323 {
324 rc = KernVMUnlock(&Lock);
325 AssertMsgReturn(!rc, ("KernVMUnlock(Lock) -> %#x\n", rc), VERR_LOCK_FAILED);
326
327 rc = KernVMLock(VMDHL_WRITE, pHdr, cbReq, &Lock, (KernPageList_t *)-1, NULL);
328 AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, cbReq, &Lock, rc), VERR_LOCK_FAILED);
329 }
330
331 /*
332 * Process the IOCtl.
333 */
334 rc = supdrvIOCtl(iFunction, &g_DevExt, pSession, pHdr);
335 }
336 else
337 {
338 OSDBGPRINT(("VBoxDrvIOCtl: max(%#x,%#x); iCmd=%#x\n", pHdr->cbIn, pHdr->cbOut, iFunction));
339 rc = VERR_INVALID_PARAMETER;
340 }
341 }
342 else
343 {
344 OSDBGPRINT(("VBoxDrvIOCtl: bad magic fFlags=%#x; iCmd=%#x\n", pHdr->fFlags, iFunction));
345 rc = VERR_INVALID_PARAMETER;
346 }
347
348 /*
349 * Unlock and return.
350 */
351 int rc2 = KernVMUnlock(&Lock);
352 AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
353
354 dprintf2(("VBoxDrvIOCtl: returns %d\n", rc));
355 return rc;
356 }
357 return VERR_NOT_SUPPORTED;
358}
359
360
361void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession)
362{
363 NOREF(pObj);
364 NOREF(pSession);
365}
366
367
368bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc)
369{
370 NOREF(pObj);
371 NOREF(pSession);
372 NOREF(pszObjName);
373 NOREF(prc);
374 return false;
375}
376
377
378bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt)
379{
380 NOREF(pDevExt);
381 return false;
382}
383
384
385/**
386 * Callback for writing to the log buffer.
387 *
388 * @returns number of bytes written.
389 * @param pvArg Unused.
390 * @param pachChars Pointer to an array of utf-8 characters.
391 * @param cbChars Number of bytes in the character array pointed to by pachChars.
392 */
393static DECLCALLBACK(size_t) VBoxDrvLogOutput(void *pvArg, const char *pachChars, size_t cbChars)
394{
395 size_t cchWritten = 0;
396 while (cbChars-- > 0)
397 {
398 const uint16_t offLogHead = g_offLogHead;
399 const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
400 if (offLogHeadNext == g_offLogTail)
401 break; /* no */
402 g_szLog[offLogHead] = *pachChars++;
403 g_offLogHead = offLogHeadNext;
404 cchWritten++;
405 }
406 return cchWritten;
407}
408
409
410SUPR0DECL(int) SUPR0Printf(const char *pszFormat, ...)
411{
412 va_list va;
413
414#if 0 //def DEBUG_bird
415 va_start(va, pszFormat);
416 RTLogComPrintfV(pszFormat, va);
417 va_end(va);
418#endif
419
420 va_start(va, pszFormat);
421 int cch = RTLogFormatV(VBoxDrvLogOutput, NULL, pszFormat, va);
422 va_end(va);
423
424 return cch;
425}
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