VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/os2/SUPDrv-os2.cpp@ 4935

Last change on this file since 4935 was 4935, checked in by vboxsync, 17 years ago

build fixes / warnings.
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1/* $Id: SUPDrv-os2.cpp 4935 2007-09-20 14:53:38Z vboxsync $ */
2/** @file
3 * VBoxDrv - OS/2 specifics.
4 */
5
6/*
7 * Copyright (c) 2007 knut st. osmundsen <[email protected]>
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/*******************************************************************************
33* Header Files *
34*******************************************************************************/
35#define __STDC_CONSTANT_MACROS
36#define __STDC_LIMIT_MACROS
37
38#include <os2ddk/bsekee.h>
39#undef RT_MAX
40
41#include "SUPDRV.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 <iprt/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 innotek GmbH\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=%Vrc\n", rc);
133 supdrvDeleteDevExt(&g_DevExt);
134 }
135 else
136 g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: supdrvInitDevExt failed, rc=%Vrc\n", rc);
137 RTR0Term();
138 }
139 else
140 g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: RTR0Init failed, rc=%Vrc\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, &pSession);
154 if (RT_SUCCESS(rc))
155 {
156 pSession->Process = RTProcSelf();
157 pSession->R0Process = RTR0ProcHandleSelf();
158 pSession->sfn = sfn;
159
160 /*
161 * Insert it into the hash table.
162 */
163 unsigned iHash = SESSION_HASH(sfn);
164 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
165 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
166 pSession->pNextHash = g_apSessionHashTab[iHash];
167 g_apSessionHashTab[iHash] = pSession;
168 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
169 }
170
171 dprintf(("VBoxDrvOpen: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
172 return rc;
173}
174
175
176DECLASM(int) VBoxDrvClose(uint16_t sfn)
177{
178 dprintf(("VBoxDrvClose: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
179
180 /*
181 * Remove from the hash table.
182 */
183 PSUPDRVSESSION pSession;
184 const RTPROCESS Process = RTProcSelf();
185 const unsigned iHash = SESSION_HASH(sfn);
186 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
187 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
188
189 pSession = g_apSessionHashTab[iHash];
190 if (pSession)
191 {
192 if ( pSession->sfn == sfn
193 && pSession->Process == Process)
194 {
195 g_apSessionHashTab[iHash] = pSession->pNextHash;
196 pSession->pNextHash = NULL;
197 }
198 else
199 {
200 PSUPDRVSESSION pPrev = pSession;
201 pSession = pSession->pNextHash;
202 while (pSession)
203 {
204 if ( pSession->sfn == sfn
205 && pSession->Process == Process)
206 {
207 pPrev->pNextHash = pSession->pNextHash;
208 pSession->pNextHash = NULL;
209 break;
210 }
211
212 /* next */
213 pPrev = pSession;
214 pSession = pSession->pNextHash;
215 }
216 }
217 }
218 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
219 if (!pSession)
220 {
221 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
222 return VERR_INVALID_PARAMETER;
223 }
224
225 /*
226 * Close the session.
227 */
228 supdrvCloseSession(&g_DevExt, pSession);
229 return 0;
230}
231
232
233DECLASM(int) VBoxDrvIOCtlFast(uint16_t sfn, uint8_t iFunction, int32_t *prc)
234{
235 /*
236 * Find the session.
237 */
238 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
239 const RTPROCESS Process = RTProcSelf();
240 const unsigned iHash = SESSION_HASH(sfn);
241 PSUPDRVSESSION pSession;
242
243 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
244 pSession = g_apSessionHashTab[iHash];
245 if (pSession && pSession->Process != Process)
246 {
247 do pSession = pSession->pNextHash;
248 while ( pSession
249 && ( pSession->sfn != sfn
250 || pSession->Process != Process));
251 }
252 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
253 if (RT_UNLIKELY(!pSession))
254 {
255 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
256 return VERR_INVALID_PARAMETER;
257 }
258
259 /*
260 * Dispatch the fast IOCtl.
261 */
262 *prc = supdrvIOCtlFast(iFunction, &g_DevExt, pSession);
263 return 0;
264}
265
266
267DECLASM(int) VBoxDrvIOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void *pvParm, void *pvData, uint16_t *pcbParm, uint16_t *pcbData)
268{
269 /*
270 * Find the session.
271 */
272 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
273 const RTPROCESS Process = RTProcSelf();
274 const unsigned iHash = SESSION_HASH(sfn);
275 PSUPDRVSESSION pSession;
276
277 RTSpinlockAcquireNoInts(g_Spinlock, &Tmp);
278 pSession = g_apSessionHashTab[iHash];
279 if (pSession && pSession->Process != Process)
280 {
281 do pSession = pSession->pNextHash;
282 while ( pSession
283 && ( pSession->sfn != sfn
284 || pSession->Process != Process));
285 }
286 RTSpinlockReleaseNoInts(g_Spinlock, &Tmp);
287 if (!pSession)
288 {
289 OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
290 return VERR_INVALID_PARAMETER;
291 }
292
293 /*
294 * Verify the category and dispatch the IOCtl.
295 */
296 if (RT_LIKELY(iCat == SUP_CTL_CATEGORY))
297 {
298 dprintf(("VBoxDrvIOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p *pcbParm=%d *pcbData=%d\n", pSession, iFunction, pvParm, pvData, *pcbParm, *pcbData));
299 Assert(pvParm);
300 Assert(!pvData);
301
302 /*
303 * Lock the header.
304 */
305 PSUPREQHDR pHdr = (PSUPREQHDR)pvParm;
306 AssertReturn(*pcbParm == sizeof(*pHdr), VERR_INVALID_PARAMETER);
307 KernVMLock_t Lock;
308 int rc = KernVMLock(VMDHL_WRITE, pHdr, *pcbParm, &Lock, (KernPageList_t *)-1, NULL);
309 AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, *pcbParm, &Lock, rc), VERR_LOCK_FAILED);
310
311 /*
312 * Validate the header.
313 */
314 if (RT_LIKELY((pHdr->fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) == SUPREQHDR_FLAGS_MAGIC))
315 {
316 uint32_t cbReq = RT_MAX(pHdr->cbIn, pHdr->cbOut);
317 if (RT_LIKELY( pHdr->cbIn >= sizeof(*pHdr)
318 && pHdr->cbOut >= sizeof(*pHdr)
319 && cbReq <= _1M*16))
320 {
321 /*
322 * Lock the rest of the buffer if necessary.
323 */
324 if (((uintptr_t)pHdr & PAGE_OFFSET_MASK) + cbReq > PAGE_SIZE)
325 {
326 rc = KernVMUnlock(&Lock);
327 AssertMsgReturn(!rc, ("KernVMUnlock(Lock) -> %#x\n", rc), VERR_LOCK_FAILED);
328
329 rc = KernVMLock(VMDHL_WRITE, pHdr, cbReq, &Lock, (KernPageList_t *)-1, NULL);
330 AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, cbReq, &Lock, rc), VERR_LOCK_FAILED);
331 }
332
333 /*
334 * Process the IOCtl.
335 */
336 rc = supdrvIOCtl(iFunction, &g_DevExt, pSession, pHdr);
337 }
338 else
339 {
340 OSDBGPRINT(("VBoxDrvIOCtl: max(%#x,%#x); iCmd=%#x\n", pHdr->cbIn, pHdr->cbOut, iFunction));
341 rc = VERR_INVALID_PARAMETER;
342 }
343 }
344 else
345 {
346 OSDBGPRINT(("VBoxDrvIOCtl: bad magic fFlags=%#x; iCmd=%#x\n", pHdr->fFlags, iFunction));
347 rc = VERR_INVALID_PARAMETER;
348 }
349
350 /*
351 * Unlock and return.
352 */
353 int rc2 = KernVMUnlock(&Lock);
354 AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
355
356 dprintf2(("VBoxDrvIOCtl: returns %d\n", rc));
357 return rc;
358 }
359 return VERR_NOT_SUPPORTED;
360}
361
362
363void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession)
364{
365 NOREF(pObj);
366 NOREF(pSession);
367}
368
369
370bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc)
371{
372 NOREF(pObj);
373 NOREF(pSession);
374 NOREF(pszObjName);
375 NOREF(prc);
376 return false;
377}
378
379
380/**
381 * Callback for writing to the log buffer.
382 *
383 * @returns number of bytes written.
384 * @param pvArg Unused.
385 * @param pachChars Pointer to an array of utf-8 characters.
386 * @param cbChars Number of bytes in the character array pointed to by pachChars.
387 */
388static DECLCALLBACK(size_t) VBoxDrvLogOutput(void *pvArg, const char *pachChars, size_t cbChars)
389{
390 size_t cchWritten = 0;
391 while (cbChars-- > 0)
392 {
393 const uint16_t offLogHead = g_offLogHead;
394 const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
395 if (offLogHeadNext == g_offLogTail)
396 break; /* no */
397 g_szLog[offLogHead] = *pachChars++;
398 g_offLogHead = offLogHeadNext;
399 cchWritten++;
400 }
401 return cchWritten;
402}
403
404
405SUPR0DECL(int) SUPR0Printf(const char *pszFormat, ...)
406{
407 va_list va;
408
409#if 0 //def DEBUG_bird
410 va_start(va, pszFormat);
411 RTLogComPrintfV(pszFormat, va);
412 va_end(va);
413#endif
414
415 va_start(va, pszFormat);
416 int cch = RTLogFormatV(VBoxDrvLogOutput, NULL, pszFormat, va);
417 va_end(va);
418
419 return cch;
420}
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