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a09e091a JB |
1 | /* |
2 | * Abstraction of the AGP GART interface. | |
3 | * | |
4 | * This version is for Solaris. | |
5 | * | |
6 | * Copyright © 2000 VA Linux Systems, Inc. | |
7 | * Copyright © 2001 The XFree86 Project, Inc. | |
8 | */ | |
9 | /* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a | |
12 | * copy of this software and associated documentation files (the "Software"), | |
13 | * to deal in the Software without restriction, including without limitation | |
14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
15 | * and/or sell copies of the Software, and to permit persons to whom the | |
16 | * Software is furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice (including the next | |
19 | * paragraph) shall be included in all copies or substantial portions of the | |
20 | * Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
25 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
27 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
28 | * DEALINGS IN THE SOFTWARE. | |
29 | */ | |
30 | ||
31 | #ifdef HAVE_XORG_CONFIG_H | |
32 | #include <xorg-config.h> | |
33 | #endif | |
34 | ||
35 | #include <X11/X.h> | |
36 | #include "xf86.h" | |
37 | #include "xf86Priv.h" | |
38 | #include "xf86_OSlib.h" | |
39 | #include "xf86_OSproc.h" | |
40 | #include <unistd.h> | |
41 | #include <sys/ioccom.h> | |
42 | #include <sys/types.h> | |
43 | #include <fcntl.h> | |
44 | #include <sys/agpgart.h> | |
45 | ||
46 | /* AGP page size is independent of the host page size. */ | |
47 | #ifndef AGP_PAGE_SIZE | |
48 | #define AGP_PAGE_SIZE 4096 | |
49 | #endif | |
50 | ||
51 | static int gartFd = -1; | |
52 | static int acquiredScreen = -1; | |
53 | static Bool initDone = FALSE; | |
54 | ||
55 | /* | |
56 | * Close /dev/agpgart. This frees all associated memory allocated during | |
57 | * this server generation. | |
58 | */ | |
59 | Bool | |
60 | xf86GARTCloseScreen(int screenNum) | |
61 | { | |
62 | if (gartFd != -1) { | |
63 | close(gartFd); | |
64 | acquiredScreen = -1; | |
65 | gartFd = -1; | |
66 | initDone = FALSE; | |
67 | ||
68 | xf86DrvMsg(screenNum, X_INFO, | |
69 | "xf86GARTCloseScreen: device closed successfully\n"); | |
70 | ||
71 | } | |
72 | return TRUE; | |
73 | } | |
74 | ||
75 | /* | |
76 | * Open /dev/agpgart. Keep it open until xf86GARTCloseScreen is called. | |
77 | */ | |
78 | static Bool | |
79 | GARTInit(int screenNum) | |
80 | { | |
81 | if (initDone) | |
82 | return gartFd != -1; | |
83 | ||
84 | if (gartFd == -1) | |
85 | gartFd = open(AGP_DEVICE, O_RDWR); | |
86 | else | |
87 | return FALSE; | |
88 | ||
89 | if (gartFd == -1) { | |
90 | xf86DrvMsg(screenNum, X_ERROR, | |
91 | "GARTInit: Unable to open " AGP_DEVICE " (%s)\n", | |
92 | strerror(errno)); | |
93 | return FALSE; | |
94 | } | |
95 | ||
96 | initDone = TRUE; | |
97 | xf86DrvMsg(screenNum, X_INFO, | |
98 | "GARTInit: " AGP_DEVICE " opened successfully\n"); | |
99 | ||
100 | return TRUE; | |
101 | } | |
102 | ||
103 | Bool | |
104 | xf86AgpGARTSupported(void) | |
105 | { | |
106 | return (GARTInit(-1)); | |
107 | ||
108 | } | |
109 | ||
110 | AgpInfoPtr | |
111 | xf86GetAGPInfo(int screenNum) | |
112 | { | |
113 | agp_info_t agpinf; | |
114 | AgpInfoPtr info; | |
115 | ||
116 | if (!GARTInit(screenNum)) | |
117 | return NULL; | |
118 | ||
119 | if (ioctl(gartFd, AGPIOC_INFO, &agpinf) != 0) { | |
120 | xf86DrvMsg(screenNum, X_ERROR, | |
121 | "xf86GetAGPInfo: AGPIOC_INFO failed (%s)\n", | |
122 | strerror(errno)); | |
123 | return NULL; | |
124 | } | |
125 | ||
126 | if ((info = calloc(sizeof(AgpInfo), 1)) == NULL) { | |
127 | xf86DrvMsg(screenNum, X_ERROR, | |
128 | "xf86GetAGPInfo: Failed to allocate AgpInfo\n"); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | info->bridgeId = agpinf.agpi_devid; | |
133 | info->agpMode = agpinf.agpi_mode; | |
134 | info->base = agpinf.agpi_aperbase; | |
135 | info->size = agpinf.agpi_apersize; | |
136 | info->totalPages = (unsigned long) agpinf.agpi_pgtotal; | |
137 | info->systemPages = (unsigned long) agpinf.agpi_pgsystem; | |
138 | info->usedPages = (unsigned long) agpinf.agpi_pgused; | |
139 | ||
140 | return info; | |
141 | } | |
142 | ||
143 | Bool | |
144 | xf86AcquireGART(int screenNum) | |
145 | { | |
146 | ||
147 | if (!GARTInit(screenNum)) | |
148 | return FALSE; | |
149 | ||
150 | if (acquiredScreen != screenNum) { | |
151 | if (ioctl(gartFd, AGPIOC_ACQUIRE, 0) != 0) { | |
152 | xf86DrvMsg(screenNum, X_WARNING, | |
153 | "xf86AcquireGART: AGPIOC_ACQUIRE failed (%s)\n", | |
154 | strerror(errno)); | |
155 | return FALSE; | |
156 | } | |
157 | acquiredScreen = screenNum; | |
158 | xf86DrvMsg(screenNum, X_INFO, | |
159 | "xf86AcquireGART: AGPIOC_ACQUIRE succeeded\n"); | |
160 | } | |
161 | return TRUE; | |
162 | } | |
163 | ||
164 | Bool | |
165 | xf86ReleaseGART(int screenNum) | |
166 | { | |
167 | ||
168 | if (!GARTInit(screenNum)) | |
169 | return FALSE; | |
170 | ||
171 | if (acquiredScreen == screenNum) { | |
172 | /* | |
173 | * The FreeBSD agp driver removes allocations on release. | |
174 | * The Solaris driver doesn't. xf86ReleaseGART() is expected | |
175 | * to give up access to the GART, but not to remove any | |
176 | * allocations. | |
177 | */ | |
178 | ||
179 | if (ioctl(gartFd, AGPIOC_RELEASE, 0) != 0) { | |
180 | xf86DrvMsg(screenNum, X_WARNING, | |
181 | "xf86ReleaseGART: AGPIOC_RELEASE failed (%s)\n", | |
182 | strerror(errno)); | |
183 | return FALSE; | |
184 | } | |
185 | acquiredScreen = -1; | |
186 | xf86DrvMsg(screenNum, X_INFO, | |
187 | "xf86ReleaseGART: AGPIOC_RELEASE succeeded\n"); | |
188 | return TRUE; | |
189 | } | |
190 | return FALSE; | |
191 | } | |
192 | ||
193 | int | |
194 | xf86AllocateGARTMemory(int screenNum, unsigned long size, int type, | |
195 | unsigned long *physical) | |
196 | { | |
197 | agp_allocate_t alloc; | |
198 | int pages; | |
199 | ||
200 | /* | |
201 | * Allocates "size" bytes of GART memory (rounds up to the next | |
202 | * page multiple) or type "type". A handle (key) for the allocated | |
203 | * memory is returned. On error, the return value is -1. | |
204 | * "size" should be larger than 0, or AGPIOC_ALLOCATE ioctl will | |
205 | * return error. | |
206 | */ | |
207 | ||
208 | if (!GARTInit(screenNum) || (acquiredScreen != screenNum)) | |
209 | return -1; | |
210 | ||
211 | pages = (size / AGP_PAGE_SIZE); | |
212 | if (size % AGP_PAGE_SIZE != 0) | |
213 | pages++; | |
214 | ||
215 | alloc.agpa_pgcount = pages; | |
216 | alloc.agpa_type = type; | |
217 | ||
218 | if (ioctl(gartFd, AGPIOC_ALLOCATE, &alloc) != 0) { | |
219 | xf86DrvMsg(screenNum, X_WARNING, "xf86AllocateGARTMemory: " | |
220 | "allocation of %d pages failed\n\t(%s)\n", pages, | |
221 | strerror(errno)); | |
222 | return -1; | |
223 | } | |
224 | ||
225 | if (physical) | |
226 | *physical = (unsigned long) alloc.agpa_physical; | |
227 | ||
228 | return alloc.agpa_key; | |
229 | } | |
230 | ||
231 | Bool | |
232 | xf86DeallocateGARTMemory(int screenNum, int key) | |
233 | { | |
234 | if (!GARTInit(screenNum) || (acquiredScreen != screenNum)) | |
235 | return FALSE; | |
236 | ||
237 | if (ioctl(gartFd, AGPIOC_DEALLOCATE, (int *) (uintptr_t) key) != 0) { | |
238 | xf86DrvMsg(screenNum, X_WARNING, "xf86DeAllocateGARTMemory: " | |
239 | "deallocation of gart memory with key %d failed\n" | |
240 | "\t(%s)\n", key, strerror(errno)); | |
241 | return FALSE; | |
242 | } | |
243 | ||
244 | return TRUE; | |
245 | } | |
246 | ||
247 | /* Bind GART memory with "key" at "offset" */ | |
248 | Bool | |
249 | xf86BindGARTMemory(int screenNum, int key, unsigned long offset) | |
250 | { | |
251 | agp_bind_t bind; | |
252 | int pageOffset; | |
253 | ||
254 | if (!GARTInit(screenNum) || (acquiredScreen != screenNum)) | |
255 | return FALSE; | |
256 | ||
257 | if (offset % AGP_PAGE_SIZE != 0) { | |
258 | xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: " | |
259 | "offset (0x%lx) is not page-aligned (%d)\n", | |
260 | offset, AGP_PAGE_SIZE); | |
261 | return FALSE; | |
262 | } | |
263 | pageOffset = offset / AGP_PAGE_SIZE; | |
264 | ||
265 | xf86DrvMsgVerb(screenNum, X_INFO, 3, | |
266 | "xf86BindGARTMemory: bind key %d at 0x%08lx " | |
267 | "(pgoffset %d)\n", key, offset, pageOffset); | |
268 | ||
269 | bind.agpb_pgstart = pageOffset; | |
270 | bind.agpb_key = key; | |
271 | ||
272 | if (ioctl(gartFd, AGPIOC_BIND, &bind) != 0) { | |
273 | xf86DrvMsg(screenNum, X_WARNING, "xf86BindGARTMemory: " | |
274 | "binding of gart memory with key %d\n" | |
275 | "\tat offset 0x%lx failed (%s)\n", | |
276 | key, offset, strerror(errno)); | |
277 | return FALSE; | |
278 | } | |
279 | ||
280 | return TRUE; | |
281 | } | |
282 | ||
283 | /* Unbind GART memory with "key" */ | |
284 | Bool | |
285 | xf86UnbindGARTMemory(int screenNum, int key) | |
286 | { | |
287 | agp_unbind_t unbind; | |
288 | ||
289 | if (!GARTInit(screenNum) || (acquiredScreen != screenNum)) | |
290 | return FALSE; | |
291 | ||
292 | unbind.agpu_pri = 0; | |
293 | unbind.agpu_key = key; | |
294 | ||
295 | if (ioctl(gartFd, AGPIOC_UNBIND, &unbind) != 0) { | |
296 | xf86DrvMsg(screenNum, X_WARNING, "xf86UnbindGARTMemory: " | |
297 | "unbinding of gart memory with key %d " | |
298 | "failed (%s)\n", key, strerror(errno)); | |
299 | return FALSE; | |
300 | } | |
301 | ||
302 | xf86DrvMsgVerb(screenNum, X_INFO, 3, | |
303 | "xf86UnbindGARTMemory: unbind key %d\n", key); | |
304 | ||
305 | return TRUE; | |
306 | } | |
307 | ||
308 | /* XXX Interface may change. */ | |
309 | Bool | |
310 | xf86EnableAGP(int screenNum, CARD32 mode) | |
311 | { | |
312 | agp_setup_t setup; | |
313 | ||
314 | if (!GARTInit(screenNum) || (acquiredScreen != screenNum)) | |
315 | return FALSE; | |
316 | ||
317 | setup.agps_mode = mode; | |
318 | if (ioctl(gartFd, AGPIOC_SETUP, &setup) != 0) { | |
319 | xf86DrvMsg(screenNum, X_WARNING, "xf86EnableAGP: " | |
320 | "AGPIOC_SETUP with mode %x failed (%s)\n", | |
321 | (unsigned int) mode, strerror(errno)); | |
322 | return FALSE; | |
323 | } | |
324 | ||
325 | return TRUE; | |
326 | } |