DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / dev / agp / agp.c
CommitLineData
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1/*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
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26 * $FreeBSD: src/sys/dev/agp/agp.c,v 1.58 2007/11/12 21:51:36 jhb Exp $
27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.30 2008/01/07 01:34:58 corecode Exp $
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28 */
29
30#include "opt_bus.h"
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31
32#include <sys/param.h>
33#include <sys/systm.h>
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34#include <sys/device.h>
35#include <sys/conf.h>
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36#include <sys/malloc.h>
37#include <sys/kernel.h>
38#include <sys/bus.h>
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39#include <sys/agpio.h>
40#include <sys/lock.h>
41#include <sys/proc.h>
1f7ab7c9 42#include <sys/rman.h>
984263bc 43
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44#include <bus/pci/pcivar.h>
45#include <bus/pci/pcireg.h>
46#include "agppriv.h"
47#include "agpvar.h"
48#include "agpreg.h"
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49
50#include <vm/vm.h>
51#include <vm/vm_object.h>
52#include <vm/vm_page.h>
53#include <vm/vm_pageout.h>
54#include <vm/pmap.h>
55
56#include <machine/md_var.h>
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57
58MODULE_VERSION(agp, 1);
59
60MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
61
62#define CDEV_MAJOR 148
63 /* agp_drv.c */
64static d_open_t agp_open;
65static d_close_t agp_close;
66static d_ioctl_t agp_ioctl;
67static d_mmap_t agp_mmap;
68
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69static struct dev_ops agp_ops = {
70 { "agp", CDEV_MAJOR, D_TTY },
71 .d_open = agp_open,
72 .d_close = agp_close,
73 .d_ioctl = agp_ioctl,
74 .d_mmap = agp_mmap,
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75};
76
77static devclass_t agp_devclass;
78#define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
79
80/* Helper functions for implementing chipset mini drivers. */
81
82void
c436375a 83agp_flush_cache(void)
984263bc 84{
fdc3c5be 85#if defined(__i386__) || defined(__amd64__)
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86 wbinvd();
87#endif
88}
89
90u_int8_t
91agp_find_caps(device_t dev)
92{
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93 int capreg;
94
95 if (pci_find_extcap(dev, PCIY_AGP, &capreg) != 0)
96 capreg = 0;
97 return (capreg);
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98}
99
100/*
101 * Find an AGP display device (if any).
102 */
103static device_t
104agp_find_display(void)
105{
106 devclass_t pci = devclass_find("pci");
107 device_t bus, dev = 0;
108 device_t *kids;
109 int busnum, numkids, i;
110
111 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
112 bus = devclass_get_device(pci, busnum);
113 if (!bus)
114 continue;
115 device_get_children(bus, &kids, &numkids);
116 for (i = 0; i < numkids; i++) {
117 dev = kids[i];
118 if (pci_get_class(dev) == PCIC_DISPLAY
119 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
120 if (agp_find_caps(dev)) {
efda3bd0 121 kfree(kids, M_TEMP);
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122 return dev;
123 }
124
125 }
efda3bd0 126 kfree(kids, M_TEMP);
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127 }
128
129 return 0;
130}
131
132struct agp_gatt *
133agp_alloc_gatt(device_t dev)
134{
135 u_int32_t apsize = AGP_GET_APERTURE(dev);
136 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
137 struct agp_gatt *gatt;
138
139 if (bootverbose)
140 device_printf(dev,
141 "allocating GATT for aperture of size %dM\n",
142 apsize / (1024*1024));
143
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144 if (entries == 0) {
145 device_printf(dev, "bad aperture size\n");
146 return NULL;
147 }
148
efda3bd0 149 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
984263bc 150 gatt->ag_entries = entries;
fdc3c5be 151 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
e7b4468c 152 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
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153 if (!gatt->ag_virtual) {
154 if (bootverbose)
155 device_printf(dev, "contiguous allocation failed\n");
efda3bd0 156 kfree(gatt, M_AGP);
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157 return 0;
158 }
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159 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
160 agp_flush_cache();
161
162 return gatt;
163}
164
165void
166agp_free_gatt(struct agp_gatt *gatt)
167{
168 contigfree(gatt->ag_virtual,
169 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
efda3bd0 170 kfree(gatt, M_AGP);
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171}
172
fdc3c5be 173static u_int agp_max[][2] = {
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174 {0, 0},
175 {32, 4},
176 {64, 28},
177 {128, 96},
178 {256, 204},
179 {512, 440},
180 {1024, 942},
181 {2048, 1920},
182 {4096, 3932}
183};
184#define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
185
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186/**
187 * Sets the PCI resource which represents the AGP aperture.
188 *
189 * If not called, the default AGP aperture resource of AGP_APBASE will
190 * be used. Must be called before agp_generic_attach().
191 */
192void
193agp_set_aperture_resource(device_t dev, int rid)
194{
195 struct agp_softc *sc = device_get_softc(dev);
196
197 sc->as_aperture_rid = rid;
198}
199
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200int
201agp_generic_attach(device_t dev)
202{
203 struct agp_softc *sc = device_get_softc(dev);
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204 int i;
205 u_int memsize;
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206
207 /*
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208 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
209 * because the kernel doesn't need to map it.
984263bc 210 */
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211 if (sc->as_aperture_rid == 0)
212 sc->as_aperture_rid = AGP_APBASE;
213
214 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
215 &sc->as_aperture_rid, RF_SHAREABLE);
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216 if (!sc->as_aperture)
217 return ENOMEM;
218
219 /*
220 * Work out an upper bound for agp memory allocation. This
221 * uses a heurisitc table from the Linux driver.
222 */
223 memsize = ptoa(Maxmem) >> 20;
224 for (i = 0; i < agp_max_size; i++) {
225 if (memsize <= agp_max[i][0])
226 break;
227 }
228 if (i == agp_max_size) i = agp_max_size - 1;
229 sc->as_maxmem = agp_max[i][1] << 20U;
230
231 /*
232 * The lock is used to prevent re-entry to
233 * agp_generic_bind_memory() since that function can sleep.
234 */
f2770c70 235 lockinit(&sc->as_lock, "agplk", 0, 0);
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236
237 /*
238 * Initialise stuff for the userland device.
239 */
240 agp_devclass = devclass_find("agp");
241 TAILQ_INIT(&sc->as_memory);
242 sc->as_nextid = 1;
243
fef8985e 244 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
3e82b46c 245 0600, "agpgart");
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246
247 return 0;
248}
249
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250void
251agp_free_cdev(device_t dev)
252{
cd29885a 253 dev_ops_remove_minor(&agp_ops, device_get_unit(dev));
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254}
255
256void
257agp_free_res(device_t dev)
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258{
259 struct agp_softc *sc = device_get_softc(dev);
f21c8116 260
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261 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
262 sc->as_aperture);
984263bc 263 agp_flush_cache();
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264}
265
266int
267agp_generic_detach(device_t dev)
268{
269 agp_free_cdev(dev);
270 agp_free_res(dev);
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271 return 0;
272}
273
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274/**
275 * Default AGP aperture size detection which simply returns the size of
276 * the aperture's PCI resource.
277 */
278int
279agp_generic_get_aperture(device_t dev)
280{
281 struct agp_softc *sc = device_get_softc(dev);
282
283 return rman_get_size(sc->as_aperture);
284}
285
286/**
287 * Default AGP aperture size setting function, which simply doesn't allow
288 * changes to resource size.
289 */
290int
291agp_generic_set_aperture(device_t dev, u_int32_t aperture)
292{
293 u_int32_t current_aperture;
294
295 current_aperture = AGP_GET_APERTURE(dev);
296 if (current_aperture != aperture)
297 return EINVAL;
298 else
299 return 0;
300}
301
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302/*
303 * This does the enable logic for v3, with the same topology
304 * restrictions as in place for v2 -- one bus, one device on the bus.
305 */
306static int
307agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
984263bc 308{
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309 u_int32_t tstatus, mstatus;
310 u_int32_t command;
f7841f3c 311 int rq, sba, fw, rate, arqsz, cal;
984263bc 312
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313 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
314 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
315
316 /* Set RQ to the min of mode, tstatus and mstatus */
317 rq = AGP_MODE_GET_RQ(mode);
318 if (AGP_MODE_GET_RQ(tstatus) < rq)
319 rq = AGP_MODE_GET_RQ(tstatus);
320 if (AGP_MODE_GET_RQ(mstatus) < rq)
321 rq = AGP_MODE_GET_RQ(mstatus);
322
323 /*
324 * ARQSZ - Set the value to the maximum one.
325 * Don't allow the mode register to override values.
326 */
327 arqsz = AGP_MODE_GET_ARQSZ(mode);
328 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
329 rq = AGP_MODE_GET_ARQSZ(tstatus);
330 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
331 rq = AGP_MODE_GET_ARQSZ(mstatus);
332
333 /* Calibration cycle - don't allow override by mode register */
334 cal = AGP_MODE_GET_CAL(tstatus);
335 if (AGP_MODE_GET_CAL(mstatus) < cal)
336 cal = AGP_MODE_GET_CAL(mstatus);
337
338 /* SBA must be supported for AGP v3. */
339 sba = 1;
340
341 /* Set FW if all three support it. */
342 fw = (AGP_MODE_GET_FW(tstatus)
343 & AGP_MODE_GET_FW(mstatus)
344 & AGP_MODE_GET_FW(mode));
345
346 /* Figure out the max rate */
347 rate = (AGP_MODE_GET_RATE(tstatus)
348 & AGP_MODE_GET_RATE(mstatus)
349 & AGP_MODE_GET_RATE(mode));
350 if (rate & AGP_MODE_V3_RATE_8x)
351 rate = AGP_MODE_V3_RATE_8x;
352 else
353 rate = AGP_MODE_V3_RATE_4x;
354 if (bootverbose)
355 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
356
357 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
358
359 /* Construct the new mode word and tell the hardware */
fdc3c5be 360 command = 0;
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361 command = AGP_MODE_SET_RQ(0, rq);
362 command = AGP_MODE_SET_ARQSZ(command, arqsz);
363 command = AGP_MODE_SET_CAL(command, cal);
364 command = AGP_MODE_SET_SBA(command, sba);
365 command = AGP_MODE_SET_FW(command, fw);
366 command = AGP_MODE_SET_RATE(command, rate);
fdc3c5be 367 command = AGP_MODE_SET_MODE_3(command, 1);
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368 command = AGP_MODE_SET_AGP(command, 1);
369 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
370 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
371
372 return 0;
373}
374
375static int
376agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
377{
378 u_int32_t tstatus, mstatus;
379 u_int32_t command;
380 int rq, sba, fw, rate;
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381
382 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
383 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
384
385 /* Set RQ to the min of mode, tstatus and mstatus */
386 rq = AGP_MODE_GET_RQ(mode);
387 if (AGP_MODE_GET_RQ(tstatus) < rq)
388 rq = AGP_MODE_GET_RQ(tstatus);
389 if (AGP_MODE_GET_RQ(mstatus) < rq)
390 rq = AGP_MODE_GET_RQ(mstatus);
391
392 /* Set SBA if all three can deal with SBA */
393 sba = (AGP_MODE_GET_SBA(tstatus)
394 & AGP_MODE_GET_SBA(mstatus)
395 & AGP_MODE_GET_SBA(mode));
396
397 /* Similar for FW */
398 fw = (AGP_MODE_GET_FW(tstatus)
399 & AGP_MODE_GET_FW(mstatus)
400 & AGP_MODE_GET_FW(mode));
401
402 /* Figure out the max rate */
403 rate = (AGP_MODE_GET_RATE(tstatus)
404 & AGP_MODE_GET_RATE(mstatus)
405 & AGP_MODE_GET_RATE(mode));
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406 if (rate & AGP_MODE_V2_RATE_4x)
407 rate = AGP_MODE_V2_RATE_4x;
408 else if (rate & AGP_MODE_V2_RATE_2x)
409 rate = AGP_MODE_V2_RATE_2x;
984263bc 410 else
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411 rate = AGP_MODE_V2_RATE_1x;
412 if (bootverbose)
413 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
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414
415 /* Construct the new mode word and tell the hardware */
fdc3c5be 416 command = 0;
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417 command = AGP_MODE_SET_RQ(0, rq);
418 command = AGP_MODE_SET_SBA(command, sba);
419 command = AGP_MODE_SET_FW(command, fw);
420 command = AGP_MODE_SET_RATE(command, rate);
421 command = AGP_MODE_SET_AGP(command, 1);
422 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
423 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
424
425 return 0;
426}
427
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428int
429agp_generic_enable(device_t dev, u_int32_t mode)
430{
431 device_t mdev = agp_find_display();
432 u_int32_t tstatus, mstatus;
433
434 if (!mdev) {
435 AGP_DPF("can't find display\n");
436 return ENXIO;
437 }
438
439 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
440 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
441
442 /*
443 * Check display and bridge for AGP v3 support. AGP v3 allows
444 * more variety in topology than v2, e.g. multiple AGP devices
445 * attached to one bridge, or multiple AGP bridges in one
446 * system. This doesn't attempt to address those situations,
447 * but should work fine for a classic single AGP slot system
448 * with AGP v3.
449 */
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450 if (AGP_MODE_GET_MODE_3(mode) &&
451 AGP_MODE_GET_MODE_3(tstatus) &&
452 AGP_MODE_GET_MODE_3(mstatus))
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453 return (agp_v3_enable(dev, mdev, mode));
454 else
455 return (agp_v2_enable(dev, mdev, mode));
456}
457
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458struct agp_memory *
459agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
460{
461 struct agp_softc *sc = device_get_softc(dev);
462 struct agp_memory *mem;
463
464 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
465 return 0;
466
467 if (sc->as_allocated + size > sc->as_maxmem)
468 return 0;
469
470 if (type != 0) {
e3869ec7 471 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
fdc3c5be 472 type);
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473 return 0;
474 }
475
efda3bd0 476 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
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477 mem->am_id = sc->as_nextid++;
478 mem->am_size = size;
479 mem->am_type = 0;
480 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
481 mem->am_physical = 0;
482 mem->am_offset = 0;
483 mem->am_is_bound = 0;
484 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
485 sc->as_allocated += size;
486
487 return mem;
488}
489
490int
491agp_generic_free_memory(device_t dev, struct agp_memory *mem)
492{
493 struct agp_softc *sc = device_get_softc(dev);
494
495 if (mem->am_is_bound)
496 return EBUSY;
497
498 sc->as_allocated -= mem->am_size;
499 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
500 vm_object_deallocate(mem->am_obj);
efda3bd0 501 kfree(mem, M_AGP);
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502 return 0;
503}
504
505int
506agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
507 vm_offset_t offset)
508{
509 struct agp_softc *sc = device_get_softc(dev);
510 vm_offset_t i, j, k;
511 vm_page_t m;
512 int error;
513
df4f70a6 514 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
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515
516 if (mem->am_is_bound) {
517 device_printf(dev, "memory already bound\n");
df4f70a6 518 lockmgr(&sc->as_lock, LK_RELEASE);
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519 return EINVAL;
520 }
521
522 if (offset < 0
523 || (offset & (AGP_PAGE_SIZE - 1)) != 0
524 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
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525 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
526 (int) offset, (int)mem->am_size,
527 (int)AGP_GET_APERTURE(dev));
e3869ec7 528 kprintf("Check BIOS's aperature size vs X\n");
df4f70a6 529 lockmgr(&sc->as_lock, LK_RELEASE);
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530 return EINVAL;
531 }
532
533 /*
534 * Bind the individual pages and flush the chipset's
535 * TLB.
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536 */
537 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
538 /*
539 * Find a page from the object and wire it
540 * down. This page will be mapped using one or more
541 * entries in the GATT (assuming that PAGE_SIZE >=
542 * AGP_PAGE_SIZE. If this is the first call to bind,
543 * the pages will be allocated and zeroed.
544 */
545 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
dc1fd4b3 546 VM_ALLOC_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
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547 if ((m->flags & PG_ZERO) == 0)
548 vm_page_zero_fill(m);
549 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
550 vm_page_wire(m);
551
552 /*
553 * Install entries in the GATT, making sure that if
554 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
555 * aligned to PAGE_SIZE, we don't modify too many GATT
556 * entries.
557 */
558 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
559 j += AGP_PAGE_SIZE) {
560 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
561 AGP_DPF("binding offset %#x to pa %#x\n",
562 offset + i + j, pa);
563 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
564 if (error) {
565 /*
566 * Bail out. Reverse all the mappings
567 * and unwire the pages.
568 */
569 vm_page_wakeup(m);
570 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
571 AGP_UNBIND_PAGE(dev, offset + k);
572 for (k = 0; k <= i; k += PAGE_SIZE) {
573 m = vm_page_lookup(mem->am_obj,
574 OFF_TO_IDX(k));
575 vm_page_unwire(m, 0);
576 }
df4f70a6 577 lockmgr(&sc->as_lock, LK_RELEASE);
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578 return error;
579 }
580 }
581 vm_page_wakeup(m);
582 }
583
584 /*
585 * Flush the cpu cache since we are providing a new mapping
586 * for these pages.
587 */
588 agp_flush_cache();
589
590 /*
591 * Make sure the chipset gets the new mappings.
592 */
593 AGP_FLUSH_TLB(dev);
594
595 mem->am_offset = offset;
596 mem->am_is_bound = 1;
597
df4f70a6 598 lockmgr(&sc->as_lock, LK_RELEASE);
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599
600 return 0;
601}
602
603int
604agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
605{
606 struct agp_softc *sc = device_get_softc(dev);
607 vm_page_t m;
608 int i;
609
df4f70a6 610 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
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611
612 if (!mem->am_is_bound) {
613 device_printf(dev, "memory is not bound\n");
df4f70a6 614 lockmgr(&sc->as_lock, LK_RELEASE);
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615 return EINVAL;
616 }
617
618
619 /*
620 * Unbind the individual pages and flush the chipset's
621 * TLB. Unwire the pages so they can be swapped.
622 */
623 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
624 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
625 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
626 m = vm_page_lookup(mem->am_obj, atop(i));
627 vm_page_unwire(m, 0);
628 }
629
630 agp_flush_cache();
631 AGP_FLUSH_TLB(dev);
632
633 mem->am_offset = 0;
634 mem->am_is_bound = 0;
635
df4f70a6 636 lockmgr(&sc->as_lock, LK_RELEASE);
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637
638 return 0;
639}
640
641/* Helper functions for implementing user/kernel api */
642
643static int
644agp_acquire_helper(device_t dev, enum agp_acquire_state state)
645{
646 struct agp_softc *sc = device_get_softc(dev);
647
648 if (sc->as_state != AGP_ACQUIRE_FREE)
649 return EBUSY;
650 sc->as_state = state;
651
652 return 0;
653}
654
655static int
656agp_release_helper(device_t dev, enum agp_acquire_state state)
657{
658 struct agp_softc *sc = device_get_softc(dev);
659
660 if (sc->as_state == AGP_ACQUIRE_FREE)
661 return 0;
662
663 if (sc->as_state != state)
664 return EBUSY;
665
666 sc->as_state = AGP_ACQUIRE_FREE;
667 return 0;
668}
669
670static struct agp_memory *
671agp_find_memory(device_t dev, int id)
672{
673 struct agp_softc *sc = device_get_softc(dev);
674 struct agp_memory *mem;
675
676 AGP_DPF("searching for memory block %d\n", id);
677 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
678 AGP_DPF("considering memory block %d\n", mem->am_id);
679 if (mem->am_id == id)
680 return mem;
681 }
682 return 0;
683}
684
685/* Implementation of the userland ioctl api */
686
687static int
688agp_info_user(device_t dev, agp_info *info)
689{
690 struct agp_softc *sc = device_get_softc(dev);
691
692 bzero(info, sizeof *info);
693 info->bridge_id = pci_get_devid(dev);
694 info->agp_mode =
695 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
696 info->aper_base = rman_get_start(sc->as_aperture);
697 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
698 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
699 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
700
701 return 0;
702}
703
704static int
705agp_setup_user(device_t dev, agp_setup *setup)
706{
707 return AGP_ENABLE(dev, setup->agp_mode);
708}
709
710static int
711agp_allocate_user(device_t dev, agp_allocate *alloc)
712{
713 struct agp_memory *mem;
714
715 mem = AGP_ALLOC_MEMORY(dev,
716 alloc->type,
717 alloc->pg_count << AGP_PAGE_SHIFT);
718 if (mem) {
719 alloc->key = mem->am_id;
720 alloc->physical = mem->am_physical;
721 return 0;
722 } else {
723 return ENOMEM;
724 }
725}
726
727static int
728agp_deallocate_user(device_t dev, int id)
729{
fc6d0222 730 struct agp_memory *mem = agp_find_memory(dev, id);
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731
732 if (mem) {
733 AGP_FREE_MEMORY(dev, mem);
734 return 0;
735 } else {
736 return ENOENT;
737 }
738}
739
740static int
741agp_bind_user(device_t dev, agp_bind *bind)
742{
743 struct agp_memory *mem = agp_find_memory(dev, bind->key);
744
745 if (!mem)
746 return ENOENT;
747
748 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
749}
750
751static int
752agp_unbind_user(device_t dev, agp_unbind *unbind)
753{
754 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
755
756 if (!mem)
757 return ENOENT;
758
759 return AGP_UNBIND_MEMORY(dev, mem);
760}
761
762static int
fef8985e 763agp_open(struct dev_open_args *ap)
984263bc 764{
b13267a5 765 cdev_t kdev = ap->a_head.a_dev;
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766 device_t dev = KDEV2DEV(kdev);
767 struct agp_softc *sc = device_get_softc(dev);
768
769 if (!sc->as_isopen) {
770 sc->as_isopen = 1;
771 device_busy(dev);
772 }
773
774 return 0;
775}
776
777static int
fef8985e 778agp_close(struct dev_close_args *ap)
984263bc 779{
b13267a5 780 cdev_t kdev = ap->a_head.a_dev;
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781 device_t dev = KDEV2DEV(kdev);
782 struct agp_softc *sc = device_get_softc(dev);
783 struct agp_memory *mem;
784
785 /*
786 * Clear the GATT and force release on last close
787 */
788 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
789 if (mem->am_is_bound)
790 AGP_UNBIND_MEMORY(dev, mem);
791 AGP_FREE_MEMORY(dev, mem);
792 }
793 if (sc->as_state == AGP_ACQUIRE_USER)
794 agp_release_helper(dev, AGP_ACQUIRE_USER);
795 sc->as_isopen = 0;
796 device_unbusy(dev);
797
798 return 0;
799}
800
801static int
fef8985e 802agp_ioctl(struct dev_ioctl_args *ap)
984263bc 803{
b13267a5 804 cdev_t kdev = ap->a_head.a_dev;
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805 device_t dev = KDEV2DEV(kdev);
806
fef8985e 807 switch (ap->a_cmd) {
984263bc 808 case AGPIOC_INFO:
fef8985e 809 return agp_info_user(dev, (agp_info *)ap->a_data);
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810
811 case AGPIOC_ACQUIRE:
812 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
813
814 case AGPIOC_RELEASE:
815 return agp_release_helper(dev, AGP_ACQUIRE_USER);
816
817 case AGPIOC_SETUP:
fef8985e 818 return agp_setup_user(dev, (agp_setup *)ap->a_data);
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819
820 case AGPIOC_ALLOCATE:
fef8985e 821 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
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822
823 case AGPIOC_DEALLOCATE:
fef8985e 824 return agp_deallocate_user(dev, *(int *)ap->a_data);
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825
826 case AGPIOC_BIND:
fef8985e 827 return agp_bind_user(dev, (agp_bind *)ap->a_data);
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828
829 case AGPIOC_UNBIND:
fef8985e 830 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
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831
832 }
833
834 return EINVAL;
835}
836
837static int
fef8985e 838agp_mmap(struct dev_mmap_args *ap)
984263bc 839{
b13267a5 840 cdev_t kdev = ap->a_head.a_dev;
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841 device_t dev = KDEV2DEV(kdev);
842 struct agp_softc *sc = device_get_softc(dev);
843
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844 if (ap->a_offset > AGP_GET_APERTURE(dev))
845 return EINVAL;
846 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
fdc3c5be 847 return 0;
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848}
849
850/* Implementation of the kernel api */
851
852device_t
c436375a 853agp_find_device(void)
984263bc 854{
fdc3c5be
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855 device_t *children, child;
856 int i, count;
857
984263bc 858 if (!agp_devclass)
fdc3c5be
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859 return NULL;
860 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
861 return NULL;
862 child = NULL;
863 for (i = 0; i < count; i++) {
864 if (device_is_attached(children[i])) {
865 child = children[i];
866 break;
867 }
868 }
869 kfree(children, M_TEMP);
870 return child;
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871}
872
873enum agp_acquire_state
874agp_state(device_t dev)
875{
876 struct agp_softc *sc = device_get_softc(dev);
877 return sc->as_state;
878}
879
880void
881agp_get_info(device_t dev, struct agp_info *info)
882{
883 struct agp_softc *sc = device_get_softc(dev);
884
885 info->ai_mode =
886 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
887 info->ai_aperture_base = rman_get_start(sc->as_aperture);
fdc3c5be 888 info->ai_aperture_size = rman_get_size(sc->as_aperture);
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889 info->ai_memory_allowed = sc->as_maxmem;
890 info->ai_memory_used = sc->as_allocated;
891}
892
893int
894agp_acquire(device_t dev)
895{
896 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
897}
898
899int
900agp_release(device_t dev)
901{
902 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
903}
904
905int
906agp_enable(device_t dev, u_int32_t mode)
907{
908 return AGP_ENABLE(dev, mode);
909}
910
911void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
912{
913 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
914}
915
916void agp_free_memory(device_t dev, void *handle)
917{
918 struct agp_memory *mem = (struct agp_memory *) handle;
919 AGP_FREE_MEMORY(dev, mem);
920}
921
922int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
923{
924 struct agp_memory *mem = (struct agp_memory *) handle;
925 return AGP_BIND_MEMORY(dev, mem, offset);
926}
927
928int agp_unbind_memory(device_t dev, void *handle)
929{
930 struct agp_memory *mem = (struct agp_memory *) handle;
931 return AGP_UNBIND_MEMORY(dev, mem);
932}
933
934void agp_memory_info(device_t dev, void *handle, struct
935 agp_memory_info *mi)
936{
937 struct agp_memory *mem = (struct agp_memory *) handle;
938
939 mi->ami_size = mem->am_size;
940 mi->ami_physical = mem->am_physical;
941 mi->ami_offset = mem->am_offset;
942 mi->ami_is_bound = mem->am_is_bound;
943}