2 * Copyright (c) 2005 Eric Anholt
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * Based on reading the Linux 2.6.8.1 driver by Dave Jones.
28 * $FreeBSD: src/sys/dev/agp/agp_ati.c,v 1.5 2007/11/12 21:51:36 jhb Exp $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
40 #include <bus/pci/pcivar.h>
41 #include <bus/pci/pcireg.h>
46 #include <vm/vm_object.h>
51 MALLOC_DECLARE(M_AGP);
53 #define READ4(off) bus_space_read_4(sc->bst, sc->bsh, off)
54 #define WRITE4(off,v) bus_space_write_4(sc->bst, sc->bsh, off, v)
56 struct agp_ati_softc {
58 struct resource *regs; /* memory mapped control registers */
59 bus_space_tag_t bst; /* bus_space tag */
60 bus_space_handle_t bsh; /* bus_space handle */
61 u_int32_t initial_aperture; /* aperture size at startup */
66 u_int32_t *ag_virtual; /* virtual address of gatt */
67 u_int32_t *ag_vdir; /* virtual address of page dir */
68 vm_offset_t ag_pdir; /* physical address of page dir */
73 agp_ati_match(device_t dev)
75 if (pci_get_class(dev) != PCIC_BRIDGE ||
76 pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
79 if (agp_find_caps(dev) == 0)
82 switch (pci_get_devid(dev)) {
84 return ("ATI RS100 AGP bridge");
86 return ("ATI RS200 AGP bridge");
88 return ("ATI RS200M AGP bridge");
90 return ("ATI RS250 AGP bridge");
92 return ("ATI RS300_100 AGP bridge");
94 return ("ATI RS300_133 AGP bridge");
96 return ("ATI RS300_166 AGP bridge");
98 return ("ATI RS300_200 AGP bridge");
105 agp_ati_probe(device_t dev)
109 desc = agp_ati_match(dev);
112 device_set_desc(dev, desc);
120 agp_ati_alloc_gatt(device_t dev)
122 struct agp_ati_softc *sc = device_get_softc(dev);
123 u_int32_t apsize = AGP_GET_APERTURE(dev);
124 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
125 u_int32_t apbase_offset;
128 /* Alloc the GATT -- pointers to pages of AGP memory */
129 sc->ag_entries = entries;
130 sc->ag_virtual = kmalloc(entries * sizeof(u_int32_t), M_AGP,
132 if (sc->ag_virtual == NULL) {
134 device_printf(dev, "aperture allocation failed\n");
138 /* Alloc the page directory -- pointers to each page of the GATT */
139 sc->ag_vdir = kmalloc(AGP_PAGE_SIZE, M_AGP, M_NOWAIT | M_ZERO);
140 if (sc->ag_vdir == NULL) {
142 device_printf(dev, "pagedir allocation failed\n");
143 kfree(sc->ag_virtual, M_AGP);
146 sc->ag_pdir = vtophys((vm_offset_t)sc->ag_vdir);
148 apbase_offset = pci_read_config(dev, AGP_APBASE, 4) >> 22;
149 /* Fill in the pagedir's pointers to GATT pages */
150 for (i = 0; i < sc->ag_entries / 1024; i++) {
154 va = ((vm_offset_t)sc->ag_virtual) + i * AGP_PAGE_SIZE;
156 sc->ag_vdir[apbase_offset + i] = pa | 1;
160 * Make sure the chipset can see everything.
169 agp_ati_attach(device_t dev)
171 struct agp_ati_softc *sc = device_get_softc(dev);
174 u_int32_t apsize_reg, agpmode_reg;
176 error = agp_generic_attach(dev);
180 switch (pci_get_devid(dev)) {
181 case 0xcab01002: /* ATI RS100 AGP bridge */
182 case 0xcab21002: /* ATI RS200 AGP bridge */
183 case 0xcbb21002: /* ATI RS200M AGP bridge */
184 case 0xcab31002: /* ATI RS250 AGP bridge */
186 apsize_reg = ATI_RS100_APSIZE;
187 agpmode_reg = ATI_RS100_IG_AGPMODE;
189 case 0x58301002: /* ATI RS300_100 AGP bridge */
190 case 0x58311002: /* ATI RS300_133 AGP bridge */
191 case 0x58321002: /* ATI RS300_166 AGP bridge */
192 case 0x58331002: /* ATI RS300_200 AGP bridge */
194 apsize_reg = ATI_RS300_APSIZE;
195 agpmode_reg = ATI_RS300_IG_AGPMODE;
198 /* Unknown chipset */
202 rid = ATI_GART_MMADDR;
203 sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
205 agp_generic_detach(dev);
209 sc->bst = rman_get_bustag(sc->regs);
210 sc->bsh = rman_get_bushandle(sc->regs);
212 sc->initial_aperture = AGP_GET_APERTURE(dev);
213 if (sc->initial_aperture == 0) {
214 device_printf(dev, "bad initial aperture size, disabling\n");
219 if (agp_ati_alloc_gatt(dev) == 0)
223 * Probably contigmalloc failure. Try reducing the
224 * aperture so that the gatt size reduces.
226 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2))
230 temp = pci_read_config(dev, apsize_reg, 4);
231 pci_write_config(dev, apsize_reg, temp | 1, 4);
233 pci_write_config(dev, agpmode_reg, 0x20000, 4);
235 WRITE4(ATI_GART_FEATURE_ID, 0x00060000);
237 temp = pci_read_config(dev, 4, 4); /* XXX: Magic reg# */
238 pci_write_config(dev, 4, temp | (1 << 14), 4);
240 WRITE4(ATI_GART_BASE, sc->ag_pdir);
248 agp_ati_detach(device_t dev)
250 struct agp_ati_softc *sc = device_get_softc(dev);
251 u_int32_t apsize_reg, temp;
256 apsize_reg = ATI_RS300_APSIZE;
258 apsize_reg = ATI_RS100_APSIZE;
260 /* Clear the GATT base */
261 WRITE4(ATI_GART_BASE, 0);
263 /* Put the aperture back the way it started. */
264 AGP_SET_APERTURE(dev, sc->initial_aperture);
266 temp = pci_read_config(dev, apsize_reg, 4);
267 pci_write_config(dev, apsize_reg, temp & ~1, 4);
269 kfree(sc->ag_vdir, M_AGP);
270 kfree(sc->ag_virtual, M_AGP);
272 bus_release_resource(dev, SYS_RES_MEMORY, ATI_GART_MMADDR, sc->regs);
279 agp_ati_get_aperture(device_t dev)
281 struct agp_ati_softc *sc = device_get_softc(dev);
285 size_value = pci_read_config(dev, ATI_RS300_APSIZE, 4);
287 size_value = pci_read_config(dev, ATI_RS100_APSIZE, 4);
289 size_value = (size_value & 0x0000000e) >> 1;
290 size_value = (32 * 1024 * 1024) << size_value;
296 agp_ati_set_aperture(device_t dev, u_int32_t aperture)
298 struct agp_ati_softc *sc = device_get_softc(dev);
300 u_int32_t apsize_reg;
303 apsize_reg = ATI_RS300_APSIZE;
305 apsize_reg = ATI_RS100_APSIZE;
307 size_value = pci_read_config(dev, apsize_reg, 4);
309 size_value &= ~0x0000000e;
310 size_value |= (ffs(aperture / (32 * 1024 * 1024)) - 1) << 1;
312 pci_write_config(dev, apsize_reg, size_value, 4);
318 agp_ati_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical)
320 struct agp_ati_softc *sc = device_get_softc(dev);
322 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
325 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 1;
331 agp_ati_unbind_page(device_t dev, vm_offset_t offset)
333 struct agp_ati_softc *sc = device_get_softc(dev);
335 if (offset >= (sc->ag_entries << AGP_PAGE_SHIFT))
338 sc->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
343 agp_ati_flush_tlb(device_t dev)
345 struct agp_ati_softc *sc = device_get_softc(dev);
347 /* Set the cache invalidate bit and wait for the chipset to clear */
348 WRITE4(ATI_GART_CACHE_CNTRL, 1);
349 (void)READ4(ATI_GART_CACHE_CNTRL);
352 static device_method_t agp_ati_methods[] = {
353 /* Device interface */
354 DEVMETHOD(device_probe, agp_ati_probe),
355 DEVMETHOD(device_attach, agp_ati_attach),
356 DEVMETHOD(device_detach, agp_ati_detach),
357 DEVMETHOD(device_shutdown, bus_generic_shutdown),
358 DEVMETHOD(device_suspend, bus_generic_suspend),
359 DEVMETHOD(device_resume, bus_generic_resume),
362 DEVMETHOD(agp_get_aperture, agp_ati_get_aperture),
363 DEVMETHOD(agp_set_aperture, agp_ati_set_aperture),
364 DEVMETHOD(agp_bind_page, agp_ati_bind_page),
365 DEVMETHOD(agp_unbind_page, agp_ati_unbind_page),
366 DEVMETHOD(agp_flush_tlb, agp_ati_flush_tlb),
367 DEVMETHOD(agp_enable, agp_generic_enable),
368 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
369 DEVMETHOD(agp_free_memory, agp_generic_free_memory),
370 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
371 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
376 static driver_t agp_ati_driver = {
379 sizeof(struct agp_ati_softc),
382 static devclass_t agp_devclass;
384 DRIVER_MODULE(agp_ati, pci, agp_ati_driver, agp_devclass, NULL, NULL);
385 MODULE_DEPEND(agp_ati, agp, 1, 1, 1);
386 MODULE_DEPEND(agp_ati, pci, 1, 1, 1);