Annotation of sys/dev/pci/agp_intel.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: agp_intel.c,v 1.4 2007/08/04 19:40:25 reyk Exp $ */
2: /* $NetBSD: agp_intel.c,v 1.3 2001/09/15 00:25:00 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 2000 Doug Rabson
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: *
29: * $FreeBSD: src/sys/pci/agp_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $
30: */
31:
32:
33: #include <sys/param.h>
34: #include <sys/systm.h>
35: #include <sys/malloc.h>
36: #include <sys/kernel.h>
37: #include <sys/lock.h>
38: #include <sys/proc.h>
39: #include <sys/agpio.h>
40: #include <sys/device.h>
41: #include <sys/agpio.h>
42:
43:
44: #include <dev/pci/pcivar.h>
45: #include <dev/pci/pcireg.h>
46: #include <dev/pci/vga_pcivar.h>
47: #include <dev/pci/agpvar.h>
48: #include <dev/pci/agpreg.h>
49:
50: #include <machine/bus.h>
51:
52: struct agp_intel_softc {
53: u_int32_t initial_aperture; /* aperture size at startup */
54: struct agp_gatt *gatt;
55: };
56:
57:
58: static u_int32_t agp_intel_get_aperture(struct vga_pci_softc *);
59: static int agp_intel_set_aperture(struct vga_pci_softc *, u_int32_t);
60: static int agp_intel_bind_page(struct vga_pci_softc *, off_t, bus_addr_t);
61: static int agp_intel_unbind_page(struct vga_pci_softc *, off_t);
62: static void agp_intel_flush_tlb(struct vga_pci_softc *);
63:
64: struct agp_methods agp_intel_methods = {
65: agp_intel_get_aperture,
66: agp_intel_set_aperture,
67: agp_intel_bind_page,
68: agp_intel_unbind_page,
69: agp_intel_flush_tlb,
70: agp_generic_enable,
71: agp_generic_alloc_memory,
72: agp_generic_free_memory,
73: agp_generic_bind_memory,
74: agp_generic_unbind_memory,
75: };
76:
77: int
78: agp_intel_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa,
79: struct pci_attach_args *pchb_pa)
80: {
81: struct agp_intel_softc *isc;
82: struct agp_gatt *gatt;
83: pcireg_t reg;
84:
85: isc = malloc(sizeof *isc, M_DEVBUF, M_NOWAIT);
86: if (isc == NULL) {
87: printf(": can't allocate chipset-specific softc\n");
88: return (ENOMEM);
89: }
90: memset(isc, 0, sizeof *isc);
91:
92: sc->sc_methods = &agp_intel_methods;
93: sc->sc_chipc = isc;
94:
95: if (agp_map_aperture(sc, AGP_APBASE, PCI_MAPREG_TYPE_MEM) != 0) {
96: printf(": can't map aperture\n");
97: free(isc, M_DEVBUF);
98: sc->sc_chipc = NULL;
99: return (ENXIO);
100: }
101:
102: isc->initial_aperture = AGP_GET_APERTURE(sc);
103:
104: for (;;) {
105: gatt = agp_alloc_gatt(sc);
106: if (gatt)
107: break;
108:
109: /*
110: * Probably contigmalloc failure. Try reducing the
111: * aperture so that the gatt size reduces.
112: */
113: if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) {
114: agp_generic_detach(sc);
115: printf(": failed to set aperture\n");
116: return (ENOMEM);
117: }
118: }
119: isc->gatt = gatt;
120:
121: /* Install the gatt. */
122: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_ATTBASE,
123: gatt->ag_physical);
124:
125: /* Enable things, clear errors etc. */
126: /* XXXfvdl get rid of the magic constants */
127: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2280);
128: reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG);
129: reg &= ~(1 << 10);
130: reg |= (1 << 9);
131: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG, reg);
132:
133: reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_STS);
134: reg &= ~0x00ff0000;
135: reg |= (7 << 16);
136: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_STS, reg);
137:
138: return (0);
139: }
140:
141: #if 0
142: static int
143: agp_intel_detach(struct vga_pci_softc *sc)
144: {
145: int error;
146: pcireg_t reg;
147: struct agp_intel_softc *isc = sc->sc_chipc;
148:
149: error = agp_generic_detach(sc);
150: if (error)
151: return (error);
152:
153: reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG);
154: reg &= ~(1 << 9);
155: printf("%s: set NBXCFG to %x\n", __FUNCTION__, reg);
156: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_NBXCFG, reg);
157: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_ATTBASE, 0);
158: AGP_SET_APERTURE(sc, isc->initial_aperture);
159: agp_free_gatt(sc, isc->gatt);
160:
161: return (0);
162: }
163: #endif
164:
165: static u_int32_t
166: agp_intel_get_aperture(struct vga_pci_softc *sc)
167: {
168: u_int32_t apsize;
169:
170: apsize = pci_conf_read(sc->sc_pc, sc->sc_pcitag,
171: AGP_INTEL_APSIZE) & 0x1f;
172:
173: /*
174: * The size is determined by the number of low bits of
175: * register APBASE which are forced to zero. The low 22 bits
176: * are always forced to zero and each zero bit in the apsize
177: * field just read forces the corresponding bit in the 27:22
178: * to be zero. We calculate the aperture size accordingly.
179: */
180: return ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1);
181: }
182:
183: static int
184: agp_intel_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture)
185: {
186: u_int32_t apsize;
187: pcireg_t reg;
188:
189: /*
190: * Reverse the magic from get_aperture.
191: */
192: apsize = ((aperture - 1) >> 22) ^ 0x1f;
193:
194: /*
195: * Double check for sanity.
196: */
197: if ((((apsize ^ 0x1f) << 22) | ((1 << 22) - 1)) + 1 != aperture)
198: return (EINVAL);
199:
200: reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_APSIZE);
201: reg = (reg & 0xffffff00) | apsize;
202: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_APSIZE, reg);
203:
204: return (0);
205: }
206:
207: static int
208: agp_intel_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical)
209: {
210: struct agp_intel_softc *isc = sc->sc_chipc;
211:
212: if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT))
213: return (EINVAL);
214:
215: isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17;
216: return (0);
217: }
218:
219: static int
220: agp_intel_unbind_page(struct vga_pci_softc *sc, off_t offset)
221: {
222: struct agp_intel_softc *isc = sc->sc_chipc;
223:
224: if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT))
225: return (EINVAL);
226:
227: isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
228: return (0);
229: }
230:
231: static void
232: agp_intel_flush_tlb(struct vga_pci_softc *sc)
233: {
234: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2200);
235: pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_INTEL_AGPCTRL, 0x2280);
236: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to agp_intel.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / dev / pci