agp_apple.c revision 1.2.2.1
1 /* $NetBSD: agp_apple.c,v 1.2.2.1 2008/02/18 21:05:55 mjf Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of The NetBSD Foundation nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: agp_apple.c,v 1.2.2.1 2008/02/18 21:05:55 mjf Exp $"); 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/agpio.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/agpvar.h> 48 #include <dev/pci/agpreg.h> 49 50 #include <sys/bus.h> 51 52 static u_int32_t agp_apple_get_aperture(struct agp_softc *); 53 static int agp_apple_set_aperture(struct agp_softc *, u_int32_t); 54 static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t); 55 static int agp_apple_unbind_page(struct agp_softc *, off_t); 56 static void agp_apple_flush_tlb(struct agp_softc *); 57 58 static struct agp_methods agp_apple_methods = { 59 agp_apple_get_aperture, 60 agp_apple_set_aperture, 61 agp_apple_bind_page, 62 agp_apple_unbind_page, 63 agp_apple_flush_tlb, 64 agp_generic_enable, 65 agp_generic_alloc_memory, 66 agp_generic_free_memory, 67 agp_generic_bind_memory, 68 agp_generic_unbind_memory, 69 }; 70 71 struct agp_apple_softc { 72 u_int32_t initial_aperture; /* aperture size at startup */ 73 struct agp_gatt *gatt; 74 }; 75 76 int 77 agp_apple_attach(struct device *parent, struct device *self, void *aux) 78 { 79 struct pci_attach_args *pa = aux; 80 struct agp_softc *sc = (void *)self; 81 struct agp_apple_softc *asc; 82 struct agp_gatt *gatt; 83 84 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT|M_ZERO); 85 if (asc == NULL) { 86 aprint_error(": can't allocate chipset-specific softc\n"); 87 return ENOMEM; 88 } 89 sc->as_chipc = asc; 90 sc->as_methods = &agp_apple_methods; 91 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 92 NULL); 93 94 sc->as_apaddr = 0; 95 sc->as_apsize = 8 * 1024 * 1024; 96 sc->as_apflags = 0; 97 sc->as_pc = pa->pa_pc; 98 sc->as_tag = pa->pa_tag; 99 sc->as_apt = pa->pa_memt; 100 101 asc->initial_aperture = sc->as_apsize; 102 103 for (;;) { 104 gatt = agp_alloc_gatt(sc); 105 if (gatt) 106 break; 107 sc->as_apsize = sc->as_apsize >> 1; 108 if (sc->as_apsize == 0) { 109 aprint_error(": can't set aperture size\n"); 110 return ENOMEM; 111 } 112 } 113 asc->gatt = gatt; 114 115 /* Install the gatt. */ 116 aprint_error("gatt: %08x %d MB\n", gatt->ag_physical, sc->as_apsize >> 20); 117 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE, 118 (gatt->ag_physical & 0xfffff000) | 119 (sc->as_apsize >> 22)); 120 121 /* Enable the aperture. */ 122 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 123 APPLE_GART_EN); 124 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 125 APPLE_GART_EN | APPLE_GART_INV); 126 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 127 APPLE_GART_EN); 128 return 0; 129 } 130 131 static u_int32_t 132 agp_apple_get_aperture(struct agp_softc *sc) 133 { 134 #if 0 135 u_int32_t apsize = 0; 136 137 aprint_error("%s: ", __func__); 138 apsize = pci_conf_read(sc->as_pc, sc->as_tag, 139 APPLE_UNINORTH_GART_BASE) & 0x0000ffff; 140 aprint_error("%08x\n", apsize); 141 return (apsize << 22); 142 #else 143 return sc->as_apsize; 144 #endif 145 } 146 147 static int 148 agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture) 149 { 150 pcireg_t reg; 151 152 aprint_error("%s: %08x\n", __func__, aperture); 153 reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE) 154 & 0xfffff000; 155 reg |= ((aperture >> 22) & 0xfff); 156 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg); 157 sc->as_apsize = aperture; 158 return 0; 159 } 160 161 static int 162 agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 163 { 164 struct agp_apple_softc *asc = sc->as_chipc; 165 166 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 167 return EINVAL; 168 169 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical); 170 return 0; 171 } 172 173 static int 174 agp_apple_unbind_page(struct agp_softc *sc, off_t offset) 175 { 176 struct agp_apple_softc *asc = sc->as_chipc; 177 178 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 179 return EINVAL; 180 181 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 182 return 0; 183 } 184 185 static void 186 agp_apple_flush_tlb(struct agp_softc *sc) 187 { 188 189 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 190 APPLE_GART_EN); 191 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 192 APPLE_GART_EN | APPLE_GART_INV); 193 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 194 APPLE_GART_EN); 195 } 196
Indexes created Mon Oct 20 10:10:01 GMT 2025