1 /* $NetBSD: agp_apple.c,v 1.8 2019/11/10 21:16:36 chs 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: agp_apple.c,v 1.8 2019/11/10 21:16:36 chs Exp $"); 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/agpio.h> 39 40 #include <dev/pci/pcivar.h> 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/agpvar.h> 43 #include <dev/pci/agpreg.h> 44 45 #include <sys/bus.h> 46 47 #define APPLE_UNINORTH_GART_BASE 0x8c 48 #define APPLE_UNINORTH_GART_BASE_ADDR 0x90 49 #define APPLE_UNINORTH_GART_CTRL 0x94 50 #define APPLE_UNINORTH_GART_INVAL 0x00000001 51 #define APPLE_UNINORTH_GART_ENABLE 0x00000100 52 #define APPLE_UNINORTH_GART_2XRESET 0x00010000 53 #define APPLE_UNINORTH_GART_PERFRD 0x00080000 54 55 static u_int32_t agp_apple_get_aperture(struct agp_softc *); 56 static int agp_apple_set_aperture(struct agp_softc *, u_int32_t); 57 static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t); 58 static int agp_apple_unbind_page(struct agp_softc *, off_t); 59 static void agp_apple_flush_tlb(struct agp_softc *); 60 61 static struct agp_methods agp_apple_methods = { 62 agp_apple_get_aperture, 63 agp_apple_set_aperture, 64 agp_apple_bind_page, 65 agp_apple_unbind_page, 66 agp_apple_flush_tlb, 67 agp_generic_enable, 68 agp_generic_alloc_memory, 69 agp_generic_free_memory, 70 agp_generic_bind_memory, 71 agp_generic_unbind_memory, 72 }; 73 74 struct agp_apple_softc { 75 u_int32_t initial_aperture; /* aperture size at startup */ 76 struct agp_gatt *gatt; 77 }; 78 79 int 80 agp_apple_attach(device_t parent, device_t self, void *aux) 81 { 82 struct pci_attach_args *pa = aux; 83 struct agp_softc *sc = device_private(self); 84 struct agp_apple_softc *asc; 85 struct agp_gatt *gatt; 86 87 asc = malloc(sizeof *asc, M_AGP, M_WAITOK|M_ZERO); 88 sc->as_chipc = asc; 89 sc->as_methods = &agp_apple_methods; 90 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 91 NULL); 92 93 sc->as_apaddr = 0; 94 sc->as_apsize = 8 * 1024 * 1024; 95 sc->as_apflags = 0; 96 sc->as_pc = pa->pa_pc; 97 sc->as_tag = pa->pa_tag; 98 sc->as_apt = pa->pa_memt; 99 100 asc->initial_aperture = sc->as_apsize; 101 102 for (;;) { 103 gatt = agp_alloc_gatt(sc); 104 if (gatt) 105 break; 106 sc->as_apsize = sc->as_apsize >> 1; 107 if (sc->as_apsize == 0) { 108 aprint_error(": can't set aperture size\n"); 109 return ENOMEM; 110 } 111 } 112 asc->gatt = gatt; 113 114 /* Install the gatt. */ 115 aprint_error("gatt: %08jx %ju MB\n", (uintmax_t)gatt->ag_physical, 116 (uintmax_t)(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_UNINORTH_GART_ENABLE); 124 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 125 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL); 126 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 127 APPLE_UNINORTH_GART_ENABLE); 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_UNINORTH_GART_ENABLE); 191 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 192 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL); 193 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 194 APPLE_UNINORTH_GART_ENABLE); 195 } 196
Indexes created Sat Sep 20 22:09:52 GMT 2025