agp_apple.c revision 1.5
1 /* $NetBSD: agp_apple.c,v 1.5 2008/06/09 06:49:54 freza 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 1.5 2008/06/09 06:49:54 freza 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 <uvm/uvm_extern.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/agpvar.h> 45 #include <dev/pci/agpreg.h> 46 47 #include <sys/bus.h> 48 49 static u_int32_t agp_apple_get_aperture(struct agp_softc *); 50 static int agp_apple_set_aperture(struct agp_softc *, u_int32_t); 51 static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t); 52 static int agp_apple_unbind_page(struct agp_softc *, off_t); 53 static void agp_apple_flush_tlb(struct agp_softc *); 54 55 static struct agp_methods agp_apple_methods = { 56 agp_apple_get_aperture, 57 agp_apple_set_aperture, 58 agp_apple_bind_page, 59 agp_apple_unbind_page, 60 agp_apple_flush_tlb, 61 agp_generic_enable, 62 agp_generic_alloc_memory, 63 agp_generic_free_memory, 64 agp_generic_bind_memory, 65 agp_generic_unbind_memory, 66 }; 67 68 struct agp_apple_softc { 69 u_int32_t initial_aperture; /* aperture size at startup */ 70 struct agp_gatt *gatt; 71 }; 72 73 int 74 agp_apple_attach(device_t parent, device_t self, void *aux) 75 { 76 struct pci_attach_args *pa = aux; 77 struct agp_softc *sc = device_private(self); 78 struct agp_apple_softc *asc; 79 struct agp_gatt *gatt; 80 81 asc = malloc(sizeof *asc, M_AGP, M_NOWAIT|M_ZERO); 82 if (asc == NULL) { 83 aprint_error(": can't allocate chipset-specific softc\n"); 84 return ENOMEM; 85 } 86 sc->as_chipc = asc; 87 sc->as_methods = &agp_apple_methods; 88 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 89 NULL); 90 91 sc->as_apaddr = 0; 92 sc->as_apsize = 8 * 1024 * 1024; 93 sc->as_apflags = 0; 94 sc->as_pc = pa->pa_pc; 95 sc->as_tag = pa->pa_tag; 96 sc->as_apt = pa->pa_memt; 97 98 asc->initial_aperture = sc->as_apsize; 99 100 for (;;) { 101 gatt = agp_alloc_gatt(sc); 102 if (gatt) 103 break; 104 sc->as_apsize = sc->as_apsize >> 1; 105 if (sc->as_apsize == 0) { 106 aprint_error(": can't set aperture size\n"); 107 return ENOMEM; 108 } 109 } 110 asc->gatt = gatt; 111 112 /* Install the gatt. */ 113 aprint_error("gatt: %08x %d MB\n", gatt->ag_physical, sc->as_apsize >> 20); 114 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE, 115 (gatt->ag_physical & 0xfffff000) | 116 (sc->as_apsize >> 22)); 117 118 /* Enable the aperture. */ 119 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 120 APPLE_GART_EN); 121 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 122 APPLE_GART_EN | APPLE_GART_INV); 123 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 124 APPLE_GART_EN); 125 return 0; 126 } 127 128 static u_int32_t 129 agp_apple_get_aperture(struct agp_softc *sc) 130 { 131 #if 0 132 u_int32_t apsize = 0; 133 134 aprint_error("%s: ", __func__); 135 apsize = pci_conf_read(sc->as_pc, sc->as_tag, 136 APPLE_UNINORTH_GART_BASE) & 0x0000ffff; 137 aprint_error("%08x\n", apsize); 138 return (apsize << 22); 139 #else 140 return sc->as_apsize; 141 #endif 142 } 143 144 static int 145 agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture) 146 { 147 pcireg_t reg; 148 149 aprint_error("%s: %08x\n", __func__, aperture); 150 reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE) 151 & 0xfffff000; 152 reg |= ((aperture >> 22) & 0xfff); 153 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg); 154 sc->as_apsize = aperture; 155 return 0; 156 } 157 158 static int 159 agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 160 { 161 struct agp_apple_softc *asc = sc->as_chipc; 162 163 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 164 return EINVAL; 165 166 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical); 167 return 0; 168 } 169 170 static int 171 agp_apple_unbind_page(struct agp_softc *sc, off_t offset) 172 { 173 struct agp_apple_softc *asc = sc->as_chipc; 174 175 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 176 return EINVAL; 177 178 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 179 return 0; 180 } 181 182 static void 183 agp_apple_flush_tlb(struct agp_softc *sc) 184 { 185 186 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 187 APPLE_GART_EN); 188 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 189 APPLE_GART_EN | APPLE_GART_INV); 190 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 191 APPLE_GART_EN); 192 } 193
Indexes created Tue Sep 23 21:09:50 GMT 2025