1 /* $OpenBSD: agp_apple.c,v 1.5 2014/03/29 18:09:30 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2012 Martin Pieuchot <mpi@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/malloc.h> 22 #include <sys/device.h> 23 #include <sys/rwlock.h> 24 25 #include <dev/pci/pcivar.h> 26 #include <dev/pci/pcireg.h> 27 #include <dev/pci/pcidevs.h> 28 #include <dev/pci/agpvar.h> 29 #include <dev/pci/agpreg.h> 30 31 #include <machine/bus.h> 32 33 #define M (1024 * 1024) 34 35 struct agp_apple_softc { 36 struct device dev; 37 struct agp_softc *agpdev; 38 struct agp_gatt *gatt; 39 pci_chipset_tag_t asc_pc; 40 pcitag_t asc_tag; 41 bus_addr_t asc_apaddr; 42 bus_size_t asc_apsize; 43 int asc_flags; 44 #define AGP_APPLE_ISU3 (1 << 0) 45 }; 46 47 int agp_apple_match(struct device *, void *, void *); 48 void agp_apple_attach(struct device *, struct device *, void *); 49 bus_size_t agp_apple_get_aperture(void *); 50 int agp_apple_set_aperture(void *sc, bus_size_t); 51 void agp_apple_bind_page(void *, bus_addr_t, paddr_t, int); 52 void agp_apple_unbind_page(void *, bus_addr_t); 53 void agp_apple_flush_tlb(void *); 54 55 const struct cfattach appleagp_ca = { 56 sizeof(struct agp_apple_softc), agp_apple_match, agp_apple_attach, 57 }; 58 59 struct cfdriver appleagp_cd = { 60 NULL, "appleagp", DV_DULL 61 }; 62 63 const struct agp_methods agp_apple_methods = { 64 agp_apple_bind_page, 65 agp_apple_unbind_page, 66 agp_apple_flush_tlb, 67 }; 68 69 int 70 agp_apple_match(struct device *parent, void *match, void *aux) 71 { 72 struct agp_attach_args *aa = aux; 73 struct pci_attach_args *pa = aa->aa_pa; 74 75 if (agpbus_probe(aa) != 1 || PCI_VENDOR(pa->pa_id) != PCI_VENDOR_APPLE) 76 return (0); 77 78 switch (PCI_PRODUCT(pa->pa_id)) { 79 case PCI_PRODUCT_APPLE_UNINORTH_AGP: 80 case PCI_PRODUCT_APPLE_PANGEA_AGP: 81 case PCI_PRODUCT_APPLE_UNINORTH2_AGP: 82 case PCI_PRODUCT_APPLE_UNINORTH_AGP3: 83 case PCI_PRODUCT_APPLE_INTREPID2_AGP: 84 case PCI_PRODUCT_APPLE_U3_AGP: 85 case PCI_PRODUCT_APPLE_U3L_AGP: 86 case PCI_PRODUCT_APPLE_K2_AGP: 87 return (1); 88 } 89 90 return (0); 91 } 92 93 void 94 agp_apple_attach(struct device *parent, struct device *self, void *aux) 95 { 96 struct agp_apple_softc *asc = (struct agp_apple_softc *)self; 97 struct agp_attach_args *aa = aux; 98 struct pci_attach_args *pa = aa->aa_pa; 99 struct agp_gatt *gatt; 100 101 asc->asc_tag = pa->pa_tag; 102 asc->asc_pc = pa->pa_pc; 103 104 switch (PCI_PRODUCT(pa->pa_id)) { 105 case PCI_PRODUCT_APPLE_U3_AGP: 106 case PCI_PRODUCT_APPLE_U3L_AGP: 107 case PCI_PRODUCT_APPLE_K2_AGP: 108 asc->asc_flags |= AGP_APPLE_ISU3; 109 break; 110 default: 111 break; 112 } 113 114 /* 115 * XXX It looks like UniNorth GART only accepts an aperture 116 * base address of 0x00 certainly because it does not perform 117 * any physical-to-physical address translation. 118 */ 119 asc->asc_apaddr = 0x00; 120 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_APBASE, 121 asc->asc_apaddr); 122 123 /* 124 * There's no way to read the aperture size but all UniNorth 125 * chips seem to support an aperture of 256M (and 512M for U3). 126 */ 127 asc->asc_apsize = 256 * M; 128 for (;;) { 129 gatt = agp_alloc_gatt(pa->pa_dmat, asc->asc_apsize); 130 if (gatt != NULL) 131 break; 132 133 asc->asc_apsize /= 2; 134 } 135 asc->gatt = gatt; 136 137 if (agp_apple_set_aperture(asc, asc->asc_apsize)) { 138 printf("failed to set aperture\n"); 139 return; 140 } 141 142 agp_apple_flush_tlb(asc); 143 144 asc->agpdev = (struct agp_softc *)agp_attach_bus(pa, &agp_apple_methods, 145 asc->asc_apaddr, asc->asc_apsize, &asc->dev); 146 } 147 148 bus_size_t 149 agp_apple_get_aperture(void *dev) 150 { 151 struct agp_apple_softc *asc = dev; 152 153 return (asc->asc_apsize); 154 } 155 156 int 157 agp_apple_set_aperture(void *dev, bus_size_t aperture) 158 { 159 struct agp_apple_softc *asc = dev; 160 161 if (aperture % (4 * M) || aperture < (4 * M) || aperture > (256 * M)) 162 return (EINVAL); 163 164 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_ATTBASE, 165 (asc->gatt->ag_physical & 0xfffff000) | (aperture >> 22)); 166 167 return (0); 168 } 169 170 #define flushd(p) __asm volatile("dcbst 0,%0; sync" ::"r"(p) : "memory") 171 172 void 173 agp_apple_bind_page(void *v, bus_addr_t off, paddr_t pa, int flags) 174 { 175 struct agp_apple_softc *asc = v; 176 uint32_t entry; 177 178 if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 179 return; 180 181 if (asc->asc_flags & AGP_APPLE_ISU3) 182 entry = (pa >> PAGE_SHIFT | 0x80000000); 183 else 184 entry = htole32(pa | 0x01); 185 186 asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = entry; 187 188 flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]); 189 } 190 191 void 192 agp_apple_unbind_page(void *v, bus_size_t off) 193 { 194 struct agp_apple_softc *asc = v; 195 196 if (off >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 197 return; 198 199 asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT] = 0; 200 201 flushd(&asc->gatt->ag_virtual[off >> AGP_PAGE_SHIFT]); 202 } 203 204 #undef flushd 205 206 void 207 agp_apple_flush_tlb(void *v) 208 { 209 struct agp_apple_softc *asc = v; 210 211 if (asc->asc_flags & AGP_APPLE_ISU3) { 212 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 213 AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD | 214 AGP_APPLE_GART_INVALIDATE); 215 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 216 AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_PERFRD); 217 } else { 218 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 219 AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_INVALIDATE); 220 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 221 AGP_APPLE_GART_ENABLE); 222 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 223 AGP_APPLE_GART_ENABLE | AGP_APPLE_GART_2XRESET); 224 pci_conf_write(asc->asc_pc, asc->asc_tag, AGP_APPLE_GARTCTRL, 225 AGP_APPLE_GART_ENABLE); 226 } 227 } 228