genfb_pci.c revision 1.2
1 /* $NetBSD: genfb_pci.c,v 1.2 2007/11/19 04:03:44 macallan 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: genfb_pci.c,v 1.2 2007/11/19 04:03:44 macallan Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/mutex.h> 41 #include <sys/ioctl.h> 42 #include <sys/kernel.h> 43 #include <sys/systm.h> 44 #include <sys/kauth.h> 45 46 #include <dev/pci/pcidevs.h> 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pciio.h> 50 51 #include <dev/wsfb/genfbvar.h> 52 53 #include "opt_wsfb.h" 54 #include "opt_genfb.h" 55 56 #ifdef GENFB_PCI_DEBUG 57 # define DPRINTF printf 58 #else 59 # define DPRINTF while (0) printf 60 #endif 61 62 struct range { 63 bus_addr_t offset; 64 bus_size_t size; 65 int flags; 66 }; 67 68 struct pci_genfb_softc { 69 struct genfb_softc sc_gen; 70 71 pci_chipset_tag_t sc_pc; 72 pcitag_t sc_pcitag; 73 bus_space_tag_t sc_memt; 74 bus_space_tag_t sc_iot; 75 bus_space_handle_t sc_memh; 76 pcireg_t sc_bars[9]; 77 struct range sc_ranges[8]; 78 int sc_ranges_used; 79 }; 80 81 static int pci_genfb_match(struct device *, struct cfdata *, void *); 82 static void pci_genfb_attach(struct device *, struct device *, void *); 83 static int pci_genfb_ioctl(void *, void *, u_long, void *, int, 84 struct lwp *); 85 static paddr_t pci_genfb_mmap(void *, void *, off_t, int); 86 static int pci_genfb_drm_print(void *, const char *); 87 88 89 CFATTACH_DECL(genfb_pci, sizeof(struct pci_genfb_softc), 90 pci_genfb_match, pci_genfb_attach, NULL, NULL); 91 92 static int 93 pci_genfb_match(struct device *parent, struct cfdata *match, void *aux) 94 { 95 struct pci_attach_args *pa = aux; 96 97 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 98 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 99 return 1; 100 101 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 102 return 1; 103 104 return 0; 105 } 106 107 static void 108 pci_genfb_attach(struct device *parent, struct device *self, void *aux) 109 { 110 struct pci_genfb_softc *sc = (struct pci_genfb_softc *)self; 111 struct pci_attach_args *pa = aux; 112 struct genfb_ops ops; 113 int idx, bar, type; 114 char devinfo[256]; 115 116 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 117 printf(": %s\n", devinfo); 118 119 sc->sc_memt = pa->pa_memt; 120 sc->sc_iot = pa->pa_iot; 121 sc->sc_pc = pa->pa_pc; 122 sc->sc_pcitag = pa->pa_tag; 123 genfb_init(&sc->sc_gen); 124 125 if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) { 126 aprint_error("%s: bogus parameters, unable to continue\n", 127 device_xname(self)); 128 return; 129 } 130 131 if (bus_space_map(sc->sc_memt, sc->sc_gen.sc_fboffset, 132 sc->sc_gen.sc_fbsize, BUS_SPACE_MAP_LINEAR, &sc->sc_memh) != 0) { 133 134 panic("%s: unable to map the framebuffer\n", self->dv_xname); 135 } 136 sc->sc_gen.sc_fbaddr = bus_space_vaddr(sc->sc_memt, sc->sc_memh); 137 138 /* mmap()able bus ranges */ 139 idx = 0; 140 bar = 0x10; 141 while (bar < 0x30) { 142 143 type = pci_mapreg_type(sc->sc_pc, sc->sc_pcitag, bar); 144 if ((type == PCI_MAPREG_TYPE_MEM) || 145 (type == PCI_MAPREG_TYPE_ROM)) { 146 147 pci_mapreg_info(sc->sc_pc, sc->sc_pcitag, bar, type, 148 &sc->sc_ranges[idx].offset, 149 &sc->sc_ranges[idx].size, 150 &sc->sc_ranges[idx].flags); 151 idx++; 152 } 153 sc->sc_bars[(bar - 0x10) >> 2] = 154 pci_conf_read(sc->sc_pc, sc->sc_pcitag, bar); 155 bar += 4; 156 } 157 sc->sc_ranges_used = idx; 158 159 ops.genfb_ioctl = pci_genfb_ioctl; 160 ops.genfb_mmap = pci_genfb_mmap; 161 162 genfb_attach(&sc->sc_gen, &ops); 163 164 /* now try to attach a DRM */ 165 config_found_ia(self, "drm", aux, pci_genfb_drm_print); 166 } 167 168 static int 169 pci_genfb_drm_print(void *aux, const char *pnp) 170 { 171 if (pnp) 172 aprint_normal("direct rendering for %s", pnp); 173 return (UNSUPP); 174 } 175 176 177 static int 178 pci_genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 179 struct lwp *l) 180 { 181 struct pci_genfb_softc *sc = v; 182 183 switch (cmd) { 184 case WSDISPLAYIO_GTYPE: 185 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; 186 return 0; 187 188 /* PCI config read/write passthrough. */ 189 case PCI_IOC_CFGREAD: 190 case PCI_IOC_CFGWRITE: 191 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 192 cmd, data, flag, l)); 193 case WSDISPLAYIO_SMODE: 194 { 195 int new_mode = *(int*)data, i; 196 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 197 for (i = 0; i < 9; i++) 198 pci_conf_write(sc->sc_pc, 199 sc->sc_pcitag, 200 0x10 + (i << 2), 201 sc->sc_bars[i]); 202 } 203 } 204 return 0; 205 } 206 207 return EPASSTHROUGH; 208 } 209 210 static paddr_t 211 pci_genfb_mmap(void *v, void *vs, off_t offset, int prot) 212 { 213 struct pci_genfb_softc *sc = v; 214 struct range *r; 215 struct lwp *me; 216 int i; 217 218 /* regular fb mapping at 0 */ 219 DPRINTF("%s: %08x limit %08x\n", __func__, (uint32_t)offset, 220 (uint32_t)sc->sc_gen.sc_fbsize); 221 if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize)) { 222 223 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 224 offset, prot, BUS_SPACE_MAP_LINEAR); 225 } 226 227 /* 228 * restrict all other mappings to processes with superuser privileges 229 * or the kernel itself 230 */ 231 me = curlwp; 232 if (me != NULL) { 233 if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, 234 NULL) != 0) { 235 aprint_normal("%s: mmap() rejected.\n", 236 sc->sc_gen.sc_dev.dv_xname); 237 return -1; 238 } 239 } 240 241 #ifdef WSFB_FAKE_VGA_FB 242 if ((offset >= 0xa0000) && (offset < 0xbffff)) { 243 244 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 245 offset - 0xa0000, prot, BUS_SPACE_MAP_LINEAR); 246 } 247 #endif 248 249 /* 250 * XXX this should be generalized, let's just 251 * #define PCI_IOAREA_PADDR 252 * #define PCI_IOAREA_OFFSET 253 * #define PCI_IOAREA_SIZE 254 * somewhere in a MD header and compile this code only if all are 255 * present 256 */ 257 #ifdef macppc 258 /* allow to map our IO space */ 259 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) { 260 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot, 261 BUS_SPACE_MAP_LINEAR); 262 } 263 #endif 264 265 /* allow to mmap() our BARs */ 266 /* maybe the ROM BAR too? */ 267 for (i = 0; i < sc->sc_ranges_used; i++) { 268 269 r = &sc->sc_ranges[i]; 270 if ((offset >= r->offset) && (offset < (r->offset + r->size))) { 271 return bus_space_mmap(sc->sc_memt, offset, 0, prot, 272 r->flags); 273 } 274 } 275 276 return -1; 277 } 278
Indexes created Fri Sep 26 08:10:20 GMT 2025