genfb_pci.c revision 1.11
1 /* $NetBSD: genfb_pci.c,v 1.11 2008/05/05 11:42:45 jmcneill 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: genfb_pci.c,v 1.11 2008/05/05 11:42:45 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/proc.h> 37 #include <sys/mutex.h> 38 #include <sys/ioctl.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/kauth.h> 42 43 #include <dev/pci/pcidevs.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pciio.h> 47 48 #include <dev/wsfb/genfbvar.h> 49 50 #include "opt_wsfb.h" 51 #include "opt_genfb.h" 52 53 #ifdef GENFB_PCI_DEBUG 54 # define DPRINTF printf 55 #else 56 # define DPRINTF while (0) printf 57 #endif 58 59 struct range { 60 bus_addr_t offset; 61 bus_size_t size; 62 int flags; 63 }; 64 65 struct pci_genfb_softc { 66 struct genfb_softc sc_gen; 67 68 pci_chipset_tag_t sc_pc; 69 pcitag_t sc_pcitag; 70 bus_space_tag_t sc_memt; 71 bus_space_tag_t sc_iot; 72 bus_space_handle_t sc_memh; 73 pcireg_t sc_bars[9]; 74 struct range sc_ranges[8]; 75 int sc_ranges_used; 76 int sc_want_wsfb; 77 }; 78 79 static int pci_genfb_match(struct device *, struct cfdata *, void *); 80 static void pci_genfb_attach(struct device *, struct device *, void *); 81 static int pci_genfb_ioctl(void *, void *, u_long, void *, int, 82 struct lwp *); 83 static paddr_t pci_genfb_mmap(void *, void *, off_t, int); 84 static int pci_genfb_drm_print(void *, const char *); 85 86 87 CFATTACH_DECL(genfb_pci, sizeof(struct pci_genfb_softc), 88 pci_genfb_match, pci_genfb_attach, NULL, NULL); 89 90 static int 91 pci_genfb_match(struct device *parent, struct cfdata *match, void *aux) 92 { 93 struct pci_attach_args *pa = aux; 94 95 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 96 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 97 return 1; 98 99 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 100 return 1; 101 102 return 0; 103 } 104 105 static void 106 pci_genfb_attach(struct device *parent, struct device *self, void *aux) 107 { 108 struct pci_genfb_softc *sc = (struct pci_genfb_softc *)self; 109 struct pci_attach_args *pa = aux; 110 struct genfb_ops ops; 111 int idx, bar, type; 112 char devinfo[256]; 113 114 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 115 printf(": %s\n", devinfo); 116 117 sc->sc_memt = pa->pa_memt; 118 sc->sc_iot = pa->pa_iot; 119 sc->sc_pc = pa->pa_pc; 120 sc->sc_pcitag = pa->pa_tag; 121 sc->sc_want_wsfb = 0; 122 123 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 aprint_error_dev(self, "unable to map the framebuffer\n"); 135 return; 136 } 137 sc->sc_gen.sc_fbaddr = bus_space_vaddr(sc->sc_memt, sc->sc_memh); 138 139 /* mmap()able bus ranges */ 140 idx = 0; 141 bar = 0x10; 142 while (bar < 0x30) { 143 144 type = pci_mapreg_type(sc->sc_pc, sc->sc_pcitag, bar); 145 if ((type == PCI_MAPREG_TYPE_MEM) || 146 (type == PCI_MAPREG_TYPE_ROM)) { 147 148 pci_mapreg_info(sc->sc_pc, sc->sc_pcitag, bar, type, 149 &sc->sc_ranges[idx].offset, 150 &sc->sc_ranges[idx].size, 151 &sc->sc_ranges[idx].flags); 152 idx++; 153 } 154 sc->sc_bars[(bar - 0x10) >> 2] = 155 pci_conf_read(sc->sc_pc, sc->sc_pcitag, bar); 156 bar += 4; 157 } 158 sc->sc_ranges_used = idx; 159 160 ops.genfb_ioctl = pci_genfb_ioctl; 161 ops.genfb_mmap = pci_genfb_mmap; 162 163 if (genfb_attach(&sc->sc_gen, &ops) == 0) { 164 165 /* now try to attach a DRM */ 166 config_found_ia(self, "drm", aux, pci_genfb_drm_print); 167 } 168 } 169 170 static int 171 pci_genfb_drm_print(void *aux, const char *pnp) 172 { 173 if (pnp) 174 aprint_normal("drm at %s", pnp); 175 return (UNCONF); 176 } 177 178 179 static int 180 pci_genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 181 struct lwp *l) 182 { 183 struct pci_genfb_softc *sc = v; 184 185 switch (cmd) { 186 case WSDISPLAYIO_GTYPE: 187 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; 188 return 0; 189 190 /* PCI config read/write passthrough. */ 191 case PCI_IOC_CFGREAD: 192 case PCI_IOC_CFGWRITE: 193 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 194 cmd, data, flag, l)); 195 case WSDISPLAYIO_SMODE: 196 { 197 int new_mode = *(int*)data, i; 198 if (new_mode == WSDISPLAYIO_MODE_EMUL) { 199 for (i = 0; i < 9; i++) 200 pci_conf_write(sc->sc_pc, 201 sc->sc_pcitag, 202 0x10 + (i << 2), 203 sc->sc_bars[i]); 204 } 205 } 206 return 0; 207 } 208 209 return EPASSTHROUGH; 210 } 211 212 static paddr_t 213 pci_genfb_mmap(void *v, void *vs, off_t offset, int prot) 214 { 215 struct pci_genfb_softc *sc = v; 216 struct range *r; 217 struct lwp *me; 218 int i; 219 220 if (offset == 0) 221 sc->sc_want_wsfb = 1; 222 223 /* 224 * regular fb mapping at 0 225 * since some Sun firmware likes to put PCI resources low enough 226 * to collide with the wsfb mapping we only allow it after asking 227 * for offset 0 228 */ 229 DPRINTF("%s: %08x limit %08x\n", __func__, (uint32_t)offset, 230 (uint32_t)sc->sc_gen.sc_fbsize); 231 if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize) && 232 (sc->sc_want_wsfb == 1)) { 233 234 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 235 offset, prot, BUS_SPACE_MAP_LINEAR); 236 } 237 238 /* 239 * restrict all other mappings to processes with superuser privileges 240 * or the kernel itself 241 */ 242 me = curlwp; 243 if (me != NULL) { 244 if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, 245 NULL) != 0) { 246 aprint_normal_dev(&sc->sc_gen.sc_dev, "mmap() rejected.\n"); 247 return -1; 248 } 249 } 250 251 #ifdef WSFB_FAKE_VGA_FB 252 if ((offset >= 0xa0000) && (offset < 0xbffff)) { 253 254 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 255 offset - 0xa0000, prot, BUS_SPACE_MAP_LINEAR); 256 } 257 #endif 258 259 /* 260 * XXX this should be generalized, let's just 261 * #define PCI_IOAREA_PADDR 262 * #define PCI_IOAREA_OFFSET 263 * #define PCI_IOAREA_SIZE 264 * somewhere in a MD header and compile this code only if all are 265 * present 266 */ 267 #ifdef PCI_MAGIC_IO_RANGE 268 /* allow to map our IO space */ 269 if ((offset >= PCI_MAGIC_IO_RANGE) && 270 (offset < PCI_MAGIC_IO_RANGE + 0x10000)) { 271 return bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE, 272 0, prot, BUS_SPACE_MAP_LINEAR); 273 } 274 #endif 275 276 /* allow to mmap() our BARs */ 277 /* maybe the ROM BAR too? */ 278 for (i = 0; i < sc->sc_ranges_used; i++) { 279 280 r = &sc->sc_ranges[i]; 281 if ((offset >= r->offset) && (offset < (r->offset + r->size))) { 282 return bus_space_mmap(sc->sc_memt, offset, 0, prot, 283 r->flags); 284 } 285 } 286 287 return -1; 288 } 289
Indexes created Fri Sep 26 08:10:20 GMT 2025