genfb_pci.c revision 1.1.18.5
1 1.1.18.5 yamt /* $NetBSD: genfb_pci.c,v 1.1.18.5 2008/03/17 09:15:11 yamt Exp $ */ 2 1.1.18.2 yamt 3 1.1.18.2 yamt /*- 4 1.1.18.2 yamt * Copyright (c) 2007 Michael Lorenz 5 1.1.18.2 yamt * All rights reserved. 6 1.1.18.2 yamt * 7 1.1.18.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.1.18.2 yamt * modification, are permitted provided that the following conditions 9 1.1.18.2 yamt * are met: 10 1.1.18.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.1.18.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.1.18.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.18.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.1.18.2 yamt * documentation and/or other materials provided with the distribution. 15 1.1.18.2 yamt * 3. Neither the name of The NetBSD Foundation nor the names of its 16 1.1.18.2 yamt * contributors may be used to endorse or promote products derived 17 1.1.18.2 yamt * from this software without specific prior written permission. 18 1.1.18.2 yamt * 19 1.1.18.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.18.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.18.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.18.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.18.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.18.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.18.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.18.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.18.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.18.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.18.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.1.18.2 yamt */ 31 1.1.18.2 yamt 32 1.1.18.2 yamt #include <sys/cdefs.h> 33 1.1.18.5 yamt __KERNEL_RCSID(0, "$NetBSD: genfb_pci.c,v 1.1.18.5 2008/03/17 09:15:11 yamt Exp $"); 34 1.1.18.2 yamt 35 1.1.18.2 yamt #include <sys/param.h> 36 1.1.18.2 yamt #include <sys/systm.h> 37 1.1.18.2 yamt #include <sys/kernel.h> 38 1.1.18.2 yamt #include <sys/device.h> 39 1.1.18.2 yamt #include <sys/proc.h> 40 1.1.18.2 yamt #include <sys/mutex.h> 41 1.1.18.2 yamt #include <sys/ioctl.h> 42 1.1.18.2 yamt #include <sys/kernel.h> 43 1.1.18.2 yamt #include <sys/systm.h> 44 1.1.18.2 yamt #include <sys/kauth.h> 45 1.1.18.2 yamt 46 1.1.18.2 yamt #include <dev/pci/pcidevs.h> 47 1.1.18.2 yamt #include <dev/pci/pcireg.h> 48 1.1.18.2 yamt #include <dev/pci/pcivar.h> 49 1.1.18.2 yamt #include <dev/pci/pciio.h> 50 1.1.18.2 yamt 51 1.1.18.2 yamt #include <dev/wsfb/genfbvar.h> 52 1.1.18.2 yamt 53 1.1.18.2 yamt #include "opt_wsfb.h" 54 1.1.18.2 yamt #include "opt_genfb.h" 55 1.1.18.2 yamt 56 1.1.18.3 yamt #ifdef GENFB_PCI_DEBUG 57 1.1.18.3 yamt # define DPRINTF printf 58 1.1.18.3 yamt #else 59 1.1.18.3 yamt # define DPRINTF while (0) printf 60 1.1.18.3 yamt #endif 61 1.1.18.3 yamt 62 1.1.18.2 yamt struct range { 63 1.1.18.2 yamt bus_addr_t offset; 64 1.1.18.2 yamt bus_size_t size; 65 1.1.18.2 yamt int flags; 66 1.1.18.2 yamt }; 67 1.1.18.2 yamt 68 1.1.18.2 yamt struct pci_genfb_softc { 69 1.1.18.2 yamt struct genfb_softc sc_gen; 70 1.1.18.2 yamt 71 1.1.18.2 yamt pci_chipset_tag_t sc_pc; 72 1.1.18.2 yamt pcitag_t sc_pcitag; 73 1.1.18.2 yamt bus_space_tag_t sc_memt; 74 1.1.18.2 yamt bus_space_tag_t sc_iot; 75 1.1.18.2 yamt bus_space_handle_t sc_memh; 76 1.1.18.3 yamt pcireg_t sc_bars[9]; 77 1.1.18.2 yamt struct range sc_ranges[8]; 78 1.1.18.2 yamt int sc_ranges_used; 79 1.1.18.4 yamt int sc_want_wsfb; 80 1.1.18.2 yamt }; 81 1.1.18.2 yamt 82 1.1.18.2 yamt static int pci_genfb_match(struct device *, struct cfdata *, void *); 83 1.1.18.2 yamt static void pci_genfb_attach(struct device *, struct device *, void *); 84 1.1.18.2 yamt static int pci_genfb_ioctl(void *, void *, u_long, void *, int, 85 1.1.18.2 yamt struct lwp *); 86 1.1.18.2 yamt static paddr_t pci_genfb_mmap(void *, void *, off_t, int); 87 1.1.18.3 yamt static int pci_genfb_drm_print(void *, const char *); 88 1.1.18.3 yamt 89 1.1.18.2 yamt 90 1.1.18.2 yamt CFATTACH_DECL(genfb_pci, sizeof(struct pci_genfb_softc), 91 1.1.18.2 yamt pci_genfb_match, pci_genfb_attach, NULL, NULL); 92 1.1.18.2 yamt 93 1.1.18.2 yamt static int 94 1.1.18.2 yamt pci_genfb_match(struct device *parent, struct cfdata *match, void *aux) 95 1.1.18.2 yamt { 96 1.1.18.2 yamt struct pci_attach_args *pa = aux; 97 1.1.18.2 yamt 98 1.1.18.2 yamt if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 99 1.1.18.2 yamt PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 100 1.1.18.2 yamt return 1; 101 1.1.18.2 yamt 102 1.1.18.2 yamt if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 103 1.1.18.2 yamt return 1; 104 1.1.18.2 yamt 105 1.1.18.2 yamt return 0; 106 1.1.18.2 yamt } 107 1.1.18.2 yamt 108 1.1.18.2 yamt static void 109 1.1.18.2 yamt pci_genfb_attach(struct device *parent, struct device *self, void *aux) 110 1.1.18.2 yamt { 111 1.1.18.2 yamt struct pci_genfb_softc *sc = (struct pci_genfb_softc *)self; 112 1.1.18.2 yamt struct pci_attach_args *pa = aux; 113 1.1.18.2 yamt struct genfb_ops ops; 114 1.1.18.2 yamt int idx, bar, type; 115 1.1.18.2 yamt char devinfo[256]; 116 1.1.18.2 yamt 117 1.1.18.2 yamt pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 118 1.1.18.2 yamt printf(": %s\n", devinfo); 119 1.1.18.2 yamt 120 1.1.18.2 yamt sc->sc_memt = pa->pa_memt; 121 1.1.18.2 yamt sc->sc_iot = pa->pa_iot; 122 1.1.18.2 yamt sc->sc_pc = pa->pa_pc; 123 1.1.18.2 yamt sc->sc_pcitag = pa->pa_tag; 124 1.1.18.4 yamt sc->sc_want_wsfb = 0; 125 1.1.18.4 yamt 126 1.1.18.2 yamt genfb_init(&sc->sc_gen); 127 1.1.18.2 yamt 128 1.1.18.3 yamt if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) { 129 1.1.18.3 yamt aprint_error("%s: bogus parameters, unable to continue\n", 130 1.1.18.3 yamt device_xname(self)); 131 1.1.18.3 yamt return; 132 1.1.18.3 yamt } 133 1.1.18.3 yamt 134 1.1.18.2 yamt if (bus_space_map(sc->sc_memt, sc->sc_gen.sc_fboffset, 135 1.1.18.2 yamt sc->sc_gen.sc_fbsize, BUS_SPACE_MAP_LINEAR, &sc->sc_memh) != 0) { 136 1.1.18.2 yamt 137 1.1.18.2 yamt panic("%s: unable to map the framebuffer\n", self->dv_xname); 138 1.1.18.2 yamt } 139 1.1.18.2 yamt sc->sc_gen.sc_fbaddr = bus_space_vaddr(sc->sc_memt, sc->sc_memh); 140 1.1.18.2 yamt 141 1.1.18.2 yamt /* mmap()able bus ranges */ 142 1.1.18.2 yamt idx = 0; 143 1.1.18.2 yamt bar = 0x10; 144 1.1.18.2 yamt while (bar < 0x30) { 145 1.1.18.2 yamt 146 1.1.18.2 yamt type = pci_mapreg_type(sc->sc_pc, sc->sc_pcitag, bar); 147 1.1.18.2 yamt if ((type == PCI_MAPREG_TYPE_MEM) || 148 1.1.18.2 yamt (type == PCI_MAPREG_TYPE_ROM)) { 149 1.1.18.2 yamt 150 1.1.18.2 yamt pci_mapreg_info(sc->sc_pc, sc->sc_pcitag, bar, type, 151 1.1.18.2 yamt &sc->sc_ranges[idx].offset, 152 1.1.18.2 yamt &sc->sc_ranges[idx].size, 153 1.1.18.2 yamt &sc->sc_ranges[idx].flags); 154 1.1.18.2 yamt idx++; 155 1.1.18.2 yamt } 156 1.1.18.3 yamt sc->sc_bars[(bar - 0x10) >> 2] = 157 1.1.18.3 yamt pci_conf_read(sc->sc_pc, sc->sc_pcitag, bar); 158 1.1.18.2 yamt bar += 4; 159 1.1.18.2 yamt } 160 1.1.18.2 yamt sc->sc_ranges_used = idx; 161 1.1.18.2 yamt 162 1.1.18.2 yamt ops.genfb_ioctl = pci_genfb_ioctl; 163 1.1.18.2 yamt ops.genfb_mmap = pci_genfb_mmap; 164 1.1.18.2 yamt 165 1.1.18.5 yamt if (genfb_attach(&sc->sc_gen, &ops) == 0) { 166 1.1.18.3 yamt 167 1.1.18.5 yamt /* now try to attach a DRM */ 168 1.1.18.5 yamt config_found_ia(self, "drm", aux, pci_genfb_drm_print); 169 1.1.18.5 yamt } 170 1.1.18.2 yamt } 171 1.1.18.2 yamt 172 1.1.18.2 yamt static int 173 1.1.18.3 yamt pci_genfb_drm_print(void *aux, const char *pnp) 174 1.1.18.3 yamt { 175 1.1.18.3 yamt if (pnp) 176 1.1.18.3 yamt aprint_normal("direct rendering for %s", pnp); 177 1.1.18.3 yamt return (UNSUPP); 178 1.1.18.3 yamt } 179 1.1.18.3 yamt 180 1.1.18.3 yamt 181 1.1.18.3 yamt static int 182 1.1.18.2 yamt pci_genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 183 1.1.18.2 yamt struct lwp *l) 184 1.1.18.2 yamt { 185 1.1.18.2 yamt struct pci_genfb_softc *sc = v; 186 1.1.18.2 yamt 187 1.1.18.2 yamt switch (cmd) { 188 1.1.18.2 yamt case WSDISPLAYIO_GTYPE: 189 1.1.18.2 yamt *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; 190 1.1.18.2 yamt return 0; 191 1.1.18.2 yamt 192 1.1.18.2 yamt /* PCI config read/write passthrough. */ 193 1.1.18.2 yamt case PCI_IOC_CFGREAD: 194 1.1.18.2 yamt case PCI_IOC_CFGWRITE: 195 1.1.18.2 yamt return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 196 1.1.18.2 yamt cmd, data, flag, l)); 197 1.1.18.3 yamt case WSDISPLAYIO_SMODE: 198 1.1.18.3 yamt { 199 1.1.18.3 yamt int new_mode = *(int*)data, i; 200 1.1.18.3 yamt if (new_mode == WSDISPLAYIO_MODE_EMUL) { 201 1.1.18.3 yamt for (i = 0; i < 9; i++) 202 1.1.18.3 yamt pci_conf_write(sc->sc_pc, 203 1.1.18.3 yamt sc->sc_pcitag, 204 1.1.18.3 yamt 0x10 + (i << 2), 205 1.1.18.3 yamt sc->sc_bars[i]); 206 1.1.18.3 yamt } 207 1.1.18.3 yamt } 208 1.1.18.3 yamt return 0; 209 1.1.18.2 yamt } 210 1.1.18.2 yamt 211 1.1.18.2 yamt return EPASSTHROUGH; 212 1.1.18.2 yamt } 213 1.1.18.2 yamt 214 1.1.18.2 yamt static paddr_t 215 1.1.18.2 yamt pci_genfb_mmap(void *v, void *vs, off_t offset, int prot) 216 1.1.18.2 yamt { 217 1.1.18.2 yamt struct pci_genfb_softc *sc = v; 218 1.1.18.2 yamt struct range *r; 219 1.1.18.2 yamt struct lwp *me; 220 1.1.18.2 yamt int i; 221 1.1.18.2 yamt 222 1.1.18.4 yamt if (offset == 0) 223 1.1.18.4 yamt sc->sc_want_wsfb = 1; 224 1.1.18.4 yamt 225 1.1.18.4 yamt /* 226 1.1.18.4 yamt * regular fb mapping at 0 227 1.1.18.4 yamt * since some Sun firmware likes to put PCI resources low enough 228 1.1.18.4 yamt * to collide with the wsfb mapping we only allow it after asking 229 1.1.18.4 yamt * for offset 0 230 1.1.18.4 yamt */ 231 1.1.18.3 yamt DPRINTF("%s: %08x limit %08x\n", __func__, (uint32_t)offset, 232 1.1.18.3 yamt (uint32_t)sc->sc_gen.sc_fbsize); 233 1.1.18.4 yamt if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize) && 234 1.1.18.4 yamt (sc->sc_want_wsfb == 1)) { 235 1.1.18.2 yamt 236 1.1.18.2 yamt return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 237 1.1.18.2 yamt offset, prot, BUS_SPACE_MAP_LINEAR); 238 1.1.18.2 yamt } 239 1.1.18.2 yamt 240 1.1.18.2 yamt /* 241 1.1.18.2 yamt * restrict all other mappings to processes with superuser privileges 242 1.1.18.2 yamt * or the kernel itself 243 1.1.18.2 yamt */ 244 1.1.18.2 yamt me = curlwp; 245 1.1.18.2 yamt if (me != NULL) { 246 1.1.18.2 yamt if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, 247 1.1.18.2 yamt NULL) != 0) { 248 1.1.18.2 yamt aprint_normal("%s: mmap() rejected.\n", 249 1.1.18.2 yamt sc->sc_gen.sc_dev.dv_xname); 250 1.1.18.2 yamt return -1; 251 1.1.18.2 yamt } 252 1.1.18.2 yamt } 253 1.1.18.2 yamt 254 1.1.18.2 yamt #ifdef WSFB_FAKE_VGA_FB 255 1.1.18.2 yamt if ((offset >= 0xa0000) && (offset < 0xbffff)) { 256 1.1.18.2 yamt 257 1.1.18.2 yamt return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, 258 1.1.18.2 yamt offset - 0xa0000, prot, BUS_SPACE_MAP_LINEAR); 259 1.1.18.2 yamt } 260 1.1.18.2 yamt #endif 261 1.1.18.2 yamt 262 1.1.18.2 yamt /* 263 1.1.18.2 yamt * XXX this should be generalized, let's just 264 1.1.18.2 yamt * #define PCI_IOAREA_PADDR 265 1.1.18.2 yamt * #define PCI_IOAREA_OFFSET 266 1.1.18.2 yamt * #define PCI_IOAREA_SIZE 267 1.1.18.2 yamt * somewhere in a MD header and compile this code only if all are 268 1.1.18.2 yamt * present 269 1.1.18.2 yamt */ 270 1.1.18.5 yamt #ifdef PCI_MAGIC_IO_RANGE 271 1.1.18.2 yamt /* allow to map our IO space */ 272 1.1.18.5 yamt if ((offset >= PCI_MAGIC_IO_RANGE) && 273 1.1.18.5 yamt (offset < PCI_MAGIC_IO_RANGE + 0x10000)) { 274 1.1.18.5 yamt return bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE, 275 1.1.18.5 yamt 0, prot, BUS_SPACE_MAP_LINEAR); 276 1.1.18.2 yamt } 277 1.1.18.2 yamt #endif 278 1.1.18.2 yamt 279 1.1.18.2 yamt /* allow to mmap() our BARs */ 280 1.1.18.3 yamt /* maybe the ROM BAR too? */ 281 1.1.18.2 yamt for (i = 0; i < sc->sc_ranges_used; i++) { 282 1.1.18.2 yamt 283 1.1.18.2 yamt r = &sc->sc_ranges[i]; 284 1.1.18.2 yamt if ((offset >= r->offset) && (offset < (r->offset + r->size))) { 285 1.1.18.2 yamt return bus_space_mmap(sc->sc_memt, offset, 0, prot, 286 1.1.18.2 yamt r->flags); 287 1.1.18.2 yamt } 288 1.1.18.2 yamt } 289 1.1.18.2 yamt 290 1.1.18.2 yamt return -1; 291 1.1.18.2 yamt } 292
Indexes created Wed Oct 01 19:09:53 GMT 2025