/* $NetBSD: genfb_pci.c,v 1.4 2007/12/01 17:00:41 ad Exp $ */ /*- * Copyright (c) 2007 Michael Lorenz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: genfb_pci.c,v 1.4 2007/12/01 17:00:41 ad Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_wsfb.h" #include "opt_genfb.h" #ifdef GENFB_PCI_DEBUG # define DPRINTF printf #else # define DPRINTF while (0) printf #endif struct range { bus_addr_t offset; bus_size_t size; int flags; }; struct pci_genfb_softc { struct genfb_softc sc_gen; pci_chipset_tag_t sc_pc; pcitag_t sc_pcitag; bus_space_tag_t sc_memt; bus_space_tag_t sc_iot; bus_space_handle_t sc_memh; pcireg_t sc_bars[9]; struct range sc_ranges[8]; int sc_ranges_used; }; static int pci_genfb_match(struct device *, struct cfdata *, void *); static void pci_genfb_attach(struct device *, struct device *, void *); static int pci_genfb_ioctl(void *, void *, u_long, void *, int, struct lwp *); static paddr_t pci_genfb_mmap(void *, void *, off_t, int); static int pci_genfb_drm_print(void *, const char *); CFATTACH_DECL(genfb_pci, sizeof(struct pci_genfb_softc), pci_genfb_match, pci_genfb_attach, NULL, NULL); static int pci_genfb_match(struct device *parent, struct cfdata *match, void *aux) { struct pci_attach_args *pa = aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) return 1; if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) return 1; return 0; } static void pci_genfb_attach(struct device *parent, struct device *self, void *aux) { struct pci_genfb_softc *sc = (struct pci_genfb_softc *)self; struct pci_attach_args *pa = aux; struct genfb_ops ops; int idx, bar, type; char devinfo[256]; pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); printf(": %s\n", devinfo); sc->sc_memt = pa->pa_memt; sc->sc_iot = pa->pa_iot; sc->sc_pc = pa->pa_pc; sc->sc_pcitag = pa->pa_tag; genfb_init(&sc->sc_gen); if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) { aprint_error("%s: bogus parameters, unable to continue\n", device_xname(self)); return; } if (bus_space_map(sc->sc_memt, sc->sc_gen.sc_fboffset, sc->sc_gen.sc_fbsize, BUS_SPACE_MAP_LINEAR, &sc->sc_memh) != 0) { panic("%s: unable to map the framebuffer\n", self->dv_xname); } sc->sc_gen.sc_fbaddr = bus_space_vaddr(sc->sc_memt, sc->sc_memh); /* mmap()able bus ranges */ idx = 0; bar = 0x10; while (bar < 0x30) { type = pci_mapreg_type(sc->sc_pc, sc->sc_pcitag, bar); if ((type == PCI_MAPREG_TYPE_MEM) || (type == PCI_MAPREG_TYPE_ROM)) { pci_mapreg_info(sc->sc_pc, sc->sc_pcitag, bar, type, &sc->sc_ranges[idx].offset, &sc->sc_ranges[idx].size, &sc->sc_ranges[idx].flags); idx++; } sc->sc_bars[(bar - 0x10) >> 2] = pci_conf_read(sc->sc_pc, sc->sc_pcitag, bar); bar += 4; } sc->sc_ranges_used = idx; ops.genfb_ioctl = pci_genfb_ioctl; ops.genfb_mmap = pci_genfb_mmap; genfb_attach(&sc->sc_gen, &ops); /* now try to attach a DRM */ config_found_ia(self, "drm", aux, pci_genfb_drm_print); } static int pci_genfb_drm_print(void *aux, const char *pnp) { if (pnp) aprint_normal("direct rendering for %s", pnp); return (UNSUPP); } static int pci_genfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) { struct pci_genfb_softc *sc = v; switch (cmd) { case WSDISPLAYIO_GTYPE: *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; return 0; /* PCI config read/write passthrough. */ case PCI_IOC_CFGREAD: case PCI_IOC_CFGWRITE: return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, cmd, data, flag, l)); case WSDISPLAYIO_SMODE: { int new_mode = *(int*)data, i; if (new_mode == WSDISPLAYIO_MODE_EMUL) { for (i = 0; i < 9; i++) pci_conf_write(sc->sc_pc, sc->sc_pcitag, 0x10 + (i << 2), sc->sc_bars[i]); } } return 0; } return EPASSTHROUGH; } static paddr_t pci_genfb_mmap(void *v, void *vs, off_t offset, int prot) { struct pci_genfb_softc *sc = v; struct range *r; struct lwp *me; int i; /* regular fb mapping at 0 */ DPRINTF("%s: %08x limit %08x\n", __func__, (uint32_t)offset, (uint32_t)sc->sc_gen.sc_fbsize); if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize)) { return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, offset, prot, BUS_SPACE_MAP_LINEAR); } /* * restrict all other mappings to processes with superuser privileges * or the kernel itself */ me = curlwp; if (me != NULL) { if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, NULL) != 0) { aprint_normal("%s: mmap() rejected.\n", sc->sc_gen.sc_dev.dv_xname); return -1; } } #ifdef WSFB_FAKE_VGA_FB if ((offset >= 0xa0000) && (offset < 0xbffff)) { return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, offset - 0xa0000, prot, BUS_SPACE_MAP_LINEAR); } #endif /* * XXX this should be generalized, let's just * #define PCI_IOAREA_PADDR * #define PCI_IOAREA_OFFSET * #define PCI_IOAREA_SIZE * somewhere in a MD header and compile this code only if all are * present */ #ifdef macppc /* allow to map our IO space */ if ((offset >= 0xf2000000) && (offset < 0xf2800000)) { return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot, BUS_SPACE_MAP_LINEAR); } #endif /* allow to mmap() our BARs */ /* maybe the ROM BAR too? */ for (i = 0; i < sc->sc_ranges_used; i++) { r = &sc->sc_ranges[i]; if ((offset >= r->offset) && (offset < (r->offset + r->size))) { return bus_space_mmap(sc->sc_memt, offset, 0, prot, r->flags); } } return -1; }