| 1 | /* $NetBSD: drmfb_pci.c,v 1.3 2015/03/05 20:19:30 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2014 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Taylor R. Campbell. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 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 | /* |
| 33 | * drmfb_pci: drmfb hooks for PCI devices. |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | __KERNEL_RCSID(0, "$NetBSD: drmfb_pci.c,v 1.3 2015/03/05 20:19:30 christos Exp $" ); |
| 38 | |
| 39 | #ifdef _KERNEL_OPT |
| 40 | #include "vga.h" |
| 41 | #endif |
| 42 | |
| 43 | #include <sys/types.h> |
| 44 | #include <sys/device.h> |
| 45 | #include <sys/errno.h> |
| 46 | #include <sys/systm.h> |
| 47 | |
| 48 | #include <dev/pci/pciio.h> |
| 49 | #include <dev/pci/pcireg.h> |
| 50 | #include <dev/pci/pcivar.h> |
| 51 | #include <dev/pci/wsdisplay_pci.h> |
| 52 | |
| 53 | #if NVGA > 0 |
| 54 | /* |
| 55 | * XXX All we really need is vga_is_console from vgavar.h, but the |
| 56 | * header files are missing their own dependencies, so we need to |
| 57 | * explicitly drag in the other crap. |
| 58 | */ |
| 59 | #include <dev/ic/mc6845reg.h> |
| 60 | #include <dev/ic/pcdisplayvar.h> |
| 61 | #include <dev/ic/vgareg.h> |
| 62 | #include <dev/ic/vgavar.h> |
| 63 | #endif |
| 64 | |
| 65 | #include <drm/drmP.h> |
| 66 | #include <drm/drm_fb_helper.h> |
| 67 | |
| 68 | #include <drm/drmfb.h> |
| 69 | #include <drm/drmfb_pci.h> |
| 70 | |
| 71 | /* |
| 72 | * drmfb_pci_mmap: Implementation of drmfb_params::dp_mmap. Don't use |
| 73 | * this for dp_mmapfb -- how to get at the framebuffer is device- |
| 74 | * specific. |
| 75 | */ |
| 76 | paddr_t |
| 77 | drmfb_pci_mmap(struct drmfb_softc *sc, off_t offset, int prot) |
| 78 | { |
| 79 | struct drm_device *const dev = sc->sc_da.da_fb_helper->dev; |
| 80 | const struct pci_attach_args *const pa = &dev->pdev->pd_pa; |
| 81 | unsigned i; |
| 82 | |
| 83 | for (i = 0; PCI_BAR(i) <= PCI_MAPREG_ROM; i++) { |
| 84 | pcireg_t type; |
| 85 | bus_addr_t addr; |
| 86 | bus_size_t size; |
| 87 | int flags; |
| 88 | |
| 89 | /* Interrogate the BAR. */ |
| 90 | if (!pci_mapreg_probe(pa->pa_pc, pa->pa_tag, PCI_BAR(i), |
| 91 | &type)) |
| 92 | continue; |
| 93 | if (PCI_MAPREG_TYPE(type) != PCI_MAPREG_TYPE_MEM) |
| 94 | continue; |
| 95 | if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, PCI_BAR(i), type, |
| 96 | &addr, &size, &flags)) |
| 97 | continue; |
| 98 | |
| 99 | /* Try to map it if it's in range. */ |
| 100 | if ((addr <= offset) && (offset < (addr + size))) |
| 101 | return bus_space_mmap(pa->pa_memt, addr, |
| 102 | (offset - addr), prot, flags); |
| 103 | |
| 104 | /* Skip a slot if this was a 64-bit BAR. */ |
| 105 | if ((PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_MEM) && |
| 106 | (PCI_MAPREG_MEM_TYPE(type) == PCI_MAPREG_MEM_TYPE_64BIT)) |
| 107 | i += 1; |
| 108 | } |
| 109 | |
| 110 | /* Failure! */ |
| 111 | return -1; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * drmfb_pci_ioctl: Implementation of drmfb_params::dp_ioctl. Provides: |
| 116 | * |
| 117 | * - WSDISPLAY_GET_BUSID |
| 118 | * - WSDISPLAY_GTYPE |
| 119 | * |
| 120 | * Additionally allows access to PCI registers. |
| 121 | * |
| 122 | * XXX Do we need to provide access to PCI registers? I can't find |
| 123 | * anything that uses this functionality, and as is it is very |
| 124 | * dangerous. |
| 125 | */ |
| 126 | int |
| 127 | drmfb_pci_ioctl(struct drmfb_softc *sc, unsigned long cmd, void *data, |
| 128 | int flag, struct lwp *l) |
| 129 | { |
| 130 | struct drm_device *const dev = sc->sc_da.da_fb_helper->dev; |
| 131 | struct pci_attach_args *const pa = &dev->pdev->pd_pa; |
| 132 | |
| 133 | switch (cmd) { |
| 134 | /* PCI config read/write passthrough. */ |
| 135 | case PCI_IOC_CFGREAD: |
| 136 | case PCI_IOC_CFGWRITE: |
| 137 | return pci_devioctl(pa->pa_pc, pa->pa_tag, cmd, data, flag, l); |
| 138 | |
| 139 | /* PCI-specific wsdisplay ioctls. */ |
| 140 | case WSDISPLAYIO_GET_BUSID: |
| 141 | return wsdisplayio_busid_pci(dev->dev, pa->pa_pc, pa->pa_tag, |
| 142 | data); |
| 143 | case WSDISPLAYIO_GTYPE: |
| 144 | *(unsigned int *)data = WSDISPLAY_TYPE_PCIVGA; |
| 145 | return 0; |
| 146 | |
| 147 | default: |
| 148 | return EPASSTHROUGH; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | bool |
| 153 | drmfb_pci_is_vga_console(struct drm_device *dev) |
| 154 | { |
| 155 | |
| 156 | #if NVGA > 0 |
| 157 | return vga_is_console(dev->pdev->pd_pa.pa_iot, -1); |
| 158 | #else |
| 159 | return false; |
| 160 | #endif |
| 161 | } |
| 162 | |