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