| 1 | /* $NetBSD: vga_pci.c,v 1.55 2016/07/07 06:55:41 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1995, 1996 Carnegie-Mellon University. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Author: Chris G. Demetriou |
| 8 | * |
| 9 | * Permission to use, copy, modify and distribute this software and |
| 10 | * its documentation is hereby granted, provided that both the copyright |
| 11 | * notice and this permission notice appear in all copies of the |
| 12 | * software, derivative works or modified versions, and any portions |
| 13 | * thereof, and that both notices appear in supporting documentation. |
| 14 | * |
| 15 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| 16 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND |
| 17 | * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| 18 | * |
| 19 | * Carnegie Mellon requests users of this software to return to |
| 20 | * |
| 21 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| 22 | * School of Computer Science |
| 23 | * Carnegie Mellon University |
| 24 | * Pittsburgh PA 15213-3890 |
| 25 | * |
| 26 | * any improvements or extensions that they make and grant Carnegie the |
| 27 | * rights to redistribute these changes. |
| 28 | */ |
| 29 | |
| 30 | #include <sys/cdefs.h> |
| 31 | __KERNEL_RCSID(0, "$NetBSD: vga_pci.c,v 1.55 2016/07/07 06:55:41 msaitoh Exp $" ); |
| 32 | |
| 33 | #include <sys/param.h> |
| 34 | #include <sys/systm.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/device.h> |
| 37 | #include <sys/malloc.h> |
| 38 | |
| 39 | #include <dev/pci/pcireg.h> |
| 40 | #include <dev/pci/pcivar.h> |
| 41 | #include <dev/pci/pcidevs.h> |
| 42 | #include <dev/pci/pciio.h> |
| 43 | |
| 44 | #include <dev/ic/mc6845reg.h> |
| 45 | #include <dev/ic/pcdisplayvar.h> |
| 46 | #include <dev/ic/vgareg.h> |
| 47 | #include <dev/ic/vgavar.h> |
| 48 | #include <dev/pci/vga_pcivar.h> |
| 49 | |
| 50 | #include <dev/isa/isareg.h> /* For legacy VGA address ranges */ |
| 51 | |
| 52 | #include <dev/wscons/wsconsio.h> |
| 53 | #include <dev/wscons/wsdisplayvar.h> |
| 54 | #include <dev/pci/wsdisplay_pci.h> |
| 55 | |
| 56 | #include "opt_vga.h" |
| 57 | |
| 58 | #ifdef VGA_POST |
| 59 | # if defined(__i386__) || defined(__amd64__) |
| 60 | # include "acpica.h" |
| 61 | # endif |
| 62 | #include <x86/vga_post.h> |
| 63 | #endif |
| 64 | |
| 65 | #define NBARS 6 /* number of PCI BARs */ |
| 66 | |
| 67 | struct vga_bar { |
| 68 | bus_addr_t vb_base; |
| 69 | bus_size_t vb_size; |
| 70 | pcireg_t vb_type; |
| 71 | int vb_flags; |
| 72 | }; |
| 73 | |
| 74 | struct vga_pci_softc { |
| 75 | struct vga_softc sc_vga; |
| 76 | |
| 77 | pci_chipset_tag_t sc_pc; |
| 78 | pcitag_t sc_pcitag; |
| 79 | |
| 80 | struct vga_bar sc_bars[NBARS]; |
| 81 | struct vga_bar sc_rom; |
| 82 | |
| 83 | #ifdef VGA_POST |
| 84 | struct vga_post *sc_posth; |
| 85 | #endif |
| 86 | |
| 87 | struct pci_attach_args sc_paa; |
| 88 | }; |
| 89 | |
| 90 | static int vga_pci_match(device_t, cfdata_t, void *); |
| 91 | static void vga_pci_attach(device_t, device_t, void *); |
| 92 | static int vga_pci_rescan(device_t, const char *, const int *); |
| 93 | static int vga_pci_lookup_quirks(struct pci_attach_args *); |
| 94 | static bool vga_pci_resume(device_t dv, const pmf_qual_t *); |
| 95 | |
| 96 | CFATTACH_DECL2_NEW(vga_pci, sizeof(struct vga_pci_softc), |
| 97 | vga_pci_match, vga_pci_attach, NULL, NULL, vga_pci_rescan, NULL); |
| 98 | |
| 99 | static int vga_pci_ioctl(void *, u_long, void *, int, struct lwp *); |
| 100 | static paddr_t vga_pci_mmap(void *, off_t, int); |
| 101 | |
| 102 | static const struct vga_funcs vga_pci_funcs = { |
| 103 | vga_pci_ioctl, |
| 104 | vga_pci_mmap, |
| 105 | }; |
| 106 | |
| 107 | static const struct { |
| 108 | int id; |
| 109 | int quirks; |
| 110 | } vga_pci_quirks[] = { |
| 111 | {PCI_ID_CODE(PCI_VENDOR_SILMOTION, PCI_PRODUCT_SILMOTION_SM712), |
| 112 | VGA_QUIRK_NOFASTSCROLL}, |
| 113 | {PCI_ID_CODE(PCI_VENDOR_CYRIX, PCI_PRODUCT_CYRIX_CX5530_VIDEO), |
| 114 | VGA_QUIRK_NOFASTSCROLL}, |
| 115 | }; |
| 116 | |
| 117 | static const struct { |
| 118 | int vid; |
| 119 | int quirks; |
| 120 | } vga_pci_vquirks[] = { |
| 121 | {PCI_VENDOR_ATI, VGA_QUIRK_ONEFONT}, |
| 122 | }; |
| 123 | |
| 124 | static int |
| 125 | vga_pci_lookup_quirks(struct pci_attach_args *pa) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | for (i = 0; i < sizeof(vga_pci_quirks) / sizeof (vga_pci_quirks[0]); |
| 130 | i++) { |
| 131 | if (vga_pci_quirks[i].id == pa->pa_id) |
| 132 | return (vga_pci_quirks[i].quirks); |
| 133 | } |
| 134 | for (i = 0; i < sizeof(vga_pci_vquirks) / sizeof (vga_pci_vquirks[0]); |
| 135 | i++) { |
| 136 | if (vga_pci_vquirks[i].vid == PCI_VENDOR(pa->pa_id)) |
| 137 | return (vga_pci_vquirks[i].quirks); |
| 138 | } |
| 139 | return (0); |
| 140 | } |
| 141 | |
| 142 | static int |
| 143 | vga_pci_match(device_t parent, cfdata_t match, void *aux) |
| 144 | { |
| 145 | struct pci_attach_args *pa = aux; |
| 146 | int potential; |
| 147 | |
| 148 | potential = 0; |
| 149 | |
| 150 | /* |
| 151 | * If it's prehistoric/vga or display/vga, we might match. |
| 152 | * For the console device, this is just a sanity check. |
| 153 | */ |
| 154 | if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC && |
| 155 | PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA) |
| 156 | potential = 1; |
| 157 | if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && |
| 158 | PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) |
| 159 | potential = 1; |
| 160 | |
| 161 | if (!potential) |
| 162 | return (0); |
| 163 | |
| 164 | /* check whether it is disabled by firmware */ |
| 165 | if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
| 166 | & (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) |
| 167 | != (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) |
| 168 | return (0); |
| 169 | |
| 170 | /* If it's the console, we have a winner! */ |
| 171 | if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA)) |
| 172 | return (1); |
| 173 | |
| 174 | /* |
| 175 | * If we might match, make sure that the card actually looks OK. |
| 176 | */ |
| 177 | if (!vga_common_probe(pa->pa_iot, pa->pa_memt)) |
| 178 | return (0); |
| 179 | |
| 180 | return (1); |
| 181 | } |
| 182 | |
| 183 | static void |
| 184 | vga_pci_attach(device_t parent, device_t self, void *aux) |
| 185 | { |
| 186 | struct vga_pci_softc *psc = device_private(self); |
| 187 | struct vga_softc *sc = &psc->sc_vga; |
| 188 | struct pci_attach_args *pa = aux; |
| 189 | int bar, reg; |
| 190 | |
| 191 | sc->sc_dev = self; |
| 192 | psc->sc_pc = pa->pa_pc; |
| 193 | psc->sc_pcitag = pa->pa_tag; |
| 194 | psc->sc_paa = *pa; |
| 195 | |
| 196 | pci_aprint_devinfo(pa, NULL); |
| 197 | |
| 198 | /* |
| 199 | * Gather info about all the BARs. These are used to allow |
| 200 | * the X server to map the VGA device. |
| 201 | */ |
| 202 | for (bar = 0; bar < NBARS; bar++) { |
| 203 | reg = PCI_MAPREG_START + (bar * 4); |
| 204 | if (!pci_mapreg_probe(psc->sc_pc, psc->sc_pcitag, reg, |
| 205 | &psc->sc_bars[bar].vb_type)) { |
| 206 | /* there is no valid mapping register */ |
| 207 | continue; |
| 208 | } |
| 209 | if (PCI_MAPREG_TYPE(psc->sc_bars[bar].vb_type) == |
| 210 | PCI_MAPREG_TYPE_IO) { |
| 211 | /* Don't bother fetching I/O BARs. */ |
| 212 | continue; |
| 213 | } |
| 214 | #ifndef __LP64__ |
| 215 | if (PCI_MAPREG_MEM_TYPE(psc->sc_bars[bar].vb_type) == |
| 216 | PCI_MAPREG_MEM_TYPE_64BIT) { |
| 217 | /* XXX */ |
| 218 | aprint_error_dev(self, |
| 219 | "WARNING: ignoring 64-bit BAR @ 0x%02x\n" , reg); |
| 220 | bar++; |
| 221 | continue; |
| 222 | } |
| 223 | #endif |
| 224 | if (pci_mapreg_info(psc->sc_pc, psc->sc_pcitag, reg, |
| 225 | psc->sc_bars[bar].vb_type, |
| 226 | &psc->sc_bars[bar].vb_base, |
| 227 | &psc->sc_bars[bar].vb_size, |
| 228 | &psc->sc_bars[bar].vb_flags)) |
| 229 | aprint_error_dev(self, |
| 230 | "WARNING: strange BAR @ 0x%02x\n" , reg); |
| 231 | } |
| 232 | |
| 233 | /* XXX Expansion ROM? */ |
| 234 | |
| 235 | vga_common_attach(sc, pa->pa_iot, pa->pa_memt, WSDISPLAY_TYPE_PCIVGA, |
| 236 | vga_pci_lookup_quirks(pa), &vga_pci_funcs); |
| 237 | |
| 238 | #ifdef VGA_POST |
| 239 | psc->sc_posth = vga_post_init(pa->pa_bus, pa->pa_device, |
| 240 | pa->pa_function); |
| 241 | if (psc->sc_posth == NULL) |
| 242 | aprint_error_dev(self, |
| 243 | "WARNING: could not prepare POST handler\n" ); |
| 244 | #endif |
| 245 | |
| 246 | /* |
| 247 | * XXX Do not use the generic PCI framework for now as |
| 248 | * XXX it would power down the device when the console |
| 249 | * XXX is still using it. |
| 250 | */ |
| 251 | if (!pmf_device_register(self, NULL, vga_pci_resume)) |
| 252 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 253 | config_found_ia(self, "drm" , aux, vga_drm_print); |
| 254 | } |
| 255 | |
| 256 | static int |
| 257 | vga_pci_rescan(device_t self, const char *ifattr, const int *locators) |
| 258 | { |
| 259 | struct vga_pci_softc *psc = device_private(self); |
| 260 | |
| 261 | config_found_ia(self, "drm" , &psc->sc_paa, vga_drm_print); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | static bool |
| 267 | vga_pci_resume(device_t dv, const pmf_qual_t *qual) |
| 268 | { |
| 269 | #if defined(VGA_POST) && NACPICA > 0 |
| 270 | extern int acpi_md_vbios_reset; |
| 271 | #endif |
| 272 | struct vga_pci_softc *sc = device_private(dv); |
| 273 | |
| 274 | vga_resume(&sc->sc_vga); |
| 275 | |
| 276 | #if defined(VGA_POST) && NACPICA > 0 |
| 277 | if (sc->sc_posth != NULL && acpi_md_vbios_reset == 2) |
| 278 | vga_post_call(sc->sc_posth); |
| 279 | #endif |
| 280 | |
| 281 | return true; |
| 282 | } |
| 283 | |
| 284 | int |
| 285 | vga_pci_cnattach(bus_space_tag_t iot, bus_space_tag_t memt, |
| 286 | pci_chipset_tag_t pc, int bus, int device, |
| 287 | int function) |
| 288 | { |
| 289 | |
| 290 | return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0)); |
| 291 | } |
| 292 | |
| 293 | int |
| 294 | vga_drm_print(void *aux, const char *pnp) |
| 295 | { |
| 296 | if (pnp) |
| 297 | aprint_normal("drm at %s" , pnp); |
| 298 | return (UNCONF); |
| 299 | } |
| 300 | |
| 301 | |
| 302 | static int |
| 303 | vga_pci_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l) |
| 304 | { |
| 305 | struct vga_config *vc = v; |
| 306 | struct vga_pci_softc *psc = (void *) vc->softc; |
| 307 | |
| 308 | switch (cmd) { |
| 309 | /* PCI config read/write passthrough. */ |
| 310 | case PCI_IOC_CFGREAD: |
| 311 | case PCI_IOC_CFGWRITE: |
| 312 | return pci_devioctl(psc->sc_pc, psc->sc_pcitag, |
| 313 | cmd, data, flag, l); |
| 314 | |
| 315 | case WSDISPLAYIO_GET_BUSID: |
| 316 | return wsdisplayio_busid_pci(vc->softc->sc_dev, |
| 317 | psc->sc_pc, psc->sc_pcitag, data); |
| 318 | |
| 319 | default: |
| 320 | return EPASSTHROUGH; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | static paddr_t |
| 325 | vga_pci_mmap(void *v, off_t offset, int prot) |
| 326 | { |
| 327 | struct vga_config *vc = v; |
| 328 | struct vga_pci_softc *psc = (void *) vc->softc; |
| 329 | struct vga_bar *vb; |
| 330 | int bar; |
| 331 | |
| 332 | for (bar = 0; bar < NBARS; bar++) { |
| 333 | vb = &psc->sc_bars[bar]; |
| 334 | if (vb->vb_size == 0) |
| 335 | continue; |
| 336 | if (offset >= vb->vb_base && |
| 337 | offset < (vb->vb_base + vb->vb_size)) { |
| 338 | /* XXX This the right thing to do with flags? */ |
| 339 | return (bus_space_mmap(vc->hdl.vh_memt, vb->vb_base, |
| 340 | (offset - vb->vb_base), prot, vb->vb_flags)); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /* XXX Expansion ROM? */ |
| 345 | |
| 346 | /* |
| 347 | * Allow mmap access to the legacy ISA hole. This is where |
| 348 | * the legacy video BIOS will be located, and also where |
| 349 | * the legacy VGA display buffer is located. |
| 350 | * |
| 351 | * XXX Security implications, here? |
| 352 | */ |
| 353 | if (offset >= IOM_BEGIN && offset < IOM_END) |
| 354 | return (bus_space_mmap(vc->hdl.vh_memt, IOM_BEGIN, |
| 355 | (offset - IOM_BEGIN), prot, 0)); |
| 356 | |
| 357 | #ifdef PCI_MAGIC_IO_RANGE |
| 358 | /* allow to map our IO space on non-x86 machines */ |
| 359 | if ((offset >= PCI_MAGIC_IO_RANGE) && |
| 360 | (offset < PCI_MAGIC_IO_RANGE + 0x10000)) { |
| 361 | return bus_space_mmap(vc->hdl.vh_iot, |
| 362 | offset - PCI_MAGIC_IO_RANGE, |
| 363 | 0, prot, BUS_SPACE_MAP_LINEAR); |
| 364 | } |
| 365 | #endif |
| 366 | |
| 367 | /* Range not found. */ |
| 368 | return (-1); |
| 369 | } |
| 370 | |