2 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * Simple driver for PCI VGA display devices. Drivers such as agp(4) and
35 * drm(4) should attach as children of this device.
37 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver
41 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/module.h>
46 #include <sys/systm.h>
48 #include <dev/pci/pcireg.h>
49 #include <dev/pci/pcivar.h>
52 struct resource *vr_res;
56 struct vga_pci_softc {
57 device_t vga_msi_child; /* Child driver using MSI. */
58 struct vga_resource vga_res[PCIR_MAX_BAR_0 + 1];
62 vga_pci_probe(device_t dev)
65 switch (pci_get_class(dev)) {
69 if (pci_get_subclass(dev) != PCIS_OLD_VGA)
75 device_set_desc(dev, "VGA-compatible display");
76 return (BUS_PROBE_GENERIC);
80 vga_pci_attach(device_t dev)
83 bus_generic_probe(dev);
85 /* Always create a drm child for now to make it easier on drm. */
86 device_add_child(dev, "drm", -1);
87 bus_generic_attach(dev);
92 vga_pci_suspend(device_t dev)
95 return (bus_generic_suspend(dev));
99 vga_pci_resume(device_t dev)
102 return (bus_generic_resume(dev));
108 vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
111 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
115 vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
122 vga_pci_setup_intr(device_t dev, device_t child, struct resource *irq,
123 int flags, driver_filter_t *filter, driver_intr_t *intr, void *arg,
126 return (BUS_SETUP_INTR(device_get_parent(dev), dev, irq, flags,
127 filter, intr, arg, cookiep));
131 vga_pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
134 return (BUS_TEARDOWN_INTR(device_get_parent(dev), dev, irq, cookie));
137 static struct resource *
138 vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
139 u_long start, u_long end, u_long count, u_int flags)
141 struct vga_pci_softc *sc;
148 * For BARs, we cache the resource so that we only allocate it
149 * from the PCI bus once.
151 bar = PCI_RID2BAR(*rid);
152 if (bar < 0 || bar > PCIR_MAX_BAR_0)
154 sc = device_get_softc(dev);
155 if (sc->vga_res[bar].vr_res == NULL)
156 sc->vga_res[bar].vr_res = bus_alloc_resource(dev, type,
157 rid, start, end, count, flags);
158 if (sc->vga_res[bar].vr_res != NULL)
159 sc->vga_res[bar].vr_refs++;
160 return (sc->vga_res[bar].vr_res);
162 return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
166 vga_pci_release_resource(device_t dev, device_t child, int type, int rid,
169 struct vga_pci_softc *sc;
176 * For BARs, we release the resource from the PCI bus
177 * when the last child reference goes away.
179 bar = PCI_RID2BAR(rid);
180 if (bar < 0 || bar > PCIR_MAX_BAR_0)
182 sc = device_get_softc(dev);
183 if (sc->vga_res[bar].vr_res == NULL)
185 KASSERT(sc->vga_res[bar].vr_res == r,
186 ("vga_pci resource mismatch"));
187 if (sc->vga_res[bar].vr_refs > 1) {
188 sc->vga_res[bar].vr_refs--;
191 KASSERT(sc->vga_res[bar].vr_refs > 0,
192 ("vga_pci resource reference count underflow"));
193 error = bus_release_resource(dev, type, rid, r);
195 sc->vga_res[bar].vr_res = NULL;
196 sc->vga_res[bar].vr_refs = 0;
201 return (bus_release_resource(dev, type, rid, r));
207 vga_pci_read_config(device_t dev, device_t child, int reg, int width)
210 return (pci_read_config(dev, reg, width));
214 vga_pci_write_config(device_t dev, device_t child, int reg,
215 uint32_t val, int width)
218 pci_write_config(dev, reg, val, width);
222 vga_pci_enable_busmaster(device_t dev, device_t child)
225 device_printf(dev, "child %s requested pci_enable_busmaster\n",
226 device_get_nameunit(child));
227 return (pci_enable_busmaster(dev));
231 vga_pci_disable_busmaster(device_t dev, device_t child)
234 device_printf(dev, "child %s requested pci_disable_busmaster\n",
235 device_get_nameunit(child));
236 return (pci_disable_busmaster(dev));
240 vga_pci_enable_io(device_t dev, device_t child, int space)
243 device_printf(dev, "child %s requested pci_enable_io\n",
244 device_get_nameunit(child));
245 return (pci_enable_io(dev, space));
249 vga_pci_disable_io(device_t dev, device_t child, int space)
252 device_printf(dev, "child %s requested pci_disable_io\n",
253 device_get_nameunit(child));
254 return (pci_disable_io(dev, space));
258 vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr)
261 return (pci_get_vpd_ident(dev, identptr));
265 vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw,
269 return (pci_get_vpd_readonly(dev, kw, vptr));
273 vga_pci_set_powerstate(device_t dev, device_t child, int state)
276 device_printf(dev, "child %s requested pci_set_powerstate\n",
277 device_get_nameunit(child));
278 return (pci_set_powerstate(dev, state));
282 vga_pci_get_powerstate(device_t dev, device_t child)
285 device_printf(dev, "child %s requested pci_get_powerstate\n",
286 device_get_nameunit(child));
287 return (pci_get_powerstate(dev));
291 vga_pci_assign_interrupt(device_t dev, device_t child)
294 device_printf(dev, "child %s requested pci_assign_interrupt\n",
295 device_get_nameunit(child));
296 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
300 vga_pci_find_extcap(device_t dev, device_t child, int capability,
304 return (pci_find_extcap(dev, capability, capreg));
308 vga_pci_alloc_msi(device_t dev, device_t child, int *count)
310 struct vga_pci_softc *sc;
313 sc = device_get_softc(dev);
314 if (sc->vga_msi_child != NULL)
316 error = pci_alloc_msi(dev, count);
318 sc->vga_msi_child = child;
323 vga_pci_alloc_msix(device_t dev, device_t child, int *count)
325 struct vga_pci_softc *sc;
328 sc = device_get_softc(dev);
329 if (sc->vga_msi_child != NULL)
331 error = pci_alloc_msix(dev, count);
333 sc->vga_msi_child = child;
338 vga_pci_remap_msix(device_t dev, device_t child, int count,
339 const u_int *vectors)
341 struct vga_pci_softc *sc;
343 sc = device_get_softc(dev);
344 if (sc->vga_msi_child != child)
346 return (pci_remap_msix(dev, count, vectors));
350 vga_pci_release_msi(device_t dev, device_t child)
352 struct vga_pci_softc *sc;
355 sc = device_get_softc(dev);
356 if (sc->vga_msi_child != child)
358 error = pci_release_msi(dev);
360 sc->vga_msi_child = NULL;
365 vga_pci_msi_count(device_t dev, device_t child)
368 return (pci_msi_count(dev));
372 vga_pci_msix_count(device_t dev, device_t child)
375 return (pci_msix_count(dev));
378 static device_method_t vga_pci_methods[] = {
379 /* Device interface */
380 DEVMETHOD(device_probe, vga_pci_probe),
381 DEVMETHOD(device_attach, vga_pci_attach),
382 DEVMETHOD(device_shutdown, bus_generic_shutdown),
383 DEVMETHOD(device_suspend, vga_pci_suspend),
384 DEVMETHOD(device_resume, vga_pci_resume),
387 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar),
388 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar),
389 DEVMETHOD(bus_setup_intr, vga_pci_setup_intr),
390 DEVMETHOD(bus_teardown_intr, vga_pci_teardown_intr),
392 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource),
393 DEVMETHOD(bus_release_resource, vga_pci_release_resource),
394 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
395 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
398 DEVMETHOD(pci_read_config, vga_pci_read_config),
399 DEVMETHOD(pci_write_config, vga_pci_write_config),
400 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster),
401 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster),
402 DEVMETHOD(pci_enable_io, vga_pci_enable_io),
403 DEVMETHOD(pci_disable_io, vga_pci_disable_io),
404 DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident),
405 DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly),
406 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate),
407 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate),
408 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt),
409 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap),
410 DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi),
411 DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix),
412 DEVMETHOD(pci_remap_msix, vga_pci_remap_msix),
413 DEVMETHOD(pci_release_msi, vga_pci_release_msi),
414 DEVMETHOD(pci_msi_count, vga_pci_msi_count),
415 DEVMETHOD(pci_msix_count, vga_pci_msix_count),
420 static driver_t vga_pci_driver = {
423 sizeof(struct vga_pci_softc),
426 static devclass_t vga_devclass;
428 DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0);