76d9c62eb2
For non-PCI video devices, such as those found on many ARM embedded systems, the X server currently requires the BusID option to specify the full path to the DRM device's sysfs node in order to properly match it against the probed platform devices. In order to allow X to start up properly if either the BusID option was omitted or no configuration is present at all, the first video device is used by default. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com>
505 lines
14 KiB
C
505 lines
14 KiB
C
/*
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* Copyright © 2012 Red Hat.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Dave Airlie <airlied@redhat.com>
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*/
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/*
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* This file contains the interfaces to the bus-specific code
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#ifdef XSERVER_PLATFORM_BUS
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#include <errno.h>
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#include <pciaccess.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "os.h"
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#include "hotplug.h"
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#include "xf86.h"
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#include "xf86_OSproc.h"
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#include "xf86Priv.h"
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#include "xf86str.h"
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#include "xf86Bus.h"
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#include "Pci.h"
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#include "xf86platformBus.h"
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int platformSlotClaimed;
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int xf86_num_platform_devices;
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static struct xf86_platform_device *xf86_platform_devices;
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int
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xf86_add_platform_device(struct OdevAttributes *attribs)
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{
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xf86_platform_devices = xnfrealloc(xf86_platform_devices,
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(sizeof(struct xf86_platform_device)
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* (xf86_num_platform_devices + 1)));
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xf86_platform_devices[xf86_num_platform_devices].attribs = attribs;
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xf86_platform_devices[xf86_num_platform_devices].pdev = NULL;
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xf86_num_platform_devices++;
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return 0;
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}
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int
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xf86_remove_platform_device(int dev_index)
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{
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int j;
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config_odev_free_attribute_list(xf86_platform_devices[dev_index].attribs);
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for (j = dev_index; j < xf86_num_platform_devices - 1; j++)
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memcpy(&xf86_platform_devices[j], &xf86_platform_devices[j + 1], sizeof(struct xf86_platform_device));
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xf86_num_platform_devices--;
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return 0;
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}
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Bool
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xf86_add_platform_device_attrib(int index, int attrib_id, char *attrib_name)
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{
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struct xf86_platform_device *device = &xf86_platform_devices[index];
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return config_odev_add_attribute(device->attribs, attrib_id, attrib_name);
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}
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char *
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xf86_get_platform_attrib(int index, int attrib_id)
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{
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struct xf86_platform_device *device = &xf86_platform_devices[index];
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struct OdevAttribute *oa;
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xorg_list_for_each_entry(oa, &device->attribs->list, member) {
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if (oa->attrib_id == attrib_id)
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return oa->attrib_name;
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}
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return NULL;
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}
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char *
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xf86_get_platform_device_attrib(struct xf86_platform_device *device, int attrib_id)
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{
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struct OdevAttribute *oa;
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xorg_list_for_each_entry(oa, &device->attribs->list, member) {
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if (oa->attrib_id == attrib_id)
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return oa->attrib_name;
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}
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return NULL;
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}
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/*
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* xf86IsPrimaryPlatform() -- return TRUE if primary device
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* is a platform device and it matches this one.
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*/
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static Bool
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xf86IsPrimaryPlatform(struct xf86_platform_device *plat)
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{
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return ((primaryBus.type == BUS_PLATFORM) && (plat == primaryBus.id.plat));
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}
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static void
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platform_find_pci_info(struct xf86_platform_device *pd, char *busid)
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{
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struct pci_slot_match devmatch;
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struct pci_device *info;
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struct pci_device_iterator *iter;
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int ret;
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ret = sscanf(busid, "pci:%04x:%02x:%02x.%u",
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&devmatch.domain, &devmatch.bus, &devmatch.dev,
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&devmatch.func);
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if (ret != 4)
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return;
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iter = pci_slot_match_iterator_create(&devmatch);
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info = pci_device_next(iter);
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if (info) {
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pd->pdev = info;
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pci_device_probe(info);
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if (pci_device_is_boot_vga(info)) {
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primaryBus.type = BUS_PLATFORM;
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primaryBus.id.plat = pd;
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}
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}
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pci_iterator_destroy(iter);
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}
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static Bool
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xf86_check_platform_slot(const struct xf86_platform_device *pd)
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{
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int i;
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for (i = 0; i < xf86NumEntities; i++) {
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const EntityPtr u = xf86Entities[i];
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if (pd->pdev && u->bus.type == BUS_PCI)
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return !MATCH_PCI_DEVICES(pd->pdev, u->bus.id.pci);
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if ((u->bus.type == BUS_PLATFORM) && (pd == u->bus.id.plat)) {
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return FALSE;
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}
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}
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return TRUE;
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}
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/**
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* @return The numbers of found devices that match with the current system
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* drivers.
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*/
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int
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xf86PlatformMatchDriver(char *matches[], int nmatches)
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{
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int i, j = 0;
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struct pci_device *info = NULL;
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int pass = 0;
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for (pass = 0; pass < 2; pass++) {
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for (i = 0; i < xf86_num_platform_devices; i++) {
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if (xf86IsPrimaryPlatform(&xf86_platform_devices[i]) && (pass == 1))
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continue;
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else if (!xf86IsPrimaryPlatform(&xf86_platform_devices[i]) && (pass == 0))
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continue;
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info = xf86_platform_devices[i].pdev;
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#ifdef __linux__
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if (info)
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xf86MatchDriverFromFiles(matches, info->vendor_id, info->device_id);
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#endif
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for (j = 0; (j < nmatches) && (matches[j]); j++) {
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/* find end of matches list */
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}
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if ((info != NULL) && (j < nmatches)) {
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j += xf86VideoPtrToDriverList(info, &(matches[j]), nmatches - j);
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}
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}
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}
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return j;
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}
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int
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xf86platformProbe(void)
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{
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int i;
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Bool pci = TRUE;
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config_odev_probe(xf86PlatformDeviceProbe);
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if (!xf86scanpci()) {
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pci = FALSE;
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}
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for (i = 0; i < xf86_num_platform_devices; i++) {
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char *busid = xf86_get_platform_attrib(i, ODEV_ATTRIB_BUSID);
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if (pci && (strncmp(busid, "pci:", 4) == 0)) {
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platform_find_pci_info(&xf86_platform_devices[i], busid);
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}
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}
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return 0;
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}
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static int
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xf86ClaimPlatformSlot(struct xf86_platform_device * d, DriverPtr drvp,
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int chipset, GDevPtr dev, Bool active)
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{
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EntityPtr p = NULL;
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int num;
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if (xf86_check_platform_slot(d)) {
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num = xf86AllocateEntity();
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p = xf86Entities[num];
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p->driver = drvp;
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p->chipset = chipset;
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p->bus.type = BUS_PLATFORM;
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p->bus.id.plat = d;
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p->active = active;
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p->inUse = FALSE;
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if (dev)
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xf86AddDevToEntity(num, dev);
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platformSlotClaimed++;
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return num;
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}
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else
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return -1;
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}
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static int
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xf86UnclaimPlatformSlot(struct xf86_platform_device *d, GDevPtr dev)
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{
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int i;
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for (i = 0; i < xf86NumEntities; i++) {
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const EntityPtr p = xf86Entities[i];
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if ((p->bus.type == BUS_PLATFORM) && (p->bus.id.plat == d)) {
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if (dev)
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xf86RemoveDevFromEntity(i, dev);
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platformSlotClaimed--;
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p->bus.type = BUS_NONE;
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return 0;
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}
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}
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return 0;
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}
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#define END_OF_MATCHES(m) \
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(((m).vendor_id == 0) && ((m).device_id == 0) && ((m).subvendor_id == 0))
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static Bool doPlatformProbe(struct xf86_platform_device *dev, DriverPtr drvp,
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GDevPtr gdev, int flags, intptr_t match_data)
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{
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Bool foundScreen = FALSE;
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int entity;
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if (gdev->screen == 0 && !xf86_check_platform_slot(dev))
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return FALSE;
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entity = xf86ClaimPlatformSlot(dev, drvp, 0,
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gdev, gdev->active);
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if ((entity == -1) && (gdev->screen > 0)) {
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unsigned nent;
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for (nent = 0; nent < xf86NumEntities; nent++) {
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EntityPtr pEnt = xf86Entities[nent];
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if (pEnt->bus.type != BUS_PLATFORM)
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continue;
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if (pEnt->bus.id.plat == dev) {
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entity = nent;
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xf86AddDevToEntity(nent, gdev);
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break;
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}
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}
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}
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if (entity != -1) {
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if (drvp->platformProbe(drvp, entity, flags, dev, match_data))
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foundScreen = TRUE;
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else
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xf86UnclaimPlatformSlot(dev, gdev);
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}
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return foundScreen;
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}
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static Bool
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probeSingleDevice(struct xf86_platform_device *dev, DriverPtr drvp, GDevPtr gdev, int flags)
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{
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int k;
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Bool foundScreen = FALSE;
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struct pci_device *pPci;
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const struct pci_id_match *const devices = drvp->supported_devices;
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if (dev->pdev && devices) {
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int device_id = dev->pdev->device_id;
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pPci = dev->pdev;
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for (k = 0; !END_OF_MATCHES(devices[k]); k++) {
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if (PCI_ID_COMPARE(devices[k].vendor_id, pPci->vendor_id)
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&& PCI_ID_COMPARE(devices[k].device_id, device_id)
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&& ((devices[k].device_class_mask & pPci->device_class)
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== devices[k].device_class)) {
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foundScreen = doPlatformProbe(dev, drvp, gdev, flags, devices[k].match_data);
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if (foundScreen)
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break;
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}
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}
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}
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else if (dev->pdev && !devices)
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return FALSE;
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else
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foundScreen = doPlatformProbe(dev, drvp, gdev, flags, 0);
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return foundScreen;
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}
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int
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xf86platformProbeDev(DriverPtr drvp)
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{
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Bool foundScreen = FALSE;
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GDevPtr *devList;
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const unsigned numDevs = xf86MatchDevice(drvp->driverName, &devList);
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int i, j;
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/* find the main device or any device specificed in xorg.conf */
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for (i = 0; i < numDevs; i++) {
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for (j = 0; j < xf86_num_platform_devices; j++) {
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if (devList[i]->busID && *devList[i]->busID) {
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if (xf86PlatformDeviceCheckBusID(&xf86_platform_devices[j], devList[i]->busID))
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break;
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}
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else {
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/* for non-seat0 servers assume first device is the master */
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if (ServerIsNotSeat0())
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break;
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if (xf86_platform_devices[j].pdev) {
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if (xf86IsPrimaryPlatform(&xf86_platform_devices[j]))
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break;
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}
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}
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}
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if (j == xf86_num_platform_devices)
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continue;
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foundScreen = probeSingleDevice(&xf86_platform_devices[j], drvp, devList[i], 0);
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if (!foundScreen)
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continue;
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}
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/*
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* If all of the above fails, which can happen if X was started without
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* configuration or if BusID wasn't set for non-PCI devices, use the first
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* device by default.
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*/
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if (!foundScreen && xf86_num_platform_devices > 0 && numDevs > 0)
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foundScreen = probeSingleDevice(&xf86_platform_devices[0], drvp, devList[0], 0);
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/* if autoaddgpu devices is enabled then go find a few more and add them as GPU screens */
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if (xf86Info.autoAddGPU && numDevs) {
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for (j = 0; j < xf86_num_platform_devices; j++) {
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probeSingleDevice(&xf86_platform_devices[j], drvp, devList[0], PLATFORM_PROBE_GPU_SCREEN);
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}
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}
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return foundScreen;
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}
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int
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xf86platformAddDevice(int index)
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{
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int i, old_screens, scr_index;
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DriverPtr drvp = NULL;
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int entity;
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screenLayoutPtr layout;
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static char *hotplug_driver_name = "modesetting";
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/* force load the driver for now */
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xf86LoadOneModule(hotplug_driver_name, NULL);
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for (i = 0; i < xf86NumDrivers; i++) {
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if (!xf86DriverList[i])
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continue;
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if (!strcmp(xf86DriverList[i]->driverName, hotplug_driver_name)) {
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drvp = xf86DriverList[i];
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break;
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}
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}
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if (i == xf86NumDrivers)
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return -1;
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old_screens = xf86NumGPUScreens;
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entity = xf86ClaimPlatformSlot(&xf86_platform_devices[index],
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drvp, 0, 0, 0);
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if (!drvp->platformProbe(drvp, entity, PLATFORM_PROBE_GPU_SCREEN, &xf86_platform_devices[index], 0)) {
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xf86UnclaimPlatformSlot(&xf86_platform_devices[index], NULL);
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}
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if (old_screens == xf86NumGPUScreens)
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return -1;
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i = old_screens;
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for (layout = xf86ConfigLayout.screens; layout->screen != NULL;
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layout++) {
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xf86GPUScreens[i]->confScreen = layout->screen;
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break;
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}
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if (xf86GPUScreens[i]->PreInit &&
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xf86GPUScreens[i]->PreInit(xf86GPUScreens[i], 0))
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xf86GPUScreens[i]->configured = TRUE;
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if (!xf86GPUScreens[i]->configured) {
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ErrorF("hotplugged device %d didn't configure\n", i);
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xf86DeleteScreen(xf86GPUScreens[i]);
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return -1;
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}
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scr_index = AddGPUScreen(xf86GPUScreens[i]->ScreenInit, 0, NULL);
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dixSetPrivate(&xf86GPUScreens[i]->pScreen->devPrivates,
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xf86ScreenKey, xf86GPUScreens[i]);
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CreateScratchPixmapsForScreen(xf86GPUScreens[i]->pScreen);
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/* attach unbound to 0 protocol screen */
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AttachUnboundGPU(xf86Screens[0]->pScreen, xf86GPUScreens[i]->pScreen);
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return 0;
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}
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void
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xf86platformRemoveDevice(int index)
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{
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EntityPtr entity;
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int ent_num, i, j;
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Bool found;
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for (ent_num = 0; ent_num < xf86NumEntities; ent_num++) {
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entity = xf86Entities[ent_num];
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if (entity->bus.type == BUS_PLATFORM &&
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entity->bus.id.plat == &xf86_platform_devices[index])
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break;
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}
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if (ent_num == xf86NumEntities)
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goto out;
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found = FALSE;
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for (i = 0; i < xf86NumGPUScreens; i++) {
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for (j = 0; j < xf86GPUScreens[i]->numEntities; j++)
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if (xf86GPUScreens[i]->entityList[j] == ent_num) {
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found = TRUE;
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break;
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}
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if (found)
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break;
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}
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if (!found) {
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ErrorF("failed to find screen to remove\n");
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goto out;
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}
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xf86GPUScreens[i]->pScreen->CloseScreen(xf86GPUScreens[i]->pScreen);
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RemoveGPUScreen(xf86GPUScreens[i]->pScreen);
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xf86DeleteScreen(xf86GPUScreens[i]);
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xf86UnclaimPlatformSlot(&xf86_platform_devices[index], NULL);
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xf86_remove_platform_device(index);
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out:
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return;
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}
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#endif
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