linsysfs(5): Add support for recent libdrm
Expose more information about PCI devices (and GPUs in particular) via linsysfs to libdrm. This allows unmodified modern 64-bit Linux libdrm to work, which allows modern Linux Mesa to work. The submitter reports that he tested the change with an Ubuntu 16.04 chroot + amdgpu from graphics/drm-next-kmod. PR: 222375 Submitted by: Greg V <greg AT unrelenting.technology>
This commit is contained in:
Conrad Meyer
parent
d18915fadb
commit
2d347b2ef8
@ -133,19 +133,134 @@ linsysfs_link_scsi_host(PFS_FILL_ARGS)
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return (0);
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}
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#define PCI_DEV "pci"
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static int
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linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char *path,
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char *prefix)
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linsysfs_fill_data(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "%s", pn->pn_data);
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return (0);
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}
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static int
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linsysfs_fill_vendor(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "0x%04x\n", pci_get_vendor((device_t)pn->pn_data));
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return (0);
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}
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static int
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linsysfs_fill_device(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "0x%04x\n", pci_get_device((device_t)pn->pn_data));
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return (0);
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}
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static int
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linsysfs_fill_subvendor(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "0x%04x\n", pci_get_subvendor((device_t)pn->pn_data));
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return (0);
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}
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static int
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linsysfs_fill_subdevice(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "0x%04x\n", pci_get_subdevice((device_t)pn->pn_data));
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return (0);
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}
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static int
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linsysfs_fill_revid(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "0x%x\n", pci_get_revid((device_t)pn->pn_data));
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return (0);
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}
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/*
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* Filler function for PCI uevent file
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*/
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static int
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linsysfs_fill_uevent_pci(PFS_FILL_ARGS)
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{
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device_t dev;
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dev = (device_t)pn->pn_data;
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sbuf_printf(sb, "DRIVER=%s\nPCI_CLASS=%X\nPCI_ID=%04X:%04X\n"
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"PCI_SUBSYS_ID=%04X:%04X\nPCI_SLOT_NAME=%04d:%02x:%02x.%x\n",
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linux_driver_get_name_dev(dev), pci_get_class(dev),
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pci_get_vendor(dev), pci_get_device(dev), pci_get_subvendor(dev),
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pci_get_subdevice(dev), pci_get_domain(dev), pci_get_bus(dev),
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pci_get_slot(dev), pci_get_function(dev));
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return (0);
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}
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/*
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* Filler function for drm uevent file
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*/
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static int
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linsysfs_fill_uevent_drm(PFS_FILL_ARGS)
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{
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device_t dev;
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int unit;
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dev = (device_t)pn->pn_data;
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unit = device_get_unit(dev);
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sbuf_printf(sb,
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"MAJOR=226\nMINOR=%d\nDEVNAME=drm/%d\nDEVTYPE=dri_minor\n", unit,
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unit);
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return (0);
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}
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static char *
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get_full_pfs_path(struct pfs_node *cur)
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{
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char *temp, *path;
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temp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
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path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
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path[0] = '\0';
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do {
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snprintf(temp, MAXPATHLEN, "%s/%s", cur->pn_name, path);
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strlcpy(path, temp, MAXPATHLEN);
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cur = cur->pn_parent;
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} while (cur->pn_parent != NULL);
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path[strlen(path) - 1] = '\0'; /* remove extra slash */
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free(temp, M_TEMP);
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return (path);
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}
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/*
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* Filler function for symlink from drm char device to PCI device
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*/
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static int
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linsysfs_fill_vgapci(PFS_FILL_ARGS)
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{
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char *path;
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path = get_full_pfs_path((struct pfs_node*)pn->pn_data);
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sbuf_printf(sb, "../../../%s", path);
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free(path, M_TEMP);
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return (0);
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}
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#define PCI_DEV "pci"
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#define DRMN_DEV "drmn"
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static int
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linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, struct pfs_node *chardev,
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char *path, char *prefix)
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{
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struct scsi_host_queue *scsi_host;
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struct pfs_node *sub_dir;
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struct pfs_node *sub_dir, *cur_file, *cur_chardev;
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int i, nchildren;
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device_t *children, parent;
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devclass_t devclass;
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const char *name = NULL;
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struct pci_devinfo *dinfo;
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char *device, *host, *new_path = path;
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char *device, *host, *new_path, *chardevname;
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new_path = path;
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chardevname = malloc(16, M_TEMP, M_WAITOK);
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parent = device_get_parent(dev);
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if (parent) {
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@ -171,6 +286,36 @@ linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char
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strcat(new_path, device);
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dir = pfs_create_dir(dir, device,
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NULL, NULL, NULL, 0);
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cur_file = pfs_create_file(dir, "vendor",
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&linsysfs_fill_vendor, NULL, NULL, NULL,
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PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_file(dir, "device",
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&linsysfs_fill_device, NULL, NULL, NULL,
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PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_file(dir,
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"subsystem_vendor",
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&linsysfs_fill_subvendor, NULL, NULL, NULL,
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PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_file(dir,
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"subsystem_device",
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&linsysfs_fill_subdevice, NULL, NULL, NULL,
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PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_file(dir, "revision",
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&linsysfs_fill_revid, NULL, NULL, NULL,
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PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_file(dir, "uevent",
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&linsysfs_fill_uevent_pci, NULL, NULL,
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NULL, PFS_RD);
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cur_file->pn_data = (void*)dev;
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cur_file = pfs_create_link(dir, "subsystem",
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&linsysfs_fill_data, NULL, NULL, NULL, 0);
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/* libdrm just checks that the link ends in "/pci" */
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cur_file->pn_data = "/sys/bus/pci";
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if (dinfo->cfg.baseclass == PCIC_STORAGE) {
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/* DJA only make this if needed */
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@ -207,15 +352,38 @@ linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char
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free(host, M_TEMP);
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}
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}
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dinfo = device_get_ivars(parent);
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if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) {
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devclass = device_get_devclass(dev);
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if (devclass != NULL)
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name = devclass_get_name(devclass);
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if (name != NULL && strcmp(name, DRMN_DEV) == 0 &&
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device_get_unit(dev) >= 0) {
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sprintf(chardevname, "226:%d",
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device_get_unit(dev));
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cur_chardev = pfs_create_dir(chardev,
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chardevname, NULL, NULL, NULL, 0);
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cur_file = pfs_create_link(cur_chardev,
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"device", &linsysfs_fill_vgapci, NULL,
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NULL, NULL, PFS_RD);
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cur_file->pn_data = (void*)dir;
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cur_file = pfs_create_file(cur_chardev,
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"uevent", &linsysfs_fill_uevent_drm, NULL,
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NULL, NULL, PFS_RD);
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cur_file->pn_data = (void*)dev;
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}
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}
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}
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device_get_children(dev, &children, &nchildren);
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for (i = 0; i < nchildren; i++) {
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if (children[i])
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linsysfs_run_bus(children[i], dir, scsi, new_path, prefix);
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linsysfs_run_bus(children[i], dir, scsi, chardev, new_path, prefix);
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}
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if (new_path != path)
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free(new_path, M_TEMP);
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free(chardevname, M_TEMP);
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return (1);
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}
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@ -279,6 +447,7 @@ linsysfs_init(PFS_INIT_ARGS)
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struct pfs_node *dir, *sys, *cpu;
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struct pfs_node *pci;
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struct pfs_node *scsi;
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struct pfs_node *devdir, *chardev;
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devclass_t devclass;
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device_t dev;
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@ -296,13 +465,17 @@ linsysfs_init(PFS_INIT_ARGS)
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/* /sys/devices/pci0000:00 */
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pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
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/* /sys/dev/char */
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devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0);
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chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0);
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devclass = devclass_find("root");
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if (devclass == NULL) {
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return (0);
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}
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dev = devclass_get_device(devclass, 0);
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linsysfs_run_bus(dev, pci, scsi, "/pci0000:00", "0000");
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linsysfs_run_bus(dev, pci, scsi, chardev, "/pci0000:00", "0000");
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/* /sys/devices/system */
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sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0);
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@ -127,14 +127,13 @@ int
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linux_driver_get_major_minor(const char *node, int *major, int *minor)
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{
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struct device_element *de;
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unsigned long devno;
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if (node == NULL || major == NULL || minor == NULL)
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return 1;
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if (strlen(node) > strlen("pts/") &&
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strncmp(node, "pts/", strlen("pts/")) == 0) {
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unsigned long devno;
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/*
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* Linux checks major and minors of the slave device
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* to make sure it's a pty device, so let's make him
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@ -147,6 +146,15 @@ linux_driver_get_major_minor(const char *node, int *major, int *minor)
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return (0);
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}
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if ((strlen(node) > strlen("drm/") &&
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strncmp(node, "drm/", strlen("drm/")) == 0) ) {
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devno = strtoul(node + strlen("drm/"), NULL, 10);
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*major = 226 + (devno / 256);
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*minor = devno % 256;
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return (0);
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}
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TAILQ_FOREACH(de, &devices, list) {
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if (strcmp(node, de->entry.bsd_device_name) == 0) {
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*major = de->entry.linux_major;
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