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Add information needed by Linux libdrm 2.4.74 (shipped with CentOS 7.4).

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Create a config file for PCI devices that exposes their configuration
space.  Only fields needed by libdrm are filled in (vendor, device,
revision, subvendor and subdevice).

Link /sys/class/drm/card%d/device to the PCI device directory.
This commit is contained in:
Tijl Coosemans 2017-10-15 19:28:14 +00:00
parent df4c975275
commit 03cea61b3a
1 changed files with 62 additions and 22 deletions
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84
sys/compat/linsysfs/linsysfs.c
View File

@ -175,6 +175,33 @@ linsysfs_fill_revid(PFS_FILL_ARGS)
return (0);
}
static int
linsysfs_fill_config(PFS_FILL_ARGS)
{
uint8_t config[48];
device_t dev;
uint32_t reg;
dev = (device_t)pn->pn_data;
bzero(config, sizeof(config));
reg = pci_get_vendor(dev);
config[0] = reg;
config[1] = reg >> 8;
reg = pci_get_device(dev);
config[2] = reg;
config[3] = reg >> 8;
reg = pci_get_revid(dev);
config[8] = reg;
reg = pci_get_subvendor(dev);
config[44] = reg;
config[45] = reg >> 8;
reg = pci_get_subdevice(dev);
config[46] = reg;
config[47] = reg >> 8;
sbuf_bcat(sb, config, sizeof(config));
return (0);
}
/*
* Filler function for PCI uevent file
*/
@ -247,20 +274,20 @@ linsysfs_fill_vgapci(PFS_FILL_ARGS)
#define PCI_DEV "pci"
#define DRMN_DEV "drmn"
static int
linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, struct pfs_node *chardev,
char *path, char *prefix)
linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi,
struct pfs_node *chardev, struct pfs_node *drm, char *path, char *prefix)
{
struct scsi_host_queue *scsi_host;
struct pfs_node *sub_dir, *cur_file, *cur_chardev;
struct pfs_node *sub_dir, *cur_file;
int i, nchildren, error;
device_t *children, parent;
devclass_t devclass;
const char *name = NULL;
struct pci_devinfo *dinfo;
char *device, *host, *new_path, *chardevname;
char *device, *host, *new_path, *devname;
new_path = path;
chardevname = malloc(16, M_TEMP, M_WAITOK);
devname = malloc(16, M_TEMP, M_WAITOK);
parent = device_get_parent(dev);
if (parent) {
@ -308,6 +335,10 @@ linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, stru
&linsysfs_fill_revid, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "config",
&linsysfs_fill_config, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "uevent",
&linsysfs_fill_uevent_pci, NULL, NULL,
NULL, PFS_RD);
@ -362,18 +393,26 @@ linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, stru
device_get_unit(dev) >= 0) {
dinfo = device_get_ivars(parent);
if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) {
sprintf(chardevname, "226:%d",
sprintf(devname, "226:%d",
device_get_unit(dev));
cur_chardev = pfs_create_dir(chardev,
chardevname, NULL, NULL, NULL, 0);
cur_file = pfs_create_link(cur_chardev,
sub_dir = pfs_create_dir(chardev,
devname, NULL, NULL, NULL, 0);
cur_file = pfs_create_link(sub_dir,
"device", &linsysfs_fill_vgapci, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dir;
cur_file = pfs_create_file(cur_chardev,
cur_file = pfs_create_file(sub_dir,
"uevent", &linsysfs_fill_uevent_drm, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dev;
sprintf(devname, "card%d",
device_get_unit(dev));
sub_dir = pfs_create_dir(drm,
devname, NULL, NULL, NULL, 0);
cur_file = pfs_create_link(sub_dir,
"device", &linsysfs_fill_vgapci, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dir;
}
}
}
@ -383,12 +422,12 @@ linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, stru
for (i = 0; i < nchildren; i++)
if (children[i])
linsysfs_run_bus(children[i], dir, scsi,
chardev, new_path, prefix);
chardev, drm, new_path, prefix);
free(children, M_TEMP);
}
if (new_path != path)
free(new_path, M_TEMP);
free(chardevname, M_TEMP);
free(devname, M_TEMP);
return (1);
}
@ -449,7 +488,9 @@ static int
linsysfs_init(PFS_INIT_ARGS)
{
struct pfs_node *root;
struct pfs_node *class;
struct pfs_node *dir, *sys, *cpu;
struct pfs_node *drm;
struct pfs_node *pci;
struct pfs_node *scsi;
struct pfs_node *devdir, *chardev;
@ -461,26 +502,25 @@ linsysfs_init(PFS_INIT_ARGS)
root = pi->pi_root;
/* /sys/class/... */
scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0);
class = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0);
drm = pfs_create_dir(class, "drm", NULL, NULL, NULL, 0);
/* /sys/devices */
dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
/* /sys/devices/pci0000:00 */
pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
/* /sys/dev/char */
/* /sys/dev/... */
devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0);
chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0);
/* /sys/devices/... */
dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
devclass = devclass_find("root");
if (devclass == NULL) {
return (0);
}
dev = devclass_get_device(devclass, 0);
linsysfs_run_bus(dev, pci, scsi, chardev, "/pci0000:00", "0000");
linsysfs_run_bus(dev, pci, scsi, chardev, drm, "/pci0000:00", "0000");
/* /sys/devices/system */
sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0);