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sparc64: add MDESC node name property to VIO device metadata

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Add the MDESC node name of MDESC client to VIO device metadata. It is
later used to uniquely identify a node in the MDESC. VIO & MDESC APIs
are updated to handle this node name.

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jag Raman 2017-06-23 14:58:34 -04:00 committed by David S. Miller
parent 0ab2fcd69d
commit 06f3c3ac60
4 changed files with 65 additions and 48 deletions
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7
arch/sparc/include/asm/mdesc.h
View File

@ -63,9 +63,10 @@ u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc);
void mdesc_update(void);
struct mdesc_notifier_client {
void (*add)(struct mdesc_handle *handle, u64 node);
void (*remove)(struct mdesc_handle *handle, u64 node);
void (*add)(struct mdesc_handle *handle, u64 node,
const char *node_name);
void (*remove)(struct mdesc_handle *handle, u64 node,
const char *node_name);
const char *node_name;
struct mdesc_notifier_client *next;
};

2
arch/sparc/include/asm/vio.h
View File

@ -316,12 +316,14 @@ static inline u32 vio_dring_prev(struct vio_dring_state *dr, u32 index)
}
#define VIO_MAX_TYPE_LEN 32
#define VIO_MAX_NAME_LEN 32
#define VIO_MAX_COMPAT_LEN 64
struct vio_dev {
u64 mp;
struct device_node *dp;
char node_name[VIO_MAX_NAME_LEN];
char type[VIO_MAX_TYPE_LEN];
char compat[VIO_MAX_COMPAT_LEN];
int compat_len;

80
arch/sparc/kernel/mdesc.c
View File

@ -291,7 +291,7 @@ void mdesc_register_notifier(struct mdesc_notifier_client *client)
client_list = client;
mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
client->add(cur_mdesc, node);
client->add(cur_mdesc, node, client->node_name);
mutex_unlock(&mdesc_mutex);
}
@ -399,55 +399,61 @@ static bool ds_port_node_match(union md_node_info *a_node_info,
static void invoke_on_missing(const char *name,
struct mdesc_handle *a,
struct mdesc_handle *b,
void (*func)(struct mdesc_handle *, u64))
void (*func)(struct mdesc_handle *, u64,
const char *node_name))
{
u64 node;
mdesc_node_info_get_f get_info_func;
mdesc_node_info_rel_f rel_info_func;
mdesc_node_match_f node_match_func;
union md_node_info a_node_info;
union md_node_info b_node_info;
bool found;
u64 a_node;
u64 b_node;
int rv;
mdesc_for_each_node_by_name(a, node, name) {
int found = 0, is_vdc_port = 0;
const char *name_prop;
const u64 *id;
u64 fnode;
/*
* Find the get_info, rel_info and node_match ops for the given
* node name
*/
mdesc_get_node_ops(name, &get_info_func, &rel_info_func,
&node_match_func);
name_prop = mdesc_get_property(a, node, "name", NULL);
if (name_prop && !strcmp(name_prop, "vdc-port")) {
is_vdc_port = 1;
id = parent_cfg_handle(a, node);
} else
id = mdesc_get_property(a, node, "id", NULL);
/* If we didn't find a match, the node type is not supported */
if (!get_info_func || !rel_info_func || !node_match_func) {
pr_err("MD: %s node type is not supported\n", name);
return;
}
if (!id) {
printk(KERN_ERR "MD: Cannot find ID for %s node.\n",
(name_prop ? name_prop : name));
mdesc_for_each_node_by_name(a, a_node, name) {
found = false;
rv = get_info_func(a, a_node, &a_node_info);
if (rv != 0) {
pr_err("MD: Cannot find 1 or more required match properties for %s node.\n",
name);
continue;
}
mdesc_for_each_node_by_name(b, fnode, name) {
const u64 *fid;
if (is_vdc_port) {
name_prop = mdesc_get_property(b, fnode,
"name", NULL);
if (!name_prop ||
strcmp(name_prop, "vdc-port"))
/* Check each node in B for node matching a_node */
mdesc_for_each_node_by_name(b, b_node, name) {
rv = get_info_func(b, b_node, &b_node_info);
if (rv != 0)
continue;
fid = parent_cfg_handle(b, fnode);
if (!fid) {
printk(KERN_ERR "MD: Cannot find ID "
"for vdc-port node.\n");
continue;
}
} else
fid = mdesc_get_property(b, fnode,
"id", NULL);
if (*id == *fid) {
found = 1;
if (node_match_func(&a_node_info, &b_node_info)) {
found = true;
rel_info_func(&b_node_info);
break;
}
rel_info_func(&b_node_info);
}
rel_info_func(&a_node_info);
if (!found)
func(a, node);
func(a, a_node, name);
}
}

22
arch/sparc/kernel/vio.c
View File

@ -219,6 +219,7 @@ int vio_set_intr(unsigned long dev_ino, int state)
EXPORT_SYMBOL(vio_set_intr);
static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
const char *node_name,
struct device *parent)
{
const char *type, *compat, *bus_id_name;
@ -236,7 +237,7 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
tlen = strlen(type) + 1;
}
}
if (tlen > VIO_MAX_TYPE_LEN) {
if (tlen > VIO_MAX_TYPE_LEN || strlen(type) >= VIO_MAX_TYPE_LEN) {
printk(KERN_ERR "VIO: Type string [%s] is too long.\n",
type);
return NULL;
@ -335,6 +336,11 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
printk(KERN_INFO "VIO: Adding device %s\n", dev_name(&vdev->dev));
/* node_name is NULL for the parent/channel-devices node */
if (node_name != NULL)
(void) snprintf(vdev->node_name, VIO_MAX_NAME_LEN, "%s",
node_name);
err = device_register(&vdev->dev);
if (err) {
printk(KERN_ERR "VIO: Could not register device %s, err=%d\n",
@ -349,9 +355,10 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
return vdev;
}
static void vio_add(struct mdesc_handle *hp, u64 node)
static void vio_add(struct mdesc_handle *hp, u64 node,
const char *node_name)
{
(void) vio_create_one(hp, node, &root_vdev->dev);
(void) vio_create_one(hp, node, node_name, &root_vdev->dev);
}
struct vio_md_node_query {
@ -375,7 +382,7 @@ static int vio_md_node_match(struct device *dev, void *arg)
return 1;
}
static void vio_remove(struct mdesc_handle *hp, u64 node)
static void vio_remove(struct mdesc_handle *hp, u64 node, const char *node_name)
{
const char *type;
const u64 *id, *cfg_handle;
@ -446,7 +453,8 @@ static struct mdesc_notifier_client vio_device_notifier = {
* under "openboot" that we should not mess with as aparently that is
* reserved exclusively for OBP use.
*/
static void vio_add_ds(struct mdesc_handle *hp, u64 node)
static void vio_add_ds(struct mdesc_handle *hp, u64 node,
const char *node_name)
{
int found;
u64 a;
@ -463,7 +471,7 @@ static void vio_add_ds(struct mdesc_handle *hp, u64 node)
}
if (found)
(void) vio_create_one(hp, node, &root_vdev->dev);
(void) vio_create_one(hp, node, node_name, &root_vdev->dev);
}
static struct mdesc_notifier_client vio_ds_notifier = {
@ -530,7 +538,7 @@ static int __init vio_init(void)
cdev_cfg_handle = *cfg_handle;
root_vdev = vio_create_one(hp, root, NULL);
root_vdev = vio_create_one(hp, root, NULL, NULL);
err = -ENODEV;
if (!root_vdev) {
printk(KERN_ERR "VIO: Could not create root device.\n");