#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/configfs.h>
#include <linux/most.h>
#define MAX_STRING_SIZE 80
struct mdev_link {
struct config_item item;
struct list_head list;
bool create_link;
bool destroy_link;
u16 num_buffers;
u16 buffer_size;
u16 subbuffer_size;
u16 packets_per_xact;
u16 dbr_size;
char datatype[MAX_STRING_SIZE];
char direction[MAX_STRING_SIZE];
char name[MAX_STRING_SIZE];
char device[MAX_STRING_SIZE];
char channel[MAX_STRING_SIZE];
char comp[MAX_STRING_SIZE];
char comp_params[MAX_STRING_SIZE];
};
static struct list_head mdev_link_list;
static int set_cfg_buffer_size(struct mdev_link *link)
{
return most_set_cfg_buffer_size(link->device, link->channel,
link->buffer_size);
}
static int set_cfg_subbuffer_size(struct mdev_link *link)
{
return most_set_cfg_subbuffer_size(link->device, link->channel,
link->subbuffer_size);
}
static int set_cfg_dbr_size(struct mdev_link *link)
{
return most_set_cfg_dbr_size(link->device, link->channel,
link->dbr_size);
}
static int set_cfg_num_buffers(struct mdev_link *link)
{
return most_set_cfg_num_buffers(link->device, link->channel,
link->num_buffers);
}
static int set_cfg_packets_xact(struct mdev_link *link)
{
return most_set_cfg_packets_xact(link->device, link->channel,
link->packets_per_xact);
}
static int set_cfg_direction(struct mdev_link *link)
{
return most_set_cfg_direction(link->device, link->channel,
link->direction);
}
static int set_cfg_datatype(struct mdev_link *link)
{
return most_set_cfg_datatype(link->device, link->channel,
link->datatype);
}
static int (*set_config_val[])(struct mdev_link *link) = {
set_cfg_buffer_size,
set_cfg_subbuffer_size,
set_cfg_dbr_size,
set_cfg_num_buffers,
set_cfg_packets_xact,
set_cfg_direction,
set_cfg_datatype,
};
static struct mdev_link *to_mdev_link(struct config_item *item)
{
return container_of(item, struct mdev_link, item);
}
static int set_config_and_add_link(struct mdev_link *mdev_link)
{
int i;
int ret;
for (i = 0; i < ARRAY_SIZE(set_config_val); i++) {
ret = set_config_val[i](mdev_link);
if (ret < 0 && ret != -ENODEV) {
pr_err("Config failed\n");
return ret;
}
}
return most_add_link(mdev_link->device, mdev_link->channel,
mdev_link->comp, mdev_link->name,
mdev_link->comp_params);
}
static ssize_t mdev_link_create_link_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
bool tmp;
int ret;
ret = kstrtobool(page, &tmp);
if (ret)
return ret;
if (!tmp)
return count;
ret = set_config_and_add_link(mdev_link);
if (ret && ret != -ENODEV)
return ret;
list_add_tail(&mdev_link->list, &mdev_link_list);
mdev_link->create_link = tmp;
mdev_link->destroy_link = false;
return count;
}
static ssize_t mdev_link_destroy_link_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
bool tmp;
int ret;
ret = kstrtobool(page, &tmp);
if (ret)
return ret;
if (!tmp)
return count;
ret = most_remove_link(mdev_link->device, mdev_link->channel,
mdev_link->comp);
if (ret)
return ret;
if (!list_empty(&mdev_link_list))
list_del(&mdev_link->list);
mdev_link->destroy_link = tmp;
return count;
}
static ssize_t mdev_link_direction_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->direction);
}
static ssize_t mdev_link_direction_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
if (!sysfs_streq(page, "dir_rx") && !sysfs_streq(page, "rx") &&
!sysfs_streq(page, "dir_tx") && !sysfs_streq(page, "tx"))
return -EINVAL;
strcpy(mdev_link->direction, page);
strim(mdev_link->direction);
return count;
}
static ssize_t mdev_link_datatype_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->datatype);
}
static ssize_t mdev_link_datatype_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
if (!sysfs_streq(page, "control") && !sysfs_streq(page, "async") &&
!sysfs_streq(page, "sync") && !sysfs_streq(page, "isoc") &&
!sysfs_streq(page, "isoc_avp"))
return -EINVAL;
strcpy(mdev_link->datatype, page);
strim(mdev_link->datatype);
return count;
}
static ssize_t mdev_link_device_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->device);
}
static ssize_t mdev_link_device_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
strscpy(mdev_link->device, page, sizeof(mdev_link->device));
strim(mdev_link->device);
return count;
}
static ssize_t mdev_link_channel_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->channel);
}
static ssize_t mdev_link_channel_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
strscpy(mdev_link->channel, page, sizeof(mdev_link->channel));
strim(mdev_link->channel);
return count;
}
static ssize_t mdev_link_comp_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n", to_mdev_link(item)->comp);
}
static ssize_t mdev_link_comp_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
strscpy(mdev_link->comp, page, sizeof(mdev_link->comp));
strim(mdev_link->comp);
return count;
}
static ssize_t mdev_link_comp_params_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%s\n",
to_mdev_link(item)->comp_params);
}
static ssize_t mdev_link_comp_params_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
strscpy(mdev_link->comp_params, page, sizeof(mdev_link->comp_params));
strim(mdev_link->comp_params);
return count;
}
static ssize_t mdev_link_num_buffers_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n",
to_mdev_link(item)->num_buffers);
}
static ssize_t mdev_link_num_buffers_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
ret = kstrtou16(page, 0, &mdev_link->num_buffers);
if (ret)
return ret;
return count;
}
static ssize_t mdev_link_buffer_size_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n",
to_mdev_link(item)->buffer_size);
}
static ssize_t mdev_link_buffer_size_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
ret = kstrtou16(page, 0, &mdev_link->buffer_size);
if (ret)
return ret;
return count;
}
static ssize_t mdev_link_subbuffer_size_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n",
to_mdev_link(item)->subbuffer_size);
}
static ssize_t mdev_link_subbuffer_size_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
ret = kstrtou16(page, 0, &mdev_link->subbuffer_size);
if (ret)
return ret;
return count;
}
static ssize_t mdev_link_packets_per_xact_show(struct config_item *item,
char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n",
to_mdev_link(item)->packets_per_xact);
}
static ssize_t mdev_link_packets_per_xact_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
ret = kstrtou16(page, 0, &mdev_link->packets_per_xact);
if (ret)
return ret;
return count;
}
static ssize_t mdev_link_dbr_size_show(struct config_item *item, char *page)
{
return snprintf(page, PAGE_SIZE, "%d\n", to_mdev_link(item)->dbr_size);
}
static ssize_t mdev_link_dbr_size_store(struct config_item *item,
const char *page, size_t count)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
ret = kstrtou16(page, 0, &mdev_link->dbr_size);
if (ret)
return ret;
return count;
}
CONFIGFS_ATTR_WO(mdev_link_, create_link);
CONFIGFS_ATTR_WO(mdev_link_, destroy_link);
CONFIGFS_ATTR(mdev_link_, device);
CONFIGFS_ATTR(mdev_link_, channel);
CONFIGFS_ATTR(mdev_link_, comp);
CONFIGFS_ATTR(mdev_link_, comp_params);
CONFIGFS_ATTR(mdev_link_, num_buffers);
CONFIGFS_ATTR(mdev_link_, buffer_size);
CONFIGFS_ATTR(mdev_link_, subbuffer_size);
CONFIGFS_ATTR(mdev_link_, packets_per_xact);
CONFIGFS_ATTR(mdev_link_, datatype);
CONFIGFS_ATTR(mdev_link_, direction);
CONFIGFS_ATTR(mdev_link_, dbr_size);
static struct configfs_attribute *mdev_link_attrs[] = {
&mdev_link_attr_create_link,
&mdev_link_attr_destroy_link,
&mdev_link_attr_device,
&mdev_link_attr_channel,
&mdev_link_attr_comp,
&mdev_link_attr_comp_params,
&mdev_link_attr_num_buffers,
&mdev_link_attr_buffer_size,
&mdev_link_attr_subbuffer_size,
&mdev_link_attr_packets_per_xact,
&mdev_link_attr_datatype,
&mdev_link_attr_direction,
&mdev_link_attr_dbr_size,
NULL,
};
static void mdev_link_release(struct config_item *item)
{
struct mdev_link *mdev_link = to_mdev_link(item);
int ret;
if (mdev_link->destroy_link)
goto free_item;
ret = most_remove_link(mdev_link->device, mdev_link->channel,
mdev_link->comp);
if (ret) {
pr_err("Removing link failed.\n");
goto free_item;
}
if (!list_empty(&mdev_link_list))
list_del(&mdev_link->list);
free_item:
kfree(to_mdev_link(item));
}
static struct configfs_item_operations mdev_link_item_ops = {
.release = mdev_link_release,
};
static const struct config_item_type mdev_link_type = {
.ct_item_ops = &mdev_link_item_ops,
.ct_attrs = mdev_link_attrs,
.ct_owner = THIS_MODULE,
};
struct most_common {
struct config_group group;
struct module *mod;
struct configfs_subsystem subsys;
};
static struct most_common *to_most_common(struct configfs_subsystem *subsys)
{
return container_of(subsys, struct most_common, subsys);
}
static struct config_item *most_common_make_item(struct config_group *group,
const char *name)
{
struct mdev_link *mdev_link;
struct most_common *mc = to_most_common(group->cg_subsys);
mdev_link = kzalloc_obj(*mdev_link);
if (!mdev_link)
return ERR_PTR(-ENOMEM);
if (!try_module_get(mc->mod)) {
kfree(mdev_link);
return ERR_PTR(-ENOLCK);
}
config_item_init_type_name(&mdev_link->item, name,
&mdev_link_type);
if (!strcmp(group->cg_item.ci_namebuf, "most_cdev"))
strcpy(mdev_link->comp, "cdev");
else if (!strcmp(group->cg_item.ci_namebuf, "most_net"))
strcpy(mdev_link->comp, "net");
else if (!strcmp(group->cg_item.ci_namebuf, "most_video"))
strcpy(mdev_link->comp, "video");
strcpy(mdev_link->name, name);
return &mdev_link->item;
}
static void most_common_release(struct config_item *item)
{
struct config_group *group = to_config_group(item);
kfree(to_most_common(group->cg_subsys));
}
static struct configfs_item_operations most_common_item_ops = {
.release = most_common_release,
};
static void most_common_disconnect(struct config_group *group,
struct config_item *item)
{
struct most_common *mc = to_most_common(group->cg_subsys);
module_put(mc->mod);
}
static struct configfs_group_operations most_common_group_ops = {
.make_item = most_common_make_item,
.disconnect_notify = most_common_disconnect,
};
static const struct config_item_type most_common_type = {
.ct_item_ops = &most_common_item_ops,
.ct_group_ops = &most_common_group_ops,
.ct_owner = THIS_MODULE,
};
static struct most_common most_cdev = {
.subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "most_cdev",
.ci_type = &most_common_type,
},
},
},
};
static struct most_common most_net = {
.subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "most_net",
.ci_type = &most_common_type,
},
},
},
};
static struct most_common most_video = {
.subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "most_video",
.ci_type = &most_common_type,
},
},
},
};
struct most_snd_grp {
struct config_group group;
bool create_card;
struct list_head list;
};
static struct most_snd_grp *to_most_snd_grp(struct config_item *item)
{
return container_of(to_config_group(item), struct most_snd_grp, group);
}
static struct config_item *most_snd_grp_make_item(struct config_group *group,
const char *name)
{
struct mdev_link *mdev_link;
mdev_link = kzalloc_obj(*mdev_link);
if (!mdev_link)
return ERR_PTR(-ENOMEM);
config_item_init_type_name(&mdev_link->item, name, &mdev_link_type);
mdev_link->create_link = false;
strcpy(mdev_link->name, name);
strcpy(mdev_link->comp, "sound");
return &mdev_link->item;
}
static ssize_t most_snd_grp_create_card_store(struct config_item *item,
const char *page, size_t count)
{
struct most_snd_grp *snd_grp = to_most_snd_grp(item);
int ret;
bool tmp;
ret = kstrtobool(page, &tmp);
if (ret)
return ret;
if (tmp) {
ret = most_cfg_complete("sound");
if (ret)
return ret;
}
snd_grp->create_card = tmp;
return count;
}
CONFIGFS_ATTR_WO(most_snd_grp_, create_card);
static struct configfs_attribute *most_snd_grp_attrs[] = {
&most_snd_grp_attr_create_card,
NULL,
};
static void most_snd_grp_release(struct config_item *item)
{
struct most_snd_grp *group = to_most_snd_grp(item);
list_del(&group->list);
kfree(group);
}
static struct configfs_item_operations most_snd_grp_item_ops = {
.release = most_snd_grp_release,
};
static struct configfs_group_operations most_snd_grp_group_ops = {
.make_item = most_snd_grp_make_item,
};
static const struct config_item_type most_snd_grp_type = {
.ct_item_ops = &most_snd_grp_item_ops,
.ct_group_ops = &most_snd_grp_group_ops,
.ct_attrs = most_snd_grp_attrs,
.ct_owner = THIS_MODULE,
};
struct most_sound {
struct configfs_subsystem subsys;
struct list_head soundcard_list;
struct module *mod;
};
static struct config_group *most_sound_make_group(struct config_group *group,
const char *name)
{
struct most_snd_grp *most;
struct most_sound *ms = container_of(group->cg_subsys,
struct most_sound, subsys);
list_for_each_entry(most, &ms->soundcard_list, list) {
if (!most->create_card) {
pr_info("adapter configuration still in progress.\n");
return ERR_PTR(-EPROTO);
}
}
if (!try_module_get(ms->mod))
return ERR_PTR(-ENOLCK);
most = kzalloc_obj(*most);
if (!most) {
module_put(ms->mod);
return ERR_PTR(-ENOMEM);
}
config_group_init_type_name(&most->group, name, &most_snd_grp_type);
list_add_tail(&most->list, &ms->soundcard_list);
return &most->group;
}
static void most_sound_disconnect(struct config_group *group,
struct config_item *item)
{
struct most_sound *ms = container_of(group->cg_subsys,
struct most_sound, subsys);
module_put(ms->mod);
}
static struct configfs_group_operations most_sound_group_ops = {
.make_group = most_sound_make_group,
.disconnect_notify = most_sound_disconnect,
};
static const struct config_item_type most_sound_type = {
.ct_group_ops = &most_sound_group_ops,
.ct_owner = THIS_MODULE,
};
static struct most_sound most_sound_subsys = {
.subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "most_sound",
.ci_type = &most_sound_type,
},
},
},
};
int most_register_configfs_subsys(struct most_component *c)
{
int ret;
if (!strcmp(c->name, "cdev")) {
most_cdev.mod = c->mod;
ret = configfs_register_subsystem(&most_cdev.subsys);
} else if (!strcmp(c->name, "net")) {
most_net.mod = c->mod;
ret = configfs_register_subsystem(&most_net.subsys);
} else if (!strcmp(c->name, "video")) {
most_video.mod = c->mod;
ret = configfs_register_subsystem(&most_video.subsys);
} else if (!strcmp(c->name, "sound")) {
most_sound_subsys.mod = c->mod;
ret = configfs_register_subsystem(&most_sound_subsys.subsys);
} else {
return -ENODEV;
}
if (ret) {
pr_err("Error %d while registering subsystem %s\n",
ret, c->name);
}
return ret;
}
EXPORT_SYMBOL_GPL(most_register_configfs_subsys);
void most_interface_register_notify(const char *mdev)
{
bool register_snd_card = false;
struct mdev_link *mdev_link;
list_for_each_entry(mdev_link, &mdev_link_list, list) {
if (!strcmp(mdev_link->device, mdev)) {
set_config_and_add_link(mdev_link);
if (!strcmp(mdev_link->comp, "sound"))
register_snd_card = true;
}
}
if (register_snd_card)
most_cfg_complete("sound");
}
void most_deregister_configfs_subsys(struct most_component *c)
{
if (!strcmp(c->name, "cdev"))
configfs_unregister_subsystem(&most_cdev.subsys);
else if (!strcmp(c->name, "net"))
configfs_unregister_subsystem(&most_net.subsys);
else if (!strcmp(c->name, "video"))
configfs_unregister_subsystem(&most_video.subsys);
else if (!strcmp(c->name, "sound"))
configfs_unregister_subsystem(&most_sound_subsys.subsys);
}
EXPORT_SYMBOL_GPL(most_deregister_configfs_subsys);
int __init configfs_init(void)
{
config_group_init(&most_cdev.subsys.su_group);
mutex_init(&most_cdev.subsys.su_mutex);
config_group_init(&most_net.subsys.su_group);
mutex_init(&most_net.subsys.su_mutex);
config_group_init(&most_video.subsys.su_group);
mutex_init(&most_video.subsys.su_mutex);
config_group_init(&most_sound_subsys.subsys.su_group);
mutex_init(&most_sound_subsys.subsys.su_mutex);
INIT_LIST_HEAD(&most_sound_subsys.soundcard_list);
INIT_LIST_HEAD(&mdev_link_list);
return 0;
}
