[PATCH v2 09/26] staging: most: core: let core manage aim attributes
Christian Gromm
christian.gromm at microchip.com
Fri Oct 13 14:32:53 UTC 2017
This patch creates a new attribute group to manage the attributes
of a registered aim module in sysfs and changes the show and store
functions accordingly.
Signed-off-by: Christian Gromm <christian.gromm at microchip.com>
---
v2: fix patch numeration
drivers/staging/most/core.c | 109 +++++++++++++++++++++++++++++---------------
1 file changed, 73 insertions(+), 36 deletions(-)
diff --git a/drivers/staging/most/core.c b/drivers/staging/most/core.c
index 01a1a37..45afec9 100644
--- a/drivers/staging/most/core.c
+++ b/drivers/staging/most/core.c
@@ -553,28 +553,57 @@ static ssize_t interface_show(struct device *dev,
/* ___ ___
* ___A I M___
*/
-static ssize_t links_show(struct device *dev, struct device_attribute *attr,
- char *buf)
+static struct most_aim *match_module(char *name)
+{
+ struct most_aim *aim;
+
+ list_for_each_entry(aim, &mc.mod_list, list) {
+ if (!strcmp(aim->name, name))
+ return aim;
+ }
+ return NULL;
+}
+
+static ssize_t links_show(struct device_driver *drv, char *buf)
{
struct most_channel *c;
struct most_inst_obj *i;
- struct most_aim *aim = to_most_aim(dev);
int offs = 0;
list_for_each_entry(i, &instance_list, list) {
list_for_each_entry(c, &i->channel_list, list) {
- if (c->pipe0.aim == aim || c->pipe1.aim == aim) {
- offs += snprintf(buf + offs, PAGE_SIZE - offs,
- "%s:%s\n",
+ if (c->pipe0.aim) {
+ offs += snprintf(buf + offs,
+ PAGE_SIZE - offs,
+ "%s:%s:%s\n",
+ c->pipe0.aim->name,
+ dev_name(&i->iface->dev),
+ dev_name(&c->dev));
+ }
+ if (c->pipe1.aim) {
+ offs += snprintf(buf + offs,
+ PAGE_SIZE - offs,
+ "%s:%s:%s\n",
+ c->pipe1.aim->name,
dev_name(&i->iface->dev),
dev_name(&c->dev));
}
}
}
-
return offs;
}
+static ssize_t modules_show(struct device_driver *drv, char *buf)
+{
+ struct most_aim *aim;
+ int offs = 0;
+
+ list_for_each_entry(aim, &mc.mod_list, list) {
+ offs += snprintf(buf + offs, PAGE_SIZE - offs, "%s\n",
+ aim->name);
+ }
+ return offs;
+}
/**
* split_string - parses and changes string in the buffer buf and
* splits it into two mandatory and one optional substrings.
@@ -597,7 +626,7 @@ static ssize_t links_show(struct device *dev, struct device_attribute *attr,
* Input: "mdev1:ep81"
* Output: *a -> "mdev1", *b -> "ep81", *c == NULL
*/
-static int split_string(char *buf, char **a, char **b, char **c)
+static int split_string(char *buf, char **a, char **b, char **c, char **d)
{
*a = strsep(&buf, ":");
if (!*a)
@@ -607,8 +636,12 @@ static int split_string(char *buf, char **a, char **b, char **c)
if (!*b)
return -EIO;
- if (c)
- *c = strsep(&buf, ":\n");
+ *c = strsep(&buf, ":\n");
+ if (!*c)
+ return -EIO;
+
+ if (d)
+ *d = strsep(&buf, ":\n");
return 0;
}
@@ -692,38 +725,38 @@ static int link_channel_to_aim(struct most_channel *c, struct most_aim *aim,
* (1) would create the device node /dev/my_rxchannel
* (2) would create the device node /dev/mdev1-ep81
*/
-static ssize_t add_link_store(struct device *dev,
- struct device_attribute *attr,
+static ssize_t add_link_store(struct device_driver *drv,
const char *buf,
size_t len)
{
struct most_channel *c;
- struct most_aim *aim = to_most_aim(dev);
+ struct most_aim *aim;
char buffer[STRING_SIZE];
char *mdev;
char *mdev_ch;
- char *mdev_devnod;
+ char *aim_name;
+ char *aim_param;
char devnod_buf[STRING_SIZE];
int ret;
size_t max_len = min_t(size_t, len + 1, STRING_SIZE);
strlcpy(buffer, buf, max_len);
- ret = split_string(buffer, &mdev, &mdev_ch, &mdev_devnod);
+ ret = split_string(buffer, &mdev, &mdev_ch, &aim_name, &aim_param);
if (ret)
return ret;
-
- if (!mdev_devnod || *mdev_devnod == 0) {
+ aim = match_module(aim_name);
+ if (!aim_param || *aim_param == 0) {
snprintf(devnod_buf, sizeof(devnod_buf), "%s-%s", mdev,
mdev_ch);
- mdev_devnod = devnod_buf;
+ aim_param = devnod_buf;
}
c = get_channel_by_name(mdev, mdev_ch);
if (IS_ERR(c))
return -ENODEV;
- ret = link_channel_to_aim(c, aim, mdev_devnod);
+ ret = link_channel_to_aim(c, aim, aim_param);
if (ret)
return ret;
@@ -740,24 +773,24 @@ static ssize_t add_link_store(struct device *dev,
* Example:
* echo "mdev0:ep81" >remove_link
*/
-static ssize_t remove_link_store(struct device *dev,
- struct device_attribute *attr,
+static ssize_t remove_link_store(struct device_driver *drv,
const char *buf,
size_t len)
{
struct most_channel *c;
- struct most_aim *aim = to_most_aim(dev);
+ struct most_aim *aim;
char buffer[STRING_SIZE];
char *mdev;
char *mdev_ch;
+ char *aim_name;
int ret;
size_t max_len = min_t(size_t, len + 1, STRING_SIZE);
strlcpy(buffer, buf, max_len);
- ret = split_string(buffer, &mdev, &mdev_ch, NULL);
+ ret = split_string(buffer, &mdev, &mdev_ch, &aim_name, NULL);
if (ret)
return ret;
-
+ aim = match_module(aim_name);
c = get_channel_by_name(mdev, mdev_ch);
if (IS_ERR(c))
return -ENODEV;
@@ -771,23 +804,27 @@ static ssize_t remove_link_store(struct device *dev,
return len;
}
-static DEVICE_ATTR_RO(links);
-static DEVICE_ATTR_WO(add_link);
-static DEVICE_ATTR_WO(remove_link);
+#define DRV_ATTR(_name) &driver_attr_##_name.attr
+
+static DRIVER_ATTR_RO(links);
+static DRIVER_ATTR_RO(modules);
+static DRIVER_ATTR_WO(add_link);
+static DRIVER_ATTR_WO(remove_link);
-static struct attribute *aim_attrs[] = {
- DEV_ATTR(links),
- DEV_ATTR(add_link),
- DEV_ATTR(remove_link),
+static struct attribute *module_attrs[] = {
+ DRV_ATTR(links),
+ DRV_ATTR(modules),
+ DRV_ATTR(add_link),
+ DRV_ATTR(remove_link),
NULL,
};
-static struct attribute_group aim_attr_group = {
- .attrs = aim_attrs,
+static struct attribute_group module_attr_group = {
+ .attrs = module_attrs,
};
-static const struct attribute_group *aim_attr_groups[] = {
- &aim_attr_group,
+static const struct attribute_group *module_attr_groups[] = {
+ &module_attr_group,
NULL,
};
/* ___ ___
@@ -1296,7 +1333,6 @@ int most_register_aim(struct most_aim *aim)
aim->dev.init_name = aim->name;
aim->dev.bus = &mc.bus;
aim->dev.parent = &mc.dev;
- aim->dev.groups = aim_attr_groups;
aim->dev.release = release_aim;
ret = device_register(&aim->dev);
if (ret) {
@@ -1563,6 +1599,7 @@ static int __init most_init(void)
mc.bus.match = most_match,
mc.drv.name = "most_core",
mc.drv.bus = &mc.bus,
+ mc.drv.groups = module_attr_groups;
err = bus_register(&mc.bus);
if (err) {
--
1.9.1
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