#include "visorbus_private.h"
#include "timskmod.h"
-#include "channel_attr.h"
#include "devmajorminor_attr.h"
#include "periodic_work.h"
#include "vbuschannel.h"
kfree(dev);
}
+/* Implement publishing of channel attributes under:
+ *
+ * /sys/bus/visorbus<x>/dev<y>/channel
+ *
+ */
+
+#define to_channel_attr(_attr) \
+ container_of(_attr, struct channel_attribute, attr)
+#define to_visor_device_from_kobjchannel(obj) \
+ container_of(obj, struct visor_device, kobjchannel)
+
+struct channel_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct visor_device*, char *buf);
+ ssize_t (*store)(struct visor_device*, const char *buf, size_t count);
+};
+
+/* begin implementation of specific channel attributes to appear under
+* /sys/bus/visorbus<x>/dev<y>/channel
+*/
+static ssize_t devicechannel_attr_physaddr(struct visor_device *dev, char *buf)
+{
+ if (!dev->visorchannel)
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "0x%Lx\n",
+ visorchannel_get_physaddr(dev->visorchannel));
+}
+
+static ssize_t devicechannel_attr_nbytes(struct visor_device *dev, char *buf)
+{
+ if (!dev->visorchannel)
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "0x%lx\n",
+ visorchannel_get_nbytes(dev->visorchannel));
+}
+
+static ssize_t devicechannel_attr_clientpartition(struct visor_device *dev,
+ char *buf) {
+ if (!dev->visorchannel)
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "0x%Lx\n",
+ visorchannel_get_clientpartition(dev->visorchannel));
+}
+
+static ssize_t devicechannel_attr_typeguid(struct visor_device *dev, char *buf)
+{
+ char s[99];
+
+ if (!dev->visorchannel)
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ visorchannel_id(dev->visorchannel, s));
+}
+
+static ssize_t devicechannel_attr_zoneguid(struct visor_device *dev, char *buf)
+{
+ char s[99];
+
+ if (!dev->visorchannel)
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ visorchannel_zoneid(dev->visorchannel, s));
+}
+
+static ssize_t devicechannel_attr_typename(struct visor_device *dev, char *buf)
+{
+ int i = 0;
+ struct bus_type *xbus = dev->device.bus;
+ struct device_driver *xdrv = dev->device.driver;
+ struct visor_driver *drv = NULL;
+
+ if (!dev->visorchannel || !xbus || !xdrv)
+ return 0;
+ i = xbus->match(&dev->device, xdrv);
+ if (!i)
+ return 0;
+ drv = to_visor_driver(xdrv);
+ return snprintf(buf, PAGE_SIZE, "%s\n", drv->channel_types[i - 1].name);
+}
+
+static ssize_t devicechannel_attr_dump(struct visor_device *dev, char *buf)
+{
+ int count = 0;
+/* TODO: replace this with debugfs code
+ struct seq_file *m = NULL;
+ if (dev->visorchannel == NULL)
+ return 0;
+ m = visor_seq_file_new_buffer(buf, PAGE_SIZE - 1);
+ if (m == NULL)
+ return 0;
+ visorchannel_debug(dev->visorchannel, 1, m, 0);
+ count = m->count;
+ visor_seq_file_done_buffer(m);
+ m = NULL;
+*/
+ return count;
+}
+
+static struct channel_attribute all_channel_attrs[] = {
+ __ATTR(physaddr, S_IRUGO,
+ devicechannel_attr_physaddr, NULL),
+ __ATTR(nbytes, S_IRUGO,
+ devicechannel_attr_nbytes, NULL),
+ __ATTR(clientpartition, S_IRUGO,
+ devicechannel_attr_clientpartition, NULL),
+ __ATTR(typeguid, S_IRUGO,
+ devicechannel_attr_typeguid, NULL),
+ __ATTR(zoneguid, S_IRUGO,
+ devicechannel_attr_zoneguid, NULL),
+ __ATTR(typename, S_IRUGO,
+ devicechannel_attr_typename, NULL),
+ __ATTR(dump, S_IRUGO,
+ devicechannel_attr_dump, NULL),
+};
+
+/* end implementation of specific channel attributes */
+
+static ssize_t channel_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct channel_attribute *channel_attr = to_channel_attr(attr);
+ struct visor_device *dev = to_visor_device_from_kobjchannel(kobj);
+ ssize_t ret = 0;
+
+ if (channel_attr->show)
+ ret = channel_attr->show(dev, buf);
+ return ret;
+}
+
+static ssize_t channel_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
+{
+ struct channel_attribute *channel_attr = to_channel_attr(attr);
+ struct visor_device *dev = to_visor_device_from_kobjchannel(kobj);
+ ssize_t ret = 0;
+
+ if (channel_attr->store)
+ ret = channel_attr->store(dev, buf, count);
+ return ret;
+}
+
+static int channel_create_file(struct visor_device *dev,
+ struct channel_attribute *attr)
+{
+ return sysfs_create_file(&dev->kobjchannel, &attr->attr);
+}
+
+static void channel_remove_file(struct visor_device *dev,
+ struct channel_attribute *attr)
+{
+ sysfs_remove_file(&dev->kobjchannel, &attr->attr);
+}
+
+static const struct sysfs_ops channel_sysfs_ops = {
+ .show = channel_attr_show,
+ .store = channel_attr_store,
+};
+
+static struct kobj_type channel_kobj_type = {
+ .sysfs_ops = &channel_sysfs_ops
+};
+
+int register_channel_attributes(struct visor_device *dev)
+{
+ int rc = 0, i = 0, x = 0;
+
+ if (dev->kobjchannel.parent)
+ goto away; /* already registered */
+ x = kobject_init_and_add(&dev->kobjchannel, &channel_kobj_type,
+ &dev->device.kobj, "channel");
+ if (x < 0) {
+ rc = x;
+ goto away;
+ }
+
+ kobject_uevent(&dev->kobjchannel, KOBJ_ADD);
+
+ for (i = 0;
+ i < sizeof(all_channel_attrs) / sizeof(struct channel_attribute);
+ i++)
+ x = channel_create_file(dev, &all_channel_attrs[i]);
+ if (x < 0) {
+ while (--i >= 0)
+ channel_remove_file(dev, &all_channel_attrs[i]);
+ kobject_del(&dev->kobjchannel);
+ kobject_put(&dev->kobjchannel);
+ rc = x;
+ goto away;
+ }
+away:
+ return rc;
+}
+
+void unregister_channel_attributes(struct visor_device *dev)
+{
+ int i = 0;
+
+ if (!dev->kobjchannel.parent)
+ return; /* already unregistered */
+ for (i = 0;
+ i < sizeof(all_channel_attrs) / sizeof(struct channel_attribute);
+ i++)
+ channel_remove_file(dev, &all_channel_attrs[i]);
+
+ kobject_del(&dev->kobjchannel);
+ kobject_put(&dev->kobjchannel);
+ dev->kobjchannel.parent = NULL;
+}
/* This is actually something they forgot to put in the kernel.
* struct bus_type in the kernel SHOULD have a "busses" member, which
* should be treated similarly to the "devices" and "drivers" members.
projects / deliverable / linux.git / blobdiff