documentation update, readme reformatted

[lunaix-os.git] / lunaix-os / kernel / device / device.c

diff --git a/lunaix-os/kernel/device/device.c b/lunaix-os/kernel/device/device.c
index 87657551eb50a0e5a3ac42a257d712ad8e011344..9af8ac34fdd75b7b1a5545eacc4ed81967561493 100644 (file)
--- a/lunaix-os/kernel/device/device.c
+++ b/lunaix-os/kernel/device/device.c
@@ -1,4 +1,3 @@
-

 #include <lunaix/device.h>
 #include <lunaix/fs.h>
 #include <lunaix/fs/twifs.h>
 #include <lunaix/device.h>
 #include <lunaix/fs.h>
 #include <lunaix/fs/twifs.h>


@@ -7,73 +6,67 @@
 #include <lunaix/spike.h>
 #include <lunaix/syscall.h>
 #include <lunaix/syscall_utils.h>
 #include <lunaix/spike.h>
 #include <lunaix/syscall.h>
 #include <lunaix/syscall_utils.h>

+#include <lunaix/owloysius.h>

 
 #include <klibc/strfmt.h>
 #include <klibc/string.h>
 
 static DEFINE_LLIST(root_list);
 
 
 #include <klibc/strfmt.h>
 #include <klibc/string.h>
 
 static DEFINE_LLIST(root_list);
 

-static volatile u32_t devid = 0;
-
-struct devclass default_devclass = {};
+morph_t* device_mobj_root;

 
 void
 
 void

-device_setname_vargs(struct device* dev, char* fmt, va_list args)
+device_setname_vargs(struct device_meta* dev, char* fmt, va_list args)

 {
 {

-    size_t strlen =
-      ksnprintfv(dev->name_val, fmt, DEVICE_NAME_SIZE, args);
-
-    dev->name = HSTR(dev->name_val, strlen);
-
-    hstr_rehash(&dev->name, HSTR_FULL_HASH);
+    ksnprintfv(dev->name_val, fmt, DEVICE_NAME_SIZE, args);
+    changeling_setname(dev_mobj(dev), dev->name_val);

 }
 
 void
 }
 
 void

-device_register(struct device* dev, struct devclass* class, char* fmt, ...)
+device_register_generic(struct device_meta* devm, struct devclass* class, 
+                        char* fmt, ...)

 {
     va_list args;
 {
     va_list args;

+    morph_t* morphed, *parent;
+
+    morphed = &devm->mobj;

     va_start(args, fmt);
 
     if (fmt) {
     va_start(args, fmt);
 
     if (fmt) {

-        device_setname_vargs(dev, fmt, args);
+        device_setname_vargs(devm, fmt, args);

     }
 
     }
 

-    if (class) {
-        dev->ident = (struct devident){ .fn_grp = class->fn_grp,
-                                        .unique = DEV_UNIQUE(class->device,
-                                                             class->variant) };
+    if (class && morph_type_of(morphed, device_morpher)) 
+    {
+        struct device* dev = to_dev(devm);
+        dev->ident = (struct devident) { 
+            .fn_grp = class->fn_grp,
+            .unique = DEV_UNIQUE(class->device, class->variant) 
+        };

     }
 
     }
 

-    dev->dev_uid = devid++;
-
-    struct device* parent = dev->parent;
+    parent = morphed->parent;

     if (parent) {
     if (parent) {

-        assert((parent->dev_type & DEV_MSKIF) == DEV_IFCAT);
-        llist_append(&parent->children, &dev->siblings);
-    } else {
-        llist_append(&root_list, &dev->siblings);
+        changeling_attach(parent, morphed);

     }
 
     va_end(args);
 }
 
 void
     }
 
     va_end(args);
 }
 
 void

-device_create(struct device* dev,
-              struct device* parent,
-              u32_t type,
-              void* underlay)
+device_create(struct device* dev, struct device_meta* parent,
+              u32_t type, void* underlay)

 {
 {

-    dev->magic = DEV_STRUCT_MAGIC;

     dev->underlay = underlay;
     dev->dev_type = type;
     dev->underlay = underlay;
     dev->dev_type = type;

-    dev->parent = parent;

 
 

-    llist_init_head(&dev->children);
+    llist_init_head(&dev->potentium);

     mutex_init(&dev->lock);
     mutex_init(&dev->lock);

+    iopoll_init_evt_q(&dev->pollers);

 }
 
 struct device*
 }
 
 struct device*

-device_alloc(struct device* parent, u32_t type, void* underlay)
+device_alloc(struct device_meta* parent, u32_t type, void* underlay)

 {
     struct device* dev = vzalloc(sizeof(struct device));
 
 {
     struct device* dev = vzalloc(sizeof(struct device));
 


@@ -82,12 +75,43 @@ device_alloc(struct device* parent, u32_t type, void* underlay)
     }
 
     device_create(dev, parent, type, underlay);
     }
 
     device_create(dev, parent, type, underlay);

+    changeling_morph(dev_morph(parent), dev->mobj, NULL, device_morpher);
+
+    return dev;
+}
+
+struct device_alias*
+device_alloc_alias(struct device_meta* parent, struct device_meta* aliased)
+{
+    struct device_alias* dev = vzalloc(sizeof(struct device_alias));
+
+    if (!dev) {
+        return NULL;
+    }
+
+    dev->alias = aliased;
+    changeling_ref(dev_mobj(aliased));
+    changeling_morph(dev_morph(parent), dev->mobj, NULL, devalias_morpher);
+
+    return dev;
+}
+
+struct device_cat*
+device_alloc_cat(struct device_meta* parent)
+{
+    struct device_cat* dev = vzalloc(sizeof(struct device_cat));
+
+    if (!dev) {
+        return NULL;
+    }
+
+    changeling_morph(dev_morph(parent), dev->mobj, NULL, devcat_morpher);

 
     return dev;
 }
 
 void
 
     return dev;
 }
 
 void

-device_setname(struct device* dev, char* fmt, ...)
+device_setname(struct device_meta* dev, char* fmt, ...)

 {
     va_list args;
     va_start(args, fmt);
 {
     va_list args;
     va_start(args, fmt);


@@ -97,82 +121,44 @@ device_setname(struct device* dev, char* fmt, ...)
     va_end(args);
 }
 
     va_end(args);
 }
 

-struct device*
-device_addcat(struct device* parent, char* name_fmt, ...)
+struct device_cat*
+device_addcat(struct device_meta* parent, char* name_fmt, ...)

 {
     va_list args;
     va_start(args, name_fmt);
 
 {
     va_list args;
     va_start(args, name_fmt);
 

-    struct device* dev = device_alloc(parent, DEV_IFCAT, NULL);
+    struct device_cat* dev = device_alloc_cat(parent);

 
 

-    device_setname_vargs(dev, name_fmt, args);
-    device_register(dev, NULL, NULL);
+    device_setname_vargs(dev_meta(dev), name_fmt, args);
+    device_register_generic(dev_meta(dev), NULL, NULL);

 
     va_end(args);
     return dev;
 }
 
 
     va_end(args);
     return dev;
 }
 

-struct device*
-device_getbyid(struct llist_header* devlist, u32_t id)
+struct device_alias*
+device_addalias(struct device_meta* parent, 
+                struct device_meta* aliased, char* name_fmt, ...)

 {
 {

-    devlist = devlist ? devlist : &root_list;
-    struct device *pos, *n;
-    llist_for_each(pos, n, devlist, siblings)
-    {
-        if (pos->dev_uid == id) {
-            return pos;
-        }
-    }
-
-    return NULL;
-}
-
-struct device*
-device_getbyhname(struct device* root_dev, struct hstr* name)
-{
-    struct llist_header* devlist = root_dev ? &root_dev->children : &root_list;
-    struct device *pos, *n;
-    llist_for_each(pos, n, devlist, siblings)
-    {
-        if (HSTR_EQ(&pos->name, name)) {
-            return pos;
-        }
-    }
+    va_list args;
+    va_start(args, name_fmt);

 
 

-    return NULL;
-}
+    struct device_alias* dev = device_alloc_alias(parent, aliased);

 
 

-struct device*
-device_getbyname(struct device* root_dev, const char* name, size_t len)
-{
-    struct hstr hname = HSTR(name, len);
-    hstr_rehash(&hname, HSTR_FULL_HASH);
+    device_setname_vargs(dev_meta(dev), name_fmt, args);
+    device_register_generic(dev_meta(dev), NULL, NULL);

 
 

-    return device_getbyhname(root_dev, &hname);
+    va_end(args);
+    return dev;

 }
 
 void
 }
 
 void

-device_remove(struct device* dev)
+device_remove(struct device_meta* dev)

 {
 {

-    llist_delete(&dev->siblings);
+    changeling_isolate(&dev->mobj);

     vfree(dev);
 }
 
     vfree(dev);
 }
 

-struct device*
-device_getbyoffset(struct device* root_dev, int offset)
-{
-    struct llist_header* devlist = root_dev ? &root_dev->children : &root_list;
-    struct device *pos, *n;
-    int off = 0;
-    llist_for_each(pos, n, devlist, siblings)
-    {
-        if (off++ >= offset) {
-            return pos;
-        }
-    }
-    return NULL;
-}
-

 void
 device_populate_info(struct device* dev, struct dev_info* devinfo)
 {
 void
 device_populate_info(struct device* dev, struct dev_info* devinfo)
 {


@@ -190,28 +176,110 @@ device_populate_info(struct device* dev, struct dev_info* devinfo)
     devinfo->dev_name.buf[buflen - 1] = 0;
 }
 
     devinfo->dev_name.buf[buflen - 1] = 0;
 }
 

-struct device*
-device_cast(void* obj)
+morph_t*
+resolve_device_morph(void* maybe_dev)
+{
+    struct device_alias* da = NULL;
+    morph_t *morphed;
+    
+    morphed = morphed_ptr(maybe_dev);
+
+    if (!is_changeling(morphed)) {
+        return NULL;
+    }
+
+    if (morph_type_of(morphed, device_morpher)) 
+    {
+        return morphed;
+    }
+
+    if (morph_type_of(morphed, devcat_morpher)) 
+    {
+        return morphed;
+    }
+
+    while(morph_type_of(morphed, devalias_morpher)) 
+    {
+        da = changeling_reveal(morphed, devalias_morpher);
+        morphed = &da->alias->mobj;
+    }
+
+    return da ? morphed : NULL;
+}
+
+void
+device_alert_poller(struct device* dev, int poll_evt)
+{
+    dev->poll_evflags = poll_evt;
+    iopoll_wake_pollers(&dev->pollers);
+}
+
+void
+device_chain_loader(struct device_def* def, devdef_ldfn fn)
+{
+    struct device_ldfn_chain* node;
+
+    node = valloc(sizeof(*node));
+    node->load = fn;
+
+    if (!def->load_chain) {
+        node->chain = NULL;
+    }
+    else {
+        node->chain = def->load_chain;
+    }
+
+    def->load_chain = node;
+}
+
+void
+device_chain_load_once(struct device_def* def)

 {
 {

-    struct device* dev = (struct device*)obj;
-    if (dev && dev->magic == DEV_STRUCT_MAGIC) {
-        return dev;
+    struct device_ldfn_chain *node, *next;
+
+    if (def->load) {
+        def->load(def);

     }
 
     }
 

-    return NULL;
+    node = def->load_chain;
+    def->load_chain = NULL;
+    
+    while (node)
+    {
+        node->load(def);
+        next = node->chain;
+        vfree(node);
+
+        node = next;
+    }
+
+    if (def->flags.no_default_realm) {
+        return;
+    }
+
+    if (!def->create) {
+        return;
+    }
+
+    def->create(def, NULL);
+    

 }
 
 }
 

-__DEFINE_LXSYSCALL3(int, ioctl, int, fd, int, req, va_list, args)
+__DEFINE_LXSYSCALL3(int, ioctl, int, fd, int, req, sc_va_list, _args)

 {
     int errno = -1;
     struct v_fd* fd_s;
 {
     int errno = -1;
     struct v_fd* fd_s;

+    va_list args;
+
+    convert_valist(&args, _args);
+

     if ((errno &= vfs_getfd(fd, &fd_s))) {
         goto done;
     }
 
     if ((errno &= vfs_getfd(fd, &fd_s))) {
         goto done;
     }
 

-    struct device* dev = (struct device*)fd_s->file->inode->data;
-    if (dev->magic != DEV_STRUCT_MAGIC) {
-        errno &= ENODEV;
+    struct device* dev = resolve_device(fd_s->file->inode->data);
+    if (!dev) {
+        errno = ENODEV;

         goto done;
     }
 
         goto done;
     }
 


@@ -222,12 +290,19 @@ __DEFINE_LXSYSCALL3(int, ioctl, int, fd, int, req, va_list, args)
     }
 
     if (!dev->ops.exec_cmd) {
     }
 
     if (!dev->ops.exec_cmd) {

-        errno &= ENOTSUP;
+        errno = ENOTSUP;

         goto done;
     }
 
         goto done;
     }
 

-    errno &= dev->ops.exec_cmd(dev, req, args);
+    errno = dev->ops.exec_cmd(dev, req, args);

 
 done:
     return DO_STATUS_OR_RETURN(errno);
 
 done:
     return DO_STATUS_OR_RETURN(errno);

-}
\ No newline at end of file
+}
+
+static void
+__device_subsys_init()
+{
+    device_mobj_root = changeling_spawn(NULL, "devices");
+}
+owloysius_fetch_init(__device_subsys_init, on_sysconf);
\ No newline at end of file