feat: device subsystem rework

[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 1512e6f1cb56bf2fc8f402a6243413524140a60d..b794334628ca696d4f44f0f8ab15722ac5fa5aaa 100644 (file)
--- a/lunaix-os/kernel/device/device.c
+++ b/lunaix-os/kernel/device/device.c
@@ -1,38 +1,104 @@
 #include <klibc/stdio.h>
 #include <lunaix/device.h>
+#include <lunaix/fs.h>
 #include <lunaix/fs/twifs.h>
+#include <lunaix/ioctl.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/spike.h>
+#include <lunaix/syscall.h>
+#include <lunaix/syscall_utils.h>
 
 static DEFINE_LLIST(root_list);
 
 static volatile dev_t devid = 0;
 
+void
+device_prepare(struct device* dev)
+{
+    dev->magic = DEV_STRUCT_MAGIC;
+    dev->dev_id = devid++;
+
+    llist_init_head(&dev->children);
+}
+
+static void
+device_setname_vargs(struct device* dev, char* fmt, va_list args)
+{
+    size_t strlen =
+      __ksprintf_internal(dev->name_val, fmt, DEVICE_NAME_SIZE, args);
+
+    dev->name = HSTR(dev->name_val, strlen);
+
+    hstr_rehash(&dev->name, HSTR_FULL_HASH);
+}
+
+void
+device_setname(struct device* dev, char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+
+    device_setname_vargs(dev, fmt, args);
+
+    va_end(args);
+}
+
 struct device*
-device_add(struct device* parent,
-           void* underlay,
-           char* name_fmt,
-           uint32_t type,
-           va_list args)
+device_add_vargs(struct device* parent,
+                 void* underlay,
+                 char* name_fmt,
+                 u32_t type,
+                 va_list args)
 {
     struct device* dev = vzalloc(sizeof(struct device));
 
+    device_prepare(dev);
+
     if (parent) {
         assert((parent->dev_type & DEV_MSKIF) == DEV_IFCAT);
+        llist_append(&parent->children, &dev->siblings);
+    } else {
+        llist_append(&root_list, &dev->siblings);
     }
 
-    size_t strlen =
-      __ksprintf_internal(dev->name_val, name_fmt, DEVICE_NAME_SIZE, args);
+    if (name_fmt) {
+        device_setname_vargs(dev, name_fmt, args);
+    }
 
-    dev->dev_id = devid++;
-    dev->name = HSTR(dev->name_val, strlen);
     dev->parent = parent;
     dev->underlay = underlay;
     dev->dev_type = type;
 
-    hstr_rehash(&dev->name, HSTR_FULL_HASH);
-    llist_append(&root_list, &dev->siblings);
+    return dev;
+}
+
+struct device*
+device_add(struct device* parent,
+           void* underlay,
+           u32_t type,
+           char* name_fmt,
+           ...)
+{
+    va_list args;
+    va_start(args, name_fmt);
+
+    struct device* dev =
+      device_add_vargs(parent, underlay, name_fmt, type, args);
+
+    va_end(args);
+    return dev;
+}
+
+struct device*
+device_addsys(struct device* parent, void* underlay, char* name_fmt, ...)
+{
+    va_list args;
+    va_start(args, name_fmt);
+
+    struct device* dev =
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFSEQ, args);
 
+    va_end(args);
     return dev;
 }
 
@@ -43,7 +109,7 @@ device_addseq(struct device* parent, void* underlay, char* name_fmt, ...)
     va_start(args, name_fmt);
 
     struct device* dev =
-      device_add(parent, underlay, name_fmt, DEV_IFSEQ, args);
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFSEQ, args);
 
     va_end(args);
     return dev;
@@ -56,7 +122,7 @@ device_addvol(struct device* parent, void* underlay, char* name_fmt, ...)
     va_start(args, name_fmt);
 
     struct device* dev =
-      device_add(parent, underlay, name_fmt, DEV_IFVOL, args);
+      device_add_vargs(parent, underlay, name_fmt, DEV_IFVOL, args);
 
     va_end(args);
     return dev;
@@ -68,7 +134,8 @@ device_addcat(struct device* parent, char* name_fmt, ...)
     va_list args;
     va_start(args, name_fmt);
 
-    struct device* dev = device_add(parent, NULL, name_fmt, DEV_IFCAT, args);
+    struct device* dev =
+      device_add_vargs(parent, NULL, name_fmt, DEV_IFCAT, args);
 
     va_end(args);
     return dev;
@@ -90,9 +157,9 @@ device_getbyid(struct llist_header* devlist, dev_t id)
 }
 
 struct device*
-device_getbyhname(struct llist_header* devlist, struct hstr* name)
+device_getbyhname(struct device* root_dev, struct hstr* name)
 {
-    devlist = devlist ? devlist : &root_list;
+    struct llist_header* devlist = root_dev ? &root_dev->children : &root_list;
     struct device *pos, *n;
     llist_for_each(pos, n, devlist, siblings)
     {
@@ -105,12 +172,12 @@ device_getbyhname(struct llist_header* devlist, struct hstr* name)
 }
 
 struct device*
-device_getbyname(struct llist_header* devlist, const char* name, size_t len)
+device_getbyname(struct device* root_dev, const char* name, size_t len)
 {
     struct hstr hname = HSTR(name, len);
     hstr_rehash(&hname, HSTR_FULL_HASH);
 
-    return device_getbyhname(devlist, &hname);
+    return device_getbyhname(root_dev, &hname);
 }
 
 void
@@ -121,9 +188,9 @@ device_remove(struct device* dev)
 }
 
 struct device*
-device_getbyoffset(struct llist_header* devlist, int offset)
+device_getbyoffset(struct device* root_dev, int offset)
 {
-    devlist = devlist ? devlist : &root_list;
+    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)
@@ -133,4 +200,29 @@ device_getbyoffset(struct llist_header* devlist, int offset)
         }
     }
     return NULL;
+}
+
+__DEFINE_LXSYSCALL3(int, ioctl, int, fd, int, req, va_list, args)
+{
+    int errno;
+    struct v_fd* fd_s;
+    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;
+        goto done;
+    }
+
+    if (!dev->ops.exec_cmd) {
+        errno = ENOTSUP;
+        goto done;
+    }
+
+    errno = dev->ops.exec_cmd(dev, req, args);
+
+done:
+    return DO_STATUS_OR_RETURN(errno);
 }
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