[PULL 07/25] bsd-user: ioctl: add common definitions

[Warner Losh <imp@bsdimp.com>]

From: Stacey Son <sson@FreeBSD.org>

Modeled on sys/ioccom.h.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/freebsd/os-ioctl-ioccom.h | 43 ++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 bsd-user/freebsd/os-ioctl-ioccom.h

diff --git a/bsd-user/freebsd/os-ioctl-ioccom.h b/bsd-user/freebsd/os-ioctl-ioccom.h
new file mode 100644
index 0000000000..3bb9ef2710
--- /dev/null
+++ b/bsd-user/freebsd/os-ioctl-ioccom.h
@@ -0,0 +1,43 @@
+/*
+ * FreeBSD ioccom definitions for ioctl(2) emulation
+ *
+ * Copyright (c) 2013 Stacey D. Son
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H
+#define BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H
+
+/*
+ * Ioctl's have the command encoded in the lower word, and the size of
+ * any in or out parameters in the upper word.  The high 3 bits of the
+ * upper word are used to encode the in/out status of the parameter.
+ */
+/* number of bits for ioctl size */
+#define TARGET_IOCPARM_SHIFT    13
+
+/* parameter length mask */
+#define TARGET_IOCPARM_MASK ((1 << TARGET_IOCPARM_SHIFT) - 1)
+
+#define TARGET_IOCPARM_LEN(x)   (((x) >> 16) & TARGET_IOCPARM_MASK)
+#define TARGET_IOCBASECMD(x)    ((x) & ~(TARGET_IOCPARM_MASK << 16))
+#define TARGET_IOCGROUP(x)  (((x) >> 8) & 0xff)
+
+#define TARGET_IOCPARM_MAX  (1 << TARGET_IOCPARM_SHIFT) /* max size of ioctl */
+#define TARGET_IOC_VOID     0x20000000  /* no parameters */
+#define TARGET_IOC_OUT      0x40000000  /* copy out parameters */
+#define TARGET_IOC_IN       0x80000000  /* copy in parameters */
+#define TARGET_IOC_INOUT    (TARGET_IOC_IN | TARGET_IOC_OUT)
+#define TARGET_IOC_DIRMASK  (TARGET_IOC_VOID | TARGET_IOC_OUT | TARGET_IOC_IN)
+
+#define TARGET_IOC(inout, group, num, len) ((abi_ulong) \
+    ((inout) | (((len) & TARGET_IOCPARM_MASK) << 16) | ((group) << 8) \
+     | (num)))
+#define TARGET_IO(g, n)       TARGET_IOC(TARGET_IOC_VOID,    (g), (n), 0)
+#define TARGET_IOWINT(g, n)   TARGET_IOC(TARGET_IOC_VOID,    (g), (n), sizeof(int))
+#define TARGET_IOR(g, n, t)   TARGET_IOC(TARGET_IOC_OUT, (g), (n), sizeof(t))
+#define TARGET_IOW(g, n, t)   TARGET_IOC(TARGET_IOC_IN,  (g), (n), sizeof(t))
+/* this should be _IORW, but stdio got there first */
+#define TARGET_IOWR(g, n, t)  TARGET_IOC(TARGET_IOC_INOUT,   (g), (n), sizeof(t))
+
+#endif /* BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H */
-- 
2.52.0