[rtems-libbsd commit] Adding RTEMS support for FREEBSD TTY
Sebastian Huber
sebh at rtems.org
Thu May 11 09:23:18 UTC 2017
Module: rtems-libbsd
Branch: master
Commit: 880a17cb0b8a3a47390c9a1904ee82335cc8eabb
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=880a17cb0b8a3a47390c9a1904ee82335cc8eabb
Author: Kevin Kirspel <kevin-kirspel at idexx.com>
Date: Thu May 4 08:27:59 2017 -0400
Adding RTEMS support for FREEBSD TTY
---
rtemsbsd/include/machine/rtems-bsd-commands.h | 2 +
rtemsbsd/include/machine/rtems-bsd-kernel-space.h | 1 +
rtemsbsd/include/rtems/bsd/local/opt_gdb.h | 1 +
rtemsbsd/include/rtems/netcmds-config.h | 2 +
rtemsbsd/rtems/rtems-bsd-shell-stty.c | 40 +++++++++++
rtemsbsd/sys/fs/devfs/devfs_devs.c | 86 +++++++++++++++++++++--
6 files changed, 126 insertions(+), 6 deletions(-)
diff --git a/rtemsbsd/include/machine/rtems-bsd-commands.h b/rtemsbsd/include/machine/rtems-bsd-commands.h
index c0524c8..9e9ed1c 100644
--- a/rtemsbsd/include/machine/rtems-bsd-commands.h
+++ b/rtemsbsd/include/machine/rtems-bsd-commands.h
@@ -70,6 +70,8 @@ int rtems_bsd_command_vmstat(int argc, char **argv);
int rtems_bsd_command_wlanstats(int argc, char **argv);
+int rtems_bsd_command_stty(int argc, char **argv);
+
__END_DECLS
#endif /* _RTEMS_BSD_MACHINE_RTEMS_BSD_COMMANDS_H_ */
diff --git a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
index 10ce9d2..9d0484a 100644
--- a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
+++ b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
@@ -48,6 +48,7 @@
#define __GLOBL(sym) __GLOBL1(sym)
#define O_CLOEXEC 0
+#define IO_NDELAY O_NONBLOCK
#define __FreeBSD__ 1
diff --git a/rtemsbsd/include/rtems/bsd/local/opt_gdb.h b/rtemsbsd/include/rtems/bsd/local/opt_gdb.h
new file mode 100644
index 0000000..936ffd8
--- /dev/null
+++ b/rtemsbsd/include/rtems/bsd/local/opt_gdb.h
@@ -0,0 +1 @@
+/* EMPTY */
diff --git a/rtemsbsd/include/rtems/netcmds-config.h b/rtemsbsd/include/rtems/netcmds-config.h
index b3bc66f..515b265 100644
--- a/rtemsbsd/include/rtems/netcmds-config.h
+++ b/rtemsbsd/include/rtems/netcmds-config.h
@@ -45,6 +45,8 @@ extern rtems_shell_cmd_t rtems_shell_VMSTAT_Command;
extern rtems_shell_cmd_t rtems_shell_WLANSTATS_Command;
+extern rtems_shell_cmd_t rtems_shell_STTY_Command;
+
#ifdef __cplusplus
}
#endif /* __cplusplus */
diff --git a/rtemsbsd/rtems/rtems-bsd-shell-stty.c b/rtemsbsd/rtems/rtems-bsd-shell-stty.c
new file mode 100644
index 0000000..530b442
--- /dev/null
+++ b/rtemsbsd/rtems/rtems-bsd-shell-stty.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2016 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Dornierstr. 4
+ * 82178 Puchheim
+ * Germany
+ * <rtems at embedded-brains.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <rtems/netcmds-config.h>
+#include <machine/rtems-bsd-commands.h>
+
+rtems_shell_cmd_t rtems_shell_STTY_Command = {
+ .name = "stty",
+ .usage = "stty [args]",
+ .topic = "serial",
+ .command = rtems_bsd_command_stty
+};
diff --git a/rtemsbsd/sys/fs/devfs/devfs_devs.c b/rtemsbsd/sys/fs/devfs/devfs_devs.c
old mode 100755
new mode 100644
index 0ee71ff..a91a02e
--- a/rtemsbsd/sys/fs/devfs/devfs_devs.c
+++ b/rtemsbsd/sys/fs/devfs/devfs_devs.c
@@ -36,6 +36,7 @@
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/malloc.h>
+#include <sys/proc.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@@ -50,8 +51,16 @@
const char rtems_cdev_directory[] = RTEMS_CDEV_DIRECTORY;
+/*
+ * The one true (but secret) list of active devices in the system.
+ * Locked by dev_lock()/devmtx
+ */
+struct cdev_priv_list cdevp_list = TAILQ_HEAD_INITIALIZER(cdevp_list);
+
struct unrhdr *devfs_inos;
+static MALLOC_DEFINE(M_CDEVP, "DEVFS1", "DEVFS cdev_priv storage");
+
static struct cdev *
devfs_imfs_get_context_by_iop(rtems_libio_t *iop)
{
@@ -62,11 +71,19 @@ static int
devfs_imfs_open(rtems_libio_t *iop, const char *path, int oflag, mode_t mode)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
+ struct file *fpop;
int error;
if (td != NULL) {
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
error = cdev->si_devsw->d_open(cdev, oflag, 0, td);
+ /* Clean up any cdevpriv upon error. */
+ if (error != 0)
+ devfs_clear_cdevpriv();
+ curthread->td_fpop = fpop;
} else {
error = ENOMEM;
}
@@ -78,12 +95,17 @@ static int
devfs_imfs_close(rtems_libio_t *iop)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
int flags = rtems_libio_to_fcntl_flags(iop->flags);
+ struct file *fpop;
int error;
if (td != NULL) {
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
error = cdev->si_devsw->d_close(cdev, flags, 0, td);
+ curthread->td_fpop = fpop;
} else {
error = ENOMEM;
}
@@ -96,6 +118,7 @@ devfs_imfs_readv(rtems_libio_t *iop, const struct iovec *iov, int iovcnt,
ssize_t total)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
struct uio uio = {
.uio_iov = __DECONST(struct iovec *, iov),
@@ -106,11 +129,15 @@ devfs_imfs_readv(rtems_libio_t *iop, const struct iovec *iov, int iovcnt,
.uio_rw = UIO_READ,
.uio_td = td
};
+ struct file *fpop;
int error;
if (td != NULL) {
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
error = cdev->si_devsw->d_read(cdev, &uio,
rtems_libio_to_fcntl_flags(iop->flags));
+ td->td_fpop = fpop;
} else {
error = ENOMEM;
}
@@ -138,6 +165,7 @@ devfs_imfs_writev(rtems_libio_t *iop, const struct iovec *iov, int iovcnt,
ssize_t total)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
struct uio uio = {
.uio_iov = __DECONST(struct iovec *, iov),
@@ -148,11 +176,15 @@ devfs_imfs_writev(rtems_libio_t *iop, const struct iovec *iov, int iovcnt,
.uio_rw = UIO_WRITE,
.uio_td = td
};
+ struct file *fpop;
int error;
if (td != NULL) {
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
error = cdev->si_devsw->d_write(cdev, &uio,
rtems_libio_to_fcntl_flags(iop->flags));
+ td->td_fpop = fpop;
} else {
error = ENOMEM;
}
@@ -179,13 +211,18 @@ static int
devfs_imfs_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
struct thread *td = rtems_bsd_get_curthread_or_null();
+ struct file *fpop;
int error;
int flags = rtems_libio_to_fcntl_flags(iop->flags);
if (td != 0) {
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
error = cdev->si_devsw->d_ioctl(cdev, request, buffer, flags,
td);
+ td->td_fpop = fpop;
} else {
error = ENOMEM;
}
@@ -197,17 +234,34 @@ static int
devfs_imfs_poll(rtems_libio_t *iop, int events)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
+ struct thread *td = rtems_bsd_get_curthread_or_wait_forever();
+ struct file *fpop;
+ int error;
+
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
+ error = cdev->si_devsw->d_poll(cdev, events, td);
+ td->td_fpop = fpop;
- return (cdev->si_devsw->d_poll(cdev, events,
- rtems_bsd_get_curthread_or_wait_forever()));
+ return error;
}
static int
devfs_imfs_kqfilter(rtems_libio_t *iop, struct knote *kn)
{
struct cdev *cdev = devfs_imfs_get_context_by_iop(iop);
+ struct file *fp = rtems_bsd_iop_to_fp(iop);
+ struct thread *td = rtems_bsd_get_curthread_or_wait_forever();
+ struct file *fpop;
+ int error;
+
+ fpop = td->td_fpop;
+ curthread->td_fpop = fp;
+ error = cdev->si_devsw->d_kqfilter(cdev, kn);
+ td->td_fpop = fpop;
- return (cdev->si_devsw->d_kqfilter(cdev, kn));
+ return error;
}
static const rtems_filesystem_file_handlers_r devfs_imfs_handlers = {
@@ -235,12 +289,17 @@ static const IMFS_node_control devfs_imfs_control = IMFS_GENERIC_INITIALIZER(
struct cdev *
devfs_alloc(int flags)
{
+ struct cdev_priv *cdp;
struct cdev *cdev;
- cdev = malloc(sizeof *cdev, M_TEMP, M_ZERO);
- if (cdev == NULL)
+ cdp = malloc(sizeof *cdp, M_CDEVP, M_ZERO |
+ ((flags & MAKEDEV_NOWAIT) ? M_NOWAIT : M_WAITOK));
+ if (cdp == NULL)
return (NULL);
+ cdev = &cdp->cdp_c;
+ LIST_INIT(&cdev->si_children);
+
memcpy(cdev->si_path, rtems_cdev_directory, sizeof(cdev->si_path));
return (cdev);
}
@@ -248,7 +307,11 @@ devfs_alloc(int flags)
void
devfs_free(struct cdev *cdev)
{
- free(cdev, M_TEMP);
+ struct cdev_priv *cdp;
+
+ cdp = cdev2priv(cdev);
+ devfs_free_cdp_inode(cdp->cdp_inode);
+ free(cdp, M_CDEVP);
}
/*
@@ -286,6 +349,7 @@ devfs_create_directory(const char *devname)
void
devfs_create(struct cdev *dev)
{
+ struct cdev_priv *cdp;
int rv;
mode_t mode = S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO;
@@ -294,13 +358,23 @@ devfs_create(struct cdev *dev)
rv = IMFS_make_generic_node(dev->si_path, mode, &devfs_imfs_control,
dev);
BSD_ASSERT(rv == 0);
+
+ cdp = cdev2priv(dev);
+ cdp->cdp_flags |= CDP_ACTIVE;
+ cdp->cdp_inode = alloc_unrl(devfs_inos);
+ dev_refl(dev);
+ TAILQ_INSERT_TAIL(&cdevp_list, cdp, cdp_list);
}
void
devfs_destroy(struct cdev *dev)
{
+ struct cdev_priv *cdp;
int rv;
+ cdp = cdev2priv(dev);
+ cdp->cdp_flags &= ~CDP_ACTIVE;
+
rv = unlink(dev->si_path);
BSD_ASSERT(rv == 0);
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