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authorJag Raman <jag.raman@oracle.com>2017-08-15 23:03:09 +0200
committerDavid S. Miller <davem@davemloft.net>2017-08-16 06:33:54 +0200
commit8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb (patch)
tree31a734e944e0956f33e11ea65f73c6de9bc1d921 /drivers/tty/vcc.c
parentsparc64: vcc: Add break_ctl TTY operation (diff)
downloadlinux-8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb.tar.xz
linux-8f03f948ba356b7cb254b45a4e78b5b3d86fd3bb.zip
sparc64: vcc: Add install & cleanup TTY operations
Add handlers to support TTY install & cleanup operations Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Reviewed-by: Liam Merwick <liam.merwick@oracle.com> Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/tty/vcc.c')
-rw-r--r--drivers/tty/vcc.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index f913217159ee..5e608173b091 100644
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -487,6 +487,8 @@ static struct vio_version vcc_versions[] = {
{ .major = 1, .minor = 0 },
};
+static struct tty_port_operations vcc_port_ops = { 0 };
+
static ssize_t vcc_sysfs_domain_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -994,6 +996,75 @@ static int vcc_break_ctl(struct tty_struct *tty, int state)
return 0;
}
+static int vcc_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct vcc_port *port_vcc;
+ struct tty_port *port_tty;
+ int ret;
+
+ if (unlikely(!tty)) {
+ pr_err("VCC: install: Invalid TTY handle\n");
+ return -ENXIO;
+ }
+
+ if (tty->index >= VCC_MAX_PORTS)
+ return -EINVAL;
+
+ ret = tty_standard_install(driver, tty);
+ if (ret)
+ return ret;
+
+ port_tty = kzalloc(sizeof(struct tty_port), GFP_KERNEL);
+ if (!port_tty)
+ return -ENOMEM;
+
+ port_vcc = vcc_get(tty->index, true);
+ if (!port_vcc) {
+ pr_err("VCC: install: Failed to find VCC port\n");
+ tty->port = NULL;
+ kfree(port_tty);
+ return -ENODEV;
+ }
+
+ tty_port_init(port_tty);
+ port_tty->ops = &vcc_port_ops;
+ tty->port = port_tty;
+
+ port_vcc->tty = tty;
+
+ vcc_put(port_vcc, true);
+
+ return 0;
+}
+
+static void vcc_cleanup(struct tty_struct *tty)
+{
+ struct vcc_port *port;
+
+ if (unlikely(!tty)) {
+ pr_err("VCC: cleanup: Invalid TTY handle\n");
+ return;
+ }
+
+ port = vcc_get(tty->index, true);
+ if (port) {
+ port->tty = NULL;
+
+ if (port->removed) {
+ vcc_table_remove(tty->index);
+ kfree(port->vio.name);
+ kfree(port->domain);
+ kfree(port);
+ } else {
+ vcc_put(port, true);
+ }
+ }
+
+ tty_port_destroy(tty->port);
+ kfree(tty->port);
+ tty->port = NULL;
+}
+
static const struct tty_operations vcc_ops = {
.open = vcc_open,
.close = vcc_close,
@@ -1002,6 +1073,8 @@ static const struct tty_operations vcc_ops = {
.write_room = vcc_write_room,
.chars_in_buffer = vcc_chars_in_buffer,
.break_ctl = vcc_break_ctl,
+ .install = vcc_install,
+ .cleanup = vcc_cleanup,
};
#define VCC_TTY_FLAGS (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW)