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| author | Rob Herring <robh@kernel.org> | 2017-02-02 13:48:05 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-03 10:17:02 +0100 |
| commit | c3485ee0d560b182e1e0f67d67246718739f0782 (patch) | |
| tree | db88cef8a824e3de3d40950e84bd816534719704 /include/linux | |
| parent | a380ed461f66d1b843cf13380a43a5fe790b8430 (diff) | |
| download | linux-stable-c3485ee0d560b182e1e0f67d67246718739f0782.tar.gz linux-stable-c3485ee0d560b182e1e0f67d67246718739f0782.tar.bz2 linux-stable-c3485ee0d560b182e1e0f67d67246718739f0782.zip | |
tty_port: Add port client functions
Introduce a client (upward direction) operations struct for tty_port
clients. Initially supported operations are for receiving data and write
wake-up. This will allow for having clients other than an ldisc.
Convert the calls to the ldisc to use the client ops as the default
operations.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-By: Sebastian Reichel <sre@kernel.org>
Tested-By: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/tty.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 21c0fabfed60..1017e904c0a3 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -217,12 +217,18 @@ struct tty_port_operations { /* Called on the final put of a port */ void (*destruct)(struct tty_port *port); }; - + +struct tty_port_client_operations { + int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t); + void (*write_wakeup)(struct tty_port *port); +}; + struct tty_port { struct tty_bufhead buf; /* Locked internally */ struct tty_struct *tty; /* Back pointer */ struct tty_struct *itty; /* internal back ptr */ const struct tty_port_operations *ops; /* Port operations */ + const struct tty_port_client_operations *client_ops; /* Port client operations */ spinlock_t lock; /* Lock protecting tty field */ int blocked_open; /* Waiting to open */ int count; /* Usage count */ @@ -241,6 +247,7 @@ struct tty_port { based drain is needed else set to size of fifo */ struct kref kref; /* Ref counter */ + void *client_data; }; /* tty_port::iflags bits -- use atomic bit ops */ |