diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2022-11-18 00:02:01 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-01-09 16:33:56 +0300 |
| commit | fbaee7464fbb61a4cb484d9c41f14517738c80c7 (patch) | |
| tree | 84d4f4624a40ce6e2659c51e960168c2dd63d11d /drivers | |
| parent | 9603cb334a7dc30fb544a3579bcbf23ae5b04f8f (diff) | |
| download | linux-fbaee7464fbb61a4cb484d9c41f14517738c80c7.tar.xz | |
s390/tty3270: add support for diag 8c
The current code uses diag210 to infer the 3270 geometry from the
model number when running on z/VM. This doesn't work well as almost
all 3270 software clients report as 3279-2 with a custom resolution.
tty3270 assumes it has a 80x24 terminal connected because of the -2
suffix. Use diag 8c to fetch the realy geometry from z/VM.
Note that this doesn't allow dynamic resizing, i.e. reconnecting to
a z/VM session with a different geometry.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/char/raw3270.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index fb3f62ac8be4..8e6742184cc8 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -421,8 +421,19 @@ raw3270_size_device_vm(struct raw3270 *rp) int rc, model; struct ccw_dev_id dev_id; struct diag210 diag_data; + struct diag8c diag8c_data; ccw_device_get_id(rp->cdev, &dev_id); + rc = diag8c(&diag8c_data, &dev_id); + if (!rc) { + rp->model = 2; + rp->rows = diag8c_data.height; + rp->cols = diag8c_data.width; + if (diag8c_data.flags & 1) + set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags); + return; + } + diag_data.vrdcdvno = dev_id.devno; diag_data.vrdclen = sizeof(struct diag210); rc = diag210(&diag_data); |