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5 commits

Author SHA1 Message Date
Martin Schwidefsky
9389339f28 s390/pci: cleanup function names 
Rename s390pci_xyz to zpci_xxz and set_irq_ctrl to zpci_set_irq_ctrl.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2013-08-22 12:20:03 +02:00
Sebastian Ott
b170bad40d s390/pci: do not read data after failed load 
If a pci load instruction fails the content of the register where the
data is stored is possibly unchanged. Fix the inline assembly wrapper
__pcilg to not return stale data. Additionally fix the callers of this
function who access uninitialized variables.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2013-04-17 14:07:38 +02:00
Sebastian Ott
f0bacb7fc4 s390/pci: add exception table to load/store instructions 
Don't let pci_load and friends crash the kernel when called with
e.g. an invalid offset. Return -ENXIO instead.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2013-04-17 14:07:37 +02:00
Sebastian Ott
b2a9e87d2c s390/pci: rename instruction wrappers 
Use distinct (and hopefully sane) names for the pci instruction
wrappers.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2013-04-17 14:07:37 +02:00
Jan Glauber
cd24834130 s390/pci: base support 
Add PCI support for s390, (only 64 bit mode is supported by hardware):
- PCI facility tests
- PCI instructions: pcilg, pcistg, pcistb, stpcifc, mpcifc, rpcit
- map readb/w/l/q and writeb/w/l/q to pcilg and pcistg instructions
- pci_iomap implementation
- memcpy_fromio/toio
- pci_root_ops using special pcilg/pcistg
- device, bus and domain allocation

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 2012-11-30 15:40:45 +01:00