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| author | Tyrel Datwyler <tyreld@linux.ibm.com> | 2021-04-02 03:13:25 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-20 07:22:24 +0300 |
| commit | 39d0099f94390eb7a677e1a5c9bb56a4daa242a1 (patch) | |
| tree | 581ebaaa32930995e7409ae40fd58882cf7b9967 /arch/powerpc/include | |
| parent | af31fd0c9107e400a8eb89d0eafb40bb78802f79 (diff) | |
| download | linux-39d0099f94390eb7a677e1a5c9bb56a4daa242a1.tar.xz | |
powerpc/pseries: Add shutdown() to vio_driver and vio_bus
Currently, neither the vio_bus or vio_driver structures provide support
for a shutdown() routine.
Add support for shutdown() by allowing drivers to provide a
implementation via function pointer in their vio_driver struct and
provide a proper implementation in the driver template for the vio_bus
that calls a vio drivers shutdown() if defined.
In the case that no shutdown() is defined by a vio driver and a kexec is
in progress we implement a big hammer that calls remove() to ensure no
further DMA for the devices is possible.
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210402001325.939668-1-tyreld@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/vio.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/vio.h b/arch/powerpc/include/asm/vio.h index 721c0d6715ac..e7479a4abf96 100644 --- a/arch/powerpc/include/asm/vio.h +++ b/arch/powerpc/include/asm/vio.h @@ -114,6 +114,7 @@ struct vio_driver { const struct vio_device_id *id_table; int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); void (*remove)(struct vio_dev *dev); + void (*shutdown)(struct vio_dev *dev); /* A driver must have a get_desired_dma() function to * be loaded in a CMO environment if it uses DMA. */ |