diff options
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/cxl.txt | 55 | ||||
| -rw-r--r-- | Documentation/powerpc/eeh-pci-error-recovery.txt | 2 | ||||
| -rw-r--r-- | Documentation/powerpc/transactional_memory.txt | 2 |
3 files changed, 58 insertions, 1 deletions
diff --git a/Documentation/powerpc/cxl.txt b/Documentation/powerpc/cxl.txt index 205c1b816..d5506ba0f 100644 --- a/Documentation/powerpc/cxl.txt +++ b/Documentation/powerpc/cxl.txt @@ -116,6 +116,8 @@ Work Element Descriptor (WED) User API ======== +1. AFU character devices + For AFUs operating in AFU directed mode, two character device files will be created. /dev/cxl/afu0.0m will correspond to a master context and /dev/cxl/afu0.0s will correspond to a slave @@ -362,6 +364,59 @@ read reserved fields: For future extensions and padding + +2. Card character device (powerVM guest only) + + In a powerVM guest, an extra character device is created for the + card. The device is only used to write (flash) a new image on the + FPGA accelerator. Once the image is written and verified, the + device tree is updated and the card is reset to reload the updated + image. + +open +---- + + Opens the device and allocates a file descriptor to be used with + the rest of the API. The device can only be opened once. + +ioctl +----- + +CXL_IOCTL_DOWNLOAD_IMAGE: +CXL_IOCTL_VALIDATE_IMAGE: + Starts and controls flashing a new FPGA image. Partial + reconfiguration is not supported (yet), so the image must contain + a copy of the PSL and AFU(s). Since an image can be quite large, + the caller may have to iterate, splitting the image in smaller + chunks. + + Takes a pointer to a struct cxl_adapter_image: + struct cxl_adapter_image { + __u64 flags; + __u64 data; + __u64 len_data; + __u64 len_image; + __u64 reserved1; + __u64 reserved2; + __u64 reserved3; + __u64 reserved4; + }; + + flags: + These flags indicate which optional fields are present in + this struct. Currently all fields are mandatory. + + data: + Pointer to a buffer with part of the image to write to the + card. + + len_data: + Size of the buffer pointed to by data. + + len_image: + Full size of the image. + + Sysfs Class =========== diff --git a/Documentation/powerpc/eeh-pci-error-recovery.txt b/Documentation/powerpc/eeh-pci-error-recovery.txt index 9d4e33df6..678189280 100644 --- a/Documentation/powerpc/eeh-pci-error-recovery.txt +++ b/Documentation/powerpc/eeh-pci-error-recovery.txt @@ -12,7 +12,7 @@ Overview: The IBM POWER-based pSeries and iSeries computers include PCI bus controller chips that have extended capabilities for detecting and reporting a large variety of PCI bus error conditions. These features -go under the name of "EEH", for "Extended Error Handling". The EEH +go under the name of "EEH", for "Enhanced Error Handling". The EEH hardware features allow PCI bus errors to be cleared and a PCI card to be "rebooted", without also having to reboot the operating system. diff --git a/Documentation/powerpc/transactional_memory.txt b/Documentation/powerpc/transactional_memory.txt index ba0a2a4a5..e32fdbb4c 100644 --- a/Documentation/powerpc/transactional_memory.txt +++ b/Documentation/powerpc/transactional_memory.txt @@ -167,6 +167,8 @@ signal will be rolled back anyway. For signals taken in non-TM or suspended mode, we use the normal/non-checkpointed stack pointer. +Any transaction initiated inside a sighandler and suspended on return +from the sighandler to the kernel will get reclaimed and discarded. Failure cause codes used by kernel ================================== |