cxl/mbox: Add GET_POISON_LIST mailbox command

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CXL devices maintain a list of locations that are poisoned or result
in poison if the addresses are accessed by the host.

Per the spec, (CXL 3.0 8.2.9.8.4.1), the device returns this Poison
list as a set of Media Error Records that include the source of the
error, the starting device physical address, and length. The length is
the number of adjacent DPAs in the record and is in units of 64 bytes.

Retrieve the poison list.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/a1f332e817834ef8e89c0ff32e760308fb903346.1681838291.git.alison.schofield@intel.com
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Alison Schofield 2023-04-18 10:39:04 -07:00 • committed by Dan Williams

parent d0abf5787a

commit ed83f7ca39

2 changed files with 101 additions and 0 deletions

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55

drivers/cxl/core/mbox.c

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46

drivers/cxl/cxlmem.h

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