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| author | Dan Williams <dan.j.williams@intel.com> | 2022-11-29 10:48:59 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-12-03 13:40:17 -0800 |
| commit | 2905cb5236cba63a5dc8a83752dcc31f3cc819f9 (patch) | |
| tree | 7b5cd1bb0118b896d04813feef85e2f8692438ff /drivers/cxl/cxlmem.h | |
| parent | 2f6e9c305127f8dea4e2d697b4bdd33e126ccbf7 (diff) | |
| download | lwn-2905cb5236cba63a5dc8a83752dcc31f3cc819f9.tar.gz lwn-2905cb5236cba63a5dc8a83752dcc31f3cc819f9.zip | |
cxl/pci: Add (hopeful) error handling support
Add nominal error handling that tears down CXL.mem in response to error
notifications that imply a device reset. Given some CXL.mem may be
operating as System RAM, there is a high likelihood that these error
events are fatal. However, if the system survives the notification the
expectation is that the driver behavior is equivalent to a hot-unplug
and re-plug of an endpoint.
Note that this does not change the mask values from the default. That
awaits CXL _OSC support to determine whether platform firmware is in
control of the mask registers.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166974413966.1608150.15522782911404473932.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 88e3a8e54b6a..b3117fd67f42 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -186,6 +186,7 @@ struct cxl_endpoint_dvsec_info { * Currently only memory devices are represented. * * @dev: The device associated with this CXL state + * @cxlmd: The device representing the CXL.mem capabilities of @dev * @regs: Parsed register blocks * @cxl_dvsec: Offset to the PCIe device DVSEC * @payload_size: Size of space for payload @@ -218,6 +219,7 @@ struct cxl_endpoint_dvsec_info { */ struct cxl_dev_state { struct device *dev; + struct cxl_memdev *cxlmd; struct cxl_regs regs; int cxl_dvsec; |