diff options
| author | Davidlohr Bueso <dave@stgolabs.net> | 2023-06-12 21:10:34 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-06-26 00:54:51 +0300 |
| commit | 0c36b6ad436a38b167af16e6c690c890b8b2df62 (patch) | |
| tree | bd72d99f338a3a05b50949e769be2ced8aa328f1 /drivers/cxl/cxlmem.h | |
| parent | 9968c9dd568e83f57fdc1f6127f8b369a0594991 (diff) | |
| download | linux-0c36b6ad436a38b167af16e6c690c890b8b2df62.tar.xz | |
cxl/mbox: Add sanitization handling machinery
Sanitization is by definition a device-monopolizing operation, and thus
the timeslicing rules for other background commands do not apply.
As such handle this special case asynchronously and return immediately.
Subsequent changes will allow completion to be pollable from userspace
via a sysfs file interface.
For devices that don't support interrupts for notifying background
command completion, self-poll with the caveat that the poller can
be out of sync with the ready hardware, and therefore care must be
taken to not allow any new commands to go through until the poller
sees the hw completion. The poller takes the mbox_mutex to stabilize
the flagging, minimizing any runtime overhead in the send path to
check for 'sanitize_tmo' for uncommon poll scenarios.
The irq case is much simpler as hardware will serialize/error
appropriately.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20230612181038.14421-4-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 091f1200736b..698cd10aea4a 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -264,9 +264,15 @@ struct cxl_poison_state { * struct cxl_security_state - Device security state * * @state: state of last security operation + * @poll: polling for sanitization is enabled, device has no mbox irq support + * @poll_tmo_secs: polling timeout + * @poll_dwork: polling work item */ struct cxl_security_state { unsigned long state; + bool poll; + int poll_tmo_secs; + struct delayed_work poll_dwork; }; /** @@ -379,6 +385,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_SCAN_MEDIA_CAPS = 0x4303, CXL_MBOX_OP_SCAN_MEDIA = 0x4304, CXL_MBOX_OP_GET_SCAN_MEDIA = 0x4305, + CXL_MBOX_OP_SANITIZE = 0x4400, CXL_MBOX_OP_GET_SECURITY_STATE = 0x4500, CXL_MBOX_OP_SET_PASSPHRASE = 0x4501, CXL_MBOX_OP_DISABLE_PASSPHRASE = 0x4502, |