diff options
| author | Vishal Verma <vishal.l.verma@intel.com> | 2021-05-20 13:47:45 -0600 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-05-26 11:20:17 -0700 |
| commit | 199cf8c3feec2947015da84643312790b21531cb (patch) | |
| tree | 423f8a0f2517fc3a4a78b1463a88986b4ed0d383 /drivers/cxl/mem.h | |
| parent | 21e9f76733a8c152b794cba5463ff9bf2db919d4 (diff) | |
cxl/pci.c: Add a 'label_storage_size' attribute to the memdev
The 'Identify Device' mailbox command returns an 'lsa_size', which is
the size of the label storage area on the device. Export it as a sysfs
attribute so that userspace tooling to read/write the LSA can determine
the size without having to run an 'Identify Device' on their own.
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20210520194745.1095517-1-vishal.l.verma@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/mem.h')
| -rw-r--r-- | drivers/cxl/mem.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cxl/mem.h b/drivers/cxl/mem.h index 0a3f70316872..23fc40dde27e 100644 --- a/drivers/cxl/mem.h +++ b/drivers/cxl/mem.h @@ -54,6 +54,8 @@ struct cxl_memdev { * @regs: Parsed register blocks * @payload_size: Size of space for payload * (CXL 2.0 8.2.8.4.3 Mailbox Capabilities Register) + * @lsa_size: Size of Label Storage Area + * (CXL 2.0 8.2.9.5.1.1 Identify Memory Device) * @mbox_mutex: Mutex to synchronize mailbox access. * @firmware_version: Firmware version for the memory device. * @enabled_cmds: Hardware commands found enabled in CEL. @@ -68,6 +70,7 @@ struct cxl_mem { struct cxl_regs regs; size_t payload_size; + size_t lsa_size; struct mutex mbox_mutex; /* Protects device mailbox and firmware */ char firmware_version[0x10]; unsigned long *enabled_cmds; |