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cxl/mbox: Add Clear Log mailbox command

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Adding UAPI support for CXL r3.1 8.2.9.5.4
Clear Log command.

This proposed patch will be useful for clearing and populating
the Vendor debug log in certain scenarios, allowing for the
aggregation of results over time.

Signed-off-by: Srinivasulu Thanneeru <sthanneeru.opensrc@micron.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240313071218.729-3-sthanneeru.opensrc@micron.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Srinivasulu Thanneeru 2024-03-13 12:42:18 +05:30 • committed by Dave Jiang
parent 940325add1
commit 206f9fa9d5
3 changed files with 12 additions and 0 deletions
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10
drivers/cxl/core/mbox.c
View file

@ -57,6 +57,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
CXL_CMD(GET_HEALTH_INFO, 0, 0x12, 0),
CXL_CMD(GET_LOG, 0x18, CXL_VARIABLE_PAYLOAD, CXL_CMD_FLAG_FORCE_ENABLE),
CXL_CMD(GET_LOG_CAPS, 0x10, 0x4, 0),
CXL_CMD(CLEAR_LOG, 0x10, 0, 0),
CXL_CMD(GET_SUP_LOG_SUBLIST, 0x2, CXL_VARIABLE_PAYLOAD, 0),
CXL_CMD(SET_PARTITION_INFO, 0x0a, 0, 0),
CXL_CMD(SET_LSA, CXL_VARIABLE_PAYLOAD, 0, 0),
@ -333,6 +334,15 @@ static bool cxl_payload_from_user_allowed(u16 opcode, void *payload_in)
return false;
break;
}
case CXL_MBOX_OP_CLEAR_LOG: {
const uuid_t *uuid = (uuid_t *)payload_in;
/*
* Restrict the ‘Clear log’ action to only apply to
* Vendor debug logs.
*/
return uuid_equal(uuid, &DEFINE_CXL_VENDOR_DEBUG_UUID);
}
default:
break;
}

1
drivers/cxl/cxlmem.h
View file

@ -528,6 +528,7 @@ enum cxl_opcode {
CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400,
CXL_MBOX_OP_GET_LOG = 0x0401,
CXL_MBOX_OP_GET_LOG_CAPS = 0x0402,
CXL_MBOX_OP_CLEAR_LOG = 0x0403,
CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0x0405,
CXL_MBOX_OP_IDENTIFY = 0x4000,
CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100,

1
include/uapi/linux/cxl_mem.h
View file

@ -48,6 +48,7 @@
___DEPRECATED(GET_SCAN_MEDIA, "Get Scan Media Results"), \
___C(GET_TIMESTAMP, "Get Timestamp"), \
___C(GET_LOG_CAPS, "Get Log Capabilities"), \
___C(CLEAR_LOG, "Clear Log"), \
___C(GET_SUP_LOG_SUBLIST, "Get Supported Logs Sub-List"), \
___C(MAX, "invalid / last command")