diff options
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/mbox.c | 27 | ||||
| -rw-r--r-- | drivers/cxl/cxlmem.h | 9 | ||||
| -rw-r--r-- | drivers/cxl/pci.c | 4 |
3 files changed, 40 insertions, 0 deletions
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 14fa09452f9f..a12255907852 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -3,6 +3,7 @@ #include <linux/io-64-nonatomic-lo-hi.h> #include <linux/security.h> #include <linux/debugfs.h> +#include <linux/ktime.h> #include <linux/mutex.h> #include <cxlmem.h> #include <cxl.h> @@ -1055,6 +1056,32 @@ int cxl_mem_create_range_info(struct cxl_dev_state *cxlds) } EXPORT_SYMBOL_NS_GPL(cxl_mem_create_range_info, CXL); +int cxl_set_timestamp(struct cxl_dev_state *cxlds) +{ + struct cxl_mbox_cmd mbox_cmd; + struct cxl_mbox_set_timestamp_in pi; + int rc; + + pi.timestamp = cpu_to_le64(ktime_get_real_ns()); + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_SET_TIMESTAMP, + .size_in = sizeof(pi), + .payload_in = &pi, + }; + + rc = cxl_internal_send_cmd(cxlds, &mbox_cmd); + /* + * Command is optional. Devices may have another way of providing + * a timestamp, or may return all 0s in timestamp fields. + * Don't report an error if this command isn't supported + */ + if (rc && (mbox_cmd.return_code != CXL_MBOX_CMD_RC_UNSUPPORTED)) + return rc; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL); + struct cxl_dev_state *cxl_dev_state_create(struct device *dev) { struct cxl_dev_state *cxlds; diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index f21692ccb7a2..802b5b396daf 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -309,6 +309,7 @@ enum cxl_opcode { CXL_MBOX_OP_SET_EVT_INT_POLICY = 0x0103, CXL_MBOX_OP_GET_FW_INFO = 0x0200, CXL_MBOX_OP_ACTIVATE_FW = 0x0202, + CXL_MBOX_OP_SET_TIMESTAMP = 0x0301, CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400, CXL_MBOX_OP_GET_LOG = 0x0401, CXL_MBOX_OP_IDENTIFY = 0x4000, @@ -537,6 +538,12 @@ struct cxl_mbox_set_partition_info { #define CXL_SET_PARTITION_IMMEDIATE_FLAG BIT(0) +/* Set Timestamp CXL 3.0 Spec 8.2.9.4.2 */ +struct cxl_mbox_set_timestamp_in { + __le64 timestamp; + +} __packed; + /** * struct cxl_mem_command - Driver representation of a memory device command * @info: Command information as it exists for the UAPI @@ -607,6 +614,8 @@ struct cxl_dev_state *cxl_dev_state_create(struct device *dev); void set_exclusive_cxl_commands(struct cxl_dev_state *cxlds, unsigned long *cmds); void clear_exclusive_cxl_commands(struct cxl_dev_state *cxlds, unsigned long *cmds); void cxl_mem_get_event_records(struct cxl_dev_state *cxlds, u32 status); +int cxl_set_timestamp(struct cxl_dev_state *cxlds); + #ifdef CONFIG_CXL_SUSPEND void cxl_mem_active_inc(void); void cxl_mem_active_dec(void); diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index d47005223c4f..ad2ebe7bfaeb 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -708,6 +708,10 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) return rc; + rc = cxl_set_timestamp(cxlds); + if (rc) + return rc; + rc = cxl_dev_state_identify(cxlds); if (rc) return rc; |