diff options
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 64 |
1 files changed, 62 insertions, 2 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 88e3a8e54b6a..ab138004f644 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -35,6 +35,8 @@ * @cdev: char dev core object for ioctl operations * @cxlds: The device state backing this device * @detach_work: active memdev lost a port in its ancestry + * @cxl_nvb: coordinate removal of @cxl_nvd if present + * @cxl_nvd: optional bridge to an nvdimm if the device supports pmem * @id: id number of this memdev instance. */ struct cxl_memdev { @@ -42,6 +44,8 @@ struct cxl_memdev { struct cdev cdev; struct cxl_dev_state *cxlds; struct work_struct detach_work; + struct cxl_nvdimm_bridge *cxl_nvb; + struct cxl_nvdimm *cxl_nvd; int id; }; @@ -76,6 +80,15 @@ static inline bool is_cxl_endpoint(struct cxl_port *port) struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds); +static inline struct cxl_ep *cxl_ep_load(struct cxl_port *port, + struct cxl_memdev *cxlmd) +{ + if (!port) + return NULL; + + return xa_load(&port->endpoints, (unsigned long)&cxlmd->dev); +} + /** * struct cxl_mbox_cmd - A command to be submitted to hardware. * @opcode: (input) The command set and command submitted to hardware. @@ -88,6 +101,7 @@ struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds); * outputs commands this is always expected to be deterministic. For * variable sized output commands, it tells the exact number of bytes * written. + * @min_out: (input) internal command output payload size validation * @return_code: (output) Error code returned from hardware. * * This is the primary mechanism used to send commands to the hardware. @@ -102,6 +116,7 @@ struct cxl_mbox_cmd { void *payload_out; size_t size_in; size_t size_out; + size_t min_out; u16 return_code; }; @@ -186,8 +201,10 @@ 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 + * @rcd: operating in RCD mode (CXL 3.0 9.11.8 CXL Devices Attached to an RCH) * @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 @@ -218,10 +235,12 @@ struct cxl_endpoint_dvsec_info { */ struct cxl_dev_state { struct device *dev; + struct cxl_memdev *cxlmd; struct cxl_regs regs; int cxl_dvsec; + bool rcd; size_t payload_size; size_t lsa_size; struct mutex mbox_mutex; /* Protects device mailbox and firmware */ @@ -273,6 +292,12 @@ 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_GET_SECURITY_STATE = 0x4500, + CXL_MBOX_OP_SET_PASSPHRASE = 0x4501, + CXL_MBOX_OP_DISABLE_PASSPHRASE = 0x4502, + CXL_MBOX_OP_UNLOCK = 0x4503, + CXL_MBOX_OP_FREEZE_SECURITY = 0x4504, + CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE = 0x4505, CXL_MBOX_OP_MAX = 0x10000 }; @@ -372,8 +397,43 @@ struct cxl_mem_command { #define CXL_CMD_FLAG_FORCE_ENABLE BIT(0) }; -int cxl_mbox_send_cmd(struct cxl_dev_state *cxlds, u16 opcode, void *in, - size_t in_size, void *out, size_t out_size); +#define CXL_PMEM_SEC_STATE_USER_PASS_SET 0x01 +#define CXL_PMEM_SEC_STATE_MASTER_PASS_SET 0x02 +#define CXL_PMEM_SEC_STATE_LOCKED 0x04 +#define CXL_PMEM_SEC_STATE_FROZEN 0x08 +#define CXL_PMEM_SEC_STATE_USER_PLIMIT 0x10 +#define CXL_PMEM_SEC_STATE_MASTER_PLIMIT 0x20 + +/* set passphrase input payload */ +struct cxl_set_pass { + u8 type; + u8 reserved[31]; + /* CXL field using NVDIMM define, same length */ + u8 old_pass[NVDIMM_PASSPHRASE_LEN]; + u8 new_pass[NVDIMM_PASSPHRASE_LEN]; +} __packed; + +/* disable passphrase input payload */ +struct cxl_disable_pass { + u8 type; + u8 reserved[31]; + u8 pass[NVDIMM_PASSPHRASE_LEN]; +} __packed; + +/* passphrase secure erase payload */ +struct cxl_pass_erase { + u8 type; + u8 reserved[31]; + u8 pass[NVDIMM_PASSPHRASE_LEN]; +} __packed; + +enum { + CXL_PMEM_SEC_PASS_MASTER = 0, + CXL_PMEM_SEC_PASS_USER, +}; + +int cxl_internal_send_cmd(struct cxl_dev_state *cxlds, + struct cxl_mbox_cmd *cmd); int cxl_dev_state_identify(struct cxl_dev_state *cxlds); int cxl_await_media_ready(struct cxl_dev_state *cxlds); int cxl_enumerate_cmds(struct cxl_dev_state *cxlds); |