/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright(c) 2020-2021 Intel Corporation. */
#ifndef __CXL_MEM_H__
#define __CXL_MEM_H__
#include <uapi/linux/cxl_mem.h>
#include <linux/pci.h>
#include <linux/cdev.h>
#include <linux/uuid.h>
#include <linux/node.h>
#include <cxl/event.h>
#include <cxl/mailbox.h>
#include "cxl.h"
/* CXL 2.0 8.2.8.5.1.1 Memory Device Status Register */
#define CXLMDEV_STATUS_OFFSET 0 x0
#define CXLMDEV_DEV_FATAL BIT(0 )
#define CXLMDEV_FW_HALT BIT(1 )
#define CXLMDEV_STATUS_MEDIA_STATUS_MASK GENMASK(3 , 2 )
#define CXLMDEV_MS_NOT_READY 0
#define CXLMDEV_MS_READY 1
#define CXLMDEV_MS_ERROR 2
#define CXLMDEV_MS_DISABLED 3
#define CXLMDEV_READY(status) \
(FIELD_GET(CXLMDEV_STATUS_MEDIA_STATUS_MASK, status) == \
CXLMDEV_MS_READY)
#define CXLMDEV_MBOX_IF_READY BIT(4 )
#define CXLMDEV_RESET_NEEDED_MASK GENMASK(7 , 5 )
#define CXLMDEV_RESET_NEEDED_NOT 0
#define CXLMDEV_RESET_NEEDED_COLD 1
#define CXLMDEV_RESET_NEEDED_WARM 2
#define CXLMDEV_RESET_NEEDED_HOT 3
#define CXLMDEV_RESET_NEEDED_CXL 4
#define CXLMDEV_RESET_NEEDED(status) \
(FIELD_GET(CXLMDEV_RESET_NEEDED_MASK, status) != \
CXLMDEV_RESET_NEEDED_NOT)
/**
* struct cxl_memdev - CXL bus object representing a Type - 3 Memory Device
* @ dev : driver core device object
* @ 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
* @ endpoint : connection to the CXL port topology for this memory device
* @ id : id number of this memdev instance .
* @ depth : endpoint port depth
* @ scrub_cycle : current scrub cycle set for this device
* @ scrub_region_id : id number of a backed region ( if any ) for which current scrub cycle set
* @ err_rec_array : List of xarrarys to store the memdev error records to
* check attributes for a memory repair operation are from
* current boot .
*/
struct cxl_memdev {
struct device dev;
struct cdev cdev;
struct cxl_dev_state *cxlds;
struct work_struct detach_work;
struct cxl_nvdimm_bridge *cxl_nvb;
struct cxl_nvdimm *cxl_nvd;
struct cxl_port *endpoint;
int id;
int depth;
u8 scrub_cycle;
int scrub_region_id;
void *err_rec_array;
};
static inline struct cxl_memdev *to_cxl_memdev(struct device *dev)
{
return container_of(dev, struct cxl_memdev, dev);
}
static inline struct cxl_port *cxled_to_port(struct cxl_endpoint_decoder *cxled)
{
return to_cxl_port(cxled->cxld.dev.parent);
}
static inline struct cxl_port *cxlrd_to_port(struct cxl_root_decoder *cxlrd)
{
return to_cxl_port(cxlrd->cxlsd.cxld.dev.parent);
}
static inline struct cxl_memdev *
cxled_to_memdev(struct cxl_endpoint_decoder *cxled)
{
struct cxl_port *port = to_cxl_port(cxled->cxld.dev.parent);
return to_cxl_memdev(port->uport_dev);
}
bool is_cxl_memdev(const struct device *dev);
static inline bool is_cxl_endpoint(struct cxl_port *port)
{
return is_cxl_memdev(port->uport_dev);
}
struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
struct cxl_dev_state *cxlds);
int devm_cxl_sanitize_setup_notifier(struct device *host,
struct cxl_memdev *cxlmd);
struct cxl_memdev_state;
int devm_cxl_setup_fw_upload(struct device *host, struct cxl_memdev_state *mds);
int devm_cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
resource_size_t base, resource_size_t len,
resource_size_t skipped);
#define CXL_NR_PARTITIONS_MAX 2
struct cxl_dpa_info {
u64 size;
struct cxl_dpa_part_info {
struct range range;
enum cxl_partition_mode mode;
} part[CXL_NR_PARTITIONS_MAX];
int nr_partitions;
};
int cxl_dpa_setup(struct cxl_dev_state *cxlds, const struct cxl_dpa_info *info);
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);
}
/*
* Per CXL 3 . 0 Section 8 . 2 . 8 . 4 . 5 . 1
*/
#define CMD_CMD_RC_TABLE \
C(SUCCESS, 0 , NULL), \
C(BACKGROUND, -ENXIO, "background cmd started successfully" ), \
C(INPUT, -ENXIO, "cmd input was invalid" ), \
C(UNSUPPORTED, -ENXIO, "cmd is not supported" ), \
C(INTERNAL, -ENXIO, "internal device error" ), \
C(RETRY, -ENXIO, "temporary error, retry once" ), \
C(BUSY, -ENXIO, "ongoing background operation" ), \
C(MEDIADISABLED, -ENXIO, "media access is disabled" ), \
C(FWINPROGRESS, -ENXIO, "one FW package can be transferred at a time" ), \
C(FWOOO, -ENXIO, "FW package content was transferred out of order" ), \
C(FWAUTH, -ENXIO, "FW package authentication failed" ), \
C(FWSLOT, -ENXIO, "FW slot is not supported for requested operation" ), \
C(FWROLLBACK, -ENXIO, "rolled back to the previous active FW" ), \
C(FWRESET, -ENXIO, "FW failed to activate, needs cold reset" ), \
C(HANDLE, -ENXIO, "one or more Event Record Handles were invalid" ), \
C(PADDR, -EFAULT, "physical address specified is invalid" ), \
C(POISONLMT, -EBUSY, "poison injection limit has been reached" ), \
C(MEDIAFAILURE, -ENXIO, "permanent issue with the media" ), \
C(ABORT, -ENXIO, "background cmd was aborted by device" ), \
C(SECURITY, -ENXIO, "not valid in the current security state" ), \
C(PASSPHRASE, -ENXIO, "phrase doesn't match current set passphrase" ), \
C(MBUNSUPPORTED, -ENXIO, "unsupported on the mailbox it was issued on" ),\
C(PAYLOADLEN, -ENXIO, "invalid payload length" ), \
C(LOG, -ENXIO, "invalid or unsupported log page" ), \
C(INTERRUPTED, -ENXIO, "asynchronous event occured" ), \
C(FEATUREVERSION, -ENXIO, "unsupported feature version" ), \
C(FEATURESELVALUE, -ENXIO, "unsupported feature selection value" ), \
C(FEATURETRANSFERIP, -ENXIO, "feature transfer in progress" ), \
C(FEATURETRANSFEROOO, -ENXIO, "feature transfer out of order" ), \
C(RESOURCEEXHAUSTED, -ENXIO, "resources are exhausted" ), \
C(EXTLIST, -ENXIO, "invalid Extent List" ), \
#undef C
#define C(a, b, c) CXL_MBOX_CMD_RC_## a
enum { CMD_CMD_RC_TABLE };
#undef C
#define C(a, b, c) { b, c }
struct cxl_mbox_cmd_rc {
int err;
const char *desc;
};
static const
struct cxl_mbox_cmd_rc cxl_mbox_cmd_rctable[] ={ CMD_CMD_RC_TABLE };
#undef C
static inline const char *cxl_mbox_cmd_rc2str(struct cxl_mbox_cmd *mbox_cmd)
{
return cxl_mbox_cmd_rctable[mbox_cmd->return_code].desc;
}
static inline int cxl_mbox_cmd_rc2errno(struct cxl_mbox_cmd *mbox_cmd)
{
return cxl_mbox_cmd_rctable[mbox_cmd->return_code].err;
}
/*
* CXL 2 . 0 - Memory capacity multiplier
* See Section 8 . 2 . 9 . 5
*
* Volatile , Persistent , and Partition capacities are specified to be in
* multiples of 256 MB - define a multiplier to convert to / from bytes .
*/
#define CXL_CAPACITY_MULTIPLIER SZ_256M
/*
* Event Interrupt Policy
*
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 4 ; Table 8 - 52
*/
enum cxl_event_int_mode {
CXL_INT_NONE = 0 x00,
CXL_INT_MSI_MSIX = 0 x01,
CXL_INT_FW = 0 x02
};
struct cxl_event_interrupt_policy {
u8 info_settings;
u8 warn_settings;
u8 failure_settings;
u8 fatal_settings;
} __packed;
/**
* struct cxl_event_state - Event log driver state
*
* @ buf : Buffer to receive event data
* @ log_lock : Serialize event_buf and log use
*/
struct cxl_event_state {
struct cxl_get_event_payload *buf;
struct mutex log_lock;
};
/* Device enabled poison commands */
enum poison_cmd_enabled_bits {
CXL_POISON_ENABLED_LIST,
CXL_POISON_ENABLED_INJECT,
CXL_POISON_ENABLED_CLEAR,
CXL_POISON_ENABLED_SCAN_CAPS,
CXL_POISON_ENABLED_SCAN_MEDIA,
CXL_POISON_ENABLED_SCAN_RESULTS,
CXL_POISON_ENABLED_MAX
};
/* Device enabled security commands */
enum security_cmd_enabled_bits {
CXL_SEC_ENABLED_SANITIZE,
CXL_SEC_ENABLED_SECURE_ERASE,
CXL_SEC_ENABLED_GET_SECURITY_STATE,
CXL_SEC_ENABLED_SET_PASSPHRASE,
CXL_SEC_ENABLED_DISABLE_PASSPHRASE,
CXL_SEC_ENABLED_UNLOCK,
CXL_SEC_ENABLED_FREEZE_SECURITY,
CXL_SEC_ENABLED_PASSPHRASE_SECURE_ERASE,
CXL_SEC_ENABLED_MAX
};
/**
* struct cxl_poison_state - Driver poison state info
*
* @ max_errors : Maximum media error records held in device cache
* @ enabled_cmds : All poison commands enabled in the CEL
* @ list_out : The poison list payload returned by device
* @ mutex : Protect reads of the poison list
*
* Reads of the poison list are synchronized to ensure that a reader
* does not get an incomplete list because their request overlapped
* ( was interrupted or preceded by ) another read request of the same
* DPA range . CXL Spec 3 . 0 Section 8 . 2 . 9 . 8 . 4 . 1
*/
struct cxl_poison_state {
u32 max_errors;
DECLARE_BITMAP(enabled_cmds, CXL_POISON_ENABLED_MAX);
struct cxl_mbox_poison_out *list_out;
struct mutex mutex; /* Protect reads of poison list */
};
/*
* Get FW Info
* CXL rev 3 . 0 section 8 . 2 . 9 . 3 . 1 ; Table 8 - 56
*/
struct cxl_mbox_get_fw_info {
u8 num_slots;
u8 slot_info;
u8 activation_cap;
u8 reserved[13 ];
char slot_1_revision[16 ];
char slot_2_revision[16 ];
char slot_3_revision[16 ];
char slot_4_revision[16 ];
} __packed;
#define CXL_FW_INFO_SLOT_INFO_CUR_MASK GENMASK(2 , 0 )
#define CXL_FW_INFO_SLOT_INFO_NEXT_MASK GENMASK(5 , 3 )
#define CXL_FW_INFO_SLOT_INFO_NEXT_SHIFT 3
#define CXL_FW_INFO_ACTIVATION_CAP_HAS_LIVE_ACTIVATE BIT(0 )
/*
* Transfer FW Input Payload
* CXL rev 3 . 0 section 8 . 2 . 9 . 3 . 2 ; Table 8 - 57
*/
struct cxl_mbox_transfer_fw {
u8 action;
u8 slot;
u8 reserved[2 ];
__le32 offset;
u8 reserved2[0 x78];
u8 data[];
} __packed;
#define CXL_FW_TRANSFER_ACTION_FULL 0 x0
#define CXL_FW_TRANSFER_ACTION_INITIATE 0 x1
#define CXL_FW_TRANSFER_ACTION_CONTINUE 0 x2
#define CXL_FW_TRANSFER_ACTION_END 0 x3
#define CXL_FW_TRANSFER_ACTION_ABORT 0 x4
/*
* CXL rev 3 . 0 section 8 . 2 . 9 . 3 . 2 mandates 128 - byte alignment for FW packages
* and for each part transferred in a Transfer FW command .
*/
#define CXL_FW_TRANSFER_ALIGNMENT 128
/*
* Activate FW Input Payload
* CXL rev 3 . 0 section 8 . 2 . 9 . 3 . 3 ; Table 8 - 58
*/
struct cxl_mbox_activate_fw {
u8 action;
u8 slot;
} __packed;
#define CXL_FW_ACTIVATE_ONLINE 0 x0
#define CXL_FW_ACTIVATE_OFFLINE 0 x1
/* FW state bits */
#define CXL_FW_STATE_BITS 32
#define CXL_FW_CANCEL 0
/**
* struct cxl_fw_state - Firmware upload / activation state
*
* @ state : fw_uploader state bitmask
* @ oneshot : whether the fw upload fits in a single transfer
* @ num_slots : Number of FW slots available
* @ cur_slot : Slot number currently active
* @ next_slot : Slot number for the new firmware
*/
struct cxl_fw_state {
DECLARE_BITMAP(state, CXL_FW_STATE_BITS);
bool oneshot;
int num_slots;
int cur_slot;
int next_slot;
};
/**
* struct cxl_security_state - Device security state
*
* @ state : state of last security operation
* @ enabled_cmds : All security commands enabled in the CEL
* @ poll_tmo_secs : polling timeout
* @ sanitize_active : sanitize completion pending
* @ poll_dwork : polling work item
* @ sanitize_node : sanitation sysfs file to notify
*/
struct cxl_security_state {
unsigned long state;
DECLARE_BITMAP(enabled_cmds, CXL_SEC_ENABLED_MAX);
int poll_tmo_secs;
bool sanitize_active;
struct delayed_work poll_dwork;
struct kernfs_node *sanitize_node;
};
/*
* enum cxl_devtype - delineate type - 2 from a generic type - 3 device
* @ CXL_DEVTYPE_DEVMEM - Vendor specific CXL Type - 2 device implementing HDM - D or
* HDM - DB , no requirement that this device implements a
* mailbox , or other memory - device - standard manageability
* flows .
* @ CXL_DEVTYPE_CLASSMEM - Common class definition of a CXL Type - 3 device with
* HDM - H and class - mandatory memory device registers
*/
enum cxl_devtype {
CXL_DEVTYPE_DEVMEM,
CXL_DEVTYPE_CLASSMEM,
};
/**
* struct cxl_dpa_perf - DPA performance property entry
* @ dpa_range : range for DPA address
* @ coord : QoS performance data ( i . e . latency , bandwidth )
* @ cdat_coord : raw QoS performance data from CDAT
* @ qos_class : QoS Class cookies
*/
struct cxl_dpa_perf {
struct range dpa_range;
struct access_coordinate coord[ACCESS_COORDINATE_MAX];
struct access_coordinate cdat_coord[ACCESS_COORDINATE_MAX];
int qos_class;
};
/**
* struct cxl_dpa_partition - DPA partition descriptor
* @ res : shortcut to the partition in the DPA resource tree ( cxlds - > dpa_res )
* @ perf : performance attributes of the partition from CDAT
* @ mode : operation mode for the DPA capacity , e . g . ram , pmem , dynamic . . .
*/
struct cxl_dpa_partition {
struct resource res;
struct cxl_dpa_perf perf;
enum cxl_partition_mode mode;
};
/**
* struct cxl_dev_state - The driver device state
*
* cxl_dev_state represents the CXL driver / device state . It provides an
* interface to mailbox commands as well as some cached data about the device .
* Currently only memory devices are represented .
*
* @ dev : The device associated with this CXL state
* @ cxlmd : The device representing the CXL . mem capabilities of @ dev
* @ reg_map : component and ras register mapping parameters
* @ 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 )
* @ media_ready : Indicate whether the device media is usable
* @ dpa_res : Overall DPA resource tree for the device
* @ part : DPA partition array
* @ nr_partitions : Number of DPA partitions
* @ serial : PCIe Device Serial Number
* @ type : Generic Memory Class device or Vendor Specific Memory device
* @ cxl_mbox : CXL mailbox context
* @ cxlfs : CXL features context
*/
struct cxl_dev_state {
struct device *dev;
struct cxl_memdev *cxlmd;
struct cxl_register_map reg_map;
struct cxl_regs regs;
int cxl_dvsec;
bool rcd;
bool media_ready;
struct resource dpa_res;
struct cxl_dpa_partition part[CXL_NR_PARTITIONS_MAX];
unsigned int nr_partitions;
u64 serial;
enum cxl_devtype type;
struct cxl_mailbox cxl_mbox;
#ifdef CONFIG_CXL_FEATURES
struct cxl_features_state *cxlfs;
#endif
};
static inline resource_size_t cxl_pmem_size(struct cxl_dev_state *cxlds)
{
/*
* Static PMEM may be at partition index 0 when there is no static RAM
* capacity .
*/
for (int i = 0 ; i < cxlds->nr_partitions; i++)
if (cxlds->part[i].mode == CXL_PARTMODE_PMEM)
return resource_size(&cxlds->part[i].res);
return 0 ;
}
static inline struct cxl_dev_state *mbox_to_cxlds(struct cxl_mailbox *cxl_mbox)
{
return dev_get_drvdata(cxl_mbox->host);
}
/**
* struct cxl_memdev_state - Generic Type - 3 Memory Device Class driver data
*
* CXL 8 . 1 . 12 . 1 PCI Header - Class Code Register Memory Device defines
* common memory device functionality like the presence of a mailbox and
* the functionality related to that like Identify Memory Device and Get
* Partition Info
* @ cxlds : Core driver state common across Type - 2 and Type - 3 devices
* @ lsa_size : Size of Label Storage Area
* ( CXL 2 . 0 8 . 2 . 9 . 5 . 1 . 1 Identify Memory Device )
* @ firmware_version : Firmware version for the memory device .
* @ total_bytes : sum of all possible capacities
* @ volatile_only_bytes : hard volatile capacity
* @ persistent_only_bytes : hard persistent capacity
* @ partition_align_bytes : alignment size for partition - able capacity
* @ active_volatile_bytes : sum of hard + soft volatile
* @ active_persistent_bytes : sum of hard + soft persistent
* @ event : event log driver state
* @ poison : poison driver state info
* @ security : security driver state info
* @ fw : firmware upload / activation state
* @ mce_notifier : MCE notifier
*
* See CXL 3 . 0 8 . 2 . 9 . 8 . 2 Capacity Configuration and Label Storage for
* details on capacity parameters .
*/
struct cxl_memdev_state {
struct cxl_dev_state cxlds;
size_t lsa_size;
char firmware_version[0 x10];
u64 total_bytes;
u64 volatile_only_bytes;
u64 persistent_only_bytes;
u64 partition_align_bytes;
u64 active_volatile_bytes;
u64 active_persistent_bytes;
struct cxl_event_state event;
struct cxl_poison_state poison;
struct cxl_security_state security;
struct cxl_fw_state fw;
struct notifier_block mce_notifier;
};
static inline struct cxl_memdev_state *
to_cxl_memdev_state(struct cxl_dev_state *cxlds)
{
if (cxlds->type != CXL_DEVTYPE_CLASSMEM)
return NULL;
return container_of(cxlds, struct cxl_memdev_state, cxlds);
}
enum cxl_opcode {
CXL_MBOX_OP_INVALID = 0 x0000,
CXL_MBOX_OP_RAW = CXL_MBOX_OP_INVALID,
CXL_MBOX_OP_GET_EVENT_RECORD = 0 x0100,
CXL_MBOX_OP_CLEAR_EVENT_RECORD = 0 x0101,
CXL_MBOX_OP_GET_EVT_INT_POLICY = 0 x0102,
CXL_MBOX_OP_SET_EVT_INT_POLICY = 0 x0103,
CXL_MBOX_OP_GET_FW_INFO = 0 x0200,
CXL_MBOX_OP_TRANSFER_FW = 0 x0201,
CXL_MBOX_OP_ACTIVATE_FW = 0 x0202,
CXL_MBOX_OP_GET_TIMESTAMP = 0 x0300,
CXL_MBOX_OP_SET_TIMESTAMP = 0 x0301,
CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0 x0400,
CXL_MBOX_OP_GET_LOG = 0 x0401,
CXL_MBOX_OP_GET_LOG_CAPS = 0 x0402,
CXL_MBOX_OP_CLEAR_LOG = 0 x0403,
CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0 x0405,
CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0 x0500,
CXL_MBOX_OP_GET_FEATURE = 0 x0501,
CXL_MBOX_OP_SET_FEATURE = 0 x0502,
CXL_MBOX_OP_DO_MAINTENANCE = 0 x0600,
CXL_MBOX_OP_IDENTIFY = 0 x4000,
CXL_MBOX_OP_GET_PARTITION_INFO = 0 x4100,
CXL_MBOX_OP_SET_PARTITION_INFO = 0 x4101,
CXL_MBOX_OP_GET_LSA = 0 x4102,
CXL_MBOX_OP_SET_LSA = 0 x4103,
CXL_MBOX_OP_GET_HEALTH_INFO = 0 x4200,
CXL_MBOX_OP_GET_ALERT_CONFIG = 0 x4201,
CXL_MBOX_OP_SET_ALERT_CONFIG = 0 x4202,
CXL_MBOX_OP_GET_SHUTDOWN_STATE = 0 x4203,
CXL_MBOX_OP_SET_SHUTDOWN_STATE = 0 x4204,
CXL_MBOX_OP_GET_POISON = 0 x4300,
CXL_MBOX_OP_INJECT_POISON = 0 x4301,
CXL_MBOX_OP_CLEAR_POISON = 0 x4302,
CXL_MBOX_OP_GET_SCAN_MEDIA_CAPS = 0 x4303,
CXL_MBOX_OP_SCAN_MEDIA = 0 x4304,
CXL_MBOX_OP_GET_SCAN_MEDIA = 0 x4305,
CXL_MBOX_OP_SANITIZE = 0 x4400,
CXL_MBOX_OP_SECURE_ERASE = 0 x4401,
CXL_MBOX_OP_GET_SECURITY_STATE = 0 x4500,
CXL_MBOX_OP_SET_PASSPHRASE = 0 x4501,
CXL_MBOX_OP_DISABLE_PASSPHRASE = 0 x4502,
CXL_MBOX_OP_UNLOCK = 0 x4503,
CXL_MBOX_OP_FREEZE_SECURITY = 0 x4504,
CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE = 0 x4505,
CXL_MBOX_OP_MAX = 0 x10000
};
#define DEFINE_CXL_CEL_UUID \
UUID_INIT(0 xda9c0b5, 0 xbf41, 0 x4b78, 0 x8f, 0 x79, 0 x96, 0 xb1, 0 x62, \
0 x3b, 0 x3f, 0 x17)
#define DEFINE_CXL_VENDOR_DEBUG_UUID \
UUID_INIT(0 x5e1819d9, 0 x11a9, 0 x400c, 0 x81, 0 x1f, 0 xd6, 0 x07, 0 x19, \
0 x40, 0 x3d, 0 x86)
struct cxl_mbox_get_supported_logs {
__le16 entries;
u8 rsvd[6 ];
struct cxl_gsl_entry {
uuid_t uuid;
__le32 size;
} __packed entry[];
} __packed;
struct cxl_cel_entry {
__le16 opcode;
__le16 effect;
} __packed;
struct cxl_mbox_get_log {
uuid_t uuid;
__le32 offset;
__le32 length;
} __packed;
/* See CXL 2.0 Table 175 Identify Memory Device Output Payload */
struct cxl_mbox_identify {
char fw_revision[0 x10];
__le64 total_capacity;
__le64 volatile_capacity;
__le64 persistent_capacity;
__le64 partition_align;
__le16 info_event_log_size;
__le16 warning_event_log_size;
__le16 failure_event_log_size;
__le16 fatal_event_log_size;
__le32 lsa_size;
u8 poison_list_max_mer[3 ];
__le16 inject_poison_limit;
u8 poison_caps;
u8 qos_telemetry_caps;
} __packed;
/*
* General Media Event Record UUID
* CXL rev 3 . 0 Section 8 . 2 . 9 . 2 . 1 . 1 ; Table 8 - 43
*/
#define CXL_EVENT_GEN_MEDIA_UUID \
UUID_INIT(0 xfbcd0a77, 0 xc260, 0 x417f, 0 x85, 0 xa9, 0 x08, 0 x8b, 0 x16, \
0 x21, 0 xeb, 0 xa6)
/*
* DRAM Event Record UUID
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 1 . 2 ; Table 8 - 44
*/
#define CXL_EVENT_DRAM_UUID \
UUID_INIT(0 x601dcbb3, 0 x9c06, 0 x4eab, 0 xb8, 0 xaf, 0 x4e, 0 x9b, 0 xfb, \
0 x5c, 0 x96, 0 x24)
/*
* Memory Module Event Record UUID
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 1 . 3 ; Table 8 - 45
*/
#define CXL_EVENT_MEM_MODULE_UUID \
UUID_INIT(0 xfe927475, 0 xdd59, 0 x4339, 0 xa5, 0 x86, 0 x79, 0 xba, 0 xb1, \
0 x13, 0 xb7, 0 x74)
/*
* Memory Sparing Event Record UUID
* CXL rev 3 . 2 section 8 . 2 . 10 . 2 . 1 . 4 : Table 8 - 60
*/
#define CXL_EVENT_MEM_SPARING_UUID \
UUID_INIT(0 xe71f3a40, 0 x2d29, 0 x4092, 0 x8a, 0 x39, 0 x4d, 0 x1c, 0 x96, \
0 x6c, 0 x7c, 0 x65)
/*
* Get Event Records output payload
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 2 ; Table 8 - 50
*/
#define CXL_GET_EVENT_FLAG_OVERFLOW BIT(0 )
#define CXL_GET_EVENT_FLAG_MORE_RECORDS BIT(1 )
struct cxl_get_event_payload {
u8 flags;
u8 reserved1;
__le16 overflow_err_count;
__le64 first_overflow_timestamp;
__le64 last_overflow_timestamp;
__le16 record_count;
u8 reserved2[10 ];
struct cxl_event_record_raw records[];
} __packed;
/*
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 2 ; Table 8 - 49
*/
enum cxl_event_log_type {
CXL_EVENT_TYPE_INFO = 0 x00,
CXL_EVENT_TYPE_WARN,
CXL_EVENT_TYPE_FAIL,
CXL_EVENT_TYPE_FATAL,
CXL_EVENT_TYPE_MAX
};
/*
* Clear Event Records input payload
* CXL rev 3 . 0 section 8 . 2 . 9 . 2 . 3 ; Table 8 - 51
*/
struct cxl_mbox_clear_event_payload {
u8 event_log; /* enum cxl_event_log_type */
u8 clear_flags;
u8 nr_recs;
u8 reserved[3 ];
__le16 handles[];
} __packed;
#define CXL_CLEAR_EVENT_MAX_HANDLES U8_MAX
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
__le64 next_volatile_cap;
__le64 next_persistent_cap;
} __packed;
struct cxl_mbox_get_lsa {
__le32 offset;
__le32 length;
} __packed;
struct cxl_mbox_set_lsa {
__le32 offset;
__le32 reserved;
u8 data[];
} __packed;
struct cxl_mbox_set_partition_info {
__le64 volatile_capacity;
u8 flags;
} __packed;
#define CXL_SET_PARTITION_IMMEDIATE_FLAG BIT(0 )
/* Get Health Info Output Payload CXL 3.2 Spec 8.2.10.9.3.1 Table 8-148 */
struct cxl_mbox_get_health_info_out {
u8 health_status;
u8 media_status;
u8 additional_status;
u8 life_used;
__le16 device_temperature;
__le32 dirty_shutdown_cnt;
__le32 corrected_volatile_error_cnt;
__le32 corrected_persistent_error_cnt;
} __packed;
/* Set Shutdown State Input Payload CXL 3.2 Spec 8.2.10.9.3.5 Table 8-152 */
struct cxl_mbox_set_shutdown_state_in {
u8 state;
} __packed;
/* Set Timestamp CXL 3.0 Spec 8.2.9.4.2 */
struct cxl_mbox_set_timestamp_in {
__le64 timestamp;
} __packed;
/* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */
struct cxl_mbox_poison_in {
__le64 offset;
__le64 length;
} __packed;
struct cxl_mbox_poison_out {
u8 flags;
u8 rsvd1;
__le64 overflow_ts;
__le16 count;
u8 rsvd2[20 ];
struct cxl_poison_record {
__le64 address;
__le32 length;
__le32 rsvd;
} __packed record[];
} __packed;
/*
* Get Poison List address field encodes the starting
* address of poison , and the source of the poison .
*/
#define CXL_POISON_START_MASK GENMASK_ULL(63 , 6 )
#define CXL_POISON_SOURCE_MASK GENMASK(2 , 0 )
/* Get Poison List record length is in units of 64 bytes */
#define CXL_POISON_LEN_MULT 64
/* Kernel defined maximum for a list of poison errors */
#define CXL_POISON_LIST_MAX 1024
/* Get Poison List: Payload out flags */
#define CXL_POISON_FLAG_MORE BIT(0 )
#define CXL_POISON_FLAG_OVERFLOW BIT(1 )
#define CXL_POISON_FLAG_SCANNING BIT(2 )
/* Get Poison List: Poison Source */
#define CXL_POISON_SOURCE_UNKNOWN 0
#define CXL_POISON_SOURCE_EXTERNAL 1
#define CXL_POISON_SOURCE_INTERNAL 2
#define CXL_POISON_SOURCE_INJECTED 3
#define CXL_POISON_SOURCE_VENDOR 7
/* Inject & Clear Poison CXL 3.0 Spec 8.2.9.8.4.2/3 */
struct cxl_mbox_inject_poison {
__le64 address;
};
/* Clear Poison CXL 3.0 Spec 8.2.9.8.4.3 */
struct cxl_mbox_clear_poison {
__le64 address;
u8 write_data[CXL_POISON_LEN_MULT];
} __packed;
/**
* struct cxl_mem_command - Driver representation of a memory device command
* @ info : Command information as it exists for the UAPI
* @ opcode : The actual bits used for the mailbox protocol
* @ flags : Set of flags effecting driver behavior .
*
* * % CXL_CMD_FLAG_FORCE_ENABLE : In cases of error , commands with this flag
* will be enabled by the driver regardless of what hardware may have
* advertised .
*
* The cxl_mem_command is the driver ' s internal representation of commands that
* are supported by the driver . Some of these commands may not be supported by
* the hardware . The driver will use @ info to validate the fields passed in by
* the user then submit the @ opcode to the hardware .
*
* See struct cxl_command_info .
*/
struct cxl_mem_command {
struct cxl_command_info info;
enum cxl_opcode opcode;
u32 flags;
#define CXL_CMD_FLAG_FORCE_ENABLE BIT(0 )
};
#define CXL_PMEM_SEC_STATE_USER_PASS_SET 0 x01
#define CXL_PMEM_SEC_STATE_MASTER_PASS_SET 0 x02
#define CXL_PMEM_SEC_STATE_LOCKED 0 x04
#define CXL_PMEM_SEC_STATE_FROZEN 0 x08
#define CXL_PMEM_SEC_STATE_USER_PLIMIT 0 x10
#define CXL_PMEM_SEC_STATE_MASTER_PLIMIT 0 x20
/* 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_mailbox *cxl_mbox,
struct cxl_mbox_cmd *cmd);
int cxl_dev_state_identify(struct cxl_memdev_state *mds);
int cxl_await_media_ready(struct cxl_dev_state *cxlds);
int cxl_enumerate_cmds(struct cxl_memdev_state *mds);
int cxl_mem_dpa_fetch(struct cxl_memdev_state *mds, struct cxl_dpa_info *info);
struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev);
void set_exclusive_cxl_commands(struct cxl_memdev_state *mds,
unsigned long *cmds);
void clear_exclusive_cxl_commands(struct cxl_memdev_state *mds,
unsigned long *cmds);
void cxl_mem_get_event_records(struct cxl_memdev_state *mds, u32 status);
void cxl_event_trace_record(const struct cxl_memdev *cxlmd,
enum cxl_event_log_type type,
enum cxl_event_type event_type,
const uuid_t *uuid, union cxl_event *evt);
int cxl_get_dirty_count(struct cxl_memdev_state *mds, u32 *count);
int cxl_arm_dirty_shutdown(struct cxl_memdev_state *mds);
int cxl_set_timestamp(struct cxl_memdev_state *mds);
int cxl_poison_state_init(struct cxl_memdev_state *mds);
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr);
int cxl_trigger_poison_list(struct cxl_memdev *cxlmd);
int cxl_inject_poison(struct cxl_memdev *cxlmd, u64 dpa);
int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa);
#ifdef CONFIG_CXL_EDAC_MEM_FEATURES
int devm_cxl_memdev_edac_register(struct cxl_memdev *cxlmd);
int devm_cxl_region_edac_register(struct cxl_region *cxlr);
int cxl_store_rec_gen_media(struct cxl_memdev *cxlmd, union cxl_event *evt);
int cxl_store_rec_dram(struct cxl_memdev *cxlmd, union cxl_event *evt);
void devm_cxl_memdev_edac_release(struct cxl_memdev *cxlmd);
#else
static inline int devm_cxl_memdev_edac_register(struct cxl_memdev *cxlmd)
{ return 0 ; }
static inline int devm_cxl_region_edac_register(struct cxl_region *cxlr)
{ return 0 ; }
static inline int cxl_store_rec_gen_media(struct cxl_memdev *cxlmd,
union cxl_event *evt)
{ return 0 ; }
static inline int cxl_store_rec_dram(struct cxl_memdev *cxlmd,
union cxl_event *evt)
{ return 0 ; }
static inline void devm_cxl_memdev_edac_release(struct cxl_memdev *cxlmd)
{ return ; }
#endif
#ifdef CONFIG_CXL_SUSPEND
void cxl_mem_active_inc(void );
void cxl_mem_active_dec(void );
#else
static inline void cxl_mem_active_inc(void )
{
}
static inline void cxl_mem_active_dec(void )
{
}
#endif
int cxl_mem_sanitize(struct cxl_memdev *cxlmd, u16 cmd);
/**
* struct cxl_hdm - HDM Decoder registers and cached / decoded capabilities
* @ regs : mapped registers , see devm_cxl_setup_hdm ( )
* @ decoder_count : number of decoders for this port
* @ target_count : for switch decoders , max downstream port targets
* @ interleave_mask : interleave granularity capability , see check_interleave_cap ( )
* @ iw_cap_mask : bitmask of supported interleave ways , see check_interleave_cap ( )
* @ port : mapped cxl_port , see devm_cxl_setup_hdm ( )
*/
struct cxl_hdm {
struct cxl_component_regs regs;
unsigned int decoder_count;
unsigned int target_count;
unsigned int interleave_mask;
unsigned long iw_cap_mask;
struct cxl_port *port;
};
struct seq_file;
struct dentry *cxl_debugfs_create_dir(const char *dir);
void cxl_dpa_debug(struct seq_file *file, struct cxl_dev_state *cxlds);
#endif /* __CXL_MEM_H__ */
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