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linux/drivers/cxl/cxlmem.h
Dan Williams 7f946e6d83 Merge branch 'for-6.7/cxl-rch-eh' into cxl/next 
Restricted CXL Host (RCH) Error Handling undoes the topology munging of
CXL 1.1 to enabled some AER recovery, and lands some base infrastructure
for handling Root-Complex-Event-Collectors (RCECs) with CXL. Include
this long running series finally for v6.7.
2023-10-31 10:59:00 -07:00

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/* 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/cdev.h>
#include <linux/uuid.h>
#include <linux/rcuwait.h>
#include "cxl.h"
/* CXL 2.0 8.2.8.5.1.1 Memory Device Status Register */
#define CXLMDEV_STATUS_OFFSET 0x0
#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
*/
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;
};
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);
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.
* @payload_in: (input) Pointer to the input payload.
* @payload_out: (output) Pointer to the output payload. Must be allocated by
* the caller.
* @size_in: (input) Number of bytes to load from @payload_in.
* @size_out: (input) Max number of bytes loaded into @payload_out.
* (output) Number of bytes generated by the device. For fixed size
* 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
* @poll_count: (input) Number of timeouts to attempt.
* @poll_interval_ms: (input) Time between mailbox background command polling
* interval timeouts.
* @return_code: (output) Error code returned from hardware.
*
* This is the primary mechanism used to send commands to the hardware.
* All the fields except @payload_* correspond exactly to the fields described in
* Command Register section of the CXL 2.0 8.2.8.4.5. @payload_in and
* @payload_out are written to, and read from the Command Payload Registers
* defined in CXL 2.0 8.2.8.4.8.
*/
struct cxl_mbox_cmd {
u16 opcode;
void *payload_in;
void *payload_out;
size_t size_in;
size_t size_out;
size_t min_out;
int poll_count;
int poll_interval_ms;
u16 return_code;
};
/*
* 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, -ENXIO, "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 256MB - 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 = 0x00,
CXL_INT_MSI_MSIX = 0x01,
CXL_INT_FW = 0x02
};
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
* @lock: 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 lock; /* 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[0x78];
u8 data[];
} __packed;
#define CXL_FW_TRANSFER_ACTION_FULL 0x0
#define CXL_FW_TRANSFER_ACTION_INITIATE 0x1
#define CXL_FW_TRANSFER_ACTION_CONTINUE 0x2
#define CXL_FW_TRANSFER_ACTION_END 0x3
#define CXL_FW_TRANSFER_ACTION_ABORT 0x4
/*
* 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 0x0
#define CXL_FW_ACTIVATE_OFFLINE 0x1
/* 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_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
* @pmem_res: Active Persistent memory capacity configuration
* @ram_res: Active Volatile memory capacity configuration
* @serial: PCIe Device Serial Number
* @type: Generic Memory Class device or Vendor Specific Memory device
*/
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 resource pmem_res;
struct resource ram_res;
u64 serial;
enum cxl_devtype type;
};
/**
* 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
* @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.
* @exclusive_cmds: Commands that are kernel-internal only
* @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
* @next_volatile_bytes: volatile capacity change pending device reset
* @next_persistent_bytes: persistent capacity change pending device reset
* @event: event log driver state
* @poison: poison driver state info
* @security: security driver state info
* @fw: firmware upload / activation state
* @mbox_send: @dev specific transport for transmitting mailbox commands
*
* 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 payload_size;
size_t lsa_size;
struct mutex mbox_mutex; /* Protects device mailbox and firmware */
char firmware_version[0x10];
DECLARE_BITMAP(enabled_cmds, CXL_MEM_COMMAND_ID_MAX);
DECLARE_BITMAP(exclusive_cmds, CXL_MEM_COMMAND_ID_MAX);
u64 total_bytes;
u64 volatile_only_bytes;
u64 persistent_only_bytes;
u64 partition_align_bytes;
u64 active_volatile_bytes;
u64 active_persistent_bytes;
u64 next_volatile_bytes;
u64 next_persistent_bytes;
struct cxl_event_state event;
struct cxl_poison_state poison;
struct cxl_security_state security;
struct cxl_fw_state fw;
struct rcuwait mbox_wait;
int (*mbox_send)(struct cxl_memdev_state *mds,
struct cxl_mbox_cmd *cmd);
};
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 = 0x0000,
CXL_MBOX_OP_RAW = CXL_MBOX_OP_INVALID,
CXL_MBOX_OP_GET_EVENT_RECORD = 0x0100,
CXL_MBOX_OP_CLEAR_EVENT_RECORD = 0x0101,
CXL_MBOX_OP_GET_EVT_INT_POLICY = 0x0102,
CXL_MBOX_OP_SET_EVT_INT_POLICY = 0x0103,
CXL_MBOX_OP_GET_FW_INFO = 0x0200,
CXL_MBOX_OP_TRANSFER_FW = 0x0201,
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,
CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100,
CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101,
CXL_MBOX_OP_GET_LSA = 0x4102,
CXL_MBOX_OP_SET_LSA = 0x4103,
CXL_MBOX_OP_GET_HEALTH_INFO = 0x4200,
CXL_MBOX_OP_GET_ALERT_CONFIG = 0x4201,
CXL_MBOX_OP_SET_ALERT_CONFIG = 0x4202,
CXL_MBOX_OP_GET_SHUTDOWN_STATE = 0x4203,
CXL_MBOX_OP_SET_SHUTDOWN_STATE = 0x4204,
CXL_MBOX_OP_GET_POISON = 0x4300,
CXL_MBOX_OP_INJECT_POISON = 0x4301,
CXL_MBOX_OP_CLEAR_POISON = 0x4302,
CXL_MBOX_OP_GET_SCAN_MEDIA_CAPS = 0x4303,
CXL_MBOX_OP_SCAN_MEDIA = 0x4304,
CXL_MBOX_OP_GET_SCAN_MEDIA = 0x4305,
CXL_MBOX_OP_SANITIZE = 0x4400,
CXL_MBOX_OP_SECURE_ERASE = 0x4401,
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
};
#define DEFINE_CXL_CEL_UUID \
UUID_INIT(0xda9c0b5, 0xbf41, 0x4b78, 0x8f, 0x79, 0x96, 0xb1, 0x62, \
0x3b, 0x3f, 0x17)
#define DEFINE_CXL_VENDOR_DEBUG_UUID \
UUID_INIT(0xe1819d9, 0x11a9, 0x400c, 0x81, 0x1f, 0xd6, 0x07, 0x19, \
0x40, 0x3d, 0x86)
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[0x10];
__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;
/*
* Common Event Record Format
* CXL rev 3.0 section 8.2.9.2.1; Table 8-42
*/
struct cxl_event_record_hdr {
uuid_t id;
u8 length;
u8 flags[3];
__le16 handle;
__le16 related_handle;
__le64 timestamp;
u8 maint_op_class;
u8 reserved[15];
} __packed;
#define CXL_EVENT_RECORD_DATA_LENGTH 0x50
struct cxl_event_record_raw {
struct cxl_event_record_hdr hdr;
u8 data[CXL_EVENT_RECORD_DATA_LENGTH];
} __packed;
/*
* 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 = 0x00,
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
/*
* General Media Event Record
* CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
*/
#define CXL_EVENT_GEN_MED_COMP_ID_SIZE 0x10
struct cxl_event_gen_media {
struct cxl_event_record_hdr hdr;
__le64 phys_addr;
u8 descriptor;
u8 type;
u8 transaction_type;
u8 validity_flags[2];
u8 channel;
u8 rank;
u8 device[3];
u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE];
u8 reserved[46];
} __packed;
/*
* DRAM Event Record - DER
* CXL rev 3.0 section 8.2.9.2.1.2; Table 3-44
*/
#define CXL_EVENT_DER_CORRECTION_MASK_SIZE 0x20
struct cxl_event_dram {
struct cxl_event_record_hdr hdr;
__le64 phys_addr;
u8 descriptor;
u8 type;
u8 transaction_type;
u8 validity_flags[2];
u8 channel;
u8 rank;
u8 nibble_mask[3];
u8 bank_group;
u8 bank;
u8 row[3];
u8 column[2];
u8 correction_mask[CXL_EVENT_DER_CORRECTION_MASK_SIZE];
u8 reserved[0x17];
} __packed;
/*
* Get Health Info Record
* CXL rev 3.0 section 8.2.9.8.3.1; Table 8-100
*/
struct cxl_get_health_info {
u8 health_status;
u8 media_status;
u8 add_status;
u8 life_used;
u8 device_temp[2];
u8 dirty_shutdown_cnt[4];
u8 cor_vol_err_cnt[4];
u8 cor_per_err_cnt[4];
} __packed;
/*
* Memory Module Event Record
* CXL rev 3.0 section 8.2.9.2.1.3; Table 8-45
*/
struct cxl_event_mem_module {
struct cxl_event_record_hdr hdr;
u8 event_type;
struct cxl_get_health_info info;
u8 reserved[0x3d];
} __packed;
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)
/* 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 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_memdev_state *mds,
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_create_range_info(struct cxl_memdev_state *mds);
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);
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_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 {
struct cxl_component_regs regs;
unsigned int decoder_count;
unsigned int target_count;
unsigned int interleave_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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