diff options
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 111 |
1 files changed, 105 insertions, 6 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 090acebba4fa..db12b6313afb 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -127,7 +127,7 @@ struct cxl_mbox_cmd { }; /* - * Per CXL 2.0 Section 8.2.8.4.5.1 + * Per CXL 3.0 Section 8.2.8.4.5.1 */ #define CMD_CMD_RC_TABLE \ C(SUCCESS, 0, NULL), \ @@ -145,14 +145,22 @@ struct cxl_mbox_cmd { 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, -ENXIO, "physical address specified is 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(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 @@ -215,6 +223,37 @@ struct cxl_event_state { 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 +}; + +/** + * 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 */ +}; + /** * struct cxl_dev_state - The driver device state * @@ -249,8 +288,8 @@ struct cxl_event_state { * @component_reg_phys: register base of component registers * @info: Cached DVSEC information about the device. * @serial: PCIe Device Serial Number - * @doe_mbs: PCI DOE mailbox array * @event: event log driver state + * @poison: poison driver state info * @mbox_send: @dev specific transport for transmitting mailbox commands * * See section 8.2.9.5.2 Capacity Configuration and Label Storage for @@ -287,9 +326,8 @@ struct cxl_dev_state { resource_size_t component_reg_phys; u64 serial; - struct xarray doe_mbs; - struct cxl_event_state event; + struct cxl_poison_state poison; int (*mbox_send)(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd); }; @@ -538,6 +576,61 @@ struct cxl_mbox_set_timestamp_in { } __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 @@ -608,6 +701,12 @@ 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); +int cxl_poison_state_init(struct cxl_dev_state *cxlds); +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); |