From: Alison Schofield <[email protected]> Users may want the ability to change the partition layout of a CXL memory device.
Add interfaces to libcxl to allocate and send a SET_PARTITION_INFO mailbox as defined in the CXL 2.0 specification. Signed-off-by: Alison Schofield <[email protected]> --- cxl/lib/libcxl.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++ cxl/lib/libcxl.sym | 5 +++++ cxl/lib/private.h | 8 ++++++++ cxl/libcxl.h | 5 +++++ 4 files changed, 68 insertions(+) diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index 823bcb0..30c8f23 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -1230,6 +1230,21 @@ cxl_cmd_partition_info_get_next_persistent_bytes(struct cxl_cmd *cmd) cmd_partition_get_capacity_field(cmd, next_persistent_cap); } +CXL_EXPORT struct cxl_cmd *cxl_cmd_new_set_partition_info(struct cxl_memdev *memdev, + unsigned long long volatile_capacity, int flags) +{ + struct cxl_cmd_set_partition_info *set_partition; + struct cxl_cmd *cmd; + + cmd = cxl_cmd_new_generic(memdev, + CXL_MEM_COMMAND_ID_SET_PARTITION_INFO); + + set_partition = (struct cxl_cmd_set_partition_info *)cmd->send_cmd->in.payload; + set_partition->volatile_capacity = cpu_to_le64(volatile_capacity); + set_partition->flags = flags; + return cmd; +} + CXL_EXPORT int cxl_cmd_submit(struct cxl_cmd *cmd) { struct cxl_memdev *memdev = cmd->memdev; @@ -1428,3 +1443,38 @@ CXL_EXPORT int cxl_memdev_read_label(struct cxl_memdev *memdev, void *buf, { return lsa_op(memdev, LSA_OP_GET, buf, length, offset); } + +CXL_EXPORT int cxl_memdev_set_partition_info(struct cxl_memdev *memdev, + unsigned long long volatile_capacity, int flags) +{ + struct cxl_ctx *ctx = cxl_memdev_get_ctx(memdev); + struct cxl_cmd *cmd; + int rc; + + dbg(ctx, "%s: enter cap: %llx, flags %d\n", __func__, + volatile_capacity, flags); + + cmd = cxl_cmd_new_set_partition_info(memdev, + volatile_capacity / CXL_CAPACITY_MULTIPLIER, flags); + if (!cmd) + return -ENXIO; + + rc = cxl_cmd_submit(cmd); + if (rc < 0) { + err(ctx, "cmd submission failed: %s\n", strerror(-rc)); + goto err; + } + rc = cxl_cmd_get_mbox_status(cmd); + if (rc != 0) { + err(ctx, "%s: mbox status: %d\n", __func__, rc); + rc = -ENXIO; + } +err: + cxl_cmd_unref(cmd); + return rc; +} + +CXL_EXPORT int cxl_cmd_partition_info_flag_immediate(void) +{ + return CXL_CMD_SET_PARTITION_INFO_FLAG_IMMEDIATE; +} diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index 1e2cf05..d5a0f5b 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -78,6 +78,11 @@ global: cxl_cmd_partition_info_get_active_persistent_bytes; cxl_cmd_partition_info_get_next_volatile_bytes; cxl_cmd_partition_info_get_next_persistent_bytes; + cxl_cmd_new_set_partition_info; + cxl_memdev_set_partition_info; + cxl_cmd_partition_info_flag_none; + cxl_cmd_partition_info_flag_immediate; + local: *; }; diff --git a/cxl/lib/private.h b/cxl/lib/private.h index dd9234f..4da8ea7 100644 --- a/cxl/lib/private.h +++ b/cxl/lib/private.h @@ -114,6 +114,14 @@ struct cxl_cmd_get_partition_info { #define CXL_CAPACITY_MULTIPLIER SZ_256M +struct cxl_cmd_set_partition_info { + le64 volatile_capacity; + u8 flags; +} __attribute__((packed)); + +/* CXL 2.0 8.2.9.5.2 Set Partition Info */ +#define CXL_CMD_SET_PARTITION_INFO_FLAG_IMMEDIATE BIT(0) + /* CXL 2.0 8.2.9.5.3 Byte 0 Health Status */ #define CXL_CMD_HEALTH_INFO_STATUS_MAINTENANCE_NEEDED_MASK BIT(0) #define CXL_CMD_HEALTH_INFO_STATUS_PERFORMANCE_DEGRADED_MASK BIT(1) diff --git a/cxl/libcxl.h b/cxl/libcxl.h index f19ed4f..8f1a330 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -50,6 +50,8 @@ int cxl_memdev_read_label(struct cxl_memdev *memdev, void *buf, size_t length, size_t offset); int cxl_memdev_write_label(struct cxl_memdev *memdev, void *buf, size_t length, size_t offset); +int cxl_memdev_set_partition_info(struct cxl_memdev *memdev, + unsigned long long volatile_capacity, int flags); #define cxl_memdev_foreach(ctx, memdev) \ for (memdev = cxl_memdev_get_first(ctx); \ @@ -117,6 +119,9 @@ unsigned long long cxl_cmd_partition_info_get_active_volatile_bytes(struct cxl_c unsigned long long cxl_cmd_partition_info_get_active_persistent_bytes(struct cxl_cmd *cmd); unsigned long long cxl_cmd_partition_info_get_next_volatile_bytes(struct cxl_cmd *cmd); unsigned long long cxl_cmd_partition_info_get_next_persistent_bytes(struct cxl_cmd *cmd); +struct cxl_cmd *cxl_cmd_new_set_partition_info(struct cxl_memdev *memdev, + unsigned long long volatile_capacity, int flags); +int cxl_cmd_partition_info_flag_immediate(void); #ifdef __cplusplus } /* extern "C" */ -- 2.31.1
