[ndctl,v5,07/16] libcxl: add GET_HEALTH_INFO mailbox command and accessors

Message ID	20211111204436.1560365-8-vishal.l.verma@intel.com
State	New, archived
Headers	show Return-Path: <linux-cxl-owner@kernel.org> From: Vishal Verma <vishal.l.verma@intel.com> To: <linux-cxl@vger.kernel.org> Cc: Dan Williams <dan.j.williams@intel.com>, Ben Widawsky <ben.widawsky@intel.com>, <nvdimm@lists.linux.dev>, Vishal Verma <vishal.l.verma@intel.com> Subject: [ndctl PATCH v5 07/16] libcxl: add GET_HEALTH_INFO mailbox command and accessors Date: Thu, 11 Nov 2021 13:44:27 -0700 Message-Id: <20211111204436.1560365-8-vishal.l.verma@intel.com> In-Reply-To: <20211111204436.1560365-1-vishal.l.verma@intel.com> References: <20211111204436.1560365-1-vishal.l.verma@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Initial CXL support \| expand [ndctl,v5,00/16] Initial CXL support [ndctl,v5,01/16] ndctl: add .clang-format [ndctl,v5,02/16] cxl: add a cxl utility and libcxl library [ndctl,v5,03/16] cxl: add a local copy of the cxl_mem UAPI header [ndctl,v5,04/16] util: add the struct_size() helper from the kernel [ndctl,v5,05/16] libcxl: add support for command query and submission [ndctl,v5,06/16] libcxl: add support for the 'Identify Device' command [ndctl,v5,07/16] libcxl: add GET_HEALTH_INFO mailbox command and accessors [ndctl,v5,08/16] libcxl: add support for the 'GET_LSA' command [ndctl,v5,09/16] libcxl: add label_size to cxl_memdev, and an API to retrieve it [ndctl,v5,10/16] libcxl: add representation for an nvdimm bridge object [ndctl,v5,11/16] libcxl: add interfaces for label operations [ndctl,v5,12/16] cxl: add commands to read, write, and zero labels [ndctl,v5,13/16] Documentation/cxl: add library API documentation [ndctl,v5,14/16] ndctl: Add CXL packages to the RPM spec [ndctl,v5,15/16] cxl-cli: add bash completion [ndctl,v5,16/16] cxl: add health information to cxl-list

diff --git a/cxl/lib/private.h b/cxl/lib/private.h index 3273f21..885553a 100644 --- a/cxl/lib/private.h +++ b/cxl/lib/private.h @@ -73,6 +73,53 @@ struct cxl_cmd_identify { u8 qos_telemetry_caps; } __attribute__((packed)); +struct cxl_cmd_get_health_info { + u8 health_status; + u8 media_status; + u8 ext_status; + u8 life_used; + le16 temperature; + le32 dirty_shutdowns; + le32 volatile_errors; + le32 pmem_errors; +} __attribute__((packed)); + +/* 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) +#define CXL_CMD_HEALTH_INFO_STATUS_HW_REPLACEMENT_NEEDED_MASK BIT(2) + +/* CXL 2.0 8.2.9.5.3 Byte 1 Media Status */ +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_NORMAL 0x0 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_NOT_READY 0x1 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_PERSISTENCE_LOST 0x2 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_DATA_LOST 0x3 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_POWERLOSS_PERSISTENCE_LOSS 0x4 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_SHUTDOWN_PERSISTENCE_LOSS 0x5 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_PERSISTENCE_LOSS_IMMINENT 0x6 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_POWERLOSS_DATA_LOSS 0x7 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_SHUTDOWN_DATA_LOSS 0x8 +#define CXL_CMD_HEALTH_INFO_MEDIA_STATUS_DATA_LOSS_IMMINENT 0x9 + +/* CXL 2.0 8.2.9.5.3 Byte 2 Additional Status */ +#define CXL_CMD_HEALTH_INFO_EXT_LIFE_USED_MASK GENMASK(1, 0) +#define CXL_CMD_HEALTH_INFO_EXT_LIFE_USED_NORMAL (0) +#define CXL_CMD_HEALTH_INFO_EXT_LIFE_USED_WARNING (1) +#define CXL_CMD_HEALTH_INFO_EXT_LIFE_USED_CRITICAL (2) +#define CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE_MASK GENMASK(3, 2) +#define CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE_NORMAL (0) +#define CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE_WARNING (1) +#define CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE_CRITICAL (2) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_VOLATILE_MASK BIT(4) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_VOLATILE_NORMAL (0) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_VOLATILE_WARNING (1) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_PERSISTENT_MASK BIT(5) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_PERSISTENT_NORMAL (0) +#define CXL_CMD_HEALTH_INFO_EXT_CORRECTED_PERSISTENT_WARNING (1) + +#define CXL_CMD_HEALTH_INFO_LIFE_USED_NOT_IMPL 0xff +#define CXL_CMD_HEALTH_INFO_TEMPERATURE_NOT_IMPL 0xffff + static inline int check_kmod(struct kmod_ctx *kmod_ctx) { return kmod_ctx ? 0 : -ENXIO; diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index ed21670..065824d 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -677,6 +677,297 @@ CXL_EXPORT const char *cxl_cmd_get_devname(struct cxl_cmd *cmd) return cxl_memdev_get_devname(cmd->memdev); } +static int cxl_cmd_validate_status(struct cxl_cmd *cmd, u32 id) +{ + if (cmd->send_cmd->id != id) + return -EINVAL; + if (cmd->status < 0) + return cmd->status; + return 0; +} + +/* Helpers for health_info fields (no endian conversion) */ +#define cmd_get_field_u8(cmd, n, N, field) \ +do { \ + struct cxl_cmd_##n *c = \ + (struct cxl_cmd_##n *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_##N); \ + if (rc) \ + return rc; \ + return c->field; \ +} while(0) + +#define cmd_get_field_u16(cmd, n, N, field) \ +do { \ + struct cxl_cmd_##n *c = \ + (struct cxl_cmd_##n *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_##N); \ + if (rc) \ + return rc; \ + return le16_to_cpu(c->field); \ +} while(0) + + +#define cmd_get_field_u32(cmd, n, N, field) \ +do { \ + struct cxl_cmd_##n *c = \ + (struct cxl_cmd_##n *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_##N); \ + if (rc) \ + return rc; \ + return le32_to_cpu(c->field); \ +} while(0) + + +#define cmd_get_field_u8_mask(cmd, n, N, field, mask) \ +do { \ + struct cxl_cmd_##n *c = \ + (struct cxl_cmd_##n *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_##N); \ + if (rc) \ + return rc; \ + return !!(c->field & mask); \ +} while(0) + +CXL_EXPORT struct cxl_cmd *cxl_cmd_new_get_health_info( + struct cxl_memdev *memdev) +{ + return cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_GET_HEALTH_INFO); +} + +#define cmd_health_get_status_field(c, m) \ + cmd_get_field_u8_mask(c, get_health_info, GET_HEALTH_INFO, health_status, m) + +CXL_EXPORT int cxl_cmd_health_info_get_maintenance_needed(struct cxl_cmd *cmd) +{ + cmd_health_get_status_field(cmd, + CXL_CMD_HEALTH_INFO_STATUS_MAINTENANCE_NEEDED_MASK); +} + +CXL_EXPORT int cxl_cmd_health_info_get_performance_degraded(struct cxl_cmd *cmd) +{ + cmd_health_get_status_field(cmd, + CXL_CMD_HEALTH_INFO_STATUS_PERFORMANCE_DEGRADED_MASK); +} + +CXL_EXPORT int cxl_cmd_health_info_get_hw_replacement_needed(struct cxl_cmd *cmd) +{ + cmd_health_get_status_field(cmd, + CXL_CMD_HEALTH_INFO_STATUS_HW_REPLACEMENT_NEEDED_MASK); +} + +#define cmd_health_check_media_field(cmd, f) \ +do { \ + struct cxl_cmd_get_health_info *c = \ + (struct cxl_cmd_get_health_info *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, \ + CXL_MEM_COMMAND_ID_GET_HEALTH_INFO); \ + if (rc) \ + return rc; \ + return (c->media_status == f); \ +} while(0) + +CXL_EXPORT int cxl_cmd_health_info_get_media_normal(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_NORMAL); +} + +CXL_EXPORT int cxl_cmd_health_info_get_media_not_ready(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_NOT_READY); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_persistence_lost(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_PERSISTENCE_LOST); +} + +CXL_EXPORT int cxl_cmd_health_info_get_media_data_lost(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_DATA_LOST); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_powerloss_persistence_loss(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_POWERLOSS_PERSISTENCE_LOSS); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_shutdown_persistence_loss(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_SHUTDOWN_PERSISTENCE_LOSS); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_persistence_loss_imminent(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_PERSISTENCE_LOSS_IMMINENT); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_powerloss_data_loss(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_POWERLOSS_DATA_LOSS); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_shutdown_data_loss(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_SHUTDOWN_DATA_LOSS); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_media_data_loss_imminent(struct cxl_cmd *cmd) +{ + cmd_health_check_media_field(cmd, + CXL_CMD_HEALTH_INFO_MEDIA_STATUS_DATA_LOSS_IMMINENT); +} + +#define cmd_health_check_ext_field(cmd, fname, type) \ +do { \ + struct cxl_cmd_get_health_info *c = \ + (struct cxl_cmd_get_health_info *)cmd->send_cmd->out.payload; \ + int rc = cxl_cmd_validate_status(cmd, \ + CXL_MEM_COMMAND_ID_GET_HEALTH_INFO); \ + if (rc) \ + return rc; \ + return (FIELD_GET(fname##_MASK, c->ext_status) == \ + fname##_##type); \ +} while(0) + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_life_used_normal(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_LIFE_USED, NORMAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_life_used_warning(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_LIFE_USED, WARNING); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_life_used_critical(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_LIFE_USED, CRITICAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_temperature_normal(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE, NORMAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_temperature_warning(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE, WARNING); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_temperature_critical(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_TEMPERATURE, CRITICAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_corrected_volatile_normal(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_CORRECTED_VOLATILE, NORMAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_corrected_volatile_warning(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_CORRECTED_VOLATILE, WARNING); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_corrected_persistent_normal(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_CORRECTED_PERSISTENT, NORMAL); +} + +CXL_EXPORT int +cxl_cmd_health_info_get_ext_corrected_persistent_warning(struct cxl_cmd *cmd) +{ + cmd_health_check_ext_field(cmd, + CXL_CMD_HEALTH_INFO_EXT_CORRECTED_PERSISTENT, WARNING); +} + +static int health_info_get_life_used_raw(struct cxl_cmd *cmd) +{ + cmd_get_field_u8(cmd, get_health_info, GET_HEALTH_INFO, + life_used); +} + +CXL_EXPORT int cxl_cmd_health_info_get_life_used(struct cxl_cmd *cmd) +{ + int rc = health_info_get_life_used_raw(cmd); + + if (rc < 0) + return rc; + if (rc == CXL_CMD_HEALTH_INFO_LIFE_USED_NOT_IMPL) + return -EOPNOTSUPP; + return rc; +} + +static int health_info_get_temperature_raw(struct cxl_cmd *cmd) +{ + cmd_get_field_u16(cmd, get_health_info, GET_HEALTH_INFO, + temperature); +} + +CXL_EXPORT int cxl_cmd_health_info_get_temperature(struct cxl_cmd *cmd) +{ + int rc = health_info_get_temperature_raw(cmd); + + if (rc < 0) + return rc; + if (rc == CXL_CMD_HEALTH_INFO_TEMPERATURE_NOT_IMPL) + return -EOPNOTSUPP; + return rc; +} + +CXL_EXPORT int cxl_cmd_health_info_get_dirty_shutdowns(struct cxl_cmd *cmd) +{ + cmd_get_field_u32(cmd, get_health_info, GET_HEALTH_INFO, + dirty_shutdowns); +} + +CXL_EXPORT int cxl_cmd_health_info_get_volatile_errors(struct cxl_cmd *cmd) +{ + cmd_get_field_u32(cmd, get_health_info, GET_HEALTH_INFO, + volatile_errors); +} + +CXL_EXPORT int cxl_cmd_health_info_get_pmem_errors(struct cxl_cmd *cmd) +{ + cmd_get_field_u32(cmd, get_health_info, GET_HEALTH_INFO, + pmem_errors); +} + CXL_EXPORT struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev) { return cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_IDENTIFY); diff --git a/cxl/libcxl.h b/cxl/libcxl.h index 0f2d5e9..eae2db8 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -62,6 +62,39 @@ struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev); int cxl_cmd_identify_get_fw_rev(struct cxl_cmd *cmd, char *fw_rev, int fw_len); unsigned long long cxl_cmd_identify_get_partition_align(struct cxl_cmd *cmd); unsigned int cxl_cmd_identify_get_label_size(struct cxl_cmd *cmd); +struct cxl_cmd *cxl_cmd_new_get_health_info(struct cxl_memdev *memdev); +int cxl_cmd_health_info_get_maintenance_needed(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_performance_degraded(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_hw_replacement_needed(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_not_ready(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_persistence_lost(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_data_lost(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_not_ready(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_persistence_lost(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_data_lost(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_powerloss_persistence_loss(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_shutdown_persistence_loss(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_persistence_loss_imminent(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_powerloss_data_loss(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_shutdown_data_loss(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_media_data_loss_imminent(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_life_used_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_life_used_warning(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_life_used_critical(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_temperature_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_temperature_warning(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_temperature_critical(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_corrected_volatile_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_corrected_volatile_warning(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_corrected_persistent_normal(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_ext_corrected_persistent_warning(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_life_used(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_temperature(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_dirty_shutdowns(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_volatile_errors(struct cxl_cmd *cmd); +int cxl_cmd_health_info_get_pmem_errors(struct cxl_cmd *cmd); #ifdef __cplusplus } /* extern "C" */ diff --git a/util/bitmap.h b/util/bitmap.h index 490f3f0..04b3429 100644 --- a/util/bitmap.h +++ b/util/bitmap.h @@ -3,10 +3,33 @@ #ifndef _NDCTL_BITMAP_H_ #define _NDCTL_BITMAP_H_ +#include <linux/const.h> #include <util/size.h> +#include <util/util.h> #include <ccan/short_types/short_types.h> +#ifndef _UL +#define _UL(x) (_AC(x, UL)) +#endif +#ifndef _ULL +#define _ULL(x) (_AC(x, ULL)) +#endif + #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) +#define UL(x) (_UL(x)) +#define ULL(x) (_ULL(x)) + +/* GENMASK() and its dependencies copied from include/linux/{bits.h, const.h} */ +#define __is_constexpr(x) \ + (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) +#define GENMASK_INPUT_CHECK(h, l) \ + (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \ + __is_constexpr((l) > (h)), (l) > (h), 0))) +#define __GENMASK(h, l) \ + (((~UL(0)) - (UL(1) << (l)) + 1) & \ + (~UL(0) >> (BITS_PER_LONG - 1 - (h)))) +#define GENMASK(h, l) \ + (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) #define BIT(nr) (1UL << (nr)) #define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) @@ -30,5 +53,67 @@ unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size, unsigned long offset); int bitmap_full(const unsigned long *src, unsigned int nbits); +/* + * Bitfield access macros + * (Copied from Linux's include/linux/bitfield.h) + * + * FIELD_{GET,PREP} macros take as first parameter shifted mask + * from which they extract the base mask and shift amount. + * Mask must be a compilation time constant. + * + * Example: + * + * #define REG_FIELD_A GENMASK(6, 0) + * #define REG_FIELD_B BIT(7) + * #define REG_FIELD_C GENMASK(15, 8) + * #define REG_FIELD_D GENMASK(31, 16) + * + * Get: + * a = FIELD_GET(REG_FIELD_A, reg); + * b = FIELD_GET(REG_FIELD_B, reg); + * + * Set: + * reg = FIELD_PREP(REG_FIELD_A, 1) | + * FIELD_PREP(REG_FIELD_B, 0) | + * FIELD_PREP(REG_FIELD_C, c) | + * FIELD_PREP(REG_FIELD_D, 0x40); + * + * Modify: + * reg &= ~REG_FIELD_C; + * reg |= FIELD_PREP(REG_FIELD_C, c); + */ + +/* Force a compilation error if a constant expression is not a power of 2 */ +#define __BUILD_BUG_ON_NOT_POWER_OF_2(n) \ + BUILD_BUG_ON(((n) & ((n) - 1)) != 0) +#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \ + BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0)) + +#define __bf_shf(x) (__builtin_ffsll(x) - 1) + +#define __BF_FIELD_CHECK(_mask, _reg, _val) \ + ({ \ + BUILD_BUG_ON(!__builtin_constant_p(_mask)); \ + BUILD_BUG_ON((_mask) == 0); \ + BUILD_BUG_ON(__builtin_constant_p(_val) ? \ + ~((_mask) >> __bf_shf(_mask)) & (_val) : 0); \ + BUILD_BUG_ON((_mask) > (typeof(_reg))~0ull); \ + __BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \ + (1ULL << __bf_shf(_mask))); \ + }) + +/** + * FIELD_GET() - extract a bitfield element + * @_mask: shifted mask defining the field's length and position + * @_reg: value of entire bitfield + * + * FIELD_GET() extracts the field specified by @_mask from the + * bitfield passed in as @_reg by masking and shifting it down. + */ +#define FIELD_GET(_mask, _reg) \ + ({ \ + __BF_FIELD_CHECK(_mask, _reg, 0U); \ + (typeof(_mask))(((_reg) & (_mask)) >> __bf_shf(_mask)); \ + }) #endif /* _NDCTL_BITMAP_H_ */ diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index 1dc45f4..c83bc28 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -33,6 +33,35 @@ global: cxl_cmd_identify_get_fw_rev; cxl_cmd_identify_get_partition_align; cxl_cmd_identify_get_label_size; + cxl_cmd_new_get_health_info; + cxl_cmd_health_info_get_maintenance_needed; + cxl_cmd_health_info_get_performance_degraded; + cxl_cmd_health_info_get_hw_replacement_needed; + cxl_cmd_health_info_get_media_normal; + cxl_cmd_health_info_get_media_not_ready; + cxl_cmd_health_info_get_media_persistence_lost; + cxl_cmd_health_info_get_media_data_lost; + cxl_cmd_health_info_get_media_powerloss_persistence_loss; + cxl_cmd_health_info_get_media_shutdown_persistence_loss; + cxl_cmd_health_info_get_media_persistence_loss_imminent; + cxl_cmd_health_info_get_media_powerloss_data_loss; + cxl_cmd_health_info_get_media_shutdown_data_loss; + cxl_cmd_health_info_get_media_data_loss_imminent; + cxl_cmd_health_info_get_ext_life_used_normal; + cxl_cmd_health_info_get_ext_life_used_warning; + cxl_cmd_health_info_get_ext_life_used_critical; + cxl_cmd_health_info_get_ext_temperature_normal; + cxl_cmd_health_info_get_ext_temperature_warning; + cxl_cmd_health_info_get_ext_temperature_critical; + cxl_cmd_health_info_get_ext_corrected_volatile_normal; + cxl_cmd_health_info_get_ext_corrected_volatile_warning; + cxl_cmd_health_info_get_ext_corrected_persistent_normal; + cxl_cmd_health_info_get_ext_corrected_persistent_warning; + cxl_cmd_health_info_get_life_used; + cxl_cmd_health_info_get_temperature; + cxl_cmd_health_info_get_dirty_shutdowns; + cxl_cmd_health_info_get_volatile_errors; + cxl_cmd_health_info_get_pmem_errors; local: *; };

[ndctl,v5,07/16] libcxl: add GET_HEALTH_INFO mailbox command and accessors

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