nvme: add verbose error logging

Improves logging of NVMe errors.  If NVME_VERBOSE_ERRORS is configured,
a verbose description of the error is logged, otherwise only status
codes/bits is logged.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
[kch]: fix several nits, cosmetics, and trim down code.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Alan Adamson <alan.adamson@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>

5 files changed, 246 insertions, 1 deletions

diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig
index dc0450ca23a3..d6d056963c06 100644
--- a/drivers/nvme/host/Kconfig
+++ b/drivers/nvme/host/Kconfig
@@ -24,6 +24,14 @@ config NVME_MULTIPATH
 	   /dev/nvmeXnY device will show up for each NVMe namespace,
 	   even if it is accessible through multiple controllers.
 
+config NVME_VERBOSE_ERRORS
+	bool "NVMe verbose error reporting"
+	depends on NVME_CORE
+	help
+	   This option enables verbose reporting for NVMe errors. The
+	   error translation table will grow the kernel image size by
+	   about 4 KB.
+
 config NVME_HWMON
 	bool "NVMe hardware monitoring"
 	depends on (NVME_CORE=y && HWMON=y) || (NVME_CORE=m && HWMON)
diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile
index dfaacd472e5d..476c5c988496 100644
--- a/drivers/nvme/host/Makefile
+++ b/drivers/nvme/host/Makefile
@@ -9,7 +9,7 @@ obj-$(CONFIG_NVME_RDMA)			+= nvme-rdma.o
 obj-$(CONFIG_NVME_FC)			+= nvme-fc.o
 obj-$(CONFIG_NVME_TCP)			+= nvme-tcp.o
 
-nvme-core-y				:= core.o ioctl.o
+nvme-core-y				:= core.o ioctl.o constants.o
 nvme-core-$(CONFIG_TRACING)		+= trace.o
 nvme-core-$(CONFIG_NVME_MULTIPATH)	+= multipath.o
 nvme-core-$(CONFIG_BLK_DEV_ZONED)	+= zns.o
diff --git a/drivers/nvme/host/constants.c b/drivers/nvme/host/constants.c
new file mode 100644
index 000000000000..7d49eb34b348
--- /dev/null
+++ b/drivers/nvme/host/constants.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NVM Express device driver verbose errors
+ * Copyright (c) 2022, Oracle and/or its affiliates
+ */
+
+#include <linux/blkdev.h>
+#include "nvme.h"
+
+#ifdef CONFIG_NVME_VERBOSE_ERRORS
+static const char * const nvme_ops[] = {
+	[nvme_cmd_flush] = "Flush",
+	[nvme_cmd_write] = "Write",
+	[nvme_cmd_read] = "Read",
+	[nvme_cmd_write_uncor] = "Write Uncorrectable",
+	[nvme_cmd_compare] = "Compare",
+	[nvme_cmd_write_zeroes] = "Write Zeros",
+	[nvme_cmd_dsm] = "Dataset Management",
+	[nvme_cmd_verify] = "Verify",
+	[nvme_cmd_resv_register] = "Reservation Register",
+	[nvme_cmd_resv_report] = "Reservation Report",
+	[nvme_cmd_resv_acquire] = "Reservation Acquire",
+	[nvme_cmd_resv_release] = "Reservation Release",
+	[nvme_cmd_zone_mgmt_send] = "Zone Management Send",
+	[nvme_cmd_zone_mgmt_recv] = "Zone Management Receive",
+	[nvme_cmd_zone_append] = "Zone Management Append",
+};
+
+static const char * const nvme_admin_ops[] = {
+	[nvme_admin_delete_sq] = "Delete SQ",
+	[nvme_admin_create_sq] = "Create SQ",
+	[nvme_admin_get_log_page] = "Get Log Page",
+	[nvme_admin_delete_cq] = "Delete CQ",
+	[nvme_admin_create_cq] = "Create CQ",
+	[nvme_admin_identify] = "Identify",
+	[nvme_admin_abort_cmd] = "Abort Command",
+	[nvme_admin_set_features] = "Set Features",
+	[nvme_admin_get_features] = "Get Features",
+	[nvme_admin_async_event] = "Async Event",
+	[nvme_admin_ns_mgmt] = "Namespace Management",
+	[nvme_admin_activate_fw] = "Activate Firmware",
+	[nvme_admin_download_fw] = "Download Firmware",
+	[nvme_admin_dev_self_test] = "Device Self Test",
+	[nvme_admin_ns_attach] = "Namespace Attach",
+	[nvme_admin_keep_alive] = "Keep Alive",
+	[nvme_admin_directive_send] = "Directive Send",
+	[nvme_admin_directive_recv] = "Directive Receive",
+	[nvme_admin_virtual_mgmt] = "Virtual Management",
+	[nvme_admin_nvme_mi_send] = "NVMe Send MI",
+	[nvme_admin_nvme_mi_recv] = "NVMe Receive MI",
+	[nvme_admin_dbbuf] = "Doorbell Buffer Config",
+	[nvme_admin_format_nvm] = "Format NVM",
+	[nvme_admin_security_send] = "Security Send",
+	[nvme_admin_security_recv] = "Security Receive",
+	[nvme_admin_sanitize_nvm] = "Sanitize NVM",
+	[nvme_admin_get_lba_status] = "Get LBA Status",
+};
+
+static const char * const nvme_statuses[] = {
+	[NVME_SC_SUCCESS] = "Success",
+	[NVME_SC_INVALID_OPCODE] = "Invalid Command Opcode",
+	[NVME_SC_INVALID_FIELD] = "Invalid Field in Command",
+	[NVME_SC_CMDID_CONFLICT] = "Command ID Conflict",
+	[NVME_SC_DATA_XFER_ERROR] = "Data Transfer Error",
+	[NVME_SC_POWER_LOSS] = "Commands Aborted due to Power Loss Notification",
+	[NVME_SC_INTERNAL] = "Internal Error",
+	[NVME_SC_ABORT_REQ] = "Command Abort Requested",
+	[NVME_SC_ABORT_QUEUE] = "Command Aborted due to SQ Deletion",
+	[NVME_SC_FUSED_FAIL] = "Command Aborted due to Failed Fused Command",
+	[NVME_SC_FUSED_MISSING] = "Command Aborted due to Missing Fused Command",
+	[NVME_SC_INVALID_NS] = "Invalid Namespace or Format",
+	[NVME_SC_CMD_SEQ_ERROR] = "Command Sequence Error",
+	[NVME_SC_SGL_INVALID_LAST] = "Invalid SGL Segment Descriptor",
+	[NVME_SC_SGL_INVALID_COUNT] = "Invalid Number of SGL Descriptors",
+	[NVME_SC_SGL_INVALID_DATA] = "Data SGL Length Invalid",
+	[NVME_SC_SGL_INVALID_METADATA] = "Metadata SGL Length Invalid",
+	[NVME_SC_SGL_INVALID_TYPE] = "SGL Descriptor Type Invalid",
+	[NVME_SC_CMB_INVALID_USE] = "Invalid Use of Controller Memory Buffer",
+	[NVME_SC_PRP_INVALID_OFFSET] = "PRP Offset Invalid",
+	[NVME_SC_ATOMIC_WU_EXCEEDED] = "Atomic Write Unit Exceeded",
+	[NVME_SC_OP_DENIED] = "Operation Denied",
+	[NVME_SC_SGL_INVALID_OFFSET] = "SGL Offset Invalid",
+	[NVME_SC_RESERVED] = "Reserved",
+	[NVME_SC_HOST_ID_INCONSIST] = "Host Identifier Inconsistent Format",
+	[NVME_SC_KA_TIMEOUT_EXPIRED] = "Keep Alive Timeout Expired",
+	[NVME_SC_KA_TIMEOUT_INVALID] = "Keep Alive Timeout Invalid",
+	[NVME_SC_ABORTED_PREEMPT_ABORT] = "Command Aborted due to Preempt and Abort",
+	[NVME_SC_SANITIZE_FAILED] = "Sanitize Failed",
+	[NVME_SC_SANITIZE_IN_PROGRESS] = "Sanitize In Progress",
+	[NVME_SC_SGL_INVALID_GRANULARITY] = "SGL Data Block Granularity Invalid",
+	[NVME_SC_CMD_NOT_SUP_CMB_QUEUE] = "Command Not Supported for Queue in CMB",
+	[NVME_SC_NS_WRITE_PROTECTED] = "Namespace is Write Protected",
+	[NVME_SC_CMD_INTERRUPTED] = "Command Interrupted",
+	[NVME_SC_TRANSIENT_TR_ERR] = "Transient Transport Error",
+	[NVME_SC_INVALID_IO_CMD_SET] = "Invalid IO Command Set",
+	[NVME_SC_LBA_RANGE] = "LBA Out of Range",
+	[NVME_SC_CAP_EXCEEDED] = "Capacity Exceeded",
+	[NVME_SC_NS_NOT_READY] = "Namespace Not Ready",
+	[NVME_SC_RESERVATION_CONFLICT] = "Reservation Conflict",
+	[NVME_SC_FORMAT_IN_PROGRESS] = "Format In Progress",
+	[NVME_SC_CQ_INVALID] = "Completion Queue Invalid",
+	[NVME_SC_QID_INVALID] = "Invalid Queue Identifier",
+	[NVME_SC_QUEUE_SIZE] = "Invalid Queue Size",
+	[NVME_SC_ABORT_LIMIT] = "Abort Command Limit Exceeded",
+	[NVME_SC_ABORT_MISSING] = "Reserved", /* XXX */
+	[NVME_SC_ASYNC_LIMIT] = "Asynchronous Event Request Limit Exceeded",
+	[NVME_SC_FIRMWARE_SLOT] = "Invalid Firmware Slot",
+	[NVME_SC_FIRMWARE_IMAGE] = "Invalid Firmware Image",
+	[NVME_SC_INVALID_VECTOR] = "Invalid Interrupt Vector",
+	[NVME_SC_INVALID_LOG_PAGE] = "Invalid Log Page",
+	[NVME_SC_INVALID_FORMAT] = "Invalid Format",
+	[NVME_SC_FW_NEEDS_CONV_RESET] = "Firmware Activation Requires Conventional Reset",
+	[NVME_SC_INVALID_QUEUE] = "Invalid Queue Deletion",
+	[NVME_SC_FEATURE_NOT_SAVEABLE] = "Feature Identifier Not Saveable",
+	[NVME_SC_FEATURE_NOT_CHANGEABLE] = "Feature Not Changeable",
+	[NVME_SC_FEATURE_NOT_PER_NS] = "Feature Not Namespace Specific",
+	[NVME_SC_FW_NEEDS_SUBSYS_RESET] = "Firmware Activation Requires NVM Subsystem Reset",
+	[NVME_SC_FW_NEEDS_RESET] = "Firmware Activation Requires Reset",
+	[NVME_SC_FW_NEEDS_MAX_TIME] = "Firmware Activation Requires Maximum Time Violation",
+	[NVME_SC_FW_ACTIVATE_PROHIBITED] = "Firmware Activation Prohibited",
+	[NVME_SC_OVERLAPPING_RANGE] = "Overlapping Range",
+	[NVME_SC_NS_INSUFFICIENT_CAP] = "Namespace Insufficient Capacity",
+	[NVME_SC_NS_ID_UNAVAILABLE] = "Namespace Identifier Unavailable",
+	[NVME_SC_NS_ALREADY_ATTACHED] = "Namespace Already Attached",
+	[NVME_SC_NS_IS_PRIVATE] = "Namespace Is Private",
+	[NVME_SC_NS_NOT_ATTACHED] = "Namespace Not Attached",
+	[NVME_SC_THIN_PROV_NOT_SUPP] = "Thin Provisioning Not Supported",
+	[NVME_SC_CTRL_LIST_INVALID] = "Controller List Invalid",
+	[NVME_SC_SELT_TEST_IN_PROGRESS] = "Device Self-test In Progress",
+	[NVME_SC_BP_WRITE_PROHIBITED] = "Boot Partition Write Prohibited",
+	[NVME_SC_CTRL_ID_INVALID] = "Invalid Controller Identifier",
+	[NVME_SC_SEC_CTRL_STATE_INVALID] = "Invalid Secondary Controller State",
+	[NVME_SC_CTRL_RES_NUM_INVALID] = "Invalid Number of Controller Resources",
+	[NVME_SC_RES_ID_INVALID] = "Invalid Resource Identifier",
+	[NVME_SC_PMR_SAN_PROHIBITED] = "Sanitize Prohibited",
+	[NVME_SC_ANA_GROUP_ID_INVALID] = "ANA Group Identifier Invalid",
+	[NVME_SC_ANA_ATTACH_FAILED] = "ANA Attach Failed",
+	[NVME_SC_BAD_ATTRIBUTES] = "Conflicting Attributes",
+	[NVME_SC_INVALID_PI] = "Invalid Protection Information",
+	[NVME_SC_READ_ONLY] = "Attempted Write to Read Only Range",
+	[NVME_SC_ONCS_NOT_SUPPORTED] = "ONCS Not Supported",
+	[NVME_SC_ZONE_BOUNDARY_ERROR] = "Zoned Boundary Error",
+	[NVME_SC_ZONE_FULL] = "Zone Is Full",
+	[NVME_SC_ZONE_READ_ONLY] = "Zone Is Read Only",
+	[NVME_SC_ZONE_OFFLINE] = "Zone Is Offline",
+	[NVME_SC_ZONE_INVALID_WRITE] = "Zone Invalid Write",
+	[NVME_SC_ZONE_TOO_MANY_ACTIVE] = "Too Many Active Zones",
+	[NVME_SC_ZONE_TOO_MANY_OPEN] = "Too Many Open Zones",
+	[NVME_SC_ZONE_INVALID_TRANSITION] = "Invalid Zone State Transition",
+	[NVME_SC_WRITE_FAULT] = "Write Fault",
+	[NVME_SC_READ_ERROR] = "Unrecovered Read Error",
+	[NVME_SC_GUARD_CHECK] = "End-to-end Guard Check Error",
+	[NVME_SC_APPTAG_CHECK] = "End-to-end Application Tag Check Error",
+	[NVME_SC_REFTAG_CHECK] = "End-to-end Reference Tag Check Error",
+	[NVME_SC_COMPARE_FAILED] = "Compare Failure",
+	[NVME_SC_ACCESS_DENIED] = "Access Denied",
+	[NVME_SC_UNWRITTEN_BLOCK] = "Deallocated or Unwritten Logical Block",
+	[NVME_SC_ANA_PERSISTENT_LOSS] = "Asymmetric Access Persistent Loss",
+	[NVME_SC_ANA_INACCESSIBLE] = "Asymmetric Access Inaccessible",
+	[NVME_SC_ANA_TRANSITION] = "Asymmetric Access Transition",
+	[NVME_SC_HOST_PATH_ERROR] = "Host Pathing Error",
+};
+
+const unsigned char *nvme_get_error_status_str(u16 status)
+{
+	status &= 0x7ff;
+	if (status < ARRAY_SIZE(nvme_statuses) && nvme_statuses[status])
+		return nvme_statuses[status & 0x7ff];
+	return "Unknown";
+}
+
+const unsigned char *nvme_get_opcode_str(u8 opcode)
+{
+	if (opcode < ARRAY_SIZE(nvme_ops) && nvme_ops[opcode])
+		return nvme_ops[opcode];
+	return "Unknown";
+}
+
+const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
+{
+	if (opcode < ARRAY_SIZE(nvme_admin_ops) && nvme_admin_ops[opcode])
+		return nvme_admin_ops[opcode];
+	return "Unknown";
+}
+#endif /* CONFIG_NVME_VERBOSE_ERRORS */
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index da0e19148177..5e55732f3ea1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -299,6 +299,37 @@ static void nvme_retry_req(struct request *req)
 	blk_mq_delay_kick_requeue_list(req->q, delay);
 }
 
+static void nvme_log_error(struct request *req)
+{
+	struct nvme_ns *ns = req->q->queuedata;
+	struct nvme_request *nr = nvme_req(req);
+
+	if (ns) {
+		pr_err_ratelimited("%s: %s(0x%x) @ LBA %llu, %llu blocks, %s (sct 0x%x / sc 0x%x) %s%s\n",
+		       ns->disk ? ns->disk->disk_name : "?",
+		       nvme_get_opcode_str(nr->cmd->common.opcode),
+		       nr->cmd->common.opcode,
+		       (unsigned long long)nvme_sect_to_lba(ns, blk_rq_pos(req)),
+		       (unsigned long long)blk_rq_bytes(req) >> ns->lba_shift,
+		       nvme_get_error_status_str(nr->status),
+		       nr->status >> 8 & 7,	/* Status Code Type */
+		       nr->status & 0xff,	/* Status Code */
+		       nr->status & NVME_SC_MORE ? "MORE " : "",
+		       nr->status & NVME_SC_DNR  ? "DNR "  : "");
+		return;
+	}
+
+	pr_err_ratelimited("%s: %s(0x%x), %s (sct 0x%x / sc 0x%x) %s%s\n",
+			   dev_name(nr->ctrl->device),
+			   nvme_get_admin_opcode_str(nr->cmd->common.opcode),
+			   nr->cmd->common.opcode,
+			   nvme_get_error_status_str(nr->status),
+			   nr->status >> 8 & 7,	/* Status Code Type */
+			   nr->status & 0xff,	/* Status Code */
+			   nr->status & NVME_SC_MORE ? "MORE " : "",
+			   nr->status & NVME_SC_DNR  ? "DNR "  : "");
+}
+
 enum nvme_disposition {
 	COMPLETE,
 	RETRY,
@@ -339,6 +370,8 @@ static inline void nvme_end_req(struct request *req)
 {
 	blk_status_t status = nvme_error_status(nvme_req(req)->status);
 
+	if (unlikely(nvme_req(req)->status != NVME_SC_SUCCESS))
+		nvme_log_error(req);
 	nvme_end_req_zoned(req);
 	nvme_trace_bio_complete(req);
 	blk_mq_end_request(req, status);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index f8658f984d64..08893c04ca89 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -938,4 +938,23 @@ static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
 	return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
 }
 
+#ifdef CONFIG_NVME_VERBOSE_ERRORS
+const unsigned char *nvme_get_error_status_str(u16 status);
+const unsigned char *nvme_get_opcode_str(u8 opcode);
+const unsigned char *nvme_get_admin_opcode_str(u8 opcode);
+#else /* CONFIG_NVME_VERBOSE_ERRORS */
+static inline const unsigned char *nvme_get_error_status_str(u16 status)
+{
+	return "I/O Error";
+}
+static inline const unsigned char *nvme_get_opcode_str(u8 opcode)
+{
+	return "I/O Cmd";
+}
+static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode)
+{
+	return "Admin Cmd";
+}
+#endif /* CONFIG_NVME_VERBOSE_ERRORS */
+
 #endif /* _NVME_H */