* [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-13 12:22 ` Jonathan Cameron
2023-01-09 19:42 ` [PATCH v6 2/8] cxl/mem: Wire up event interrupts ira.weiny
` (6 subsequent siblings)
7 siblings, 1 reply; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
CXL devices have multiple event logs which can be queried for CXL event
records. Devices are required to support the storage of at least one
event record in each event log type.
Devices track event log overflow by incrementing a counter and tracking
the time of the first and last overflow event seen.
Software queries events via the Get Event Record mailbox command; CXL
rev 3.0 section 8.2.9.2.2 and clears events via CXL rev 3.0 section
8.2.9.2.3 Clear Event Records mailbox command.
If the result of negotiating CXL Error Reporting Control is OS control,
read and clear all event logs on driver load.
Ensure a clean slate of events by reading and clearing the events on
driver load.
The status register is not used because a device may continue to trigger
events and the only requirement is to empty the log at least once. This
allows for the required transition from empty to non-empty for interrupt
generation. Handling of interrupts is in a follow on patch.
The device can return up to 1MB worth of event records per query.
Allocate a shared large buffer to handle the max number of records based
on the mailbox payload size.
This patch traces a raw event record and leaves specific event record
type tracing to subsequent patches. Macros are created to aid in
tracing the common CXL Event header fields.
Each record is cleared explicitly. A clear all bit is specified but is
only valid when the log overflows.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Jonathan/Johnny
Clear limit mailbox size based on nr records
Jonathan
Use offsetof() in CXL_CLEAR_EVENT_LIMIT_HANDLES()
---
drivers/cxl/core/mbox.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/cxl/core/trace.h | 120 +++++++++++++++++++++++++++++++++++++++++
drivers/cxl/cxl.h | 12 +++++
drivers/cxl/cxlmem.h | 86 +++++++++++++++++++++++++++++
drivers/cxl/pci.c | 40 ++++++++++++++
5 files changed, 395 insertions(+)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index b03fba212799..5ad4716f2e11 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -8,6 +8,7 @@
#include <cxl.h>
#include "core.h"
+#include "trace.h"
static bool cxl_raw_allow_all;
@@ -717,6 +718,141 @@ int cxl_enumerate_cmds(struct cxl_dev_state *cxlds)
}
EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL);
+static int cxl_clear_event_record(struct cxl_dev_state *cxlds,
+ enum cxl_event_log_type log,
+ struct cxl_get_event_payload *get_pl)
+{
+ struct cxl_mbox_clear_event_payload payload = {
+ .event_log = log,
+ };
+ u16 total = le16_to_cpu(get_pl->record_count);
+ u8 max_handles = CXL_CLEAR_EVENT_MAX_HANDLES;
+ size_t pl_size = sizeof(payload);
+ struct cxl_mbox_cmd mbox_cmd;
+ u16 cnt;
+ int rc;
+ int i;
+
+ /* Payload size may limit the max handles */
+ if (pl_size > cxlds->payload_size) {
+ max_handles = CXL_CLEAR_EVENT_LIMIT_HANDLES(cxlds->payload_size);
+ pl_size = CXL_CLEAR_EVENT_PL_SIZE(max_handles);
+ }
+
+ mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_CLEAR_EVENT_RECORD,
+ .payload_in = &payload,
+ .size_in = pl_size,
+ };
+
+ /*
+ * Clear Event Records uses u8 for the handle cnt while Get Event
+ * Record can return up to 0xffff records.
+ */
+ i = 0;
+ for (cnt = 0; cnt < total; cnt++) {
+ payload.handle[i++] = get_pl->records[cnt].hdr.handle;
+ dev_dbg(cxlds->dev, "Event log '%d': Clearing %u\n",
+ log, le16_to_cpu(payload.handle[i]));
+
+ if (i == max_handles) {
+ payload.nr_recs = i;
+ rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+ if (rc)
+ return rc;
+ i = 0;
+ }
+ }
+
+ /* Clear what is left if any */
+ if (i) {
+ payload.nr_recs = i;
+ mbox_cmd.size_in = CXL_CLEAR_EVENT_PL_SIZE(i);
+ rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static void cxl_mem_get_records_log(struct cxl_dev_state *cxlds,
+ enum cxl_event_log_type type)
+{
+ struct cxl_get_event_payload *payload;
+ struct cxl_mbox_cmd mbox_cmd;
+ u8 log_type = type;
+ u16 nr_rec;
+
+ mutex_lock(&cxlds->event.log_lock);
+ payload = cxlds->event.buf;
+
+ mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
+ .payload_in = &log_type,
+ .size_in = sizeof(log_type),
+ .payload_out = payload,
+ .size_out = cxlds->payload_size,
+ .min_out = struct_size(payload, records, 0),
+ };
+
+ do {
+ int rc, i;
+
+ rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+ if (rc) {
+ dev_err_ratelimited(cxlds->dev, "Event log '%d': Failed to query event records : %d",
+ type, rc);
+ break;
+ }
+
+ nr_rec = le16_to_cpu(payload->record_count);
+ if (!nr_rec)
+ break;
+
+ for (i = 0; i < nr_rec; i++)
+ trace_cxl_generic_event(cxlds->dev, type,
+ &payload->records[i]);
+
+ if (payload->flags & CXL_GET_EVENT_FLAG_OVERFLOW)
+ trace_cxl_overflow(cxlds->dev, type, payload);
+
+ rc = cxl_clear_event_record(cxlds, type, payload);
+ if (rc) {
+ dev_err_ratelimited(cxlds->dev, "Event log '%d': Failed to clear events : %d",
+ type, rc);
+ break;
+ }
+ } while (nr_rec);
+
+ mutex_unlock(&cxlds->event.log_lock);
+}
+
+/**
+ * cxl_mem_get_event_records - Get Event Records from the device
+ * @cxlds: The device data for the operation
+ *
+ * Retrieve all event records available on the device, report them as trace
+ * events, and clear them.
+ *
+ * See CXL rev 3.0 @8.2.9.2.2 Get Event Records
+ * See CXL rev 3.0 @8.2.9.2.3 Clear Event Records
+ */
+void cxl_mem_get_event_records(struct cxl_dev_state *cxlds, u32 status)
+{
+ dev_dbg(cxlds->dev, "Reading event logs: %x\n", status);
+
+ if (status & CXLDEV_EVENT_STATUS_FATAL)
+ cxl_mem_get_records_log(cxlds, CXL_EVENT_TYPE_FATAL);
+ if (status & CXLDEV_EVENT_STATUS_FAIL)
+ cxl_mem_get_records_log(cxlds, CXL_EVENT_TYPE_FAIL);
+ if (status & CXLDEV_EVENT_STATUS_WARN)
+ cxl_mem_get_records_log(cxlds, CXL_EVENT_TYPE_WARN);
+ if (status & CXLDEV_EVENT_STATUS_INFO)
+ cxl_mem_get_records_log(cxlds, CXL_EVENT_TYPE_INFO);
+}
+EXPORT_SYMBOL_NS_GPL(cxl_mem_get_event_records, CXL);
+
/**
* cxl_mem_get_partition_info - Get partition info
* @cxlds: The device data for the operation
@@ -868,6 +1004,7 @@ struct cxl_dev_state *cxl_dev_state_create(struct device *dev)
}
mutex_init(&cxlds->mbox_mutex);
+ mutex_init(&cxlds->event.log_lock);
cxlds->dev = dev;
return cxlds;
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index 20ca2fe2ca8e..6898212fcb47 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -6,7 +6,9 @@
#if !defined(_CXL_EVENTS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _CXL_EVENTS_H
+#include <asm-generic/unaligned.h>
#include <cxl.h>
+#include <cxlmem.h>
#include <linux/tracepoint.h>
#define CXL_RAS_UC_CACHE_DATA_PARITY BIT(0)
@@ -103,6 +105,124 @@ TRACE_EVENT(cxl_aer_correctable_error,
)
);
+#include <linux/tracepoint.h>
+
+#define cxl_event_log_type_str(type) \
+ __print_symbolic(type, \
+ { CXL_EVENT_TYPE_INFO, "Informational" }, \
+ { CXL_EVENT_TYPE_WARN, "Warning" }, \
+ { CXL_EVENT_TYPE_FAIL, "Failure" }, \
+ { CXL_EVENT_TYPE_FATAL, "Fatal" })
+
+TRACE_EVENT(cxl_overflow,
+
+ TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+ struct cxl_get_event_payload *payload),
+
+ TP_ARGS(dev, log, payload),
+
+ TP_STRUCT__entry(
+ __string(dev_name, dev_name(dev))
+ __field(int, log)
+ __field(u64, first_ts)
+ __field(u64, last_ts)
+ __field(u16, count)
+ ),
+
+ TP_fast_assign(
+ __assign_str(dev_name, dev_name(dev));
+ __entry->log = log;
+ __entry->count = le16_to_cpu(payload->overflow_err_count);
+ __entry->first_ts = le64_to_cpu(payload->first_overflow_timestamp);
+ __entry->last_ts = le64_to_cpu(payload->last_overflow_timestamp);
+ ),
+
+ TP_printk("%s: log=%s : %u records from %llu to %llu",
+ __get_str(dev_name), cxl_event_log_type_str(__entry->log),
+ __entry->count, __entry->first_ts, __entry->last_ts)
+
+);
+
+/*
+ * Common Event Record Format
+ * CXL 3.0 section 8.2.9.2.1; Table 8-42
+ */
+#define CXL_EVENT_RECORD_FLAG_PERMANENT BIT(2)
+#define CXL_EVENT_RECORD_FLAG_MAINT_NEEDED BIT(3)
+#define CXL_EVENT_RECORD_FLAG_PERF_DEGRADED BIT(4)
+#define CXL_EVENT_RECORD_FLAG_HW_REPLACE BIT(5)
+#define show_hdr_flags(flags) __print_flags(flags, " | ", \
+ { CXL_EVENT_RECORD_FLAG_PERMANENT, "PERMANENT_CONDITION" }, \
+ { CXL_EVENT_RECORD_FLAG_MAINT_NEEDED, "MAINTENANCE_NEEDED" }, \
+ { CXL_EVENT_RECORD_FLAG_PERF_DEGRADED, "PERFORMANCE_DEGRADED" }, \
+ { CXL_EVENT_RECORD_FLAG_HW_REPLACE, "HARDWARE_REPLACEMENT_NEEDED" } \
+)
+
+/*
+ * Define macros for the common header of each CXL event.
+ *
+ * Tracepoints using these macros must do 3 things:
+ *
+ * 1) Add CXL_EVT_TP_entry to TP_STRUCT__entry
+ * 2) Use CXL_EVT_TP_fast_assign within TP_fast_assign;
+ * pass the dev, log, and CXL event header
+ * 3) Use CXL_EVT_TP_printk() instead of TP_printk()
+ *
+ * See the generic_event tracepoint as an example.
+ */
+#define CXL_EVT_TP_entry \
+ __string(dev_name, dev_name(dev)) \
+ __field(int, log) \
+ __field_struct(uuid_t, hdr_uuid) \
+ __field(u32, hdr_flags) \
+ __field(u16, hdr_handle) \
+ __field(u16, hdr_related_handle) \
+ __field(u64, hdr_timestamp) \
+ __field(u8, hdr_length) \
+ __field(u8, hdr_maint_op_class)
+
+#define CXL_EVT_TP_fast_assign(dev, l, hdr) \
+ __assign_str(dev_name, dev_name(dev)); \
+ __entry->log = (l); \
+ memcpy(&__entry->hdr_uuid, &(hdr).id, sizeof(uuid_t)); \
+ __entry->hdr_length = (hdr).length; \
+ __entry->hdr_flags = get_unaligned_le24((hdr).flags); \
+ __entry->hdr_handle = le16_to_cpu((hdr).handle); \
+ __entry->hdr_related_handle = le16_to_cpu((hdr).related_handle); \
+ __entry->hdr_timestamp = le64_to_cpu((hdr).timestamp); \
+ __entry->hdr_maint_op_class = (hdr).maint_op_class
+
+#define CXL_EVT_TP_printk(fmt, ...) \
+ TP_printk("%s log=%s : time=%llu uuid=%pUb len=%d flags='%s' " \
+ "handle=%x related_handle=%x maint_op_class=%u" \
+ " : " fmt, \
+ __get_str(dev_name), cxl_event_log_type_str(__entry->log), \
+ __entry->hdr_timestamp, &__entry->hdr_uuid, __entry->hdr_length,\
+ show_hdr_flags(__entry->hdr_flags), __entry->hdr_handle, \
+ __entry->hdr_related_handle, __entry->hdr_maint_op_class, \
+ ##__VA_ARGS__)
+
+TRACE_EVENT(cxl_generic_event,
+
+ TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+ struct cxl_event_record_raw *rec),
+
+ TP_ARGS(dev, log, rec),
+
+ TP_STRUCT__entry(
+ CXL_EVT_TP_entry
+ __array(u8, data, CXL_EVENT_RECORD_DATA_LENGTH)
+ ),
+
+ TP_fast_assign(
+ CXL_EVT_TP_fast_assign(dev, log, rec->hdr);
+ memcpy(__entry->data, &rec->data, CXL_EVENT_RECORD_DATA_LENGTH);
+ ),
+
+ CXL_EVT_TP_printk("%s",
+ __print_hex(__entry->data, CXL_EVENT_RECORD_DATA_LENGTH))
+);
+
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index aa3af3bb73b2..5974d1082210 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -156,6 +156,18 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
#define CXLDEV_CAP_CAP_ID_SECONDARY_MAILBOX 0x3
#define CXLDEV_CAP_CAP_ID_MEMDEV 0x4000
+/* CXL 3.0 8.2.8.3.1 Event Status Register */
+#define CXLDEV_DEV_EVENT_STATUS_OFFSET 0x00
+#define CXLDEV_EVENT_STATUS_INFO BIT(0)
+#define CXLDEV_EVENT_STATUS_WARN BIT(1)
+#define CXLDEV_EVENT_STATUS_FAIL BIT(2)
+#define CXLDEV_EVENT_STATUS_FATAL BIT(3)
+
+#define CXLDEV_EVENT_STATUS_ALL (CXLDEV_EVENT_STATUS_INFO | \
+ CXLDEV_EVENT_STATUS_WARN | \
+ CXLDEV_EVENT_STATUS_FAIL | \
+ CXLDEV_EVENT_STATUS_FATAL)
+
/* CXL 2.0 8.2.8.4 Mailbox Registers */
#define CXLDEV_MBOX_CAPS_OFFSET 0x00
#define CXLDEV_MBOX_CAP_PAYLOAD_SIZE_MASK GENMASK(4, 0)
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index ab138004f644..e0450b2a0f3f 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -4,6 +4,7 @@
#define __CXL_MEM_H__
#include <uapi/linux/cxl_mem.h>
#include <linux/cdev.h>
+#include <linux/uuid.h>
#include "cxl.h"
/* CXL 2.0 8.2.8.5.1.1 Memory Device Status Register */
@@ -193,6 +194,17 @@ struct cxl_endpoint_dvsec_info {
struct range dvsec_range[2];
};
+/**
+ * struct cxl_event_state - Event log driver state
+ *
+ * @event_buf: Buffer to receive event data
+ * @event_log_lock: Serialize event_buf and log use
+ */
+struct cxl_event_state {
+ struct cxl_get_event_payload *buf;
+ struct mutex log_lock;
+};
+
/**
* struct cxl_dev_state - The driver device state
*
@@ -266,12 +278,16 @@ struct cxl_dev_state {
struct xarray doe_mbs;
+ struct cxl_event_state event;
+
int (*mbox_send)(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd);
};
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_FW_INFO = 0x0200,
CXL_MBOX_OP_ACTIVATE_FW = 0x0202,
CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400,
@@ -347,6 +363,75 @@ struct cxl_mbox_identify {
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
+ */
+#define CXL_CLEAR_EVENT_MAX_HANDLES (0xff)
+struct cxl_mbox_clear_event_payload {
+ u8 event_log; /* enum cxl_event_log_type */
+ u8 clear_flags;
+ u8 nr_recs;
+ u8 reserved[3];
+ __le16 handle[CXL_CLEAR_EVENT_MAX_HANDLES];
+} __packed;
+#define CXL_CLEAR_EVENT_LIMIT_HANDLES(payload_size) \
+ (((payload_size) - \
+ offsetof(struct cxl_mbox_clear_event_payload, handle)) / \
+ sizeof(__le16))
+#define CXL_CLEAR_EVENT_PL_SIZE(nr_handles) \
+ (offsetof(struct cxl_mbox_clear_event_payload, handle) + \
+ (nr_handles * sizeof(__le16)))
+
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
@@ -441,6 +526,7 @@ int cxl_mem_create_range_info(struct cxl_dev_state *cxlds);
struct cxl_dev_state *cxl_dev_state_create(struct device *dev);
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);
#ifdef CONFIG_CXL_SUSPEND
void cxl_mem_active_inc(void);
void cxl_mem_active_dec(void);
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 3a66aadb4df0..a2d8382bc593 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -417,8 +417,37 @@ static void disable_aer(void *pdev)
pci_disable_pcie_error_reporting(pdev);
}
+static void cxl_mem_free_event_buffer(void *buf)
+{
+ kvfree(buf);
+}
+
+/*
+ * There is a single buffer for reading event logs from the mailbox. All logs
+ * share this buffer protected by the cxlds->event_log_lock.
+ */
+static int cxl_mem_alloc_event_buf(struct cxl_dev_state *cxlds)
+{
+ struct cxl_get_event_payload *buf;
+
+ dev_dbg(cxlds->dev, "Allocating event buffer size %zu\n",
+ cxlds->payload_size);
+
+ buf = kvmalloc(cxlds->payload_size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ if (devm_add_action_or_reset(cxlds->dev, cxl_mem_free_event_buffer,
+ buf))
+ return -ENOMEM;
+
+ cxlds->event.buf = buf;
+ return 0;
+}
+
static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
+ struct pci_host_bridge *host_bridge = pci_find_host_bridge(pdev->bus);
struct cxl_register_map map;
struct cxl_memdev *cxlmd;
struct cxl_dev_state *cxlds;
@@ -494,6 +523,17 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
+ rc = cxl_mem_alloc_event_buf(cxlds);
+ if (rc)
+ return rc;
+
+ /*
+ * When BIOS maintains CXL error reporting control, it will process
+ * event records. Only one agent can do so.
+ */
+ if (host_bridge->native_cxl_error)
+ cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL);
+
if (cxlds->regs.ras) {
pci_enable_pcie_error_reporting(pdev);
rc = devm_add_action_or_reset(&pdev->dev, disable_aer, pdev);
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load
2023-01-09 19:42 ` [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load Ira Weiny
@ 2023-01-13 12:22 ` Jonathan Cameron
2023-01-18 1:03 ` Ira Weiny
0 siblings, 1 reply; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 12:22 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023 11:42:20 -0800
Ira Weiny <ira.weiny@intel.com> wrote:
> CXL devices have multiple event logs which can be queried for CXL event
> records. Devices are required to support the storage of at least one
> event record in each event log type.
>
> Devices track event log overflow by incrementing a counter and tracking
> the time of the first and last overflow event seen.
>
> Software queries events via the Get Event Record mailbox command; CXL
> rev 3.0 section 8.2.9.2.2 and clears events via CXL rev 3.0 section
> 8.2.9.2.3 Clear Event Records mailbox command.
>
> If the result of negotiating CXL Error Reporting Control is OS control,
> read and clear all event logs on driver load.
>
> Ensure a clean slate of events by reading and clearing the events on
> driver load.
>
> The status register is not used because a device may continue to trigger
> events and the only requirement is to empty the log at least once. This
> allows for the required transition from empty to non-empty for interrupt
> generation. Handling of interrupts is in a follow on patch.
>
> The device can return up to 1MB worth of event records per query.
> Allocate a shared large buffer to handle the max number of records based
> on the mailbox payload size.
>
> This patch traces a raw event record and leaves specific event record
> type tracing to subsequent patches. Macros are created to aid in
> tracing the common CXL Event header fields.
>
> Each record is cleared explicitly. A clear all bit is specified but is
> only valid when the log overflows.
>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
A few trivial comments inline, but whether you act on them or not lookjs
good to me.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
>
> ---
> Changes from V4:
> Jonathan/Johnny
> Clear limit mailbox size based on nr records
> Jonathan
> Use offsetof() in CXL_CLEAR_EVENT_LIMIT_HANDLES()
> ---
> drivers/cxl/core/mbox.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++
> drivers/cxl/core/trace.h | 120 +++++++++++++++++++++++++++++++++++++++++
> drivers/cxl/cxl.h | 12 +++++
> drivers/cxl/cxlmem.h | 86 +++++++++++++++++++++++++++++
> drivers/cxl/pci.c | 40 ++++++++++++++
> 5 files changed, 395 insertions(+)
>
> diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
> index b03fba212799..5ad4716f2e11 100644
> --- a/drivers/cxl/core/mbox.c
> +++ b/drivers/cxl/core/mbox.c
...
> +static void cxl_mem_get_records_log(struct cxl_dev_state *cxlds,
> + enum cxl_event_log_type type)
> +{
> + struct cxl_get_event_payload *payload;
> + struct cxl_mbox_cmd mbox_cmd;
> + u8 log_type = type;
> + u16 nr_rec;
> +
> + mutex_lock(&cxlds->event.log_lock);
> + payload = cxlds->event.buf;
> +
> + mbox_cmd = (struct cxl_mbox_cmd) {
> + .opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
> + .payload_in = &log_type,
> + .size_in = sizeof(log_type),
> + .payload_out = payload,
> + .size_out = cxlds->payload_size,
> + .min_out = struct_size(payload, records, 0),
> + };
> +
> + do {
> + int rc, i;
> +
> + rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
> + if (rc) {
> + dev_err_ratelimited(cxlds->dev, "Event log '%d': Failed to query event records : %d",
Might as well have slightly shorter line by adding a break after dev,
Same with other case below. If nothing else it will reduce bot warnings slightly I think.
> + type, rc);
> + break;
> + }
> +
> + nr_rec = le16_to_cpu(payload->record_count);
> + if (!nr_rec)
> + break;
> +
> + for (i = 0; i < nr_rec; i++)
> + trace_cxl_generic_event(cxlds->dev, type,
> + &payload->records[i]);
> +
> + if (payload->flags & CXL_GET_EVENT_FLAG_OVERFLOW)
> + trace_cxl_overflow(cxlds->dev, type, payload);
> +
> + rc = cxl_clear_event_record(cxlds, type, payload);
> + if (rc) {
> + dev_err_ratelimited(cxlds->dev, "Event log '%d': Failed to clear events : %d",
> + type, rc);
> + break;
> + }
> + } while (nr_rec);
...
> diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
> index ab138004f644..e0450b2a0f3f 100644
> --- a/drivers/cxl/cxlmem.h
> +++ b/drivers/cxl/cxlmem.h
...
> +/*
> + * 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;
Mostly to avoid ugly casts in patch 3, I would consider
a union of all the defined record types. That way you could
just pick the right one based on a uuid match and keep type
safety etc.
> +
> +/*
> + * 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
> + */
> +#define CXL_CLEAR_EVENT_MAX_HANDLES (0xff)
> +struct cxl_mbox_clear_event_payload {
> + u8 event_log; /* enum cxl_event_log_type */
> + u8 clear_flags;
> + u8 nr_recs;
> + u8 reserved[3];
> + __le16 handle[CXL_CLEAR_EVENT_MAX_HANDLES];
> +} __packed;
> +#define CXL_CLEAR_EVENT_LIMIT_HANDLES(payload_size) \
> + (((payload_size) - \
> + offsetof(struct cxl_mbox_clear_event_payload, handle)) / \
> + sizeof(__le16))
> +#define CXL_CLEAR_EVENT_PL_SIZE(nr_handles) \
> + (offsetof(struct cxl_mbox_clear_event_payload, handle) + \
> + (nr_handles * sizeof(__le16)))
> +
Still ugly, but I guess I can live with it though it's a bit of
large structure to put on the stack and if you used the heap then
a simple struct_size() allocation and having a variable length
array for last element would make this neater.
> diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
> index 3a66aadb4df0..a2d8382bc593 100644
> --- a/drivers/cxl/pci.c
> +++ b/drivers/cxl/pci.c
> @@ -417,8 +417,37 @@ static void disable_aer(void *pdev)
> pci_disable_pcie_error_reporting(pdev);
> }
>
> +static void cxl_mem_free_event_buffer(void *buf)
> +{
> + kvfree(buf);
> +}
> +
> +/*
> + * There is a single buffer for reading event logs from the mailbox. All logs
> + * share this buffer protected by the cxlds->event_log_lock.
> + */
> +static int cxl_mem_alloc_event_buf(struct cxl_dev_state *cxlds)
> +{
> + struct cxl_get_event_payload *buf;
> +
> + dev_dbg(cxlds->dev, "Allocating event buffer size %zu\n",
> + cxlds->payload_size);
> +
> + buf = kvmalloc(cxlds->payload_size, GFP_KERNEL);
> + if (!buf)
> + return -ENOMEM;
> +
> + if (devm_add_action_or_reset(cxlds->dev, cxl_mem_free_event_buffer,
> + buf))
> + return -ENOMEM;
trivial:
Should return the error code from devm_add_action_or_reset.
Sure it's always -ENOMEM today, but it might not be in future ;)
> +
> + cxlds->event.buf = buf;
> + return 0;
> +}
> +
> static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> {
> + struct pci_host_bridge *host_bridge = pci_find_host_bridge(pdev->bus);
> struct cxl_register_map map;
> struct cxl_memdev *cxlmd;
> struct cxl_dev_state *cxlds;
> @@ -494,6 +523,17 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> if (IS_ERR(cxlmd))
> return PTR_ERR(cxlmd);
>
> + rc = cxl_mem_alloc_event_buf(cxlds);
I'm in two minds about this. For current support, makes little sense to have
this unless host_bridge->native_cxl_error is true, but then we'll end up moving
it for DCD.
On balance I'd rather today's code made sense and we had to modify a bit more when
adding DCD support though, so better to move it under the if below.
(unless I'm missing something of course!)
> + if (rc)
> + return rc;
> +
> + /*
> + * When BIOS maintains CXL error reporting control, it will process
> + * event records. Only one agent can do so.
> + */
> + if (host_bridge->native_cxl_error)
> + cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL);
> +
> if (cxlds->regs.ras) {
> pci_enable_pcie_error_reporting(pdev);
> rc = devm_add_action_or_reset(&pdev->dev, disable_aer, pdev);
>
^ permalink raw reply [flat|nested] 20+ messages in thread* Re: [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load
2023-01-13 12:22 ` Jonathan Cameron
@ 2023-01-18 1:03 ` Ira Weiny
0 siblings, 0 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-18 1:03 UTC (permalink / raw)
To: Jonathan Cameron, Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
Jonathan Cameron wrote:
> On Mon, 09 Jan 2023 11:42:20 -0800
> Ira Weiny <ira.weiny@intel.com> wrote:
>
> > CXL devices have multiple event logs which can be queried for CXL event
> > records. Devices are required to support the storage of at least one
> > event record in each event log type.
> >
> > Devices track event log overflow by incrementing a counter and tracking
> > the time of the first and last overflow event seen.
> >
> > Software queries events via the Get Event Record mailbox command; CXL
> > rev 3.0 section 8.2.9.2.2 and clears events via CXL rev 3.0 section
> > 8.2.9.2.3 Clear Event Records mailbox command.
> >
> > If the result of negotiating CXL Error Reporting Control is OS control,
> > read and clear all event logs on driver load.
> >
> > Ensure a clean slate of events by reading and clearing the events on
> > driver load.
> >
> > The status register is not used because a device may continue to trigger
> > events and the only requirement is to empty the log at least once. This
> > allows for the required transition from empty to non-empty for interrupt
> > generation. Handling of interrupts is in a follow on patch.
> >
> > The device can return up to 1MB worth of event records per query.
> > Allocate a shared large buffer to handle the max number of records based
> > on the mailbox payload size.
> >
> > This patch traces a raw event record and leaves specific event record
> > type tracing to subsequent patches. Macros are created to aid in
> > tracing the common CXL Event header fields.
> >
> > Each record is cleared explicitly. A clear all bit is specified but is
> > only valid when the log overflows.
> >
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> A few trivial comments inline, but whether you act on them or not lookjs
> good to me.
>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
>
I poked Dan about these comments. He agreed with you about the dynamic
struct. So thanks for the review and I'll pick it up. More responses
below.
>
> > +static void cxl_mem_get_records_log(struct cxl_dev_state *cxlds,
> > + enum cxl_event_log_type type)
> > +{
> > + struct cxl_get_event_payload *payload;
> > + struct cxl_mbox_cmd mbox_cmd;
> > + u8 log_type = type;
> > + u16 nr_rec;
> > +
> > + mutex_lock(&cxlds->event.log_lock);
> > + payload = cxlds->event.buf;
> > +
> > + mbox_cmd = (struct cxl_mbox_cmd) {
> > + .opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
> > + .payload_in = &log_type,
> > + .size_in = sizeof(log_type),
> > + .payload_out = payload,
> > + .size_out = cxlds->payload_size,
> > + .min_out = struct_size(payload, records, 0),
> > + };
> > +
> > + do {
> > + int rc, i;
> > +
> > + rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
> > + if (rc) {
> > + dev_err_ratelimited(cxlds->dev, "Event log '%d': Failed to query event records : %d",
>
> Might as well have slightly shorter line by adding a break after dev,
> Same with other case below. If nothing else it will reduce bot warnings slightly I think.
Sure since I'm respining.
[snip]
>
> > +/*
> > + * 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;
>
> Mostly to avoid ugly casts in patch 3, I would consider
> a union of all the defined record types. That way you could
> just pick the right one based on a uuid match and keep type
> safety etc.
Each of the trace points dump information from the common header.
So I don't think this is worth the effort of adding another pointer into
the trace point for the other structures.
I'm going to accept your review on this one if that is ok.
>
> > +
> > +/*
> > + * 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
> > + */
> > +#define CXL_CLEAR_EVENT_MAX_HANDLES (0xff)
> > +struct cxl_mbox_clear_event_payload {
> > + u8 event_log; /* enum cxl_event_log_type */
> > + u8 clear_flags;
> > + u8 nr_recs;
> > + u8 reserved[3];
> > + __le16 handle[CXL_CLEAR_EVENT_MAX_HANDLES];
> > +} __packed;
> > +#define CXL_CLEAR_EVENT_LIMIT_HANDLES(payload_size) \
> > + (((payload_size) - \
> > + offsetof(struct cxl_mbox_clear_event_payload, handle)) / \
> > + sizeof(__le16))
> > +#define CXL_CLEAR_EVENT_PL_SIZE(nr_handles) \
> > + (offsetof(struct cxl_mbox_clear_event_payload, handle) + \
> > + (nr_handles * sizeof(__le16)))
> > +
>
> Still ugly, but I guess I can live with it though it's a bit of
> large structure to put on the stack and if you used the heap then
> a simple struct_size() allocation and having a variable length
> array for last element would make this neater.
>
Ok I'm going to change this but I think the code will still be 'ugly'.
But Dan's justification was that the spec defines what looks like a
dynamic struct and it will be easier to follow if this structure is
defined that way as well. Even though the handles are limited by nr_recs.
>
>
> > diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
> > index 3a66aadb4df0..a2d8382bc593 100644
> > --- a/drivers/cxl/pci.c
> > +++ b/drivers/cxl/pci.c
> > @@ -417,8 +417,37 @@ static void disable_aer(void *pdev)
> > pci_disable_pcie_error_reporting(pdev);
> > }
> >
> > +static void cxl_mem_free_event_buffer(void *buf)
> > +{
> > + kvfree(buf);
> > +}
> > +
> > +/*
> > + * There is a single buffer for reading event logs from the mailbox. All logs
> > + * share this buffer protected by the cxlds->event_log_lock.
> > + */
> > +static int cxl_mem_alloc_event_buf(struct cxl_dev_state *cxlds)
> > +{
> > + struct cxl_get_event_payload *buf;
> > +
> > + dev_dbg(cxlds->dev, "Allocating event buffer size %zu\n",
> > + cxlds->payload_size);
> > +
> > + buf = kvmalloc(cxlds->payload_size, GFP_KERNEL);
> > + if (!buf)
> > + return -ENOMEM;
> > +
> > + if (devm_add_action_or_reset(cxlds->dev, cxl_mem_free_event_buffer,
> > + buf))
> > + return -ENOMEM;
> trivial:
>
> Should return the error code from devm_add_action_or_reset.
> Sure it's always -ENOMEM today, but it might not be in future ;)
Done.
>
> > +
> > + cxlds->event.buf = buf;
> > + return 0;
> > +}
> > +
> > static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> > {
> > + struct pci_host_bridge *host_bridge = pci_find_host_bridge(pdev->bus);
> > struct cxl_register_map map;
> > struct cxl_memdev *cxlmd;
> > struct cxl_dev_state *cxlds;
> > @@ -494,6 +523,17 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> > if (IS_ERR(cxlmd))
> > return PTR_ERR(cxlmd);
> >
> > + rc = cxl_mem_alloc_event_buf(cxlds);
>
> I'm in two minds about this. For current support, makes little sense to have
> this unless host_bridge->native_cxl_error is true, but then we'll end up moving
> it for DCD.
>
> On balance I'd rather today's code made sense and we had to modify a bit more when
> adding DCD support though, so better to move it under the if below.
> (unless I'm missing something of course!)
I really want to say that Dan told me to just allocate the buffer all the
time in a previous review. But I've not found it ATM.
Ira
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 2/8] cxl/mem: Wire up event interrupts
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
2023-01-09 19:42 ` [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load Ira Weiny
@ 2023-01-09 19:42 ` ira.weiny
2023-01-13 12:28 ` Jonathan Cameron
2023-01-09 19:42 ` [PATCH v6 3/8] cxl/mem: Trace General Media Event Record Ira Weiny
` (5 subsequent siblings)
7 siblings, 1 reply; 20+ messages in thread
From: ira.weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl,
Bjorn Helgaas
From: Davidlohr Bueso <dave@stgolabs.net>
Currently the only CXL features targeted for irq support require their
message numbers to be within the first 16 entries. The device may
however support less than 16 entries depending on the support it
provides.
Attempt to allocate these 16 irq vectors. If the device supports less
then the PCI infrastructure will allocate that number. Upon successful
allocation, users can plug in their respective isr at any point
thereafter.
CXL device events are signaled via interrupts. Each event log may have
a different interrupt message number. These message numbers are
reported in the Get Event Interrupt Policy mailbox command.
Add interrupt support for event logs. Interrupts are allocated as
shared interrupts. Therefore, all or some event logs can share the same
message number.
In addition all logs are queried on any interrupt in order of the most
to least severe based on the status register.
Finally place all event configuration logic into cxl_event_config().
Previously the logic was a simple 'read all' on start up. But
interrupts must be configured prior to any reads to ensure no events are
missed. A single event configuration function results in a cleaner over
all implementation.
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Co-developed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
Changes from V5:
Dan
Addressed missed comments on V4
https://lore.kernel.org/all/6398dd6ed80fa_b05d1294fc@dwillia2-xfh.jf.intel.com.notmuch/
---
drivers/cxl/cxl.h | 4 +
drivers/cxl/cxlmem.h | 19 +++++
drivers/cxl/cxlpci.h | 6 ++
drivers/cxl/pci.c | 213 +++++++++++++++++++++++++++++++++++++++++++++++++--
4 files changed, 236 insertions(+), 6 deletions(-)
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index 5974d1082210..b3964149c77b 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -168,6 +168,10 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
CXLDEV_EVENT_STATUS_FAIL | \
CXLDEV_EVENT_STATUS_FATAL)
+/* CXL rev 3.0 section 8.2.9.2.4; Table 8-52 */
+#define CXLDEV_EVENT_INT_MODE_MASK GENMASK(1, 0)
+#define CXLDEV_EVENT_INT_MSGNUM_MASK GENMASK(7, 4)
+
/* CXL 2.0 8.2.8.4 Mailbox Registers */
#define CXLDEV_MBOX_CAPS_OFFSET 0x00
#define CXLDEV_MBOX_CAP_PAYLOAD_SIZE_MASK GENMASK(4, 0)
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index e0450b2a0f3f..e6b27e5d5009 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -194,6 +194,23 @@ struct cxl_endpoint_dvsec_info {
struct range dvsec_range[2];
};
+/**
+ * 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
*
@@ -288,6 +305,8 @@ enum cxl_opcode {
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_ACTIVATE_FW = 0x0202,
CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400,
diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h
index 77dbdb980b12..a8ea04f536ab 100644
--- a/drivers/cxl/cxlpci.h
+++ b/drivers/cxl/cxlpci.h
@@ -53,6 +53,12 @@
#define CXL_DVSEC_REG_LOCATOR_BLOCK_ID_MASK GENMASK(15, 8)
#define CXL_DVSEC_REG_LOCATOR_BLOCK_OFF_LOW_MASK GENMASK(31, 16)
+/*
+ * NOTE: Currently all the functions which are enabled for CXL require their
+ * vectors to be in the first 16. Use this as the default max.
+ */
+#define CXL_PCI_DEFAULT_MAX_VECTORS 16
+
/* Register Block Identifier (RBI) */
enum cxl_regloc_type {
CXL_REGLOC_RBI_EMPTY = 0,
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index a2d8382bc593..9e83f6b0ba26 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -445,6 +445,205 @@ static int cxl_mem_alloc_event_buf(struct cxl_dev_state *cxlds)
return 0;
}
+static int cxl_alloc_irq_vectors(struct pci_dev *pdev)
+{
+ int nvecs;
+
+ /*
+ * Per CXL 3.0 3.1.1 CXL.io Endpoint a function on a CXL device must
+ * not generate INTx messages if that function participates in
+ * CXL.cache or CXL.mem.
+ *
+ * Additionally pci_alloc_irq_vectors() handles calling
+ * pci_free_irq_vectors() automatically despite not being called
+ * pcim_*. See pci_setup_msi_context().
+ */
+ nvecs = pci_alloc_irq_vectors(pdev, 1, CXL_PCI_DEFAULT_MAX_VECTORS,
+ PCI_IRQ_MSIX | PCI_IRQ_MSI);
+ if (nvecs < 1) {
+ dev_dbg(&pdev->dev, "Failed to alloc irq vectors: %d\n", nvecs);
+ return -ENXIO;
+ }
+ return 0;
+}
+
+struct cxl_dev_id {
+ struct cxl_dev_state *cxlds;
+};
+
+static irqreturn_t cxl_event_thread(int irq, void *id)
+{
+ struct cxl_dev_id *dev_id = id;
+ struct cxl_dev_state *cxlds = dev_id->cxlds;
+ u32 status;
+
+ do {
+ /*
+ * CXL 3.0 8.2.8.3.1: The lower 32 bits are the status;
+ * ignore the reserved upper 32 bits
+ */
+ status = readl(cxlds->regs.status + CXLDEV_DEV_EVENT_STATUS_OFFSET);
+ /* Ignore logs unknown to the driver */
+ status &= CXLDEV_EVENT_STATUS_ALL;
+ if (!status)
+ break;
+ cxl_mem_get_event_records(cxlds, status);
+ cond_resched();
+ } while (status);
+
+ return IRQ_HANDLED;
+}
+
+static int cxl_event_req_irq(struct cxl_dev_state *cxlds, u8 setting)
+{
+ struct device *dev = cxlds->dev;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct cxl_dev_id *dev_id;
+ int irq;
+
+ if (FIELD_GET(CXLDEV_EVENT_INT_MODE_MASK, setting) != CXL_INT_MSI_MSIX)
+ return -ENXIO;
+
+ /* dev_id must be globally unique and must contain the cxlds */
+ dev_id = devm_kzalloc(dev, sizeof(*dev_id), GFP_KERNEL);
+ if (!dev_id)
+ return -ENOMEM;
+ dev_id->cxlds = cxlds;
+
+ irq = pci_irq_vector(pdev,
+ FIELD_GET(CXLDEV_EVENT_INT_MSGNUM_MASK, setting));
+ if (irq < 0)
+ return irq;
+
+ return devm_request_threaded_irq(dev, irq, NULL, cxl_event_thread,
+ IRQF_SHARED, NULL, dev_id);
+}
+
+static int cxl_event_get_int_policy(struct cxl_dev_state *cxlds,
+ struct cxl_event_interrupt_policy *policy)
+{
+ struct cxl_mbox_cmd mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_GET_EVT_INT_POLICY,
+ .payload_out = policy,
+ .size_out = sizeof(*policy),
+ };
+ int rc;
+
+ rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+ if (rc < 0)
+ dev_err(cxlds->dev, "Failed to get event interrupt policy : %d",
+ rc);
+
+ return rc;
+}
+
+static int cxl_event_config_msgnums(struct cxl_dev_state *cxlds,
+ struct cxl_event_interrupt_policy *policy)
+{
+ struct cxl_mbox_cmd mbox_cmd;
+ int rc;
+
+ *policy = (struct cxl_event_interrupt_policy) {
+ .info_settings = CXL_INT_MSI_MSIX,
+ .warn_settings = CXL_INT_MSI_MSIX,
+ .failure_settings = CXL_INT_MSI_MSIX,
+ .fatal_settings = CXL_INT_MSI_MSIX,
+ };
+
+ mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_SET_EVT_INT_POLICY,
+ .payload_in = policy,
+ .size_in = sizeof(*policy),
+ };
+
+ rc = cxl_internal_send_cmd(cxlds, &mbox_cmd);
+ if (rc < 0) {
+ dev_err(cxlds->dev, "Failed to set event interrupt policy : %d",
+ rc);
+ return rc;
+ }
+
+ /* Retrieve final interrupt settings */
+ return cxl_event_get_int_policy(cxlds, policy);
+}
+
+static int cxl_event_irqsetup(struct cxl_dev_state *cxlds)
+{
+ struct cxl_event_interrupt_policy policy;
+ int rc;
+
+ rc = cxl_event_config_msgnums(cxlds, &policy);
+ if (rc)
+ return rc;
+
+ rc = cxl_event_req_irq(cxlds, policy.info_settings);
+ if (rc) {
+ dev_err(cxlds->dev, "Failed to get interrupt for event Info log\n");
+ return rc;
+ }
+
+ rc = cxl_event_req_irq(cxlds, policy.warn_settings);
+ if (rc) {
+ dev_err(cxlds->dev, "Failed to get interrupt for event Warn log\n");
+ return rc;
+ }
+
+ rc = cxl_event_req_irq(cxlds, policy.failure_settings);
+ if (rc) {
+ dev_err(cxlds->dev, "Failed to get interrupt for event Failure log\n");
+ return rc;
+ }
+
+ rc = cxl_event_req_irq(cxlds, policy.fatal_settings);
+ if (rc) {
+ dev_err(cxlds->dev, "Failed to get interrupt for event Fatal log\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static bool cxl_event_int_is_fw(u8 setting)
+{
+ u8 mode = FIELD_GET(CXLDEV_EVENT_INT_MODE_MASK, setting);
+
+ return mode == CXL_INT_FW;
+}
+
+static int cxl_event_config(struct pci_host_bridge *host_bridge,
+ struct cxl_dev_state *cxlds)
+{
+ struct cxl_event_interrupt_policy policy;
+ int rc;
+
+ /*
+ * When BIOS maintains CXL error reporting control, it will process
+ * event records. Only one agent can do so.
+ */
+ if (!host_bridge->native_cxl_error)
+ return 0;
+
+ rc = cxl_event_get_int_policy(cxlds, &policy);
+ if (rc)
+ return rc;
+
+ if (cxl_event_int_is_fw(policy.info_settings) ||
+ cxl_event_int_is_fw(policy.warn_settings) ||
+ cxl_event_int_is_fw(policy.failure_settings) ||
+ cxl_event_int_is_fw(policy.fatal_settings)) {
+ dev_err(cxlds->dev, "FW still in control of Event Logs despite _OSC settings\n");
+ return -EBUSY;
+ }
+
+ rc = cxl_event_irqsetup(cxlds);
+ if (rc)
+ return rc;
+
+ cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL);
+
+ return 0;
+}
+
static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct pci_host_bridge *host_bridge = pci_find_host_bridge(pdev->bus);
@@ -463,6 +662,7 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
rc = pcim_enable_device(pdev);
if (rc)
return rc;
+ pci_set_master(pdev);
cxlds = cxl_dev_state_create(&pdev->dev);
if (IS_ERR(cxlds))
@@ -519,6 +719,10 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
+ rc = cxl_alloc_irq_vectors(pdev);
+ if (rc)
+ return rc;
+
cxlmd = devm_cxl_add_memdev(cxlds);
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
@@ -527,12 +731,9 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
- /*
- * When BIOS maintains CXL error reporting control, it will process
- * event records. Only one agent can do so.
- */
- if (host_bridge->native_cxl_error)
- cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL);
+ rc = cxl_event_config(host_bridge, cxlds);
+ if (rc)
+ return rc;
if (cxlds->regs.ras) {
pci_enable_pcie_error_reporting(pdev);
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 2/8] cxl/mem: Wire up event interrupts
2023-01-09 19:42 ` [PATCH v6 2/8] cxl/mem: Wire up event interrupts ira.weiny
@ 2023-01-13 12:28 ` Jonathan Cameron
2023-01-13 21:45 ` Ira Weiny
0 siblings, 1 reply; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 12:28 UTC (permalink / raw)
To: ira.weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl, Bjorn Helgaas
On Mon, 09 Jan 2023 11:42:21 -0800
ira.weiny@intel.com wrote:
> From: Davidlohr Bueso <dave@stgolabs.net>
>
> Currently the only CXL features targeted for irq support require their
> message numbers to be within the first 16 entries. The device may
> however support less than 16 entries depending on the support it
> provides.
>
> Attempt to allocate these 16 irq vectors. If the device supports less
> then the PCI infrastructure will allocate that number. Upon successful
> allocation, users can plug in their respective isr at any point
> thereafter.
>
> CXL device events are signaled via interrupts. Each event log may have
> a different interrupt message number. These message numbers are
> reported in the Get Event Interrupt Policy mailbox command.
>
> Add interrupt support for event logs. Interrupts are allocated as
> shared interrupts. Therefore, all or some event logs can share the same
> message number.
>
> In addition all logs are queried on any interrupt in order of the most
> to least severe based on the status register.
>
> Finally place all event configuration logic into cxl_event_config().
> Previously the logic was a simple 'read all' on start up. But
> interrupts must be configured prior to any reads to ensure no events are
> missed. A single event configuration function results in a cleaner over
> all implementation.
>
> Cc: Bjorn Helgaas <helgaas@kernel.org>
> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Co-developed-by: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
>
> ---
> Changes from V5:
> Dan
> Addressed missed comments on V4
> https://lore.kernel.org/all/6398dd6ed80fa_b05d1294fc@dwillia2-xfh.jf.intel.com.notmuch/
You also added pci_set_master() :)
Which means I can now give
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
I only noticed because I couldn't remember why I'd not given a tag to v4.
Jonathan
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v6 2/8] cxl/mem: Wire up event interrupts
2023-01-13 12:28 ` Jonathan Cameron
@ 2023-01-13 21:45 ` Ira Weiny
0 siblings, 0 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-13 21:45 UTC (permalink / raw)
To: Jonathan Cameron
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl, Bjorn Helgaas
On Fri, Jan 13, 2023 at 12:28:45PM +0000, Jonathan Cameron wrote:
> On Mon, 09 Jan 2023 11:42:21 -0800
> ira.weiny@intel.com wrote:
>
> > From: Davidlohr Bueso <dave@stgolabs.net>
> >
> > Currently the only CXL features targeted for irq support require their
> > message numbers to be within the first 16 entries. The device may
> > however support less than 16 entries depending on the support it
> > provides.
> >
> > Attempt to allocate these 16 irq vectors. If the device supports less
> > then the PCI infrastructure will allocate that number. Upon successful
> > allocation, users can plug in their respective isr at any point
> > thereafter.
> >
> > CXL device events are signaled via interrupts. Each event log may have
> > a different interrupt message number. These message numbers are
> > reported in the Get Event Interrupt Policy mailbox command.
> >
> > Add interrupt support for event logs. Interrupts are allocated as
> > shared interrupts. Therefore, all or some event logs can share the same
> > message number.
> >
> > In addition all logs are queried on any interrupt in order of the most
> > to least severe based on the status register.
> >
> > Finally place all event configuration logic into cxl_event_config().
> > Previously the logic was a simple 'read all' on start up. But
> > interrupts must be configured prior to any reads to ensure no events are
> > missed. A single event configuration function results in a cleaner over
> > all implementation.
> >
> > Cc: Bjorn Helgaas <helgaas@kernel.org>
> > Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > Co-developed-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> > Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
>
> >
> > ---
> > Changes from V5:
> > Dan
> > Addressed missed comments on V4
> > https://lore.kernel.org/all/6398dd6ed80fa_b05d1294fc@dwillia2-xfh.jf.intel.com.notmuch/
>
> You also added pci_set_master() :)
<sigh> Yes I made the mistake of putting that note in another patch and then
when I fixed it up I dropped it from here.
>
> Which means I can now give
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Thanks!
>
> I only noticed because I couldn't remember why I'd not given a tag to v4.
Sorry I'm working on getting a better workflow.
Ira
>
> Jonathan
>
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 3/8] cxl/mem: Trace General Media Event Record
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
2023-01-09 19:42 ` [PATCH v6 1/8] cxl/mem: Read, trace, and clear events on driver load Ira Weiny
2023-01-09 19:42 ` [PATCH v6 2/8] cxl/mem: Wire up event interrupts ira.weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-13 12:34 ` Jonathan Cameron
2023-01-13 17:16 ` Davidlohr Bueso
2023-01-09 19:42 ` [PATCH v6 4/8] cxl/mem: Trace DRAM " Ira Weiny
` (4 subsequent siblings)
7 siblings, 2 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
CXL rev 3.0 section 8.2.9.2.1.1 defines the General Media Event Record.
Determine if the event read is a general media record and if so trace
the record as a General Media Event Record.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Pick up tag
---
drivers/cxl/core/mbox.c | 29 ++++++++++-
drivers/cxl/core/trace.h | 124 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/cxl/cxlmem.h | 19 ++++++++
3 files changed, 170 insertions(+), 2 deletions(-)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 5ad4716f2e11..0ece1766f613 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -718,6 +718,31 @@ int cxl_enumerate_cmds(struct cxl_dev_state *cxlds)
}
EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL);
+/*
+ * General Media Event Record
+ * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
+ */
+static const uuid_t gen_media_event_uuid =
+ UUID_INIT(0xfbcd0a77, 0xc260, 0x417f,
+ 0x85, 0xa9, 0x08, 0x8b, 0x16, 0x21, 0xeb, 0xa6);
+
+static void cxl_event_trace_record(const struct device *dev,
+ enum cxl_event_log_type type,
+ struct cxl_event_record_raw *record)
+{
+ uuid_t *id = &record->hdr.id;
+
+ if (uuid_equal(id, &gen_media_event_uuid)) {
+ struct cxl_event_gen_media *rec =
+ (struct cxl_event_gen_media *)record;
+
+ trace_cxl_general_media(dev, type, rec);
+ } else {
+ /* For unknown record types print just the header */
+ trace_cxl_generic_event(dev, type, record);
+ }
+}
+
static int cxl_clear_event_record(struct cxl_dev_state *cxlds,
enum cxl_event_log_type log,
struct cxl_get_event_payload *get_pl)
@@ -811,8 +836,8 @@ static void cxl_mem_get_records_log(struct cxl_dev_state *cxlds,
break;
for (i = 0; i < nr_rec; i++)
- trace_cxl_generic_event(cxlds->dev, type,
- &payload->records[i]);
+ cxl_event_trace_record(cxlds->dev, type,
+ &payload->records[i]);
if (payload->flags & CXL_GET_EVENT_FLAG_OVERFLOW)
trace_cxl_overflow(cxlds->dev, type, payload);
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index 6898212fcb47..d85f0481661d 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -223,6 +223,130 @@ TRACE_EVENT(cxl_generic_event,
__print_hex(__entry->data, CXL_EVENT_RECORD_DATA_LENGTH))
);
+/*
+ * Physical Address field masks
+ *
+ * General Media Event Record
+ * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
+ *
+ * DRAM Event Record
+ * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
+ */
+#define CXL_DPA_FLAGS_MASK 0x3F
+#define CXL_DPA_MASK (~CXL_DPA_FLAGS_MASK)
+
+#define CXL_DPA_VOLATILE BIT(0)
+#define CXL_DPA_NOT_REPAIRABLE BIT(1)
+#define show_dpa_flags(flags) __print_flags(flags, "|", \
+ { CXL_DPA_VOLATILE, "VOLATILE" }, \
+ { CXL_DPA_NOT_REPAIRABLE, "NOT_REPAIRABLE" } \
+)
+
+/*
+ * General Media Event Record - GMER
+ * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
+ */
+#define CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT BIT(0)
+#define CXL_GMER_EVT_DESC_THRESHOLD_EVENT BIT(1)
+#define CXL_GMER_EVT_DESC_POISON_LIST_OVERFLOW BIT(2)
+#define show_event_desc_flags(flags) __print_flags(flags, "|", \
+ { CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT, "UNCORRECTABLE_EVENT" }, \
+ { CXL_GMER_EVT_DESC_THRESHOLD_EVENT, "THRESHOLD_EVENT" }, \
+ { CXL_GMER_EVT_DESC_POISON_LIST_OVERFLOW, "POISON_LIST_OVERFLOW" } \
+)
+
+#define CXL_GMER_MEM_EVT_TYPE_ECC_ERROR 0x00
+#define CXL_GMER_MEM_EVT_TYPE_INV_ADDR 0x01
+#define CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR 0x02
+#define show_mem_event_type(type) __print_symbolic(type, \
+ { CXL_GMER_MEM_EVT_TYPE_ECC_ERROR, "ECC Error" }, \
+ { CXL_GMER_MEM_EVT_TYPE_INV_ADDR, "Invalid Address" }, \
+ { CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR, "Data Path Error" } \
+)
+
+#define CXL_GMER_TRANS_UNKNOWN 0x00
+#define CXL_GMER_TRANS_HOST_READ 0x01
+#define CXL_GMER_TRANS_HOST_WRITE 0x02
+#define CXL_GMER_TRANS_HOST_SCAN_MEDIA 0x03
+#define CXL_GMER_TRANS_HOST_INJECT_POISON 0x04
+#define CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB 0x05
+#define CXL_GMER_TRANS_INTERNAL_MEDIA_MANAGEMENT 0x06
+#define show_trans_type(type) __print_symbolic(type, \
+ { CXL_GMER_TRANS_UNKNOWN, "Unknown" }, \
+ { CXL_GMER_TRANS_HOST_READ, "Host Read" }, \
+ { CXL_GMER_TRANS_HOST_WRITE, "Host Write" }, \
+ { CXL_GMER_TRANS_HOST_SCAN_MEDIA, "Host Scan Media" }, \
+ { CXL_GMER_TRANS_HOST_INJECT_POISON, "Host Inject Poison" }, \
+ { CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB, "Internal Media Scrub" }, \
+ { CXL_GMER_TRANS_INTERNAL_MEDIA_MANAGEMENT, "Internal Media Management" } \
+)
+
+#define CXL_GMER_VALID_CHANNEL BIT(0)
+#define CXL_GMER_VALID_RANK BIT(1)
+#define CXL_GMER_VALID_DEVICE BIT(2)
+#define CXL_GMER_VALID_COMPONENT BIT(3)
+#define show_valid_flags(flags) __print_flags(flags, "|", \
+ { CXL_GMER_VALID_CHANNEL, "CHANNEL" }, \
+ { CXL_GMER_VALID_RANK, "RANK" }, \
+ { CXL_GMER_VALID_DEVICE, "DEVICE" }, \
+ { CXL_GMER_VALID_COMPONENT, "COMPONENT" } \
+)
+
+TRACE_EVENT(cxl_general_media,
+
+ TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+ struct cxl_event_gen_media *rec),
+
+ TP_ARGS(dev, log, rec),
+
+ TP_STRUCT__entry(
+ CXL_EVT_TP_entry
+ /* General Media */
+ __field(u64, dpa)
+ __field(u8, descriptor)
+ __field(u8, type)
+ __field(u8, transaction_type)
+ __field(u8, channel)
+ __field(u32, device)
+ __array(u8, comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE)
+ __field(u16, validity_flags)
+ /* Following are out of order to pack trace record */
+ __field(u8, rank)
+ __field(u8, dpa_flags)
+ ),
+
+ TP_fast_assign(
+ CXL_EVT_TP_fast_assign(dev, log, rec->hdr);
+
+ /* General Media */
+ __entry->dpa = le64_to_cpu(rec->phys_addr);
+ __entry->dpa_flags = __entry->dpa & CXL_DPA_FLAGS_MASK;
+ /* Mask after flags have been parsed */
+ __entry->dpa &= CXL_DPA_MASK;
+ __entry->descriptor = rec->descriptor;
+ __entry->type = rec->type;
+ __entry->transaction_type = rec->transaction_type;
+ __entry->channel = rec->channel;
+ __entry->rank = rec->rank;
+ __entry->device = get_unaligned_le24(rec->device);
+ memcpy(__entry->comp_id, &rec->component_id,
+ CXL_EVENT_GEN_MED_COMP_ID_SIZE);
+ __entry->validity_flags = get_unaligned_le16(&rec->validity_flags);
+ ),
+
+ CXL_EVT_TP_printk("dpa=%llx dpa_flags='%s' " \
+ "descriptor='%s' type='%s' transaction_type='%s' channel=%u rank=%u " \
+ "device=%x comp_id=%s validity_flags='%s'",
+ __entry->dpa, show_dpa_flags(__entry->dpa_flags),
+ show_event_desc_flags(__entry->descriptor),
+ show_mem_event_type(__entry->type),
+ show_trans_type(__entry->transaction_type),
+ __entry->channel, __entry->rank, __entry->device,
+ __print_hex(__entry->comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE),
+ show_valid_flags(__entry->validity_flags)
+ )
+);
+
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index e6b27e5d5009..7f6355bd6d23 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -451,6 +451,25 @@ struct cxl_mbox_clear_event_payload {
(offsetof(struct cxl_mbox_clear_event_payload, handle) + \
(nr_handles * sizeof(__le16)))
+/*
+ * 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;
+
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 3/8] cxl/mem: Trace General Media Event Record
2023-01-09 19:42 ` [PATCH v6 3/8] cxl/mem: Trace General Media Event Record Ira Weiny
@ 2023-01-13 12:34 ` Jonathan Cameron
2023-01-13 17:16 ` Davidlohr Bueso
1 sibling, 0 replies; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 12:34 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl, shiju.jose
On Mon, 09 Jan 2023 11:42:22 -0800
Ira Weiny <ira.weiny@intel.com> wrote:
> CXL rev 3.0 section 8.2.9.2.1.1 defines the General Media Event Record.
>
> Determine if the event read is a general media record and if so trace
> the record as a General Media Event Record.
>
> Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
LGTM
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v6 3/8] cxl/mem: Trace General Media Event Record
2023-01-09 19:42 ` [PATCH v6 3/8] cxl/mem: Trace General Media Event Record Ira Weiny
2023-01-13 12:34 ` Jonathan Cameron
@ 2023-01-13 17:16 ` Davidlohr Bueso
1 sibling, 0 replies; 20+ messages in thread
From: Davidlohr Bueso @ 2023-01-13 17:16 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Jonathan Cameron, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023, Ira Weiny wrote:
>CXL rev 3.0 section 8.2.9.2.1.1 defines the General Media Event Record.
>
>Determine if the event read is a general media record and if so trace
>the record as a General Media Event Record.
>
>Reviewed-by: Dan Williams <dan.j.williams@intel.com>
>Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 4/8] cxl/mem: Trace DRAM Event Record
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
` (2 preceding siblings ...)
2023-01-09 19:42 ` [PATCH v6 3/8] cxl/mem: Trace General Media Event Record Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-13 12:36 ` Jonathan Cameron
2023-01-13 19:09 ` Davidlohr Bueso
2023-01-09 19:42 ` [PATCH v6 5/8] cxl/mem: Trace Memory Module " Ira Weiny
` (3 subsequent siblings)
7 siblings, 2 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
CXL rev 3.0 section 8.2.9.2.1.2 defines the DRAM Event Record.
Determine if the event read is a DRAM event record and if so trace the
record.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from v4:
pick up tag
---
drivers/cxl/core/mbox.c | 12 +++++++
drivers/cxl/core/trace.h | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/cxl/cxlmem.h | 23 ++++++++++++
3 files changed, 127 insertions(+)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 0ece1766f613..0101b4de700f 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -726,6 +726,14 @@ static const uuid_t gen_media_event_uuid =
UUID_INIT(0xfbcd0a77, 0xc260, 0x417f,
0x85, 0xa9, 0x08, 0x8b, 0x16, 0x21, 0xeb, 0xa6);
+/*
+ * DRAM Event Record
+ * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
+ */
+static const uuid_t dram_event_uuid =
+ UUID_INIT(0x601dcbb3, 0x9c06, 0x4eab,
+ 0xb8, 0xaf, 0x4e, 0x9b, 0xfb, 0x5c, 0x96, 0x24);
+
static void cxl_event_trace_record(const struct device *dev,
enum cxl_event_log_type type,
struct cxl_event_record_raw *record)
@@ -737,6 +745,10 @@ static void cxl_event_trace_record(const struct device *dev,
(struct cxl_event_gen_media *)record;
trace_cxl_general_media(dev, type, rec);
+ } else if (uuid_equal(id, &dram_event_uuid)) {
+ struct cxl_event_dram *rec = (struct cxl_event_dram *)record;
+
+ trace_cxl_dram(dev, type, rec);
} else {
/* For unknown record types print just the header */
trace_cxl_generic_event(dev, type, record);
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index d85f0481661d..b6321cfb1d9f 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -347,6 +347,98 @@ TRACE_EVENT(cxl_general_media,
)
);
+/*
+ * DRAM Event Record - DER
+ *
+ * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
+ */
+/*
+ * DRAM Event Record defines many fields the same as the General Media Event
+ * Record. Reuse those definitions as appropriate.
+ */
+#define CXL_DER_VALID_CHANNEL BIT(0)
+#define CXL_DER_VALID_RANK BIT(1)
+#define CXL_DER_VALID_NIBBLE BIT(2)
+#define CXL_DER_VALID_BANK_GROUP BIT(3)
+#define CXL_DER_VALID_BANK BIT(4)
+#define CXL_DER_VALID_ROW BIT(5)
+#define CXL_DER_VALID_COLUMN BIT(6)
+#define CXL_DER_VALID_CORRECTION_MASK BIT(7)
+#define show_dram_valid_flags(flags) __print_flags(flags, "|", \
+ { CXL_DER_VALID_CHANNEL, "CHANNEL" }, \
+ { CXL_DER_VALID_RANK, "RANK" }, \
+ { CXL_DER_VALID_NIBBLE, "NIBBLE" }, \
+ { CXL_DER_VALID_BANK_GROUP, "BANK GROUP" }, \
+ { CXL_DER_VALID_BANK, "BANK" }, \
+ { CXL_DER_VALID_ROW, "ROW" }, \
+ { CXL_DER_VALID_COLUMN, "COLUMN" }, \
+ { CXL_DER_VALID_CORRECTION_MASK, "CORRECTION MASK" } \
+)
+
+TRACE_EVENT(cxl_dram,
+
+ TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+ struct cxl_event_dram *rec),
+
+ TP_ARGS(dev, log, rec),
+
+ TP_STRUCT__entry(
+ CXL_EVT_TP_entry
+ /* DRAM */
+ __field(u64, dpa)
+ __field(u8, descriptor)
+ __field(u8, type)
+ __field(u8, transaction_type)
+ __field(u8, channel)
+ __field(u16, validity_flags)
+ __field(u16, column) /* Out of order to pack trace record */
+ __field(u32, nibble_mask)
+ __field(u32, row)
+ __array(u8, cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE)
+ __field(u8, rank) /* Out of order to pack trace record */
+ __field(u8, bank_group) /* Out of order to pack trace record */
+ __field(u8, bank) /* Out of order to pack trace record */
+ __field(u8, dpa_flags) /* Out of order to pack trace record */
+ ),
+
+ TP_fast_assign(
+ CXL_EVT_TP_fast_assign(dev, log, rec->hdr);
+
+ /* DRAM */
+ __entry->dpa = le64_to_cpu(rec->phys_addr);
+ __entry->dpa_flags = __entry->dpa & CXL_DPA_FLAGS_MASK;
+ __entry->dpa &= CXL_DPA_MASK;
+ __entry->descriptor = rec->descriptor;
+ __entry->type = rec->type;
+ __entry->transaction_type = rec->transaction_type;
+ __entry->validity_flags = get_unaligned_le16(rec->validity_flags);
+ __entry->channel = rec->channel;
+ __entry->rank = rec->rank;
+ __entry->nibble_mask = get_unaligned_le24(rec->nibble_mask);
+ __entry->bank_group = rec->bank_group;
+ __entry->bank = rec->bank;
+ __entry->row = get_unaligned_le24(rec->row);
+ __entry->column = get_unaligned_le16(rec->column);
+ memcpy(__entry->cor_mask, &rec->correction_mask,
+ CXL_EVENT_DER_CORRECTION_MASK_SIZE);
+ ),
+
+ CXL_EVT_TP_printk("dpa=%llx dpa_flags='%s' descriptor='%s' type='%s' " \
+ "transaction_type='%s' channel=%u rank=%u nibble_mask=%x " \
+ "bank_group=%u bank=%u row=%u column=%u cor_mask=%s " \
+ "validity_flags='%s'",
+ __entry->dpa, show_dpa_flags(__entry->dpa_flags),
+ show_event_desc_flags(__entry->descriptor),
+ show_mem_event_type(__entry->type),
+ show_trans_type(__entry->transaction_type),
+ __entry->channel, __entry->rank, __entry->nibble_mask,
+ __entry->bank_group, __entry->bank,
+ __entry->row, __entry->column,
+ __print_hex(__entry->cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE),
+ show_dram_valid_flags(__entry->validity_flags)
+ )
+);
+
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 7f6355bd6d23..27dc89d84037 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -470,6 +470,29 @@ struct cxl_event_gen_media {
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;
+
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 4/8] cxl/mem: Trace DRAM Event Record
2023-01-09 19:42 ` [PATCH v6 4/8] cxl/mem: Trace DRAM " Ira Weiny
@ 2023-01-13 12:36 ` Jonathan Cameron
2023-01-13 19:09 ` Davidlohr Bueso
1 sibling, 0 replies; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 12:36 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023 11:42:23 -0800
Ira Weiny <ira.weiny@intel.com> wrote:
> CXL rev 3.0 section 8.2.9.2.1.2 defines the DRAM Event Record.
>
> Determine if the event read is a DRAM event record and if so trace the
> record.
>
> Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* Re: [PATCH v6 4/8] cxl/mem: Trace DRAM Event Record
2023-01-09 19:42 ` [PATCH v6 4/8] cxl/mem: Trace DRAM " Ira Weiny
2023-01-13 12:36 ` Jonathan Cameron
@ 2023-01-13 19:09 ` Davidlohr Bueso
1 sibling, 0 replies; 20+ messages in thread
From: Davidlohr Bueso @ 2023-01-13 19:09 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Jonathan Cameron, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023, Ira Weiny wrote:
>CXL rev 3.0 section 8.2.9.2.1.2 defines the DRAM Event Record.
>
>Determine if the event read is a DRAM event record and if so trace the
>record.
>
>Reviewed-by: Dan Williams <dan.j.williams@intel.com>
>Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 5/8] cxl/mem: Trace Memory Module Event Record
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
` (3 preceding siblings ...)
2023-01-09 19:42 ` [PATCH v6 4/8] cxl/mem: Trace DRAM " Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-13 12:41 ` Jonathan Cameron
2023-01-09 19:42 ` [PATCH v6 6/8] cxl/test: Add generic mock events Ira Weiny
` (2 subsequent siblings)
7 siblings, 1 reply; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
CXL rev 3.0 section 8.2.9.2.1.3 defines the Memory Module Event Record.
Determine if the event read is memory module record and if so trace the
record.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Pick up tag
---
drivers/cxl/core/mbox.c | 13 +++++
drivers/cxl/core/trace.h | 143 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/cxl/cxlmem.h | 26 +++++++++
3 files changed, 182 insertions(+)
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 0101b4de700f..4ac9dc184ccf 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -734,6 +734,14 @@ static const uuid_t dram_event_uuid =
UUID_INIT(0x601dcbb3, 0x9c06, 0x4eab,
0xb8, 0xaf, 0x4e, 0x9b, 0xfb, 0x5c, 0x96, 0x24);
+/*
+ * Memory Module Event Record
+ * CXL rev 3.0 section 8.2.9.2.1.3; Table 8-45
+ */
+static const uuid_t mem_mod_event_uuid =
+ UUID_INIT(0xfe927475, 0xdd59, 0x4339,
+ 0xa5, 0x86, 0x79, 0xba, 0xb1, 0x13, 0xb7, 0x74);
+
static void cxl_event_trace_record(const struct device *dev,
enum cxl_event_log_type type,
struct cxl_event_record_raw *record)
@@ -749,6 +757,11 @@ static void cxl_event_trace_record(const struct device *dev,
struct cxl_event_dram *rec = (struct cxl_event_dram *)record;
trace_cxl_dram(dev, type, rec);
+ } else if (uuid_equal(id, &mem_mod_event_uuid)) {
+ struct cxl_event_mem_module *rec =
+ (struct cxl_event_mem_module *)record;
+
+ trace_cxl_memory_module(dev, type, rec);
} else {
/* For unknown record types print just the header */
trace_cxl_generic_event(dev, type, record);
diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index b6321cfb1d9f..ebb4c8ce8587 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -439,6 +439,149 @@ TRACE_EVENT(cxl_dram,
)
);
+/*
+ * Memory Module Event Record - MMER
+ *
+ * CXL res 3.0 section 8.2.9.2.1.3; Table 8-45
+ */
+#define CXL_MMER_HEALTH_STATUS_CHANGE 0x00
+#define CXL_MMER_MEDIA_STATUS_CHANGE 0x01
+#define CXL_MMER_LIFE_USED_CHANGE 0x02
+#define CXL_MMER_TEMP_CHANGE 0x03
+#define CXL_MMER_DATA_PATH_ERROR 0x04
+#define CXL_MMER_LAS_ERROR 0x05
+#define show_dev_evt_type(type) __print_symbolic(type, \
+ { CXL_MMER_HEALTH_STATUS_CHANGE, "Health Status Change" }, \
+ { CXL_MMER_MEDIA_STATUS_CHANGE, "Media Status Change" }, \
+ { CXL_MMER_LIFE_USED_CHANGE, "Life Used Change" }, \
+ { CXL_MMER_TEMP_CHANGE, "Temperature Change" }, \
+ { CXL_MMER_DATA_PATH_ERROR, "Data Path Error" }, \
+ { CXL_MMER_LAS_ERROR, "LSA Error" } \
+)
+
+/*
+ * Device Health Information - DHI
+ *
+ * CXL res 3.0 section 8.2.9.8.3.1; Table 8-100
+ */
+#define CXL_DHI_HS_MAINTENANCE_NEEDED BIT(0)
+#define CXL_DHI_HS_PERFORMANCE_DEGRADED BIT(1)
+#define CXL_DHI_HS_HW_REPLACEMENT_NEEDED BIT(2)
+#define show_health_status_flags(flags) __print_flags(flags, "|", \
+ { CXL_DHI_HS_MAINTENANCE_NEEDED, "MAINTENANCE_NEEDED" }, \
+ { CXL_DHI_HS_PERFORMANCE_DEGRADED, "PERFORMANCE_DEGRADED" }, \
+ { CXL_DHI_HS_HW_REPLACEMENT_NEEDED, "REPLACEMENT_NEEDED" } \
+)
+
+#define CXL_DHI_MS_NORMAL 0x00
+#define CXL_DHI_MS_NOT_READY 0x01
+#define CXL_DHI_MS_WRITE_PERSISTENCY_LOST 0x02
+#define CXL_DHI_MS_ALL_DATA_LOST 0x03
+#define CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_EVENT_POWER_LOSS 0x04
+#define CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_EVENT_SHUTDOWN 0x05
+#define CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_IMMINENT 0x06
+#define CXL_DHI_MS_WRITE_ALL_DATA_LOSS_EVENT_POWER_LOSS 0x07
+#define CXL_DHI_MS_WRITE_ALL_DATA_LOSS_EVENT_SHUTDOWN 0x08
+#define CXL_DHI_MS_WRITE_ALL_DATA_LOSS_IMMINENT 0x09
+#define show_media_status(ms) __print_symbolic(ms, \
+ { CXL_DHI_MS_NORMAL, \
+ "Normal" }, \
+ { CXL_DHI_MS_NOT_READY, \
+ "Not Ready" }, \
+ { CXL_DHI_MS_WRITE_PERSISTENCY_LOST, \
+ "Write Persistency Lost" }, \
+ { CXL_DHI_MS_ALL_DATA_LOST, \
+ "All Data Lost" }, \
+ { CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_EVENT_POWER_LOSS, \
+ "Write Persistency Loss in the Event of Power Loss" }, \
+ { CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_EVENT_SHUTDOWN, \
+ "Write Persistency Loss in Event of Shutdown" }, \
+ { CXL_DHI_MS_WRITE_PERSISTENCY_LOSS_IMMINENT, \
+ "Write Persistency Loss Imminent" }, \
+ { CXL_DHI_MS_WRITE_ALL_DATA_LOSS_EVENT_POWER_LOSS, \
+ "All Data Loss in Event of Power Loss" }, \
+ { CXL_DHI_MS_WRITE_ALL_DATA_LOSS_EVENT_SHUTDOWN, \
+ "All Data loss in the Event of Shutdown" }, \
+ { CXL_DHI_MS_WRITE_ALL_DATA_LOSS_IMMINENT, \
+ "All Data Loss Imminent" } \
+)
+
+#define CXL_DHI_AS_NORMAL 0x0
+#define CXL_DHI_AS_WARNING 0x1
+#define CXL_DHI_AS_CRITICAL 0x2
+#define show_two_bit_status(as) __print_symbolic(as, \
+ { CXL_DHI_AS_NORMAL, "Normal" }, \
+ { CXL_DHI_AS_WARNING, "Warning" }, \
+ { CXL_DHI_AS_CRITICAL, "Critical" } \
+)
+#define show_one_bit_status(as) __print_symbolic(as, \
+ { CXL_DHI_AS_NORMAL, "Normal" }, \
+ { CXL_DHI_AS_WARNING, "Warning" } \
+)
+
+#define CXL_DHI_AS_LIFE_USED(as) (as & 0x3)
+#define CXL_DHI_AS_DEV_TEMP(as) ((as & 0xC) >> 2)
+#define CXL_DHI_AS_COR_VOL_ERR_CNT(as) ((as & 0x10) >> 4)
+#define CXL_DHI_AS_COR_PER_ERR_CNT(as) ((as & 0x20) >> 5)
+
+TRACE_EVENT(cxl_memory_module,
+
+ TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+ struct cxl_event_mem_module *rec),
+
+ TP_ARGS(dev, log, rec),
+
+ TP_STRUCT__entry(
+ CXL_EVT_TP_entry
+
+ /* Memory Module Event */
+ __field(u8, event_type)
+
+ /* Device Health Info */
+ __field(u8, health_status)
+ __field(u8, media_status)
+ __field(u8, life_used)
+ __field(u32, dirty_shutdown_cnt)
+ __field(u32, cor_vol_err_cnt)
+ __field(u32, cor_per_err_cnt)
+ __field(s16, device_temp)
+ __field(u8, add_status)
+ ),
+
+ TP_fast_assign(
+ CXL_EVT_TP_fast_assign(dev, log, rec->hdr);
+
+ /* Memory Module Event */
+ __entry->event_type = rec->event_type;
+
+ /* Device Health Info */
+ __entry->health_status = rec->info.health_status;
+ __entry->media_status = rec->info.media_status;
+ __entry->life_used = rec->info.life_used;
+ __entry->dirty_shutdown_cnt = get_unaligned_le32(rec->info.dirty_shutdown_cnt);
+ __entry->cor_vol_err_cnt = get_unaligned_le32(rec->info.cor_vol_err_cnt);
+ __entry->cor_per_err_cnt = get_unaligned_le32(rec->info.cor_per_err_cnt);
+ __entry->device_temp = get_unaligned_le16(rec->info.device_temp);
+ __entry->add_status = rec->info.add_status;
+ ),
+
+ CXL_EVT_TP_printk("event_type='%s' health_status='%s' media_status='%s' " \
+ "as_life_used=%s as_dev_temp=%s as_cor_vol_err_cnt=%s " \
+ "as_cor_per_err_cnt=%s life_used=%u device_temp=%d " \
+ "dirty_shutdown_cnt=%u cor_vol_err_cnt=%u cor_per_err_cnt=%u",
+ show_dev_evt_type(__entry->event_type),
+ show_health_status_flags(__entry->health_status),
+ show_media_status(__entry->media_status),
+ show_two_bit_status(CXL_DHI_AS_LIFE_USED(__entry->add_status)),
+ show_two_bit_status(CXL_DHI_AS_DEV_TEMP(__entry->add_status)),
+ show_one_bit_status(CXL_DHI_AS_COR_VOL_ERR_CNT(__entry->add_status)),
+ show_one_bit_status(CXL_DHI_AS_COR_PER_ERR_CNT(__entry->add_status)),
+ __entry->life_used, __entry->device_temp,
+ __entry->dirty_shutdown_cnt, __entry->cor_vol_err_cnt,
+ __entry->cor_per_err_cnt
+ )
+);
+
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 27dc89d84037..4eae1cf4e445 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -493,6 +493,32 @@ struct cxl_event_dram {
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;
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 5/8] cxl/mem: Trace Memory Module Event Record
2023-01-09 19:42 ` [PATCH v6 5/8] cxl/mem: Trace Memory Module " Ira Weiny
@ 2023-01-13 12:41 ` Jonathan Cameron
2023-01-18 1:12 ` Ira Weiny
0 siblings, 1 reply; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 12:41 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023 11:42:24 -0800
Ira Weiny <ira.weiny@intel.com> wrote:
> CXL rev 3.0 section 8.2.9.2.1.3 defines the Memory Module Event Record.
>
> Determine if the event read is memory module record and if so trace the
> record.
>
> Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Typo inline. With that fixed
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> index b6321cfb1d9f..ebb4c8ce8587 100644
> --- a/drivers/cxl/core/trace.h
> +++ b/drivers/cxl/core/trace.h
> @@ -439,6 +439,149 @@ TRACE_EVENT(cxl_dram,
> )
> );
>
> +/*
> + * Memory Module Event Record - MMER
> + *
> + * CXL res 3.0 section 8.2.9.2.1.3; Table 8-45
> + */
> +#define CXL_MMER_HEALTH_STATUS_CHANGE 0x00
> +#define CXL_MMER_MEDIA_STATUS_CHANGE 0x01
> +#define CXL_MMER_LIFE_USED_CHANGE 0x02
> +#define CXL_MMER_TEMP_CHANGE 0x03
> +#define CXL_MMER_DATA_PATH_ERROR 0x04
> +#define CXL_MMER_LAS_ERROR 0x05
CXL_MMER_LSA_ERROR
> +#define show_dev_evt_type(type) __print_symbolic(type, \
> + { CXL_MMER_HEALTH_STATUS_CHANGE, "Health Status Change" }, \
> + { CXL_MMER_MEDIA_STATUS_CHANGE, "Media Status Change" }, \
> + { CXL_MMER_LIFE_USED_CHANGE, "Life Used Change" }, \
> + { CXL_MMER_TEMP_CHANGE, "Temperature Change" }, \
> + { CXL_MMER_DATA_PATH_ERROR, "Data Path Error" }, \
> + { CXL_MMER_LAS_ERROR, "LSA Error" } \
> +)
^ permalink raw reply [flat|nested] 20+ messages in thread* Re: [PATCH v6 5/8] cxl/mem: Trace Memory Module Event Record
2023-01-13 12:41 ` Jonathan Cameron
@ 2023-01-18 1:12 ` Ira Weiny
0 siblings, 0 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-18 1:12 UTC (permalink / raw)
To: Jonathan Cameron, Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
Jonathan Cameron wrote:
> On Mon, 09 Jan 2023 11:42:24 -0800
> Ira Weiny <ira.weiny@intel.com> wrote:
>
> > CXL rev 3.0 section 8.2.9.2.1.3 defines the Memory Module Event Record.
> >
> > Determine if the event read is memory module record and if so trace the
> > record.
> >
> > Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> > Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> Typo inline. With that fixed
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
>
> > diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
> > index b6321cfb1d9f..ebb4c8ce8587 100644
> > --- a/drivers/cxl/core/trace.h
> > +++ b/drivers/cxl/core/trace.h
> > @@ -439,6 +439,149 @@ TRACE_EVENT(cxl_dram,
> > )
> > );
> >
> > +/*
> > + * Memory Module Event Record - MMER
> > + *
> > + * CXL res 3.0 section 8.2.9.2.1.3; Table 8-45
> > + */
> > +#define CXL_MMER_HEALTH_STATUS_CHANGE 0x00
> > +#define CXL_MMER_MEDIA_STATUS_CHANGE 0x01
> > +#define CXL_MMER_LIFE_USED_CHANGE 0x02
> > +#define CXL_MMER_TEMP_CHANGE 0x03
> > +#define CXL_MMER_DATA_PATH_ERROR 0x04
> > +#define CXL_MMER_LAS_ERROR 0x05
>
> CXL_MMER_LSA_ERROR
Done.
Thanks,
Ira
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 6/8] cxl/test: Add generic mock events
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
` (4 preceding siblings ...)
2023-01-09 19:42 ` [PATCH v6 5/8] cxl/mem: Trace Memory Module " Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-13 13:27 ` Jonathan Cameron
2023-01-09 19:42 ` [PATCH v6 7/8] cxl/test: Add specific events Ira Weiny
2023-01-09 19:42 ` [PATCH v6 8/8] cxl/test: Simulate event log overflow Ira Weiny
7 siblings, 1 reply; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
Facilitate testing basic Get/Clear Event functionality by creating
multiple logs and generic events with made up UUID's.
Data is completely made up with data patterns which should be easy to
spot in trace output.
A single sysfs entry resets the event data and triggers collecting the
events for testing.
Test traces are easy to obtain with a small script such as this:
#!/bin/bash -x
devices=`find /sys/devices/platform -name cxl_mem*`
# Turn on tracing
echo "" > /sys/kernel/tracing/trace
echo 1 > /sys/kernel/tracing/events/cxl/enable
echo 1 > /sys/kernel/tracing/tracing_on
# Generate fake interrupt
for device in $devices; do
echo 1 > $device/event_trigger
done
# Turn off tracing and report events
echo 0 > /sys/kernel/tracing/tracing_on
cat /sys/kernel/tracing/trace
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Pick up tag
---
tools/testing/cxl/test/Kbuild | 2 +-
tools/testing/cxl/test/mem.c | 231 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 232 insertions(+), 1 deletion(-)
diff --git a/tools/testing/cxl/test/Kbuild b/tools/testing/cxl/test/Kbuild
index 4e59e2c911f6..61d5f7bcddf9 100644
--- a/tools/testing/cxl/test/Kbuild
+++ b/tools/testing/cxl/test/Kbuild
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
-ccflags-y := -I$(srctree)/drivers/cxl/
+ccflags-y := -I$(srctree)/drivers/cxl/ -I$(srctree)/drivers/cxl/core
obj-m += cxl_test.o
obj-m += cxl_mock.o
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 5e4ecd93f1d2..036f27f9c18e 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -9,6 +9,8 @@
#include <linux/bits.h>
#include <cxlmem.h>
+#include "trace.h"
+
#define LSA_SIZE SZ_128K
#define DEV_SIZE SZ_2G
#define EFFECT(x) (1U << x)
@@ -67,6 +69,24 @@ static struct {
#define PASS_TRY_LIMIT 3
+#define CXL_TEST_EVENT_CNT_MAX 15
+
+/* Set a number of events to return at a time for simulation. */
+#define CXL_TEST_EVENT_CNT 3
+
+struct mock_event_log {
+ u16 clear_idx;
+ u16 cur_idx;
+ u16 nr_events;
+ struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX];
+};
+
+struct mock_event_store {
+ struct cxl_dev_state *cxlds;
+ struct mock_event_log mock_logs[CXL_EVENT_TYPE_MAX];
+ u32 ev_status;
+};
+
struct cxl_mockmem_data {
void *lsa;
u32 security_state;
@@ -74,9 +94,198 @@ struct cxl_mockmem_data {
u8 master_pass[NVDIMM_PASSPHRASE_LEN];
int user_limit;
int master_limit;
+ struct mock_event_store mes;
+ u8 event_buf[SZ_4K];
+};
+
+static struct mock_event_log *event_find_log(struct device *dev, int log_type)
+{
+ struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
+
+ if (log_type >= CXL_EVENT_TYPE_MAX)
+ return NULL;
+ return &mdata->mes.mock_logs[log_type];
+}
+
+static struct cxl_event_record_raw *event_get_current(struct mock_event_log *log)
+{
+ return log->events[log->cur_idx];
+}
+
+static void event_reset_log(struct mock_event_log *log)
+{
+ log->cur_idx = 0;
+ log->clear_idx = 0;
+}
+
+/* Handle can never be 0 use 1 based indexing for handle */
+static u16 event_get_clear_handle(struct mock_event_log *log)
+{
+ return log->clear_idx + 1;
+}
+
+/* Handle can never be 0 use 1 based indexing for handle */
+static __le16 event_get_cur_event_handle(struct mock_event_log *log)
+{
+ u16 cur_handle = log->cur_idx + 1;
+
+ return cpu_to_le16(cur_handle);
+}
+
+static bool event_log_empty(struct mock_event_log *log)
+{
+ return log->cur_idx == log->nr_events;
+}
+
+static void mes_add_event(struct mock_event_store *mes,
+ enum cxl_event_log_type log_type,
+ struct cxl_event_record_raw *event)
+{
+ struct mock_event_log *log;
+
+ if (WARN_ON(log_type >= CXL_EVENT_TYPE_MAX))
+ return;
+
+ log = &mes->mock_logs[log_type];
+ if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX))
+ return;
+
+ log->events[log->nr_events] = event;
+ log->nr_events++;
+}
+
+static int mock_get_event(struct cxl_dev_state *cxlds,
+ struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_get_event_payload *pl;
+ struct mock_event_log *log;
+ u8 log_type;
+ int i;
+
+ if (cmd->size_in != sizeof(log_type))
+ return -EINVAL;
+
+ if (cmd->size_out < struct_size(pl, records, CXL_TEST_EVENT_CNT))
+ return -EINVAL;
+
+ log_type = *((u8 *)cmd->payload_in);
+ if (log_type >= CXL_EVENT_TYPE_MAX)
+ return -EINVAL;
+
+ memset(cmd->payload_out, 0, cmd->size_out);
+
+ log = event_find_log(cxlds->dev, log_type);
+ if (!log || event_log_empty(log))
+ return 0;
+
+ pl = cmd->payload_out;
+
+ for (i = 0; i < CXL_TEST_EVENT_CNT && !event_log_empty(log); i++) {
+ memcpy(&pl->records[i], event_get_current(log),
+ sizeof(pl->records[i]));
+ pl->records[i].hdr.handle = event_get_cur_event_handle(log);
+ log->cur_idx++;
+ }
+
+ pl->record_count = cpu_to_le16(i);
+ if (!event_log_empty(log))
+ pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;
+
+ return 0;
+}
+
+static int mock_clear_event(struct cxl_dev_state *cxlds,
+ struct cxl_mbox_cmd *cmd)
+{
+ struct cxl_mbox_clear_event_payload *pl = cmd->payload_in;
+ struct mock_event_log *log;
+ u8 log_type = pl->event_log;
+ u16 handle;
+ int nr;
+
+ if (log_type >= CXL_EVENT_TYPE_MAX)
+ return -EINVAL;
+
+ log = event_find_log(cxlds->dev, log_type);
+ if (!log)
+ return 0; /* No mock data in this log */
+
+ /*
+ * This check is technically not invalid per the specification AFAICS.
+ * (The host could 'guess' handles and clear them in order).
+ * However, this is not good behavior for the host so test it.
+ */
+ if (log->clear_idx + pl->nr_recs > log->cur_idx) {
+ dev_err(cxlds->dev,
+ "Attempting to clear more events than returned!\n");
+ return -EINVAL;
+ }
+
+ /* Check handle order prior to clearing events */
+ for (nr = 0, handle = event_get_clear_handle(log);
+ nr < pl->nr_recs;
+ nr++, handle++) {
+ if (handle != le16_to_cpu(pl->handle[nr])) {
+ dev_err(cxlds->dev, "Clearing events out of order\n");
+ return -EINVAL;
+ }
+ }
+
+ /* Clear events */
+ log->clear_idx += pl->nr_recs;
+ return 0;
+}
+
+static void cxl_mock_event_trigger(struct device *dev)
+{
+ struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
+ struct mock_event_store *mes = &mdata->mes;
+ int i;
+
+ for (i = CXL_EVENT_TYPE_INFO; i < CXL_EVENT_TYPE_MAX; i++) {
+ struct mock_event_log *log;
+
+ log = event_find_log(dev, i);
+ if (log)
+ event_reset_log(log);
+ }
+
+ cxl_mem_get_event_records(mes->cxlds, mes->ev_status);
+}
+
+struct cxl_event_record_raw maint_needed = {
+ .hdr = {
+ .id = UUID_INIT(0xBA5EBA11, 0xABCD, 0xEFEB,
+ 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5),
+ .length = sizeof(struct cxl_event_record_raw),
+ .flags[0] = CXL_EVENT_RECORD_FLAG_MAINT_NEEDED,
+ /* .handle = Set dynamically */
+ .related_handle = cpu_to_le16(0xa5b6),
+ },
+ .data = { 0xDE, 0xAD, 0xBE, 0xEF },
+};
+struct cxl_event_record_raw hardware_replace = {
+ .hdr = {
+ .id = UUID_INIT(0xABCDEFEB, 0xBA11, 0xBA5E,
+ 0xa5, 0x5a, 0xa5, 0x5a, 0xa5, 0xa5, 0x5a, 0xa5),
+ .length = sizeof(struct cxl_event_record_raw),
+ .flags[0] = CXL_EVENT_RECORD_FLAG_HW_REPLACE,
+ /* .handle = Set dynamically */
+ .related_handle = cpu_to_le16(0xb6a5),
+ },
+ .data = { 0xDE, 0xAD, 0xBE, 0xEF },
};
+static void cxl_mock_add_event_logs(struct mock_event_store *mes)
+{
+ mes_add_event(mes, CXL_EVENT_TYPE_INFO, &maint_needed);
+ mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;
+
+ mes_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);
+ mes->ev_status |= CXLDEV_EVENT_STATUS_FATAL;
+}
+
static int mock_gsl(struct cxl_mbox_cmd *cmd)
{
if (cmd->size_out < sizeof(mock_gsl_payload))
@@ -582,6 +791,12 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
case CXL_MBOX_OP_GET_PARTITION_INFO:
rc = mock_partition_info(cxlds, cmd);
break;
+ case CXL_MBOX_OP_GET_EVENT_RECORD:
+ rc = mock_get_event(cxlds, cmd);
+ break;
+ case CXL_MBOX_OP_CLEAR_EVENT_RECORD:
+ rc = mock_clear_event(cxlds, cmd);
+ break;
case CXL_MBOX_OP_SET_LSA:
rc = mock_set_lsa(cxlds, cmd);
break;
@@ -628,6 +843,15 @@ static bool is_rcd(struct platform_device *pdev)
return !!id->driver_data;
}
+static ssize_t event_trigger_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ cxl_mock_event_trigger(dev);
+ return count;
+}
+static DEVICE_ATTR_WO(event_trigger);
+
static int cxl_mock_mem_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -655,6 +879,7 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
cxlds->serial = pdev->id;
cxlds->mbox_send = cxl_mock_mbox_send;
cxlds->payload_size = SZ_4K;
+ cxlds->event.buf = (struct cxl_get_event_payload *) mdata->event_buf;
if (is_rcd(pdev)) {
cxlds->rcd = true;
cxlds->component_reg_phys = CXL_RESOURCE_NONE;
@@ -672,10 +897,15 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
if (rc)
return rc;
+ mdata->mes.cxlds = cxlds;
+ cxl_mock_add_event_logs(&mdata->mes);
+
cxlmd = devm_cxl_add_memdev(cxlds);
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
+ cxl_mem_get_event_records(cxlds, CXLDEV_EVENT_STATUS_ALL);
+
return 0;
}
@@ -714,6 +944,7 @@ static DEVICE_ATTR_RW(security_lock);
static struct attribute *cxl_mock_mem_attrs[] = {
&dev_attr_security_lock.attr,
+ &dev_attr_event_trigger.attr,
NULL
};
ATTRIBUTE_GROUPS(cxl_mock_mem);
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* Re: [PATCH v6 6/8] cxl/test: Add generic mock events
2023-01-09 19:42 ` [PATCH v6 6/8] cxl/test: Add generic mock events Ira Weiny
@ 2023-01-13 13:27 ` Jonathan Cameron
0 siblings, 0 replies; 20+ messages in thread
From: Jonathan Cameron @ 2023-01-13 13:27 UTC (permalink / raw)
To: Ira Weiny
Cc: Dan Williams, Bjorn Helgaas, Alison Schofield, Vishal Verma,
Davidlohr Bueso, Dave Jiang, Ben Widawsky, Steven Rostedt,
linux-kernel, linux-pci, linux-acpi, linux-cxl
On Mon, 09 Jan 2023 11:42:25 -0800
Ira Weiny <ira.weiny@intel.com> wrote:
> Facilitate testing basic Get/Clear Event functionality by creating
> multiple logs and generic events with made up UUID's.
>
> Data is completely made up with data patterns which should be easy to
> spot in trace output.
>
> A single sysfs entry resets the event data and triggers collecting the
> events for testing.
>
> Test traces are easy to obtain with a small script such as this:
>
> #!/bin/bash -x
>
> devices=`find /sys/devices/platform -name cxl_mem*`
>
> # Turn on tracing
> echo "" > /sys/kernel/tracing/trace
> echo 1 > /sys/kernel/tracing/events/cxl/enable
> echo 1 > /sys/kernel/tracing/tracing_on
>
> # Generate fake interrupt
> for device in $devices; do
> echo 1 > $device/event_trigger
> done
>
> # Turn off tracing and report events
> echo 0 > /sys/kernel/tracing/tracing_on
> cat /sys/kernel/tracing/trace
>
> Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Looks like it will test the kernel functionality in this
patch set correctly to me.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
^ permalink raw reply [flat|nested] 20+ messages in thread
* [PATCH v6 7/8] cxl/test: Add specific events
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
` (5 preceding siblings ...)
2023-01-09 19:42 ` [PATCH v6 6/8] cxl/test: Add generic mock events Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
2023-01-09 19:42 ` [PATCH v6 8/8] cxl/test: Simulate event log overflow Ira Weiny
7 siblings, 0 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
Each type of event has different trace point outputs.
Add mock General Media Event, DRAM event, and Memory Module Event
records to the mock list of events returned.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Pick up tag
---
tools/testing/cxl/test/mem.c | 73 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 036f27f9c18e..73db722a8879 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -277,12 +277,85 @@ struct cxl_event_record_raw hardware_replace = {
.data = { 0xDE, 0xAD, 0xBE, 0xEF },
};
+struct cxl_event_gen_media gen_media = {
+ .hdr = {
+ .id = UUID_INIT(0xfbcd0a77, 0xc260, 0x417f,
+ 0x85, 0xa9, 0x08, 0x8b, 0x16, 0x21, 0xeb, 0xa6),
+ .length = sizeof(struct cxl_event_gen_media),
+ .flags[0] = CXL_EVENT_RECORD_FLAG_PERMANENT,
+ /* .handle = Set dynamically */
+ .related_handle = cpu_to_le16(0),
+ },
+ .phys_addr = cpu_to_le64(0x2000),
+ .descriptor = CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT,
+ .type = CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR,
+ .transaction_type = CXL_GMER_TRANS_HOST_WRITE,
+ /* .validity_flags = <set below> */
+ .channel = 1,
+ .rank = 30
+};
+
+struct cxl_event_dram dram = {
+ .hdr = {
+ .id = UUID_INIT(0x601dcbb3, 0x9c06, 0x4eab,
+ 0xb8, 0xaf, 0x4e, 0x9b, 0xfb, 0x5c, 0x96, 0x24),
+ .length = sizeof(struct cxl_event_dram),
+ .flags[0] = CXL_EVENT_RECORD_FLAG_PERF_DEGRADED,
+ /* .handle = Set dynamically */
+ .related_handle = cpu_to_le16(0),
+ },
+ .phys_addr = cpu_to_le64(0x8000),
+ .descriptor = CXL_GMER_EVT_DESC_THRESHOLD_EVENT,
+ .type = CXL_GMER_MEM_EVT_TYPE_INV_ADDR,
+ .transaction_type = CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB,
+ /* .validity_flags = <set below> */
+ .channel = 1,
+ .bank_group = 5,
+ .bank = 2,
+ .column = {0xDE, 0xAD},
+};
+
+struct cxl_event_mem_module mem_module = {
+ .hdr = {
+ .id = UUID_INIT(0xfe927475, 0xdd59, 0x4339,
+ 0xa5, 0x86, 0x79, 0xba, 0xb1, 0x13, 0xb7, 0x74),
+ .length = sizeof(struct cxl_event_mem_module),
+ /* .handle = Set dynamically */
+ .related_handle = cpu_to_le16(0),
+ },
+ .event_type = CXL_MMER_TEMP_CHANGE,
+ .info = {
+ .health_status = CXL_DHI_HS_PERFORMANCE_DEGRADED,
+ .media_status = CXL_DHI_MS_ALL_DATA_LOST,
+ .add_status = (CXL_DHI_AS_CRITICAL << 2) |
+ (CXL_DHI_AS_WARNING << 4) |
+ (CXL_DHI_AS_WARNING << 5),
+ .device_temp = { 0xDE, 0xAD},
+ .dirty_shutdown_cnt = { 0xde, 0xad, 0xbe, 0xef },
+ .cor_vol_err_cnt = { 0xde, 0xad, 0xbe, 0xef },
+ .cor_per_err_cnt = { 0xde, 0xad, 0xbe, 0xef },
+ }
+};
+
static void cxl_mock_add_event_logs(struct mock_event_store *mes)
{
+ put_unaligned_le16(CXL_GMER_VALID_CHANNEL | CXL_GMER_VALID_RANK,
+ &gen_media.validity_flags);
+
+ put_unaligned_le16(CXL_DER_VALID_CHANNEL | CXL_DER_VALID_BANK_GROUP |
+ CXL_DER_VALID_BANK | CXL_DER_VALID_COLUMN,
+ &dram.validity_flags);
+
mes_add_event(mes, CXL_EVENT_TYPE_INFO, &maint_needed);
+ mes_add_event(mes, CXL_EVENT_TYPE_INFO,
+ (struct cxl_event_record_raw *)&gen_media);
+ mes_add_event(mes, CXL_EVENT_TYPE_INFO,
+ (struct cxl_event_record_raw *)&mem_module);
mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;
mes_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FATAL,
+ (struct cxl_event_record_raw *)&dram);
mes->ev_status |= CXLDEV_EVENT_STATUS_FATAL;
}
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread* [PATCH v6 8/8] cxl/test: Simulate event log overflow
2023-01-09 19:42 [PATCH v6 0/8] cxl: Process event logs Ira Weiny
` (6 preceding siblings ...)
2023-01-09 19:42 ` [PATCH v6 7/8] cxl/test: Add specific events Ira Weiny
@ 2023-01-09 19:42 ` Ira Weiny
7 siblings, 0 replies; 20+ messages in thread
From: Ira Weiny @ 2023-01-09 19:42 UTC (permalink / raw)
To: Dan Williams
Cc: Bjorn Helgaas, Alison Schofield, Vishal Verma, Ira Weiny,
Davidlohr Bueso, Jonathan Cameron, Dave Jiang, Ben Widawsky,
Steven Rostedt, linux-kernel, linux-pci, linux-acpi, linux-cxl
Log overflow is marked by a separate trace message.
Simulate a log with lots of messages and flag overflow until space is
cleared.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V4:
Pick up tag
---
tools/testing/cxl/test/mem.c | 50 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 49 insertions(+), 1 deletion(-)
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 73db722a8879..b2327a8de4a6 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -78,6 +78,8 @@ struct mock_event_log {
u16 clear_idx;
u16 cur_idx;
u16 nr_events;
+ u16 nr_overflow;
+ u16 overflow_reset;
struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX];
};
@@ -116,6 +118,7 @@ static void event_reset_log(struct mock_event_log *log)
{
log->cur_idx = 0;
log->clear_idx = 0;
+ log->nr_overflow = log->overflow_reset;
}
/* Handle can never be 0 use 1 based indexing for handle */
@@ -147,8 +150,12 @@ static void mes_add_event(struct mock_event_store *mes,
return;
log = &mes->mock_logs[log_type];
- if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX))
+
+ if ((log->nr_events + 1) > CXL_TEST_EVENT_CNT_MAX) {
+ log->nr_overflow++;
+ log->overflow_reset = log->nr_overflow;
return;
+ }
log->events[log->nr_events] = event;
log->nr_events++;
@@ -159,6 +166,7 @@ static int mock_get_event(struct cxl_dev_state *cxlds,
{
struct cxl_get_event_payload *pl;
struct mock_event_log *log;
+ u16 nr_overflow;
u8 log_type;
int i;
@@ -191,6 +199,19 @@ static int mock_get_event(struct cxl_dev_state *cxlds,
if (!event_log_empty(log))
pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;
+ if (log->nr_overflow) {
+ u64 ns;
+
+ pl->flags |= CXL_GET_EVENT_FLAG_OVERFLOW;
+ pl->overflow_err_count = cpu_to_le16(nr_overflow);
+ ns = ktime_get_real_ns();
+ ns -= 5000000000; /* 5s ago */
+ pl->first_overflow_timestamp = cpu_to_le64(ns);
+ ns = ktime_get_real_ns();
+ ns -= 1000000000; /* 1s ago */
+ pl->last_overflow_timestamp = cpu_to_le64(ns);
+ }
+
return 0;
}
@@ -231,6 +252,9 @@ static int mock_clear_event(struct cxl_dev_state *cxlds,
}
}
+ if (log->nr_overflow)
+ log->nr_overflow = 0;
+
/* Clear events */
log->clear_idx += pl->nr_recs;
return 0;
@@ -353,6 +377,30 @@ static void cxl_mock_add_event_logs(struct mock_event_store *mes)
(struct cxl_event_record_raw *)&mem_module);
mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &maint_needed);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL,
+ (struct cxl_event_record_raw *)&dram);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL,
+ (struct cxl_event_record_raw *)&gen_media);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL,
+ (struct cxl_event_record_raw *)&mem_module);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL,
+ (struct cxl_event_record_raw *)&dram);
+ /* Overflow this log */
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);
+ mes->ev_status |= CXLDEV_EVENT_STATUS_FAIL;
+
mes_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);
mes_add_event(mes, CXL_EVENT_TYPE_FATAL,
(struct cxl_event_record_raw *)&dram);
--
2.39.0
^ permalink raw reply related [flat|nested] 20+ messages in thread