---
Changes in v7:
<no change>
---
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..90a463f83ae4 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->handles[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);
