[ndctl PATCH RESEND 2/2] libcxl: Fix accessors for temperature field to support negative value

[Jehoon Park <jehoon.park@samsung.com>]

Add a new macro function to retrieve a signed value such as a temperature.
Replace indistinguishable error numbers with debug message.

Signed-off-by: Jehoon Park <jehoon.park@samsung.com>
---
 cxl/lib/libcxl.c | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index 769cd8a..fca7faa 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -3452,11 +3452,21 @@ cxl_cmd_alert_config_get_life_used_prog_warn_threshold(struct cxl_cmd *cmd)
 			 life_used_prog_warn_threshold);
 }
 
+#define cmd_get_field_s16(cmd, n, N, field)				\
+do {									\
+	struct cxl_cmd_##n *c =						\
+		(struct cxl_cmd_##n *)cmd->send_cmd->out.payload;	\
+	int rc = cxl_cmd_validate_status(cmd, CXL_MEM_COMMAND_ID_##N);	\
+	if (rc)								\
+		return 0xffff;						\
+	return (int16_t)le16_to_cpu(c->field);					\
+} while(0)
+
 CXL_EXPORT int
 cxl_cmd_alert_config_get_dev_over_temperature_crit_alert_threshold(
 	struct cxl_cmd *cmd)
 {
-	cmd_get_field_u16(cmd, get_alert_config, GET_ALERT_CONFIG,
+	cmd_get_field_s16(cmd, get_alert_config, GET_ALERT_CONFIG,
 			  dev_over_temperature_crit_alert_threshold);
 }
 
@@ -3464,7 +3474,7 @@ CXL_EXPORT int
 cxl_cmd_alert_config_get_dev_under_temperature_crit_alert_threshold(
 	struct cxl_cmd *cmd)
 {
-	cmd_get_field_u16(cmd, get_alert_config, GET_ALERT_CONFIG,
+	cmd_get_field_s16(cmd, get_alert_config, GET_ALERT_CONFIG,
 			  dev_under_temperature_crit_alert_threshold);
 }
 
@@ -3472,7 +3482,7 @@ CXL_EXPORT int
 cxl_cmd_alert_config_get_dev_over_temperature_prog_warn_threshold(
 	struct cxl_cmd *cmd)
 {
-	cmd_get_field_u16(cmd, get_alert_config, GET_ALERT_CONFIG,
+	cmd_get_field_s16(cmd, get_alert_config, GET_ALERT_CONFIG,
 			  dev_over_temperature_prog_warn_threshold);
 }
 
@@ -3480,7 +3490,7 @@ CXL_EXPORT int
 cxl_cmd_alert_config_get_dev_under_temperature_prog_warn_threshold(
 	struct cxl_cmd *cmd)
 {
-	cmd_get_field_u16(cmd, get_alert_config, GET_ALERT_CONFIG,
+	cmd_get_field_s16(cmd, get_alert_config, GET_ALERT_CONFIG,
 			  dev_under_temperature_prog_warn_threshold);
 }
 
@@ -3695,28 +3705,34 @@ static int health_info_get_life_used_raw(struct cxl_cmd *cmd)
 CXL_EXPORT int cxl_cmd_health_info_get_life_used(struct cxl_cmd *cmd)
 {
 	int rc = health_info_get_life_used_raw(cmd);
+	struct cxl_ctx *ctx = cxl_memdev_get_ctx(cmd->memdev);
 
 	if (rc < 0)
-		return rc;
+		dbg(ctx, "%s: Invalid command status\n",
+		    cxl_memdev_get_devname(cmd->memdev));
 	if (rc == CXL_CMD_HEALTH_INFO_LIFE_USED_NOT_IMPL)
-		return -EOPNOTSUPP;
+		dbg(ctx, "%s: Life Used not implemented\n",
+		    cxl_memdev_get_devname(cmd->memdev));
 	return rc;
 }
 
 static int health_info_get_temperature_raw(struct cxl_cmd *cmd)
 {
-	cmd_get_field_u16(cmd, get_health_info, GET_HEALTH_INFO,
+	cmd_get_field_s16(cmd, get_health_info, GET_HEALTH_INFO,
 				 temperature);
 }
 
 CXL_EXPORT int cxl_cmd_health_info_get_temperature(struct cxl_cmd *cmd)
 {
 	int rc = health_info_get_temperature_raw(cmd);
+	struct cxl_ctx *ctx = cxl_memdev_get_ctx(cmd->memdev);
 
-	if (rc < 0)
-		return rc;
+	if (rc == 0xffff)
+		dbg(ctx, "%s: Invalid command status\n",
+		    cxl_memdev_get_devname(cmd->memdev));
 	if (rc == CXL_CMD_HEALTH_INFO_TEMPERATURE_NOT_IMPL)
-		return -EOPNOTSUPP;
+		dbg(ctx, "%s: Device Temperature not implemented\n",
+		    cxl_memdev_get_devname(cmd->memdev));
 	return rc;
 }
 
-- 
2.17.1