[PATCH v2] tools/testing/cxl: add mock output for the GET_HEALTH_INFO command

[Vishal Verma <vishal.l.verma@intel.com>]

Add mocked health information for cxl_test memdevs. This allows
cxl-cli's 'list' command to display the canned health_info fields.

Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 tools/testing/cxl/test/mem.c | 48 ++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

v2:
- Move the health_info struct definition into tools/testing since the
  mock driver is currently the only user (Dan)
- Add comments for the various status fields describing the flags being
  set (Dan)
- Add a size check before copying the cmd buffer (Dan)

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 12a8437a9ca0..60264a18d3ca 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -28,8 +28,24 @@ static struct cxl_cel_entry mock_cel[] = {
 		.opcode = cpu_to_le16(CXL_MBOX_OP_SET_LSA),
 		.effect = cpu_to_le16(EFFECT(1) | EFFECT(2)),
 	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO),
+		.effect = cpu_to_le16(0),
+	},
 };
 
+/* See CXL 2.0 Table 181 Get Health Info Output Payload */
+struct cxl_mbox_health_info {
+	u8 health_status;
+	u8 media_status;
+	u8 ext_status;
+	u8 life_used;
+	__le16 temperature;
+	__le32 dirty_shutdowns;
+	__le32 volatile_errors;
+	__le32 pmem_errors;
+} __packed;
+
 static struct {
 	struct cxl_mbox_get_supported_logs gsl;
 	struct cxl_gsl_entry entry;
@@ -156,6 +172,35 @@ static int mock_set_lsa(struct cxl_mem *cxlm, struct cxl_mbox_cmd *cmd)
 	return 0;
 }
 
+static int mock_health_info(struct cxl_mem *cxlm, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_health_info health_info = {
+		/* set flags for maint needed, perf degraded, hw replacement */
+		.health_status = 0x7,
+		/* set media status to "All Data Lost" */
+		.media_status = 0x3,
+		/*
+		 * set ext_status flags for:
+		 *  ext_life_used: normal,
+		 *  ext_temperature: critical,
+		 *  ext_corrected_volatile: warning,
+		 *  ext_corrected_persistent: normal,
+		 */
+		.ext_status = 0x18,
+		.life_used = 15,
+		.temperature = cpu_to_le16(25),
+		.dirty_shutdowns = cpu_to_le16(10),
+		.volatile_errors = cpu_to_le16(20),
+		.pmem_errors = cpu_to_le16(30),
+	};
+
+	if (cmd->size_out < sizeof(health_info))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &health_info, sizeof(health_info));
+	return 0;
+}
+
 static int cxl_mock_mbox_send(struct cxl_mem *cxlm, struct cxl_mbox_cmd *cmd)
 {
 	struct device *dev = cxlm->dev;
@@ -177,6 +222,9 @@ static int cxl_mock_mbox_send(struct cxl_mem *cxlm, struct cxl_mbox_cmd *cmd)
 	case CXL_MBOX_OP_SET_LSA:
 		rc = mock_set_lsa(cxlm, cmd);
 		break;
+	case CXL_MBOX_OP_GET_HEALTH_INFO:
+		rc = mock_health_info(cxlm, cmd);
+		break;
 	default:
 		break;
 	}

base-commit: ed97afb53365cd03dde266c9644334a558fe5a16
-- 
2.31.1