Commit e77e9c10 authored by Dave Jiang's avatar Dave Jiang Committed by Jason Gunthorpe
Browse files

cxl/test: Add Get Feature support to cxl_test 

Add emulation of Get Feature command to cxl_test. The feature for
device patrol scrub is returned by the emulation code. This is
the only feature currently supported by cxl_test. It returns
the information for the device patrol scrub feature.

Link: https://patch.msgid.link/r/20250307205648.1021626-7-dave.jiang@intel.com


Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarDan Williams <dan.j.williams@intel.com>
Reviewed-by: default avatarLi Ming <ming.li@zohomail.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent eb5dfcb9

tools/testing/cxl/test/mem.c

+56 −0
Original line number Diff line number Diff line
@@ -48,6 +48,10 @@ static struct cxl_cel_entry mock_cel[] = { 
		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_FEATURES),

		.effect = CXL_CMD_EFFECT_NONE,

	},

	{

		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_FEATURE),

		.effect = CXL_CMD_EFFECT_NONE,

	},

	{

		.opcode = cpu_to_le16(CXL_MBOX_OP_IDENTIFY),

		.effect = CXL_CMD_EFFECT_NONE,
@@ -149,6 +153,10 @@ struct mock_event_store { 
	u32 ev_status;

};



struct vendor_test_feat {

	__le32 data;

} __packed;



struct cxl_mockmem_data {

	void *lsa;

	void *fw;
@@ -165,6 +173,7 @@ struct cxl_mockmem_data { 
	u8 event_buf[SZ_4K];

	u64 timestamp;

	unsigned long sanitize_timeout;

	struct vendor_test_feat test_feat;

};



static struct mock_event_log *event_find_log(struct device *dev, int log_type)
@@ -1379,6 +1388,44 @@ static void fill_feature_vendor_test(struct cxl_feat_entry *feat) 


#define MAX_CXL_TEST_FEATS	1



static int mock_get_test_feature(struct cxl_mockmem_data *mdata,

				 struct cxl_mbox_cmd *cmd)

{

	struct vendor_test_feat *output = cmd->payload_out;

	struct cxl_mbox_get_feat_in *input = cmd->payload_in;

	u16 offset = le16_to_cpu(input->offset);

	u16 count = le16_to_cpu(input->count);

	u8 *ptr;



	if (offset > sizeof(*output)) {

		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;

		return -EINVAL;

	}



	if (offset + count > sizeof(*output)) {

		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;

		return -EINVAL;

	}



	ptr = (u8 *)&mdata->test_feat + offset;

	memcpy((u8 *)output + offset, ptr, count);



	return 0;

}



static int mock_get_feature(struct cxl_mockmem_data *mdata,

			    struct cxl_mbox_cmd *cmd)

{

	struct cxl_mbox_get_feat_in *input = cmd->payload_in;



	if (uuid_equal(&input->uuid, &CXL_VENDOR_FEATURE_TEST))

		return mock_get_test_feature(mdata, cmd);



	cmd->return_code = CXL_MBOX_CMD_RC_UNSUPPORTED;



	return -EOPNOTSUPP;

}



static int mock_get_supported_features(struct cxl_mockmem_data *mdata,

				       struct cxl_mbox_cmd *cmd)

{
@@ -1509,6 +1556,9 @@ static int cxl_mock_mbox_send(struct cxl_mailbox *cxl_mbox, 
	case CXL_MBOX_OP_GET_SUPPORTED_FEATURES:

		rc = mock_get_supported_features(mdata, cmd);

		break;

	case CXL_MBOX_OP_GET_FEATURE:

		rc = mock_get_feature(mdata, cmd);

		break;

	default:

		break;

	}
@@ -1556,6 +1606,11 @@ static int cxl_mock_mailbox_create(struct cxl_dev_state *cxlds) 
	return 0;

}



static void cxl_mock_test_feat_init(struct cxl_mockmem_data *mdata)

{

	mdata->test_feat.data = cpu_to_le32(0xdeadbeef);

}



static int cxl_mock_mem_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;
@@ -1651,6 +1706,7 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) 
		dev_dbg(dev, "No CXL FWCTL setup\n");



	cxl_mem_get_event_records(mds, CXLDEV_EVENT_STATUS_ALL);

	cxl_mock_test_feat_init(mdata);



	return 0;

}