Commit 8eac7ea7 authored by Alison Schofield's avatar Alison Schofield Committed by Dan Williams
Browse files

tools/testing/cxl: Use injected poison for get poison list 



Prior to poison inject support, the mock of 'Get Poison List'
returned a poison list containing a single mocked error record.

Following the addition of poison inject and clear support to the
mock driver, use the mock_poison_list[], rather than faking an
error record. Mock_poison_list[] list tracks the actual poison
inject and clear requests issued by userspace.

Signed-off-by: default avatarAlison Schofield <alison.schofield@intel.com>
Reviewed-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/0f4242c81821f4982b02cb1009c22783ef66b2f1.1681874357.git.alison.schofield@intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 6ec4b6d2

tools/testing/cxl/test/mem.c

+43 −19
Original line number Diff line number Diff line
@@ -912,31 +912,55 @@ static struct mock_poison { 
	u64 dpa;

} mock_poison_list[MOCK_INJECT_TEST_MAX];



static struct cxl_mbox_poison_out *

cxl_get_injected_po(struct cxl_dev_state *cxlds, u64 offset, u64 length)

{

	struct cxl_mbox_poison_out *po;

	int nr_records = 0;

	u64 dpa;



	po = kzalloc(struct_size(po, record, MOCK_INJECT_DEV_MAX), GFP_KERNEL);

	if (!po)

		return NULL;



	for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {

		if (mock_poison_list[i].cxlds != cxlds)

			continue;

		if (mock_poison_list[i].dpa < offset ||

		    mock_poison_list[i].dpa > offset + length - 1)

			continue;



		dpa = mock_poison_list[i].dpa + CXL_POISON_SOURCE_INJECTED;

		po->record[nr_records].address = cpu_to_le64(dpa);

		po->record[nr_records].length = cpu_to_le32(1);

		nr_records++;

		if (nr_records == MOCK_INJECT_DEV_MAX)

			break;

	}



	/* Always return count, even when zero */

	po->count = cpu_to_le16(nr_records);



	return po;

}



static int mock_get_poison(struct cxl_dev_state *cxlds,

			   struct cxl_mbox_cmd *cmd)

{

	struct cxl_mbox_poison_in *pi = cmd->payload_in;

	struct cxl_mbox_poison_out *po;

	u64 offset = le64_to_cpu(pi->offset);

	u64 length = le64_to_cpu(pi->length);

	int nr_records;



	/* Mock one poison record at pi.offset for 64 bytes */

	struct {

		struct cxl_mbox_poison_out po;

		struct cxl_poison_record record;

	} __packed mock_plist = {

		.po = {

			.count = cpu_to_le16(1),

		},

		.record = {

			.length = cpu_to_le32(1),

			.address = cpu_to_le64(le64_to_cpu(pi->offset) +

					       CXL_POISON_SOURCE_INJECTED),

		},

	};



	if (cmd->size_out < sizeof(mock_plist))

		return -EINVAL;

	po = cxl_get_injected_po(cxlds, offset, length);

	if (!po)

		return -ENOMEM;

	nr_records = le16_to_cpu(po->count);

	memcpy(cmd->payload_out, po, struct_size(po, record, nr_records));

	cmd->size_out = struct_size(po, record, nr_records);

	kfree(po);



	memcpy(cmd->payload_out, &mock_plist, sizeof(mock_plist));

	cmd->size_out = sizeof(mock_plist);

	return 0;

}