Commit f8d22bf5 authored by Alison Schofield's avatar Alison Schofield Committed by Dan Williams
Browse files

tools/testing/cxl: Mock support for Get Poison List 



Make mock memdevs support the Get Poison List mailbox command.
Return a fake poison error record when the get poison list command
is issued.

This supports testing the kernel tracing and cxl list capabilities
for media errors.

Signed-off-by: default avatarAlison Schofield <alison.schofield@intel.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarIra Weiny <ira.weiny@intel.com>
Reviewed-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/14d661ce3e3a32b7d8e76b8ecc5eb88343b3d09c.1681838292.git.alison.schofield@intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 28a3ae4f

tools/testing/cxl/test/mem.c

+42 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#include <linux/delay.h>

#include <linux/sizes.h>

#include <linux/bits.h>

#include <asm/unaligned.h>

#include <cxlmem.h>



#include "trace.h"
@@ -40,6 +41,10 @@ static struct cxl_cel_entry mock_cel[] = { 
		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO),

		.effect = cpu_to_le16(0),

	},

	{

		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_POISON),

		.effect = cpu_to_le16(0),

	},

};



/* See CXL 2.0 Table 181 Get Health Info Output Payload */
@@ -471,6 +476,8 @@ static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd) 
			cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),

	};



	put_unaligned_le24(CXL_POISON_LIST_MAX, id.poison_list_max_mer);



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

		return -EINVAL;
@@ -888,6 +895,34 @@ static int mock_health_info(struct cxl_dev_state *cxlds, 
	return 0;

}



static int mock_get_poison(struct cxl_dev_state *cxlds,

			   struct cxl_mbox_cmd *cmd)

{

	struct cxl_mbox_poison_in *pi = cmd->payload_in;



	/* 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;



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

	cmd->size_out = sizeof(mock_plist);

	return 0;

}



static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)

{

	struct device *dev = cxlds->dev;
@@ -942,6 +977,9 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd * 
	case CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE:

		rc = mock_passphrase_secure_erase(cxlds, cmd);

		break;

	case CXL_MBOX_OP_GET_POISON:

		rc = mock_get_poison(cxlds, cmd);

		break;

	default:

		break;

	}
@@ -1010,6 +1048,10 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) 
	if (rc)

		return rc;



	rc = cxl_poison_state_init(cxlds);

	if (rc)

		return rc;



	rc = cxl_dev_state_identify(cxlds);

	if (rc)

		return rc;