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tools/testing/cxl: Mock the Inject Poison mailbox command

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Mock the injection of poison by storing the device:address entries in
mock_poison_list[]. Enforce a limit of 8 poison injections per memdev
device and 128 total entries for the cxl_test mock driver.

Introducing the mock_poison[] list here, makes it available for use in
the mock of Clear Poison, and the mock of Get Poison List.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/f6b7f03541eaa8c2260d3eafadd04afe3f0d7962.1681874357.git.alison.schofield@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Alison Schofield 2023-04-18 20:26:30 -07:00 committed by Dan Williams
parent 50d527f52c
commit 371c16101e
1 changed files with 77 additions and 0 deletions
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77
tools/testing/cxl/test/mem.c
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@ -16,6 +16,9 @@
#define DEV_SIZE SZ_2G
#define EFFECT(x) (1U << x)
#define MOCK_INJECT_DEV_MAX 8
#define MOCK_INJECT_TEST_MAX 128
static struct cxl_cel_entry mock_cel[] = {
{
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS),
@ -45,6 +48,10 @@ static struct cxl_cel_entry mock_cel[] = {
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_POISON),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_INJECT_POISON),
.effect = cpu_to_le16(0),
},
};
/* See CXL 2.0 Table 181 Get Health Info Output Payload */
@ -474,6 +481,7 @@ static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER),
.total_capacity =
cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
.inject_poison_limit = cpu_to_le16(MOCK_INJECT_DEV_MAX),
};
put_unaligned_le24(CXL_POISON_LIST_MAX, id.poison_list_max_mer);
@ -895,6 +903,11 @@ static int mock_health_info(struct cxl_dev_state *cxlds,
return 0;
}
static struct mock_poison {
struct cxl_dev_state *cxlds;
u64 dpa;
} mock_poison_list[MOCK_INJECT_TEST_MAX];
static int mock_get_poison(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
@ -923,6 +936,67 @@ static int mock_get_poison(struct cxl_dev_state *cxlds,
return 0;
}
static bool mock_poison_dev_max_injected(struct cxl_dev_state *cxlds)
{
int count = 0;
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds == cxlds)
count++;
}
return (count >= MOCK_INJECT_DEV_MAX);
}
static bool mock_poison_add(struct cxl_dev_state *cxlds, u64 dpa)
{
if (mock_poison_dev_max_injected(cxlds)) {
dev_dbg(cxlds->dev,
"Device poison injection limit has been reached: %d\n",
MOCK_INJECT_DEV_MAX);
return false;
}
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (!mock_poison_list[i].cxlds) {
mock_poison_list[i].cxlds = cxlds;
mock_poison_list[i].dpa = dpa;
return true;
}
}
dev_dbg(cxlds->dev,
"Mock test poison injection limit has been reached: %d\n",
MOCK_INJECT_TEST_MAX);
return false;
}
static bool mock_poison_found(struct cxl_dev_state *cxlds, u64 dpa)
{
for (int i = 0; i < MOCK_INJECT_TEST_MAX; i++) {
if (mock_poison_list[i].cxlds == cxlds &&
mock_poison_list[i].dpa == dpa)
return true;
}
return false;
}
static int mock_inject_poison(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_inject_poison *pi = cmd->payload_in;
u64 dpa = le64_to_cpu(pi->address);
if (mock_poison_found(cxlds, dpa)) {
/* Not an error to inject poison if already poisoned */
dev_dbg(cxlds->dev, "DPA: 0x%llx already poisoned\n", dpa);
return 0;
}
if (!mock_poison_add(cxlds, dpa))
return -ENXIO;
return 0;
}
static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
{
struct device *dev = cxlds->dev;
@ -980,6 +1054,9 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
case CXL_MBOX_OP_GET_POISON:
rc = mock_get_poison(cxlds, cmd);
break;
case CXL_MBOX_OP_INJECT_POISON:
rc = mock_inject_poison(cxlds, cmd);
break;
default:
break;
}