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tools/testing/cxl: Add partition support

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In support of testing DPA allocation mechanisms in the CXL core, the
cxl_test environment needs to support establishing and retrieving the
'pmem partition boundary.

Replace the platform_device_add_resources() method for delineating DPA
within an endpoint with an emulated DEV_SIZE amount of partitionable
capacity. Set DEV_SIZE such that an endpoint has enough capacity to
simultaneously participate in 8 distinct regions.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/165603887411.551046.13234212587991192347.stgit@dwillia2-xfh
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2022-05-23 23:26:11 -07:00
parent 855c90d305
commit e7ad1bf683
4 changed files with 39 additions and 72 deletions
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7
drivers/cxl/core/mbox.c
View File

@ -718,12 +718,7 @@ EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL);
*/
static int cxl_mem_get_partition_info(struct cxl_dev_state *cxlds)
{
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
__le64 next_volatile_cap;
__le64 next_persistent_cap;
} __packed pi;
struct cxl_mbox_get_partition_info pi;
int rc;
rc = cxl_mbox_send_cmd(cxlds, CXL_MBOX_OP_GET_PARTITION_INFO, NULL, 0,

7
drivers/cxl/cxlmem.h
View File

@ -301,6 +301,13 @@ struct cxl_mbox_identify {
u8 qos_telemetry_caps;
} __packed;
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
__le64 next_volatile_cap;
__le64 next_persistent_cap;
} __packed;
struct cxl_mbox_get_lsa {
__le32 offset;
__le32 length;

40
tools/testing/cxl/test/cxl.c
View File

@ -569,44 +569,6 @@ static void mock_companion(struct acpi_device *adev, struct device *dev)
#define SZ_512G (SZ_64G * 8)
#endif
static struct platform_device *alloc_memdev(int id)
{
struct resource res[] = {
[0] = {
.flags = IORESOURCE_MEM,
},
[1] = {
.flags = IORESOURCE_MEM,
.desc = IORES_DESC_PERSISTENT_MEMORY,
},
};
struct platform_device *pdev;
int i, rc;
for (i = 0; i < ARRAY_SIZE(res); i++) {
struct cxl_mock_res *r = alloc_mock_res(SZ_256M);
if (!r)
return NULL;
res[i].start = r->range.start;
res[i].end = r->range.end;
}
pdev = platform_device_alloc("cxl_mem", id);
if (!pdev)
return NULL;
rc = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
if (rc)
goto err;
return pdev;
err:
platform_device_put(pdev);
return NULL;
}
static __init int cxl_test_init(void)
{
int rc, i;
@ -709,7 +671,7 @@ static __init int cxl_test_init(void)
struct platform_device *dport = cxl_switch_dport[i];
struct platform_device *pdev;
pdev = alloc_memdev(i);
pdev = platform_device_alloc("cxl_mem", i);
if (!pdev)
goto err_mem;
pdev->dev.parent = &dport->dev;

57
tools/testing/cxl/test/mem.c
View File

@ -10,6 +10,7 @@
#include <cxlmem.h>
#define LSA_SIZE SZ_128K
#define DEV_SIZE SZ_2G
#define EFFECT(x) (1U << x)
static struct cxl_cel_entry mock_cel[] = {
@ -25,6 +26,10 @@ static struct cxl_cel_entry mock_cel[] = {
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_LSA),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_GET_PARTITION_INFO),
.effect = cpu_to_le16(0),
},
{
.opcode = cpu_to_le16(CXL_MBOX_OP_SET_LSA),
.effect = cpu_to_le16(EFFECT(1) | EFFECT(2)),
@ -97,46 +102,41 @@ static int mock_get_log(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
{
struct platform_device *pdev = to_platform_device(cxlds->dev);
struct cxl_mbox_identify id = {
.fw_revision = { "mock fw v1 " },
.lsa_size = cpu_to_le32(LSA_SIZE),
/* FIXME: Add partition support */
.partition_align = cpu_to_le64(0),
.partition_align =
cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER),
.total_capacity =
cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
};
u64 capacity = 0;
int i;
if (cmd->size_out < sizeof(id))
return -EINVAL;
for (i = 0; i < 2; i++) {
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
if (!res)
break;
capacity += resource_size(res) / CXL_CAPACITY_MULTIPLIER;
if (le64_to_cpu(id.partition_align))
continue;
if (res->desc == IORES_DESC_PERSISTENT_MEMORY)
id.persistent_capacity = cpu_to_le64(
resource_size(res) / CXL_CAPACITY_MULTIPLIER);
else
id.volatile_capacity = cpu_to_le64(
resource_size(res) / CXL_CAPACITY_MULTIPLIER);
}
id.total_capacity = cpu_to_le64(capacity);
memcpy(cmd->payload_out, &id, sizeof(id));
return 0;
}
static int mock_partition_info(struct cxl_dev_state *cxlds,
struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_get_partition_info pi = {
.active_volatile_cap =
cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
.active_persistent_cap =
cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
};
if (cmd->size_out < sizeof(pi))
return -EINVAL;
memcpy(cmd->payload_out, &pi, sizeof(pi));
return 0;
}
static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
{
struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in;
@ -221,6 +221,9 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
case CXL_MBOX_OP_GET_LSA:
rc = mock_get_lsa(cxlds, cmd);
break;
case CXL_MBOX_OP_GET_PARTITION_INFO:
rc = mock_partition_info(cxlds, cmd);
break;
case CXL_MBOX_OP_SET_LSA:
rc = mock_set_lsa(cxlds, cmd);
break;