path: root/tools/testing/nvdimm/test/ndtest.c

// SPDX-License-Identifier: GPL-2.0-only
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/genalloc.h>
#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>
#include <linux/list_sort.h>
#include <linux/libnvdimm.h>
#include <linux/ndctl.h>
#include <nd-core.h>
#include <linux/printk.h>
#include <linux/seq_buf.h>
#include <linux/papr_scm.h>
#include <uapi/linux/papr_pdsm.h>

#include "../watermark.h"
#include "nfit_test.h"
#include "ndtest.h"

enum {
	DIMM_SIZE = SZ_32M,
	LABEL_SIZE = SZ_128K,
	NUM_INSTANCES = 2,
	NUM_DCR = 4,
	NDTEST_MAX_MAPPING = 6,
};

#define NDTEST_SCM_DIMM_CMD_MASK	   \
	((1ul << ND_CMD_GET_CONFIG_SIZE) | \
	 (1ul << ND_CMD_GET_CONFIG_DATA) | \
	 (1ul << ND_CMD_SET_CONFIG_DATA) | \
	 (1ul << ND_CMD_CALL))

#define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm)			\
	(((node & 0xfff) << 16) | ((socket & 0xf) << 12)		\
	 | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf))

static DEFINE_SPINLOCK(ndtest_lock);
static struct ndtest_priv *instances[NUM_INSTANCES];

static const struct class ndtest_dimm_class = {
	.name = "nfit_test_dimm",
};

static struct gen_pool *ndtest_pool;

static struct ndtest_dimm dimm_group1[] = {
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0),
		.uuid_str = "1e5c75d2-b618-11ea-9aa3-507b9ddc0f72",
		.physical_id = 0,
		.num_formats = 2,
	},
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1),
		.uuid_str = "1c4d43ac-b618-11ea-be80-507b9ddc0f72",
		.physical_id = 1,
		.num_formats = 2,
	},
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0),
		.uuid_str = "a9f17ffc-b618-11ea-b36d-507b9ddc0f72",
		.physical_id = 2,
		.num_formats = 2,
	},
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1),
		.uuid_str = "b6b83b22-b618-11ea-8aae-507b9ddc0f72",
		.physical_id = 3,
		.num_formats = 2,
	},
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(0, 1, 0, 0, 0),
		.uuid_str = "bf9baaee-b618-11ea-b181-507b9ddc0f72",
		.physical_id = 4,
		.num_formats = 2,
	},
};

static struct ndtest_dimm dimm_group2[] = {
	{
		.size = DIMM_SIZE,
		.handle = NFIT_DIMM_HANDLE(1, 0, 0, 0, 0),
		.uuid_str = "ca0817e2-b618-11ea-9db3-507b9ddc0f72",
		.physical_id = 0,
		.num_formats = 1,
		.flags = PAPR_PMEM_UNARMED | PAPR_PMEM_EMPTY |
			 PAPR_PMEM_SAVE_FAILED | PAPR_PMEM_SHUTDOWN_DIRTY |
			 PAPR_PMEM_HEALTH_FATAL,
	},
};

static struct ndtest_mapping region0_mapping[] = {
	{
		.dimm = 0,
		.position = 0,
		.start = 0,
		.size = SZ_16M,
	},
	{
		.dimm = 1,
		.position = 1,
		.start = 0,
		.size = SZ_16M,
	}
};

static struct ndtest_mapping region1_mapping[] = {
	{
		.dimm = 0,
		.position = 0,
		.start = SZ_16M,
		.size = SZ_16M,
	},
	{
		.dimm = 1,
		.position = 1,
		.start = SZ_16M,
		.size = SZ_16M,
	},
	{
		.dimm = 2,
		.position = 2,
		.start = SZ_16M,
		.size = SZ_16M,
	},
	{
		.dimm = 3,
		.position = 3,
		.start = SZ_16M,
		.size = SZ_16M,
	},
};

static struct ndtest_region bus0_regions[] = {
	{
		.type = ND_DEVICE_NAMESPACE_PMEM,
		.num_mappings = ARRAY_SIZE(region0_mapping),
		.mapping = region0_mapping,
		.size = DIMM_SIZE,
		.range_index = 1,
	},
	{
		.type = ND_DEVICE_NAMESPACE_PMEM,
		.num_mappings = ARRAY_SIZE(region1_mapping),
		.mapping = region1_mapping,
		.size = DIMM_SIZE * 2,
		.range_index = 2,
	},
};

static struct ndtest_mapping region6_mapping[] = {
	{
		.dimm = 0,
		.position = 0,
		.start = 0,
		.size = DIMM_SIZE,
	},
};

static struct ndtest_region bus1_regions[] = {
	{
		.type = ND_DEVICE_NAMESPACE_IO,
		.num_mappings = ARRAY_SIZE(region6_mapping),
		.mapping = region6_mapping,
		.size = DIMM_SIZE,
		.range_index = 1,
	},
};

static struct ndtest_config bus_configs[NUM_INSTANCES] = {
	/* bus 1 */
	{
		.dimm_start = 0,
		.dimm_count = ARRAY_SIZE(dimm_group1),
		.dimms = dimm_group1,
		.regions = bus0_regions,
		.num_regions = ARRAY_SIZE(bus0_regions),
	},
	/* bus 2 */
	{
		.dimm_start = ARRAY_SIZE(dimm_group1),
		.dimm_count = ARRAY_SIZE(dimm_group2),
		.dimms = dimm_group2,
		.regions = bus1_regions,
		.num_regions = ARRAY_SIZE(bus1_regions),
	},
};

static inline struct ndtest_priv *to_ndtest_priv(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);

	return container_of(pdev, struct ndtest_priv, pdev);
}

static int ndtest_config_get(struct ndtest_dimm *p, unsigned int buf_len,
			     struct nd_cmd_get_config_data_hdr *hdr)
{
	unsigned int len;

	if ((hdr->in_offset + hdr->in_length) > LABEL_SIZE)