'libnvdimm' is the first driver sub-system in the kernel to implement mocking for unit test coverage. The nfit_test module gets built as an external module and arranges for external module replacements of nfit, libnvdimm, nd_pmem, and nd_blk. These replacements use the linker --wrap option to redirect calls to ioremap() + request_mem_region() to custom defined unit test resources. The end result is a fully functional nvdimm_bus, as far as userspace is concerned, but with the capability to perform otherwise destructive tests on emulated resources. Q: Why not use QEMU for this emulation? QEMU is not suitable for unit testing. QEMU's role is to faithfully emulate the platform. A unit test's role is to unfaithfully implement the platform with the goal of triggering bugs in the corners of the sub-system implementation. As bugs are discovered in platforms, or the sub-system itself, the unit tests are extended to backstop a fix with a reproducer unit test. Another problem with QEMU is that it would require coordination of 3 software projects instead of 2 (kernel + libndctl [1]) to maintain and execute the tests. The chances for bit rot and the difficulty of getting the tests running goes up non-linearly the more components involved. Q: Why submit this to the kernel tree instead of external modules in libndctl? Simple, to alleviate the same risk that out-of-tree external modules face. Updates to drivers/nvdimm/ can be immediately evaluated to see if they have any impact on tools/testing/nvdimm/. Q: What are the negative implications of merging this? It is a unique maintenance burden because the purpose of mocking an interface to enable a unit test is to purposefully short circuit the semantics of a routine to enable testing. For example __wrap_ioremap_cache() fakes the pmem driver into "ioremap()'ing" a test resource buffer allocated by dma_alloc_coherent(). The future maintenance burden hits when someone changes the semantics of ioremap_cache() and wonders what the implications are for the unit test. [1]: https://github.com/pmem/ndctl Cc: <linux-acpi@xxxxxxxxxxxxxxx> Cc: Lv Zheng <lv.zheng@xxxxxxxxx> Cc: Robert Moore <robert.moore@xxxxxxxxx> Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> --- drivers/acpi/nfit.c | 12 drivers/acpi/nfit.h | 6 tools/testing/nvdimm/Kbuild | 40 + tools/testing/nvdimm/Makefile | 7 tools/testing/nvdimm/config_check.c | 15 tools/testing/nvdimm/test/Kbuild | 8 tools/testing/nvdimm/test/iomap.c | 151 ++++ tools/testing/nvdimm/test/nfit.c | 1112 +++++++++++++++++++++++++++++++++ tools/testing/nvdimm/test/nfit_test.h | 29 + 9 files changed, 1376 insertions(+), 4 deletions(-) create mode 100644 tools/testing/nvdimm/Kbuild create mode 100644 tools/testing/nvdimm/Makefile create mode 100644 tools/testing/nvdimm/config_check.c create mode 100644 tools/testing/nvdimm/test/Kbuild create mode 100644 tools/testing/nvdimm/test/iomap.c create mode 100644 tools/testing/nvdimm/test/nfit.c create mode 100644 tools/testing/nvdimm/test/nfit_test.h diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index 3a77709fd394..9363e4b0e6a7 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -29,10 +29,11 @@ MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status"); static u8 nfit_uuid[NFIT_UUID_MAX][16]; -static const u8 *to_nfit_uuid(enum nfit_uuids id) +const u8 *to_nfit_uuid(enum nfit_uuids id) { return nfit_uuid[id]; } +EXPORT_SYMBOL(to_nfit_uuid); static struct acpi_nfit_desc *to_acpi_nfit_desc( struct nvdimm_bus_descriptor *nd_desc) @@ -577,11 +578,12 @@ static struct attribute_group acpi_nfit_attribute_group = { .attrs = acpi_nfit_attributes, }; -static const struct attribute_group *acpi_nfit_attribute_groups[] = { +const struct attribute_group *acpi_nfit_attribute_groups[] = { &nvdimm_bus_attribute_group, &acpi_nfit_attribute_group, NULL, }; +EXPORT_SYMBOL_GPL(acpi_nfit_attribute_groups); static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev) { @@ -1319,7 +1321,7 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc, ndbr_desc = to_blk_region_desc(ndr_desc); ndbr_desc->enable = acpi_nfit_blk_region_enable; ndbr_desc->disable = acpi_nfit_blk_region_disable; - ndbr_desc->do_io = acpi_nfit_blk_region_do_io; + ndbr_desc->do_io = acpi_desc->blk_do_io; if (!nvdimm_blk_region_create(acpi_desc->nvdimm_bus, ndr_desc)) return -ENOMEM; break; @@ -1403,7 +1405,7 @@ static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc) return 0; } -static int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) +int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) { struct device *dev = acpi_desc->dev; const void *end; @@ -1442,6 +1444,7 @@ static int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) return acpi_nfit_register_regions(acpi_desc); } +EXPORT_SYMBOL_GPL(acpi_nfit_init); static int acpi_nfit_add(struct acpi_device *adev) { @@ -1466,6 +1469,7 @@ static int acpi_nfit_add(struct acpi_device *adev) dev_set_drvdata(dev, acpi_desc); acpi_desc->dev = dev; acpi_desc->nfit = (struct acpi_table_nfit *) tbl; + acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io; nd_desc = &acpi_desc->nd_desc; nd_desc->provider_name = "ACPI.NFIT"; nd_desc->ndctl = acpi_nfit_ctl; diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h index 7bd38b7baf39..c62fffea8423 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit.h @@ -93,6 +93,8 @@ struct acpi_nfit_desc { struct nvdimm_bus *nvdimm_bus; struct device *dev; unsigned long dimm_dsm_force_en; + int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, + void *iobuf, u64 len, int rw); }; enum nd_blk_mmio_selector { @@ -146,4 +148,8 @@ static inline struct acpi_nfit_desc *to_acpi_desc( { return container_of(nd_desc, struct acpi_nfit_desc, nd_desc); } + +const u8 *to_nfit_uuid(enum nfit_uuids id); +int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz); +extern const struct attribute_group *acpi_nfit_attribute_groups[]; #endif /* __NFIT_H__ */ diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild new file mode 100644 index 000000000000..df624d7ea652 --- /dev/null +++ b/tools/testing/nvdimm/Kbuild @@ -0,0 +1,40 @@ +ldflags-y += --wrap=ioremap_cache +ldflags-y += --wrap=ioremap_nocache +ldflags-y += --wrap=iounmap +ldflags-y += --wrap=__request_region +ldflags-y += --wrap=__release_region + +DRIVERS := ../../../drivers +NVDIMM_SRC := $(DRIVERS)/nvdimm +ACPI_SRC := $(DRIVERS)/acpi + +obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o +obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o +obj-$(CONFIG_ND_BTT) += nd_btt.o +obj-$(CONFIG_ND_BLK) += nd_blk.o +obj-$(CONFIG_ACPI_NFIT) += nfit.o + +nfit-y := $(ACPI_SRC)/nfit.o +nfit-y += config_check.o + +nd_pmem-y := $(NVDIMM_SRC)/pmem.o +nd_pmem-y += config_check.o + +nd_btt-y := $(NVDIMM_SRC)/btt.o +nd_btt-y += config_check.o + +nd_blk-y := $(NVDIMM_SRC)/blk.o +nd_blk-y += config_check.o + +libnvdimm-y := $(NVDIMM_SRC)/core.o +libnvdimm-y += $(NVDIMM_SRC)/bus.o +libnvdimm-y += $(NVDIMM_SRC)/dimm_devs.o +libnvdimm-y += $(NVDIMM_SRC)/dimm.o +libnvdimm-y += $(NVDIMM_SRC)/region_devs.o +libnvdimm-y += $(NVDIMM_SRC)/region.o +libnvdimm-y += $(NVDIMM_SRC)/namespace_devs.o +libnvdimm-y += $(NVDIMM_SRC)/label.o +libnvdimm-$(CONFIG_ND_BTT_DEVS) += $(NVDIMM_SRC)/btt_devs.o +libnvdimm-y += config_check.o + +obj-m += test/ diff --git a/tools/testing/nvdimm/Makefile b/tools/testing/nvdimm/Makefile new file mode 100644 index 000000000000..3dfe024b4e7e --- /dev/null +++ b/tools/testing/nvdimm/Makefile @@ -0,0 +1,7 @@ +KDIR ?= ../../../ + +default: + $(MAKE) -C $(KDIR) M=$$PWD + +install: default + $(MAKE) -C $(KDIR) M=$$PWD modules_install diff --git a/tools/testing/nvdimm/config_check.c b/tools/testing/nvdimm/config_check.c new file mode 100644 index 000000000000..f2c7615554eb --- /dev/null +++ b/tools/testing/nvdimm/config_check.c @@ -0,0 +1,15 @@ +#include <linux/kconfig.h> +#include <linux/bug.h> + +void check(void) +{ + /* + * These kconfig symbols must be set to "m" for nfit_test to + * load and operate. + */ + BUILD_BUG_ON(!IS_MODULE(CONFIG_LIBNVDIMM)); + BUILD_BUG_ON(!IS_MODULE(CONFIG_BLK_DEV_PMEM)); + BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BTT)); + BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BLK)); + BUILD_BUG_ON(!IS_MODULE(CONFIG_ACPI_NFIT)); +} diff --git a/tools/testing/nvdimm/test/Kbuild b/tools/testing/nvdimm/test/Kbuild new file mode 100644 index 000000000000..9241064970fe --- /dev/null +++ b/tools/testing/nvdimm/test/Kbuild @@ -0,0 +1,8 @@ +ccflags-y := -I$(src)/../../../../drivers/nvdimm/ +ccflags-y += -I$(src)/../../../../drivers/acpi/ + +obj-m += nfit_test.o +obj-m += nfit_test_iomap.o + +nfit_test-y := nfit.o +nfit_test_iomap-y := iomap.o diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c new file mode 100644 index 000000000000..c85a6f6ba559 --- /dev/null +++ b/tools/testing/nvdimm/test/iomap.c @@ -0,0 +1,151 @@ +/* + * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/rculist.h> +#include <linux/export.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/io.h> +#include "nfit_test.h" + +static LIST_HEAD(iomap_head); + +static struct iomap_ops { + nfit_test_lookup_fn nfit_test_lookup; + struct list_head list; +} iomap_ops = { + .list = LIST_HEAD_INIT(iomap_ops.list), +}; + +void nfit_test_setup(nfit_test_lookup_fn lookup) +{ + iomap_ops.nfit_test_lookup = lookup; + list_add_rcu(&iomap_ops.list, &iomap_head); +} +EXPORT_SYMBOL(nfit_test_setup); + +void nfit_test_teardown(void) +{ + list_del_rcu(&iomap_ops.list); + synchronize_rcu(); +} +EXPORT_SYMBOL(nfit_test_teardown); + +static struct nfit_test_resource *get_nfit_res(resource_size_t resource) +{ + struct iomap_ops *ops; + + ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list); + if (ops) + return ops->nfit_test_lookup(resource); + return NULL; +} + +void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size, + void __iomem *(*fallback_fn)(resource_size_t, unsigned long)) +{ + struct nfit_test_resource *nfit_res; + + rcu_read_lock(); + nfit_res = get_nfit_res(offset); + rcu_read_unlock(); + if (nfit_res) + return (void __iomem *) nfit_res->buf + offset + - nfit_res->res->start; + return fallback_fn(offset, size); +} + +void __iomem *__wrap_ioremap_cache(resource_size_t offset, unsigned long size) +{ + return __nfit_test_ioremap(offset, size, ioremap_cache); +} +EXPORT_SYMBOL(__wrap_ioremap_cache); + +void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size) +{ + return __nfit_test_ioremap(offset, size, ioremap_nocache); +} +EXPORT_SYMBOL(__wrap_ioremap_nocache); + +void __wrap_iounmap(volatile void __iomem *addr) +{ + struct nfit_test_resource *nfit_res; + + rcu_read_lock(); + nfit_res = get_nfit_res((unsigned long) addr); + rcu_read_unlock(); + if (nfit_res) + return; + return iounmap(addr); +} +EXPORT_SYMBOL(__wrap_iounmap); + +struct resource *__wrap___request_region(struct resource *parent, + resource_size_t start, resource_size_t n, const char *name, + int flags) +{ + struct nfit_test_resource *nfit_res; + + if (parent == &iomem_resource) { + rcu_read_lock(); + nfit_res = get_nfit_res(start); + rcu_read_unlock(); + if (nfit_res) { + struct resource *res = nfit_res->res + 1; + + if (start + n > nfit_res->res->start + + resource_size(nfit_res->res)) { + pr_debug("%s: start: %llx n: %llx overflow: %pr\n", + __func__, start, n, + nfit_res->res); + return NULL; + } + + res->start = start; + res->end = start + n - 1; + res->name = name; + res->flags = resource_type(parent); + res->flags |= IORESOURCE_BUSY | flags; + pr_debug("%s: %pr\n", __func__, res); + return res; + } + } + return __request_region(parent, start, n, name, flags); +} +EXPORT_SYMBOL(__wrap___request_region); + +void __wrap___release_region(struct resource *parent, resource_size_t start, + resource_size_t n) +{ + struct nfit_test_resource *nfit_res; + + if (parent == &iomem_resource) { + rcu_read_lock(); + nfit_res = get_nfit_res(start); + rcu_read_unlock(); + if (nfit_res) { + struct resource *res = nfit_res->res + 1; + + if (start != res->start || resource_size(res) != n) + pr_info("%s: start: %llx n: %llx mismatch: %pr\n", + __func__, start, n, res); + else + memset(res, 0, sizeof(*res)); + return; + } + } + __release_region(parent, start, n); +} +EXPORT_SYMBOL(__wrap___release_region); + +MODULE_LICENSE("GPL v2"); diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c new file mode 100644 index 000000000000..416f8fbf9881 --- /dev/null +++ b/tools/testing/nvdimm/test/nfit.c @@ -0,0 +1,1112 @@ +/* + * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/libnvdimm.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/ndctl.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <nfit.h> +#include <nd.h> +#include "nfit_test.h" + +/* + * Generate an NFIT table to describe the following topology: + * + * BUS0: Interleaved PMEM regions, and aliasing with BLK regions + * + * (a) (b) DIMM BLK-REGION + * +----------+--------------+----------+---------+ + * +------+ | blk2.0 | pm0.0 | blk2.1 | pm1.0 | 0 region2 + * | imc0 +--+- - - - - region0 - - - -+----------+ + + * +--+---+ | blk3.0 | pm0.0 | blk3.1 | pm1.0 | 1 region3 + * | +----------+--------------v----------v v + * +--+---+ | | + * | cpu0 | region1 + * +--+---+ | | + * | +-------------------------^----------^ ^ + * +--+---+ | blk4.0 | pm1.0 | 2 region4 + * | imc1 +--+-------------------------+----------+ + + * +------+ | blk5.0 | pm1.0 | 3 region5 + * +-------------------------+----------+-+-------+ + * + * *) In this layout we have four dimms and two memory controllers in one + * socket. Each unique interface (BLK or PMEM) to DPA space + * is identified by a region device with a dynamically assigned id. + * + * *) The first portion of dimm0 and dimm1 are interleaved as REGION0. + * A single PMEM namespace "pm0.0" is created using half of the + * REGION0 SPA-range. REGION0 spans dimm0 and dimm1. PMEM namespace + * allocate from from the bottom of a region. The unallocated + * portion of REGION0 aliases with REGION2 and REGION3. That + * unallacted capacity is reclaimed as BLK namespaces ("blk2.0" and + * "blk3.0") starting at the base of each DIMM to offset (a) in those + * DIMMs. "pm0.0", "blk2.0" and "blk3.0" are free-form readable + * names that can be assigned to a namespace. + * + * *) In the last portion of dimm0 and dimm1 we have an interleaved + * SPA range, REGION1, that spans those two dimms as well as dimm2 + * and dimm3. Some of REGION1 allocated to a PMEM namespace named + * "pm1.0" the rest is reclaimed in 4 BLK namespaces (for each + * dimm in the interleave set), "blk2.1", "blk3.1", "blk4.0", and + * "blk5.0". + * + * *) The portion of dimm2 and dimm3 that do not participate in the + * REGION1 interleaved SPA range (i.e. the DPA address below offset + * (b) are also included in the "blk4.0" and "blk5.0" namespaces. + * Note, that BLK namespaces need not be contiguous in DPA-space, and + * can consume aliased capacity from multiple interleave sets. + * + * BUS1: Legacy NVDIMM (single contiguous range) + * + * region2 + * +---------------------+ + * |---------------------| + * || pm2.0 || + * |---------------------| + * +---------------------+ + * + * *) A NFIT-table may describe a simple system-physical-address range + * with no BLK aliasing. This type of region may optionally + * reference an NVDIMM. + */ +enum { + NUM_PM = 2, + NUM_DCR = 4, + NUM_BDW = NUM_DCR, + NUM_SPA = NUM_PM + NUM_DCR + NUM_BDW, + NUM_MEM = NUM_DCR + NUM_BDW + 2 /* spa0 iset */ + 4 /* spa1 iset */, + DIMM_SIZE = SZ_32M, + LABEL_SIZE = SZ_128K, + SPA0_SIZE = DIMM_SIZE, + SPA1_SIZE = DIMM_SIZE*2, + SPA2_SIZE = DIMM_SIZE, + BDW_SIZE = 64 << 8, + DCR_SIZE = 12, + NUM_NFITS = 2, /* permit testing multiple NFITs per system */ +}; + +struct nfit_test_dcr { + __le64 bdw_addr; + __le32 bdw_status; + __u8 aperature[BDW_SIZE]; +}; + +#define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm) \ + (((node & 0xfff) << 16) | ((socket & 0xf) << 12) \ + | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf)) + +static u32 handle[NUM_DCR] = { + [0] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0), + [1] = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1), + [2] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0), + [3] = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1), +}; + +struct nfit_test { + struct acpi_nfit_desc acpi_desc; + struct platform_device pdev; + struct list_head resources; + void *nfit_buf; + dma_addr_t nfit_dma; + size_t nfit_size; + int num_dcr; + int num_pm; + void **dimm; + dma_addr_t *dimm_dma; + void **label; + dma_addr_t *label_dma; + void **spa_set; + dma_addr_t *spa_set_dma; + struct nfit_test_dcr **dcr; + dma_addr_t *dcr_dma; + int (*alloc)(struct nfit_test *t); + void (*setup)(struct nfit_test *t); +}; + +static struct nfit_test *to_nfit_test(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + + return container_of(pdev, struct nfit_test, pdev); +} + +static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc, + struct nvdimm *nvdimm, unsigned int cmd, void *buf, + unsigned int buf_len) +{ + struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); + struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc); + struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); + int i, rc; + + if (!nfit_mem || !test_bit(cmd, &nfit_mem->dsm_mask)) + return -ENXIO; + + /* lookup label space for the given dimm */ + for (i = 0; i < ARRAY_SIZE(handle); i++) + if (__to_nfit_memdev(nfit_mem)->device_handle == handle[i]) + break; + if (i >= ARRAY_SIZE(handle)) + return -ENXIO; + + switch (cmd) { + case ND_CMD_GET_CONFIG_SIZE: { + struct nd_cmd_get_config_size *nd_cmd = buf; + + if (buf_len < sizeof(*nd_cmd)) + return -EINVAL; + nd_cmd->status = 0; + nd_cmd->config_size = LABEL_SIZE; + nd_cmd->max_xfer = SZ_4K; + rc = 0; + break; + } + case ND_CMD_GET_CONFIG_DATA: { + struct nd_cmd_get_config_data_hdr *nd_cmd = buf; + unsigned int len, offset = nd_cmd->in_offset; + + if (buf_len < sizeof(*nd_cmd)) + return -EINVAL; + if (offset >= LABEL_SIZE) + return -EINVAL; + if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len) + return -EINVAL; + + nd_cmd->status = 0; + len = min(nd_cmd->in_length, LABEL_SIZE - offset); + memcpy(nd_cmd->out_buf, t->label[i] + offset, len); + rc = buf_len - sizeof(*nd_cmd) - len; + break; + } + case ND_CMD_SET_CONFIG_DATA: { + struct nd_cmd_set_config_hdr *nd_cmd = buf; + unsigned int len, offset = nd_cmd->in_offset; + u32 *status; + + if (buf_len < sizeof(*nd_cmd)) + return -EINVAL; + if (offset >= LABEL_SIZE) + return -EINVAL; + if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len) + return -EINVAL; + + status = buf + nd_cmd->in_length + sizeof(*nd_cmd); + *status = 0; + len = min(nd_cmd->in_length, LABEL_SIZE - offset); + memcpy(t->label[i] + offset, nd_cmd->in_buf, len); + rc = buf_len - sizeof(*nd_cmd) - (len + 4); + break; + } + default: + return -ENOTTY; + } + + return rc; +} + +static DEFINE_SPINLOCK(nfit_test_lock); +static struct nfit_test *instances[NUM_NFITS]; + +static void release_nfit_res(void *data) +{ + struct nfit_test_resource *nfit_res = data; + struct resource *res = nfit_res->res; + + spin_lock(&nfit_test_lock); + list_del(&nfit_res->list); + spin_unlock(&nfit_test_lock); + + if (is_vmalloc_addr(nfit_res->buf)) + vfree(nfit_res->buf); + else + dma_free_coherent(nfit_res->dev, resource_size(res), + nfit_res->buf, res->start); + kfree(res); + kfree(nfit_res); +} + +static void *__test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma, + void *buf) +{ + struct device *dev = &t->pdev.dev; + struct resource *res = kzalloc(sizeof(*res) * 2, GFP_KERNEL); + struct nfit_test_resource *nfit_res = kzalloc(sizeof(*nfit_res), + GFP_KERNEL); + int rc; + + if (!res || !buf || !nfit_res) + goto err; + rc = devm_add_action(dev, release_nfit_res, nfit_res); + if (rc) + goto err; + INIT_LIST_HEAD(&nfit_res->list); + memset(buf, 0, size); + nfit_res->dev = dev; + nfit_res->buf = buf; + nfit_res->res = res; + res->start = *dma; + res->end = *dma + size - 1; + res->name = "NFIT"; + spin_lock(&nfit_test_lock); + list_add(&nfit_res->list, &t->resources); + spin_unlock(&nfit_test_lock); + + return nfit_res->buf; + err: + if (buf && !is_vmalloc_addr(buf)) + dma_free_coherent(dev, size, buf, *dma); + else if (buf) + vfree(buf); + kfree(res); + kfree(nfit_res); + return NULL; +} + +static void *test_alloc(struct nfit_test *t, size_t size, dma_addr_t *dma) +{ + void *buf = vmalloc(size); + + *dma = (unsigned long) buf; + return __test_alloc(t, size, dma, buf); +} + +static void *test_alloc_coherent(struct nfit_test *t, size_t size, + dma_addr_t *dma) +{ + struct device *dev = &t->pdev.dev; + void *buf = dma_alloc_coherent(dev, size, dma, GFP_KERNEL); + + return __test_alloc(t, size, dma, buf); +} + +static struct nfit_test_resource *nfit_test_lookup(resource_size_t addr) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(instances); i++) { + struct nfit_test_resource *n, *nfit_res = NULL; + struct nfit_test *t = instances[i]; + + if (!t) + continue; + spin_lock(&nfit_test_lock); + list_for_each_entry(n, &t->resources, list) { + if (addr >= n->res->start && (addr < n->res->start + + resource_size(n->res))) { + nfit_res = n; + break; + } else if (addr >= (unsigned long) n->buf + && (addr < (unsigned long) n->buf + + resource_size(n->res))) { + nfit_res = n; + break; + } + } + spin_unlock(&nfit_test_lock); + if (nfit_res) + return nfit_res; + } + + return NULL; +} + +static int nfit_test0_alloc(struct nfit_test *t) +{ + size_t nfit_size = sizeof(struct acpi_table_nfit) + + sizeof(struct acpi_nfit_system_address) * NUM_SPA + + sizeof(struct acpi_nfit_memory_map) * NUM_MEM + + sizeof(struct acpi_nfit_control_region) * NUM_DCR + + sizeof(struct acpi_nfit_data_region) * NUM_BDW; + int i; + + t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma); + if (!t->nfit_buf) + return -ENOMEM; + t->nfit_size = nfit_size; + + t->spa_set[0] = test_alloc_coherent(t, SPA0_SIZE, &t->spa_set_dma[0]); + if (!t->spa_set[0]) + return -ENOMEM; + + t->spa_set[1] = test_alloc_coherent(t, SPA1_SIZE, &t->spa_set_dma[1]); + if (!t->spa_set[1]) + return -ENOMEM; + + for (i = 0; i < NUM_DCR; i++) { + t->dimm[i] = test_alloc(t, DIMM_SIZE, &t->dimm_dma[i]); + if (!t->dimm[i]) + return -ENOMEM; + + t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]); + if (!t->label[i]) + return -ENOMEM; + sprintf(t->label[i], "label%d", i); + } + + for (i = 0; i < NUM_DCR; i++) { + t->dcr[i] = test_alloc(t, LABEL_SIZE, &t->dcr_dma[i]); + if (!t->dcr[i]) + return -ENOMEM; + } + + return 0; +} + +static int nfit_test1_alloc(struct nfit_test *t) +{ + size_t nfit_size = sizeof(struct acpi_table_nfit) + + sizeof(struct acpi_nfit_system_address) + + sizeof(struct acpi_nfit_memory_map) + + sizeof(struct acpi_nfit_control_region); + + t->nfit_buf = test_alloc(t, nfit_size, &t->nfit_dma); + if (!t->nfit_buf) + return -ENOMEM; + t->nfit_size = nfit_size; + + t->spa_set[0] = test_alloc_coherent(t, SPA2_SIZE, &t->spa_set_dma[0]); + if (!t->spa_set[0]) + return -ENOMEM; + + return 0; +} + +static void nfit_test_init_header(struct acpi_table_nfit *nfit, size_t size) +{ + memcpy(nfit->header.signature, ACPI_SIG_NFIT, 4); + nfit->header.length = size; + nfit->header.revision = 1; + memcpy(nfit->header.oem_id, "LIBND", 6); + memcpy(nfit->header.oem_table_id, "TEST", 5); + nfit->header.oem_revision = 1; + memcpy(nfit->header.asl_compiler_id, "TST", 4); + nfit->header.asl_compiler_revision = 1; +} + +static void nfit_test0_setup(struct nfit_test *t) +{ + struct nvdimm_bus_descriptor *nd_desc; + struct acpi_nfit_desc *acpi_desc; + struct acpi_nfit_memory_map *memdev; + void *nfit_buf = t->nfit_buf; + size_t size = t->nfit_size; + struct acpi_nfit_system_address *spa; + struct acpi_nfit_control_region *dcr; + struct acpi_nfit_data_region *bdw; + unsigned int offset; + + nfit_test_init_header(nfit_buf, size); + + /* + * spa0 (interleave first half of dimm0 and dimm1, note storage + * does not actually alias the related block-data-window + * regions) + */ + spa = nfit_buf + sizeof(struct acpi_table_nfit); + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16); + spa->range_index = 0+1; + spa->address = t->spa_set_dma[0]; + spa->length = SPA0_SIZE; + + /* + * spa1 (interleave last half of the 4 DIMMS, note storage + * does not actually alias the related block-data-window + * regions) + */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa); + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16); + spa->range_index = 1+1; + spa->address = t->spa_set_dma[1]; + spa->length = SPA1_SIZE; + + /* spa2 (dcr0) dimm0 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 2; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16); + spa->range_index = 2+1; + spa->address = t->dcr_dma[0]; + spa->length = DCR_SIZE; + + /* spa3 (dcr1) dimm1 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 3; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16); + spa->range_index = 3+1; + spa->address = t->dcr_dma[1]; + spa->length = DCR_SIZE; + + /* spa4 (dcr2) dimm2 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 4; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16); + spa->range_index = 4+1; + spa->address = t->dcr_dma[2]; + spa->length = DCR_SIZE; + + /* spa5 (dcr3) dimm3 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 5; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_DCR), 16); + spa->range_index = 5+1; + spa->address = t->dcr_dma[3]; + spa->length = DCR_SIZE; + + /* spa6 (bdw for dcr0) dimm0 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 6; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16); + spa->range_index = 6+1; + spa->address = t->dimm_dma[0]; + spa->length = DIMM_SIZE; + + /* spa7 (bdw for dcr1) dimm1 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 7; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16); + spa->range_index = 7+1; + spa->address = t->dimm_dma[1]; + spa->length = DIMM_SIZE; + + /* spa8 (bdw for dcr2) dimm2 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 8; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16); + spa->range_index = 8+1; + spa->address = t->dimm_dma[2]; + spa->length = DIMM_SIZE; + + /* spa9 (bdw for dcr3) dimm3 */ + spa = nfit_buf + sizeof(struct acpi_table_nfit) + sizeof(*spa) * 9; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_BDW), 16); + spa->range_index = 9+1; + spa->address = t->dimm_dma[3]; + spa->length = DIMM_SIZE; + + offset = sizeof(struct acpi_table_nfit) + sizeof(*spa) * 10; + /* mem-region0 (spa0, dimm0) */ + memdev = nfit_buf + offset; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[0]; + memdev->physical_id = 0; + memdev->region_id = 0; + memdev->range_index = 0+1; + memdev->region_index = 0+1; + memdev->region_size = SPA0_SIZE/2; + memdev->region_offset = t->spa_set_dma[0]; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 2; + + /* mem-region1 (spa0, dimm1) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map); + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[1]; + memdev->physical_id = 1; + memdev->region_id = 0; + memdev->range_index = 0+1; + memdev->region_index = 1+1; + memdev->region_size = SPA0_SIZE/2; + memdev->region_offset = t->spa_set_dma[0] + SPA0_SIZE/2; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 2; + + /* mem-region2 (spa1, dimm0) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 2; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[0]; + memdev->physical_id = 0; + memdev->region_id = 1; + memdev->range_index = 1+1; + memdev->region_index = 0+1; + memdev->region_size = SPA1_SIZE/4; + memdev->region_offset = t->spa_set_dma[1]; + memdev->address = SPA0_SIZE/2; + memdev->interleave_index = 0; + memdev->interleave_ways = 4; + + /* mem-region3 (spa1, dimm1) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 3; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[1]; + memdev->physical_id = 1; + memdev->region_id = 1; + memdev->range_index = 1+1; + memdev->region_index = 1+1; + memdev->region_size = SPA1_SIZE/4; + memdev->region_offset = t->spa_set_dma[1] + SPA1_SIZE/4; + memdev->address = SPA0_SIZE/2; + memdev->interleave_index = 0; + memdev->interleave_ways = 4; + + /* mem-region4 (spa1, dimm2) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 4; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[2]; + memdev->physical_id = 2; + memdev->region_id = 0; + memdev->range_index = 1+1; + memdev->region_index = 2+1; + memdev->region_size = SPA1_SIZE/4; + memdev->region_offset = t->spa_set_dma[1] + 2*SPA1_SIZE/4; + memdev->address = SPA0_SIZE/2; + memdev->interleave_index = 0; + memdev->interleave_ways = 4; + + /* mem-region5 (spa1, dimm3) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 5; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[3]; + memdev->physical_id = 3; + memdev->region_id = 0; + memdev->range_index = 1+1; + memdev->region_index = 3+1; + memdev->region_size = SPA1_SIZE/4; + memdev->region_offset = t->spa_set_dma[1] + 3*SPA1_SIZE/4; + memdev->address = SPA0_SIZE/2; + memdev->interleave_index = 0; + memdev->interleave_ways = 4; + + /* mem-region6 (spa/dcr0, dimm0) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 6; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[0]; + memdev->physical_id = 0; + memdev->region_id = 0; + memdev->range_index = 2+1; + memdev->region_index = 0+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region7 (spa/dcr1, dimm1) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 7; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[1]; + memdev->physical_id = 1; + memdev->region_id = 0; + memdev->range_index = 3+1; + memdev->region_index = 1+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region8 (spa/dcr2, dimm2) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 8; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[2]; + memdev->physical_id = 2; + memdev->region_id = 0; + memdev->range_index = 4+1; + memdev->region_index = 2+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region9 (spa/dcr3, dimm3) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 9; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[3]; + memdev->physical_id = 3; + memdev->region_id = 0; + memdev->range_index = 5+1; + memdev->region_index = 3+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region10 (spa/bdw0, dimm0) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 10; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[0]; + memdev->physical_id = 0; + memdev->region_id = 0; + memdev->range_index = 6+1; + memdev->region_index = 0+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region11 (spa/bdw1, dimm1) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 11; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[1]; + memdev->physical_id = 1; + memdev->region_id = 0; + memdev->range_index = 7+1; + memdev->region_index = 1+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region12 (spa/bdw2, dimm2) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 12; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[2]; + memdev->physical_id = 2; + memdev->region_id = 0; + memdev->range_index = 8+1; + memdev->region_index = 2+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + /* mem-region13 (spa/dcr3, dimm3) */ + memdev = nfit_buf + offset + sizeof(struct acpi_nfit_memory_map) * 13; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = handle[3]; + memdev->physical_id = 3; + memdev->region_id = 0; + memdev->range_index = 9+1; + memdev->region_index = 3+1; + memdev->region_size = 0; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + offset = offset + sizeof(struct acpi_nfit_memory_map) * 14; + /* dcr-descriptor0 */ + dcr = nfit_buf + offset; + dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION; + dcr->header.length = sizeof(struct acpi_nfit_control_region); + dcr->region_index = 0+1; + dcr->vendor_id = 0xabcd; + dcr->device_id = 0; + dcr->revision_id = 1; + dcr->serial_number = ~handle[0]; + dcr->windows = 1; + dcr->window_size = DCR_SIZE; + dcr->command_offset = 0; + dcr->command_size = 8; + dcr->status_offset = 8; + dcr->status_size = 4; + + /* dcr-descriptor1 */ + dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region); + dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION; + dcr->header.length = sizeof(struct acpi_nfit_control_region); + dcr->region_index = 1+1; + dcr->vendor_id = 0xabcd; + dcr->device_id = 0; + dcr->revision_id = 1; + dcr->serial_number = ~handle[1]; + dcr->windows = 1; + dcr->window_size = DCR_SIZE; + dcr->command_offset = 0; + dcr->command_size = 8; + dcr->status_offset = 8; + dcr->status_size = 4; + + /* dcr-descriptor2 */ + dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 2; + dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION; + dcr->header.length = sizeof(struct acpi_nfit_control_region); + dcr->region_index = 2+1; + dcr->vendor_id = 0xabcd; + dcr->device_id = 0; + dcr->revision_id = 1; + dcr->serial_number = ~handle[2]; + dcr->windows = 1; + dcr->window_size = DCR_SIZE; + dcr->command_offset = 0; + dcr->command_size = 8; + dcr->status_offset = 8; + dcr->status_size = 4; + + /* dcr-descriptor3 */ + dcr = nfit_buf + offset + sizeof(struct acpi_nfit_control_region) * 3; + dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION; + dcr->header.length = sizeof(struct acpi_nfit_control_region); + dcr->region_index = 3+1; + dcr->vendor_id = 0xabcd; + dcr->device_id = 0; + dcr->revision_id = 1; + dcr->serial_number = ~handle[3]; + dcr->windows = 1; + dcr->window_size = DCR_SIZE; + dcr->command_offset = 0; + dcr->command_size = 8; + dcr->status_offset = 8; + dcr->status_size = 4; + + offset = offset + sizeof(struct acpi_nfit_control_region) * 4; + /* bdw0 (spa/dcr0, dimm0) */ + bdw = nfit_buf + offset; + bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION; + bdw->header.length = sizeof(struct acpi_nfit_data_region); + bdw->region_index = 0+1; + bdw->windows = 1; + bdw->offset = 0; + bdw->size = BDW_SIZE; + bdw->capacity = DIMM_SIZE; + bdw->start_address = 0; + + /* bdw1 (spa/dcr1, dimm1) */ + bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region); + bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION; + bdw->header.length = sizeof(struct acpi_nfit_data_region); + bdw->region_index = 1+1; + bdw->windows = 1; + bdw->offset = 0; + bdw->size = BDW_SIZE; + bdw->capacity = DIMM_SIZE; + bdw->start_address = 0; + + /* bdw2 (spa/dcr2, dimm2) */ + bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 2; + bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION; + bdw->header.length = sizeof(struct acpi_nfit_data_region); + bdw->region_index = 2+1; + bdw->windows = 1; + bdw->offset = 0; + bdw->size = BDW_SIZE; + bdw->capacity = DIMM_SIZE; + bdw->start_address = 0; + + /* bdw3 (spa/dcr3, dimm3) */ + bdw = nfit_buf + offset + sizeof(struct acpi_nfit_data_region) * 3; + bdw->header.type = ACPI_NFIT_TYPE_DATA_REGION; + bdw->header.length = sizeof(struct acpi_nfit_data_region); + bdw->region_index = 3+1; + bdw->windows = 1; + bdw->offset = 0; + bdw->size = BDW_SIZE; + bdw->capacity = DIMM_SIZE; + bdw->start_address = 0; + + acpi_desc = &t->acpi_desc; + set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_dsm_force_en); + set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en); + set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en); + nd_desc = &acpi_desc->nd_desc; + nd_desc->ndctl = nfit_test_ctl; +} + +static void nfit_test1_setup(struct nfit_test *t) +{ + size_t size = t->nfit_size, offset; + void *nfit_buf = t->nfit_buf; + struct acpi_nfit_memory_map *memdev; + struct acpi_nfit_control_region *dcr; + struct acpi_nfit_system_address *spa; + + nfit_test_init_header(nfit_buf, size); + + offset = sizeof(struct acpi_table_nfit); + /* spa0 (flat range with no bdw aliasing) */ + spa = nfit_buf + offset; + spa->header.type = ACPI_NFIT_TYPE_SYSTEM_ADDRESS; + spa->header.length = sizeof(*spa); + memcpy(spa->range_guid, to_nfit_uuid(NFIT_SPA_PM), 16); + spa->range_index = 0+1; + spa->address = t->spa_set_dma[0]; + spa->length = SPA2_SIZE; + + offset += sizeof(*spa); + /* mem-region0 (spa0, dimm0) */ + memdev = nfit_buf + offset; + memdev->header.type = ACPI_NFIT_TYPE_MEMORY_MAP; + memdev->header.length = sizeof(*memdev); + memdev->device_handle = 0; + memdev->physical_id = 0; + memdev->region_id = 0; + memdev->range_index = 0+1; + memdev->region_index = 0+1; + memdev->region_size = SPA2_SIZE; + memdev->region_offset = 0; + memdev->address = 0; + memdev->interleave_index = 0; + memdev->interleave_ways = 1; + + offset += sizeof(*memdev); + /* dcr-descriptor0 */ + dcr = nfit_buf + offset; + dcr->header.type = ACPI_NFIT_TYPE_CONTROL_REGION; + dcr->header.length = sizeof(struct acpi_nfit_control_region); + dcr->region_index = 0+1; + dcr->vendor_id = 0xabcd; + dcr->device_id = 0; + dcr->revision_id = 1; + dcr->serial_number = ~0; + dcr->code = 0x201; + dcr->windows = 0; + dcr->window_size = 0; + dcr->command_offset = 0; + dcr->command_size = 0; + dcr->status_offset = 0; + dcr->status_size = 0; +} + +static int nfit_test_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa, + void *iobuf, u64 len, int rw) +{ + struct nfit_blk *nfit_blk = ndbr->blk_provider_data; + struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW]; + struct nd_region *nd_region = &ndbr->nd_region; + unsigned int lane; + + lane = nd_region_acquire_lane(nd_region); + if (rw) + memcpy(mmio->base + dpa, iobuf, len); + else + memcpy(iobuf, mmio->base + dpa, len); + nd_region_release_lane(nd_region, lane); + + return 0; +} + +static int nfit_test_probe(struct platform_device *pdev) +{ + struct nvdimm_bus_descriptor *nd_desc; + struct acpi_nfit_desc *acpi_desc; + struct device *dev = &pdev->dev; + struct nfit_test *nfit_test; + int rc; + + nfit_test = to_nfit_test(&pdev->dev); + + /* common alloc */ + if (nfit_test->num_dcr) { + int num = nfit_test->num_dcr; + + nfit_test->dimm = devm_kcalloc(dev, num, sizeof(void *), + GFP_KERNEL); + nfit_test->dimm_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t), + GFP_KERNEL); + nfit_test->label = devm_kcalloc(dev, num, sizeof(void *), + GFP_KERNEL); + nfit_test->label_dma = devm_kcalloc(dev, num, + sizeof(dma_addr_t), GFP_KERNEL); + nfit_test->dcr = devm_kcalloc(dev, num, + sizeof(struct nfit_test_dcr *), GFP_KERNEL); + nfit_test->dcr_dma = devm_kcalloc(dev, num, + sizeof(dma_addr_t), GFP_KERNEL); + if (nfit_test->dimm && nfit_test->dimm_dma && nfit_test->label + && nfit_test->label_dma && nfit_test->dcr + && nfit_test->dcr_dma) + /* pass */; + else + return -ENOMEM; + } + + if (nfit_test->num_pm) { + int num = nfit_test->num_pm; + + nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *), + GFP_KERNEL); + nfit_test->spa_set_dma = devm_kcalloc(dev, num, + sizeof(dma_addr_t), GFP_KERNEL); + if (nfit_test->spa_set && nfit_test->spa_set_dma) + /* pass */; + else + return -ENOMEM; + } + + /* per-nfit specific alloc */ + if (nfit_test->alloc(nfit_test)) + return -ENOMEM; + + nfit_test->setup(nfit_test); + acpi_desc = &nfit_test->acpi_desc; + acpi_desc->dev = &pdev->dev; + acpi_desc->nfit = nfit_test->nfit_buf; + acpi_desc->blk_do_io = nfit_test_blk_do_io; + nd_desc = &acpi_desc->nd_desc; + nd_desc->attr_groups = acpi_nfit_attribute_groups; + acpi_desc->nvdimm_bus = nvdimm_bus_register(&pdev->dev, nd_desc); + if (!acpi_desc->nvdimm_bus) + return -ENXIO; + + rc = acpi_nfit_init(acpi_desc, nfit_test->nfit_size); + if (rc) { + nvdimm_bus_unregister(acpi_desc->nvdimm_bus); + return rc; + } + + return 0; +} + +static int nfit_test_remove(struct platform_device *pdev) +{ + struct nfit_test *nfit_test = to_nfit_test(&pdev->dev); + struct acpi_nfit_desc *acpi_desc = &nfit_test->acpi_desc; + + nvdimm_bus_unregister(acpi_desc->nvdimm_bus); + + return 0; +} + +static void nfit_test_release(struct device *dev) +{ + struct nfit_test *nfit_test = to_nfit_test(dev); + + kfree(nfit_test); +} + +static const struct platform_device_id nfit_test_id[] = { + { KBUILD_MODNAME }, + { }, +}; + +static struct platform_driver nfit_test_driver = { + .probe = nfit_test_probe, + .remove = nfit_test_remove, + .driver = { + .name = KBUILD_MODNAME, + }, + .id_table = nfit_test_id, +}; + +#ifdef CONFIG_CMA_SIZE_MBYTES +#define CMA_SIZE_MBYTES CONFIG_CMA_SIZE_MBYTES +#else +#define CMA_SIZE_MBYTES 0 +#endif + +static __init int nfit_test_init(void) +{ + int rc, i; + + nfit_test_setup(nfit_test_lookup); + + for (i = 0; i < NUM_NFITS; i++) { + struct nfit_test *nfit_test; + struct platform_device *pdev; + static int once; + + nfit_test = kzalloc(sizeof(*nfit_test), GFP_KERNEL); + if (!nfit_test) { + rc = -ENOMEM; + goto err_register; + } + INIT_LIST_HEAD(&nfit_test->resources); + switch (i) { + case 0: + nfit_test->num_pm = NUM_PM; + nfit_test->num_dcr = NUM_DCR; + nfit_test->alloc = nfit_test0_alloc; + nfit_test->setup = nfit_test0_setup; + break; + case 1: + nfit_test->num_pm = 1; + nfit_test->alloc = nfit_test1_alloc; + nfit_test->setup = nfit_test1_setup; + break; + default: + rc = -EINVAL; + goto err_register; + } + pdev = &nfit_test->pdev; + pdev->name = KBUILD_MODNAME; + pdev->id = i; + pdev->dev.release = nfit_test_release; + rc = platform_device_register(pdev); + if (rc) { + put_device(&pdev->dev); + goto err_register; + } + + rc = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (rc) + goto err_register; + + instances[i] = nfit_test; + + if (!once++) { + dma_addr_t dma; + void *buf; + + buf = dma_alloc_coherent(&pdev->dev, SZ_128M, &dma, + GFP_KERNEL); + if (!buf) { + rc = -ENOMEM; + dev_warn(&pdev->dev, "need 128M of free cma\n"); + goto err_register; + } + dma_free_coherent(&pdev->dev, SZ_128M, buf, dma); + } + } + + rc = platform_driver_register(&nfit_test_driver); + if (rc) + goto err_register; + return 0; + + err_register: + for (i = 0; i < NUM_NFITS; i++) + if (instances[i]) + platform_device_unregister(&instances[i]->pdev); + nfit_test_teardown(); + return rc; +} + +static __exit void nfit_test_exit(void) +{ + int i; + + platform_driver_unregister(&nfit_test_driver); + for (i = 0; i < NUM_NFITS; i++) + platform_device_unregister(&instances[i]->pdev); + nfit_test_teardown(); +} + +module_init(nfit_test_init); +module_exit(nfit_test_exit); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Intel Corporation"); diff --git a/tools/testing/nvdimm/test/nfit_test.h b/tools/testing/nvdimm/test/nfit_test.h new file mode 100644 index 000000000000..96c5e16d7db9 --- /dev/null +++ b/tools/testing/nvdimm/test/nfit_test.h @@ -0,0 +1,29 @@ +/* + * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#ifndef __NFIT_TEST_H__ +#define __NFIT_TEST_H__ + +struct nfit_test_resource { + struct list_head list; + struct resource *res; + struct device *dev; + void *buf; +}; + +typedef struct nfit_test_resource *(*nfit_test_lookup_fn)(resource_size_t); +void __iomem *__wrap_ioremap_nocache(resource_size_t offset, + unsigned long size); +void __wrap_iounmap(volatile void __iomem *addr); +void nfit_test_setup(nfit_test_lookup_fn lookup); +void nfit_test_teardown(void); +#endif -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
