[RFC/Patch 3/5] nfit_test supports Translate SPA

[Yasunori Goto <y-goto@jp.fujitsu.com>]

nfit_test supports Translate SPA

To test interface of Translate SPA, nfit_test must emulate it.
This test module searches region which includes spa and 
returns only 1 dimm handle which is last one currently.



Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>

---
 drivers/nvdimm/region_devs.c     |  1 +
 tools/testing/nvdimm/test/nfit.c | 80 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 80 insertions(+), 1 deletion(-)

diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 5954cfb..3c8cc7f 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -162,6 +162,7 @@ bool is_nd_pmem(struct device *dev)
 {
 	return dev ? dev->type == &nd_pmem_device_type : false;
 }
+EXPORT_SYMBOL_GPL(is_nd_pmem);
 
 bool is_nd_blk(struct device *dev)
 {
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index 4c2fa98..09dcdf5 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -342,6 +342,78 @@ static int nfit_test_cmd_clear_error(struct nd_cmd_clear_error *clear_err,
 	return 0;
 }
 
+struct region_search_spa{
+	u64 addr;
+	struct nd_region *region;
+};
+
+static int nfit_test_search_region_spa(struct device *dev, void *data)
+{
+	struct region_search_spa *ctx = data;
+	struct nd_region *nd_region;
+	resource_size_t ndr_end;
+
+	if (!is_nd_pmem(dev))
+		return 0;
+
+	nd_region = to_nd_region(dev);
+	ndr_end = nd_region->ndr_start + nd_region->ndr_size;
+
+	if (ctx->addr >= nd_region->ndr_start && ctx->addr < ndr_end) {
+		ctx->region = nd_region;
+		return 1;
+	}
+
+	return 0;
+}
+
+static int nfit_test_search_spa(struct nvdimm_bus *bus, struct nd_cmd_trans_spa *spa)
+{
+	int ret;
+	struct nd_region *nd_region = NULL;
+	struct nvdimm *nvdimm = NULL;
+	struct nd_mapping *nd_mapping = NULL;
+	struct region_search_spa ctx = {
+		.addr = spa->spa,
+		.region = NULL,
+	};
+	u64 dpa;
+
+	ret = device_for_each_child(&bus->dev, &ctx, nfit_test_search_region_spa);
+
+	if (!ret)
+		return -ENODEV;
+
+	nd_region = ctx.region;
+
+	dpa = ctx.addr - nd_region->ndr_start;
+
+	/*
+	 * last dimm is selected for test
+	 */
+	nd_mapping = &nd_region->mapping[nd_region->ndr_mappings - 1];
+	nvdimm = nd_mapping->nvdimm;
+
+	spa->devices[0].nfit_device_handle = handle[nvdimm->id];
+	spa->num_nvdimms = 1;
+	spa->devices[0].dpa = dpa;
+
+	return 0;
+}
+
+static int nfit_test_cmd_translate_spa(struct nvdimm_bus *bus, struct nd_cmd_trans_spa *spa,
+				unsigned int buf_len)
+{
+
+	if (buf_len < spa->trans_length)
+		return -EINVAL;
+
+	if (nfit_test_search_spa(bus, spa) < 0|| !spa->num_nvdimms)
+		spa->status = 2;
+
+	return 0;
+}
+
 static int nfit_test_cmd_smart(struct nd_cmd_smart *smart, unsigned int buf_len)
 {
 	static const struct nd_smart_payload smart_data = {
@@ -468,6 +540,9 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 		case ND_CMD_CLEAR_ERROR:
 			rc = nfit_test_cmd_clear_error(buf, buf_len, cmd_rc);
 			break;
+		case ND_CMD_TRANS_SPA:
+			rc = nfit_test_cmd_translate_spa(acpi_desc->nvdimm_bus, buf, buf_len);
+			break;
 		default:
 			return -ENOTTY;
 		}
@@ -1430,6 +1505,7 @@ static void nfit_test0_setup(struct nfit_test *t)
 	set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
+	set_bit(ND_CMD_TRANS_SPA, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_SMART_THRESHOLD, &acpi_desc->dimm_cmd_force_en);
 }
 
@@ -1527,6 +1603,7 @@ static void nfit_test1_setup(struct nfit_test *t)
 	set_bit(ND_CMD_ARS_START, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_ARS_STATUS, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_CLEAR_ERROR, &acpi_desc->bus_cmd_force_en);
+	set_bit(ND_CMD_TRANS_SPA, &acpi_desc->bus_cmd_force_en);
 	set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_cmd_force_en);
 	set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
 	set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_cmd_force_en);
@@ -1616,7 +1693,8 @@ static int nfit_ctl_test(struct device *dev)
 			.cmd_mask = 1UL << ND_CMD_ARS_CAP
 				| 1UL << ND_CMD_ARS_START
 				| 1UL << ND_CMD_ARS_STATUS
-				| 1UL << ND_CMD_CLEAR_ERROR,
+				| 1UL << ND_CMD_CLEAR_ERROR
+			        | 1UL << ND_CMD_TRANS_SPA,
 			.module = THIS_MODULE,
 			.provider_name = "ACPI.NFIT",
 			.ndctl = acpi_nfit_ctl,



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