libnvdimm, acpi, nfit: Add bus level dsm mask for pass thru.

Add a bus level dsm_mask to nvdimm_bus_descriptor to allow the passthru
calling mechanism to specify a different mask from the cmd_mask.

Populate bus_dsm_mask and use it to filter dsm calls that user can
make through the pass thru interface.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
[djbw: use command number constants instead of a magic mask value]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index b16e4ef..b7d7cc4 100644 (file)
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -253,6 +253,8 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
                cmd_name = nvdimm_bus_cmd_name(cmd);
                cmd_mask = nd_desc->cmd_mask;
                dsm_mask = cmd_mask;
+               if (cmd == ND_CMD_CALL)
+                       dsm_mask = nd_desc->bus_dsm_mask;
                desc = nd_cmd_bus_desc(cmd);
                guid = to_nfit_uuid(NFIT_DEV_BUS);
                handle = adev->handle;
@@ -1608,11 +1610,23 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
                        acpi_desc);
 }
 
+/*
+ * These constants are private because there are no kernel consumers of
+ * these commands.
+ */
+enum nfit_aux_cmds {
+        NFIT_CMD_TRANSLATE_SPA = 5,
+        NFIT_CMD_ARS_INJECT_SET = 7,
+        NFIT_CMD_ARS_INJECT_CLEAR = 8,
+        NFIT_CMD_ARS_INJECT_GET = 9,
+};
+
 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
 {
        struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
        const guid_t *guid = to_nfit_uuid(NFIT_DEV_BUS);
        struct acpi_device *adev;
+       unsigned long dsm_mask;
        int i;
 
        nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
@@ -1624,6 +1638,19 @@ static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
                if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
                        set_bit(i, &nd_desc->cmd_mask);
        set_bit(ND_CMD_CALL, &nd_desc->cmd_mask);
+
+       dsm_mask =
+               (1 << ND_CMD_ARS_CAP) |
+               (1 << ND_CMD_ARS_START) |
+               (1 << ND_CMD_ARS_STATUS) |
+               (1 << ND_CMD_CLEAR_ERROR) |
+               (1 << NFIT_CMD_TRANSLATE_SPA) |
+               (1 << NFIT_CMD_ARS_INJECT_SET) |
+               (1 << NFIT_CMD_ARS_INJECT_CLEAR) |
+               (1 << NFIT_CMD_ARS_INJECT_GET);
+       for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
+               if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
+                       set_bit(i, &nd_desc->bus_dsm_mask);
 }
 
 static ssize_t range_index_show(struct device *dev,

diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index 4b9f178..6aee1a6 100644 (file)
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -55,6 +55,7 @@ typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
 
 struct nvdimm_bus_descriptor {
        const struct attribute_group **attr_groups;
+       unsigned long bus_dsm_mask;
        unsigned long cmd_mask;
        struct module *module;
        char *provider_name;