nfit, libnvdimm: clarify "commands" vs "_DSMs"
Clarify the distinction between "commands", the ioctls userspace calls
to request the kernel take some action on a given dimm device, and
"_DSMs", the actual function numbers used in the firmware interface to
the DIMM. _DSMs are ACPI specific whereas commands are Linux kernel
generic.
This is in preparation for breaking the 1:1 implicit relationship
between the kernel ioctl number space and the firmware specific function
numbers.
Cc: Jerry Hoemann <jerry.hoemann@hpe.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 19f822d..cb2042a 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -589,24 +589,24 @@
void __user *p = (void __user *) arg;
struct device *dev = &nvdimm_bus->dev;
const char *cmd_name, *dimm_name;
- unsigned long dsm_mask;
+ unsigned long cmd_mask;
void *buf;
int rc, i;
if (nvdimm) {
desc = nd_cmd_dimm_desc(cmd);
cmd_name = nvdimm_cmd_name(cmd);
- dsm_mask = nvdimm->dsm_mask ? *(nvdimm->dsm_mask) : 0;
+ cmd_mask = nvdimm->cmd_mask;
dimm_name = dev_name(&nvdimm->dev);
} else {
desc = nd_cmd_bus_desc(cmd);
cmd_name = nvdimm_bus_cmd_name(cmd);
- dsm_mask = nd_desc->dsm_mask;
+ cmd_mask = nd_desc->cmd_mask;
dimm_name = "bus";
}
if (!desc || (desc->out_num + desc->in_num == 0) ||
- !test_bit(cmd, &dsm_mask))
+ !test_bit(cmd, &cmd_mask))
return -ENOTTY;
/* fail write commands (when read-only) */
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index 182a93f..e8688a1 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -251,7 +251,7 @@
struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
- for_each_set_bit(cmd, &nd_desc->dsm_mask, BITS_PER_LONG)
+ for_each_set_bit(cmd, &nd_desc->cmd_mask, BITS_PER_LONG)
len += sprintf(buf + len, "%s ", nvdimm_bus_cmd_name(cmd));
len += sprintf(buf + len, "\n");
return len;
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index c56f882..79a35a0 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -37,9 +37,9 @@
nvdimm = to_nvdimm(ndd->dev);
- if (!nvdimm->dsm_mask)
+ if (!nvdimm->cmd_mask)
return -ENXIO;
- if (!test_bit(ND_CMD_GET_CONFIG_DATA, nvdimm->dsm_mask))
+ if (!test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask))
return -ENXIO;
return 0;
@@ -263,6 +263,12 @@
}
EXPORT_SYMBOL_GPL(nvdimm_name);
+unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm)
+{
+ return nvdimm->cmd_mask;
+}
+EXPORT_SYMBOL_GPL(nvdimm_cmd_mask);
+
void *nvdimm_provider_data(struct nvdimm *nvdimm)
{
if (nvdimm)
@@ -277,10 +283,10 @@
struct nvdimm *nvdimm = to_nvdimm(dev);
int cmd, len = 0;
- if (!nvdimm->dsm_mask)
+ if (!nvdimm->cmd_mask)
return sprintf(buf, "\n");
- for_each_set_bit(cmd, nvdimm->dsm_mask, BITS_PER_LONG)
+ for_each_set_bit(cmd, &nvdimm->cmd_mask, BITS_PER_LONG)
len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd));
len += sprintf(buf + len, "\n");
return len;
@@ -340,7 +346,7 @@
struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
const struct attribute_group **groups, unsigned long flags,
- unsigned long *dsm_mask)
+ unsigned long cmd_mask)
{
struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL);
struct device *dev;
@@ -355,7 +361,7 @@
}
nvdimm->provider_data = provider_data;
nvdimm->flags = flags;
- nvdimm->dsm_mask = dsm_mask;
+ nvdimm->cmd_mask = cmd_mask;
atomic_set(&nvdimm->busy, 0);
dev = &nvdimm->dev;
dev_set_name(dev, "nmem%d", nvdimm->id);
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index 1d1500f..da0d322 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -37,7 +37,7 @@
struct nvdimm {
unsigned long flags;
void *provider_data;
- unsigned long *dsm_mask;
+ unsigned long cmd_mask;
struct device dev;
atomic_t busy;
int id;