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author | Dan Williams <dan.j.williams@intel.com> | 2015-05-30 12:36:02 -0400 |
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committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-24 21:24:10 -0400 |
commit | f524bf271a5cf12a44253194abcf8b6688ff5b9d (patch) | |
tree | e477ae652183e73a6a3c6fc592046e255d2bfd15 /drivers/nvdimm/dimm_devs.c | |
parent | 1b40e09a1232de537b193fa1b6b3ef16d3a1e397 (diff) | |
download | linux-f524bf271a5cf12a44253194abcf8b6688ff5b9d.tar.bz2 |
libnvdimm: write pmem label set
After 'uuid', 'size', and optionally 'alt_name' have been set to valid
values the labels on the dimms can be updated.
Write procedure is:
1/ Allocate and write new labels in the "next" index
2/ Free the old labels in the working copy
3/ Write the bitmap and the label space on the dimm
4/ Write the index to make the update valid
Label ranges directly mirror the dpa resource values for the given
label_id of the namespace.
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Neil Brown <neilb@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/dimm_devs.c')
-rw-r--r-- | drivers/nvdimm/dimm_devs.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 101d3b76e405..156d518a089c 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -132,6 +132,55 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd) return rc; } +int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset, + void *buf, size_t len) +{ + int rc = validate_dimm(ndd); + size_t max_cmd_size, buf_offset; + struct nd_cmd_set_config_hdr *cmd; + struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev); + struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc; + + if (rc) + return rc; + + if (!ndd->data) + return -ENXIO; + + if (offset + len > ndd->nsarea.config_size) + return -ENXIO; + + max_cmd_size = min_t(u32, PAGE_SIZE, len); + max_cmd_size = min_t(u32, max_cmd_size, ndd->nsarea.max_xfer); + cmd = kzalloc(max_cmd_size + sizeof(*cmd) + sizeof(u32), GFP_KERNEL); + if (!cmd) + return -ENOMEM; + + for (buf_offset = 0; len; len -= cmd->in_length, + buf_offset += cmd->in_length) { + size_t cmd_size; + u32 *status; + + cmd->in_offset = offset + buf_offset; + cmd->in_length = min(max_cmd_size, len); + memcpy(cmd->in_buf, buf + buf_offset, cmd->in_length); + + /* status is output in the last 4-bytes of the command buffer */ + cmd_size = sizeof(*cmd) + cmd->in_length + sizeof(u32); + status = ((void *) cmd) + cmd_size - sizeof(u32); + + rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev), + ND_CMD_SET_CONFIG_DATA, cmd, cmd_size); + if (rc || *status) { + rc = rc ? rc : -ENXIO; + break; + } + } + kfree(cmd); + + return rc; +} + static void nvdimm_release(struct device *dev) { struct nvdimm *nvdimm = to_nvdimm(dev); |