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authorDan Williams <dan.j.williams@intel.com>2021-08-24 19:05:57 +0300
committerDan Williams <dan.j.williams@intel.com>2021-08-24 22:08:28 +0300
commitde8fa48b9a281e69f944c58ae2adbd8a277787a6 (patch)
treed17c40b33b178fa9bdc626abd595d6eae44b9446 /drivers/nvdimm
parentf56541a7122c68ef3074e41c2cb14182eb11d3a5 (diff)
downloadlinux-de8fa48b9a281e69f944c58ae2adbd8a277787a6.tar.xz
libnvdimm/labels: Add blk special cases for nlabel and position helpers
In preparation for LIBNVDIMM to manage labels on CXL devices deploy helpers that abstract the label type from the implementation. The CXL label format is mostly similar to the EFI label format with concepts / fields added, like dynamic region creation and label type guids, and other concepts removed like BLK-mode and interleave-set-cookie ids. Finish off the BLK-mode specific helper conversion with the nlabel and position behaviour that is specific to EFI v1.2 labels and not the original v1.1 definition. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/162982115698.1124374.10182273478536799613.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/label.c46
1 files changed, 29 insertions, 17 deletions
diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index d1a7f399cfe4..7188675c0955 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -898,6 +898,10 @@ static struct resource *to_resource(struct nvdimm_drvdata *ndd,
return NULL;
}
+/*
+ * Use the presence of the type_guid as a flag to determine isetcookie
+ * usage and nlabel + position policy for blk-aperture namespaces.
+ */
static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd,
struct nd_namespace_label *nd_label,
u64 isetcookie)
@@ -925,6 +929,28 @@ bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd,
return true;
}
+static void nsl_set_blk_nlabel(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label, int nlabel,
+ bool first)
+{
+ if (!namespace_label_has(ndd, type_guid)) {
+ nsl_set_nlabel(ndd, nd_label, 0); /* N/A */
+ return;
+ }
+ nsl_set_nlabel(ndd, nd_label, first ? nlabel : 0xffff);
+}
+
+static void nsl_set_blk_position(struct nvdimm_drvdata *ndd,
+ struct nd_namespace_label *nd_label,
+ bool first)
+{
+ if (!namespace_label_has(ndd, type_guid)) {
+ nsl_set_position(ndd, nd_label, 0);
+ return;
+ }
+ nsl_set_position(ndd, nd_label, first ? 0 : 0xffff);
+}
+
/*
* 1/ Account all the labels that can be freed after this update
* 2/ Allocate and write the label to the staging (next) index
@@ -1056,23 +1082,9 @@ static int __blk_label_update(struct nd_region *nd_region,
nsl_set_name(ndd, nd_label, nsblk->alt_name);
nsl_set_flags(ndd, nd_label, NSLABEL_FLAG_LOCAL);
- /*
- * Use the presence of the type_guid as a flag to
- * determine isetcookie usage and nlabel + position
- * policy for blk-aperture namespaces.
- */
- if (namespace_label_has(ndd, type_guid)) {
- if (i == min_dpa_idx) {
- nsl_set_nlabel(ndd, nd_label, nsblk->num_resources);
- nsl_set_position(ndd, nd_label, 0);
- } else {
- nsl_set_nlabel(ndd, nd_label, 0xffff);
- nsl_set_position(ndd, nd_label, 0xffff);
- }
- } else {
- nsl_set_nlabel(ndd, nd_label, 0); /* N/A */
- nsl_set_position(ndd, nd_label, 0); /* N/A */
- }
+ nsl_set_blk_nlabel(ndd, nd_label, nsblk->num_resources,
+ i == min_dpa_idx);
+ nsl_set_blk_position(ndd, nd_label, i == min_dpa_idx);
nsl_set_blk_isetcookie(ndd, nd_label, nd_set->cookie2);
nsl_set_dpa(ndd, nd_label, res->start);