static DEFINE_IDA(dimm_ida);
-static bool noblk;
-module_param(noblk, bool, 0444);
-MODULE_PARM_DESC(noblk, "force disable BLK / local alias support");
-
/*
* Retrieve bus and dimm handle and return if this bus supports
* get_config_data commands
}
EXPORT_SYMBOL_GPL(to_nvdimm);
-struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr)
-{
- struct nd_region *nd_region = &ndbr->nd_region;
- struct nd_mapping *nd_mapping = &nd_region->mapping[0];
-
- return nd_mapping->nvdimm;
-}
-EXPORT_SYMBOL_GPL(nd_blk_region_to_dimm);
-
-unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr)
-{
- /* pmem mapping properties are private to libnvdimm */
- return ARCH_MEMREMAP_PMEM;
-}
-EXPORT_SYMBOL_GPL(nd_blk_memremap_flags);
-
struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping)
{
struct nvdimm *nvdimm = nd_mapping->nvdimm;
{
struct nvdimm *nvdimm = to_nvdimm(dev);
- return sprintf(buf, "%s%s%s\n",
- test_bit(NDD_ALIASING, &nvdimm->flags) ? "alias " : "",
+ return sprintf(buf, "%s%s\n",
test_bit(NDD_LABELING, &nvdimm->flags) ? "label " : "",
test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : "");
}
nvdimm->dimm_id = dimm_id;
nvdimm->provider_data = provider_data;
- if (noblk)
- flags |= 1 << NDD_NOBLK;
nvdimm->flags = flags;
nvdimm->cmd_mask = cmd_mask;
nvdimm->num_flush = num_flush;
return nd_region->align / nd_region->ndr_mappings;
}
-int alias_dpa_busy(struct device *dev, void *data)
-{
- resource_size_t map_end, blk_start, new;
- struct blk_alloc_info *info = data;
- struct nd_mapping *nd_mapping;
- struct nd_region *nd_region;
- struct nvdimm_drvdata *ndd;
- struct resource *res;
- unsigned long align;
- int i;
-
- if (!is_memory(dev))
- return 0;
-
- nd_region = to_nd_region(dev);
- for (i = 0; i < nd_region->ndr_mappings; i++) {
- nd_mapping = &nd_region->mapping[i];
- if (nd_mapping->nvdimm == info->nd_mapping->nvdimm)
- break;
- }
-
- if (i >= nd_region->ndr_mappings)
- return 0;
-
- ndd = to_ndd(nd_mapping);
- map_end = nd_mapping->start + nd_mapping->size - 1;
- blk_start = nd_mapping->start;
-
- /*
- * In the allocation case ->res is set to free space that we are
- * looking to validate against PMEM aliasing collision rules
- * (i.e. BLK is allocated after all aliased PMEM).
- */
- if (info->res) {
- if (info->res->start >= nd_mapping->start
- && info->res->start < map_end)
- /* pass */;
- else
- return 0;
- }
-
- retry:
- /*
- * Find the free dpa from the end of the last pmem allocation to
- * the end of the interleave-set mapping.
- */
- align = dpa_align(nd_region);
- if (!align)
- return 0;
-
- for_each_dpa_resource(ndd, res) {
- resource_size_t start, end;
-
- if (strncmp(res->name, "pmem", 4) != 0)
- continue;
-
- start = ALIGN_DOWN(res->start, align);
- end = ALIGN(res->end + 1, align) - 1;
- if ((start >= blk_start && start < map_end)
- || (end >= blk_start && end <= map_end)) {
- new = max(blk_start, min(map_end, end) + 1);
- if (new != blk_start) {
- blk_start = new;
- goto retry;
- }
- }
- }
-
- /* update the free space range with the probed blk_start */
- if (info->res && blk_start > info->res->start) {
- info->res->start = max(info->res->start, blk_start);
- if (info->res->start > info->res->end)
- info->res->end = info->res->start - 1;
- return 1;
- }
-
- info->available -= blk_start - nd_mapping->start;
-
- return 0;
-}
-
-/**
- * nd_blk_available_dpa - account the unused dpa of BLK region
- * @nd_mapping: container of dpa-resource-root + labels
- *
- * Unlike PMEM, BLK namespaces can occupy discontiguous DPA ranges, but
- * we arrange for them to never start at an lower dpa than the last
- * PMEM allocation in an aliased region.
- */
-resource_size_t nd_blk_available_dpa(struct nd_region *nd_region)
-{
- struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev);
- struct nd_mapping *nd_mapping = &nd_region->mapping[0];
- struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
- struct blk_alloc_info info = {
- .nd_mapping = nd_mapping,
- .available = nd_mapping->size,
- .res = NULL,
- };
- struct resource *res;
- unsigned long align;
-
- if (!ndd)
- return 0;
-
- device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy);
-
- /* now account for busy blk allocations in unaliased dpa */
- align = dpa_align(nd_region);
- if (!align)
- return 0;
- for_each_dpa_resource(ndd, res) {
- resource_size_t start, end, size;
-
- if (strncmp(res->name, "blk", 3) != 0)
- continue;
- start = ALIGN_DOWN(res->start, align);
- end = ALIGN(res->end + 1, align) - 1;
- size = end - start + 1;
- if (size >= info.available)
- return 0;
- info.available -= size;
- }
-
- return info.available;
-}
-
/**
* nd_pmem_max_contiguous_dpa - For the given dimm+region, return the max
* contiguous unallocated dpa range.
* nd_pmem_available_dpa - for the given dimm+region account unallocated dpa
* @nd_mapping: container of dpa-resource-root + labels
* @nd_region: constrain available space check to this reference region
- * @overlap: calculate available space assuming this level of overlap
*
* Validate that a PMEM label, if present, aligns with the start of an
- * interleave set and truncate the available size at the lowest BLK
- * overlap point.
- *
- * The expectation is that this routine is called multiple times as it
- * probes for the largest BLK encroachment for any single member DIMM of
- * the interleave set. Once that value is determined the PMEM-limit for
- * the set can be established.
+ * interleave set.
*/
resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
- struct nd_mapping *nd_mapping, resource_size_t *overlap)
+ struct nd_mapping *nd_mapping)
{
- resource_size_t map_start, map_end, busy = 0, available, blk_start;
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+ resource_size_t map_start, map_end, busy = 0;
struct resource *res;
- const char *reason;
unsigned long align;
if (!ndd)
map_start = nd_mapping->start;
map_end = map_start + nd_mapping->size - 1;
- blk_start = max(map_start, map_end + 1 - *overlap);
for_each_dpa_resource(ndd, res) {
resource_size_t start, end;
start = ALIGN_DOWN(res->start, align);
end = ALIGN(res->end + 1, align) - 1;
if (start >= map_start && start < map_end) {
- if (strncmp(res->name, "blk", 3) == 0)
- blk_start = min(blk_start,
- max(map_start, start));
- else if (end > map_end) {
- reason = "misaligned to iset";
- goto err;
- } else
- busy += end - start + 1;
+ if (end > map_end) {
+ nd_dbg_dpa(nd_region, ndd, res,
+ "misaligned to iset\n");
+ return 0;
+ }
+ busy += end - start + 1;
} else if (end >= map_start && end <= map_end) {
- if (strncmp(res->name, "blk", 3) == 0) {
- /*
- * If a BLK allocation overlaps the start of
- * PMEM the entire interleave set may now only
- * be used for BLK.
- */
- blk_start = map_start;
- } else
- busy += end - start + 1;
+ busy += end - start + 1;
} else if (map_start > start && map_start < end) {
/* total eclipse of the mapping */
busy += nd_mapping->size;
- blk_start = map_start;
}
}
- *overlap = map_end + 1 - blk_start;
- available = blk_start - map_start;
- if (busy < available)
- return ALIGN_DOWN(available - busy, align);
- return 0;
-
- err:
- nd_dbg_dpa(nd_region, ndd, res, "%s\n", reason);
+ if (busy < nd_mapping->size)
+ return ALIGN_DOWN(nd_mapping->size - busy, align);
return 0;
}
/**
* nvdimm_allocated_dpa - sum up the dpa currently allocated to this label_id
* @nvdimm: container of dpa-resource-root + labels
- * @label_id: dpa resource name of the form {pmem|blk}-<human readable uuid>
+ * @label_id: dpa resource name of the form pmem-<human readable uuid>
*/
resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
struct nd_label_id *label_id)
projects / linux-2.6-microblaze.git / blobdiff