diff options
Diffstat (limited to 'drivers/nvdimm/region_devs.c')
-rw-r--r-- | drivers/nvdimm/region_devs.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index d976260eca7a..e0875d369762 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -133,7 +133,8 @@ static void nd_region_release(struct device *dev) put_device(&nvdimm->dev); } free_percpu(nd_region->lane); - memregion_free(nd_region->id); + if (!test_bit(ND_REGION_CXL, &nd_region->flags)) + memregion_free(nd_region->id); kfree(nd_region); } @@ -508,16 +509,13 @@ static ssize_t align_store(struct device *dev, { struct nd_region *nd_region = to_nd_region(dev); unsigned long val, dpa; - u32 remainder; + u32 mappings, remainder; int rc; rc = kstrtoul(buf, 0, &val); if (rc) return rc; - if (!nd_region->ndr_mappings) - return -ENXIO; - /* * Ensure space-align is evenly divisible by the region * interleave-width because the kernel typically has no facility @@ -525,7 +523,8 @@ static ssize_t align_store(struct device *dev, * contribute to the tail capacity in system-physical-address * space for the namespace. */ - dpa = div_u64_rem(val, nd_region->ndr_mappings, &remainder); + mappings = max_t(u32, 1, nd_region->ndr_mappings); + dpa = div_u64_rem(val, mappings, &remainder); if (!is_power_of_2(dpa) || dpa < PAGE_SIZE || val > region_size(nd_region) || remainder) return -EINVAL; @@ -982,9 +981,14 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, if (!nd_region) return NULL; - nd_region->id = memregion_alloc(GFP_KERNEL); - if (nd_region->id < 0) - goto err_id; + /* CXL pre-assigns memregion ids before creating nvdimm regions */ + if (test_bit(ND_REGION_CXL, &ndr_desc->flags)) { + nd_region->id = ndr_desc->memregion; + } else { + nd_region->id = memregion_alloc(GFP_KERNEL); + if (nd_region->id < 0) + goto err_id; + } nd_region->lane = alloc_percpu(struct nd_percpu_lane); if (!nd_region->lane) @@ -1043,9 +1047,10 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, return nd_region; - err_percpu: - memregion_free(nd_region->id); - err_id: +err_percpu: + if (!test_bit(ND_REGION_CXL, &ndr_desc->flags)) + memregion_free(nd_region->id); +err_id: kfree(nd_region); return NULL; } @@ -1068,6 +1073,13 @@ struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus, } EXPORT_SYMBOL_GPL(nvdimm_volatile_region_create); +void nvdimm_region_delete(struct nd_region *nd_region) +{ + if (nd_region) + nd_device_unregister(&nd_region->dev, ND_SYNC); +} +EXPORT_SYMBOL_GPL(nvdimm_region_delete); + int nvdimm_flush(struct nd_region *nd_region, struct bio *bio) { int rc = 0; @@ -1082,7 +1094,7 @@ int nvdimm_flush(struct nd_region *nd_region, struct bio *bio) return rc; } /** - * nvdimm_flush - flush any posted write queues between the cpu and pmem media + * generic_nvdimm_flush() - flush any posted write queues between the cpu and pmem media * @nd_region: interleaved pmem region */ int generic_nvdimm_flush(struct nd_region *nd_region) |