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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-10 11:07:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-10 11:07:26 -0700
commitc235698355fa94df7073b51befda7d4be00a0e23 (patch)
tree3cb9d2fa40862f2484eda9c148b4326505a8534d /drivers/nvdimm
parent5e2e7383b57fa03ec2b00c82bb7f49a4a707c1f7 (diff)
parent1cd8a2537eb07751d405ab7e2223f20338a90506 (diff)
Merge tag 'cxl-for-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull cxl updates from Dan Williams: "Compute Express Link (CXL) updates for 6.0: - Introduce a 'struct cxl_region' object with support for provisioning and assembling persistent memory regions. - Introduce alloc_free_mem_region() to accompany the existing request_free_mem_region() as a method to allocate physical memory capacity out of an existing resource. - Export insert_resource_expand_to_fit() for the CXL subsystem to late-publish CXL platform windows in iomem_resource. - Add a polled mode PCI DOE (Data Object Exchange) driver service and use it in cxl_pci to retrieve the CDAT (Coherent Device Attribute Table)" * tag 'cxl-for-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (74 commits) cxl/hdm: Fix skip allocations vs multiple pmem allocations cxl/region: Disallow region granularity != window granularity cxl/region: Fix x1 interleave to greater than x1 interleave routing cxl/region: Move HPA setup to cxl_region_attach() cxl/region: Fix decoder interleave programming Documentation: cxl: remove dangling kernel-doc reference cxl/region: describe targets and nr_targets members of cxl_region_params cxl/regions: add padding for cxl_rr_ep_add nested lists cxl/region: Fix IS_ERR() vs NULL check cxl/region: Fix region reference target accounting cxl/region: Fix region commit uninitialized variable warning cxl/region: Fix port setup uninitialized variable warnings cxl/region: Stop initializing interleave granularity cxl/hdm: Fix DPA reservation vs cxl_endpoint_decoder lifetime cxl/acpi: Minimize granularity for x1 interleaves cxl/region: Delete 'region' attribute from root decoders cxl/acpi: Autoload driver for 'cxl_acpi' test devices cxl/region: decrement ->nr_targets on error in cxl_region_attach() cxl/region: prevent underflow in ways_to_cxl() cxl/region: uninitialized variable in alloc_hpa() ...
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/region_devs.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index d976260eca7a..473a71bbd9c9 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);
}
@@ -982,9 +983,14 @@ 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 +1049,10 @@ 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 +1075,13 @@ 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;