diff options
Diffstat (limited to 'drivers/nvdimm/region_devs.c')
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 91 |
1 files changed, 80 insertions, 11 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index fe8ec21fe3d7..2cfb3f74bcbf 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -11,6 +11,7 @@ * General Public License for more details. */ #include <linux/scatterlist.h> +#include <linux/highmem.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/sort.h> @@ -34,7 +35,10 @@ static void nd_region_release(struct device *dev) } free_percpu(nd_region->lane); ida_simple_remove(®ion_ida, nd_region->id); - kfree(nd_region); + if (is_nd_blk(dev)) + kfree(to_nd_blk_region(dev)); + else + kfree(nd_region); } static struct device_type nd_blk_device_type = { @@ -71,6 +75,33 @@ struct nd_region *to_nd_region(struct device *dev) } EXPORT_SYMBOL_GPL(to_nd_region); +struct nd_blk_region *to_nd_blk_region(struct device *dev) +{ + struct nd_region *nd_region = to_nd_region(dev); + + WARN_ON(!is_nd_blk(dev)); + return container_of(nd_region, struct nd_blk_region, nd_region); +} +EXPORT_SYMBOL_GPL(to_nd_blk_region); + +void *nd_region_provider_data(struct nd_region *nd_region) +{ + return nd_region->provider_data; +} +EXPORT_SYMBOL_GPL(nd_region_provider_data); + +void *nd_blk_region_provider_data(struct nd_blk_region *ndbr) +{ + return ndbr->blk_provider_data; +} +EXPORT_SYMBOL_GPL(nd_blk_region_provider_data); + +void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data) +{ + ndbr->blk_provider_data = data; +} +EXPORT_SYMBOL_GPL(nd_blk_region_set_provider_data); + /** * nd_region_to_nstype() - region to an integer namespace type * @nd_region: region-device to interrogate @@ -365,7 +396,8 @@ u64 nd_region_interleave_set_cookie(struct nd_region *nd_region) /* * Upon successful probe/remove, take/release a reference on the * associated interleave set (if present), and plant new btt + namespace - * seeds. + * seeds. Also, on the removal of a BLK region, notify the provider to + * disable the region. */ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus, struct device *dev, bool probe) @@ -385,8 +417,14 @@ static void nd_region_notify_driver_action(struct nvdimm_bus *nvdimm_bus, nd_mapping->labels = NULL; put_ndd(ndd); nd_mapping->ndd = NULL; - atomic_dec(&nvdimm->busy); + if (ndd) + atomic_dec(&nvdimm->busy); } + + if (is_nd_pmem(dev)) + return; + + to_nd_blk_region(dev)->disable(nvdimm_bus, dev); } if (dev->parent && is_nd_blk(dev->parent) && probe) { nd_region = to_nd_region(dev->parent); @@ -526,11 +564,21 @@ struct attribute_group nd_mapping_attribute_group = { }; EXPORT_SYMBOL_GPL(nd_mapping_attribute_group); -void *nd_region_provider_data(struct nd_region *nd_region) +int nd_blk_region_init(struct nd_region *nd_region) { - return nd_region->provider_data; + struct device *dev = &nd_region->dev; + struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); + + if (!is_nd_blk(dev)) + return 0; + + if (nd_region->ndr_mappings < 1) { + dev_err(dev, "invalid BLK region\n"); + return -ENXIO; + } + + return to_nd_blk_region(dev)->enable(nvdimm_bus, dev); } -EXPORT_SYMBOL_GPL(nd_region_provider_data); /** * nd_region_acquire_lane - allocate and lock a lane @@ -591,6 +639,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, { struct nd_region *nd_region; struct device *dev; + void *region_buf; unsigned int i; for (i = 0; i < ndr_desc->num_mappings; i++) { @@ -605,10 +654,30 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, } } - nd_region = kzalloc(sizeof(struct nd_region) - + sizeof(struct nd_mapping) * ndr_desc->num_mappings, - GFP_KERNEL); - if (!nd_region) + if (dev_type == &nd_blk_device_type) { + struct nd_blk_region_desc *ndbr_desc; + struct nd_blk_region *ndbr; + + ndbr_desc = to_blk_region_desc(ndr_desc); + ndbr = kzalloc(sizeof(*ndbr) + sizeof(struct nd_mapping) + * ndr_desc->num_mappings, + GFP_KERNEL); + if (ndbr) { + nd_region = &ndbr->nd_region; + ndbr->enable = ndbr_desc->enable; + ndbr->disable = ndbr_desc->disable; + ndbr->do_io = ndbr_desc->do_io; + } + region_buf = ndbr; + } else { + nd_region = kzalloc(sizeof(struct nd_region) + + sizeof(struct nd_mapping) + * ndr_desc->num_mappings, + GFP_KERNEL); + region_buf = nd_region; + } + + if (!region_buf) return NULL; nd_region->id = ida_simple_get(®ion_ida, 0, 0, GFP_KERNEL); if (nd_region->id < 0) @@ -654,7 +723,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, err_percpu: ida_simple_remove(®ion_ida, nd_region->id); err_id: - kfree(nd_region); + kfree(region_buf); return NULL; } |