Move the CXL DAX region device infrastructure from region.c into a new dax_region.c file.
No functional changes. Signed-off-by: Gregory Price <[email protected]> --- drivers/cxl/core/Makefile | 1 + drivers/cxl/core/core.h | 1 + drivers/cxl/core/dax_region.c | 113 ++++++++++++++++++++++++++++++++++ drivers/cxl/core/region.c | 102 ------------------------------ 4 files changed, 115 insertions(+), 102 deletions(-) create mode 100644 drivers/cxl/core/dax_region.c diff --git a/drivers/cxl/core/Makefile b/drivers/cxl/core/Makefile index 23269c81fd44..36f284d7c500 100644 --- a/drivers/cxl/core/Makefile +++ b/drivers/cxl/core/Makefile @@ -17,6 +17,7 @@ cxl_core-y += cdat.o cxl_core-y += ras.o cxl_core-$(CONFIG_TRACING) += trace.o cxl_core-$(CONFIG_CXL_REGION) += region.o +cxl_core-$(CONFIG_CXL_REGION) += dax_region.o cxl_core-$(CONFIG_CXL_REGION) += pmem_region.o cxl_core-$(CONFIG_CXL_MCE) += mce.o cxl_core-$(CONFIG_CXL_FEATURES) += features.o diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h index 26991de12d76..217dd708a2a6 100644 --- a/drivers/cxl/core/core.h +++ b/drivers/cxl/core/core.h @@ -43,6 +43,7 @@ int cxl_get_poison_by_endpoint(struct cxl_port *port); struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa); u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa); +int devm_cxl_add_dax_region(struct cxl_region *cxlr, enum dax_driver_type); int devm_cxl_add_pmem_region(struct cxl_region *cxlr); #else diff --git a/drivers/cxl/core/dax_region.c b/drivers/cxl/core/dax_region.c new file mode 100644 index 000000000000..0602db5f7248 --- /dev/null +++ b/drivers/cxl/core/dax_region.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright(c) 2022 Intel Corporation. All rights reserved. + * Copyright(c) 2026 Meta Technologies Inc. All rights reserved. + */ +#include <linux/memory_hotplug.h> +#include <linux/device.h> +#include <linux/slab.h> +#include <cxlmem.h> +#include <cxl.h> +#include "core.h" + +static void cxl_dax_region_release(struct device *dev) +{ + struct cxl_dax_region *cxlr_dax = to_cxl_dax_region(dev); + + kfree(cxlr_dax); +} + +static const struct attribute_group *cxl_dax_region_attribute_groups[] = { + &cxl_base_attribute_group, + NULL, +}; + +const struct device_type cxl_dax_region_type = { + .name = "cxl_dax_region", + .release = cxl_dax_region_release, + .groups = cxl_dax_region_attribute_groups, +}; + +static bool is_cxl_dax_region(struct device *dev) +{ + return dev->type == &cxl_dax_region_type; +} + +struct cxl_dax_region *to_cxl_dax_region(struct device *dev) +{ + if (dev_WARN_ONCE(dev, !is_cxl_dax_region(dev), + "not a cxl_dax_region device\n")) + return NULL; + return container_of(dev, struct cxl_dax_region, dev); +} +EXPORT_SYMBOL_NS_GPL(to_cxl_dax_region, "CXL"); + +static struct lock_class_key cxl_dax_region_key; + +static struct cxl_dax_region *cxl_dax_region_alloc(struct cxl_region *cxlr) +{ + struct cxl_region_params *p = &cxlr->params; + struct cxl_dax_region *cxlr_dax; + struct device *dev; + + guard(rwsem_read)(&cxl_rwsem.region); + if (p->state != CXL_CONFIG_COMMIT) + return ERR_PTR(-ENXIO); + + cxlr_dax = kzalloc(sizeof(*cxlr_dax), GFP_KERNEL); + if (!cxlr_dax) + return ERR_PTR(-ENOMEM); + + cxlr_dax->hpa_range.start = p->res->start; + cxlr_dax->hpa_range.end = p->res->end; + + dev = &cxlr_dax->dev; + cxlr_dax->cxlr = cxlr; + device_initialize(dev); + lockdep_set_class(&dev->mutex, &cxl_dax_region_key); + device_set_pm_not_required(dev); + dev->parent = &cxlr->dev; + dev->bus = &cxl_bus_type; + dev->type = &cxl_dax_region_type; + + return cxlr_dax; +} + +static void cxlr_dax_unregister(void *_cxlr_dax) +{ + struct cxl_dax_region *cxlr_dax = _cxlr_dax; + + device_unregister(&cxlr_dax->dev); +} + +int devm_cxl_add_dax_region(struct cxl_region *cxlr, + enum dax_driver_type dax_driver) +{ + struct cxl_dax_region *cxlr_dax; + struct device *dev; + int rc; + + cxlr_dax = cxl_dax_region_alloc(cxlr); + if (IS_ERR(cxlr_dax)) + return PTR_ERR(cxlr_dax); + + cxlr_dax->online_type = mhp_get_default_online_type(); + cxlr_dax->dax_driver = dax_driver; + dev = &cxlr_dax->dev; + rc = dev_set_name(dev, "dax_region%d", cxlr->id); + if (rc) + goto err; + + rc = device_add(dev); + if (rc) + goto err; + + dev_dbg(&cxlr->dev, "%s: register %s\n", dev_name(dev->parent), + dev_name(dev)); + + return devm_add_action_or_reset(&cxlr->dev, cxlr_dax_unregister, + cxlr_dax); +err: + put_device(dev); + return rc; +} diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index fc56f8f03805..61ec939c1462 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -3196,108 +3196,6 @@ static int region_offset_to_dpa_result(struct cxl_region *cxlr, u64 offset, return -ENXIO; } -static void cxl_dax_region_release(struct device *dev) -{ - struct cxl_dax_region *cxlr_dax = to_cxl_dax_region(dev); - - kfree(cxlr_dax); -} - -static const struct attribute_group *cxl_dax_region_attribute_groups[] = { - &cxl_base_attribute_group, - NULL, -}; - -const struct device_type cxl_dax_region_type = { - .name = "cxl_dax_region", - .release = cxl_dax_region_release, - .groups = cxl_dax_region_attribute_groups, -}; - -static bool is_cxl_dax_region(struct device *dev) -{ - return dev->type == &cxl_dax_region_type; -} - -struct cxl_dax_region *to_cxl_dax_region(struct device *dev) -{ - if (dev_WARN_ONCE(dev, !is_cxl_dax_region(dev), - "not a cxl_dax_region device\n")) - return NULL; - return container_of(dev, struct cxl_dax_region, dev); -} -EXPORT_SYMBOL_NS_GPL(to_cxl_dax_region, "CXL"); - -static struct lock_class_key cxl_dax_region_key; - -static struct cxl_dax_region *cxl_dax_region_alloc(struct cxl_region *cxlr) -{ - struct cxl_region_params *p = &cxlr->params; - struct cxl_dax_region *cxlr_dax; - struct device *dev; - - guard(rwsem_read)(&cxl_rwsem.region); - if (p->state != CXL_CONFIG_COMMIT) - return ERR_PTR(-ENXIO); - - cxlr_dax = kzalloc(sizeof(*cxlr_dax), GFP_KERNEL); - if (!cxlr_dax) - return ERR_PTR(-ENOMEM); - - cxlr_dax->hpa_range.start = p->res->start; - cxlr_dax->hpa_range.end = p->res->end; - - dev = &cxlr_dax->dev; - cxlr_dax->cxlr = cxlr; - device_initialize(dev); - lockdep_set_class(&dev->mutex, &cxl_dax_region_key); - device_set_pm_not_required(dev); - dev->parent = &cxlr->dev; - dev->bus = &cxl_bus_type; - dev->type = &cxl_dax_region_type; - - return cxlr_dax; -} - -static void cxlr_dax_unregister(void *_cxlr_dax) -{ - struct cxl_dax_region *cxlr_dax = _cxlr_dax; - - device_unregister(&cxlr_dax->dev); -} - -static int devm_cxl_add_dax_region(struct cxl_region *cxlr, - enum dax_driver_type dax_driver) -{ - struct cxl_dax_region *cxlr_dax; - struct device *dev; - int rc; - - cxlr_dax = cxl_dax_region_alloc(cxlr); - if (IS_ERR(cxlr_dax)) - return PTR_ERR(cxlr_dax); - - cxlr_dax->online_type = mhp_get_default_online_type(); - cxlr_dax->dax_driver = dax_driver; - dev = &cxlr_dax->dev; - rc = dev_set_name(dev, "dax_region%d", cxlr->id); - if (rc) - goto err; - - rc = device_add(dev); - if (rc) - goto err; - - dev_dbg(&cxlr->dev, "%s: register %s\n", dev_name(dev->parent), - dev_name(dev)); - - return devm_add_action_or_reset(&cxlr->dev, cxlr_dax_unregister, - cxlr_dax); -err: - put_device(dev); - return rc; -} - static int match_decoder_by_range(struct device *dev, const void *data) { const struct range *r1, *r2 = data; -- 2.52.0
