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cxl/core: Move pmem functionality
Refactor the pmem / nvdimm-bridge functionality from core/bus.c to core/pmem.c. Introduce drivers/core/core.h to communicate data structures and helpers between the core bus and other functionality that registers devices on the bus. Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/162792538899.368511.3881663908293411300.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
parent
95aaed2668
commit
06737cd0d2
@ -39,6 +39,9 @@ CXL Core
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.. kernel-doc:: drivers/cxl/core/bus.c
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:doc: cxl core
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.. kernel-doc:: drivers/cxl/core/pmem.c
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:internal:
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External Interfaces
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===================
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@ -3,3 +3,4 @@ obj-$(CONFIG_CXL_BUS) += cxl_core.o
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ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=CXL -I$(srctree)/drivers/cxl
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cxl_core-y := bus.o
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cxl_core-y += pmem.o
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@ -8,6 +8,7 @@
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#include <linux/idr.h>
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#include <cxlmem.h>
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#include <cxl.h>
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#include "core.h"
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/**
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* DOC: cxl core
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@ -37,7 +38,7 @@ static struct attribute *cxl_base_attributes[] = {
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NULL,
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};
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static struct attribute_group cxl_base_attribute_group = {
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struct attribute_group cxl_base_attribute_group = {
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.attrs = cxl_base_attributes,
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};
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@ -514,11 +515,6 @@ err:
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return ERR_PTR(rc);
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}
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static void unregister_dev(void *dev)
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{
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device_unregister(dev);
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}
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struct cxl_decoder *
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devm_cxl_add_decoder(struct device *host, struct cxl_port *port, int nr_targets,
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resource_size_t base, resource_size_t len,
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@ -543,7 +539,7 @@ devm_cxl_add_decoder(struct device *host, struct cxl_port *port, int nr_targets,
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if (rc)
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goto err;
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rc = devm_add_action_or_reset(host, unregister_dev, dev);
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rc = devm_add_action_or_reset(host, unregister_cxl_dev, dev);
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if (rc)
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return ERR_PTR(rc);
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return cxld;
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@ -626,201 +622,6 @@ void cxl_probe_component_regs(struct device *dev, void __iomem *base,
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}
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EXPORT_SYMBOL_GPL(cxl_probe_component_regs);
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static void cxl_nvdimm_bridge_release(struct device *dev)
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{
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struct cxl_nvdimm_bridge *cxl_nvb = to_cxl_nvdimm_bridge(dev);
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kfree(cxl_nvb);
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}
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static const struct attribute_group *cxl_nvdimm_bridge_attribute_groups[] = {
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&cxl_base_attribute_group,
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NULL,
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};
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static const struct device_type cxl_nvdimm_bridge_type = {
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.name = "cxl_nvdimm_bridge",
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.release = cxl_nvdimm_bridge_release,
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.groups = cxl_nvdimm_bridge_attribute_groups,
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};
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struct cxl_nvdimm_bridge *to_cxl_nvdimm_bridge(struct device *dev)
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{
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if (dev_WARN_ONCE(dev, dev->type != &cxl_nvdimm_bridge_type,
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"not a cxl_nvdimm_bridge device\n"))
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return NULL;
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return container_of(dev, struct cxl_nvdimm_bridge, dev);
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}
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EXPORT_SYMBOL_GPL(to_cxl_nvdimm_bridge);
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static struct cxl_nvdimm_bridge *
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cxl_nvdimm_bridge_alloc(struct cxl_port *port)
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{
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struct cxl_nvdimm_bridge *cxl_nvb;
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struct device *dev;
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cxl_nvb = kzalloc(sizeof(*cxl_nvb), GFP_KERNEL);
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if (!cxl_nvb)
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return ERR_PTR(-ENOMEM);
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dev = &cxl_nvb->dev;
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cxl_nvb->port = port;
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cxl_nvb->state = CXL_NVB_NEW;
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device_initialize(dev);
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device_set_pm_not_required(dev);
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dev->parent = &port->dev;
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dev->bus = &cxl_bus_type;
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dev->type = &cxl_nvdimm_bridge_type;
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return cxl_nvb;
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}
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static void unregister_nvb(void *_cxl_nvb)
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{
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struct cxl_nvdimm_bridge *cxl_nvb = _cxl_nvb;
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bool flush;
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/*
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* If the bridge was ever activated then there might be in-flight state
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* work to flush. Once the state has been changed to 'dead' then no new
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* work can be queued by user-triggered bind.
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*/
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device_lock(&cxl_nvb->dev);
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flush = cxl_nvb->state != CXL_NVB_NEW;
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cxl_nvb->state = CXL_NVB_DEAD;
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device_unlock(&cxl_nvb->dev);
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/*
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* Even though the device core will trigger device_release_driver()
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* before the unregister, it does not know about the fact that
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* cxl_nvdimm_bridge_driver defers ->remove() work. So, do the driver
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* release not and flush it before tearing down the nvdimm device
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* hierarchy.
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*/
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device_release_driver(&cxl_nvb->dev);
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if (flush)
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flush_work(&cxl_nvb->state_work);
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device_unregister(&cxl_nvb->dev);
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}
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struct cxl_nvdimm_bridge *devm_cxl_add_nvdimm_bridge(struct device *host,
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struct cxl_port *port)
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{
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struct cxl_nvdimm_bridge *cxl_nvb;
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struct device *dev;
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int rc;
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if (!IS_ENABLED(CONFIG_CXL_PMEM))
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return ERR_PTR(-ENXIO);
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cxl_nvb = cxl_nvdimm_bridge_alloc(port);
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if (IS_ERR(cxl_nvb))
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return cxl_nvb;
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dev = &cxl_nvb->dev;
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rc = dev_set_name(dev, "nvdimm-bridge");
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if (rc)
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goto err;
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rc = device_add(dev);
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if (rc)
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goto err;
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rc = devm_add_action_or_reset(host, unregister_nvb, cxl_nvb);
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if (rc)
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return ERR_PTR(rc);
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return cxl_nvb;
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err:
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put_device(dev);
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return ERR_PTR(rc);
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}
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EXPORT_SYMBOL_GPL(devm_cxl_add_nvdimm_bridge);
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static void cxl_nvdimm_release(struct device *dev)
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{
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struct cxl_nvdimm *cxl_nvd = to_cxl_nvdimm(dev);
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kfree(cxl_nvd);
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}
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static const struct attribute_group *cxl_nvdimm_attribute_groups[] = {
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&cxl_base_attribute_group,
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NULL,
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};
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static const struct device_type cxl_nvdimm_type = {
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.name = "cxl_nvdimm",
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.release = cxl_nvdimm_release,
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.groups = cxl_nvdimm_attribute_groups,
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};
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bool is_cxl_nvdimm(struct device *dev)
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{
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return dev->type == &cxl_nvdimm_type;
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}
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EXPORT_SYMBOL_GPL(is_cxl_nvdimm);
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struct cxl_nvdimm *to_cxl_nvdimm(struct device *dev)
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{
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if (dev_WARN_ONCE(dev, !is_cxl_nvdimm(dev),
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"not a cxl_nvdimm device\n"))
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return NULL;
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return container_of(dev, struct cxl_nvdimm, dev);
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}
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EXPORT_SYMBOL_GPL(to_cxl_nvdimm);
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static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd)
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{
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struct cxl_nvdimm *cxl_nvd;
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struct device *dev;
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cxl_nvd = kzalloc(sizeof(*cxl_nvd), GFP_KERNEL);
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if (!cxl_nvd)
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return ERR_PTR(-ENOMEM);
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dev = &cxl_nvd->dev;
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cxl_nvd->cxlmd = cxlmd;
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device_initialize(dev);
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device_set_pm_not_required(dev);
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dev->parent = &cxlmd->dev;
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dev->bus = &cxl_bus_type;
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dev->type = &cxl_nvdimm_type;
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return cxl_nvd;
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}
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int devm_cxl_add_nvdimm(struct device *host, struct cxl_memdev *cxlmd)
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{
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struct cxl_nvdimm *cxl_nvd;
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struct device *dev;
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int rc;
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cxl_nvd = cxl_nvdimm_alloc(cxlmd);
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if (IS_ERR(cxl_nvd))
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return PTR_ERR(cxl_nvd);
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dev = &cxl_nvd->dev;
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rc = dev_set_name(dev, "pmem%d", cxlmd->id);
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if (rc)
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goto err;
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rc = device_add(dev);
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if (rc)
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goto err;
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dev_dbg(host, "%s: register %s\n", dev_name(dev->parent),
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dev_name(dev));
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return devm_add_action_or_reset(host, unregister_dev, dev);
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err:
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put_device(dev);
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return rc;
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}
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EXPORT_SYMBOL_GPL(devm_cxl_add_nvdimm);
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/**
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* cxl_probe_device_regs() - Detect CXL Device register blocks
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* @dev: Host device of the @base mapping
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17
drivers/cxl/core/core.h
Normal file
17
drivers/cxl/core/core.h
Normal file
@ -0,0 +1,17 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright(c) 2020 Intel Corporation. */
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#ifndef __CXL_CORE_H__
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#define __CXL_CORE_H__
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extern const struct device_type cxl_nvdimm_bridge_type;
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extern const struct device_type cxl_nvdimm_type;
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extern struct attribute_group cxl_base_attribute_group;
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static inline void unregister_cxl_dev(void *dev)
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{
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device_unregister(dev);
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}
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#endif /* __CXL_CORE_H__ */
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204
drivers/cxl/core/pmem.c
Normal file
204
drivers/cxl/core/pmem.c
Normal file
@ -0,0 +1,204 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2020 Intel Corporation. */
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <cxlmem.h>
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#include <cxl.h>
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#include "core.h"
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static void cxl_nvdimm_bridge_release(struct device *dev)
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{
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struct cxl_nvdimm_bridge *cxl_nvb = to_cxl_nvdimm_bridge(dev);
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kfree(cxl_nvb);
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}
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static const struct attribute_group *cxl_nvdimm_bridge_attribute_groups[] = {
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&cxl_base_attribute_group,
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NULL,
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};
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const struct device_type cxl_nvdimm_bridge_type = {
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.name = "cxl_nvdimm_bridge",
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.release = cxl_nvdimm_bridge_release,
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.groups = cxl_nvdimm_bridge_attribute_groups,
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};
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struct cxl_nvdimm_bridge *to_cxl_nvdimm_bridge(struct device *dev)
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{
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if (dev_WARN_ONCE(dev, dev->type != &cxl_nvdimm_bridge_type,
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"not a cxl_nvdimm_bridge device\n"))
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return NULL;
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return container_of(dev, struct cxl_nvdimm_bridge, dev);
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}
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EXPORT_SYMBOL_GPL(to_cxl_nvdimm_bridge);
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static struct cxl_nvdimm_bridge *
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cxl_nvdimm_bridge_alloc(struct cxl_port *port)
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{
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struct cxl_nvdimm_bridge *cxl_nvb;
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struct device *dev;
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cxl_nvb = kzalloc(sizeof(*cxl_nvb), GFP_KERNEL);
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if (!cxl_nvb)
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return ERR_PTR(-ENOMEM);
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dev = &cxl_nvb->dev;
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cxl_nvb->port = port;
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cxl_nvb->state = CXL_NVB_NEW;
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device_initialize(dev);
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device_set_pm_not_required(dev);
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dev->parent = &port->dev;
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dev->bus = &cxl_bus_type;
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dev->type = &cxl_nvdimm_bridge_type;
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return cxl_nvb;
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}
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static void unregister_nvb(void *_cxl_nvb)
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{
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struct cxl_nvdimm_bridge *cxl_nvb = _cxl_nvb;
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bool flush;
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/*
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* If the bridge was ever activated then there might be in-flight state
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* work to flush. Once the state has been changed to 'dead' then no new
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* work can be queued by user-triggered bind.
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*/
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device_lock(&cxl_nvb->dev);
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flush = cxl_nvb->state != CXL_NVB_NEW;
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cxl_nvb->state = CXL_NVB_DEAD;
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device_unlock(&cxl_nvb->dev);
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/*
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* Even though the device core will trigger device_release_driver()
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* before the unregister, it does not know about the fact that
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* cxl_nvdimm_bridge_driver defers ->remove() work. So, do the driver
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* release not and flush it before tearing down the nvdimm device
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* hierarchy.
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*/
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device_release_driver(&cxl_nvb->dev);
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if (flush)
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flush_work(&cxl_nvb->state_work);
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device_unregister(&cxl_nvb->dev);
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}
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struct cxl_nvdimm_bridge *devm_cxl_add_nvdimm_bridge(struct device *host,
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struct cxl_port *port)
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{
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struct cxl_nvdimm_bridge *cxl_nvb;
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struct device *dev;
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int rc;
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if (!IS_ENABLED(CONFIG_CXL_PMEM))
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return ERR_PTR(-ENXIO);
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cxl_nvb = cxl_nvdimm_bridge_alloc(port);
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if (IS_ERR(cxl_nvb))
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return cxl_nvb;
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dev = &cxl_nvb->dev;
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rc = dev_set_name(dev, "nvdimm-bridge");
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if (rc)
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goto err;
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rc = device_add(dev);
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if (rc)
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goto err;
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rc = devm_add_action_or_reset(host, unregister_nvb, cxl_nvb);
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if (rc)
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return ERR_PTR(rc);
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return cxl_nvb;
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err:
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put_device(dev);
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return ERR_PTR(rc);
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}
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EXPORT_SYMBOL_GPL(devm_cxl_add_nvdimm_bridge);
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static void cxl_nvdimm_release(struct device *dev)
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{
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struct cxl_nvdimm *cxl_nvd = to_cxl_nvdimm(dev);
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kfree(cxl_nvd);
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}
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static const struct attribute_group *cxl_nvdimm_attribute_groups[] = {
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&cxl_base_attribute_group,
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NULL,
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};
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const struct device_type cxl_nvdimm_type = {
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.name = "cxl_nvdimm",
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.release = cxl_nvdimm_release,
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.groups = cxl_nvdimm_attribute_groups,
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};
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bool is_cxl_nvdimm(struct device *dev)
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{
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return dev->type == &cxl_nvdimm_type;
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}
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EXPORT_SYMBOL_GPL(is_cxl_nvdimm);
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struct cxl_nvdimm *to_cxl_nvdimm(struct device *dev)
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{
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if (dev_WARN_ONCE(dev, !is_cxl_nvdimm(dev),
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"not a cxl_nvdimm device\n"))
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return NULL;
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return container_of(dev, struct cxl_nvdimm, dev);
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}
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EXPORT_SYMBOL_GPL(to_cxl_nvdimm);
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static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd)
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{
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struct cxl_nvdimm *cxl_nvd;
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struct device *dev;
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cxl_nvd = kzalloc(sizeof(*cxl_nvd), GFP_KERNEL);
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if (!cxl_nvd)
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return ERR_PTR(-ENOMEM);
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dev = &cxl_nvd->dev;
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cxl_nvd->cxlmd = cxlmd;
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device_initialize(dev);
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device_set_pm_not_required(dev);
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dev->parent = &cxlmd->dev;
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dev->bus = &cxl_bus_type;
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dev->type = &cxl_nvdimm_type;
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return cxl_nvd;
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}
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int devm_cxl_add_nvdimm(struct device *host, struct cxl_memdev *cxlmd)
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{
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struct cxl_nvdimm *cxl_nvd;
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struct device *dev;
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int rc;
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||||
cxl_nvd = cxl_nvdimm_alloc(cxlmd);
|
||||
if (IS_ERR(cxl_nvd))
|
||||
return PTR_ERR(cxl_nvd);
|
||||
|
||||
dev = &cxl_nvd->dev;
|
||||
rc = dev_set_name(dev, "pmem%d", cxlmd->id);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
rc = device_add(dev);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
dev_dbg(host, "%s: register %s\n", dev_name(dev->parent),
|
||||
dev_name(dev));
|
||||
|
||||
return devm_add_action_or_reset(host, unregister_cxl_dev, dev);
|
||||
|
||||
err:
|
||||
put_device(dev);
|
||||
return rc;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(devm_cxl_add_nvdimm);
|
||||
Loading…
Reference in New Issue
Block a user