mirror of
https://github.com/torvalds/linux.git
synced 2024-12-03 17:41:22 +00:00
04ad63f086
The LIBNVDIMM subsystem is a platform agnostic representation of system NVDIMM / persistent memory resources. To date, the CXL subsystem's interaction with LIBNVDIMM has been to register an nvdimm-bridge device and cxl_nvdimm objects to proxy CXL capabilities into existing LIBNVDIMM subsystem mechanics. With regions the approach is the same. Create a new cxl_pmem_region object to proxy CXL region details into a LIBNVDIMM definition. With this enabling LIBNVDIMM can partition CXL persistent memory regions with legacy namespace labels. A follow-on patch will add CXL region label and CXL namespace label support to persist region configurations across driver reload / system-reset events. Co-developed-by: Ben Widawsky <bwidawsk@kernel.org> Signed-off-by: Ben Widawsky <bwidawsk@kernel.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/165784340111.1758207.3036498385188290968.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/* Copyright(c) 2020 Intel Corporation. */
|
|
|
|
#ifndef __CXL_CORE_H__
|
|
#define __CXL_CORE_H__
|
|
|
|
extern const struct device_type cxl_nvdimm_bridge_type;
|
|
extern const struct device_type cxl_nvdimm_type;
|
|
|
|
extern struct attribute_group cxl_base_attribute_group;
|
|
|
|
#ifdef CONFIG_CXL_REGION
|
|
extern struct device_attribute dev_attr_create_pmem_region;
|
|
extern struct device_attribute dev_attr_delete_region;
|
|
extern struct device_attribute dev_attr_region;
|
|
extern const struct device_type cxl_pmem_region_type;
|
|
extern const struct device_type cxl_region_type;
|
|
void cxl_decoder_kill_region(struct cxl_endpoint_decoder *cxled);
|
|
#define CXL_REGION_ATTR(x) (&dev_attr_##x.attr)
|
|
#define CXL_REGION_TYPE(x) (&cxl_region_type)
|
|
#define SET_CXL_REGION_ATTR(x) (&dev_attr_##x.attr),
|
|
#define CXL_PMEM_REGION_TYPE(x) (&cxl_pmem_region_type)
|
|
int cxl_region_init(void);
|
|
void cxl_region_exit(void);
|
|
#else
|
|
static inline void cxl_decoder_kill_region(struct cxl_endpoint_decoder *cxled)
|
|
{
|
|
}
|
|
static inline int cxl_region_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void cxl_region_exit(void)
|
|
{
|
|
}
|
|
#define CXL_REGION_ATTR(x) NULL
|
|
#define CXL_REGION_TYPE(x) NULL
|
|
#define SET_CXL_REGION_ATTR(x)
|
|
#define CXL_PMEM_REGION_TYPE(x) NULL
|
|
#endif
|
|
|
|
struct cxl_send_command;
|
|
struct cxl_mem_query_commands;
|
|
int cxl_query_cmd(struct cxl_memdev *cxlmd,
|
|
struct cxl_mem_query_commands __user *q);
|
|
int cxl_send_cmd(struct cxl_memdev *cxlmd, struct cxl_send_command __user *s);
|
|
void __iomem *devm_cxl_iomap_block(struct device *dev, resource_size_t addr,
|
|
resource_size_t length);
|
|
|
|
struct dentry *cxl_debugfs_create_dir(const char *dir);
|
|
int cxl_dpa_set_mode(struct cxl_endpoint_decoder *cxled,
|
|
enum cxl_decoder_mode mode);
|
|
int cxl_dpa_alloc(struct cxl_endpoint_decoder *cxled, unsigned long long size);
|
|
int cxl_dpa_free(struct cxl_endpoint_decoder *cxled);
|
|
resource_size_t cxl_dpa_size(struct cxl_endpoint_decoder *cxled);
|
|
resource_size_t cxl_dpa_resource_start(struct cxl_endpoint_decoder *cxled);
|
|
extern struct rw_semaphore cxl_dpa_rwsem;
|
|
|
|
bool is_switch_decoder(struct device *dev);
|
|
struct cxl_switch_decoder *to_cxl_switch_decoder(struct device *dev);
|
|
static inline struct cxl_ep *cxl_ep_load(struct cxl_port *port,
|
|
struct cxl_memdev *cxlmd)
|
|
{
|
|
if (!port)
|
|
return NULL;
|
|
|
|
return xa_load(&port->endpoints, (unsigned long)&cxlmd->dev);
|
|
}
|
|
|
|
int cxl_memdev_init(void);
|
|
void cxl_memdev_exit(void);
|
|
void cxl_mbox_init(void);
|
|
|
|
#endif /* __CXL_CORE_H__ */
|