diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2023-02-10 12:05:39 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-02-11 04:31:58 +0300 |
| commit | 7d505f982f53189da819581ad4cc13c8cef76803 (patch) | |
| tree | 57894cabde6c0bb9897c5b3f1cb04841518d713a /drivers/cxl | |
| parent | 8752efd2c79c2f0d97011c414f07340b51c99499 (diff) | |
| download | linux-7d505f982f53189da819581ad4cc13c8cef76803.tar.xz | |
cxl/region: Add a mode attribute for regions
In preparation for a new region type, "ram" regions, add a mode
attribute to clarify the mode of the decoders that can be added to a
region. Share the internals of mode_show() (for decoders) with the
region case.
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Gregory Price <gregory.price@memverge.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Fan Ni <fan.ni@samsung.com>
Link: https://lore.kernel.org/r/167601993930.1924368.4305018565539515665.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/port.c | 12 | ||||
| -rw-r--r-- | drivers/cxl/core/region.c | 10 | ||||
| -rw-r--r-- | drivers/cxl/cxl.h | 14 |
3 files changed, 25 insertions, 11 deletions
diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 317bcf4dbd9d..1e541956f605 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -180,17 +180,7 @@ static ssize_t mode_show(struct device *dev, struct device_attribute *attr, { struct cxl_endpoint_decoder *cxled = to_cxl_endpoint_decoder(dev); - switch (cxled->mode) { - case CXL_DECODER_RAM: - return sysfs_emit(buf, "ram\n"); - case CXL_DECODER_PMEM: - return sysfs_emit(buf, "pmem\n"); - case CXL_DECODER_NONE: - return sysfs_emit(buf, "none\n"); - case CXL_DECODER_MIXED: - default: - return sysfs_emit(buf, "mixed\n"); - } + return sysfs_emit(buf, "%s\n", cxl_decoder_mode_name(cxled->mode)); } static ssize_t mode_store(struct device *dev, struct device_attribute *attr, diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 60828d01972a..17d2d0c12725 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -458,6 +458,15 @@ static ssize_t resource_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(resource); +static ssize_t mode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct cxl_region *cxlr = to_cxl_region(dev); + + return sysfs_emit(buf, "%s\n", cxl_decoder_mode_name(cxlr->mode)); +} +static DEVICE_ATTR_RO(mode); + static int alloc_hpa(struct cxl_region *cxlr, resource_size_t size) { struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(cxlr->dev.parent); @@ -585,6 +594,7 @@ static struct attribute *cxl_region_attrs[] = { &dev_attr_interleave_granularity.attr, &dev_attr_resource.attr, &dev_attr_size.attr, + &dev_attr_mode.attr, NULL, }; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index aa3af3bb73b2..ca76879af1de 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -320,6 +320,20 @@ enum cxl_decoder_mode { CXL_DECODER_DEAD, }; +static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) +{ + static const char * const names[] = { + [CXL_DECODER_NONE] = "none", + [CXL_DECODER_RAM] = "ram", + [CXL_DECODER_PMEM] = "pmem", + [CXL_DECODER_MIXED] = "mixed", + }; + + if (mode >= CXL_DECODER_NONE && mode <= CXL_DECODER_MIXED) + return names[mode]; + return "mixed"; +} + /** * struct cxl_endpoint_decoder - Endpoint / SPA to DPA decoder * @cxld: base cxl_decoder_object |