diff mbox series

[v3,16/20] cxl/region: factor out interleave granularity setup

Message ID 20240907081836.5801-17-alejandro.lucero-palau@amd.com (mailing list archive)
State Changes Requested
Headers show
Series cxl: add Type2 device support | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 21 this patch: 21
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 6 maintainers not CCed: alison.schofield@intel.com vishal.l.verma@intel.com ira.weiny@intel.com dave.jiang@intel.com jonathan.cameron@huawei.com dave@stgolabs.net
netdev/build_clang success Errors and warnings before: 16 this patch: 16
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 16 this patch: 16
netdev/checkpatch warning WARNING: Co-developed-by and Signed-off-by: name/email do not match
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline success Was 0 now: 0

Commit Message

Lucero Palau, Alejandro Sept. 7, 2024, 8:18 a.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

In preparation for kernel driven region creation, factor out a common
helper from the user-sysfs region setup for interleave granularity.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
Co-developed-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/cxl/core/region.c | 39 +++++++++++++++++++++++----------------
 1 file changed, 23 insertions(+), 16 deletions(-)
diff mbox series

Patch

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index edd710105302..c6fa9e7e4909 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -556,21 +556,14 @@  static ssize_t interleave_granularity_show(struct device *dev,
 	return rc;
 }
 
-static ssize_t interleave_granularity_store(struct device *dev,
-					    struct device_attribute *attr,
-					    const char *buf, size_t len)
+static int set_interleave_granularity(struct cxl_region *cxlr, int val)
 {
-	struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev->parent);
+	struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(cxlr->dev.parent);
 	struct cxl_decoder *cxld = &cxlrd->cxlsd.cxld;
-	struct cxl_region *cxlr = to_cxl_region(dev);
 	struct cxl_region_params *p = &cxlr->params;
-	int rc, val;
+	int rc;
 	u16 ig;
 
-	rc = kstrtoint(buf, 0, &val);
-	if (rc)
-		return rc;
-
 	rc = granularity_to_eig(val, &ig);
 	if (rc)
 		return rc;
@@ -586,16 +579,30 @@  static ssize_t interleave_granularity_store(struct device *dev,
 	if (cxld->interleave_ways > 1 && val != cxld->interleave_granularity)
 		return -EINVAL;
 
+	lockdep_assert_held_write(&cxl_region_rwsem);
+	if (p->state >= CXL_CONFIG_INTERLEAVE_ACTIVE)
+		return -EBUSY;
+
+	p->interleave_granularity = val;
+	return 0;
+}
+
+static ssize_t interleave_granularity_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t len)
+{
+	struct cxl_region *cxlr = to_cxl_region(dev);
+	int rc, val;
+
+	rc = kstrtoint(buf, 0, &val);
+	if (rc)
+		return rc;
+
 	rc = down_write_killable(&cxl_region_rwsem);
 	if (rc)
 		return rc;
-	if (p->state >= CXL_CONFIG_INTERLEAVE_ACTIVE) {
-		rc = -EBUSY;
-		goto out;
-	}
 
-	p->interleave_granularity = val;
-out:
+	rc = set_interleave_granularity(cxlr, val);
 	up_write(&cxl_region_rwsem);
 	if (rc)
 		return rc;