[PATCH i-g-t 1/4] lib/xe/xe_sriov_debugfs: Add debugfs get/set functions for u32, u64, bool

[Marcin Bernatowicz]

Add helper functions to get and set SR-IOV debugfs attributes for u32,
u64, and boolean types.

Functions added:
- __xe_sriov_pf_debugfs_get_u32
- __xe_sriov_pf_debugfs_set_u32
- __xe_sriov_pf_debugfs_get_u64
- __xe_sriov_pf_debugfs_set_u64
- __xe_sriov_pf_debugfs_get_boolean
- __xe_sriov_pf_debugfs_set_boolean

Signed-off-by: Marcin Bernatowicz <marcin.bernatowicz at linux.intel.com>
Cc: Adam Miszczak <adam.miszczak at linux.intel.com>
Cc: Jakub Kolakowski <jakub1.kolakowski at intel.com>
Cc: Lukasz Laguna <lukasz.laguna at intel.com>
Cc: Michał Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Narasimha C V <narasimha.c.v at intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski at intel.com>
Cc: Satyanarayana K V P <satyanarayana.k.v.p at intel.com>
Cc: Tomasz Lis <tomasz.lis at intel.com>
---
 lib/xe/xe_sriov_debugfs.c | 194 ++++++++++++++++++++++++++++++++++++++
 lib/xe/xe_sriov_debugfs.h |  18 ++++
 2 files changed, 212 insertions(+)

diff --git a/lib/xe/xe_sriov_debugfs.c b/lib/xe/xe_sriov_debugfs.c
index c87f91492..038912f23 100644
--- a/lib/xe/xe_sriov_debugfs.c
+++ b/lib/xe/xe_sriov_debugfs.c
@@ -9,6 +9,7 @@
 #include "drmtest.h"
 #include "igt_debugfs.h"
 #include "igt_sriov_device.h"
+#include "igt_sysfs.h"
 #include "xe/xe_query.h"
 #include "xe/xe_sriov_debugfs.h"
 #include "xe/xe_sriov_provisioning.h"
@@ -204,3 +205,196 @@ cleanup:
 
 	return ret;
 }
+
+static int xe_sriov_pf_debugfs_path_open(int pf, unsigned int vf_num,
+					 unsigned int gt_num)
+{
+	char path[PATH_MAX];
+
+	if (igt_debug_on_f(!xe_sriov_pf_debugfs_path(pf, vf_num, gt_num, path,
+						     sizeof(path)),
+			   "path: %s\n", path))
+		return -1;
+
+	return open(path, O_RDONLY);
+}
+
+/**
+ * __xe_sriov_pf_debugfs_get_u32:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: pointer to read value
+ *
+ * Reads SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_get_u32(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint32_t *value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return false;
+
+	ret = __igt_sysfs_get_u32(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
+
+/**
+ * __xe_sriov_pf_debugfs_set_u32:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: u32 value to be set
+ *
+ * Writes @value to SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_set_u32(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint32_t value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return dir;
+
+	ret = __igt_sysfs_set_u32(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
+
+/**
+ * __xe_sriov_pf_debugfs_get_u64:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: pointer to read value
+ *
+ * Reads SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_get_u64(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint64_t *value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return dir;
+
+	ret = __igt_sysfs_get_u64(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
+
+/**
+ * __xe_sriov_pf_debugfs_set_u64:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: u64 value to be set
+ *
+ * Writes @value to SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_set_u64(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint64_t value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return dir;
+
+	ret = __igt_sysfs_set_u64(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
+
+/**
+ * __xe_sriov_pf_debugfs_get_boolean:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: pointer to read value
+ *
+ * Reads SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_get_boolean(int pf, unsigned int vf_num,
+				      unsigned int gt_num, const char *attr,
+				      bool *value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return dir;
+
+	ret = __igt_sysfs_get_boolean(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
+
+/**
+ * __xe_sriov_pf_debugfs_set_boolean:
+ * @pf: PF device file descriptor
+ * @vf_num: VF number (1-based) or 0 for PF
+ * @gt_num: GT number
+ * @attr: debugfs attribute name
+ * @value: u64 value to be set
+ *
+ * Writes @value to SR-IOV debugfs attribute @attr for given PF device @pf,
+ * VF number @vf_num on GT @gt_num.
+ *
+ * Return: 0 on success and negative error on failure.
+ */
+int __xe_sriov_pf_debugfs_set_boolean(int pf, unsigned int vf_num,
+				      unsigned int gt_num, const char *attr,
+				      bool value)
+{
+	bool ret;
+	int dir;
+
+	dir = xe_sriov_pf_debugfs_path_open(pf, vf_num, gt_num);
+	if (igt_debug_on(dir < 0))
+		return dir;
+
+	ret = __igt_sysfs_set_boolean(dir, attr, value);
+	close(dir);
+
+	return ret ? 0 : -1;
+}
diff --git a/lib/xe/xe_sriov_debugfs.h b/lib/xe/xe_sriov_debugfs.h
index 856445e76..2db965f9b 100644
--- a/lib/xe/xe_sriov_debugfs.h
+++ b/lib/xe/xe_sriov_debugfs.h
@@ -16,5 +16,23 @@ int xe_sriov_pf_debugfs_read_provisioned_ranges(int pf_fd, enum xe_sriov_shared_
 						unsigned int gt_id,
 						struct xe_sriov_provisioned_range **ranges,
 						unsigned int *nr_ranges);
+int __xe_sriov_pf_debugfs_get_u32(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint32_t *value);
+int __xe_sriov_pf_debugfs_set_u32(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint32_t value);
+int __xe_sriov_pf_debugfs_get_u64(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint64_t *value);
+int __xe_sriov_pf_debugfs_set_u64(int pf, unsigned int vf_num,
+				  unsigned int gt_num, const char *attr,
+				  uint64_t value);
+int __xe_sriov_pf_debugfs_get_boolean(int pf, unsigned int vf_num,
+				      unsigned int gt_num, const char *attr,
+				      bool *value);
+int __xe_sriov_pf_debugfs_set_boolean(int pf, unsigned int vf_num,
+				      unsigned int gt_num, const char *attr,
+				      bool value);
 
 #endif /* __XE_SRIOV_DEBUGFS_H__ */
-- 
2.31.1