[PATCH v2 4/4] drm/amdgpu: Add supported partition mode node

[Asad Kamal]

Add sysfs node to show supoorted partition modes across all NPS modes

Signed-off-by: Asad Kamal <asad.kamal at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c | 48 +++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
index fc4ab1d8c7c9..10daa6a15e5e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
@@ -463,6 +463,14 @@ static struct attribute *xcp_cfg_res_sysfs_attrs[] = {
 	&XCP_CFG_SYSFS_RES_ATTR_PTR(num_shared), NULL
 };
 
+static const char *xcp_desc[] = {
+	[AMDGPU_SPX_PARTITION_MODE] = "SPX",
+	[AMDGPU_DPX_PARTITION_MODE] = "DPX",
+	[AMDGPU_TPX_PARTITION_MODE] = "TPX",
+	[AMDGPU_QPX_PARTITION_MODE] = "QPX",
+	[AMDGPU_CPX_PARTITION_MODE] = "CPX",
+};
+
 ATTRIBUTE_GROUPS(xcp_cfg_res_sysfs);
 
 #define to_xcp_attr(x) \
@@ -511,6 +519,27 @@ static int amdgpu_xcp_get_res_info(struct amdgpu_xcp_mgr *xcp_mgr,
 }
 
 #define to_xcp_cfg(x) container_of(x, struct amdgpu_xcp_cfg, kobj)
+static ssize_t supported_xcp_configs_show(struct kobject *kobj,
+					  struct kobj_attribute *attr, char *buf)
+{
+	struct amdgpu_xcp_cfg *xcp_cfg = to_xcp_cfg(kobj);
+	struct amdgpu_xcp_mgr *xcp_mgr = xcp_cfg->xcp_mgr;
+	int size = 0, mode;
+	char *sep = "";
+
+	if (!xcp_mgr || !xcp_mgr->supp_xcp_modes)
+		return sysfs_emit(buf, "Not supported\n");
+
+	for_each_inst(mode, xcp_mgr->supp_xcp_modes) {
+		size += sysfs_emit_at(buf, size, "%s%s", sep, xcp_desc[mode]);
+		sep = ", ";
+	}
+
+	size += sysfs_emit_at(buf, size, "\n");
+
+	return size;
+}
+
 static ssize_t xcp_config_show(struct kobject *kobj,
 			       struct kobj_attribute *attr, char *buf)
 {
@@ -564,6 +593,19 @@ static const struct kobj_type xcp_cfg_sysfs_ktype = {
 	.sysfs_ops = &kobj_sysfs_ops,
 };
 
+static struct kobj_attribute supp_part_sysfs_mode =
+	__ATTR_RO(supported_xcp_configs);
+
+static const struct kobj_type supp_part_sysfs_ktype = {
+	.sysfs_ops = &kobj_sysfs_ops,
+};
+
+static const struct attribute *xcp_attrs[] = {
+	&supp_part_sysfs_mode.attr,
+	&xcp_cfg_sysfs_mode.attr,
+	NULL,
+};
+
 void amdgpu_xcp_cfg_sysfs_init(struct amdgpu_device *adev)
 {
 	struct amdgpu_xcp_res_details *xcp_res;
@@ -583,7 +625,7 @@ void amdgpu_xcp_cfg_sysfs_init(struct amdgpu_device *adev)
 	if (r)
 		goto err1;
 
-	r = sysfs_create_file(&xcp_cfg->kobj, &xcp_cfg_sysfs_mode.attr);
+	r = sysfs_create_files(&xcp_cfg->kobj, xcp_attrs);
 	if (r)
 		goto err1;
 
@@ -611,7 +653,7 @@ void amdgpu_xcp_cfg_sysfs_init(struct amdgpu_device *adev)
 		kobject_put(&xcp_res->kobj);
 	}
 
-	sysfs_remove_file(&xcp_cfg->kobj, &xcp_cfg_sysfs_mode.attr);
+	sysfs_remove_files(&xcp_cfg->kobj, xcp_attrs);
 err1:
 	kobject_put(&xcp_cfg->kobj);
 }
@@ -631,6 +673,6 @@ void amdgpu_xcp_cfg_sysfs_fini(struct amdgpu_device *adev)
 		kobject_put(&xcp_res->kobj);
 	}
 
-	sysfs_remove_file(&xcp_cfg->kobj, &xcp_cfg_sysfs_mode.attr);
+	sysfs_remove_files(&xcp_cfg->kobj, xcp_attrs);
 	kobject_put(&xcp_cfg->kobj);
 }
-- 
2.46.0