[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.ka...@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