Am 2022-11-21 um 00:13 schrieb Ma Jun:
From: Felix Kuehling <felix.kuehl...@gmail.com>
Move the topology-locked part of kfd_topology_add_device into a separate
function to simlpify error handling and release the topology lock
consistently.
Reported-by: Dan Carpenter <erro...@gmail.com>
Signed-off-by: Felix Kuehling <felix.kuehl...@gmail.com>
Signed-off-by: Ma Jun <jun....@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 120 ++++++++++++----------
1 file changed, 65 insertions(+), 55 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 8c555c32ea70..7d6fbfbfeb79 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -1938,21 +1938,75 @@ static void kfd_fill_cache_non_crat_info(struct
kfd_topology_device *dev, struct
pr_debug("Added [%d] GPU cache entries\n", num_of_entries);
}
+static int kfd_topology_add_device_locked(struct kfd_dev *gpu, uint32_t gpu_id,
+ struct kfd_topology_device **dev)
+{
+ int proximity_domain = ++topology_crat_proximity_domain;
+ struct list_head temp_topology_device_list;
+ void *crat_image = NULL;
+ size_t image_size = 0;
+ int res;
+
+ res = kfd_create_crat_image_virtual(&crat_image, &image_size,
+ COMPUTE_UNIT_GPU, gpu,
+ proximity_domain);
+ if (res) {
+ pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
+ gpu_id);
+ topology_crat_proximity_domain--;
+ goto err;
+ }
+
+ INIT_LIST_HEAD(&temp_topology_device_list);
+
+ res = kfd_parse_crat_table(crat_image,
+ &temp_topology_device_list,
+ proximity_domain);
+ if (res) {
+ pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
+ gpu_id);
+ topology_crat_proximity_domain--;
+ goto err;
+ }
+
+ kfd_topology_update_device_list(&temp_topology_device_list,
+ &topology_device_list);
+
+ *dev = kfd_assign_gpu(gpu);
+ if (WARN_ON(!*dev)) {
+ res = -ENODEV;
+ goto err;
+ }
+
+ /* Fill the cache affinity information here for the GPUs
+ * using VCRAT
+ */
+ kfd_fill_cache_non_crat_info(*dev, gpu);
+
+ /* Update the SYSFS tree, since we added another topology
+ * device
+ */
+ res = kfd_topology_update_sysfs();
+ if (!res)
+ sys_props.generation_count++;
+ else
+ pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology.
res=%d\n",
+ gpu_id, res);
+
+err:
+ kfd_destroy_crat_image(crat_image);
+ return res;
+}
+
int kfd_topology_add_device(struct kfd_dev *gpu)
{
uint32_t gpu_id;
struct kfd_topology_device *dev;
struct kfd_cu_info cu_info;
int res = 0;
- struct list_head temp_topology_device_list;
- void *crat_image = NULL;
- size_t image_size = 0;
- int proximity_domain;
int i;
const char *asic_name = amdgpu_asic_name[gpu->adev->asic_type];
- INIT_LIST_HEAD(&temp_topology_device_list);
-
gpu_id = kfd_generate_gpu_id(gpu);
pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
@@ -1964,54 +2018,11 @@ int kfd_topology_add_device(struct kfd_dev *gpu)
*/
down_write(&topology_lock);
dev = kfd_assign_gpu(gpu);
- if (!dev) {
- proximity_domain = ++topology_crat_proximity_domain;
-
- res = kfd_create_crat_image_virtual(&crat_image, &image_size,
- COMPUTE_UNIT_GPU, gpu,
- proximity_domain);
- if (res) {
- pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
- gpu_id);
- topology_crat_proximity_domain--;
- return res;
- }
-
- res = kfd_parse_crat_table(crat_image,
- &temp_topology_device_list,
- proximity_domain);
- if (res) {
- pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
- gpu_id);
- topology_crat_proximity_domain--;
- goto err;
- }
-
- kfd_topology_update_device_list(&temp_topology_device_list,
- &topology_device_list);
-
- dev = kfd_assign_gpu(gpu);
- if (WARN_ON(!dev)) {
- res = -ENODEV;
- goto err;
- }
-
- /* Fill the cache affinity information here for the GPUs
- * using VCRAT
- */
- kfd_fill_cache_non_crat_info(dev, gpu);
-
- /* Update the SYSFS tree, since we added another topology
- * device
- */
- res = kfd_topology_update_sysfs();
- if (!res)
- sys_props.generation_count++;
- else
- pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology.
res=%d\n",
- gpu_id, res);
- }
+ if (!dev)
+ res = kfd_topology_add_device_locked(gpu, gpu_id, &dev);
up_write(&topology_lock);
+ if (res)
+ return res;
dev->gpu_id = gpu_id;
gpu->id = gpu_id;
@@ -2134,8 +2145,7 @@ int kfd_topology_add_device(struct kfd_dev *gpu)
if (!res)
kfd_notify_gpu_change(gpu_id, 1);
-err:
- kfd_destroy_crat_image(crat_image);
+
return res;
}
