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gpu: nvgpu: split away power node removal

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Presently, gk20a_user_deinit is used to remove all device nodes
including "power" node as well.

Split removal of power node into a separate function
gk20a_power_node_deinit to enable other device removal during the
normal runtime_suspend path to facilitate the fast path for MIG
reconfiguration. Powernode can be removed only during a call to
Rmmod. This also enables separately powering off the device nodes
in the unlikely case of a poweron failure.

Bug 3308828
Jira NVGPU-6920

Change-Id: Ib045a09a992a63c468492a837b273cca41e20f15
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2543014
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Dinesh T <dt@nvidia.com>
Reviewed-by: Lakshmanan M <lm@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Debarshi Dutta
2021-06-11 11:40:07 +05:30
committed by mobile promotions
parent a1d0957a9b
commit 8f9ac1dea9
5 changed files with 63 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/gpu/nvgpu/os/linux/ioctl.h
View File

@@ -21,10 +21,25 @@
struct device;
struct class;
struct nvgpu_class {
struct class *class;
struct nvgpu_list_node list_entry;
struct nvgpu_cdev_class_priv_data *priv_data;
enum nvgpu_mig_gpu_instance_type instance_type;
bool power_node;
};
static inline struct class *nvgpu_class_get_class(struct nvgpu_class *class)
{
return class->class;
}
struct nvgpu_cdev {
struct cdev cdev;
struct device *node;
struct class *class;
struct nvgpu_class *class;
struct nvgpu_list_node list_entry;
};
@@ -43,16 +58,6 @@ struct nvgpu_cdev_class_priv_data {
bool pci;
};
struct nvgpu_class {
struct class *class;
struct nvgpu_list_node list_entry;
struct nvgpu_cdev_class_priv_data *priv_data;
enum nvgpu_mig_gpu_instance_type instance_type;
bool power_node;
};
static inline struct nvgpu_class *
nvgpu_class_from_list_entry(struct nvgpu_list_node *node)
{
@@ -60,9 +65,10 @@ nvgpu_class_from_list_entry(struct nvgpu_list_node *node)
((uintptr_t)node - offsetof(struct nvgpu_class, list_entry));
};
int gk20a_user_init(struct device *dev);
int gk20a_user_nodes_init(struct device *dev);
int gk20a_power_node_init(struct device *dev);
void gk20a_user_deinit(struct device *dev);
void gk20a_user_nodes_deinit(struct device *dev);
void gk20a_power_node_deinit(struct device *dev);
struct gk20a *nvgpu_get_gk20a_from_cdev(struct nvgpu_cdev *cdev);
u32 nvgpu_get_gpu_instance_id_from_cdev(struct gk20a *g, struct nvgpu_cdev *cdev);