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gpu: nvgpu: track dev nodes using dynamic linked list

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Remove static dev node meta data from struct nvgpu_os_linux and replace
it by a dynamic list. Struct nvgpu_os_linux will only keep track of list
head and number of entries.

Add new structure nvgpu_cdev to store meta data of each dev node and
create/setup it dynamically in gk20a_user_init(). Once done, add the new
node under list head maintained in nvgpu_os_linux.

Add a static list dev_node_list[] that contains list of dev node names
and file operations. This static list is used to create nvgpu_cdev data
structures and to register new device nodes.

Update all dev node open file operations (e.g. gk20a_as_dev_open()) to
extract struct gk20a pointer from device pointer of dev node.
gk20a device is the parent of dev node device.

Jira NVGPU-5648

Change-Id: If070c3428afd6215e45b4919335d9f43e04c36f9
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2428500
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Deepak Nibade
2020-10-14 15:55:54 +05:30
committed by Alex Waterman
parent 9082bcf3bd
commit a3e39c685d
10 changed files with 134 additions and 225 deletions
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9
drivers/gpu/nvgpu/os/linux/sched.c
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@@ -28,6 +28,7 @@
#include <nvgpu/gr/ctx.h>
#include <nvgpu/nvgpu_init.h>
#include "platform_gk20a.h"
#include "sched.h"
#include "os_linux.h"
#include "ioctl_tsg.h"
@@ -387,13 +388,15 @@ static int gk20a_sched_dev_ioctl_put_tsg(struct gk20a *g,
int gk20a_sched_dev_open(struct inode *inode, struct file *filp)
{
struct nvgpu_os_linux *l = container_of(inode->i_cdev,
struct nvgpu_os_linux, sched.cdev);
struct gk20a *g;
struct nvgpu_sched_ctrl *sched;
int err = 0;
struct nvgpu_cdev *cdev;
g = nvgpu_get(&l->g);
cdev = container_of(inode->i_cdev, struct nvgpu_cdev, cdev);
g = get_gk20a(cdev->node->parent);
g = nvgpu_get(g);
if (!g)
return -ENODEV;
sched = &g->sched_ctrl;