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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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11
drivers/gpu/nvgpu/os/linux/fecs_trace_linux.c
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@@ -310,24 +310,25 @@ static int gk20a_ctxsw_dev_ioctl_poll(struct gk20a_ctxsw_dev *dev)
int gk20a_ctxsw_dev_open(struct inode *inode, struct file *filp)
{
struct nvgpu_os_linux *l;
struct gk20a *g;
struct gk20a_ctxsw_trace *trace;
struct gk20a_ctxsw_dev *dev;
int err;
size_t size;
u32 n;
/* only one VM for now */
const int vmid = 0;
struct nvgpu_cdev *cdev;
l = container_of(inode->i_cdev, struct nvgpu_os_linux, ctxsw.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;
if (!nvgpu_is_enabled(g, NVGPU_SUPPORT_FECS_CTXSW_TRACE)) {
nvgpu_put(&l->g);
nvgpu_put(g);
return -ENODEV;
}