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gpu: nvgpu: add ctrl device instance ID

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In order to share the TSG across different devices securely, device
instance IDs are to be exchanged for endpoint identification. Add
device instance ID field to gk20a_ctrl_priv which is generated
from gk20a level device instance id value.

Share this ID to userspace via gpu characteristics.

Bug 3677982
JIRA NVGPU-8681

Change-Id: I79d92a81c02272c52e24f5b12c452c8993137037
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2792079
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Scott Long <scottl@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Sagar Kamble
2022-09-26 17:46:58 +05:30
committed by mobile promotions
parent 41c874a2d9
commit 6e2b592ab9
8 changed files with 60 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -85,6 +85,9 @@ struct gk20a_ctrl_priv {
struct gk20a *g;
struct nvgpu_clk_session *clk_session;
struct nvgpu_cdev *cdev;
#ifdef CONFIG_NVGPU_TSG_SHARING
u64 device_instance_id;
#endif
struct nvgpu_list_node list;
struct {
@@ -146,6 +149,18 @@ int gk20a_ctrl_dev_open(struct inode *inode, struct file *filp)
*/
priv->g = g;
#ifdef CONFIG_NVGPU_TSG_SHARING
nvgpu_mutex_acquire(&g->ctrl_dev_id_lock);
nvgpu_assert(g->ctrl_device_instance_id < U64_MAX);
g->ctrl_device_instance_id += 1ULL;
priv->device_instance_id = g->ctrl_device_instance_id;
nvgpu_mutex_release(&g->ctrl_dev_id_lock);
nvgpu_log_info(g, "opened ctrl device: %llx", priv->device_instance_id);
#endif
if (!g->sw_ready) {
err = gk20a_busy(g);
if (err)
@@ -361,7 +376,7 @@ static void nvgpu_set_preemption_mode_flags(struct gk20a *g,
static long gk20a_ctrl_ioctl_gpu_characteristics(
struct gk20a *g, u32 gpu_instance_id, struct nvgpu_gr_config *gr_config,
struct nvgpu_gpu_get_characteristics *request)
struct gk20a_ctrl_priv *priv, struct nvgpu_gpu_get_characteristics *request)
{
struct nvgpu_gpu_characteristics gpu;
long err = 0;
@@ -377,6 +392,10 @@ static long gk20a_ctrl_ioctl_gpu_characteristics(
(void) memset(&gpu, 0, sizeof(gpu));
gpu_instance = &g->mig.gpu_instance[gpu_instance_id];
#ifdef CONFIG_NVGPU_TSG_SHARING
gpu.device_instance_id = priv->device_instance_id;
#endif
gpu.L2_cache_size = g->ops.ltc.determine_L2_size_bytes(g);
gpu.on_board_video_memory_size = 0; /* integrated GPU */
@@ -2416,7 +2435,7 @@ long gk20a_ctrl_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg
#endif /* CONFIG_NVGPU_GRAPHICS */
case NVGPU_GPU_IOCTL_GET_CHARACTERISTICS:
err = gk20a_ctrl_ioctl_gpu_characteristics(g, gpu_instance_id, gr_config,
(struct nvgpu_gpu_get_characteristics *)buf);
priv, (struct nvgpu_gpu_get_characteristics *)buf);
break;
case NVGPU_GPU_IOCTL_PREPARE_COMPRESSIBLE_READ:
err = gk20a_ctrl_prepare_compressible_read(g,