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gpu: nvgpu: implement VEID alloc/free

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Implement the ioctls NVGPU_TSG_IOCTL_CREATE_SUBCONTEXT and
NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT. These will allocate and
free the VEID numbers.

Address space association with the VEIDs is verified to
ensure that channels association with VEIDs and address
space remains consistent.

Bug 3677982
JIRA NVGPU-8681

Change-Id: I2d913baf61a6bdeec412c58270c0024b80ca15c6
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2766765
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Sagar Kamble
2022-08-23 07:30:40 +00:00
committed by mobile promotions
parent 9233886943
commit d1b28712b6
8 changed files with 492 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
drivers/gpu/nvgpu/os/linux/ioctl_tsg.c
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@@ -40,6 +40,7 @@
#include "platform_gk20a.h"
#include "ioctl_tsg.h"
#include "ioctl_as.h"
#include "ioctl_channel.h"
#include "ioctl_nvs.h"
#include "ioctl.h"
@@ -83,6 +84,18 @@ static int nvgpu_tsg_bind_channel_fd(struct nvgpu_tsg *tsg, int ch_fd)
if (!ch)
return -EINVAL;
err = nvgpu_tsg_create_sync_subcontext_internal(ch->g, tsg, ch);
if (err != 0) {
nvgpu_err(ch->g, "sync subctx created failed %d", err);
return err;
}
err = nvgpu_tsg_validate_ch_subctx_vm(ch->g, tsg, ch);
if (err != 0) {
nvgpu_err(ch->g, "channel/subctx VM mismatch");
return err;
}
err = nvgpu_tsg_bind_channel(tsg, ch);
nvgpu_channel_put(ch);
@@ -137,6 +150,18 @@ static int gk20a_tsg_ioctl_bind_channel_ex(struct gk20a *g,
if (ch->subctx_id > CHANNEL_INFO_VEID0)
ch->runqueue_sel = 1;
err = nvgpu_tsg_create_sync_subcontext_internal(g, tsg, ch);
if (err != 0) {
nvgpu_err(ch->g, "sync subctx created failed %d", err);
goto ch_put;
}
err = nvgpu_tsg_validate_ch_subctx_vm(g, tsg, ch);
if (err != 0) {
nvgpu_err(g, "channel/subctx VM mismatch");
goto ch_put;
}
err = nvgpu_tsg_bind_channel(tsg, ch);
ch_put:
nvgpu_channel_put(ch);
@@ -749,6 +774,70 @@ static int nvgpu_gpu_ioctl_set_l2_sector_promotion(struct gk20a *g,
return err;
}
static int nvgpu_tsg_ioctl_create_subcontext(struct gk20a *g,
u32 gpu_instance_id, struct nvgpu_tsg *tsg,
struct nvgpu_tsg_create_subcontext_args *args)
{
u32 max_subctx_count;
struct vm_gk20a *vm;
u32 veid;
int err;
if (!nvgpu_is_enabled(g, NVGPU_SUPPORT_TSG_SUBCONTEXTS)) {
return 0;
}
if (args->type != NVGPU_TSG_SUBCONTEXT_TYPE_SYNC &&
args->type != NVGPU_TSG_SUBCONTEXT_TYPE_ASYNC) {
nvgpu_err(g, "Invalid subcontext type %u", args->type);
return -EINVAL;
}
vm = nvgpu_vm_get_from_file(args->as_fd);
if (vm == NULL) {
nvgpu_err(g, "Invalid VM (fd = %d) specified for subcontext",
args->as_fd);
return -EINVAL;
}
max_subctx_count = nvgpu_grmgr_get_gpu_instance_max_veid_count(g, gpu_instance_id);
err = nvgpu_tsg_create_subcontext(g, tsg, args->type, vm,
max_subctx_count, &veid);
if (err != 0) {
nvgpu_err(g, "Create subcontext failed %d", err);
nvgpu_vm_put(vm);
return err;
}
nvgpu_vm_put(vm);
args->veid = veid;
return 0;
}
static int nvgpu_tsg_ioctl_delete_subcontext(struct gk20a *g,
u32 gpu_instance_id, struct nvgpu_tsg *tsg,
struct nvgpu_tsg_delete_subcontext_args *args)
{
u32 max_subctx_count;
int err;
if (!nvgpu_is_enabled(g, NVGPU_SUPPORT_TSG_SUBCONTEXTS)) {
return 0;
}
max_subctx_count = nvgpu_grmgr_get_gpu_instance_max_veid_count(g, gpu_instance_id);
err = nvgpu_tsg_delete_subcontext(g, tsg, max_subctx_count, args->veid);
if (err != 0) {
nvgpu_err(g, "Delete subcontext failed %d", err);
}
return err;
}
long nvgpu_ioctl_tsg_dev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
@@ -952,6 +1041,18 @@ long nvgpu_ioctl_tsg_dev_ioctl(struct file *filp, unsigned int cmd,
break;
}
case NVGPU_TSG_IOCTL_CREATE_SUBCONTEXT:
{
err = nvgpu_tsg_ioctl_create_subcontext(g, gpu_instance_id, tsg,
(struct nvgpu_tsg_create_subcontext_args *)buf);
break;
}
case NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT:
{
err = nvgpu_tsg_ioctl_delete_subcontext(g, gpu_instance_id, tsg,
(struct nvgpu_tsg_delete_subcontext_args *)buf);
break;
}
default:
nvgpu_err(g, "unrecognized tsg gpu ioctl cmd: 0x%x",
cmd);