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gpu: nvgpu: add platform control for gc off

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The GC-OFF feature shall be available only for selective
dGPUs like Volta, etc. To enable this, add a platform flag
to control GC-OFF feature for a given dGPU.

If GC-OFF is not enabled for a dGPU, EPERM error will be
returned by kernel interfaces.

JIRA NVGPU-1100

Change-Id: Ic9e4492b2bb8916d520e78ecb6a500ccd349b70c
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1923249
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nitin Kumbhar
2018-10-10 09:46:41 +05:30
committed by mobile promotions
parent 4fcdc2771f
commit 7cec4ba326
3 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/nvgpu/os/linux/pci.c
View File

@@ -189,6 +189,7 @@ static struct gk20a_platform nvgpu_pci_device[] = {
/* power management configuration */
.railgate_delay_init = 500,
.can_railgate_init = false,
.can_pci_gc_off = true,
.can_elpg_init = false,
.enable_elpg = false,
.enable_elcg = false,
@@ -263,6 +264,7 @@ static struct gk20a_platform nvgpu_pci_device[] = {
/* power management configuration */
.railgate_delay_init = 500,
.can_railgate_init = false,
.can_pci_gc_off = true,
.can_elpg_init = false,
.enable_elpg = false,
.enable_elcg = false,

15
drivers/gpu/nvgpu/os/linux/pci_power.c
View File

@@ -52,6 +52,7 @@ struct nvgpu_pci_power {
char pci_dev_name[PCI_DEV_NAME_MAX];
void *pci_cookie;
struct pci_power_stats stats;
bool can_pci_gc_off;
};
static struct list_head nvgpu_pci_power_devs =
@@ -70,6 +71,7 @@ static struct nvgpu_pci_power *nvgpu_pci_get_pci_power(const char *dev_name)
int nvgpu_pci_add_pci_power(struct pci_dev *pdev)
{
struct gk20a_platform *platform;
struct nvgpu_pci_power *pp;
if (!pdev)
@@ -90,6 +92,9 @@ int nvgpu_pci_add_pci_power(struct pci_dev *pdev)
strlcpy(pp->pci_dev_name,
dev_name(&pdev->dev), PCI_DEV_NAME_MAX);
platform = pci_get_drvdata(pdev);
pp->can_pci_gc_off = platform->can_pci_gc_off;
list_add(&pp->list, &nvgpu_pci_power_devs);
return 0;
@@ -440,6 +445,11 @@ static int nvgpu_pci_gpu_power_on(char *dev_name)
return -ENODEV;
}
if (pp->can_pci_gc_off == false) {
pr_err("nvgpu: gc-off not enabled for pdev: %s\n", dev_name);
return -EPERM;
}
time_start = ktime_get();
nvgpu_mutex_acquire(&pp->mutex);
@@ -504,6 +514,11 @@ static int nvgpu_pci_gpu_power_off(char *dev_name)
return -ENODEV;
}
if (pp->can_pci_gc_off == false) {
pr_err("nvgpu: gc-off not enabled for pdev: %s\n", dev_name);
return -EPERM;
}
time_start = ktime_get();
nvgpu_mutex_acquire(&pp->mutex);

3
drivers/gpu/nvgpu/os/linux/platform_gk20a.h
View File

@@ -59,6 +59,9 @@ struct gk20a_platform {
/* Should be populated at probe. */
bool can_railgate_init;
/* controls gc off feature for pci gpu */
bool can_pci_gc_off;
/* Should be populated at probe. */
bool can_tpc_powergate;