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drm/amdkfd: Support enumerating non-GPU devices 

Modify kfd_topology_enum_kfd_devices(..) function to support non-GPU
nodes. The function returned NULL when it encountered non-GPU (say CPU)
nodes. This caused kfd_ioctl_create_event and kfd_init_apertures to fail
for Intel + Tonga.

kfd_topology_enum_kfd_devices will now parse all the nodes and return
valid kfd_dev for nodes with GPU.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Harish Kasiviswanathan 2017-12-08 23:08:53 -05:00 committed by Oded Gabbay
parent 4f449311e9
commit 6d82eb0ef2
4 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c
View File

@ -300,9 +300,14 @@ int kfd_init_apertures(struct kfd_process *process)
struct kfd_process_device *pdd;
/*Iterating over all devices*/
while ((dev = kfd_topology_enum_kfd_devices(id)) != NULL &&
while (kfd_topology_enum_kfd_devices(id, &dev) == 0 &&
id < NUM_OF_SUPPORTED_GPUS) {
if (!dev) {
id++; /* Skip non GPU devices */
continue;
}
pdd = kfd_create_process_device_data(dev, process);
if (!pdd) {
pr_err("Failed to create process device data\n");

2
drivers/gpu/drm/amd/amdkfd/kfd_pasid.c
View File

@ -59,7 +59,7 @@ unsigned int kfd_pasid_alloc(void)
struct kfd_dev *dev = NULL;
unsigned int i = 0;
while ((dev = kfd_topology_enum_kfd_devices(i)) != NULL) {
while ((kfd_topology_enum_kfd_devices(i, &dev)) == 0) {
if (dev && dev->kfd2kgd) {
kfd2kgd = dev->kfd2kgd;
break;

2
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
View File

@ -670,7 +670,7 @@ int kfd_topology_add_device(struct kfd_dev *gpu);
int kfd_topology_remove_device(struct kfd_dev *gpu);
struct kfd_dev *kfd_device_by_id(uint32_t gpu_id);
struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev);
struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx);
int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev);
/* Interrupts */
int kfd_interrupt_init(struct kfd_dev *dev);

18
drivers/gpu/drm/amd/amdkfd/kfd_topology.c
View File

@ -927,22 +927,26 @@ int kfd_topology_remove_device(struct kfd_dev *gpu)
return res;
}
/*
* When idx is out of bounds, the function will return NULL
/* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
* topology. If GPU device is found @idx, then valid kfd_dev pointer is
* returned through @kdev
* Return - 0: On success (@kdev will be NULL for non GPU nodes)
* -1: If end of list
*/
struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx)
int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
{
struct kfd_topology_device *top_dev;
struct kfd_dev *device = NULL;
uint8_t device_idx = 0;
*kdev = NULL;
down_read(&topology_lock);
list_for_each_entry(top_dev, &topology_device_list, list) {
if (device_idx == idx) {
device = top_dev->gpu;
break;
*kdev = top_dev->gpu;
up_read(&topology_lock);
return 0;
}
device_idx++;
@ -950,7 +954,7 @@ struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx)
up_read(&topology_lock);
return device;
return -1;
}