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drm/amdkfd: Try to enable atomics for all GPUs 

Report failure to enable atomics only on GPUs that require them.
This allows GPUs that don't require atomics to function, but can
benefit if they are available. This is the case for Vega10, which
doesn't use atomics for basic functioning of the MEC, AQL and HWS
microcode. So it can work without atomics. But shader programs can
still use atomic instructions on systems that support PCIe atomics.

Signed-off-by: welu <Wei.Lu2@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:
welu 2018-04-10 17:33:17 -04:00 committed by Oded Gabbay
parent 3e76c2399b
commit 6106dce955
1 changed files with 13 additions and 14 deletions
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27
drivers/gpu/drm/amd/amdkfd/kfd_device.c
View File

@ -290,7 +290,7 @@ struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
struct pci_dev *pdev, const struct kfd2kgd_calls *f2g)
{
struct kfd_dev *kfd;
int ret;
const struct kfd_device_info *device_info =
lookup_device_info(pdev->device);
@ -299,19 +299,18 @@ struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
return NULL;
}
if (device_info->needs_pci_atomics) {
/* Allow BIF to recode atomics to PCIe 3.0
* AtomicOps. 32 and 64-bit requests are possible and
* must be supported.
*/
if (pci_enable_atomic_ops_to_root(pdev,
PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
PCI_EXP_DEVCAP2_ATOMIC_COMP64) < 0) {
dev_info(kfd_device,
"skipped device %x:%x, PCI rejects atomics",
pdev->vendor, pdev->device);
return NULL;
}
/* Allow BIF to recode atomics to PCIe 3.0 AtomicOps.
* 32 and 64-bit requests are possible and must be
* supported.
*/
ret = pci_enable_atomic_ops_to_root(pdev,
PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
PCI_EXP_DEVCAP2_ATOMIC_COMP64);
if (device_info->needs_pci_atomics && ret < 0) {
dev_info(kfd_device,
"skipped device %x:%x, PCI rejects atomics\n",
pdev->vendor, pdev->device);
return NULL;
}
kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);