static void qedr_pci_set_atomic(struct qedr_dev *dev, struct pci_dev *pdev)
{
int rc = pci_enable_atomic_ops_to_root(pdev,
PCI_EXP_DEVCAP2_ATOMIC_COMP64);
if (rc) {
dev->atomic_cap = IB_ATOMIC_NONE;
DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability disabled\n");
} else {
dev->atomic_cap = IB_ATOMIC_GLOB;
DP_DEBUG(dev, QEDR_MSG_INIT, "Atomic capability enabled\n");
}
}
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);
if (!device_info) {
dev_err(kfd_device, "kgd2kfd_probe failed\n");
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);
if (!kfd)
return NULL;
kfd->kgd = kgd;
kfd->device_info = device_info;
kfd->pdev = pdev;
kfd->init_complete = false;
kfd->kfd2kgd = f2g;
mutex_init(&kfd->doorbell_mutex);
memset(&kfd->doorbell_available_index, 0,
sizeof(kfd->doorbell_available_index));
return kfd;
}
