mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 01:37:59 +07:00
powerpc/powernv/npu: Add release_ownership hook
In order to make ATS work and translate addresses for arbitrary LPID and PID, we need to program an NPU with LPID and allow PID wildcard matching with a specific MSR mask. This implements a helper to assign a GPU to LPAR and program the NPU with a wildcard for PID and a helper to do clean-up. The helper takes MSR (only DR/HV/PR/SF bits are allowed) to program them into NPU2 for ATS checkout requests support. This exports pnv_npu2_unmap_lpar_dev() as following patches will use it from the VFIO driver. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
parent
0bd971676e
commit
1b785611e1
@ -299,6 +299,7 @@ static void pnv_npu_take_ownership(struct iommu_table_group *table_group)
|
||||
table_group);
|
||||
struct pnv_phb *phb = npe->phb;
|
||||
int64_t rc;
|
||||
struct pci_dev *gpdev = NULL;
|
||||
|
||||
/*
|
||||
* Note: NPU has just a single TVE in the hardware which means that
|
||||
@ -320,12 +321,28 @@ static void pnv_npu_take_ownership(struct iommu_table_group *table_group)
|
||||
return;
|
||||
}
|
||||
pnv_pci_ioda2_tce_invalidate_entire(npe->phb, false);
|
||||
|
||||
get_gpu_pci_dev_and_pe(npe, &gpdev);
|
||||
if (gpdev)
|
||||
pnv_npu2_unmap_lpar_dev(gpdev);
|
||||
}
|
||||
|
||||
static void pnv_npu_release_ownership(struct iommu_table_group *table_group)
|
||||
{
|
||||
struct pnv_ioda_pe *npe = container_of(table_group, struct pnv_ioda_pe,
|
||||
table_group);
|
||||
struct pci_dev *gpdev = NULL;
|
||||
|
||||
get_gpu_pci_dev_and_pe(npe, &gpdev);
|
||||
if (gpdev)
|
||||
pnv_npu2_map_lpar_dev(gpdev, 0, MSR_DR | MSR_PR | MSR_HV);
|
||||
}
|
||||
|
||||
static struct iommu_table_group_ops pnv_pci_npu_ops = {
|
||||
.set_window = pnv_npu_set_window,
|
||||
.unset_window = pnv_npu_unset_window,
|
||||
.take_ownership = pnv_npu_take_ownership,
|
||||
.release_ownership = pnv_npu_release_ownership,
|
||||
};
|
||||
#endif /* !CONFIG_IOMMU_API */
|
||||
|
||||
@ -1236,3 +1253,37 @@ void pnv_npu2_map_lpar(struct pnv_ioda_pe *gpe, unsigned long msr)
|
||||
list_for_each_entry(gpdev, &gpe->pbus->devices, bus_list)
|
||||
pnv_npu2_map_lpar_dev(gpdev, 0, msr);
|
||||
}
|
||||
|
||||
int pnv_npu2_unmap_lpar_dev(struct pci_dev *gpdev)
|
||||
{
|
||||
int ret;
|
||||
struct pci_dev *npdev = pnv_pci_get_npu_dev(gpdev, 0);
|
||||
struct pci_controller *hose;
|
||||
struct pnv_phb *nphb;
|
||||
|
||||
if (!npdev)
|
||||
return -ENODEV;
|
||||
|
||||
hose = pci_bus_to_host(npdev->bus);
|
||||
nphb = hose->private_data;
|
||||
|
||||
dev_dbg(&gpdev->dev, "destroy context opalid=%llu\n",
|
||||
nphb->opal_id);
|
||||
ret = opal_npu_destroy_context(nphb->opal_id, 0/*__unused*/,
|
||||
PCI_DEVID(gpdev->bus->number, gpdev->devfn));
|
||||
if (ret < 0) {
|
||||
dev_err(&gpdev->dev, "Failed to destroy context: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Set LPID to 0 anyway, just to be safe */
|
||||
dev_dbg(&gpdev->dev, "Map LPAR opalid=%llu lparid=0\n", nphb->opal_id);
|
||||
ret = opal_npu_map_lpar(nphb->opal_id,
|
||||
PCI_DEVID(gpdev->bus->number, gpdev->devfn), 0 /*LPID*/,
|
||||
0 /* LPCR bits */);
|
||||
if (ret)
|
||||
dev_err(&gpdev->dev, "Error %d mapping device to LPAR\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(pnv_npu2_unmap_lpar_dev);
|
||||
|
Loading…
Reference in New Issue
Block a user