diff options
| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2018-11-20 21:00:29 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-12-07 18:13:54 -0500 |
| commit | 1dde0ea95b782425b95455d487cb44991525a1d1 (patch) | |
| tree | 2033a93a0417699fca78f5e42f1a7512e80c5a76 /drivers/gpu/drm/amd/amdkfd/kfd_topology.c | |
| parent | 3704d56e1a64bb0e951815f91149ae7bb726aa76 (diff) | |
drm/amdkfd: Add DMABuf import functionality
This is used for interoperability between ROCm compute and graphics
APIs. It allows importing graphics driver BOs into the ROCm SVM
address space for zero-copy GPU access.
The API is split into two steps (query and import) to allow user mode
to manage the virtual address space allocation for the imported buffer.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_topology.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c index c5ed21ef2462..5f5b2acedbac 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -111,6 +111,24 @@ struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev) return device; } +struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd) +{ + struct kfd_topology_device *top_dev; + struct kfd_dev *device = NULL; + + down_read(&topology_lock); + + list_for_each_entry(top_dev, &topology_device_list, list) + if (top_dev->gpu && top_dev->gpu->kgd == kgd) { + device = top_dev->gpu; + break; + } + + up_read(&topology_lock); + + return device; +} + /* Called with write topology_lock acquired */ static void kfd_release_topology_device(struct kfd_topology_device *dev) { |