drm/amdkfd: Add spatial partitioning support in KFD

This patch introduces multi-partition support in KFD.
This patch includes:
- Support for maximum 8 spatial partitions in KFD.
- Initialize one HIQ per partition.
- Management of VMID range depending on partition mode.
- Management of doorbell aperture space between all
  partitions.
- Each partition does its own queue management, interrupt
  handling, SMI event reporting.
- IOMMU, if enabled with multiple partitions, will only work
  on first partition.
- SPM is only supported on the first partition.
- Currently, there is no support for resetting individual
  partitions. All partitions will reset together.

Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Tested-by: Amber Lin <Amber.Lin@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 06a11186d947..94af37df3ed2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -555,7 +555,8 @@ static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
 				      dev->gpu->kfd->sdma_fw_version);
 		sysfs_show_64bit_prop(buffer, offs, "unique_id",
 				      dev->gpu->adev->unique_id);
-
+		sysfs_show_32bit_prop(buffer, offs, "num_xcc",
+				      dev->gpu->num_xcc_per_node);
 	}
 
 	return sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_ccompute",
@@ -1160,7 +1161,7 @@ void kfd_topology_shutdown(void)
 static uint32_t kfd_generate_gpu_id(struct kfd_node *gpu)
 {
 	uint32_t hashout;
-	uint32_t buf[7];
+	uint32_t buf[8];
 	uint64_t local_mem_size;
 	int i;
 
@@ -1177,8 +1178,9 @@ static uint32_t kfd_generate_gpu_id(struct kfd_node *gpu)
 	buf[4] = gpu->adev->pdev->bus->number;
 	buf[5] = lower_32_bits(local_mem_size);
 	buf[6] = upper_32_bits(local_mem_size);
+	buf[7] = gpu->start_xcc_id | (gpu->num_xcc_per_node << 16);
 
-	for (i = 0, hashout = 0; i < 7; i++)
+	for (i = 0, hashout = 0; i < 8; i++)
 		hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
 
 	return hashout;