drm/amdkfd: Put ASIC revision into HSA capability

In order to surface the ASIC revision to user level, we want
to put it into the HSA topology. This can be because different
ASIC revisions may require user-level software to do different
things (e.g. patch code for things that are changed in later
hardware revisions).

The ASIC revision from the hardware is maximum of 4 bits at this
time, so put it into 4 of the open bits in the HSA capability.
Then user-level software can use this capability information to
know -- for each ASIC -- what revision-based things must be done.
Signed-off-by: Joseph Greathouse <Joseph.Greathouse@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c

@@ -564,6 +564,13 @@ uint32_t amdgpu_amdkfd_get_num_gws(struct kgd_dev *kgd)
 	return adev->gds.gws_size;
 }
 
+uint32_t amdgpu_amdkfd_get_asic_rev_id(struct kgd_dev *kgd)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
+
+	return adev->rev_id;
+}
+
 int amdgpu_amdkfd_submit_ib(struct kgd_dev *kgd, enum kgd_engine_type engine,
 				uint32_t vmid, uint64_t gpu_addr,
 				uint32_t *ib_cmd, uint32_t ib_len)

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h

@@ -175,6 +175,7 @@ uint64_t amdgpu_amdkfd_get_hive_id(struct kgd_dev *kgd);
 uint64_t amdgpu_amdkfd_get_unique_id(struct kgd_dev *kgd);
 uint64_t amdgpu_amdkfd_get_mmio_remap_phys_addr(struct kgd_dev *kgd);
 uint32_t amdgpu_amdkfd_get_num_gws(struct kgd_dev *kgd);
+uint32_t amdgpu_amdkfd_get_asic_rev_id(struct kgd_dev *kgd);
 uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *src);
 
 /* Read user wptr from a specified user address space with page fault

drivers/gpu/drm/amd/amdkfd/kfd_topology.c

@@ -1301,6 +1301,10 @@ int kfd_topology_add_device(struct kfd_dev *gpu)
 
 	dev->node_props.vendor_id = gpu->pdev->vendor;
 	dev->node_props.device_id = gpu->pdev->device;
+	dev->node_props.capability |=
+		((amdgpu_amdkfd_get_asic_rev_id(dev->gpu->kgd) <<
+			HSA_CAP_ASIC_REVISION_SHIFT) &
+			HSA_CAP_ASIC_REVISION_MASK);
 	dev->node_props.location_id = pci_dev_id(gpu->pdev);
 	dev->node_props.max_engine_clk_fcompute =
 		amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);

drivers/gpu/drm/amd/amdkfd/kfd_topology.h

@@ -41,7 +41,6 @@
 #define HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT	8
 #define HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK	0x00003000
 #define HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT	12
-#define HSA_CAP_RESERVED			0xffffc000
 
 #define HSA_CAP_DOORBELL_TYPE_PRE_1_0		0x0
 #define HSA_CAP_DOORBELL_TYPE_1_0		0x1
@@ -51,6 +50,10 @@
 #define HSA_CAP_SRAM_EDCSUPPORTED		0x00080000
 #define HSA_CAP_MEM_EDCSUPPORTED		0x00100000
 #define HSA_CAP_RASEVENTNOTIFY			0x00200000
+#define HSA_CAP_ASIC_REVISION_MASK		0x03c00000
+#define HSA_CAP_ASIC_REVISION_SHIFT		22
+
+#define HSA_CAP_RESERVED			0xfc078000
 
 struct kfd_node_properties {
 	uint64_t hive_id;