diff options
| author | Lijo Lazar <lijo.lazar@amd.com> | 2025-02-06 17:24:51 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-02-27 16:50:04 -0500 |
| commit | 485993e2f1a6bf3d1e8fb5a38c82edd3ae697ad9 (patch) | |
| tree | e9d815afb47bc64233201a5c82a856aefad78e71 /drivers/gpu/drm/amd/amdgpu | |
| parent | 6f16d101dab5ec6e8fc9567769f73ae8baa3fe38 (diff) | |
drm/amdgpu: Add xgmi speed/width related info
Add APIs to initialize XGMI speed, width details and get to max
bandwidth supported. It is assumed that a device only supports same
generation of XGMI links with uniform width.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 23 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 11 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index 59e44d20124f..9c539f26e5fd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -1722,3 +1722,26 @@ bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev, adev->gmc.xgmi.hive_id && adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id); } + +void amdgpu_xgmi_early_init(struct amdgpu_device *adev) +{ + if (!adev->gmc.xgmi.supported) + return; + + switch (amdgpu_ip_version(adev, GC_HWIP, 0)) { + case IP_VERSION(9, 4, 0): + case IP_VERSION(9, 4, 1): + case IP_VERSION(9, 4, 2): + adev->gmc.xgmi.max_speed = XGMI_SPEED_25GT; + adev->gmc.xgmi.max_width = 16; + break; + case IP_VERSION(9, 4, 3): + case IP_VERSION(9, 4, 4): + case IP_VERSION(9, 5, 0): + adev->gmc.xgmi.max_speed = XGMI_SPEED_32GT; + adev->gmc.xgmi.max_width = 16; + break; + default: + break; + } +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h index 1d4e822652a1..32dabba4062f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h @@ -25,6 +25,12 @@ #include <drm/task_barrier.h> #include "amdgpu_ras.h" +enum amdgpu_xgmi_link_speed { + XGMI_SPEED_16GT = 16, + XGMI_SPEED_25GT = 25, + XGMI_SPEED_32GT = 32 +}; + struct amdgpu_hive_info { struct kobject kobj; uint64_t hive_id; @@ -91,6 +97,8 @@ struct amdgpu_xgmi { struct ras_common_if *ras_if; bool connected_to_cpu; struct amdgpu_xgmi_ras *ras; + enum amdgpu_xgmi_link_speed max_speed; + uint8_t max_width; }; struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev); @@ -118,4 +126,7 @@ int amdgpu_xgmi_request_nps_change(struct amdgpu_device *adev, int amdgpu_get_xgmi_link_status(struct amdgpu_device *adev, int global_link_num); +void amdgpu_xgmi_early_init(struct amdgpu_device *adev); +uint32_t amdgpu_xgmi_get_max_bandwidth(struct amdgpu_device *adev); + #endif |