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| author | Alex Sierra <alex.sierra@amd.com> | 2022-02-23 11:34:51 -0600 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-02-24 17:25:12 -0500 |
| commit | 158a05a0b885f456a86720b9b6b4571943d2e307 (patch) | |
| tree | 1df4f99538ff4019953c1355bafd116ad660fbe8 /drivers/gpu/drm | |
| parent | 0bb319e7a1146e15f1919cfbffe44831c29e8f82 (diff) | |
| download | lwn-158a05a0b885f456a86720b9b6b4571943d2e307.tar.gz lwn-158a05a0b885f456a86720b9b6b4571943d2e307.zip | |
drm/amdgpu: Add use_xgmi_p2p module parameter
This parameter controls xGMI p2p communication, which is enabled by
default. However, it can be disabled by setting it to 0. In case xGMI
p2p is disabled in a dGPU, PCIe p2p interface will be used instead.
This parameter is ignored in GPUs that do not support xGMI
p2p configuration.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 3 |
3 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index bbe9950bf4db..d990ebfd2afc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -211,6 +211,7 @@ extern int amdgpu_mes; extern int amdgpu_noretry; extern int amdgpu_force_asic_type; extern int amdgpu_smartshift_bias; +extern int amdgpu_use_xgmi_p2p; #ifdef CONFIG_HSA_AMD extern int sched_policy; extern bool debug_evictions; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index e18356fff710..312d15d5df95 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -176,6 +176,7 @@ int amdgpu_tmz = -1; /* auto */ int amdgpu_reset_method = -1; /* auto */ int amdgpu_num_kcq = -1; int amdgpu_smartshift_bias; +int amdgpu_use_xgmi_p2p = 1; static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work); @@ -651,6 +652,13 @@ MODULE_PARM_DESC(force_asic_type, "A non negative value used to specify the asic type for all supported GPUs"); module_param_named(force_asic_type, amdgpu_force_asic_type, int, 0444); +/** + * DOC: use_xgmi_p2p (int) + * Enables/disables XGMI P2P interface (0 = disable, 1 = enable). + */ +MODULE_PARM_DESC(use_xgmi_p2p, + "Enable XGMI P2P interface (0 = disable; 1 = enable (default))"); +module_param_named(use_xgmi_p2p, amdgpu_use_xgmi_p2p, int, 0444); #ifdef CONFIG_HSA_AMD diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h index 0afca51c3c0c..095921851fb5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h @@ -66,7 +66,8 @@ uint64_t amdgpu_xgmi_get_relative_phy_addr(struct amdgpu_device *adev, static inline bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev, struct amdgpu_device *bo_adev) { - return (adev != bo_adev && + return (amdgpu_use_xgmi_p2p && + adev != bo_adev && adev->gmc.xgmi.hive_id && adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id); } |