diff options
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 73 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c | 2 |
3 files changed, 85 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c index 174badca27e7..fe39198307ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c @@ -460,3 +460,76 @@ void amdgpu_sdma_sysfs_reset_mask_fini(struct amdgpu_device *adev) device_remove_file(adev->dev, &dev_attr_sdma_reset_mask); } } + +/** + * amdgpu_sdma_register_on_reset_callbacks - Register SDMA reset callbacks + * @funcs: Pointer to the callback structure containing pre_reset and post_reset functions + * + * This function allows KFD and AMDGPU to register their own callbacks for handling + * pre-reset and post-reset operations for engine reset. These are needed because engine + * reset will stop all queues on that engine. + */ +void amdgpu_sdma_register_on_reset_callbacks(struct amdgpu_device *adev, struct sdma_on_reset_funcs *funcs) +{ + if (!funcs) + return; + + /* Initialize the list node in the callback structure */ + INIT_LIST_HEAD(&funcs->list); + + /* Add the callback structure to the global list */ + list_add_tail(&funcs->list, &adev->sdma.reset_callback_list); +} + +/** + * amdgpu_sdma_reset_engine - Reset a specific SDMA engine + * @adev: Pointer to the AMDGPU device + * @instance_id: ID of the SDMA engine instance to reset + * + * This function performs the following steps: + * 1. Calls all registered pre_reset callbacks to allow KFD and AMDGPU to save their state. + * 2. Resets the specified SDMA engine instance. + * 3. Calls all registered post_reset callbacks to allow KFD and AMDGPU to restore their state. + * + * Returns: 0 on success, or a negative error code on failure. + */ +int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id) +{ + struct sdma_on_reset_funcs *funcs; + int ret; + + /* Invoke all registered pre_reset callbacks */ + list_for_each_entry(funcs, &adev->sdma.reset_callback_list, list) { + if (funcs->pre_reset) { + ret = funcs->pre_reset(adev, instance_id); + if (ret) { + dev_err(adev->dev, + "beforeReset callback failed for instance %u: %d\n", + instance_id, ret); + return ret; + } + } + } + + /* Perform the SDMA reset for the specified instance */ + ret = amdgpu_dpm_reset_sdma(adev, 1 << instance_id); + if (ret) { + dev_err(adev->dev, "Failed to reset SDMA instance %u\n", instance_id); + return ret; + } + + /* Invoke all registered post_reset callbacks */ + list_for_each_entry(funcs, &adev->sdma.reset_callback_list, list) { + if (funcs->post_reset) { + ret = funcs->post_reset(adev, instance_id); + if (ret) { + dev_err(adev->dev, + "afterReset callback failed for instance %u: %d\n", + instance_id, ret); + return ret; + } + } + } + + return 0; +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h index 5f60736051d1..f91d75848557 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h @@ -98,6 +98,13 @@ struct amdgpu_sdma_ras { struct amdgpu_ras_block_object ras_block; }; +struct sdma_on_reset_funcs { + int (*pre_reset)(struct amdgpu_device *adev, uint32_t instance_id); + int (*post_reset)(struct amdgpu_device *adev, uint32_t instance_id); + /* Linked list node to store this structure in a list; */ + struct list_head list; +}; + struct amdgpu_sdma { struct amdgpu_sdma_instance instance[AMDGPU_MAX_SDMA_INSTANCES]; struct amdgpu_irq_src trap_irq; @@ -118,6 +125,7 @@ struct amdgpu_sdma { struct amdgpu_sdma_ras *ras; uint32_t *ip_dump; uint32_t supported_reset; + struct list_head reset_callback_list; }; /* @@ -157,6 +165,9 @@ struct amdgpu_buffer_funcs { uint32_t byte_count); }; +void amdgpu_sdma_register_on_reset_callbacks(struct amdgpu_device *adev, struct sdma_on_reset_funcs *funcs); +int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id); + #define amdgpu_emit_copy_buffer(adev, ib, s, d, b, t) (adev)->mman.buffer_funcs->emit_copy_buffer((ib), (s), (d), (b), (t)) #define amdgpu_emit_fill_buffer(adev, ib, s, d, b) (adev)->mman.buffer_funcs->emit_fill_buffer((ib), (s), (d), (b)) diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c index 9925b183c07f..aab9e9fe0cb8 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c @@ -1477,7 +1477,7 @@ static int sdma_v4_4_2_sw_init(struct amdgpu_ip_block *ip_block) r = amdgpu_sdma_sysfs_reset_mask_init(adev); if (r) return r; - + INIT_LIST_HEAD(&adev->sdma.reset_callback_list); return r; } |