Commit 78bd101c authored by Hawking Zhang's avatar Hawking Zhang Committed by Alex Deucher
Browse files

drm/amdgpu: add a helper function to decode iv 



since from soc15, all the chips share the same
iv format. create a common helper to decode iv

Signed-off-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Acked-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarDennis Li <Dennis.Li@amd.com>
Reviewed-by: default avatarFeifei Xu <Feifei.Xu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 2d2fbf68

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

+43 −0
Original line number Diff line number Diff line
@@ -205,3 +205,46 @@ int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih) 
	return IRQ_HANDLED;

}



/**

 * amdgpu_ih_decode_iv_helper - decode an interrupt vector

 *

 * @adev: amdgpu_device pointer

 *

 * Decodes the interrupt vector at the current rptr

 * position and also advance the position for for Vega10

 * and later GPUs.

 */

void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,

				struct amdgpu_ih_ring *ih,

				struct amdgpu_iv_entry *entry)

{

	/* wptr/rptr are in bytes! */

	u32 ring_index = ih->rptr >> 2;

	uint32_t dw[8];



	dw[0] = le32_to_cpu(ih->ring[ring_index + 0]);

	dw[1] = le32_to_cpu(ih->ring[ring_index + 1]);

	dw[2] = le32_to_cpu(ih->ring[ring_index + 2]);

	dw[3] = le32_to_cpu(ih->ring[ring_index + 3]);

	dw[4] = le32_to_cpu(ih->ring[ring_index + 4]);

	dw[5] = le32_to_cpu(ih->ring[ring_index + 5]);

	dw[6] = le32_to_cpu(ih->ring[ring_index + 6]);

	dw[7] = le32_to_cpu(ih->ring[ring_index + 7]);



	entry->client_id = dw[0] & 0xff;

	entry->src_id = (dw[0] >> 8) & 0xff;

	entry->ring_id = (dw[0] >> 16) & 0xff;

	entry->vmid = (dw[0] >> 24) & 0xf;

	entry->vmid_src = (dw[0] >> 31);

	entry->timestamp = dw[1] | ((u64)(dw[2] & 0xffff) << 32);

	entry->timestamp_src = dw[2] >> 31;

	entry->pasid = dw[3] & 0xffff;

	entry->pasid_src = dw[3] >> 31;

	entry->src_data[0] = dw[4];

	entry->src_data[1] = dw[5];

	entry->src_data[2] = dw[6];

	entry->src_data[3] = dw[7];



	/* wptr/rptr are in bytes! */

	ih->rptr += 32;

}

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

+3 −1
Original line number Diff line number Diff line
@@ -88,5 +88,7 @@ void amdgpu_ih_ring_fini(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih); 
void amdgpu_ih_ring_write(struct amdgpu_ih_ring *ih, const uint32_t *iv,

			  unsigned int num_dw);

int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih);



void amdgpu_ih_decode_iv_helper(struct amdgpu_device *adev,

				struct amdgpu_ih_ring *ih,

				struct amdgpu_iv_entry *entry);

#endif