drm/amdgpu: Enable SDMA context switching for CIK (763dbbfa) · Commits · 戴 / test

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

+30 −0

Original line number	Diff line number	Diff line
		@@ -341,6 +341,33 @@ static void cik_sdma_rlc_stop(struct amdgpu_device *adev)
		/* XXX todo */
		}

		/**
		* cik_ctx_switch_enable - stop the async dma engines context switch
		*
		* @adev: amdgpu_device pointer
		* @enable: enable/disable the DMA MEs context switch.
		*
		* Halt or unhalt the async dma engines context switch (VI).
		*/
		static void cik_ctx_switch_enable(struct amdgpu_device *adev, bool enable)
		{
		u32 f32_cntl;
		int i;

		for (i = 0; i < adev->sdma.num_instances; i++) {
		f32_cntl = RREG32(mmSDMA0_CNTL + sdma_offsets[i]);
		if (enable) {
		f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
		AUTO_CTXSW_ENABLE, 1);
		} else {
		f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL,
		AUTO_CTXSW_ENABLE, 0);
		}

		WREG32(mmSDMA0_CNTL + sdma_offsets[i], f32_cntl);
		}
		}

		/**
		* cik_sdma_enable - stop the async dma engines
		*
		@@ -537,6 +564,8 @@ static int cik_sdma_start(struct amdgpu_device *adev)

		/* halt the engine before programing */
		cik_sdma_enable(adev, false);
		/* enable sdma ring preemption */
		cik_ctx_switch_enable(adev, true);

		/* start the gfx rings and rlc compute queues */
		r = cik_sdma_gfx_resume(adev);
		@@ -984,6 +1013,7 @@ static int cik_sdma_hw_fini(void *handle)
		{
		struct amdgpu_device adev = (struct amdgpu_device )handle;

		cik_ctx_switch_enable(adev, false);
		cik_sdma_enable(adev, false);

		return 0;