From: Monk Liu Date: Thu, 14 Jan 2016 10:08:16 +0000 (+0800) Subject: drm/amdgpu: support cond exec X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=128cff1af68689cf4d85d3ba948c86a194dee30f;p=linux-beck.git drm/amdgpu: support cond exec This adds the groundwork for conditional execution on SDMA which is necessary for preemption. Signed-off-by: Monk Liu Reviewed-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 2c2f2349dd82..49adb451c3bc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -788,6 +788,9 @@ struct amdgpu_ring { struct amdgpu_ctx *current_ctx; enum amdgpu_ring_type type; char name[16]; + unsigned cond_exe_offs; + u64 cond_exe_gpu_addr; + volatile u32 *cond_exe_cpu_addr; }; /* diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index 8443cea6821a..a15d690d9089 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -160,6 +160,9 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, amdgpu_ring_emit_hdp_flush(ring); } + /* always set cond_exec_polling to CONTINUE */ + *ring->cond_exe_cpu_addr = 1; + old_ctx = ring->current_ctx; for (i = 0; i < num_ibs; ++i) { ib = &ibs[i]; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 972eed2ef787..dd79243d0a37 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -267,6 +267,15 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring, } ring->next_rptr_gpu_addr = adev->wb.gpu_addr + (ring->next_rptr_offs * 4); ring->next_rptr_cpu_addr = &adev->wb.wb[ring->next_rptr_offs]; + + r = amdgpu_wb_get(adev, &ring->cond_exe_offs); + if (r) { + dev_err(adev->dev, "(%d) ring cond_exec_polling wb alloc failed\n", r); + return r; + } + ring->cond_exe_gpu_addr = adev->wb.gpu_addr + (ring->cond_exe_offs * 4); + ring->cond_exe_cpu_addr = &adev->wb.wb[ring->cond_exe_offs]; + spin_lock_init(&ring->fence_lock); r = amdgpu_fence_driver_start_ring(ring, irq_src, irq_type); if (r) {