From 9a5e02b5ccf8399908c67cca9ff86c725db60a0d Mon Sep 17 00:00:00 2001 From: Monk Liu Date: Fri, 18 Nov 2016 17:16:36 +0800 Subject: [PATCH] drm/amdgpu:impl gfx9 cond_exec (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit it is needed for virtualization v2: squash in wptr value fix Signed-off-by: Monk Liu Signed-off-by: Xiangliang Yu Reviewed-by: Alex Deucher Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 307342c9d226..a3d4508c32ea 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -3224,6 +3224,31 @@ static void gfx_v9_ring_emit_cntxcntl(struct amdgpu_ring *ring, uint32_t flags) amdgpu_ring_write(ring, 0); } +static unsigned gfx_v9_0_ring_emit_init_cond_exec(struct amdgpu_ring *ring) +{ + unsigned ret; + amdgpu_ring_write(ring, PACKET3(PACKET3_COND_EXEC, 3)); + amdgpu_ring_write(ring, lower_32_bits(ring->cond_exe_gpu_addr)); + amdgpu_ring_write(ring, upper_32_bits(ring->cond_exe_gpu_addr)); + amdgpu_ring_write(ring, 0); /* discard following DWs if *cond_exec_gpu_addr==0 */ + ret = ring->wptr & ring->buf_mask; + amdgpu_ring_write(ring, 0x55aa55aa); /* patch dummy value later */ + return ret; +} + +static void gfx_v9_0_ring_emit_patch_cond_exec(struct amdgpu_ring *ring, unsigned offset) +{ + unsigned cur; + BUG_ON(offset > ring->buf_mask); + BUG_ON(ring->ring[offset] != 0x55aa55aa); + + cur = (ring->wptr & ring->buf_mask) - 1; + if (likely(cur > offset)) + ring->ring[offset] = cur - offset; + else + ring->ring[offset] = (ring->ring_size>>2) - offset + cur; +} + static void gfx_v9_0_ring_emit_rreg(struct amdgpu_ring *ring, uint32_t reg) { struct amdgpu_device *adev = ring->adev; @@ -3575,6 +3600,8 @@ static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_gfx = { .pad_ib = amdgpu_ring_generic_pad_ib, .emit_switch_buffer = gfx_v9_ring_emit_sb, .emit_cntxcntl = gfx_v9_ring_emit_cntxcntl, + .init_cond_exec = gfx_v9_0_ring_emit_init_cond_exec, + .patch_cond_exec = gfx_v9_0_ring_emit_patch_cond_exec, }; static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_compute = { -- 2.20.1