Anyone review this patch ? This patch could fix tessellation bug when shadowing enabled, we should always insert vgt_flush when there is a context switch BR Monk -----é?®ä»¶å??件----- å??件人: Monk Liu [mailto:Monk.Liu at amd.com] å??é??æ?¶é?´: Friday, November 11, 2016 6:32 PM æ?¶ä»¶äºº: amd-gfx at freedesktop.org æ??é??: Liu, Monk 主é¢?: [PATCH] drm/amdgpu:impl vgt_flush for VI when hardware shadowing enabled, tesselation will trigger vm fault, the root cause is because VGT_FLUSH not introduced in kmd. this could fix tesselation crash issue. Change-Id: I77d87d93ce6580e559e734fb41d97ee8c59d245b Signed-off-by: Monk Liu <Monk.Liu at amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 5 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 + drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 13 +++++++++++++ 4 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 15015bc..f46e96b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1630,6 +1630,7 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring) #define amdgpu_ring_emit_fence(r, addr, seq, flags) (r)->funcs->emit_fence((r), (addr), (seq), (flags)) #define amdgpu_ring_emit_gds_switch(r, v, db, ds, wb, ws, ab, as) (r)->funcs->emit_gds_switch((r), (v), (db), (ds), (wb), (ws), (ab), (as)) #define amdgpu_ring_emit_hdp_flush(r) (r)->funcs->emit_hdp_flush((r)) +#define amdgpu_ring_emit_vgt_flush(r) (r)->funcs->emit_vgt_flush((r)) #define amdgpu_ring_emit_hdp_invalidate(r) (r)->funcs->emit_hdp_invalidate((r)) #define amdgpu_ring_emit_switch_buffer(r) (r)->funcs->emit_switch_buffer((r)) #define amdgpu_ring_emit_cntxcntl(r, d) (r)->funcs->emit_cntxcntl((r), (d)) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index acf48de..c039890 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -175,11 +175,14 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, if (ring->funcs->emit_hdp_flush) amdgpu_ring_emit_hdp_flush(ring); + need_ctx_switch = ring->current_ctx != fence_ctx; + if (ring->funcs->emit_vgt_flush && need_ctx_switch) + amdgpu_ring_emit_vgt_flush(ring); + /* always set cond_exec_polling to CONTINUE */ *ring->cond_exe_cpu_addr = 1; skip_preamble = ring->current_ctx == fence_ctx; - need_ctx_switch = ring->current_ctx != fence_ctx; if (job && ring->funcs->emit_cntxcntl) { if (need_ctx_switch) status |= AMDGPU_HAVE_CTX_SWITCH; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h index 92bc89b..c3a7329 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h @@ -116,6 +116,7 @@ struct amdgpu_ring_funcs { void (*emit_vm_flush)(struct amdgpu_ring *ring, unsigned vm_id, uint64_t pd_addr); void (*emit_hdp_flush)(struct amdgpu_ring *ring); + void (*emit_vgt_flush)(struct amdgpu_ring *ring); void (*emit_hdp_invalidate)(struct amdgpu_ring *ring); void (*emit_gds_switch)(struct amdgpu_ring *ring, uint32_t vmid, uint32_t gds_base, uint32_t gds_size, diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 9017803..1d407d76 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -6187,6 +6187,18 @@ static void gfx_v8_0_ring_emit_hdp_flush(struct amdgpu_ring *ring) amdgpu_ring_write(ring, 0x20); /* poll interval */ } +static void gfx_v8_0_ring_emit_vgt_flush(struct amdgpu_ring *ring) { + amdgpu_ring_write(ring, PACKET3(PACKET3_EVENT_WRITE, 0)); + amdgpu_ring_write(ring, EVENT_TYPE(VS_PARTIAL_FLUSH) | + EVENT_INDEX(4)); + + amdgpu_ring_write(ring, PACKET3(PACKET3_EVENT_WRITE, 0)); + amdgpu_ring_write(ring, EVENT_TYPE(VGT_FLUSH) | + EVENT_INDEX(0)); +} + + static void gfx_v8_0_ring_emit_hdp_invalidate(struct amdgpu_ring *ring) { amdgpu_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3)); @@ -6590,6 +6602,7 @@ static const struct amdgpu_ring_funcs gfx_v8_0_ring_funcs_gfx = { .pad_ib = amdgpu_ring_generic_pad_ib, .emit_switch_buffer = gfx_v8_ring_emit_sb, .emit_cntxcntl = gfx_v8_ring_emit_cntxcntl, + .emit_vgt_flush = gfx_v8_0_ring_emit_vgt_flush, }; static const struct amdgpu_ring_funcs gfx_v8_0_ring_funcs_compute = { -- 1.9.1
