Am 29.08.2016 um 04:55 schrieb Monk Liu:
> sync switch buffer scheme with windows kmd for gfx v8,
> Now always and only insert one switch buffer to the
> end of CS.
>
> Change-Id: Ief8539b2ad91ccb38b9adbfb54e27d8282f3a3bd
> Signed-off-by: Monk Liu <Monk.Liu at amd.com>
This patch doesn't seem to apply on any of the public branches, please
make sure to rebase on to of amd-staging-4.6 before sending it out.
Apart from this the patch is Reviewed-by: Christian König
<christian.koenig at amd.com>.
Regards,
Christian.
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
> drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 2 ++
> drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 13 +++++++------
> 3 files changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index cb0098a..a935831 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -338,6 +338,7 @@ struct amdgpu_ring_funcs {
> void (*end_use)(struct amdgpu_ring *ring);
> void (*emit_wreg) (struct amdgpu_ring *ring, uint32_t offset, uint32_t val);
> void (*emit_rreg) (struct amdgpu_ring *ring, uint32_t offset);
> + void (*emit_switch_buffer) (struct amdgpu_ring *ring);
> };
>
> /*
> @@ -2372,6 +2373,7 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
> #define amdgpu_ring_emit_hdp_invalidate(r) (r)->funcs->emit_hdp_invalidate((r))
> #define amdgpu_ring_emit_wreg(r, i, v) (r)->funcs->emit_wreg((r), (i), (v))
> #define amdgpu_ring_emit_rreg(r, i) (r)->funcs->emit_rreg((r), (i))
> +#define amdgpu_ring_emit_switch_buffer(r) (r)->funcs->emit_switch_buffer((r))
> #define amdgpu_ring_pad_ib(r, ib) ((r)->funcs->pad_ib((r), (ib)))
> #define amdgpu_ring_init_cond_exec(r) (r)->funcs->init_cond_exec((r))
> #define amdgpu_ring_patch_cond_exec(r,o) (r)->funcs->patch_cond_exec((r),(o))
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> index a31d7ef..029ee79 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> @@ -210,6 +210,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
> amdgpu_ring_patch_cond_exec(ring, patch_offset);
>
> ring->current_ctx = ctx;
> + if (ring->funcs->emit_switch_buffer)
> + amdgpu_ring_emit_switch_buffer(ring);
> amdgpu_ring_commit(ring);
> return 0;
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> index dfa2288..26fced0 100755
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> @@ -5936,12 +5936,6 @@ static void gfx_v8_0_ring_emit_ib_gfx(struct amdgpu_ring *ring,
> {
> u32 header, control = 0;
>
> - /* insert SWITCH_BUFFER packet before first IB in the ring frame */
> - if (ctx_switch) {
> - amdgpu_ring_write(ring, PACKET3(PACKET3_SWITCH_BUFFER, 0));
> - amdgpu_ring_write(ring, 0);
> - }
> -
> if (ib->flags & AMDGPU_IB_FLAG_CE)
> header = PACKET3(PACKET3_INDIRECT_BUFFER_CONST, 2);
> else
> @@ -6170,6 +6164,12 @@ static void gfx_v8_0_ring_emit_wreg_kiq(struct amdgpu_ring *ring, u32 idx, u32 v
> amdgpu_ring_write(ring, val);
> }
>
> +static void gfx_v8_ring_emit_sb(struct amdgpu_ring *ring)
> +{
> + amdgpu_ring_write(ring, PACKET3(PACKET3_SWITCH_BUFFER, 0));
> + amdgpu_ring_write(ring, 0);
> +}
> +
> static void gfx_v8_0_set_gfx_eop_interrupt_state(struct amdgpu_device *adev,
> enum amdgpu_interrupt_state state)
> {
> @@ -6477,6 +6477,7 @@ static const struct amdgpu_ring_funcs gfx_v8_0_ring_funcs_gfx = {
> .test_ib = gfx_v8_0_ring_test_ib,
> .insert_nop = amdgpu_ring_insert_nop,
> .pad_ib = amdgpu_ring_generic_pad_ib,
> + .emit_switch_buffer = gfx_v8_ring_emit_sb,
> };
>
> static const struct amdgpu_ring_funcs gfx_v8_0_ring_funcs_compute = {
