On 2022-10-18 05:08, jiadong.zhu@xxxxxxx wrote:
> From: "Jiadong.Zhu" <Jiadong.Zhu@xxxxxxx>
>
> 1. Modify the unmap_queue package on gfx9. Add trailing fence to track the
> preemption done.
> 2. Modify emit_ce_meta emit_de_meta functions for the resumed ibs.
>
> v2: Restyle code not to use ternary operator.
> v3: Modify code format.
> v4: Enable Mid-Command Buffer Preemption for gfx9 by default.
>
> Cc: Christian Koenig <Christian.Koenig@xxxxxxx>
> Cc: Michel Dänzer <michel@xxxxxxxxxxx>
> Signed-off-by: Jiadong.Zhu <Jiadong.Zhu@xxxxxxx>
> Acked-by: Christian König <christian.koenig@xxxxxxx>
> Acked-by: Huang Rui <ray.huang@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
> drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 181 +++++++++++++++++++----
> drivers/gpu/drm/amd/amdgpu/soc15d.h | 2 +
> 3 files changed, 155 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> index f08ee1ac281c..e90d327a589e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
> @@ -60,6 +60,7 @@ enum amdgpu_ring_priority_level {
> #define AMDGPU_FENCE_FLAG_64BIT (1 << 0)
> #define AMDGPU_FENCE_FLAG_INT (1 << 1)
> #define AMDGPU_FENCE_FLAG_TC_WB_ONLY (1 << 2)
> +#define AMDGPU_FENCE_FLAG_EXEC (1 << 3)
>
> #define to_amdgpu_ring(s) container_of((s), struct amdgpu_ring, sched)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> index 8d4fbc9e3fc0..01ec0551d26a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> @@ -753,7 +753,7 @@ static void gfx_v9_0_set_rlc_funcs(struct amdgpu_device *adev);
> static int gfx_v9_0_get_cu_info(struct amdgpu_device *adev,
> struct amdgpu_cu_info *cu_info);
> static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device *adev);
> -static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring);
> +static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring, bool resume);
> static u64 gfx_v9_0_ring_get_rptr_compute(struct amdgpu_ring *ring);
> static void gfx_v9_0_query_ras_error_count(struct amdgpu_device *adev,
> void *ras_error_status);
> @@ -826,9 +826,10 @@ static void gfx_v9_0_kiq_unmap_queues(struct amdgpu_ring *kiq_ring,
> PACKET3_UNMAP_QUEUES_DOORBELL_OFFSET0(ring->doorbell_index));
>
> if (action == PREEMPT_QUEUES_NO_UNMAP) {
> - amdgpu_ring_write(kiq_ring, lower_32_bits(gpu_addr));
> - amdgpu_ring_write(kiq_ring, upper_32_bits(gpu_addr));
> - amdgpu_ring_write(kiq_ring, seq);
> + amdgpu_ring_write(kiq_ring, lower_32_bits(ring->wptr & ring->buf_mask));
> + amdgpu_ring_write(kiq_ring, 0);
> + amdgpu_ring_write(kiq_ring, 0);
> +
> } else {
> amdgpu_ring_write(kiq_ring, 0);
> amdgpu_ring_write(kiq_ring, 0);
> @@ -5369,11 +5370,17 @@ static void gfx_v9_0_ring_emit_ib_gfx(struct amdgpu_ring *ring,
>
> control |= ib->length_dw | (vmid << 24);
>
> - if (amdgpu_sriov_vf(ring->adev) && (ib->flags & AMDGPU_IB_FLAG_PREEMPT)) {
> + if (ib->flags & AMDGPU_IB_FLAG_PREEMPT) {
> control |= INDIRECT_BUFFER_PRE_ENB(1);
>
> + if (flags & AMDGPU_IB_PREEMPTED)
> + control |= INDIRECT_BUFFER_PRE_RESUME(1);
> +
> if (!(ib->flags & AMDGPU_IB_FLAG_CE) && vmid)
> - gfx_v9_0_ring_emit_de_meta(ring);
> + gfx_v9_0_ring_emit_de_meta(ring,
> + (!amdgpu_sriov_vf(ring->adev) &&
> + flags & AMDGPU_IB_PREEMPTED) ?
> + true : false);
> }
>
> amdgpu_ring_write(ring, header);
> @@ -5428,17 +5435,23 @@ static void gfx_v9_0_ring_emit_fence(struct amdgpu_ring *ring, u64 addr,
> bool write64bit = flags & AMDGPU_FENCE_FLAG_64BIT;
> bool int_sel = flags & AMDGPU_FENCE_FLAG_INT;
> bool writeback = flags & AMDGPU_FENCE_FLAG_TC_WB_ONLY;
> + bool exec = flags & AMDGPU_FENCE_FLAG_EXEC;
> + uint32_t dw2 = 0;
>
> /* RELEASE_MEM - flush caches, send int */
> amdgpu_ring_write(ring, PACKET3(PACKET3_RELEASE_MEM, 6));
> - amdgpu_ring_write(ring, ((writeback ? (EOP_TC_WB_ACTION_EN |
> - EOP_TC_NC_ACTION_EN) :
> - (EOP_TCL1_ACTION_EN |
> - EOP_TC_ACTION_EN |
> - EOP_TC_WB_ACTION_EN |
> - EOP_TC_MD_ACTION_EN)) |
> - EVENT_TYPE(CACHE_FLUSH_AND_INV_TS_EVENT) |
> - EVENT_INDEX(5)));
> +
> + if (writeback) {
> + dw2 = EOP_TC_WB_ACTION_EN | EOP_TC_NC_ACTION_EN;
> + } else {
> + dw2 = EOP_TCL1_ACTION_EN | EOP_TC_ACTION_EN |
> + EOP_TC_WB_ACTION_EN | EOP_TC_MD_ACTION_EN;
> + }
> + dw2 |= EVENT_TYPE(CACHE_FLUSH_AND_INV_TS_EVENT) | EVENT_INDEX(5);
You can pull out EOP_TC_WB_ACTION_EN, as it appears in either conditional, to look
something like this:
if (writeback) {
dw2 = EOP_TC_NC_ACTION_EN;
} else {
dw2 = EOP_TCL1_ACTION_EN |
EOP_TC_ACTION_EN |
EOP_TC_MD_ACTION_EN;
}
dw2 |= EOP_TC_WB_ACTION_EN | EVENT_TYPE(CACHE_FLUSH_AND_INV_TS_EVENT) | EVENT_INDEX(5);
Regards,
Luben
> + if (exec)
> + dw2 |= EOP_EXEC;
> +
> + amdgpu_ring_write(ring, dw2);
> amdgpu_ring_write(ring, DATA_SEL(write64bit ? 2 : 1) | INT_SEL(int_sel ? 2 : 0));
>
> /*
> @@ -5543,33 +5556,135 @@ static void gfx_v9_ring_emit_sb(struct amdgpu_ring *ring)
> amdgpu_ring_write(ring, 0);
> }
>
> -static void gfx_v9_0_ring_emit_ce_meta(struct amdgpu_ring *ring)
> +static void gfx_v9_0_ring_emit_ce_meta(struct amdgpu_ring *ring, bool resume)
> {
> + struct amdgpu_device *adev = ring->adev;
> struct v9_ce_ib_state ce_payload = {0};
> - uint64_t csa_addr;
> + uint64_t offset, ce_payload_gpu_addr;
> + void *ce_payload_cpu_addr;
> int cnt;
>
> cnt = (sizeof(ce_payload) >> 2) + 4 - 2;
> - csa_addr = amdgpu_csa_vaddr(ring->adev);
> +
> + if (ring->is_mes_queue) {
> + offset = offsetof(struct amdgpu_mes_ctx_meta_data,
> + gfx[0].gfx_meta_data) +
> + offsetof(struct v9_gfx_meta_data, ce_payload);
> + ce_payload_gpu_addr =
> + amdgpu_mes_ctx_get_offs_gpu_addr(ring, offset);
> + ce_payload_cpu_addr =
> + amdgpu_mes_ctx_get_offs_cpu_addr(ring, offset);
> + } else {
> + offset = offsetof(struct v9_gfx_meta_data, ce_payload);
> + ce_payload_gpu_addr = amdgpu_csa_vaddr(ring->adev) + offset;
> + ce_payload_cpu_addr = adev->virt.csa_cpu_addr + offset;
> + }
>
> amdgpu_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, cnt));
> amdgpu_ring_write(ring, (WRITE_DATA_ENGINE_SEL(2) |
> WRITE_DATA_DST_SEL(8) |
> WR_CONFIRM) |
> WRITE_DATA_CACHE_POLICY(0));
> - amdgpu_ring_write(ring, lower_32_bits(csa_addr + offsetof(struct v9_gfx_meta_data, ce_payload)));
> - amdgpu_ring_write(ring, upper_32_bits(csa_addr + offsetof(struct v9_gfx_meta_data, ce_payload)));
> - amdgpu_ring_write_multiple(ring, (void *)&ce_payload, sizeof(ce_payload) >> 2);
> + amdgpu_ring_write(ring, lower_32_bits(ce_payload_gpu_addr));
> + amdgpu_ring_write(ring, upper_32_bits(ce_payload_gpu_addr));
> +
> + if (resume)
> + amdgpu_ring_write_multiple(ring, ce_payload_cpu_addr,
> + sizeof(ce_payload) >> 2);
> + else
> + amdgpu_ring_write_multiple(ring, (void *)&ce_payload,
> + sizeof(ce_payload) >> 2);
> +}
> +
> +static int gfx_v9_0_ring_preempt_ib(struct amdgpu_ring *ring)
> +{
> + int i, r = 0;
> + struct amdgpu_device *adev = ring->adev;
> + struct amdgpu_kiq *kiq = &adev->gfx.kiq;
> + struct amdgpu_ring *kiq_ring = &kiq->ring;
> + unsigned long flags;
> +
> + if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
> + return -EINVAL;
> +
> + spin_lock_irqsave(&kiq->ring_lock, flags);
> +
> + if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size)) {
> + spin_unlock_irqrestore(&kiq->ring_lock, flags);
> + return -ENOMEM;
> + }
> +
> + /* assert preemption condition */
> + amdgpu_ring_set_preempt_cond_exec(ring, false);
> +
> + ring->trail_seq += 1;
> + amdgpu_ring_alloc(ring, 13);
> + gfx_v9_0_ring_emit_fence(ring, ring->trail_fence_gpu_addr,
> + ring->trail_seq, AMDGPU_FENCE_FLAG_EXEC);
> + /*reset the CP_VMID_PREEMPT after trailing fence*/
> + amdgpu_ring_emit_wreg(ring,
> + SOC15_REG_OFFSET(GC, 0, mmCP_VMID_PREEMPT),
> + 0x0);
> +
> + /* assert IB preemption, emit the trailing fence */
> + kiq->pmf->kiq_unmap_queues(kiq_ring, ring, PREEMPT_QUEUES_NO_UNMAP,
> + ring->trail_fence_gpu_addr,
> + ring->trail_seq);
> +
> + amdgpu_ring_commit(kiq_ring);
> + spin_unlock_irqrestore(&kiq->ring_lock, flags);
> +
> + /* poll the trailing fence */
> + for (i = 0; i < adev->usec_timeout; i++) {
> + if (ring->trail_seq ==
> + le32_to_cpu(*ring->trail_fence_cpu_addr))
> + break;
> + udelay(1);
> + }
> +
> + if (i >= adev->usec_timeout) {
> + r = -EINVAL;
> + DRM_ERROR("ring %d failed to preempt ib\n", ring->idx);
> + }
> +
> + amdgpu_ring_commit(ring);
> +
> + /* deassert preemption condition */
> + amdgpu_ring_set_preempt_cond_exec(ring, true);
> + return r;
> }
>
> -static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring)
> +static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring, bool resume)
> {
> + struct amdgpu_device *adev = ring->adev;
> struct v9_de_ib_state de_payload = {0};
> - uint64_t csa_addr, gds_addr;
> + uint64_t offset, gds_addr, de_payload_gpu_addr;
> + void *de_payload_cpu_addr;
> int cnt;
>
> - csa_addr = amdgpu_csa_vaddr(ring->adev);
> - gds_addr = csa_addr + 4096;
> + if (ring->is_mes_queue) {
> + offset = offsetof(struct amdgpu_mes_ctx_meta_data,
> + gfx[0].gfx_meta_data) +
> + offsetof(struct v9_gfx_meta_data, de_payload);
> + de_payload_gpu_addr =
> + amdgpu_mes_ctx_get_offs_gpu_addr(ring, offset);
> + de_payload_cpu_addr =
> + amdgpu_mes_ctx_get_offs_cpu_addr(ring, offset);
> +
> + offset = offsetof(struct amdgpu_mes_ctx_meta_data,
> + gfx[0].gds_backup) +
> + offsetof(struct v9_gfx_meta_data, de_payload);
> + gds_addr = amdgpu_mes_ctx_get_offs_gpu_addr(ring, offset);
> + } else {
> + offset = offsetof(struct v9_gfx_meta_data, de_payload);
> + de_payload_gpu_addr = amdgpu_csa_vaddr(ring->adev) + offset;
> + de_payload_cpu_addr = adev->virt.csa_cpu_addr + offset;
> +
> + gds_addr = ALIGN(amdgpu_csa_vaddr(ring->adev) +
> + AMDGPU_CSA_SIZE - adev->gds.gds_size,
> + PAGE_SIZE);
> + }
> +
> de_payload.gds_backup_addrlo = lower_32_bits(gds_addr);
> de_payload.gds_backup_addrhi = upper_32_bits(gds_addr);
>
> @@ -5579,9 +5694,15 @@ static void gfx_v9_0_ring_emit_de_meta(struct amdgpu_ring *ring)
> WRITE_DATA_DST_SEL(8) |
> WR_CONFIRM) |
> WRITE_DATA_CACHE_POLICY(0));
> - amdgpu_ring_write(ring, lower_32_bits(csa_addr + offsetof(struct v9_gfx_meta_data, de_payload)));
> - amdgpu_ring_write(ring, upper_32_bits(csa_addr + offsetof(struct v9_gfx_meta_data, de_payload)));
> - amdgpu_ring_write_multiple(ring, (void *)&de_payload, sizeof(de_payload) >> 2);
> + amdgpu_ring_write(ring, lower_32_bits(de_payload_gpu_addr));
> + amdgpu_ring_write(ring, upper_32_bits(de_payload_gpu_addr));
> +
> + if (resume)
> + amdgpu_ring_write_multiple(ring, de_payload_cpu_addr,
> + sizeof(de_payload) >> 2);
> + else
> + amdgpu_ring_write_multiple(ring, (void *)&de_payload,
> + sizeof(de_payload) >> 2);
> }
>
> static void gfx_v9_0_ring_emit_frame_cntl(struct amdgpu_ring *ring, bool start,
> @@ -5597,8 +5718,9 @@ static void gfx_v9_ring_emit_cntxcntl(struct amdgpu_ring *ring, uint32_t flags)
> {
> uint32_t dw2 = 0;
>
> - if (amdgpu_sriov_vf(ring->adev))
> - gfx_v9_0_ring_emit_ce_meta(ring);
> + gfx_v9_0_ring_emit_ce_meta(ring,
> + (!amdgpu_sriov_vf(ring->adev) &&
> + flags & AMDGPU_IB_PREEMPTED) ? true : false);
>
> dw2 |= 0x80000000; /* set load_enable otherwise this package is just NOPs */
> if (flags & AMDGPU_HAVE_CTX_SWITCH) {
> @@ -6925,6 +7047,7 @@ static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_gfx = {
> .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,
> + .preempt_ib = gfx_v9_0_ring_preempt_ib,
> .emit_frame_cntl = gfx_v9_0_ring_emit_frame_cntl,
> .emit_wreg = gfx_v9_0_ring_emit_wreg,
> .emit_reg_wait = gfx_v9_0_ring_emit_reg_wait,
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15d.h b/drivers/gpu/drm/amd/amdgpu/soc15d.h
> index 799925d22fc8..2357ff39323f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15d.h
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15d.h
> @@ -162,6 +162,7 @@
> * 2 - Bypass
> */
> #define INDIRECT_BUFFER_PRE_ENB(x) ((x) << 21)
> +#define INDIRECT_BUFFER_PRE_RESUME(x) ((x) << 30)
> #define PACKET3_COPY_DATA 0x40
> #define PACKET3_PFP_SYNC_ME 0x42
> #define PACKET3_COND_WRITE 0x45
> @@ -184,6 +185,7 @@
> #define EOP_TC_ACTION_EN (1 << 17) /* L2 */
> #define EOP_TC_NC_ACTION_EN (1 << 19)
> #define EOP_TC_MD_ACTION_EN (1 << 21) /* L2 metadata */
> +#define EOP_EXEC (1 << 28) /* For Trailing Fence */
>
> #define DATA_SEL(x) ((x) << 29)
> /* 0 - discard
