From 971fe9a9414b2ccabc11ff6a5ff6be0d6f2dabda Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Tue, 1 Mar 2016 15:09:25 +0100 Subject: [PATCH] drm/amdgpu: switch the GDS only on demand v2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Switching the GDS space to often seems to be problematic. This patch together with the following can avoid VM faults on context switch. v2: extend commit message a bit Signed-off-by: Christian König Reviewed-by: Alex Deucher (v1) Reviewed-by: Chunming Zhou (v1) --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 8 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 4 +++ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 43 ++++++++++++++++++++++++-- 3 files changed, 53 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index b6fae4b301d7..866b5fa298e7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -922,6 +922,13 @@ struct amdgpu_vm_manager_id { struct list_head list; struct fence *active; atomic_long_t owner; + + uint32_t gds_base; + uint32_t gds_size; + uint32_t gws_base; + uint32_t gws_size; + uint32_t oa_base; + uint32_t oa_size; }; struct amdgpu_vm_manager { @@ -961,6 +968,7 @@ void amdgpu_vm_flush(struct amdgpu_ring *ring, uint32_t gds_base, uint32_t gds_size, uint32_t gws_base, uint32_t gws_size, uint32_t oa_base, uint32_t oa_size); +void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vm_id); uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr); int amdgpu_vm_update_page_directory(struct amdgpu_device *adev, struct amdgpu_vm *vm); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index e63e57e51db7..798d46626820 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -165,6 +165,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, if (ib->ctx != ctx || ib->vm != vm) { ring->current_ctx = old_ctx; + if (ib->vm_id) + amdgpu_vm_reset_id(adev, ib->vm_id); amdgpu_ring_undo(ring); return -EINVAL; } @@ -181,6 +183,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, if (r) { dev_err(adev->dev, "failed to emit fence (%d)\n", r); ring->current_ctx = old_ctx; + if (ib->vm_id) + amdgpu_vm_reset_id(adev, ib->vm_id); amdgpu_ring_undo(ring); return r; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 5fab5b25b935..8642a1ccd6c3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -252,16 +252,53 @@ void amdgpu_vm_flush(struct amdgpu_ring *ring, uint32_t gws_base, uint32_t gws_size, uint32_t oa_base, uint32_t oa_size) { + struct amdgpu_device *adev = ring->adev; + struct amdgpu_vm_manager_id *mgr_id = &adev->vm_manager.ids[vm_id]; + if (pd_addr != AMDGPU_VM_NO_FLUSH) { trace_amdgpu_vm_flush(pd_addr, ring->idx, vm_id); amdgpu_ring_emit_vm_flush(ring, vm_id, pd_addr); } - if (ring->funcs->emit_gds_switch) + if (ring->funcs->emit_gds_switch && ( + mgr_id->gds_base != gds_base || + mgr_id->gds_size != gds_size || + mgr_id->gws_base != gws_base || + mgr_id->gws_size != gws_size || + mgr_id->oa_base != oa_base || + mgr_id->oa_size != oa_size)) { + + mgr_id->gds_base = gds_base; + mgr_id->gds_size = gds_size; + mgr_id->gws_base = gws_base; + mgr_id->gws_size = gws_size; + mgr_id->oa_base = oa_base; + mgr_id->oa_size = oa_size; amdgpu_ring_emit_gds_switch(ring, vm_id, gds_base, gds_size, gws_base, gws_size, oa_base, oa_size); + } +} + +/** + * amdgpu_vm_reset_id - reset VMID to zero + * + * @adev: amdgpu device structure + * @vm_id: vmid number to use + * + * Reset saved GDW, GWS and OA to force switch on next flush. + */ +void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vm_id) +{ + struct amdgpu_vm_manager_id *mgr_id = &adev->vm_manager.ids[vm_id]; + + mgr_id->gds_base = 0; + mgr_id->gds_size = 0; + mgr_id->gws_base = 0; + mgr_id->gws_size = 0; + mgr_id->oa_base = 0; + mgr_id->oa_size = 0; } /** @@ -1425,9 +1462,11 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev) INIT_LIST_HEAD(&adev->vm_manager.ids_lru); /* skip over VMID 0, since it is the system VM */ - for (i = 1; i < adev->vm_manager.num_ids; ++i) + for (i = 1; i < adev->vm_manager.num_ids; ++i) { + amdgpu_vm_reset_id(adev, i); list_add_tail(&adev->vm_manager.ids[i].list, &adev->vm_manager.ids_lru); + } atomic_set(&adev->vm_manager.vm_pte_next_ring, 0); } -- 2.20.1