diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_mman.c | 21 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_mman.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_object_types.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 36 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt_types.h | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 4 |
8 files changed, 79 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index b55befda3387..73d9eda1d6b7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -550,6 +550,20 @@ out: intel_runtime_pm_put(&i915->runtime_pm, wakeref); } +void i915_gem_object_runtime_pm_release_mmap_offset(struct drm_i915_gem_object *obj) +{ + struct ttm_buffer_object *bo = i915_gem_to_ttm(obj); + struct ttm_device *bdev = bo->bdev; + + drm_vma_node_unmap(&bo->base.vma_node, bdev->dev_mapping); + + if (obj->userfault_count) { + /* rpm wakeref provide exclusive access */ + list_del(&obj->userfault_link); + obj->userfault_count = 0; + } +} + void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj) { struct i915_mmap_offset *mmo, *mn; @@ -573,6 +587,13 @@ void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj) spin_lock(&obj->mmo.lock); } spin_unlock(&obj->mmo.lock); + + if (obj->userfault_count) { + mutex_lock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + list_del(&obj->userfault_link); + mutex_unlock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + obj->userfault_count = 0; + } } static struct i915_mmap_offset * diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.h b/drivers/gpu/drm/i915/gem/i915_gem_mman.h index efee9e0d2508..1fa91b3033b3 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.h @@ -27,6 +27,7 @@ int i915_gem_dumb_mmap_offset(struct drm_file *file_priv, void __i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj); void i915_gem_object_release_mmap_gtt(struct drm_i915_gem_object *obj); +void i915_gem_object_runtime_pm_release_mmap_offset(struct drm_i915_gem_object *obj); void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj); #endif diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 85482a04d158..7ff9c7877bec 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -238,7 +238,7 @@ static void __i915_gem_object_free_mmaps(struct drm_i915_gem_object *obj) { /* Skip serialisation and waking the device if known to be not used. */ - if (obj->userfault_count) + if (obj->userfault_count && !IS_DGFX(to_i915(obj->base.dev))) i915_gem_object_release_mmap_gtt(obj); if (!RB_EMPTY_ROOT(&obj->mmo.offsets)) { diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 9f6b14ec189a..40305e2bcd49 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -298,7 +298,8 @@ struct drm_i915_gem_object { }; /** - * Whether the object is currently in the GGTT mmap. + * Whether the object is currently in the GGTT or any other supported + * fake offset mmap backed by lmem. */ unsigned int userfault_count; struct list_head userfault_link; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c index 6f3ab7ade41a..dea6e378946f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c @@ -548,9 +548,18 @@ static int i915_ttm_shrink(struct drm_i915_gem_object *obj, unsigned int flags) static void i915_ttm_delete_mem_notify(struct ttm_buffer_object *bo) { struct drm_i915_gem_object *obj = i915_ttm_to_gem(bo); + intel_wakeref_t wakeref = 0; if (likely(obj)) { + /* ttm_bo_release() already has dma_resv_lock */ + if (i915_ttm_cpu_maps_iomem(bo->resource)) + wakeref = intel_runtime_pm_get(&to_i915(obj->base.dev)->runtime_pm); + __i915_gem_object_pages_fini(obj); + + if (wakeref) + intel_runtime_pm_put(&to_i915(obj->base.dev)->runtime_pm, wakeref); + i915_ttm_free_cached_io_rsgt(obj); } } @@ -1020,6 +1029,7 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) struct ttm_buffer_object *bo = area->vm_private_data; struct drm_device *dev = bo->base.dev; struct drm_i915_gem_object *obj; + intel_wakeref_t wakeref = 0; vm_fault_t ret; int idx; @@ -1041,6 +1051,9 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) return VM_FAULT_SIGBUS; } + if (i915_ttm_cpu_maps_iomem(bo->resource)) + wakeref = intel_runtime_pm_get(&to_i915(obj->base.dev)->runtime_pm); + if (!i915_ttm_resource_mappable(bo->resource)) { int err = -ENODEV; int i; @@ -1062,7 +1075,8 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) if (err) { drm_dbg(dev, "Unable to make resource CPU accessible\n"); dma_resv_unlock(bo->base.resv); - return VM_FAULT_SIGBUS; + ret = VM_FAULT_SIGBUS; + goto out_rpm; } } @@ -1073,12 +1087,30 @@ static vm_fault_t vm_fault_ttm(struct vm_fault *vmf) } else { ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot); } + if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) - return ret; + goto out_rpm; + + /* ttm_bo_vm_reserve() already has dma_resv_lock */ + if (ret == VM_FAULT_NOPAGE && wakeref && !obj->userfault_count) { + obj->userfault_count = 1; + mutex_lock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + list_add(&obj->userfault_link, &to_gt(to_i915(obj->base.dev))->lmem_userfault_list); + mutex_unlock(&to_gt(to_i915(obj->base.dev))->lmem_userfault_lock); + } + + if (wakeref & CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND) + intel_wakeref_auto(&to_gt(to_i915(obj->base.dev))->userfault_wakeref, + msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)); i915_ttm_adjust_lru(obj); dma_resv_unlock(bo->base.resv); + +out_rpm: + if (wakeref) + intel_runtime_pm_put(&to_i915(obj->base.dev)->runtime_pm, wakeref); + return ret; } diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index f7a918f9de0d..926a1515cd3b 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -39,6 +39,8 @@ void intel_gt_common_init_early(struct intel_gt *gt) { spin_lock_init(gt->irq_lock); + INIT_LIST_HEAD(>->lmem_userfault_list); + mutex_init(>->lmem_userfault_lock); INIT_LIST_HEAD(>->closed_vma); spin_lock_init(>->closed_lock); diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h index 0757d9577551..f19c2de77ff6 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h @@ -141,6 +141,20 @@ struct intel_gt { struct intel_wakeref wakeref; atomic_t user_wakeref; + /** + * Protects access to lmem usefault list. + * It is required, if we are outside of the runtime suspend path, + * access to @lmem_userfault_list requires always first grabbing the + * runtime pm, to ensure we can't race against runtime suspend. + * Once we have that we also need to grab @lmem_userfault_lock, + * at which point we have exclusive access. + * The runtime suspend path is special since it doesn't really hold any locks, + * but instead has exclusive access by virtue of all other accesses requiring + * holding the runtime pm wakeref. + */ + struct mutex lmem_userfault_lock; + struct list_head lmem_userfault_list; + struct list_head closed_vma; spinlock_t closed_lock; /* guards the list of closed_vma */ diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index cc1117c7e352..c8e14ed9c2a9 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -842,6 +842,10 @@ void i915_gem_runtime_suspend(struct drm_i915_private *i915) &to_gt(i915)->ggtt->userfault_list, userfault_link) __i915_gem_object_release_mmap_gtt(obj); + list_for_each_entry_safe(obj, on, + &to_gt(i915)->lmem_userfault_list, userfault_link) + i915_gem_object_runtime_pm_release_mmap_offset(obj); + /* * The fence will be lost when the device powers down. If any were * in use by hardware (i.e. they are pinned), we should not be powering |