From: "Thomas Hellström" <thomas.hellstrom@linux.intel.com> To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>, "Matthew Auld" <matthew.auld@intel.com> Subject: [PATCH v10 09/11] drm/i915/lmem: Verify checks for lmem residency Date: Wed, 2 Jun 2021 10:38:16 +0200 [thread overview] Message-ID: <20210602083818.241793-10-thomas.hellstrom@linux.intel.com> (raw) In-Reply-To: <20210602083818.241793-1-thomas.hellstrom@linux.intel.com> Since objects can be migrated or evicted when not pinned or locked, update the checks for lmem residency or future residency so that the value returned is not immediately stale. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> --- v2: Simplify i915_gem_object_migratable() (Reported by Mattew Auld) --- drivers/gpu/drm/i915/display/intel_display.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 42 +++++++++++++++++++- drivers/gpu/drm/i915/gem/i915_gem_object.c | 18 +++++++++ drivers/gpu/drm/i915/gem/i915_gem_object.h | 4 ++ 4 files changed, 64 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index caf0414e0b50..f947295d7e53 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -11756,7 +11756,7 @@ intel_user_framebuffer_create(struct drm_device *dev, /* object is backed with LMEM for discrete */ i915 = to_i915(obj->base.dev); - if (HAS_LMEM(i915) && !i915_gem_object_is_lmem(obj)) { + if (HAS_LMEM(i915) && !i915_gem_object_validates_to_lmem(obj)) { /* object is "remote", not in local memory */ i915_gem_object_put(obj); return ERR_PTR(-EREMOTE); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index 2b8cd15de1d9..d539dffa1554 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -23,10 +23,50 @@ i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, return io_mapping_map_wc(&obj->mm.region->iomap, offset, size); } +/** + * i915_gem_object_validates_to_lmem - Whether the object is resident in + * lmem when pages are present. + * @obj: The object to check. + * + * Migratable objects residency may change from under us if the object is + * not pinned or locked. This function is intended to be used to check whether + * the object can only reside in lmem when pages are present. + * + * Return: Whether the object is always resident in lmem when pages are + * present. + */ +bool i915_gem_object_validates_to_lmem(struct drm_i915_gem_object *obj) +{ + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); + + return !i915_gem_object_migratable(obj) && + mr && (mr->type == INTEL_MEMORY_LOCAL || + mr->type == INTEL_MEMORY_STOLEN_LOCAL); +} + +/** + * i915_gem_object_is_lmem - Whether the object is resident in + * lmem + * @obj: The object to check. + * + * Even if an object is allowed to migrate and change memory region, + * this function checks whether it will always be present in lmem when + * valid *or* if that's not the case, whether it's currently resident in lmem. + * For migratable and evictable objects, the latter only makes sense when + * the object is locked. + * + * Return: Whether the object migratable but resident in lmem, or not + * migratable and will be present in lmem when valid. + */ bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) { - struct intel_memory_region *mr = obj->mm.region; + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); +#ifdef CONFIG_LOCKDEP + if (i915_gem_object_migratable(obj) && + i915_gem_object_evictable(obj)) + assert_object_held(obj); +#endif return mr && (mr->type == INTEL_MEMORY_LOCAL || mr->type == INTEL_MEMORY_STOLEN_LOCAL); } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 16eac5ea9238..cf18c430d51f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -457,6 +457,24 @@ bool i915_gem_object_evictable(struct drm_i915_gem_object *obj) return pin_count == 0; } +/** + * i915_gem_object_migratable - Whether the object is migratable out of the + * current region. + * @obj: Pointer to the object. + * + * Return: Whether the object is allowed to be resident in other + * regions than the current while pages are present. + */ +bool i915_gem_object_migratable(struct drm_i915_gem_object *obj) +{ + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); + + if (!mr) + return false; + + return obj->mm.n_placements > 1; +} + void i915_gem_init__objects(struct drm_i915_private *i915) { INIT_WORK(&i915->mm.free_work, __i915_gem_free_work); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index ae5930e307d5..a3ad8cf4eefd 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -596,6 +596,10 @@ void __i915_gem_free_object(struct drm_i915_gem_object *obj); bool i915_gem_object_evictable(struct drm_i915_gem_object *obj); +bool i915_gem_object_migratable(struct drm_i915_gem_object *obj); + +bool i915_gem_object_validates_to_lmem(struct drm_i915_gem_object *obj); + #ifdef CONFIG_MMU_NOTIFIER static inline bool i915_gem_object_is_userptr(struct drm_i915_gem_object *obj) -- 2.31.1
WARNING: multiple messages have this Message-ID (diff)
From: "Thomas Hellström" <thomas.hellstrom@linux.intel.com> To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>, "Matthew Auld" <matthew.auld@intel.com> Subject: [Intel-gfx] [PATCH v10 09/11] drm/i915/lmem: Verify checks for lmem residency Date: Wed, 2 Jun 2021 10:38:16 +0200 [thread overview] Message-ID: <20210602083818.241793-10-thomas.hellstrom@linux.intel.com> (raw) In-Reply-To: <20210602083818.241793-1-thomas.hellstrom@linux.intel.com> Since objects can be migrated or evicted when not pinned or locked, update the checks for lmem residency or future residency so that the value returned is not immediately stale. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> --- v2: Simplify i915_gem_object_migratable() (Reported by Mattew Auld) --- drivers/gpu/drm/i915/display/intel_display.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 42 +++++++++++++++++++- drivers/gpu/drm/i915/gem/i915_gem_object.c | 18 +++++++++ drivers/gpu/drm/i915/gem/i915_gem_object.h | 4 ++ 4 files changed, 64 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index caf0414e0b50..f947295d7e53 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -11756,7 +11756,7 @@ intel_user_framebuffer_create(struct drm_device *dev, /* object is backed with LMEM for discrete */ i915 = to_i915(obj->base.dev); - if (HAS_LMEM(i915) && !i915_gem_object_is_lmem(obj)) { + if (HAS_LMEM(i915) && !i915_gem_object_validates_to_lmem(obj)) { /* object is "remote", not in local memory */ i915_gem_object_put(obj); return ERR_PTR(-EREMOTE); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index 2b8cd15de1d9..d539dffa1554 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -23,10 +23,50 @@ i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, return io_mapping_map_wc(&obj->mm.region->iomap, offset, size); } +/** + * i915_gem_object_validates_to_lmem - Whether the object is resident in + * lmem when pages are present. + * @obj: The object to check. + * + * Migratable objects residency may change from under us if the object is + * not pinned or locked. This function is intended to be used to check whether + * the object can only reside in lmem when pages are present. + * + * Return: Whether the object is always resident in lmem when pages are + * present. + */ +bool i915_gem_object_validates_to_lmem(struct drm_i915_gem_object *obj) +{ + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); + + return !i915_gem_object_migratable(obj) && + mr && (mr->type == INTEL_MEMORY_LOCAL || + mr->type == INTEL_MEMORY_STOLEN_LOCAL); +} + +/** + * i915_gem_object_is_lmem - Whether the object is resident in + * lmem + * @obj: The object to check. + * + * Even if an object is allowed to migrate and change memory region, + * this function checks whether it will always be present in lmem when + * valid *or* if that's not the case, whether it's currently resident in lmem. + * For migratable and evictable objects, the latter only makes sense when + * the object is locked. + * + * Return: Whether the object migratable but resident in lmem, or not + * migratable and will be present in lmem when valid. + */ bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) { - struct intel_memory_region *mr = obj->mm.region; + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); +#ifdef CONFIG_LOCKDEP + if (i915_gem_object_migratable(obj) && + i915_gem_object_evictable(obj)) + assert_object_held(obj); +#endif return mr && (mr->type == INTEL_MEMORY_LOCAL || mr->type == INTEL_MEMORY_STOLEN_LOCAL); } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 16eac5ea9238..cf18c430d51f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -457,6 +457,24 @@ bool i915_gem_object_evictable(struct drm_i915_gem_object *obj) return pin_count == 0; } +/** + * i915_gem_object_migratable - Whether the object is migratable out of the + * current region. + * @obj: Pointer to the object. + * + * Return: Whether the object is allowed to be resident in other + * regions than the current while pages are present. + */ +bool i915_gem_object_migratable(struct drm_i915_gem_object *obj) +{ + struct intel_memory_region *mr = READ_ONCE(obj->mm.region); + + if (!mr) + return false; + + return obj->mm.n_placements > 1; +} + void i915_gem_init__objects(struct drm_i915_private *i915) { INIT_WORK(&i915->mm.free_work, __i915_gem_free_work); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index ae5930e307d5..a3ad8cf4eefd 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -596,6 +596,10 @@ void __i915_gem_free_object(struct drm_i915_gem_object *obj); bool i915_gem_object_evictable(struct drm_i915_gem_object *obj); +bool i915_gem_object_migratable(struct drm_i915_gem_object *obj); + +bool i915_gem_object_validates_to_lmem(struct drm_i915_gem_object *obj); + #ifdef CONFIG_MMU_NOTIFIER static inline bool i915_gem_object_is_userptr(struct drm_i915_gem_object *obj) -- 2.31.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2021-06-02 8:39 UTC|newest] Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-02 8:38 [PATCH v10 00/11] Move LMEM (VRAM) management over to TTM Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 01/11] drm/i915/ttm Initialize the ttm device and memory managers Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 02/11] drm/i915/ttm: Embed a ttm buffer object in the i915 gem object Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 03/11] drm/ttm: Add a generic TTM memcpy move for page-based iomem Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-08-30 1:54 ` Dave Airlie 2021-08-30 6:16 ` Christian König 2021-08-30 7:08 ` Thomas Hellström 2021-08-30 7:53 ` Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 04/11] drm: Add a prefetching memcpy_from_wc Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 05/11] drm/ttm: Use drm_memcpy_from_wc for TTM bo moves Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 06/11] drm/ttm: Document and optimize ttm_bo_pipeline_gutting() Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 07/11] drm/ttm, drm/amdgpu: Allow the driver some control over swapping Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 08/11] drm/i915/ttm: Introduce a TTM i915 gem object backend Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` Thomas Hellström [this message] 2021-06-02 8:38 ` [Intel-gfx] [PATCH v10 09/11] drm/i915/lmem: Verify checks for lmem residency Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 10/11] drm/vma: Add a driver_private member to vma_node Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 8:38 ` [PATCH v10 11/11] drm/i915: Use ttm mmap handling for ttm bo's Thomas Hellström 2021-06-02 8:38 ` [Intel-gfx] " Thomas Hellström 2021-06-02 9:01 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Move LMEM (VRAM) management over to TTM (rev6) Patchwork 2021-06-02 9:04 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork 2021-06-02 9:32 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork 2021-06-02 17:04 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
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