From 4bc91dbde0da2f88b1f3660e8d17dacd2e929a62 Mon Sep 17 00:00:00 2001 From: Anusha Srivatsa Date: Tue, 27 Apr 2021 09:54:16 +0100 Subject: drm/i915/lmem: Bypass aperture when lmem is available MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In the scenario where local memory is available, we have rely on CPU access via lmem directly instead of aperture. v2: gmch is only relevant for much older hw, therefore we can drop the has_aperture check since it should always be present on such platforms. (Chris) Cc: Ville Syrjälä Cc: Dhinakaran Pandiyan Cc: Maarten Lankhorst Cc: Chris P Wilson Cc: Daniel Vetter Cc: Joonas Lahtinen Cc: Daniele Ceraolo Spurio Cc: CQ Tang Signed-off-by: Anusha Srivatsa Signed-off-by: Matthew Auld Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20210427085417.120246-6-matthew.auld@intel.com --- drivers/gpu/drm/i915/display/intel_fbdev.c | 22 +++++++++++++++------- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 15 +++++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_lmem.h | 5 +++++ drivers/gpu/drm/i915/i915_vma.c | 25 +++++++++++++++++++------ 4 files changed, 54 insertions(+), 13 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 2b37959da747..4af40229f5ec 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -139,14 +139,22 @@ static int intelfb_alloc(struct drm_fb_helper *helper, size = mode_cmd.pitches[0] * mode_cmd.height; size = PAGE_ALIGN(size); - /* If the FB is too big, just don't use it since fbdev is not very - * important and we should probably use that space with FBC or other - * features. */ obj = ERR_PTR(-ENODEV); - if (size * 2 < dev_priv->stolen_usable_size) - obj = i915_gem_object_create_stolen(dev_priv, size); - if (IS_ERR(obj)) - obj = i915_gem_object_create_shmem(dev_priv, size); + if (HAS_LMEM(dev_priv)) { + obj = i915_gem_object_create_lmem(dev_priv, size, + I915_BO_ALLOC_CONTIGUOUS); + } else { + /* + * If the FB is too big, just don't use it since fbdev is not very + * important and we should probably use that space with FBC or other + * features. + */ + if (size * 2 < dev_priv->stolen_usable_size) + obj = i915_gem_object_create_stolen(dev_priv, size); + if (IS_ERR(obj)) + obj = i915_gem_object_create_shmem(dev_priv, size); + } + if (IS_ERR(obj)) { drm_err(&dev_priv->drm, "failed to allocate framebuffer\n"); return PTR_ERR(obj); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c index 017db8f71130..f44bdd08f7cb 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c @@ -17,6 +17,21 @@ const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops = { .release = i915_gem_object_release_memory_region, }; +void __iomem * +i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, + unsigned long n, + unsigned long size) +{ + resource_size_t offset; + + GEM_BUG_ON(!i915_gem_object_is_contiguous(obj)); + + offset = i915_gem_object_get_dma_address(obj, n); + offset -= obj->mm.region->region.start; + + return io_mapping_map_wc(&obj->mm.region->iomap, offset, size); +} + bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj) { struct intel_memory_region *mr = obj->mm.region; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h index 036d53c01de9..fac6bc5a5ebb 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.h @@ -14,6 +14,11 @@ struct intel_memory_region; extern const struct drm_i915_gem_object_ops i915_gem_lmem_obj_ops; +void __iomem * +i915_gem_object_lmem_io_map(struct drm_i915_gem_object *obj, + unsigned long n, + unsigned long size); + bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj); struct drm_i915_gem_object * diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index eb01899ac6b7..468317e3b477 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -27,6 +27,7 @@ #include "display/intel_frontbuffer.h" +#include "gem/i915_gem_lmem.h" #include "gt/intel_engine.h" #include "gt/intel_engine_heartbeat.h" #include "gt/intel_gt.h" @@ -448,9 +449,11 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) void __iomem *ptr; int err; - if (GEM_WARN_ON(!i915_vma_is_map_and_fenceable(vma))) { - err = -ENODEV; - goto err; + if (!i915_gem_object_is_lmem(vma->obj)) { + if (GEM_WARN_ON(!i915_vma_is_map_and_fenceable(vma))) { + err = -ENODEV; + goto err; + } } GEM_BUG_ON(!i915_vma_is_ggtt(vma)); @@ -458,9 +461,19 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma) ptr = READ_ONCE(vma->iomap); if (ptr == NULL) { - ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap, - vma->node.start, - vma->node.size); + /* + * TODO: consider just using i915_gem_object_pin_map() for lmem + * instead, which already supports mapping non-contiguous chunks + * of pages, that way we can also drop the + * I915_BO_ALLOC_CONTIGUOUS when allocating the object. + */ + if (i915_gem_object_is_lmem(vma->obj)) + ptr = i915_gem_object_lmem_io_map(vma->obj, 0, + vma->obj->base.size); + else + ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap, + vma->node.start, + vma->node.size); if (ptr == NULL) { err = -ENOMEM; goto err; -- cgit v1.2.3