From 34c998b4ebf6c48154c76ea9bc9bffabd91a8af2 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 4 Aug 2016 07:52:24 +0100 Subject: [PATCH] drm/i915: Rearrange GGTT probing to avoid needing a vfunc Since we have a static if-else-chain for device probing of the global GTT, we do not need to use a function pointer, let alone store it when we never use it again. So use the if-else-chain to call down into the device specific probe. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-5-git-send-email-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_gtt.c | 109 +++++++++++++--------------- drivers/gpu/drm/i915/i915_gem_gtt.h | 3 - 2 files changed, 50 insertions(+), 62 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 72231ea4a802..03801297f85b 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -2118,7 +2118,6 @@ static void i915_address_space_init(struct i915_address_space *vm, struct drm_i915_private *dev_priv) { drm_mm_init(&vm->mm, vm->start, vm->total); - vm->dev = &dev_priv->drm; INIT_LIST_HEAD(&vm->active_list); INIT_LIST_HEAD(&vm->inactive_list); list_add_tail(&vm->global_link, &dev_priv->vm_list); @@ -2921,16 +2920,14 @@ static size_t gen9_get_stolen_size(u16 gen9_gmch_ctl) return (gen9_gmch_ctl - 0xf0 + 1) << 22; } -static int ggtt_probe_common(struct drm_i915_private *dev_priv, size_t gtt_size) +static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size) { - struct i915_ggtt *ggtt = &dev_priv->ggtt; - struct pci_dev *pdev = dev_priv->drm.pdev; + struct pci_dev *pdev = ggtt->base.dev->pdev; struct i915_page_scratch *scratch_page; - phys_addr_t ggtt_phys_addr; + phys_addr_t phys_addr; /* For Modern GENs the PTEs and register space are split in the BAR */ - ggtt_phys_addr = pci_resource_start(pdev, 0) + - (pci_resource_len(pdev, 0) / 2); + phys_addr = pci_resource_start(pdev, 0) + pci_resource_len(pdev, 0) / 2; /* * On BXT writes larger than 64 bit to the GTT pagetable range will be @@ -2939,16 +2936,16 @@ static int ggtt_probe_common(struct drm_i915_private *dev_priv, size_t gtt_size) * resort to an uncached mapping. The WC issue is easily caught by the * readback check when writing GTT PTE entries. */ - if (IS_BROXTON(dev_priv)) - ggtt->gsm = ioremap_nocache(ggtt_phys_addr, gtt_size); + if (IS_BROXTON(ggtt->base.dev)) + ggtt->gsm = ioremap_nocache(phys_addr, size); else - ggtt->gsm = ioremap_wc(ggtt_phys_addr, gtt_size); + ggtt->gsm = ioremap_wc(phys_addr, size); if (!ggtt->gsm) { - DRM_ERROR("Failed to map the gtt page table\n"); + DRM_ERROR("Failed to map the ggtt page table\n"); return -ENOMEM; } - scratch_page = alloc_scratch_page(&dev_priv->drm); + scratch_page = alloc_scratch_page(ggtt->base.dev); if (IS_ERR(scratch_page)) { DRM_ERROR("Scratch setup failed\n"); /* iounmap will also get called at remove, but meh */ @@ -3034,12 +3031,20 @@ static void chv_setup_private_ppat(struct drm_i915_private *dev_priv) I915_WRITE(GEN8_PRIVATE_PAT_HI, pat >> 32); } +static void gen6_gmch_remove(struct i915_address_space *vm) +{ + struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm); + + iounmap(ggtt->gsm); + free_scratch_page(vm->dev, vm->scratch_page); +} + static int gen8_gmch_probe(struct i915_ggtt *ggtt) { struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev); struct pci_dev *pdev = dev_priv->drm.pdev; + unsigned int size; u16 snb_gmch_ctl; - int ret; /* TODO: We're not aware of mappable constraints on gen8 yet */ ggtt->mappable_base = pci_resource_start(pdev, 2); @@ -3052,24 +3057,23 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt) if (INTEL_GEN(dev_priv) >= 9) { ggtt->stolen_size = gen9_get_stolen_size(snb_gmch_ctl); - ggtt->size = gen8_get_total_gtt_size(snb_gmch_ctl); + size = gen8_get_total_gtt_size(snb_gmch_ctl); } else if (IS_CHERRYVIEW(dev_priv)) { ggtt->stolen_size = chv_get_stolen_size(snb_gmch_ctl); - ggtt->size = chv_get_total_gtt_size(snb_gmch_ctl); + size = chv_get_total_gtt_size(snb_gmch_ctl); } else { ggtt->stolen_size = gen8_get_stolen_size(snb_gmch_ctl); - ggtt->size = gen8_get_total_gtt_size(snb_gmch_ctl); + size = gen8_get_total_gtt_size(snb_gmch_ctl); } - ggtt->base.total = (ggtt->size / sizeof(gen8_pte_t)) << PAGE_SHIFT; + ggtt->base.total = (size / sizeof(gen8_pte_t)) << PAGE_SHIFT; if (IS_CHERRYVIEW(dev_priv) || IS_BROXTON(dev_priv)) chv_setup_private_ppat(dev_priv); else bdw_setup_private_ppat(dev_priv); - ret = ggtt_probe_common(dev_priv, ggtt->size); - + ggtt->base.cleanup = gen6_gmch_remove; ggtt->base.bind_vma = ggtt_bind_vma; ggtt->base.unbind_vma = ggtt_unbind_vma; ggtt->base.insert_page = gen8_ggtt_insert_page; @@ -3081,15 +3085,15 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt) if (IS_CHERRYVIEW(dev_priv)) ggtt->base.insert_entries = gen8_ggtt_insert_entries__BKL; - return ret; + return ggtt_probe_common(ggtt, size); } static int gen6_gmch_probe(struct i915_ggtt *ggtt) { struct drm_i915_private *dev_priv = to_i915(ggtt->base.dev); struct pci_dev *pdev = dev_priv->drm.pdev; + unsigned int size; u16 snb_gmch_ctl; - int ret; ggtt->mappable_base = pci_resource_start(pdev, 2); ggtt->mappable_end = pci_resource_len(pdev, 2); @@ -3097,7 +3101,7 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt) /* 64/512MB is the current min/max we actually know of, but this is just * a coarse sanity check. */ - if ((ggtt->mappable_end < (64<<20) || (ggtt->mappable_end > (512<<20)))) { + if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end > (512<<20)) { DRM_ERROR("Unknown GMADR size (%llx)\n", ggtt->mappable_end); return -ENXIO; } @@ -3107,26 +3111,34 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt) pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); ggtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); - ggtt->size = gen6_get_total_gtt_size(snb_gmch_ctl); - ggtt->base.total = (ggtt->size / sizeof(gen6_pte_t)) << PAGE_SHIFT; - ret = ggtt_probe_common(dev_priv, ggtt->size); + size = gen6_get_total_gtt_size(snb_gmch_ctl); + ggtt->base.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT; ggtt->base.clear_range = gen6_ggtt_clear_range; ggtt->base.insert_page = gen6_ggtt_insert_page; ggtt->base.insert_entries = gen6_ggtt_insert_entries; ggtt->base.bind_vma = ggtt_bind_vma; ggtt->base.unbind_vma = ggtt_unbind_vma; + ggtt->base.cleanup = gen6_gmch_remove; + + if (HAS_EDRAM(dev_priv)) + ggtt->base.pte_encode = iris_pte_encode; + else if (IS_HASWELL(dev_priv)) + ggtt->base.pte_encode = hsw_pte_encode; + else if (IS_VALLEYVIEW(dev_priv)) + ggtt->base.pte_encode = byt_pte_encode; + else if (INTEL_GEN(dev_priv) >= 7) + ggtt->base.pte_encode = ivb_pte_encode; + else + ggtt->base.pte_encode = snb_pte_encode; - return ret; + return ggtt_probe_common(ggtt, size); } -static void gen6_gmch_remove(struct i915_address_space *vm) +static void i915_gmch_remove(struct i915_address_space *vm) { - struct i915_ggtt *ggtt = container_of(vm, struct i915_ggtt, base); - - iounmap(ggtt->gsm); - free_scratch_page(vm->dev, vm->scratch_page); + intel_gmch_remove(); } static int i915_gmch_probe(struct i915_ggtt *ggtt) @@ -3149,6 +3161,7 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt) ggtt->base.clear_range = i915_ggtt_clear_range; ggtt->base.bind_vma = ggtt_bind_vma; ggtt->base.unbind_vma = ggtt_unbind_vma; + ggtt->base.cleanup = i915_gmch_remove; if (unlikely(ggtt->do_idle_maps)) DRM_INFO("applying Ironlake quirks for intel_iommu\n"); @@ -3156,11 +3169,6 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt) return 0; } -static void i915_gmch_remove(struct i915_address_space *vm) -{ - intel_gmch_remove(); -} - /** * i915_ggtt_probe_hw - Probe GGTT hardware location * @dev_priv: i915 device @@ -3170,32 +3178,15 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv) struct i915_ggtt *ggtt = &dev_priv->ggtt; int ret; - if (INTEL_GEN(dev_priv) <= 5) { - ggtt->probe = i915_gmch_probe; - ggtt->base.cleanup = i915_gmch_remove; - } else if (INTEL_GEN(dev_priv) < 8) { - ggtt->probe = gen6_gmch_probe; - ggtt->base.cleanup = gen6_gmch_remove; - - if (HAS_EDRAM(dev_priv)) - ggtt->base.pte_encode = iris_pte_encode; - else if (IS_HASWELL(dev_priv)) - ggtt->base.pte_encode = hsw_pte_encode; - else if (IS_VALLEYVIEW(dev_priv)) - ggtt->base.pte_encode = byt_pte_encode; - else if (INTEL_GEN(dev_priv) >= 7) - ggtt->base.pte_encode = ivb_pte_encode; - else - ggtt->base.pte_encode = snb_pte_encode; - } else { - ggtt->probe = gen8_gmch_probe; - ggtt->base.cleanup = gen6_gmch_remove; - } - ggtt->base.dev = &dev_priv->drm; ggtt->base.is_ggtt = true; - ret = ggtt->probe(ggtt); + if (INTEL_GEN(dev_priv) <= 5) + ret = i915_gmch_probe(ggtt); + else if (INTEL_GEN(dev_priv) < 8) + ret = gen6_gmch_probe(ggtt); + else + ret = gen8_gmch_probe(ggtt); if (ret) return ret; diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index bb399930a51a..48ce7222cc32 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -354,7 +354,6 @@ struct i915_ggtt { size_t stolen_usable_size; /* Total size minus BIOS reserved */ size_t stolen_reserved_base; size_t stolen_reserved_size; - size_t size; /* Total size of Global GTT */ u64 mappable_end; /* End offset that we can CPU map */ struct io_mapping *mappable; /* Mapping to our CPU mappable region */ phys_addr_t mappable_base; /* PA of our GMADR */ @@ -365,8 +364,6 @@ struct i915_ggtt { bool do_idle_maps; int mtrr; - - int (*probe)(struct i915_ggtt *ggtt); }; struct i915_hw_ppgtt { -- 2.20.1